src/p2p/p2p.c

   1 /*
   2  * Wi-Fi Direct - P2P module
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "crypto/sha256.h"
  17 #include "crypto/crypto.h"
  18 #include "wps/wps_i.h"
  19 #include "p2p_i.h"
  20 #include "p2p.h"
  21
  22
  23 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  24 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  25 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  26                                      const u8 *sa, const u8 *data, size_t len,
  27                                      int rx_freq);
  28 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  29                                       const u8 *sa, const u8 *data,
  30                                       size_t len);
  31 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  32 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  33
  34
  35 /*
  36  * p2p_scan recovery timeout
  37  *
  38  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  39  * timeout for this to avoid hitting P2P timeout unnecessarily.
  40  */
  41 #define P2P_SCAN_TIMEOUT 35
  42
  43 /**
  44  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  45  * entries will be removed
  46  */
  47 #ifndef P2P_PEER_EXPIRATION_AGE
  48 #define P2P_PEER_EXPIRATION_AGE 60
  49 #endif /* P2P_PEER_EXPIRATION_AGE */
  50
  51 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  52
  53 static void p2p_expire_peers(struct p2p_data *p2p)
  54 {
  55         struct p2p_device *dev, *n;
  56         struct os_reltime now;
  57         size_t i;
  58
  59         os_get_reltime(&now);
  60         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  61                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  62                         continue;
  63
  64                 if (dev == p2p->go_neg_peer) {
  65                         /*
  66                          * GO Negotiation is in progress with the peer, so
  67                          * don't expire the peer entry until GO Negotiation
  68                          * fails or times out.
  69                          */
  70                         continue;
  71                 }
  72
  73                 if (p2p->cfg->go_connected &&
  74                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  75                                            dev->info.p2p_device_addr)) {
  76                         /*
  77                          * We are connected as a client to a group in which the
  78                          * peer is the GO, so do not expire the peer entry.
  79                          */
  80                         os_get_reltime(&dev->last_seen);
  81                         continue;
  82                 }
  83
  84                 for (i = 0; i < p2p->num_groups; i++) {
  85                         if (p2p_group_is_client_connected(
  86                                     p2p->groups[i], dev->info.p2p_device_addr))
  87                                 break;
  88                 }
  89                 if (i < p2p->num_groups) {
  90                         /*
  91                          * The peer is connected as a client in a group where
  92                          * we are the GO, so do not expire the peer entry.
  93                          */
  94                         os_get_reltime(&dev->last_seen);
  95                         continue;
  96                 }
  97
  98                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  99                         MAC2STR(dev->info.p2p_device_addr));
 100                 dl_list_del(&dev->list);
 101                 p2p_device_free(p2p, dev);
 102         }
 103 }
 104
 105
 106 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
 107 {
 108         struct p2p_data *p2p = eloop_ctx;
 109         p2p_expire_peers(p2p);
 110         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
 111                                p2p_expiration_timeout, p2p, NULL);
 112 }
 113
 114
 115 static const char * p2p_state_txt(int state)
 116 {
 117         switch (state) {
 118         case P2P_IDLE:
 119                 return "IDLE";
 120         case P2P_SEARCH:
 121                 return "SEARCH";
 122         case P2P_CONNECT:
 123                 return "CONNECT";
 124         case P2P_CONNECT_LISTEN:
 125                 return "CONNECT_LISTEN";
 126         case P2P_GO_NEG:
 127                 return "GO_NEG";
 128         case P2P_LISTEN_ONLY:
 129                 return "LISTEN_ONLY";
 130         case P2P_WAIT_PEER_CONNECT:
 131                 return "WAIT_PEER_CONNECT";
 132         case P2P_WAIT_PEER_IDLE:
 133                 return "WAIT_PEER_IDLE";
 134         case P2P_SD_DURING_FIND:
 135                 return "SD_DURING_FIND";
 136         case P2P_PROVISIONING:
 137                 return "PROVISIONING";
 138         case P2P_PD_DURING_FIND:
 139                 return "PD_DURING_FIND";
 140         case P2P_INVITE:
 141                 return "INVITE";
 142         case P2P_INVITE_LISTEN:
 143                 return "INVITE_LISTEN";
 144         default:
 145                 return "?";
 146         }
 147 }
 148
 149
 150 const char * p2p_get_state_txt(struct p2p_data *p2p)
 151 {
 152         return p2p_state_txt(p2p->state);
 153 }
 154
 155
 156 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
 157 {
 158         return p2p ? p2p->p2ps_adv_list : NULL;
 159 }
 160
 161
 162 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
 163 {
 164         if (p2p && intended_addr)
 165                 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
 166 }
 167
 168
 169 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 170 {
 171         struct p2p_device *dev = NULL;
 172
 173         if (!addr || !p2p)
 174                 return 0;
 175
 176         dev = p2p_get_device(p2p, addr);
 177         if (dev)
 178                 return dev->wps_prov_info;
 179         else
 180                 return 0;
 181 }
 182
 183
 184 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 185 {
 186         struct p2p_device *dev = NULL;
 187
 188         if (!addr || !p2p)
 189                 return;
 190
 191         dev = p2p_get_device(p2p, addr);
 192         if (dev)
 193                 dev->wps_prov_info = 0;
 194 }
 195
 196
 197 void p2p_set_state(struct p2p_data *p2p, int new_state)
 198 {
 199         p2p_dbg(p2p, "State %s -> %s",
 200                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 201         p2p->state = new_state;
 202
 203         if (new_state == P2P_IDLE && p2p->pending_channel) {
 204                 p2p_dbg(p2p, "Apply change in listen channel");
 205                 p2p->cfg->reg_class = p2p->pending_reg_class;
 206                 p2p->cfg->channel = p2p->pending_channel;
 207                 p2p->pending_reg_class = 0;
 208                 p2p->pending_channel = 0;
 209         }
 210 }
 211
 212
 213 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 214 {
 215         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 216                 p2p_state_txt(p2p->state), sec, usec);
 217         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 218         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 219 }
 220
 221
 222 void p2p_clear_timeout(struct p2p_data *p2p)
 223 {
 224         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 225         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 226 }
 227
 228
 229 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
 230 {
 231         struct p2p_go_neg_results res;
 232         struct p2p_device *peer = p2p->go_neg_peer;
 233
 234         if (!peer)
 235                 return;
 236
 237         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 238         if (p2p->state != P2P_SEARCH) {
 239                 /*
 240                  * Clear timeouts related to GO Negotiation if no new p2p_find
 241                  * has been started.
 242                  */
 243                 p2p_clear_timeout(p2p);
 244                 p2p_set_state(p2p, P2P_IDLE);
 245         }
 246
 247         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 248         peer->wps_method = WPS_NOT_READY;
 249         peer->oob_pw_id = 0;
 250         wpabuf_free(peer->go_neg_conf);
 251         peer->go_neg_conf = NULL;
 252         p2p->go_neg_peer = NULL;
 253
 254         os_memset(&res, 0, sizeof(res));
 255         res.status = status;
 256         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 257         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 258         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 259 }
 260
 261
 262 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 263 {
 264         unsigned int r, tu;
 265         int freq;
 266         struct wpabuf *ies;
 267
 268         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 269                 p2p_state_txt(p2p->state));
 270
 271         if (p2p->pending_listen_freq) {
 272                 /* We have a pending p2p_listen request */
 273                 p2p_dbg(p2p, "p2p_listen command pending already");
 274                 return;
 275         }
 276
 277         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 278         if (freq < 0) {
 279                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 280                 return;
 281         }
 282
 283         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 284                 r = 0;
 285         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 286               p2p->min_disc_int) * 100;
 287         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 288                 tu = p2p->max_disc_tu;
 289         if (!dev_disc && tu < 100)
 290                 tu = 100; /* Need to wait in non-device discovery use cases */
 291         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 292                 tu = p2p->cfg->max_listen * 1000 / 1024;
 293
 294         if (tu == 0) {
 295                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 296                 p2p_set_timeout(p2p, 0, 0);
 297                 return;
 298         }
 299
 300         ies = p2p_build_probe_resp_ies(p2p);
 301         if (ies == NULL)
 302                 return;
 303
 304         p2p->pending_listen_freq = freq;
 305         p2p->pending_listen_sec = 0;
 306         p2p->pending_listen_usec = 1024 * tu;
 307
 308         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 309                     ies) < 0) {
 310                 p2p_dbg(p2p, "Failed to start listen mode");
 311                 p2p->pending_listen_freq = 0;
 312         }
 313         wpabuf_free(ies);
 314 }
 315
 316
 317 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 318 {
 319         int freq;
 320         struct wpabuf *ies;
 321
 322         p2p_dbg(p2p, "Going to listen(only) state");
 323
 324         if (p2p->pending_listen_freq) {
 325                 /* We have a pending p2p_listen request */
 326                 p2p_dbg(p2p, "p2p_listen command pending already");
 327                 return -1;
 328         }
 329
 330         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 331         if (freq < 0) {
 332                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 333                 return -1;
 334         }
 335
 336         p2p->pending_listen_sec = timeout / 1000;
 337         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 338
 339         if (p2p->p2p_scan_running) {
 340                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 341                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 342                         return 0;
 343                 }
 344                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 345                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 346                 return 0;
 347         }
 348
 349         ies = p2p_build_probe_resp_ies(p2p);
 350         if (ies == NULL)
 351                 return -1;
 352
 353         p2p->pending_listen_freq = freq;
 354
 355         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 356                 p2p_dbg(p2p, "Failed to start listen mode");
 357                 p2p->pending_listen_freq = 0;
 358                 wpabuf_free(ies);
 359                 return -1;
 360         }
 361         wpabuf_free(ies);
 362
 363         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 364
 365         return 0;
 366 }
 367
 368
 369 static void p2p_device_clear_reported(struct p2p_data *p2p)
 370 {
 371         struct p2p_device *dev;
 372         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 373                 dev->flags &= ~P2P_DEV_REPORTED;
 374                 dev->sd_reqs = 0;
 375         }
 376 }
 377
 378
 379 /**
 380  * p2p_get_device - Fetch a peer entry
 381  * @p2p: P2P module context from p2p_init()
 382  * @addr: P2P Device Address of the peer
 383  * Returns: Pointer to the device entry or %NULL if not found
 384  */
 385 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 386 {
 387         struct p2p_device *dev;
 388         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 389                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 390                         return dev;
 391         }
 392         return NULL;
 393 }
 394
 395
 396 /**
 397  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 398  * @p2p: P2P module context from p2p_init()
 399  * @addr: P2P Interface Address of the peer
 400  * Returns: Pointer to the device entry or %NULL if not found
 401  */
 402 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 403                                              const u8 *addr)
 404 {
 405         struct p2p_device *dev;
 406         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 407                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 408                         return dev;
 409         }
 410         return NULL;
 411 }
 412
 413
 414 /**
 415  * p2p_create_device - Create a peer entry
 416  * @p2p: P2P module context from p2p_init()
 417  * @addr: P2P Device Address of the peer
 418  * Returns: Pointer to the device entry or %NULL on failure
 419  *
 420  * If there is already an entry for the peer, it will be returned instead of
 421  * creating a new one.
 422  */
 423 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 424                                              const u8 *addr)
 425 {
 426         struct p2p_device *dev, *oldest = NULL;
 427         size_t count = 0;
 428
 429         dev = p2p_get_device(p2p, addr);
 430         if (dev)
 431                 return dev;
 432
 433         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 434                 count++;
 435                 if (oldest == NULL ||
 436                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 437                         oldest = dev;
 438         }
 439         if (count + 1 > p2p->cfg->max_peers && oldest) {
 440                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 441                 dl_list_del(&oldest->list);
 442                 p2p_device_free(p2p, oldest);
 443         }
 444
 445         dev = os_zalloc(sizeof(*dev));
 446         if (dev == NULL)
 447                 return NULL;
 448         dl_list_add(&p2p->devices, &dev->list);
 449         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 450
 451         return dev;
 452 }
 453
 454
 455 static void p2p_copy_client_info(struct p2p_device *dev,
 456                                  struct p2p_client_info *cli)
 457 {
 458         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 459         dev->info.device_name[cli->dev_name_len] = '\0';
 460         dev->info.dev_capab = cli->dev_capab;
 461         dev->info.config_methods = cli->config_methods;
 462         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 463         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 464         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 465                   dev->info.wps_sec_dev_type_list_len);
 466 }
 467
 468
 469 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 470                                  const u8 *go_interface_addr, int freq,
 471                                  const u8 *gi, size_t gi_len)
 472 {
 473         struct p2p_group_info info;
 474         size_t c;
 475         struct p2p_device *dev;
 476
 477         if (gi == NULL)
 478                 return 0;
 479
 480         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 481                 return -1;
 482
 483         /*
 484          * Clear old data for this group; if the devices are still in the
 485          * group, the information will be restored in the loop following this.
 486          */
 487         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 488                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 489                               ETH_ALEN) == 0) {
 490                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 491                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 492                 }
 493         }
 494
 495         for (c = 0; c < info.num_clients; c++) {
 496                 struct p2p_client_info *cli = &info.client[c];
 497                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 498                               ETH_ALEN) == 0)
 499                         continue; /* ignore our own entry */
 500                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 501                 if (dev) {
 502                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 503                                           P2P_DEV_PROBE_REQ_ONLY)) {
 504                                 /*
 505                                  * Update information since we have not
 506                                  * received this directly from the client.
 507                                  */
 508                                 p2p_copy_client_info(dev, cli);
 509                         } else {
 510                                 /*
 511                                  * Need to update P2P Client Discoverability
 512                                  * flag since it is valid only in P2P Group
 513                                  * Info attribute.
 514                                  */
 515                                 dev->info.dev_capab &=
 516                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 517                                 dev->info.dev_capab |=
 518                                         cli->dev_capab &
 519                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 520                         }
 521                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 522                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 523                         }
 524                 } else {
 525                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 526                         if (dev == NULL)
 527                                 continue;
 528                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 529                         p2p_copy_client_info(dev, cli);
 530                         dev->oper_freq = freq;
 531                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 532                                             dev->info.p2p_device_addr,
 533                                             &dev->info, 1);
 534                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 535                 }
 536
 537                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 538                           ETH_ALEN);
 539                 os_get_reltime(&dev->last_seen);
 540                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 541                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 542                           ETH_ALEN);
 543         }
 544
 545         return 0;
 546 }
 547
 548
 549 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 550                               int probe_req, const struct p2p_message *msg)
 551 {
 552         os_memcpy(dev->info.device_name, msg->device_name,
 553                   sizeof(dev->info.device_name));
 554
 555         if (msg->manufacturer &&
 556             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 557                 os_memset(dev->info.manufacturer, 0,
 558                           sizeof(dev->info.manufacturer));
 559                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 560                           msg->manufacturer_len);
 561         }
 562
 563         if (msg->model_name &&
 564             msg->model_name_len < sizeof(dev->info.model_name)) {
 565                 os_memset(dev->info.model_name, 0,
 566                           sizeof(dev->info.model_name));
 567                 os_memcpy(dev->info.model_name, msg->model_name,
 568                           msg->model_name_len);
 569         }
 570
 571         if (msg->model_number &&
 572             msg->model_number_len < sizeof(dev->info.model_number)) {
 573                 os_memset(dev->info.model_number, 0,
 574                           sizeof(dev->info.model_number));
 575                 os_memcpy(dev->info.model_number, msg->model_number,
 576                           msg->model_number_len);
 577         }
 578
 579         if (msg->serial_number &&
 580             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 581                 os_memset(dev->info.serial_number, 0,
 582                           sizeof(dev->info.serial_number));
 583                 os_memcpy(dev->info.serial_number, msg->serial_number,
 584                           msg->serial_number_len);
 585         }
 586
 587         if (msg->pri_dev_type)
 588                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 589                           sizeof(dev->info.pri_dev_type));
 590         else if (msg->wps_pri_dev_type)
 591                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 592                           sizeof(dev->info.pri_dev_type));
 593
 594         if (msg->wps_sec_dev_type_list) {
 595                 os_memcpy(dev->info.wps_sec_dev_type_list,
 596                           msg->wps_sec_dev_type_list,
 597                           msg->wps_sec_dev_type_list_len);
 598                 dev->info.wps_sec_dev_type_list_len =
 599                         msg->wps_sec_dev_type_list_len;
 600         }
 601
 602         if (msg->capability) {
 603                 /*
 604                  * P2P Client Discoverability bit is reserved in all frames
 605                  * that use this function, so do not change its value here.
 606                  */
 607                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 608                 dev->info.dev_capab |= msg->capability[0] &
 609                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 610                 dev->info.group_capab = msg->capability[1];
 611         }
 612
 613         if (msg->ext_listen_timing) {
 614                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 615                 dev->ext_listen_interval =
 616                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 617         }
 618
 619         if (!probe_req) {
 620                 u16 new_config_methods;
 621                 new_config_methods = msg->config_methods ?
 622                         msg->config_methods : msg->wps_config_methods;
 623                 if (new_config_methods &&
 624                     dev->info.config_methods != new_config_methods) {
 625                         p2p_dbg(p2p, "Update peer " MACSTR
 626                                 " config_methods 0x%x -> 0x%x",
 627                                 MAC2STR(dev->info.p2p_device_addr),
 628                                 dev->info.config_methods,
 629                                 new_config_methods);
 630                         dev->info.config_methods = new_config_methods;
 631                 }
 632         }
 633 }
 634
 635
 636 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 637                                          size_t ies_len)
 638 {
 639         const u8 *pos, *end;
 640         u8 id, len;
 641
 642         wpabuf_free(dev->info.vendor_elems);
 643         dev->info.vendor_elems = NULL;
 644
 645         end = ies + ies_len;
 646
 647         for (pos = ies; pos + 1 < end; pos += len) {
 648                 id = *pos++;
 649                 len = *pos++;
 650
 651                 if (pos + len > end)
 652                         break;
 653
 654                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 655                         continue;
 656
 657                 if (len >= 4) {
 658                         u32 type = WPA_GET_BE32(pos);
 659
 660                         if (type == WPA_IE_VENDOR_TYPE ||
 661                             type == WMM_IE_VENDOR_TYPE ||
 662                             type == WPS_IE_VENDOR_TYPE ||
 663                             type == P2P_IE_VENDOR_TYPE ||
 664                             type == WFD_IE_VENDOR_TYPE)
 665                                 continue;
 666                 }
 667
 668                 /* Unknown vendor element - make raw IE data available */
 669                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 670                         break;
 671                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 672         }
 673 }
 674
 675
 676 static int p2p_compare_wfd_info(struct p2p_device *dev,
 677                               const struct p2p_message *msg)
 678 {
 679         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 680                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 681                         return 1;
 682
 683                 return os_memcmp(dev->info.wfd_subelems->buf,
 684                                  msg->wfd_subelems->buf,
 685                                  dev->info.wfd_subelems->used);
 686         }
 687         if (dev->info.wfd_subelems || msg->wfd_subelems)
 688                 return 1;
 689
 690         return 0;
 691 }
 692
 693
 694 /**
 695  * p2p_add_device - Add peer entries based on scan results or P2P frames
 696  * @p2p: P2P module context from p2p_init()
 697  * @addr: Source address of Beacon or Probe Response frame (may be either
 698  *      P2P Device Address or P2P Interface Address)
 699  * @level: Signal level (signal strength of the received frame from the peer)
 700  * @freq: Frequency on which the Beacon or Probe Response frame was received
 701  * @rx_time: Time when the result was received
 702  * @ies: IEs from the Beacon or Probe Response frame
 703  * @ies_len: Length of ies buffer in octets
 704  * @scan_res: Whether this was based on scan results
 705  * Returns: 0 on success, -1 on failure
 706  *
 707  * If the scan result is for a GO, the clients in the group will also be added
 708  * to the peer table. This function can also be used with some other frames
 709  * like Provision Discovery Request that contains P2P Capability and P2P Device
 710  * Info attributes.
