src/p2p/p2p.c

   1 /*
   2  * Wi-Fi Direct - P2P module
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "wps/wps_i.h"
  16 #include "p2p_i.h"
  17 #include "p2p.h"
  18
  19
  20 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  21 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  22 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  23                                      const u8 *sa, const u8 *data, size_t len,
  24                                      int rx_freq);
  25 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  26                                       const u8 *sa, const u8 *data,
  27                                       size_t len);
  28 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  29 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  30
  31
  32 /*
  33  * p2p_scan recovery timeout
  34  *
  35  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  36  * timeout for this to avoid hitting P2P timeout unnecessarily.
  37  */
  38 #define P2P_SCAN_TIMEOUT 35
  39
  40 /**
  41  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  42  * entries will be removed
  43  */
  44 #ifndef P2P_PEER_EXPIRATION_AGE
  45 #define P2P_PEER_EXPIRATION_AGE 60
  46 #endif /* P2P_PEER_EXPIRATION_AGE */
  47
  48 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  49
  50 static void p2p_expire_peers(struct p2p_data *p2p)
  51 {
  52         struct p2p_device *dev, *n;
  53         struct os_reltime now;
  54         size_t i;
  55
  56         os_get_reltime(&now);
  57         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  58                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  59                         continue;
  60
  61                 if (dev == p2p->go_neg_peer) {
  62                         /*
  63                          * GO Negotiation is in progress with the peer, so
  64                          * don't expire the peer entry until GO Negotiation
  65                          * fails or times out.
  66                          */
  67                         continue;
  68                 }
  69
  70                 if (p2p->cfg->go_connected &&
  71                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  72                                            dev->info.p2p_device_addr)) {
  73                         /*
  74                          * We are connected as a client to a group in which the
  75                          * peer is the GO, so do not expire the peer entry.
  76                          */
  77                         os_get_reltime(&dev->last_seen);
  78                         continue;
  79                 }
  80
  81                 for (i = 0; i < p2p->num_groups; i++) {
  82                         if (p2p_group_is_client_connected(
  83                                     p2p->groups[i], dev->info.p2p_device_addr))
  84                                 break;
  85                 }
  86                 if (i < p2p->num_groups) {
  87                         /*
  88                          * The peer is connected as a client in a group where
  89                          * we are the GO, so do not expire the peer entry.
  90                          */
  91                         os_get_reltime(&dev->last_seen);
  92                         continue;
  93                 }
  94
  95                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  96                         MAC2STR(dev->info.p2p_device_addr));
  97                 dl_list_del(&dev->list);
  98                 p2p_device_free(p2p, dev);
  99         }
 100 }
 101
 102
 103 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
 104 {
 105         struct p2p_data *p2p = eloop_ctx;
 106         p2p_expire_peers(p2p);
 107         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
 108                                p2p_expiration_timeout, p2p, NULL);
 109 }
 110
 111
 112 static const char * p2p_state_txt(int state)
 113 {
 114         switch (state) {
 115         case P2P_IDLE:
 116                 return "IDLE";
 117         case P2P_SEARCH:
 118                 return "SEARCH";
 119         case P2P_CONNECT:
 120                 return "CONNECT";
 121         case P2P_CONNECT_LISTEN:
 122                 return "CONNECT_LISTEN";
 123         case P2P_GO_NEG:
 124                 return "GO_NEG";
 125         case P2P_LISTEN_ONLY:
 126                 return "LISTEN_ONLY";
 127         case P2P_WAIT_PEER_CONNECT:
 128                 return "WAIT_PEER_CONNECT";
 129         case P2P_WAIT_PEER_IDLE:
 130                 return "WAIT_PEER_IDLE";
 131         case P2P_SD_DURING_FIND:
 132                 return "SD_DURING_FIND";
 133         case P2P_PROVISIONING:
 134                 return "PROVISIONING";
 135         case P2P_PD_DURING_FIND:
 136                 return "PD_DURING_FIND";
 137         case P2P_INVITE:
 138                 return "INVITE";
 139         case P2P_INVITE_LISTEN:
 140                 return "INVITE_LISTEN";
 141         default:
 142                 return "?";
 143         }
 144 }
 145
 146
 147 const char * p2p_get_state_txt(struct p2p_data *p2p)
 148 {
 149         return p2p_state_txt(p2p->state);
 150 }
 151
 152
 153 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 154 {
 155         struct p2p_device *dev = NULL;
 156
 157         if (!addr || !p2p)
 158                 return 0;
 159
 160         dev = p2p_get_device(p2p, addr);
 161         if (dev)
 162                 return dev->wps_prov_info;
 163         else
 164                 return 0;
 165 }
 166
 167
 168 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 169 {
 170         struct p2p_device *dev = NULL;
 171
 172         if (!addr || !p2p)
 173                 return;
 174
 175         dev = p2p_get_device(p2p, addr);
 176         if (dev)
 177                 dev->wps_prov_info = 0;
 178 }
 179
 180
 181 void p2p_set_state(struct p2p_data *p2p, int new_state)
 182 {
 183         p2p_dbg(p2p, "State %s -> %s",
 184                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 185         p2p->state = new_state;
 186 }
 187
 188
 189 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 190 {
 191         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 192                 p2p_state_txt(p2p->state), sec, usec);
 193         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 194         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 195 }
 196
 197
 198 void p2p_clear_timeout(struct p2p_data *p2p)
 199 {
 200         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 201         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 202 }
 203
 204
 205 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
 206                        int status)
 207 {
 208         struct p2p_go_neg_results res;
 209         p2p_clear_timeout(p2p);
 210         p2p_set_state(p2p, P2P_IDLE);
 211         if (p2p->go_neg_peer) {
 212                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 213                 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
 214                 p2p->go_neg_peer->oob_pw_id = 0;
 215         }
 216         p2p->go_neg_peer = NULL;
 217
 218         os_memset(&res, 0, sizeof(res));
 219         res.status = status;
 220         if (peer) {
 221                 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
 222                           ETH_ALEN);
 223                 os_memcpy(res.peer_interface_addr, peer->intended_addr,
 224                           ETH_ALEN);
 225         }
 226         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 227 }
 228
 229
 230 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 231 {
 232         unsigned int r, tu;
 233         int freq;
 234         struct wpabuf *ies;
 235
 236         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 237                 p2p_state_txt(p2p->state));
 238
 239         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 240         if (freq < 0) {
 241                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 242                 return;
 243         }
 244
 245         os_get_random((u8 *) &r, sizeof(r));
 246         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 247               p2p->min_disc_int) * 100;
 248         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 249                 tu = p2p->max_disc_tu;
 250         if (!dev_disc && tu < 100)
 251                 tu = 100; /* Need to wait in non-device discovery use cases */
 252         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 253                 tu = p2p->cfg->max_listen * 1000 / 1024;
 254
 255         if (tu == 0) {
 256                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 257                 p2p_set_timeout(p2p, 0, 0);
 258                 return;
 259         }
 260
 261         p2p->pending_listen_freq = freq;
 262         p2p->pending_listen_sec = 0;
 263         p2p->pending_listen_usec = 1024 * tu;
 264
 265         ies = p2p_build_probe_resp_ies(p2p);
 266         if (ies == NULL)
 267                 return;
 268
 269         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 270                     ies) < 0) {
 271                 p2p_dbg(p2p, "Failed to start listen mode");
 272                 p2p->pending_listen_freq = 0;
 273         }
 274         wpabuf_free(ies);
 275 }
 276
 277
 278 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 279 {
 280         int freq;
 281         struct wpabuf *ies;
 282
 283         p2p_dbg(p2p, "Going to listen(only) state");
 284
 285         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 286         if (freq < 0) {
 287                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 288                 return -1;
 289         }
 290
 291         p2p->pending_listen_freq = freq;
 292         p2p->pending_listen_sec = timeout / 1000;
 293         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 294
 295         if (p2p->p2p_scan_running) {
 296                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 297                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 298                         return 0;
 299                 }
 300                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 301                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 302                 return 0;
 303         }
 304
 305         ies = p2p_build_probe_resp_ies(p2p);
 306         if (ies == NULL)
 307                 return -1;
 308
 309         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 310                 p2p_dbg(p2p, "Failed to start listen mode");
 311                 p2p->pending_listen_freq = 0;
 312                 wpabuf_free(ies);
 313                 return -1;
 314         }
 315         wpabuf_free(ies);
 316
 317         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 318
 319         return 0;
 320 }
 321
 322
 323 static void p2p_device_clear_reported(struct p2p_data *p2p)
 324 {
 325         struct p2p_device *dev;
 326         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
 327                 dev->flags &= ~P2P_DEV_REPORTED;
 328 }
 329
 330
 331 /**
 332  * p2p_get_device - Fetch a peer entry
 333  * @p2p: P2P module context from p2p_init()
 334  * @addr: P2P Device Address of the peer
 335  * Returns: Pointer to the device entry or %NULL if not found
 336  */
 337 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 338 {
 339         struct p2p_device *dev;
 340         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 341                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 342                         return dev;
 343         }
 344         return NULL;
 345 }
 346
 347
 348 /**
 349  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 350  * @p2p: P2P module context from p2p_init()
 351  * @addr: P2P Interface Address of the peer
 352  * Returns: Pointer to the device entry or %NULL if not found
 353  */
 354 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 355                                              const u8 *addr)
 356 {
 357         struct p2p_device *dev;
 358         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 359                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 360                         return dev;
 361         }
 362         return NULL;
 363 }
 364
 365
 366 /**
 367  * p2p_create_device - Create a peer entry
 368  * @p2p: P2P module context from p2p_init()
 369  * @addr: P2P Device Address of the peer
 370  * Returns: Pointer to the device entry or %NULL on failure
 371  *
 372  * If there is already an entry for the peer, it will be returned instead of
 373  * creating a new one.
 374  */
 375 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 376                                              const u8 *addr)
 377 {
 378         struct p2p_device *dev, *oldest = NULL;
 379         size_t count = 0;
 380
 381         dev = p2p_get_device(p2p, addr);
 382         if (dev)
 383                 return dev;
 384
 385         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 386                 count++;
 387                 if (oldest == NULL ||
 388                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 389                         oldest = dev;
 390         }
 391         if (count + 1 > p2p->cfg->max_peers && oldest) {
 392                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 393                 dl_list_del(&oldest->list);
 394                 p2p_device_free(p2p, oldest);
 395         }
 396
 397         dev = os_zalloc(sizeof(*dev));
 398         if (dev == NULL)
 399                 return NULL;
 400         dl_list_add(&p2p->devices, &dev->list);
 401         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 402
 403         return dev;
 404 }
 405
 406
 407 static void p2p_copy_client_info(struct p2p_device *dev,
 408                                  struct p2p_client_info *cli)
 409 {
 410         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 411         dev->info.device_name[cli->dev_name_len] = '\0';
 412         dev->info.dev_capab = cli->dev_capab;
 413         dev->info.config_methods = cli->config_methods;
 414         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 415         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 416         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 417                   dev->info.wps_sec_dev_type_list_len);
 418 }
 419
 420
 421 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 422                                  const u8 *go_interface_addr, int freq,
 423                                  const u8 *gi, size_t gi_len)
 424 {
 425         struct p2p_group_info info;
 426         size_t c;
 427         struct p2p_device *dev;
 428
 429         if (gi == NULL)
 430                 return 0;
 431
 432         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 433                 return -1;
 434
 435         /*
 436          * Clear old data for this group; if the devices are still in the
 437          * group, the information will be restored in the loop following this.
 438          */
 439         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 440                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 441                               ETH_ALEN) == 0) {
 442                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 443                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 444                 }
 445         }
 446
 447         for (c = 0; c < info.num_clients; c++) {
 448                 struct p2p_client_info *cli = &info.client[c];
 449                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 450                               ETH_ALEN) == 0)
 451                         continue; /* ignore our own entry */
 452                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 453                 if (dev) {
 454                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 455                                           P2P_DEV_PROBE_REQ_ONLY)) {
 456                                 /*
 457                                  * Update information since we have not
 458                                  * received this directly from the client.
 459                                  */
 460                                 p2p_copy_client_info(dev, cli);
 461                         } else {
 462                                 /*
 463                                  * Need to update P2P Client Discoverability
 464                                  * flag since it is valid only in P2P Group
 465                                  * Info attribute.
 466                                  */
 467                                 dev->info.dev_capab &=
 468                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 469                                 dev->info.dev_capab |=
 470                                         cli->dev_capab &
 471                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 472                         }
 473                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 474                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 475                         }
 476                 } else {
 477                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 478                         if (dev == NULL)
 479                                 continue;
 480                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 481                         p2p_copy_client_info(dev, cli);
 482                         dev->oper_freq = freq;
 483                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 484                                             dev->info.p2p_device_addr,
 485                                             &dev->info, 1);
 486                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 487                 }
 488
 489                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 490                           ETH_ALEN);
 491                 os_get_reltime(&dev->last_seen);
 492                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 493                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 494                           ETH_ALEN);
 495         }
 496
 497         return 0;
 498 }
 499
 500
 501 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 502                               int probe_req, const struct p2p_message *msg)
 503 {
 504         os_memcpy(dev->info.device_name, msg->device_name,
 505                   sizeof(dev->info.device_name));
 506
 507         if (msg->manufacturer &&
 508             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 509                 os_memset(dev->info.manufacturer, 0,
 510                           sizeof(dev->info.manufacturer));
 511                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 512                           msg->manufacturer_len);
 513         }
 514
 515         if (msg->model_name &&
 516             msg->model_name_len < sizeof(dev->info.model_name)) {
 517                 os_memset(dev->info.model_name, 0,
 518                           sizeof(dev->info.model_name));
 519                 os_memcpy(dev->info.model_name, msg->model_name,
 520                           msg->model_name_len);
 521         }
 522
 523         if (msg->model_number &&
 524             msg->model_number_len < sizeof(dev->info.model_number)) {
 525                 os_memset(dev->info.model_number, 0,
 526                           sizeof(dev->info.model_number));
 527                 os_memcpy(dev->info.model_number, msg->model_number,
 528                           msg->model_number_len);
 529         }
 530
 531         if (msg->serial_number &&
 532             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 533                 os_memset(dev->info.serial_number, 0,
 534                           sizeof(dev->info.serial_number));
 535                 os_memcpy(dev->info.serial_number, msg->serial_number,
 536                           msg->serial_number_len);
 537         }
 538
 539         if (msg->pri_dev_type)
 540                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 541                           sizeof(dev->info.pri_dev_type));
 542         else if (msg->wps_pri_dev_type)
 543                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 544                           sizeof(dev->info.pri_dev_type));
 545
 546         if (msg->wps_sec_dev_type_list) {
 547                 os_memcpy(dev->info.wps_sec_dev_type_list,
 548                           msg->wps_sec_dev_type_list,
 549                           msg->wps_sec_dev_type_list_len);
 550                 dev->info.wps_sec_dev_type_list_len =
 551                         msg->wps_sec_dev_type_list_len;
 552         }
 553
 554         if (msg->capability) {
 555                 /*
 556                  * P2P Client Discoverability bit is reserved in all frames
 557                  * that use this function, so do not change its value here.
 558                  */
 559                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 560                 dev->info.dev_capab |= msg->capability[0] &
 561                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 562                 dev->info.group_capab = msg->capability[1];
 563         }
 564
 565         if (msg->ext_listen_timing) {
 566                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 567                 dev->ext_listen_interval =
 568                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 569         }
 570
 571         if (!probe_req) {
 572                 u16 new_config_methods;
 573                 new_config_methods = msg->config_methods ?
