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 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
 157 {
 158         return p2p ? p2p->p2ps_adv_list : NULL;
 159 }
 160
 161
 162 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 163 {
 164         struct p2p_device *dev = NULL;
 165
 166         if (!addr || !p2p)
 167                 return 0;
 168
 169         dev = p2p_get_device(p2p, addr);
 170         if (dev)
 171                 return dev->wps_prov_info;
 172         else
 173                 return 0;
 174 }
 175
 176
 177 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 178 {
 179         struct p2p_device *dev = NULL;
 180
 181         if (!addr || !p2p)
 182                 return;
 183
 184         dev = p2p_get_device(p2p, addr);
 185         if (dev)
 186                 dev->wps_prov_info = 0;
 187 }
 188
 189
 190 void p2p_set_state(struct p2p_data *p2p, int new_state)
 191 {
 192         p2p_dbg(p2p, "State %s -> %s",
 193                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 194         p2p->state = new_state;
 195
 196         if (new_state == P2P_IDLE && p2p->pending_channel) {
 197                 p2p_dbg(p2p, "Apply change in listen channel");
 198                 p2p->cfg->reg_class = p2p->pending_reg_class;
 199                 p2p->cfg->channel = p2p->pending_channel;
 200                 p2p->pending_reg_class = 0;
 201                 p2p->pending_channel = 0;
 202         }
 203 }
 204
 205
 206 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 207 {
 208         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 209                 p2p_state_txt(p2p->state), sec, usec);
 210         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 211         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 212 }
 213
 214
 215 void p2p_clear_timeout(struct p2p_data *p2p)
 216 {
 217         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 218         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 219 }
 220
 221
 222 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
 223 {
 224         struct p2p_go_neg_results res;
 225         struct p2p_device *peer = p2p->go_neg_peer;
 226
 227         if (!peer)
 228                 return;
 229
 230         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 231         if (p2p->state != P2P_SEARCH) {
 232                 /*
 233                  * Clear timeouts related to GO Negotiation if no new p2p_find
 234                  * has been started.
 235                  */
 236                 p2p_clear_timeout(p2p);
 237                 p2p_set_state(p2p, P2P_IDLE);
 238         }
 239
 240         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 241         peer->wps_method = WPS_NOT_READY;
 242         peer->oob_pw_id = 0;
 243         wpabuf_free(peer->go_neg_conf);
 244         peer->go_neg_conf = NULL;
 245         p2p->go_neg_peer = NULL;
 246
 247         os_memset(&res, 0, sizeof(res));
 248         res.status = status;
 249         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 250         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 251         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 252 }
 253
 254
 255 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 256 {
 257         unsigned int r, tu;
 258         int freq;
 259         struct wpabuf *ies;
 260
 261         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 262                 p2p_state_txt(p2p->state));
 263
 264         if (p2p->pending_listen_freq) {
 265                 /* We have a pending p2p_listen request */
 266                 p2p_dbg(p2p, "p2p_listen command pending already");
 267                 return;
 268         }
 269
 270         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 271         if (freq < 0) {
 272                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 273                 return;
 274         }
 275
 276         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 277                 r = 0;
 278         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 279               p2p->min_disc_int) * 100;
 280         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 281                 tu = p2p->max_disc_tu;
 282         if (!dev_disc && tu < 100)
 283                 tu = 100; /* Need to wait in non-device discovery use cases */
 284         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 285                 tu = p2p->cfg->max_listen * 1000 / 1024;
 286
 287         if (tu == 0) {
 288                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 289                 p2p_set_timeout(p2p, 0, 0);
 290                 return;
 291         }
 292
 293         ies = p2p_build_probe_resp_ies(p2p);
 294         if (ies == NULL)
 295                 return;
 296
 297         p2p->pending_listen_freq = freq;
 298         p2p->pending_listen_sec = 0;
 299         p2p->pending_listen_usec = 1024 * tu;
 300
 301         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 302                     ies) < 0) {
 303                 p2p_dbg(p2p, "Failed to start listen mode");
 304                 p2p->pending_listen_freq = 0;
 305         }
 306         wpabuf_free(ies);
 307 }
 308
 309
 310 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 311 {
 312         int freq;
 313         struct wpabuf *ies;
 314
 315         p2p_dbg(p2p, "Going to listen(only) state");
 316
 317         if (p2p->pending_listen_freq) {
 318                 /* We have a pending p2p_listen request */
 319                 p2p_dbg(p2p, "p2p_listen command pending already");
 320                 return -1;
 321         }
 322
 323         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 324         if (freq < 0) {
 325                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 326                 return -1;
 327         }
 328
 329         p2p->pending_listen_sec = timeout / 1000;
 330         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 331
 332         if (p2p->p2p_scan_running) {
 333                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 334                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 335                         return 0;
 336                 }
 337                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 338                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 339                 return 0;
 340         }
 341
 342         ies = p2p_build_probe_resp_ies(p2p);
 343         if (ies == NULL)
 344                 return -1;
 345
 346         p2p->pending_listen_freq = freq;
 347
 348         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 349                 p2p_dbg(p2p, "Failed to start listen mode");
 350                 p2p->pending_listen_freq = 0;
 351                 wpabuf_free(ies);
 352                 return -1;
 353         }
 354         wpabuf_free(ies);
 355
 356         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 357
 358         return 0;
 359 }
 360
 361
 362 static void p2p_device_clear_reported(struct p2p_data *p2p)
 363 {
 364         struct p2p_device *dev;
 365         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 366                 dev->flags &= ~P2P_DEV_REPORTED;
 367                 dev->sd_reqs = 0;
 368         }
 369 }
 370
 371
 372 /**
 373  * p2p_get_device - Fetch a peer entry
 374  * @p2p: P2P module context from p2p_init()
 375  * @addr: P2P Device Address of the peer
 376  * Returns: Pointer to the device entry or %NULL if not found
 377  */
 378 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 379 {
 380         struct p2p_device *dev;
 381         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 382                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 383                         return dev;
 384         }
 385         return NULL;
 386 }
 387
 388
 389 /**
 390  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 391  * @p2p: P2P module context from p2p_init()
 392  * @addr: P2P Interface Address of the peer
 393  * Returns: Pointer to the device entry or %NULL if not found
 394  */
 395 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 396                                              const u8 *addr)
 397 {
 398         struct p2p_device *dev;
 399         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 400                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 401                         return dev;
 402         }
 403         return NULL;
 404 }
 405
 406
 407 /**
 408  * p2p_create_device - Create a peer entry
 409  * @p2p: P2P module context from p2p_init()
 410  * @addr: P2P Device Address of the peer
 411  * Returns: Pointer to the device entry or %NULL on failure
 412  *
 413  * If there is already an entry for the peer, it will be returned instead of
 414  * creating a new one.
 415  */
 416 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 417                                              const u8 *addr)
 418 {
 419         struct p2p_device *dev, *oldest = NULL;
 420         size_t count = 0;
 421
 422         dev = p2p_get_device(p2p, addr);
 423         if (dev)
 424                 return dev;
 425
 426         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 427                 count++;
 428                 if (oldest == NULL ||
 429                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 430                         oldest = dev;
 431         }
 432         if (count + 1 > p2p->cfg->max_peers && oldest) {
 433                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 434                 dl_list_del(&oldest->list);
 435                 p2p_device_free(p2p, oldest);
 436         }
 437
 438         dev = os_zalloc(sizeof(*dev));
 439         if (dev == NULL)
 440                 return NULL;
 441         dl_list_add(&p2p->devices, &dev->list);
 442         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 443
 444         return dev;
 445 }
 446
 447
 448 static void p2p_copy_client_info(struct p2p_device *dev,
 449                                  struct p2p_client_info *cli)
 450 {
 451         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 452         dev->info.device_name[cli->dev_name_len] = '\0';
 453         dev->info.dev_capab = cli->dev_capab;
 454         dev->info.config_methods = cli->config_methods;
 455         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 456         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 457         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 458                   dev->info.wps_sec_dev_type_list_len);
 459 }
 460
 461
 462 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 463                                  const u8 *go_interface_addr, int freq,
 464                                  const u8 *gi, size_t gi_len)
 465 {
 466         struct p2p_group_info info;
 467         size_t c;
 468         struct p2p_device *dev;
 469
 470         if (gi == NULL)
 471                 return 0;
 472
 473         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 474                 return -1;
 475
 476         /*
 477          * Clear old data for this group; if the devices are still in the
 478          * group, the information will be restored in the loop following this.
 479          */
 480         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 481                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 482                               ETH_ALEN) == 0) {
 483                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 484                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 485                 }
 486         }
 487
 488         for (c = 0; c < info.num_clients; c++) {
 489                 struct p2p_client_info *cli = &info.client[c];
 490                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 491                               ETH_ALEN) == 0)
 492                         continue; /* ignore our own entry */
 493                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 494                 if (dev) {
 495                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 496                                           P2P_DEV_PROBE_REQ_ONLY)) {
 497                                 /*
 498                                  * Update information since we have not
 499                                  * received this directly from the client.
 500                                  */
 501                                 p2p_copy_client_info(dev, cli);
 502                         } else {
 503                                 /*
 504                                  * Need to update P2P Client Discoverability
 505                                  * flag since it is valid only in P2P Group
 506                                  * Info attribute.
 507                                  */
 508                                 dev->info.dev_capab &=
 509                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 510                                 dev->info.dev_capab |=
 511                                         cli->dev_capab &
 512                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 513                         }
 514                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 515                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 516                         }
 517                 } else {
 518                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 519                         if (dev == NULL)
 520                                 continue;
 521                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 522                         p2p_copy_client_info(dev, cli);
 523                         dev->oper_freq = freq;
 524                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 525                                             dev->info.p2p_device_addr,
 526                                             &dev->info, 1);
 527                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 528                 }
 529
 530                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 531                           ETH_ALEN);
 532                 os_get_reltime(&dev->last_seen);
 533                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 534                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 535                           ETH_ALEN);
 536         }
 537
 538         return 0;
 539 }
 540
 541
 542 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 543                               int probe_req, const struct p2p_message *msg)
 544 {
 545         os_memcpy(dev->info.device_name, msg->device_name,
 546                   sizeof(dev->info.device_name));
 547
 548         if (msg->manufacturer &&
 549             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 550                 os_memset(dev->info.manufacturer, 0,
 551                           sizeof(dev->info.manufacturer));
 552                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 553                           msg->manufacturer_len);
 554         }
 555
 556         if (msg->model_name &&
 557             msg->model_name_len < sizeof(dev->info.model_name)) {
 558                 os_memset(dev->info.model_name, 0,
 559                           sizeof(dev->info.model_name));
 560                 os_memcpy(dev->info.model_name, msg->model_name,
 561                           msg->model_name_len);
 562         }
 563
 564         if (msg->model_number &&
 565             msg->model_number_len < sizeof(dev->info.model_number)) {
 566                 os_memset(dev->info.model_number, 0,
 567                           sizeof(dev->info.model_number));
 568                 os_memcpy(dev->info.model_number, msg->model_number,
 569                           msg->model_number_len);
 570         }
 571
 572         if (msg->serial_number &&
 573             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 574                 os_memset(dev->info.serial_number, 0,
 575                           sizeof(dev->info.serial_number));
 576                 os_memcpy(dev->info.serial_number, msg->serial_number,
 577                           msg->serial_number_len);
 578         }
 579
 580         if (msg->pri_dev_type)
 581                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 582                           sizeof(dev->info.pri_dev_type));
 583         else if (msg->wps_pri_dev_type)
 584                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 585                           sizeof(dev->info.pri_dev_type));
 586
 587         if (msg->wps_sec_dev_type_list) {
 588                 os_memcpy(dev->info.wps_sec_dev_type_list,
 589                           msg->wps_sec_dev_type_list,
 590                           msg->wps_sec_dev_type_list_len);
 591                 dev->info.wps_sec_dev_type_list_len =
 592                         msg->wps_sec_dev_type_list_len;
 593         }
 594
 595         if (msg->capability) {
 596                 /*
 597                  * P2P Client Discoverability bit is reserved in all frames
 598                  * that use this function, so do not change its value here.
 599                  */
 600                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 601                 dev->info.dev_capab |= msg->capability[0] &
 602                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 603                 dev->info.group_capab = msg->capability[1];
 604         }
 605
 606         if (msg->ext_listen_timing) {
 607                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 608                 dev->ext_listen_interval =
 609                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 610         }
 611
 612         if (!probe_req) {
 613                 u16 new_config_methods;
 614                 new_config_methods = msg->config_methods ?
 615                         msg->config_methods : msg->wps_config_methods;
 616                 if (new_config_methods &&
 617                     dev->info.config_methods != new_config_methods) {
 618                         p2p_dbg(p2p, "Update peer " MACSTR
 619                                 " config_methods 0x%x -> 0x%x",
 620                                 MAC2STR(dev->info.p2p_device_addr),
 621                                 dev->info.config_methods,
 622                                 new_config_methods);
 623                         dev->info.config_methods = new_config_methods;
 624                 }
 625         }
 626 }
 627
 628
 629 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 630                                          size_t ies_len)
 631 {
 632         const u8 *pos, *end;
 633         u8 id, len;
 634
 635         wpabuf_free(dev->info.vendor_elems);
 636         dev->info.vendor_elems = NULL;
 637
 638         end = ies + ies_len;
 639
 640         for (pos = ies; pos + 1 < end; pos += len) {
 641                 id = *pos++;
 642                 len = *pos++;
 643
 644                 if (pos + len > end)
 645                         break;
 646
 647                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 648                         continue;
 649
 650                 if (len >= 4) {
 651                         u32 type = WPA_GET_BE32(pos);
 652
 653                         if (type == WPA_IE_VENDOR_TYPE ||
 654                             type == WMM_IE_VENDOR_TYPE ||
 655                             type == WPS_IE_VENDOR_TYPE ||
 656                             type == P2P_IE_VENDOR_TYPE ||
 657                             type == WFD_IE_VENDOR_TYPE)
 658                                 continue;
 659                 }
 660
 661                 /* Unknown vendor element - make raw IE data available */
 662                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 663                         break;
 664                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 665         }
 666 }
 667
 668
 669 static int p2p_compare_wfd_info(struct p2p_device *dev,
 670                               const struct p2p_message *msg)
 671 {
 672         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 673                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 674                         return 1;
 675
 676                 return os_memcmp(dev->info.wfd_subelems->buf,
 677                                  msg->wfd_subelems->buf,
 678                                  dev->info.wfd_subelems->used);
 679         }
 680         if (dev->info.wfd_subelems || msg->wfd_subelems)
 681                 return 1;
 682
 683         return 0;
 684 }
 685
 686
 687 /**
 688  * p2p_add_device - Add peer entries based on scan results or P2P frames
 689  * @p2p: P2P module context from p2p_init()
 690  * @addr: Source address of Beacon or Probe Response frame (may be either
 691  *      P2P Device Address or P2P Interface Address)
 692  * @level: Signal level (signal strength of the received frame from the peer)
 693  * @freq: Frequency on which the Beacon or Probe Response frame was received
 694  * @rx_time: Time when the result was received
 695  * @ies: IEs from the Beacon or Probe Response frame
 696  * @ies_len: Length of ies buffer in octets
 697  * @scan_res: Whether this was based on scan results
 698  * Returns: 0 on success, -1 on failure
 699  *
 700  * If the scan result is for a GO, the clients in the group will also be added
 701  * to the peer table. This function can also be used with some other frames
 702  * like Provision Discovery Request that contains P2P Capability and P2P Device
 703  * Info attributes.
 704  */
 705 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 706                    struct os_reltime *rx_time, int level, const u8 *ies,
 707                    size_t ies_len, int scan_res)
 708 {
 709         struct p2p_device *dev;
 710         struct p2p_message msg;
 711         const u8 *p2p_dev_addr;
 712         int wfd_changed;
 713         int i;
 714         struct os_reltime time_now;
 715
 716         os_memset(&msg, 0, sizeof(msg));
 717         if (p2p_parse_ies(ies, ies_len, &msg)) {
 718                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 719                 p2p_parse_free(&msg);
 720                 return -1;
 721         }
 722
 723         if (msg.p2p_device_addr)
 724                 p2p_dev_addr = msg.p2p_device_addr;
 725         else if (msg.device_id)
 726                 p2p_dev_addr = msg.device_id;
 727         else {
 728                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 729                 p2p_parse_free(&msg);
 730                 return -1;
 731         }
 732
 733         if (!is_zero_ether_addr(p2p->peer_filter) &&
 734             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 735                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 736                         " due to peer filter", MAC2STR(p2p_dev_addr));
 737                 p2p_parse_free(&msg);
 738                 return 0;
 739         }
 740
 741         dev = p2p_create_device(p2p, p2p_dev_addr);
 742         if (dev == NULL) {
 743                 p2p_parse_free(&msg);
 744                 return -1;
 745         }
 746
 747         if (rx_time == NULL) {
 748                 os_get_reltime(&time_now);
 749                 rx_time = &time_now;
 750         }
 751
 752         /*
 753          * Update the device entry only if the new peer
 754          * entry is newer than the one previously stored.