 711  */
 712 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 713                    struct os_reltime *rx_time, int level, const u8 *ies,
 714                    size_t ies_len, int scan_res)
 715 {
 716         struct p2p_device *dev;
 717         struct p2p_message msg;
 718         const u8 *p2p_dev_addr;
 719         int wfd_changed;
 720         int i;
 721         struct os_reltime time_now;
 722
 723         os_memset(&msg, 0, sizeof(msg));
 724         if (p2p_parse_ies(ies, ies_len, &msg)) {
 725                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 726                 p2p_parse_free(&msg);
 727                 return -1;
 728         }
 729
 730         if (msg.p2p_device_addr)
 731                 p2p_dev_addr = msg.p2p_device_addr;
 732         else if (msg.device_id)
 733                 p2p_dev_addr = msg.device_id;
 734         else {
 735                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 736                 p2p_parse_free(&msg);
 737                 return -1;
 738         }
 739
 740         if (!is_zero_ether_addr(p2p->peer_filter) &&
 741             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 742                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 743                         " due to peer filter", MAC2STR(p2p_dev_addr));
 744                 p2p_parse_free(&msg);
 745                 return 0;
 746         }
 747
 748         dev = p2p_create_device(p2p, p2p_dev_addr);
 749         if (dev == NULL) {
 750                 p2p_parse_free(&msg);
 751                 return -1;
 752         }
 753
 754         if (rx_time == NULL) {
 755                 os_get_reltime(&time_now);
 756                 rx_time = &time_now;
 757         }
 758
 759         /*
 760          * Update the device entry only if the new peer
 761          * entry is newer than the one previously stored.
 762          */
 763         if (dev->last_seen.sec > 0 &&
 764             os_reltime_before(rx_time, &dev->last_seen)) {
 765                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 766                         (unsigned int) rx_time->sec,
 767                         (unsigned int) rx_time->usec,
 768                         (unsigned int) dev->last_seen.sec,
 769                         (unsigned int) dev->last_seen.usec);
 770                 p2p_parse_free(&msg);
 771                 return -1;
 772         }
 773
 774         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 775
 776         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 777
 778         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 779                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 780         if (msg.ssid &&
 781             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 782              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 783              != 0)) {
 784                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 785                 dev->oper_ssid_len = msg.ssid[1];
 786         }
 787
 788         if (msg.adv_service_instance && msg.adv_service_instance_len) {
 789                 wpabuf_free(dev->info.p2ps_instance);
 790                 dev->info.p2ps_instance = wpabuf_alloc_copy(
 791                         msg.adv_service_instance, msg.adv_service_instance_len);
 792         }
 793
 794         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 795             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 796                 int ds_freq;
 797                 if (*msg.ds_params == 14)
 798                         ds_freq = 2484;
 799                 else
 800                         ds_freq = 2407 + *msg.ds_params * 5;
 801                 if (freq != ds_freq) {
 802                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 803                                 freq, ds_freq);
 804                         freq = ds_freq;
 805                 }
 806         }
 807
 808         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 809                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 810                         MACSTR " %d -> %d MHz (DS param %d)",
 811                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 812                         freq, msg.ds_params ? *msg.ds_params : -1);
 813         }
 814         if (scan_res) {
 815                 dev->listen_freq = freq;
 816                 if (msg.group_info)
 817                         dev->oper_freq = freq;
 818         }
 819         dev->info.level = level;
 820
 821         p2p_copy_wps_info(p2p, dev, 0, &msg);
 822
 823         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 824                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 825                 dev->info.wps_vendor_ext[i] = NULL;
 826         }
 827
 828         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 829                 if (msg.wps_vendor_ext[i] == NULL)
 830                         break;
 831                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 832                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 833                 if (dev->info.wps_vendor_ext[i] == NULL)
 834                         break;
 835         }
 836
 837         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 838
 839         if (msg.wfd_subelems) {
 840                 wpabuf_free(dev->info.wfd_subelems);
 841                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 842         }
 843
 844         if (scan_res) {
 845                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 846                                       msg.group_info, msg.group_info_len);
 847         }
 848
 849         p2p_parse_free(&msg);
 850
 851         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 852
 853         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
 854             (!msg.adv_service_instance ||
 855              (dev->flags & P2P_DEV_P2PS_REPORTED)))
 856                 return 0;
 857
 858         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 859                 freq, (unsigned int) rx_time->sec,
 860                 (unsigned int) rx_time->usec);
 861         if (dev->flags & P2P_DEV_USER_REJECTED) {
 862                 p2p_dbg(p2p, "Do not report rejected device");
 863                 return 0;
 864         }
 865
 866         if (dev->info.config_methods == 0 &&
 867             (freq == 2412 || freq == 2437 || freq == 2462)) {
 868                 /*
 869                  * If we have only seen a Beacon frame from a GO, we do not yet
 870                  * know what WPS config methods it supports. Since some
 871                  * applications use config_methods value from P2P-DEVICE-FOUND
 872                  * events, postpone reporting this peer until we've fully
 873                  * discovered its capabilities.
 874                  *
 875                  * At least for now, do this only if the peer was detected on
 876                  * one of the social channels since that peer can be easily be
 877                  * found again and there are no limitations of having to use
 878                  * passive scan on this channels, so this can be done through
 879                  * Probe Response frame that includes the config_methods
 880                  * information.
 881                  */
 882                 p2p_dbg(p2p, "Do not report peer " MACSTR
 883                         " with unknown config methods", MAC2STR(addr));
 884                 return 0;
 885         }
 886
 887         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 888                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 889         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 890
 891         if (msg.adv_service_instance)
 892                 dev->flags |= P2P_DEV_P2PS_REPORTED;
 893
 894         return 0;
 895 }
 896
 897
 898 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 899 {
 900         int i;
 901
 902         if (p2p->go_neg_peer == dev) {
 903                 /*
 904                  * If GO Negotiation is in progress, report that it has failed.
 905                  */
 906                 p2p_go_neg_failed(p2p, -1);
 907         }
 908         if (p2p->invite_peer == dev)
 909                 p2p->invite_peer = NULL;
 910         if (p2p->sd_peer == dev)
 911                 p2p->sd_peer = NULL;
 912         if (p2p->pending_client_disc_go == dev)
 913                 p2p->pending_client_disc_go = NULL;
 914
 915         /* dev_lost() device, but only if it was previously dev_found() */
 916         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 917                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 918                                    dev->info.p2p_device_addr);
 919
 920         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 921                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 922                 dev->info.wps_vendor_ext[i] = NULL;
 923         }
 924
 925         wpabuf_free(dev->info.wfd_subelems);
 926         wpabuf_free(dev->info.vendor_elems);
 927         wpabuf_free(dev->go_neg_conf);
 928         wpabuf_free(dev->info.p2ps_instance);
 929
 930         os_free(dev);
 931 }
 932
 933
 934 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 935 {
 936         struct p2p_channels *c;
 937         struct p2p_reg_class *cla;
 938         size_t cl, ch;
 939         int found = 0;
 940         u8 reg_class;
 941         u8 channel;
 942         int freq;
 943
 944         c = &p2p->cfg->channels;
 945         for (cl = 0; cl < c->reg_classes; cl++) {
 946                 cla = &c->reg_class[cl];
 947                 if (cla->reg_class != p2p->last_prog_scan_class)
 948                         continue;
 949                 for (ch = 0; ch < cla->channels; ch++) {
 950                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 951                                 found = 1;
 952                                 break;
 953                         }
 954                 }
 955                 if (found)
 956                         break;
 957         }
 958
 959         if (!found) {
 960                 /* Start from beginning */
 961                 reg_class = c->reg_class[0].reg_class;
 962                 channel = c->reg_class[0].channel[0];
 963         } else {
 964                 /* Pick the next channel */
 965                 ch++;
 966                 if (ch == cla->channels) {
 967                         cl++;
 968                         if (cl == c->reg_classes)
 969                                 cl = 0;
 970                         ch = 0;
 971                 }
 972                 reg_class = c->reg_class[cl].reg_class;
 973                 channel = c->reg_class[cl].channel[ch];
 974         }
 975
 976         freq = p2p_channel_to_freq(reg_class, channel);
 977         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 978                 reg_class, channel, freq);
 979         p2p->last_prog_scan_class = reg_class;
 980         p2p->last_prog_scan_chan = channel;
 981
 982         if (freq == 2412 || freq == 2437 || freq == 2462)
 983                 return 0; /* No need to add social channels */
 984         return freq;
 985 }
 986
 987
 988 static void p2p_search(struct p2p_data *p2p)
 989 {
 990         int freq = 0;
 991         enum p2p_scan_type type;
 992         u16 pw_id = DEV_PW_DEFAULT;
 993         int res;
 994
 995         if (p2p->drv_in_listen) {
 996                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 997                 return;
 998         }
 999         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1000
1001         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
1002             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
1003                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1004                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1005         } else {
1006                 type = P2P_SCAN_SOCIAL;
1007                 p2p_dbg(p2p, "Starting search");
1008         }
1009
1010         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1011                                  p2p->num_req_dev_types, p2p->req_dev_types,
1012                                  p2p->find_dev_id, pw_id);
1013         if (res < 0) {
1014                 p2p_dbg(p2p, "Scan request schedule failed");
1015                 p2p_continue_find(p2p);
1016         }
1017 }
1018
1019
1020 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1021 {
1022         struct p2p_data *p2p = eloop_ctx;
1023         p2p_dbg(p2p, "Find timeout -> stop");
1024         p2p_stop_find(p2p);
1025 }
1026
1027
1028 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1029 {
1030         if (status != 0) {
1031                 p2p_dbg(p2p, "Scan request failed");
1032                 /* Do continue find even for the first p2p_find_scan */
1033                 p2p_continue_find(p2p);
1034         } else {
1035                 p2p_dbg(p2p, "Running p2p_scan");
1036                 p2p->p2p_scan_running = 1;
1037                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1038                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1039                                        p2p, NULL);
1040         }
1041 }
1042
1043
1044 static int p2p_run_after_scan(struct p2p_data *p2p)
1045 {
1046         struct p2p_device *dev;
1047         enum p2p_after_scan op;
1048
1049         if (p2p->after_scan_tx) {
1050                 p2p->after_scan_tx_in_progress = 1;
1051                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1052                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1053                                       p2p->after_scan_tx->freq,
1054                                       p2p->after_scan_tx->dst,
1055                                       p2p->after_scan_tx->src,
1056                                       p2p->after_scan_tx->bssid,
1057                                       (u8 *) (p2p->after_scan_tx + 1),
1058                                       p2p->after_scan_tx->len,
1059                                       p2p->after_scan_tx->wait_time);
1060                 os_free(p2p->after_scan_tx);
1061                 p2p->after_scan_tx = NULL;
1062                 return 1;
1063         }
1064
1065         op = p2p->start_after_scan;
1066         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1067         switch (op) {
1068         case P2P_AFTER_SCAN_NOTHING:
1069                 break;
1070         case P2P_AFTER_SCAN_LISTEN:
1071                 p2p_dbg(p2p, "Start previously requested Listen state");
1072                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1073                            p2p->pending_listen_usec / 1000);
1074                 return 1;
1075         case P2P_AFTER_SCAN_CONNECT:
1076                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1077                         MAC2STR(p2p->after_scan_peer));
1078                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1079                 if (dev == NULL) {
1080                         p2p_dbg(p2p, "Peer not known anymore");
1081                         break;
1082                 }
1083                 p2p_connect_send(p2p, dev);
1084                 return 1;
1085         }
1086
1087         return 0;
1088 }
1089
1090
1091 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1092 {
1093         struct p2p_data *p2p = eloop_ctx;
1094         int running;
1095         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1096         running = p2p->p2p_scan_running;
1097         /* Make sure we recover from missed scan results callback */
1098         p2p->p2p_scan_running = 0;
1099
1100         if (running)
1101                 p2p_run_after_scan(p2p);
1102 }
1103
1104
1105 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1106 {
1107         p2p->num_req_dev_types = 0;
1108         os_free(p2p->req_dev_types);
1109         p2p->req_dev_types = NULL;
1110 }
1111
1112
1113 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1114 {
1115         u8 buf[SHA256_MAC_LEN];
1116         char str_buf[256];
1117         const u8 *adv_array;
1118         size_t i, adv_len;
1119
1120         if (!str || !hash)
1121                 return 0;
1122
1123         if (!str[0]) {
1124                 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1125                 return 1;
1126         }
1127
1128         adv_array = (u8 *) str_buf;
1129         adv_len = os_strlen(str);
1130
1131         for (i = 0; str[i] && i < adv_len; i++) {
1132                 if (str[i] >= 'A' && str[i] <= 'Z')
1133                         str_buf[i] = str[i] - 'A' + 'a';
1134                 else
1135                         str_buf[i] = str[i];
1136         }
1137
1138         if (sha256_vector(1, &adv_array, &adv_len, buf))
1139                 return 0;
1140
1141         os_memcpy(hash, buf, P2PS_HASH_LEN);
1142         return 1;
1143 }
1144
1145
1146 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1147              enum p2p_discovery_type type,
1148              unsigned int num_req_dev_types, const u8 *req_dev_types,
1149              const u8 *dev_id, unsigned int search_delay,
1150              u8 seek_count, const char **seek)
1151 {
1152         int res;
1153
1154         p2p_dbg(p2p, "Starting find (type=%d)", type);
1155         os_get_reltime(&p2p->find_start);
1156         if (p2p->p2p_scan_running) {
1157                 p2p_dbg(p2p, "p2p_scan is already running");
1158         }
1159
1160         p2p_free_req_dev_types(p2p);
1161         if (req_dev_types && num_req_dev_types) {
1162                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1163                                                WPS_DEV_TYPE_LEN);
1164                 if (p2p->req_dev_types == NULL)
1165                         return -1;
1166                 os_memcpy(p2p->req_dev_types, req_dev_types,
1167                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1168                 p2p->num_req_dev_types = num_req_dev_types;
1169         }
1170
1171         if (dev_id) {
1172                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1173                 p2p->find_dev_id = p2p->find_dev_id_buf;
1174         } else
1175                 p2p->find_dev_id = NULL;
1176
1177         if (seek_count == 0 || !seek) {
1178                 /* Not an ASP search */
1179                 p2p->p2ps_seek = 0;
1180         } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1181                 /*
1182                  * An empty seek string means no hash values, but still an ASP
1183                  * search.
1184                  */
1185                 p2p->p2ps_seek_count = 0;
1186                 p2p->p2ps_seek = 1;
1187         } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1188                 u8 buf[P2PS_HASH_LEN];
1189                 int i;
1190
1191                 p2p->p2ps_seek_count = seek_count;
1192                 for (i = 0; i < seek_count; i++) {
1193                         if (!p2ps_gen_hash(p2p, seek[i], buf))
1194                                 continue;
1195
1196                         /* If asking for wildcard, don't do others */
1197                         if (os_memcmp(buf, p2p->wild_card_hash,
1198                                       P2PS_HASH_LEN) == 0) {
1199                                 p2p->p2ps_seek_count = 0;
1200                                 break;
1201                         }
1202
1203                         os_memcpy(&p2p->query_hash[i * P2PS_HASH_LEN], buf,
1204                                   P2PS_HASH_LEN);
1205                 }
1206                 p2p->p2ps_seek = 1;
1207         } else {
1208                 p2p->p2ps_seek_count = 0;
1209                 p2p->p2ps_seek = 1;
1210         }
1211
1212         /* Special case to perform wildcard search */
1213         if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1214                 p2p->p2ps_seek_count = 1;
1215                 os_memcpy(&p2p->query_hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1216         }
1217
1218         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1219         p2p_clear_timeout(p2p);
1220         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1221         p2p->find_type = type;
1222         p2p_device_clear_reported(p2p);
1223         p2p_set_state(p2p, P2P_SEARCH);
1224         p2p->search_delay = search_delay;
1225         p2p->in_search_delay = 0;
1226         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1227         p2p->last_p2p_find_timeout = timeout;
1228         if (timeout)
1229                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1230                                        p2p, NULL);
1231         switch (type) {
1232         case P2P_FIND_START_WITH_FULL:
1233         case P2P_FIND_PROGRESSIVE:
1234                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1235                                          p2p->num_req_dev_types,
1236                                          p2p->req_dev_types, dev_id,
1237                                          DEV_PW_DEFAULT);
1238                 break;
1239         case P2P_FIND_ONLY_SOCIAL:
1240                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1241                                          p2p->num_req_dev_types,
1242                                          p2p->req_dev_types, dev_id,
1243                                          DEV_PW_DEFAULT);
1244                 break;
1245         default:
1246                 return -1;
1247         }
1248
1249         if (res != 0 && p2p->p2p_scan_running) {
1250                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1251                 /* wait for the previous p2p_scan to complete */
1252                 res = 0; /* do not report failure */
1253         } else if (res != 0) {
1254                 p2p_dbg(p2p, "Failed to start p2p_scan");
1255                 p2p_set_state(p2p, P2P_IDLE);
1256                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1257         }
1258
1259         return res;
1260 }
1261
1262
1263 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1264 {
1265         p2p_dbg(p2p, "Stopping find");
1266         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1267         p2p_clear_timeout(p2p);
1268         if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
1269                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1270
1271         p2p->p2ps_seek_count = 0;
1272
1273         p2p_set_state(p2p, P2P_IDLE);
1274         p2p_free_req_dev_types(p2p);
1275         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1276         if (p2p->go_neg_peer)
1277                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1278         p2p->go_neg_peer = NULL;
1279         p2p->sd_peer = NULL;
1280         p2p->invite_peer = NULL;
1281         p2p_stop_listen_for_freq(p2p, freq);
1282 }
1283
1284
1285 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1286 {
1287         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1288                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1289                 return;
1290         }
1291         if (p2p->in_listen) {
1292                 p2p->in_listen = 0;
1293                 p2p_clear_timeout(p2p);
1294         }
1295         if (p2p->drv_in_listen) {
1296                 /*
1297                  * The driver may not deliver callback to p2p_listen_end()
1298                  * when the operation gets canceled, so clear the internal
1299                  * variable that is tracking driver state.
