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 {
1212                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1213                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1214                 p2p->op_channel = p2p->cfg->op_channel;
1215         }
1216
1217         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1218                   sizeof(struct p2p_channels));
1219 }
1220
1221
1222 /**
1223  * p2p_prepare_channel - Select operating channel for GO Negotiation
1224  * @p2p: P2P module context from p2p_init()
1225  * @dev: Selected peer device
1226  * @force_freq: Forced frequency in MHz or 0 if not forced
1227  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1228  * @go: Whether the local end will be forced to be GO
1229  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1230  *
1231  * This function is used to do initial operating channel selection for GO
1232  * Negotiation prior to having received peer information. The selected channel
1233  * may be further optimized in p2p_reselect_channel() once the peer information
1234  * is available.
1235  */
1236 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1237                         unsigned int force_freq, unsigned int pref_freq, int go)
1238 {
1239         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1240                 force_freq, pref_freq, go);
1241         if (force_freq || pref_freq) {
1242                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1243                     0)
1244                         return -1;
1245         } else {
1246                 p2p_prepare_channel_best(p2p);
1247         }
1248         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1249         if (go)
1250                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1251         else if (!force_freq)
1252                 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1253                                    &p2p->channels);
1254         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1255
1256         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1257                 p2p->op_reg_class, p2p->op_channel,
1258                 force_freq ? " (forced)" : "");
1259
1260         if (force_freq)
1261                 dev->flags |= P2P_DEV_FORCE_FREQ;
1262         else
1263                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1264
1265         return 0;
1266 }
1267
1268
1269 static void p2p_set_dev_persistent(struct p2p_device *dev,
1270                                    int persistent_group)
1271 {
1272         switch (persistent_group) {
1273         case 0:
1274                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1275                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1276                 break;
1277         case 1:
1278                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1279                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1280                 break;
1281         case 2:
1282                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1283                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1284                 break;
1285         }
1286 }
1287
1288
1289 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1290                 enum p2p_wps_method wps_method,
1291                 int go_intent, const u8 *own_interface_addr,
1292                 unsigned int force_freq, int persistent_group,
1293                 const u8 *force_ssid, size_t force_ssid_len,
1294                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1295 {
1296         struct p2p_device *dev;
1297
1298         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1299                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1300                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1301                 "oob_pw_id=%u",
1302                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1303                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1304
1305         dev = p2p_get_device(p2p, peer_addr);
1306         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1307                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1308                         MAC2STR(peer_addr));
1309                 return -1;
1310         }
1311
1312         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1313                                 go_intent == 15) < 0)
1314                 return -1;
1315
1316         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1317                 if (!(dev->info.dev_capab &
1318                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1319                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1320                                 " that is in a group and is not discoverable",
1321                                 MAC2STR(peer_addr));
1322                         return -1;
1323                 }
1324                 if (dev->oper_freq <= 0) {
1325                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1326                                 " with incomplete information",
1327                                 MAC2STR(peer_addr));
1328                         return -1;
1329                 }
1330
1331                 /*
1332                  * First, try to connect directly. If the peer does not
1333                  * acknowledge frames, assume it is sleeping and use device
1334                  * discoverability via the GO at that point.
1335                  */
1336         }
1337
1338         p2p->ssid_set = 0;
1339         if (force_ssid) {
1340                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1341                                   force_ssid, force_ssid_len);
1342                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1343                 p2p->ssid_len = force_ssid_len;
1344                 p2p->ssid_set = 1;
1345         }
1346
1347         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1348         dev->flags &= ~P2P_DEV_USER_REJECTED;
1349         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1350         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1351         if (pd_before_go_neg)
1352                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1353         else {
1354                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1355                 /*
1356                  * Assign dialog token and tie breaker here to use the same
1357                  * values in each retry within the same GO Negotiation exchange.
