src/p2p/p2p.c

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