1300                  */
1301                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1302                 p2p->drv_in_listen = 0;
1303         }
1304         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1305 }
1306
1307
1308 void p2p_stop_listen(struct p2p_data *p2p)
1309 {
1310         if (p2p->state != P2P_LISTEN_ONLY) {
1311                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1312                 return;
1313         }
1314
1315         p2p_stop_listen_for_freq(p2p, 0);
1316         p2p_set_state(p2p, P2P_IDLE);
1317 }
1318
1319
1320 void p2p_stop_find(struct p2p_data *p2p)
1321 {
1322         p2p->pending_listen_freq = 0;
1323         p2p_stop_find_for_freq(p2p, 0);
1324 }
1325
1326
1327 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1328                                     unsigned int force_freq,
1329                                     unsigned int pref_freq, int go)
1330 {
1331         u8 op_class, op_channel;
1332         unsigned int freq = force_freq ? force_freq : pref_freq;
1333
1334         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1335                 force_freq, pref_freq, go);
1336         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1337                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1338                 return -1;
1339         }
1340
1341         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1342             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1343                                           op_channel))) {
1344                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1345                         freq, op_class, op_channel);
1346                 return -1;
1347         }
1348
1349         p2p->op_reg_class = op_class;
1350         p2p->op_channel = op_channel;
1351
1352         if (force_freq) {
1353                 p2p->channels.reg_classes = 1;
1354                 p2p->channels.reg_class[0].channels = 1;
1355                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1356                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1357         } else {
1358                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1359                           sizeof(struct p2p_channels));
1360         }
1361
1362         return 0;
1363 }
1364
1365
1366 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1367 {
1368         u8 op_class, op_channel;
1369         const int op_classes_5ghz[] = { 124, 115, 0 };
1370         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1371         const int op_classes_vht[] = { 128, 0 };
1372
1373         p2p_dbg(p2p, "Prepare channel best");
1374
1375         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1376             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1377             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1378             == 0) {
1379                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1380                 p2p->op_reg_class = op_class;
1381                 p2p->op_channel = op_channel;
1382         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1383                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1384                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1385                    == 0) {
1386                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1387                 p2p->op_reg_class = op_class;
1388                 p2p->op_channel = op_channel;
1389         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1390                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1391                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1392                                        &op_channel) == 0) {
1393                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1394                 p2p->op_reg_class = op_class;
1395                 p2p->op_channel = op_channel;
1396         } else if (p2p->cfg->num_pref_chan > 0 &&
1397                    p2p_channels_includes(&p2p->cfg->channels,
1398                                          p2p->cfg->pref_chan[0].op_class,
1399                                          p2p->cfg->pref_chan[0].chan)) {
1400                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1401                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1402                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1403         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1404                                       &p2p->op_reg_class, &p2p->op_channel) ==
1405                    0) {
1406                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1407                         p2p->op_reg_class, p2p->op_channel);
1408         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1409                                       &p2p->op_reg_class, &p2p->op_channel) ==
1410                    0) {
1411                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1412                         p2p->op_reg_class, p2p->op_channel);
1413         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1414                                       &p2p->op_reg_class, &p2p->op_channel) ==
1415                    0) {
1416                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1417                         p2p->op_reg_class, p2p->op_channel);
1418         } else if (p2p_channels_includes(&p2p->cfg->channels,
1419                                          p2p->cfg->op_reg_class,
1420                                          p2p->cfg->op_channel)) {
1421                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1422                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1423                 p2p->op_channel = p2p->cfg->op_channel;
1424         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1425                                              &p2p->op_reg_class,
1426                                              &p2p->op_channel) == 0) {
1427                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1428                         p2p->op_reg_class, p2p->op_channel);
1429         } else {
1430                 /* Select any random available channel from the first available
1431                  * operating class */
1432                 p2p_channel_select(&p2p->cfg->channels, NULL,
1433                                    &p2p->op_reg_class,
1434                                    &p2p->op_channel);
1435                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1436                         p2p->op_channel, p2p->op_reg_class);
1437         }
1438
1439         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1440                   sizeof(struct p2p_channels));
1441 }
1442
1443
1444 /**
1445  * p2p_prepare_channel - Select operating channel for GO Negotiation
1446  * @p2p: P2P module context from p2p_init()
1447  * @dev: Selected peer device
1448  * @force_freq: Forced frequency in MHz or 0 if not forced
1449  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1450  * @go: Whether the local end will be forced to be GO
1451  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1452  *
1453  * This function is used to do initial operating channel selection for GO
1454  * Negotiation prior to having received peer information. The selected channel
1455  * may be further optimized in p2p_reselect_channel() once the peer information
1456  * is available.
1457  */
1458 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1459                         unsigned int force_freq, unsigned int pref_freq, int go)
1460 {
1461         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1462                 force_freq, pref_freq, go);
1463         if (force_freq || pref_freq) {
1464                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1465                     0)
1466                         return -1;
1467         } else {
1468                 p2p_prepare_channel_best(p2p);
1469         }
1470         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1471         if (go)
1472                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1473         else if (!force_freq)
1474                 p2p_channels_union_inplace(&p2p->channels,
1475                                            &p2p->cfg->cli_channels);
1476         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1477
1478         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1479                 p2p->op_reg_class, p2p->op_channel,
1480                 force_freq ? " (forced)" : "");
1481
1482         if (force_freq)
1483                 dev->flags |= P2P_DEV_FORCE_FREQ;
1484         else
1485                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1486
1487         return 0;
1488 }
1489
1490
1491 static void p2p_set_dev_persistent(struct p2p_device *dev,
1492                                    int persistent_group)
1493 {
1494         switch (persistent_group) {
1495         case 0:
1496                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1497                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1498                 break;
1499         case 1:
1500                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1501                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1502                 break;
1503         case 2:
1504                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1505                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1506                 break;
1507         }
1508 }
1509
1510
1511 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1512                 enum p2p_wps_method wps_method,
1513                 int go_intent, const u8 *own_interface_addr,
1514                 unsigned int force_freq, int persistent_group,
1515                 const u8 *force_ssid, size_t force_ssid_len,
1516                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1517 {
1518         struct p2p_device *dev;
1519
1520         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1521                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1522                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1523                 "oob_pw_id=%u",
1524                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1525                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1526
1527         dev = p2p_get_device(p2p, peer_addr);
1528         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1529                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1530                         MAC2STR(peer_addr));
1531                 return -1;
1532         }
1533
1534         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1535                                 go_intent == 15) < 0)
1536                 return -1;
1537
1538         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1539                 if (!(dev->info.dev_capab &
1540                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1541                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1542                                 " that is in a group and is not discoverable",
1543                                 MAC2STR(peer_addr));
1544                         return -1;
1545                 }
1546                 if (dev->oper_freq <= 0) {
1547                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1548                                 " with incomplete information",
1549                                 MAC2STR(peer_addr));
1550                         return -1;
1551                 }
1552
1553                 /*
1554                  * First, try to connect directly. If the peer does not
1555                  * acknowledge frames, assume it is sleeping and use device
1556                  * discoverability via the GO at that point.
1557                  */
1558         }
1559
1560         p2p->ssid_set = 0;
1561         if (force_ssid) {
1562                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1563                                   force_ssid, force_ssid_len);
1564                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1565                 p2p->ssid_len = force_ssid_len;
1566                 p2p->ssid_set = 1;
1567         }
1568
1569         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1570         dev->flags &= ~P2P_DEV_USER_REJECTED;
1571         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1572         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1573         if (pd_before_go_neg)
1574                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1575         else {
1576                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1577                 /*
1578                  * Assign dialog token and tie breaker here to use the same
1579                  * values in each retry within the same GO Negotiation exchange.
1580                  */
1581                 dev->dialog_token++;
1582                 if (dev->dialog_token == 0)
1583                         dev->dialog_token = 1;
1584                 dev->tie_breaker = p2p->next_tie_breaker;
1585                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1586         }
1587         dev->connect_reqs = 0;
1588         dev->go_neg_req_sent = 0;
1589         dev->go_state = UNKNOWN_GO;
1590         p2p_set_dev_persistent(dev, persistent_group);
1591         p2p->go_intent = go_intent;
1592         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1593
1594         if (p2p->state != P2P_IDLE)
1595                 p2p_stop_find(p2p);
1596
1597         if (p2p->after_scan_tx) {
1598                 /*
1599                  * We need to drop the pending frame to avoid issues with the
1600                  * new GO Negotiation, e.g., when the pending frame was from a
1601                  * previous attempt at starting a GO Negotiation.
1602                  */
1603                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1604                 os_free(p2p->after_scan_tx);
1605                 p2p->after_scan_tx = NULL;
1606         }
1607
1608         dev->wps_method = wps_method;
1609         dev->oob_pw_id = oob_pw_id;
1610         dev->status = P2P_SC_SUCCESS;
1611
1612         if (p2p->p2p_scan_running) {
1613                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1614                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1615                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1616                 return 0;
1617         }
1618         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1619
1620         return p2p_connect_send(p2p, dev);
1621 }
1622
1623
1624 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1625                   enum p2p_wps_method wps_method,
1626                   int go_intent, const u8 *own_interface_addr,
1627                   unsigned int force_freq, int persistent_group,
1628                   const u8 *force_ssid, size_t force_ssid_len,
1629                   unsigned int pref_freq, u16 oob_pw_id)
1630 {
1631         struct p2p_device *dev;
1632
1633         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1634                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1635                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1636                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1637                 wps_method, persistent_group, oob_pw_id);
1638
1639         dev = p2p_get_device(p2p, peer_addr);
1640         if (dev == NULL) {
1641                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1642                         MAC2STR(peer_addr));
1643                 return -1;
1644         }
1645
1646         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1647                                 15) < 0)
1648                 return -1;
1649
1650         p2p->ssid_set = 0;
1651         if (force_ssid) {
1652                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1653                                   force_ssid, force_ssid_len);
1654                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1655                 p2p->ssid_len = force_ssid_len;
1656                 p2p->ssid_set = 1;
1657         }
1658
1659         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1660         dev->flags &= ~P2P_DEV_USER_REJECTED;
1661         dev->go_neg_req_sent = 0;
1662         dev->go_state = UNKNOWN_GO;
1663         p2p_set_dev_persistent(dev, persistent_group);
1664         p2p->go_intent = go_intent;
1665         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1666
1667         dev->wps_method = wps_method;
1668         dev->oob_pw_id = oob_pw_id;
1669         dev->status = P2P_SC_SUCCESS;
1670
1671         return 0;
1672 }
1673
1674
1675 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1676                       struct p2p_device *dev, struct p2p_message *msg)
1677 {
1678         os_get_reltime(&dev->last_seen);
1679
1680         p2p_copy_wps_info(p2p, dev, 0, msg);
1681
1682         if (msg->listen_channel) {
1683                 int freq;
1684                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1685                                            msg->listen_channel[4]);
1686                 if (freq < 0) {
1687                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1688                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1689                                 msg->listen_channel[0],
1690                                 msg->listen_channel[1],
1691                                 msg->listen_channel[2],
1692                                 msg->listen_channel[3],
1693                                 msg->listen_channel[4]);
1694                 } else {
1695                         p2p_dbg(p2p, "Update peer " MACSTR
1696                                 " Listen channel: %u -> %u MHz",
1697                                 MAC2STR(dev->info.p2p_device_addr),
1698                                 dev->listen_freq, freq);
1699                         dev->listen_freq = freq;
1700                 }
1701         }
1702
1703         if (msg->wfd_subelems) {
1704                 wpabuf_free(dev->info.wfd_subelems);
1705                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1706         }
1707
1708         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1709                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1710                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1711         } else {
1712                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1713                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1714                         "listen_freq=%d",
1715                         MAC2STR(dev->info.p2p_device_addr),
1716                         dev->info.dev_capab, dev->info.group_capab,
1717                         dev->info.device_name, dev->listen_freq);
1718         }
1719
1720         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1721
1722         if (dev->flags & P2P_DEV_USER_REJECTED) {
1723                 p2p_dbg(p2p, "Do not report rejected device");
1724                 return;
1725         }
1726
1727         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1728                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1729         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1730 }
1731
1732
1733 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1734 {
1735         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1736         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1737         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1738                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1739         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1740 }
1741
1742
1743 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1744 {
1745         if (p2p->ssid_set) {
1746                 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1747                 params->ssid_len = p2p->ssid_len;
1748         } else {
1749                 p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1750         }
1751         p2p->ssid_set = 0;
1752
1753         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1754         return 0;
1755 }
1756
1757
1758 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1759 {
1760         struct p2p_go_neg_results res;
1761         int go = peer->go_state == LOCAL_GO;
1762         struct p2p_channels intersection;
1763
1764         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1765                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1766
1767         os_memset(&res, 0, sizeof(res));
1768         res.role_go = go;
1769         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1770         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1771         res.wps_method = peer->wps_method;
1772         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1773                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1774                         res.persistent_group = 2;
1775                 else
1776                         res.persistent_group = 1;
1777         }
1778
1779         if (go) {
1780                 /* Setup AP mode for WPS provisioning */
1781                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1782                                                p2p->op_channel);
1783                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1784                 res.ssid_len = p2p->ssid_len;
1785                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1786         } else {
1787                 res.freq = peer->oper_freq;
1788                 if (p2p->ssid_len) {
1789                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1790                         res.ssid_len = p2p->ssid_len;
1791                 }
1792         }
1793
1794         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1795         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1796         p2p_channels_intersect(&p2p->channels, &peer->channels,
1797                                &intersection);
1798         if (go) {
1799                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1800                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1801                                   &intersection);
1802         }
1803
1804         p2p_channels_to_freqs(&intersection, res.freq_list,
1805                               P2P_MAX_CHANNELS);
1806
1807         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1808
1809         p2p_clear_timeout(p2p);
1810         p2p->ssid_set = 0;
1811         peer->go_neg_req_sent = 0;
1812         peer->wps_method = WPS_NOT_READY;
1813         peer->oob_pw_id = 0;
1814         wpabuf_free(peer->go_neg_conf);
1815         peer->go_neg_conf = NULL;
1816
1817         p2p_set_state(p2p, P2P_PROVISIONING);
1818         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1819 }
1820
1821
1822 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1823                               const u8 *data, size_t len, int rx_freq)
1824 {
1825         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1826         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1827
1828         if (len < 1)
1829                 return;
1830
1831         switch (data[0]) {
1832         case P2P_GO_NEG_REQ:
1833                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1834                 break;
1835         case P2P_GO_NEG_RESP:
1836                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1837                 break;
1838         case P2P_GO_NEG_CONF:
1839                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1840                 break;
1841         case P2P_INVITATION_REQ:
1842                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1843                                            rx_freq);
1844                 break;
1845         case P2P_INVITATION_RESP:
1846                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1847                 break;
1848         case P2P_PROV_DISC_REQ:
1849                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1850                 break;
1851         case P2P_PROV_DISC_RESP:
1852                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1853                 break;
1854         case P2P_DEV_DISC_REQ:
1855                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1856                 break;
1857         case P2P_DEV_DISC_RESP:
1858                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1859                 break;
1860         default:
1861                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1862                         data[0]);
1863                 break;
1864         }
1865 }
1866
1867
1868 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1869                                  const u8 *sa, const u8 *bssid, const u8 *data,
1870                                  size_t len, int freq)
1871 {
1872         if (len < 1)
1873                 return;
1874
1875         switch (data[0]) {
1876         case WLAN_PA_VENDOR_SPECIFIC:
1877                 data++;
1878                 len--;
1879                 if (len < 4)
1880                         return;
1881                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1882                         return;
1883
1884                 data += 4;
1885                 len -= 4;
1886
1887                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1888                 break;
1889         case WLAN_PA_GAS_INITIAL_REQ:
1890                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1891                 break;
1892         case WLAN_PA_GAS_INITIAL_RESP:
1893                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1894                 break;
1895         case WLAN_PA_GAS_COMEBACK_REQ:
1896                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1897                 break;
1898         case WLAN_PA_GAS_COMEBACK_RESP:
1899                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1900                 break;
1901         }
1902 }
1903
1904
1905 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1906                    const u8 *bssid, u8 category,
1907                    const u8 *data, size_t len, int freq)
1908 {
1909         if (category == WLAN_ACTION_PUBLIC) {
1910                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1911                 return;
1912         }
1913
1914         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1915                 return;
1916
1917         if (len < 4)
1918                 return;
1919
1920         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1921                 return;
1922         data += 4;
1923         len -= 4;
1924
1925         /* P2P action frame */
1926         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1927         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1928
1929         if (len < 1)
1930                 return;
1931         switch (data[0]) {
1932         case P2P_NOA:
1933                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1934                 /* TODO */
1935                 break;
1936         case P2P_PRESENCE_REQ:
1937                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1938                 break;
1939         case P2P_PRESENCE_RESP:
1940                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1941                 break;
1942         case P2P_GO_DISC_REQ:
1943                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1944                 break;
1945         default:
1946                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1947                 break;
1948         }
1949 }
1950
1951
1952 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1953 {
1954         struct p2p_data *p2p = eloop_ctx;
1955         if (p2p->go_neg_peer == NULL)
1956                 return;
1957         if (p2p->pending_listen_freq) {
1958                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1959                 p2p->pending_listen_freq = 0;
1960         }
1961         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1962         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1963         /*
1964          * Set new timeout to make sure a previously set one does not expire
1965          * too quickly while waiting for the GO Negotiation to complete.
