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         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1739         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1740         return 0;
1741 }
1742
1743
1744 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1745 {
1746         struct p2p_go_neg_results res;
1747         int go = peer->go_state == LOCAL_GO;
1748         struct p2p_channels intersection;
1749
1750         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1751                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1752
1753         os_memset(&res, 0, sizeof(res));
1754         res.role_go = go;
1755         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1756         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1757         res.wps_method = peer->wps_method;
1758         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1759                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1760                         res.persistent_group = 2;
1761                 else
1762                         res.persistent_group = 1;
1763         }
1764
1765         if (go) {
1766                 /* Setup AP mode for WPS provisioning */
1767                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1768                                                p2p->op_channel);
1769                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1770                 res.ssid_len = p2p->ssid_len;
1771                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1772         } else {
1773                 res.freq = peer->oper_freq;
1774                 if (p2p->ssid_len) {
1775                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1776                         res.ssid_len = p2p->ssid_len;
1777                 }
1778         }
1779
1780         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1781         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1782         p2p_channels_intersect(&p2p->channels, &peer->channels,
1783                                &intersection);
1784         if (go) {
1785                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1786                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1787                                   &intersection);
1788         }
1789
1790         p2p_channels_to_freqs(&intersection, res.freq_list,
1791                               P2P_MAX_CHANNELS);
1792
1793         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1794
1795         p2p_clear_timeout(p2p);
1796         p2p->ssid_set = 0;
1797         peer->go_neg_req_sent = 0;
1798         peer->wps_method = WPS_NOT_READY;
1799         peer->oob_pw_id = 0;
1800         wpabuf_free(peer->go_neg_conf);
1801         peer->go_neg_conf = NULL;
1802
1803         p2p_set_state(p2p, P2P_PROVISIONING);
1804         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1805 }
1806
1807
1808 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1809                               const u8 *data, size_t len, int rx_freq)
1810 {
1811         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1812         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1813
1814         if (len < 1)
1815                 return;
1816
1817         switch (data[0]) {
1818         case P2P_GO_NEG_REQ:
1819                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1820                 break;
1821         case P2P_GO_NEG_RESP:
1822                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1823                 break;
1824         case P2P_GO_NEG_CONF:
1825                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1826                 break;
1827         case P2P_INVITATION_REQ:
1828                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1829                                            rx_freq);
1830                 break;
1831         case P2P_INVITATION_RESP:
1832                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1833                 break;
1834         case P2P_PROV_DISC_REQ:
1835                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1836                 break;
1837         case P2P_PROV_DISC_RESP:
1838                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1839                 break;
1840         case P2P_DEV_DISC_REQ:
1841                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1842                 break;
1843         case P2P_DEV_DISC_RESP:
1844                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1845                 break;
1846         default:
1847                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1848                         data[0]);
1849                 break;
1850         }
1851 }
1852
1853
1854 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1855                                  const u8 *sa, const u8 *bssid, const u8 *data,
1856                                  size_t len, int freq)
1857 {
1858         if (len < 1)
1859                 return;
1860
1861         switch (data[0]) {
1862         case WLAN_PA_VENDOR_SPECIFIC:
1863                 data++;
1864                 len--;
1865                 if (len < 4)
1866                         return;
1867                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1868                         return;
1869
1870                 data += 4;
1871                 len -= 4;
1872
1873                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1874                 break;
1875         case WLAN_PA_GAS_INITIAL_REQ:
1876                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1877                 break;
1878         case WLAN_PA_GAS_INITIAL_RESP:
1879                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1880                 break;
1881         case WLAN_PA_GAS_COMEBACK_REQ:
1882                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1883                 break;
1884         case WLAN_PA_GAS_COMEBACK_RESP:
1885                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1886                 break;
1887         }
1888 }
1889
1890
1891 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1892                    const u8 *bssid, u8 category,
1893                    const u8 *data, size_t len, int freq)
1894 {
1895         if (category == WLAN_ACTION_PUBLIC) {
1896                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1897                 return;
1898         }
1899
1900         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1901                 return;
1902
1903         if (len < 4)
1904                 return;
1905
1906         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1907                 return;
1908         data += 4;
1909         len -= 4;
1910
1911         /* P2P action frame */
1912         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1913         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1914
1915         if (len < 1)
1916                 return;
1917         switch (data[0]) {
1918         case P2P_NOA:
1919                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1920                 /* TODO */
1921                 break;
1922         case P2P_PRESENCE_REQ:
1923                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1924                 break;
1925         case P2P_PRESENCE_RESP:
1926                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1927                 break;
1928         case P2P_GO_DISC_REQ:
1929                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1930                 break;
1931         default:
1932                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1933                 break;
1934         }
1935 }
1936
1937
1938 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1939 {
1940         struct p2p_data *p2p = eloop_ctx;
1941         if (p2p->go_neg_peer == NULL)
1942                 return;
1943         if (p2p->pending_listen_freq) {
1944                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1945                 p2p->pending_listen_freq = 0;
1946         }
1947         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1948         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1949         /*
1950          * Set new timeout to make sure a previously set one does not expire
1951          * too quickly while waiting for the GO Negotiation to complete.
1952          */
1953         p2p_set_timeout(p2p, 0, 500000);
1954         p2p_connect_send(p2p, p2p->go_neg_peer);
1955 }
1956
1957
1958 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1959 {
1960         struct p2p_data *p2p = eloop_ctx;
1961         if (p2p->invite_peer == NULL)
1962                 return;
1963         if (p2p->pending_listen_freq) {
1964                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1965                 p2p->pending_listen_freq = 0;
1966         }
1967         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1968         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1969                         p2p->invite_dev_pw_id);
1970 }
1971
1972
1973 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1974                                        const u8 *ie, size_t ie_len)
1975 {
1976         struct p2p_message msg;
1977         struct p2p_device *dev;
1978
1979         os_memset(&msg, 0, sizeof(msg));
1980         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1981         {
1982                 p2p_parse_free(&msg);
1983                 return; /* not a P2P probe */
1984         }
1985
1986         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1987             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1988             != 0) {
1989                 /* The Probe Request is not part of P2P Device Discovery. It is
1990                  * not known whether the source address of the frame is the P2P
1991                  * Device Address or P2P Interface Address. Do not add a new
1992                  * peer entry based on this frames.
1993                  */
1994                 p2p_parse_free(&msg);
1995                 return;
1996         }
1997
1998         dev = p2p_get_device(p2p, addr);
1999         if (dev) {
2000                 if (dev->country[0] == 0 && msg.listen_channel)
2001                         os_memcpy(dev->country, msg.listen_channel, 3);
2002                 os_get_reltime(&dev->last_seen);
2003                 p2p_parse_free(&msg);
2004                 return; /* already known */
2005         }
2006
2007         dev = p2p_create_device(p2p, addr);
2008         if (dev == NULL) {
2009                 p2p_parse_free(&msg);
2010                 return;
2011         }
2012
2013         os_get_reltime(&dev->last_seen);
2014         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2015
2016         if (msg.listen_channel) {
2017                 os_memcpy(dev->country, msg.listen_channel, 3);
2018                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2019                                                        msg.listen_channel[4]);
2020         }
2021
2022         p2p_copy_wps_info(p2p, dev, 1, &msg);
2023
2024         if (msg.wfd_subelems) {
2025                 wpabuf_free(dev->info.wfd_subelems);
2026                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2027         }
2028
2029         p2p_parse_free(&msg);
2030
2031         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2032                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2033                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2034                 dev->info.group_capab, dev->info.device_name,
2035                 dev->listen_freq);
2036 }
2037
2038
2039 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2040                                                 const u8 *addr,
2041                                                 struct p2p_message *msg)
2042 {
2043         struct p2p_device *dev;
2044
2045         dev = p2p_get_device(p2p, addr);
2046         if (dev) {
2047                 os_get_reltime(&dev->last_seen);
2048                 return dev; /* already known */
2049         }
2050
2051         dev = p2p_create_device(p2p, addr);
2052         if (dev == NULL)
2053                 return NULL;
2054
2055         p2p_add_dev_info(p2p, addr, dev, msg);
2056
2057         return dev;
2058 }
2059
2060
2061 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2062 {
2063         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2064                 return 1;
2065         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2066             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2067             WPA_GET_BE16(&req_dev_type[6]) == 0)
2068                 return 1; /* Category match with wildcard OUI/sub-category */
2069         return 0;
2070 }
2071
2072
2073 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2074                         size_t num_req_dev_type)
2075 {
2076         size_t i;
2077         for (i = 0; i < num_req_dev_type; i++) {
2078                 if (dev_type_match(dev_type, req_dev_type[i]))
2079                         return 1;
2080         }
2081         return 0;
2082 }
2083
2084
2085 /**
2086  * p2p_match_dev_type - Match local device type with requested type
2087  * @p2p: P2P module context from p2p_init()
2088  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2089  * Returns: 1 on match, 0 on mismatch
2090  *
2091  * This function can be used to match the Requested Device Type attribute in
2092  * WPS IE with the local device types for deciding whether to reply to a Probe
2093  * Request frame.
