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 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
 163 {
 164         if (p2p && intended_addr)
 165                 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
 166 }
 167
 168
 169 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 170 {
 171         struct p2p_device *dev = NULL;
 172
 173         if (!addr || !p2p)
 174                 return 0;
 175
 176         dev = p2p_get_device(p2p, addr);
 177         if (dev)
 178                 return dev->wps_prov_info;
 179         else
 180                 return 0;
 181 }
 182
 183
 184 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 185 {
 186         struct p2p_device *dev = NULL;
 187
 188         if (!addr || !p2p)
 189                 return;
 190
 191         dev = p2p_get_device(p2p, addr);
 192         if (dev)
 193                 dev->wps_prov_info = 0;
 194 }
 195
 196
 197 void p2p_set_state(struct p2p_data *p2p, int new_state)
 198 {
 199         p2p_dbg(p2p, "State %s -> %s",
 200                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 201         p2p->state = new_state;
 202
 203         if (new_state == P2P_IDLE && p2p->pending_channel) {
 204                 p2p_dbg(p2p, "Apply change in listen channel");
 205                 p2p->cfg->reg_class = p2p->pending_reg_class;
 206                 p2p->cfg->channel = p2p->pending_channel;
 207                 p2p->pending_reg_class = 0;
 208                 p2p->pending_channel = 0;
 209         }
 210 }
 211
 212
 213 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 214 {
 215         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 216                 p2p_state_txt(p2p->state), sec, usec);
 217         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 218         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 219 }
 220
 221
 222 void p2p_clear_timeout(struct p2p_data *p2p)
 223 {
 224         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 225         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 226 }
 227
 228
 229 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
 230 {
 231         struct p2p_go_neg_results res;
 232         struct p2p_device *peer = p2p->go_neg_peer;
 233
 234         if (!peer)
 235                 return;
 236
 237         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 238         if (p2p->state != P2P_SEARCH) {
 239                 /*
 240                  * Clear timeouts related to GO Negotiation if no new p2p_find
 241                  * has been started.
 242                  */
 243                 p2p_clear_timeout(p2p);
 244                 p2p_set_state(p2p, P2P_IDLE);
 245         }
 246
 247         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 248         peer->wps_method = WPS_NOT_READY;
 249         peer->oob_pw_id = 0;
 250         wpabuf_free(peer->go_neg_conf);
 251         peer->go_neg_conf = NULL;
 252         p2p->go_neg_peer = NULL;
 253
 254         os_memset(&res, 0, sizeof(res));
 255         res.status = status;
 256         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 257         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 258         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 259 }
 260
 261
 262 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 263 {
 264         unsigned int r, tu;
 265         int freq;
 266         struct wpabuf *ies;
 267
 268         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 269                 p2p_state_txt(p2p->state));
 270
 271         if (p2p->pending_listen_freq) {
 272                 /* We have a pending p2p_listen request */
 273                 p2p_dbg(p2p, "p2p_listen command pending already");
 274                 return;
 275         }
 276
 277         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 278         if (freq < 0) {
 279                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 280                 return;
 281         }
 282
 283         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 284                 r = 0;
 285         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 286               p2p->min_disc_int) * 100;
 287         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 288                 tu = p2p->max_disc_tu;
 289         if (!dev_disc && tu < 100)
 290                 tu = 100; /* Need to wait in non-device discovery use cases */
 291         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 292                 tu = p2p->cfg->max_listen * 1000 / 1024;
 293
 294         if (tu == 0) {
 295                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 296                 p2p_set_timeout(p2p, 0, 0);
 297                 return;
 298         }
 299
 300         ies = p2p_build_probe_resp_ies(p2p);
 301         if (ies == NULL)
 302                 return;
 303
 304         p2p->pending_listen_freq = freq;
 305         p2p->pending_listen_sec = 0;
 306         p2p->pending_listen_usec = 1024 * tu;
 307
 308         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 309                     ies) < 0) {
 310                 p2p_dbg(p2p, "Failed to start listen mode");
 311                 p2p->pending_listen_freq = 0;
 312         }
 313         wpabuf_free(ies);
 314 }
 315
 316
 317 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 318 {
 319         int freq;
 320         struct wpabuf *ies;
 321
 322         p2p_dbg(p2p, "Going to listen(only) state");
 323
 324         if (p2p->pending_listen_freq) {
 325                 /* We have a pending p2p_listen request */
 326                 p2p_dbg(p2p, "p2p_listen command pending already");
 327                 return -1;
 328         }
 329
 330         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 331         if (freq < 0) {
 332                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 333                 return -1;
 334         }
 335
 336         p2p->pending_listen_sec = timeout / 1000;
 337         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 338
 339         if (p2p->p2p_scan_running) {
 340                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 341                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 342                         return 0;
 343                 }
 344                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 345                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 346                 return 0;
 347         }
 348
 349         ies = p2p_build_probe_resp_ies(p2p);
 350         if (ies == NULL)
 351                 return -1;
 352
 353         p2p->pending_listen_freq = freq;
 354
 355         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 356                 p2p_dbg(p2p, "Failed to start listen mode");
 357                 p2p->pending_listen_freq = 0;
 358                 wpabuf_free(ies);
 359                 return -1;
 360         }
 361         wpabuf_free(ies);
 362
 363         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 364
 365         return 0;
 366 }
 367
 368
 369 static void p2p_device_clear_reported(struct p2p_data *p2p)
 370 {
 371         struct p2p_device *dev;
 372         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 373                 dev->flags &= ~P2P_DEV_REPORTED;
 374                 dev->sd_reqs = 0;
 375         }
 376 }
 377
 378
 379 /**
 380  * p2p_get_device - Fetch a peer entry
 381  * @p2p: P2P module context from p2p_init()
 382  * @addr: P2P Device Address of the peer
 383  * Returns: Pointer to the device entry or %NULL if not found
 384  */
 385 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 386 {
 387         struct p2p_device *dev;
 388         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 389                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 390                         return dev;
 391         }
 392         return NULL;
 393 }
 394
 395
 396 /**
 397  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 398  * @p2p: P2P module context from p2p_init()
 399  * @addr: P2P Interface Address of the peer
 400  * Returns: Pointer to the device entry or %NULL if not found
 401  */
 402 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 403                                              const u8 *addr)
 404 {
 405         struct p2p_device *dev;
 406         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 407                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 408                         return dev;
 409         }
 410         return NULL;
 411 }
 412
 413
 414 /**
 415  * p2p_create_device - Create a peer entry
 416  * @p2p: P2P module context from p2p_init()
 417  * @addr: P2P Device Address of the peer
 418  * Returns: Pointer to the device entry or %NULL on failure
 419  *
 420  * If there is already an entry for the peer, it will be returned instead of
 421  * creating a new one.
 422  */
 423 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 424                                              const u8 *addr)
 425 {
 426         struct p2p_device *dev, *oldest = NULL;
 427         size_t count = 0;
 428
 429         dev = p2p_get_device(p2p, addr);
 430         if (dev)
 431                 return dev;
 432
 433         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 434                 count++;
 435                 if (oldest == NULL ||
 436                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 437                         oldest = dev;
 438         }
 439         if (count + 1 > p2p->cfg->max_peers && oldest) {
 440                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 441                 dl_list_del(&oldest->list);
 442                 p2p_device_free(p2p, oldest);
 443         }
 444
 445         dev = os_zalloc(sizeof(*dev));
 446         if (dev == NULL)
 447                 return NULL;
 448         dl_list_add(&p2p->devices, &dev->list);
 449         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 450
 451         return dev;
 452 }
 453
 454
 455 static void p2p_copy_client_info(struct p2p_device *dev,
 456                                  struct p2p_client_info *cli)
 457 {
 458         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 459         dev->info.device_name[cli->dev_name_len] = '\0';
 460         dev->info.dev_capab = cli->dev_capab;
 461         dev->info.config_methods = cli->config_methods;
 462         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 463         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 464         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 465                   dev->info.wps_sec_dev_type_list_len);
 466 }
 467
 468
 469 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 470                                  const u8 *go_interface_addr, int freq,
 471                                  const u8 *gi, size_t gi_len)
 472 {
 473         struct p2p_group_info info;
 474         size_t c;
 475         struct p2p_device *dev;
 476
 477         if (gi == NULL)
 478                 return 0;
 479
 480         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 481                 return -1;
 482
 483         /*
 484          * Clear old data for this group; if the devices are still in the
 485          * group, the information will be restored in the loop following this.
 486          */
 487         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 488                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 489                               ETH_ALEN) == 0) {
 490                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 491                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 492                 }
 493         }
 494
 495         for (c = 0; c < info.num_clients; c++) {
 496                 struct p2p_client_info *cli = &info.client[c];
 497                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 498                               ETH_ALEN) == 0)
 499                         continue; /* ignore our own entry */
 500                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 501                 if (dev) {
 502                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 503                                           P2P_DEV_PROBE_REQ_ONLY)) {
 504                                 /*
 505                                  * Update information since we have not
 506                                  * received this directly from the client.
 507                                  */
 508                                 p2p_copy_client_info(dev, cli);
 509                         } else {
 510                                 /*
 511                                  * Need to update P2P Client Discoverability
 512                                  * flag since it is valid only in P2P Group
 513                                  * Info attribute.
 514                                  */
 515                                 dev->info.dev_capab &=
 516                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 517                                 dev->info.dev_capab |=
 518                                         cli->dev_capab &
 519                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 520                         }
 521                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 522                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 523                         }
 524                 } else {
 525                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 526                         if (dev == NULL)
 527                                 continue;
 528                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 529                         p2p_copy_client_info(dev, cli);
 530                         dev->oper_freq = freq;
 531                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 532                                             dev->info.p2p_device_addr,
 533                                             &dev->info, 1);
 534                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 535                 }
 536
 537                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 538                           ETH_ALEN);
 539                 os_get_reltime(&dev->last_seen);
 540                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 541                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 542                           ETH_ALEN);
 543         }
 544
 545         return 0;
 546 }
 547
 548
 549 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 550                               int probe_req, const struct p2p_message *msg)
 551 {
 552         os_memcpy(dev->info.device_name, msg->device_name,
 553                   sizeof(dev->info.device_name));
 554
 555         if (msg->manufacturer &&
 556             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 557                 os_memset(dev->info.manufacturer, 0,
 558                           sizeof(dev->info.manufacturer));
 559                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 560                           msg->manufacturer_len);
 561         }
 562
 563         if (msg->model_name &&
 564             msg->model_name_len < sizeof(dev->info.model_name)) {
 565                 os_memset(dev->info.model_name, 0,
 566                           sizeof(dev->info.model_name));
 567                 os_memcpy(dev->info.model_name, msg->model_name,
 568                           msg->model_name_len);
 569         }
 570
 571         if (msg->model_number &&
 572             msg->model_number_len < sizeof(dev->info.model_number)) {
 573                 os_memset(dev->info.model_number, 0,
 574                           sizeof(dev->info.model_number));
 575                 os_memcpy(dev->info.model_number, msg->model_number,
 576                           msg->model_number_len);
 577         }
 578
 579         if (msg->serial_number &&
 580             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 581                 os_memset(dev->info.serial_number, 0,
 582                           sizeof(dev->info.serial_number));
 583                 os_memcpy(dev->info.serial_number, msg->serial_number,
 584                           msg->serial_number_len);
 585         }
 586
 587         if (msg->pri_dev_type)
 588                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 589                           sizeof(dev->info.pri_dev_type));
 590         else if (msg->wps_pri_dev_type)
 591                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 592                           sizeof(dev->info.pri_dev_type));
 593
 594         if (msg->wps_sec_dev_type_list) {
 595                 os_memcpy(dev->info.wps_sec_dev_type_list,
 596                           msg->wps_sec_dev_type_list,
 597                           msg->wps_sec_dev_type_list_len);
 598                 dev->info.wps_sec_dev_type_list_len =
 599                         msg->wps_sec_dev_type_list_len;
 600         }
 601
 602         if (msg->capability) {
 603                 /*
 604                  * P2P Client Discoverability bit is reserved in all frames
 605                  * that use this function, so do not change its value here.
 606                  */
 607                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 608                 dev->info.dev_capab |= msg->capability[0] &
 609                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 610                 dev->info.group_capab = msg->capability[1];
 611         }
 612
 613         if (msg->ext_listen_timing) {
 614                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 615                 dev->ext_listen_interval =
 616                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 617         }
 618
 619         if (!probe_req) {
 620                 u16 new_config_methods;
 621                 new_config_methods = msg->config_methods ?
 622                         msg->config_methods : msg->wps_config_methods;
 623                 if (new_config_methods &&
 624                     dev->info.config_methods != new_config_methods) {
 625                         p2p_dbg(p2p, "Update peer " MACSTR
 626                                 " config_methods 0x%x -> 0x%x",
 627                                 MAC2STR(dev->info.p2p_device_addr),
 628                                 dev->info.config_methods,
 629                                 new_config_methods);
 630                         dev->info.config_methods = new_config_methods;
 631                 }
 632         }
 633 }
 634
 635
 636 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 637                                          size_t ies_len)
 638 {
 639         const u8 *pos, *end;
 640         u8 id, len;
 641
 642         wpabuf_free(dev->info.vendor_elems);
 643         dev->info.vendor_elems = NULL;
 644
 645         end = ies + ies_len;
 646
 647         for (pos = ies; pos + 1 < end; pos += len) {
 648                 id = *pos++;
 649                 len = *pos++;
 650
 651                 if (pos + len > end)
 652                         break;
 653
 654                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 655                         continue;
 656
 657                 if (len >= 4) {
 658                         u32 type = WPA_GET_BE32(pos);
 659
 660                         if (type == WPA_IE_VENDOR_TYPE ||
 661                             type == WMM_IE_VENDOR_TYPE ||
 662                             type == WPS_IE_VENDOR_TYPE ||
 663                             type == P2P_IE_VENDOR_TYPE ||
 664                             type == WFD_IE_VENDOR_TYPE)
 665                                 continue;
 666                 }
 667
 668                 /* Unknown vendor element - make raw IE data available */
 669                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 670                         break;
 671                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 672         }
 673 }
 674
 675
 676 static int p2p_compare_wfd_info(struct p2p_device *dev,
 677                               const struct p2p_message *msg)
 678 {
 679         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 680                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 681                         return 1;
 682
 683                 return os_memcmp(dev->info.wfd_subelems->buf,
 684                                  msg->wfd_subelems->buf,
 685                                  dev->info.wfd_subelems->used);
 686         }
 687         if (dev->info.wfd_subelems || msg->wfd_subelems)
 688                 return 1;
 689
 690         return 0;
 691 }
 692
 693
 694 /**
 695  * p2p_add_device - Add peer entries based on scan results or P2P frames
 696  * @p2p: P2P module context from p2p_init()
 697  * @addr: Source address of Beacon or Probe Response frame (may be either
 698  *      P2P Device Address or P2P Interface Address)
 699  * @level: Signal level (signal strength of the received frame from the peer)
 700  * @freq: Frequency on which the Beacon or Probe Response frame was received
 701  * @rx_time: Time when the result was received
 702  * @ies: IEs from the Beacon or Probe Response frame
 703  * @ies_len: Length of ies buffer in octets
 704  * @scan_res: Whether this was based on scan results
 705  * Returns: 0 on success, -1 on failure
 706  *
 707  * If the scan result is for a GO, the clients in the group will also be added
 708  * to the peer table. This function can also be used with some other frames
 709  * like Provision Discovery Request that contains P2P Capability and P2P Device
 710  * Info attributes.
 711  */
 712 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 713                    struct os_reltime *rx_time, int level, const u8 *ies,
 714                    size_t ies_len, int scan_res)
 715 {
 716         struct p2p_device *dev;
 717         struct p2p_message msg;
 718         const u8 *p2p_dev_addr;
 719         int wfd_changed;
 720         int i;
 721         struct os_reltime time_now;
 722
 723         os_memset(&msg, 0, sizeof(msg));
 724         if (p2p_parse_ies(ies, ies_len, &msg)) {
 725                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 726                 p2p_parse_free(&msg);
 727                 return -1;
 728         }
 729
 730         if (msg.p2p_device_addr)
 731                 p2p_dev_addr = msg.p2p_device_addr;
 732         else if (msg.device_id)
 733                 p2p_dev_addr = msg.device_id;
 734         else {
 735                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 736                 p2p_parse_free(&msg);
 737                 return -1;
 738         }
 739
 740         if (!is_zero_ether_addr(p2p->peer_filter) &&
 741             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 742                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 743                         " due to peer filter", MAC2STR(p2p_dev_addr));
 744                 p2p_parse_free(&msg);
 745                 return 0;
 746         }
 747
 748         dev = p2p_create_device(p2p, p2p_dev_addr);
 749         if (dev == NULL) {
 750                 p2p_parse_free(&msg);
 751                 return -1;
 752         }
 753
 754         if (rx_time == NULL) {
 755                 os_get_reltime(&time_now);
 756                 rx_time = &time_now;
 757         }
 758
 759         /*
 760          * Update the device entry only if the new peer
 761          * entry is newer than the one previously stored.