 574                         msg->config_methods : msg->wps_config_methods;
 575                 if (new_config_methods &&
 576                     dev->info.config_methods != new_config_methods) {
 577                         p2p_dbg(p2p, "Update peer " MACSTR
 578                                 " config_methods 0x%x -> 0x%x",
 579                                 MAC2STR(dev->info.p2p_device_addr),
 580                                 dev->info.config_methods,
 581                                 new_config_methods);
 582                         dev->info.config_methods = new_config_methods;
 583                 }
 584         }
 585 }
 586
 587
 588 /**
 589  * p2p_add_device - Add peer entries based on scan results or P2P frames
 590  * @p2p: P2P module context from p2p_init()
 591  * @addr: Source address of Beacon or Probe Response frame (may be either
 592  *      P2P Device Address or P2P Interface Address)
 593  * @level: Signal level (signal strength of the received frame from the peer)
 594  * @freq: Frequency on which the Beacon or Probe Response frame was received
 595  * @rx_time: Time when the result was received
 596  * @ies: IEs from the Beacon or Probe Response frame
 597  * @ies_len: Length of ies buffer in octets
 598  * @scan_res: Whether this was based on scan results
 599  * Returns: 0 on success, -1 on failure
 600  *
 601  * If the scan result is for a GO, the clients in the group will also be added
 602  * to the peer table. This function can also be used with some other frames
 603  * like Provision Discovery Request that contains P2P Capability and P2P Device
 604  * Info attributes.
 605  */
 606 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 607                    struct os_reltime *rx_time, int level, const u8 *ies,
 608                    size_t ies_len, int scan_res)
 609 {
 610         struct p2p_device *dev;
 611         struct p2p_message msg;
 612         const u8 *p2p_dev_addr;
 613         int i;
 614         struct os_reltime time_now;
 615
 616         os_memset(&msg, 0, sizeof(msg));
 617         if (p2p_parse_ies(ies, ies_len, &msg)) {
 618                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 619                 p2p_parse_free(&msg);
 620                 return -1;
 621         }
 622
 623         if (msg.p2p_device_addr)
 624                 p2p_dev_addr = msg.p2p_device_addr;
 625         else if (msg.device_id)
 626                 p2p_dev_addr = msg.device_id;
 627         else {
 628                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 629                 p2p_parse_free(&msg);
 630                 return -1;
 631         }
 632
 633         if (!is_zero_ether_addr(p2p->peer_filter) &&
 634             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 635                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 636                         " due to peer filter", MAC2STR(p2p_dev_addr));
 637                 p2p_parse_free(&msg);
 638                 return 0;
 639         }
 640
 641         dev = p2p_create_device(p2p, p2p_dev_addr);
 642         if (dev == NULL) {
 643                 p2p_parse_free(&msg);
 644                 return -1;
 645         }
 646
 647         if (rx_time == NULL) {
 648                 os_get_reltime(&time_now);
 649                 rx_time = &time_now;
 650         }
 651
 652         /*
 653          * Update the device entry only if the new peer
 654          * entry is newer than the one previously stored.
 655          */
 656         if (dev->last_seen.sec > 0 &&
 657             os_reltime_before(rx_time, &dev->last_seen)) {
 658                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 659                         (unsigned int) rx_time->sec,
 660                         (unsigned int) rx_time->usec,
 661                         (unsigned int) dev->last_seen.sec,
 662                         (unsigned int) dev->last_seen.usec);
 663                 p2p_parse_free(&msg);
 664                 return -1;
 665         }
 666
 667         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 668
 669         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 670
 671         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 672                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 673         if (msg.ssid &&
 674             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 675              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 676              != 0)) {
 677                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 678                 dev->oper_ssid_len = msg.ssid[1];
 679         }
 680
 681         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 682             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 683                 int ds_freq;
 684                 if (*msg.ds_params == 14)
 685                         ds_freq = 2484;
 686                 else
 687                         ds_freq = 2407 + *msg.ds_params * 5;
 688                 if (freq != ds_freq) {
 689                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 690                                 freq, ds_freq);
 691                         freq = ds_freq;
 692                 }
 693         }
 694
 695         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 696                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 697                         MACSTR " %d -> %d MHz (DS param %d)",
 698                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 699                         freq, msg.ds_params ? *msg.ds_params : -1);
 700         }
 701         if (scan_res) {
 702                 dev->listen_freq = freq;
 703                 if (msg.group_info)
 704                         dev->oper_freq = freq;
 705         }
 706         dev->info.level = level;
 707
 708         p2p_copy_wps_info(p2p, dev, 0, &msg);
 709
 710         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 711                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 712                 dev->info.wps_vendor_ext[i] = NULL;
 713         }
 714
 715         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 716                 if (msg.wps_vendor_ext[i] == NULL)
 717                         break;
 718                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 719                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 720                 if (dev->info.wps_vendor_ext[i] == NULL)
 721                         break;
 722         }
 723
 724         if (msg.wfd_subelems) {
 725                 wpabuf_free(dev->info.wfd_subelems);
 726                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 727         }
 728
 729         if (scan_res) {
 730                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 731                                       msg.group_info, msg.group_info_len);
 732         }
 733
 734         p2p_parse_free(&msg);
 735
 736         if (dev->flags & P2P_DEV_REPORTED)
 737                 return 0;
 738
 739         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 740                 freq, (unsigned int) rx_time->sec,
 741                 (unsigned int) rx_time->usec);
 742         if (dev->flags & P2P_DEV_USER_REJECTED) {
 743                 p2p_dbg(p2p, "Do not report rejected device");
 744                 return 0;
 745         }
 746
 747         if (dev->info.config_methods == 0 &&
 748             (freq == 2412 || freq == 2437 || freq == 2462)) {
 749                 /*
 750                  * If we have only seen a Beacon frame from a GO, we do not yet
 751                  * know what WPS config methods it supports. Since some
 752                  * applications use config_methods value from P2P-DEVICE-FOUND
 753                  * events, postpone reporting this peer until we've fully
 754                  * discovered its capabilities.
 755                  *
 756                  * At least for now, do this only if the peer was detected on
 757                  * one of the social channels since that peer can be easily be
 758                  * found again and there are no limitations of having to use
 759                  * passive scan on this channels, so this can be done through
 760                  * Probe Response frame that includes the config_methods
 761                  * information.
 762                  */
 763                 p2p_dbg(p2p, "Do not report peer " MACSTR
 764                         " with unknown config methods", MAC2STR(addr));
 765                 return 0;
 766         }
 767
 768         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 769                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 770         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 771
 772         return 0;
 773 }
 774
 775
 776 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 777 {
 778         int i;
 779
 780         if (p2p->go_neg_peer == dev) {
 781                 /*
 782                  * If GO Negotiation is in progress, report that it has failed.
 783                  */
 784                 p2p_go_neg_failed(p2p, dev, -1);
 785                 p2p->go_neg_peer = NULL;
 786         }
 787         if (p2p->invite_peer == dev)
 788                 p2p->invite_peer = NULL;
 789         if (p2p->sd_peer == dev)
 790                 p2p->sd_peer = NULL;
 791         if (p2p->pending_client_disc_go == dev)
 792                 p2p->pending_client_disc_go = NULL;
 793
 794         /* dev_lost() device, but only if it was previously dev_found() */
 795         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 796                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 797                                    dev->info.p2p_device_addr);
 798
 799         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 800                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 801                 dev->info.wps_vendor_ext[i] = NULL;
 802         }
 803
 804         wpabuf_free(dev->info.wfd_subelems);
 805
 806         os_free(dev);
 807 }
 808
 809
 810 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 811 {
 812         struct p2p_channels *c;
 813         struct p2p_reg_class *cla;
 814         size_t cl, ch;
 815         int found = 0;
 816         u8 reg_class;
 817         u8 channel;
 818         int freq;
 819
 820         c = &p2p->cfg->channels;
 821         for (cl = 0; cl < c->reg_classes; cl++) {
 822                 cla = &c->reg_class[cl];
 823                 if (cla->reg_class != p2p->last_prog_scan_class)
 824                         continue;
 825                 for (ch = 0; ch < cla->channels; ch++) {
 826                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 827                                 found = 1;
 828                                 break;
 829                         }
 830                 }
 831                 if (found)
 832                         break;
 833         }
 834
 835         if (!found) {
 836                 /* Start from beginning */
 837                 reg_class = c->reg_class[0].reg_class;
 838                 channel = c->reg_class[0].channel[0];
 839         } else {
 840                 /* Pick the next channel */
 841                 ch++;
 842                 if (ch == cla->channels) {
 843                         cl++;
 844                         if (cl == c->reg_classes)
 845                                 cl = 0;
 846                         ch = 0;
 847                 }
 848                 reg_class = c->reg_class[cl].reg_class;
 849                 channel = c->reg_class[cl].channel[ch];
 850         }
 851
 852         freq = p2p_channel_to_freq(reg_class, channel);
 853         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 854                 reg_class, channel, freq);
 855         p2p->last_prog_scan_class = reg_class;
 856         p2p->last_prog_scan_chan = channel;
 857
 858         if (freq == 2412 || freq == 2437 || freq == 2462)
 859                 return 0; /* No need to add social channels */
 860         return freq;
 861 }
 862
 863
 864 static void p2p_search(struct p2p_data *p2p)
 865 {
 866         int freq = 0;
 867         enum p2p_scan_type type;
 868         u16 pw_id = DEV_PW_DEFAULT;
 869         int res;
 870
 871         if (p2p->drv_in_listen) {
 872                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 873                 return;
 874         }
 875         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 876
 877         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 878             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 879                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 880                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 881         } else {
 882                 type = P2P_SCAN_SOCIAL;
 883                 p2p_dbg(p2p, "Starting search");
 884         }
 885
 886         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
 887                                  p2p->num_req_dev_types, p2p->req_dev_types,
 888                                  p2p->find_dev_id, pw_id);
 889         if (res < 0) {
 890                 p2p_dbg(p2p, "Scan request failed");
 891                 p2p_continue_find(p2p);
 892         } else {
 893                 p2p_dbg(p2p, "Running p2p_scan");
 894                 p2p->p2p_scan_running = 1;
 895                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
 896                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
 897                                        p2p, NULL);
 898         }
 899 }
 900
 901
 902 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
 903 {
 904         struct p2p_data *p2p = eloop_ctx;
 905         p2p_dbg(p2p, "Find timeout -> stop");
 906         p2p_stop_find(p2p);
 907 }
 908
 909
 910 static int p2p_run_after_scan(struct p2p_data *p2p)
 911 {
 912         struct p2p_device *dev;
 913         enum p2p_after_scan op;
 914
 915         if (p2p->after_scan_tx) {
 916                 p2p->after_scan_tx_in_progress = 1;
 917                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
 918                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
 919                                       p2p->after_scan_tx->freq,
 920                                       p2p->after_scan_tx->dst,
 921                                       p2p->after_scan_tx->src,
 922                                       p2p->after_scan_tx->bssid,
 923                                       (u8 *) (p2p->after_scan_tx + 1),
 924                                       p2p->after_scan_tx->len,
 925                                       p2p->after_scan_tx->wait_time);
 926                 os_free(p2p->after_scan_tx);
 927                 p2p->after_scan_tx = NULL;
 928                 return 1;
 929         }
 930
 931         op = p2p->start_after_scan;
 932         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
 933         switch (op) {
 934         case P2P_AFTER_SCAN_NOTHING:
 935                 break;
 936         case P2P_AFTER_SCAN_LISTEN:
 937                 p2p_dbg(p2p, "Start previously requested Listen state");
 938                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
 939                            p2p->pending_listen_usec / 1000);
 940                 return 1;
 941         case P2P_AFTER_SCAN_CONNECT:
 942                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
 943                         MAC2STR(p2p->after_scan_peer));
 944                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
 945                 if (dev == NULL) {
 946                         p2p_dbg(p2p, "Peer not known anymore");
 947                         break;
 948                 }
 949                 p2p_connect_send(p2p, dev);
 950                 return 1;
 951         }
 952
 953         return 0;
 954 }
 955
 956
 957 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 958 {
 959         struct p2p_data *p2p = eloop_ctx;
 960         int running;
 961         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
 962         running = p2p->p2p_scan_running;
 963         /* Make sure we recover from missed scan results callback */
 964         p2p->p2p_scan_running = 0;
 965
 966         if (running)
 967                 p2p_run_after_scan(p2p);
 968 }
 969
 970
 971 static void p2p_free_req_dev_types(struct p2p_data *p2p)
 972 {
 973         p2p->num_req_dev_types = 0;
 974         os_free(p2p->req_dev_types);
 975         p2p->req_dev_types = NULL;
 976 }
 977
 978
 979 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
 980              enum p2p_discovery_type type,
 981              unsigned int num_req_dev_types, const u8 *req_dev_types,
 982              const u8 *dev_id, unsigned int search_delay)
 983 {
 984         int res;
 985
 986         p2p_dbg(p2p, "Starting find (type=%d)", type);
 987         os_get_reltime(&p2p->find_start);
 988         if (p2p->p2p_scan_running) {
 989                 p2p_dbg(p2p, "p2p_scan is already running");
 990         }
 991
 992         p2p_free_req_dev_types(p2p);
 993         if (req_dev_types && num_req_dev_types) {
 994                 p2p->req_dev_types = os_malloc(num_req_dev_types *
 995                                                WPS_DEV_TYPE_LEN);
 996                 if (p2p->req_dev_types == NULL)
 997                         return -1;
 998                 os_memcpy(p2p->req_dev_types, req_dev_types,
 999                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1000                 p2p->num_req_dev_types = num_req_dev_types;
1001         }
1002
1003         if (dev_id) {
1004                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1005                 p2p->find_dev_id = p2p->find_dev_id_buf;
1006         } else
1007                 p2p->find_dev_id = NULL;
1008
1009         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1010         p2p_clear_timeout(p2p);
1011         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1012         p2p->find_type = type;
1013         p2p_device_clear_reported(p2p);
1014         p2p_set_state(p2p, P2P_SEARCH);
1015         p2p->search_delay = search_delay;
1016         p2p->in_search_delay = 0;
1017         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1018         p2p->last_p2p_find_timeout = timeout;
1019         if (timeout)
1020                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1021                                        p2p, NULL);
1022         switch (type) {
1023         case P2P_FIND_START_WITH_FULL:
1024         case P2P_FIND_PROGRESSIVE:
1025                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1026                                          p2p->num_req_dev_types,
1027                                          p2p->req_dev_types, dev_id,
1028                                          DEV_PW_DEFAULT);
1029                 break;
1030         case P2P_FIND_ONLY_SOCIAL:
1031                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1032                                          p2p->num_req_dev_types,
1033                                          p2p->req_dev_types, dev_id,
1034                                          DEV_PW_DEFAULT);
1035                 break;
1036         default:
1037                 return -1;
1038         }
1039
1040         if (res == 0) {
1041                 p2p_dbg(p2p, "Running p2p_scan");
1042                 p2p->p2p_scan_running = 1;
1043                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1044                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1045                                        p2p, NULL);
1046         } else if (p2p->p2p_scan_running) {
1047                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1048                 /* wait for the previous p2p_scan to complete */
1049                 res = 0; /* do not report failure */
1050         } else {
1051                 p2p_dbg(p2p, "Failed to start p2p_scan");
1052                 p2p_set_state(p2p, P2P_IDLE);
1053                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1054         }
1055
1056         return res;
1057 }
1058
1059
1060 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1061 {
1062         p2p_dbg(p2p, "Stopping find");
1063         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1064         p2p_clear_timeout(p2p);
1065         if (p2p->state == P2P_SEARCH)
1066                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1067         p2p_set_state(p2p, P2P_IDLE);
1068         p2p_free_req_dev_types(p2p);
1069         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1070         if (p2p->go_neg_peer)
1071                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1072         p2p->go_neg_peer = NULL;
1073         p2p->sd_peer = NULL;
1074         p2p->invite_peer = NULL;
1075         p2p_stop_listen_for_freq(p2p, freq);
1076 }
1077
1078
1079 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1080 {
1081         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1082                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1083                 return;
1084         }
1085         if (p2p->in_listen) {
1086                 p2p->in_listen = 0;
1087                 p2p_clear_timeout(p2p);
1088         }
1089         if (p2p->drv_in_listen) {
1090                 /*
1091                  * The driver may not deliver callback to p2p_listen_end()
1092                  * when the operation gets canceled, so clear the internal
1093                  * variable that is tracking driver state.