 755          */
 756         if (dev->last_seen.sec > 0 &&
 757             os_reltime_before(rx_time, &dev->last_seen)) {
 758                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 759                         (unsigned int) rx_time->sec,
 760                         (unsigned int) rx_time->usec,
 761                         (unsigned int) dev->last_seen.sec,
 762                         (unsigned int) dev->last_seen.usec);
 763                 p2p_parse_free(&msg);
 764                 return -1;
 765         }
 766
 767         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 768
 769         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 770
 771         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 772                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 773         if (msg.ssid &&
 774             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 775              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 776              != 0)) {
 777                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 778                 dev->oper_ssid_len = msg.ssid[1];
 779         }
 780
 781         if (msg.adv_service_instance && msg.adv_service_instance_len) {
 782                 wpabuf_free(dev->info.p2ps_instance);
 783                 dev->info.p2ps_instance = wpabuf_alloc_copy(
 784                         msg.adv_service_instance, msg.adv_service_instance_len);
 785         }
 786
 787         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 788             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 789                 int ds_freq;
 790                 if (*msg.ds_params == 14)
 791                         ds_freq = 2484;
 792                 else
 793                         ds_freq = 2407 + *msg.ds_params * 5;
 794                 if (freq != ds_freq) {
 795                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 796                                 freq, ds_freq);
 797                         freq = ds_freq;
 798                 }
 799         }
 800
 801         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 802                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 803                         MACSTR " %d -> %d MHz (DS param %d)",
 804                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 805                         freq, msg.ds_params ? *msg.ds_params : -1);
 806         }
 807         if (scan_res) {
 808                 dev->listen_freq = freq;
 809                 if (msg.group_info)
 810                         dev->oper_freq = freq;
 811         }
 812         dev->info.level = level;
 813
 814         p2p_copy_wps_info(p2p, dev, 0, &msg);
 815
 816         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 817                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 818                 dev->info.wps_vendor_ext[i] = NULL;
 819         }
 820
 821         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 822                 if (msg.wps_vendor_ext[i] == NULL)
 823                         break;
 824                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 825                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 826                 if (dev->info.wps_vendor_ext[i] == NULL)
 827                         break;
 828         }
 829
 830         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 831
 832         if (msg.wfd_subelems) {
 833                 wpabuf_free(dev->info.wfd_subelems);
 834                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 835         }
 836
 837         if (scan_res) {
 838                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 839                                       msg.group_info, msg.group_info_len);
 840         }
 841
 842         p2p_parse_free(&msg);
 843
 844         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 845
 846         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
 847             (!msg.adv_service_instance ||
 848              (dev->flags & P2P_DEV_P2PS_REPORTED)))
 849                 return 0;
 850
 851         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 852                 freq, (unsigned int) rx_time->sec,
 853                 (unsigned int) rx_time->usec);
 854         if (dev->flags & P2P_DEV_USER_REJECTED) {
 855                 p2p_dbg(p2p, "Do not report rejected device");
 856                 return 0;
 857         }
 858
 859         if (dev->info.config_methods == 0 &&
 860             (freq == 2412 || freq == 2437 || freq == 2462)) {
 861                 /*
 862                  * If we have only seen a Beacon frame from a GO, we do not yet
 863                  * know what WPS config methods it supports. Since some
 864                  * applications use config_methods value from P2P-DEVICE-FOUND
 865                  * events, postpone reporting this peer until we've fully
 866                  * discovered its capabilities.
 867                  *
 868                  * At least for now, do this only if the peer was detected on
 869                  * one of the social channels since that peer can be easily be
 870                  * found again and there are no limitations of having to use
 871                  * passive scan on this channels, so this can be done through
 872                  * Probe Response frame that includes the config_methods
 873                  * information.
 874                  */
 875                 p2p_dbg(p2p, "Do not report peer " MACSTR
 876                         " with unknown config methods", MAC2STR(addr));
 877                 return 0;
 878         }
 879
 880         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 881                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 882         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 883
 884         if (msg.adv_service_instance)
 885                 dev->flags |= P2P_DEV_P2PS_REPORTED;
 886
 887         return 0;
 888 }
 889
 890
 891 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 892 {
 893         int i;
 894
 895         if (p2p->go_neg_peer == dev) {
 896                 /*
 897                  * If GO Negotiation is in progress, report that it has failed.
 898                  */
 899                 p2p_go_neg_failed(p2p, -1);
 900         }
 901         if (p2p->invite_peer == dev)
 902                 p2p->invite_peer = NULL;
 903         if (p2p->sd_peer == dev)
 904                 p2p->sd_peer = NULL;
 905         if (p2p->pending_client_disc_go == dev)
 906                 p2p->pending_client_disc_go = NULL;
 907
 908         /* dev_lost() device, but only if it was previously dev_found() */
 909         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 910                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 911                                    dev->info.p2p_device_addr);
 912
 913         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 914                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 915                 dev->info.wps_vendor_ext[i] = NULL;
 916         }
 917
 918         wpabuf_free(dev->info.wfd_subelems);
 919         wpabuf_free(dev->info.vendor_elems);
 920         wpabuf_free(dev->go_neg_conf);
 921         wpabuf_free(dev->info.p2ps_instance);
 922
 923         os_free(dev);
 924 }
 925
 926
 927 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 928 {
 929         struct p2p_channels *c;
 930         struct p2p_reg_class *cla;
 931         size_t cl, ch;
 932         int found = 0;
 933         u8 reg_class;
 934         u8 channel;
 935         int freq;
 936
 937         c = &p2p->cfg->channels;
 938         for (cl = 0; cl < c->reg_classes; cl++) {
 939                 cla = &c->reg_class[cl];
 940                 if (cla->reg_class != p2p->last_prog_scan_class)
 941                         continue;
 942                 for (ch = 0; ch < cla->channels; ch++) {
 943                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 944                                 found = 1;
 945                                 break;
 946                         }
 947                 }
 948                 if (found)
 949                         break;
 950         }
 951
 952         if (!found) {
 953                 /* Start from beginning */
 954                 reg_class = c->reg_class[0].reg_class;
 955                 channel = c->reg_class[0].channel[0];
 956         } else {
 957                 /* Pick the next channel */
 958                 ch++;
 959                 if (ch == cla->channels) {
 960                         cl++;
 961                         if (cl == c->reg_classes)
 962                                 cl = 0;
 963                         ch = 0;
 964                 }
 965                 reg_class = c->reg_class[cl].reg_class;
 966                 channel = c->reg_class[cl].channel[ch];
 967         }
 968
 969         freq = p2p_channel_to_freq(reg_class, channel);
 970         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 971                 reg_class, channel, freq);
 972         p2p->last_prog_scan_class = reg_class;
 973         p2p->last_prog_scan_chan = channel;
 974
 975         if (freq == 2412 || freq == 2437 || freq == 2462)
 976                 return 0; /* No need to add social channels */
 977         return freq;
 978 }
 979
 980
 981 static void p2p_search(struct p2p_data *p2p)
 982 {
 983         int freq = 0;
 984         enum p2p_scan_type type;
 985         u16 pw_id = DEV_PW_DEFAULT;
 986         int res;
 987
 988         if (p2p->drv_in_listen) {
 989                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 990                 return;
 991         }
 992         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 993
 994         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 995             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 996                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 997                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 998         } else {
 999                 type = P2P_SCAN_SOCIAL;
1000                 p2p_dbg(p2p, "Starting search");
1001         }
1002
1003         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1004                                  p2p->num_req_dev_types, p2p->req_dev_types,
1005                                  p2p->find_dev_id, pw_id);
1006         if (res < 0) {
1007                 p2p_dbg(p2p, "Scan request schedule failed");
1008                 p2p_continue_find(p2p);
1009         }
1010 }
1011
1012
1013 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1014 {
1015         struct p2p_data *p2p = eloop_ctx;
1016         p2p_dbg(p2p, "Find timeout -> stop");
1017         p2p_stop_find(p2p);
1018 }
1019
1020
1021 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1022 {
1023         if (status != 0) {
1024                 p2p_dbg(p2p, "Scan request failed");
1025                 /* Do continue find even for the first p2p_find_scan */
1026                 p2p_continue_find(p2p);
1027         } else {
1028                 p2p_dbg(p2p, "Running p2p_scan");
1029                 p2p->p2p_scan_running = 1;
1030                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1031                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1032                                        p2p, NULL);
1033         }
1034 }
1035
1036
1037 static int p2p_run_after_scan(struct p2p_data *p2p)
1038 {
1039         struct p2p_device *dev;
1040         enum p2p_after_scan op;
1041
1042         if (p2p->after_scan_tx) {
1043                 p2p->after_scan_tx_in_progress = 1;
1044                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1045                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1046                                       p2p->after_scan_tx->freq,
1047                                       p2p->after_scan_tx->dst,
1048                                       p2p->after_scan_tx->src,
1049                                       p2p->after_scan_tx->bssid,
1050                                       (u8 *) (p2p->after_scan_tx + 1),
1051                                       p2p->after_scan_tx->len,
1052                                       p2p->after_scan_tx->wait_time);
1053                 os_free(p2p->after_scan_tx);
1054                 p2p->after_scan_tx = NULL;
1055                 return 1;
1056         }
1057
1058         op = p2p->start_after_scan;
1059         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1060         switch (op) {
1061         case P2P_AFTER_SCAN_NOTHING:
1062                 break;
1063         case P2P_AFTER_SCAN_LISTEN:
1064                 p2p_dbg(p2p, "Start previously requested Listen state");
1065                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1066                            p2p->pending_listen_usec / 1000);
1067                 return 1;
1068         case P2P_AFTER_SCAN_CONNECT:
1069                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1070                         MAC2STR(p2p->after_scan_peer));
1071                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1072                 if (dev == NULL) {
1073                         p2p_dbg(p2p, "Peer not known anymore");
1074                         break;
1075                 }
1076                 p2p_connect_send(p2p, dev);
1077                 return 1;
1078         }
1079
1080         return 0;
1081 }
1082
1083
1084 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1085 {
1086         struct p2p_data *p2p = eloop_ctx;
1087         int running;
1088         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1089         running = p2p->p2p_scan_running;
1090         /* Make sure we recover from missed scan results callback */
1091         p2p->p2p_scan_running = 0;
1092
1093         if (running)
1094                 p2p_run_after_scan(p2p);
1095 }
1096
1097
1098 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1099 {
1100         p2p->num_req_dev_types = 0;
1101         os_free(p2p->req_dev_types);
1102         p2p->req_dev_types = NULL;
1103 }
1104
1105
1106 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1107 {
1108         u8 buf[SHA256_MAC_LEN];
1109         char str_buf[256];
1110         const u8 *adv_array;
1111         size_t i, adv_len;
1112
1113         if (!str || !hash)
1114                 return 0;
1115
1116         if (!str[0]) {
1117                 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1118                 return 1;
1119         }
1120
1121         adv_array = (u8 *) str_buf;
1122         adv_len = os_strlen(str);
1123
1124         for (i = 0; str[i] && i < adv_len; i++) {
1125                 if (str[i] >= 'A' && str[i] <= 'Z')
1126                         str_buf[i] = str[i] - 'A' + 'a';
1127                 else
1128                         str_buf[i] = str[i];
1129         }
1130
1131         if (sha256_vector(1, &adv_array, &adv_len, buf))
1132                 return 0;
1133
1134         os_memcpy(hash, buf, P2PS_HASH_LEN);
1135         return 1;
1136 }
1137
1138
1139 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1140              enum p2p_discovery_type type,
1141              unsigned int num_req_dev_types, const u8 *req_dev_types,
1142              const u8 *dev_id, unsigned int search_delay,
1143              u8 seek_count, const char **seek)
1144 {
1145         int res;
1146
1147         p2p_dbg(p2p, "Starting find (type=%d)", type);
1148         os_get_reltime(&p2p->find_start);
1149         if (p2p->p2p_scan_running) {
1150                 p2p_dbg(p2p, "p2p_scan is already running");
1151         }
1152
1153         p2p_free_req_dev_types(p2p);
1154         if (req_dev_types && num_req_dev_types) {
1155                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1156                                                WPS_DEV_TYPE_LEN);
1157                 if (p2p->req_dev_types == NULL)
1158                         return -1;
1159                 os_memcpy(p2p->req_dev_types, req_dev_types,
1160                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1161                 p2p->num_req_dev_types = num_req_dev_types;
1162         }
1163
1164         if (dev_id) {
1165                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1166                 p2p->find_dev_id = p2p->find_dev_id_buf;
1167         } else
1168                 p2p->find_dev_id = NULL;
1169
1170         if (seek_count == 0 || !seek) {
1171                 /* Not an ASP search */
1172                 p2p->p2ps_seek = 0;
1173         } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1174                 /*
1175                  * An empty seek string means no hash values, but still an ASP
1176                  * search.
1177                  */
1178                 p2p->p2ps_seek_count = 0;
1179                 p2p->p2ps_seek = 1;
1180         } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1181                 u8 buf[P2PS_HASH_LEN];
1182                 int i;
1183
1184                 p2p->p2ps_seek_count = seek_count;
1185                 for (i = 0; i < seek_count; i++) {
1186                         if (!p2ps_gen_hash(p2p, seek[i], buf))
1187                                 continue;
1188
1189                         /* If asking for wildcard, don't do others */
1190                         if (os_memcmp(buf, p2p->wild_card_hash,
1191                                       P2PS_HASH_LEN) == 0) {
1192                                 p2p->p2ps_seek_count = 0;
1193                                 break;
1194                         }
1195
1196                         os_memcpy(&p2p->query_hash[i * P2PS_HASH_LEN], buf,
1197                                   P2PS_HASH_LEN);
1198                 }
1199                 p2p->p2ps_seek = 1;
1200         } else {
1201                 p2p->p2ps_seek_count = 0;
1202                 p2p->p2ps_seek = 1;
1203         }
1204
1205         /* Special case to perform wildcard search */
1206         if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1207                 p2p->p2ps_seek_count = 1;
1208                 os_memcpy(&p2p->query_hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1209         }
1210
1211         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1212         p2p_clear_timeout(p2p);
1213         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1214         p2p->find_type = type;
1215         p2p_device_clear_reported(p2p);
1216         p2p_set_state(p2p, P2P_SEARCH);
1217         p2p->search_delay = search_delay;
1218         p2p->in_search_delay = 0;
1219         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1220         p2p->last_p2p_find_timeout = timeout;
1221         if (timeout)
1222                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1223                                        p2p, NULL);
1224         switch (type) {
1225         case P2P_FIND_START_WITH_FULL:
1226         case P2P_FIND_PROGRESSIVE:
1227                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1228                                          p2p->num_req_dev_types,
1229                                          p2p->req_dev_types, dev_id,
1230                                          DEV_PW_DEFAULT);
1231                 break;
1232         case P2P_FIND_ONLY_SOCIAL:
1233                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1234                                          p2p->num_req_dev_types,
1235                                          p2p->req_dev_types, dev_id,
1236                                          DEV_PW_DEFAULT);
1237                 break;
1238         default:
1239                 return -1;
1240         }
1241
1242         if (res != 0 && p2p->p2p_scan_running) {
1243                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1244                 /* wait for the previous p2p_scan to complete */
1245                 res = 0; /* do not report failure */
1246         } else if (res != 0) {
1247                 p2p_dbg(p2p, "Failed to start p2p_scan");
1248                 p2p_set_state(p2p, P2P_IDLE);
1249                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1250         }
1251
1252         return res;
1253 }
1254
1255
1256 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1257 {
1258         p2p_dbg(p2p, "Stopping find");
1259         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1260         p2p_clear_timeout(p2p);
1261         if (p2p->state == P2P_SEARCH)
1262                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1263
1264         p2p->p2ps_seek_count = 0;
1265
1266         p2p_set_state(p2p, P2P_IDLE);
1267         p2p_free_req_dev_types(p2p);
1268         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1269         if (p2p->go_neg_peer)
1270                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1271         p2p->go_neg_peer = NULL;
1272         p2p->sd_peer = NULL;
1273         p2p->invite_peer = NULL;
1274         p2p_stop_listen_for_freq(p2p, freq);
1275 }
1276
1277
1278 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1279 {
1280         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1281                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1282                 return;
1283         }
1284         if (p2p->in_listen) {
1285                 p2p->in_listen = 0;
1286                 p2p_clear_timeout(p2p);
1287         }
1288         if (p2p->drv_in_listen) {
1289                 /*
1290                  * The driver may not deliver callback to p2p_listen_end()
1291                  * when the operation gets canceled, so clear the internal
1292                  * variable that is tracking driver state.