 762          */
 763         if (dev->last_seen.sec > 0 &&
 764             os_reltime_before(rx_time, &dev->last_seen)) {
 765                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 766                         (unsigned int) rx_time->sec,
 767                         (unsigned int) rx_time->usec,
 768                         (unsigned int) dev->last_seen.sec,
 769                         (unsigned int) dev->last_seen.usec);
 770                 p2p_parse_free(&msg);
 771                 return -1;
 772         }
 773
 774         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 775
 776         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 777
 778         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 779                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 780         if (msg.ssid &&
 781             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 782              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 783              != 0)) {
 784                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 785                 dev->oper_ssid_len = msg.ssid[1];
 786         }
 787
 788         if (msg.adv_service_instance && msg.adv_service_instance_len) {
 789                 wpabuf_free(dev->info.p2ps_instance);
 790                 dev->info.p2ps_instance = wpabuf_alloc_copy(
 791                         msg.adv_service_instance, msg.adv_service_instance_len);
 792         }
 793
 794         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 795             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 796                 int ds_freq;
 797                 if (*msg.ds_params == 14)
 798                         ds_freq = 2484;
 799                 else
 800                         ds_freq = 2407 + *msg.ds_params * 5;
 801                 if (freq != ds_freq) {
 802                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 803                                 freq, ds_freq);
 804                         freq = ds_freq;
 805                 }
 806         }
 807
 808         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 809                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 810                         MACSTR " %d -> %d MHz (DS param %d)",
 811                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 812                         freq, msg.ds_params ? *msg.ds_params : -1);
 813         }
 814         if (scan_res) {
 815                 dev->listen_freq = freq;
 816                 if (msg.group_info)
 817                         dev->oper_freq = freq;
 818         }
 819         dev->info.level = level;
 820
 821         p2p_copy_wps_info(p2p, dev, 0, &msg);
 822
 823         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 824                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 825                 dev->info.wps_vendor_ext[i] = NULL;
 826         }
 827
 828         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 829                 if (msg.wps_vendor_ext[i] == NULL)
 830                         break;
 831                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 832                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 833                 if (dev->info.wps_vendor_ext[i] == NULL)
 834                         break;
 835         }
 836
 837         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 838
 839         if (msg.wfd_subelems) {
 840                 wpabuf_free(dev->info.wfd_subelems);
 841                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 842         }
 843
 844         if (scan_res) {
 845                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 846                                       msg.group_info, msg.group_info_len);
 847         }
 848
 849         p2p_parse_free(&msg);
 850
 851         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 852
 853         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
 854             (!msg.adv_service_instance ||
 855              (dev->flags & P2P_DEV_P2PS_REPORTED)))
 856                 return 0;
 857
 858         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 859                 freq, (unsigned int) rx_time->sec,
 860                 (unsigned int) rx_time->usec);
 861         if (dev->flags & P2P_DEV_USER_REJECTED) {
 862                 p2p_dbg(p2p, "Do not report rejected device");
 863                 return 0;
 864         }
 865
 866         if (dev->info.config_methods == 0 &&
 867             (freq == 2412 || freq == 2437 || freq == 2462)) {
 868                 /*
 869                  * If we have only seen a Beacon frame from a GO, we do not yet
 870                  * know what WPS config methods it supports. Since some
 871                  * applications use config_methods value from P2P-DEVICE-FOUND
 872                  * events, postpone reporting this peer until we've fully
 873                  * discovered its capabilities.
 874                  *
 875                  * At least for now, do this only if the peer was detected on
 876                  * one of the social channels since that peer can be easily be
 877                  * found again and there are no limitations of having to use
 878                  * passive scan on this channels, so this can be done through
 879                  * Probe Response frame that includes the config_methods
 880                  * information.
 881                  */
 882                 p2p_dbg(p2p, "Do not report peer " MACSTR
 883                         " with unknown config methods", MAC2STR(addr));
 884                 return 0;
 885         }
 886
 887         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 888                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 889         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 890
 891         if (msg.adv_service_instance)
 892                 dev->flags |= P2P_DEV_P2PS_REPORTED;
 893
 894         return 0;
 895 }
 896
 897
 898 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 899 {
 900         int i;
 901
 902         if (p2p->go_neg_peer == dev) {
 903                 /*
 904                  * If GO Negotiation is in progress, report that it has failed.
 905                  */
 906                 p2p_go_neg_failed(p2p, -1);
 907         }
 908         if (p2p->invite_peer == dev)
 909                 p2p->invite_peer = NULL;
 910         if (p2p->sd_peer == dev)
 911                 p2p->sd_peer = NULL;
 912         if (p2p->pending_client_disc_go == dev)
 913                 p2p->pending_client_disc_go = NULL;
 914
 915         /* dev_lost() device, but only if it was previously dev_found() */
 916         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 917                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 918                                    dev->info.p2p_device_addr);
 919
 920         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 921                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 922                 dev->info.wps_vendor_ext[i] = NULL;
 923         }
 924
 925         wpabuf_free(dev->info.wfd_subelems);
 926         wpabuf_free(dev->info.vendor_elems);
 927         wpabuf_free(dev->go_neg_conf);
 928         wpabuf_free(dev->info.p2ps_instance);
 929
 930         os_free(dev);
 931 }
 932
 933
 934 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 935 {
 936         struct p2p_channels *c;
 937         struct p2p_reg_class *cla;
 938         size_t cl, ch;
 939         int found = 0;
 940         u8 reg_class;
 941         u8 channel;
 942         int freq;
 943
 944         c = &p2p->cfg->channels;
 945         for (cl = 0; cl < c->reg_classes; cl++) {
 946                 cla = &c->reg_class[cl];
 947                 if (cla->reg_class != p2p->last_prog_scan_class)
 948                         continue;
 949                 for (ch = 0; ch < cla->channels; ch++) {
 950                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 951                                 found = 1;
 952                                 break;
 953                         }
 954                 }
 955                 if (found)
 956                         break;
 957         }
 958
 959         if (!found) {
 960                 /* Start from beginning */
 961                 reg_class = c->reg_class[0].reg_class;
 962                 channel = c->reg_class[0].channel[0];
 963         } else {
 964                 /* Pick the next channel */
 965                 ch++;
 966                 if (ch == cla->channels) {
 967                         cl++;
 968                         if (cl == c->reg_classes)
 969                                 cl = 0;
 970                         ch = 0;
 971                 }
 972                 reg_class = c->reg_class[cl].reg_class;
 973                 channel = c->reg_class[cl].channel[ch];
 974         }
 975
 976         freq = p2p_channel_to_freq(reg_class, channel);
 977         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 978                 reg_class, channel, freq);
 979         p2p->last_prog_scan_class = reg_class;
 980         p2p->last_prog_scan_chan = channel;
 981
 982         if (freq == 2412 || freq == 2437 || freq == 2462)
 983                 return 0; /* No need to add social channels */
 984         return freq;
 985 }
 986
 987
 988 static void p2p_search(struct p2p_data *p2p)
 989 {
 990         int freq = 0;
 991         enum p2p_scan_type type;
 992         u16 pw_id = DEV_PW_DEFAULT;
 993         int res;
 994
 995         if (p2p->drv_in_listen) {
 996                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 997                 return;
 998         }
 999         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1000
1001         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
1002             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
1003                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1004                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1005         } else {
1006                 type = P2P_SCAN_SOCIAL;
1007                 p2p_dbg(p2p, "Starting search");
1008         }
1009
1010         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1011                                  p2p->num_req_dev_types, p2p->req_dev_types,
1012                                  p2p->find_dev_id, pw_id);
1013         if (res < 0) {
1014                 p2p_dbg(p2p, "Scan request schedule failed");
1015                 p2p_continue_find(p2p);
1016         }
1017 }
1018
1019
1020 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1021 {
1022         struct p2p_data *p2p = eloop_ctx;
1023         p2p_dbg(p2p, "Find timeout -> stop");
1024         p2p_stop_find(p2p);
1025 }
1026
1027
1028 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1029 {
1030         if (status != 0) {
1031                 p2p_dbg(p2p, "Scan request failed");
1032                 /* Do continue find even for the first p2p_find_scan */
1033                 p2p_continue_find(p2p);
1034         } else {
1035                 p2p_dbg(p2p, "Running p2p_scan");
1036                 p2p->p2p_scan_running = 1;
1037                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1038                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1039                                        p2p, NULL);
1040         }
1041 }
1042
1043
1044 static int p2p_run_after_scan(struct p2p_data *p2p)
1045 {
1046         struct p2p_device *dev;
1047         enum p2p_after_scan op;
1048
1049         if (p2p->after_scan_tx) {
1050                 p2p->after_scan_tx_in_progress = 1;
1051                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1052                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1053                                       p2p->after_scan_tx->freq,
1054                                       p2p->after_scan_tx->dst,
1055                                       p2p->after_scan_tx->src,
1056                                       p2p->after_scan_tx->bssid,
1057                                       (u8 *) (p2p->after_scan_tx + 1),
1058                                       p2p->after_scan_tx->len,
1059                                       p2p->after_scan_tx->wait_time);
1060                 os_free(p2p->after_scan_tx);
1061                 p2p->after_scan_tx = NULL;
1062                 return 1;
1063         }
1064
1065         op = p2p->start_after_scan;
1066         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1067         switch (op) {
1068         case P2P_AFTER_SCAN_NOTHING:
1069                 break;
1070         case P2P_AFTER_SCAN_LISTEN:
1071                 p2p_dbg(p2p, "Start previously requested Listen state");
1072                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1073                            p2p->pending_listen_usec / 1000);
1074                 return 1;
1075         case P2P_AFTER_SCAN_CONNECT:
1076                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1077                         MAC2STR(p2p->after_scan_peer));
1078                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1079                 if (dev == NULL) {
1080                         p2p_dbg(p2p, "Peer not known anymore");
1081                         break;
1082                 }
1083                 p2p_connect_send(p2p, dev);
1084                 return 1;
1085         }
1086
1087         return 0;
1088 }
1089
1090
1091 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1092 {
1093         struct p2p_data *p2p = eloop_ctx;
1094         int running;
1095         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1096         running = p2p->p2p_scan_running;
1097         /* Make sure we recover from missed scan results callback */
1098         p2p->p2p_scan_running = 0;
1099
1100         if (running)
1101                 p2p_run_after_scan(p2p);
1102 }
1103
1104
1105 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1106 {
1107         p2p->num_req_dev_types = 0;
1108         os_free(p2p->req_dev_types);
1109         p2p->req_dev_types = NULL;
1110 }
1111
1112
1113 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1114 {
1115         u8 buf[SHA256_MAC_LEN];
1116         char str_buf[256];
1117         const u8 *adv_array;
1118         size_t i, adv_len;
1119
1120         if (!str || !hash)
1121                 return 0;
1122
1123         if (!str[0]) {
1124                 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1125                 return 1;
1126         }
1127
1128         adv_array = (u8 *) str_buf;
1129         adv_len = os_strlen(str);
1130
1131         for (i = 0; str[i] && i < adv_len; i++) {
1132                 if (str[i] >= 'A' && str[i] <= 'Z')
1133                         str_buf[i] = str[i] - 'A' + 'a';
1134                 else
1135                         str_buf[i] = str[i];
1136         }
1137
1138         if (sha256_vector(1, &adv_array, &adv_len, buf))
1139                 return 0;
1140
1141         os_memcpy(hash, buf, P2PS_HASH_LEN);
1142         return 1;
1143 }
1144
1145
1146 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1147              enum p2p_discovery_type type,
1148              unsigned int num_req_dev_types, const u8 *req_dev_types,
1149              const u8 *dev_id, unsigned int search_delay,
1150              u8 seek_count, const char **seek)
1151 {
1152         int res;
1153
1154         p2p_dbg(p2p, "Starting find (type=%d)", type);
1155         os_get_reltime(&p2p->find_start);
1156         if (p2p->p2p_scan_running) {
1157                 p2p_dbg(p2p, "p2p_scan is already running");
1158         }
1159
1160         p2p_free_req_dev_types(p2p);
1161         if (req_dev_types && num_req_dev_types) {
1162                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1163                                                WPS_DEV_TYPE_LEN);
1164                 if (p2p->req_dev_types == NULL)
1165                         return -1;
1166                 os_memcpy(p2p->req_dev_types, req_dev_types,
1167                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1168                 p2p->num_req_dev_types = num_req_dev_types;
1169         }
1170
1171         if (dev_id) {
1172                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1173                 p2p->find_dev_id = p2p->find_dev_id_buf;
1174         } else
1175                 p2p->find_dev_id = NULL;
1176
1177         if (seek_count == 0 || !seek) {
1178                 /* Not an ASP search */
1179                 p2p->p2ps_seek = 0;
1180         } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1181                 /*
1182                  * An empty seek string means no hash values, but still an ASP
1183                  * search.
1184                  */
1185                 p2p->p2ps_seek_count = 0;
1186                 p2p->p2ps_seek = 1;
1187         } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1188                 u8 buf[P2PS_HASH_LEN];
1189                 int i;
1190
1191                 p2p->p2ps_seek_count = seek_count;
1192                 for (i = 0; i < seek_count; i++) {
1193                         if (!p2ps_gen_hash(p2p, seek[i], buf))
1194                                 continue;
1195
1196                         /* If asking for wildcard, don't do others */
1197                         if (os_memcmp(buf, p2p->wild_card_hash,
1198                                       P2PS_HASH_LEN) == 0) {
1199                                 p2p->p2ps_seek_count = 0;
1200                                 break;
1201                         }
1202
1203                         os_memcpy(&p2p->query_hash[i * P2PS_HASH_LEN], buf,
1204                                   P2PS_HASH_LEN);
1205                 }
1206                 p2p->p2ps_seek = 1;
1207         } else {
1208                 p2p->p2ps_seek_count = 0;
1209                 p2p->p2ps_seek = 1;
1210         }
1211
1212         /* Special case to perform wildcard search */
1213         if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1214                 p2p->p2ps_seek_count = 1;
1215                 os_memcpy(&p2p->query_hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1216         }
1217
1218         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1219         p2p_clear_timeout(p2p);
1220         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1221         p2p->find_type = type;
1222         p2p_device_clear_reported(p2p);
1223         p2p_set_state(p2p, P2P_SEARCH);
1224         p2p->search_delay = search_delay;
1225         p2p->in_search_delay = 0;
1226         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1227         p2p->last_p2p_find_timeout = timeout;
1228         if (timeout)
1229                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1230                                        p2p, NULL);
1231         switch (type) {
1232         case P2P_FIND_START_WITH_FULL:
1233         case P2P_FIND_PROGRESSIVE:
1234                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1235                                          p2p->num_req_dev_types,
1236                                          p2p->req_dev_types, dev_id,
1237                                          DEV_PW_DEFAULT);
1238                 break;
1239         case P2P_FIND_ONLY_SOCIAL:
1240                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1241                                          p2p->num_req_dev_types,
1242                                          p2p->req_dev_types, dev_id,
1243                                          DEV_PW_DEFAULT);
1244                 break;
1245         default:
1246                 return -1;
1247         }
1248
1249         if (res != 0 && p2p->p2p_scan_running) {
1250                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1251                 /* wait for the previous p2p_scan to complete */
1252                 res = 0; /* do not report failure */
1253         } else if (res != 0) {
1254                 p2p_dbg(p2p, "Failed to start p2p_scan");
1255                 p2p_set_state(p2p, P2P_IDLE);
1256                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1257         }
1258
1259         return res;
1260 }
1261
1262
1263 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1264 {
1265         p2p_dbg(p2p, "Stopping find");
1266         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1267         p2p_clear_timeout(p2p);
1268         if (p2p->state == P2P_SEARCH)
1269                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1270
1271         p2p->p2ps_seek_count = 0;
1272
1273         p2p_set_state(p2p, P2P_IDLE);
1274         p2p_free_req_dev_types(p2p);
1275         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1276         if (p2p->go_neg_peer)
1277                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1278         p2p->go_neg_peer = NULL;
1279         p2p->sd_peer = NULL;
1280         p2p->invite_peer = NULL;
1281         p2p_stop_listen_for_freq(p2p, freq);
1282 }
1283
1284
1285 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1286 {
1287         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1288                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1289                 return;
1290         }
1291         if (p2p->in_listen) {
1292                 p2p->in_listen = 0;
1293                 p2p_clear_timeout(p2p);
1294         }
1295         if (p2p->drv_in_listen) {
1296                 /*
1297                  * The driver may not deliver callback to p2p_listen_end()
1298                  * when the operation gets canceled, so clear the internal
1299                  * variable that is tracking driver state.