1966          */
1967         p2p_set_timeout(p2p, 0, 500000);
1968         p2p_connect_send(p2p, p2p->go_neg_peer);
1969 }
1970
1971
1972 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1973 {
1974         struct p2p_data *p2p = eloop_ctx;
1975         if (p2p->invite_peer == NULL)
1976                 return;
1977         if (p2p->pending_listen_freq) {
1978                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1979                 p2p->pending_listen_freq = 0;
1980         }
1981         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1982         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1983                         p2p->invite_dev_pw_id);
1984 }
1985
1986
1987 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1988                                        const u8 *ie, size_t ie_len)
1989 {
1990         struct p2p_message msg;
1991         struct p2p_device *dev;
1992
1993         os_memset(&msg, 0, sizeof(msg));
1994         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1995         {
1996                 p2p_parse_free(&msg);
1997                 return; /* not a P2P probe */
1998         }
1999
2000         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2001             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2002             != 0) {
2003                 /* The Probe Request is not part of P2P Device Discovery. It is
2004                  * not known whether the source address of the frame is the P2P
2005                  * Device Address or P2P Interface Address. Do not add a new
2006                  * peer entry based on this frames.
2007                  */
2008                 p2p_parse_free(&msg);
2009                 return;
2010         }
2011
2012         dev = p2p_get_device(p2p, addr);
2013         if (dev) {
2014                 if (dev->country[0] == 0 && msg.listen_channel)
2015                         os_memcpy(dev->country, msg.listen_channel, 3);
2016                 os_get_reltime(&dev->last_seen);
2017                 p2p_parse_free(&msg);
2018                 return; /* already known */
2019         }
2020
2021         dev = p2p_create_device(p2p, addr);
2022         if (dev == NULL) {
2023                 p2p_parse_free(&msg);
2024                 return;
2025         }
2026
2027         os_get_reltime(&dev->last_seen);
2028         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2029
2030         if (msg.listen_channel) {
2031                 os_memcpy(dev->country, msg.listen_channel, 3);
2032                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2033                                                        msg.listen_channel[4]);
2034         }
2035
2036         p2p_copy_wps_info(p2p, dev, 1, &msg);
2037
2038         if (msg.wfd_subelems) {
2039                 wpabuf_free(dev->info.wfd_subelems);
2040                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2041         }
2042
2043         p2p_parse_free(&msg);
2044
2045         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2046                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2047                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2048                 dev->info.group_capab, dev->info.device_name,
2049                 dev->listen_freq);
2050 }
2051
2052
2053 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2054                                                 const u8 *addr,
2055                                                 struct p2p_message *msg)
2056 {
2057         struct p2p_device *dev;
2058
2059         dev = p2p_get_device(p2p, addr);
2060         if (dev) {
2061                 os_get_reltime(&dev->last_seen);
2062                 return dev; /* already known */
2063         }
2064
2065         dev = p2p_create_device(p2p, addr);
2066         if (dev == NULL)
2067                 return NULL;
2068
2069         p2p_add_dev_info(p2p, addr, dev, msg);
2070
2071         return dev;
2072 }
2073
2074
2075 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2076 {
2077         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2078                 return 1;
2079         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2080             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2081             WPA_GET_BE16(&req_dev_type[6]) == 0)
2082                 return 1; /* Category match with wildcard OUI/sub-category */
2083         return 0;
2084 }
2085
2086
2087 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2088                         size_t num_req_dev_type)
2089 {
2090         size_t i;
2091         for (i = 0; i < num_req_dev_type; i++) {
2092                 if (dev_type_match(dev_type, req_dev_type[i]))
2093                         return 1;
2094         }
2095         return 0;
2096 }
2097
2098
2099 /**
2100  * p2p_match_dev_type - Match local device type with requested type
2101  * @p2p: P2P module context from p2p_init()
2102  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2103  * Returns: 1 on match, 0 on mismatch
2104  *
2105  * This function can be used to match the Requested Device Type attribute in
2106  * WPS IE with the local device types for deciding whether to reply to a Probe
2107  * Request frame.
2108  */
2109 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2110 {
2111         struct wps_parse_attr attr;
2112         size_t i;
2113
2114         if (wps_parse_msg(wps, &attr))
2115                 return 1; /* assume no Requested Device Type attributes */
2116
2117         if (attr.num_req_dev_type == 0)
2118                 return 1; /* no Requested Device Type attributes -> match */
2119
2120         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2121                                 attr.num_req_dev_type))
2122                 return 1; /* Own Primary Device Type matches */
2123
2124         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2125                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2126                                         attr.req_dev_type,
2127                                         attr.num_req_dev_type))
2128                         return 1; /* Own Secondary Device Type matches */
2129         }
2130
2131         /* No matching device type found */
2132         return 0;
2133 }
2134
2135
2136 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2137 {
2138         struct wpabuf *buf;
2139         u8 *len;
2140         int pw_id = -1;
2141         size_t extra = 0;
2142
2143 #ifdef CONFIG_WIFI_DISPLAY
2144         if (p2p->wfd_ie_probe_resp)
2145                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2146 #endif /* CONFIG_WIFI_DISPLAY */
2147
2148         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2149                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2150
2151         if (p2p->query_count)
2152                 extra += MAX_SVC_ADV_IE_LEN;
2153
2154         buf = wpabuf_alloc(1000 + extra);
2155         if (buf == NULL)
2156                 return NULL;
2157
2158         if (p2p->go_neg_peer) {
2159                 /* Advertise immediate availability of WPS credential */
2160                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2161         }
2162
2163         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2164                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2165                 wpabuf_free(buf);
2166                 return NULL;
2167         }
2168
2169 #ifdef CONFIG_WIFI_DISPLAY
2170         if (p2p->wfd_ie_probe_resp)
2171                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2172 #endif /* CONFIG_WIFI_DISPLAY */
2173
2174         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2175                 wpabuf_put_buf(buf,
2176                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2177
2178         /* P2P IE */
2179         len = p2p_buf_add_ie_hdr(buf);
2180         p2p_buf_add_capability(buf, p2p->dev_capab &
2181                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2182         if (p2p->ext_listen_interval)
2183                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2184                                               p2p->ext_listen_interval);
2185         p2p_buf_add_device_info(buf, p2p, NULL);
2186         p2p_buf_update_ie_hdr(buf, len);
2187
2188         if (p2p->query_count) {
2189                 p2p_buf_add_service_instance(buf, p2p, p2p->query_count,
2190                                              p2p->query_hash,
2191                                              p2p->p2ps_adv_list);
2192         }
2193
2194         return buf;
2195 }
2196
2197
2198 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2199 {
2200         struct p2ps_advertisement *adv_data;
2201
2202         p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2203
2204         /* Wildcard always matches if we have actual services */
2205         if (os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0)
2206                 return p2p->p2ps_adv_list != NULL;
2207
2208         adv_data = p2p->p2ps_adv_list;
2209         while (adv_data) {
2210                 p2p_dbg(p2p, "ASP hash: %x =? %x", hash[0], adv_data->hash[0]);
2211                 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2212                         return 1;
2213                 adv_data = adv_data->next;
2214         }
2215
2216         return 0;
2217 }
2218
2219
2220 static enum p2p_probe_req_status
2221 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2222                 const u8 *bssid, const u8 *ie, size_t ie_len)
2223 {
2224         struct ieee802_11_elems elems;
2225         struct wpabuf *buf;
2226         struct ieee80211_mgmt *resp;
2227         struct p2p_message msg;
2228         struct wpabuf *ies;
2229
2230         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2231             ParseFailed) {
2232                 /* Ignore invalid Probe Request frames */
2233                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2234                 return P2P_PREQ_MALFORMED;
2235         }
2236
2237         if (elems.p2p == NULL) {
2238                 /* not a P2P probe - ignore it */
2239                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2240                 return P2P_PREQ_NOT_P2P;
2241         }
2242
2243         if (dst && !is_broadcast_ether_addr(dst) &&
2244             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2245                 /* Not sent to the broadcast address or our P2P Device Address
2246                  */
2247                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2248                         MAC2STR(dst));
2249                 return P2P_PREQ_NOT_PROCESSED;
2250         }
2251
2252         if (bssid && !is_broadcast_ether_addr(bssid)) {
2253                 /* Not sent to the Wildcard BSSID */
2254                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2255                         MAC2STR(bssid));
2256                 return P2P_PREQ_NOT_PROCESSED;
2257         }
2258
2259         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2260             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2261             0) {
2262                 /* not using P2P Wildcard SSID - ignore */
2263                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2264                 return P2P_PREQ_NOT_PROCESSED;
2265         }
2266
2267         if (supp_rates_11b_only(&elems)) {
2268                 /* Indicates support for 11b rates only */
2269                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2270                 return P2P_PREQ_NOT_P2P;
2271         }
2272
2273         os_memset(&msg, 0, sizeof(msg));
2274         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2275                 /* Could not parse P2P attributes */
2276                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2277                 return P2P_PREQ_NOT_P2P;
2278         }
2279
2280         p2p->p2ps_svc_found = 0;
2281
2282         if (msg.service_hash && msg.service_hash_count) {
2283                 const u8 *hash = msg.service_hash;
2284                 u8 *dest = p2p->query_hash;
2285                 u8 i;
2286
2287                 p2p->query_count = 0;
2288                 for (i = 0; i < msg.service_hash_count; i++) {
2289                         if (p2p_service_find_asp(p2p, hash)) {
2290                                 p2p->p2ps_svc_found = 1;
2291
2292                                 if (!os_memcmp(hash, p2p->wild_card_hash,
2293                                                P2PS_HASH_LEN)) {
2294                                         /* We found match(es) but wildcard
2295                                          * will return all */
2296                                         p2p->query_count = 1;
2297                                         os_memcpy(p2p->query_hash, hash,
2298                                                   P2PS_HASH_LEN);
2299                                         break;
2300                                 }
2301
2302                                 /* Save each matching hash */
2303                                 if (p2p->query_count < P2P_MAX_QUERY_HASH) {
2304                                         os_memcpy(dest, hash, P2PS_HASH_LEN);
2305                                         dest += P2PS_HASH_LEN;
2306                                         p2p->query_count++;
2307                                 } else {
2308                                         /* We found match(es) but too many to
2309                                          * return all */
2310                                         p2p->query_count = 0;
2311                                         break;
2312                                 }
2313                         }
2314                         hash += P2PS_HASH_LEN;
2315                 }
2316
2317                 p2p_dbg(p2p, "ASP adv found: %d", p2p->p2ps_svc_found);
2318
2319                 /* Probed hash unknown */
2320                 if (!p2p->p2ps_svc_found) {
2321                         p2p_parse_free(&msg);
2322                         return P2P_PREQ_NOT_PROCESSED;
2323                 }
2324         } else {
2325                 /* This is not a P2PS Probe Request */
2326                 p2p->query_count = 0;
2327                 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2328
2329                 if (!p2p->in_listen || !p2p->drv_in_listen) {
2330                         /* not in Listen state - ignore Probe Request */
2331                         p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2332                                 p2p->in_listen, p2p->drv_in_listen);
2333                         p2p_parse_free(&msg);
2334                         return P2P_PREQ_NOT_LISTEN;
2335                 }
2336         }
2337
2338         if (msg.device_id &&
2339             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2340                 /* Device ID did not match */
2341                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2342                         MAC2STR(msg.device_id));
2343                 p2p_parse_free(&msg);
2344                 return P2P_PREQ_NOT_PROCESSED;
2345         }
2346
2347         /* Check Requested Device Type match */
2348         if (msg.wps_attributes &&
2349             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2350                 /* No match with Requested Device Type */
2351                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2352                 p2p_parse_free(&msg);
2353                 return P2P_PREQ_NOT_PROCESSED;
2354         }
2355         p2p_parse_free(&msg);
2356
2357         if (!p2p->cfg->send_probe_resp) {
2358                 /* Response generated elsewhere */
2359                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2360                 return P2P_PREQ_NOT_PROCESSED;
2361         }
2362
2363         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2364
2365         /*
2366          * We do not really have a specific BSS that this frame is advertising,
2367          * so build a frame that has some information in valid format. This is
2368          * really only used for discovery purposes, not to learn exact BSS
2369          * parameters.
2370          */
2371         ies = p2p_build_probe_resp_ies(p2p);
2372         if (ies == NULL)
2373                 return P2P_PREQ_NOT_PROCESSED;
2374
2375         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2376         if (buf == NULL) {
2377                 wpabuf_free(ies);
2378                 return P2P_PREQ_NOT_PROCESSED;
2379         }
2380
2381         resp = NULL;
2382         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2383
2384         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2385                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2386         os_memcpy(resp->da, addr, ETH_ALEN);
2387         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2388         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2389         resp->u.probe_resp.beacon_int = host_to_le16(100);
2390         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2391         resp->u.probe_resp.capab_info =
2392                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2393                              WLAN_CAPABILITY_PRIVACY |
2394                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2395
2396         wpabuf_put_u8(buf, WLAN_EID_SSID);
2397         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2398         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2399
2400         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2401         wpabuf_put_u8(buf, 8);
2402         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2403         wpabuf_put_u8(buf, 90 / 5);
2404         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2405         wpabuf_put_u8(buf, 180 / 5);
2406         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2407         wpabuf_put_u8(buf, 360 / 5);
2408         wpabuf_put_u8(buf, 480 / 5);
2409         wpabuf_put_u8(buf, 540 / 5);
2410
2411         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2412         wpabuf_put_u8(buf, 1);
2413         wpabuf_put_u8(buf, p2p->cfg->channel);
2414
2415         wpabuf_put_buf(buf, ies);
2416         wpabuf_free(ies);
2417
2418         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2419
2420         wpabuf_free(buf);
2421
2422         return P2P_PREQ_NOT_PROCESSED;
2423 }
2424
2425
2426 enum p2p_probe_req_status
2427 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2428                  const u8 *bssid, const u8 *ie, size_t ie_len)
2429 {
2430         enum p2p_probe_req_status res;
2431
2432         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2433
2434         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2435         p2p->query_count = 0;
2436
2437         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2438             p2p->go_neg_peer &&
2439             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2440             == 0 &&
2441             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2442                 /* Received a Probe Request from GO Negotiation peer */
2443                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2444                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2445                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2446                 return P2P_PREQ_PROCESSED;
2447         }
2448
2449         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2450             p2p->invite_peer &&
2451             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2452             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2453             == 0) {
2454                 /* Received a Probe Request from Invite peer */
2455                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2456                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2457                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2458                 return P2P_PREQ_PROCESSED;
2459         }
2460
2461         return res;
2462 }
2463
2464
2465 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2466                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2467 {
2468         struct wpabuf *tmp;
2469         u8 *lpos;
2470         size_t tmplen;
2471         int res;
2472         u8 group_capab;
2473
2474         if (p2p_ie == NULL)
2475                 return 0; /* WLAN AP is not a P2P manager */
2476
2477         /*
2478          * (Re)Association Request - P2P IE
2479          * P2P Capability attribute (shall be present)
2480          * P2P Interface attribute (present if concurrent device and
2481          *      P2P Management is enabled)
2482          */
2483         tmp = wpabuf_alloc(200);
2484         if (tmp == NULL)
2485                 return -1;
2486
2487         lpos = p2p_buf_add_ie_hdr(tmp);
2488         group_capab = 0;
2489         if (p2p->num_groups > 0) {
2490                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2491                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2492                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2493                     p2p->cross_connect)
2494                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2495         }
2496         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2497         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2498             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2499                 p2p_buf_add_p2p_interface(tmp, p2p);
2500         p2p_buf_update_ie_hdr(tmp, lpos);
2501
2502         tmplen = wpabuf_len(tmp);
2503         if (tmplen > len)
2504                 res = -1;
2505         else {
2506                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2507                 res = tmplen;
2508         }
2509         wpabuf_free(tmp);
2510
2511         return res;
2512 }
2513
2514
2515 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2516                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2517 {
2518         struct wpabuf *tmp;
2519         u8 *lpos;
2520         struct p2p_device *peer;
2521         size_t tmplen;
2522         int res;
2523         size_t extra = 0;
2524
2525         if (!p2p_group)
2526                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2527
2528 #ifdef CONFIG_WIFI_DISPLAY
2529         if (p2p->wfd_ie_assoc_req)
2530                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2531 #endif /* CONFIG_WIFI_DISPLAY */
2532
2533         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2534                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2535
2536         /*
2537          * (Re)Association Request - P2P IE
2538          * P2P Capability attribute (shall be present)
2539          * Extended Listen Timing (may be present)
2540          * P2P Device Info attribute (shall be present)
2541          */
2542         tmp = wpabuf_alloc(200 + extra);
2543         if (tmp == NULL)
2544                 return -1;
2545
2546 #ifdef CONFIG_WIFI_DISPLAY
2547         if (p2p->wfd_ie_assoc_req)
2548                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2549 #endif /* CONFIG_WIFI_DISPLAY */
2550
2551         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2552                 wpabuf_put_buf(tmp,
2553                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2554
2555         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2556
2557         lpos = p2p_buf_add_ie_hdr(tmp);
2558         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2559         if (p2p->ext_listen_interval)
2560                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2561                                               p2p->ext_listen_interval);
2562         p2p_buf_add_device_info(tmp, p2p, peer);
2563         p2p_buf_update_ie_hdr(tmp, lpos);
2564
2565         tmplen = wpabuf_len(tmp);
2566         if (tmplen > len)
2567                 res = -1;
2568         else {
2569                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2570                 res = tmplen;
2571         }
2572         wpabuf_free(tmp);
2573
2574         return res;
2575 }
2576
2577
2578 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2579 {
