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 "wps/wps_i.h"
  16 #include "p2p_i.h"
  17 #include "p2p.h"
  18
  19
  20 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  21 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  22 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  23                                      const u8 *sa, const u8 *data, size_t len,
  24                                      int rx_freq);
  25 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  26                                       const u8 *sa, const u8 *data,
  27                                       size_t len);
  28 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  29 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  30
  31
  32 /*
  33  * p2p_scan recovery timeout
  34  *
  35  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  36  * timeout for this to avoid hitting P2P timeout unnecessarily.
  37  */
  38 #define P2P_SCAN_TIMEOUT 35
  39
  40 /**
  41  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  42  * entries will be removed
  43  */
  44 #define P2P_PEER_EXPIRATION_AGE 300
  45
  46 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  47
  48 static void p2p_expire_peers(struct p2p_data *p2p)
  49 {
  50         struct p2p_device *dev, *n;
  51         struct os_time now;
  52         size_t i;
  53
  54         os_get_time(&now);
  55         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  56                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  57                         continue;
  58
  59                 if (p2p->cfg->go_connected &&
  60                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  61                                            dev->info.p2p_device_addr)) {
  62                         /*
  63                          * We are connected as a client to a group in which the
  64                          * peer is the GO, so do not expire the peer entry.
  65                          */
  66                         os_get_time(&dev->last_seen);
  67                         continue;
  68                 }
  69
  70                 for (i = 0; i < p2p->num_groups; i++) {
  71                         if (p2p_group_is_client_connected(
  72                                     p2p->groups[i], dev->info.p2p_device_addr))
  73                                 break;
  74                 }
  75                 if (i < p2p->num_groups) {
  76                         /*
  77                          * The peer is connected as a client in a group where
  78                          * we are the GO, so do not expire the peer entry.
  79                          */
  80                         os_get_time(&dev->last_seen);
  81                         continue;
  82                 }
  83
  84                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  85                         MAC2STR(dev->info.p2p_device_addr));
  86                 dl_list_del(&dev->list);
  87                 p2p_device_free(p2p, dev);
  88         }
  89 }
  90
  91
  92 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
  93 {
  94         struct p2p_data *p2p = eloop_ctx;
  95         p2p_expire_peers(p2p);
  96         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
  97                                p2p_expiration_timeout, p2p, NULL);
  98 }
  99
 100
 101 static const char * p2p_state_txt(int state)
 102 {
 103         switch (state) {
 104         case P2P_IDLE:
 105                 return "IDLE";
 106         case P2P_SEARCH:
 107                 return "SEARCH";
 108         case P2P_CONNECT:
 109                 return "CONNECT";
 110         case P2P_CONNECT_LISTEN:
 111                 return "CONNECT_LISTEN";
 112         case P2P_GO_NEG:
 113                 return "GO_NEG";
 114         case P2P_LISTEN_ONLY:
 115                 return "LISTEN_ONLY";
 116         case P2P_WAIT_PEER_CONNECT:
 117                 return "WAIT_PEER_CONNECT";
 118         case P2P_WAIT_PEER_IDLE:
 119                 return "WAIT_PEER_IDLE";
 120         case P2P_SD_DURING_FIND:
 121                 return "SD_DURING_FIND";
 122         case P2P_PROVISIONING:
 123                 return "PROVISIONING";
 124         case P2P_PD_DURING_FIND:
 125                 return "PD_DURING_FIND";
 126         case P2P_INVITE:
 127                 return "INVITE";
 128         case P2P_INVITE_LISTEN:
 129                 return "INVITE_LISTEN";
 130         case P2P_SEARCH_WHEN_READY:
 131                 return "SEARCH_WHEN_READY";
 132         case P2P_CONTINUE_SEARCH_WHEN_READY:
 133                 return "CONTINUE_SEARCH_WHEN_READY";
 134         default:
 135                 return "?";
 136         }
 137 }
 138
 139
 140 const char * p2p_get_state_txt(struct p2p_data *p2p)
 141 {
 142         return p2p_state_txt(p2p->state);
 143 }
 144
 145
 146 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 147 {
 148         struct p2p_device *dev = NULL;
 149
 150         if (!addr || !p2p)
 151                 return 0;
 152
 153         dev = p2p_get_device(p2p, addr);
 154         if (dev)
 155                 return dev->wps_prov_info;
 156         else
 157                 return 0;
 158 }
 159
 160
 161 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 162 {
 163         struct p2p_device *dev = NULL;
 164
 165         if (!addr || !p2p)
 166                 return;
 167
 168         dev = p2p_get_device(p2p, addr);
 169         if (dev)
 170                 dev->wps_prov_info = 0;
 171 }
 172
 173
 174 void p2p_set_state(struct p2p_data *p2p, int new_state)
 175 {
 176         p2p_dbg(p2p, "State %s -> %s",
 177                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 178         p2p->state = new_state;
 179 }
 180
 181
 182 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 183 {
 184         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 185                 p2p_state_txt(p2p->state), sec, usec);
 186         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 187         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 188 }
 189
 190
 191 void p2p_clear_timeout(struct p2p_data *p2p)
 192 {
 193         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 194         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 195 }
 196
 197
 198 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
 199                        int status)
 200 {
 201         struct p2p_go_neg_results res;
 202         p2p_clear_timeout(p2p);
 203         p2p_set_state(p2p, P2P_IDLE);
 204         if (p2p->go_neg_peer) {
 205                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 206                 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
 207         }
 208         p2p->go_neg_peer = NULL;
 209
 210         os_memset(&res, 0, sizeof(res));
 211         res.status = status;
 212         if (peer) {
 213                 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
 214                           ETH_ALEN);
 215                 os_memcpy(res.peer_interface_addr, peer->intended_addr,
 216                           ETH_ALEN);
 217         }
 218         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 219 }
 220
 221
 222 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 223 {
 224         unsigned int r, tu;
 225         int freq;
 226         struct wpabuf *ies;
 227
 228         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 229                 p2p_state_txt(p2p->state));
 230
 231         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 232         if (freq < 0) {
 233                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 234                 return;
 235         }
 236
 237         os_get_random((u8 *) &r, sizeof(r));
 238         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 239               p2p->min_disc_int) * 100;
 240         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 241                 tu = p2p->max_disc_tu;
 242         if (!dev_disc && tu < 100)
 243                 tu = 100; /* Need to wait in non-device discovery use cases */
 244         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 245                 tu = p2p->cfg->max_listen * 1000 / 1024;
 246
 247         if (tu == 0) {
 248                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 249                 p2p_set_timeout(p2p, 0, 0);
 250                 return;
 251         }
 252
 253         p2p->pending_listen_freq = freq;
 254         p2p->pending_listen_sec = 0;
 255         p2p->pending_listen_usec = 1024 * tu;
 256
 257         ies = p2p_build_probe_resp_ies(p2p);
 258         if (ies == NULL)
 259                 return;
 260
 261         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 262                     ies) < 0) {
 263                 p2p_dbg(p2p, "Failed to start listen mode");
 264                 p2p->pending_listen_freq = 0;
 265         }
 266         wpabuf_free(ies);
 267 }
 268
 269
 270 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 271 {
 272         int freq;
 273         struct wpabuf *ies;
 274
 275         p2p_dbg(p2p, "Going to listen(only) state");
 276
 277         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 278         if (freq < 0) {
 279                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 280                 return -1;
 281         }
 282
 283         p2p->pending_listen_freq = freq;
 284         p2p->pending_listen_sec = timeout / 1000;
 285         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 286
 287         if (p2p->p2p_scan_running) {
 288                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 289                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 290                         return 0;
 291                 }
 292                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 293                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 294                 return 0;
 295         }
 296
 297         ies = p2p_build_probe_resp_ies(p2p);
 298         if (ies == NULL)
 299                 return -1;
 300
 301         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 302                 p2p_dbg(p2p, "Failed to start listen mode");
 303                 p2p->pending_listen_freq = 0;
 304                 wpabuf_free(ies);
 305                 return -1;
 306         }
 307         wpabuf_free(ies);
 308
 309         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 310
 311         return 0;
 312 }
 313
 314
 315 static void p2p_device_clear_reported(struct p2p_data *p2p)
 316 {
 317         struct p2p_device *dev;
 318         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
 319                 dev->flags &= ~P2P_DEV_REPORTED;
 320 }
 321
 322
 323 /**
 324  * p2p_get_device - Fetch a peer entry
 325  * @p2p: P2P module context from p2p_init()
 326  * @addr: P2P Device Address of the peer
 327  * Returns: Pointer to the device entry or %NULL if not found
 328  */
 329 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 330 {
 331         struct p2p_device *dev;
 332         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 333                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 334                         return dev;
 335         }
 336         return NULL;
 337 }
 338
 339
 340 /**
 341  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 342  * @p2p: P2P module context from p2p_init()
 343  * @addr: P2P Interface Address of the peer
 344  * Returns: Pointer to the device entry or %NULL if not found
 345  */
 346 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 347                                              const u8 *addr)
 348 {
 349         struct p2p_device *dev;
 350         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 351                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 352                         return dev;
 353         }
 354         return NULL;
 355 }
 356
 357
 358 /**
 359  * p2p_create_device - Create a peer entry
 360  * @p2p: P2P module context from p2p_init()
 361  * @addr: P2P Device Address of the peer
 362  * Returns: Pointer to the device entry or %NULL on failure
 363  *
 364  * If there is already an entry for the peer, it will be returned instead of
 365  * creating a new one.
 366  */
 367 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 368                                              const u8 *addr)
 369 {
 370         struct p2p_device *dev, *oldest = NULL;
 371         size_t count = 0;
 372
 373         dev = p2p_get_device(p2p, addr);
 374         if (dev)
 375                 return dev;
 376
 377         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 378                 count++;
 379                 if (oldest == NULL ||
 380                     os_time_before(&dev->last_seen, &oldest->last_seen))
 381                         oldest = dev;
 382         }
 383         if (count + 1 > p2p->cfg->max_peers && oldest) {
 384                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 385                 dl_list_del(&oldest->list);
 386                 p2p_device_free(p2p, oldest);
 387         }
 388
 389         dev = os_zalloc(sizeof(*dev));
 390         if (dev == NULL)
 391                 return NULL;
 392         dl_list_add(&p2p->devices, &dev->list);
 393         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 394
 395         return dev;
 396 }
 397
 398
 399 static void p2p_copy_client_info(struct p2p_device *dev,
 400                                  struct p2p_client_info *cli)
 401 {
 402         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 403         dev->info.device_name[cli->dev_name_len] = '\0';
 404         dev->info.dev_capab = cli->dev_capab;
 405         dev->info.config_methods = cli->config_methods;
 406         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 407         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 408         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 409                   dev->info.wps_sec_dev_type_list_len);
 410 }
 411
 412
 413 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 414                                  const u8 *go_interface_addr, int freq,
 415                                  const u8 *gi, size_t gi_len)
 416 {
 417         struct p2p_group_info info;
 418         size_t c;
 419         struct p2p_device *dev;
 420
 421         if (gi == NULL)
 422                 return 0;
 423
 424         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 425                 return -1;
 426
 427         /*
 428          * Clear old data for this group; if the devices are still in the
 429          * group, the information will be restored in the loop following this.
 430          */
 431         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 432                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 433                               ETH_ALEN) == 0) {
 434                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 435                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 436                 }
 437         }
 438
 439         for (c = 0; c < info.num_clients; c++) {
 440                 struct p2p_client_info *cli = &info.client[c];
 441                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 442                               ETH_ALEN) == 0)
 443                         continue; /* ignore our own entry */
 444                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 445                 if (dev) {
 446                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 447                                           P2P_DEV_PROBE_REQ_ONLY)) {
 448                                 /*
 449                                  * Update information since we have not
 450                                  * received this directly from the client.
 451                                  */
 452                                 p2p_copy_client_info(dev, cli);
 453                         } else {
 454                                 /*
 455                                  * Need to update P2P Client Discoverability
 456                                  * flag since it is valid only in P2P Group
 457                                  * Info attribute.
 458                                  */
 459                                 dev->info.dev_capab &=
 460                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 461                                 dev->info.dev_capab |=
 462                                         cli->dev_capab &
 463                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 464                         }
 465                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 466                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 467                         }
 468                 } else {
 469                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 470                         if (dev == NULL)
 471                                 continue;
 472                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 473                         p2p_copy_client_info(dev, cli);
 474                         dev->oper_freq = freq;
 475                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 476                                             dev->info.p2p_device_addr,
 477                                             &dev->info, 1);
 478                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 479                 }
 480
 481                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 482                           ETH_ALEN);
 483                 os_get_time(&dev->last_seen);
 484                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 485                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 486                           ETH_ALEN);
 487         }
 488
 489         return 0;
 490 }
 491
 492
 493 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 494                               int probe_req, const struct p2p_message *msg)
 495 {
 496         os_memcpy(dev->info.device_name, msg->device_name,
 497                   sizeof(dev->info.device_name));
 498
 499         if (msg->manufacturer &&
 500             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 501                 os_memset(dev->info.manufacturer, 0,
 502                           sizeof(dev->info.manufacturer));
 503                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 504                           msg->manufacturer_len);
 505         }
 506
 507         if (msg->model_name &&
 508             msg->model_name_len < sizeof(dev->info.model_name)) {
 509                 os_memset(dev->info.model_name, 0,
 510                           sizeof(dev->info.model_name));
 511                 os_memcpy(dev->info.model_name, msg->model_name,
 512                           msg->model_name_len);
 513         }
 514
 515         if (msg->model_number &&
 516             msg->model_number_len < sizeof(dev->info.model_number)) {
 517                 os_memset(dev->info.model_number, 0,
 518                           sizeof(dev->info.model_number));
 519                 os_memcpy(dev->info.model_number, msg->model_number,
 520                           msg->model_number_len);
 521         }
 522
 523         if (msg->serial_number &&
 524             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 525                 os_memset(dev->info.serial_number, 0,
 526                           sizeof(dev->info.serial_number));
 527                 os_memcpy(dev->info.serial_number, msg->serial_number,
 528                           msg->serial_number_len);
 529         }
 530
 531         if (msg->pri_dev_type)
 532                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 533                           sizeof(dev->info.pri_dev_type));
 534         else if (msg->wps_pri_dev_type)
 535                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 536                           sizeof(dev->info.pri_dev_type));
 537
 538         if (msg->wps_sec_dev_type_list) {
 539                 os_memcpy(dev->info.wps_sec_dev_type_list,
 540                           msg->wps_sec_dev_type_list,
 541                           msg->wps_sec_dev_type_list_len);
 542                 dev->info.wps_sec_dev_type_list_len =
 543                         msg->wps_sec_dev_type_list_len;
 544         }
 545
 546         if (msg->capability) {
 547                 /*
 548                  * P2P Client Discoverability bit is reserved in all frames
 549                  * that use this function, so do not change its value here.