2094  */
2095 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2096 {
2097         struct wps_parse_attr attr;
2098         size_t i;
2099
2100         if (wps_parse_msg(wps, &attr))
2101                 return 1; /* assume no Requested Device Type attributes */
2102
2103         if (attr.num_req_dev_type == 0)
2104                 return 1; /* no Requested Device Type attributes -> match */
2105
2106         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2107                                 attr.num_req_dev_type))
2108                 return 1; /* Own Primary Device Type matches */
2109
2110         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2111                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2112                                         attr.req_dev_type,
2113                                         attr.num_req_dev_type))
2114                         return 1; /* Own Secondary Device Type matches */
2115         }
2116
2117         /* No matching device type found */
2118         return 0;
2119 }
2120
2121
2122 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2123 {
2124         struct wpabuf *buf;
2125         u8 *len;
2126         int pw_id = -1;
2127         size_t extra = 0;
2128
2129 #ifdef CONFIG_WIFI_DISPLAY
2130         if (p2p->wfd_ie_probe_resp)
2131                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2132 #endif /* CONFIG_WIFI_DISPLAY */
2133
2134         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2135                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2136
2137         if (p2p->query_count)
2138                 extra += MAX_SVC_ADV_IE_LEN;
2139
2140         buf = wpabuf_alloc(1000 + extra);
2141         if (buf == NULL)
2142                 return NULL;
2143
2144         if (p2p->go_neg_peer) {
2145                 /* Advertise immediate availability of WPS credential */
2146                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2147         }
2148
2149         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2150                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2151                 wpabuf_free(buf);
2152                 return NULL;
2153         }
2154
2155 #ifdef CONFIG_WIFI_DISPLAY
2156         if (p2p->wfd_ie_probe_resp)
2157                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2158 #endif /* CONFIG_WIFI_DISPLAY */
2159
2160         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2161                 wpabuf_put_buf(buf,
2162                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2163
2164         /* P2P IE */
2165         len = p2p_buf_add_ie_hdr(buf);
2166         p2p_buf_add_capability(buf, p2p->dev_capab &
2167                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2168         if (p2p->ext_listen_interval)
2169                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2170                                               p2p->ext_listen_interval);
2171         p2p_buf_add_device_info(buf, p2p, NULL);
2172         p2p_buf_update_ie_hdr(buf, len);
2173
2174         if (p2p->query_count) {
2175                 p2p_buf_add_service_instance(buf, p2p, p2p->query_count,
2176                                              p2p->query_hash,
2177                                              p2p->p2ps_adv_list);
2178         }
2179
2180         return buf;
2181 }
2182
2183
2184 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2185 {
2186         struct p2ps_advertisement *adv_data;
2187
2188         p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2189
2190         /* Wildcard always matches if we have actual services */
2191         if (os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0)
2192                 return p2p->p2ps_adv_list != NULL;
2193
2194         adv_data = p2p->p2ps_adv_list;
2195         while (adv_data) {
2196                 p2p_dbg(p2p, "ASP hash: %x =? %x", hash[0], adv_data->hash[0]);
2197                 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2198                         return 1;
2199                 adv_data = adv_data->next;
2200         }
2201
2202         return 0;
2203 }
2204
2205
2206 static enum p2p_probe_req_status
2207 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2208                 const u8 *bssid, const u8 *ie, size_t ie_len)
2209 {
2210         struct ieee802_11_elems elems;
2211         struct wpabuf *buf;
2212         struct ieee80211_mgmt *resp;
2213         struct p2p_message msg;
2214         struct wpabuf *ies;
2215
2216         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2217             ParseFailed) {
2218                 /* Ignore invalid Probe Request frames */
2219                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2220                 return P2P_PREQ_MALFORMED;
2221         }
2222
2223         if (elems.p2p == NULL) {
2224                 /* not a P2P probe - ignore it */
2225                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2226                 return P2P_PREQ_NOT_P2P;
2227         }
2228
2229         if (dst && !is_broadcast_ether_addr(dst) &&
2230             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2231                 /* Not sent to the broadcast address or our P2P Device Address
2232                  */
2233                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2234                         MAC2STR(dst));
2235                 return P2P_PREQ_NOT_PROCESSED;
2236         }
2237
2238         if (bssid && !is_broadcast_ether_addr(bssid)) {
2239                 /* Not sent to the Wildcard BSSID */
2240                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2241                         MAC2STR(bssid));
2242                 return P2P_PREQ_NOT_PROCESSED;
2243         }
2244
2245         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2246             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2247             0) {
2248                 /* not using P2P Wildcard SSID - ignore */
2249                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2250                 return P2P_PREQ_NOT_PROCESSED;
2251         }
2252
2253         if (supp_rates_11b_only(&elems)) {
2254                 /* Indicates support for 11b rates only */
2255                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2256                 return P2P_PREQ_NOT_P2P;
2257         }
2258
2259         os_memset(&msg, 0, sizeof(msg));
2260         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2261                 /* Could not parse P2P attributes */
2262                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2263                 return P2P_PREQ_NOT_P2P;
2264         }
2265
2266         p2p->p2ps_svc_found = 0;
2267
2268         if (msg.service_hash && msg.service_hash_count) {
2269                 const u8 *hash = msg.service_hash;
2270                 u8 *dest = p2p->query_hash;
2271                 u8 i;
2272
2273                 p2p->query_count = 0;
2274                 for (i = 0; i < msg.service_hash_count; i++) {
2275                         if (p2p_service_find_asp(p2p, hash)) {
2276                                 p2p->p2ps_svc_found = 1;
2277
2278                                 if (!os_memcmp(hash, p2p->wild_card_hash,
2279                                                P2PS_HASH_LEN)) {
2280                                         /* We found match(es) but wildcard
2281                                          * will return all */
2282                                         p2p->query_count = 1;
2283                                         os_memcpy(p2p->query_hash, hash,
2284                                                   P2PS_HASH_LEN);
2285                                         break;
2286                                 }
2287
2288                                 /* Save each matching hash */
2289                                 if (p2p->query_count < P2P_MAX_QUERY_HASH) {
2290                                         os_memcpy(dest, hash, P2PS_HASH_LEN);
2291                                         dest += P2PS_HASH_LEN;
2292                                         p2p->query_count++;
2293                                 } else {
2294                                         /* We found match(es) but too many to
2295                                          * return all */
2296                                         p2p->query_count = 0;
2297                                         break;
2298                                 }
2299                         }
2300                         hash += P2PS_HASH_LEN;
2301                 }
2302
2303                 p2p_dbg(p2p, "ASP adv found: %d", p2p->p2ps_svc_found);
2304
2305                 /* Probed hash unknown */
2306                 if (!p2p->p2ps_svc_found) {
2307                         p2p_parse_free(&msg);
2308                         return P2P_PREQ_NOT_PROCESSED;
2309                 }
2310         } else {
2311                 /* This is not a P2PS Probe Request */
2312                 p2p->query_count = 0;
2313                 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2314
2315                 if (!p2p->in_listen || !p2p->drv_in_listen) {
2316                         /* not in Listen state - ignore Probe Request */
2317                         p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2318                                 p2p->in_listen, p2p->drv_in_listen);
2319                         p2p_parse_free(&msg);
2320                         return P2P_PREQ_NOT_LISTEN;
2321                 }
2322         }
2323
2324         if (msg.device_id &&
2325             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2326                 /* Device ID did not match */
2327                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2328                         MAC2STR(msg.device_id));
2329                 p2p_parse_free(&msg);
2330                 return P2P_PREQ_NOT_PROCESSED;
2331         }
2332
2333         /* Check Requested Device Type match */
2334         if (msg.wps_attributes &&
2335             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2336                 /* No match with Requested Device Type */
2337                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2338                 p2p_parse_free(&msg);
2339                 return P2P_PREQ_NOT_PROCESSED;
2340         }
2341         p2p_parse_free(&msg);
2342
2343         if (!p2p->cfg->send_probe_resp) {
2344                 /* Response generated elsewhere */
2345                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2346                 return P2P_PREQ_NOT_PROCESSED;
2347         }
2348
2349         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2350
2351         /*
2352          * We do not really have a specific BSS that this frame is advertising,
2353          * so build a frame that has some information in valid format. This is
2354          * really only used for discovery purposes, not to learn exact BSS
2355          * parameters.
2356          */
2357         ies = p2p_build_probe_resp_ies(p2p);
2358         if (ies == NULL)
2359                 return P2P_PREQ_NOT_PROCESSED;
2360
2361         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2362         if (buf == NULL) {
2363                 wpabuf_free(ies);
2364                 return P2P_PREQ_NOT_PROCESSED;
2365         }
2366
2367         resp = NULL;
2368         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2369
2370         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2371                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2372         os_memcpy(resp->da, addr, ETH_ALEN);
2373         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2374         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2375         resp->u.probe_resp.beacon_int = host_to_le16(100);
2376         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2377         resp->u.probe_resp.capab_info =
2378                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2379                              WLAN_CAPABILITY_PRIVACY |
2380                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2381
2382         wpabuf_put_u8(buf, WLAN_EID_SSID);
2383         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2384         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2385
2386         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2387         wpabuf_put_u8(buf, 8);
2388         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2389         wpabuf_put_u8(buf, 90 / 5);
2390         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2391         wpabuf_put_u8(buf, 180 / 5);
2392         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2393         wpabuf_put_u8(buf, 360 / 5);
2394         wpabuf_put_u8(buf, 480 / 5);
2395         wpabuf_put_u8(buf, 540 / 5);
2396
2397         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2398         wpabuf_put_u8(buf, 1);
2399         wpabuf_put_u8(buf, p2p->cfg->channel);
2400
2401         wpabuf_put_buf(buf, ies);
2402         wpabuf_free(ies);
2403
2404         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2405
2406         wpabuf_free(buf);
2407
2408         return P2P_PREQ_NOT_PROCESSED;
2409 }
2410
2411
2412 enum p2p_probe_req_status
2413 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2414                  const u8 *bssid, const u8 *ie, size_t ie_len)
2415 {
2416         enum p2p_probe_req_status res;
2417
2418         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2419
2420         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2421         p2p->query_count = 0;
2422
2423         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2424             p2p->go_neg_peer &&
2425             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2426             == 0 &&
2427             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2428                 /* Received a Probe Request from GO Negotiation peer */
2429                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2430                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2431                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2432                 return P2P_PREQ_PROCESSED;
2433         }
2434
2435         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2436             p2p->invite_peer &&
2437             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2438             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2439             == 0) {
2440                 /* Received a Probe Request from Invite peer */
2441                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2442                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2443                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2444                 return P2P_PREQ_PROCESSED;
2445         }
2446
2447         return res;
2448 }
2449
2450
2451 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2452                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2453 {
2454         struct wpabuf *tmp;
2455         u8 *lpos;
2456         size_t tmplen;
2457         int res;
2458         u8 group_capab;
2459
2460         if (p2p_ie == NULL)
2461                 return 0; /* WLAN AP is not a P2P manager */
2462
2463         /*
2464          * (Re)Association Request - P2P IE
2465          * P2P Capability attribute (shall be present)
2466          * P2P Interface attribute (present if concurrent device and
2467          *      P2P Management is enabled)
2468          */
2469         tmp = wpabuf_alloc(200);
2470         if (tmp == NULL)
2471                 return -1;
2472
2473         lpos = p2p_buf_add_ie_hdr(tmp);
2474         group_capab = 0;
2475         if (p2p->num_groups > 0) {
2476                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2477                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2478                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2479                     p2p->cross_connect)
2480                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2481         }
2482         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2483         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2484             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2485                 p2p_buf_add_p2p_interface(tmp, p2p);
2486         p2p_buf_update_ie_hdr(tmp, lpos);
2487
2488         tmplen = wpabuf_len(tmp);
2489         if (tmplen > len)
2490                 res = -1;
2491         else {
2492                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2493                 res = tmplen;
2494         }
2495         wpabuf_free(tmp);
2496
2497         return res;
2498 }
2499
2500
2501 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2502                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2503 {
2504         struct wpabuf *tmp;
2505         u8 *lpos;
2506         struct p2p_device *peer;
2507         size_t tmplen;
2508         int res;
2509         size_t extra = 0;
2510
2511         if (!p2p_group)
2512                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2513
2514 #ifdef CONFIG_WIFI_DISPLAY
2515         if (p2p->wfd_ie_assoc_req)
2516                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2517 #endif /* CONFIG_WIFI_DISPLAY */
2518
2519         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2520                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2521
2522         /*
2523          * (Re)Association Request - P2P IE
2524          * P2P Capability attribute (shall be present)
2525          * Extended Listen Timing (may be present)
2526          * P2P Device Info attribute (shall be present)
2527          */
2528         tmp = wpabuf_alloc(200 + extra);
2529         if (tmp == NULL)
2530                 return -1;
2531
2532 #ifdef CONFIG_WIFI_DISPLAY
2533         if (p2p->wfd_ie_assoc_req)
2534                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2535 #endif /* CONFIG_WIFI_DISPLAY */
2536
2537         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2538                 wpabuf_put_buf(tmp,
2539                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2540
2541         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2542
2543         lpos = p2p_buf_add_ie_hdr(tmp);
2544         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2545         if (p2p->ext_listen_interval)
2546                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2547                                               p2p->ext_listen_interval);
2548         p2p_buf_add_device_info(tmp, p2p, peer);
2549         p2p_buf_update_ie_hdr(tmp, lpos);
2550
2551         tmplen = wpabuf_len(tmp);
2552         if (tmplen > len)
2553                 res = -1;
2554         else {
2555                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2556                 res = tmplen;
2557         }
2558         wpabuf_free(tmp);
2559
2560         return res;
2561 }
2562
2563
2564 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2565 {
2566         struct wpabuf *p2p_ie;
2567         int ret;
2568
2569         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2570         if (p2p_ie == NULL)