2580         struct wpabuf *p2p_ie;
2581         int ret;
2582
2583         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2584         if (p2p_ie == NULL)
2585                 return 0;
2586
2587         ret = p2p_attr_text(p2p_ie, buf, end);
2588         wpabuf_free(p2p_ie);
2589         return ret;
2590 }
2591
2592
2593 struct p2ps_advertisement *
2594 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2595 {
2596         struct p2ps_advertisement *adv_data;
2597
2598         if (!p2p)
2599                 return NULL;
2600
2601         adv_data = p2p->p2ps_adv_list;
2602         while (adv_data) {
2603                 if (adv_data->id == adv_id)
2604                         return adv_data;
2605                 adv_data = adv_data->next;
2606         }
2607
2608         return NULL;
2609 }
2610
2611
2612 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2613 {
2614         struct p2ps_advertisement *adv_data;
2615         struct p2ps_advertisement **prior;
2616
2617         if (!p2p)
2618                 return -1;
2619
2620         adv_data = p2p->p2ps_adv_list;
2621         prior = &p2p->p2ps_adv_list;
2622         while (adv_data) {
2623                 if (adv_data->id == adv_id) {
2624                         p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2625                         *prior = adv_data->next;
2626                         os_free(adv_data);
2627                         return 0;
2628                 }
2629                 prior = &adv_data->next;
2630                 adv_data = adv_data->next;
2631         }
2632
2633         return -1;
2634 }
2635
2636
2637 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2638                         const char *adv_str, u8 svc_state, u16 config_methods,
2639                         const char *svc_info)
2640 {
2641         struct p2ps_advertisement *adv_data, *tmp, **prev;
2642         u8 buf[P2PS_HASH_LEN];
2643         size_t adv_data_len, adv_len, info_len = 0;
2644
2645         if (!p2p || !adv_str || !adv_str[0])
2646                 return -1;
2647
2648         if (!(config_methods & p2p->cfg->config_methods)) {
2649                 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2650                         config_methods, p2p->cfg->config_methods);
2651                 return -1;
2652         }
2653
2654         if (!p2ps_gen_hash(p2p, adv_str, buf))
2655                 return -1;
2656
2657         if (svc_info)
2658                 info_len = os_strlen(svc_info);
2659         adv_len = os_strlen(adv_str);
2660         adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2661                 info_len + 1;
2662
2663         adv_data = os_zalloc(adv_data_len);
2664         if (!adv_data)
2665                 return -1;
2666
2667         os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2668         adv_data->id = adv_id;
2669         adv_data->state = svc_state;
2670         adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2671         adv_data->auto_accept = (u8) auto_accept;
2672         os_memcpy(adv_data->svc_name, adv_str, adv_len);
2673
2674         if (svc_info && info_len) {
2675                 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2676                 os_memcpy(adv_data->svc_info, svc_info, info_len);
2677         }
2678
2679         /*
2680          * Group Advertisements by service string. They do not need to be
2681          * sorted, but groups allow easier Probe Response instance grouping
2682          */
2683         tmp = p2p->p2ps_adv_list;
2684         prev = &p2p->p2ps_adv_list;
2685         while (tmp) {
2686                 if (tmp->id == adv_data->id) {
2687                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2688                                 os_free(adv_data);
2689                                 return -1;
2690                         }
2691                         adv_data->next = tmp->next;
2692                         *prev = adv_data;
2693                         os_free(tmp);
2694                         goto inserted;
2695                 } else {
2696                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2697                                 adv_data->next = tmp->next;
2698                                 tmp->next = adv_data;
2699                                 goto inserted;
2700                         }
2701                 }
2702                 prev = &tmp->next;
2703                 tmp = tmp->next;
2704         }
2705
2706         /* No svc_name match found */
2707         adv_data->next = p2p->p2ps_adv_list;
2708         p2p->p2ps_adv_list = adv_data;
2709
2710 inserted:
2711         p2p_dbg(p2p,
2712                 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'",
2713                 adv_id, adv_data->config_methods, svc_state, adv_str);
2714
2715         return 0;
2716 }
2717
2718
2719 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2720 {
2721         struct p2p_message msg;
2722
2723         os_memset(&msg, 0, sizeof(msg));
2724         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2725                 return -1;
2726
2727         if (msg.p2p_device_addr) {
2728                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2729                 return 0;
2730         } else if (msg.device_id) {
2731                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2732                 return 0;
2733         }
2734         return -1;
2735 }
2736
2737
2738 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2739 {
2740         struct wpabuf *p2p_ie;
2741         int ret;
2742
2743         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2744                                              P2P_IE_VENDOR_TYPE);
2745         if (p2p_ie == NULL)
2746                 return -1;
2747         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2748         wpabuf_free(p2p_ie);
2749         return ret;
2750 }
2751
2752
2753 static void p2p_clear_go_neg(struct p2p_data *p2p)
2754 {
2755         p2p->go_neg_peer = NULL;
2756         p2p_clear_timeout(p2p);
2757         p2p_set_state(p2p, P2P_IDLE);
2758 }
2759
2760
2761 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2762 {
2763         if (p2p->go_neg_peer == NULL) {
2764                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2765                 return; /* No pending Group Formation */
2766         }
2767
2768         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2769             0) {
2770                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2771                         MACSTR " (GO Negotiation peer " MACSTR ")",
2772                         MAC2STR(mac_addr),
2773                         MAC2STR(p2p->go_neg_peer->intended_addr));
2774                 return; /* Ignore unexpected peer address */
2775         }
2776
2777         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2778                 MAC2STR(mac_addr));
2779
2780         p2p_clear_go_neg(p2p);
2781 }
2782
2783
2784 void p2p_group_formation_failed(struct p2p_data *p2p)
2785 {
2786         if (p2p->go_neg_peer == NULL) {
2787                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2788                 return; /* No pending Group Formation */
2789         }
2790
2791         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2792                 MAC2STR(p2p->go_neg_peer->intended_addr));
2793
2794         p2p_clear_go_neg(p2p);
2795 }
2796
2797
2798 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2799 {
2800         struct p2p_data *p2p;
2801
2802         if (cfg->max_peers < 1 ||
2803             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2804                 return NULL;
2805
2806         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2807         if (p2p == NULL)
2808                 return NULL;
2809         p2p->cfg = (struct p2p_config *) (p2p + 1);
2810         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2811         if (cfg->dev_name)
2812                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2813         if (cfg->manufacturer)
2814                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2815         if (cfg->model_name)
2816                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2817         if (cfg->model_number)
2818                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2819         if (cfg->serial_number)
2820                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2821         if (cfg->pref_chan) {
2822                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2823                                                 sizeof(struct p2p_channel));
2824                 if (p2p->cfg->pref_chan) {
2825                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2826                                   cfg->num_pref_chan *
2827                                   sizeof(struct p2p_channel));
2828                 } else
2829                         p2p->cfg->num_pref_chan = 0;
2830         }
2831
2832         p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2833
2834         p2p->min_disc_int = 1;
2835         p2p->max_disc_int = 3;
2836         p2p->max_disc_tu = -1;
2837
2838         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2839                 p2p->next_tie_breaker = 0;
2840         p2p->next_tie_breaker &= 0x01;
2841         if (cfg->sd_request)
2842                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2843         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2844         if (cfg->concurrent_operations)
2845                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2846         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2847
2848         dl_list_init(&p2p->devices);
2849
2850         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2851                                p2p_expiration_timeout, p2p, NULL);
2852
2853         p2p->go_timeout = 100;
2854         p2p->client_timeout = 20;
2855         p2p->num_p2p_sd_queries = 0;
2856
2857         p2p_dbg(p2p, "initialized");
2858         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2859         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2860
2861         return p2p;
2862 }
2863
2864
2865 void p2p_deinit(struct p2p_data *p2p)
2866 {
2867         struct p2ps_advertisement *adv, *prev;
2868
2869 #ifdef CONFIG_WIFI_DISPLAY
2870         wpabuf_free(p2p->wfd_ie_beacon);
2871         wpabuf_free(p2p->wfd_ie_probe_req);
2872         wpabuf_free(p2p->wfd_ie_probe_resp);
2873         wpabuf_free(p2p->wfd_ie_assoc_req);
2874         wpabuf_free(p2p->wfd_ie_invitation);
2875         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2876         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2877         wpabuf_free(p2p->wfd_ie_go_neg);
2878         wpabuf_free(p2p->wfd_dev_info);
2879         wpabuf_free(p2p->wfd_assoc_bssid);
2880         wpabuf_free(p2p->wfd_coupled_sink_info);
2881 #endif /* CONFIG_WIFI_DISPLAY */
2882
2883         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2884         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2885         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2886         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2887         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2888         p2p_flush(p2p);
2889         p2p_free_req_dev_types(p2p);
2890         os_free(p2p->cfg->dev_name);
2891         os_free(p2p->cfg->manufacturer);
2892         os_free(p2p->cfg->model_name);
2893         os_free(p2p->cfg->model_number);
2894         os_free(p2p->cfg->serial_number);
2895         os_free(p2p->cfg->pref_chan);
2896         os_free(p2p->groups);
2897         os_free(p2p->p2ps_prov);
2898         wpabuf_free(p2p->sd_resp);
2899         os_free(p2p->after_scan_tx);
2900         p2p_remove_wps_vendor_extensions(p2p);
2901         os_free(p2p->no_go_freq.range);
2902
2903         adv = p2p->p2ps_adv_list;
2904         while (adv) {
2905                 prev = adv;
2906                 adv = adv->next;
2907                 os_free(prev);
2908         }
2909
2910         os_free(p2p);
2911 }
2912
2913
2914 void p2p_flush(struct p2p_data *p2p)
2915 {
2916         struct p2p_device *dev, *prev;
2917         p2p_stop_find(p2p);
2918         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2919                               list) {
2920                 dl_list_del(&dev->list);
2921                 p2p_device_free(p2p, dev);
2922         }
2923         p2p_free_sd_queries(p2p);
2924         os_free(p2p->after_scan_tx);
2925         p2p->after_scan_tx = NULL;
2926 }
2927
2928
2929 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2930 {
2931         struct p2p_device *dev;
2932
2933         dev = p2p_get_device(p2p, addr);
2934         if (dev == NULL)
2935                 return -1;
2936
2937         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2938
2939         if (p2p->go_neg_peer == dev) {
2940                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2941                 p2p->go_neg_peer = NULL;
2942         }
2943
2944         dev->wps_method = WPS_NOT_READY;
2945         dev->oob_pw_id = 0;
2946         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2947         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2948
2949         /* Check if after_scan_tx is for this peer. If so free it */
2950         if (p2p->after_scan_tx &&
2951             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2952                 os_free(p2p->after_scan_tx);
2953                 p2p->after_scan_tx = NULL;
2954         }
2955
2956         return 0;
2957 }
2958
2959
2960 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2961 {
2962         os_free(p2p->cfg->dev_name);
2963         if (dev_name) {
2964                 p2p->cfg->dev_name = os_strdup(dev_name);
2965                 if (p2p->cfg->dev_name == NULL)
2966                         return -1;
2967         } else
2968                 p2p->cfg->dev_name = NULL;
2969         return 0;
2970 }
2971
2972
2973 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2974 {
2975         os_free(p2p->cfg->manufacturer);
2976         p2p->cfg->manufacturer = NULL;
2977         if (manufacturer) {
2978                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2979                 if (p2p->cfg->manufacturer == NULL)
2980                         return -1;
2981         }
2982
2983         return 0;
2984 }
2985
2986
2987 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2988 {
2989         os_free(p2p->cfg->model_name);
2990         p2p->cfg->model_name = NULL;
2991         if (model_name) {
2992                 p2p->cfg->model_name = os_strdup(model_name);
2993                 if (p2p->cfg->model_name == NULL)
2994                         return -1;
2995         }
2996
2997         return 0;
2998 }
2999
3000
3001 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3002 {
3003         os_free(p2p->cfg->model_number);
3004         p2p->cfg->model_number = NULL;
3005         if (model_number) {
3006                 p2p->cfg->model_number = os_strdup(model_number);
3007                 if (p2p->cfg->model_number == NULL)
3008                         return -1;
3009         }
3010
3011         return 0;
3012 }
3013
3014
3015 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3016 {
3017         os_free(p2p->cfg->serial_number);
3018         p2p->cfg->serial_number = NULL;
3019         if (serial_number) {
3020                 p2p->cfg->serial_number = os_strdup(serial_number);
3021                 if (p2p->cfg->serial_number == NULL)
3022                         return -1;
3023         }
3024
3025         return 0;
3026 }
3027
3028
3029 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3030 {
3031         p2p->cfg->config_methods = config_methods;
3032 }
3033
3034
3035 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3036 {
3037         os_memcpy(p2p->cfg->uuid, uuid, 16);
3038 }
3039
3040
3041 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3042 {
3043         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3044         return 0;
3045 }
3046
3047
3048 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3049                           size_t num_dev_types)
3050 {
3051         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3052                 num_dev_types = P2P_SEC_DEVICE_TYPES;
3053         p2p->cfg->num_sec_dev_types = num_dev_types;
3054         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3055         return 0;
3056 }
3057
3058
3059 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3060 {
3061         int i;
3062
3063         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3064                 wpabuf_free(p2p->wps_vendor_ext[i]);
3065                 p2p->wps_vendor_ext[i] = NULL;
3066         }
3067 }
3068
3069
3070 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3071                                  const struct wpabuf *vendor_ext)
3072 {
3073         int i;
3074
3075         if (vendor_ext == NULL)
3076                 return -1;
3077
3078         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3079                 if (p2p->wps_vendor_ext[i] == NULL)
3080                         break;
3081         }
3082         if (i >= P2P_MAX_WPS_VENDOR_EXT)
3083                 return -1;
3084
3085         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3086         if (p2p->wps_vendor_ext[i] == NULL)
3087                 return -1;
3088
3089         return 0;
3090 }
3091
3092
3093 int p2p_set_country(struct p2p_data *p2p, const char *country)
3094 {
3095         os_memcpy(p2p->cfg->country, country, 3);
3096         return 0;
3097 }
3098
3099
3100 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3101 {
3102         if (dev->sd_pending_bcast_queries == 0) {
3103                 /* Initialize with total number of registered broadcast
3104                  * SD queries. */
3105                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3106         }
3107
3108         if (p2p_start_sd(p2p, dev) == 0)
3109                 return 1;
3110
3111         if (dev->req_config_methods &&
3112             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3113                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3114                         MACSTR " (config methods 0x%x)",
3115                         MAC2STR(dev->info.p2p_device_addr),
3116                         dev->req_config_methods);
3117                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3118                         return 1;
3119         }
3120
3121         return 0;
3122 }
3123
3124
3125 void p2p_continue_find(struct p2p_data *p2p)
3126 {
3127         struct p2p_device *dev;
3128         int found;
3129
3130         p2p_set_state(p2p, P2P_SEARCH);
3131
3132         /* Continue from the device following the last iteration */
3133         found = 0;
3134         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3135                 if (dev == p2p->last_p2p_find_oper) {
3136                         found = 1;
3137                         continue;
3138                 }
3139                 if (!found)
3140                         continue;
3141                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3142                         p2p->last_p2p_find_oper = dev;
3143                         return;
3144                 }
3145         }
3146
3147         /*
3148          * Wrap around to the beginning of the list and continue until the last
3149          * iteration device.
3150          */
3151         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3152                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3153                         p2p->last_p2p_find_oper = dev;
3154                         return;
3155                 }
3156                 if (dev == p2p->last_p2p_find_oper)
3157                         break;
3158         }
3159
3160         p2p_listen_in_find(p2p, 1);
3161 }
3162
3163
3164 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3165 {
3166         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3167                 success);
3168         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3169
3170         if (!success) {
3171                 if (p2p->sd_peer)
3172                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3173                 p2p->sd_peer = NULL;
3174                 p2p_continue_find(p2p);
3175                 return;
3176         }
3177
3178         if (p2p->sd_peer == NULL) {
3179                 p2p_dbg(p2p, "No SD peer entry known");
3180                 p2p_continue_find(p2p);
3181                 return;
3182         }
3183
3184         if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3185                 /* Update the pending broadcast SD query count for this device
3186                  */
3187                 p2p->sd_peer->sd_pending_bcast_queries--;
3188
3189                 /*
3190                  * If there are no pending broadcast queries for this device,
3191                  * mark it as done (-1).
3192                  */
3193                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3194                         p2p->sd_peer->sd_pending_bcast_queries = -1;
3195         }
3196
3197         /* Wait for response from the peer */
3198         p2p_set_state(p2p, P2P_SD_DURING_FIND);
3199         p2p_set_timeout(p2p, 0, 200000);
3200 }
3201
3202
3203 /**
3204  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3205  * @p2p: P2P module context from p2p_init()
3206  */
3207 static void p2p_retry_pd(struct p2p_data *p2p)
3208 {
3209         struct p2p_device *dev;
3210
3211         /*
3212          * Retry the prov disc req attempt only for the peer that the user had
3213          * requested.
3214          */
3215
3216         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3217                 if (os_memcmp(p2p->pending_pd_devaddr,
3218                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
3219                         continue;
3220                 if (!dev->req_config_methods)
3221                         continue;
3222
3223                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3224                         MACSTR " (config methods 0x%x)",
3225                         MAC2STR(dev->info.p2p_device_addr),
3226                         dev->req_config_methods);
3227                 p2p_send_prov_disc_req(p2p, dev,
3228                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
3229                                        p2p->pd_force_freq);
3230                 return;
3231         }
3232 }
3233
3234
3235 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3236 {
3237         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3238                 success);
3239
3240         /*
3241          * Postpone resetting the pending action state till after we actually
3242          * time out. This allows us to take some action like notifying any
3243          * interested parties about no response to the request.
3244          *
3245          * When the timer (below) goes off we check in IDLE, SEARCH, or
3246          * LISTEN_ONLY state, which are the only allowed states to issue a PD
3247          * requests in, if this was still pending and then raise notification.
3248          */
3249
3250         if (!success) {
3251                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3252
3253                 if (p2p->user_initiated_pd &&
3254                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3255                 {
3256                         /* Retry request from timeout to avoid busy loops */
3257                         p2p->pending_action_state = P2P_PENDING_PD;
3258                         p2p_set_timeout(p2p, 0, 50000);
3259                 } else if (p2p->state != P2P_IDLE)
3260                         p2p_continue_find(p2p);
3261                 else if (p2p->user_initiated_pd) {
3262                         p2p->pending_action_state = P2P_PENDING_PD;
3263                         p2p_set_timeout(p2p, 0, 300000);
3264                 }
3265                 return;
3266         }
3267
3268         /*
3269          * This postponing, of resetting pending_action_state, needs to be
3270          * done only for user initiated PD requests and not internal ones.