1358                  */
1359                 dev->dialog_token++;
1360                 if (dev->dialog_token == 0)
1361                         dev->dialog_token = 1;
1362                 dev->tie_breaker = p2p->next_tie_breaker;
1363                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1364         }
1365         dev->connect_reqs = 0;
1366         dev->go_neg_req_sent = 0;
1367         dev->go_state = UNKNOWN_GO;
1368         p2p_set_dev_persistent(dev, persistent_group);
1369         p2p->go_intent = go_intent;
1370         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1371
1372         if (p2p->state != P2P_IDLE)
1373                 p2p_stop_find(p2p);
1374
1375         if (p2p->after_scan_tx) {
1376                 /*
1377                  * We need to drop the pending frame to avoid issues with the
1378                  * new GO Negotiation, e.g., when the pending frame was from a
1379                  * previous attempt at starting a GO Negotiation.
1380                  */
1381                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1382                 os_free(p2p->after_scan_tx);
1383                 p2p->after_scan_tx = NULL;
1384         }
1385
1386         dev->wps_method = wps_method;
1387         dev->oob_pw_id = oob_pw_id;
1388         dev->status = P2P_SC_SUCCESS;
1389
1390         if (p2p->p2p_scan_running) {
1391                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1392                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1393                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1394                 return 0;
1395         }
1396         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1397
1398         return p2p_connect_send(p2p, dev);
1399 }
1400
1401
1402 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1403                   enum p2p_wps_method wps_method,
1404                   int go_intent, const u8 *own_interface_addr,
1405                   unsigned int force_freq, int persistent_group,
1406                   const u8 *force_ssid, size_t force_ssid_len,
1407                   unsigned int pref_freq, u16 oob_pw_id)
1408 {
1409         struct p2p_device *dev;
1410
1411         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1412                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1413                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1414                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1415                 wps_method, persistent_group, oob_pw_id);
1416
1417         dev = p2p_get_device(p2p, peer_addr);
1418         if (dev == NULL) {
1419                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1420                         MAC2STR(peer_addr));
1421                 return -1;
1422         }
1423
1424         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1425                                 15) < 0)
1426                 return -1;
1427
1428         p2p->ssid_set = 0;
1429         if (force_ssid) {
1430                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1431                                   force_ssid, force_ssid_len);
1432                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1433                 p2p->ssid_len = force_ssid_len;
1434                 p2p->ssid_set = 1;
1435         }
1436
1437         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1438         dev->flags &= ~P2P_DEV_USER_REJECTED;
1439         dev->go_neg_req_sent = 0;
1440         dev->go_state = UNKNOWN_GO;
1441         p2p_set_dev_persistent(dev, persistent_group);
1442         p2p->go_intent = go_intent;
1443         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1444
1445         dev->wps_method = wps_method;
1446         dev->oob_pw_id = oob_pw_id;
1447         dev->status = P2P_SC_SUCCESS;
1448
1449         return 0;
1450 }
1451
1452
1453 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1454                       struct p2p_device *dev, struct p2p_message *msg)
1455 {
1456         os_get_reltime(&dev->last_seen);
1457
1458         p2p_copy_wps_info(p2p, dev, 0, msg);
1459
1460         if (msg->listen_channel) {
1461                 int freq;
1462                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1463                                            msg->listen_channel[4]);
1464                 if (freq < 0) {
1465                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1466                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1467                                 msg->listen_channel[0],
1468                                 msg->listen_channel[1],
1469                                 msg->listen_channel[2],
1470                                 msg->listen_channel[3],
1471                                 msg->listen_channel[4]);
1472                 } else {
1473                         p2p_dbg(p2p, "Update peer " MACSTR
1474                                 " Listen channel: %u -> %u MHz",
1475                                 MAC2STR(dev->info.p2p_device_addr),
1476                                 dev->listen_freq, freq);
1477                         dev->listen_freq = freq;
1478                 }
1479         }
1480
1481         if (msg->wfd_subelems) {
1482                 wpabuf_free(dev->info.wfd_subelems);
1483                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1484         }
1485
1486         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1487                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1488                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1489         } else {
1490                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1491                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1492                         "listen_freq=%d",