2571                 return 0;
2572
2573         ret = p2p_attr_text(p2p_ie, buf, end);
2574         wpabuf_free(p2p_ie);
2575         return ret;
2576 }
2577
2578
2579 struct p2ps_advertisement *
2580 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2581 {
2582         struct p2ps_advertisement *adv_data;
2583
2584         if (!p2p)
2585                 return NULL;
2586
2587         adv_data = p2p->p2ps_adv_list;
2588         while (adv_data) {
2589                 if (adv_data->id == adv_id)
2590                         return adv_data;
2591                 adv_data = adv_data->next;
2592         }
2593
2594         return NULL;
2595 }
2596
2597
2598 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2599 {
2600         struct p2ps_advertisement *adv_data;
2601         struct p2ps_advertisement **prior;
2602
2603         if (!p2p)
2604                 return -1;
2605
2606         adv_data = p2p->p2ps_adv_list;
2607         prior = &p2p->p2ps_adv_list;
2608         while (adv_data) {
2609                 if (adv_data->id == adv_id) {
2610                         p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2611                         *prior = adv_data->next;
2612                         os_free(adv_data);
2613                         return 0;
2614                 }
2615                 prior = &adv_data->next;
2616                 adv_data = adv_data->next;
2617         }
2618
2619         return -1;
2620 }
2621
2622
2623 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2624                         const char *adv_str, u8 svc_state, u16 config_methods,
2625                         const char *svc_info)
2626 {
2627         struct p2ps_advertisement *adv_data, *tmp, **prev;
2628         u8 buf[P2PS_HASH_LEN];
2629         size_t adv_data_len, adv_len, info_len = 0;
2630
2631         if (!p2p || !adv_str || !adv_str[0])
2632                 return -1;
2633
2634         if (!(config_methods & p2p->cfg->config_methods)) {
2635                 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2636                         config_methods, p2p->cfg->config_methods);
2637                 return -1;
2638         }
2639
2640         if (!p2ps_gen_hash(p2p, adv_str, buf))
2641                 return -1;
2642
2643         if (svc_info)
2644                 info_len = os_strlen(svc_info);
2645         adv_len = os_strlen(adv_str);
2646         adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2647                 info_len + 1;
2648
2649         adv_data = os_zalloc(adv_data_len);
2650         if (!adv_data)
2651                 return -1;
2652
2653         os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2654         adv_data->id = adv_id;
2655         adv_data->state = svc_state;
2656         adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2657         adv_data->auto_accept = (u8) auto_accept;
2658         os_memcpy(adv_data->svc_name, adv_str, adv_len);
2659
2660         if (svc_info && info_len) {
2661                 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2662                 os_memcpy(adv_data->svc_info, svc_info, info_len);
2663         }
2664
2665         /*
2666          * Group Advertisements by service string. They do not need to be
2667          * sorted, but groups allow easier Probe Response instance grouping
2668          */
2669         tmp = p2p->p2ps_adv_list;
2670         prev = &p2p->p2ps_adv_list;
2671         while (tmp) {
2672                 if (tmp->id == adv_data->id) {
2673                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2674                                 os_free(adv_data);
2675                                 return -1;
2676                         }
2677                         adv_data->next = tmp->next;
2678                         *prev = adv_data;
2679                         os_free(tmp);
2680                         goto inserted;
2681                 } else {
2682                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2683                                 adv_data->next = tmp->next;
2684                                 tmp->next = adv_data;
2685                                 goto inserted;
2686                         }
2687                 }
2688                 prev = &tmp->next;
2689                 tmp = tmp->next;
2690         }
2691
2692         /* No svc_name match found */
2693         adv_data->next = p2p->p2ps_adv_list;
2694         p2p->p2ps_adv_list = adv_data;
2695
2696 inserted:
2697         p2p_dbg(p2p,
2698                 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'",
2699                 adv_id, adv_data->config_methods, svc_state, adv_str);
2700
2701         return 0;
2702 }
2703
2704
2705 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2706 {
2707         struct p2p_message msg;
2708
2709         os_memset(&msg, 0, sizeof(msg));
2710         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2711                 return -1;
2712
2713         if (msg.p2p_device_addr) {
2714                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2715                 return 0;
2716         } else if (msg.device_id) {
2717                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2718                 return 0;
2719         }
2720         return -1;
2721 }
2722
2723
2724 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2725 {
2726         struct wpabuf *p2p_ie;
2727         int ret;
2728
2729         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2730                                              P2P_IE_VENDOR_TYPE);
2731         if (p2p_ie == NULL)
2732                 return -1;
2733         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2734         wpabuf_free(p2p_ie);
2735         return ret;
2736 }
2737
2738
2739 static void p2p_clear_go_neg(struct p2p_data *p2p)
2740 {
2741         p2p->go_neg_peer = NULL;
2742         p2p_clear_timeout(p2p);
2743         p2p_set_state(p2p, P2P_IDLE);
2744 }
2745
2746
2747 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2748 {
2749         if (p2p->go_neg_peer == NULL) {
2750                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2751                 return; /* No pending Group Formation */
2752         }
2753
2754         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2755             0) {
2756                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2757                         MACSTR " (GO Negotiation peer " MACSTR ")",
2758                         MAC2STR(mac_addr),
2759                         MAC2STR(p2p->go_neg_peer->intended_addr));
2760                 return; /* Ignore unexpected peer address */
2761         }
2762
2763         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2764                 MAC2STR(mac_addr));
2765
2766         p2p_clear_go_neg(p2p);
2767 }
2768
2769
2770 void p2p_group_formation_failed(struct p2p_data *p2p)
2771 {
2772         if (p2p->go_neg_peer == NULL) {
2773                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2774                 return; /* No pending Group Formation */
2775         }
2776
2777         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2778                 MAC2STR(p2p->go_neg_peer->intended_addr));
2779
2780         p2p_clear_go_neg(p2p);
2781 }
2782
2783
2784 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2785 {
2786         struct p2p_data *p2p;
2787
2788         if (cfg->max_peers < 1 ||
2789             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2790                 return NULL;
2791
2792         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2793         if (p2p == NULL)
2794                 return NULL;
2795         p2p->cfg = (struct p2p_config *) (p2p + 1);
2796         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2797         if (cfg->dev_name)
2798                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2799         if (cfg->manufacturer)
2800                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2801         if (cfg->model_name)
2802                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2803         if (cfg->model_number)
2804                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2805         if (cfg->serial_number)
2806                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2807         if (cfg->pref_chan) {
2808                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2809                                                 sizeof(struct p2p_channel));
2810                 if (p2p->cfg->pref_chan) {
2811                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2812                                   cfg->num_pref_chan *
2813                                   sizeof(struct p2p_channel));
2814                 } else
2815                         p2p->cfg->num_pref_chan = 0;
2816         }
2817
2818         p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2819
2820         p2p->min_disc_int = 1;
2821         p2p->max_disc_int = 3;
2822         p2p->max_disc_tu = -1;
2823
2824         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2825                 p2p->next_tie_breaker = 0;
2826         p2p->next_tie_breaker &= 0x01;
2827         if (cfg->sd_request)
2828                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2829         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2830         if (cfg->concurrent_operations)
2831                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2832         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2833
2834         dl_list_init(&p2p->devices);
2835
2836         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2837                                p2p_expiration_timeout, p2p, NULL);
2838
2839         p2p->go_timeout = 100;
2840         p2p->client_timeout = 20;
2841         p2p->num_p2p_sd_queries = 0;
2842
2843         p2p_dbg(p2p, "initialized");
2844         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2845         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2846
2847         return p2p;
2848 }
2849
2850
2851 void p2p_deinit(struct p2p_data *p2p)
2852 {
2853         struct p2ps_advertisement *adv, *prev;
2854
2855 #ifdef CONFIG_WIFI_DISPLAY
2856         wpabuf_free(p2p->wfd_ie_beacon);
2857         wpabuf_free(p2p->wfd_ie_probe_req);
2858         wpabuf_free(p2p->wfd_ie_probe_resp);
2859         wpabuf_free(p2p->wfd_ie_assoc_req);
2860         wpabuf_free(p2p->wfd_ie_invitation);
2861         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2862         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2863         wpabuf_free(p2p->wfd_ie_go_neg);
2864         wpabuf_free(p2p->wfd_dev_info);
2865         wpabuf_free(p2p->wfd_assoc_bssid);
2866         wpabuf_free(p2p->wfd_coupled_sink_info);
2867 #endif /* CONFIG_WIFI_DISPLAY */
2868
2869         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2870         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2871         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2872         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2873         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2874         p2p_flush(p2p);
2875         p2p_free_req_dev_types(p2p);
2876         os_free(p2p->cfg->dev_name);
2877         os_free(p2p->cfg->manufacturer);
2878         os_free(p2p->cfg->model_name);
2879         os_free(p2p->cfg->model_number);
2880         os_free(p2p->cfg->serial_number);
2881         os_free(p2p->cfg->pref_chan);
2882         os_free(p2p->groups);
2883         wpabuf_free(p2p->sd_resp);
2884         os_free(p2p->after_scan_tx);
2885         p2p_remove_wps_vendor_extensions(p2p);
2886         os_free(p2p->no_go_freq.range);
2887
2888         adv = p2p->p2ps_adv_list;
2889         while (adv) {
2890                 prev = adv;
2891                 adv = adv->next;
2892                 os_free(prev);
2893         }
2894
2895         os_free(p2p);
2896 }
2897
2898
2899 void p2p_flush(struct p2p_data *p2p)
2900 {
2901         struct p2p_device *dev, *prev;
2902         p2p_stop_find(p2p);
2903         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2904                               list) {
2905                 dl_list_del(&dev->list);
2906                 p2p_device_free(p2p, dev);
2907         }
2908         p2p_free_sd_queries(p2p);
2909         os_free(p2p->after_scan_tx);
2910         p2p->after_scan_tx = NULL;
2911 }
2912
2913
2914 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2915 {
2916         struct p2p_device *dev;
2917
2918         dev = p2p_get_device(p2p, addr);
2919         if (dev == NULL)
2920                 return -1;
2921
2922         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2923
2924         if (p2p->go_neg_peer == dev) {
2925                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2926                 p2p->go_neg_peer = NULL;
2927         }
2928
2929         dev->wps_method = WPS_NOT_READY;
2930         dev->oob_pw_id = 0;
2931         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2932         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2933
2934         /* Check if after_scan_tx is for this peer. If so free it */
2935         if (p2p->after_scan_tx &&
2936             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2937                 os_free(p2p->after_scan_tx);
2938                 p2p->after_scan_tx = NULL;
2939         }
2940
2941         return 0;
2942 }
2943
2944
2945 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2946 {
2947         os_free(p2p->cfg->dev_name);
2948         if (dev_name) {
2949                 p2p->cfg->dev_name = os_strdup(dev_name);
2950                 if (p2p->cfg->dev_name == NULL)
2951                         return -1;
2952         } else
2953                 p2p->cfg->dev_name = NULL;
2954         return 0;
2955 }
2956
2957
2958 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2959 {
2960         os_free(p2p->cfg->manufacturer);
2961         p2p->cfg->manufacturer = NULL;
2962         if (manufacturer) {
2963                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2964                 if (p2p->cfg->manufacturer == NULL)
2965                         return -1;
2966         }
2967
2968         return 0;
2969 }
2970
2971
2972 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2973 {
2974         os_free(p2p->cfg->model_name);
2975         p2p->cfg->model_name = NULL;
2976         if (model_name) {
2977                 p2p->cfg->model_name = os_strdup(model_name);
2978                 if (p2p->cfg->model_name == NULL)
2979                         return -1;
2980         }
2981
2982         return 0;
2983 }
2984
2985
2986 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2987 {
2988         os_free(p2p->cfg->model_number);
2989         p2p->cfg->model_number = NULL;
2990         if (model_number) {
2991                 p2p->cfg->model_number = os_strdup(model_number);
2992                 if (p2p->cfg->model_number == NULL)
2993                         return -1;
2994         }
2995
2996         return 0;
2997 }
2998
2999
3000 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3001 {
3002         os_free(p2p->cfg->serial_number);
3003         p2p->cfg->serial_number = NULL;
3004         if (serial_number) {
3005                 p2p->cfg->serial_number = os_strdup(serial_number);
3006                 if (p2p->cfg->serial_number == NULL)
3007                         return -1;
3008         }
3009
3010         return 0;
3011 }
3012
3013
3014 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3015 {
3016         p2p->cfg->config_methods = config_methods;
3017 }
3018
3019
3020 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3021 {
3022         os_memcpy(p2p->cfg->uuid, uuid, 16);
3023 }
3024
3025
3026 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3027 {
3028         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3029         return 0;
3030 }
3031
3032
3033 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3034                           size_t num_dev_types)
3035 {
3036         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3037                 num_dev_types = P2P_SEC_DEVICE_TYPES;
3038         p2p->cfg->num_sec_dev_types = num_dev_types;
3039         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3040         return 0;
3041 }
3042
3043
3044 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3045 {
3046         int i;
3047
3048         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3049                 wpabuf_free(p2p->wps_vendor_ext[i]);
3050                 p2p->wps_vendor_ext[i] = NULL;
3051         }
3052 }
3053
3054
3055 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3056                                  const struct wpabuf *vendor_ext)
3057 {
3058         int i;
3059
3060         if (vendor_ext == NULL)
3061                 return -1;
3062
3063         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3064                 if (p2p->wps_vendor_ext[i] == NULL)
3065                         break;
3066         }
3067         if (i >= P2P_MAX_WPS_VENDOR_EXT)
3068                 return -1;
3069
3070         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3071         if (p2p->wps_vendor_ext[i] == NULL)
3072                 return -1;
3073
3074         return 0;
3075 }
3076
3077
3078 int p2p_set_country(struct p2p_data *p2p, const char *country)
3079 {
3080         os_memcpy(p2p->cfg->country, country, 3);
3081         return 0;
3082 }
3083
3084
3085 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3086 {
3087         if (dev->sd_pending_bcast_queries == 0) {
3088                 /* Initialize with total number of registered broadcast
3089                  * SD queries. */
3090                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3091         }
3092
3093         if (p2p_start_sd(p2p, dev) == 0)
3094                 return 1;
3095
3096         if (dev->req_config_methods &&
3097             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3098                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3099                         MACSTR " (config methods 0x%x)",
3100                         MAC2STR(dev->info.p2p_device_addr),
3101                         dev->req_config_methods);
3102                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3103                         return 1;
3104         }
3105
3106         return 0;
3107 }
3108
3109
3110 void p2p_continue_find(struct p2p_data *p2p)
3111 {
3112         struct p2p_device *dev;
3113         int found;
3114
3115         p2p_set_state(p2p, P2P_SEARCH);
3116
3117         /* Continue from the device following the last iteration */
3118         found = 0;
3119         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3120                 if (dev == p2p->last_p2p_find_oper) {
3121                         found = 1;
3122                         continue;
3123                 }
3124                 if (!found)
3125                         continue;
3126                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3127                         p2p->last_p2p_find_oper = dev;
3128                         return;
3129                 }
3130         }
3131
3132         /*
3133          * Wrap around to the beginning of the list and continue until the last
3134          * iteration device.