 550                  */
 551                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 552                 dev->info.dev_capab |= msg->capability[0] &
 553                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 554                 dev->info.group_capab = msg->capability[1];
 555         }
 556
 557         if (msg->ext_listen_timing) {
 558                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 559                 dev->ext_listen_interval =
 560                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 561         }
 562
 563         if (!probe_req) {
 564                 u16 new_config_methods;
 565                 new_config_methods = msg->config_methods ?
 566                         msg->config_methods : msg->wps_config_methods;
 567                 if (new_config_methods &&
 568                     dev->info.config_methods != new_config_methods) {
 569                         p2p_dbg(p2p, "Update peer " MACSTR
 570                                 " config_methods 0x%x -> 0x%x",
 571                                 MAC2STR(dev->info.p2p_device_addr),
 572                                 dev->info.config_methods,
 573                                 new_config_methods);
 574                         dev->info.config_methods = new_config_methods;
 575                 }
 576         }
 577 }
 578
 579
 580 /**
 581  * p2p_add_device - Add peer entries based on scan results or P2P frames
 582  * @p2p: P2P module context from p2p_init()
 583  * @addr: Source address of Beacon or Probe Response frame (may be either
 584  *      P2P Device Address or P2P Interface Address)
 585  * @level: Signal level (signal strength of the received frame from the peer)
 586  * @freq: Frequency on which the Beacon or Probe Response frame was received
 587  * @rx_time: Time when the result was received
 588  * @ies: IEs from the Beacon or Probe Response frame
 589  * @ies_len: Length of ies buffer in octets
 590  * @scan_res: Whether this was based on scan results
 591  * Returns: 0 on success, -1 on failure
 592  *
 593  * If the scan result is for a GO, the clients in the group will also be added
 594  * to the peer table. This function can also be used with some other frames
 595  * like Provision Discovery Request that contains P2P Capability and P2P Device
 596  * Info attributes.
 597  */
 598 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 599                    struct os_time *rx_time, int level, const u8 *ies,
 600                    size_t ies_len, int scan_res)
 601 {
 602         struct p2p_device *dev;
 603         struct p2p_message msg;
 604         const u8 *p2p_dev_addr;
 605         int i;
 606         struct os_time time_now;
 607
 608         os_memset(&msg, 0, sizeof(msg));
 609         if (p2p_parse_ies(ies, ies_len, &msg)) {
 610                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 611                 p2p_parse_free(&msg);
 612                 return -1;
 613         }
 614
 615         if (msg.p2p_device_addr)
 616                 p2p_dev_addr = msg.p2p_device_addr;
 617         else if (msg.device_id)
 618                 p2p_dev_addr = msg.device_id;
 619         else {
 620                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 621                 p2p_parse_free(&msg);
 622                 return -1;
 623         }
 624
 625         if (!is_zero_ether_addr(p2p->peer_filter) &&
 626             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 627                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 628                         " due to peer filter", MAC2STR(p2p_dev_addr));
 629                 p2p_parse_free(&msg);
 630                 return 0;
 631         }
 632
 633         dev = p2p_create_device(p2p, p2p_dev_addr);
 634         if (dev == NULL) {
 635                 p2p_parse_free(&msg);
 636                 return -1;
 637         }
 638
 639         if (rx_time == NULL) {
 640                 os_get_time(&time_now);
 641                 rx_time = &time_now;
 642         }
 643
 644         /*
 645          * Update the device entry only if the new peer
 646          * entry is newer than the one previously stored.
 647          */
 648         if (dev->last_seen.sec > 0 &&
 649             os_time_before(rx_time, &dev->last_seen)) {
 650                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 651                         (unsigned int) rx_time->sec,
 652                         (unsigned int) rx_time->usec,
 653                         (unsigned int) dev->last_seen.sec,
 654                         (unsigned int) dev->last_seen.usec);
 655                 p2p_parse_free(&msg);
 656                 return -1;
 657         }
 658
 659         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_time));
 660
 661         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 662
 663         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 664                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 665         if (msg.ssid &&
 666             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 667              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 668              != 0)) {
 669                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 670                 dev->oper_ssid_len = msg.ssid[1];
 671         }
 672
 673         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 674             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 675                 int ds_freq;
 676                 if (*msg.ds_params == 14)
 677                         ds_freq = 2484;
 678                 else
 679                         ds_freq = 2407 + *msg.ds_params * 5;
 680                 if (freq != ds_freq) {
 681                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 682                                 freq, ds_freq);
 683                         freq = ds_freq;
 684                 }
 685         }
 686
 687         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 688                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 689                         MACSTR " %d -> %d MHz (DS param %d)",
 690                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 691                         freq, msg.ds_params ? *msg.ds_params : -1);
 692         }
 693         if (scan_res) {
 694                 dev->listen_freq = freq;
 695                 if (msg.group_info)
 696                         dev->oper_freq = freq;
 697         }
 698         dev->info.level = level;
 699
 700         p2p_copy_wps_info(p2p, dev, 0, &msg);
 701
 702         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 703                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 704                 dev->info.wps_vendor_ext[i] = NULL;
 705         }
 706
 707         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 708                 if (msg.wps_vendor_ext[i] == NULL)
 709                         break;
 710                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 711                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 712                 if (dev->info.wps_vendor_ext[i] == NULL)
 713                         break;
 714         }
 715
 716         if (msg.wfd_subelems) {
 717                 wpabuf_free(dev->info.wfd_subelems);
 718                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 719         }
 720
 721         if (scan_res) {
 722                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 723                                       msg.group_info, msg.group_info_len);
 724         }
 725
 726         p2p_parse_free(&msg);
 727
 728         if (p2p_pending_sd_req(p2p, dev))
 729                 dev->flags |= P2P_DEV_SD_SCHEDULE;
 730
 731         if (dev->flags & P2P_DEV_REPORTED)
 732                 return 0;
 733
 734         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 735                 freq, (unsigned int) rx_time->sec,
 736                 (unsigned int) rx_time->usec);
 737         if (dev->flags & P2P_DEV_USER_REJECTED) {
 738                 p2p_dbg(p2p, "Do not report rejected device");
 739                 return 0;
 740         }
 741
 742         if (dev->info.config_methods == 0 &&
 743             (freq == 2412 || freq == 2437 || freq == 2462)) {
 744                 /*
 745                  * If we have only seen a Beacon frame from a GO, we do not yet
 746                  * know what WPS config methods it supports. Since some
 747                  * applications use config_methods value from P2P-DEVICE-FOUND
 748                  * events, postpone reporting this peer until we've fully
 749                  * discovered its capabilities.
 750                  *
 751                  * At least for now, do this only if the peer was detected on
 752                  * one of the social channels since that peer can be easily be
 753                  * found again and there are no limitations of having to use
 754                  * passive scan on this channels, so this can be done through
 755                  * Probe Response frame that includes the config_methods
 756                  * information.
 757                  */
 758                 p2p_dbg(p2p, "Do not report peer " MACSTR
 759                         " with unknown config methods", MAC2STR(addr));
 760                 return 0;
 761         }
 762
 763         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 764                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 765         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 766
 767         return 0;
 768 }
 769
 770
 771 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 772 {
 773         int i;
 774
 775         if (p2p->go_neg_peer == dev) {
 776                 /*
 777                  * If GO Negotiation is in progress, report that it has failed.
 778                  */
 779                 p2p_go_neg_failed(p2p, dev, -1);
 780                 p2p->go_neg_peer = NULL;
 781         }
 782         if (p2p->invite_peer == dev)
 783                 p2p->invite_peer = NULL;
 784         if (p2p->sd_peer == dev)
 785                 p2p->sd_peer = NULL;
 786         if (p2p->pending_client_disc_go == dev)
 787                 p2p->pending_client_disc_go = NULL;
 788
 789         /* dev_lost() device, but only if it was previously dev_found() */
 790         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 791                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 792                                    dev->info.p2p_device_addr);
 793
 794         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 795                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 796                 dev->info.wps_vendor_ext[i] = NULL;
 797         }
 798
 799         wpabuf_free(dev->info.wfd_subelems);
 800
 801         os_free(dev);
 802 }
 803
 804
 805 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 806 {
 807         struct p2p_channels *c;
 808         struct p2p_reg_class *cla;
 809         size_t cl, ch;
 810         int found = 0;
 811         u8 reg_class;
 812         u8 channel;
 813         int freq;
 814
 815         c = &p2p->cfg->channels;
 816         for (cl = 0; cl < c->reg_classes; cl++) {
 817                 cla = &c->reg_class[cl];
 818                 if (cla->reg_class != p2p->last_prog_scan_class)
 819                         continue;
 820                 for (ch = 0; ch < cla->channels; ch++) {
 821                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 822                                 found = 1;
 823                                 break;
 824                         }
 825                 }
 826                 if (found)
 827                         break;
 828         }
 829
 830         if (!found) {
 831                 /* Start from beginning */
 832                 reg_class = c->reg_class[0].reg_class;
 833                 channel = c->reg_class[0].channel[0];
 834         } else {
 835                 /* Pick the next channel */
 836                 ch++;
 837                 if (ch == cla->channels) {
 838                         cl++;
 839                         if (cl == c->reg_classes)
 840                                 cl = 0;
 841                         ch = 0;
 842                 }
 843                 reg_class = c->reg_class[cl].reg_class;
 844                 channel = c->reg_class[cl].channel[ch];
 845         }
 846
 847         freq = p2p_channel_to_freq(reg_class, channel);
 848         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 849                 reg_class, channel, freq);
 850         p2p->last_prog_scan_class = reg_class;
 851         p2p->last_prog_scan_chan = channel;
 852
 853         if (freq == 2412 || freq == 2437 || freq == 2462)
 854                 return 0; /* No need to add social channels */
 855         return freq;
 856 }
 857
 858
 859 static void p2p_search(struct p2p_data *p2p)
 860 {
 861         int freq = 0;
 862         enum p2p_scan_type type;
 863         u16 pw_id = DEV_PW_DEFAULT;
 864         int res;
 865
 866         if (p2p->drv_in_listen) {
 867                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 868                 return;
 869         }
 870         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 871
 872         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 873             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 874                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 875                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 876         } else {
 877                 type = P2P_SCAN_SOCIAL;
 878                 p2p_dbg(p2p, "Starting search");
 879         }
 880
 881         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
 882                                  p2p->num_req_dev_types, p2p->req_dev_types,
 883                                  p2p->find_dev_id, pw_id);
 884         if (res < 0) {
 885                 p2p_dbg(p2p, "Scan request failed");
 886                 p2p_continue_find(p2p);
 887         } else if (res == 1) {
 888                 p2p_dbg(p2p, "Could not start p2p_scan at this point - will try again after previous scan completes");
 889                 p2p_set_state(p2p, P2P_CONTINUE_SEARCH_WHEN_READY);
 890         } else {
 891                 p2p_dbg(p2p, "Running p2p_scan");
 892                 p2p->p2p_scan_running = 1;
 893                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
 894                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
 895                                        p2p, NULL);
 896         }
 897 }
 898
 899
 900 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
 901 {
 902         struct p2p_data *p2p = eloop_ctx;
 903         p2p_dbg(p2p, "Find timeout -> stop");
 904         p2p_stop_find(p2p);
 905 }
 906
 907
 908 static int p2p_run_after_scan(struct p2p_data *p2p)
 909 {
 910         struct p2p_device *dev;
 911         enum p2p_after_scan op;
 912
 913         if (p2p->after_scan_tx) {
 914                 p2p->after_scan_tx_in_progress = 1;
 915                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
 916                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
 917                                       p2p->after_scan_tx->freq,
 918                                       p2p->after_scan_tx->dst,
 919                                       p2p->after_scan_tx->src,
 920                                       p2p->after_scan_tx->bssid,
 921                                       (u8 *) (p2p->after_scan_tx + 1),
 922                                       p2p->after_scan_tx->len,
 923                                       p2p->after_scan_tx->wait_time);
 924                 os_free(p2p->after_scan_tx);
 925                 p2p->after_scan_tx = NULL;
 926                 return 1;
 927         }
 928
 929         op = p2p->start_after_scan;
 930         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
 931         switch (op) {
 932         case P2P_AFTER_SCAN_NOTHING:
 933                 break;
 934         case P2P_AFTER_SCAN_LISTEN:
 935                 p2p_dbg(p2p, "Start previously requested Listen state");
 936                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
 937                            p2p->pending_listen_usec / 1000);
 938                 return 1;
 939         case P2P_AFTER_SCAN_CONNECT:
 940                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
 941                         MAC2STR(p2p->after_scan_peer));
 942                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
 943                 if (dev == NULL) {
 944                         p2p_dbg(p2p, "Peer not known anymore");
 945                         break;
 946                 }
 947                 p2p_connect_send(p2p, dev);
 948                 return 1;
 949         }
 950
 951         return 0;
 952 }
 953
 954
 955 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 956 {
 957         struct p2p_data *p2p = eloop_ctx;
 958         int running;
 959         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
 960         running = p2p->p2p_scan_running;
 961         /* Make sure we recover from missed scan results callback */
 962         p2p->p2p_scan_running = 0;
 963
 964         if (running)
 965                 p2p_run_after_scan(p2p);
 966 }
 967
 968
 969 static void p2p_free_req_dev_types(struct p2p_data *p2p)
 970 {
 971         p2p->num_req_dev_types = 0;
 972         os_free(p2p->req_dev_types);
 973         p2p->req_dev_types = NULL;
 974 }
 975
 976
 977 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
 978              enum p2p_discovery_type type,
 979              unsigned int num_req_dev_types, const u8 *req_dev_types,
 980              const u8 *dev_id, unsigned int search_delay)
 981 {
 982         int res;
 983
 984         p2p_dbg(p2p, "Starting find (type=%d)", type);
 985         os_get_time(&p2p->find_start);
 986         if (p2p->p2p_scan_running) {
 987                 p2p_dbg(p2p, "p2p_scan is already running");
 988         }
 989
 990         p2p_free_req_dev_types(p2p);
 991         if (req_dev_types && num_req_dev_types) {
 992                 p2p->req_dev_types = os_malloc(num_req_dev_types *
 993                                                WPS_DEV_TYPE_LEN);
 994                 if (p2p->req_dev_types == NULL)
 995                         return -1;
 996                 os_memcpy(p2p->req_dev_types, req_dev_types,
 997                           num_req_dev_types * WPS_DEV_TYPE_LEN);
 998                 p2p->num_req_dev_types = num_req_dev_types;
 999         }
1000
1001         if (dev_id) {
1002                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1003                 p2p->find_dev_id = p2p->find_dev_id_buf;
1004         } else
1005                 p2p->find_dev_id = NULL;
1006
1007         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1008         p2p_clear_timeout(p2p);
1009         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1010         p2p->find_type = type;
1011         p2p_device_clear_reported(p2p);
1012         p2p_set_state(p2p, P2P_SEARCH);
1013         p2p->search_delay = search_delay;
1014         p2p->in_search_delay = 0;
1015         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1016         p2p->last_p2p_find_timeout = timeout;
1017         if (timeout)
1018                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1019                                        p2p, NULL);
1020         switch (type) {
1021         case P2P_FIND_START_WITH_FULL:
1022         case P2P_FIND_PROGRESSIVE:
1023                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1024                                          p2p->num_req_dev_types,
1025                                          p2p->req_dev_types, dev_id,
1026                                          DEV_PW_DEFAULT);
1027                 break;
1028         case P2P_FIND_ONLY_SOCIAL:
1029                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1030                                          p2p->num_req_dev_types,
1031                                          p2p->req_dev_types, dev_id,
1032                                          DEV_PW_DEFAULT);
1033                 break;
1034         default:
1035                 return -1;
1036         }
1037
1038         if (res == 0) {
1039                 p2p_dbg(p2p, "Running p2p_scan");
1040                 p2p->p2p_scan_running = 1;
1041                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1042                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1043                                        p2p, NULL);
1044         } else if (res == 1) {
1045                 p2p_dbg(p2p, "Could not start p2p_scan at this point - will try again after previous scan completes");
1046                 res = 0;
1047                 p2p_set_state(p2p, P2P_SEARCH_WHEN_READY);
1048                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1049         } else {
1050                 p2p_dbg(p2p, "Failed to start p2p_scan");
1051                 p2p_set_state(p2p, P2P_IDLE);
1052                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1053         }
1054
1055         return res;
1056 }
1057
1058
1059 int p2p_other_scan_completed(struct p2p_data *p2p)
1060 {
1061         if (p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) {
1062                 p2p_set_state(p2p, P2P_SEARCH);
1063                 p2p_search(p2p);
1064                 return 1;
1065         }
1066         if (p2p->state != P2P_SEARCH_WHEN_READY)
1067                 return 0;
1068         p2p_dbg(p2p, "Starting pending P2P find now that previous scan was completed");
1069         if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type,
1070                      p2p->num_req_dev_types, p2p->req_dev_types,
1071                      p2p->find_dev_id, p2p->search_delay) < 0) {
1072                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1073                 return 0;
1074         }
1075         return 1;
1076 }
1077
1078
1079 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1080 {
1081         p2p_dbg(p2p, "Stopping find");
1082         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1083         p2p_clear_timeout(p2p);
1084         if (p2p->state == P2P_SEARCH ||
1085             p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY ||
1086             p2p->state == P2P_SEARCH_WHEN_READY)
1087                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1088         p2p_set_state(p2p, P2P_IDLE);
1089         p2p_free_req_dev_types(p2p);
1090         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1091         if (p2p->go_neg_peer)
1092                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1093         p2p->go_neg_peer = NULL;
1094         p2p->sd_peer = NULL;
1095         p2p->invite_peer = NULL;
1096         p2p_stop_listen_for_freq(p2p, freq);
1097 }
1098
1099
1100 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1101 {
1102         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1103                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1104                 return;
1105         }
1106         if (p2p->in_listen) {
1107                 p2p->in_listen = 0;
1108                 p2p_clear_timeout(p2p);
1109         }
1110         if (p2p->drv_in_listen) {
1111                 /*
1112                  * The driver may not deliver callback to p2p_listen_end()
1113                  * when the operation gets canceled, so clear the internal
1114                  * variable that is tracking driver state.