1300                  */
1301                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1302                 p2p->drv_in_listen = 0;
1303         }
1304         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1305 }
1306
1307
1308 void p2p_stop_listen(struct p2p_data *p2p)
1309 {
1310         if (p2p->state != P2P_LISTEN_ONLY) {
1311                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1312                 return;
1313         }
1314
1315         p2p_stop_listen_for_freq(p2p, 0);
1316         p2p_set_state(p2p, P2P_IDLE);
1317 }
1318
1319
1320 void p2p_stop_find(struct p2p_data *p2p)
1321 {
1322         p2p->pending_listen_freq = 0;
1323         p2p_stop_find_for_freq(p2p, 0);
1324 }
1325
1326
1327 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1328                                     unsigned int force_freq,
1329                                     unsigned int pref_freq, int go)
1330 {
1331         u8 op_class, op_channel;
1332         unsigned int freq = force_freq ? force_freq : pref_freq;
1333
1334         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1335                 force_freq, pref_freq, go);
1336         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1337                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1338                 return -1;
1339         }
1340
1341         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1342             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1343                                           op_channel))) {
1344                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1345                         freq, op_class, op_channel);
1346                 return -1;
1347         }
1348
1349         p2p->op_reg_class = op_class;
1350         p2p->op_channel = op_channel;
1351
1352         if (force_freq) {
1353                 p2p->channels.reg_classes = 1;
1354                 p2p->channels.reg_class[0].channels = 1;
1355                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1356                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1357         } else {
1358                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1359                           sizeof(struct p2p_channels));
1360         }
1361
1362         return 0;
1363 }
1364
1365
1366 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1367 {
1368         u8 op_class, op_channel;
1369         const int op_classes_5ghz[] = { 124, 115, 0 };
1370         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1371         const int op_classes_vht[] = { 128, 0 };
1372
1373         p2p_dbg(p2p, "Prepare channel best");
1374
1375         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1376             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1377             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1378             == 0) {
1379                 p2p_dbg(p2p, "Select best overall 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_5 > 0 &&
1383                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1384                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1385                    == 0) {
1386                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1387                 p2p->op_reg_class = op_class;
1388                 p2p->op_channel = op_channel;
1389         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1390                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1391                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1392                                        &op_channel) == 0) {
1393                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1394                 p2p->op_reg_class = op_class;
1395                 p2p->op_channel = op_channel;
1396         } else if (p2p->cfg->num_pref_chan > 0 &&
1397                    p2p_channels_includes(&p2p->cfg->channels,
1398                                          p2p->cfg->pref_chan[0].op_class,
1399                                          p2p->cfg->pref_chan[0].chan)) {
1400                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1401                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1402                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1403         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1404                                       &p2p->op_reg_class, &p2p->op_channel) ==
1405                    0) {
1406                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1407                         p2p->op_reg_class, p2p->op_channel);
1408         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1409                                       &p2p->op_reg_class, &p2p->op_channel) ==
1410                    0) {
1411                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1412                         p2p->op_reg_class, p2p->op_channel);
1413         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1414                                       &p2p->op_reg_class, &p2p->op_channel) ==
1415                    0) {
1416                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1417                         p2p->op_reg_class, p2p->op_channel);
1418         } else if (p2p_channels_includes(&p2p->cfg->channels,
1419                                          p2p->cfg->op_reg_class,
1420                                          p2p->cfg->op_channel)) {
1421                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1422                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1423                 p2p->op_channel = p2p->cfg->op_channel;
1424         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1425                                              &p2p->op_reg_class,
1426                                              &p2p->op_channel) == 0) {
1427                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1428                         p2p->op_reg_class, p2p->op_channel);
1429         } else {
1430                 /* Select any random available channel from the first available
1431                  * operating class */
1432                 p2p_channel_select(&p2p->cfg->channels, NULL,
1433                                    &p2p->op_reg_class,
1434                                    &p2p->op_channel);
1435                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1436                         p2p->op_channel, p2p->op_reg_class);
1437         }
1438
1439         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1440                   sizeof(struct p2p_channels));
1441 }
1442
1443
1444 /**
1445  * p2p_prepare_channel - Select operating channel for GO Negotiation
1446  * @p2p: P2P module context from p2p_init()
1447  * @dev: Selected peer device
1448  * @force_freq: Forced frequency in MHz or 0 if not forced
1449  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1450  * @go: Whether the local end will be forced to be GO
1451  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1452  *
1453  * This function is used to do initial operating channel selection for GO
1454  * Negotiation prior to having received peer information. The selected channel
1455  * may be further optimized in p2p_reselect_channel() once the peer information
1456  * is available.
1457  */
1458 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1459                         unsigned int force_freq, unsigned int pref_freq, int go)
1460 {
1461         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1462                 force_freq, pref_freq, go);
1463         if (force_freq || pref_freq) {
1464                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1465                     0)
1466                         return -1;
1467         } else {
1468                 p2p_prepare_channel_best(p2p);
1469         }
1470         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1471         if (go)
1472                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1473         else if (!force_freq)
1474                 p2p_channels_union_inplace(&p2p->channels,
1475                                            &p2p->cfg->cli_channels);
1476         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1477
1478         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1479                 p2p->op_reg_class, p2p->op_channel,
1480                 force_freq ? " (forced)" : "");
1481
1482         if (force_freq)
1483                 dev->flags |= P2P_DEV_FORCE_FREQ;
1484         else
1485                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1486
1487         return 0;
1488 }
1489
1490
1491 static void p2p_set_dev_persistent(struct p2p_device *dev,
1492                                    int persistent_group)
1493 {
1494         switch (persistent_group) {
1495         case 0:
1496                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1497                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1498                 break;
1499         case 1:
1500                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1501                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1502                 break;
1503         case 2:
1504                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1505                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1506                 break;
1507         }
1508 }
1509
1510
1511 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1512                 enum p2p_wps_method wps_method,
1513                 int go_intent, const u8 *own_interface_addr,
1514                 unsigned int force_freq, int persistent_group,
1515                 const u8 *force_ssid, size_t force_ssid_len,
1516                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1517 {
1518         struct p2p_device *dev;
1519
1520         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1521                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1522                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1523                 "oob_pw_id=%u",
1524                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1525                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1526
1527         dev = p2p_get_device(p2p, peer_addr);
1528         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1529                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1530                         MAC2STR(peer_addr));
1531                 return -1;
1532         }
1533
1534         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1535                                 go_intent == 15) < 0)
1536                 return -1;
1537
1538         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1539                 if (!(dev->info.dev_capab &
1540                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1541                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1542                                 " that is in a group and is not discoverable",
1543                                 MAC2STR(peer_addr));
1544                         return -1;
1545                 }
1546                 if (dev->oper_freq <= 0) {
1547                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1548                                 " with incomplete information",
1549                                 MAC2STR(peer_addr));
1550                         return -1;
1551                 }
1552
1553                 /*
1554                  * First, try to connect directly. If the peer does not
1555                  * acknowledge frames, assume it is sleeping and use device
1556                  * discoverability via the GO at that point.
1557                  */
1558         }
1559
1560         p2p->ssid_set = 0;
1561         if (force_ssid) {
1562                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1563                                   force_ssid, force_ssid_len);
1564                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1565                 p2p->ssid_len = force_ssid_len;
1566                 p2p->ssid_set = 1;
1567         }
1568
1569         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1570         dev->flags &= ~P2P_DEV_USER_REJECTED;
1571         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1572         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1573         if (pd_before_go_neg)
1574                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1575         else {
1576                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1577                 /*
1578                  * Assign dialog token and tie breaker here to use the same
1579                  * values in each retry within the same GO Negotiation exchange.
1580                  */
1581                 dev->dialog_token++;
1582                 if (dev->dialog_token == 0)
1583                         dev->dialog_token = 1;
1584                 dev->tie_breaker = p2p->next_tie_breaker;
1585                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1586         }
1587         dev->connect_reqs = 0;
1588         dev->go_neg_req_sent = 0;
1589         dev->go_state = UNKNOWN_GO;
1590         p2p_set_dev_persistent(dev, persistent_group);
1591         p2p->go_intent = go_intent;
1592         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1593
1594         if (p2p->state != P2P_IDLE)
1595                 p2p_stop_find(p2p);
1596
1597         if (p2p->after_scan_tx) {
1598                 /*
1599                  * We need to drop the pending frame to avoid issues with the
1600                  * new GO Negotiation, e.g., when the pending frame was from a
1601                  * previous attempt at starting a GO Negotiation.
1602                  */
1603                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1604                 os_free(p2p->after_scan_tx);
1605                 p2p->after_scan_tx = NULL;
1606         }
1607
1608         dev->wps_method = wps_method;
1609         dev->oob_pw_id = oob_pw_id;
1610         dev->status = P2P_SC_SUCCESS;
1611
1612         if (p2p->p2p_scan_running) {
1613                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1614                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1615                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1616                 return 0;
1617         }
1618         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1619
1620         return p2p_connect_send(p2p, dev);
1621 }
1622
1623
1624 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1625                   enum p2p_wps_method wps_method,
1626                   int go_intent, const u8 *own_interface_addr,
1627                   unsigned int force_freq, int persistent_group,
1628                   const u8 *force_ssid, size_t force_ssid_len,
1629                   unsigned int pref_freq, u16 oob_pw_id)
1630 {
1631         struct p2p_device *dev;
1632
1633         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1634                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1635                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1636                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1637                 wps_method, persistent_group, oob_pw_id);
1638
1639         dev = p2p_get_device(p2p, peer_addr);
1640         if (dev == NULL) {
1641                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1642                         MAC2STR(peer_addr));
1643                 return -1;
1644         }
1645
1646         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1647                                 15) < 0)
1648                 return -1;
1649
1650         p2p->ssid_set = 0;
1651         if (force_ssid) {
1652                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1653                                   force_ssid, force_ssid_len);
1654                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1655                 p2p->ssid_len = force_ssid_len;
1656                 p2p->ssid_set = 1;
1657         }
1658
1659         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1660         dev->flags &= ~P2P_DEV_USER_REJECTED;
1661         dev->go_neg_req_sent = 0;
1662         dev->go_state = UNKNOWN_GO;
1663         p2p_set_dev_persistent(dev, persistent_group);
1664         p2p->go_intent = go_intent;
1665         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1666
1667         dev->wps_method = wps_method;
1668         dev->oob_pw_id = oob_pw_id;
1669         dev->status = P2P_SC_SUCCESS;
1670
1671         return 0;
1672 }
1673
1674
1675 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1676                       struct p2p_device *dev, struct p2p_message *msg)
1677 {
1678         os_get_reltime(&dev->last_seen);
1679
1680         p2p_copy_wps_info(p2p, dev, 0, msg);
1681
1682         if (msg->listen_channel) {
1683                 int freq;
1684                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1685                                            msg->listen_channel[4]);
1686                 if (freq < 0) {
1687                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1688                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1689                                 msg->listen_channel[0],
1690                                 msg->listen_channel[1],
1691                                 msg->listen_channel[2],
1692                                 msg->listen_channel[3],
1693                                 msg->listen_channel[4]);
1694                 } else {
1695                         p2p_dbg(p2p, "Update peer " MACSTR
1696                                 " Listen channel: %u -> %u MHz",
1697                                 MAC2STR(dev->info.p2p_device_addr),
1698                                 dev->listen_freq, freq);
1699                         dev->listen_freq = freq;
1700                 }
1701         }
1702
1703         if (msg->wfd_subelems) {
1704                 wpabuf_free(dev->info.wfd_subelems);
1705                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1706         }
1707
1708         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1709                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1710                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1711         } else {
1712                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1713                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1714                         "listen_freq=%d",
1715                         MAC2STR(dev->info.p2p_device_addr),
1716                         dev->info.dev_capab, dev->info.group_capab,
1717                         dev->info.device_name, dev->listen_freq);
1718         }
1719
1720         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1721
1722         if (dev->flags & P2P_DEV_USER_REJECTED) {
1723                 p2p_dbg(p2p, "Do not report rejected device");
1724                 return;
1725         }
1726
1727         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1728                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1729         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1730 }
1731
1732
1733 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1734 {
1735         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1736         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1737         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1738                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1739         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1740 }
1741
1742
1743 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1744 {
1745         if (p2p->ssid_set) {
1746                 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1747                 params->ssid_len = p2p->ssid_len;
1748         } else {
1749                 p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1750         }
1751         p2p->ssid_set = 0;
1752
1753         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1754         return 0;
1755 }
1756
1757
1758 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1759 {
1760         struct p2p_go_neg_results res;
1761         int go = peer->go_state == LOCAL_GO;
1762         struct p2p_channels intersection;
1763
1764         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1765                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1766
1767         os_memset(&res, 0, sizeof(res));
1768         res.role_go = go;
1769         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1770         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1771         res.wps_method = peer->wps_method;
1772         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1773                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1774                         res.persistent_group = 2;
1775                 else
1776                         res.persistent_group = 1;
1777         }
1778
1779         if (go) {
1780                 /* Setup AP mode for WPS provisioning */
1781                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1782                                                p2p->op_channel);
1783                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1784                 res.ssid_len = p2p->ssid_len;
1785                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1786         } else {
1787                 res.freq = peer->oper_freq;
1788                 if (p2p->ssid_len) {
1789                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1790                         res.ssid_len = p2p->ssid_len;
1791                 }
1792         }
1793
1794         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1795         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1796         p2p_channels_intersect(&p2p->channels, &peer->channels,
1797                                &intersection);
1798         if (go) {
1799                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1800                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1801                                   &intersection);
1802         }
1803
1804         p2p_channels_to_freqs(&intersection, res.freq_list,
1805                               P2P_MAX_CHANNELS);
1806
1807         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1808
1809         p2p_clear_timeout(p2p);
1810         p2p->ssid_set = 0;
1811         peer->go_neg_req_sent = 0;
1812         peer->wps_method = WPS_NOT_READY;
1813         peer->oob_pw_id = 0;
1814         wpabuf_free(peer->go_neg_conf);
1815         peer->go_neg_conf = NULL;
1816
1817         p2p_set_state(p2p, P2P_PROVISIONING);
1818         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1819 }
1820
1821
1822 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1823                               const u8 *data, size_t len, int rx_freq)
1824 {
1825         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1826         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1827
1828         if (len < 1)
1829                 return;
1830
1831         switch (data[0]) {
1832         case P2P_GO_NEG_REQ:
1833                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1834                 break;
1835         case P2P_GO_NEG_RESP:
1836                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1837                 break;
1838         case P2P_GO_NEG_CONF:
1839                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1840                 break;
1841         case P2P_INVITATION_REQ:
1842                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1843                                            rx_freq);
1844                 break;
1845         case P2P_INVITATION_RESP:
1846                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1847                 break;
1848         case P2P_PROV_DISC_REQ:
1849                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1850                 break;
1851         case P2P_PROV_DISC_RESP:
1852                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1853                 break;
1854         case P2P_DEV_DISC_REQ:
1855                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1856                 break;
1857         case P2P_DEV_DISC_RESP:
1858                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1859                 break;
1860         default:
1861                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1862                         data[0]);
1863                 break;
1864         }
1865 }
1866
1867
1868 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1869                                  const u8 *sa, const u8 *bssid, const u8 *data,
1870                                  size_t len, int freq)
1871 {
1872         if (len < 1)
1873                 return;
1874
1875         switch (data[0]) {
1876         case WLAN_PA_VENDOR_SPECIFIC:
1877                 data++;
1878                 len--;
1879                 if (len < 4)
1880                         return;
1881                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1882                         return;
1883
1884                 data += 4;
1885                 len -= 4;
1886
1887                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1888                 break;
1889         case WLAN_PA_GAS_INITIAL_REQ:
1890                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1891                 break;
1892         case WLAN_PA_GAS_INITIAL_RESP:
1893                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1894                 break;
1895         case WLAN_PA_GAS_COMEBACK_REQ:
1896                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1897                 break;
1898         case WLAN_PA_GAS_COMEBACK_RESP:
1899                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1900                 break;
1901         }
1902 }
1903
1904
1905 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1906                    const u8 *bssid, u8 category,
1907                    const u8 *data, size_t len, int freq)
1908 {
1909         if (category == WLAN_ACTION_PUBLIC) {
1910                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1911                 return;
1912         }
1913
1914         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1915                 return;
1916
1917         if (len < 4)
1918                 return;
1919
1920         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1921                 return;
1922         data += 4;
1923         len -= 4;
1924
1925         /* P2P action frame */
1926         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1927         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1928
1929         if (len < 1)
1930                 return;
1931         switch (data[0]) {
1932         case P2P_NOA:
1933                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1934                 /* TODO */
1935                 break;
1936         case P2P_PRESENCE_REQ:
1937                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1938                 break;
1939         case P2P_PRESENCE_RESP:
1940                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1941                 break;
1942         case P2P_GO_DISC_REQ:
1943                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1944                 break;
1945         default:
1946                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1947                 break;
1948         }
1949 }
1950
1951
1952 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1953 {
1954         struct p2p_data *p2p = eloop_ctx;
1955         if (p2p->go_neg_peer == NULL)
1956                 return;
1957         if (p2p->pending_listen_freq) {
1958                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1959                 p2p->pending_listen_freq = 0;
1960         }
1961         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1962         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1963         /*
1964          * Set new timeout to make sure a previously set one does not expire
1965          * too quickly while waiting for the GO Negotiation to complete.
1966          */
1967         p2p_set_timeout(p2p, 0, 500000);
1968         p2p_connect_send(p2p, p2p->go_neg_peer);
1969 }
1970
1971
1972 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1973 {
1974         struct p2p_data *p2p = eloop_ctx;
1975         if (p2p->invite_peer == NULL)
1976                 return;
1977         if (p2p->pending_listen_freq) {
1978                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1979                 p2p->pending_listen_freq = 0;
1980         }
1981         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1982         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1983                         p2p->invite_dev_pw_id);
1984 }
1985
1986
1987 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1988                                        const u8 *ie, size_t ie_len)
1989 {
1990         struct p2p_message msg;
1991         struct p2p_device *dev;
1992
1993         os_memset(&msg, 0, sizeof(msg));
1994         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1995         {
1996                 p2p_parse_free(&msg);
1997                 return; /* not a P2P probe */
1998         }
1999
2000         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2001             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2002             != 0) {
2003                 /* The Probe Request is not part of P2P Device Discovery. It is
2004                  * not known whether the source address of the frame is the P2P
2005                  * Device Address or P2P Interface Address. Do not add a new
2006                  * peer entry based on this frames.