1293                  */
1294                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1295                 p2p->drv_in_listen = 0;
1296         }
1297         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1298 }
1299
1300
1301 void p2p_stop_listen(struct p2p_data *p2p)
1302 {
1303         if (p2p->state != P2P_LISTEN_ONLY) {
1304                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1305                 return;
1306         }
1307
1308         p2p_stop_listen_for_freq(p2p, 0);
1309         p2p_set_state(p2p, P2P_IDLE);
1310 }
1311
1312
1313 void p2p_stop_find(struct p2p_data *p2p)
1314 {
1315         p2p->pending_listen_freq = 0;
1316         p2p_stop_find_for_freq(p2p, 0);
1317 }
1318
1319
1320 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1321                                     unsigned int force_freq,
1322                                     unsigned int pref_freq, int go)
1323 {
1324         u8 op_class, op_channel;
1325         unsigned int freq = force_freq ? force_freq : pref_freq;
1326
1327         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1328                 force_freq, pref_freq, go);
1329         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1330                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1331                 return -1;
1332         }
1333
1334         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1335             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1336                                           op_channel))) {
1337                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1338                         freq, op_class, op_channel);
1339                 return -1;
1340         }
1341
1342         p2p->op_reg_class = op_class;
1343         p2p->op_channel = op_channel;
1344
1345         if (force_freq) {
1346                 p2p->channels.reg_classes = 1;
1347                 p2p->channels.reg_class[0].channels = 1;
1348                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1349                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1350         } else {
1351                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1352                           sizeof(struct p2p_channels));
1353         }
1354
1355         return 0;
1356 }
1357
1358
1359 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1360 {
1361         u8 op_class, op_channel;
1362         const int op_classes_5ghz[] = { 124, 115, 0 };
1363         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1364         const int op_classes_vht[] = { 128, 0 };
1365
1366         p2p_dbg(p2p, "Prepare channel best");
1367
1368         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1369             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1370             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1371             == 0) {
1372                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1373                 p2p->op_reg_class = op_class;
1374                 p2p->op_channel = op_channel;
1375         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1376                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1377                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1378                    == 0) {
1379                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1380                 p2p->op_reg_class = op_class;
1381                 p2p->op_channel = op_channel;
1382         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1383                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1384                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1385                                        &op_channel) == 0) {
1386                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1387                 p2p->op_reg_class = op_class;
1388                 p2p->op_channel = op_channel;
1389         } else if (p2p->cfg->num_pref_chan > 0 &&
1390                    p2p_channels_includes(&p2p->cfg->channels,
1391                                          p2p->cfg->pref_chan[0].op_class,
1392                                          p2p->cfg->pref_chan[0].chan)) {
1393                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1394                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1395                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1396         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1397                                       &p2p->op_reg_class, &p2p->op_channel) ==
1398                    0) {
1399                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1400                         p2p->op_reg_class, p2p->op_channel);
1401         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1402                                       &p2p->op_reg_class, &p2p->op_channel) ==
1403                    0) {
1404                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1405                         p2p->op_reg_class, p2p->op_channel);
1406         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1407                                       &p2p->op_reg_class, &p2p->op_channel) ==
1408                    0) {
1409                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1410                         p2p->op_reg_class, p2p->op_channel);
1411         } else if (p2p_channels_includes(&p2p->cfg->channels,
1412                                          p2p->cfg->op_reg_class,
1413                                          p2p->cfg->op_channel)) {
1414                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1415                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1416                 p2p->op_channel = p2p->cfg->op_channel;
1417         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1418                                              &p2p->op_reg_class,
1419                                              &p2p->op_channel) == 0) {
1420                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1421                         p2p->op_reg_class, p2p->op_channel);
1422         } else {
1423                 /* Select any random available channel from the first available
1424                  * operating class */
1425                 p2p_channel_select(&p2p->cfg->channels, NULL,
1426                                    &p2p->op_reg_class,
1427                                    &p2p->op_channel);
1428                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1429                         p2p->op_channel, p2p->op_reg_class);
1430         }
1431
1432         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1433                   sizeof(struct p2p_channels));
1434 }
1435
1436
1437 /**
1438  * p2p_prepare_channel - Select operating channel for GO Negotiation
1439  * @p2p: P2P module context from p2p_init()
1440  * @dev: Selected peer device
1441  * @force_freq: Forced frequency in MHz or 0 if not forced
1442  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1443  * @go: Whether the local end will be forced to be GO
1444  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1445  *
1446  * This function is used to do initial operating channel selection for GO
1447  * Negotiation prior to having received peer information. The selected channel
1448  * may be further optimized in p2p_reselect_channel() once the peer information
1449  * is available.
1450  */
1451 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1452                         unsigned int force_freq, unsigned int pref_freq, int go)
1453 {
1454         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1455                 force_freq, pref_freq, go);
1456         if (force_freq || pref_freq) {
1457                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1458                     0)
1459                         return -1;
1460         } else {
1461                 p2p_prepare_channel_best(p2p);
1462         }
1463         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1464         if (go)
1465                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1466         else if (!force_freq)
1467                 p2p_channels_union_inplace(&p2p->channels,
1468                                            &p2p->cfg->cli_channels);
1469         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1470
1471         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1472                 p2p->op_reg_class, p2p->op_channel,
1473                 force_freq ? " (forced)" : "");
1474
1475         if (force_freq)
1476                 dev->flags |= P2P_DEV_FORCE_FREQ;
1477         else
1478                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1479
1480         return 0;
1481 }
1482
1483
1484 static void p2p_set_dev_persistent(struct p2p_device *dev,
1485                                    int persistent_group)
1486 {
1487         switch (persistent_group) {
1488         case 0:
1489                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1490                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1491                 break;
1492         case 1:
1493                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1494                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1495                 break;
1496         case 2:
1497                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1498                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1499                 break;
1500         }
1501 }
1502
1503
1504 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1505                 enum p2p_wps_method wps_method,
1506                 int go_intent, const u8 *own_interface_addr,
1507                 unsigned int force_freq, int persistent_group,
1508                 const u8 *force_ssid, size_t force_ssid_len,
1509                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1510 {
1511         struct p2p_device *dev;
1512
1513         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1514                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1515                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1516                 "oob_pw_id=%u",
1517                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1518                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1519
1520         dev = p2p_get_device(p2p, peer_addr);
1521         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1522                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1523                         MAC2STR(peer_addr));
1524                 return -1;
1525         }
1526
1527         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1528                                 go_intent == 15) < 0)
1529                 return -1;
1530
1531         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1532                 if (!(dev->info.dev_capab &
1533                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1534                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1535                                 " that is in a group and is not discoverable",
1536                                 MAC2STR(peer_addr));
1537                         return -1;
1538                 }
1539                 if (dev->oper_freq <= 0) {
1540                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1541                                 " with incomplete information",
1542                                 MAC2STR(peer_addr));
1543                         return -1;
1544                 }
1545
1546                 /*
1547                  * First, try to connect directly. If the peer does not
1548                  * acknowledge frames, assume it is sleeping and use device
1549                  * discoverability via the GO at that point.
1550                  */
1551         }
1552
1553         p2p->ssid_set = 0;
1554         if (force_ssid) {
1555                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1556                                   force_ssid, force_ssid_len);
1557                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1558                 p2p->ssid_len = force_ssid_len;
1559                 p2p->ssid_set = 1;
1560         }
1561
1562         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1563         dev->flags &= ~P2P_DEV_USER_REJECTED;
1564         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1565         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1566         if (pd_before_go_neg)
1567                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1568         else {
1569                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1570                 /*
1571                  * Assign dialog token and tie breaker here to use the same
1572                  * values in each retry within the same GO Negotiation exchange.
1573                  */
1574                 dev->dialog_token++;
1575                 if (dev->dialog_token == 0)
1576                         dev->dialog_token = 1;
1577                 dev->tie_breaker = p2p->next_tie_breaker;
1578                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1579         }
1580         dev->connect_reqs = 0;
1581         dev->go_neg_req_sent = 0;
1582         dev->go_state = UNKNOWN_GO;
1583         p2p_set_dev_persistent(dev, persistent_group);
1584         p2p->go_intent = go_intent;
1585         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1586
1587         if (p2p->state != P2P_IDLE)
1588                 p2p_stop_find(p2p);
1589
1590         if (p2p->after_scan_tx) {
1591                 /*
1592                  * We need to drop the pending frame to avoid issues with the
1593                  * new GO Negotiation, e.g., when the pending frame was from a
1594                  * previous attempt at starting a GO Negotiation.
1595                  */
1596                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1597                 os_free(p2p->after_scan_tx);
1598                 p2p->after_scan_tx = NULL;
1599         }
1600
1601         dev->wps_method = wps_method;
1602         dev->oob_pw_id = oob_pw_id;
1603         dev->status = P2P_SC_SUCCESS;
1604
1605         if (p2p->p2p_scan_running) {
1606                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1607                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1608                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1609                 return 0;
1610         }
1611         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1612
1613         return p2p_connect_send(p2p, dev);
1614 }
1615
1616
1617 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1618                   enum p2p_wps_method wps_method,
1619                   int go_intent, const u8 *own_interface_addr,
1620                   unsigned int force_freq, int persistent_group,
1621                   const u8 *force_ssid, size_t force_ssid_len,
1622                   unsigned int pref_freq, u16 oob_pw_id)
1623 {
1624         struct p2p_device *dev;
1625
1626         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1627                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1628                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1629                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1630                 wps_method, persistent_group, oob_pw_id);
1631
1632         dev = p2p_get_device(p2p, peer_addr);
1633         if (dev == NULL) {
1634                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1635                         MAC2STR(peer_addr));
1636                 return -1;
1637         }
1638
1639         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1640                                 15) < 0)
1641                 return -1;
1642
1643         p2p->ssid_set = 0;
1644         if (force_ssid) {
1645                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1646                                   force_ssid, force_ssid_len);
1647                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1648                 p2p->ssid_len = force_ssid_len;
1649                 p2p->ssid_set = 1;
1650         }
1651
1652         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1653         dev->flags &= ~P2P_DEV_USER_REJECTED;
1654         dev->go_neg_req_sent = 0;
1655         dev->go_state = UNKNOWN_GO;
1656         p2p_set_dev_persistent(dev, persistent_group);
1657         p2p->go_intent = go_intent;
1658         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1659
1660         dev->wps_method = wps_method;
1661         dev->oob_pw_id = oob_pw_id;
1662         dev->status = P2P_SC_SUCCESS;
1663
1664         return 0;
1665 }
1666
1667
1668 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1669                       struct p2p_device *dev, struct p2p_message *msg)
1670 {
1671         os_get_reltime(&dev->last_seen);
1672
1673         p2p_copy_wps_info(p2p, dev, 0, msg);
1674
1675         if (msg->listen_channel) {
1676                 int freq;
1677                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1678                                            msg->listen_channel[4]);
1679                 if (freq < 0) {
1680                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1681                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1682                                 msg->listen_channel[0],
1683                                 msg->listen_channel[1],
1684                                 msg->listen_channel[2],
1685                                 msg->listen_channel[3],
1686                                 msg->listen_channel[4]);
1687                 } else {
1688                         p2p_dbg(p2p, "Update peer " MACSTR
1689                                 " Listen channel: %u -> %u MHz",
1690                                 MAC2STR(dev->info.p2p_device_addr),
1691                                 dev->listen_freq, freq);
1692                         dev->listen_freq = freq;
1693                 }
1694         }
1695
1696         if (msg->wfd_subelems) {
1697                 wpabuf_free(dev->info.wfd_subelems);
1698                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1699         }
1700
1701         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1702                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1703                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1704         } else {
1705                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1706                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1707                         "listen_freq=%d",
1708                         MAC2STR(dev->info.p2p_device_addr),
1709                         dev->info.dev_capab, dev->info.group_capab,
1710                         dev->info.device_name, dev->listen_freq);
1711         }
1712
1713         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1714
1715         if (dev->flags & P2P_DEV_USER_REJECTED) {
1716                 p2p_dbg(p2p, "Do not report rejected device");
1717                 return;
1718         }
1719
1720         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1721                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1722         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1723 }
1724
1725
1726 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1727 {
1728         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1729         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1730         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1731                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1732         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1733 }
1734
1735
1736 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1737 {
1738         if (p2p->ssid_set) {
1739                 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1740                 params->ssid_len = p2p->ssid_len;
1741         } else {
1742                 p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1743         }
1744         p2p->ssid_set = 0;
1745
1746         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1747         return 0;
1748 }
1749
1750
1751 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1752 {
1753         struct p2p_go_neg_results res;
1754         int go = peer->go_state == LOCAL_GO;
1755         struct p2p_channels intersection;
1756
1757         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1758                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1759
1760         os_memset(&res, 0, sizeof(res));
1761         res.role_go = go;
1762         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1763         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1764         res.wps_method = peer->wps_method;
1765         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1766                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1767                         res.persistent_group = 2;
1768                 else
1769                         res.persistent_group = 1;
1770         }
1771
1772         if (go) {
1773                 /* Setup AP mode for WPS provisioning */
1774                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1775                                                p2p->op_channel);
1776                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1777                 res.ssid_len = p2p->ssid_len;
1778                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1779         } else {
1780                 res.freq = peer->oper_freq;
1781                 if (p2p->ssid_len) {
1782                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1783                         res.ssid_len = p2p->ssid_len;
1784                 }
1785         }
1786
1787         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1788         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1789         p2p_channels_intersect(&p2p->channels, &peer->channels,
1790                                &intersection);
1791         if (go) {
1792                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1793                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1794                                   &intersection);
1795         }
1796
1797         p2p_channels_to_freqs(&intersection, res.freq_list,
1798                               P2P_MAX_CHANNELS);
1799
1800         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1801
1802         p2p_clear_timeout(p2p);
1803         p2p->ssid_set = 0;
1804         peer->go_neg_req_sent = 0;
1805         peer->wps_method = WPS_NOT_READY;
1806         peer->oob_pw_id = 0;
1807         wpabuf_free(peer->go_neg_conf);
1808         peer->go_neg_conf = NULL;
1809
1810         p2p_set_state(p2p, P2P_PROVISIONING);
1811         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1812 }
1813
1814
1815 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1816                               const u8 *data, size_t len, int rx_freq)
1817 {
1818         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1819         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1820
1821         if (len < 1)
1822                 return;
1823
1824         switch (data[0]) {
1825         case P2P_GO_NEG_REQ:
1826                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1827                 break;
1828         case P2P_GO_NEG_RESP:
1829                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1830                 break;
1831         case P2P_GO_NEG_CONF:
1832                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1833                 break;
1834         case P2P_INVITATION_REQ:
1835                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1836                                            rx_freq);
1837                 break;
1838         case P2P_INVITATION_RESP:
1839                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1840                 break;
1841         case P2P_PROV_DISC_REQ:
1842                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1843                 break;
1844         case P2P_PROV_DISC_RESP:
1845                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1846                 break;
1847         case P2P_DEV_DISC_REQ:
1848                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1849                 break;
1850         case P2P_DEV_DISC_RESP:
1851                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1852                 break;
1853         default:
1854                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1855                         data[0]);
1856                 break;
1857         }
1858 }
1859
1860
1861 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1862                                  const u8 *sa, const u8 *bssid, const u8 *data,
1863                                  size_t len, int freq)
1864 {
1865         if (len < 1)
1866                 return;
1867
1868         switch (data[0]) {
1869         case WLAN_PA_VENDOR_SPECIFIC:
1870                 data++;
1871                 len--;
1872                 if (len < 4)
1873                         return;
1874                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1875                         return;
1876
1877                 data += 4;
1878                 len -= 4;
1879
1880                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1881                 break;
1882         case WLAN_PA_GAS_INITIAL_REQ:
1883                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1884                 break;
1885         case WLAN_PA_GAS_INITIAL_RESP:
1886                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1887                 break;
1888         case WLAN_PA_GAS_COMEBACK_REQ:
1889                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1890                 break;
1891         case WLAN_PA_GAS_COMEBACK_RESP:
1892                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1893                 break;
1894         }
1895 }
1896
1897
1898 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1899                    const u8 *bssid, u8 category,
1900                    const u8 *data, size_t len, int freq)
1901 {
1902         if (category == WLAN_ACTION_PUBLIC) {
1903                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1904                 return;
1905         }
1906
1907         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1908                 return;
1909
1910         if (len < 4)
1911                 return;
1912
1913         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1914                 return;
1915         data += 4;
1916         len -= 4;
1917
1918         /* P2P action frame */
1919         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1920         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1921
1922         if (len < 1)
1923                 return;
1924         switch (data[0]) {
1925         case P2P_NOA:
1926                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1927                 /* TODO */
1928                 break;
1929         case P2P_PRESENCE_REQ:
1930                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1931                 break;
1932         case P2P_PRESENCE_RESP:
1933                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1934                 break;
1935         case P2P_GO_DISC_REQ:
1936                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1937                 break;
1938         default:
1939                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1940                 break;
1941         }
1942 }
1943
1944
1945 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1946 {
1947         struct p2p_data *p2p = eloop_ctx;
1948         if (p2p->go_neg_peer == NULL)
1949                 return;
1950         if (p2p->pending_listen_freq) {
1951                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1952                 p2p->pending_listen_freq = 0;
1953         }
1954         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1955         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1956         /*
1957          * Set new timeout to make sure a previously set one does not expire
1958          * too quickly while waiting for the GO Negotiation to complete.
1959          */
1960         p2p_set_timeout(p2p, 0, 500000);
1961         p2p_connect_send(p2p, p2p->go_neg_peer);
1962 }
1963
1964
1965 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1966 {
1967         struct p2p_data *p2p = eloop_ctx;
1968         if (p2p->invite_peer == NULL)
1969                 return;
1970         if (p2p->pending_listen_freq) {
1971                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1972                 p2p->pending_listen_freq = 0;
1973         }
1974         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1975         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1976                         p2p->invite_dev_pw_id);
1977 }
1978
1979
1980 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1981                                        const u8 *ie, size_t ie_len)
1982 {
1983         struct p2p_message msg;
1984         struct p2p_device *dev;
1985
1986         os_memset(&msg, 0, sizeof(msg));
1987         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1988         {
1989                 p2p_parse_free(&msg);
1990                 return; /* not a P2P probe */
1991         }
1992
1993         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1994             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1995             != 0) {
1996                 /* The Probe Request is not part of P2P Device Discovery. It is
1997                  * not known whether the source address of the frame is the P2P
1998                  * Device Address or P2P Interface Address. Do not add a new
1999                  * peer entry based on this frames.