3135          */
3136         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3137                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3138                         p2p->last_p2p_find_oper = dev;
3139                         return;
3140                 }
3141                 if (dev == p2p->last_p2p_find_oper)
3142                         break;
3143         }
3144
3145         p2p_listen_in_find(p2p, 1);
3146 }
3147
3148
3149 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3150 {
3151         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3152                 success);
3153         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3154
3155         if (!success) {
3156                 if (p2p->sd_peer)
3157                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3158                 p2p->sd_peer = NULL;
3159                 p2p_continue_find(p2p);
3160                 return;
3161         }
3162
3163         if (p2p->sd_peer == NULL) {
3164                 p2p_dbg(p2p, "No SD peer entry known");
3165                 p2p_continue_find(p2p);
3166                 return;
3167         }
3168
3169         if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3170                 /* Update the pending broadcast SD query count for this device
3171                  */
3172                 p2p->sd_peer->sd_pending_bcast_queries--;
3173
3174                 /*
3175                  * If there are no pending broadcast queries for this device,
3176                  * mark it as done (-1).
3177                  */
3178                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3179                         p2p->sd_peer->sd_pending_bcast_queries = -1;
3180         }
3181
3182         /* Wait for response from the peer */
3183         p2p_set_state(p2p, P2P_SD_DURING_FIND);
3184         p2p_set_timeout(p2p, 0, 200000);
3185 }
3186
3187
3188 /**
3189  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3190  * @p2p: P2P module context from p2p_init()
3191  */
3192 static void p2p_retry_pd(struct p2p_data *p2p)
3193 {
3194         struct p2p_device *dev;
3195
3196         if (p2p->state != P2P_IDLE)
3197                 return;
3198
3199         /*
3200          * Retry the prov disc req attempt only for the peer that the user had
3201          * requested.
3202          */
3203
3204         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3205                 if (os_memcmp(p2p->pending_pd_devaddr,
3206                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
3207                         continue;
3208                 if (!dev->req_config_methods)
3209                         continue;
3210
3211                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3212                         MACSTR " (config methods 0x%x)",
3213                         MAC2STR(dev->info.p2p_device_addr),
3214                         dev->req_config_methods);
3215                 p2p_send_prov_disc_req(p2p, dev,
3216                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
3217                                        p2p->pd_force_freq);
3218                 return;
3219         }
3220 }
3221
3222
3223 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3224 {
3225         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3226                 success);
3227
3228         /*
3229          * Postpone resetting the pending action state till after we actually
3230          * time out. This allows us to take some action like notifying any
3231          * interested parties about no response to the request.
3232          *
3233          * When the timer (below) goes off we check in IDLE, SEARCH, or
3234          * LISTEN_ONLY state, which are the only allowed states to issue a PD
3235          * requests in, if this was still pending and then raise notification.
3236          */
3237
3238         if (!success) {
3239                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3240
3241                 if (p2p->user_initiated_pd &&
3242                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3243                 {
3244                         /* Retry request from timeout to avoid busy loops */
3245                         p2p->pending_action_state = P2P_PENDING_PD;
3246                         p2p_set_timeout(p2p, 0, 50000);
3247                 } else if (p2p->state != P2P_IDLE)
3248                         p2p_continue_find(p2p);
3249                 else if (p2p->user_initiated_pd) {
3250                         p2p->pending_action_state = P2P_PENDING_PD;
3251                         p2p_set_timeout(p2p, 0, 300000);
3252                 }
3253                 return;
3254         }
3255
3256         /*
3257          * This postponing, of resetting pending_action_state, needs to be
3258          * done only for user initiated PD requests and not internal ones.
3259          */
3260         if (p2p->user_initiated_pd)
3261                 p2p->pending_action_state = P2P_PENDING_PD;
3262         else
3263                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3264
3265         /* Wait for response from the peer */
3266         if (p2p->state == P2P_SEARCH)
3267                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3268         p2p_set_timeout(p2p, 0, 200000);
3269 }
3270
3271
3272 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3273                          struct os_reltime *rx_time, int level, const u8 *ies,
3274                          size_t ies_len)
3275 {
3276         if (os_reltime_before(rx_time, &p2p->find_start)) {
3277                 /*
3278                  * The driver may have cached (e.g., in cfg80211 BSS table) the
3279                  * scan results for relatively long time. To avoid reporting
3280                  * stale information, update P2P peers only based on results
3281                  * that have based on frames received after the last p2p_find
3282                  * operation was started.
3283                  */
3284                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3285                         " (rx_time=%u.%06u)",
3286                         MAC2STR(bssid), (unsigned int) rx_time->sec,
3287                         (unsigned int) rx_time->usec);
3288                 return 0;
3289         }
3290
3291         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3292
3293         return 0;
3294 }
3295
3296
3297 void p2p_scan_res_handled(struct p2p_data *p2p)
3298 {
3299         if (!p2p->p2p_scan_running) {
3300                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3301         }
3302         p2p->p2p_scan_running = 0;
3303         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3304
3305         if (p2p_run_after_scan(p2p))
3306                 return;
3307         if (p2p->state == P2P_SEARCH)
3308                 p2p_continue_find(p2p);
3309 }
3310
3311
3312 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3313 {
3314         u8 dev_capab;
3315         u8 *len;
3316
3317 #ifdef CONFIG_WIFI_DISPLAY
3318         if (p2p->wfd_ie_probe_req)
3319                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3320 #endif /* CONFIG_WIFI_DISPLAY */
3321
3322         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3323                 wpabuf_put_buf(ies,
3324                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3325
3326         len = p2p_buf_add_ie_hdr(ies);
3327
3328         dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3329
3330         /* P2PS requires Probe Request frames to include SD bit */
3331         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3332                 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3333
3334         p2p_buf_add_capability(ies, dev_capab, 0);
3335
3336         if (dev_id)
3337                 p2p_buf_add_device_id(ies, dev_id);
3338         if (p2p->cfg->reg_class && p2p->cfg->channel)
3339                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3340                                            p2p->cfg->reg_class,
3341                                            p2p->cfg->channel);
3342         if (p2p->ext_listen_interval)
3343                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3344                                               p2p->ext_listen_interval);
3345
3346         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3347                 p2p_buf_add_service_hash(ies, p2p);
3348
3349         /* TODO: p2p_buf_add_operating_channel() if GO */
3350         p2p_buf_update_ie_hdr(ies, len);
3351 }
3352
3353
3354 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3355 {
3356         size_t len = 100;
3357
3358 #ifdef CONFIG_WIFI_DISPLAY
3359         if (p2p && p2p->wfd_ie_probe_req)
3360                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3361 #endif /* CONFIG_WIFI_DISPLAY */
3362
3363         if (p2p && p2p->vendor_elem &&
3364             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3365                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3366
3367         return len;
3368 }
3369
3370
3371 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3372 {
3373         return p2p_attr_text(p2p_ie, buf, end);
3374 }
3375
3376
3377 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3378 {
3379         struct p2p_device *dev = p2p->go_neg_peer;
3380         int timeout;
3381
3382         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3383
3384         if (dev == NULL) {
3385                 p2p_dbg(p2p, "No pending GO Negotiation");
3386                 return;
3387         }
3388
3389         if (success) {
3390                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3391                         p2p_set_state(p2p, P2P_IDLE);
3392                         return;
3393                 }
3394         } else if (dev->go_neg_req_sent) {
3395                 /* Cancel the increment from p2p_connect_send() on failure */
3396                 dev->go_neg_req_sent--;
3397         }
3398
3399         if (!success &&
3400             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3401             !is_zero_ether_addr(dev->member_in_go_dev)) {
3402                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3403                         MAC2STR(dev->info.p2p_device_addr));
3404                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3405                 p2p_send_dev_disc_req(p2p, dev);
3406                 return;
3407         }
3408
3409         /*
3410          * Use P2P find, if needed, to find the other device from its listen
3411          * channel.
3412          */
3413         p2p_set_state(p2p, P2P_CONNECT);
3414         timeout = success ? 500000 : 100000;
3415         if (!success && p2p->go_neg_peer &&
3416             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3417                 unsigned int r;
3418                 /*
3419                  * Peer is expected to wait our response and we will skip the
3420                  * listen phase. Add some randomness to the wait time here to
3421                  * make it less likely to hit cases where we could end up in
3422                  * sync with peer not listening.
3423                  */
3424                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3425                         r = 0;
3426                 timeout += r % 100000;
3427         }
3428         p2p_set_timeout(p2p, 0, timeout);
3429 }
3430
3431
3432 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3433 {
3434         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3435                 success);
3436         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3437                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3438                 return;
3439         }
3440         p2p_set_state(p2p, P2P_CONNECT);
3441         p2p_set_timeout(p2p, 0, 500000);
3442 }
3443
3444
3445 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3446                                        const u8 *addr)
3447 {
3448         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3449         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3450                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3451         } else if (success) {
3452                 struct p2p_device *dev;
3453                 dev = p2p_get_device(p2p, addr);
3454                 if (dev &&
3455                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3456                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3457         }
3458 }
3459
3460
3461 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3462                                enum p2p_send_action_result result)
3463 {
3464         struct p2p_device *dev;
3465
3466         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3467         if (result == P2P_SEND_ACTION_FAILED) {
3468                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3469                 p2p_go_neg_failed(p2p, -1);
3470                 return;
3471         }
3472
3473         dev = p2p->go_neg_peer;
3474
3475         if (result == P2P_SEND_ACTION_NO_ACK) {
3476                 /*
3477                  * Retry GO Negotiation Confirmation
3478                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3479                  * ACK for confirmation.
3480                  */
3481                 if (dev && dev->go_neg_conf &&
3482                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3483                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3484                                 dev->go_neg_conf_sent);
3485                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3486                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3487                                             dev->info.p2p_device_addr,
3488                                             p2p->cfg->dev_addr,
3489                                             dev->info.p2p_device_addr,
3490                                             wpabuf_head(dev->go_neg_conf),
3491                                             wpabuf_len(dev->go_neg_conf), 0) >=
3492                             0) {
3493                                 dev->go_neg_conf_sent++;
3494                                 return;
3495                         }
3496                         p2p_dbg(p2p, "Failed to re-send Action frame");
3497
3498                         /*
3499                          * Continue with the assumption that the first attempt
3500                          * went through and just the ACK frame was lost.