2007                  */
2008                 p2p_parse_free(&msg);
2009                 return;
2010         }
2011
2012         dev = p2p_get_device(p2p, addr);
2013         if (dev) {
2014                 if (dev->country[0] == 0 && msg.listen_channel)
2015                         os_memcpy(dev->country, msg.listen_channel, 3);
2016                 os_get_reltime(&dev->last_seen);
2017                 p2p_parse_free(&msg);
2018                 return; /* already known */
2019         }
2020
2021         dev = p2p_create_device(p2p, addr);
2022         if (dev == NULL) {
2023                 p2p_parse_free(&msg);
2024                 return;
2025         }
2026
2027         os_get_reltime(&dev->last_seen);
2028         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2029
2030         if (msg.listen_channel) {
2031                 os_memcpy(dev->country, msg.listen_channel, 3);
2032                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2033                                                        msg.listen_channel[4]);
2034         }
2035
2036         p2p_copy_wps_info(p2p, dev, 1, &msg);
2037
2038         if (msg.wfd_subelems) {
2039                 wpabuf_free(dev->info.wfd_subelems);
2040                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2041         }
2042
2043         p2p_parse_free(&msg);
2044
2045         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2046                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2047                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2048                 dev->info.group_capab, dev->info.device_name,
2049                 dev->listen_freq);
2050 }
2051
2052
2053 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2054                                                 const u8 *addr,
2055                                                 struct p2p_message *msg)
2056 {
2057         struct p2p_device *dev;
2058
2059         dev = p2p_get_device(p2p, addr);
2060         if (dev) {
2061                 os_get_reltime(&dev->last_seen);
2062                 return dev; /* already known */
2063         }
2064
2065         dev = p2p_create_device(p2p, addr);
2066         if (dev == NULL)
2067                 return NULL;
2068
2069         p2p_add_dev_info(p2p, addr, dev, msg);
2070
2071         return dev;
2072 }
2073
2074
2075 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2076 {
2077         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2078                 return 1;
2079         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2080             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2081             WPA_GET_BE16(&req_dev_type[6]) == 0)
2082                 return 1; /* Category match with wildcard OUI/sub-category */
2083         return 0;
2084 }
2085
2086
2087 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2088                         size_t num_req_dev_type)
2089 {
2090         size_t i;
2091         for (i = 0; i < num_req_dev_type; i++) {
2092                 if (dev_type_match(dev_type, req_dev_type[i]))
2093                         return 1;
2094         }
2095         return 0;
2096 }
2097
2098
2099 /**
2100  * p2p_match_dev_type - Match local device type with requested type
2101  * @p2p: P2P module context from p2p_init()
2102  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2103  * Returns: 1 on match, 0 on mismatch
2104  *
2105  * This function can be used to match the Requested Device Type attribute in
2106  * WPS IE with the local device types for deciding whether to reply to a Probe
2107  * Request frame.
2108  */
2109 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2110 {
2111         struct wps_parse_attr attr;
2112         size_t i;
2113
2114         if (wps_parse_msg(wps, &attr))
2115                 return 1; /* assume no Requested Device Type attributes */
2116
2117         if (attr.num_req_dev_type == 0)
2118                 return 1; /* no Requested Device Type attributes -> match */
2119
2120         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2121                                 attr.num_req_dev_type))
2122                 return 1; /* Own Primary Device Type matches */
2123
2124         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2125                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2126                                         attr.req_dev_type,
2127                                         attr.num_req_dev_type))
2128                         return 1; /* Own Secondary Device Type matches */
2129         }
2130
2131         /* No matching device type found */
2132         return 0;
2133 }
2134
2135
2136 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2137 {
2138         struct wpabuf *buf;
2139         u8 *len;
2140         int pw_id = -1;
2141         size_t extra = 0;
2142
2143 #ifdef CONFIG_WIFI_DISPLAY
2144         if (p2p->wfd_ie_probe_resp)
2145                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2146 #endif /* CONFIG_WIFI_DISPLAY */
2147
2148         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2149                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2150
2151         if (p2p->query_count)
2152                 extra += MAX_SVC_ADV_IE_LEN;
2153
2154         buf = wpabuf_alloc(1000 + extra);
2155         if (buf == NULL)
2156                 return NULL;
2157
2158         if (p2p->go_neg_peer) {
2159                 /* Advertise immediate availability of WPS credential */
2160                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2161         }
2162
2163         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2164                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2165                 wpabuf_free(buf);
2166                 return NULL;
2167         }
2168
2169 #ifdef CONFIG_WIFI_DISPLAY
2170         if (p2p->wfd_ie_probe_resp)
2171                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2172 #endif /* CONFIG_WIFI_DISPLAY */
2173
2174         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2175                 wpabuf_put_buf(buf,
2176                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2177
2178         /* P2P IE */
2179         len = p2p_buf_add_ie_hdr(buf);
2180         p2p_buf_add_capability(buf, p2p->dev_capab &
2181                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2182         if (p2p->ext_listen_interval)
2183                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2184                                               p2p->ext_listen_interval);
2185         p2p_buf_add_device_info(buf, p2p, NULL);
2186         p2p_buf_update_ie_hdr(buf, len);
2187
2188         if (p2p->query_count) {
2189                 p2p_buf_add_service_instance(buf, p2p, p2p->query_count,
2190                                              p2p->query_hash,
2191                                              p2p->p2ps_adv_list);
2192         }
2193
2194         return buf;
2195 }
2196
2197
2198 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2199 {
2200         struct p2ps_advertisement *adv_data;
2201
2202         p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2203
2204         /* Wildcard always matches if we have actual services */
2205         if (os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0)
2206                 return p2p->p2ps_adv_list != NULL;
2207
2208         adv_data = p2p->p2ps_adv_list;
2209         while (adv_data) {
2210                 p2p_dbg(p2p, "ASP hash: %x =? %x", hash[0], adv_data->hash[0]);
2211                 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2212                         return 1;
2213                 adv_data = adv_data->next;
2214         }
2215
2216         return 0;
2217 }
2218
2219
2220 static enum p2p_probe_req_status
2221 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2222                 const u8 *bssid, const u8 *ie, size_t ie_len)
2223 {
2224         struct ieee802_11_elems elems;
2225         struct wpabuf *buf;
2226         struct ieee80211_mgmt *resp;
2227         struct p2p_message msg;
2228         struct wpabuf *ies;
2229
2230         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2231             ParseFailed) {
2232                 /* Ignore invalid Probe Request frames */
2233                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2234                 return P2P_PREQ_MALFORMED;
2235         }
2236
2237         if (elems.p2p == NULL) {
2238                 /* not a P2P probe - ignore it */
2239                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2240                 return P2P_PREQ_NOT_P2P;
2241         }
2242
2243         if (dst && !is_broadcast_ether_addr(dst) &&
2244             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2245                 /* Not sent to the broadcast address or our P2P Device Address
2246                  */
2247                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2248                         MAC2STR(dst));
2249                 return P2P_PREQ_NOT_PROCESSED;
2250         }
2251
2252         if (bssid && !is_broadcast_ether_addr(bssid)) {
2253                 /* Not sent to the Wildcard BSSID */
2254                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2255                         MAC2STR(bssid));
2256                 return P2P_PREQ_NOT_PROCESSED;
2257         }
2258
2259         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2260             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2261             0) {
2262                 /* not using P2P Wildcard SSID - ignore */
2263                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2264                 return P2P_PREQ_NOT_PROCESSED;
2265         }
2266
2267         if (supp_rates_11b_only(&elems)) {
2268                 /* Indicates support for 11b rates only */
2269                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2270                 return P2P_PREQ_NOT_P2P;
2271         }
2272
2273         os_memset(&msg, 0, sizeof(msg));
2274         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2275                 /* Could not parse P2P attributes */
2276                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2277                 return P2P_PREQ_NOT_P2P;
2278         }
2279
2280         p2p->p2ps_svc_found = 0;
2281
2282         if (msg.service_hash && msg.service_hash_count) {
2283                 const u8 *hash = msg.service_hash;
2284                 u8 *dest = p2p->query_hash;
2285                 u8 i;
2286
2287                 p2p->query_count = 0;
2288                 for (i = 0; i < msg.service_hash_count; i++) {
2289                         if (p2p_service_find_asp(p2p, hash)) {
2290                                 p2p->p2ps_svc_found = 1;
2291
2292                                 if (!os_memcmp(hash, p2p->wild_card_hash,
2293                                                P2PS_HASH_LEN)) {
2294                                         /* We found match(es) but wildcard
2295                                          * will return all */
2296                                         p2p->query_count = 1;
2297                                         os_memcpy(p2p->query_hash, hash,
2298                                                   P2PS_HASH_LEN);
2299                                         break;
2300                                 }
2301
2302                                 /* Save each matching hash */
2303                                 if (p2p->query_count < P2P_MAX_QUERY_HASH) {
2304                                         os_memcpy(dest, hash, P2PS_HASH_LEN);
2305                                         dest += P2PS_HASH_LEN;
2306                                         p2p->query_count++;
2307                                 } else {
2308                                         /* We found match(es) but too many to
2309                                          * return all */
2310                                         p2p->query_count = 0;
2311                                         break;
2312                                 }
2313                         }
2314                         hash += P2PS_HASH_LEN;
2315                 }
2316
2317                 p2p_dbg(p2p, "ASP adv found: %d", p2p->p2ps_svc_found);
2318
2319                 /* Probed hash unknown */
2320                 if (!p2p->p2ps_svc_found) {
2321                         p2p_parse_free(&msg);
2322                         return P2P_PREQ_NOT_PROCESSED;
2323                 }
2324         } else {
2325                 /* This is not a P2PS Probe Request */
2326                 p2p->query_count = 0;
2327                 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2328
2329                 if (!p2p->in_listen || !p2p->drv_in_listen) {
2330                         /* not in Listen state - ignore Probe Request */
2331                         p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2332                                 p2p->in_listen, p2p->drv_in_listen);
2333                         p2p_parse_free(&msg);
2334                         return P2P_PREQ_NOT_LISTEN;
2335                 }
2336         }
2337
2338         if (msg.device_id &&
2339             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2340                 /* Device ID did not match */
2341                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2342                         MAC2STR(msg.device_id));
2343                 p2p_parse_free(&msg);
2344                 return P2P_PREQ_NOT_PROCESSED;
2345         }
2346
2347         /* Check Requested Device Type match */
2348         if (msg.wps_attributes &&
2349             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2350                 /* No match with Requested Device Type */
2351                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2352                 p2p_parse_free(&msg);
2353                 return P2P_PREQ_NOT_PROCESSED;
2354         }
2355         p2p_parse_free(&msg);
2356
2357         if (!p2p->cfg->send_probe_resp) {
2358                 /* Response generated elsewhere */
2359                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2360                 return P2P_PREQ_NOT_PROCESSED;
2361         }
2362
2363         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2364
2365         /*
2366          * We do not really have a specific BSS that this frame is advertising,
2367          * so build a frame that has some information in valid format. This is
2368          * really only used for discovery purposes, not to learn exact BSS
2369          * parameters.
2370          */
2371         ies = p2p_build_probe_resp_ies(p2p);
2372         if (ies == NULL)
2373                 return P2P_PREQ_NOT_PROCESSED;
2374
2375         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2376         if (buf == NULL) {
2377                 wpabuf_free(ies);
2378                 return P2P_PREQ_NOT_PROCESSED;
2379         }
2380
2381         resp = NULL;
2382         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2383
2384         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2385                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2386         os_memcpy(resp->da, addr, ETH_ALEN);
2387         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2388         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2389         resp->u.probe_resp.beacon_int = host_to_le16(100);
2390         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2391         resp->u.probe_resp.capab_info =
2392                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2393                              WLAN_CAPABILITY_PRIVACY |
2394                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2395
2396         wpabuf_put_u8(buf, WLAN_EID_SSID);
2397         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2398         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2399
2400         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2401         wpabuf_put_u8(buf, 8);
2402         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2403         wpabuf_put_u8(buf, 90 / 5);
2404         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2405         wpabuf_put_u8(buf, 180 / 5);
2406         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2407         wpabuf_put_u8(buf, 360 / 5);
2408         wpabuf_put_u8(buf, 480 / 5);
2409         wpabuf_put_u8(buf, 540 / 5);
2410
2411         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2412         wpabuf_put_u8(buf, 1);
2413         wpabuf_put_u8(buf, p2p->cfg->channel);
2414
2415         wpabuf_put_buf(buf, ies);
2416         wpabuf_free(ies);
2417
2418         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2419
2420         wpabuf_free(buf);
2421
2422         return P2P_PREQ_NOT_PROCESSED;
2423 }
2424
2425
2426 enum p2p_probe_req_status
2427 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2428                  const u8 *bssid, const u8 *ie, size_t ie_len)
2429 {
2430         enum p2p_probe_req_status res;
2431
2432         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2433
2434         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2435         p2p->query_count = 0;
2436
2437         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2438             p2p->go_neg_peer &&
2439             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2440             == 0 &&
2441             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2442                 /* Received a Probe Request from GO Negotiation peer */
2443                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2444                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2445                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2446                 return P2P_PREQ_PROCESSED;
2447         }
2448
2449         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2450             p2p->invite_peer &&
2451             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2452             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2453             == 0) {
2454                 /* Received a Probe Request from Invite peer */
2455                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2456                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2457                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2458                 return P2P_PREQ_PROCESSED;
2459         }
2460
2461         return res;
2462 }
2463
2464
2465 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2466                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2467 {
2468         struct wpabuf *tmp;
2469         u8 *lpos;
2470         size_t tmplen;
2471         int res;
2472         u8 group_capab;
2473
2474         if (p2p_ie == NULL)
2475                 return 0; /* WLAN AP is not a P2P manager */
2476
2477         /*
2478          * (Re)Association Request - P2P IE
2479          * P2P Capability attribute (shall be present)
2480          * P2P Interface attribute (present if concurrent device and
2481          *      P2P Management is enabled)
2482          */
2483         tmp = wpabuf_alloc(200);
2484         if (tmp == NULL)
2485                 return -1;
2486
2487         lpos = p2p_buf_add_ie_hdr(tmp);
2488         group_capab = 0;
2489         if (p2p->num_groups > 0) {
2490                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2491                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2492                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2493                     p2p->cross_connect)
2494                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2495         }
2496         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2497         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2498             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2499                 p2p_buf_add_p2p_interface(tmp, p2p);
2500         p2p_buf_update_ie_hdr(tmp, lpos);
2501
2502         tmplen = wpabuf_len(tmp);
2503         if (tmplen > len)
2504                 res = -1;
2505         else {
2506                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2507                 res = tmplen;
2508         }
2509         wpabuf_free(tmp);
2510
2511         return res;
2512 }
2513
2514
2515 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2516                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2517 {
2518         struct wpabuf *tmp;
2519         u8 *lpos;
2520         struct p2p_device *peer;
2521         size_t tmplen;
2522         int res;
2523         size_t extra = 0;
2524
2525         if (!p2p_group)
2526                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2527
2528 #ifdef CONFIG_WIFI_DISPLAY
2529         if (p2p->wfd_ie_assoc_req)
2530                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2531 #endif /* CONFIG_WIFI_DISPLAY */
2532
2533         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2534                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2535
2536         /*
2537          * (Re)Association Request - P2P IE
2538          * P2P Capability attribute (shall be present)
2539          * Extended Listen Timing (may be present)
2540          * P2P Device Info attribute (shall be present)
2541          */
2542         tmp = wpabuf_alloc(200 + extra);
2543         if (tmp == NULL)
2544                 return -1;
2545
2546 #ifdef CONFIG_WIFI_DISPLAY
2547         if (p2p->wfd_ie_assoc_req)
2548                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2549 #endif /* CONFIG_WIFI_DISPLAY */
2550
2551         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2552                 wpabuf_put_buf(tmp,
2553                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2554
2555         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2556
2557         lpos = p2p_buf_add_ie_hdr(tmp);
2558         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2559         if (p2p->ext_listen_interval)
2560                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2561                                               p2p->ext_listen_interval);
2562         p2p_buf_add_device_info(tmp, p2p, peer);
2563         p2p_buf_update_ie_hdr(tmp, lpos);
2564
2565         tmplen = wpabuf_len(tmp);
2566         if (tmplen > len)
2567                 res = -1;
2568         else {
2569                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2570                 res = tmplen;
2571         }
2572         wpabuf_free(tmp);
2573
2574         return res;
2575 }
2576
2577
2578 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2579 {
2580         struct wpabuf *p2p_ie;
2581         int ret;
2582
2583         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2584         if (p2p_ie == NULL)
2585                 return 0;
2586
2587         ret = p2p_attr_text(p2p_ie, buf, end);
2588         wpabuf_free(p2p_ie);
2589         return ret;
2590 }
2591
2592
2593 struct p2ps_advertisement *
2594 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2595 {
2596         struct p2ps_advertisement *adv_data;
2597
2598         if (!p2p)
2599                 return NULL;
2600
2601         adv_data = p2p->p2ps_adv_list;
2602         while (adv_data) {
2603                 if (adv_data->id == adv_id)
2604                         return adv_data;
2605                 adv_data = adv_data->next;
2606         }
2607
2608         return NULL;
2609 }
2610
2611
2612 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2613 {
2614         struct p2ps_advertisement *adv_data;
2615         struct p2ps_advertisement **prior;
2616
2617         if (!p2p)
2618                 return -1;
2619
2620         adv_data = p2p->p2ps_adv_list;
2621         prior = &p2p->p2ps_adv_list;
2622         while (adv_data) {
2623                 if (adv_data->id == adv_id) {
2624                         p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2625                         *prior = adv_data->next;
2626                         os_free(adv_data);