2000                  */
2001                 p2p_parse_free(&msg);
2002                 return;
2003         }
2004
2005         dev = p2p_get_device(p2p, addr);
2006         if (dev) {
2007                 if (dev->country[0] == 0 && msg.listen_channel)
2008                         os_memcpy(dev->country, msg.listen_channel, 3);
2009                 os_get_reltime(&dev->last_seen);
2010                 p2p_parse_free(&msg);
2011                 return; /* already known */
2012         }
2013
2014         dev = p2p_create_device(p2p, addr);
2015         if (dev == NULL) {
2016                 p2p_parse_free(&msg);
2017                 return;
2018         }
2019
2020         os_get_reltime(&dev->last_seen);
2021         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2022
2023         if (msg.listen_channel) {
2024                 os_memcpy(dev->country, msg.listen_channel, 3);
2025                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2026                                                        msg.listen_channel[4]);
2027         }
2028
2029         p2p_copy_wps_info(p2p, dev, 1, &msg);
2030
2031         if (msg.wfd_subelems) {
2032                 wpabuf_free(dev->info.wfd_subelems);
2033                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2034         }
2035
2036         p2p_parse_free(&msg);
2037
2038         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2039                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2040                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2041                 dev->info.group_capab, dev->info.device_name,
2042                 dev->listen_freq);
2043 }
2044
2045
2046 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2047                                                 const u8 *addr,
2048                                                 struct p2p_message *msg)
2049 {
2050         struct p2p_device *dev;
2051
2052         dev = p2p_get_device(p2p, addr);
2053         if (dev) {
2054                 os_get_reltime(&dev->last_seen);
2055                 return dev; /* already known */
2056         }
2057
2058         dev = p2p_create_device(p2p, addr);
2059         if (dev == NULL)
2060                 return NULL;
2061
2062         p2p_add_dev_info(p2p, addr, dev, msg);
2063
2064         return dev;
2065 }
2066
2067
2068 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2069 {
2070         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2071                 return 1;
2072         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2073             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2074             WPA_GET_BE16(&req_dev_type[6]) == 0)
2075                 return 1; /* Category match with wildcard OUI/sub-category */
2076         return 0;
2077 }
2078
2079
2080 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2081                         size_t num_req_dev_type)
2082 {
2083         size_t i;
2084         for (i = 0; i < num_req_dev_type; i++) {
2085                 if (dev_type_match(dev_type, req_dev_type[i]))
2086                         return 1;
2087         }
2088         return 0;
2089 }
2090
2091
2092 /**
2093  * p2p_match_dev_type - Match local device type with requested type
2094  * @p2p: P2P module context from p2p_init()
2095  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2096  * Returns: 1 on match, 0 on mismatch
2097  *
2098  * This function can be used to match the Requested Device Type attribute in
2099  * WPS IE with the local device types for deciding whether to reply to a Probe
2100  * Request frame.
2101  */
2102 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2103 {
2104         struct wps_parse_attr attr;
2105         size_t i;
2106
2107         if (wps_parse_msg(wps, &attr))
2108                 return 1; /* assume no Requested Device Type attributes */
2109
2110         if (attr.num_req_dev_type == 0)
2111                 return 1; /* no Requested Device Type attributes -> match */
2112
2113         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2114                                 attr.num_req_dev_type))
2115                 return 1; /* Own Primary Device Type matches */
2116
2117         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2118                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2119                                         attr.req_dev_type,
2120                                         attr.num_req_dev_type))
2121                         return 1; /* Own Secondary Device Type matches */
2122         }
2123
2124         /* No matching device type found */
2125         return 0;
2126 }
2127
2128
2129 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2130 {
2131         struct wpabuf *buf;
2132         u8 *len;
2133         int pw_id = -1;
2134         size_t extra = 0;
2135
2136 #ifdef CONFIG_WIFI_DISPLAY
2137         if (p2p->wfd_ie_probe_resp)
2138                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2139 #endif /* CONFIG_WIFI_DISPLAY */
2140
2141         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2142                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2143
2144         if (p2p->query_count)
2145                 extra += MAX_SVC_ADV_IE_LEN;
2146
2147         buf = wpabuf_alloc(1000 + extra);
2148         if (buf == NULL)
2149                 return NULL;
2150
2151         if (p2p->go_neg_peer) {
2152                 /* Advertise immediate availability of WPS credential */
2153                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2154         }
2155
2156         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2157                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2158                 wpabuf_free(buf);
2159                 return NULL;
2160         }
2161
2162 #ifdef CONFIG_WIFI_DISPLAY
2163         if (p2p->wfd_ie_probe_resp)
2164                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2165 #endif /* CONFIG_WIFI_DISPLAY */
2166
2167         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2168                 wpabuf_put_buf(buf,
2169                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2170
2171         /* P2P IE */
2172         len = p2p_buf_add_ie_hdr(buf);
2173         p2p_buf_add_capability(buf, p2p->dev_capab &
2174                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2175         if (p2p->ext_listen_interval)
2176                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2177                                               p2p->ext_listen_interval);
2178         p2p_buf_add_device_info(buf, p2p, NULL);
2179         p2p_buf_update_ie_hdr(buf, len);
2180
2181         if (p2p->query_count) {
2182                 p2p_buf_add_service_instance(buf, p2p, p2p->query_count,
2183                                              p2p->query_hash,
2184                                              p2p->p2ps_adv_list);
2185         }
2186
2187         return buf;
2188 }
2189
2190
2191 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2192 {
2193         struct p2ps_advertisement *adv_data;
2194
2195         p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2196
2197         /* Wildcard always matches if we have actual services */
2198         if (os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0)
2199                 return p2p->p2ps_adv_list != NULL;
2200
2201         adv_data = p2p->p2ps_adv_list;
2202         while (adv_data) {
2203                 p2p_dbg(p2p, "ASP hash: %x =? %x", hash[0], adv_data->hash[0]);
2204                 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2205                         return 1;
2206                 adv_data = adv_data->next;
2207         }
2208
2209         return 0;
2210 }
2211
2212
2213 static enum p2p_probe_req_status
2214 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2215                 const u8 *bssid, const u8 *ie, size_t ie_len)
2216 {
2217         struct ieee802_11_elems elems;
2218         struct wpabuf *buf;
2219         struct ieee80211_mgmt *resp;
2220         struct p2p_message msg;
2221         struct wpabuf *ies;
2222
2223         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2224             ParseFailed) {
2225                 /* Ignore invalid Probe Request frames */
2226                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2227                 return P2P_PREQ_MALFORMED;
2228         }
2229
2230         if (elems.p2p == NULL) {
2231                 /* not a P2P probe - ignore it */
2232                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2233                 return P2P_PREQ_NOT_P2P;
2234         }
2235
2236         if (dst && !is_broadcast_ether_addr(dst) &&
2237             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2238                 /* Not sent to the broadcast address or our P2P Device Address
2239                  */
2240                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2241                         MAC2STR(dst));
2242                 return P2P_PREQ_NOT_PROCESSED;
2243         }
2244
2245         if (bssid && !is_broadcast_ether_addr(bssid)) {
2246                 /* Not sent to the Wildcard BSSID */
2247                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2248                         MAC2STR(bssid));
2249                 return P2P_PREQ_NOT_PROCESSED;
2250         }
2251
2252         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2253             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2254             0) {
2255                 /* not using P2P Wildcard SSID - ignore */
2256                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2257                 return P2P_PREQ_NOT_PROCESSED;
2258         }
2259
2260         if (supp_rates_11b_only(&elems)) {
2261                 /* Indicates support for 11b rates only */
2262                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2263                 return P2P_PREQ_NOT_P2P;
2264         }
2265
2266         os_memset(&msg, 0, sizeof(msg));
2267         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2268                 /* Could not parse P2P attributes */
2269                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2270                 return P2P_PREQ_NOT_P2P;
2271         }
2272
2273         p2p->p2ps_svc_found = 0;
2274
2275         if (msg.service_hash && msg.service_hash_count) {
2276                 const u8 *hash = msg.service_hash;
2277                 u8 *dest = p2p->query_hash;
2278                 u8 i;
2279
2280                 p2p->query_count = 0;
2281                 for (i = 0; i < msg.service_hash_count; i++) {
2282                         if (p2p_service_find_asp(p2p, hash)) {
2283                                 p2p->p2ps_svc_found = 1;
2284
2285                                 if (!os_memcmp(hash, p2p->wild_card_hash,
2286                                                P2PS_HASH_LEN)) {
2287                                         /* We found match(es) but wildcard
2288                                          * will return all */
2289                                         p2p->query_count = 1;
2290                                         os_memcpy(p2p->query_hash, hash,
2291                                                   P2PS_HASH_LEN);
2292                                         break;
2293                                 }
2294
2295                                 /* Save each matching hash */
2296                                 if (p2p->query_count < P2P_MAX_QUERY_HASH) {
2297                                         os_memcpy(dest, hash, P2PS_HASH_LEN);
2298                                         dest += P2PS_HASH_LEN;
2299                                         p2p->query_count++;
2300                                 } else {
2301                                         /* We found match(es) but too many to
2302                                          * return all */
2303                                         p2p->query_count = 0;
2304                                         break;
2305                                 }
2306                         }
2307                         hash += P2PS_HASH_LEN;
2308                 }
2309
2310                 p2p_dbg(p2p, "ASP adv found: %d", p2p->p2ps_svc_found);
2311
2312                 /* Probed hash unknown */
2313                 if (!p2p->p2ps_svc_found) {
2314                         p2p_parse_free(&msg);
2315                         return P2P_PREQ_NOT_PROCESSED;
2316                 }
2317         } else {
2318                 /* This is not a P2PS Probe Request */
2319                 p2p->query_count = 0;
2320                 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2321
2322                 if (!p2p->in_listen || !p2p->drv_in_listen) {
2323                         /* not in Listen state - ignore Probe Request */
2324                         p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2325                                 p2p->in_listen, p2p->drv_in_listen);
2326                         p2p_parse_free(&msg);
2327                         return P2P_PREQ_NOT_LISTEN;
2328                 }
2329         }
2330
2331         if (msg.device_id &&
2332             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2333                 /* Device ID did not match */
2334                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2335                         MAC2STR(msg.device_id));
2336                 p2p_parse_free(&msg);
2337                 return P2P_PREQ_NOT_PROCESSED;
2338         }
2339
2340         /* Check Requested Device Type match */
2341         if (msg.wps_attributes &&
2342             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2343                 /* No match with Requested Device Type */
2344                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2345                 p2p_parse_free(&msg);
2346                 return P2P_PREQ_NOT_PROCESSED;
2347         }
2348         p2p_parse_free(&msg);
2349
2350         if (!p2p->cfg->send_probe_resp) {
2351                 /* Response generated elsewhere */
2352                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2353                 return P2P_PREQ_NOT_PROCESSED;
2354         }
2355
2356         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2357
2358         /*
2359          * We do not really have a specific BSS that this frame is advertising,
2360          * so build a frame that has some information in valid format. This is
2361          * really only used for discovery purposes, not to learn exact BSS
2362          * parameters.
2363          */
2364         ies = p2p_build_probe_resp_ies(p2p);
2365         if (ies == NULL)
2366                 return P2P_PREQ_NOT_PROCESSED;
2367
2368         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2369         if (buf == NULL) {
2370                 wpabuf_free(ies);
2371                 return P2P_PREQ_NOT_PROCESSED;
2372         }
2373
2374         resp = NULL;
2375         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2376
2377         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2378                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2379         os_memcpy(resp->da, addr, ETH_ALEN);
2380         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2381         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2382         resp->u.probe_resp.beacon_int = host_to_le16(100);
2383         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2384         resp->u.probe_resp.capab_info =
2385                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2386                              WLAN_CAPABILITY_PRIVACY |
2387                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2388
2389         wpabuf_put_u8(buf, WLAN_EID_SSID);
2390         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2391         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2392
2393         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2394         wpabuf_put_u8(buf, 8);
2395         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2396         wpabuf_put_u8(buf, 90 / 5);
2397         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2398         wpabuf_put_u8(buf, 180 / 5);
2399         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2400         wpabuf_put_u8(buf, 360 / 5);
2401         wpabuf_put_u8(buf, 480 / 5);
2402         wpabuf_put_u8(buf, 540 / 5);
2403
2404         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2405         wpabuf_put_u8(buf, 1);
2406         wpabuf_put_u8(buf, p2p->cfg->channel);
2407
2408         wpabuf_put_buf(buf, ies);
2409         wpabuf_free(ies);
2410
2411         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2412
2413         wpabuf_free(buf);
2414
2415         return P2P_PREQ_NOT_PROCESSED;
2416 }
2417
2418
2419 enum p2p_probe_req_status
2420 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2421                  const u8 *bssid, const u8 *ie, size_t ie_len)
2422 {
2423         enum p2p_probe_req_status res;
2424
2425         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2426
2427         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2428         p2p->query_count = 0;
2429
2430         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2431             p2p->go_neg_peer &&
2432             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2433             == 0 &&
2434             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2435                 /* Received a Probe Request from GO Negotiation peer */
2436                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2437                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2438                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2439                 return P2P_PREQ_PROCESSED;
2440         }
2441
2442         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2443             p2p->invite_peer &&
2444             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2445             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2446             == 0) {
2447                 /* Received a Probe Request from Invite peer */
2448                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2449                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2450                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2451                 return P2P_PREQ_PROCESSED;
2452         }
2453
2454         return res;
2455 }
2456
2457
2458 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2459                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2460 {
2461         struct wpabuf *tmp;
2462         u8 *lpos;
2463         size_t tmplen;
2464         int res;
2465         u8 group_capab;
2466
2467         if (p2p_ie == NULL)
2468                 return 0; /* WLAN AP is not a P2P manager */
2469
2470         /*
2471          * (Re)Association Request - P2P IE
2472          * P2P Capability attribute (shall be present)
2473          * P2P Interface attribute (present if concurrent device and
2474          *      P2P Management is enabled)
2475          */
2476         tmp = wpabuf_alloc(200);
2477         if (tmp == NULL)
2478                 return -1;
2479
2480         lpos = p2p_buf_add_ie_hdr(tmp);
2481         group_capab = 0;
2482         if (p2p->num_groups > 0) {
2483                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2484                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2485                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2486                     p2p->cross_connect)
2487                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2488         }
2489         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2490         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2491             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2492                 p2p_buf_add_p2p_interface(tmp, p2p);
2493         p2p_buf_update_ie_hdr(tmp, lpos);
2494
2495         tmplen = wpabuf_len(tmp);
2496         if (tmplen > len)
2497                 res = -1;
2498         else {
2499                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2500                 res = tmplen;
2501         }
2502         wpabuf_free(tmp);
2503
2504         return res;
2505 }
2506
2507
2508 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2509                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2510 {
2511         struct wpabuf *tmp;
2512         u8 *lpos;
2513         struct p2p_device *peer;
2514         size_t tmplen;
2515         int res;
2516         size_t extra = 0;
2517
2518         if (!p2p_group)
2519                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2520
2521 #ifdef CONFIG_WIFI_DISPLAY
2522         if (p2p->wfd_ie_assoc_req)
2523                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2524 #endif /* CONFIG_WIFI_DISPLAY */
2525
2526         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2527                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2528
2529         /*
2530          * (Re)Association Request - P2P IE
2531          * P2P Capability attribute (shall be present)
2532          * Extended Listen Timing (may be present)
2533          * P2P Device Info attribute (shall be present)
2534          */
2535         tmp = wpabuf_alloc(200 + extra);
2536         if (tmp == NULL)
2537                 return -1;
2538
2539 #ifdef CONFIG_WIFI_DISPLAY
2540         if (p2p->wfd_ie_assoc_req)
2541                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2542 #endif /* CONFIG_WIFI_DISPLAY */
2543
2544         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2545                 wpabuf_put_buf(tmp,
2546                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2547
2548         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2549
2550         lpos = p2p_buf_add_ie_hdr(tmp);
2551         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2552         if (p2p->ext_listen_interval)
2553                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2554                                               p2p->ext_listen_interval);
2555         p2p_buf_add_device_info(tmp, p2p, peer);
2556         p2p_buf_update_ie_hdr(tmp, lpos);
2557
2558         tmplen = wpabuf_len(tmp);
2559         if (tmplen > len)
2560                 res = -1;
2561         else {
2562                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2563                 res = tmplen;
2564         }
2565         wpabuf_free(tmp);
2566
2567         return res;
2568 }
2569
2570
2571 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2572 {
2573         struct wpabuf *p2p_ie;
2574         int ret;
2575
2576         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2577         if (p2p_ie == NULL)
2578                 return 0;
2579
2580         ret = p2p_attr_text(p2p_ie, buf, end);
2581         wpabuf_free(p2p_ie);
2582         return ret;
2583 }
2584
2585
2586 struct p2ps_advertisement *
2587 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2588 {
2589         struct p2ps_advertisement *adv_data;
2590
2591         if (!p2p)
2592                 return NULL;
2593
2594         adv_data = p2p->p2ps_adv_list;
2595         while (adv_data) {
2596                 if (adv_data->id == adv_id)
2597                         return adv_data;
2598                 adv_data = adv_data->next;
2599         }
2600
2601         return NULL;
2602 }
2603
2604
2605 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2606 {
2607         struct p2ps_advertisement *adv_data;
2608         struct p2ps_advertisement **prior;
2609
2610         if (!p2p)
2611                 return -1;
2612
2613         adv_data = p2p->p2ps_adv_list;
2614         prior = &p2p->p2ps_adv_list;
2615         while (adv_data) {
2616                 if (adv_data->id == adv_id) {
2617                         p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2618                         *prior = adv_data->next;