1115                  */
1116                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1117                 p2p->drv_in_listen = 0;
1118         }
1119         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1120 }
1121
1122
1123 void p2p_stop_listen(struct p2p_data *p2p)
1124 {
1125         if (p2p->state != P2P_LISTEN_ONLY) {
1126                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1127                 return;
1128         }
1129
1130         p2p_stop_listen_for_freq(p2p, 0);
1131         p2p_set_state(p2p, P2P_IDLE);
1132 }
1133
1134
1135 void p2p_stop_find(struct p2p_data *p2p)
1136 {
1137         p2p_stop_find_for_freq(p2p, 0);
1138 }
1139
1140
1141 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1142                                     unsigned int force_freq,
1143                                     unsigned int pref_freq)
1144 {
1145         u8 op_class, op_channel;
1146         unsigned int freq = force_freq ? force_freq : pref_freq;
1147
1148         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u",
1149                 force_freq, pref_freq);
1150         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1151                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1152                 return -1;
1153         }
1154
1155         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel)) {
1156                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1157                         freq, op_class, op_channel);
1158                 return -1;
1159         }
1160
1161         p2p->op_reg_class = op_class;
1162         p2p->op_channel = op_channel;
1163
1164         if (force_freq) {
1165                 p2p->channels.reg_classes = 1;
1166                 p2p->channels.reg_class[0].channels = 1;
1167                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1168                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1169         } else {
1170                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1171                           sizeof(struct p2p_channels));
1172         }
1173
1174         return 0;
1175 }
1176
1177
1178 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1179 {
1180         u8 op_class, op_channel;
1181
1182         p2p_dbg(p2p, "Prepare channel best");
1183
1184         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1185             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1186             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1187             == 0) {
1188                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1189                 p2p->op_reg_class = op_class;
1190                 p2p->op_channel = op_channel;
1191         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1192                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1193                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1194                    == 0) {
1195                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1196                 p2p->op_reg_class = op_class;
1197                 p2p->op_channel = op_channel;
1198         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1199                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1200                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1201                                        &op_channel) == 0) {
1202                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1203                 p2p->op_reg_class = op_class;
1204                 p2p->op_channel = op_channel;
1205         } else if (p2p->cfg->num_pref_chan > 0 &&
1206                    p2p_channels_includes(&p2p->cfg->channels,
1207                                          p2p->cfg->pref_chan[0].op_class,
1208                                          p2p->cfg->pref_chan[0].chan)) {
1209                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1210                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1211                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1212         } else {
1213                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1214                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1215                 p2p->op_channel = p2p->cfg->op_channel;
1216         }
1217
1218         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1219                   sizeof(struct p2p_channels));
1220 }
1221
1222
1223 /**
1224  * p2p_prepare_channel - Select operating channel for GO Negotiation
1225  * @p2p: P2P module context from p2p_init()
1226  * @dev: Selected peer device
1227  * @force_freq: Forced frequency in MHz or 0 if not forced
1228  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1229  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1230  *
1231  * This function is used to do initial operating channel selection for GO
1232  * Negotiation prior to having received peer information. The selected channel
1233  * may be further optimized in p2p_reselect_channel() once the peer information
1234  * is available.
1235  */
1236 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1237                         unsigned int force_freq, unsigned int pref_freq)
1238 {
1239         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u",
1240                 force_freq, pref_freq);
1241         if (force_freq || pref_freq) {
1242                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq) < 0)
1243                         return -1;
1244         } else {
1245                 p2p_prepare_channel_best(p2p);
1246         }
1247         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1248                 p2p->op_reg_class, p2p->op_channel,
1249                 force_freq ? " (forced)" : "");
1250
1251         if (force_freq)
1252                 dev->flags |= P2P_DEV_FORCE_FREQ;
1253         else
1254                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1255
1256         return 0;
1257 }
1258
1259
1260 static void p2p_set_dev_persistent(struct p2p_device *dev,
1261                                    int persistent_group)
1262 {
1263         switch (persistent_group) {
1264         case 0:
1265                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1266                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1267                 break;
1268         case 1:
1269                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1270                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1271                 break;
1272         case 2:
1273                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1274                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1275                 break;
1276         }
1277 }
1278
1279
1280 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1281                 enum p2p_wps_method wps_method,
1282                 int go_intent, const u8 *own_interface_addr,
1283                 unsigned int force_freq, int persistent_group,
1284                 const u8 *force_ssid, size_t force_ssid_len,
1285                 int pd_before_go_neg, unsigned int pref_freq)
1286 {
1287         struct p2p_device *dev;
1288
1289         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1290                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1291                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d",
1292                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1293                 wps_method, persistent_group, pd_before_go_neg);
1294
1295         dev = p2p_get_device(p2p, peer_addr);
1296         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1297                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1298                         MAC2STR(peer_addr));
1299                 return -1;
1300         }
1301
1302         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0)
1303                 return -1;
1304
1305         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1306                 if (!(dev->info.dev_capab &
1307                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1308                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1309                                 " that is in a group and is not discoverable",
1310                                 MAC2STR(peer_addr));
1311                         return -1;
1312                 }
1313                 if (dev->oper_freq <= 0) {
1314                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1315                                 " with incomplete information",
1316                                 MAC2STR(peer_addr));
1317                         return -1;
1318                 }
1319
1320                 /*
1321                  * First, try to connect directly. If the peer does not
1322                  * acknowledge frames, assume it is sleeping and use device
1323                  * discoverability via the GO at that point.
1324                  */
1325         }
1326
1327         p2p->ssid_set = 0;
1328         if (force_ssid) {
1329                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1330                                   force_ssid, force_ssid_len);
1331                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1332                 p2p->ssid_len = force_ssid_len;
1333                 p2p->ssid_set = 1;
1334         }
1335
1336         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1337         dev->flags &= ~P2P_DEV_USER_REJECTED;
1338         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1339         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1340         if (pd_before_go_neg)
1341                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1342         else {
1343                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1344                 /*
1345                  * Assign dialog token and tie breaker here to use the same
1346                  * values in each retry within the same GO Negotiation exchange.
1347                  */
1348                 dev->dialog_token++;
1349                 if (dev->dialog_token == 0)
1350                         dev->dialog_token = 1;
1351                 dev->tie_breaker = p2p->next_tie_breaker;
1352                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1353         }
1354         dev->connect_reqs = 0;
1355         dev->go_neg_req_sent = 0;
1356         dev->go_state = UNKNOWN_GO;
1357         p2p_set_dev_persistent(dev, persistent_group);
1358         p2p->go_intent = go_intent;
1359         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1360
1361         if (p2p->state != P2P_IDLE)
1362                 p2p_stop_find(p2p);
1363
1364         if (p2p->after_scan_tx) {
1365                 /*
1366                  * We need to drop the pending frame to avoid issues with the
1367                  * new GO Negotiation, e.g., when the pending frame was from a
1368                  * previous attempt at starting a GO Negotiation.
1369                  */
1370                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1371                 os_free(p2p->after_scan_tx);
1372                 p2p->after_scan_tx = NULL;
1373         }
1374
1375         dev->wps_method = wps_method;
1376         dev->status = P2P_SC_SUCCESS;
1377
1378         if (p2p->p2p_scan_running) {
1379                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1380                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1381                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1382                 return 0;
1383         }
1384         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1385
1386         return p2p_connect_send(p2p, dev);
1387 }
1388
1389
1390 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1391                   enum p2p_wps_method wps_method,
1392                   int go_intent, const u8 *own_interface_addr,
1393                   unsigned int force_freq, int persistent_group,
1394                   const u8 *force_ssid, size_t force_ssid_len,
1395                   unsigned int pref_freq)
1396 {
1397         struct p2p_device *dev;
1398
1399         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1400                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1401                 " wps_method=%d  persistent_group=%d",
1402                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1403                 wps_method, persistent_group);
1404
1405         dev = p2p_get_device(p2p, peer_addr);
1406         if (dev == NULL) {
1407                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1408                         MAC2STR(peer_addr));
1409                 return -1;
1410         }
1411
1412         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0)
1413                 return -1;
1414
1415         p2p->ssid_set = 0;
1416         if (force_ssid) {
1417                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1418                                   force_ssid, force_ssid_len);
1419                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1420                 p2p->ssid_len = force_ssid_len;
1421                 p2p->ssid_set = 1;
1422         }
1423
1424         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1425         dev->flags &= ~P2P_DEV_USER_REJECTED;
1426         dev->go_neg_req_sent = 0;
1427         dev->go_state = UNKNOWN_GO;
1428         p2p_set_dev_persistent(dev, persistent_group);
1429         p2p->go_intent = go_intent;
1430         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1431
1432         dev->wps_method = wps_method;
1433         dev->status = P2P_SC_SUCCESS;
1434
1435         return 0;
1436 }
1437
1438
1439 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1440                       struct p2p_device *dev, struct p2p_message *msg)
1441 {
1442         os_get_time(&dev->last_seen);
1443
1444         p2p_copy_wps_info(p2p, dev, 0, msg);
1445
1446         if (msg->listen_channel) {
1447                 int freq;
1448                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1449                                            msg->listen_channel[4]);
1450                 if (freq < 0) {
1451                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1452                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1453                                 msg->listen_channel[0],
1454                                 msg->listen_channel[1],
1455                                 msg->listen_channel[2],
1456                                 msg->listen_channel[3],
1457                                 msg->listen_channel[4]);
1458                 } else {
1459                         p2p_dbg(p2p, "Update peer " MACSTR
1460                                 " Listen channel: %u -> %u MHz",
1461                                 MAC2STR(dev->info.p2p_device_addr),
1462                                 dev->listen_freq, freq);
1463                         dev->listen_freq = freq;
1464                 }
1465         }
1466
1467         if (msg->wfd_subelems) {
1468                 wpabuf_free(dev->info.wfd_subelems);
1469                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1470         }
1471
1472         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1473                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1474                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1475         } else {
1476                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1477                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1478                         "listen_freq=%d",
1479                         MAC2STR(dev->info.p2p_device_addr),
1480                         dev->info.dev_capab, dev->info.group_capab,
1481                         dev->info.device_name, dev->listen_freq);
1482         }
1483
1484         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1485
1486         if (dev->flags & P2P_DEV_USER_REJECTED) {
1487                 p2p_dbg(p2p, "Do not report rejected device");
1488                 return;
1489         }
1490
1491         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1492                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1493         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1494 }
1495
1496
1497 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1498 {
1499         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1500         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1501         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1502                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1503         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1504 }
1505
1506
1507 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1508 {
1509         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1510         p2p_random(params->passphrase, 8);
1511         return 0;
1512 }
1513
1514
1515 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1516 {
1517         struct p2p_go_neg_results res;
1518         int go = peer->go_state == LOCAL_GO;
1519         struct p2p_channels intersection;
1520         int freqs;
1521         size_t i, j;
1522
1523         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1524                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1525
1526         os_memset(&res, 0, sizeof(res));
1527         res.role_go = go;
1528         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1529         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1530         res.wps_method = peer->wps_method;
1531         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1532                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1533                         res.persistent_group = 2;
1534                 else
1535                         res.persistent_group = 1;
1536         }
1537
1538         if (go) {