2627                         return 0;
2628                 }
2629                 prior = &adv_data->next;
2630                 adv_data = adv_data->next;
2631         }
2632
2633         return -1;
2634 }
2635
2636
2637 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2638                         const char *adv_str, u8 svc_state, u16 config_methods,
2639                         const char *svc_info)
2640 {
2641         struct p2ps_advertisement *adv_data, *tmp, **prev;
2642         u8 buf[P2PS_HASH_LEN];
2643         size_t adv_data_len, adv_len, info_len = 0;
2644
2645         if (!p2p || !adv_str || !adv_str[0])
2646                 return -1;
2647
2648         if (!(config_methods & p2p->cfg->config_methods)) {
2649                 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2650                         config_methods, p2p->cfg->config_methods);
2651                 return -1;
2652         }
2653
2654         if (!p2ps_gen_hash(p2p, adv_str, buf))
2655                 return -1;
2656
2657         if (svc_info)
2658                 info_len = os_strlen(svc_info);
2659         adv_len = os_strlen(adv_str);
2660         adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2661                 info_len + 1;
2662
2663         adv_data = os_zalloc(adv_data_len);
2664         if (!adv_data)
2665                 return -1;
2666
2667         os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2668         adv_data->id = adv_id;
2669         adv_data->state = svc_state;
2670         adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2671         adv_data->auto_accept = (u8) auto_accept;
2672         os_memcpy(adv_data->svc_name, adv_str, adv_len);
2673
2674         if (svc_info && info_len) {
2675                 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2676                 os_memcpy(adv_data->svc_info, svc_info, info_len);
2677         }
2678
2679         /*
2680          * Group Advertisements by service string. They do not need to be
2681          * sorted, but groups allow easier Probe Response instance grouping
2682          */
2683         tmp = p2p->p2ps_adv_list;
2684         prev = &p2p->p2ps_adv_list;
2685         while (tmp) {
2686                 if (tmp->id == adv_data->id) {
2687                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2688                                 os_free(adv_data);
2689                                 return -1;
2690                         }
2691                         adv_data->next = tmp->next;
2692                         *prev = adv_data;
2693                         os_free(tmp);
2694                         goto inserted;
2695                 } else {
2696                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2697                                 adv_data->next = tmp->next;
2698                                 tmp->next = adv_data;
2699                                 goto inserted;
2700                         }
2701                 }
2702                 prev = &tmp->next;
2703                 tmp = tmp->next;
2704         }
2705
2706         /* No svc_name match found */
2707         adv_data->next = p2p->p2ps_adv_list;
2708         p2p->p2ps_adv_list = adv_data;
2709
2710 inserted:
2711         p2p_dbg(p2p,
2712                 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'",
2713                 adv_id, adv_data->config_methods, svc_state, adv_str);
2714
2715         return 0;
2716 }
2717
2718
2719 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2720 {
2721         struct p2p_message msg;
2722
2723         os_memset(&msg, 0, sizeof(msg));
2724         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2725                 return -1;
2726
2727         if (msg.p2p_device_addr) {
2728                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2729                 return 0;
2730         } else if (msg.device_id) {
2731                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2732                 return 0;
2733         }
2734         return -1;
2735 }
2736
2737
2738 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2739 {
2740         struct wpabuf *p2p_ie;
2741         int ret;
2742
2743         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2744                                              P2P_IE_VENDOR_TYPE);
2745         if (p2p_ie == NULL)
2746                 return -1;
2747         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2748         wpabuf_free(p2p_ie);
2749         return ret;
2750 }
2751
2752
2753 static void p2p_clear_go_neg(struct p2p_data *p2p)
2754 {
2755         p2p->go_neg_peer = NULL;
2756         p2p_clear_timeout(p2p);
2757         p2p_set_state(p2p, P2P_IDLE);
2758 }
2759
2760
2761 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2762 {
2763         if (p2p->go_neg_peer == NULL) {
2764                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2765                 return; /* No pending Group Formation */
2766         }
2767
2768         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2769             0) {
2770                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2771                         MACSTR " (GO Negotiation peer " MACSTR ")",
2772                         MAC2STR(mac_addr),
2773                         MAC2STR(p2p->go_neg_peer->intended_addr));
2774                 return; /* Ignore unexpected peer address */
2775         }
2776
2777         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2778                 MAC2STR(mac_addr));
2779
2780         p2p_clear_go_neg(p2p);
2781 }
2782
2783
2784 void p2p_group_formation_failed(struct p2p_data *p2p)
2785 {
2786         if (p2p->go_neg_peer == NULL) {
2787                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2788                 return; /* No pending Group Formation */
2789         }
2790
2791         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2792                 MAC2STR(p2p->go_neg_peer->intended_addr));
2793
2794         p2p_clear_go_neg(p2p);
2795 }
2796
2797
2798 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2799 {
2800         struct p2p_data *p2p;
2801
2802         if (cfg->max_peers < 1 ||
2803             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2804                 return NULL;
2805
2806         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2807         if (p2p == NULL)
2808                 return NULL;
2809         p2p->cfg = (struct p2p_config *) (p2p + 1);
2810         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2811         if (cfg->dev_name)
2812                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2813         if (cfg->manufacturer)
2814                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2815         if (cfg->model_name)
2816                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2817         if (cfg->model_number)
2818                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2819         if (cfg->serial_number)
2820                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2821         if (cfg->pref_chan) {
2822                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2823                                                 sizeof(struct p2p_channel));
2824                 if (p2p->cfg->pref_chan) {
2825                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2826                                   cfg->num_pref_chan *
2827                                   sizeof(struct p2p_channel));
2828                 } else
2829                         p2p->cfg->num_pref_chan = 0;
2830         }
2831
2832         p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2833
2834         p2p->min_disc_int = 1;
2835         p2p->max_disc_int = 3;
2836         p2p->max_disc_tu = -1;
2837
2838         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2839                 p2p->next_tie_breaker = 0;
2840         p2p->next_tie_breaker &= 0x01;
2841         if (cfg->sd_request)
2842                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2843         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2844         if (cfg->concurrent_operations)
2845                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2846         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2847
2848         dl_list_init(&p2p->devices);
2849
2850         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2851                                p2p_expiration_timeout, p2p, NULL);
2852
2853         p2p->go_timeout = 100;
2854         p2p->client_timeout = 20;
2855         p2p->num_p2p_sd_queries = 0;
2856
2857         p2p_dbg(p2p, "initialized");
2858         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2859         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2860
2861         return p2p;
2862 }
2863
2864
2865 void p2p_deinit(struct p2p_data *p2p)
2866 {
2867         struct p2ps_advertisement *adv, *prev;
2868
2869 #ifdef CONFIG_WIFI_DISPLAY
2870         wpabuf_free(p2p->wfd_ie_beacon);
2871         wpabuf_free(p2p->wfd_ie_probe_req);
2872         wpabuf_free(p2p->wfd_ie_probe_resp);
2873         wpabuf_free(p2p->wfd_ie_assoc_req);
2874         wpabuf_free(p2p->wfd_ie_invitation);
2875         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2876         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2877         wpabuf_free(p2p->wfd_ie_go_neg);
2878         wpabuf_free(p2p->wfd_dev_info);
2879         wpabuf_free(p2p->wfd_assoc_bssid);
2880         wpabuf_free(p2p->wfd_coupled_sink_info);
2881 #endif /* CONFIG_WIFI_DISPLAY */
2882
2883         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2884         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2885         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2886         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2887         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2888         p2p_flush(p2p);
2889         p2p_free_req_dev_types(p2p);
2890         os_free(p2p->cfg->dev_name);
2891         os_free(p2p->cfg->manufacturer);
2892         os_free(p2p->cfg->model_name);
2893         os_free(p2p->cfg->model_number);
2894         os_free(p2p->cfg->serial_number);
2895         os_free(p2p->cfg->pref_chan);
2896         os_free(p2p->groups);
2897         os_free(p2p->p2ps_prov);
2898         wpabuf_free(p2p->sd_resp);
2899         os_free(p2p->after_scan_tx);
2900         p2p_remove_wps_vendor_extensions(p2p);
2901         os_free(p2p->no_go_freq.range);
2902
2903         adv = p2p->p2ps_adv_list;
2904         while (adv) {
2905                 prev = adv;
2906                 adv = adv->next;
2907                 os_free(prev);
2908         }
2909
2910         os_free(p2p);
2911 }
2912
2913
2914 void p2p_flush(struct p2p_data *p2p)
2915 {
2916         struct p2p_device *dev, *prev;
2917         p2p_stop_find(p2p);
2918         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2919                               list) {
2920                 dl_list_del(&dev->list);
2921                 p2p_device_free(p2p, dev);
2922         }
2923         p2p_free_sd_queries(p2p);
2924         os_free(p2p->after_scan_tx);
2925         p2p->after_scan_tx = NULL;
2926 }
2927
2928
2929 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2930 {
2931         struct p2p_device *dev;
2932
2933         dev = p2p_get_device(p2p, addr);
2934         if (dev == NULL)
2935                 return -1;
2936
2937         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2938
2939         if (p2p->go_neg_peer == dev) {
2940                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2941                 p2p->go_neg_peer = NULL;
2942         }
2943
2944         dev->wps_method = WPS_NOT_READY;
2945         dev->oob_pw_id = 0;
2946         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2947         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2948
2949         /* Check if after_scan_tx is for this peer. If so free it */
2950         if (p2p->after_scan_tx &&
2951             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2952                 os_free(p2p->after_scan_tx);
2953                 p2p->after_scan_tx = NULL;
2954         }
2955
2956         return 0;
2957 }
2958
2959
2960 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2961 {
2962         os_free(p2p->cfg->dev_name);
2963         if (dev_name) {
2964                 p2p->cfg->dev_name = os_strdup(dev_name);
2965                 if (p2p->cfg->dev_name == NULL)
2966                         return -1;
2967         } else
2968                 p2p->cfg->dev_name = NULL;
2969         return 0;
2970 }
2971
2972
2973 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2974 {
2975         os_free(p2p->cfg->manufacturer);
2976         p2p->cfg->manufacturer = NULL;
2977         if (manufacturer) {
2978                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2979                 if (p2p->cfg->manufacturer == NULL)
2980                         return -1;
2981         }
2982
2983         return 0;
2984 }
2985
2986
2987 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2988 {
2989         os_free(p2p->cfg->model_name);
2990         p2p->cfg->model_name = NULL;
2991         if (model_name) {
2992                 p2p->cfg->model_name = os_strdup(model_name);
2993                 if (p2p->cfg->model_name == NULL)
2994                         return -1;
2995         }
2996
2997         return 0;
2998 }
2999
3000
3001 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3002 {
3003         os_free(p2p->cfg->model_number);
3004         p2p->cfg->model_number = NULL;
3005         if (model_number) {
3006                 p2p->cfg->model_number = os_strdup(model_number);
3007                 if (p2p->cfg->model_number == NULL)
3008                         return -1;
3009         }
3010
3011         return 0;
3012 }
3013
3014
3015 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3016 {
3017         os_free(p2p->cfg->serial_number);
3018         p2p->cfg->serial_number = NULL;
3019         if (serial_number) {
3020                 p2p->cfg->serial_number = os_strdup(serial_number);
3021                 if (p2p->cfg->serial_number == NULL)
3022                         return -1;
3023         }
3024
3025         return 0;
3026 }
3027
3028
3029 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3030 {
3031         p2p->cfg->config_methods = config_methods;
3032 }
3033
3034
3035 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3036 {
3037         os_memcpy(p2p->cfg->uuid, uuid, 16);
3038 }
3039
3040
3041 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3042 {
3043         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3044         return 0;
3045 }
3046
3047
3048 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3049                           size_t num_dev_types)
3050 {
3051         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3052                 num_dev_types = P2P_SEC_DEVICE_TYPES;
3053         p2p->cfg->num_sec_dev_types = num_dev_types;
3054         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3055         return 0;
3056 }
3057
3058
3059 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3060 {
3061         int i;
3062
3063         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3064                 wpabuf_free(p2p->wps_vendor_ext[i]);
3065                 p2p->wps_vendor_ext[i] = NULL;
3066         }
3067 }
3068
3069
3070 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3071                                  const struct wpabuf *vendor_ext)
3072 {
3073         int i;
3074
3075         if (vendor_ext == NULL)
3076                 return -1;
3077
3078         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3079                 if (p2p->wps_vendor_ext[i] == NULL)
3080                         break;
3081         }
3082         if (i >= P2P_MAX_WPS_VENDOR_EXT)
3083                 return -1;
3084
3085         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3086         if (p2p->wps_vendor_ext[i] == NULL)
3087                 return -1;
3088
3089         return 0;
3090 }
3091
3092
3093 int p2p_set_country(struct p2p_data *p2p, const char *country)
3094 {
3095         os_memcpy(p2p->cfg->country, country, 3);
3096         return 0;
3097 }
3098
3099
3100 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3101 {
3102         if (dev->sd_pending_bcast_queries == 0) {
3103                 /* Initialize with total number of registered broadcast
3104                  * SD queries. */
3105                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3106         }
3107
3108         if (p2p_start_sd(p2p, dev) == 0)
3109                 return 1;
3110
3111         if (dev->req_config_methods &&
3112             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3113                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3114                         MACSTR " (config methods 0x%x)",
3115                         MAC2STR(dev->info.p2p_device_addr),
3116                         dev->req_config_methods);
3117                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3118                         return 1;
3119         }
3120
3121         return 0;
3122 }
3123
3124
3125 void p2p_continue_find(struct p2p_data *p2p)
3126 {
3127         struct p2p_device *dev;
3128         int found;
3129
3130         p2p_set_state(p2p, P2P_SEARCH);
3131
3132         /* Continue from the device following the last iteration */
3133         found = 0;
3134         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3135                 if (dev == p2p->last_p2p_find_oper) {
3136                         found = 1;
3137                         continue;
3138                 }
3139                 if (!found)
3140                         continue;
3141                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3142                         p2p->last_p2p_find_oper = dev;
3143                         return;
3144                 }
3145         }
3146
3147         /*
3148          * Wrap around to the beginning of the list and continue until the last
3149          * iteration device.
3150          */
3151         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3152                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3153                         p2p->last_p2p_find_oper = dev;
3154                         return;
3155                 }
3156                 if (dev == p2p->last_p2p_find_oper)
3157                         break;
3158         }
3159
3160         p2p_listen_in_find(p2p, 1);
3161 }
3162
3163
3164 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3165 {
3166         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3167                 success);
3168         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3169
3170         if (!success) {
3171                 if (p2p->sd_peer)
3172                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3173                 p2p->sd_peer = NULL;
3174                 p2p_continue_find(p2p);
3175                 return;
3176         }
3177
3178         if (p2p->sd_peer == NULL) {
3179                 p2p_dbg(p2p, "No SD peer entry known");
3180                 p2p_continue_find(p2p);
3181                 return;
3182         }
3183
3184         if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3185                 /* Update the pending broadcast SD query count for this device
3186                  */
3187                 p2p->sd_peer->sd_pending_bcast_queries--;
3188
3189                 /*
3190                  * If there are no pending broadcast queries for this device,
3191                  * mark it as done (-1).
3192                  */
3193                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3194                         p2p->sd_peer->sd_pending_bcast_queries = -1;
3195         }
3196
3197         /* Wait for response from the peer */
3198         p2p_set_state(p2p, P2P_SD_DURING_FIND);
3199         p2p_set_timeout(p2p, 0, 200000);
3200 }
3201
3202
3203 /**
3204  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3205  * @p2p: P2P module context from p2p_init()
3206  */
3207 static void p2p_retry_pd(struct p2p_data *p2p)
3208 {
3209         struct p2p_device *dev;
3210
3211         if (p2p->state != P2P_IDLE)
3212                 return;
3213
3214         /*
3215          * Retry the prov disc req attempt only for the peer that the user had
3216          * requested.
3217          */
3218
3219         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3220                 if (os_memcmp(p2p->pending_pd_devaddr,
3221                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
3222                         continue;
3223                 if (!dev->req_config_methods)
3224                         continue;
3225
3226                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3227                         MACSTR " (config methods 0x%x)",
3228                         MAC2STR(dev->info.p2p_device_addr),
3229                         dev->req_config_methods);
3230                 p2p_send_prov_disc_req(p2p, dev,
3231                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
3232                                        p2p->pd_force_freq);
3233                 return;
3234         }
3235 }
3236
3237
3238 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3239 {
3240         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3241                 success);
3242
3243         /*
3244          * Postpone resetting the pending action state till after we actually
3245          * time out. This allows us to take some action like notifying any
3246          * interested parties about no response to the request.
3247          *
3248          * When the timer (below) goes off we check in IDLE, SEARCH, or
3249          * LISTEN_ONLY state, which are the only allowed states to issue a PD
3250          * requests in, if this was still pending and then raise notification.
3251          */
3252
3253         if (!success) {
3254                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3255
3256                 if (p2p->user_initiated_pd &&
3257                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3258                 {
3259                         /* Retry request from timeout to avoid busy loops */
3260                         p2p->pending_action_state = P2P_PENDING_PD;
3261                         p2p_set_timeout(p2p, 0, 50000);
3262                 } else if (p2p->state != P2P_IDLE)
3263                         p2p_continue_find(p2p);
3264                 else if (p2p->user_initiated_pd) {
3265                         p2p->pending_action_state = P2P_PENDING_PD;
3266                         p2p_set_timeout(p2p, 0, 300000);
3267                 }
3268                 return;
3269         }
3270
3271         /*
3272          * This postponing, of resetting pending_action_state, needs to be
3273          * done only for user initiated PD requests and not internal ones.
3274          */
3275         if (p2p->user_initiated_pd)
3276                 p2p->pending_action_state = P2P_PENDING_PD;
3277         else
3278                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3279
3280         /* Wait for response from the peer */
3281         if (p2p->state == P2P_SEARCH)
3282                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3283         p2p_set_timeout(p2p, 0, 200000);
3284 }
3285
3286
3287 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3288                          struct os_reltime *rx_time, int level, const u8 *ies,
3289                          size_t ies_len)
3290 {
3291         if (os_reltime_before(rx_time, &p2p->find_start)) {
3292                 /*
3293                  * The driver may have cached (e.g., in cfg80211 BSS table) the
3294                  * scan results for relatively long time. To avoid reporting
3295                  * stale information, update P2P peers only based on results
3296                  * that have based on frames received after the last p2p_find
3297                  * operation was started.