1493                         MAC2STR(dev->info.p2p_device_addr),
1494                         dev->info.dev_capab, dev->info.group_capab,
1495                         dev->info.device_name, dev->listen_freq);
1496         }
1497
1498         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1499
1500         if (dev->flags & P2P_DEV_USER_REJECTED) {
1501                 p2p_dbg(p2p, "Do not report rejected device");
1502                 return;
1503         }
1504
1505         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1506                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1507         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1508 }
1509
1510
1511 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1512 {
1513         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1514         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1515         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1516                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1517         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1518 }
1519
1520
1521 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1522 {
1523         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1524         p2p_random(params->passphrase, 8);
1525         return 0;
1526 }
1527
1528
1529 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1530 {
1531         struct p2p_go_neg_results res;
1532         int go = peer->go_state == LOCAL_GO;
1533         struct p2p_channels intersection;
1534         int freqs;
1535         size_t i, j;
1536
1537         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1538                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1539
1540         os_memset(&res, 0, sizeof(res));
1541         res.role_go = go;
1542         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1543         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1544         res.wps_method = peer->wps_method;
1545         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1546                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1547                         res.persistent_group = 2;
1548                 else
1549                         res.persistent_group = 1;
1550         }
1551
1552         if (go) {
1553                 /* Setup AP mode for WPS provisioning */
1554                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1555                                                p2p->op_channel);
1556                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1557                 res.ssid_len = p2p->ssid_len;
1558                 p2p_random(res.passphrase, 8);
1559         } else {
1560                 res.freq = peer->oper_freq;
1561                 if (p2p->ssid_len) {
1562                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1563                         res.ssid_len = p2p->ssid_len;
1564                 }
1565         }
1566
1567         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1568         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1569         p2p_channels_intersect(&p2p->channels, &peer->channels,
1570                                &intersection);
1571         if (go) {
1572                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1573                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1574                                   &intersection);
1575         }
1576         freqs = 0;
1577         for (i = 0; i < intersection.reg_classes; i++) {
1578                 struct p2p_reg_class *c = &intersection.reg_class[i];
1579                 if (freqs + 1 == P2P_MAX_CHANNELS)
1580                         break;
1581                 for (j = 0; j < c->channels; j++) {
1582                         int freq;
1583                         if (freqs + 1 == P2P_MAX_CHANNELS)
1584                                 break;
1585                         freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1586                         if (freq < 0)
1587                                 continue;
1588                         res.freq_list[freqs++] = freq;
1589                 }
1590         }
1591
1592         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1593
1594         p2p_clear_timeout(p2p);
1595         p2p->ssid_set = 0;
1596         peer->go_neg_req_sent = 0;
1597         peer->wps_method = WPS_NOT_READY;
1598         peer->oob_pw_id = 0;
1599
1600         p2p_set_state(p2p, P2P_PROVISIONING);
1601         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1602 }
1603
1604
1605 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1606                               const u8 *data, size_t len, int rx_freq)
1607 {
1608         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1609         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1610
1611         if (len < 1)
1612                 return;
1613
1614         switch (data[0]) {
1615         case P2P_GO_NEG_REQ:
1616                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1617                 break;
1618         case P2P_GO_NEG_RESP:
1619                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1620                 break;
1621         case P2P_GO_NEG_CONF:
1622                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1623                 break;
1624         case P2P_INVITATION_REQ:
1625                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1626                                            rx_freq);
1627                 break;
1628         case P2P_INVITATION_RESP:
1629                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1630                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1631                 break;