1539                 /* Setup AP mode for WPS provisioning */
1540                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1541                                                p2p->op_channel);
1542                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1543                 res.ssid_len = p2p->ssid_len;
1544                 p2p_random(res.passphrase, 8);
1545         } else {
1546                 res.freq = peer->oper_freq;
1547                 if (p2p->ssid_len) {
1548                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1549                         res.ssid_len = p2p->ssid_len;
1550                 }
1551         }
1552
1553         p2p_channels_intersect(&p2p->channels, &peer->channels,
1554                                &intersection);
1555         freqs = 0;
1556         for (i = 0; i < intersection.reg_classes; i++) {
1557                 struct p2p_reg_class *c = &intersection.reg_class[i];
1558                 if (freqs + 1 == P2P_MAX_CHANNELS)
1559                         break;
1560                 for (j = 0; j < c->channels; j++) {
1561                         int freq;
1562                         if (freqs + 1 == P2P_MAX_CHANNELS)
1563                                 break;
1564                         freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1565                         if (freq < 0)
1566                                 continue;
1567                         res.freq_list[freqs++] = freq;
1568                 }
1569         }
1570
1571         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1572
1573         p2p_clear_timeout(p2p);
1574         p2p->ssid_set = 0;
1575         peer->go_neg_req_sent = 0;
1576         peer->wps_method = WPS_NOT_READY;
1577
1578         p2p_set_state(p2p, P2P_PROVISIONING);
1579         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1580 }
1581
1582
1583 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1584                               const u8 *data, size_t len, int rx_freq)
1585 {
1586         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1587         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1588
1589         if (len < 1)
1590                 return;
1591
1592         switch (data[0]) {
1593         case P2P_GO_NEG_REQ:
1594                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1595                 break;
1596         case P2P_GO_NEG_RESP:
1597                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1598                 break;
1599         case P2P_GO_NEG_CONF:
1600                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1601                 break;
1602         case P2P_INVITATION_REQ:
1603                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1604                                            rx_freq);
1605                 break;
1606         case P2P_INVITATION_RESP:
1607                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1608                 break;
1609         case P2P_PROV_DISC_REQ:
1610                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1611                 break;
1612         case P2P_PROV_DISC_RESP:
1613                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1614                 break;
1615         case P2P_DEV_DISC_REQ:
1616                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1617                 break;
1618         case P2P_DEV_DISC_RESP:
1619                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1620                 break;
1621         default:
1622                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1623                         data[0]);
1624                 break;
1625         }
1626 }
1627
1628
1629 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1630                                  const u8 *sa, const u8 *bssid, const u8 *data,
1631                                  size_t len, int freq)
1632 {
1633         if (len < 1)
1634                 return;
1635
1636         switch (data[0]) {
1637         case WLAN_PA_VENDOR_SPECIFIC:
1638                 data++;
1639                 len--;
1640                 if (len < 3)
1641                         return;
1642                 if (WPA_GET_BE24(data) != OUI_WFA)
1643                         return;
1644
1645                 data += 3;
1646                 len -= 3;
1647                 if (len < 1)
1648                         return;
1649
1650                 if (*data != P2P_OUI_TYPE)
1651                         return;
1652
1653                 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq);
1654                 break;
1655         case WLAN_PA_GAS_INITIAL_REQ:
1656                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1657                 break;
1658         case WLAN_PA_GAS_INITIAL_RESP:
1659                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1660                 break;
1661         case WLAN_PA_GAS_COMEBACK_REQ:
1662                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1663                 break;
1664         case WLAN_PA_GAS_COMEBACK_RESP:
1665                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1666                 break;
1667         }
1668 }
1669
1670
1671 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1672                    const u8 *bssid, u8 category,
1673                    const u8 *data, size_t len, int freq)
1674 {
1675         if (category == WLAN_ACTION_PUBLIC) {
1676                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1677                 return;
1678         }
1679
1680         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1681                 return;
1682
1683         if (len < 4)
1684                 return;
1685
1686         if (WPA_GET_BE24(data) != OUI_WFA)
1687                 return;
1688         data += 3;
1689         len -= 3;
1690
1691         if (*data != P2P_OUI_TYPE)
1692                 return;
1693         data++;
1694         len--;
1695
1696         /* P2P action frame */
1697         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1698         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1699
1700         if (len < 1)
1701                 return;
1702         switch (data[0]) {
1703         case P2P_NOA:
1704                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1705                 /* TODO */
1706                 break;
1707         case P2P_PRESENCE_REQ:
1708                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1709                 break;
1710         case P2P_PRESENCE_RESP:
1711                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1712                 break;
1713         case P2P_GO_DISC_REQ:
1714                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1715                 break;
1716         default:
1717                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1718                 break;
1719         }
1720 }
1721
1722
1723 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1724 {
1725         struct p2p_data *p2p = eloop_ctx;
1726         if (p2p->go_neg_peer == NULL)
1727                 return;
1728         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1729         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1730         p2p_connect_send(p2p, p2p->go_neg_peer);
1731 }
1732
1733
1734 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1735 {
1736         struct p2p_data *p2p = eloop_ctx;
1737         if (p2p->invite_peer == NULL)
1738                 return;
1739         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1740         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr);
1741 }
1742
1743
1744 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1745                                        const u8 *ie, size_t ie_len)
1746 {
1747         struct p2p_message msg;
1748         struct p2p_device *dev;
1749
1750         os_memset(&msg, 0, sizeof(msg));
1751         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1752         {
1753                 p2p_parse_free(&msg);
1754                 return; /* not a P2P probe */
1755         }
1756
1757         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1758             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1759             != 0) {
1760                 /* The Probe Request is not part of P2P Device Discovery. It is
1761                  * not known whether the source address of the frame is the P2P
1762                  * Device Address or P2P Interface Address. Do not add a new
1763                  * peer entry based on this frames.
1764                  */
1765                 p2p_parse_free(&msg);
1766                 return;
1767         }
1768
1769         dev = p2p_get_device(p2p, addr);
1770         if (dev) {
1771                 if (dev->country[0] == 0 && msg.listen_channel)
1772                         os_memcpy(dev->country, msg.listen_channel, 3);
1773                 os_get_time(&dev->last_seen);
1774                 p2p_parse_free(&msg);
1775                 return; /* already known */
1776         }
1777
1778         dev = p2p_create_device(p2p, addr);
1779         if (dev == NULL) {
1780                 p2p_parse_free(&msg);
1781                 return;
1782         }
1783
1784         os_get_time(&dev->last_seen);
1785         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1786
1787         if (msg.listen_channel) {
1788                 os_memcpy(dev->country, msg.listen_channel, 3);
1789                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1790                                                        msg.listen_channel[4]);
1791         }
1792
1793         p2p_copy_wps_info(p2p, dev, 1, &msg);
1794
1795         if (msg.wfd_subelems) {
1796                 wpabuf_free(dev->info.wfd_subelems);
1797                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1798         }
1799
1800         p2p_parse_free(&msg);
1801
1802         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1803                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1804                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1805                 dev->info.group_capab, dev->info.device_name,
1806                 dev->listen_freq);
1807 }
1808
1809
1810 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1811                                                 const u8 *addr,
1812                                                 struct p2p_message *msg)
1813 {
1814         struct p2p_device *dev;
1815
1816         dev = p2p_get_device(p2p, addr);
1817         if (dev) {
1818                 os_get_time(&dev->last_seen);
1819                 return dev; /* already known */
1820         }
1821
1822         dev = p2p_create_device(p2p, addr);
1823         if (dev == NULL)
1824                 return NULL;
1825
1826         p2p_add_dev_info(p2p, addr, dev, msg);
1827
1828         return dev;
1829 }
1830
1831
1832 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1833 {
1834         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1835                 return 1;
1836         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1837             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1838             WPA_GET_BE16(&req_dev_type[6]) == 0)
1839                 return 1; /* Category match with wildcard OUI/sub-category */
1840         return 0;
1841 }
1842
1843
1844 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1845                         size_t num_req_dev_type)
1846 {
1847         size_t i;
1848         for (i = 0; i < num_req_dev_type; i++) {
1849                 if (dev_type_match(dev_type, req_dev_type[i]))
1850                         return 1;
1851         }
1852         return 0;
1853 }
1854
1855
1856 /**
1857  * p2p_match_dev_type - Match local device type with requested type
1858  * @p2p: P2P module context from p2p_init()
1859  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1860  * Returns: 1 on match, 0 on mismatch
1861  *
1862  * This function can be used to match the Requested Device Type attribute in
1863  * WPS IE with the local device types for deciding whether to reply to a Probe
1864  * Request frame.
1865  */
1866 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1867 {
1868         struct wps_parse_attr attr;
1869         size_t i;
1870
1871         if (wps_parse_msg(wps, &attr))
1872                 return 1; /* assume no Requested Device Type attributes */
1873
1874         if (attr.num_req_dev_type == 0)
1875                 return 1; /* no Requested Device Type attributes -> match */
1876
1877         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1878                                 attr.num_req_dev_type))
1879                 return 1; /* Own Primary Device Type matches */
1880
1881         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1882                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1883                                         attr.req_dev_type,
1884                                         attr.num_req_dev_type))
1885                 return 1; /* Own Secondary Device Type matches */
1886
1887         /* No matching device type found */
1888         return 0;
1889 }
1890
1891
1892 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1893 {
1894         struct wpabuf *buf;
1895         u8 *len;
1896         int pw_id = -1;
1897         size_t extra = 0;
1898
1899 #ifdef CONFIG_WIFI_DISPLAY
1900         if (p2p->wfd_ie_probe_resp)
1901                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
1902 #endif /* CONFIG_WIFI_DISPLAY */
1903
1904         buf = wpabuf_alloc(1000 + extra);
1905         if (buf == NULL)
1906                 return NULL;
1907
1908         if (p2p->go_neg_peer) {
1909                 /* Advertise immediate availability of WPS credential */
1910                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
1911         }
1912
1913         p2p_build_wps_ie(p2p, buf, pw_id, 1);
1914
1915 #ifdef CONFIG_WIFI_DISPLAY
1916         if (p2p->wfd_ie_probe_resp)
1917                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
1918 #endif /* CONFIG_WIFI_DISPLAY */
1919
1920         /* P2P IE */
1921         len = p2p_buf_add_ie_hdr(buf);
1922         p2p_buf_add_capability(buf, p2p->dev_capab &
1923                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
1924         if (p2p->ext_listen_interval)
1925                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
1926                                               p2p->ext_listen_interval);
1927         p2p_buf_add_device_info(buf, p2p, NULL);
1928         p2p_buf_update_ie_hdr(buf, len);
1929
1930         return buf;
1931 }
1932
1933
1934 static enum p2p_probe_req_status
1935 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
1936                 const u8 *bssid, const u8 *ie, size_t ie_len)
1937 {
1938         struct ieee802_11_elems elems;
1939         struct wpabuf *buf;
1940         struct ieee80211_mgmt *resp;
1941         struct p2p_message msg;
1942         struct wpabuf *ies;
1943
1944         if (!p2p->in_listen || !p2p->drv_in_listen) {
1945                 /* not in Listen state - ignore Probe Request */
1946                 return P2P_PREQ_NOT_LISTEN;
1947         }
1948
1949         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
1950             ParseFailed) {
1951                 /* Ignore invalid Probe Request frames */
1952                 return P2P_PREQ_MALFORMED;
1953         }
1954
1955         if (elems.p2p == NULL) {
1956                 /* not a P2P probe - ignore it */
1957                 return P2P_PREQ_NOT_P2P;
1958         }
1959
1960         if (dst && !is_broadcast_ether_addr(dst) &&
1961             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
1962                 /* Not sent to the broadcast address or our P2P Device Address
1963                  */
1964                 return P2P_PREQ_NOT_PROCESSED;
1965         }
1966
1967         if (bssid && !is_broadcast_ether_addr(bssid)) {
1968                 /* Not sent to the Wildcard BSSID */
1969                 return P2P_PREQ_NOT_PROCESSED;
1970         }
1971
1972         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
1973             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
1974             0) {
1975                 /* not using P2P Wildcard SSID - ignore */
1976                 return P2P_PREQ_NOT_PROCESSED;
1977         }
1978
1979         if (supp_rates_11b_only(&elems)) {
1980                 /* Indicates support for 11b rates only */
1981                 return P2P_PREQ_NOT_P2P;
1982         }
1983
1984         os_memset(&msg, 0, sizeof(msg));
1985         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
1986                 /* Could not parse P2P attributes */
1987                 return P2P_PREQ_NOT_P2P;
1988         }
1989
1990         if (msg.device_id &&
1991             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
1992                 /* Device ID did not match */
1993                 p2p_parse_free(&msg);
1994                 return P2P_PREQ_NOT_PROCESSED;
1995         }
1996
1997         /* Check Requested Device Type match */
1998         if (msg.wps_attributes &&
1999             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2000                 /* No match with Requested Device Type */
2001                 p2p_parse_free(&msg);
2002                 return P2P_PREQ_NOT_PROCESSED;
2003         }
2004         p2p_parse_free(&msg);
2005
2006         if (!p2p->cfg->send_probe_resp) {
2007                 /* Response generated elsewhere */
2008                 return P2P_PREQ_NOT_PROCESSED;
2009         }
2010
2011         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2012
2013         /*
2014          * We do not really have a specific BSS that this frame is advertising,
2015          * so build a frame that has some information in valid format. This is
2016          * really only used for discovery purposes, not to learn exact BSS
2017          * parameters.