1094                  */
1095                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1096                 p2p->drv_in_listen = 0;
1097         }
1098         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1099 }
1100
1101
1102 void p2p_stop_listen(struct p2p_data *p2p)
1103 {
1104         if (p2p->state != P2P_LISTEN_ONLY) {
1105                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1106                 return;
1107         }
1108
1109         p2p_stop_listen_for_freq(p2p, 0);
1110         p2p_set_state(p2p, P2P_IDLE);
1111 }
1112
1113
1114 void p2p_stop_find(struct p2p_data *p2p)
1115 {
1116         p2p_stop_find_for_freq(p2p, 0);
1117 }
1118
1119
1120 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1121                                     unsigned int force_freq,
1122                                     unsigned int pref_freq, int go)
1123 {
1124         u8 op_class, op_channel;
1125         unsigned int freq = force_freq ? force_freq : pref_freq;
1126
1127         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1128                 force_freq, pref_freq, go);
1129         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1130                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1131                 return -1;
1132         }
1133
1134         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1135             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1136                                           op_channel))) {
1137                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1138                         freq, op_class, op_channel);
1139                 return -1;
1140         }
1141
1142         p2p->op_reg_class = op_class;
1143         p2p->op_channel = op_channel;
1144
1145         if (force_freq) {
1146                 p2p->channels.reg_classes = 1;
1147                 p2p->channels.reg_class[0].channels = 1;
1148                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1149                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1150         } else {
1151                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1152                           sizeof(struct p2p_channels));
1153         }
1154
1155         return 0;
1156 }
1157
1158
1159 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1160 {
1161         u8 op_class, op_channel;
1162         const int op_classes_5ghz[] = { 124, 115, 0 };
1163         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1164         const int op_classes_vht[] = { 128, 0 };
1165
1166         p2p_dbg(p2p, "Prepare channel best");
1167
1168         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1169             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1170             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1171             == 0) {
1172                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1173                 p2p->op_reg_class = op_class;
1174                 p2p->op_channel = op_channel;
1175         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1176                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1177                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1178                    == 0) {
1179                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1180                 p2p->op_reg_class = op_class;
1181                 p2p->op_channel = op_channel;
1182         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1183                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1184                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1185                                        &op_channel) == 0) {
1186                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1187                 p2p->op_reg_class = op_class;
1188                 p2p->op_channel = op_channel;
1189         } else if (p2p->cfg->num_pref_chan > 0 &&
1190                    p2p_channels_includes(&p2p->cfg->channels,
1191                                          p2p->cfg->pref_chan[0].op_class,
1192                                          p2p->cfg->pref_chan[0].chan)) {
1193                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1194                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1195                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1196         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1197                                       &p2p->op_reg_class, &p2p->op_channel) ==
1198                    0) {
1199                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1200                         p2p->op_reg_class, p2p->op_channel);
1201         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1202                                       &p2p->op_reg_class, &p2p->op_channel) ==
1203                    0) {
1204                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1205                         p2p->op_reg_class, p2p->op_channel);
1206         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1207                                       &p2p->op_reg_class, &p2p->op_channel) ==
1208                    0) {
1209                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1210                         p2p->op_reg_class, p2p->op_channel);
1211         } else if (p2p_channels_includes(&p2p->cfg->channels,
1212                                          p2p->cfg->op_reg_class,
1213                                          p2p->cfg->op_channel)) {
1214                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1215                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1216                 p2p->op_channel = p2p->cfg->op_channel;
1217         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1218                                              &p2p->op_reg_class,
1219                                              &p2p->op_channel) == 0) {
1220                 p2p_dbg(p2p, "Select random available social channel %d from 2.4 GHz band as operating channel preference",
1221                         p2p->op_channel);
1222         } else {
1223                 /* Select any random available channel from the first available
1224                  * operating class */
1225                 p2p_channel_select(&p2p->cfg->channels, NULL,
1226                                    &p2p->op_reg_class,
1227                                    &p2p->op_channel);
1228                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1229                         p2p->op_channel, p2p->op_reg_class);
1230         }
1231
1232         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1233                   sizeof(struct p2p_channels));
1234 }
1235
1236
1237 /**
1238  * p2p_prepare_channel - Select operating channel for GO Negotiation
1239  * @p2p: P2P module context from p2p_init()
1240  * @dev: Selected peer device
1241  * @force_freq: Forced frequency in MHz or 0 if not forced
1242  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1243  * @go: Whether the local end will be forced to be GO
1244  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1245  *
1246  * This function is used to do initial operating channel selection for GO
1247  * Negotiation prior to having received peer information. The selected channel
1248  * may be further optimized in p2p_reselect_channel() once the peer information
1249  * is available.
1250  */
1251 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1252                         unsigned int force_freq, unsigned int pref_freq, int go)
1253 {
1254         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1255                 force_freq, pref_freq, go);
1256         if (force_freq || pref_freq) {
1257                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1258                     0)
1259                         return -1;
1260         } else {
1261                 p2p_prepare_channel_best(p2p);
1262         }
1263         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1264         if (go)
1265                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1266         else if (!force_freq)
1267                 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1268                                    &p2p->channels);
1269         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1270
1271         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1272                 p2p->op_reg_class, p2p->op_channel,
1273                 force_freq ? " (forced)" : "");
1274
1275         if (force_freq)
1276                 dev->flags |= P2P_DEV_FORCE_FREQ;
1277         else
1278                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1279
1280         return 0;
1281 }
1282
1283
1284 static void p2p_set_dev_persistent(struct p2p_device *dev,
1285                                    int persistent_group)
1286 {
1287         switch (persistent_group) {
1288         case 0:
1289                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1290                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1291                 break;
1292         case 1:
1293                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1294                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1295                 break;
1296         case 2:
1297                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1298                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1299                 break;
1300         }
1301 }
1302
1303
1304 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1305                 enum p2p_wps_method wps_method,
1306                 int go_intent, const u8 *own_interface_addr,
1307                 unsigned int force_freq, int persistent_group,
1308                 const u8 *force_ssid, size_t force_ssid_len,
1309                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1310 {
1311         struct p2p_device *dev;
1312
1313         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1314                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1315                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1316                 "oob_pw_id=%u",
1317                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1318                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1319
1320         dev = p2p_get_device(p2p, peer_addr);
1321         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1322                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1323                         MAC2STR(peer_addr));
1324                 return -1;
1325         }
1326
1327         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1328                                 go_intent == 15) < 0)
1329                 return -1;
1330
1331         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1332                 if (!(dev->info.dev_capab &
1333                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1334                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1335                                 " that is in a group and is not discoverable",
1336                                 MAC2STR(peer_addr));
1337                         return -1;
1338                 }
1339                 if (dev->oper_freq <= 0) {
1340                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1341                                 " with incomplete information",
1342                                 MAC2STR(peer_addr));
1343                         return -1;
1344                 }
1345
1346                 /*
1347                  * First, try to connect directly. If the peer does not
1348                  * acknowledge frames, assume it is sleeping and use device
1349                  * discoverability via the GO at that point.
1350                  */
1351         }
1352
1353         p2p->ssid_set = 0;
1354         if (force_ssid) {
1355                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1356                                   force_ssid, force_ssid_len);
1357                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1358                 p2p->ssid_len = force_ssid_len;
1359                 p2p->ssid_set = 1;
1360         }
1361
1362         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1363         dev->flags &= ~P2P_DEV_USER_REJECTED;
1364         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1365         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1366         if (pd_before_go_neg)
1367                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1368         else {
1369                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1370                 /*
1371                  * Assign dialog token and tie breaker here to use the same
1372                  * values in each retry within the same GO Negotiation exchange.
1373                  */
1374                 dev->dialog_token++;
1375                 if (dev->dialog_token == 0)
1376                         dev->dialog_token = 1;
1377                 dev->tie_breaker = p2p->next_tie_breaker;
1378                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1379         }
1380         dev->connect_reqs = 0;
1381         dev->go_neg_req_sent = 0;
1382         dev->go_state = UNKNOWN_GO;
1383         p2p_set_dev_persistent(dev, persistent_group);
1384         p2p->go_intent = go_intent;
1385         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1386
1387         if (p2p->state != P2P_IDLE)
1388                 p2p_stop_find(p2p);
1389
1390         if (p2p->after_scan_tx) {
1391                 /*
1392                  * We need to drop the pending frame to avoid issues with the
1393                  * new GO Negotiation, e.g., when the pending frame was from a
1394                  * previous attempt at starting a GO Negotiation.
1395                  */
1396                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1397                 os_free(p2p->after_scan_tx);
1398                 p2p->after_scan_tx = NULL;
1399         }
1400
1401         dev->wps_method = wps_method;
1402         dev->oob_pw_id = oob_pw_id;
1403         dev->status = P2P_SC_SUCCESS;
1404
1405         if (p2p->p2p_scan_running) {
1406                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1407                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1408                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1409                 return 0;
1410         }
1411         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1412
1413         return p2p_connect_send(p2p, dev);
1414 }
1415
1416
1417 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1418                   enum p2p_wps_method wps_method,
1419                   int go_intent, const u8 *own_interface_addr,
1420                   unsigned int force_freq, int persistent_group,
1421                   const u8 *force_ssid, size_t force_ssid_len,
1422                   unsigned int pref_freq, u16 oob_pw_id)
1423 {
1424         struct p2p_device *dev;
1425
1426         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1427                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1428                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1429                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1430                 wps_method, persistent_group, oob_pw_id);
1431
1432         dev = p2p_get_device(p2p, peer_addr);
1433         if (dev == NULL) {
1434                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1435                         MAC2STR(peer_addr));
1436                 return -1;
1437         }
1438
1439         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1440                                 15) < 0)
1441                 return -1;
1442
1443         p2p->ssid_set = 0;
1444         if (force_ssid) {
1445                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1446                                   force_ssid, force_ssid_len);
1447                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1448                 p2p->ssid_len = force_ssid_len;
1449                 p2p->ssid_set = 1;
1450         }
1451
1452         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1453         dev->flags &= ~P2P_DEV_USER_REJECTED;
1454         dev->go_neg_req_sent = 0;
1455         dev->go_state = UNKNOWN_GO;
1456         p2p_set_dev_persistent(dev, persistent_group);
1457         p2p->go_intent = go_intent;
1458         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1459
1460         dev->wps_method = wps_method;
1461         dev->oob_pw_id = oob_pw_id;
1462         dev->status = P2P_SC_SUCCESS;
1463
1464         return 0;
1465 }
1466
1467
1468 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1469                       struct p2p_device *dev, struct p2p_message *msg)
1470 {
1471         os_get_reltime(&dev->last_seen);
1472
1473         p2p_copy_wps_info(p2p, dev, 0, msg);
1474
1475         if (msg->listen_channel) {
1476                 int freq;
1477                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1478                                            msg->listen_channel[4]);
1479                 if (freq < 0) {
1480                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1481                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1482                                 msg->listen_channel[0],
1483                                 msg->listen_channel[1],
1484                                 msg->listen_channel[2],
1485                                 msg->listen_channel[3],
1486                                 msg->listen_channel[4]);
1487                 } else {
1488                         p2p_dbg(p2p, "Update peer " MACSTR
1489                                 " Listen channel: %u -> %u MHz",
1490                                 MAC2STR(dev->info.p2p_device_addr),
1491                                 dev->listen_freq, freq);
1492                         dev->listen_freq = freq;
1493                 }
1494         }
1495
1496         if (msg->wfd_subelems) {
1497                 wpabuf_free(dev->info.wfd_subelems);
1498                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1499         }
1500
1501         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1502                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1503                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1504         } else {
1505                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1506                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1507                         "listen_freq=%d",
1508                         MAC2STR(dev->info.p2p_device_addr),
1509                         dev->info.dev_capab, dev->info.group_capab,
1510                         dev->info.device_name, dev->listen_freq);
1511         }
1512
1513         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1514
1515         if (dev->flags & P2P_DEV_USER_REJECTED) {
1516                 p2p_dbg(p2p, "Do not report rejected device");
1517                 return;
1518         }
1519
1520         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1521                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1522         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1523 }
1524
1525
1526 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1527 {
1528         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1529         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1530         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1531                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1532         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1533 }
1534
1535
1536 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1537 {
1538         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1539         p2p_random(params->passphrase, 8);
1540         return 0;
1541 }
1542
1543
1544 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1545 {
1546         struct p2p_go_neg_results res;
1547         int go = peer->go_state == LOCAL_GO;
1548         struct p2p_channels intersection;
1549         int freqs;
1550         size_t i, j;
1551
1552         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1553                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1554
1555         os_memset(&res, 0, sizeof(res));
1556         res.role_go = go;
1557         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1558         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1559         res.wps_method = peer->wps_method;
1560         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1561                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1562                         res.persistent_group = 2;
1563                 else
1564                         res.persistent_group = 1;
1565         }
1566
1567         if (go) {
1568                 /* Setup AP mode for WPS provisioning */
1569                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1570                                                p2p->op_channel);
1571                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1572                 res.ssid_len = p2p->ssid_len;
1573                 p2p_random(res.passphrase, 8);
1574         } else {
1575                 res.freq = peer->oper_freq;
1576                 if (p2p->ssid_len) {
1577                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1578                         res.ssid_len = p2p->ssid_len;
1579                 }
1580         }
1581
1582         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1583         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1584         p2p_channels_intersect(&p2p->channels, &peer->channels,
1585                                &intersection);
1586         if (go) {
1587                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1588                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1589                                   &intersection);
1590         }
1591         freqs = 0;
1592         for (i = 0; i < intersection.reg_classes; i++) {
1593                 struct p2p_reg_class *c = &intersection.reg_class[i];
1594                 if (freqs + 1 == P2P_MAX_CHANNELS)
1595                         break;
1596                 for (j = 0; j < c->channels; j++) {
1597                         int freq;
1598                         if (freqs + 1 == P2P_MAX_CHANNELS)
1599                                 break;
1600                         freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1601                         if (freq < 0)
1602                                 continue;
1603                         res.freq_list[freqs++] = freq;
1604                 }
1605         }
1606
1607         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1608
1609         p2p_clear_timeout(p2p);
1610         p2p->ssid_set = 0;
1611         peer->go_neg_req_sent = 0;
1612         peer->wps_method = WPS_NOT_READY;
1613         peer->oob_pw_id = 0;
1614
1615         p2p_set_state(p2p, P2P_PROVISIONING);
1616         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1617 }
1618
1619
1620 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1621                               const u8 *data, size_t len, int rx_freq)
1622 {
1623         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1624         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1625
1626         if (len < 1)
1627                 return;
1628
1629         switch (data[0]) {
1630         case P2P_GO_NEG_REQ:
1631                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1632                 break;
1633         case P2P_GO_NEG_RESP:
1634                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1635                 break;
1636         case P2P_GO_NEG_CONF:
1637                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1638                 break;
1639         case P2P_INVITATION_REQ:
1640                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1641                                            rx_freq);
1642                 break;
1643         case P2P_INVITATION_RESP:
1644                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1645                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1646                 break;
1647         case P2P_PROV_DISC_REQ:
1648                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1649                 break;
1650         case P2P_PROV_DISC_RESP:
1651                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1652                 break;
1653         case P2P_DEV_DISC_REQ:
1654                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1655                 break;
1656         case P2P_DEV_DISC_RESP:
1657                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1658                 break;
1659         default:
1660                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1661                         data[0]);
1662                 break;
1663         }
1664 }
1665
1666
1667 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1668                                  const u8 *sa, const u8 *bssid, const u8 *data,
1669                                  size_t len, int freq)
1670 {
1671         if (len < 1)
1672                 return;
1673
1674         switch (data[0]) {
1675         case WLAN_PA_VENDOR_SPECIFIC:
1676                 data++;
1677                 len--;
1678                 if (len < 4)
1679                         return;
1680                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1681                         return;
1682
1683                 data += 4;
1684                 len -= 4;
1685
1686                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1687                 break;
1688         case WLAN_PA_GAS_INITIAL_REQ:
1689                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1690                 break;
1691         case WLAN_PA_GAS_INITIAL_RESP:
1692                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1693                 break;
1694         case WLAN_PA_GAS_COMEBACK_REQ:
1695                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1696                 break;
1697         case WLAN_PA_GAS_COMEBACK_RESP:
1698                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1699                 break;
1700         }
1701 }
1702
1703
1704 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1705                    const u8 *bssid, u8 category,
1706                    const u8 *data, size_t len, int freq)
1707 {
1708         if (category == WLAN_ACTION_PUBLIC) {
1709                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1710                 return;
1711         }
1712
1713         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1714                 return;
1715
1716         if (len < 4)
1717                 return;
1718
1719         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1720                 return;
1721         data += 4;
1722         len -= 4;
1723
1724         /* P2P action frame */
1725         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1726         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1727
1728         if (len < 1)
1729                 return;
1730         switch (data[0]) {
1731         case P2P_NOA:
1732                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1733                 /* TODO */
1734                 break;
1735         case P2P_PRESENCE_REQ:
1736                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1737                 break;
1738         case P2P_PRESENCE_RESP:
1739                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1740                 break;
1741         case P2P_GO_DISC_REQ:
1742                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1743                 break;
1744         default:
1745                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1746                 break;
1747         }
1748 }
1749
1750
1751 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1752 {
1753         struct p2p_data *p2p = eloop_ctx;
1754         if (p2p->go_neg_peer == NULL)
1755                 return;
1756         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1757         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1758         p2p_connect_send(p2p, p2p->go_neg_peer);
1759 }
1760
1761
1762 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1763 {
1764         struct p2p_data *p2p = eloop_ctx;
1765         if (p2p->invite_peer == NULL)
1766                 return;
1767         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1768         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1769                         p2p->invite_dev_pw_id);
1770 }
1771
1772
1773 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1774                                        const u8 *ie, size_t ie_len)
1775 {
1776         struct p2p_message msg;
1777         struct p2p_device *dev;
1778
1779         os_memset(&msg, 0, sizeof(msg));
1780         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1781         {
1782                 p2p_parse_free(&msg);
1783                 return; /* not a P2P probe */
1784         }
1785
1786         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1787             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1788             != 0) {
1789                 /* The Probe Request is not part of P2P Device Discovery. It is
1790                  * not known whether the source address of the frame is the P2P
1791                  * Device Address or P2P Interface Address. Do not add a new
1792                  * peer entry based on this frames.