2619                         os_free(adv_data);
2620                         return 0;
2621                 }
2622                 prior = &adv_data->next;
2623                 adv_data = adv_data->next;
2624         }
2625
2626         return -1;
2627 }
2628
2629
2630 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2631                         const char *adv_str, u8 svc_state, u16 config_methods,
2632                         const char *svc_info)
2633 {
2634         struct p2ps_advertisement *adv_data, *tmp, **prev;
2635         u8 buf[P2PS_HASH_LEN];
2636         size_t adv_data_len, adv_len, info_len = 0;
2637
2638         if (!p2p || !adv_str || !adv_str[0])
2639                 return -1;
2640
2641         if (!(config_methods & p2p->cfg->config_methods)) {
2642                 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2643                         config_methods, p2p->cfg->config_methods);
2644                 return -1;
2645         }
2646
2647         if (!p2ps_gen_hash(p2p, adv_str, buf))
2648                 return -1;
2649
2650         if (svc_info)
2651                 info_len = os_strlen(svc_info);
2652         adv_len = os_strlen(adv_str);
2653         adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2654                 info_len + 1;
2655
2656         adv_data = os_zalloc(adv_data_len);
2657         if (!adv_data)
2658                 return -1;
2659
2660         os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2661         adv_data->id = adv_id;
2662         adv_data->state = svc_state;
2663         adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2664         adv_data->auto_accept = (u8) auto_accept;
2665         os_memcpy(adv_data->svc_name, adv_str, adv_len);
2666
2667         if (svc_info && info_len) {
2668                 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2669                 os_memcpy(adv_data->svc_info, svc_info, info_len);
2670         }
2671
2672         /*
2673          * Group Advertisements by service string. They do not need to be
2674          * sorted, but groups allow easier Probe Response instance grouping
2675          */
2676         tmp = p2p->p2ps_adv_list;
2677         prev = &p2p->p2ps_adv_list;
2678         while (tmp) {
2679                 if (tmp->id == adv_data->id) {
2680                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2681                                 os_free(adv_data);
2682                                 return -1;
2683                         }
2684                         adv_data->next = tmp->next;
2685                         *prev = adv_data;
2686                         os_free(tmp);
2687                         goto inserted;
2688                 } else {
2689                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2690                                 adv_data->next = tmp->next;
2691                                 tmp->next = adv_data;
2692                                 goto inserted;
2693                         }
2694                 }
2695                 prev = &tmp->next;
2696                 tmp = tmp->next;
2697         }
2698
2699         /* No svc_name match found */
2700         adv_data->next = p2p->p2ps_adv_list;
2701         p2p->p2ps_adv_list = adv_data;
2702
2703 inserted:
2704         p2p_dbg(p2p,
2705                 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'",
2706                 adv_id, adv_data->config_methods, svc_state, adv_str);
2707
2708         return 0;
2709 }
2710
2711
2712 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2713 {
2714         struct p2p_message msg;
2715
2716         os_memset(&msg, 0, sizeof(msg));
2717         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2718                 return -1;
2719
2720         if (msg.p2p_device_addr) {
2721                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2722                 return 0;
2723         } else if (msg.device_id) {
2724                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2725                 return 0;
2726         }
2727         return -1;
2728 }
2729
2730
2731 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2732 {
2733         struct wpabuf *p2p_ie;
2734         int ret;
2735
2736         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2737                                              P2P_IE_VENDOR_TYPE);
2738         if (p2p_ie == NULL)
2739                 return -1;
2740         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2741         wpabuf_free(p2p_ie);
2742         return ret;
2743 }
2744
2745
2746 static void p2p_clear_go_neg(struct p2p_data *p2p)
2747 {
2748         p2p->go_neg_peer = NULL;
2749         p2p_clear_timeout(p2p);
2750         p2p_set_state(p2p, P2P_IDLE);
2751 }
2752
2753
2754 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2755 {
2756         if (p2p->go_neg_peer == NULL) {
2757                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2758                 return; /* No pending Group Formation */
2759         }
2760
2761         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2762             0) {
2763                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2764                         MACSTR " (GO Negotiation peer " MACSTR ")",
2765                         MAC2STR(mac_addr),
2766                         MAC2STR(p2p->go_neg_peer->intended_addr));
2767                 return; /* Ignore unexpected peer address */
2768         }
2769
2770         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2771                 MAC2STR(mac_addr));
2772
2773         p2p_clear_go_neg(p2p);
2774 }
2775
2776
2777 void p2p_group_formation_failed(struct p2p_data *p2p)
2778 {
2779         if (p2p->go_neg_peer == NULL) {
2780                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2781                 return; /* No pending Group Formation */
2782         }
2783
2784         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2785                 MAC2STR(p2p->go_neg_peer->intended_addr));
2786
2787         p2p_clear_go_neg(p2p);
2788 }
2789
2790
2791 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2792 {
2793         struct p2p_data *p2p;
2794
2795         if (cfg->max_peers < 1 ||
2796             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2797                 return NULL;
2798
2799         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2800         if (p2p == NULL)
2801                 return NULL;
2802         p2p->cfg = (struct p2p_config *) (p2p + 1);
2803         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2804         if (cfg->dev_name)
2805                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2806         if (cfg->manufacturer)
2807                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2808         if (cfg->model_name)
2809                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2810         if (cfg->model_number)
2811                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2812         if (cfg->serial_number)
2813                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2814         if (cfg->pref_chan) {
2815                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2816                                                 sizeof(struct p2p_channel));
2817                 if (p2p->cfg->pref_chan) {
2818                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2819                                   cfg->num_pref_chan *
2820                                   sizeof(struct p2p_channel));
2821                 } else
2822                         p2p->cfg->num_pref_chan = 0;
2823         }
2824
2825         p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2826
2827         p2p->min_disc_int = 1;
2828         p2p->max_disc_int = 3;
2829         p2p->max_disc_tu = -1;
2830
2831         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2832                 p2p->next_tie_breaker = 0;
2833         p2p->next_tie_breaker &= 0x01;
2834         if (cfg->sd_request)
2835                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2836         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2837         if (cfg->concurrent_operations)
2838                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2839         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2840
2841         dl_list_init(&p2p->devices);
2842
2843         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2844                                p2p_expiration_timeout, p2p, NULL);
2845
2846         p2p->go_timeout = 100;
2847         p2p->client_timeout = 20;
2848         p2p->num_p2p_sd_queries = 0;
2849
2850         p2p_dbg(p2p, "initialized");
2851         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2852         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2853
2854         return p2p;
2855 }
2856
2857
2858 void p2p_deinit(struct p2p_data *p2p)
2859 {
2860         struct p2ps_advertisement *adv, *prev;
2861
2862 #ifdef CONFIG_WIFI_DISPLAY
2863         wpabuf_free(p2p->wfd_ie_beacon);
2864         wpabuf_free(p2p->wfd_ie_probe_req);
2865         wpabuf_free(p2p->wfd_ie_probe_resp);
2866         wpabuf_free(p2p->wfd_ie_assoc_req);
2867         wpabuf_free(p2p->wfd_ie_invitation);
2868         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2869         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2870         wpabuf_free(p2p->wfd_ie_go_neg);
2871         wpabuf_free(p2p->wfd_dev_info);
2872         wpabuf_free(p2p->wfd_assoc_bssid);
2873         wpabuf_free(p2p->wfd_coupled_sink_info);
2874 #endif /* CONFIG_WIFI_DISPLAY */
2875
2876         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2877         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2878         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2879         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2880         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2881         p2p_flush(p2p);
2882         p2p_free_req_dev_types(p2p);
2883         os_free(p2p->cfg->dev_name);
2884         os_free(p2p->cfg->manufacturer);
2885         os_free(p2p->cfg->model_name);
2886         os_free(p2p->cfg->model_number);
2887         os_free(p2p->cfg->serial_number);
2888         os_free(p2p->cfg->pref_chan);
2889         os_free(p2p->groups);
2890         wpabuf_free(p2p->sd_resp);
2891         os_free(p2p->after_scan_tx);
2892         p2p_remove_wps_vendor_extensions(p2p);
2893         os_free(p2p->no_go_freq.range);
2894
2895         adv = p2p->p2ps_adv_list;
2896         while (adv) {
2897                 prev = adv;
2898                 adv = adv->next;
2899                 os_free(prev);
2900         }
2901
2902         os_free(p2p);
2903 }
2904
2905
2906 void p2p_flush(struct p2p_data *p2p)
2907 {
2908         struct p2p_device *dev, *prev;
2909         p2p_stop_find(p2p);
2910         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2911                               list) {
2912                 dl_list_del(&dev->list);
2913                 p2p_device_free(p2p, dev);
2914         }
2915         p2p_free_sd_queries(p2p);
2916         os_free(p2p->after_scan_tx);
2917         p2p->after_scan_tx = NULL;
2918 }
2919
2920
2921 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2922 {
2923         struct p2p_device *dev;
2924
2925         dev = p2p_get_device(p2p, addr);
2926         if (dev == NULL)
2927                 return -1;
2928
2929         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2930
2931         if (p2p->go_neg_peer == dev) {
2932                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2933                 p2p->go_neg_peer = NULL;
2934         }
2935
2936         dev->wps_method = WPS_NOT_READY;
2937         dev->oob_pw_id = 0;
2938         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2939         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2940
2941         /* Check if after_scan_tx is for this peer. If so free it */
2942         if (p2p->after_scan_tx &&
2943             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2944                 os_free(p2p->after_scan_tx);
2945                 p2p->after_scan_tx = NULL;
2946         }
2947
2948         return 0;
2949 }
2950
2951
2952 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2953 {
2954         os_free(p2p->cfg->dev_name);
2955         if (dev_name) {
2956                 p2p->cfg->dev_name = os_strdup(dev_name);
2957                 if (p2p->cfg->dev_name == NULL)
2958                         return -1;
2959         } else
2960                 p2p->cfg->dev_name = NULL;
2961         return 0;
2962 }
2963
2964
2965 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2966 {
2967         os_free(p2p->cfg->manufacturer);
2968         p2p->cfg->manufacturer = NULL;
2969         if (manufacturer) {
2970                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2971                 if (p2p->cfg->manufacturer == NULL)
2972                         return -1;
2973         }
2974
2975         return 0;
2976 }
2977
2978
2979 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2980 {
2981         os_free(p2p->cfg->model_name);
2982         p2p->cfg->model_name = NULL;
2983         if (model_name) {
2984                 p2p->cfg->model_name = os_strdup(model_name);
2985                 if (p2p->cfg->model_name == NULL)
2986                         return -1;
2987         }
2988
2989         return 0;
2990 }
2991
2992
2993 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2994 {
2995         os_free(p2p->cfg->model_number);
2996         p2p->cfg->model_number = NULL;
2997         if (model_number) {
2998                 p2p->cfg->model_number = os_strdup(model_number);
2999                 if (p2p->cfg->model_number == NULL)
3000                         return -1;
3001         }
3002
3003         return 0;
3004 }
3005
3006
3007 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3008 {
3009         os_free(p2p->cfg->serial_number);
3010         p2p->cfg->serial_number = NULL;
3011         if (serial_number) {
3012                 p2p->cfg->serial_number = os_strdup(serial_number);
3013                 if (p2p->cfg->serial_number == NULL)
3014                         return -1;
3015         }
3016
3017         return 0;
3018 }
3019
3020
3021 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3022 {
3023         p2p->cfg->config_methods = config_methods;
3024 }
3025
3026
3027 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3028 {
3029         os_memcpy(p2p->cfg->uuid, uuid, 16);
3030 }
3031
3032
3033 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3034 {
3035         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3036         return 0;
3037 }
3038
3039
3040 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3041                           size_t num_dev_types)
3042 {
3043         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3044                 num_dev_types = P2P_SEC_DEVICE_TYPES;
3045         p2p->cfg->num_sec_dev_types = num_dev_types;
3046         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3047         return 0;
3048 }
3049
3050
3051 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3052 {
3053         int i;
3054
3055         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3056                 wpabuf_free(p2p->wps_vendor_ext[i]);
3057                 p2p->wps_vendor_ext[i] = NULL;
3058         }
3059 }
3060
3061
3062 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3063                                  const struct wpabuf *vendor_ext)
3064 {
3065         int i;
3066
3067         if (vendor_ext == NULL)
3068                 return -1;
3069
3070         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3071                 if (p2p->wps_vendor_ext[i] == NULL)
3072                         break;
3073         }
3074         if (i >= P2P_MAX_WPS_VENDOR_EXT)
3075                 return -1;
3076
3077         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3078         if (p2p->wps_vendor_ext[i] == NULL)
3079                 return -1;
3080
3081         return 0;
3082 }
3083
3084
3085 int p2p_set_country(struct p2p_data *p2p, const char *country)
3086 {
3087         os_memcpy(p2p->cfg->country, country, 3);
3088         return 0;
3089 }
3090
3091
3092 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3093 {
3094         if (dev->sd_pending_bcast_queries == 0) {
3095                 /* Initialize with total number of registered broadcast
3096                  * SD queries. */
3097                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3098         }
3099
3100         if (p2p_start_sd(p2p, dev) == 0)
3101                 return 1;
3102
3103         if (dev->req_config_methods &&
3104             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3105                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3106                         MACSTR " (config methods 0x%x)",
3107                         MAC2STR(dev->info.p2p_device_addr),
3108                         dev->req_config_methods);
3109                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3110                         return 1;
3111         }
3112
3113         return 0;
3114 }
3115
3116
3117 void p2p_continue_find(struct p2p_data *p2p)
3118 {
3119         struct p2p_device *dev;
3120         int found;
3121
3122         p2p_set_state(p2p, P2P_SEARCH);
3123
3124         /* Continue from the device following the last iteration */
3125         found = 0;
3126         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3127                 if (dev == p2p->last_p2p_find_oper) {
3128                         found = 1;
3129                         continue;
3130                 }
3131                 if (!found)
3132                         continue;
3133                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3134                         p2p->last_p2p_find_oper = dev;
3135                         return;
3136                 }
3137         }
3138
3139         /*
3140          * Wrap around to the beginning of the list and continue until the last
3141          * iteration device.
3142          */
3143         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3144                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3145                         p2p->last_p2p_find_oper = dev;
3146                         return;
3147                 }
3148                 if (dev == p2p->last_p2p_find_oper)
3149                         break;
3150         }
3151
3152         p2p_listen_in_find(p2p, 1);
3153 }
3154
3155
3156 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3157 {
3158         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3159                 success);
3160         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3161
3162         if (!success) {
3163                 if (p2p->sd_peer)
3164                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3165                 p2p->sd_peer = NULL;
3166                 p2p_continue_find(p2p);
3167                 return;
3168         }
3169
3170         if (p2p->sd_peer == NULL) {
3171                 p2p_dbg(p2p, "No SD peer entry known");
3172                 p2p_continue_find(p2p);
3173                 return;
3174         }
3175
3176         if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3177                 /* Update the pending broadcast SD query count for this device
3178                  */
3179                 p2p->sd_peer->sd_pending_bcast_queries--;
3180
3181                 /*
3182                  * If there are no pending broadcast queries for this device,
3183                  * mark it as done (-1).
3184                  */
3185                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3186                         p2p->sd_peer->sd_pending_bcast_queries = -1;
3187         }
3188
3189         /* Wait for response from the peer */
3190         p2p_set_state(p2p, P2P_SD_DURING_FIND);
3191         p2p_set_timeout(p2p, 0, 200000);
3192 }
3193
3194
3195 /**
3196  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3197  * @p2p: P2P module context from p2p_init()
3198  */
3199 static void p2p_retry_pd(struct p2p_data *p2p)
3200 {
3201         struct p2p_device *dev;
3202
3203         if (p2p->state != P2P_IDLE)
3204                 return;
3205
3206         /*
3207          * Retry the prov disc req attempt only for the peer that the user had
3208          * requested.
3209          */
3210
3211         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3212                 if (os_memcmp(p2p->pending_pd_devaddr,
3213                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
3214                         continue;
3215                 if (!dev->req_config_methods)
3216                         continue;
3217
3218                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3219                         MACSTR " (config methods 0x%x)",
3220                         MAC2STR(dev->info.p2p_device_addr),
3221                         dev->req_config_methods);
3222                 p2p_send_prov_disc_req(p2p, dev,
3223                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
3224                                        p2p->pd_force_freq);
3225                 return;
3226         }
3227 }
3228
3229
3230 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3231 {
3232         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3233                 success);
3234
3235         /*
3236          * Postpone resetting the pending action state till after we actually
3237          * time out. This allows us to take some action like notifying any
3238          * interested parties about no response to the request.
3239          *
3240          * When the timer (below) goes off we check in IDLE, SEARCH, or
3241          * LISTEN_ONLY state, which are the only allowed states to issue a PD
3242          * requests in, if this was still pending and then raise notification.
3243          */
3244
3245         if (!success) {
3246                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3247
3248                 if (p2p->user_initiated_pd &&
3249                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3250                 {
3251                         /* Retry request from timeout to avoid busy loops */
3252                         p2p->pending_action_state = P2P_PENDING_PD;
3253                         p2p_set_timeout(p2p, 0, 50000);
3254                 } else if (p2p->state != P2P_IDLE)
3255                         p2p_continue_find(p2p);
3256                 else if (p2p->user_initiated_pd) {
3257                         p2p->pending_action_state = P2P_PENDING_PD;
3258                         p2p_set_timeout(p2p, 0, 300000);
3259                 }
3260                 return;
3261         }
3262
3263         /*
3264          * This postponing, of resetting pending_action_state, needs to be
3265          * done only for user initiated PD requests and not internal ones.
3266          */
3267         if (p2p->user_initiated_pd)
3268                 p2p->pending_action_state = P2P_PENDING_PD;
3269         else
3270                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3271
3272         /* Wait for response from the peer */
3273         if (p2p->state == P2P_SEARCH)
3274                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3275         p2p_set_timeout(p2p, 0, 200000);
3276 }
3277
3278
3279 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3280                          struct os_reltime *rx_time, int level, const u8 *ies,
3281                          size_t ies_len)
3282 {
3283         if (os_reltime_before(rx_time, &p2p->find_start)) {
3284                 /*
3285                  * The driver may have cached (e.g., in cfg80211 BSS table) the
3286                  * scan results for relatively long time. To avoid reporting
3287                  * stale information, update P2P peers only based on results
3288                  * that have based on frames received after the last p2p_find
3289                  * operation was started.