2018          */
2019         ies = p2p_build_probe_resp_ies(p2p);
2020         if (ies == NULL)
2021                 return P2P_PREQ_NOT_PROCESSED;
2022
2023         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2024         if (buf == NULL) {
2025                 wpabuf_free(ies);
2026                 return P2P_PREQ_NOT_PROCESSED;
2027         }
2028
2029         resp = NULL;
2030         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2031
2032         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2033                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2034         os_memcpy(resp->da, addr, ETH_ALEN);
2035         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2036         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2037         resp->u.probe_resp.beacon_int = host_to_le16(100);
2038         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2039         resp->u.probe_resp.capab_info =
2040                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2041                              WLAN_CAPABILITY_PRIVACY |
2042                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2043
2044         wpabuf_put_u8(buf, WLAN_EID_SSID);
2045         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2046         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2047
2048         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2049         wpabuf_put_u8(buf, 8);
2050         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2051         wpabuf_put_u8(buf, 90 / 5);
2052         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2053         wpabuf_put_u8(buf, 180 / 5);
2054         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2055         wpabuf_put_u8(buf, 360 / 5);
2056         wpabuf_put_u8(buf, 480 / 5);
2057         wpabuf_put_u8(buf, 540 / 5);
2058
2059         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2060         wpabuf_put_u8(buf, 1);
2061         wpabuf_put_u8(buf, p2p->cfg->channel);
2062
2063         wpabuf_put_buf(buf, ies);
2064         wpabuf_free(ies);
2065
2066         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2067
2068         wpabuf_free(buf);
2069
2070         return P2P_PREQ_NOT_PROCESSED;
2071 }
2072
2073
2074 enum p2p_probe_req_status
2075 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2076                  const u8 *bssid, const u8 *ie, size_t ie_len)
2077 {
2078         enum p2p_probe_req_status res;
2079
2080         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2081
2082         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2083
2084         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2085             p2p->go_neg_peer &&
2086             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2087             == 0 &&
2088             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2089                 /* Received a Probe Request from GO Negotiation peer */
2090                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2091                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2092                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2093                 return P2P_PREQ_PROCESSED;
2094         }
2095
2096         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2097             p2p->invite_peer &&
2098             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2099             == 0) {
2100                 /* Received a Probe Request from Invite peer */
2101                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2102                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2103                 return P2P_PREQ_PROCESSED;
2104         }
2105
2106         return res;
2107 }
2108
2109
2110 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2111                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2112 {
2113         struct wpabuf *tmp;
2114         u8 *lpos;
2115         size_t tmplen;
2116         int res;
2117         u8 group_capab;
2118
2119         if (p2p_ie == NULL)
2120                 return 0; /* WLAN AP is not a P2P manager */
2121
2122         /*
2123          * (Re)Association Request - P2P IE
2124          * P2P Capability attribute (shall be present)
2125          * P2P Interface attribute (present if concurrent device and
2126          *      P2P Management is enabled)
2127          */
2128         tmp = wpabuf_alloc(200);
2129         if (tmp == NULL)
2130                 return -1;
2131
2132         lpos = p2p_buf_add_ie_hdr(tmp);
2133         group_capab = 0;
2134         if (p2p->num_groups > 0) {
2135                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2136                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2137                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2138                     p2p->cross_connect)
2139                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2140         }
2141         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2142         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2143             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2144                 p2p_buf_add_p2p_interface(tmp, p2p);
2145         p2p_buf_update_ie_hdr(tmp, lpos);
2146
2147         tmplen = wpabuf_len(tmp);
2148         if (tmplen > len)
2149                 res = -1;
2150         else {
2151                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2152                 res = tmplen;
2153         }
2154         wpabuf_free(tmp);
2155
2156         return res;
2157 }
2158
2159
2160 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2161                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2162 {
2163         struct wpabuf *tmp;
2164         u8 *lpos;
2165         struct p2p_device *peer;
2166         size_t tmplen;
2167         int res;
2168         size_t extra = 0;
2169
2170         if (!p2p_group)
2171                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2172
2173 #ifdef CONFIG_WIFI_DISPLAY
2174         if (p2p->wfd_ie_assoc_req)
2175                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2176 #endif /* CONFIG_WIFI_DISPLAY */
2177
2178         /*
2179          * (Re)Association Request - P2P IE
2180          * P2P Capability attribute (shall be present)
2181          * Extended Listen Timing (may be present)
2182          * P2P Device Info attribute (shall be present)
2183          */
2184         tmp = wpabuf_alloc(200 + extra);
2185         if (tmp == NULL)
2186                 return -1;
2187
2188 #ifdef CONFIG_WIFI_DISPLAY
2189         if (p2p->wfd_ie_assoc_req)
2190                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2191 #endif /* CONFIG_WIFI_DISPLAY */
2192
2193         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2194
2195         lpos = p2p_buf_add_ie_hdr(tmp);
2196         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2197         if (p2p->ext_listen_interval)
2198                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2199                                               p2p->ext_listen_interval);
2200         p2p_buf_add_device_info(tmp, p2p, peer);
2201         p2p_buf_update_ie_hdr(tmp, lpos);
2202
2203         tmplen = wpabuf_len(tmp);
2204         if (tmplen > len)
2205                 res = -1;
2206         else {
2207                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2208                 res = tmplen;
2209         }
2210         wpabuf_free(tmp);
2211
2212         return res;
2213 }
2214
2215
2216 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2217 {
2218         struct wpabuf *p2p_ie;
2219         int ret;
2220
2221         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2222         if (p2p_ie == NULL)
2223                 return 0;
2224
2225         ret = p2p_attr_text(p2p_ie, buf, end);
2226         wpabuf_free(p2p_ie);
2227         return ret;
2228 }
2229
2230
2231 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2232 {
2233         struct p2p_message msg;
2234
2235         os_memset(&msg, 0, sizeof(msg));
2236         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2237                 return -1;
2238
2239         if (msg.p2p_device_addr) {
2240                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2241                 return 0;
2242         } else if (msg.device_id) {
2243                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2244                 return 0;
2245         }
2246         return -1;
2247 }
2248
2249
2250 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2251 {
2252         struct wpabuf *p2p_ie;
2253         int ret;
2254
2255         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2256                                              P2P_IE_VENDOR_TYPE);
2257         if (p2p_ie == NULL)
2258                 return -1;
2259         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2260         wpabuf_free(p2p_ie);
2261         return ret;
2262 }
2263
2264
2265 static void p2p_clear_go_neg(struct p2p_data *p2p)
2266 {
2267         p2p->go_neg_peer = NULL;
2268         p2p_clear_timeout(p2p);
2269         p2p_set_state(p2p, P2P_IDLE);
2270 }
2271
2272
2273 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2274 {
2275         if (p2p->go_neg_peer == NULL) {
2276                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2277                 return; /* No pending Group Formation */
2278         }
2279
2280         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2281             0) {
2282                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2283                         MACSTR " (GO Negotiation peer " MACSTR ")",
2284                         MAC2STR(mac_addr),
2285                         MAC2STR(p2p->go_neg_peer->intended_addr));
2286                 return; /* Ignore unexpected peer address */
2287         }
2288
2289         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2290                 MAC2STR(mac_addr));
2291
2292         p2p_clear_go_neg(p2p);
2293 }
2294
2295
2296 void p2p_group_formation_failed(struct p2p_data *p2p)
2297 {
2298         if (p2p->go_neg_peer == NULL) {
2299                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2300                 return; /* No pending Group Formation */
2301         }
2302
2303         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2304                 MAC2STR(p2p->go_neg_peer->intended_addr));
2305
2306         p2p_clear_go_neg(p2p);
2307 }
2308
2309
2310 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2311 {
2312         struct p2p_data *p2p;
2313
2314         if (cfg->max_peers < 1)
2315                 return NULL;
2316
2317         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2318         if (p2p == NULL)
2319                 return NULL;
2320         p2p->cfg = (struct p2p_config *) (p2p + 1);
2321         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2322         if (cfg->dev_name)
2323                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2324         if (cfg->manufacturer)
2325                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2326         if (cfg->model_name)
2327                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2328         if (cfg->model_number)
2329                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2330         if (cfg->serial_number)
2331                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2332         if (cfg->pref_chan) {
2333                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2334                                                 sizeof(struct p2p_channel));
2335                 if (p2p->cfg->pref_chan) {
2336                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2337                                   cfg->num_pref_chan *
2338                                   sizeof(struct p2p_channel));
2339                 } else
2340                         p2p->cfg->num_pref_chan = 0;
2341         }
2342
2343         p2p->min_disc_int = 1;
2344         p2p->max_disc_int = 3;
2345         p2p->max_disc_tu = -1;
2346
2347         os_get_random(&p2p->next_tie_breaker, 1);
2348         p2p->next_tie_breaker &= 0x01;
2349         if (cfg->sd_request)
2350                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2351         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2352         if (cfg->concurrent_operations)
2353                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2354         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2355
2356         dl_list_init(&p2p->devices);
2357
2358         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2359                                p2p_expiration_timeout, p2p, NULL);
2360
2361         p2p->go_timeout = 100;
2362         p2p->client_timeout = 20;
2363
2364         return p2p;
2365 }
2366
2367
2368 void p2p_deinit(struct p2p_data *p2p)
2369 {
2370 #ifdef CONFIG_WIFI_DISPLAY
2371         wpabuf_free(p2p->wfd_ie_beacon);
2372         wpabuf_free(p2p->wfd_ie_probe_req);
2373         wpabuf_free(p2p->wfd_ie_probe_resp);
2374         wpabuf_free(p2p->wfd_ie_assoc_req);
2375         wpabuf_free(p2p->wfd_ie_invitation);
2376         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2377         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2378         wpabuf_free(p2p->wfd_ie_go_neg);
2379         wpabuf_free(p2p->wfd_dev_info);
2380         wpabuf_free(p2p->wfd_assoc_bssid);
2381         wpabuf_free(p2p->wfd_coupled_sink_info);
2382 #endif /* CONFIG_WIFI_DISPLAY */
2383
2384         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2385         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2386         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2387         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2388         p2p_flush(p2p);
2389         p2p_free_req_dev_types(p2p);
2390         os_free(p2p->cfg->dev_name);
2391         os_free(p2p->cfg->manufacturer);
2392         os_free(p2p->cfg->model_name);
2393         os_free(p2p->cfg->model_number);
2394         os_free(p2p->cfg->serial_number);
2395         os_free(p2p->cfg->pref_chan);
2396         os_free(p2p->groups);
2397         wpabuf_free(p2p->sd_resp);
2398         os_free(p2p->after_scan_tx);
2399         p2p_remove_wps_vendor_extensions(p2p);
2400         os_free(p2p);
2401 }
2402
2403
2404 void p2p_flush(struct p2p_data *p2p)
2405 {
2406         struct p2p_device *dev, *prev;
2407         p2p_stop_find(p2p);
2408         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2409                               list) {
2410                 dl_list_del(&dev->list);
2411                 p2p_device_free(p2p, dev);
2412         }
2413         p2p_free_sd_queries(p2p);
2414         os_free(p2p->after_scan_tx);
2415         p2p->after_scan_tx = NULL;
2416 }
2417
2418
2419 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2420 {
2421         struct p2p_device *dev;
2422
2423         dev = p2p_get_device(p2p, addr);
2424         if (dev == NULL)
2425                 return -1;
2426
2427         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2428
2429         if (p2p->go_neg_peer == dev)
2430                 p2p->go_neg_peer = NULL;
2431
2432         dev->wps_method = WPS_NOT_READY;
2433         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2434         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2435
2436         /* Check if after_scan_tx is for this peer. If so free it */
2437         if (p2p->after_scan_tx &&
2438             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2439                 os_free(p2p->after_scan_tx);
2440                 p2p->after_scan_tx = NULL;
2441         }
2442
2443         return 0;
2444 }
2445
2446
2447 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2448 {
2449         os_free(p2p->cfg->dev_name);
2450         if (dev_name) {
2451                 p2p->cfg->dev_name = os_strdup(dev_name);
2452                 if (p2p->cfg->dev_name == NULL)
2453                         return -1;
2454         } else
2455                 p2p->cfg->dev_name = NULL;
2456         return 0;
2457 }
2458
2459
2460 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2461 {
2462         os_free(p2p->cfg->manufacturer);
2463         p2p->cfg->manufacturer = NULL;
2464         if (manufacturer) {
2465                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2466                 if (p2p->cfg->manufacturer == NULL)
2467                         return -1;
2468         }
2469
2470         return 0;
2471 }
2472
2473
2474 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2475 {
2476         os_free(p2p->cfg->model_name);
2477         p2p->cfg->model_name = NULL;
2478         if (model_name) {
2479                 p2p->cfg->model_name = os_strdup(model_name);
2480                 if (p2p->cfg->model_name == NULL)
2481                         return -1;
2482         }
2483
2484         return 0;
2485 }
2486
2487
2488 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2489 {
2490         os_free(p2p->cfg->model_number);
2491         p2p->cfg->model_number = NULL;
2492         if (model_number) {
2493                 p2p->cfg->model_number = os_strdup(model_number);
2494                 if (p2p->cfg->model_number == NULL)
2495                         return -1;
2496         }
2497
2498         return 0;
2499 }
2500
2501
2502 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2503 {
2504         os_free(p2p->cfg->serial_number);
2505         p2p->cfg->serial_number = NULL;
2506         if (serial_number) {
2507                 p2p->cfg->serial_number = os_strdup(serial_number);
2508                 if (p2p->cfg->serial_number == NULL)
2509                         return -1;
2510         }
2511
2512         return 0;
2513 }
2514
2515
2516 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2517 {
2518         p2p->cfg->config_methods = config_methods;
2519 }
2520
2521
2522 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2523 {
2524         os_memcpy(p2p->cfg->uuid, uuid, 16);
2525 }
2526
2527
2528 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2529 {
2530         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2531         return 0;
2532 }
2533
2534
2535 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2536                           size_t num_dev_types)
2537 {
2538         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2539                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2540         p2p->cfg->num_sec_dev_types = num_dev_types;
2541         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2542         return 0;
2543 }
2544
2545
2546 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2547 {
2548         int i;
2549
2550         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2551                 wpabuf_free(p2p->wps_vendor_ext[i]);
2552                 p2p->wps_vendor_ext[i] = NULL;
2553         }
2554 }
2555
2556
2557 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2558                                  const struct wpabuf *vendor_ext)
2559 {
2560         int i;
2561
2562         if (vendor_ext == NULL)
2563                 return -1;
2564
2565         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2566                 if (p2p->wps_vendor_ext[i] == NULL)
2567                         break;
2568         }
2569         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2570                 return -1;
2571
2572         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2573         if (p2p->wps_vendor_ext[i] == NULL)
2574                 return -1;
2575
2576         return 0;
2577 }
2578
2579
2580 int p2p_set_country(struct p2p_data *p2p, const char *country)
2581 {
2582         os_memcpy(p2p->cfg->country, country, 3);
2583         return 0;
2584 }
2585
2586
2587 void p2p_continue_find(struct p2p_data *p2p)
2588 {
2589         struct p2p_device *dev;
2590         p2p_set_state(p2p, P2P_SEARCH);
2591         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2592                 if (dev->flags & P2P_DEV_SD_SCHEDULE) {
2593                         if (p2p_start_sd(p2p, dev) == 0)
2594                                 return;
2595                         else
2596                                 break;
2597                 } else if (dev->req_config_methods &&
2598                            !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2599                         p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2600                                 MACSTR " (config methods 0x%x)",
2601                                 MAC2STR(dev->info.p2p_device_addr),
2602                                 dev->req_config_methods);
2603                         if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2604                                 return;
2605                 }
2606         }
2607
2608         p2p_listen_in_find(p2p, 1);
2609 }
2610
2611
2612 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2613 {
2614         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2615                 success);
2616         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2617
2618         if (!success) {
2619                 if (p2p->sd_peer) {
2620                         p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
2621                         p2p->sd_peer = NULL;
2622                 }
2623                 p2p_continue_find(p2p);
2624                 return;
2625         }
2626
2627         if (p2p->sd_peer == NULL) {
2628                 p2p_dbg(p2p, "No SD peer entry known");
2629                 p2p_continue_find(p2p);
2630                 return;
2631         }
2632
2633         /* Wait for response from the peer */
2634         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2635         p2p_set_timeout(p2p, 0, 200000);
2636 }
2637
2638
2639 /**
2640  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2641  * @p2p: P2P module context from p2p_init()
2642  */
2643 static void p2p_retry_pd(struct p2p_data *p2p)
2644 {
2645         struct p2p_device *dev;
2646
2647         if (p2p->state != P2P_IDLE)
2648                 return;
2649
2650         /*
2651          * Retry the prov disc req attempt only for the peer that the user had
2652          * requested.
2653          */
2654
2655         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2656                 if (os_memcmp(p2p->pending_pd_devaddr,
2657                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2658                         continue;
2659                 if (!dev->req_config_methods)
2660                         continue;
2661
2662                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2663                         MACSTR " (config methods 0x%x)",
2664                         MAC2STR(dev->info.p2p_device_addr),
2665                         dev->req_config_methods);
2666                 p2p_send_prov_disc_req(p2p, dev,
2667                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2668                                        p2p->pd_force_freq);
2669                 return;
2670         }
2671 }
2672
2673
2674 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2675 {
2676         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2677                 success);
2678
2679         /*
2680          * Postpone resetting the pending action state till after we actually
2681          * time out. This allows us to take some action like notifying any
2682          * interested parties about no response to the request.
2683          *
2684          * When the timer (below) goes off we check in IDLE, SEARCH, or
2685          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2686          * requests in, if this was still pending and then raise notification.