3271          */
3272         if (p2p->user_initiated_pd)
3273                 p2p->pending_action_state = P2P_PENDING_PD;
3274         else
3275                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3276
3277         /* Wait for response from the peer */
3278         if (p2p->state == P2P_SEARCH)
3279                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3280         p2p_set_timeout(p2p, 0, 200000);
3281 }
3282
3283
3284 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p)
3285 {
3286         if (p2p->after_scan_tx_in_progress) {
3287                 p2p->after_scan_tx_in_progress = 0;
3288                 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3289                     p2p_run_after_scan(p2p))
3290                         return 1;
3291                 if (p2p->state == P2P_SEARCH) {
3292                         p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3293                         p2p_continue_find(p2p);
3294                 }
3295         }
3296
3297         return 0;
3298 }
3299
3300
3301 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success)
3302 {
3303         p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d",
3304                 success);
3305
3306         if (p2p->send_action_in_progress) {
3307                 p2p->send_action_in_progress = 0;
3308                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3309         }
3310
3311         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3312
3313         if (!success)
3314                 goto continue_search;
3315
3316         if (!p2p->cfg->prov_disc_resp_cb ||
3317             p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1)
3318                 goto continue_search;
3319
3320         p2p_dbg(p2p,
3321                 "Post-Provision Discovery operations started - do not try to continue other P2P operations");
3322         return;
3323
3324 continue_search:
3325         p2p_check_after_scan_tx_continuation(p2p);
3326 }
3327
3328
3329 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3330                          struct os_reltime *rx_time, int level, const u8 *ies,
3331                          size_t ies_len)
3332 {
3333         if (os_reltime_before(rx_time, &p2p->find_start)) {
3334                 /*
3335                  * The driver may have cached (e.g., in cfg80211 BSS table) the
3336                  * scan results for relatively long time. To avoid reporting
3337                  * stale information, update P2P peers only based on results
3338                  * that have based on frames received after the last p2p_find
3339                  * operation was started.
3340                  */
3341                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3342                         " (rx_time=%u.%06u)",
3343                         MAC2STR(bssid), (unsigned int) rx_time->sec,
3344                         (unsigned int) rx_time->usec);
3345                 return 0;
3346         }
3347
3348         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3349
3350         return 0;
3351 }
3352
3353
3354 void p2p_scan_res_handled(struct p2p_data *p2p)
3355 {
3356         if (!p2p->p2p_scan_running) {
3357                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3358         }
3359         p2p->p2p_scan_running = 0;
3360         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3361
3362         if (p2p_run_after_scan(p2p))
3363                 return;
3364         if (p2p->state == P2P_SEARCH)
3365                 p2p_continue_find(p2p);
3366 }
3367
3368
3369 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3370 {
3371         u8 dev_capab;
3372         u8 *len;
3373
3374 #ifdef CONFIG_WIFI_DISPLAY
3375         if (p2p->wfd_ie_probe_req)
3376                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3377 #endif /* CONFIG_WIFI_DISPLAY */
3378
3379         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3380                 wpabuf_put_buf(ies,
3381                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3382
3383         len = p2p_buf_add_ie_hdr(ies);
3384
3385         dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3386
3387         /* P2PS requires Probe Request frames to include SD bit */
3388         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3389                 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3390
3391         p2p_buf_add_capability(ies, dev_capab, 0);
3392
3393         if (dev_id)
3394                 p2p_buf_add_device_id(ies, dev_id);
3395         if (p2p->cfg->reg_class && p2p->cfg->channel)
3396                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3397                                            p2p->cfg->reg_class,
3398                                            p2p->cfg->channel);
3399         if (p2p->ext_listen_interval)
3400                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3401                                               p2p->ext_listen_interval);
3402
3403         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3404                 p2p_buf_add_service_hash(ies, p2p);
3405
3406         /* TODO: p2p_buf_add_operating_channel() if GO */
3407         p2p_buf_update_ie_hdr(ies, len);
3408 }
3409
3410
3411 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3412 {
3413         size_t len = 100;
3414
3415 #ifdef CONFIG_WIFI_DISPLAY
3416         if (p2p && p2p->wfd_ie_probe_req)
3417                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3418 #endif /* CONFIG_WIFI_DISPLAY */
3419
3420         if (p2p && p2p->vendor_elem &&
3421             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3422                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3423
3424         return len;
3425 }
3426
3427
3428 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3429 {
3430         return p2p_attr_text(p2p_ie, buf, end);
3431 }
3432
3433
3434 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3435 {
3436         struct p2p_device *dev = p2p->go_neg_peer;
3437         int timeout;
3438
3439         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3440
3441         if (dev == NULL) {
3442                 p2p_dbg(p2p, "No pending GO Negotiation");
3443                 return;
3444         }
3445
3446         if (success) {
3447                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3448                         p2p_set_state(p2p, P2P_IDLE);
3449                         return;
3450                 }
3451         } else if (dev->go_neg_req_sent) {
3452                 /* Cancel the increment from p2p_connect_send() on failure */
3453                 dev->go_neg_req_sent--;
3454         }
3455
3456         if (!success &&
3457             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3458             !is_zero_ether_addr(dev->member_in_go_dev)) {
3459                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3460                         MAC2STR(dev->info.p2p_device_addr));
3461                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3462                 p2p_send_dev_disc_req(p2p, dev);
3463                 return;
3464         }
3465
3466         /*
3467          * Use P2P find, if needed, to find the other device from its listen
3468          * channel.
3469          */
3470         p2p_set_state(p2p, P2P_CONNECT);
3471         timeout = success ? 500000 : 100000;
3472         if (!success && p2p->go_neg_peer &&
3473             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3474                 unsigned int r;
3475                 /*
3476                  * Peer is expected to wait our response and we will skip the
3477                  * listen phase. Add some randomness to the wait time here to
3478                  * make it less likely to hit cases where we could end up in
3479                  * sync with peer not listening.
3480                  */
3481                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3482                         r = 0;
3483                 timeout += r % 100000;
3484         }
3485         p2p_set_timeout(p2p, 0, timeout);
3486 }
3487
3488
3489 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3490 {
3491         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3492                 success);
3493         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3494                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3495                 return;
3496         }
3497         p2p_set_state(p2p, P2P_CONNECT);
3498         p2p_set_timeout(p2p, 0, 500000);
3499 }
3500
3501
3502 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3503                                        const u8 *addr)
3504 {
3505         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3506         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3507                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3508         } else if (success) {
3509                 struct p2p_device *dev;
3510                 dev = p2p_get_device(p2p, addr);
3511                 if (dev &&
3512                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3513                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3514         }
3515 }
3516
3517
3518 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3519                                enum p2p_send_action_result result)
3520 {
3521         struct p2p_device *dev;
3522
3523         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3524         if (result == P2P_SEND_ACTION_FAILED) {
3525                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3526                 p2p_go_neg_failed(p2p, -1);
3527                 return;
3528         }
3529
3530         dev = p2p->go_neg_peer;
3531
3532         if (result == P2P_SEND_ACTION_NO_ACK) {
3533                 /*
3534                  * Retry GO Negotiation Confirmation
3535                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3536                  * ACK for confirmation.
3537                  */
3538                 if (dev && dev->go_neg_conf &&
3539                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3540                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3541                                 dev->go_neg_conf_sent);
3542                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3543                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3544                                             dev->info.p2p_device_addr,
3545                                             p2p->cfg->dev_addr,
3546                                             dev->info.p2p_device_addr,
3547                                             wpabuf_head(dev->go_neg_conf),
3548                                             wpabuf_len(dev->go_neg_conf), 0) >=
3549                             0) {
3550                                 dev->go_neg_conf_sent++;
3551                                 return;
3552                         }
3553                         p2p_dbg(p2p, "Failed to re-send Action frame");
3554
3555                         /*
3556                          * Continue with the assumption that the first attempt
3557                          * went through and just the ACK frame was lost.
3558                          */
3559                 }
3560
3561                 /*
3562                  * It looks like the TX status for GO Negotiation Confirm is
3563                  * often showing failure even when the peer has actually
3564                  * received the frame. Since the peer may change channels
3565                  * immediately after having received the frame, we may not see
3566                  * an Ack for retries, so just dropping a single frame may
3567                  * trigger this. To allow the group formation to succeed if the
3568                  * peer did indeed receive the frame, continue regardless of
3569                  * the TX status.
3570                  */
3571                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3572         }
3573
3574         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3575
3576         if (dev == NULL)
3577                 return;
3578
3579         p2p_go_complete(p2p, dev);
3580 }
3581
3582
3583 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3584                         const u8 *src, const u8 *bssid,
3585                         enum p2p_send_action_result result)
3586 {
3587         enum p2p_pending_action_state state;
3588         int success;
3589
3590         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3591                 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3592                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3593                 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3594         success = result == P2P_SEND_ACTION_SUCCESS;
3595         state = p2p->pending_action_state;
3596         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3597         switch (state) {
3598         case P2P_NO_PENDING_ACTION:
3599                 if (p2p->send_action_in_progress) {
3600                         p2p->send_action_in_progress = 0;
3601                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3602                 }
3603                 p2p_check_after_scan_tx_continuation(p2p);
3604                 break;
3605         case P2P_PENDING_GO_NEG_REQUEST:
3606                 p2p_go_neg_req_cb(p2p, success);
3607                 break;
3608         case P2P_PENDING_GO_NEG_RESPONSE:
3609                 p2p_go_neg_resp_cb(p2p, success);
3610                 break;
3611         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3612                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3613                 break;
3614         case P2P_PENDING_GO_NEG_CONFIRM:
3615                 p2p_go_neg_conf_cb(p2p, result);
3616                 break;
3617         case P2P_PENDING_SD:
3618                 p2p_sd_cb(p2p, success);
3619                 break;
3620         case P2P_PENDING_PD:
3621                 p2p_prov_disc_cb(p2p, success);
3622                 break;
3623         case P2P_PENDING_PD_RESPONSE:
3624                 p2p_prov_disc_resp_cb(p2p, success);
3625                 break;
3626         case P2P_PENDING_INVITATION_REQUEST:
3627                 p2p_invitation_req_cb(p2p, success);
3628                 break;
3629         case P2P_PENDING_INVITATION_RESPONSE:
3630                 p2p_invitation_resp_cb(p2p, success);
3631                 break;
3632         case P2P_PENDING_DEV_DISC_REQUEST:
3633                 p2p_dev_disc_req_cb(p2p, success);
3634                 break;
3635         case P2P_PENDING_DEV_DISC_RESPONSE:
3636                 p2p_dev_disc_resp_cb(p2p, success);
3637                 break;
3638         case P2P_PENDING_GO_DISC_REQ:
3639                 p2p_go_disc_req_cb(p2p, success);
3640                 break;
3641         }
3642
3643         p2p->after_scan_tx_in_progress = 0;
3644 }
3645
3646
3647 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3648                    unsigned int duration)
3649 {
3650         if (freq == p2p->pending_client_disc_freq) {
3651                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3652                 p2p->pending_client_disc_freq = 0;
3653                 return;
3654         }
3655
3656         if (freq != p2p->pending_listen_freq) {
3657                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3658                         freq, duration, p2p->pending_listen_freq);
3659                 return;
3660         }
3661
3662         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3663                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3664                 p2p->pending_listen_freq);
3665         p2p->in_listen = 1;
3666         p2p->drv_in_listen = freq;
3667         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3668                 /*
3669                  * Add 20 msec extra wait to avoid race condition with driver
3670                  * remain-on-channel end event, i.e., give driver more time to
3671                  * complete the operation before our timeout expires.
3672                  */
3673                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3674                                 p2p->pending_listen_usec + 20000);
3675         }
3676
3677         p2p->pending_listen_freq = 0;
3678 }
3679
3680
3681 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3682 {
3683         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3684         p2p->drv_in_listen = 0;
3685         if (p2p->in_listen)
3686                 return 0; /* Internal timeout will trigger the next step */
3687
3688         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3689                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3690                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3691                         p2p_go_neg_failed(p2p, -1);
3692                         return 0;
3693                 }
3694
3695                 p2p_set_state(p2p, P2P_CONNECT);
3696                 p2p_connect_send(p2p, p2p->go_neg_peer);
3697                 return 1;
3698         } else if (p2p->state == P2P_SEARCH) {
3699                 if (p2p->p2p_scan_running) {
3700                          /*
3701                           * Search is already in progress. This can happen if
3702                           * an Action frame RX is reported immediately after
3703                           * the end of a remain-on-channel operation and the
3704                           * response frame to that is sent using an offchannel
3705                           * operation while in p2p_find. Avoid an attempt to
3706                           * restart a scan here.
3707                           */
3708                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3709                         return 1;
3710                 }
3711                 if (p2p->pending_listen_freq) {
3712                         /*
3713                          * Better wait a bit if the driver is unable to start
3714                          * offchannel operation for some reason. p2p_search()
3715                          * will be started from internal timeout.
3716                          */
3717                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3718                         p2p_set_timeout(p2p, 0, 100000);
3719                         return 1;
3720                 }
3721                 if (p2p->search_delay) {
3722                         p2p_dbg(p2p, "Delay search operation by %u ms",
3723                                 p2p->search_delay);
3724                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3725                                         (p2p->search_delay % 1000) * 1000);
3726                         return 1;
3727                 }
3728                 p2p_search(p2p);
3729                 return 1;
3730         }
3731
3732         return 0;
3733 }
3734
3735
3736 static void p2p_timeout_connect(struct p2p_data *p2p)
3737 {
3738         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3739         if (p2p->go_neg_peer &&
3740             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3741                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3742                 p2p_go_neg_failed(p2p, -1);
3743                 return;
3744         }
3745         if (p2p->go_neg_peer &&
3746             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3747             p2p->go_neg_peer->connect_reqs < 120) {
3748                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3749                 p2p_connect_send(p2p, p2p->go_neg_peer);
3750                 return;
3751         }
3752         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3753                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3754                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3755                 p2p_set_timeout(p2p, 0, 30000);
3756                 return;
3757         }
3758         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3759         p2p_listen_in_find(p2p, 0);
3760 }
3761
3762
3763 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3764 {
3765         if (p2p->go_neg_peer) {
3766                 if (p2p->drv_in_listen) {
3767                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3768                         return;
3769                 }
3770
3771                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3772                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3773                         p2p_go_neg_failed(p2p, -1);
3774                         return;
3775                 }
3776
3777                 p2p_set_state(p2p, P2P_CONNECT);
3778                 p2p_connect_send(p2p, p2p->go_neg_peer);
3779         } else
3780                 p2p_set_state(p2p, P2P_IDLE);
3781 }
3782
3783
3784 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3785 {
3786         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3787
3788         if (p2p->cfg->is_concurrent_session_active &&
3789             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3790                 p2p_set_timeout(p2p, 0, 500000);
3791         else
3792                 p2p_set_timeout(p2p, 0, 200000);
3793 }
3794
3795
3796 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3797 {
3798         struct p2p_device *dev = p2p->go_neg_peer;
3799
3800         if (dev == NULL) {
3801                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3802                 return;
3803         }
3804
3805         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3806         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3807         p2p_listen_in_find(p2p, 0);
3808 }
3809
3810
3811 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3812 {
3813         p2p_dbg(p2p, "Service Discovery Query timeout");
3814         if (p2p->sd_peer) {
3815                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3816                 p2p->sd_peer = NULL;
3817         }
3818         p2p_continue_find(p2p);
3819 }
3820
3821
3822 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3823 {
3824         p2p_dbg(p2p, "Provision Discovery Request timeout");
3825         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3826         p2p_continue_find(p2p);
3827 }
3828
3829
3830 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3831 {
3832         u32 adv_id = 0;
3833         u8 *adv_mac = NULL;
3834
3835         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3836
3837         /*
3838          * For user initiated PD requests that we have not gotten any responses
3839          * for while in IDLE state, we retry them a couple of times before
3840          * giving up.
3841          */
3842         if (!p2p->user_initiated_pd)
3843                 return;
3844
3845         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3846
3847         if (p2p->pd_retries) {
3848                 p2p->pd_retries--;
3849                 p2p_retry_pd(p2p);
3850         } else {
3851                 struct p2p_device *dev;
3852                 int for_join = 0;
3853
3854                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3855                         if (os_memcmp(p2p->pending_pd_devaddr,
3856                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3857                                 continue;
3858                         if (dev->req_config_methods &&
3859                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3860                                 for_join = 1;
3861                 }
3862
3863                 if (p2p->p2ps_prov) {
3864                         adv_id = p2p->p2ps_prov->adv_id;
3865                         adv_mac = p2p->p2ps_prov->adv_mac;
3866                 }
3867
3868                 if (p2p->cfg->prov_disc_fail)
3869                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3870                                                  p2p->pending_pd_devaddr,
3871                                                  for_join ?
3872                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3873                                                  P2P_PROV_DISC_TIMEOUT,
3874                                                  adv_id, adv_mac, NULL);
3875                 p2p_reset_pending_pd(p2p);
3876         }
3877 }
3878
3879
3880 static void p2p_timeout_invite(struct p2p_data *p2p)
3881 {
3882         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3883         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3884         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3885                 /*
3886                  * Better remain on operating channel instead of listen channel
3887                  * when running a group.