1793                  */
1794                 p2p_parse_free(&msg);
1795                 return;
1796         }
1797
1798         dev = p2p_get_device(p2p, addr);
1799         if (dev) {
1800                 if (dev->country[0] == 0 && msg.listen_channel)
1801                         os_memcpy(dev->country, msg.listen_channel, 3);
1802                 os_get_reltime(&dev->last_seen);
1803                 p2p_parse_free(&msg);
1804                 return; /* already known */
1805         }
1806
1807         dev = p2p_create_device(p2p, addr);
1808         if (dev == NULL) {
1809                 p2p_parse_free(&msg);
1810                 return;
1811         }
1812
1813         os_get_reltime(&dev->last_seen);
1814         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1815
1816         if (msg.listen_channel) {
1817                 os_memcpy(dev->country, msg.listen_channel, 3);
1818                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1819                                                        msg.listen_channel[4]);
1820         }
1821
1822         p2p_copy_wps_info(p2p, dev, 1, &msg);
1823
1824         if (msg.wfd_subelems) {
1825                 wpabuf_free(dev->info.wfd_subelems);
1826                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1827         }
1828
1829         p2p_parse_free(&msg);
1830
1831         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1832                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1833                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1834                 dev->info.group_capab, dev->info.device_name,
1835                 dev->listen_freq);
1836 }
1837
1838
1839 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1840                                                 const u8 *addr,
1841                                                 struct p2p_message *msg)
1842 {
1843         struct p2p_device *dev;
1844
1845         dev = p2p_get_device(p2p, addr);
1846         if (dev) {
1847                 os_get_reltime(&dev->last_seen);
1848                 return dev; /* already known */
1849         }
1850
1851         dev = p2p_create_device(p2p, addr);
1852         if (dev == NULL)
1853                 return NULL;
1854
1855         p2p_add_dev_info(p2p, addr, dev, msg);
1856
1857         return dev;
1858 }
1859
1860
1861 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1862 {
1863         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1864                 return 1;
1865         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1866             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1867             WPA_GET_BE16(&req_dev_type[6]) == 0)
1868                 return 1; /* Category match with wildcard OUI/sub-category */
1869         return 0;
1870 }
1871
1872
1873 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1874                         size_t num_req_dev_type)
1875 {
1876         size_t i;
1877         for (i = 0; i < num_req_dev_type; i++) {
1878                 if (dev_type_match(dev_type, req_dev_type[i]))
1879                         return 1;
1880         }
1881         return 0;
1882 }
1883
1884
1885 /**
1886  * p2p_match_dev_type - Match local device type with requested type
1887  * @p2p: P2P module context from p2p_init()
1888  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1889  * Returns: 1 on match, 0 on mismatch
1890  *
1891  * This function can be used to match the Requested Device Type attribute in
1892  * WPS IE with the local device types for deciding whether to reply to a Probe
1893  * Request frame.
1894  */
1895 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1896 {
1897         struct wps_parse_attr attr;
1898         size_t i;
1899
1900         if (wps_parse_msg(wps, &attr))
1901                 return 1; /* assume no Requested Device Type attributes */
1902
1903         if (attr.num_req_dev_type == 0)
1904                 return 1; /* no Requested Device Type attributes -> match */
1905
1906         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1907                                 attr.num_req_dev_type))
1908                 return 1; /* Own Primary Device Type matches */
1909
1910         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1911                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1912                                         attr.req_dev_type,
1913                                         attr.num_req_dev_type))
1914                 return 1; /* Own Secondary Device Type matches */
1915
1916         /* No matching device type found */
1917         return 0;
1918 }
1919
1920
1921 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1922 {
1923         struct wpabuf *buf;
1924         u8 *len;
1925         int pw_id = -1;
1926         size_t extra = 0;
1927
1928 #ifdef CONFIG_WIFI_DISPLAY
1929         if (p2p->wfd_ie_probe_resp)
1930                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
1931 #endif /* CONFIG_WIFI_DISPLAY */
1932
1933         buf = wpabuf_alloc(1000 + extra);
1934         if (buf == NULL)
1935                 return NULL;
1936
1937         if (p2p->go_neg_peer) {
1938                 /* Advertise immediate availability of WPS credential */
1939                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
1940         }
1941
1942         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
1943                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
1944                 wpabuf_free(buf);
1945                 return NULL;
1946         }
1947
1948 #ifdef CONFIG_WIFI_DISPLAY
1949         if (p2p->wfd_ie_probe_resp)
1950                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
1951 #endif /* CONFIG_WIFI_DISPLAY */
1952
1953         /* P2P IE */
1954         len = p2p_buf_add_ie_hdr(buf);
1955         p2p_buf_add_capability(buf, p2p->dev_capab &
1956                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
1957         if (p2p->ext_listen_interval)
1958                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
1959                                               p2p->ext_listen_interval);
1960         p2p_buf_add_device_info(buf, p2p, NULL);
1961         p2p_buf_update_ie_hdr(buf, len);
1962
1963         return buf;
1964 }
1965
1966
1967 static enum p2p_probe_req_status
1968 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
1969                 const u8 *bssid, const u8 *ie, size_t ie_len)
1970 {
1971         struct ieee802_11_elems elems;
1972         struct wpabuf *buf;
1973         struct ieee80211_mgmt *resp;
1974         struct p2p_message msg;
1975         struct wpabuf *ies;
1976
1977         if (!p2p->in_listen || !p2p->drv_in_listen) {
1978                 /* not in Listen state - ignore Probe Request */
1979                 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
1980                         p2p->in_listen, p2p->drv_in_listen);
1981                 return P2P_PREQ_NOT_LISTEN;
1982         }
1983
1984         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
1985             ParseFailed) {
1986                 /* Ignore invalid Probe Request frames */
1987                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
1988                 return P2P_PREQ_MALFORMED;
1989         }
1990
1991         if (elems.p2p == NULL) {
1992                 /* not a P2P probe - ignore it */
1993                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
1994                 return P2P_PREQ_NOT_P2P;
1995         }
1996
1997         if (dst && !is_broadcast_ether_addr(dst) &&
1998             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
1999                 /* Not sent to the broadcast address or our P2P Device Address
2000                  */
2001                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2002                         MAC2STR(dst));
2003                 return P2P_PREQ_NOT_PROCESSED;
2004         }
2005
2006         if (bssid && !is_broadcast_ether_addr(bssid)) {
2007                 /* Not sent to the Wildcard BSSID */
2008                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2009                         MAC2STR(bssid));
2010                 return P2P_PREQ_NOT_PROCESSED;
2011         }
2012
2013         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2014             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2015             0) {
2016                 /* not using P2P Wildcard SSID - ignore */
2017                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2018                 return P2P_PREQ_NOT_PROCESSED;
2019         }
2020
2021         if (supp_rates_11b_only(&elems)) {
2022                 /* Indicates support for 11b rates only */
2023                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2024                 return P2P_PREQ_NOT_P2P;
2025         }
2026
2027         os_memset(&msg, 0, sizeof(msg));
2028         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2029                 /* Could not parse P2P attributes */
2030                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2031                 return P2P_PREQ_NOT_P2P;
2032         }
2033
2034         if (msg.device_id &&
2035             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2036                 /* Device ID did not match */
2037                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2038                         MAC2STR(msg.device_id));
2039                 p2p_parse_free(&msg);
2040                 return P2P_PREQ_NOT_PROCESSED;
2041         }
2042
2043         /* Check Requested Device Type match */
2044         if (msg.wps_attributes &&
2045             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2046                 /* No match with Requested Device Type */
2047                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2048                 p2p_parse_free(&msg);
2049                 return P2P_PREQ_NOT_PROCESSED;
2050         }
2051         p2p_parse_free(&msg);
2052
2053         if (!p2p->cfg->send_probe_resp) {
2054                 /* Response generated elsewhere */
2055                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2056                 return P2P_PREQ_NOT_PROCESSED;
2057         }
2058
2059         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2060
2061         /*
2062          * We do not really have a specific BSS that this frame is advertising,
2063          * so build a frame that has some information in valid format. This is
2064          * really only used for discovery purposes, not to learn exact BSS
2065          * parameters.
2066          */
2067         ies = p2p_build_probe_resp_ies(p2p);
2068         if (ies == NULL)
2069                 return P2P_PREQ_NOT_PROCESSED;
2070
2071         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2072         if (buf == NULL) {
2073                 wpabuf_free(ies);
2074                 return P2P_PREQ_NOT_PROCESSED;
2075         }
2076
2077         resp = NULL;
2078         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2079
2080         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2081                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2082         os_memcpy(resp->da, addr, ETH_ALEN);
2083         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2084         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2085         resp->u.probe_resp.beacon_int = host_to_le16(100);
2086         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2087         resp->u.probe_resp.capab_info =
2088                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2089                              WLAN_CAPABILITY_PRIVACY |
2090                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2091
2092         wpabuf_put_u8(buf, WLAN_EID_SSID);
2093         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2094         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2095
2096         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2097         wpabuf_put_u8(buf, 8);
2098         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2099         wpabuf_put_u8(buf, 90 / 5);
2100         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2101         wpabuf_put_u8(buf, 180 / 5);
2102         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2103         wpabuf_put_u8(buf, 360 / 5);
2104         wpabuf_put_u8(buf, 480 / 5);
2105         wpabuf_put_u8(buf, 540 / 5);
2106
2107         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2108         wpabuf_put_u8(buf, 1);
2109         wpabuf_put_u8(buf, p2p->cfg->channel);
2110
2111         wpabuf_put_buf(buf, ies);
2112         wpabuf_free(ies);
2113
2114         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2115
2116         wpabuf_free(buf);
2117
2118         return P2P_PREQ_NOT_PROCESSED;
2119 }
2120
2121
2122 enum p2p_probe_req_status
2123 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2124                  const u8 *bssid, const u8 *ie, size_t ie_len)
2125 {
2126         enum p2p_probe_req_status res;
2127
2128         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2129
2130         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2131
2132         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2133             p2p->go_neg_peer &&
2134             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2135             == 0 &&
2136             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2137                 /* Received a Probe Request from GO Negotiation peer */
2138                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2139                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2140                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2141                 return P2P_PREQ_PROCESSED;
2142         }
2143
2144         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2145             p2p->invite_peer &&
2146             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2147             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2148             == 0) {
2149                 /* Received a Probe Request from Invite peer */
2150                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2151                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2152                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2153                 return P2P_PREQ_PROCESSED;
2154         }
2155
2156         return res;
2157 }
2158
2159
2160 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2161                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2162 {
2163         struct wpabuf *tmp;
2164         u8 *lpos;
2165         size_t tmplen;
2166         int res;
2167         u8 group_capab;
2168
2169         if (p2p_ie == NULL)
2170                 return 0; /* WLAN AP is not a P2P manager */
2171
2172         /*
2173          * (Re)Association Request - P2P IE
2174          * P2P Capability attribute (shall be present)
2175          * P2P Interface attribute (present if concurrent device and
2176          *      P2P Management is enabled)
2177          */
2178         tmp = wpabuf_alloc(200);
2179         if (tmp == NULL)
2180                 return -1;
2181
2182         lpos = p2p_buf_add_ie_hdr(tmp);
2183         group_capab = 0;
2184         if (p2p->num_groups > 0) {
2185                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2186                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2187                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2188                     p2p->cross_connect)
2189                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2190         }
2191         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2192         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2193             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2194                 p2p_buf_add_p2p_interface(tmp, p2p);
2195         p2p_buf_update_ie_hdr(tmp, lpos);
2196
2197         tmplen = wpabuf_len(tmp);
2198         if (tmplen > len)
2199                 res = -1;
2200         else {
2201                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2202                 res = tmplen;
2203         }
2204         wpabuf_free(tmp);
2205
2206         return res;
2207 }
2208
2209
2210 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2211                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2212 {
2213         struct wpabuf *tmp;
2214         u8 *lpos;
2215         struct p2p_device *peer;
2216         size_t tmplen;
2217         int res;
2218         size_t extra = 0;
2219
2220         if (!p2p_group)
2221                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2222
2223 #ifdef CONFIG_WIFI_DISPLAY
2224         if (p2p->wfd_ie_assoc_req)
2225                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2226 #endif /* CONFIG_WIFI_DISPLAY */
2227
2228         /*
2229          * (Re)Association Request - P2P IE
2230          * P2P Capability attribute (shall be present)
2231          * Extended Listen Timing (may be present)
2232          * P2P Device Info attribute (shall be present)
2233          */
2234         tmp = wpabuf_alloc(200 + extra);
2235         if (tmp == NULL)
2236                 return -1;
2237
2238 #ifdef CONFIG_WIFI_DISPLAY
2239         if (p2p->wfd_ie_assoc_req)
2240                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2241 #endif /* CONFIG_WIFI_DISPLAY */
2242
2243         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2244
2245         lpos = p2p_buf_add_ie_hdr(tmp);
2246         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2247         if (p2p->ext_listen_interval)
2248                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2249                                               p2p->ext_listen_interval);
2250         p2p_buf_add_device_info(tmp, p2p, peer);
2251         p2p_buf_update_ie_hdr(tmp, lpos);
2252
2253         tmplen = wpabuf_len(tmp);
2254         if (tmplen > len)
2255                 res = -1;
2256         else {
2257                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2258                 res = tmplen;
2259         }
2260         wpabuf_free(tmp);
2261
2262         return res;
2263 }
2264
2265
2266 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2267 {
2268         struct wpabuf *p2p_ie;
2269         int ret;
2270
2271         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2272         if (p2p_ie == NULL)
2273                 return 0;
2274
2275         ret = p2p_attr_text(p2p_ie, buf, end);
2276         wpabuf_free(p2p_ie);
2277         return ret;
2278 }
2279
2280
2281 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2282 {
2283         struct p2p_message msg;
2284
2285         os_memset(&msg, 0, sizeof(msg));
2286         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2287                 return -1;
2288
2289         if (msg.p2p_device_addr) {
2290                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2291                 return 0;
2292         } else if (msg.device_id) {
2293                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2294                 return 0;
2295         }
2296         return -1;
2297 }
2298
2299
2300 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2301 {
2302         struct wpabuf *p2p_ie;
2303         int ret;
2304
2305         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2306                                              P2P_IE_VENDOR_TYPE);
2307         if (p2p_ie == NULL)
2308                 return -1;
2309         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2310         wpabuf_free(p2p_ie);
2311         return ret;
2312 }
2313
2314
2315 static void p2p_clear_go_neg(struct p2p_data *p2p)
2316 {
2317         p2p->go_neg_peer = NULL;
2318         p2p_clear_timeout(p2p);
2319         p2p_set_state(p2p, P2P_IDLE);
2320 }
2321
2322
2323 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2324 {
2325         if (p2p->go_neg_peer == NULL) {
2326                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2327                 return; /* No pending Group Formation */
2328         }
2329
2330         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2331             0) {
2332                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2333                         MACSTR " (GO Negotiation peer " MACSTR ")",