2687          */
2688
2689         if (!success) {
2690                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2691
2692                 if (p2p->user_initiated_pd &&
2693                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2694                 {
2695                         /* Retry request from timeout to avoid busy loops */
2696                         p2p->pending_action_state = P2P_PENDING_PD;
2697                         p2p_set_timeout(p2p, 0, 50000);
2698                 } else if (p2p->state != P2P_IDLE)
2699                         p2p_continue_find(p2p);
2700                 else if (p2p->user_initiated_pd) {
2701                         p2p->pending_action_state = P2P_PENDING_PD;
2702                         p2p_set_timeout(p2p, 0, 300000);
2703                 }
2704                 return;
2705         }
2706
2707         /*
2708          * This postponing, of resetting pending_action_state, needs to be
2709          * done only for user initiated PD requests and not internal ones.
2710          */
2711         if (p2p->user_initiated_pd)
2712                 p2p->pending_action_state = P2P_PENDING_PD;
2713         else
2714                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2715
2716         /* Wait for response from the peer */
2717         if (p2p->state == P2P_SEARCH)
2718                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2719         p2p_set_timeout(p2p, 0, 200000);
2720 }
2721
2722
2723 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2724                          struct os_time *rx_time, int level, const u8 *ies,
2725                          size_t ies_len)
2726 {
2727         if (os_time_before(rx_time, &p2p->find_start)) {
2728                 /*
2729                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2730                  * scan results for relatively long time. To avoid reporting
2731                  * stale information, update P2P peers only based on results
2732                  * that have based on frames received after the last p2p_find
2733                  * operation was started.
2734                  */
2735                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2736                         " (rx_time=%u.%06u)",
2737                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2738                         (unsigned int) rx_time->usec);
2739                 return 0;
2740         }
2741
2742         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2743
2744         return 0;
2745 }
2746
2747
2748 void p2p_scan_res_handled(struct p2p_data *p2p)
2749 {
2750         if (!p2p->p2p_scan_running) {
2751                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2752         }
2753         p2p->p2p_scan_running = 0;
2754         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2755
2756         if (p2p_run_after_scan(p2p))
2757                 return;
2758         if (p2p->state == P2P_SEARCH)
2759                 p2p_continue_find(p2p);
2760 }
2761
2762
2763 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2764 {
2765         u8 *len;
2766
2767 #ifdef CONFIG_WIFI_DISPLAY
2768         if (p2p->wfd_ie_probe_req)
2769                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2770 #endif /* CONFIG_WIFI_DISPLAY */
2771
2772         len = p2p_buf_add_ie_hdr(ies);
2773         p2p_buf_add_capability(ies, p2p->dev_capab &
2774                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2775         if (dev_id)
2776                 p2p_buf_add_device_id(ies, dev_id);
2777         if (p2p->cfg->reg_class && p2p->cfg->channel)
2778                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2779                                            p2p->cfg->reg_class,
2780                                            p2p->cfg->channel);
2781         if (p2p->ext_listen_interval)
2782                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2783                                               p2p->ext_listen_interval);
2784         /* TODO: p2p_buf_add_operating_channel() if GO */
2785         p2p_buf_update_ie_hdr(ies, len);
2786 }
2787
2788
2789 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2790 {
2791         size_t len = 100;
2792
2793 #ifdef CONFIG_WIFI_DISPLAY
2794         if (p2p && p2p->wfd_ie_probe_req)
2795                 len += wpabuf_len(p2p->wfd_ie_probe_req);
2796 #endif /* CONFIG_WIFI_DISPLAY */
2797
2798         return len;
2799 }
2800
2801
2802 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
2803 {
2804         return p2p_attr_text(p2p_ie, buf, end);
2805 }
2806
2807
2808 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
2809 {
2810         struct p2p_device *dev = p2p->go_neg_peer;
2811         int timeout;
2812
2813         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
2814
2815         if (dev == NULL) {
2816                 p2p_dbg(p2p, "No pending GO Negotiation");
2817                 return;
2818         }
2819
2820         if (success) {
2821                 if (dev->flags & P2P_DEV_USER_REJECTED) {
2822                         p2p_set_state(p2p, P2P_IDLE);
2823                         return;
2824                 }
2825         } else if (dev->go_neg_req_sent) {
2826                 /* Cancel the increment from p2p_connect_send() on failure */
2827                 dev->go_neg_req_sent--;
2828         }
2829
2830         if (!success &&
2831             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2832             !is_zero_ether_addr(dev->member_in_go_dev)) {
2833                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
2834                         MAC2STR(dev->info.p2p_device_addr));
2835                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2836                 p2p_send_dev_disc_req(p2p, dev);
2837                 return;
2838         }
2839
2840         /*
2841          * Use P2P find, if needed, to find the other device from its listen
2842          * channel.
2843          */
2844         p2p_set_state(p2p, P2P_CONNECT);
2845         timeout = success ? 500000 : 100000;
2846         if (!success && p2p->go_neg_peer &&
2847             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
2848                 unsigned int r;
2849                 /*
2850                  * Peer is expected to wait our response and we will skip the
2851                  * listen phase. Add some randomness to the wait time here to
2852                  * make it less likely to hit cases where we could end up in
2853                  * sync with peer not listening.
2854                  */
2855                 os_get_random((u8 *) &r, sizeof(r));
2856                 timeout += r % 100000;
2857         }
2858         p2p_set_timeout(p2p, 0, timeout);
2859 }
2860
2861
2862 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
2863 {
2864         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
2865                 success);
2866         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
2867                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
2868                 return;
2869         }
2870         p2p_set_state(p2p, P2P_CONNECT);
2871         p2p_set_timeout(p2p, 0, 500000);
2872 }
2873
2874
2875 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
2876                                        const u8 *addr)
2877 {
2878         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
2879         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
2880                 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
2881                                   p2p->go_neg_peer->status);
2882         } else if (success) {
2883                 struct p2p_device *dev;
2884                 dev = p2p_get_device(p2p, addr);
2885                 if (dev &&
2886                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
2887                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
2888         }
2889 }
2890
2891
2892 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
2893                                enum p2p_send_action_result result)
2894 {
2895         struct p2p_device *dev;
2896
2897         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
2898         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2899         if (result == P2P_SEND_ACTION_FAILED) {
2900                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
2901                 return;
2902         }
2903         if (result == P2P_SEND_ACTION_NO_ACK) {
2904                 /*
2905                  * It looks like the TX status for GO Negotiation Confirm is
2906                  * often showing failure even when the peer has actually
2907                  * received the frame. Since the peer may change channels
2908                  * immediately after having received the frame, we may not see
2909                  * an Ack for retries, so just dropping a single frame may
2910                  * trigger this. To allow the group formation to succeed if the
2911                  * peer did indeed receive the frame, continue regardless of
2912                  * the TX status.
2913                  */
2914                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
2915         }
2916
2917         dev = p2p->go_neg_peer;
2918         if (dev == NULL)
2919                 return;
2920
2921         p2p_go_complete(p2p, dev);
2922 }
2923
2924
2925 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
2926                         const u8 *src, const u8 *bssid,
2927                         enum p2p_send_action_result result)
2928 {
2929         enum p2p_pending_action_state state;
2930         int success;
2931
2932         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
2933                 " src=" MACSTR " bssid=" MACSTR " result=%d",
2934                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
2935                 MAC2STR(bssid), result);
2936         success = result == P2P_SEND_ACTION_SUCCESS;
2937         state = p2p->pending_action_state;
2938         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2939         switch (state) {
2940         case P2P_NO_PENDING_ACTION:
2941                 if (p2p->after_scan_tx_in_progress) {
2942                         p2p->after_scan_tx_in_progress = 0;
2943                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
2944                             p2p_run_after_scan(p2p))
2945                                 break;
2946                         if (p2p->state == P2P_SEARCH) {
2947                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
2948                                 p2p_continue_find(p2p);
2949                         }
2950                 }
2951                 break;
2952         case P2P_PENDING_GO_NEG_REQUEST:
2953                 p2p_go_neg_req_cb(p2p, success);
2954                 break;
2955         case P2P_PENDING_GO_NEG_RESPONSE:
2956                 p2p_go_neg_resp_cb(p2p, success);
2957                 break;
2958         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
2959                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
2960                 break;
2961         case P2P_PENDING_GO_NEG_CONFIRM:
2962                 p2p_go_neg_conf_cb(p2p, result);
2963                 break;
2964         case P2P_PENDING_SD:
2965                 p2p_sd_cb(p2p, success);
2966                 break;
2967         case P2P_PENDING_PD:
2968                 p2p_prov_disc_cb(p2p, success);
2969                 break;
2970         case P2P_PENDING_INVITATION_REQUEST:
2971                 p2p_invitation_req_cb(p2p, success);
2972                 break;
2973         case P2P_PENDING_INVITATION_RESPONSE:
2974                 p2p_invitation_resp_cb(p2p, success);
2975                 break;
2976         case P2P_PENDING_DEV_DISC_REQUEST:
2977                 p2p_dev_disc_req_cb(p2p, success);
2978                 break;
2979         case P2P_PENDING_DEV_DISC_RESPONSE:
2980                 p2p_dev_disc_resp_cb(p2p, success);
2981                 break;
2982         case P2P_PENDING_GO_DISC_REQ:
2983                 p2p_go_disc_req_cb(p2p, success);
2984                 break;
2985         }
2986
2987         p2p->after_scan_tx_in_progress = 0;
2988 }
2989
2990
2991 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
2992                    unsigned int duration)
2993 {
2994         if (freq == p2p->pending_client_disc_freq) {
2995                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
2996                 p2p->pending_client_disc_freq = 0;
2997                 return;
2998         }
2999
3000         if (freq != p2p->pending_listen_freq) {
3001                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3002                         freq, duration, p2p->pending_listen_freq);
3003                 return;
3004         }
3005
3006         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3007                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3008                 p2p->pending_listen_freq);
3009         p2p->in_listen = 1;
3010         p2p->drv_in_listen = freq;
3011         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3012                 /*
3013                  * Add 20 msec extra wait to avoid race condition with driver
3014                  * remain-on-channel end event, i.e., give driver more time to
3015                  * complete the operation before our timeout expires.
3016                  */
3017                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3018                                 p2p->pending_listen_usec + 20000);
3019         }
3020
3021         p2p->pending_listen_freq = 0;
3022 }
3023
3024
3025 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3026 {
3027         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3028         p2p->drv_in_listen = 0;
3029         if (p2p->in_listen)
3030                 return 0; /* Internal timeout will trigger the next step */
3031
3032         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3033                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3034                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3035                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3036                         return 0;
3037                 }
3038
3039                 p2p_set_state(p2p, P2P_CONNECT);
3040                 p2p_connect_send(p2p, p2p->go_neg_peer);
3041                 return 1;
3042         } else if (p2p->state == P2P_SEARCH) {
3043                 if (p2p->p2p_scan_running) {
3044                          /*
3045                           * Search is already in progress. This can happen if
3046                           * an Action frame RX is reported immediately after
3047                           * the end of a remain-on-channel operation and the
3048                           * response frame to that is sent using an offchannel
3049                           * operation while in p2p_find. Avoid an attempt to
3050                           * restart a scan here.
3051                           */
3052                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3053                         return 1;
3054                 }
3055                 if (p2p->pending_listen_freq) {
3056                         /*
3057                          * Better wait a bit if the driver is unable to start
3058                          * offchannel operation for some reason. p2p_search()
3059                          * will be started from internal timeout.
3060                          */
3061                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3062                         p2p_set_timeout(p2p, 0, 100000);
3063                         return 1;
3064                 }
3065                 if (p2p->search_delay) {
3066                         p2p_dbg(p2p, "Delay search operation by %u ms",
3067                                 p2p->search_delay);
3068                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3069                                         (p2p->search_delay % 1000) * 1000);
3070                         return 1;
3071                 }
3072                 p2p_search(p2p);
3073                 return 1;
3074         }
3075
3076         return 0;
3077 }
3078
3079
3080 static void p2p_timeout_connect(struct p2p_data *p2p)
3081 {
3082         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3083         if (p2p->go_neg_peer &&
3084             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3085                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3086                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3087                 return;
3088         }
3089         if (p2p->go_neg_peer &&
3090             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3091             p2p->go_neg_peer->connect_reqs < 120) {
3092                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3093                 p2p_connect_send(p2p, p2p->go_neg_peer);
3094                 return;
3095         }
3096
3097         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3098         p2p_listen_in_find(p2p, 0);
3099 }
3100
3101
3102 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3103 {
3104         if (p2p->go_neg_peer) {
3105                 if (p2p->drv_in_listen) {
3106                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3107                         return;
3108                 }
3109
3110                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3111                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3112                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3113                         return;
3114                 }
3115
3116                 p2p_set_state(p2p, P2P_CONNECT);
3117                 p2p_connect_send(p2p, p2p->go_neg_peer);
3118         } else
3119                 p2p_set_state(p2p, P2P_IDLE);
3120 }
3121
3122
3123 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3124 {
3125         /*
3126          * TODO: could remain constantly in Listen state for some time if there
3127          * are no other concurrent uses for the radio. For now, go to listen
3128          * state once per second to give other uses a chance to use the radio.
3129          */
3130         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3131         p2p_set_timeout(p2p, 0, 500000);
3132 }
3133
3134
3135 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3136 {
3137         struct p2p_device *dev = p2p->go_neg_peer;
3138
3139         if (dev == NULL) {
3140                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3141                 return;
3142         }
3143
3144         dev->wait_count++;
3145         if (dev->wait_count >= 120) {
3146                 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3147                 p2p_go_neg_failed(p2p, dev, -1);
3148                 return;
3149         }
3150
3151         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3152         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3153         p2p_listen_in_find(p2p, 0);
3154 }
3155
3156
3157 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3158 {
3159         p2p_dbg(p2p, "Service Discovery Query timeout");
3160         if (p2p->sd_peer) {
3161                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3162                 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
3163                 p2p->sd_peer = NULL;
3164         }
3165         p2p_continue_find(p2p);
3166 }
3167
3168
3169 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3170 {
3171         p2p_dbg(p2p, "Provision Discovery Request timeout");
3172         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3173         p2p_continue_find(p2p);
3174 }
3175
3176
3177 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3178 {
3179         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3180
3181         /*
3182          * For user initiated PD requests that we have not gotten any responses
3183          * for while in IDLE state, we retry them a couple of times before
3184          * giving up.
3185          */
3186         if (!p2p->user_initiated_pd)
3187                 return;
3188
3189         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3190
3191         if (p2p->pd_retries) {
3192                 p2p->pd_retries--;
3193                 p2p_retry_pd(p2p);
3194         } else {
3195                 struct p2p_device *dev;
3196                 int for_join = 0;
3197
3198                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3199                         if (os_memcmp(p2p->pending_pd_devaddr,
3200                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3201                                 continue;
3202                         if (dev->req_config_methods &&
3203                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3204                                 for_join = 1;
3205                 }
3206
3207                 if (p2p->cfg->prov_disc_fail)
3208                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3209                                                  p2p->pending_pd_devaddr,
3210                                                  for_join ?