3501                          */
3502                 }
3503
3504                 /*
3505                  * It looks like the TX status for GO Negotiation Confirm is
3506                  * often showing failure even when the peer has actually
3507                  * received the frame. Since the peer may change channels
3508                  * immediately after having received the frame, we may not see
3509                  * an Ack for retries, so just dropping a single frame may
3510                  * trigger this. To allow the group formation to succeed if the
3511                  * peer did indeed receive the frame, continue regardless of
3512                  * the TX status.
3513                  */
3514                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3515         }
3516
3517         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3518
3519         if (dev == NULL)
3520                 return;
3521
3522         p2p_go_complete(p2p, dev);
3523 }
3524
3525
3526 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3527                         const u8 *src, const u8 *bssid,
3528                         enum p2p_send_action_result result)
3529 {
3530         enum p2p_pending_action_state state;
3531         int success;
3532
3533         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3534                 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3535                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3536                 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3537         success = result == P2P_SEND_ACTION_SUCCESS;
3538         state = p2p->pending_action_state;
3539         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3540         switch (state) {
3541         case P2P_NO_PENDING_ACTION:
3542                 if (p2p->send_action_in_progress) {
3543                         p2p->send_action_in_progress = 0;
3544                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3545                 }
3546                 if (p2p->after_scan_tx_in_progress) {
3547                         p2p->after_scan_tx_in_progress = 0;
3548                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3549                             p2p_run_after_scan(p2p))
3550                                 break;
3551                         if (p2p->state == P2P_SEARCH) {
3552                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3553                                 p2p_continue_find(p2p);
3554                         }
3555                 }
3556                 break;
3557         case P2P_PENDING_GO_NEG_REQUEST:
3558                 p2p_go_neg_req_cb(p2p, success);
3559                 break;
3560         case P2P_PENDING_GO_NEG_RESPONSE:
3561                 p2p_go_neg_resp_cb(p2p, success);
3562                 break;
3563         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3564                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3565                 break;
3566         case P2P_PENDING_GO_NEG_CONFIRM:
3567                 p2p_go_neg_conf_cb(p2p, result);
3568                 break;
3569         case P2P_PENDING_SD:
3570                 p2p_sd_cb(p2p, success);
3571                 break;
3572         case P2P_PENDING_PD:
3573                 p2p_prov_disc_cb(p2p, success);
3574                 break;
3575         case P2P_PENDING_INVITATION_REQUEST:
3576                 p2p_invitation_req_cb(p2p, success);
3577                 break;
3578         case P2P_PENDING_INVITATION_RESPONSE:
3579                 p2p_invitation_resp_cb(p2p, success);
3580                 break;
3581         case P2P_PENDING_DEV_DISC_REQUEST:
3582                 p2p_dev_disc_req_cb(p2p, success);
3583                 break;
3584         case P2P_PENDING_DEV_DISC_RESPONSE:
3585                 p2p_dev_disc_resp_cb(p2p, success);
3586                 break;
3587         case P2P_PENDING_GO_DISC_REQ:
3588                 p2p_go_disc_req_cb(p2p, success);
3589                 break;
3590         }
3591
3592         p2p->after_scan_tx_in_progress = 0;
3593 }
3594
3595
3596 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3597                    unsigned int duration)
3598 {
3599         if (freq == p2p->pending_client_disc_freq) {
3600                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3601                 p2p->pending_client_disc_freq = 0;
3602                 return;
3603         }
3604
3605         if (freq != p2p->pending_listen_freq) {
3606                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3607                         freq, duration, p2p->pending_listen_freq);
3608                 return;
3609         }
3610
3611         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3612                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3613                 p2p->pending_listen_freq);
3614         p2p->in_listen = 1;
3615         p2p->drv_in_listen = freq;
3616         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3617                 /*
3618                  * Add 20 msec extra wait to avoid race condition with driver
3619                  * remain-on-channel end event, i.e., give driver more time to
3620                  * complete the operation before our timeout expires.
3621                  */
3622                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3623                                 p2p->pending_listen_usec + 20000);
3624         }
3625
3626         p2p->pending_listen_freq = 0;
3627 }
3628
3629
3630 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3631 {
3632         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3633         p2p->drv_in_listen = 0;
3634         if (p2p->in_listen)
3635                 return 0; /* Internal timeout will trigger the next step */
3636
3637         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3638                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3639                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3640                         p2p_go_neg_failed(p2p, -1);
3641                         return 0;
3642                 }
3643
3644                 p2p_set_state(p2p, P2P_CONNECT);
3645                 p2p_connect_send(p2p, p2p->go_neg_peer);
3646                 return 1;
3647         } else if (p2p->state == P2P_SEARCH) {
3648                 if (p2p->p2p_scan_running) {
3649                          /*
3650                           * Search is already in progress. This can happen if
3651                           * an Action frame RX is reported immediately after
3652                           * the end of a remain-on-channel operation and the
3653                           * response frame to that is sent using an offchannel
3654                           * operation while in p2p_find. Avoid an attempt to
3655                           * restart a scan here.
3656                           */
3657                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3658                         return 1;
3659                 }
3660                 if (p2p->pending_listen_freq) {
3661                         /*
3662                          * Better wait a bit if the driver is unable to start
3663                          * offchannel operation for some reason. p2p_search()
3664                          * will be started from internal timeout.
3665                          */
3666                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3667                         p2p_set_timeout(p2p, 0, 100000);
3668                         return 1;
3669                 }
3670                 if (p2p->search_delay) {
3671                         p2p_dbg(p2p, "Delay search operation by %u ms",
3672                                 p2p->search_delay);
3673                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3674                                         (p2p->search_delay % 1000) * 1000);
3675                         return 1;
3676                 }
3677                 p2p_search(p2p);
3678                 return 1;
3679         }
3680
3681         return 0;
3682 }
3683
3684
3685 static void p2p_timeout_connect(struct p2p_data *p2p)
3686 {
3687         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3688         if (p2p->go_neg_peer &&
3689             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3690                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3691                 p2p_go_neg_failed(p2p, -1);
3692                 return;
3693         }
3694         if (p2p->go_neg_peer &&
3695             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3696             p2p->go_neg_peer->connect_reqs < 120) {
3697                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3698                 p2p_connect_send(p2p, p2p->go_neg_peer);
3699                 return;
3700         }
3701         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3702                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3703                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3704                 p2p_set_timeout(p2p, 0, 30000);
3705                 return;
3706         }
3707         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3708         p2p_listen_in_find(p2p, 0);
3709 }
3710
3711
3712 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3713 {
3714         if (p2p->go_neg_peer) {
3715                 if (p2p->drv_in_listen) {
3716                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3717                         return;
3718                 }
3719
3720                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3721                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3722                         p2p_go_neg_failed(p2p, -1);
3723                         return;
3724                 }
3725
3726                 p2p_set_state(p2p, P2P_CONNECT);
3727                 p2p_connect_send(p2p, p2p->go_neg_peer);
3728         } else
3729                 p2p_set_state(p2p, P2P_IDLE);
3730 }
3731
3732
3733 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3734 {
3735         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3736
3737         if (p2p->cfg->is_concurrent_session_active &&
3738             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3739                 p2p_set_timeout(p2p, 0, 500000);
3740         else
3741                 p2p_set_timeout(p2p, 0, 200000);
3742 }
3743
3744
3745 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3746 {
3747         struct p2p_device *dev = p2p->go_neg_peer;
3748
3749         if (dev == NULL) {
3750                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3751                 return;
3752         }
3753
3754         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3755         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3756         p2p_listen_in_find(p2p, 0);
3757 }
3758
3759
3760 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3761 {
3762         p2p_dbg(p2p, "Service Discovery Query timeout");
3763         if (p2p->sd_peer) {
3764                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3765                 p2p->sd_peer = NULL;
3766         }
3767         p2p_continue_find(p2p);
3768 }
3769
3770
3771 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3772 {
3773         p2p_dbg(p2p, "Provision Discovery Request timeout");
3774         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3775         p2p_continue_find(p2p);
3776 }
3777
3778
3779 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3780 {
3781         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3782
3783         /*
3784          * For user initiated PD requests that we have not gotten any responses
3785          * for while in IDLE state, we retry them a couple of times before
3786          * giving up.
3787          */
3788         if (!p2p->user_initiated_pd)
3789                 return;
3790
3791         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3792
3793         if (p2p->pd_retries) {
3794                 p2p->pd_retries--;
3795                 p2p_retry_pd(p2p);
3796         } else {
3797                 struct p2p_device *dev;
3798                 int for_join = 0;
3799
3800                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3801                         if (os_memcmp(p2p->pending_pd_devaddr,
3802                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3803                                 continue;
3804                         if (dev->req_config_methods &&
3805                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3806                                 for_join = 1;
3807                 }
3808
3809                 if (p2p->cfg->prov_disc_fail)
3810                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3811                                                  p2p->pending_pd_devaddr,
3812                                                  for_join ?
3813                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3814                                                  P2P_PROV_DISC_TIMEOUT);
3815                 p2p_reset_pending_pd(p2p);
3816         }
3817 }
3818
3819
3820 static void p2p_timeout_invite(struct p2p_data *p2p)
3821 {
3822         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3823         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3824         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3825                 /*
3826                  * Better remain on operating channel instead of listen channel
3827                  * when running a group.