3290                  */
3291                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3292                         " (rx_time=%u.%06u)",
3293                         MAC2STR(bssid), (unsigned int) rx_time->sec,
3294                         (unsigned int) rx_time->usec);
3295                 return 0;
3296         }
3297
3298         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3299
3300         return 0;
3301 }
3302
3303
3304 void p2p_scan_res_handled(struct p2p_data *p2p)
3305 {
3306         if (!p2p->p2p_scan_running) {
3307                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3308         }
3309         p2p->p2p_scan_running = 0;
3310         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3311
3312         if (p2p_run_after_scan(p2p))
3313                 return;
3314         if (p2p->state == P2P_SEARCH)
3315                 p2p_continue_find(p2p);
3316 }
3317
3318
3319 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3320 {
3321         u8 dev_capab;
3322         u8 *len;
3323
3324 #ifdef CONFIG_WIFI_DISPLAY
3325         if (p2p->wfd_ie_probe_req)
3326                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3327 #endif /* CONFIG_WIFI_DISPLAY */
3328
3329         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3330                 wpabuf_put_buf(ies,
3331                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3332
3333         len = p2p_buf_add_ie_hdr(ies);
3334
3335         dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3336
3337         /* P2PS requires Probe Request frames to include SD bit */
3338         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3339                 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3340
3341         p2p_buf_add_capability(ies, dev_capab, 0);
3342
3343         if (dev_id)
3344                 p2p_buf_add_device_id(ies, dev_id);
3345         if (p2p->cfg->reg_class && p2p->cfg->channel)
3346                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3347                                            p2p->cfg->reg_class,
3348                                            p2p->cfg->channel);
3349         if (p2p->ext_listen_interval)
3350                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3351                                               p2p->ext_listen_interval);
3352
3353         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3354                 p2p_buf_add_service_hash(ies, p2p);
3355
3356         /* TODO: p2p_buf_add_operating_channel() if GO */
3357         p2p_buf_update_ie_hdr(ies, len);
3358 }
3359
3360
3361 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3362 {
3363         size_t len = 100;
3364
3365 #ifdef CONFIG_WIFI_DISPLAY
3366         if (p2p && p2p->wfd_ie_probe_req)
3367                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3368 #endif /* CONFIG_WIFI_DISPLAY */
3369
3370         if (p2p && p2p->vendor_elem &&
3371             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3372                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3373
3374         return len;
3375 }
3376
3377
3378 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3379 {
3380         return p2p_attr_text(p2p_ie, buf, end);
3381 }
3382
3383
3384 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3385 {
3386         struct p2p_device *dev = p2p->go_neg_peer;
3387         int timeout;
3388
3389         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3390
3391         if (dev == NULL) {
3392                 p2p_dbg(p2p, "No pending GO Negotiation");
3393                 return;
3394         }
3395
3396         if (success) {
3397                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3398                         p2p_set_state(p2p, P2P_IDLE);
3399                         return;
3400                 }
3401         } else if (dev->go_neg_req_sent) {
3402                 /* Cancel the increment from p2p_connect_send() on failure */
3403                 dev->go_neg_req_sent--;
3404         }
3405
3406         if (!success &&
3407             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3408             !is_zero_ether_addr(dev->member_in_go_dev)) {
3409                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3410                         MAC2STR(dev->info.p2p_device_addr));
3411                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3412                 p2p_send_dev_disc_req(p2p, dev);
3413                 return;
3414         }
3415
3416         /*
3417          * Use P2P find, if needed, to find the other device from its listen
3418          * channel.
3419          */
3420         p2p_set_state(p2p, P2P_CONNECT);
3421         timeout = success ? 500000 : 100000;
3422         if (!success && p2p->go_neg_peer &&
3423             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3424                 unsigned int r;
3425                 /*
3426                  * Peer is expected to wait our response and we will skip the
3427                  * listen phase. Add some randomness to the wait time here to
3428                  * make it less likely to hit cases where we could end up in
3429                  * sync with peer not listening.
3430                  */
3431                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3432                         r = 0;
3433                 timeout += r % 100000;
3434         }
3435         p2p_set_timeout(p2p, 0, timeout);
3436 }
3437
3438
3439 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3440 {
3441         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3442                 success);
3443         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3444                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3445                 return;
3446         }
3447         p2p_set_state(p2p, P2P_CONNECT);
3448         p2p_set_timeout(p2p, 0, 500000);
3449 }
3450
3451
3452 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3453                                        const u8 *addr)
3454 {
3455         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3456         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3457                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3458         } else if (success) {
3459                 struct p2p_device *dev;
3460                 dev = p2p_get_device(p2p, addr);
3461                 if (dev &&
3462                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3463                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3464         }
3465 }
3466
3467
3468 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3469                                enum p2p_send_action_result result)
3470 {
3471         struct p2p_device *dev;
3472
3473         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3474         if (result == P2P_SEND_ACTION_FAILED) {
3475                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3476                 p2p_go_neg_failed(p2p, -1);
3477                 return;
3478         }
3479
3480         dev = p2p->go_neg_peer;
3481
3482         if (result == P2P_SEND_ACTION_NO_ACK) {
3483                 /*
3484                  * Retry GO Negotiation Confirmation
3485                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3486                  * ACK for confirmation.
3487                  */
3488                 if (dev && dev->go_neg_conf &&
3489                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3490                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3491                                 dev->go_neg_conf_sent);
3492                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3493                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3494                                             dev->info.p2p_device_addr,
3495                                             p2p->cfg->dev_addr,
3496                                             dev->info.p2p_device_addr,
3497                                             wpabuf_head(dev->go_neg_conf),
3498                                             wpabuf_len(dev->go_neg_conf), 0) >=
3499                             0) {
3500                                 dev->go_neg_conf_sent++;
3501                                 return;
3502                         }
3503                         p2p_dbg(p2p, "Failed to re-send Action frame");
3504
3505                         /*
3506                          * Continue with the assumption that the first attempt
3507                          * went through and just the ACK frame was lost.
3508                          */
3509                 }
3510
3511                 /*
3512                  * It looks like the TX status for GO Negotiation Confirm is
3513                  * often showing failure even when the peer has actually
3514                  * received the frame. Since the peer may change channels
3515                  * immediately after having received the frame, we may not see
3516                  * an Ack for retries, so just dropping a single frame may
3517                  * trigger this. To allow the group formation to succeed if the
3518                  * peer did indeed receive the frame, continue regardless of
3519                  * the TX status.
3520                  */
3521                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3522         }
3523
3524         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3525
3526         if (dev == NULL)
3527                 return;
3528
3529         p2p_go_complete(p2p, dev);
3530 }
3531
3532
3533 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3534                         const u8 *src, const u8 *bssid,
3535                         enum p2p_send_action_result result)
3536 {
3537         enum p2p_pending_action_state state;
3538         int success;
3539
3540         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3541                 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3542                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3543                 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3544         success = result == P2P_SEND_ACTION_SUCCESS;
3545         state = p2p->pending_action_state;
3546         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3547         switch (state) {
3548         case P2P_NO_PENDING_ACTION:
3549                 if (p2p->send_action_in_progress) {
3550                         p2p->send_action_in_progress = 0;
3551                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3552                 }
3553                 if (p2p->after_scan_tx_in_progress) {
3554                         p2p->after_scan_tx_in_progress = 0;
3555                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3556                             p2p_run_after_scan(p2p))
3557                                 break;
3558                         if (p2p->state == P2P_SEARCH) {
3559                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3560                                 p2p_continue_find(p2p);
3561                         }
3562                 }
3563                 break;
3564         case P2P_PENDING_GO_NEG_REQUEST:
3565                 p2p_go_neg_req_cb(p2p, success);
3566                 break;
3567         case P2P_PENDING_GO_NEG_RESPONSE:
3568                 p2p_go_neg_resp_cb(p2p, success);
3569                 break;
3570         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3571                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3572                 break;
3573         case P2P_PENDING_GO_NEG_CONFIRM:
3574                 p2p_go_neg_conf_cb(p2p, result);
3575                 break;
3576         case P2P_PENDING_SD:
3577                 p2p_sd_cb(p2p, success);
3578                 break;
3579         case P2P_PENDING_PD:
3580                 p2p_prov_disc_cb(p2p, success);
3581                 break;
3582         case P2P_PENDING_INVITATION_REQUEST:
3583                 p2p_invitation_req_cb(p2p, success);
3584                 break;
3585         case P2P_PENDING_INVITATION_RESPONSE:
3586                 p2p_invitation_resp_cb(p2p, success);
3587                 break;
3588         case P2P_PENDING_DEV_DISC_REQUEST:
3589                 p2p_dev_disc_req_cb(p2p, success);
3590                 break;
3591         case P2P_PENDING_DEV_DISC_RESPONSE:
3592                 p2p_dev_disc_resp_cb(p2p, success);
3593                 break;
3594         case P2P_PENDING_GO_DISC_REQ:
3595                 p2p_go_disc_req_cb(p2p, success);
3596                 break;
3597         }
3598
3599         p2p->after_scan_tx_in_progress = 0;
3600 }
3601
3602
3603 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3604                    unsigned int duration)
3605 {
3606         if (freq == p2p->pending_client_disc_freq) {
3607                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3608                 p2p->pending_client_disc_freq = 0;
3609                 return;
3610         }
3611
3612         if (freq != p2p->pending_listen_freq) {
3613                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3614                         freq, duration, p2p->pending_listen_freq);
3615                 return;
3616         }
3617
3618         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3619                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3620                 p2p->pending_listen_freq);
3621         p2p->in_listen = 1;
3622         p2p->drv_in_listen = freq;
3623         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3624                 /*
3625                  * Add 20 msec extra wait to avoid race condition with driver
3626                  * remain-on-channel end event, i.e., give driver more time to
3627                  * complete the operation before our timeout expires.
3628                  */
3629                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3630                                 p2p->pending_listen_usec + 20000);
3631         }
3632
3633         p2p->pending_listen_freq = 0;
3634 }
3635
3636
3637 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3638 {
3639         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3640         p2p->drv_in_listen = 0;
3641         if (p2p->in_listen)
3642                 return 0; /* Internal timeout will trigger the next step */
3643
3644         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3645                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3646                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3647                         p2p_go_neg_failed(p2p, -1);
3648                         return 0;
3649                 }
3650
3651                 p2p_set_state(p2p, P2P_CONNECT);
3652                 p2p_connect_send(p2p, p2p->go_neg_peer);
3653                 return 1;
3654         } else if (p2p->state == P2P_SEARCH) {
3655                 if (p2p->p2p_scan_running) {
3656                          /*
3657                           * Search is already in progress. This can happen if
3658                           * an Action frame RX is reported immediately after
3659                           * the end of a remain-on-channel operation and the
3660                           * response frame to that is sent using an offchannel
3661                           * operation while in p2p_find. Avoid an attempt to
3662                           * restart a scan here.
3663                           */
3664                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3665                         return 1;
3666                 }
3667                 if (p2p->pending_listen_freq) {
3668                         /*
3669                          * Better wait a bit if the driver is unable to start
3670                          * offchannel operation for some reason. p2p_search()
3671                          * will be started from internal timeout.
3672                          */
3673                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3674                         p2p_set_timeout(p2p, 0, 100000);
3675                         return 1;
3676                 }
3677                 if (p2p->search_delay) {
3678                         p2p_dbg(p2p, "Delay search operation by %u ms",
3679                                 p2p->search_delay);
3680                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3681                                         (p2p->search_delay % 1000) * 1000);
3682                         return 1;
3683                 }
3684                 p2p_search(p2p);
3685                 return 1;
3686         }
3687
3688         return 0;
3689 }
3690
3691
3692 static void p2p_timeout_connect(struct p2p_data *p2p)
3693 {
3694         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3695         if (p2p->go_neg_peer &&
3696             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3697                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3698                 p2p_go_neg_failed(p2p, -1);
3699                 return;
3700         }
3701         if (p2p->go_neg_peer &&
3702             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3703             p2p->go_neg_peer->connect_reqs < 120) {
3704                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3705                 p2p_connect_send(p2p, p2p->go_neg_peer);
3706                 return;
3707         }
3708         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3709                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3710                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3711                 p2p_set_timeout(p2p, 0, 30000);
3712                 return;
3713         }
3714         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3715         p2p_listen_in_find(p2p, 0);
3716 }
3717
3718
3719 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3720 {
3721         if (p2p->go_neg_peer) {
3722                 if (p2p->drv_in_listen) {
3723                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3724                         return;
3725                 }
3726
3727                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3728                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3729                         p2p_go_neg_failed(p2p, -1);
3730                         return;
3731                 }
3732
3733                 p2p_set_state(p2p, P2P_CONNECT);
3734                 p2p_connect_send(p2p, p2p->go_neg_peer);
3735         } else
3736                 p2p_set_state(p2p, P2P_IDLE);
3737 }
3738
3739
3740 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3741 {
3742         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3743
3744         if (p2p->cfg->is_concurrent_session_active &&
3745             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3746                 p2p_set_timeout(p2p, 0, 500000);
3747         else
3748                 p2p_set_timeout(p2p, 0, 200000);
3749 }
3750
3751
3752 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3753 {
3754         struct p2p_device *dev = p2p->go_neg_peer;
3755
3756         if (dev == NULL) {
3757                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3758                 return;
3759         }
3760
3761         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3762         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3763         p2p_listen_in_find(p2p, 0);
3764 }
3765
3766
3767 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3768 {
3769         p2p_dbg(p2p, "Service Discovery Query timeout");
3770         if (p2p->sd_peer) {
3771                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3772                 p2p->sd_peer = NULL;
3773         }
3774         p2p_continue_find(p2p);
3775 }
3776
3777
3778 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3779 {
3780         p2p_dbg(p2p, "Provision Discovery Request timeout");
3781         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3782         p2p_continue_find(p2p);
3783 }
3784
3785
3786 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3787 {
3788         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3789
3790         /*
3791          * For user initiated PD requests that we have not gotten any responses
3792          * for while in IDLE state, we retry them a couple of times before
3793          * giving up.
3794          */
3795         if (!p2p->user_initiated_pd)
3796                 return;
3797
3798         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3799
3800         if (p2p->pd_retries) {
3801                 p2p->pd_retries--;
3802                 p2p_retry_pd(p2p);
3803         } else {
3804                 struct p2p_device *dev;
3805                 int for_join = 0;
3806
3807                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3808                         if (os_memcmp(p2p->pending_pd_devaddr,
3809                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3810                                 continue;
3811                         if (dev->req_config_methods &&
3812                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3813                                 for_join = 1;
3814                 }
3815
3816                 if (p2p->cfg->prov_disc_fail)
3817                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3818                                                  p2p->pending_pd_devaddr,
3819                                                  for_join ?
3820                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3821                                                  P2P_PROV_DISC_TIMEOUT);
3822                 p2p_reset_pending_pd(p2p);
3823         }
3824 }
3825
3826
3827 static void p2p_timeout_invite(struct p2p_data *p2p)
3828 {
3829         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3830         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3831         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3832                 /*
3833                  * Better remain on operating channel instead of listen channel
3834                  * when running a group.