3211                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3212                                                  P2P_PROV_DISC_TIMEOUT);
3213                 p2p_reset_pending_pd(p2p);
3214         }
3215 }
3216
3217
3218 static void p2p_timeout_invite(struct p2p_data *p2p)
3219 {
3220         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3221         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3222         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3223                 /*
3224                  * Better remain on operating channel instead of listen channel
3225                  * when running a group.
3226                  */
3227                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3228                 p2p_set_timeout(p2p, 0, 100000);
3229                 return;
3230         }
3231         p2p_listen_in_find(p2p, 0);
3232 }
3233
3234
3235 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3236 {
3237         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3238                 p2p_set_state(p2p, P2P_INVITE);
3239                 p2p_invite_send(p2p, p2p->invite_peer,
3240                                 p2p->invite_go_dev_addr);
3241         } else {
3242                 if (p2p->invite_peer) {
3243                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3244                         if (p2p->cfg->invitation_result)
3245                                 p2p->cfg->invitation_result(
3246                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3247                                         p2p->invite_peer->info.p2p_device_addr);
3248                 }
3249                 p2p_set_state(p2p, P2P_IDLE);
3250         }
3251 }
3252
3253
3254 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3255 {
3256         struct p2p_data *p2p = eloop_ctx;
3257
3258         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3259
3260         p2p->in_listen = 0;
3261
3262         switch (p2p->state) {
3263         case P2P_IDLE:
3264                 /* Check if we timed out waiting for PD req */
3265                 if (p2p->pending_action_state == P2P_PENDING_PD)
3266                         p2p_timeout_prov_disc_req(p2p);
3267                 break;
3268         case P2P_SEARCH:
3269                 /* Check if we timed out waiting for PD req */
3270                 if (p2p->pending_action_state == P2P_PENDING_PD)
3271                         p2p_timeout_prov_disc_req(p2p);
3272                 if (p2p->search_delay && !p2p->in_search_delay) {
3273                         p2p_dbg(p2p, "Delay search operation by %u ms",
3274                                 p2p->search_delay);
3275                         p2p->in_search_delay = 1;
3276                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3277                                         (p2p->search_delay % 1000) * 1000);
3278                         break;
3279                 }
3280                 p2p->in_search_delay = 0;
3281                 p2p_search(p2p);
3282                 break;
3283         case P2P_CONNECT:
3284                 p2p_timeout_connect(p2p);
3285                 break;
3286         case P2P_CONNECT_LISTEN:
3287                 p2p_timeout_connect_listen(p2p);
3288                 break;
3289         case P2P_GO_NEG:
3290                 break;
3291         case P2P_LISTEN_ONLY:
3292                 /* Check if we timed out waiting for PD req */
3293                 if (p2p->pending_action_state == P2P_PENDING_PD)
3294                         p2p_timeout_prov_disc_req(p2p);
3295
3296                 if (p2p->ext_listen_only) {
3297                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3298                         p2p->ext_listen_only = 0;
3299                         p2p_set_state(p2p, P2P_IDLE);
3300                 }
3301                 break;
3302         case P2P_WAIT_PEER_CONNECT:
3303                 p2p_timeout_wait_peer_connect(p2p);
3304                 break;
3305         case P2P_WAIT_PEER_IDLE:
3306                 p2p_timeout_wait_peer_idle(p2p);
3307                 break;
3308         case P2P_SD_DURING_FIND:
3309                 p2p_timeout_sd_during_find(p2p);
3310                 break;
3311         case P2P_PROVISIONING:
3312                 break;
3313         case P2P_PD_DURING_FIND:
3314                 p2p_timeout_prov_disc_during_find(p2p);
3315                 break;
3316         case P2P_INVITE:
3317                 p2p_timeout_invite(p2p);
3318                 break;
3319         case P2P_INVITE_LISTEN:
3320                 p2p_timeout_invite_listen(p2p);
3321                 break;
3322         case P2P_SEARCH_WHEN_READY:
3323                 break;
3324         case P2P_CONTINUE_SEARCH_WHEN_READY:
3325                 break;
3326         }
3327 }
3328
3329
3330 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3331 {
3332         struct p2p_device *dev;
3333
3334         dev = p2p_get_device(p2p, peer_addr);
3335         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3336                 MACSTR, MAC2STR(peer_addr));
3337         if (dev == NULL) {
3338                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3339                 return -1;
3340         }
3341         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3342         dev->flags |= P2P_DEV_USER_REJECTED;
3343         return 0;
3344 }
3345
3346
3347 const char * p2p_wps_method_text(enum p2p_wps_method method)
3348 {
3349         switch (method) {
3350         case WPS_NOT_READY:
3351                 return "not-ready";
3352         case WPS_PIN_DISPLAY:
3353                 return "Display";
3354         case WPS_PIN_KEYPAD:
3355                 return "Keypad";
3356         case WPS_PBC:
3357                 return "PBC";
3358         }
3359
3360         return "??";
3361 }
3362
3363
3364 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3365 {
3366         switch (go_state) {
3367         case UNKNOWN_GO:
3368                 return "unknown";
3369         case LOCAL_GO:
3370                 return "local";
3371         case  REMOTE_GO:
3372                 return "remote";
3373         }
3374
3375         return "??";
3376 }
3377
3378
3379 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3380                                                const u8 *addr, int next)
3381 {
3382         struct p2p_device *dev;
3383
3384         if (addr)
3385                 dev = p2p_get_device(p2p, addr);
3386         else
3387                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3388
3389         if (dev && next) {
3390                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3391                 if (&dev->list == &p2p->devices)
3392                         dev = NULL;
3393         }
3394
3395         if (dev == NULL)
3396                 return NULL;
3397
3398         return &dev->info;
3399 }
3400
3401
3402 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3403                           char *buf, size_t buflen)
3404 {
3405         struct p2p_device *dev;
3406         int res;
3407         char *pos, *end;
3408         struct os_time now;
3409
3410         if (info == NULL)
3411                 return -1;
3412
3413         dev = (struct p2p_device *) (((u8 *) info) -
3414                                      offsetof(struct p2p_device, info));
3415
3416         pos = buf;
3417         end = buf + buflen;
3418
3419         os_get_time(&now);
3420         res = os_snprintf(pos, end - pos,
3421                           "age=%d\n"
3422                           "listen_freq=%d\n"
3423                           "wps_method=%s\n"
3424                           "interface_addr=" MACSTR "\n"
3425                           "member_in_go_dev=" MACSTR "\n"
3426                           "member_in_go_iface=" MACSTR "\n"
3427                           "go_neg_req_sent=%d\n"
3428                           "go_state=%s\n"
3429                           "dialog_token=%u\n"
3430                           "intended_addr=" MACSTR "\n"
3431                           "country=%c%c\n"
3432                           "oper_freq=%d\n"
3433                           "req_config_methods=0x%x\n"
3434                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3435                           "status=%d\n"
3436                           "wait_count=%u\n"
3437                           "invitation_reqs=%u\n",
3438                           (int) (now.sec - dev->last_seen.sec),
3439                           dev->listen_freq,
3440                           p2p_wps_method_text(dev->wps_method),
3441                           MAC2STR(dev->interface_addr),
3442                           MAC2STR(dev->member_in_go_dev),
3443                           MAC2STR(dev->member_in_go_iface),
3444                           dev->go_neg_req_sent,
3445                           p2p_go_state_text(dev->go_state),
3446                           dev->dialog_token,
3447                           MAC2STR(dev->intended_addr),
3448                           dev->country[0] ? dev->country[0] : '_',
3449                           dev->country[1] ? dev->country[1] : '_',
3450                           dev->oper_freq,
3451                           dev->req_config_methods,
3452                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3453                           "[PROBE_REQ_ONLY]" : "",
3454                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3455                           dev->flags & P2P_DEV_NOT_YET_READY ?
3456                           "[NOT_YET_READY]" : "",
3457                           dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "",
3458                           dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" :
3459                           "",
3460                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3461                           "[PD_PEER_DISPLAY]" : "",
3462                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3463                           "[PD_PEER_KEYPAD]" : "",
3464                           dev->flags & P2P_DEV_USER_REJECTED ?
3465                           "[USER_REJECTED]" : "",
3466                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3467                           "[PEER_WAITING_RESPONSE]" : "",
3468                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3469                           "[PREFER_PERSISTENT_GROUP]" : "",
3470                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3471                           "[WAIT_GO_NEG_RESPONSE]" : "",
3472                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3473                           "[WAIT_GO_NEG_CONFIRM]" : "",
3474                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3475                           "[GROUP_CLIENT_ONLY]" : "",
3476                           dev->flags & P2P_DEV_FORCE_FREQ ?
3477                           "[FORCE_FREQ]" : "",
3478                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3479                           "[PD_FOR_JOIN]" : "",
3480                           dev->status,
3481                           dev->wait_count,
3482                           dev->invitation_reqs);
3483         if (res < 0 || res >= end - pos)
3484                 return pos - buf;
3485         pos += res;
3486
3487         if (dev->ext_listen_period) {
3488                 res = os_snprintf(pos, end - pos,
3489                                   "ext_listen_period=%u\n"
3490                                   "ext_listen_interval=%u\n",
3491                                   dev->ext_listen_period,
3492                                   dev->ext_listen_interval);
3493                 if (res < 0 || res >= end - pos)
3494                         return pos - buf;
3495                 pos += res;
3496         }
3497
3498         if (dev->oper_ssid_len) {
3499                 res = os_snprintf(pos, end - pos,
3500                                   "oper_ssid=%s\n",
3501                                   wpa_ssid_txt(dev->oper_ssid,
3502                                                dev->oper_ssid_len));
3503                 if (res < 0 || res >= end - pos)
3504                         return pos - buf;
3505                 pos += res;
3506         }
3507
3508 #ifdef CONFIG_WIFI_DISPLAY
3509         if (dev->info.wfd_subelems) {
3510                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3511                 if (res < 0 || res >= end - pos)
3512                         return pos - buf;
3513                 pos += res;
3514
3515                 pos += wpa_snprintf_hex(pos, end - pos,
3516                                         wpabuf_head(dev->info.wfd_subelems),
3517                                         wpabuf_len(dev->info.wfd_subelems));
3518
3519                 res = os_snprintf(pos, end - pos, "\n");
3520                 if (res < 0 || res >= end - pos)
3521                         return pos - buf;
3522                 pos += res;
3523         }
3524 #endif /* CONFIG_WIFI_DISPLAY */
3525
3526         return pos - buf;
3527 }
3528
3529
3530 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3531 {
3532         return p2p_get_device(p2p, addr) != NULL;
3533 }
3534
3535
3536 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3537 {
3538         if (enabled) {
3539                 p2p_dbg(p2p, "Client discoverability enabled");
3540                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3541         } else {
3542                 p2p_dbg(p2p, "Client discoverability disabled");
3543                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3544         }
3545 }
3546
3547
3548 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3549                                               u32 duration2, u32 interval2)
3550 {
3551         struct wpabuf *req;
3552         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3553         u8 *len;
3554
3555         req = wpabuf_alloc(100);
3556         if (req == NULL)
3557                 return NULL;
3558
3559         if (duration1 || interval1) {
3560                 os_memset(&desc1, 0, sizeof(desc1));
3561                 desc1.count_type = 1;
3562                 desc1.duration = duration1;
3563                 desc1.interval = interval1;
3564                 ptr1 = &desc1;
3565
3566                 if (duration2 || interval2) {
3567                         os_memset(&desc2, 0, sizeof(desc2));
3568                         desc2.count_type = 2;
3569                         desc2.duration = duration2;
3570                         desc2.interval = interval2;
3571                         ptr2 = &desc2;
3572                 }
3573         }
3574
3575         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3576         len = p2p_buf_add_ie_hdr(req);
3577         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3578         p2p_buf_update_ie_hdr(req, len);
3579
3580         return req;
3581 }
3582
3583
3584 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3585                      const u8 *own_interface_addr, unsigned int freq,
3586                      u32 duration1, u32 interval1, u32 duration2,
3587                      u32 interval2)
3588 {
3589         struct wpabuf *req;
3590
3591         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3592                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3593                 "dur2=%u int2=%u",
3594                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3595                 freq, duration1, interval1, duration2, interval2);
3596
3597         req = p2p_build_presence_req(duration1, interval1, duration2,
3598                                      interval2);
3599         if (req == NULL)
3600                 return -1;
3601
3602         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3603         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3604                             go_interface_addr,
3605                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3606                 p2p_dbg(p2p, "Failed to send Action frame");
3607         }
3608         wpabuf_free(req);
3609
3610         return 0;
3611 }
3612
3613
3614 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3615                                                size_t noa_len, u8 dialog_token)
3616 {
3617         struct wpabuf *resp;
3618         u8 *len;
3619
3620         resp = wpabuf_alloc(100 + noa_len);
3621         if (resp == NULL)
3622                 return NULL;
3623
3624         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3625         len = p2p_buf_add_ie_hdr(resp);
3626         p2p_buf_add_status(resp, status);
3627         if (noa) {
3628                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3629                 wpabuf_put_le16(resp, noa_len);
3630                 wpabuf_put_data(resp, noa, noa_len);
3631         } else
3632                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3633         p2p_buf_update_ie_hdr(resp, len);
3634
3635         return resp;
3636 }
3637
3638
3639 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3640                                      const u8 *sa, const u8 *data, size_t len,
3641                                      int rx_freq)
3642 {
3643         struct p2p_message msg;
3644         u8 status;
3645         struct wpabuf *resp;
3646         size_t g;
3647         struct p2p_group *group = NULL;
3648         int parsed = 0;
3649         u8 noa[50];
3650         int noa_len;
3651
3652         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3653
3654         for (g = 0; g < p2p->num_groups; g++) {
3655                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3656                               ETH_ALEN) == 0) {
3657                         group = p2p->groups[g];
3658                         break;
3659                 }
3660         }
3661         if (group == NULL) {
3662                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3663                         MACSTR, MAC2STR(da));
3664                 return;
3665         }
3666
3667         if (p2p_parse(data, len, &msg) < 0) {
3668                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3669                 status = P2P_SC_FAIL_INVALID_PARAMS;
3670                 goto fail;
3671         }
3672         parsed = 1;
3673
3674         if (msg.noa == NULL) {
3675                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3676                 status = P2P_SC_FAIL_INVALID_PARAMS;
3677                 goto fail;
3678         }
3679
3680         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3681
3682 fail:
3683         if (p2p->cfg->get_noa)
3684                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3685                                             sizeof(noa));
3686         else
3687                 noa_len = -1;
3688         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3689                                        noa_len > 0 ? noa_len : 0,
3690                                        msg.dialog_token);
3691         if (parsed)
3692                 p2p_parse_free(&msg);
3693         if (resp == NULL)
3694                 return;
3695
3696         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3697         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3698                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3699                 p2p_dbg(p2p, "Failed to send Action frame");
3700         }
3701         wpabuf_free(resp);
3702 }
3703
3704
3705 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3706                                       const u8 *sa, const u8 *data, size_t len)
3707 {
3708         struct p2p_message msg;
3709
3710         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3711
3712         if (p2p_parse(data, len, &msg) < 0) {
3713                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3714                 return;
3715         }
3716
3717         if (msg.status == NULL || msg.noa == NULL) {
3718                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3719                 p2p_parse_free(&msg);
3720                 return;
3721         }
3722
3723         if (*msg.status) {
3724                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3725                         *msg.status);
3726                 p2p_parse_free(&msg);
3727                 return;
3728         }
3729
3730         p2p_dbg(p2p, "P2P Presence Request was accepted");
3731         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3732                     msg.noa, msg.noa_len);
3733         /* TODO: process NoA */
3734         p2p_parse_free(&msg);
3735 }
3736
3737
3738 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3739 {
3740         struct p2p_data *p2p = eloop_ctx;
3741
3742         if (p2p->ext_listen_interval) {
3743                 /* Schedule next extended listen timeout */
3744                 eloop_register_timeout(p2p->ext_listen_interval_sec,
3745                                        p2p->ext_listen_interval_usec,
3746                                        p2p_ext_listen_timeout, p2p, NULL);
3747         }
3748
3749         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
3750                 /*
3751                  * This should not really happen, but it looks like the Listen
3752                  * command may fail is something else (e.g., a scan) was
3753                  * running at an inconvenient time. As a workaround, allow new
3754                  * Extended Listen operation to be started.