3298                  */
3299                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3300                         " (rx_time=%u.%06u)",
3301                         MAC2STR(bssid), (unsigned int) rx_time->sec,
3302                         (unsigned int) rx_time->usec);
3303                 return 0;
3304         }
3305
3306         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3307
3308         return 0;
3309 }
3310
3311
3312 void p2p_scan_res_handled(struct p2p_data *p2p)
3313 {
3314         if (!p2p->p2p_scan_running) {
3315                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3316         }
3317         p2p->p2p_scan_running = 0;
3318         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3319
3320         if (p2p_run_after_scan(p2p))
3321                 return;
3322         if (p2p->state == P2P_SEARCH)
3323                 p2p_continue_find(p2p);
3324 }
3325
3326
3327 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3328 {
3329         u8 dev_capab;
3330         u8 *len;
3331
3332 #ifdef CONFIG_WIFI_DISPLAY
3333         if (p2p->wfd_ie_probe_req)
3334                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3335 #endif /* CONFIG_WIFI_DISPLAY */
3336
3337         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3338                 wpabuf_put_buf(ies,
3339                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3340
3341         len = p2p_buf_add_ie_hdr(ies);
3342
3343         dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3344
3345         /* P2PS requires Probe Request frames to include SD bit */
3346         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3347                 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3348
3349         p2p_buf_add_capability(ies, dev_capab, 0);
3350
3351         if (dev_id)
3352                 p2p_buf_add_device_id(ies, dev_id);
3353         if (p2p->cfg->reg_class && p2p->cfg->channel)
3354                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3355                                            p2p->cfg->reg_class,
3356                                            p2p->cfg->channel);
3357         if (p2p->ext_listen_interval)
3358                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3359                                               p2p->ext_listen_interval);
3360
3361         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3362                 p2p_buf_add_service_hash(ies, p2p);
3363
3364         /* TODO: p2p_buf_add_operating_channel() if GO */
3365         p2p_buf_update_ie_hdr(ies, len);
3366 }
3367
3368
3369 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3370 {
3371         size_t len = 100;
3372
3373 #ifdef CONFIG_WIFI_DISPLAY
3374         if (p2p && p2p->wfd_ie_probe_req)
3375                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3376 #endif /* CONFIG_WIFI_DISPLAY */
3377
3378         if (p2p && p2p->vendor_elem &&
3379             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3380                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3381
3382         return len;
3383 }
3384
3385
3386 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3387 {
3388         return p2p_attr_text(p2p_ie, buf, end);
3389 }
3390
3391
3392 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3393 {
3394         struct p2p_device *dev = p2p->go_neg_peer;
3395         int timeout;
3396
3397         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3398
3399         if (dev == NULL) {
3400                 p2p_dbg(p2p, "No pending GO Negotiation");
3401                 return;
3402         }
3403
3404         if (success) {
3405                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3406                         p2p_set_state(p2p, P2P_IDLE);
3407                         return;
3408                 }
3409         } else if (dev->go_neg_req_sent) {
3410                 /* Cancel the increment from p2p_connect_send() on failure */
3411                 dev->go_neg_req_sent--;
3412         }
3413
3414         if (!success &&
3415             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3416             !is_zero_ether_addr(dev->member_in_go_dev)) {
3417                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3418                         MAC2STR(dev->info.p2p_device_addr));
3419                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3420                 p2p_send_dev_disc_req(p2p, dev);
3421                 return;
3422         }
3423
3424         /*
3425          * Use P2P find, if needed, to find the other device from its listen
3426          * channel.
3427          */
3428         p2p_set_state(p2p, P2P_CONNECT);
3429         timeout = success ? 500000 : 100000;
3430         if (!success && p2p->go_neg_peer &&
3431             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3432                 unsigned int r;
3433                 /*
3434                  * Peer is expected to wait our response and we will skip the
3435                  * listen phase. Add some randomness to the wait time here to
3436                  * make it less likely to hit cases where we could end up in
3437                  * sync with peer not listening.
3438                  */
3439                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3440                         r = 0;
3441                 timeout += r % 100000;
3442         }
3443         p2p_set_timeout(p2p, 0, timeout);
3444 }
3445
3446
3447 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3448 {
3449         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3450                 success);
3451         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3452                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3453                 return;
3454         }
3455         p2p_set_state(p2p, P2P_CONNECT);
3456         p2p_set_timeout(p2p, 0, 500000);
3457 }
3458
3459
3460 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3461                                        const u8 *addr)
3462 {
3463         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3464         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3465                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3466         } else if (success) {
3467                 struct p2p_device *dev;
3468                 dev = p2p_get_device(p2p, addr);
3469                 if (dev &&
3470                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3471                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3472         }
3473 }
3474
3475
3476 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3477                                enum p2p_send_action_result result)
3478 {
3479         struct p2p_device *dev;
3480
3481         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3482         if (result == P2P_SEND_ACTION_FAILED) {
3483                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3484                 p2p_go_neg_failed(p2p, -1);
3485                 return;
3486         }
3487
3488         dev = p2p->go_neg_peer;
3489
3490         if (result == P2P_SEND_ACTION_NO_ACK) {
3491                 /*
3492                  * Retry GO Negotiation Confirmation
3493                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3494                  * ACK for confirmation.
3495                  */
3496                 if (dev && dev->go_neg_conf &&
3497                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3498                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3499                                 dev->go_neg_conf_sent);
3500                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3501                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3502                                             dev->info.p2p_device_addr,
3503                                             p2p->cfg->dev_addr,
3504                                             dev->info.p2p_device_addr,
3505                                             wpabuf_head(dev->go_neg_conf),
3506                                             wpabuf_len(dev->go_neg_conf), 0) >=
3507                             0) {
3508                                 dev->go_neg_conf_sent++;
3509                                 return;
3510                         }
3511                         p2p_dbg(p2p, "Failed to re-send Action frame");
3512
3513                         /*
3514                          * Continue with the assumption that the first attempt
3515                          * went through and just the ACK frame was lost.
3516                          */
3517                 }
3518
3519                 /*
3520                  * It looks like the TX status for GO Negotiation Confirm is
3521                  * often showing failure even when the peer has actually
3522                  * received the frame. Since the peer may change channels
3523                  * immediately after having received the frame, we may not see
3524                  * an Ack for retries, so just dropping a single frame may
3525                  * trigger this. To allow the group formation to succeed if the
3526                  * peer did indeed receive the frame, continue regardless of
3527                  * the TX status.
3528                  */
3529                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3530         }
3531
3532         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3533
3534         if (dev == NULL)
3535                 return;
3536
3537         p2p_go_complete(p2p, dev);
3538 }
3539
3540
3541 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3542                         const u8 *src, const u8 *bssid,
3543                         enum p2p_send_action_result result)
3544 {
3545         enum p2p_pending_action_state state;
3546         int success;
3547
3548         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3549                 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3550                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3551                 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3552         success = result == P2P_SEND_ACTION_SUCCESS;
3553         state = p2p->pending_action_state;
3554         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3555         switch (state) {
3556         case P2P_NO_PENDING_ACTION:
3557                 if (p2p->send_action_in_progress) {
3558                         p2p->send_action_in_progress = 0;
3559                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3560                 }
3561                 if (p2p->after_scan_tx_in_progress) {
3562                         p2p->after_scan_tx_in_progress = 0;
3563                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3564                             p2p_run_after_scan(p2p))
3565                                 break;
3566                         if (p2p->state == P2P_SEARCH) {
3567                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3568                                 p2p_continue_find(p2p);
3569                         }
3570                 }
3571                 break;
3572         case P2P_PENDING_GO_NEG_REQUEST:
3573                 p2p_go_neg_req_cb(p2p, success);
3574                 break;
3575         case P2P_PENDING_GO_NEG_RESPONSE:
3576                 p2p_go_neg_resp_cb(p2p, success);
3577                 break;
3578         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3579                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3580                 break;
3581         case P2P_PENDING_GO_NEG_CONFIRM:
3582                 p2p_go_neg_conf_cb(p2p, result);
3583                 break;
3584         case P2P_PENDING_SD:
3585                 p2p_sd_cb(p2p, success);
3586                 break;
3587         case P2P_PENDING_PD:
3588                 p2p_prov_disc_cb(p2p, success);
3589                 break;
3590         case P2P_PENDING_INVITATION_REQUEST:
3591                 p2p_invitation_req_cb(p2p, success);
3592                 break;
3593         case P2P_PENDING_INVITATION_RESPONSE:
3594                 p2p_invitation_resp_cb(p2p, success);
3595                 break;
3596         case P2P_PENDING_DEV_DISC_REQUEST:
3597                 p2p_dev_disc_req_cb(p2p, success);
3598                 break;
3599         case P2P_PENDING_DEV_DISC_RESPONSE:
3600                 p2p_dev_disc_resp_cb(p2p, success);
3601                 break;
3602         case P2P_PENDING_GO_DISC_REQ:
3603                 p2p_go_disc_req_cb(p2p, success);
3604                 break;
3605         }
3606
3607         p2p->after_scan_tx_in_progress = 0;
3608 }
3609
3610
3611 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3612                    unsigned int duration)
3613 {
3614         if (freq == p2p->pending_client_disc_freq) {
3615                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3616                 p2p->pending_client_disc_freq = 0;
3617                 return;
3618         }
3619
3620         if (freq != p2p->pending_listen_freq) {
3621                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3622                         freq, duration, p2p->pending_listen_freq);
3623                 return;
3624         }
3625
3626         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3627                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3628                 p2p->pending_listen_freq);
3629         p2p->in_listen = 1;
3630         p2p->drv_in_listen = freq;
3631         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3632                 /*
3633                  * Add 20 msec extra wait to avoid race condition with driver
3634                  * remain-on-channel end event, i.e., give driver more time to
3635                  * complete the operation before our timeout expires.
3636                  */
3637                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3638                                 p2p->pending_listen_usec + 20000);
3639         }
3640
3641         p2p->pending_listen_freq = 0;
3642 }
3643
3644
3645 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3646 {
3647         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3648         p2p->drv_in_listen = 0;
3649         if (p2p->in_listen)
3650                 return 0; /* Internal timeout will trigger the next step */
3651
3652         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3653                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3654                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3655                         p2p_go_neg_failed(p2p, -1);
3656                         return 0;
3657                 }
3658
3659                 p2p_set_state(p2p, P2P_CONNECT);
3660                 p2p_connect_send(p2p, p2p->go_neg_peer);
3661                 return 1;
3662         } else if (p2p->state == P2P_SEARCH) {
3663                 if (p2p->p2p_scan_running) {
3664                          /*
3665                           * Search is already in progress. This can happen if
3666                           * an Action frame RX is reported immediately after
3667                           * the end of a remain-on-channel operation and the
3668                           * response frame to that is sent using an offchannel
3669                           * operation while in p2p_find. Avoid an attempt to
3670                           * restart a scan here.
3671                           */
3672                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3673                         return 1;
3674                 }
3675                 if (p2p->pending_listen_freq) {
3676                         /*
3677                          * Better wait a bit if the driver is unable to start
3678                          * offchannel operation for some reason. p2p_search()
3679                          * will be started from internal timeout.
3680                          */
3681                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3682                         p2p_set_timeout(p2p, 0, 100000);
3683                         return 1;
3684                 }
3685                 if (p2p->search_delay) {
3686                         p2p_dbg(p2p, "Delay search operation by %u ms",
3687                                 p2p->search_delay);
3688                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3689                                         (p2p->search_delay % 1000) * 1000);
3690                         return 1;
3691                 }
3692                 p2p_search(p2p);
3693                 return 1;
3694         }
3695
3696         return 0;
3697 }
3698
3699
3700 static void p2p_timeout_connect(struct p2p_data *p2p)
3701 {
3702         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3703         if (p2p->go_neg_peer &&
3704             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3705                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3706                 p2p_go_neg_failed(p2p, -1);
3707                 return;
3708         }
3709         if (p2p->go_neg_peer &&
3710             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3711             p2p->go_neg_peer->connect_reqs < 120) {
3712                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3713                 p2p_connect_send(p2p, p2p->go_neg_peer);
3714                 return;
3715         }
3716         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3717                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3718                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3719                 p2p_set_timeout(p2p, 0, 30000);
3720                 return;
3721         }
3722         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3723         p2p_listen_in_find(p2p, 0);
3724 }
3725
3726
3727 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3728 {
3729         if (p2p->go_neg_peer) {
3730                 if (p2p->drv_in_listen) {
3731                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3732                         return;
3733                 }
3734
3735                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3736                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3737                         p2p_go_neg_failed(p2p, -1);
3738                         return;
3739                 }
3740
3741                 p2p_set_state(p2p, P2P_CONNECT);
3742                 p2p_connect_send(p2p, p2p->go_neg_peer);
3743         } else
3744                 p2p_set_state(p2p, P2P_IDLE);
3745 }
3746
3747
3748 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3749 {
3750         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3751
3752         if (p2p->cfg->is_concurrent_session_active &&
3753             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3754                 p2p_set_timeout(p2p, 0, 500000);
3755         else
3756                 p2p_set_timeout(p2p, 0, 200000);
3757 }
3758
3759
3760 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3761 {
3762         struct p2p_device *dev = p2p->go_neg_peer;
3763
3764         if (dev == NULL) {
3765                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3766                 return;
3767         }
3768
3769         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3770         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3771         p2p_listen_in_find(p2p, 0);
3772 }
3773
3774
3775 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3776 {
3777         p2p_dbg(p2p, "Service Discovery Query timeout");
3778         if (p2p->sd_peer) {
3779                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3780                 p2p->sd_peer = NULL;
3781         }
3782         p2p_continue_find(p2p);
3783 }
3784
3785
3786 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3787 {
3788         p2p_dbg(p2p, "Provision Discovery Request timeout");
3789         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3790         p2p_continue_find(p2p);
3791 }
3792
3793
3794 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3795 {
3796         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3797
3798         /*
3799          * For user initiated PD requests that we have not gotten any responses
3800          * for while in IDLE state, we retry them a couple of times before
3801          * giving up.
3802          */
3803         if (!p2p->user_initiated_pd)
3804                 return;
3805
3806         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3807
3808         if (p2p->pd_retries) {
3809                 p2p->pd_retries--;
3810                 p2p_retry_pd(p2p);
3811         } else {
3812                 struct p2p_device *dev;
3813                 int for_join = 0;
3814
3815                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3816                         if (os_memcmp(p2p->pending_pd_devaddr,
3817                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3818                                 continue;
3819                         if (dev->req_config_methods &&
3820                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3821                                 for_join = 1;
3822                 }
3823
3824                 if (p2p->cfg->prov_disc_fail)
3825                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3826                                                  p2p->pending_pd_devaddr,
3827                                                  for_join ?
3828                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3829                                                  P2P_PROV_DISC_TIMEOUT);
3830                 p2p_reset_pending_pd(p2p);
3831         }
3832 }
3833
3834
3835 static void p2p_timeout_invite(struct p2p_data *p2p)
3836 {
3837         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3838         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3839         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3840                 /*
3841                  * Better remain on operating channel instead of listen channel
3842                  * when running a group.