3888                  */
3889                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3890                 p2p_set_timeout(p2p, 0, 100000);
3891                 return;
3892         }
3893         p2p_listen_in_find(p2p, 0);
3894 }
3895
3896
3897 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3898 {
3899         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3900                 p2p_set_state(p2p, P2P_INVITE);
3901                 p2p_invite_send(p2p, p2p->invite_peer,
3902                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3903         } else {
3904                 if (p2p->invite_peer) {
3905                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3906                         if (p2p->cfg->invitation_result)
3907                                 p2p->cfg->invitation_result(
3908                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3909                                         p2p->invite_peer->info.p2p_device_addr,
3910                                         0, 0);
3911                 }
3912                 p2p_set_state(p2p, P2P_IDLE);
3913         }
3914 }
3915
3916
3917 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3918 {
3919         struct p2p_data *p2p = eloop_ctx;
3920
3921         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3922
3923         p2p->in_listen = 0;
3924         if (p2p->drv_in_listen) {
3925                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3926                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3927         }
3928
3929         switch (p2p->state) {
3930         case P2P_IDLE:
3931                 /* Check if we timed out waiting for PD req */
3932                 if (p2p->pending_action_state == P2P_PENDING_PD)
3933                         p2p_timeout_prov_disc_req(p2p);
3934                 break;
3935         case P2P_SEARCH:
3936                 /* Check if we timed out waiting for PD req */
3937                 if (p2p->pending_action_state == P2P_PENDING_PD)
3938                         p2p_timeout_prov_disc_req(p2p);
3939                 if (p2p->search_delay && !p2p->in_search_delay) {
3940                         p2p_dbg(p2p, "Delay search operation by %u ms",
3941                                 p2p->search_delay);
3942                         p2p->in_search_delay = 1;
3943                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3944                                         (p2p->search_delay % 1000) * 1000);
3945                         break;
3946                 }
3947                 p2p->in_search_delay = 0;
3948                 p2p_search(p2p);
3949                 break;
3950         case P2P_CONNECT:
3951                 p2p_timeout_connect(p2p);
3952                 break;
3953         case P2P_CONNECT_LISTEN:
3954                 p2p_timeout_connect_listen(p2p);
3955                 break;
3956         case P2P_GO_NEG:
3957                 break;
3958         case P2P_LISTEN_ONLY:
3959                 /* Check if we timed out waiting for PD req */
3960                 if (p2p->pending_action_state == P2P_PENDING_PD)
3961                         p2p_timeout_prov_disc_req(p2p);
3962
3963                 if (p2p->ext_listen_only) {
3964                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3965                         p2p->ext_listen_only = 0;
3966                         p2p_set_state(p2p, P2P_IDLE);
3967                 }
3968                 break;
3969         case P2P_WAIT_PEER_CONNECT:
3970                 p2p_timeout_wait_peer_connect(p2p);
3971                 break;
3972         case P2P_WAIT_PEER_IDLE:
3973                 p2p_timeout_wait_peer_idle(p2p);
3974                 break;
3975         case P2P_SD_DURING_FIND:
3976                 p2p_timeout_sd_during_find(p2p);
3977                 break;
3978         case P2P_PROVISIONING:
3979                 break;
3980         case P2P_PD_DURING_FIND:
3981                 p2p_timeout_prov_disc_during_find(p2p);
3982                 break;
3983         case P2P_INVITE:
3984                 p2p_timeout_invite(p2p);
3985                 break;
3986         case P2P_INVITE_LISTEN:
3987                 p2p_timeout_invite_listen(p2p);
3988                 break;
3989         }
3990 }
3991
3992
3993 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3994 {
3995         struct p2p_device *dev;
3996
3997         dev = p2p_get_device(p2p, peer_addr);
3998         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3999                 MACSTR, MAC2STR(peer_addr));
4000         if (dev == NULL) {
4001                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
4002                 return -1;
4003         }
4004         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
4005         dev->flags |= P2P_DEV_USER_REJECTED;
4006         return 0;
4007 }
4008
4009
4010 const char * p2p_wps_method_text(enum p2p_wps_method method)
4011 {
4012         switch (method) {
4013         case WPS_NOT_READY:
4014                 return "not-ready";
4015         case WPS_PIN_DISPLAY:
4016                 return "Display";
4017         case WPS_PIN_KEYPAD:
4018                 return "Keypad";
4019         case WPS_PBC:
4020                 return "PBC";
4021         case WPS_NFC:
4022                 return "NFC";
4023         case WPS_P2PS:
4024                 return "P2PS";
4025         }
4026
4027         return "??";
4028 }
4029
4030
4031 static const char * p2p_go_state_text(enum p2p_go_state go_state)
4032 {
4033         switch (go_state) {
4034         case UNKNOWN_GO:
4035                 return "unknown";
4036         case LOCAL_GO:
4037                 return "local";
4038         case  REMOTE_GO:
4039                 return "remote";
4040         }
4041
4042         return "??";
4043 }
4044
4045
4046 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4047                                                const u8 *addr, int next)
4048 {
4049         struct p2p_device *dev;
4050
4051         if (addr)
4052                 dev = p2p_get_device(p2p, addr);
4053         else
4054                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4055
4056         if (dev && next) {
4057                 dev = dl_list_first(&dev->list, struct p2p_device, list);
4058                 if (&dev->list == &p2p->devices)
4059                         dev = NULL;
4060         }
4061
4062         if (dev == NULL)
4063                 return NULL;
4064
4065         return &dev->info;
4066 }
4067
4068
4069 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4070                           char *buf, size_t buflen)
4071 {
4072         struct p2p_device *dev;
4073         int res;
4074         char *pos, *end;
4075         struct os_reltime now;
4076
4077         if (info == NULL)
4078                 return -1;
4079
4080         dev = (struct p2p_device *) (((u8 *) info) -
4081                                      offsetof(struct p2p_device, info));
4082
4083         pos = buf;
4084         end = buf + buflen;
4085
4086         os_get_reltime(&now);
4087         res = os_snprintf(pos, end - pos,
4088                           "age=%d\n"
4089                           "listen_freq=%d\n"
4090                           "wps_method=%s\n"
4091                           "interface_addr=" MACSTR "\n"
4092                           "member_in_go_dev=" MACSTR "\n"
4093                           "member_in_go_iface=" MACSTR "\n"
4094                           "go_neg_req_sent=%d\n"
4095                           "go_state=%s\n"
4096                           "dialog_token=%u\n"
4097                           "intended_addr=" MACSTR "\n"
4098                           "country=%c%c\n"
4099                           "oper_freq=%d\n"
4100                           "req_config_methods=0x%x\n"
4101                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4102                           "status=%d\n"
4103                           "invitation_reqs=%u\n",
4104                           (int) (now.sec - dev->last_seen.sec),
4105                           dev->listen_freq,
4106                           p2p_wps_method_text(dev->wps_method),
4107                           MAC2STR(dev->interface_addr),
4108                           MAC2STR(dev->member_in_go_dev),
4109                           MAC2STR(dev->member_in_go_iface),
4110                           dev->go_neg_req_sent,
4111                           p2p_go_state_text(dev->go_state),
4112                           dev->dialog_token,
4113                           MAC2STR(dev->intended_addr),
4114                           dev->country[0] ? dev->country[0] : '_',
4115                           dev->country[1] ? dev->country[1] : '_',
4116                           dev->oper_freq,
4117                           dev->req_config_methods,
4118                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4119                           "[PROBE_REQ_ONLY]" : "",
4120                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4121                           dev->flags & P2P_DEV_NOT_YET_READY ?
4122                           "[NOT_YET_READY]" : "",
4123                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4124                           "[PD_PEER_DISPLAY]" : "",
4125                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4126                           "[PD_PEER_KEYPAD]" : "",
4127                           dev->flags & P2P_DEV_PD_PEER_P2PS ?
4128                           "[PD_PEER_P2PS]" : "",
4129                           dev->flags & P2P_DEV_USER_REJECTED ?
4130                           "[USER_REJECTED]" : "",
4131                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4132                           "[PEER_WAITING_RESPONSE]" : "",
4133                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4134                           "[PREFER_PERSISTENT_GROUP]" : "",
4135                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4136                           "[WAIT_GO_NEG_RESPONSE]" : "",
4137                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4138                           "[WAIT_GO_NEG_CONFIRM]" : "",
4139                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4140                           "[GROUP_CLIENT_ONLY]" : "",
4141                           dev->flags & P2P_DEV_FORCE_FREQ ?
4142                           "[FORCE_FREQ]" : "",
4143                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
4144                           "[PD_FOR_JOIN]" : "",
4145                           dev->status,
4146                           dev->invitation_reqs);
4147         if (os_snprintf_error(end - pos, res))
4148                 return pos - buf;
4149         pos += res;
4150
4151         if (dev->ext_listen_period) {
4152                 res = os_snprintf(pos, end - pos,
4153                                   "ext_listen_period=%u\n"
4154                                   "ext_listen_interval=%u\n",
4155                                   dev->ext_listen_period,
4156                                   dev->ext_listen_interval);
4157                 if (os_snprintf_error(end - pos, res))
4158                         return pos - buf;
4159                 pos += res;
4160         }
4161
4162         if (dev->oper_ssid_len) {
4163                 res = os_snprintf(pos, end - pos,
4164                                   "oper_ssid=%s\n",
4165                                   wpa_ssid_txt(dev->oper_ssid,
4166                                                dev->oper_ssid_len));
4167                 if (os_snprintf_error(end - pos, res))
4168                         return pos - buf;
4169                 pos += res;
4170         }
4171
4172 #ifdef CONFIG_WIFI_DISPLAY
4173         if (dev->info.wfd_subelems) {
4174                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4175                 if (os_snprintf_error(end - pos, res))
4176                         return pos - buf;
4177                 pos += res;
4178
4179                 pos += wpa_snprintf_hex(pos, end - pos,
4180                                         wpabuf_head(dev->info.wfd_subelems),
4181                                         wpabuf_len(dev->info.wfd_subelems));
4182
4183                 res = os_snprintf(pos, end - pos, "\n");
4184                 if (os_snprintf_error(end - pos, res))
4185                         return pos - buf;
4186                 pos += res;
4187         }
4188 #endif /* CONFIG_WIFI_DISPLAY */
4189
4190         return pos - buf;
4191 }
4192
4193
4194 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4195 {
4196         return p2p_get_device(p2p, addr) != NULL;
4197 }
4198
4199
4200 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4201 {
4202         if (enabled) {
4203                 p2p_dbg(p2p, "Client discoverability enabled");
4204                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4205         } else {
4206                 p2p_dbg(p2p, "Client discoverability disabled");
4207                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4208         }
4209 }
4210
4211
4212 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4213                                               u32 duration2, u32 interval2)
4214 {
4215         struct wpabuf *req;
4216         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4217         u8 *len;
4218
4219         req = wpabuf_alloc(100);
4220         if (req == NULL)
4221                 return NULL;
4222
4223         if (duration1 || interval1) {
4224                 os_memset(&desc1, 0, sizeof(desc1));
4225                 desc1.count_type = 1;
4226                 desc1.duration = duration1;
4227                 desc1.interval = interval1;
4228                 ptr1 = &desc1;
4229
4230                 if (duration2 || interval2) {
4231                         os_memset(&desc2, 0, sizeof(desc2));
4232                         desc2.count_type = 2;
4233                         desc2.duration = duration2;
4234                         desc2.interval = interval2;
4235                         ptr2 = &desc2;
4236                 }
4237         }
4238
4239         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4240         len = p2p_buf_add_ie_hdr(req);
4241         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4242         p2p_buf_update_ie_hdr(req, len);
4243
4244         return req;
4245 }
4246
4247
4248 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4249                      const u8 *own_interface_addr, unsigned int freq,
4250                      u32 duration1, u32 interval1, u32 duration2,
4251                      u32 interval2)
4252 {
4253         struct wpabuf *req;
4254
4255         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4256                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4257                 "dur2=%u int2=%u",
4258                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4259                 freq, duration1, interval1, duration2, interval2);
4260
4261         req = p2p_build_presence_req(duration1, interval1, duration2,
4262                                      interval2);
4263         if (req == NULL)
4264                 return -1;
4265
4266         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4267         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4268                             go_interface_addr,
4269                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4270                 p2p_dbg(p2p, "Failed to send Action frame");
4271         }
4272         wpabuf_free(req);
4273
4274         return 0;
4275 }
4276
4277
4278 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4279                                                size_t noa_len, u8 dialog_token)
4280 {
4281         struct wpabuf *resp;
4282         u8 *len;
4283
4284         resp = wpabuf_alloc(100 + noa_len);
4285         if (resp == NULL)
4286                 return NULL;
4287
4288         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4289         len = p2p_buf_add_ie_hdr(resp);
4290         p2p_buf_add_status(resp, status);
4291         if (noa) {
4292                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4293                 wpabuf_put_le16(resp, noa_len);
4294                 wpabuf_put_data(resp, noa, noa_len);
4295         } else
4296                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4297         p2p_buf_update_ie_hdr(resp, len);
4298
4299         return resp;
4300 }
4301
4302
4303 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4304                                      const u8 *sa, const u8 *data, size_t len,
4305                                      int rx_freq)
4306 {
4307         struct p2p_message msg;
4308         u8 status;
4309         struct wpabuf *resp;
4310         size_t g;
4311         struct p2p_group *group = NULL;
4312         int parsed = 0;
4313         u8 noa[50];
4314         int noa_len;
4315
4316         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4317
4318         for (g = 0; g < p2p->num_groups; g++) {
4319                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4320                               ETH_ALEN) == 0) {
4321                         group = p2p->groups[g];
4322                         break;
4323                 }
4324         }
4325         if (group == NULL) {
4326                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4327                         MACSTR, MAC2STR(da));
4328                 return;
4329         }
4330
4331         if (p2p_parse(data, len, &msg) < 0) {
4332                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4333                 status = P2P_SC_FAIL_INVALID_PARAMS;
4334                 goto fail;
4335         }
4336         parsed = 1;
4337
4338         if (msg.noa == NULL) {
4339                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4340                 status = P2P_SC_FAIL_INVALID_PARAMS;
4341                 goto fail;
4342         }
4343
4344         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4345
4346 fail:
4347         if (p2p->cfg->get_noa)
4348                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4349                                             sizeof(noa));
4350         else
4351                 noa_len = -1;
4352         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4353                                        noa_len > 0 ? noa_len : 0,
4354                                        msg.dialog_token);
4355         if (parsed)
4356                 p2p_parse_free(&msg);
4357         if (resp == NULL)
4358                 return;
4359
4360         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4361         if (p2p_send_action(p2p, rx_freq, sa, da, da,
4362                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4363                 p2p_dbg(p2p, "Failed to send Action frame");
4364         }
4365         wpabuf_free(resp);
4366 }
4367
4368
4369 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4370                                       const u8 *sa, const u8 *data, size_t len)
4371 {
4372         struct p2p_message msg;
4373
4374         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4375
4376         if (p2p_parse(data, len, &msg) < 0) {
4377                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4378                 return;
4379         }
4380
4381         if (msg.status == NULL || msg.noa == NULL) {
4382                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4383                 p2p_parse_free(&msg);
4384                 return;
4385         }
4386
4387         if (p2p->cfg->presence_resp) {
4388                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4389                                         msg.noa, msg.noa_len);
4390         }
4391
4392         if (*msg.status) {
4393                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4394                         *msg.status);
4395                 p2p_parse_free(&msg);
4396                 return;
4397         }
4398
4399         p2p_dbg(p2p, "P2P Presence Request was accepted");
4400         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4401                     msg.noa, msg.noa_len);
4402         /* TODO: process NoA */
4403         p2p_parse_free(&msg);
4404 }
4405
4406
4407 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4408 {
4409         struct p2p_data *p2p = eloop_ctx;
4410
4411         if (p2p->ext_listen_interval) {
4412                 /* Schedule next extended listen timeout */
4413                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4414                                        p2p->ext_listen_interval_usec,
4415                                        p2p_ext_listen_timeout, p2p, NULL);
4416         }
4417
4418         if ((p2p->cfg->is_p2p_in_progress &&
4419              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4420             (p2p->pending_action_state == P2P_PENDING_PD &&
4421              p2p->pd_retries > 0)) {
4422                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4423                         p2p_state_txt(p2p->state));
4424                 return;
4425         }
4426
4427         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4428                 /*
4429                  * This should not really happen, but it looks like the Listen
4430                  * command may fail is something else (e.g., a scan) was
4431                  * running at an inconvenient time. As a workaround, allow new
4432                  * Extended Listen operation to be started.
4433                  */
4434                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4435                 p2p->ext_listen_only = 0;
4436                 p2p_set_state(p2p, P2P_IDLE);
4437         }
4438
4439         if (p2p->state != P2P_IDLE) {
4440                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4441                 return;
4442         }
4443
4444         p2p_dbg(p2p, "Extended Listen timeout");
4445         p2p->ext_listen_only = 1;
4446         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4447                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4448                 p2p->ext_listen_only = 0;
4449         }
4450 }
4451
4452
4453 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4454                    unsigned int interval)
4455 {
4456         if (period > 65535 || interval > 65535 || period > interval ||
4457             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4458                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4459                         period, interval);
4460                 return -1;
4461         }
4462
4463         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4464
4465         if (interval == 0) {
4466                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4467                 p2p->ext_listen_period = 0;
4468                 p2p->ext_listen_interval = 0;
4469                 return 0;
4470         }
4471
4472         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4473                 period, interval);
4474         p2p->ext_listen_period = period;
4475         p2p->ext_listen_interval = interval;
4476         p2p->ext_listen_interval_sec = interval / 1000;
4477         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4478
4479         eloop_register_timeout(p2p->ext_listen_interval_sec,
4480                                p2p->ext_listen_interval_usec,
4481                                p2p_ext_listen_timeout, p2p, NULL);
4482
4483         return 0;
4484 }
4485
4486
4487 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4488                       const u8 *ie, size_t ie_len)
4489 {
4490         struct p2p_message msg;
4491
4492         if (bssid == NULL || ie == NULL)
4493                 return;
4494
4495         os_memset(&msg, 0, sizeof(msg));
4496         if (p2p_parse_ies(ie, ie_len, &msg))
4497                 return;
4498         if (msg.minor_reason_code == NULL) {
4499                 p2p_parse_free(&msg);
4500                 return;
4501         }
4502
4503         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4504                 " reason_code=%u minor_reason_code=%u",
4505                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4506
4507         p2p_parse_free(&msg);
4508 }
4509
4510
4511 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4512                         const u8 *ie, size_t ie_len)
4513 {
4514         struct p2p_message msg;
4515
4516         if (bssid == NULL || ie == NULL)
4517                 return;
4518
4519         os_memset(&msg, 0, sizeof(msg));
4520         if (p2p_parse_ies(ie, ie_len, &msg))
4521                 return;
4522         if (msg.minor_reason_code == NULL) {
4523                 p2p_parse_free(&msg);
4524                 return;
4525         }
4526
4527         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4528                 " reason_code=%u minor_reason_code=%u",
4529                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4530
4531         p2p_parse_free(&msg);
4532 }
4533
4534
4535 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4536 {
4537         if (enabled) {
4538                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4539                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4540         } else {
4541                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4542                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4543         }
4544 }
4545
4546
4547 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4548                                  u8 *op_channel)
4549 {
4550         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4551 }
4552
4553
4554 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4555                            u8 forced)
4556 {
4557         if (p2p_channel_to_freq(reg_class, channel) < 0)
4558                 return -1;
4559
4560         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4561                 reg_class, channel);
4562
4563         /*
4564          * Listen channel was set in configuration or set by control interface;
4565          * cannot override it.