1632         case P2P_PROV_DISC_REQ:
1633                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1634                 break;
1635         case P2P_PROV_DISC_RESP:
1636                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1637                 break;
1638         case P2P_DEV_DISC_REQ:
1639                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1640                 break;
1641         case P2P_DEV_DISC_RESP:
1642                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1643                 break;
1644         default:
1645                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1646                         data[0]);
1647                 break;
1648         }
1649 }
1650
1651
1652 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1653                                  const u8 *sa, const u8 *bssid, const u8 *data,
1654                                  size_t len, int freq)
1655 {
1656         if (len < 1)
1657                 return;
1658
1659         switch (data[0]) {
1660         case WLAN_PA_VENDOR_SPECIFIC:
1661                 data++;
1662                 len--;
1663                 if (len < 3)
1664                         return;
1665                 if (WPA_GET_BE24(data) != OUI_WFA)
1666                         return;
1667
1668                 data += 3;
1669                 len -= 3;
1670                 if (len < 1)
1671                         return;
1672
1673                 if (*data != P2P_OUI_TYPE)
1674                         return;
1675
1676                 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq);
1677                 break;
1678         case WLAN_PA_GAS_INITIAL_REQ:
1679                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1680                 break;
1681         case WLAN_PA_GAS_INITIAL_RESP:
1682                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1683                 break;
1684         case WLAN_PA_GAS_COMEBACK_REQ:
1685                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1686                 break;
1687         case WLAN_PA_GAS_COMEBACK_RESP:
1688                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1689                 break;
1690         }
1691 }
1692
1693
1694 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1695                    const u8 *bssid, u8 category,
1696                    const u8 *data, size_t len, int freq)
1697 {
1698         if (category == WLAN_ACTION_PUBLIC) {
1699                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1700                 return;
1701         }
1702
1703         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1704                 return;
1705
1706         if (len < 4)
1707                 return;
1708
1709         if (WPA_GET_BE24(data) != OUI_WFA)
1710                 return;
1711         data += 3;
1712         len -= 3;
1713
1714         if (*data != P2P_OUI_TYPE)
1715                 return;
1716         data++;
1717         len--;
1718
1719         /* P2P action frame */
1720         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1721         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1722
1723         if (len < 1)
1724                 return;
1725         switch (data[0]) {
1726         case P2P_NOA:
1727                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1728                 /* TODO */
1729                 break;
1730         case P2P_PRESENCE_REQ:
1731                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1732                 break;
1733         case P2P_PRESENCE_RESP:
1734                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1735                 break;
1736         case P2P_GO_DISC_REQ:
1737                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1738                 break;
1739         default:
1740                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1741                 break;
1742         }
1743 }
1744
1745
1746 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1747 {
1748         struct p2p_data *p2p = eloop_ctx;
1749         if (p2p->go_neg_peer == NULL)
1750                 return;
1751         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1752         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1753         p2p_connect_send(p2p, p2p->go_neg_peer);
1754 }
1755
1756
1757 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1758 {
1759         struct p2p_data *p2p = eloop_ctx;
1760         if (p2p->invite_peer == NULL)
1761                 return;
1762         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1763         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1764                         p2p->invite_dev_pw_id);
1765 }
1766
1767
1768 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1769                                        const u8 *ie, size_t ie_len)
1770 {
1771         struct p2p_message msg;
1772         struct p2p_device *dev;
1773
1774         os_memset(&msg, 0, sizeof(msg));
1775         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1776         {
1777                 p2p_parse_free(&msg);
1778                 return; /* not a P2P probe */
1779         }
1780
1781         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1782             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1783             != 0) {
1784                 /* The Probe Request is not part of P2P Device Discovery. It is
1785                  * not known whether the source address of the frame is the P2P
1786                  * Device Address or P2P Interface Address. Do not add a new
1787                  * peer entry based on this frames.