2334                         MAC2STR(mac_addr),
2335                         MAC2STR(p2p->go_neg_peer->intended_addr));
2336                 return; /* Ignore unexpected peer address */
2337         }
2338
2339         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2340                 MAC2STR(mac_addr));
2341
2342         p2p_clear_go_neg(p2p);
2343 }
2344
2345
2346 void p2p_group_formation_failed(struct p2p_data *p2p)
2347 {
2348         if (p2p->go_neg_peer == NULL) {
2349                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2350                 return; /* No pending Group Formation */
2351         }
2352
2353         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2354                 MAC2STR(p2p->go_neg_peer->intended_addr));
2355
2356         p2p_clear_go_neg(p2p);
2357 }
2358
2359
2360 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2361 {
2362         struct p2p_data *p2p;
2363
2364         if (cfg->max_peers < 1)
2365                 return NULL;
2366
2367         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2368         if (p2p == NULL)
2369                 return NULL;
2370         p2p->cfg = (struct p2p_config *) (p2p + 1);
2371         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2372         if (cfg->dev_name)
2373                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2374         if (cfg->manufacturer)
2375                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2376         if (cfg->model_name)
2377                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2378         if (cfg->model_number)
2379                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2380         if (cfg->serial_number)
2381                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2382         if (cfg->pref_chan) {
2383                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2384                                                 sizeof(struct p2p_channel));
2385                 if (p2p->cfg->pref_chan) {
2386                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2387                                   cfg->num_pref_chan *
2388                                   sizeof(struct p2p_channel));
2389                 } else
2390                         p2p->cfg->num_pref_chan = 0;
2391         }
2392
2393         p2p->min_disc_int = 1;
2394         p2p->max_disc_int = 3;
2395         p2p->max_disc_tu = -1;
2396
2397         os_get_random(&p2p->next_tie_breaker, 1);
2398         p2p->next_tie_breaker &= 0x01;
2399         if (cfg->sd_request)
2400                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2401         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2402         if (cfg->concurrent_operations)
2403                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2404         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2405
2406         dl_list_init(&p2p->devices);
2407
2408         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2409                                p2p_expiration_timeout, p2p, NULL);
2410
2411         p2p->go_timeout = 100;
2412         p2p->client_timeout = 20;
2413         p2p->num_p2p_sd_queries = 0;
2414
2415         p2p_dbg(p2p, "initialized");
2416         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2417         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2418
2419         return p2p;
2420 }
2421
2422
2423 void p2p_deinit(struct p2p_data *p2p)
2424 {
2425 #ifdef CONFIG_WIFI_DISPLAY
2426         wpabuf_free(p2p->wfd_ie_beacon);
2427         wpabuf_free(p2p->wfd_ie_probe_req);
2428         wpabuf_free(p2p->wfd_ie_probe_resp);
2429         wpabuf_free(p2p->wfd_ie_assoc_req);
2430         wpabuf_free(p2p->wfd_ie_invitation);
2431         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2432         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2433         wpabuf_free(p2p->wfd_ie_go_neg);
2434         wpabuf_free(p2p->wfd_dev_info);
2435         wpabuf_free(p2p->wfd_assoc_bssid);
2436         wpabuf_free(p2p->wfd_coupled_sink_info);
2437 #endif /* CONFIG_WIFI_DISPLAY */
2438
2439         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2440         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2441         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2442         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2443         p2p_flush(p2p);
2444         p2p_free_req_dev_types(p2p);
2445         os_free(p2p->cfg->dev_name);
2446         os_free(p2p->cfg->manufacturer);
2447         os_free(p2p->cfg->model_name);
2448         os_free(p2p->cfg->model_number);
2449         os_free(p2p->cfg->serial_number);
2450         os_free(p2p->cfg->pref_chan);
2451         os_free(p2p->groups);
2452         wpabuf_free(p2p->sd_resp);
2453         os_free(p2p->after_scan_tx);
2454         p2p_remove_wps_vendor_extensions(p2p);
2455         os_free(p2p->no_go_freq.range);
2456         os_free(p2p);
2457 }
2458
2459
2460 void p2p_flush(struct p2p_data *p2p)
2461 {
2462         struct p2p_device *dev, *prev;
2463         p2p_stop_find(p2p);
2464         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2465                               list) {
2466                 dl_list_del(&dev->list);
2467                 p2p_device_free(p2p, dev);
2468         }
2469         p2p_free_sd_queries(p2p);
2470         os_free(p2p->after_scan_tx);
2471         p2p->after_scan_tx = NULL;
2472 }
2473
2474
2475 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2476 {
2477         struct p2p_device *dev;
2478
2479         dev = p2p_get_device(p2p, addr);
2480         if (dev == NULL)
2481                 return -1;
2482
2483         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2484
2485         if (p2p->go_neg_peer == dev)
2486                 p2p->go_neg_peer = NULL;
2487
2488         dev->wps_method = WPS_NOT_READY;
2489         dev->oob_pw_id = 0;
2490         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2491         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2492
2493         /* Check if after_scan_tx is for this peer. If so free it */
2494         if (p2p->after_scan_tx &&
2495             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2496                 os_free(p2p->after_scan_tx);
2497                 p2p->after_scan_tx = NULL;
2498         }
2499
2500         return 0;
2501 }
2502
2503
2504 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2505 {
2506         os_free(p2p->cfg->dev_name);
2507         if (dev_name) {
2508                 p2p->cfg->dev_name = os_strdup(dev_name);
2509                 if (p2p->cfg->dev_name == NULL)
2510                         return -1;
2511         } else
2512                 p2p->cfg->dev_name = NULL;
2513         return 0;
2514 }
2515
2516
2517 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2518 {
2519         os_free(p2p->cfg->manufacturer);
2520         p2p->cfg->manufacturer = NULL;
2521         if (manufacturer) {
2522                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2523                 if (p2p->cfg->manufacturer == NULL)
2524                         return -1;
2525         }
2526
2527         return 0;
2528 }
2529
2530
2531 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2532 {
2533         os_free(p2p->cfg->model_name);
2534         p2p->cfg->model_name = NULL;
2535         if (model_name) {
2536                 p2p->cfg->model_name = os_strdup(model_name);
2537                 if (p2p->cfg->model_name == NULL)
2538                         return -1;
2539         }
2540
2541         return 0;
2542 }
2543
2544
2545 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2546 {
2547         os_free(p2p->cfg->model_number);
2548         p2p->cfg->model_number = NULL;
2549         if (model_number) {
2550                 p2p->cfg->model_number = os_strdup(model_number);
2551                 if (p2p->cfg->model_number == NULL)
2552                         return -1;
2553         }
2554
2555         return 0;
2556 }
2557
2558
2559 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2560 {
2561         os_free(p2p->cfg->serial_number);
2562         p2p->cfg->serial_number = NULL;
2563         if (serial_number) {
2564                 p2p->cfg->serial_number = os_strdup(serial_number);
2565                 if (p2p->cfg->serial_number == NULL)
2566                         return -1;
2567         }
2568
2569         return 0;
2570 }
2571
2572
2573 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2574 {
2575         p2p->cfg->config_methods = config_methods;
2576 }
2577
2578
2579 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2580 {
2581         os_memcpy(p2p->cfg->uuid, uuid, 16);
2582 }
2583
2584
2585 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2586 {
2587         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2588         return 0;
2589 }
2590
2591
2592 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2593                           size_t num_dev_types)
2594 {
2595         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2596                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2597         p2p->cfg->num_sec_dev_types = num_dev_types;
2598         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2599         return 0;
2600 }
2601
2602
2603 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2604 {
2605         int i;
2606
2607         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2608                 wpabuf_free(p2p->wps_vendor_ext[i]);
2609                 p2p->wps_vendor_ext[i] = NULL;
2610         }
2611 }
2612
2613
2614 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2615                                  const struct wpabuf *vendor_ext)
2616 {
2617         int i;
2618
2619         if (vendor_ext == NULL)
2620                 return -1;
2621
2622         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2623                 if (p2p->wps_vendor_ext[i] == NULL)
2624                         break;
2625         }
2626         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2627                 return -1;
2628
2629         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2630         if (p2p->wps_vendor_ext[i] == NULL)
2631                 return -1;
2632
2633         return 0;
2634 }
2635
2636
2637 int p2p_set_country(struct p2p_data *p2p, const char *country)
2638 {
2639         os_memcpy(p2p->cfg->country, country, 3);
2640         return 0;
2641 }
2642
2643
2644 void p2p_continue_find(struct p2p_data *p2p)
2645 {
2646         struct p2p_device *dev;
2647         p2p_set_state(p2p, P2P_SEARCH);
2648         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2649                 if (dev->sd_pending_bcast_queries == 0) {
2650                         /* Initialize with total number of registered broadcast
2651                          * SD queries. */
2652                         dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2653                 }
2654
2655                 if (p2p_start_sd(p2p, dev) == 0)
2656                         return;
2657                 if (dev->req_config_methods &&
2658                     !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2659                         p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2660                                 MACSTR " (config methods 0x%x)",
2661                                 MAC2STR(dev->info.p2p_device_addr),
2662                                 dev->req_config_methods);
2663                         if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2664                                 return;
2665                 }
2666         }
2667
2668         p2p_listen_in_find(p2p, 1);
2669 }
2670
2671
2672 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2673 {
2674         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2675                 success);
2676         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2677
2678         if (!success) {
2679                 p2p->sd_peer = NULL;
2680                 p2p_continue_find(p2p);
2681                 return;
2682         }
2683
2684         if (p2p->sd_peer == NULL) {
2685                 p2p_dbg(p2p, "No SD peer entry known");
2686                 p2p_continue_find(p2p);
2687                 return;
2688         }
2689
2690         /* Wait for response from the peer */
2691         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2692         p2p_set_timeout(p2p, 0, 200000);
2693 }
2694
2695
2696 /**
2697  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2698  * @p2p: P2P module context from p2p_init()
2699  */
2700 static void p2p_retry_pd(struct p2p_data *p2p)
2701 {
2702         struct p2p_device *dev;
2703
2704         if (p2p->state != P2P_IDLE)
2705                 return;
2706
2707         /*
2708          * Retry the prov disc req attempt only for the peer that the user had
2709          * requested.
2710          */
2711
2712         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2713                 if (os_memcmp(p2p->pending_pd_devaddr,
2714                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2715                         continue;
2716                 if (!dev->req_config_methods)
2717                         continue;
2718
2719                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2720                         MACSTR " (config methods 0x%x)",
2721                         MAC2STR(dev->info.p2p_device_addr),
2722                         dev->req_config_methods);
2723                 p2p_send_prov_disc_req(p2p, dev,
2724                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2725                                        p2p->pd_force_freq);
2726                 return;
2727         }
2728 }
2729
2730
2731 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2732 {
2733         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2734                 success);
2735
2736         /*
2737          * Postpone resetting the pending action state till after we actually
2738          * time out. This allows us to take some action like notifying any
2739          * interested parties about no response to the request.
2740          *
2741          * When the timer (below) goes off we check in IDLE, SEARCH, or
2742          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2743          * requests in, if this was still pending and then raise notification.
2744          */
2745
2746         if (!success) {
2747                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2748
2749                 if (p2p->user_initiated_pd &&
2750                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2751                 {
2752                         /* Retry request from timeout to avoid busy loops */
2753                         p2p->pending_action_state = P2P_PENDING_PD;
2754                         p2p_set_timeout(p2p, 0, 50000);
2755                 } else if (p2p->state != P2P_IDLE)
2756                         p2p_continue_find(p2p);
2757                 else if (p2p->user_initiated_pd) {
2758                         p2p->pending_action_state = P2P_PENDING_PD;
2759                         p2p_set_timeout(p2p, 0, 300000);
2760                 }
2761                 return;
2762         }
2763
2764         /*
2765          * This postponing, of resetting pending_action_state, needs to be
2766          * done only for user initiated PD requests and not internal ones.
2767          */
2768         if (p2p->user_initiated_pd)
2769                 p2p->pending_action_state = P2P_PENDING_PD;
2770         else
2771                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2772
2773         /* Wait for response from the peer */
2774         if (p2p->state == P2P_SEARCH)
2775                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2776         p2p_set_timeout(p2p, 0, 200000);
2777 }
2778
2779
2780 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2781                          struct os_reltime *rx_time, int level, const u8 *ies,
2782                          size_t ies_len)
2783 {
2784         if (os_reltime_before(rx_time, &p2p->find_start)) {
2785                 /*
2786                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2787                  * scan results for relatively long time. To avoid reporting
2788                  * stale information, update P2P peers only based on results
2789                  * that have based on frames received after the last p2p_find
2790                  * operation was started.
2791                  */
2792                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2793                         " (rx_time=%u.%06u)",
2794                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2795                         (unsigned int) rx_time->usec);
2796                 return 0;
2797         }
2798
2799         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2800
2801         return 0;
2802 }
2803
2804
2805 void p2p_scan_res_handled(struct p2p_data *p2p)
2806 {
2807         if (!p2p->p2p_scan_running) {
2808                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2809         }
2810         p2p->p2p_scan_running = 0;
2811         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2812
2813         if (p2p_run_after_scan(p2p))
2814                 return;
2815         if (p2p->state == P2P_SEARCH)
2816                 p2p_continue_find(p2p);
2817 }
2818
2819
2820 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2821 {
2822         u8 *len;
2823
2824 #ifdef CONFIG_WIFI_DISPLAY
2825         if (p2p->wfd_ie_probe_req)
2826                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2827 #endif /* CONFIG_WIFI_DISPLAY */
2828
2829         len = p2p_buf_add_ie_hdr(ies);
2830         p2p_buf_add_capability(ies, p2p->dev_capab &
2831                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2832         if (dev_id)
2833                 p2p_buf_add_device_id(ies, dev_id);
2834         if (p2p->cfg->reg_class && p2p->cfg->channel)
2835                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2836                                            p2p->cfg->reg_class,
2837                                            p2p->cfg->channel);
2838         if (p2p->ext_listen_interval)
2839                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2840                                               p2p->ext_listen_interval);
2841         /* TODO: p2p_buf_add_operating_channel() if GO */
2842         p2p_buf_update_ie_hdr(ies, len);
2843 }
2844
2845
2846 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2847 {
2848         size_t len = 100;
2849
2850 #ifdef CONFIG_WIFI_DISPLAY
2851         if (p2p && p2p->wfd_ie_probe_req)
2852                 len += wpabuf_len(p2p->wfd_ie_probe_req);
2853 #endif /* CONFIG_WIFI_DISPLAY */
2854
2855         return len;
2856 }
2857
2858
2859 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
2860 {
2861         return p2p_attr_text(p2p_ie, buf, end);
2862 }
2863
2864
2865 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
2866 {
2867         struct p2p_device *dev = p2p->go_neg_peer;
2868         int timeout;
2869
2870         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
2871
2872         if (dev == NULL) {
2873                 p2p_dbg(p2p, "No pending GO Negotiation");
2874                 return;
2875         }
2876
2877         if (success) {
2878                 if (dev->flags & P2P_DEV_USER_REJECTED) {
2879                         p2p_set_state(p2p, P2P_IDLE);
2880                         return;
2881                 }
2882         } else if (dev->go_neg_req_sent) {
2883                 /* Cancel the increment from p2p_connect_send() on failure */
2884                 dev->go_neg_req_sent--;
2885         }
2886
2887         if (!success &&
2888             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2889             !is_zero_ether_addr(dev->member_in_go_dev)) {
2890                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
2891                         MAC2STR(dev->info.p2p_device_addr));
2892                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2893                 p2p_send_dev_disc_req(p2p, dev);
2894                 return;
2895         }
2896
2897         /*
2898          * Use P2P find, if needed, to find the other device from its listen
2899          * channel.