3835                  */
3836                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3837                 p2p_set_timeout(p2p, 0, 100000);
3838                 return;
3839         }
3840         p2p_listen_in_find(p2p, 0);
3841 }
3842
3843
3844 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3845 {
3846         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3847                 p2p_set_state(p2p, P2P_INVITE);
3848                 p2p_invite_send(p2p, p2p->invite_peer,
3849                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3850         } else {
3851                 if (p2p->invite_peer) {
3852                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3853                         if (p2p->cfg->invitation_result)
3854                                 p2p->cfg->invitation_result(
3855                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3856                                         p2p->invite_peer->info.p2p_device_addr,
3857                                         0, 0);
3858                 }
3859                 p2p_set_state(p2p, P2P_IDLE);
3860         }
3861 }
3862
3863
3864 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3865 {
3866         struct p2p_data *p2p = eloop_ctx;
3867
3868         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3869
3870         p2p->in_listen = 0;
3871         if (p2p->drv_in_listen) {
3872                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3873                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3874         }
3875
3876         switch (p2p->state) {
3877         case P2P_IDLE:
3878                 /* Check if we timed out waiting for PD req */
3879                 if (p2p->pending_action_state == P2P_PENDING_PD)
3880                         p2p_timeout_prov_disc_req(p2p);
3881                 break;
3882         case P2P_SEARCH:
3883                 /* Check if we timed out waiting for PD req */
3884                 if (p2p->pending_action_state == P2P_PENDING_PD)
3885                         p2p_timeout_prov_disc_req(p2p);
3886                 if (p2p->search_delay && !p2p->in_search_delay) {
3887                         p2p_dbg(p2p, "Delay search operation by %u ms",
3888                                 p2p->search_delay);
3889                         p2p->in_search_delay = 1;
3890                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3891                                         (p2p->search_delay % 1000) * 1000);
3892                         break;
3893                 }
3894                 p2p->in_search_delay = 0;
3895                 p2p_search(p2p);
3896                 break;
3897         case P2P_CONNECT:
3898                 p2p_timeout_connect(p2p);
3899                 break;
3900         case P2P_CONNECT_LISTEN:
3901                 p2p_timeout_connect_listen(p2p);
3902                 break;
3903         case P2P_GO_NEG:
3904                 break;
3905         case P2P_LISTEN_ONLY:
3906                 /* Check if we timed out waiting for PD req */
3907                 if (p2p->pending_action_state == P2P_PENDING_PD)
3908                         p2p_timeout_prov_disc_req(p2p);
3909
3910                 if (p2p->ext_listen_only) {
3911                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3912                         p2p->ext_listen_only = 0;
3913                         p2p_set_state(p2p, P2P_IDLE);
3914                 }
3915                 break;
3916         case P2P_WAIT_PEER_CONNECT:
3917                 p2p_timeout_wait_peer_connect(p2p);
3918                 break;
3919         case P2P_WAIT_PEER_IDLE:
3920                 p2p_timeout_wait_peer_idle(p2p);
3921                 break;
3922         case P2P_SD_DURING_FIND:
3923                 p2p_timeout_sd_during_find(p2p);
3924                 break;
3925         case P2P_PROVISIONING:
3926                 break;
3927         case P2P_PD_DURING_FIND:
3928                 p2p_timeout_prov_disc_during_find(p2p);
3929                 break;
3930         case P2P_INVITE:
3931                 p2p_timeout_invite(p2p);
3932                 break;
3933         case P2P_INVITE_LISTEN:
3934                 p2p_timeout_invite_listen(p2p);
3935                 break;
3936         }
3937 }
3938
3939
3940 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3941 {
3942         struct p2p_device *dev;
3943
3944         dev = p2p_get_device(p2p, peer_addr);
3945         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3946                 MACSTR, MAC2STR(peer_addr));
3947         if (dev == NULL) {
3948                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3949                 return -1;
3950         }
3951         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3952         dev->flags |= P2P_DEV_USER_REJECTED;
3953         return 0;
3954 }
3955
3956
3957 const char * p2p_wps_method_text(enum p2p_wps_method method)
3958 {
3959         switch (method) {
3960         case WPS_NOT_READY:
3961                 return "not-ready";
3962         case WPS_PIN_DISPLAY:
3963                 return "Display";
3964         case WPS_PIN_KEYPAD:
3965                 return "Keypad";
3966         case WPS_PBC:
3967                 return "PBC";
3968         case WPS_NFC:
3969                 return "NFC";
3970         case WPS_P2PS:
3971                 return "P2PS";
3972         }
3973
3974         return "??";
3975 }
3976
3977
3978 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3979 {
3980         switch (go_state) {
3981         case UNKNOWN_GO:
3982                 return "unknown";
3983         case LOCAL_GO:
3984                 return "local";
3985         case  REMOTE_GO:
3986                 return "remote";
3987         }
3988
3989         return "??";
3990 }
3991
3992
3993 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3994                                                const u8 *addr, int next)
3995 {
3996         struct p2p_device *dev;
3997
3998         if (addr)
3999                 dev = p2p_get_device(p2p, addr);
4000         else
4001                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4002
4003         if (dev && next) {
4004                 dev = dl_list_first(&dev->list, struct p2p_device, list);
4005                 if (&dev->list == &p2p->devices)
4006                         dev = NULL;
4007         }
4008
4009         if (dev == NULL)
4010                 return NULL;
4011
4012         return &dev->info;
4013 }
4014
4015
4016 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4017                           char *buf, size_t buflen)
4018 {
4019         struct p2p_device *dev;
4020         int res;
4021         char *pos, *end;
4022         struct os_reltime now;
4023
4024         if (info == NULL)
4025                 return -1;
4026
4027         dev = (struct p2p_device *) (((u8 *) info) -
4028                                      offsetof(struct p2p_device, info));
4029
4030         pos = buf;
4031         end = buf + buflen;
4032
4033         os_get_reltime(&now);
4034         res = os_snprintf(pos, end - pos,
4035                           "age=%d\n"
4036                           "listen_freq=%d\n"
4037                           "wps_method=%s\n"
4038                           "interface_addr=" MACSTR "\n"
4039                           "member_in_go_dev=" MACSTR "\n"
4040                           "member_in_go_iface=" MACSTR "\n"
4041                           "go_neg_req_sent=%d\n"
4042                           "go_state=%s\n"
4043                           "dialog_token=%u\n"
4044                           "intended_addr=" MACSTR "\n"
4045                           "country=%c%c\n"
4046                           "oper_freq=%d\n"
4047                           "req_config_methods=0x%x\n"
4048                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4049                           "status=%d\n"
4050                           "invitation_reqs=%u\n",
4051                           (int) (now.sec - dev->last_seen.sec),
4052                           dev->listen_freq,
4053                           p2p_wps_method_text(dev->wps_method),
4054                           MAC2STR(dev->interface_addr),
4055                           MAC2STR(dev->member_in_go_dev),
4056                           MAC2STR(dev->member_in_go_iface),
4057                           dev->go_neg_req_sent,
4058                           p2p_go_state_text(dev->go_state),
4059                           dev->dialog_token,
4060                           MAC2STR(dev->intended_addr),
4061                           dev->country[0] ? dev->country[0] : '_',
4062                           dev->country[1] ? dev->country[1] : '_',
4063                           dev->oper_freq,
4064                           dev->req_config_methods,
4065                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4066                           "[PROBE_REQ_ONLY]" : "",
4067                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4068                           dev->flags & P2P_DEV_NOT_YET_READY ?
4069                           "[NOT_YET_READY]" : "",
4070                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4071                           "[PD_PEER_DISPLAY]" : "",
4072                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4073                           "[PD_PEER_KEYPAD]" : "",
4074                           dev->flags & P2P_DEV_USER_REJECTED ?
4075                           "[USER_REJECTED]" : "",
4076                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4077                           "[PEER_WAITING_RESPONSE]" : "",
4078                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4079                           "[PREFER_PERSISTENT_GROUP]" : "",
4080                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4081                           "[WAIT_GO_NEG_RESPONSE]" : "",
4082                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4083                           "[WAIT_GO_NEG_CONFIRM]" : "",
4084                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4085                           "[GROUP_CLIENT_ONLY]" : "",
4086                           dev->flags & P2P_DEV_FORCE_FREQ ?
4087                           "[FORCE_FREQ]" : "",
4088                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
4089                           "[PD_FOR_JOIN]" : "",
4090                           dev->status,
4091                           dev->invitation_reqs);
4092         if (os_snprintf_error(end - pos, res))
4093                 return pos - buf;
4094         pos += res;
4095
4096         if (dev->ext_listen_period) {
4097                 res = os_snprintf(pos, end - pos,
4098                                   "ext_listen_period=%u\n"
4099                                   "ext_listen_interval=%u\n",
4100                                   dev->ext_listen_period,
4101                                   dev->ext_listen_interval);
4102                 if (os_snprintf_error(end - pos, res))
4103                         return pos - buf;
4104                 pos += res;
4105         }
4106
4107         if (dev->oper_ssid_len) {
4108                 res = os_snprintf(pos, end - pos,
4109                                   "oper_ssid=%s\n",
4110                                   wpa_ssid_txt(dev->oper_ssid,
4111                                                dev->oper_ssid_len));
4112                 if (os_snprintf_error(end - pos, res))
4113                         return pos - buf;
4114                 pos += res;
4115         }
4116
4117 #ifdef CONFIG_WIFI_DISPLAY
4118         if (dev->info.wfd_subelems) {
4119                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4120                 if (os_snprintf_error(end - pos, res))
4121                         return pos - buf;
4122                 pos += res;
4123
4124                 pos += wpa_snprintf_hex(pos, end - pos,
4125                                         wpabuf_head(dev->info.wfd_subelems),
4126                                         wpabuf_len(dev->info.wfd_subelems));
4127
4128                 res = os_snprintf(pos, end - pos, "\n");
4129                 if (os_snprintf_error(end - pos, res))
4130                         return pos - buf;
4131                 pos += res;
4132         }
4133 #endif /* CONFIG_WIFI_DISPLAY */
4134
4135         return pos - buf;
4136 }
4137
4138
4139 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4140 {
4141         return p2p_get_device(p2p, addr) != NULL;
4142 }
4143
4144
4145 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4146 {
4147         if (enabled) {
4148                 p2p_dbg(p2p, "Client discoverability enabled");
4149                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4150         } else {
4151                 p2p_dbg(p2p, "Client discoverability disabled");
4152                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4153         }
4154 }
4155
4156
4157 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4158                                               u32 duration2, u32 interval2)
4159 {
4160         struct wpabuf *req;
4161         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4162         u8 *len;
4163
4164         req = wpabuf_alloc(100);
4165         if (req == NULL)
4166                 return NULL;
4167
4168         if (duration1 || interval1) {
4169                 os_memset(&desc1, 0, sizeof(desc1));
4170                 desc1.count_type = 1;
4171                 desc1.duration = duration1;
4172                 desc1.interval = interval1;
4173                 ptr1 = &desc1;
4174
4175                 if (duration2 || interval2) {
4176                         os_memset(&desc2, 0, sizeof(desc2));
4177                         desc2.count_type = 2;
4178                         desc2.duration = duration2;
4179                         desc2.interval = interval2;
4180                         ptr2 = &desc2;
4181                 }
4182         }
4183
4184         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4185         len = p2p_buf_add_ie_hdr(req);
4186         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4187         p2p_buf_update_ie_hdr(req, len);
4188
4189         return req;
4190 }
4191
4192
4193 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4194                      const u8 *own_interface_addr, unsigned int freq,
4195                      u32 duration1, u32 interval1, u32 duration2,
4196                      u32 interval2)
4197 {
4198         struct wpabuf *req;
4199
4200         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4201                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4202                 "dur2=%u int2=%u",
4203                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4204                 freq, duration1, interval1, duration2, interval2);
4205
4206         req = p2p_build_presence_req(duration1, interval1, duration2,
4207                                      interval2);
4208         if (req == NULL)
4209                 return -1;
4210
4211         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4212         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4213                             go_interface_addr,
4214                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4215                 p2p_dbg(p2p, "Failed to send Action frame");
4216         }
4217         wpabuf_free(req);
4218
4219         return 0;
4220 }
4221
4222
4223 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4224                                                size_t noa_len, u8 dialog_token)
4225 {
4226         struct wpabuf *resp;
4227         u8 *len;
4228
4229         resp = wpabuf_alloc(100 + noa_len);
4230         if (resp == NULL)
4231                 return NULL;
4232
4233         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4234         len = p2p_buf_add_ie_hdr(resp);
4235         p2p_buf_add_status(resp, status);
4236         if (noa) {
4237                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4238                 wpabuf_put_le16(resp, noa_len);
4239                 wpabuf_put_data(resp, noa, noa_len);
4240         } else
4241                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4242         p2p_buf_update_ie_hdr(resp, len);
4243
4244         return resp;
4245 }
4246
4247
4248 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4249                                      const u8 *sa, const u8 *data, size_t len,
4250                                      int rx_freq)
4251 {
4252         struct p2p_message msg;
4253         u8 status;
4254         struct wpabuf *resp;
4255         size_t g;
4256         struct p2p_group *group = NULL;
4257         int parsed = 0;
4258         u8 noa[50];
4259         int noa_len;
4260
4261         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4262
4263         for (g = 0; g < p2p->num_groups; g++) {
4264                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4265                               ETH_ALEN) == 0) {
4266                         group = p2p->groups[g];
4267                         break;
4268                 }
4269         }
4270         if (group == NULL) {
4271                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4272                         MACSTR, MAC2STR(da));
4273                 return;
4274         }
4275
4276         if (p2p_parse(data, len, &msg) < 0) {
4277                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4278                 status = P2P_SC_FAIL_INVALID_PARAMS;
4279                 goto fail;
4280         }
4281         parsed = 1;
4282
4283         if (msg.noa == NULL) {
4284                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4285                 status = P2P_SC_FAIL_INVALID_PARAMS;
4286                 goto fail;
4287         }
4288
4289         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4290
4291 fail:
4292         if (p2p->cfg->get_noa)
4293                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4294                                             sizeof(noa));
4295         else
4296                 noa_len = -1;
4297         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4298                                        noa_len > 0 ? noa_len : 0,
4299                                        msg.dialog_token);
4300         if (parsed)
4301                 p2p_parse_free(&msg);
4302         if (resp == NULL)
4303                 return;
4304
4305         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4306         if (p2p_send_action(p2p, rx_freq, sa, da, da,
4307                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4308                 p2p_dbg(p2p, "Failed to send Action frame");
4309         }
4310         wpabuf_free(resp);
4311 }
4312
4313
4314 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4315                                       const u8 *sa, const u8 *data, size_t len)
4316 {
4317         struct p2p_message msg;
4318
4319         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4320
4321         if (p2p_parse(data, len, &msg) < 0) {
4322                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4323                 return;
4324         }
4325
4326         if (msg.status == NULL || msg.noa == NULL) {
4327                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4328                 p2p_parse_free(&msg);
4329                 return;
4330         }
4331
4332         if (p2p->cfg->presence_resp) {
4333                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4334                                         msg.noa, msg.noa_len);
4335         }
4336
4337         if (*msg.status) {
4338                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4339                         *msg.status);
4340                 p2p_parse_free(&msg);
4341                 return;
4342         }
4343
4344         p2p_dbg(p2p, "P2P Presence Request was accepted");
4345         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4346                     msg.noa, msg.noa_len);
4347         /* TODO: process NoA */
4348         p2p_parse_free(&msg);
4349 }
4350
4351
4352 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4353 {
4354         struct p2p_data *p2p = eloop_ctx;
4355
4356         if (p2p->ext_listen_interval) {
4357                 /* Schedule next extended listen timeout */
4358                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4359                                        p2p->ext_listen_interval_usec,
4360                                        p2p_ext_listen_timeout, p2p, NULL);
4361         }
4362
4363         if ((p2p->cfg->is_p2p_in_progress &&
4364              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4365             (p2p->pending_action_state == P2P_PENDING_PD &&
4366              p2p->pd_retries > 0)) {
4367                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4368                         p2p_state_txt(p2p->state));
4369                 return;
4370         }
4371
4372         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4373                 /*
4374                  * This should not really happen, but it looks like the Listen
4375                  * command may fail is something else (e.g., a scan) was
4376                  * running at an inconvenient time. As a workaround, allow new
4377                  * Extended Listen operation to be started.
4378                  */
4379                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4380                 p2p->ext_listen_only = 0;
4381                 p2p_set_state(p2p, P2P_IDLE);
4382         }
4383
4384         if (p2p->state != P2P_IDLE) {
4385                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4386                 return;
4387         }
4388
4389         p2p_dbg(p2p, "Extended Listen timeout");
4390         p2p->ext_listen_only = 1;
4391         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4392                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4393                 p2p->ext_listen_only = 0;
4394         }
4395 }
4396
4397
4398 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4399                    unsigned int interval)
4400 {
4401         if (period > 65535 || interval > 65535 || period > interval ||
4402             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4403                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4404                         period, interval);
4405                 return -1;
4406         }
4407
4408         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4409
4410         if (interval == 0) {
4411                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4412                 p2p->ext_listen_period = 0;
4413                 p2p->ext_listen_interval = 0;
4414                 return 0;
4415         }
4416
4417         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4418                 period, interval);
4419         p2p->ext_listen_period = period;
4420         p2p->ext_listen_interval = interval;
4421         p2p->ext_listen_interval_sec = interval / 1000;
4422         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4423
4424         eloop_register_timeout(p2p->ext_listen_interval_sec,
4425                                p2p->ext_listen_interval_usec,
4426                                p2p_ext_listen_timeout, p2p, NULL);
4427
4428         return 0;
4429 }
4430
4431
4432 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4433                       const u8 *ie, size_t ie_len)
4434 {
4435         struct p2p_message msg;
4436
4437         if (bssid == NULL || ie == NULL)
4438                 return;
4439
4440         os_memset(&msg, 0, sizeof(msg));
4441         if (p2p_parse_ies(ie, ie_len, &msg))
4442                 return;
4443         if (msg.minor_reason_code == NULL) {
4444                 p2p_parse_free(&msg);
4445                 return;
4446         }
4447
4448         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4449                 " reason_code=%u minor_reason_code=%u",
4450                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4451
4452         p2p_parse_free(&msg);
4453 }
4454
4455
4456 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4457                         const u8 *ie, size_t ie_len)
4458 {
4459         struct p2p_message msg;
4460
4461         if (bssid == NULL || ie == NULL)
4462                 return;
4463
4464         os_memset(&msg, 0, sizeof(msg));
4465         if (p2p_parse_ies(ie, ie_len, &msg))
4466                 return;
4467         if (msg.minor_reason_code == NULL) {
4468                 p2p_parse_free(&msg);
4469                 return;
4470         }
4471
4472         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4473                 " reason_code=%u minor_reason_code=%u",
4474                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4475
4476         p2p_parse_free(&msg);
4477 }
4478
4479
4480 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4481 {
4482         if (enabled) {
4483                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4484                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4485         } else {
4486                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4487                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4488         }
4489 }
4490
4491
4492 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4493                                  u8 *op_channel)
4494 {
4495         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4496 }
4497
4498
4499 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4500                            u8 forced)
4501 {
4502         if (p2p_channel_to_freq(reg_class, channel) < 0)
4503                 return -1;
4504
4505         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4506                 reg_class, channel);
4507
4508         /*
4509          * Listen channel was set in configuration or set by control interface;
4510          * cannot override it.