3843                  */
3844                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3845                 p2p_set_timeout(p2p, 0, 100000);
3846                 return;
3847         }
3848         p2p_listen_in_find(p2p, 0);
3849 }
3850
3851
3852 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3853 {
3854         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3855                 p2p_set_state(p2p, P2P_INVITE);
3856                 p2p_invite_send(p2p, p2p->invite_peer,
3857                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3858         } else {
3859                 if (p2p->invite_peer) {
3860                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3861                         if (p2p->cfg->invitation_result)
3862                                 p2p->cfg->invitation_result(
3863                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3864                                         p2p->invite_peer->info.p2p_device_addr,
3865                                         0, 0);
3866                 }
3867                 p2p_set_state(p2p, P2P_IDLE);
3868         }
3869 }
3870
3871
3872 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3873 {
3874         struct p2p_data *p2p = eloop_ctx;
3875
3876         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3877
3878         p2p->in_listen = 0;
3879         if (p2p->drv_in_listen) {
3880                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3881                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3882         }
3883
3884         switch (p2p->state) {
3885         case P2P_IDLE:
3886                 /* Check if we timed out waiting for PD req */
3887                 if (p2p->pending_action_state == P2P_PENDING_PD)
3888                         p2p_timeout_prov_disc_req(p2p);
3889                 break;
3890         case P2P_SEARCH:
3891                 /* Check if we timed out waiting for PD req */
3892                 if (p2p->pending_action_state == P2P_PENDING_PD)
3893                         p2p_timeout_prov_disc_req(p2p);
3894                 if (p2p->search_delay && !p2p->in_search_delay) {
3895                         p2p_dbg(p2p, "Delay search operation by %u ms",
3896                                 p2p->search_delay);
3897                         p2p->in_search_delay = 1;
3898                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3899                                         (p2p->search_delay % 1000) * 1000);
3900                         break;
3901                 }
3902                 p2p->in_search_delay = 0;
3903                 p2p_search(p2p);
3904                 break;
3905         case P2P_CONNECT:
3906                 p2p_timeout_connect(p2p);
3907                 break;
3908         case P2P_CONNECT_LISTEN:
3909                 p2p_timeout_connect_listen(p2p);
3910                 break;
3911         case P2P_GO_NEG:
3912                 break;
3913         case P2P_LISTEN_ONLY:
3914                 /* Check if we timed out waiting for PD req */
3915                 if (p2p->pending_action_state == P2P_PENDING_PD)
3916                         p2p_timeout_prov_disc_req(p2p);
3917
3918                 if (p2p->ext_listen_only) {
3919                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3920                         p2p->ext_listen_only = 0;
3921                         p2p_set_state(p2p, P2P_IDLE);
3922                 }
3923                 break;
3924         case P2P_WAIT_PEER_CONNECT:
3925                 p2p_timeout_wait_peer_connect(p2p);
3926                 break;
3927         case P2P_WAIT_PEER_IDLE:
3928                 p2p_timeout_wait_peer_idle(p2p);
3929                 break;
3930         case P2P_SD_DURING_FIND:
3931                 p2p_timeout_sd_during_find(p2p);
3932                 break;
3933         case P2P_PROVISIONING:
3934                 break;
3935         case P2P_PD_DURING_FIND:
3936                 p2p_timeout_prov_disc_during_find(p2p);
3937                 break;
3938         case P2P_INVITE:
3939                 p2p_timeout_invite(p2p);
3940                 break;
3941         case P2P_INVITE_LISTEN:
3942                 p2p_timeout_invite_listen(p2p);
3943                 break;
3944         }
3945 }
3946
3947
3948 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3949 {
3950         struct p2p_device *dev;
3951
3952         dev = p2p_get_device(p2p, peer_addr);
3953         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3954                 MACSTR, MAC2STR(peer_addr));
3955         if (dev == NULL) {
3956                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3957                 return -1;
3958         }
3959         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3960         dev->flags |= P2P_DEV_USER_REJECTED;
3961         return 0;
3962 }
3963
3964
3965 const char * p2p_wps_method_text(enum p2p_wps_method method)
3966 {
3967         switch (method) {
3968         case WPS_NOT_READY:
3969                 return "not-ready";
3970         case WPS_PIN_DISPLAY:
3971                 return "Display";
3972         case WPS_PIN_KEYPAD:
3973                 return "Keypad";
3974         case WPS_PBC:
3975                 return "PBC";
3976         case WPS_NFC:
3977                 return "NFC";
3978         case WPS_P2PS:
3979                 return "P2PS";
3980         }
3981
3982         return "??";
3983 }
3984
3985
3986 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3987 {
3988         switch (go_state) {
3989         case UNKNOWN_GO:
3990                 return "unknown";
3991         case LOCAL_GO:
3992                 return "local";
3993         case  REMOTE_GO:
3994                 return "remote";
3995         }
3996
3997         return "??";
3998 }
3999
4000
4001 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4002                                                const u8 *addr, int next)
4003 {
4004         struct p2p_device *dev;
4005
4006         if (addr)
4007                 dev = p2p_get_device(p2p, addr);
4008         else
4009                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4010
4011         if (dev && next) {
4012                 dev = dl_list_first(&dev->list, struct p2p_device, list);
4013                 if (&dev->list == &p2p->devices)
4014                         dev = NULL;
4015         }
4016
4017         if (dev == NULL)
4018                 return NULL;
4019
4020         return &dev->info;
4021 }
4022
4023
4024 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4025                           char *buf, size_t buflen)
4026 {
4027         struct p2p_device *dev;
4028         int res;
4029         char *pos, *end;
4030         struct os_reltime now;
4031
4032         if (info == NULL)
4033                 return -1;
4034
4035         dev = (struct p2p_device *) (((u8 *) info) -
4036                                      offsetof(struct p2p_device, info));
4037
4038         pos = buf;
4039         end = buf + buflen;
4040
4041         os_get_reltime(&now);
4042         res = os_snprintf(pos, end - pos,
4043                           "age=%d\n"
4044                           "listen_freq=%d\n"
4045                           "wps_method=%s\n"
4046                           "interface_addr=" MACSTR "\n"
4047                           "member_in_go_dev=" MACSTR "\n"
4048                           "member_in_go_iface=" MACSTR "\n"
4049                           "go_neg_req_sent=%d\n"
4050                           "go_state=%s\n"
4051                           "dialog_token=%u\n"
4052                           "intended_addr=" MACSTR "\n"
4053                           "country=%c%c\n"
4054                           "oper_freq=%d\n"
4055                           "req_config_methods=0x%x\n"
4056                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4057                           "status=%d\n"
4058                           "invitation_reqs=%u\n",
4059                           (int) (now.sec - dev->last_seen.sec),
4060                           dev->listen_freq,
4061                           p2p_wps_method_text(dev->wps_method),
4062                           MAC2STR(dev->interface_addr),
4063                           MAC2STR(dev->member_in_go_dev),
4064                           MAC2STR(dev->member_in_go_iface),
4065                           dev->go_neg_req_sent,
4066                           p2p_go_state_text(dev->go_state),
4067                           dev->dialog_token,
4068                           MAC2STR(dev->intended_addr),
4069                           dev->country[0] ? dev->country[0] : '_',
4070                           dev->country[1] ? dev->country[1] : '_',
4071                           dev->oper_freq,
4072                           dev->req_config_methods,
4073                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4074                           "[PROBE_REQ_ONLY]" : "",
4075                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4076                           dev->flags & P2P_DEV_NOT_YET_READY ?
4077                           "[NOT_YET_READY]" : "",
4078                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4079                           "[PD_PEER_DISPLAY]" : "",
4080                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4081                           "[PD_PEER_KEYPAD]" : "",
4082                           dev->flags & P2P_DEV_USER_REJECTED ?
4083                           "[USER_REJECTED]" : "",
4084                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4085                           "[PEER_WAITING_RESPONSE]" : "",
4086                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4087                           "[PREFER_PERSISTENT_GROUP]" : "",
4088                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4089                           "[WAIT_GO_NEG_RESPONSE]" : "",
4090                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4091                           "[WAIT_GO_NEG_CONFIRM]" : "",
4092                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4093                           "[GROUP_CLIENT_ONLY]" : "",
4094                           dev->flags & P2P_DEV_FORCE_FREQ ?
4095                           "[FORCE_FREQ]" : "",
4096                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
4097                           "[PD_FOR_JOIN]" : "",
4098                           dev->status,
4099                           dev->invitation_reqs);
4100         if (os_snprintf_error(end - pos, res))
4101                 return pos - buf;
4102         pos += res;
4103
4104         if (dev->ext_listen_period) {
4105                 res = os_snprintf(pos, end - pos,
4106                                   "ext_listen_period=%u\n"
4107                                   "ext_listen_interval=%u\n",
4108                                   dev->ext_listen_period,
4109                                   dev->ext_listen_interval);
4110                 if (os_snprintf_error(end - pos, res))
4111                         return pos - buf;
4112                 pos += res;
4113         }
4114
4115         if (dev->oper_ssid_len) {
4116                 res = os_snprintf(pos, end - pos,
4117                                   "oper_ssid=%s\n",
4118                                   wpa_ssid_txt(dev->oper_ssid,
4119                                                dev->oper_ssid_len));
4120                 if (os_snprintf_error(end - pos, res))
4121                         return pos - buf;
4122                 pos += res;
4123         }
4124
4125 #ifdef CONFIG_WIFI_DISPLAY
4126         if (dev->info.wfd_subelems) {
4127                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4128                 if (os_snprintf_error(end - pos, res))
4129                         return pos - buf;
4130                 pos += res;
4131
4132                 pos += wpa_snprintf_hex(pos, end - pos,
4133                                         wpabuf_head(dev->info.wfd_subelems),
4134                                         wpabuf_len(dev->info.wfd_subelems));
4135
4136                 res = os_snprintf(pos, end - pos, "\n");
4137                 if (os_snprintf_error(end - pos, res))
4138                         return pos - buf;
4139                 pos += res;
4140         }
4141 #endif /* CONFIG_WIFI_DISPLAY */
4142
4143         return pos - buf;
4144 }
4145
4146
4147 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4148 {
4149         return p2p_get_device(p2p, addr) != NULL;
4150 }
4151
4152
4153 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4154 {
4155         if (enabled) {
4156                 p2p_dbg(p2p, "Client discoverability enabled");
4157                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4158         } else {
4159                 p2p_dbg(p2p, "Client discoverability disabled");
4160                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4161         }
4162 }
4163
4164
4165 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4166                                               u32 duration2, u32 interval2)
4167 {
4168         struct wpabuf *req;
4169         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4170         u8 *len;
4171
4172         req = wpabuf_alloc(100);
4173         if (req == NULL)
4174                 return NULL;
4175
4176         if (duration1 || interval1) {
4177                 os_memset(&desc1, 0, sizeof(desc1));
4178                 desc1.count_type = 1;
4179                 desc1.duration = duration1;
4180                 desc1.interval = interval1;
4181                 ptr1 = &desc1;
4182
4183                 if (duration2 || interval2) {
4184                         os_memset(&desc2, 0, sizeof(desc2));
4185                         desc2.count_type = 2;
4186                         desc2.duration = duration2;
4187                         desc2.interval = interval2;
4188                         ptr2 = &desc2;
4189                 }
4190         }
4191
4192         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4193         len = p2p_buf_add_ie_hdr(req);
4194         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4195         p2p_buf_update_ie_hdr(req, len);
4196
4197         return req;
4198 }
4199
4200
4201 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4202                      const u8 *own_interface_addr, unsigned int freq,
4203                      u32 duration1, u32 interval1, u32 duration2,
4204                      u32 interval2)
4205 {
4206         struct wpabuf *req;
4207
4208         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4209                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4210                 "dur2=%u int2=%u",
4211                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4212                 freq, duration1, interval1, duration2, interval2);
4213
4214         req = p2p_build_presence_req(duration1, interval1, duration2,
4215                                      interval2);
4216         if (req == NULL)
4217                 return -1;
4218
4219         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4220         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4221                             go_interface_addr,
4222                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4223                 p2p_dbg(p2p, "Failed to send Action frame");
4224         }
4225         wpabuf_free(req);
4226
4227         return 0;
4228 }
4229
4230
4231 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4232                                                size_t noa_len, u8 dialog_token)
4233 {
4234         struct wpabuf *resp;
4235         u8 *len;
4236
4237         resp = wpabuf_alloc(100 + noa_len);
4238         if (resp == NULL)
4239                 return NULL;
4240
4241         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4242         len = p2p_buf_add_ie_hdr(resp);
4243         p2p_buf_add_status(resp, status);
4244         if (noa) {
4245                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4246                 wpabuf_put_le16(resp, noa_len);
4247                 wpabuf_put_data(resp, noa, noa_len);
4248         } else
4249                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4250         p2p_buf_update_ie_hdr(resp, len);
4251
4252         return resp;
4253 }
4254
4255
4256 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4257                                      const u8 *sa, const u8 *data, size_t len,
4258                                      int rx_freq)
4259 {
4260         struct p2p_message msg;
4261         u8 status;
4262         struct wpabuf *resp;
4263         size_t g;
4264         struct p2p_group *group = NULL;
4265         int parsed = 0;
4266         u8 noa[50];
4267         int noa_len;
4268
4269         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4270
4271         for (g = 0; g < p2p->num_groups; g++) {
4272                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4273                               ETH_ALEN) == 0) {
4274                         group = p2p->groups[g];
4275                         break;
4276                 }
4277         }
4278         if (group == NULL) {
4279                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4280                         MACSTR, MAC2STR(da));
4281                 return;
4282         }
4283
4284         if (p2p_parse(data, len, &msg) < 0) {
4285                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4286                 status = P2P_SC_FAIL_INVALID_PARAMS;
4287                 goto fail;
4288         }
4289         parsed = 1;
4290
4291         if (msg.noa == NULL) {
4292                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4293                 status = P2P_SC_FAIL_INVALID_PARAMS;
4294                 goto fail;
4295         }
4296
4297         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4298
4299 fail:
4300         if (p2p->cfg->get_noa)
4301                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4302                                             sizeof(noa));
4303         else
4304                 noa_len = -1;
4305         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4306                                        noa_len > 0 ? noa_len : 0,
4307                                        msg.dialog_token);
4308         if (parsed)
4309                 p2p_parse_free(&msg);
4310         if (resp == NULL)
4311                 return;
4312
4313         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4314         if (p2p_send_action(p2p, rx_freq, sa, da, da,
4315                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4316                 p2p_dbg(p2p, "Failed to send Action frame");
4317         }
4318         wpabuf_free(resp);
4319 }
4320
4321
4322 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4323                                       const u8 *sa, const u8 *data, size_t len)
4324 {
4325         struct p2p_message msg;
4326
4327         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4328
4329         if (p2p_parse(data, len, &msg) < 0) {
4330                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4331                 return;
4332         }
4333
4334         if (msg.status == NULL || msg.noa == NULL) {
4335                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4336                 p2p_parse_free(&msg);
4337                 return;
4338         }
4339
4340         if (p2p->cfg->presence_resp) {
4341                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4342                                         msg.noa, msg.noa_len);
4343         }
4344
4345         if (*msg.status) {
4346                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4347                         *msg.status);
4348                 p2p_parse_free(&msg);
4349                 return;
4350         }
4351
4352         p2p_dbg(p2p, "P2P Presence Request was accepted");
4353         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4354                     msg.noa, msg.noa_len);
4355         /* TODO: process NoA */
4356         p2p_parse_free(&msg);
4357 }
4358
4359
4360 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4361 {
4362         struct p2p_data *p2p = eloop_ctx;
4363
4364         if (p2p->ext_listen_interval) {
4365                 /* Schedule next extended listen timeout */
4366                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4367                                        p2p->ext_listen_interval_usec,
4368                                        p2p_ext_listen_timeout, p2p, NULL);
4369         }
4370
4371         if ((p2p->cfg->is_p2p_in_progress &&
4372              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4373             (p2p->pending_action_state == P2P_PENDING_PD &&
4374              p2p->pd_retries > 0)) {
4375                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4376                         p2p_state_txt(p2p->state));
4377                 return;
4378         }
4379
4380         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4381                 /*
4382                  * This should not really happen, but it looks like the Listen
4383                  * command may fail is something else (e.g., a scan) was
4384                  * running at an inconvenient time. As a workaround, allow new
4385                  * Extended Listen operation to be started.
4386                  */
4387                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4388                 p2p->ext_listen_only = 0;
4389                 p2p_set_state(p2p, P2P_IDLE);
4390         }
4391
4392         if (p2p->state != P2P_IDLE) {
4393                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4394                 return;
4395         }
4396
4397         p2p_dbg(p2p, "Extended Listen timeout");
4398         p2p->ext_listen_only = 1;
4399         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4400                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4401                 p2p->ext_listen_only = 0;
4402         }
4403 }
4404
4405
4406 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4407                    unsigned int interval)
4408 {
4409         if (period > 65535 || interval > 65535 || period > interval ||
4410             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4411                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4412                         period, interval);
4413                 return -1;
4414         }
4415
4416         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4417
4418         if (interval == 0) {
4419                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4420                 p2p->ext_listen_period = 0;
4421                 p2p->ext_listen_interval = 0;
4422                 return 0;
4423         }
4424
4425         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4426                 period, interval);
4427         p2p->ext_listen_period = period;
4428         p2p->ext_listen_interval = interval;
4429         p2p->ext_listen_interval_sec = interval / 1000;
4430         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4431
4432         eloop_register_timeout(p2p->ext_listen_interval_sec,
4433                                p2p->ext_listen_interval_usec,
4434                                p2p_ext_listen_timeout, p2p, NULL);
4435
4436         return 0;
4437 }
4438
4439
4440 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4441                       const u8 *ie, size_t ie_len)
4442 {
4443         struct p2p_message msg;
4444
4445         if (bssid == NULL || ie == NULL)
4446                 return;
4447
4448         os_memset(&msg, 0, sizeof(msg));
4449         if (p2p_parse_ies(ie, ie_len, &msg))
4450                 return;
4451         if (msg.minor_reason_code == NULL) {
4452                 p2p_parse_free(&msg);
4453                 return;
4454         }
4455
4456         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4457                 " reason_code=%u minor_reason_code=%u",
4458                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4459
4460         p2p_parse_free(&msg);
4461 }
4462
4463
4464 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4465                         const u8 *ie, size_t ie_len)
4466 {
4467         struct p2p_message msg;
4468
4469         if (bssid == NULL || ie == NULL)
4470                 return;
4471
4472         os_memset(&msg, 0, sizeof(msg));
4473         if (p2p_parse_ies(ie, ie_len, &msg))
4474                 return;
4475         if (msg.minor_reason_code == NULL) {
4476                 p2p_parse_free(&msg);
4477                 return;
4478         }
4479
4480         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4481                 " reason_code=%u minor_reason_code=%u",
4482                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4483
4484         p2p_parse_free(&msg);
4485 }
4486
4487
4488 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4489 {
4490         if (enabled) {
4491                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4492                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4493         } else {
4494                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4495                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4496         }
4497 }
4498
4499
4500 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4501                                  u8 *op_channel)
4502 {
4503         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4504 }
4505
4506
4507 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4508                            u8 forced)
4509 {
4510         if (p2p_channel_to_freq(reg_class, channel) < 0)
4511                 return -1;
4512
4513         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4514                 reg_class, channel);
4515
4516         /*
4517          * Listen channel was set in configuration or set by control interface;
4518          * cannot override it.