2900          */
2901         p2p_set_state(p2p, P2P_CONNECT);
2902         timeout = success ? 500000 : 100000;
2903         if (!success && p2p->go_neg_peer &&
2904             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
2905                 unsigned int r;
2906                 /*
2907                  * Peer is expected to wait our response and we will skip the
2908                  * listen phase. Add some randomness to the wait time here to
2909                  * make it less likely to hit cases where we could end up in
2910                  * sync with peer not listening.
2911                  */
2912                 os_get_random((u8 *) &r, sizeof(r));
2913                 timeout += r % 100000;
2914         }
2915         p2p_set_timeout(p2p, 0, timeout);
2916 }
2917
2918
2919 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
2920 {
2921         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
2922                 success);
2923         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
2924                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
2925                 return;
2926         }
2927         p2p_set_state(p2p, P2P_CONNECT);
2928         p2p_set_timeout(p2p, 0, 500000);
2929 }
2930
2931
2932 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
2933                                        const u8 *addr)
2934 {
2935         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
2936         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
2937                 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
2938                                   p2p->go_neg_peer->status);
2939         } else if (success) {
2940                 struct p2p_device *dev;
2941                 dev = p2p_get_device(p2p, addr);
2942                 if (dev &&
2943                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
2944                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
2945         }
2946 }
2947
2948
2949 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
2950                                enum p2p_send_action_result result)
2951 {
2952         struct p2p_device *dev;
2953
2954         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
2955         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2956         if (result == P2P_SEND_ACTION_FAILED) {
2957                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
2958                 return;
2959         }
2960         if (result == P2P_SEND_ACTION_NO_ACK) {
2961                 /*
2962                  * It looks like the TX status for GO Negotiation Confirm is
2963                  * often showing failure even when the peer has actually
2964                  * received the frame. Since the peer may change channels
2965                  * immediately after having received the frame, we may not see
2966                  * an Ack for retries, so just dropping a single frame may
2967                  * trigger this. To allow the group formation to succeed if the
2968                  * peer did indeed receive the frame, continue regardless of
2969                  * the TX status.
2970                  */
2971                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
2972         }
2973
2974         dev = p2p->go_neg_peer;
2975         if (dev == NULL)
2976                 return;
2977
2978         p2p_go_complete(p2p, dev);
2979 }
2980
2981
2982 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
2983                         const u8 *src, const u8 *bssid,
2984                         enum p2p_send_action_result result)
2985 {
2986         enum p2p_pending_action_state state;
2987         int success;
2988
2989         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
2990                 " src=" MACSTR " bssid=" MACSTR " result=%d",
2991                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
2992                 MAC2STR(bssid), result);
2993         success = result == P2P_SEND_ACTION_SUCCESS;
2994         state = p2p->pending_action_state;
2995         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2996         switch (state) {
2997         case P2P_NO_PENDING_ACTION:
2998                 if (p2p->send_action_in_progress) {
2999                         p2p->send_action_in_progress = 0;
3000                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3001                 }
3002                 if (p2p->after_scan_tx_in_progress) {
3003                         p2p->after_scan_tx_in_progress = 0;
3004                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3005                             p2p_run_after_scan(p2p))
3006                                 break;
3007                         if (p2p->state == P2P_SEARCH) {
3008                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3009                                 p2p_continue_find(p2p);
3010                         }
3011                 }
3012                 break;
3013         case P2P_PENDING_GO_NEG_REQUEST:
3014                 p2p_go_neg_req_cb(p2p, success);
3015                 break;
3016         case P2P_PENDING_GO_NEG_RESPONSE:
3017                 p2p_go_neg_resp_cb(p2p, success);
3018                 break;
3019         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3020                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3021                 break;
3022         case P2P_PENDING_GO_NEG_CONFIRM:
3023                 p2p_go_neg_conf_cb(p2p, result);
3024                 break;
3025         case P2P_PENDING_SD:
3026                 p2p_sd_cb(p2p, success);
3027                 break;
3028         case P2P_PENDING_PD:
3029                 p2p_prov_disc_cb(p2p, success);
3030                 break;
3031         case P2P_PENDING_INVITATION_REQUEST:
3032                 p2p_invitation_req_cb(p2p, success);
3033                 break;
3034         case P2P_PENDING_INVITATION_RESPONSE:
3035                 p2p_invitation_resp_cb(p2p, success);
3036                 break;
3037         case P2P_PENDING_DEV_DISC_REQUEST:
3038                 p2p_dev_disc_req_cb(p2p, success);
3039                 break;
3040         case P2P_PENDING_DEV_DISC_RESPONSE:
3041                 p2p_dev_disc_resp_cb(p2p, success);
3042                 break;
3043         case P2P_PENDING_GO_DISC_REQ:
3044                 p2p_go_disc_req_cb(p2p, success);
3045                 break;
3046         }
3047
3048         p2p->after_scan_tx_in_progress = 0;
3049 }
3050
3051
3052 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3053                    unsigned int duration)
3054 {
3055         if (freq == p2p->pending_client_disc_freq) {
3056                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3057                 p2p->pending_client_disc_freq = 0;
3058                 return;
3059         }
3060
3061         if (freq != p2p->pending_listen_freq) {
3062                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3063                         freq, duration, p2p->pending_listen_freq);
3064                 return;
3065         }
3066
3067         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3068                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3069                 p2p->pending_listen_freq);
3070         p2p->in_listen = 1;
3071         p2p->drv_in_listen = freq;
3072         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3073                 /*
3074                  * Add 20 msec extra wait to avoid race condition with driver
3075                  * remain-on-channel end event, i.e., give driver more time to
3076                  * complete the operation before our timeout expires.
3077                  */
3078                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3079                                 p2p->pending_listen_usec + 20000);
3080         }
3081
3082         p2p->pending_listen_freq = 0;
3083 }
3084
3085
3086 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3087 {
3088         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3089         p2p->drv_in_listen = 0;
3090         if (p2p->in_listen)
3091                 return 0; /* Internal timeout will trigger the next step */
3092
3093         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3094                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3095                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3096                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3097                         return 0;
3098                 }
3099
3100                 p2p_set_state(p2p, P2P_CONNECT);
3101                 p2p_connect_send(p2p, p2p->go_neg_peer);
3102                 return 1;
3103         } else if (p2p->state == P2P_SEARCH) {
3104                 if (p2p->p2p_scan_running) {
3105                          /*
3106                           * Search is already in progress. This can happen if
3107                           * an Action frame RX is reported immediately after
3108                           * the end of a remain-on-channel operation and the
3109                           * response frame to that is sent using an offchannel
3110                           * operation while in p2p_find. Avoid an attempt to
3111                           * restart a scan here.
3112                           */
3113                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3114                         return 1;
3115                 }
3116                 if (p2p->pending_listen_freq) {
3117                         /*
3118                          * Better wait a bit if the driver is unable to start
3119                          * offchannel operation for some reason. p2p_search()
3120                          * will be started from internal timeout.
3121                          */
3122                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3123                         p2p_set_timeout(p2p, 0, 100000);
3124                         return 1;
3125                 }
3126                 if (p2p->search_delay) {
3127                         p2p_dbg(p2p, "Delay search operation by %u ms",
3128                                 p2p->search_delay);
3129                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3130                                         (p2p->search_delay % 1000) * 1000);
3131                         return 1;
3132                 }
3133                 p2p_search(p2p);
3134                 return 1;
3135         }
3136
3137         return 0;
3138 }
3139
3140
3141 static void p2p_timeout_connect(struct p2p_data *p2p)
3142 {
3143         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3144         if (p2p->go_neg_peer &&
3145             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3146                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3147                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3148                 return;
3149         }
3150         if (p2p->go_neg_peer &&
3151             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3152             p2p->go_neg_peer->connect_reqs < 120) {
3153                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3154                 p2p_connect_send(p2p, p2p->go_neg_peer);
3155                 return;
3156         }
3157         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3158                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3159                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3160                 p2p_set_timeout(p2p, 0, 30000);
3161                 return;
3162         }
3163         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3164         p2p_listen_in_find(p2p, 0);
3165 }
3166
3167
3168 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3169 {
3170         if (p2p->go_neg_peer) {
3171                 if (p2p->drv_in_listen) {
3172                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3173                         return;
3174                 }
3175
3176                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3177                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3178                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3179                         return;
3180                 }
3181
3182                 p2p_set_state(p2p, P2P_CONNECT);
3183                 p2p_connect_send(p2p, p2p->go_neg_peer);
3184         } else
3185                 p2p_set_state(p2p, P2P_IDLE);
3186 }
3187
3188
3189 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3190 {
3191         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3192
3193         if (p2p->cfg->is_concurrent_session_active &&
3194             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3195                 p2p_set_timeout(p2p, 0, 500000);
3196         else
3197                 p2p_set_timeout(p2p, 0, 200000);
3198 }
3199
3200
3201 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3202 {
3203         struct p2p_device *dev = p2p->go_neg_peer;
3204
3205         if (dev == NULL) {
3206                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3207                 return;
3208         }
3209
3210         dev->wait_count++;
3211         if (dev->wait_count >= 120) {
3212                 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3213                 p2p_go_neg_failed(p2p, dev, -1);
3214                 return;
3215         }
3216
3217         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3218         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3219         p2p_listen_in_find(p2p, 0);
3220 }
3221
3222
3223 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3224 {
3225         p2p_dbg(p2p, "Service Discovery Query timeout");
3226         if (p2p->sd_peer) {
3227                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3228                 p2p->sd_peer = NULL;
3229         }
3230         p2p_continue_find(p2p);
3231 }
3232
3233
3234 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3235 {
3236         p2p_dbg(p2p, "Provision Discovery Request timeout");
3237         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3238         p2p_continue_find(p2p);
3239 }
3240
3241
3242 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3243 {
3244         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3245
3246         /*
3247          * For user initiated PD requests that we have not gotten any responses
3248          * for while in IDLE state, we retry them a couple of times before
3249          * giving up.
3250          */
3251         if (!p2p->user_initiated_pd)
3252                 return;
3253
3254         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3255
3256         if (p2p->pd_retries) {
3257                 p2p->pd_retries--;
3258                 p2p_retry_pd(p2p);
3259         } else {
3260                 struct p2p_device *dev;
3261                 int for_join = 0;
3262
3263                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3264                         if (os_memcmp(p2p->pending_pd_devaddr,
3265                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3266                                 continue;
3267                         if (dev->req_config_methods &&
3268                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3269                                 for_join = 1;
3270                 }
3271
3272                 if (p2p->cfg->prov_disc_fail)
3273                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3274                                                  p2p->pending_pd_devaddr,
3275                                                  for_join ?
3276                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3277                                                  P2P_PROV_DISC_TIMEOUT);
3278                 p2p_reset_pending_pd(p2p);
3279         }
3280 }
3281
3282
3283 static void p2p_timeout_invite(struct p2p_data *p2p)
3284 {
3285         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3286         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3287         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3288                 /*
3289                  * Better remain on operating channel instead of listen channel
3290                  * when running a group.
3291                  */
3292                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3293                 p2p_set_timeout(p2p, 0, 100000);
3294                 return;
3295         }
3296         p2p_listen_in_find(p2p, 0);
3297 }
3298
3299
3300 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3301 {
3302         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3303                 p2p_set_state(p2p, P2P_INVITE);
3304                 p2p_invite_send(p2p, p2p->invite_peer,
3305                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3306         } else {
3307                 if (p2p->invite_peer) {
3308                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3309                         if (p2p->cfg->invitation_result)
3310                                 p2p->cfg->invitation_result(
3311                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3312                                         p2p->invite_peer->info.p2p_device_addr,
3313                                         0);
3314                 }
3315                 p2p_set_state(p2p, P2P_IDLE);
3316         }
3317 }
3318
3319
3320 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3321 {
3322         struct p2p_data *p2p = eloop_ctx;
3323
3324         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3325
3326         p2p->in_listen = 0;
3327
3328         switch (p2p->state) {
3329         case P2P_IDLE:
3330                 /* Check if we timed out waiting for PD req */
3331                 if (p2p->pending_action_state == P2P_PENDING_PD)
3332                         p2p_timeout_prov_disc_req(p2p);
3333                 break;
3334         case P2P_SEARCH:
3335                 /* Check if we timed out waiting for PD req */
3336                 if (p2p->pending_action_state == P2P_PENDING_PD)
3337                         p2p_timeout_prov_disc_req(p2p);
3338                 if (p2p->search_delay && !p2p->in_search_delay) {
3339                         p2p_dbg(p2p, "Delay search operation by %u ms",
3340                                 p2p->search_delay);
3341                         p2p->in_search_delay = 1;
3342                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3343                                         (p2p->search_delay % 1000) * 1000);
3344                         break;
3345                 }
3346                 p2p->in_search_delay = 0;
3347                 p2p_search(p2p);
3348                 break;
3349         case P2P_CONNECT:
3350                 p2p_timeout_connect(p2p);
3351                 break;
3352         case P2P_CONNECT_LISTEN:
3353                 p2p_timeout_connect_listen(p2p);
3354                 break;
3355         case P2P_GO_NEG:
3356                 break;
3357         case P2P_LISTEN_ONLY:
3358                 /* Check if we timed out waiting for PD req */
3359                 if (p2p->pending_action_state == P2P_PENDING_PD)
3360                         p2p_timeout_prov_disc_req(p2p);
3361
3362                 if (p2p->ext_listen_only) {
3363                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3364                         p2p->ext_listen_only = 0;
3365                         p2p_set_state(p2p, P2P_IDLE);
3366                 }
3367                 break;
3368         case P2P_WAIT_PEER_CONNECT:
3369                 p2p_timeout_wait_peer_connect(p2p);
3370                 break;
3371         case P2P_WAIT_PEER_IDLE:
3372                 p2p_timeout_wait_peer_idle(p2p);
3373                 break;
3374         case P2P_SD_DURING_FIND:
3375                 p2p_timeout_sd_during_find(p2p);
3376                 break;
3377         case P2P_PROVISIONING:
3378                 break;
3379         case P2P_PD_DURING_FIND:
3380                 p2p_timeout_prov_disc_during_find(p2p);
3381                 break;
3382         case P2P_INVITE:
3383                 p2p_timeout_invite(p2p);
3384                 break;
3385         case P2P_INVITE_LISTEN:
3386                 p2p_timeout_invite_listen(p2p);
3387                 break;
3388         }
3389 }
3390
3391
3392 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3393 {
3394         struct p2p_device *dev;
3395
3396         dev = p2p_get_device(p2p, peer_addr);
3397         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3398                 MACSTR, MAC2STR(peer_addr));
3399         if (dev == NULL) {
3400                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3401                 return -1;
3402         }
3403         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3404         dev->flags |= P2P_DEV_USER_REJECTED;
3405         return 0;
3406 }
3407
3408
3409 const char * p2p_wps_method_text(enum p2p_wps_method method)
3410 {
3411         switch (method) {
3412         case WPS_NOT_READY:
3413                 return "not-ready";
3414         case WPS_PIN_DISPLAY:
3415                 return "Display";
3416         case WPS_PIN_KEYPAD:
3417                 return "Keypad";
3418         case WPS_PBC:
3419                 return "PBC";
3420         case WPS_NFC:
3421                 return "NFC";
3422         }
3423
3424         return "??";
3425 }
3426
3427
3428 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3429 {
3430         switch (go_state) {
3431         case UNKNOWN_GO:
3432                 return "unknown";
3433         case LOCAL_GO:
3434                 return "local";
3435         case  REMOTE_GO:
3436                 return "remote";
3437         }
3438
3439         return "??";
3440 }
3441
3442
3443 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3444                                                const u8 *addr, int next)
3445 {
3446         struct p2p_device *dev;
3447
3448         if (addr)
3449                 dev = p2p_get_device(p2p, addr);
3450         else
3451                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3452
3453         if (dev && next) {
3454                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3455                 if (&dev->list == &p2p->devices)
3456                         dev = NULL;
3457         }
3458
3459         if (dev == NULL)
3460                 return NULL;
3461
3462         return &dev->info;
3463 }
3464
3465
3466 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3467                           char *buf, size_t buflen)
3468 {
3469         struct p2p_device *dev;
3470         int res;
3471         char *pos, *end;
3472         struct os_reltime now;
3473
3474         if (info == NULL)
3475                 return -1;
3476
3477         dev = (struct p2p_device *) (((u8 *) info) -
3478                                      offsetof(struct p2p_device, info));
3479
3480         pos = buf;
3481         end = buf + buflen;
3482
3483         os_get_reltime(&now);
3484         res = os_snprintf(pos, end - pos,
3485                           "age=%d\n"
3486                           "listen_freq=%d\n"
3487                           "wps_method=%s\n"
3488                           "interface_addr=" MACSTR "\n"
3489                           "member_in_go_dev=" MACSTR "\n"
3490                           "member_in_go_iface=" MACSTR "\n"
3491                           "go_neg_req_sent=%d\n"
3492                           "go_state=%s\n"
3493                           "dialog_token=%u\n"
3494                           "intended_addr=" MACSTR "\n"
3495                           "country=%c%c\n"
3496                           "oper_freq=%d\n"
3497                           "req_config_methods=0x%x\n"
3498                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3499                           "status=%d\n"
3500                           "wait_count=%u\n"
3501                           "invitation_reqs=%u\n",
3502                           (int) (now.sec - dev->last_seen.sec),
3503                           dev->listen_freq,
3504                           p2p_wps_method_text(dev->wps_method),
3505                           MAC2STR(dev->interface_addr),
3506                           MAC2STR(dev->member_in_go_dev),
3507                           MAC2STR(dev->member_in_go_iface),
3508                           dev->go_neg_req_sent,
3509                           p2p_go_state_text(dev->go_state),
3510                           dev->dialog_token,
3511                           MAC2STR(dev->intended_addr),
3512                           dev->country[0] ? dev->country[0] : '_',
3513                           dev->country[1] ? dev->country[1] : '_',
3514                           dev->oper_freq,
3515                           dev->req_config_methods,
3516                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3517                           "[PROBE_REQ_ONLY]" : "",
3518                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3519                           dev->flags & P2P_DEV_NOT_YET_READY ?