4511          */
4512         if (p2p->cfg->channel_forced && forced == 0)
4513                 return -1;
4514
4515         if (p2p->state == P2P_IDLE) {
4516                 p2p->cfg->reg_class = reg_class;
4517                 p2p->cfg->channel = channel;
4518                 p2p->cfg->channel_forced = forced;
4519         } else {
4520                 p2p_dbg(p2p, "Defer setting listen channel");
4521                 p2p->pending_reg_class = reg_class;
4522                 p2p->pending_channel = channel;
4523                 p2p->pending_channel_forced = forced;
4524         }
4525
4526         return 0;
4527 }
4528
4529
4530 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4531 {
4532         return p2p->cfg->channel;
4533 }
4534
4535
4536 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4537 {
4538         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4539         if (postfix == NULL) {
4540                 p2p->cfg->ssid_postfix_len = 0;
4541                 return 0;
4542         }
4543         if (len > sizeof(p2p->cfg->ssid_postfix))
4544                 return -1;
4545         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4546         p2p->cfg->ssid_postfix_len = len;
4547         return 0;
4548 }
4549
4550
4551 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4552                          int cfg_op_channel)
4553 {
4554         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4555                 return -1;
4556
4557         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4558                 op_reg_class, op_channel);
4559         p2p->cfg->op_reg_class = op_reg_class;
4560         p2p->cfg->op_channel = op_channel;
4561         p2p->cfg->cfg_op_channel = cfg_op_channel;
4562         return 0;
4563 }
4564
4565
4566 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4567                       const struct p2p_channel *pref_chan)
4568 {
4569         struct p2p_channel *n;
4570
4571         if (pref_chan) {
4572                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4573                 if (n == NULL)
4574                         return -1;
4575                 os_memcpy(n, pref_chan,
4576                           num_pref_chan * sizeof(struct p2p_channel));
4577         } else
4578                 n = NULL;
4579
4580         os_free(p2p->cfg->pref_chan);
4581         p2p->cfg->pref_chan = n;
4582         p2p->cfg->num_pref_chan = num_pref_chan;
4583
4584         return 0;
4585 }
4586
4587
4588 int p2p_set_no_go_freq(struct p2p_data *p2p,
4589                        const struct wpa_freq_range_list *list)
4590 {
4591         struct wpa_freq_range *tmp;
4592
4593         if (list == NULL || list->num == 0) {
4594                 os_free(p2p->no_go_freq.range);
4595                 p2p->no_go_freq.range = NULL;
4596                 p2p->no_go_freq.num = 0;
4597                 return 0;
4598         }
4599
4600         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4601         if (tmp == NULL)
4602                 return -1;
4603         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4604         os_free(p2p->no_go_freq.range);
4605         p2p->no_go_freq.range = tmp;
4606         p2p->no_go_freq.num = list->num;
4607         p2p_dbg(p2p, "Updated no GO chan list");
4608
4609         return 0;
4610 }
4611
4612
4613 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4614                            u8 *iface_addr)
4615 {
4616         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4617         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4618                 return -1;
4619         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4620         return 0;
4621 }
4622
4623
4624 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4625                            u8 *dev_addr)
4626 {
4627         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4628         if (dev == NULL)
4629                 return -1;
4630         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4631         return 0;
4632 }
4633
4634
4635 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4636 {
4637         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4638         if (is_zero_ether_addr(p2p->peer_filter))
4639                 p2p_dbg(p2p, "Disable peer filter");
4640         else
4641                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4642                         MAC2STR(p2p->peer_filter));
4643 }
4644
4645
4646 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4647 {
4648         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4649         if (p2p->cross_connect == enabled)
4650                 return;
4651         p2p->cross_connect = enabled;
4652         /* TODO: may need to tear down any action group where we are GO(?) */
4653 }
4654
4655
4656 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4657 {
4658         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4659         if (dev == NULL)
4660                 return -1;
4661         if (dev->oper_freq <= 0)
4662                 return -1;
4663         return dev->oper_freq;
4664 }
4665
4666
4667 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4668 {
4669         p2p_dbg(p2p, "Intra BSS distribution %s",
4670                 enabled ? "enabled" : "disabled");
4671         p2p->cfg->p2p_intra_bss = enabled;
4672 }
4673
4674
4675 void p2p_update_channel_list(struct p2p_data *p2p,
4676                              const struct p2p_channels *chan,
4677                              const struct p2p_channels *cli_chan)
4678 {
4679         p2p_dbg(p2p, "Update channel list");
4680         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4681         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4682         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4683                   sizeof(struct p2p_channels));
4684         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4685 }
4686
4687
4688 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4689                     const u8 *src, const u8 *bssid, const u8 *buf,
4690                     size_t len, unsigned int wait_time)
4691 {
4692         if (p2p->p2p_scan_running) {
4693                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4694                 if (p2p->after_scan_tx) {
4695                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4696                         os_free(p2p->after_scan_tx);
4697                 }
4698                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4699                                                len);
4700                 if (p2p->after_scan_tx == NULL)
4701                         return -1;
4702                 p2p->after_scan_tx->freq = freq;
4703                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4704                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4705                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4706                 p2p->after_scan_tx->len = len;
4707                 p2p->after_scan_tx->wait_time = wait_time;
4708                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4709                 return 0;
4710         }
4711
4712         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4713                                      buf, len, wait_time);
4714 }
4715
4716
4717 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4718                            int freq_overall)
4719 {
4720         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4721                 freq_24, freq_5, freq_overall);
4722         p2p->best_freq_24 = freq_24;
4723         p2p->best_freq_5 = freq_5;
4724         p2p->best_freq_overall = freq_overall;
4725 }
4726
4727
4728 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4729 {
4730         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4731         p2p->own_freq_preference = freq;
4732 }
4733
4734
4735 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4736 {
4737         if (p2p == NULL || p2p->go_neg_peer == NULL)
4738                 return NULL;
4739         return p2p->go_neg_peer->info.p2p_device_addr;
4740 }
4741
4742
4743 const struct p2p_peer_info *
4744 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4745 {
4746         struct p2p_device *dev;
4747
4748         if (addr) {
4749                 dev = p2p_get_device(p2p, addr);
4750                 if (!dev)
4751                         return NULL;
4752
4753                 if (!next) {
4754                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4755                                 return NULL;
4756
4757                         return &dev->info;
4758                 } else {
4759                         do {
4760                                 dev = dl_list_first(&dev->list,
4761                                                     struct p2p_device,
4762                                                     list);
4763                                 if (!dev || &dev->list == &p2p->devices)
4764                                         return NULL;
4765                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4766                 }
4767         } else {
4768                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4769                 if (!dev)
4770                         return NULL;
4771                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4772                         dev = dl_list_first(&dev->list,
4773                                             struct p2p_device,
4774                                             list);
4775                         if (!dev || &dev->list == &p2p->devices)
4776                                 return NULL;
4777                 }
4778         }
4779
4780         return &dev->info;
4781 }
4782
4783
4784 int p2p_in_progress(struct p2p_data *p2p)
4785 {
4786         if (p2p == NULL)
4787                 return 0;
4788         if (p2p->state == P2P_SEARCH)
4789                 return 2;
4790         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4791 }
4792
4793
4794 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4795                             u8 client_timeout)
4796 {
4797         if (p2p) {
4798                 p2p->go_timeout = go_timeout;
4799                 p2p->client_timeout = client_timeout;
4800         }
4801 }
4802
4803
4804 #ifdef CONFIG_WIFI_DISPLAY
4805
4806 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4807 {
4808         size_t g;
4809         struct p2p_group *group;
4810
4811         for (g = 0; g < p2p->num_groups; g++) {
4812                 group = p2p->groups[g];
4813                 p2p_group_force_beacon_update_ies(group);
4814         }
4815 }
4816
4817
4818 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4819 {
4820         wpabuf_free(p2p->wfd_ie_beacon);
4821         p2p->wfd_ie_beacon = ie;
4822         p2p_update_wfd_ie_groups(p2p);
4823         return 0;
4824 }
4825
4826
4827 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4828 {
4829         wpabuf_free(p2p->wfd_ie_probe_req);
4830         p2p->wfd_ie_probe_req = ie;
4831         return 0;
4832 }
4833
4834
4835 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4836 {
4837         wpabuf_free(p2p->wfd_ie_probe_resp);
4838         p2p->wfd_ie_probe_resp = ie;
4839         p2p_update_wfd_ie_groups(p2p);
4840         return 0;
4841 }
4842
4843
4844 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4845 {
4846         wpabuf_free(p2p->wfd_ie_assoc_req);
4847         p2p->wfd_ie_assoc_req = ie;
4848         return 0;
4849 }
4850
4851
4852 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4853 {
4854         wpabuf_free(p2p->wfd_ie_invitation);
4855         p2p->wfd_ie_invitation = ie;
4856         return 0;
4857 }
4858
4859
4860 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4861 {
4862         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4863         p2p->wfd_ie_prov_disc_req = ie;
4864         return 0;
4865 }
4866
4867
4868 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4869 {
4870         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4871         p2p->wfd_ie_prov_disc_resp = ie;
4872         return 0;
4873 }
4874
4875
4876 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4877 {
4878         wpabuf_free(p2p->wfd_ie_go_neg);
4879         p2p->wfd_ie_go_neg = ie;
4880         return 0;
4881 }
4882
4883
4884 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4885 {
4886         wpabuf_free(p2p->wfd_dev_info);
4887         if (elem) {
4888                 p2p->wfd_dev_info = wpabuf_dup(elem);
4889                 if (p2p->wfd_dev_info == NULL)
4890                         return -1;
4891         } else
4892                 p2p->wfd_dev_info = NULL;
4893
4894         return 0;
4895 }
4896
4897
4898 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4899 {
4900         wpabuf_free(p2p->wfd_assoc_bssid);
4901         if (elem) {
4902                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4903                 if (p2p->wfd_assoc_bssid == NULL)
4904                         return -1;
4905         } else
4906                 p2p->wfd_assoc_bssid = NULL;
4907
4908         return 0;
4909 }
4910
4911
4912 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4913                                   const struct wpabuf *elem)
4914 {
4915         wpabuf_free(p2p->wfd_coupled_sink_info);
4916         if (elem) {
4917                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4918                 if (p2p->wfd_coupled_sink_info == NULL)
4919                         return -1;
4920         } else
4921                 p2p->wfd_coupled_sink_info = NULL;
4922
4923         return 0;
4924 }
4925
4926 #endif /* CONFIG_WIFI_DISPLAY */
4927
4928
4929 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4930                      int max_disc_tu)
4931 {
4932         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4933                 return -1;
4934
4935         p2p->min_disc_int = min_disc_int;
4936         p2p->max_disc_int = max_disc_int;
4937         p2p->max_disc_tu = max_disc_tu;
4938         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4939                 min_disc_int, max_disc_int, max_disc_tu);
4940
4941         return 0;
4942 }
4943
4944
4945 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4946 {
4947         va_list ap;
4948         char buf[500];
4949
4950         if (!p2p->cfg->debug_print)
4951                 return;
4952
4953         va_start(ap, fmt);
4954         vsnprintf(buf, sizeof(buf), fmt, ap);
4955         buf[sizeof(buf) - 1] = '\0';
4956         va_end(ap);
4957         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4958 }
4959
4960
4961 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4962 {
4963         va_list ap;
4964         char buf[500];
4965
4966         if (!p2p->cfg->debug_print)
4967                 return;
4968
4969         va_start(ap, fmt);
4970         vsnprintf(buf, sizeof(buf), fmt, ap);
4971         buf[sizeof(buf) - 1] = '\0';
4972         va_end(ap);
4973         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4974 }
4975
4976
4977 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4978 {
4979         va_list ap;
4980         char buf[500];
4981
4982         if (!p2p->cfg->debug_print)
4983                 return;
4984
4985         va_start(ap, fmt);
4986         vsnprintf(buf, sizeof(buf), fmt, ap);
4987         buf[sizeof(buf) - 1] = '\0';
4988         va_end(ap);
4989         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4990 }
4991
4992
4993 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4994                              void (*peer_callback)(struct p2p_peer_info *peer,
4995                                                    void *user_data),
4996                              void *user_data)
4997 {
4998         struct p2p_device *dev, *n;
4999
5000         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5001                 peer_callback(&dev->info, user_data);
5002         }
5003 }
5004
5005
5006 #ifdef CONFIG_WPS_NFC
5007
5008 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5009                                               int client_freq,
5010                                               const u8 *go_dev_addr,
5011                                               const u8 *ssid, size_t ssid_len)
5012 {
5013         struct wpabuf *buf;
5014         u8 op_class, channel;
5015         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5016
5017         buf = wpabuf_alloc(1000);
5018         if (buf == NULL)
5019                 return NULL;
5020
5021         op_class = p2p->cfg->reg_class;
5022         channel = p2p->cfg->channel;
5023
5024         p2p_buf_add_capability(buf, p2p->dev_capab &
5025                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5026         p2p_buf_add_device_info(buf, p2p, NULL);
5027
5028         if (p2p->num_groups > 0) {
5029                 int freq = p2p_group_get_freq(p2p->groups[0]);
5030                 role = P2P_GO_IN_A_GROUP;
5031                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5032                         p2p_dbg(p2p,
5033                                 "Unknown GO operating frequency %d MHz for NFC handover",
5034                                 freq);
5035                         wpabuf_free(buf);
5036                         return NULL;
5037                 }
5038         } else if (client_freq > 0) {
5039                 role = P2P_CLIENT_IN_A_GROUP;
5040                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5041                         p2p_dbg(p2p,
5042                                 "Unknown client operating frequency %d MHz for NFC handover",
5043                                 client_freq);
5044                         wpabuf_free(buf);
5045                         return NULL;
5046                 }
5047         }
5048
5049         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5050                                        channel, role);
5051
5052         if (p2p->num_groups > 0) {
5053                 /* Limit number of clients to avoid very long message */
5054                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5055                 p2p_group_buf_add_id(p2p->groups[0], buf);
5056         } else if (client_freq > 0 &&
5057                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5058                    ssid && ssid_len > 0) {
5059                 /*
5060                  * Add the optional P2P Group ID to indicate in which group this
5061                  * device is a P2P Client.
5062                  */
5063                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5064         }
5065
5066         return buf;
5067 }
5068
5069
5070 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5071                                            int client_freq,
5072                                            const u8 *go_dev_addr,
5073                                            const u8 *ssid, size_t ssid_len)
5074 {
5075         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5076                                       ssid_len);
5077 }
5078
5079
5080 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5081                                            int client_freq,
5082                                            const u8 *go_dev_addr,
5083                                            const u8 *ssid, size_t ssid_len)
5084 {
5085         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5086                                       ssid_len);
5087 }
5088
5089
5090 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5091                                         struct p2p_nfc_params *params)
5092 {
5093         struct p2p_message msg;
5094         struct p2p_device *dev;
5095         const u8 *p2p_dev_addr;
5096         int freq;
5097         enum p2p_role_indication role;
5098
5099         params->next_step = NO_ACTION;
5100
5101         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5102                                    params->p2p_attr, params->p2p_len, &msg)) {
5103                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5104                 p2p_parse_free(&msg);
5105                 return -1;
5106         }
5107
5108         if (msg.p2p_device_addr)
5109                 p2p_dev_addr = msg.p2p_device_addr;
5110         else if (msg.device_id)
5111                 p2p_dev_addr = msg.device_id;
5112         else {
5113                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5114                 p2p_parse_free(&msg);
5115                 return -1;
5116         }
5117
5118         if (msg.oob_dev_password) {
5119                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5120                           msg.oob_dev_password_len);
5121                 params->oob_dev_pw_len = msg.oob_dev_password_len;
5122         }
5123
5124         dev = p2p_create_device(p2p, p2p_dev_addr);
5125         if (dev == NULL) {
5126                 p2p_parse_free(&msg);
5127                 return -1;
5128         }
5129
5130         params->peer = &dev->info;
5131
5132         os_get_reltime(&dev->last_seen);
5133         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5134         p2p_copy_wps_info(p2p, dev, 0, &msg);
5135
5136         if (!msg.oob_go_neg_channel) {
5137                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5138                 return -1;
5139         }
5140
5141         if (msg.oob_go_neg_channel[3] == 0 &&
5142             msg.oob_go_neg_channel[4] == 0)
5143                 freq = 0;
5144         else
5145                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5146                                            msg.oob_go_neg_channel[4]);
5147         if (freq < 0) {
5148                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5149                 return -1;
5150         }
5151         role = msg.oob_go_neg_channel[5];
5152
5153         if (role == P2P_GO_IN_A_GROUP) {
5154                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5155                 params->go_freq = freq;
5156         } else if (role == P2P_CLIENT_IN_A_GROUP) {
5157                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5158                         freq);
5159                 params->go_freq = freq;
5160         } else
5161                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5162         dev->oob_go_neg_freq = freq;
5163
5164         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5165                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5166                                            p2p->cfg->channel);
5167                 if (freq < 0) {
5168                         p2p_dbg(p2p, "Own listen channel not known");
5169                         return -1;
5170                 }
5171                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5172                 dev->oob_go_neg_freq = freq;
5173         }
5174
5175         if (msg.group_id) {
5176                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5177                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5178                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5179                           params->go_ssid_len);
5180         }
5181
5182         if (dev->flags & P2P_DEV_USER_REJECTED) {
5183                 p2p_dbg(p2p, "Do not report rejected device");
5184                 p2p_parse_free(&msg);
5185                 return 0;
5186         }
5187
5188         if (!(dev->flags & P2P_DEV_REPORTED)) {
5189                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5190                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
5191                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5192         }
5193         p2p_parse_free(&msg);
5194
5195         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5196                 params->next_step = BOTH_GO;
5197         else if (role == P2P_GO_IN_A_GROUP)
5198                 params->next_step = JOIN_GROUP;
5199         else if (role == P2P_CLIENT_IN_A_GROUP) {
5200                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5201                 params->next_step = PEER_CLIENT;
5202         } else if (p2p->num_groups > 0)
5203                 params->next_step = AUTH_JOIN;
5204         else if (params->sel)
5205                 params->next_step = INIT_GO_NEG;
5206         else
5207                 params->next_step = RESP_GO_NEG;
5208
5209         return 0;
5210 }
5211
5212
5213 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5214                                       int go_intent,
5215                                       const u8 *own_interface_addr)
5216 {
5217
5218         p2p->authorized_oob_dev_pw_id = dev_pw_id;
5219         if (dev_pw_id == 0) {
5220                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5221                 return;
5222         }
5223
5224         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5225                 dev_pw_id);
5226
5227         p2p->go_intent = go_intent;
5228         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5229 }
5230
5231 #endif /* CONFIG_WPS_NFC */
5232
5233
5234 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5235 {
5236         if (len < 8 || len > 63)
5237                 return -1;
5238         p2p->cfg->passphrase_len = len;
5239         return 0;
5240 }
5241
5242
5243 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5244 {
5245         p2p->vendor_elem = vendor_elem;
5246 }
5247
5248
5249 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5250 {
5251         struct p2p_data *p2p = eloop_ctx;
5252
5253         p2p_dbg(p2p,
5254                 "Timeout on waiting peer to become ready for GO Negotiation");
5255         p2p_go_neg_failed(p2p, -1);
5256 }