3828                  */
3829                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3830                 p2p_set_timeout(p2p, 0, 100000);
3831                 return;
3832         }
3833         p2p_listen_in_find(p2p, 0);
3834 }
3835
3836
3837 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3838 {
3839         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3840                 p2p_set_state(p2p, P2P_INVITE);
3841                 p2p_invite_send(p2p, p2p->invite_peer,
3842                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3843         } else {
3844                 if (p2p->invite_peer) {
3845                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3846                         if (p2p->cfg->invitation_result)
3847                                 p2p->cfg->invitation_result(
3848                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3849                                         p2p->invite_peer->info.p2p_device_addr,
3850                                         0, 0);
3851                 }
3852                 p2p_set_state(p2p, P2P_IDLE);
3853         }
3854 }
3855
3856
3857 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3858 {
3859         struct p2p_data *p2p = eloop_ctx;
3860
3861         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3862
3863         p2p->in_listen = 0;
3864         if (p2p->drv_in_listen) {
3865                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3866                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3867         }
3868
3869         switch (p2p->state) {
3870         case P2P_IDLE:
3871                 /* Check if we timed out waiting for PD req */
3872                 if (p2p->pending_action_state == P2P_PENDING_PD)
3873                         p2p_timeout_prov_disc_req(p2p);
3874                 break;
3875         case P2P_SEARCH:
3876                 /* Check if we timed out waiting for PD req */
3877                 if (p2p->pending_action_state == P2P_PENDING_PD)
3878                         p2p_timeout_prov_disc_req(p2p);
3879                 if (p2p->search_delay && !p2p->in_search_delay) {
3880                         p2p_dbg(p2p, "Delay search operation by %u ms",
3881                                 p2p->search_delay);
3882                         p2p->in_search_delay = 1;
3883                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3884                                         (p2p->search_delay % 1000) * 1000);
3885                         break;
3886                 }
3887                 p2p->in_search_delay = 0;
3888                 p2p_search(p2p);
3889                 break;
3890         case P2P_CONNECT:
3891                 p2p_timeout_connect(p2p);
3892                 break;
3893         case P2P_CONNECT_LISTEN:
3894                 p2p_timeout_connect_listen(p2p);
3895                 break;
3896         case P2P_GO_NEG:
3897                 break;
3898         case P2P_LISTEN_ONLY:
3899                 /* Check if we timed out waiting for PD req */
3900                 if (p2p->pending_action_state == P2P_PENDING_PD)
3901                         p2p_timeout_prov_disc_req(p2p);
3902
3903                 if (p2p->ext_listen_only) {
3904                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3905                         p2p->ext_listen_only = 0;
3906                         p2p_set_state(p2p, P2P_IDLE);
3907                 }
3908                 break;
3909         case P2P_WAIT_PEER_CONNECT:
3910                 p2p_timeout_wait_peer_connect(p2p);
3911                 break;
3912         case P2P_WAIT_PEER_IDLE:
3913                 p2p_timeout_wait_peer_idle(p2p);
3914                 break;
3915         case P2P_SD_DURING_FIND:
3916                 p2p_timeout_sd_during_find(p2p);
3917                 break;
3918         case P2P_PROVISIONING:
3919                 break;
3920         case P2P_PD_DURING_FIND:
3921                 p2p_timeout_prov_disc_during_find(p2p);
3922                 break;
3923         case P2P_INVITE:
3924                 p2p_timeout_invite(p2p);
3925                 break;
3926         case P2P_INVITE_LISTEN:
3927                 p2p_timeout_invite_listen(p2p);
3928                 break;
3929         }
3930 }
3931
3932
3933 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3934 {
3935         struct p2p_device *dev;
3936
3937         dev = p2p_get_device(p2p, peer_addr);
3938         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3939                 MACSTR, MAC2STR(peer_addr));
3940         if (dev == NULL) {
3941                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3942                 return -1;
3943         }
3944         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3945         dev->flags |= P2P_DEV_USER_REJECTED;
3946         return 0;
3947 }
3948
3949
3950 const char * p2p_wps_method_text(enum p2p_wps_method method)
3951 {
3952         switch (method) {
3953         case WPS_NOT_READY:
3954                 return "not-ready";
3955         case WPS_PIN_DISPLAY:
3956                 return "Display";
3957         case WPS_PIN_KEYPAD:
3958                 return "Keypad";
3959         case WPS_PBC:
3960                 return "PBC";
3961         case WPS_NFC:
3962                 return "NFC";
3963         case WPS_P2PS:
3964                 return "P2PS";
3965         }
3966
3967         return "??";
3968 }
3969
3970
3971 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3972 {
3973         switch (go_state) {
3974         case UNKNOWN_GO:
3975                 return "unknown";
3976         case LOCAL_GO:
3977                 return "local";
3978         case  REMOTE_GO:
3979                 return "remote";
3980         }
3981
3982         return "??";
3983 }
3984
3985
3986 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3987                                                const u8 *addr, int next)
3988 {
3989         struct p2p_device *dev;
3990
3991         if (addr)
3992                 dev = p2p_get_device(p2p, addr);
3993         else
3994                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3995
3996         if (dev && next) {
3997                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3998                 if (&dev->list == &p2p->devices)
3999                         dev = NULL;
4000         }
4001
4002         if (dev == NULL)
4003                 return NULL;
4004
4005         return &dev->info;
4006 }
4007
4008
4009 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4010                           char *buf, size_t buflen)
4011 {
4012         struct p2p_device *dev;
4013         int res;
4014         char *pos, *end;
4015         struct os_reltime now;
4016
4017         if (info == NULL)
4018                 return -1;
4019
4020         dev = (struct p2p_device *) (((u8 *) info) -
4021                                      offsetof(struct p2p_device, info));
4022
4023         pos = buf;
4024         end = buf + buflen;
4025
4026         os_get_reltime(&now);
4027         res = os_snprintf(pos, end - pos,
4028                           "age=%d\n"
4029                           "listen_freq=%d\n"
4030                           "wps_method=%s\n"
4031                           "interface_addr=" MACSTR "\n"
4032                           "member_in_go_dev=" MACSTR "\n"
4033                           "member_in_go_iface=" MACSTR "\n"
4034                           "go_neg_req_sent=%d\n"
4035                           "go_state=%s\n"
4036                           "dialog_token=%u\n"
4037                           "intended_addr=" MACSTR "\n"
4038                           "country=%c%c\n"
4039                           "oper_freq=%d\n"
4040                           "req_config_methods=0x%x\n"
4041                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4042                           "status=%d\n"
4043                           "invitation_reqs=%u\n",
4044                           (int) (now.sec - dev->last_seen.sec),
4045                           dev->listen_freq,
4046                           p2p_wps_method_text(dev->wps_method),
4047                           MAC2STR(dev->interface_addr),
4048                           MAC2STR(dev->member_in_go_dev),
4049                           MAC2STR(dev->member_in_go_iface),
4050                           dev->go_neg_req_sent,
4051                           p2p_go_state_text(dev->go_state),
4052                           dev->dialog_token,
4053                           MAC2STR(dev->intended_addr),
4054                           dev->country[0] ? dev->country[0] : '_',
4055                           dev->country[1] ? dev->country[1] : '_',
4056                           dev->oper_freq,
4057                           dev->req_config_methods,
4058                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4059                           "[PROBE_REQ_ONLY]" : "",
4060                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4061                           dev->flags & P2P_DEV_NOT_YET_READY ?
4062                           "[NOT_YET_READY]" : "",
4063                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4064                           "[PD_PEER_DISPLAY]" : "",
4065                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4066                           "[PD_PEER_KEYPAD]" : "",
4067                           dev->flags & P2P_DEV_USER_REJECTED ?
4068                           "[USER_REJECTED]" : "",
4069                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4070                           "[PEER_WAITING_RESPONSE]" : "",
4071                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4072                           "[PREFER_PERSISTENT_GROUP]" : "",
4073                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4074                           "[WAIT_GO_NEG_RESPONSE]" : "",
4075                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4076                           "[WAIT_GO_NEG_CONFIRM]" : "",
4077                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4078                           "[GROUP_CLIENT_ONLY]" : "",
4079                           dev->flags & P2P_DEV_FORCE_FREQ ?
4080                           "[FORCE_FREQ]" : "",
4081                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
4082                           "[PD_FOR_JOIN]" : "",
4083                           dev->status,
4084                           dev->invitation_reqs);
4085         if (os_snprintf_error(end - pos, res))
4086                 return pos - buf;
4087         pos += res;
4088
4089         if (dev->ext_listen_period) {
4090                 res = os_snprintf(pos, end - pos,
4091                                   "ext_listen_period=%u\n"
4092                                   "ext_listen_interval=%u\n",
4093                                   dev->ext_listen_period,
4094                                   dev->ext_listen_interval);
4095                 if (os_snprintf_error(end - pos, res))
4096                         return pos - buf;
4097                 pos += res;
4098         }
4099
4100         if (dev->oper_ssid_len) {
4101                 res = os_snprintf(pos, end - pos,
4102                                   "oper_ssid=%s\n",
4103                                   wpa_ssid_txt(dev->oper_ssid,
4104                                                dev->oper_ssid_len));
4105                 if (os_snprintf_error(end - pos, res))
4106                         return pos - buf;
4107                 pos += res;
4108         }
4109
4110 #ifdef CONFIG_WIFI_DISPLAY
4111         if (dev->info.wfd_subelems) {
4112                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4113                 if (os_snprintf_error(end - pos, res))
4114                         return pos - buf;
4115                 pos += res;
4116
4117                 pos += wpa_snprintf_hex(pos, end - pos,
4118                                         wpabuf_head(dev->info.wfd_subelems),
4119                                         wpabuf_len(dev->info.wfd_subelems));
4120
4121                 res = os_snprintf(pos, end - pos, "\n");
4122                 if (os_snprintf_error(end - pos, res))
4123                         return pos - buf;
4124                 pos += res;
4125         }
4126 #endif /* CONFIG_WIFI_DISPLAY */
4127
4128         return pos - buf;
4129 }
4130
4131
4132 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4133 {
4134         return p2p_get_device(p2p, addr) != NULL;
4135 }
4136
4137
4138 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4139 {
4140         if (enabled) {
4141                 p2p_dbg(p2p, "Client discoverability enabled");
4142                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4143         } else {
4144                 p2p_dbg(p2p, "Client discoverability disabled");
4145                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4146         }
4147 }
4148
4149
4150 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4151                                               u32 duration2, u32 interval2)
4152 {
4153         struct wpabuf *req;
4154         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4155         u8 *len;
4156
4157         req = wpabuf_alloc(100);
4158         if (req == NULL)
4159                 return NULL;
4160
4161         if (duration1 || interval1) {
4162                 os_memset(&desc1, 0, sizeof(desc1));
4163                 desc1.count_type = 1;
4164                 desc1.duration = duration1;
4165                 desc1.interval = interval1;
4166                 ptr1 = &desc1;
4167
4168                 if (duration2 || interval2) {
4169                         os_memset(&desc2, 0, sizeof(desc2));
4170                         desc2.count_type = 2;
4171                         desc2.duration = duration2;
4172                         desc2.interval = interval2;
4173                         ptr2 = &desc2;
4174                 }
4175         }
4176
4177         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4178         len = p2p_buf_add_ie_hdr(req);
4179         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4180         p2p_buf_update_ie_hdr(req, len);
4181
4182         return req;
4183 }
4184
4185
4186 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4187                      const u8 *own_interface_addr, unsigned int freq,
4188                      u32 duration1, u32 interval1, u32 duration2,
4189                      u32 interval2)
4190 {
4191         struct wpabuf *req;
4192
4193         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4194                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4195                 "dur2=%u int2=%u",
4196                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4197                 freq, duration1, interval1, duration2, interval2);
4198
4199         req = p2p_build_presence_req(duration1, interval1, duration2,
4200                                      interval2);
4201         if (req == NULL)
4202                 return -1;
4203
4204         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4205         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4206                             go_interface_addr,
4207                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4208                 p2p_dbg(p2p, "Failed to send Action frame");
4209         }
4210         wpabuf_free(req);
4211
4212         return 0;
4213 }
4214
4215
4216 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4217                                                size_t noa_len, u8 dialog_token)
4218 {
4219         struct wpabuf *resp;
4220         u8 *len;
4221
4222         resp = wpabuf_alloc(100 + noa_len);
4223         if (resp == NULL)
4224                 return NULL;
4225
4226         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4227         len = p2p_buf_add_ie_hdr(resp);
4228         p2p_buf_add_status(resp, status);
4229         if (noa) {
4230                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4231                 wpabuf_put_le16(resp, noa_len);
4232                 wpabuf_put_data(resp, noa, noa_len);
4233         } else
4234                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4235         p2p_buf_update_ie_hdr(resp, len);
4236
4237         return resp;
4238 }
4239
4240
4241 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4242                                      const u8 *sa, const u8 *data, size_t len,
4243                                      int rx_freq)
4244 {
4245         struct p2p_message msg;
4246         u8 status;
4247         struct wpabuf *resp;
4248         size_t g;
4249         struct p2p_group *group = NULL;
4250         int parsed = 0;
4251         u8 noa[50];
4252         int noa_len;
4253
4254         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4255
4256         for (g = 0; g < p2p->num_groups; g++) {
4257                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4258                               ETH_ALEN) == 0) {
4259                         group = p2p->groups[g];
4260                         break;
4261                 }
4262         }
4263         if (group == NULL) {
4264                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4265                         MACSTR, MAC2STR(da));
4266                 return;
4267         }
4268
4269         if (p2p_parse(data, len, &msg) < 0) {
4270                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4271                 status = P2P_SC_FAIL_INVALID_PARAMS;
4272                 goto fail;
4273         }
4274         parsed = 1;
4275
4276         if (msg.noa == NULL) {
4277                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4278                 status = P2P_SC_FAIL_INVALID_PARAMS;
4279                 goto fail;
4280         }
4281
4282         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4283
4284 fail:
4285         if (p2p->cfg->get_noa)
4286                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4287                                             sizeof(noa));
4288         else
4289                 noa_len = -1;
4290         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4291                                        noa_len > 0 ? noa_len : 0,
4292                                        msg.dialog_token);
4293         if (parsed)
4294                 p2p_parse_free(&msg);
4295         if (resp == NULL)
4296                 return;
4297
4298         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4299         if (p2p_send_action(p2p, rx_freq, sa, da, da,
4300                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4301                 p2p_dbg(p2p, "Failed to send Action frame");
4302         }
4303         wpabuf_free(resp);
4304 }
4305
4306
4307 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4308                                       const u8 *sa, const u8 *data, size_t len)
4309 {
4310         struct p2p_message msg;
4311
4312         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4313
4314         if (p2p_parse(data, len, &msg) < 0) {
4315                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4316                 return;
4317         }
4318
4319         if (msg.status == NULL || msg.noa == NULL) {
4320                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4321                 p2p_parse_free(&msg);
4322                 return;
4323         }
4324
4325         if (p2p->cfg->presence_resp) {
4326                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4327                                         msg.noa, msg.noa_len);
4328         }
4329
4330         if (*msg.status) {
4331                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4332                         *msg.status);
4333                 p2p_parse_free(&msg);
4334                 return;
4335         }
4336
4337         p2p_dbg(p2p, "P2P Presence Request was accepted");
4338         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4339                     msg.noa, msg.noa_len);
4340         /* TODO: process NoA */
4341         p2p_parse_free(&msg);
4342 }
4343
4344
4345 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4346 {
4347         struct p2p_data *p2p = eloop_ctx;
4348
4349         if (p2p->ext_listen_interval) {
4350                 /* Schedule next extended listen timeout */
4351                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4352                                        p2p->ext_listen_interval_usec,
4353                                        p2p_ext_listen_timeout, p2p, NULL);
4354         }
4355
4356         if ((p2p->cfg->is_p2p_in_progress &&
4357              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4358             (p2p->pending_action_state == P2P_PENDING_PD &&
4359              p2p->pd_retries > 0)) {
4360                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4361                         p2p_state_txt(p2p->state));
4362                 return;
4363         }
4364
4365         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4366                 /*
4367                  * This should not really happen, but it looks like the Listen
4368                  * command may fail is something else (e.g., a scan) was
4369                  * running at an inconvenient time. As a workaround, allow new
4370                  * Extended Listen operation to be started.