3520                           "[NOT_YET_READY]" : "",
3521                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3522                           "[PD_PEER_DISPLAY]" : "",
3523                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3524                           "[PD_PEER_KEYPAD]" : "",
3525                           dev->flags & P2P_DEV_USER_REJECTED ?
3526                           "[USER_REJECTED]" : "",
3527                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3528                           "[PEER_WAITING_RESPONSE]" : "",
3529                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3530                           "[PREFER_PERSISTENT_GROUP]" : "",
3531                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3532                           "[WAIT_GO_NEG_RESPONSE]" : "",
3533                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3534                           "[WAIT_GO_NEG_CONFIRM]" : "",
3535                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3536                           "[GROUP_CLIENT_ONLY]" : "",
3537                           dev->flags & P2P_DEV_FORCE_FREQ ?
3538                           "[FORCE_FREQ]" : "",
3539                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3540                           "[PD_FOR_JOIN]" : "",
3541                           dev->status,
3542                           dev->wait_count,
3543                           dev->invitation_reqs);
3544         if (res < 0 || res >= end - pos)
3545                 return pos - buf;
3546         pos += res;
3547
3548         if (dev->ext_listen_period) {
3549                 res = os_snprintf(pos, end - pos,
3550                                   "ext_listen_period=%u\n"
3551                                   "ext_listen_interval=%u\n",
3552                                   dev->ext_listen_period,
3553                                   dev->ext_listen_interval);
3554                 if (res < 0 || res >= end - pos)
3555                         return pos - buf;
3556                 pos += res;
3557         }
3558
3559         if (dev->oper_ssid_len) {
3560                 res = os_snprintf(pos, end - pos,
3561                                   "oper_ssid=%s\n",
3562                                   wpa_ssid_txt(dev->oper_ssid,
3563                                                dev->oper_ssid_len));
3564                 if (res < 0 || res >= end - pos)
3565                         return pos - buf;
3566                 pos += res;
3567         }
3568
3569 #ifdef CONFIG_WIFI_DISPLAY
3570         if (dev->info.wfd_subelems) {
3571                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3572                 if (res < 0 || res >= end - pos)
3573                         return pos - buf;
3574                 pos += res;
3575
3576                 pos += wpa_snprintf_hex(pos, end - pos,
3577                                         wpabuf_head(dev->info.wfd_subelems),
3578                                         wpabuf_len(dev->info.wfd_subelems));
3579
3580                 res = os_snprintf(pos, end - pos, "\n");
3581                 if (res < 0 || res >= end - pos)
3582                         return pos - buf;
3583                 pos += res;
3584         }
3585 #endif /* CONFIG_WIFI_DISPLAY */
3586
3587         return pos - buf;
3588 }
3589
3590
3591 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3592 {
3593         return p2p_get_device(p2p, addr) != NULL;
3594 }
3595
3596
3597 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3598 {
3599         if (enabled) {
3600                 p2p_dbg(p2p, "Client discoverability enabled");
3601                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3602         } else {
3603                 p2p_dbg(p2p, "Client discoverability disabled");
3604                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3605         }
3606 }
3607
3608
3609 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3610                                               u32 duration2, u32 interval2)
3611 {
3612         struct wpabuf *req;
3613         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3614         u8 *len;
3615
3616         req = wpabuf_alloc(100);
3617         if (req == NULL)
3618                 return NULL;
3619
3620         if (duration1 || interval1) {
3621                 os_memset(&desc1, 0, sizeof(desc1));
3622                 desc1.count_type = 1;
3623                 desc1.duration = duration1;
3624                 desc1.interval = interval1;
3625                 ptr1 = &desc1;
3626
3627                 if (duration2 || interval2) {
3628                         os_memset(&desc2, 0, sizeof(desc2));
3629                         desc2.count_type = 2;
3630                         desc2.duration = duration2;
3631                         desc2.interval = interval2;
3632                         ptr2 = &desc2;
3633                 }
3634         }
3635
3636         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3637         len = p2p_buf_add_ie_hdr(req);
3638         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3639         p2p_buf_update_ie_hdr(req, len);
3640
3641         return req;
3642 }
3643
3644
3645 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3646                      const u8 *own_interface_addr, unsigned int freq,
3647                      u32 duration1, u32 interval1, u32 duration2,
3648                      u32 interval2)
3649 {
3650         struct wpabuf *req;
3651
3652         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3653                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3654                 "dur2=%u int2=%u",
3655                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3656                 freq, duration1, interval1, duration2, interval2);
3657
3658         req = p2p_build_presence_req(duration1, interval1, duration2,
3659                                      interval2);
3660         if (req == NULL)
3661                 return -1;
3662
3663         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3664         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3665                             go_interface_addr,
3666                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3667                 p2p_dbg(p2p, "Failed to send Action frame");
3668         }
3669         wpabuf_free(req);
3670
3671         return 0;
3672 }
3673
3674
3675 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3676                                                size_t noa_len, u8 dialog_token)
3677 {
3678         struct wpabuf *resp;
3679         u8 *len;
3680
3681         resp = wpabuf_alloc(100 + noa_len);
3682         if (resp == NULL)
3683                 return NULL;
3684
3685         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3686         len = p2p_buf_add_ie_hdr(resp);
3687         p2p_buf_add_status(resp, status);
3688         if (noa) {
3689                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3690                 wpabuf_put_le16(resp, noa_len);
3691                 wpabuf_put_data(resp, noa, noa_len);
3692         } else
3693                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3694         p2p_buf_update_ie_hdr(resp, len);
3695
3696         return resp;
3697 }
3698
3699
3700 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3701                                      const u8 *sa, const u8 *data, size_t len,
3702                                      int rx_freq)
3703 {
3704         struct p2p_message msg;
3705         u8 status;
3706         struct wpabuf *resp;
3707         size_t g;
3708         struct p2p_group *group = NULL;
3709         int parsed = 0;
3710         u8 noa[50];
3711         int noa_len;
3712
3713         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3714
3715         for (g = 0; g < p2p->num_groups; g++) {
3716                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3717                               ETH_ALEN) == 0) {
3718                         group = p2p->groups[g];
3719                         break;
3720                 }
3721         }
3722         if (group == NULL) {
3723                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3724                         MACSTR, MAC2STR(da));
3725                 return;
3726         }
3727
3728         if (p2p_parse(data, len, &msg) < 0) {
3729                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3730                 status = P2P_SC_FAIL_INVALID_PARAMS;
3731                 goto fail;
3732         }
3733         parsed = 1;
3734
3735         if (msg.noa == NULL) {
3736                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3737                 status = P2P_SC_FAIL_INVALID_PARAMS;
3738                 goto fail;
3739         }
3740
3741         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3742
3743 fail:
3744         if (p2p->cfg->get_noa)
3745                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3746                                             sizeof(noa));
3747         else
3748                 noa_len = -1;
3749         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3750                                        noa_len > 0 ? noa_len : 0,
3751                                        msg.dialog_token);
3752         if (parsed)
3753                 p2p_parse_free(&msg);
3754         if (resp == NULL)
3755                 return;
3756
3757         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3758         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3759                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3760                 p2p_dbg(p2p, "Failed to send Action frame");
3761         }
3762         wpabuf_free(resp);
3763 }
3764
3765
3766 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3767                                       const u8 *sa, const u8 *data, size_t len)
3768 {
3769         struct p2p_message msg;
3770
3771         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3772
3773         if (p2p_parse(data, len, &msg) < 0) {
3774                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3775                 return;
3776         }
3777
3778         if (msg.status == NULL || msg.noa == NULL) {
3779                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3780                 p2p_parse_free(&msg);
3781                 return;
3782         }
3783
3784         if (p2p->cfg->presence_resp) {
3785                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3786                                         msg.noa, msg.noa_len);
3787         }
3788
3789         if (*msg.status) {
3790                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3791                         *msg.status);
3792                 p2p_parse_free(&msg);
3793                 return;
3794         }
3795
3796         p2p_dbg(p2p, "P2P Presence Request was accepted");
3797         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3798                     msg.noa, msg.noa_len);
3799         /* TODO: process NoA */
3800         p2p_parse_free(&msg);
3801 }
3802
3803
3804 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3805 {
3806         struct p2p_data *p2p = eloop_ctx;
3807
3808         if (p2p->ext_listen_interval) {
3809                 /* Schedule next extended listen timeout */
3810                 eloop_register_timeout(p2p->ext_listen_interval_sec,
3811                                        p2p->ext_listen_interval_usec,
3812                                        p2p_ext_listen_timeout, p2p, NULL);
3813         }
3814
3815         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
3816                 /*
3817                  * This should not really happen, but it looks like the Listen
3818                  * command may fail is something else (e.g., a scan) was
3819                  * running at an inconvenient time. As a workaround, allow new
3820                  * Extended Listen operation to be started.