4566          */
4567         if (p2p->cfg->channel_forced && forced == 0)
4568                 return -1;
4569
4570         if (p2p->state == P2P_IDLE) {
4571                 p2p->cfg->reg_class = reg_class;
4572                 p2p->cfg->channel = channel;
4573                 p2p->cfg->channel_forced = forced;
4574         } else {
4575                 p2p_dbg(p2p, "Defer setting listen channel");
4576                 p2p->pending_reg_class = reg_class;
4577                 p2p->pending_channel = channel;
4578                 p2p->pending_channel_forced = forced;
4579         }
4580
4581         return 0;
4582 }
4583
4584
4585 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4586 {
4587         return p2p->cfg->channel;
4588 }
4589
4590
4591 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4592 {
4593         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4594         if (postfix == NULL) {
4595                 p2p->cfg->ssid_postfix_len = 0;
4596                 return 0;
4597         }
4598         if (len > sizeof(p2p->cfg->ssid_postfix))
4599                 return -1;
4600         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4601         p2p->cfg->ssid_postfix_len = len;
4602         return 0;
4603 }
4604
4605
4606 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4607                          int cfg_op_channel)
4608 {
4609         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4610                 return -1;
4611
4612         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4613                 op_reg_class, op_channel);
4614         p2p->cfg->op_reg_class = op_reg_class;
4615         p2p->cfg->op_channel = op_channel;
4616         p2p->cfg->cfg_op_channel = cfg_op_channel;
4617         return 0;
4618 }
4619
4620
4621 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4622                       const struct p2p_channel *pref_chan)
4623 {
4624         struct p2p_channel *n;
4625
4626         if (pref_chan) {
4627                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4628                 if (n == NULL)
4629                         return -1;
4630                 os_memcpy(n, pref_chan,
4631                           num_pref_chan * sizeof(struct p2p_channel));
4632         } else
4633                 n = NULL;
4634
4635         os_free(p2p->cfg->pref_chan);
4636         p2p->cfg->pref_chan = n;
4637         p2p->cfg->num_pref_chan = num_pref_chan;
4638
4639         return 0;
4640 }
4641
4642
4643 int p2p_set_no_go_freq(struct p2p_data *p2p,
4644                        const struct wpa_freq_range_list *list)
4645 {
4646         struct wpa_freq_range *tmp;
4647
4648         if (list == NULL || list->num == 0) {
4649                 os_free(p2p->no_go_freq.range);
4650                 p2p->no_go_freq.range = NULL;
4651                 p2p->no_go_freq.num = 0;
4652                 return 0;
4653         }
4654
4655         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4656         if (tmp == NULL)
4657                 return -1;
4658         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4659         os_free(p2p->no_go_freq.range);
4660         p2p->no_go_freq.range = tmp;
4661         p2p->no_go_freq.num = list->num;
4662         p2p_dbg(p2p, "Updated no GO chan list");
4663
4664         return 0;
4665 }
4666
4667
4668 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4669                            u8 *iface_addr)
4670 {
4671         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4672         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4673                 return -1;
4674         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4675         return 0;
4676 }
4677
4678
4679 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4680                            u8 *dev_addr)
4681 {
4682         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4683         if (dev == NULL)
4684                 return -1;
4685         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4686         return 0;
4687 }
4688
4689
4690 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4691 {
4692         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4693         if (is_zero_ether_addr(p2p->peer_filter))
4694                 p2p_dbg(p2p, "Disable peer filter");
4695         else
4696                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4697                         MAC2STR(p2p->peer_filter));
4698 }
4699
4700
4701 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4702 {
4703         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4704         if (p2p->cross_connect == enabled)
4705                 return;
4706         p2p->cross_connect = enabled;
4707         /* TODO: may need to tear down any action group where we are GO(?) */
4708 }
4709
4710
4711 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4712 {
4713         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4714         if (dev == NULL)
4715                 return -1;
4716         if (dev->oper_freq <= 0)
4717                 return -1;
4718         return dev->oper_freq;
4719 }
4720
4721
4722 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4723 {
4724         p2p_dbg(p2p, "Intra BSS distribution %s",
4725                 enabled ? "enabled" : "disabled");
4726         p2p->cfg->p2p_intra_bss = enabled;
4727 }
4728
4729
4730 void p2p_update_channel_list(struct p2p_data *p2p,
4731                              const struct p2p_channels *chan,
4732                              const struct p2p_channels *cli_chan)
4733 {
4734         p2p_dbg(p2p, "Update channel list");
4735         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4736         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4737         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4738                   sizeof(struct p2p_channels));
4739         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4740 }
4741
4742
4743 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4744                     const u8 *src, const u8 *bssid, const u8 *buf,
4745                     size_t len, unsigned int wait_time)
4746 {
4747         if (p2p->p2p_scan_running) {
4748                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4749                 if (p2p->after_scan_tx) {
4750                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4751                         os_free(p2p->after_scan_tx);
4752                 }
4753                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4754                                                len);
4755                 if (p2p->after_scan_tx == NULL)
4756                         return -1;
4757                 p2p->after_scan_tx->freq = freq;
4758                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4759                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4760                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4761                 p2p->after_scan_tx->len = len;
4762                 p2p->after_scan_tx->wait_time = wait_time;
4763                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4764                 return 0;
4765         }
4766
4767         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4768                                      buf, len, wait_time);
4769 }
4770
4771
4772 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4773                            int freq_overall)
4774 {
4775         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4776                 freq_24, freq_5, freq_overall);
4777         p2p->best_freq_24 = freq_24;
4778         p2p->best_freq_5 = freq_5;
4779         p2p->best_freq_overall = freq_overall;
4780 }
4781
4782
4783 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4784 {
4785         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4786         p2p->own_freq_preference = freq;
4787 }
4788
4789
4790 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4791 {
4792         if (p2p == NULL || p2p->go_neg_peer == NULL)
4793                 return NULL;
4794         return p2p->go_neg_peer->info.p2p_device_addr;
4795 }
4796
4797
4798 const struct p2p_peer_info *
4799 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4800 {
4801         struct p2p_device *dev;
4802
4803         if (addr) {
4804                 dev = p2p_get_device(p2p, addr);
4805                 if (!dev)
4806                         return NULL;
4807
4808                 if (!next) {
4809                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4810                                 return NULL;
4811
4812                         return &dev->info;
4813                 } else {
4814                         do {
4815                                 dev = dl_list_first(&dev->list,
4816                                                     struct p2p_device,
4817                                                     list);
4818                                 if (!dev || &dev->list == &p2p->devices)
4819                                         return NULL;
4820                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4821                 }
4822         } else {
4823                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4824                 if (!dev)
4825                         return NULL;
4826                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4827                         dev = dl_list_first(&dev->list,
4828                                             struct p2p_device,
4829                                             list);
4830                         if (!dev || &dev->list == &p2p->devices)
4831                                 return NULL;
4832                 }
4833         }
4834
4835         return &dev->info;
4836 }
4837
4838
4839 int p2p_in_progress(struct p2p_data *p2p)
4840 {
4841         if (p2p == NULL)
4842                 return 0;
4843         if (p2p->state == P2P_SEARCH)
4844                 return 2;
4845         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4846 }
4847
4848
4849 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4850                             u8 client_timeout)
4851 {
4852         if (p2p) {
4853                 p2p->go_timeout = go_timeout;
4854                 p2p->client_timeout = client_timeout;
4855         }
4856 }
4857
4858
4859 #ifdef CONFIG_WIFI_DISPLAY
4860
4861 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4862 {
4863         size_t g;
4864         struct p2p_group *group;
4865
4866         for (g = 0; g < p2p->num_groups; g++) {
4867                 group = p2p->groups[g];
4868                 p2p_group_force_beacon_update_ies(group);
4869         }
4870 }
4871
4872
4873 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4874 {
4875         wpabuf_free(p2p->wfd_ie_beacon);
4876         p2p->wfd_ie_beacon = ie;
4877         p2p_update_wfd_ie_groups(p2p);
4878         return 0;
4879 }
4880
4881
4882 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4883 {
4884         wpabuf_free(p2p->wfd_ie_probe_req);
4885         p2p->wfd_ie_probe_req = ie;
4886         return 0;
4887 }
4888
4889
4890 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4891 {
4892         wpabuf_free(p2p->wfd_ie_probe_resp);
4893         p2p->wfd_ie_probe_resp = ie;
4894         p2p_update_wfd_ie_groups(p2p);
4895         return 0;
4896 }
4897
4898
4899 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4900 {
4901         wpabuf_free(p2p->wfd_ie_assoc_req);
4902         p2p->wfd_ie_assoc_req = ie;
4903         return 0;
4904 }
4905
4906
4907 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4908 {
4909         wpabuf_free(p2p->wfd_ie_invitation);
4910         p2p->wfd_ie_invitation = ie;
4911         return 0;
4912 }
4913
4914
4915 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4916 {
4917         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4918         p2p->wfd_ie_prov_disc_req = ie;
4919         return 0;
4920 }
4921
4922
4923 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4924 {
4925         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4926         p2p->wfd_ie_prov_disc_resp = ie;
4927         return 0;
4928 }
4929
4930
4931 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4932 {
4933         wpabuf_free(p2p->wfd_ie_go_neg);
4934         p2p->wfd_ie_go_neg = ie;
4935         return 0;
4936 }
4937
4938
4939 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4940 {
4941         wpabuf_free(p2p->wfd_dev_info);
4942         if (elem) {
4943                 p2p->wfd_dev_info = wpabuf_dup(elem);
4944                 if (p2p->wfd_dev_info == NULL)
4945                         return -1;
4946         } else
4947                 p2p->wfd_dev_info = NULL;
4948
4949         return 0;
4950 }
4951
4952
4953 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4954 {
4955         wpabuf_free(p2p->wfd_assoc_bssid);
4956         if (elem) {
4957                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4958                 if (p2p->wfd_assoc_bssid == NULL)
4959                         return -1;
4960         } else
4961                 p2p->wfd_assoc_bssid = NULL;
4962
4963         return 0;
4964 }
4965
4966
4967 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4968                                   const struct wpabuf *elem)
4969 {
4970         wpabuf_free(p2p->wfd_coupled_sink_info);
4971         if (elem) {
4972                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4973                 if (p2p->wfd_coupled_sink_info == NULL)
4974                         return -1;
4975         } else
4976                 p2p->wfd_coupled_sink_info = NULL;
4977
4978         return 0;
4979 }
4980
4981 #endif /* CONFIG_WIFI_DISPLAY */
4982
4983
4984 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4985                      int max_disc_tu)
4986 {
4987         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4988                 return -1;
4989
4990         p2p->min_disc_int = min_disc_int;
4991         p2p->max_disc_int = max_disc_int;
4992         p2p->max_disc_tu = max_disc_tu;
4993         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4994                 min_disc_int, max_disc_int, max_disc_tu);
4995
4996         return 0;
4997 }
4998
4999
5000 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
5001 {
5002         va_list ap;
5003         char buf[500];
5004
5005         if (!p2p->cfg->debug_print)
5006                 return;
5007
5008         va_start(ap, fmt);
5009         vsnprintf(buf, sizeof(buf), fmt, ap);
5010         buf[sizeof(buf) - 1] = '\0';
5011         va_end(ap);
5012         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
5013 }
5014
5015
5016 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
5017 {
5018         va_list ap;
5019         char buf[500];
5020
5021         if (!p2p->cfg->debug_print)
5022                 return;
5023
5024         va_start(ap, fmt);
5025         vsnprintf(buf, sizeof(buf), fmt, ap);
5026         buf[sizeof(buf) - 1] = '\0';
5027         va_end(ap);
5028         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
5029 }
5030
5031
5032 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
5033 {
5034         va_list ap;
5035         char buf[500];
5036
5037         if (!p2p->cfg->debug_print)
5038                 return;
5039
5040         va_start(ap, fmt);
5041         vsnprintf(buf, sizeof(buf), fmt, ap);
5042         buf[sizeof(buf) - 1] = '\0';
5043         va_end(ap);
5044         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
5045 }
5046
5047
5048 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5049                              void (*peer_callback)(struct p2p_peer_info *peer,
5050                                                    void *user_data),
5051                              void *user_data)
5052 {
5053         struct p2p_device *dev, *n;
5054
5055         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5056                 peer_callback(&dev->info, user_data);
5057         }
5058 }
5059
5060
5061 #ifdef CONFIG_WPS_NFC
5062
5063 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5064                                               int client_freq,
5065                                               const u8 *go_dev_addr,
5066                                               const u8 *ssid, size_t ssid_len)
5067 {
5068         struct wpabuf *buf;
5069         u8 op_class, channel;
5070         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5071
5072         buf = wpabuf_alloc(1000);
5073         if (buf == NULL)
5074                 return NULL;
5075
5076         op_class = p2p->cfg->reg_class;
5077         channel = p2p->cfg->channel;
5078
5079         p2p_buf_add_capability(buf, p2p->dev_capab &
5080                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5081         p2p_buf_add_device_info(buf, p2p, NULL);
5082
5083         if (p2p->num_groups > 0) {
5084                 int freq = p2p_group_get_freq(p2p->groups[0]);
5085                 role = P2P_GO_IN_A_GROUP;
5086                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5087                         p2p_dbg(p2p,
5088                                 "Unknown GO operating frequency %d MHz for NFC handover",
5089                                 freq);
5090                         wpabuf_free(buf);
5091                         return NULL;
5092                 }
5093         } else if (client_freq > 0) {
5094                 role = P2P_CLIENT_IN_A_GROUP;
5095                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5096                         p2p_dbg(p2p,
5097                                 "Unknown client operating frequency %d MHz for NFC handover",
5098                                 client_freq);
5099                         wpabuf_free(buf);
5100                         return NULL;
5101                 }
5102         }
5103
5104         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5105                                        channel, role);
5106
5107         if (p2p->num_groups > 0) {
5108                 /* Limit number of clients to avoid very long message */
5109                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5110                 p2p_group_buf_add_id(p2p->groups[0], buf);
5111         } else if (client_freq > 0 &&
5112                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5113                    ssid && ssid_len > 0) {
5114                 /*
5115                  * Add the optional P2P Group ID to indicate in which group this
5116                  * device is a P2P Client.
5117                  */
5118                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5119         }
5120
5121         return buf;
5122 }
5123
5124
5125 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5126                                            int client_freq,
5127                                            const u8 *go_dev_addr,
5128                                            const u8 *ssid, size_t ssid_len)
5129 {
5130         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5131                                       ssid_len);
5132 }
5133
5134
5135 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5136                                            int client_freq,
5137                                            const u8 *go_dev_addr,
5138                                            const u8 *ssid, size_t ssid_len)
5139 {
5140         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5141                                       ssid_len);
5142 }
5143
5144
5145 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5146                                         struct p2p_nfc_params *params)
5147 {
5148         struct p2p_message msg;
5149         struct p2p_device *dev;
5150         const u8 *p2p_dev_addr;
5151         int freq;
5152         enum p2p_role_indication role;
5153
5154         params->next_step = NO_ACTION;
5155
5156         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5157                                    params->p2p_attr, params->p2p_len, &msg)) {
5158                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5159                 p2p_parse_free(&msg);
5160                 return -1;
5161         }
5162
5163         if (msg.p2p_device_addr)
5164                 p2p_dev_addr = msg.p2p_device_addr;
5165         else if (msg.device_id)
5166                 p2p_dev_addr = msg.device_id;
5167         else {
5168                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5169                 p2p_parse_free(&msg);
5170                 return -1;
5171         }
5172
5173         if (msg.oob_dev_password) {
5174                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5175                           msg.oob_dev_password_len);
5176                 params->oob_dev_pw_len = msg.oob_dev_password_len;
5177         }
5178
5179         dev = p2p_create_device(p2p, p2p_dev_addr);
5180         if (dev == NULL) {
5181                 p2p_parse_free(&msg);
5182                 return -1;
5183         }
5184
5185         params->peer = &dev->info;
5186
5187         os_get_reltime(&dev->last_seen);
5188         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5189         p2p_copy_wps_info(p2p, dev, 0, &msg);
5190
5191         if (!msg.oob_go_neg_channel) {
5192                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5193                 return -1;
5194         }
5195
5196         if (msg.oob_go_neg_channel[3] == 0 &&
5197             msg.oob_go_neg_channel[4] == 0)
5198                 freq = 0;
5199         else
5200                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5201                                            msg.oob_go_neg_channel[4]);
5202         if (freq < 0) {
5203                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5204                 return -1;
5205         }
5206         role = msg.oob_go_neg_channel[5];
5207
5208         if (role == P2P_GO_IN_A_GROUP) {
5209                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5210                 params->go_freq = freq;
5211         } else if (role == P2P_CLIENT_IN_A_GROUP) {
5212                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5213                         freq);
5214                 params->go_freq = freq;
5215         } else
5216                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5217         dev->oob_go_neg_freq = freq;
5218
5219         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5220                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5221                                            p2p->cfg->channel);
5222                 if (freq < 0) {
5223                         p2p_dbg(p2p, "Own listen channel not known");
5224                         return -1;
5225                 }
5226                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5227                 dev->oob_go_neg_freq = freq;
5228         }
5229
5230         if (msg.group_id) {
5231                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5232                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5233                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5234                           params->go_ssid_len);
5235         }
5236
5237         if (dev->flags & P2P_DEV_USER_REJECTED) {
5238                 p2p_dbg(p2p, "Do not report rejected device");
5239                 p2p_parse_free(&msg);
5240                 return 0;
5241         }
5242
5243         if (!(dev->flags & P2P_DEV_REPORTED)) {
5244                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5245                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
5246                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5247         }
5248         p2p_parse_free(&msg);
5249
5250         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5251                 params->next_step = BOTH_GO;
5252         else if (role == P2P_GO_IN_A_GROUP)
5253                 params->next_step = JOIN_GROUP;
5254         else if (role == P2P_CLIENT_IN_A_GROUP) {
5255                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5256                 params->next_step = PEER_CLIENT;
5257         } else if (p2p->num_groups > 0)
5258                 params->next_step = AUTH_JOIN;
5259         else if (params->sel)
5260                 params->next_step = INIT_GO_NEG;
5261         else
5262                 params->next_step = RESP_GO_NEG;
5263
5264         return 0;
5265 }
5266
5267
5268 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5269                                       int go_intent,
5270                                       const u8 *own_interface_addr)
5271 {
5272
5273         p2p->authorized_oob_dev_pw_id = dev_pw_id;
5274         if (dev_pw_id == 0) {
5275                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5276                 return;
5277         }
5278
5279         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5280                 dev_pw_id);
5281
5282         p2p->go_intent = go_intent;
5283         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5284 }
5285
5286 #endif /* CONFIG_WPS_NFC */
5287
5288
5289 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5290 {
5291         if (len < 8 || len > 63)
5292                 return -1;
5293         p2p->cfg->passphrase_len = len;
5294         return 0;
5295 }
5296
5297
5298 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5299 {
5300         p2p->vendor_elem = vendor_elem;
5301 }
5302
5303
5304 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5305 {
5306         struct p2p_data *p2p = eloop_ctx;
5307
5308         p2p_dbg(p2p,
5309                 "Timeout on waiting peer to become ready for GO Negotiation");
5310         p2p_go_neg_failed(p2p, -1);
5311 }