4371                  */
4372                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4373                 p2p->ext_listen_only = 0;
4374                 p2p_set_state(p2p, P2P_IDLE);
4375         }
4376
4377         if (p2p->state != P2P_IDLE) {
4378                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4379                 return;
4380         }
4381
4382         p2p_dbg(p2p, "Extended Listen timeout");
4383         p2p->ext_listen_only = 1;
4384         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4385                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4386                 p2p->ext_listen_only = 0;
4387         }
4388 }
4389
4390
4391 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4392                    unsigned int interval)
4393 {
4394         if (period > 65535 || interval > 65535 || period > interval ||
4395             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4396                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4397                         period, interval);
4398                 return -1;
4399         }
4400
4401         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4402
4403         if (interval == 0) {
4404                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4405                 p2p->ext_listen_period = 0;
4406                 p2p->ext_listen_interval = 0;
4407                 return 0;
4408         }
4409
4410         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4411                 period, interval);
4412         p2p->ext_listen_period = period;
4413         p2p->ext_listen_interval = interval;
4414         p2p->ext_listen_interval_sec = interval / 1000;
4415         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4416
4417         eloop_register_timeout(p2p->ext_listen_interval_sec,
4418                                p2p->ext_listen_interval_usec,
4419                                p2p_ext_listen_timeout, p2p, NULL);
4420
4421         return 0;
4422 }
4423
4424
4425 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4426                       const u8 *ie, size_t ie_len)
4427 {
4428         struct p2p_message msg;
4429
4430         if (bssid == NULL || ie == NULL)
4431                 return;
4432
4433         os_memset(&msg, 0, sizeof(msg));
4434         if (p2p_parse_ies(ie, ie_len, &msg))
4435                 return;
4436         if (msg.minor_reason_code == NULL) {
4437                 p2p_parse_free(&msg);
4438                 return;
4439         }
4440
4441         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4442                 " reason_code=%u minor_reason_code=%u",
4443                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4444
4445         p2p_parse_free(&msg);
4446 }
4447
4448
4449 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4450                         const u8 *ie, size_t ie_len)
4451 {
4452         struct p2p_message msg;
4453
4454         if (bssid == NULL || ie == NULL)
4455                 return;
4456
4457         os_memset(&msg, 0, sizeof(msg));
4458         if (p2p_parse_ies(ie, ie_len, &msg))
4459                 return;
4460         if (msg.minor_reason_code == NULL) {
4461                 p2p_parse_free(&msg);
4462                 return;
4463         }
4464
4465         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4466                 " reason_code=%u minor_reason_code=%u",
4467                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4468
4469         p2p_parse_free(&msg);
4470 }
4471
4472
4473 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4474 {
4475         if (enabled) {
4476                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4477                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4478         } else {
4479                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4480                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4481         }
4482 }
4483
4484
4485 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4486                                  u8 *op_channel)
4487 {
4488         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4489 }
4490
4491
4492 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4493                            u8 forced)
4494 {
4495         if (p2p_channel_to_freq(reg_class, channel) < 0)
4496                 return -1;
4497
4498         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4499                 reg_class, channel);
4500
4501         /*
4502          * Listen channel was set in configuration or set by control interface;
4503          * cannot override it.
4504          */
4505         if (p2p->cfg->channel_forced && forced == 0)
4506                 return -1;
4507
4508         if (p2p->state == P2P_IDLE) {
4509                 p2p->cfg->reg_class = reg_class;
4510                 p2p->cfg->channel = channel;
4511                 p2p->cfg->channel_forced = forced;
4512         } else {
4513                 p2p_dbg(p2p, "Defer setting listen channel");
4514                 p2p->pending_reg_class = reg_class;
4515                 p2p->pending_channel = channel;
4516                 p2p->pending_channel_forced = forced;
4517         }
4518
4519         return 0;
4520 }
4521
4522
4523 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4524 {
4525         return p2p->cfg->channel;
4526 }
4527
4528
4529 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4530 {
4531         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4532         if (postfix == NULL) {
4533                 p2p->cfg->ssid_postfix_len = 0;
4534                 return 0;
4535         }
4536         if (len > sizeof(p2p->cfg->ssid_postfix))
4537                 return -1;
4538         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4539         p2p->cfg->ssid_postfix_len = len;
4540         return 0;
4541 }
4542
4543
4544 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4545                          int cfg_op_channel)
4546 {
4547         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4548                 return -1;
4549
4550         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4551                 op_reg_class, op_channel);
4552         p2p->cfg->op_reg_class = op_reg_class;
4553         p2p->cfg->op_channel = op_channel;
4554         p2p->cfg->cfg_op_channel = cfg_op_channel;
4555         return 0;
4556 }
4557
4558
4559 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4560                       const struct p2p_channel *pref_chan)
4561 {
4562         struct p2p_channel *n;
4563
4564         if (pref_chan) {
4565                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4566                 if (n == NULL)
4567                         return -1;
4568                 os_memcpy(n, pref_chan,
4569                           num_pref_chan * sizeof(struct p2p_channel));
4570         } else
4571                 n = NULL;
4572
4573         os_free(p2p->cfg->pref_chan);
4574         p2p->cfg->pref_chan = n;
4575         p2p->cfg->num_pref_chan = num_pref_chan;
4576
4577         return 0;
4578 }
4579
4580
4581 int p2p_set_no_go_freq(struct p2p_data *p2p,
4582                        const struct wpa_freq_range_list *list)
4583 {
4584         struct wpa_freq_range *tmp;
4585
4586         if (list == NULL || list->num == 0) {
4587                 os_free(p2p->no_go_freq.range);
4588                 p2p->no_go_freq.range = NULL;
4589                 p2p->no_go_freq.num = 0;
4590                 return 0;
4591         }
4592
4593         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4594         if (tmp == NULL)
4595                 return -1;
4596         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4597         os_free(p2p->no_go_freq.range);
4598         p2p->no_go_freq.range = tmp;
4599         p2p->no_go_freq.num = list->num;
4600         p2p_dbg(p2p, "Updated no GO chan list");
4601
4602         return 0;
4603 }
4604
4605
4606 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4607                            u8 *iface_addr)
4608 {
4609         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4610         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4611                 return -1;
4612         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4613         return 0;
4614 }
4615
4616
4617 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4618                            u8 *dev_addr)
4619 {
4620         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4621         if (dev == NULL)
4622                 return -1;
4623         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4624         return 0;
4625 }
4626
4627
4628 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4629 {
4630         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4631         if (is_zero_ether_addr(p2p->peer_filter))
4632                 p2p_dbg(p2p, "Disable peer filter");
4633         else
4634                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4635                         MAC2STR(p2p->peer_filter));
4636 }
4637
4638
4639 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4640 {
4641         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4642         if (p2p->cross_connect == enabled)
4643                 return;
4644         p2p->cross_connect = enabled;
4645         /* TODO: may need to tear down any action group where we are GO(?) */
4646 }
4647
4648
4649 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4650 {
4651         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4652         if (dev == NULL)
4653                 return -1;
4654         if (dev->oper_freq <= 0)
4655                 return -1;
4656         return dev->oper_freq;
4657 }
4658
4659
4660 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4661 {
4662         p2p_dbg(p2p, "Intra BSS distribution %s",
4663                 enabled ? "enabled" : "disabled");
4664         p2p->cfg->p2p_intra_bss = enabled;
4665 }
4666
4667
4668 void p2p_update_channel_list(struct p2p_data *p2p,
4669                              const struct p2p_channels *chan,
4670                              const struct p2p_channels *cli_chan)
4671 {
4672         p2p_dbg(p2p, "Update channel list");
4673         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4674         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4675         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4676                   sizeof(struct p2p_channels));
4677         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4678 }
4679
4680
4681 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4682                     const u8 *src, const u8 *bssid, const u8 *buf,
4683                     size_t len, unsigned int wait_time)
4684 {
4685         if (p2p->p2p_scan_running) {
4686                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4687                 if (p2p->after_scan_tx) {
4688                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4689                         os_free(p2p->after_scan_tx);
4690                 }
4691                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4692                                                len);
4693                 if (p2p->after_scan_tx == NULL)
4694                         return -1;
4695                 p2p->after_scan_tx->freq = freq;
4696                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4697                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4698                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4699                 p2p->after_scan_tx->len = len;
4700                 p2p->after_scan_tx->wait_time = wait_time;
4701                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4702                 return 0;
4703         }
4704
4705         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4706                                      buf, len, wait_time);
4707 }
4708
4709
4710 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4711                            int freq_overall)
4712 {
4713         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4714                 freq_24, freq_5, freq_overall);
4715         p2p->best_freq_24 = freq_24;
4716         p2p->best_freq_5 = freq_5;
4717         p2p->best_freq_overall = freq_overall;
4718 }
4719
4720
4721 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4722 {
4723         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4724         p2p->own_freq_preference = freq;
4725 }
4726
4727
4728 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4729 {
4730         if (p2p == NULL || p2p->go_neg_peer == NULL)
4731                 return NULL;
4732         return p2p->go_neg_peer->info.p2p_device_addr;
4733 }
4734
4735
4736 const struct p2p_peer_info *
4737 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4738 {
4739         struct p2p_device *dev;
4740
4741         if (addr) {
4742                 dev = p2p_get_device(p2p, addr);
4743                 if (!dev)
4744                         return NULL;
4745
4746                 if (!next) {
4747                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4748                                 return NULL;
4749
4750                         return &dev->info;
4751                 } else {
4752                         do {
4753                                 dev = dl_list_first(&dev->list,
4754                                                     struct p2p_device,
4755                                                     list);
4756                                 if (!dev || &dev->list == &p2p->devices)
4757                                         return NULL;
4758                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4759                 }
4760         } else {
4761                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4762                 if (!dev)
4763                         return NULL;
4764                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4765                         dev = dl_list_first(&dev->list,
4766                                             struct p2p_device,
4767                                             list);
4768                         if (!dev || &dev->list == &p2p->devices)
4769                                 return NULL;
4770                 }
4771         }
4772
4773         return &dev->info;
4774 }
4775
4776
4777 int p2p_in_progress(struct p2p_data *p2p)
4778 {
4779         if (p2p == NULL)
4780                 return 0;
4781         if (p2p->state == P2P_SEARCH)
4782                 return 2;
4783         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4784 }
4785
4786
4787 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4788                             u8 client_timeout)
4789 {
4790         if (p2p) {
4791                 p2p->go_timeout = go_timeout;
4792                 p2p->client_timeout = client_timeout;
4793         }
4794 }
4795
4796
4797 #ifdef CONFIG_WIFI_DISPLAY
4798
4799 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4800 {
4801         size_t g;
4802         struct p2p_group *group;
4803
4804         for (g = 0; g < p2p->num_groups; g++) {
4805                 group = p2p->groups[g];