3821                  */
3822                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
3823                 p2p->ext_listen_only = 0;
3824                 p2p_set_state(p2p, P2P_IDLE);
3825         }
3826
3827         if (p2p->state != P2P_IDLE) {
3828                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
3829                 return;
3830         }
3831
3832         p2p_dbg(p2p, "Extended Listen timeout");
3833         p2p->ext_listen_only = 1;
3834         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
3835                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
3836                 p2p->ext_listen_only = 0;
3837         }
3838 }
3839
3840
3841 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
3842                    unsigned int interval)
3843 {
3844         if (period > 65535 || interval > 65535 || period > interval ||
3845             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
3846                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
3847                         period, interval);
3848                 return -1;
3849         }
3850
3851         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
3852
3853         if (interval == 0) {
3854                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
3855                 p2p->ext_listen_period = 0;
3856                 p2p->ext_listen_interval = 0;
3857                 return 0;
3858         }
3859
3860         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
3861                 period, interval);
3862         p2p->ext_listen_period = period;
3863         p2p->ext_listen_interval = interval;
3864         p2p->ext_listen_interval_sec = interval / 1000;
3865         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
3866
3867         eloop_register_timeout(p2p->ext_listen_interval_sec,
3868                                p2p->ext_listen_interval_usec,
3869                                p2p_ext_listen_timeout, p2p, NULL);
3870
3871         return 0;
3872 }
3873
3874
3875 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3876                       const u8 *ie, size_t ie_len)
3877 {
3878         struct p2p_message msg;
3879
3880         if (bssid == NULL || ie == NULL)
3881                 return;
3882
3883         os_memset(&msg, 0, sizeof(msg));
3884         if (p2p_parse_ies(ie, ie_len, &msg))
3885                 return;
3886         if (msg.minor_reason_code == NULL) {
3887                 p2p_parse_free(&msg);
3888                 return;
3889         }
3890
3891         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
3892                 " reason_code=%u minor_reason_code=%u",
3893                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3894
3895         p2p_parse_free(&msg);
3896 }
3897
3898
3899 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3900                         const u8 *ie, size_t ie_len)
3901 {
3902         struct p2p_message msg;
3903
3904         if (bssid == NULL || ie == NULL)
3905                 return;
3906
3907         os_memset(&msg, 0, sizeof(msg));
3908         if (p2p_parse_ies(ie, ie_len, &msg))
3909                 return;
3910         if (msg.minor_reason_code == NULL) {
3911                 p2p_parse_free(&msg);
3912                 return;
3913         }
3914
3915         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
3916                 " reason_code=%u minor_reason_code=%u",
3917                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3918
3919         p2p_parse_free(&msg);
3920 }
3921
3922
3923 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
3924 {
3925         if (enabled) {
3926                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
3927                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
3928         } else {
3929                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
3930                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
3931         }
3932 }
3933
3934
3935 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
3936 {
3937         if (p2p_channel_to_freq(reg_class, channel) < 0)
3938                 return -1;
3939
3940         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
3941                 reg_class, channel);
3942         p2p->cfg->reg_class = reg_class;
3943         p2p->cfg->channel = channel;
3944
3945         return 0;
3946 }
3947
3948
3949 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
3950 {
3951         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
3952         if (postfix == NULL) {
3953                 p2p->cfg->ssid_postfix_len = 0;
3954                 return 0;
3955         }
3956         if (len > sizeof(p2p->cfg->ssid_postfix))
3957                 return -1;
3958         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
3959         p2p->cfg->ssid_postfix_len = len;
3960         return 0;
3961 }
3962
3963
3964 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
3965                          int cfg_op_channel)
3966 {
3967         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
3968                 return -1;
3969
3970         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
3971                 op_reg_class, op_channel);
3972         p2p->cfg->op_reg_class = op_reg_class;
3973         p2p->cfg->op_channel = op_channel;
3974         p2p->cfg->cfg_op_channel = cfg_op_channel;
3975         return 0;
3976 }
3977
3978
3979 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
3980                       const struct p2p_channel *pref_chan)
3981 {
3982         struct p2p_channel *n;
3983
3984         if (pref_chan) {
3985                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
3986                 if (n == NULL)
3987                         return -1;
3988                 os_memcpy(n, pref_chan,
3989                           num_pref_chan * sizeof(struct p2p_channel));
3990         } else
3991                 n = NULL;
3992
3993         os_free(p2p->cfg->pref_chan);
3994         p2p->cfg->pref_chan = n;
3995         p2p->cfg->num_pref_chan = num_pref_chan;
3996
3997         return 0;
3998 }
3999
4000
4001 int p2p_set_no_go_freq(struct p2p_data *p2p,
4002                        const struct wpa_freq_range_list *list)
4003 {
4004         struct wpa_freq_range *tmp;
4005
4006         if (list == NULL || list->num == 0) {
4007                 os_free(p2p->no_go_freq.range);
4008                 p2p->no_go_freq.range = NULL;
4009                 p2p->no_go_freq.num = 0;
4010                 return 0;
4011         }
4012
4013         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4014         if (tmp == NULL)
4015                 return -1;
4016         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4017         os_free(p2p->no_go_freq.range);
4018         p2p->no_go_freq.range = tmp;
4019         p2p->no_go_freq.num = list->num;
4020         p2p_dbg(p2p, "Updated no GO chan list");
4021
4022         return 0;
4023 }
4024
4025
4026 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4027                            u8 *iface_addr)
4028 {
4029         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4030         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4031                 return -1;
4032         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4033         return 0;
4034 }
4035
4036
4037 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4038                            u8 *dev_addr)
4039 {
4040         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4041         if (dev == NULL)
4042                 return -1;
4043         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4044         return 0;
4045 }
4046
4047
4048 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4049 {
4050         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4051         if (is_zero_ether_addr(p2p->peer_filter))
4052                 p2p_dbg(p2p, "Disable peer filter");
4053         else
4054                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4055                         MAC2STR(p2p->peer_filter));
4056 }
4057
4058
4059 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4060 {
4061         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4062         if (p2p->cross_connect == enabled)
4063                 return;
4064         p2p->cross_connect = enabled;
4065         /* TODO: may need to tear down any action group where we are GO(?) */
4066 }
4067
4068
4069 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4070 {
4071         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4072         if (dev == NULL)
4073                 return -1;
4074         if (dev->oper_freq <= 0)
4075                 return -1;
4076         return dev->oper_freq;
4077 }
4078
4079
4080 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4081 {
4082         p2p_dbg(p2p, "Intra BSS distribution %s",
4083                 enabled ? "enabled" : "disabled");
4084         p2p->cfg->p2p_intra_bss = enabled;
4085 }
4086
4087
4088 void p2p_update_channel_list(struct p2p_data *p2p,
4089                              const struct p2p_channels *chan,
4090                              const struct p2p_channels *cli_chan)
4091 {
4092         p2p_dbg(p2p, "Update channel list");
4093         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4094         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4095         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4096                   sizeof(struct p2p_channels));
4097         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4098 }
4099
4100
4101 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4102                     const u8 *src, const u8 *bssid, const u8 *buf,
4103                     size_t len, unsigned int wait_time)
4104 {
4105         if (p2p->p2p_scan_running) {
4106                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4107                 if (p2p->after_scan_tx) {
4108                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4109                         os_free(p2p->after_scan_tx);
4110                 }
4111                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4112                                                len);
4113                 if (p2p->after_scan_tx == NULL)
4114                         return -1;
4115                 p2p->after_scan_tx->freq = freq;
4116                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4117                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4118                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4119                 p2p->after_scan_tx->len = len;
4120                 p2p->after_scan_tx->wait_time = wait_time;
4121                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4122                 return 0;
4123         }
4124
4125         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4126                                      buf, len, wait_time);
4127 }
4128
4129
4130 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4131                            int freq_overall)
4132 {
4133         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4134                 freq_24, freq_5, freq_overall);
4135         p2p->best_freq_24 = freq_24;
4136         p2p->best_freq_5 = freq_5;
4137         p2p->best_freq_overall = freq_overall;
4138 }
4139
4140
4141 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4142 {
4143         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4144         p2p->own_freq_preference = freq;
4145 }
4146
4147
4148 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4149 {
4150         if (p2p == NULL || p2p->go_neg_peer == NULL)
4151                 return NULL;
4152         return p2p->go_neg_peer->info.p2p_device_addr;
4153 }
4154
4155
4156 const struct p2p_peer_info *
4157 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4158 {
4159         struct p2p_device *dev;
4160
4161         if (addr) {
4162                 dev = p2p_get_device(p2p, addr);
4163                 if (!dev)
4164                         return NULL;
4165
4166                 if (!next) {
4167                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4168                                 return NULL;
4169
4170                         return &dev->info;
4171                 } else {
4172                         do {
4173                                 dev = dl_list_first(&dev->list,
4174                                                     struct p2p_device,
4175                                                     list);
4176                                 if (&dev->list == &p2p->devices)
4177                                         return NULL;
4178                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4179                 }
4180         } else {
4181                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4182                 if (!dev)
4183                         return NULL;
4184                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4185                         dev = dl_list_first(&dev->list,
4186                                             struct p2p_device,
4187                                             list);
4188                         if (&dev->list == &p2p->devices)
4189                                 return NULL;
4190                 }
4191         }
4192
4193         return &dev->info;
4194 }
4195
4196
4197 int p2p_in_progress(struct p2p_data *p2p)
4198 {
4199         if (p2p == NULL)
4200                 return 0;
4201         if (p2p->state == P2P_SEARCH)
4202                 return 2;
4203         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4204 }
4205
4206
4207 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4208                             u8 client_timeout)
4209 {
4210         if (p2p) {
4211                 p2p->go_timeout = go_timeout;
4212                 p2p->client_timeout = client_timeout;
4213         }
4214 }
4215
4216
4217 #ifdef CONFIG_WIFI_DISPLAY
4218
4219 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4220 {
4221         size_t g;
4222         struct p2p_group *group;
4223
4224         for (g = 0; g < p2p->num_groups; g++) {
4225                 group = p2p->groups[g];
4226                 p2p_group_force_beacon_update_ies(group);
4227         }
4228 }
4229
4230
4231 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4232 {
4233         wpabuf_free(p2p->wfd_ie_beacon);
4234         p2p->wfd_ie_beacon = ie;
4235         p2p_update_wfd_ie_groups(p2p);
4236         return 0;
4237 }
4238
4239
4240 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4241 {
4242         wpabuf_free(p2p->wfd_ie_probe_req);
4243         p2p->wfd_ie_probe_req = ie;
4244         return 0;
4245 }
4246
4247
4248 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4249 {
4250         wpabuf_free(p2p->wfd_ie_probe_resp);
4251         p2p->wfd_ie_probe_resp = ie;
4252         p2p_update_wfd_ie_groups(p2p);
4253         return 0;
4254 }
4255
4256
4257 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4258 {
4259         wpabuf_free(p2p->wfd_ie_assoc_req);
4260         p2p->wfd_ie_assoc_req = ie;
4261         return 0;
4262 }
4263
4264
4265 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4266 {
4267         wpabuf_free(p2p->wfd_ie_invitation);
4268         p2p->wfd_ie_invitation = ie;
4269         return 0;
4270 }
4271
4272
4273 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4274 {
4275         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4276         p2p->wfd_ie_prov_disc_req = ie;
4277         return 0;
4278 }
4279
4280
4281 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4282 {
4283         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4284         p2p->wfd_ie_prov_disc_resp = ie;
4285         return 0;
4286 }
4287
4288
4289 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4290 {
4291         wpabuf_free(p2p->wfd_ie_go_neg);
4292         p2p->wfd_ie_go_neg = ie;
4293         return 0;
4294 }
4295
4296
4297 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4298 {
4299         wpabuf_free(p2p->wfd_dev_info);
4300         if (elem) {
4301                 p2p->wfd_dev_info = wpabuf_dup(elem);
4302                 if (p2p->wfd_dev_info == NULL)
4303                         return -1;
4304         } else
4305                 p2p->wfd_dev_info = NULL;
4306
4307         return 0;
4308 }
4309
4310
4311 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4312 {
4313         wpabuf_free(p2p->wfd_assoc_bssid);
4314         if (elem) {
4315                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4316                 if (p2p->wfd_assoc_bssid == NULL)
4317                         return -1;
4318         } else
4319                 p2p->wfd_assoc_bssid = NULL;
4320
4321         return 0;
4322 }
4323
4324
4325 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4326                                   const struct wpabuf *elem)
4327 {
4328         wpabuf_free(p2p->wfd_coupled_sink_info);
4329         if (elem) {
4330                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4331                 if (p2p->wfd_coupled_sink_info == NULL)
4332                         return -1;
4333         } else
4334                 p2p->wfd_coupled_sink_info = NULL;
4335
4336         return 0;
4337 }
4338
4339 #endif /* CONFIG_WIFI_DISPLAY */
4340
4341
4342 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4343                      int max_disc_tu)
4344 {
4345         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4346                 return -1;
4347
4348         p2p->min_disc_int = min_disc_int;
4349         p2p->max_disc_int = max_disc_int;
4350         p2p->max_disc_tu = max_disc_tu;
4351         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4352                 min_disc_int, max_disc_int, max_disc_tu);
4353
4354         return 0;
4355 }
4356
4357
4358 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4359 {
4360         va_list ap;
4361         char buf[500];
4362
4363         if (!p2p->cfg->debug_print)
4364                 return;
4365
4366         va_start(ap, fmt);
4367         vsnprintf(buf, sizeof(buf), fmt, ap);
4368         buf[sizeof(buf) - 1] = '\0';
4369         va_end(ap);
4370         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4371 }
4372
4373
4374 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4375 {
4376         va_list ap;
4377         char buf[500];
4378
4379         if (!p2p->cfg->debug_print)
4380                 return;
4381
4382         va_start(ap, fmt);
4383         vsnprintf(buf, sizeof(buf), fmt, ap);
4384         buf[sizeof(buf) - 1] = '\0';
4385         va_end(ap);
4386         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4387 }
4388
4389
4390 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4391 {
4392         va_list ap;
4393         char buf[500];
4394
4395         if (!p2p->cfg->debug_print)
4396                 return;
4397
4398         va_start(ap, fmt);
4399         vsnprintf(buf, sizeof(buf), fmt, ap);
4400         buf[sizeof(buf) - 1] = '\0';
4401         va_end(ap);
4402         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4403 }
4404
4405
4406 #ifdef CONFIG_WPS_NFC
4407
4408 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4409                                               int client_freq,
4410                                               const u8 *go_dev_addr,
4411                                               const u8 *ssid, size_t ssid_len)
4412 {
4413         struct wpabuf *buf;
4414         u8 op_class, channel;
4415         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4416
4417         buf = wpabuf_alloc(1000);
4418         if (buf == NULL)
4419                 return NULL;
4420
4421         op_class = p2p->cfg->reg_class;
4422         channel = p2p->cfg->channel;
4423
4424         p2p_buf_add_capability(buf, p2p->dev_capab &
4425                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4426         p2p_buf_add_device_info(buf, p2p, NULL);
4427
4428         if (p2p->num_groups > 0) {
4429                 role = P2P_GO_IN_A_GROUP;
4430                 p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]),
4431                                     &op_class, &channel);
4432         } else if (client_freq > 0) {
4433                 role = P2P_CLIENT_IN_A_GROUP;
4434                 p2p_freq_to_channel(client_freq, &op_class, &channel);
4435         }
4436
4437         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4438                                        channel, role);
4439
4440         if (p2p->num_groups > 0) {
4441                 /* Limit number of clients to avoid very long message */
4442                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4443                 p2p_group_buf_add_id(p2p->groups[0], buf);
4444         } else if (client_freq > 0 &&
4445                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4446                    ssid && ssid_len > 0) {
4447                 /*
4448                  * Add the optional P2P Group ID to indicate in which group this
4449                  * device is a P2P Client.
4450                  */
4451                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4452         }
4453
4454         return buf;
4455 }
4456
4457
4458 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4459                                            int client_freq,
4460                                            const u8 *go_dev_addr,
4461                                            const u8 *ssid, size_t ssid_len)
4462 {
4463         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4464                                       ssid_len);
4465 }
4466
4467
4468 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4469                                            int client_freq,
4470                                            const u8 *go_dev_addr,
4471                                            const u8 *ssid, size_t ssid_len)
4472 {
4473         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4474                                       ssid_len);
4475 }
4476
4477
4478 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4479                                         struct p2p_nfc_params *params)
4480 {
4481         struct p2p_message msg;
4482         struct p2p_device *dev;
4483         const u8 *p2p_dev_addr;
4484         int freq;
4485         enum p2p_role_indication role;
4486
4487         params->next_step = NO_ACTION;
4488
4489         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4490                                    params->p2p_attr, params->p2p_len, &msg)) {
4491                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4492                 p2p_parse_free(&msg);
4493                 return -1;
4494         }
4495
4496         if (msg.p2p_device_addr)
4497                 p2p_dev_addr = msg.p2p_device_addr;
4498         else if (msg.device_id)
4499                 p2p_dev_addr = msg.device_id;
4500         else {
4501                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4502                 p2p_parse_free(&msg);
4503                 return -1;
4504         }
4505
4506         if (msg.oob_dev_password) {
4507                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4508                           msg.oob_dev_password_len);
4509                 params->oob_dev_pw_len = msg.oob_dev_password_len;
4510         }
4511
4512         dev = p2p_create_device(p2p, p2p_dev_addr);
4513         if (dev == NULL) {
4514                 p2p_parse_free(&msg);
4515                 return -1;
4516         }
4517
4518         params->peer = &dev->info;
4519
4520         os_get_reltime(&dev->last_seen);
4521         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4522         p2p_copy_wps_info(p2p, dev, 0, &msg);
4523
4524         if (!msg.oob_go_neg_channel) {
4525                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4526                 return -1;
4527         }
4528
4529         if (msg.oob_go_neg_channel[3] == 0 &&
4530             msg.oob_go_neg_channel[4] == 0)
4531                 freq = 0;
4532         else
4533                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4534                                            msg.oob_go_neg_channel[4]);
4535         if (freq < 0) {
4536                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4537                 return -1;
4538         }
4539         role = msg.oob_go_neg_channel[5];
4540
4541         if (role == P2P_GO_IN_A_GROUP) {
4542                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4543                 params->go_freq = freq;
4544         } else if (role == P2P_CLIENT_IN_A_GROUP) {
4545                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4546                         freq);
4547                 params->go_freq = freq;
4548         } else
4549                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4550         dev->oob_go_neg_freq = freq;
4551
4552         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4553                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4554                                            p2p->cfg->channel);
4555                 if (freq < 0) {
4556                         p2p_dbg(p2p, "Own listen channel not known");
4557                         return -1;
4558                 }
4559                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4560                 dev->oob_go_neg_freq = freq;
4561         }
4562
4563         if (msg.group_id) {
4564                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4565                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4566                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4567                           params->go_ssid_len);
4568         }
4569
4570         p2p_parse_free(&msg);
4571
4572         if (dev->flags & P2P_DEV_USER_REJECTED) {
4573                 p2p_dbg(p2p, "Do not report rejected device");
4574                 return 0;
4575         }
4576
4577         if (!(dev->flags & P2P_DEV_REPORTED)) {
4578                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4579                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
4580                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4581         }
4582
4583         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4584                 params->next_step = BOTH_GO;
4585         else if (role == P2P_GO_IN_A_GROUP)
4586                 params->next_step = JOIN_GROUP;
4587         else if (role == P2P_CLIENT_IN_A_GROUP) {
4588                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4589                 params->next_step = PEER_CLIENT;
4590         } else if (p2p->num_groups > 0)
4591                 params->next_step = AUTH_JOIN;
4592         else if (params->sel)
4593                 params->next_step = INIT_GO_NEG;
4594         else
4595                 params->next_step = RESP_GO_NEG;
4596
4597         return 0;
4598 }
4599
4600
4601 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4602                                       int go_intent,
4603                                       const u8 *own_interface_addr)
4604 {
4605
4606         p2p->authorized_oob_dev_pw_id = dev_pw_id;
4607         if (dev_pw_id == 0) {
4608                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4609                 return;
4610         }
4611
4612         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4613                 dev_pw_id);
4614
4615         p2p->go_intent = go_intent;
4616         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4617 }
4618
4619 #endif /* CONFIG_WPS_NFC */