4519          */
4520         if (p2p->cfg->channel_forced && forced == 0)
4521                 return -1;
4522
4523         if (p2p->state == P2P_IDLE) {
4524                 p2p->cfg->reg_class = reg_class;
4525                 p2p->cfg->channel = channel;
4526                 p2p->cfg->channel_forced = forced;
4527         } else {
4528                 p2p_dbg(p2p, "Defer setting listen channel");
4529                 p2p->pending_reg_class = reg_class;
4530                 p2p->pending_channel = channel;
4531                 p2p->pending_channel_forced = forced;
4532         }
4533
4534         return 0;
4535 }
4536
4537
4538 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4539 {
4540         return p2p->cfg->channel;
4541 }
4542
4543
4544 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4545 {
4546         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4547         if (postfix == NULL) {
4548                 p2p->cfg->ssid_postfix_len = 0;
4549                 return 0;
4550         }
4551         if (len > sizeof(p2p->cfg->ssid_postfix))
4552                 return -1;
4553         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4554         p2p->cfg->ssid_postfix_len = len;
4555         return 0;
4556 }
4557
4558
4559 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4560                          int cfg_op_channel)
4561 {
4562         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4563                 return -1;
4564
4565         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4566                 op_reg_class, op_channel);
4567         p2p->cfg->op_reg_class = op_reg_class;
4568         p2p->cfg->op_channel = op_channel;
4569         p2p->cfg->cfg_op_channel = cfg_op_channel;
4570         return 0;
4571 }
4572
4573
4574 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4575                       const struct p2p_channel *pref_chan)
4576 {
4577         struct p2p_channel *n;
4578
4579         if (pref_chan) {
4580                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4581                 if (n == NULL)
4582                         return -1;
4583                 os_memcpy(n, pref_chan,
4584                           num_pref_chan * sizeof(struct p2p_channel));
4585         } else
4586                 n = NULL;
4587
4588         os_free(p2p->cfg->pref_chan);
4589         p2p->cfg->pref_chan = n;
4590         p2p->cfg->num_pref_chan = num_pref_chan;
4591
4592         return 0;
4593 }
4594
4595
4596 int p2p_set_no_go_freq(struct p2p_data *p2p,
4597                        const struct wpa_freq_range_list *list)
4598 {
4599         struct wpa_freq_range *tmp;
4600
4601         if (list == NULL || list->num == 0) {
4602                 os_free(p2p->no_go_freq.range);
4603                 p2p->no_go_freq.range = NULL;
4604                 p2p->no_go_freq.num = 0;
4605                 return 0;
4606         }
4607
4608         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4609         if (tmp == NULL)
4610                 return -1;
4611         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4612         os_free(p2p->no_go_freq.range);
4613         p2p->no_go_freq.range = tmp;
4614         p2p->no_go_freq.num = list->num;
4615         p2p_dbg(p2p, "Updated no GO chan list");
4616
4617         return 0;
4618 }
4619
4620
4621 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4622                            u8 *iface_addr)
4623 {
4624         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4625         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4626                 return -1;
4627         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4628         return 0;
4629 }
4630
4631
4632 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4633                            u8 *dev_addr)
4634 {
4635         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4636         if (dev == NULL)
4637                 return -1;
4638         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4639         return 0;
4640 }
4641
4642
4643 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4644 {
4645         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4646         if (is_zero_ether_addr(p2p->peer_filter))
4647                 p2p_dbg(p2p, "Disable peer filter");
4648         else
4649                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4650                         MAC2STR(p2p->peer_filter));
4651 }
4652
4653
4654 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4655 {
4656         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4657         if (p2p->cross_connect == enabled)
4658                 return;
4659         p2p->cross_connect = enabled;
4660         /* TODO: may need to tear down any action group where we are GO(?) */
4661 }
4662
4663
4664 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4665 {
4666         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4667         if (dev == NULL)
4668                 return -1;
4669         if (dev->oper_freq <= 0)
4670                 return -1;
4671         return dev->oper_freq;
4672 }
4673
4674
4675 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4676 {
4677         p2p_dbg(p2p, "Intra BSS distribution %s",
4678                 enabled ? "enabled" : "disabled");
4679         p2p->cfg->p2p_intra_bss = enabled;
4680 }
4681
4682
4683 void p2p_update_channel_list(struct p2p_data *p2p,
4684                              const struct p2p_channels *chan,
4685                              const struct p2p_channels *cli_chan)
4686 {
4687         p2p_dbg(p2p, "Update channel list");
4688         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4689         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4690         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4691                   sizeof(struct p2p_channels));
4692         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4693 }
4694
4695
4696 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4697                     const u8 *src, const u8 *bssid, const u8 *buf,
4698                     size_t len, unsigned int wait_time)
4699 {
4700         if (p2p->p2p_scan_running) {
4701                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4702                 if (p2p->after_scan_tx) {
4703                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4704                         os_free(p2p->after_scan_tx);
4705                 }
4706                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4707                                                len);
4708                 if (p2p->after_scan_tx == NULL)
4709                         return -1;
4710                 p2p->after_scan_tx->freq = freq;
4711                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4712                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4713                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4714                 p2p->after_scan_tx->len = len;
4715                 p2p->after_scan_tx->wait_time = wait_time;
4716                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4717                 return 0;
4718         }
4719
4720         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4721                                      buf, len, wait_time);
4722 }
4723
4724
4725 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4726                            int freq_overall)
4727 {
4728         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4729                 freq_24, freq_5, freq_overall);
4730         p2p->best_freq_24 = freq_24;
4731         p2p->best_freq_5 = freq_5;
4732         p2p->best_freq_overall = freq_overall;
4733 }
4734
4735
4736 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4737 {
4738         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4739         p2p->own_freq_preference = freq;
4740 }
4741
4742
4743 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4744 {
4745         if (p2p == NULL || p2p->go_neg_peer == NULL)
4746                 return NULL;
4747         return p2p->go_neg_peer->info.p2p_device_addr;
4748 }
4749
4750
4751 const struct p2p_peer_info *
4752 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4753 {
4754         struct p2p_device *dev;
4755
4756         if (addr) {
4757                 dev = p2p_get_device(p2p, addr);
4758                 if (!dev)
4759                         return NULL;
4760
4761                 if (!next) {
4762                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4763                                 return NULL;
4764
4765                         return &dev->info;
4766                 } else {
4767                         do {
4768                                 dev = dl_list_first(&dev->list,
4769                                                     struct p2p_device,
4770                                                     list);
4771                                 if (!dev || &dev->list == &p2p->devices)
4772                                         return NULL;
4773                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4774                 }
4775         } else {
4776                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4777                 if (!dev)
4778                         return NULL;
4779                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4780                         dev = dl_list_first(&dev->list,
4781                                             struct p2p_device,
4782                                             list);
4783                         if (!dev || &dev->list == &p2p->devices)
4784                                 return NULL;
4785                 }
4786         }
4787
4788         return &dev->info;
4789 }
4790
4791
4792 int p2p_in_progress(struct p2p_data *p2p)
4793 {
4794         if (p2p == NULL)
4795                 return 0;
4796         if (p2p->state == P2P_SEARCH)
4797                 return 2;
4798         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4799 }
4800
4801
4802 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4803                             u8 client_timeout)
4804 {
4805         if (p2p) {
4806                 p2p->go_timeout = go_timeout;
4807                 p2p->client_timeout = client_timeout;
4808         }
4809 }
4810
4811
4812 #ifdef CONFIG_WIFI_DISPLAY
4813
4814 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4815 {
4816         size_t g;
4817         struct p2p_group *group;
4818
4819         for (g = 0; g < p2p->num_groups; g++) {
4820                 group = p2p->groups[g];
4821                 p2p_group_force_beacon_update_ies(group);
4822         }
4823 }
4824
4825
4826 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4827 {
4828         wpabuf_free(p2p->wfd_ie_beacon);
4829         p2p->wfd_ie_beacon = ie;
4830         p2p_update_wfd_ie_groups(p2p);
4831         return 0;
4832 }
4833
4834
4835 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4836 {
4837         wpabuf_free(p2p->wfd_ie_probe_req);
4838         p2p->wfd_ie_probe_req = ie;
4839         return 0;
4840 }
4841
4842
4843 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4844 {
4845         wpabuf_free(p2p->wfd_ie_probe_resp);
4846         p2p->wfd_ie_probe_resp = ie;
4847         p2p_update_wfd_ie_groups(p2p);
4848         return 0;
4849 }
4850
4851
4852 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4853 {
4854         wpabuf_free(p2p->wfd_ie_assoc_req);
4855         p2p->wfd_ie_assoc_req = ie;
4856         return 0;
4857 }
4858
4859
4860 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4861 {
4862         wpabuf_free(p2p->wfd_ie_invitation);
4863         p2p->wfd_ie_invitation = ie;
4864         return 0;
4865 }
4866
4867
4868 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4869 {
4870         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4871         p2p->wfd_ie_prov_disc_req = ie;
4872         return 0;
4873 }
4874
4875
4876 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4877 {
4878         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4879         p2p->wfd_ie_prov_disc_resp = ie;
4880         return 0;
4881 }
4882
4883
4884 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4885 {
4886         wpabuf_free(p2p->wfd_ie_go_neg);
4887         p2p->wfd_ie_go_neg = ie;
4888         return 0;
4889 }
4890
4891
4892 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4893 {
4894         wpabuf_free(p2p->wfd_dev_info);
4895         if (elem) {
4896                 p2p->wfd_dev_info = wpabuf_dup(elem);
4897                 if (p2p->wfd_dev_info == NULL)
4898                         return -1;
4899         } else
4900                 p2p->wfd_dev_info = NULL;
4901
4902         return 0;
4903 }
4904
4905
4906 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4907 {
4908         wpabuf_free(p2p->wfd_assoc_bssid);
4909         if (elem) {
4910                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4911                 if (p2p->wfd_assoc_bssid == NULL)
4912                         return -1;
4913         } else
4914                 p2p->wfd_assoc_bssid = NULL;
4915
4916         return 0;
4917 }
4918
4919
4920 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4921                                   const struct wpabuf *elem)
4922 {
4923         wpabuf_free(p2p->wfd_coupled_sink_info);
4924         if (elem) {
4925                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4926                 if (p2p->wfd_coupled_sink_info == NULL)
4927                         return -1;
4928         } else
4929                 p2p->wfd_coupled_sink_info = NULL;
4930
4931         return 0;
4932 }
4933
4934 #endif /* CONFIG_WIFI_DISPLAY */
4935
4936
4937 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4938                      int max_disc_tu)
4939 {
4940         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4941                 return -1;
4942
4943         p2p->min_disc_int = min_disc_int;
4944         p2p->max_disc_int = max_disc_int;
4945         p2p->max_disc_tu = max_disc_tu;
4946         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4947                 min_disc_int, max_disc_int, max_disc_tu);
4948
4949         return 0;
4950 }
4951
4952
4953 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4954 {
4955         va_list ap;
4956         char buf[500];
4957
4958         if (!p2p->cfg->debug_print)
4959                 return;
4960
4961         va_start(ap, fmt);
4962         vsnprintf(buf, sizeof(buf), fmt, ap);
4963         buf[sizeof(buf) - 1] = '\0';
4964         va_end(ap);
4965         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4966 }
4967
4968
4969 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4970 {
4971         va_list ap;
4972         char buf[500];
4973
4974         if (!p2p->cfg->debug_print)
4975                 return;
4976
4977         va_start(ap, fmt);
4978         vsnprintf(buf, sizeof(buf), fmt, ap);
4979         buf[sizeof(buf) - 1] = '\0';
4980         va_end(ap);
4981         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4982 }
4983
4984
4985 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4986 {
4987         va_list ap;
4988         char buf[500];
4989
4990         if (!p2p->cfg->debug_print)
4991                 return;
4992
4993         va_start(ap, fmt);
4994         vsnprintf(buf, sizeof(buf), fmt, ap);
4995         buf[sizeof(buf) - 1] = '\0';
4996         va_end(ap);
4997         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4998 }
4999
5000
5001 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5002                              void (*peer_callback)(struct p2p_peer_info *peer,
5003                                                    void *user_data),
5004                              void *user_data)
5005 {
5006         struct p2p_device *dev, *n;
5007
5008         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5009                 peer_callback(&dev->info, user_data);
5010         }
5011 }
5012
5013
5014 #ifdef CONFIG_WPS_NFC
5015
5016 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5017                                               int client_freq,
5018                                               const u8 *go_dev_addr,
5019                                               const u8 *ssid, size_t ssid_len)
5020 {
5021         struct wpabuf *buf;
5022         u8 op_class, channel;
5023         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5024
5025         buf = wpabuf_alloc(1000);
5026         if (buf == NULL)
5027                 return NULL;
5028
5029         op_class = p2p->cfg->reg_class;
5030         channel = p2p->cfg->channel;
5031
5032         p2p_buf_add_capability(buf, p2p->dev_capab &
5033                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5034         p2p_buf_add_device_info(buf, p2p, NULL);
5035
5036         if (p2p->num_groups > 0) {
5037                 int freq = p2p_group_get_freq(p2p->groups[0]);
5038                 role = P2P_GO_IN_A_GROUP;
5039                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5040                         p2p_dbg(p2p,
5041                                 "Unknown GO operating frequency %d MHz for NFC handover",
5042                                 freq);
5043                         wpabuf_free(buf);
5044                         return NULL;
5045                 }
5046         } else if (client_freq > 0) {
5047                 role = P2P_CLIENT_IN_A_GROUP;
5048                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5049                         p2p_dbg(p2p,
5050                                 "Unknown client operating frequency %d MHz for NFC handover",
5051                                 client_freq);
5052                         wpabuf_free(buf);
5053                         return NULL;
5054                 }
5055         }
5056
5057         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5058                                        channel, role);
5059
5060         if (p2p->num_groups > 0) {
5061                 /* Limit number of clients to avoid very long message */
5062                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5063                 p2p_group_buf_add_id(p2p->groups[0], buf);
5064         } else if (client_freq > 0 &&
5065                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5066                    ssid && ssid_len > 0) {
5067                 /*
5068                  * Add the optional P2P Group ID to indicate in which group this
5069                  * device is a P2P Client.
5070                  */
5071                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5072         }
5073
5074         return buf;
5075 }
5076
5077
5078 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5079                                            int client_freq,
5080                                            const u8 *go_dev_addr,
5081                                            const u8 *ssid, size_t ssid_len)
5082 {
5083         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5084                                       ssid_len);
5085 }
5086
5087
5088 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5089                                            int client_freq,
5090                                            const u8 *go_dev_addr,
5091                                            const u8 *ssid, size_t ssid_len)
5092 {
5093         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5094                                       ssid_len);
5095 }
5096
5097
5098 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5099                                         struct p2p_nfc_params *params)
5100 {
5101         struct p2p_message msg;
5102         struct p2p_device *dev;
5103         const u8 *p2p_dev_addr;
5104         int freq;
5105         enum p2p_role_indication role;
5106
5107         params->next_step = NO_ACTION;
5108
5109         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5110                                    params->p2p_attr, params->p2p_len, &msg)) {
5111                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5112                 p2p_parse_free(&msg);
5113                 return -1;
5114         }
5115
5116         if (msg.p2p_device_addr)
5117                 p2p_dev_addr = msg.p2p_device_addr;
5118         else if (msg.device_id)
5119                 p2p_dev_addr = msg.device_id;
5120         else {
5121                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5122                 p2p_parse_free(&msg);
5123                 return -1;
5124         }
5125
5126         if (msg.oob_dev_password) {
5127                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5128                           msg.oob_dev_password_len);
5129                 params->oob_dev_pw_len = msg.oob_dev_password_len;
5130         }
5131
5132         dev = p2p_create_device(p2p, p2p_dev_addr);
5133         if (dev == NULL) {
5134                 p2p_parse_free(&msg);
5135                 return -1;
5136         }
5137
5138         params->peer = &dev->info;
5139
5140         os_get_reltime(&dev->last_seen);
5141         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5142         p2p_copy_wps_info(p2p, dev, 0, &msg);
5143
5144         if (!msg.oob_go_neg_channel) {
5145                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5146                 return -1;
5147         }
5148
5149         if (msg.oob_go_neg_channel[3] == 0 &&
5150             msg.oob_go_neg_channel[4] == 0)
5151                 freq = 0;
5152         else
5153                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5154                                            msg.oob_go_neg_channel[4]);
5155         if (freq < 0) {
5156                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5157                 return -1;
5158         }
5159         role = msg.oob_go_neg_channel[5];
5160
5161         if (role == P2P_GO_IN_A_GROUP) {
5162                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5163                 params->go_freq = freq;
5164         } else if (role == P2P_CLIENT_IN_A_GROUP) {
5165                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5166                         freq);
5167                 params->go_freq = freq;
5168         } else
5169                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5170         dev->oob_go_neg_freq = freq;
5171
5172         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5173                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5174                                            p2p->cfg->channel);
5175                 if (freq < 0) {
5176                         p2p_dbg(p2p, "Own listen channel not known");
5177                         return -1;
5178                 }
5179                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5180                 dev->oob_go_neg_freq = freq;
5181         }
5182
5183         if (msg.group_id) {
5184                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5185                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5186                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5187                           params->go_ssid_len);
5188         }
5189
5190         if (dev->flags & P2P_DEV_USER_REJECTED) {
5191                 p2p_dbg(p2p, "Do not report rejected device");
5192                 p2p_parse_free(&msg);
5193                 return 0;
5194         }
5195
5196         if (!(dev->flags & P2P_DEV_REPORTED)) {
5197                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5198                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
5199                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5200         }
5201         p2p_parse_free(&msg);
5202
5203         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5204                 params->next_step = BOTH_GO;
5205         else if (role == P2P_GO_IN_A_GROUP)
5206                 params->next_step = JOIN_GROUP;
5207         else if (role == P2P_CLIENT_IN_A_GROUP) {
5208                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5209                 params->next_step = PEER_CLIENT;
5210         } else if (p2p->num_groups > 0)
5211                 params->next_step = AUTH_JOIN;
5212         else if (params->sel)
5213                 params->next_step = INIT_GO_NEG;
5214         else
5215                 params->next_step = RESP_GO_NEG;
5216
5217         return 0;
5218 }
5219
5220
5221 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5222                                       int go_intent,
5223                                       const u8 *own_interface_addr)
5224 {
5225
5226         p2p->authorized_oob_dev_pw_id = dev_pw_id;
5227         if (dev_pw_id == 0) {
5228                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5229                 return;
5230         }
5231
5232         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5233                 dev_pw_id);
5234
5235         p2p->go_intent = go_intent;
5236         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5237 }
5238
5239 #endif /* CONFIG_WPS_NFC */
5240
5241
5242 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5243 {
5244         if (len < 8 || len > 63)
5245                 return -1;
5246         p2p->cfg->passphrase_len = len;
5247         return 0;
5248 }
5249
5250
5251 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5252 {
5253         p2p->vendor_elem = vendor_elem;
5254 }
5255
5256
5257 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5258 {
5259         struct p2p_data *p2p = eloop_ctx;
5260
5261         p2p_dbg(p2p,
5262                 "Timeout on waiting peer to become ready for GO Negotiation");
5263         p2p_go_neg_failed(p2p, -1);
5264 }