4806                 p2p_group_force_beacon_update_ies(group);
4807         }
4808 }
4809
4810
4811 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4812 {
4813         wpabuf_free(p2p->wfd_ie_beacon);
4814         p2p->wfd_ie_beacon = ie;
4815         p2p_update_wfd_ie_groups(p2p);
4816         return 0;
4817 }
4818
4819
4820 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4821 {
4822         wpabuf_free(p2p->wfd_ie_probe_req);
4823         p2p->wfd_ie_probe_req = ie;
4824         return 0;
4825 }
4826
4827
4828 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4829 {
4830         wpabuf_free(p2p->wfd_ie_probe_resp);
4831         p2p->wfd_ie_probe_resp = ie;
4832         p2p_update_wfd_ie_groups(p2p);
4833         return 0;
4834 }
4835
4836
4837 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4838 {
4839         wpabuf_free(p2p->wfd_ie_assoc_req);
4840         p2p->wfd_ie_assoc_req = ie;
4841         return 0;
4842 }
4843
4844
4845 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4846 {
4847         wpabuf_free(p2p->wfd_ie_invitation);
4848         p2p->wfd_ie_invitation = ie;
4849         return 0;
4850 }
4851
4852
4853 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4854 {
4855         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4856         p2p->wfd_ie_prov_disc_req = ie;
4857         return 0;
4858 }
4859
4860
4861 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4862 {
4863         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4864         p2p->wfd_ie_prov_disc_resp = ie;
4865         return 0;
4866 }
4867
4868
4869 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4870 {
4871         wpabuf_free(p2p->wfd_ie_go_neg);
4872         p2p->wfd_ie_go_neg = ie;
4873         return 0;
4874 }
4875
4876
4877 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4878 {
4879         wpabuf_free(p2p->wfd_dev_info);
4880         if (elem) {
4881                 p2p->wfd_dev_info = wpabuf_dup(elem);
4882                 if (p2p->wfd_dev_info == NULL)
4883                         return -1;
4884         } else
4885                 p2p->wfd_dev_info = NULL;
4886
4887         return 0;
4888 }
4889
4890
4891 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4892 {
4893         wpabuf_free(p2p->wfd_assoc_bssid);
4894         if (elem) {
4895                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4896                 if (p2p->wfd_assoc_bssid == NULL)
4897                         return -1;
4898         } else
4899                 p2p->wfd_assoc_bssid = NULL;
4900
4901         return 0;
4902 }
4903
4904
4905 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4906                                   const struct wpabuf *elem)
4907 {
4908         wpabuf_free(p2p->wfd_coupled_sink_info);
4909         if (elem) {
4910                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4911                 if (p2p->wfd_coupled_sink_info == NULL)
4912                         return -1;
4913         } else
4914                 p2p->wfd_coupled_sink_info = NULL;
4915
4916         return 0;
4917 }
4918
4919 #endif /* CONFIG_WIFI_DISPLAY */
4920
4921
4922 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4923                      int max_disc_tu)
4924 {
4925         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4926                 return -1;
4927
4928         p2p->min_disc_int = min_disc_int;
4929         p2p->max_disc_int = max_disc_int;
4930         p2p->max_disc_tu = max_disc_tu;
4931         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4932                 min_disc_int, max_disc_int, max_disc_tu);
4933
4934         return 0;
4935 }
4936
4937
4938 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4939 {
4940         va_list ap;
4941         char buf[500];
4942
4943         if (!p2p->cfg->debug_print)
4944                 return;
4945
4946         va_start(ap, fmt);
4947         vsnprintf(buf, sizeof(buf), fmt, ap);
4948         buf[sizeof(buf) - 1] = '\0';
4949         va_end(ap);
4950         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4951 }
4952
4953
4954 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4955 {
4956         va_list ap;
4957         char buf[500];
4958
4959         if (!p2p->cfg->debug_print)
4960                 return;
4961
4962         va_start(ap, fmt);
4963         vsnprintf(buf, sizeof(buf), fmt, ap);
4964         buf[sizeof(buf) - 1] = '\0';
4965         va_end(ap);
4966         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4967 }
4968
4969
4970 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4971 {
4972         va_list ap;
4973         char buf[500];
4974
4975         if (!p2p->cfg->debug_print)
4976                 return;
4977
4978         va_start(ap, fmt);
4979         vsnprintf(buf, sizeof(buf), fmt, ap);
4980         buf[sizeof(buf) - 1] = '\0';
4981         va_end(ap);
4982         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4983 }
4984
4985
4986 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4987                              void (*peer_callback)(struct p2p_peer_info *peer,
4988                                                    void *user_data),
4989                              void *user_data)
4990 {
4991         struct p2p_device *dev, *n;
4992
4993         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4994                 peer_callback(&dev->info, user_data);
4995         }
4996 }
4997
4998
4999 #ifdef CONFIG_WPS_NFC
5000
5001 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5002                                               int client_freq,
5003                                               const u8 *go_dev_addr,
5004                                               const u8 *ssid, size_t ssid_len)
5005 {
5006         struct wpabuf *buf;
5007         u8 op_class, channel;
5008         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5009
5010         buf = wpabuf_alloc(1000);
5011         if (buf == NULL)
5012                 return NULL;
5013
5014         op_class = p2p->cfg->reg_class;
5015         channel = p2p->cfg->channel;
5016
5017         p2p_buf_add_capability(buf, p2p->dev_capab &
5018                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5019         p2p_buf_add_device_info(buf, p2p, NULL);
5020
5021         if (p2p->num_groups > 0) {
5022                 int freq = p2p_group_get_freq(p2p->groups[0]);
5023                 role = P2P_GO_IN_A_GROUP;
5024                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5025                         p2p_dbg(p2p,
5026                                 "Unknown GO operating frequency %d MHz for NFC handover",
5027                                 freq);
5028                         wpabuf_free(buf);
5029                         return NULL;
5030                 }
5031         } else if (client_freq > 0) {
5032                 role = P2P_CLIENT_IN_A_GROUP;
5033                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5034                         p2p_dbg(p2p,
5035                                 "Unknown client operating frequency %d MHz for NFC handover",
5036                                 client_freq);
5037                         wpabuf_free(buf);
5038                         return NULL;
5039                 }
5040         }
5041
5042         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5043                                        channel, role);
5044
5045         if (p2p->num_groups > 0) {
5046                 /* Limit number of clients to avoid very long message */
5047                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5048                 p2p_group_buf_add_id(p2p->groups[0], buf);
5049         } else if (client_freq > 0 &&
5050                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5051                    ssid && ssid_len > 0) {
5052                 /*
5053                  * Add the optional P2P Group ID to indicate in which group this
5054                  * device is a P2P Client.
5055                  */
5056                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5057         }
5058
5059         return buf;
5060 }
5061
5062
5063 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5064                                            int client_freq,
5065                                            const u8 *go_dev_addr,
5066                                            const u8 *ssid, size_t ssid_len)
5067 {
5068         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5069                                       ssid_len);
5070 }
5071
5072
5073 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5074                                            int client_freq,
5075                                            const u8 *go_dev_addr,
5076                                            const u8 *ssid, size_t ssid_len)
5077 {
5078         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5079                                       ssid_len);
5080 }
5081
5082
5083 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5084                                         struct p2p_nfc_params *params)
5085 {
5086         struct p2p_message msg;
5087         struct p2p_device *dev;
5088         const u8 *p2p_dev_addr;
5089         int freq;
5090         enum p2p_role_indication role;
5091
5092         params->next_step = NO_ACTION;
5093
5094         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5095                                    params->p2p_attr, params->p2p_len, &msg)) {
5096                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5097                 p2p_parse_free(&msg);
5098                 return -1;
5099         }
5100
5101         if (msg.p2p_device_addr)
5102                 p2p_dev_addr = msg.p2p_device_addr;
5103         else if (msg.device_id)
5104                 p2p_dev_addr = msg.device_id;
5105         else {
5106                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5107                 p2p_parse_free(&msg);
5108                 return -1;
5109         }
5110
5111         if (msg.oob_dev_password) {
5112                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5113                           msg.oob_dev_password_len);
5114                 params->oob_dev_pw_len = msg.oob_dev_password_len;
5115         }
5116
5117         dev = p2p_create_device(p2p, p2p_dev_addr);
5118         if (dev == NULL) {
5119                 p2p_parse_free(&msg);
5120                 return -1;
5121         }
5122
5123         params->peer = &dev->info;
5124
5125         os_get_reltime(&dev->last_seen);
5126         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5127         p2p_copy_wps_info(p2p, dev, 0, &msg);
5128
5129         if (!msg.oob_go_neg_channel) {
5130                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5131                 return -1;
5132         }
5133
5134         if (msg.oob_go_neg_channel[3] == 0 &&
5135             msg.oob_go_neg_channel[4] == 0)
5136                 freq = 0;
5137         else
5138                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5139                                            msg.oob_go_neg_channel[4]);
5140         if (freq < 0) {
5141                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5142                 return -1;
5143         }
5144         role = msg.oob_go_neg_channel[5];
5145
5146         if (role == P2P_GO_IN_A_GROUP) {
5147                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5148                 params->go_freq = freq;
5149         } else if (role == P2P_CLIENT_IN_A_GROUP) {
5150                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5151                         freq);
5152                 params->go_freq = freq;
5153         } else
5154                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5155         dev->oob_go_neg_freq = freq;
5156
5157         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5158                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5159                                            p2p->cfg->channel);
5160                 if (freq < 0) {
5161                         p2p_dbg(p2p, "Own listen channel not known");
5162                         return -1;
5163                 }
5164                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5165                 dev->oob_go_neg_freq = freq;
5166         }
5167
5168         if (msg.group_id) {
5169                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5170                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5171                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5172                           params->go_ssid_len);
5173         }
5174
5175         if (dev->flags & P2P_DEV_USER_REJECTED) {
5176                 p2p_dbg(p2p, "Do not report rejected device");
5177                 p2p_parse_free(&msg);
5178                 return 0;
5179         }
5180
5181         if (!(dev->flags & P2P_DEV_REPORTED)) {
5182                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5183                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
5184                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5185         }
5186         p2p_parse_free(&msg);
5187
5188         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5189                 params->next_step = BOTH_GO;
5190         else if (role == P2P_GO_IN_A_GROUP)
5191                 params->next_step = JOIN_GROUP;
5192         else if (role == P2P_CLIENT_IN_A_GROUP) {
5193                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5194                 params->next_step = PEER_CLIENT;
5195         } else if (p2p->num_groups > 0)
5196                 params->next_step = AUTH_JOIN;
5197         else if (params->sel)
5198                 params->next_step = INIT_GO_NEG;
5199         else
5200                 params->next_step = RESP_GO_NEG;
5201
5202         return 0;
5203 }
5204
5205
5206 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5207                                       int go_intent,
5208                                       const u8 *own_interface_addr)
5209 {
5210
5211         p2p->authorized_oob_dev_pw_id = dev_pw_id;
5212         if (dev_pw_id == 0) {
5213                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5214                 return;
5215         }
5216
5217         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5218                 dev_pw_id);
5219
5220         p2p->go_intent = go_intent;
5221         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5222 }
5223
5224 #endif /* CONFIG_WPS_NFC */
5225
5226
5227 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5228 {
5229         if (len < 8 || len > 63)
5230                 return -1;
5231         p2p->cfg->passphrase_len = len;
5232         return 0;
5233 }
5234
5235
5236 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5237 {
5238         p2p->vendor_elem = vendor_elem;
5239 }
5240
5241
5242 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5243 {
5244         struct p2p_data *p2p = eloop_ctx;
5245
5246         p2p_dbg(p2p,
5247                 "Timeout on waiting peer to become ready for GO Negotiation");
5248         p2p_go_neg_failed(p2p, -1);
5249 }