3755                  */
3756                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
3757                 p2p->ext_listen_only = 0;
3758                 p2p_set_state(p2p, P2P_IDLE);
3759         }
3760
3761         if (p2p->state != P2P_IDLE) {
3762                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
3763                 return;
3764         }
3765
3766         p2p_dbg(p2p, "Extended Listen timeout");
3767         p2p->ext_listen_only = 1;
3768         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
3769                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
3770                 p2p->ext_listen_only = 0;
3771         }
3772 }
3773
3774
3775 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
3776                    unsigned int interval)
3777 {
3778         if (period > 65535 || interval > 65535 || period > interval ||
3779             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
3780                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
3781                         period, interval);
3782                 return -1;
3783         }
3784
3785         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
3786
3787         if (interval == 0) {
3788                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
3789                 p2p->ext_listen_period = 0;
3790                 p2p->ext_listen_interval = 0;
3791                 return 0;
3792         }
3793
3794         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
3795                 period, interval);
3796         p2p->ext_listen_period = period;
3797         p2p->ext_listen_interval = interval;
3798         p2p->ext_listen_interval_sec = interval / 1000;
3799         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
3800
3801         eloop_register_timeout(p2p->ext_listen_interval_sec,
3802                                p2p->ext_listen_interval_usec,
3803                                p2p_ext_listen_timeout, p2p, NULL);
3804
3805         return 0;
3806 }
3807
3808
3809 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3810                       const u8 *ie, size_t ie_len)
3811 {
3812         struct p2p_message msg;
3813
3814         if (bssid == NULL || ie == NULL)
3815                 return;
3816
3817         os_memset(&msg, 0, sizeof(msg));
3818         if (p2p_parse_ies(ie, ie_len, &msg))
3819                 return;
3820         if (msg.minor_reason_code == NULL)
3821                 return;
3822
3823         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
3824                 " reason_code=%u minor_reason_code=%u",
3825                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3826
3827         p2p_parse_free(&msg);
3828 }
3829
3830
3831 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3832                         const u8 *ie, size_t ie_len)
3833 {
3834         struct p2p_message msg;
3835
3836         if (bssid == NULL || ie == NULL)
3837                 return;
3838
3839         os_memset(&msg, 0, sizeof(msg));
3840         if (p2p_parse_ies(ie, ie_len, &msg))
3841                 return;
3842         if (msg.minor_reason_code == NULL)
3843                 return;
3844
3845         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
3846                 " reason_code=%u minor_reason_code=%u",
3847                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3848
3849         p2p_parse_free(&msg);
3850 }
3851
3852
3853 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
3854 {
3855         if (enabled) {
3856                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
3857                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
3858         } else {
3859                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
3860                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
3861         }
3862 }
3863
3864
3865 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
3866 {
3867         if (p2p_channel_to_freq(reg_class, channel) < 0)
3868                 return -1;
3869
3870         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
3871                 reg_class, channel);
3872         p2p->cfg->reg_class = reg_class;
3873         p2p->cfg->channel = channel;
3874
3875         return 0;
3876 }
3877
3878
3879 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
3880 {
3881         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
3882         if (postfix == NULL) {
3883                 p2p->cfg->ssid_postfix_len = 0;
3884                 return 0;
3885         }
3886         if (len > sizeof(p2p->cfg->ssid_postfix))
3887                 return -1;
3888         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
3889         p2p->cfg->ssid_postfix_len = len;
3890         return 0;
3891 }
3892
3893
3894 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
3895                          int cfg_op_channel)
3896 {
3897         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
3898                 return -1;
3899
3900         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
3901                 op_reg_class, op_channel);
3902         p2p->cfg->op_reg_class = op_reg_class;
3903         p2p->cfg->op_channel = op_channel;
3904         p2p->cfg->cfg_op_channel = cfg_op_channel;
3905         return 0;
3906 }
3907
3908
3909 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
3910                       const struct p2p_channel *pref_chan)
3911 {
3912         struct p2p_channel *n;
3913
3914         if (pref_chan) {
3915                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
3916                 if (n == NULL)
3917                         return -1;
3918                 os_memcpy(n, pref_chan,
3919                           num_pref_chan * sizeof(struct p2p_channel));
3920         } else
3921                 n = NULL;
3922
3923         os_free(p2p->cfg->pref_chan);
3924         p2p->cfg->pref_chan = n;
3925         p2p->cfg->num_pref_chan = num_pref_chan;
3926
3927         return 0;
3928 }
3929
3930
3931 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
3932                            u8 *iface_addr)
3933 {
3934         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
3935         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
3936                 return -1;
3937         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
3938         return 0;
3939 }
3940
3941
3942 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
3943                            u8 *dev_addr)
3944 {
3945         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
3946         if (dev == NULL)
3947                 return -1;
3948         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
3949         return 0;
3950 }
3951
3952
3953 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
3954 {
3955         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
3956         if (is_zero_ether_addr(p2p->peer_filter))
3957                 p2p_dbg(p2p, "Disable peer filter");
3958         else
3959                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
3960                         MAC2STR(p2p->peer_filter));
3961 }
3962
3963
3964 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
3965 {
3966         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
3967         if (p2p->cross_connect == enabled)
3968                 return;
3969         p2p->cross_connect = enabled;
3970         /* TODO: may need to tear down any action group where we are GO(?) */
3971 }
3972
3973
3974 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
3975 {
3976         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
3977         if (dev == NULL)
3978                 return -1;
3979         if (dev->oper_freq <= 0)
3980                 return -1;
3981         return dev->oper_freq;
3982 }
3983
3984
3985 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
3986 {
3987         p2p_dbg(p2p, "Intra BSS distribution %s",
3988                 enabled ? "enabled" : "disabled");
3989         p2p->cfg->p2p_intra_bss = enabled;
3990 }
3991
3992
3993 void p2p_update_channel_list(struct p2p_data *p2p, struct p2p_channels *chan)
3994 {
3995         p2p_dbg(p2p, "Update channel list");
3996         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
3997 }
3998
3999
4000 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4001                     const u8 *src, const u8 *bssid, const u8 *buf,
4002                     size_t len, unsigned int wait_time)
4003 {
4004         if (p2p->p2p_scan_running) {
4005                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4006                 if (p2p->after_scan_tx) {
4007                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4008                         os_free(p2p->after_scan_tx);
4009                 }
4010                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4011                                                len);
4012                 if (p2p->after_scan_tx == NULL)
4013                         return -1;
4014                 p2p->after_scan_tx->freq = freq;
4015                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4016                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4017                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4018                 p2p->after_scan_tx->len = len;
4019                 p2p->after_scan_tx->wait_time = wait_time;
4020                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4021                 return 0;
4022         }
4023
4024         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4025                                      buf, len, wait_time);
4026 }
4027
4028
4029 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4030                            int freq_overall)
4031 {
4032         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4033                 freq_24, freq_5, freq_overall);
4034         p2p->best_freq_24 = freq_24;
4035         p2p->best_freq_5 = freq_5;
4036         p2p->best_freq_overall = freq_overall;
4037 }
4038
4039
4040 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4041 {
4042         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4043         p2p->own_freq_preference = freq;
4044 }
4045
4046
4047 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4048 {
4049         if (p2p == NULL || p2p->go_neg_peer == NULL)
4050                 return NULL;
4051         return p2p->go_neg_peer->info.p2p_device_addr;
4052 }
4053
4054
4055 const struct p2p_peer_info *
4056 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4057 {
4058         struct p2p_device *dev;
4059
4060         if (addr) {
4061                 dev = p2p_get_device(p2p, addr);
4062                 if (!dev)
4063                         return NULL;
4064
4065                 if (!next) {
4066                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4067                                 return NULL;
4068
4069                         return &dev->info;
4070                 } else {
4071                         do {
4072                                 dev = dl_list_first(&dev->list,
4073                                                     struct p2p_device,
4074                                                     list);
4075                                 if (&dev->list == &p2p->devices)
4076                                         return NULL;
4077                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4078                 }
4079         } else {
4080                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4081                 if (!dev)
4082                         return NULL;
4083                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4084                         dev = dl_list_first(&dev->list,
4085                                             struct p2p_device,
4086                                             list);
4087                         if (&dev->list == &p2p->devices)
4088                                 return NULL;
4089                 }
4090         }
4091
4092         return &dev->info;
4093 }
4094
4095
4096 int p2p_in_progress(struct p2p_data *p2p)
4097 {
4098         if (p2p == NULL)
4099                 return 0;
4100         if (p2p->state == P2P_SEARCH || p2p->state == P2P_SEARCH_WHEN_READY ||
4101             p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY)
4102                 return 2;
4103         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4104 }
4105
4106
4107 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4108                             u8 client_timeout)
4109 {
4110         if (p2p) {
4111                 p2p->go_timeout = go_timeout;
4112                 p2p->client_timeout = client_timeout;
4113         }
4114 }
4115
4116
4117 void p2p_increase_search_delay(struct p2p_data *p2p, unsigned int delay)
4118 {
4119         if (p2p && p2p->search_delay < delay)
4120                 p2p->search_delay = delay;
4121 }
4122
4123
4124 #ifdef CONFIG_WIFI_DISPLAY
4125
4126 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4127 {
4128         size_t g;
4129         struct p2p_group *group;
4130
4131         for (g = 0; g < p2p->num_groups; g++) {
4132                 group = p2p->groups[g];
4133                 p2p_group_update_ies(group);
4134         }
4135 }
4136
4137
4138 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4139 {
4140         wpabuf_free(p2p->wfd_ie_beacon);
4141         p2p->wfd_ie_beacon = ie;
4142         p2p_update_wfd_ie_groups(p2p);
4143         return 0;
4144 }
4145
4146
4147 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4148 {
4149         wpabuf_free(p2p->wfd_ie_probe_req);
4150         p2p->wfd_ie_probe_req = ie;
4151         return 0;
4152 }
4153
4154
4155 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4156 {
4157         wpabuf_free(p2p->wfd_ie_probe_resp);
4158         p2p->wfd_ie_probe_resp = ie;
4159         p2p_update_wfd_ie_groups(p2p);
4160         return 0;
4161 }
4162
4163
4164 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4165 {
4166         wpabuf_free(p2p->wfd_ie_assoc_req);
4167         p2p->wfd_ie_assoc_req = ie;
4168         return 0;
4169 }
4170
4171
4172 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4173 {
4174         wpabuf_free(p2p->wfd_ie_invitation);
4175         p2p->wfd_ie_invitation = ie;
4176         return 0;
4177 }
4178
4179
4180 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4181 {
4182         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4183         p2p->wfd_ie_prov_disc_req = ie;
4184         return 0;
4185 }
4186
4187
4188 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4189 {
4190         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4191         p2p->wfd_ie_prov_disc_resp = ie;
4192         return 0;
4193 }
4194
4195
4196 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4197 {
4198         wpabuf_free(p2p->wfd_ie_go_neg);
4199         p2p->wfd_ie_go_neg = ie;
4200         return 0;
4201 }
4202
4203
4204 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4205 {
4206         wpabuf_free(p2p->wfd_dev_info);
4207         if (elem) {
4208                 p2p->wfd_dev_info = wpabuf_dup(elem);
4209                 if (p2p->wfd_dev_info == NULL)
4210                         return -1;
4211         } else
4212                 p2p->wfd_dev_info = NULL;
4213
4214         return 0;
4215 }
4216
4217
4218 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4219 {
4220         wpabuf_free(p2p->wfd_assoc_bssid);
4221         if (elem) {
4222                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4223                 if (p2p->wfd_assoc_bssid == NULL)
4224                         return -1;
4225         } else
4226                 p2p->wfd_assoc_bssid = NULL;
4227
4228         return 0;
4229 }
4230
4231
4232 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4233                                   const struct wpabuf *elem)
4234 {
4235         wpabuf_free(p2p->wfd_coupled_sink_info);
4236         if (elem) {
4237                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4238                 if (p2p->wfd_coupled_sink_info == NULL)
4239                         return -1;
4240         } else
4241                 p2p->wfd_coupled_sink_info = NULL;
4242
4243         return 0;
4244 }
4245
4246 #endif /* CONFIG_WIFI_DISPLAY */
4247
4248
4249 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4250                      int max_disc_tu)
4251 {
4252         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4253                 return -1;
4254
4255         p2p->min_disc_int = min_disc_int;
4256         p2p->max_disc_int = max_disc_int;
4257         p2p->max_disc_tu = max_disc_tu;
4258         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4259                 min_disc_int, max_disc_int, max_disc_tu);
4260
4261         return 0;
4262 }
4263
4264
4265 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4266 {
4267         va_list ap;
4268         char buf[500];
4269
4270         if (!p2p->cfg->debug_print)
4271                 return;
4272
4273         va_start(ap, fmt);
4274         vsnprintf(buf, sizeof(buf), fmt, ap);
4275         buf[sizeof(buf) - 1] = '\0';
4276         va_end(ap);
4277         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4278 }
4279
4280
4281 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4282 {
4283         va_list ap;
4284         char buf[500];
4285
4286         if (!p2p->cfg->debug_print)
4287                 return;
4288
4289         va_start(ap, fmt);
4290         vsnprintf(buf, sizeof(buf), fmt, ap);
4291         buf[sizeof(buf) - 1] = '\0';
4292         va_end(ap);
4293         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4294 }
4295
4296
4297 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4298 {
4299         va_list ap;
4300         char buf[500];
4301
4302         if (!p2p->cfg->debug_print)
4303                 return;
4304
4305         va_start(ap, fmt);
4306         vsnprintf(buf, sizeof(buf), fmt, ap);
4307         buf[sizeof(buf) - 1] = '\0';
4308         va_end(ap);
4309         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4310 }