1788                  */
1789                 p2p_parse_free(&msg);
1790                 return;
1791         }
1792
1793         dev = p2p_get_device(p2p, addr);
1794         if (dev) {
1795                 if (dev->country[0] == 0 && msg.listen_channel)
1796                         os_memcpy(dev->country, msg.listen_channel, 3);
1797                 os_get_reltime(&dev->last_seen);
1798                 p2p_parse_free(&msg);
1799                 return; /* already known */
1800         }
1801
1802         dev = p2p_create_device(p2p, addr);
1803         if (dev == NULL) {
1804                 p2p_parse_free(&msg);
1805                 return;
1806         }
1807
1808         os_get_reltime(&dev->last_seen);
1809         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1810
1811         if (msg.listen_channel) {
1812                 os_memcpy(dev->country, msg.listen_channel, 3);
1813                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1814                                                        msg.listen_channel[4]);
1815         }
1816
1817         p2p_copy_wps_info(p2p, dev, 1, &msg);
1818
1819         if (msg.wfd_subelems) {
1820                 wpabuf_free(dev->info.wfd_subelems);
1821                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1822         }
1823
1824         p2p_parse_free(&msg);
1825
1826         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1827                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1828                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1829                 dev->info.group_capab, dev->info.device_name,
1830                 dev->listen_freq);
1831 }
1832
1833
1834 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1835                                                 const u8 *addr,
1836                                                 struct p2p_message *msg)
1837 {
1838         struct p2p_device *dev;
1839
1840         dev = p2p_get_device(p2p, addr);
1841         if (dev) {
1842                 os_get_reltime(&dev->last_seen);
1843                 return dev; /* already known */
1844         }
1845
1846         dev = p2p_create_device(p2p, addr);
1847         if (dev == NULL)
1848                 return NULL;
1849
1850         p2p_add_dev_info(p2p, addr, dev, msg);
1851
1852         return dev;
1853 }
1854
1855
1856 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1857 {
1858         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1859                 return 1;
1860         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1861             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1862             WPA_GET_BE16(&req_dev_type[6]) == 0)
1863                 return 1; /* Category match with wildcard OUI/sub-category */
1864         return 0;
1865 }
1866
1867
1868 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1869                         size_t num_req_dev_type)
1870 {
1871         size_t i;
1872         for (i = 0; i < num_req_dev_type; i++) {
1873                 if (dev_type_match(dev_type, req_dev_type[i]))
1874                         return 1;
1875         }
1876         return 0;
1877 }
1878
1879
1880 /**
1881  * p2p_match_dev_type - Match local device type with requested type
1882  * @p2p: P2P module context from p2p_init()
1883  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1884  * Returns: 1 on match, 0 on mismatch
1885  *
1886  * This function can be used to match the Requested Device Type attribute in
1887  * WPS IE with the local device types for deciding whether to reply to a Probe
1888  * Request frame.
1889  */
1890 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1891 {
1892         struct wps_parse_attr attr;
1893         size_t i;
1894
1895         if (wps_parse_msg(wps, &attr))
1896                 return 1; /* assume no Requested Device Type attributes */
1897
1898         if (attr.num_req_dev_type == 0)
1899                 return 1; /* no Requested Device Type attributes -> match */
1900
1901         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1902                                 attr.num_req_dev_type))
1903                 return 1; /* Own Primary Device Type matches */
1904
1905         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1906                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1907                                         attr.req_dev_type,
1908                                         attr.num_req_dev_type))
1909                 return 1; /* Own Secondary Device Type matches */
1910
1911         /* No matching device type found */
1912         return 0;
1913 }
1914
1915
1916 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1917 {
1918         struct wpabuf *buf;
1919         u8 *len;
1920         int pw_id = -1;
1921         size_t extra = 0;
1922
1923 #ifdef CONFIG_WIFI_DISPLAY
1924         if (p2p->wfd_ie_probe_resp)
1925                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
1926 #endif /* CONFIG_WIFI_DISPLAY */
1927
1928         buf = wpabuf_alloc(1000 + extra);
1929         if (buf == NULL)
1930                 return NULL;
1931
1932         if (p2p->go_neg_peer) {
1933                 /* Advertise immediate availability of WPS credential */
1934                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
1935         }
1936
1937         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
1938                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
1939                 wpabuf_free(buf);
1940                 return NULL;
1941         }
1942
1943 #ifdef CONFIG_WIFI_DISPLAY
1944         if (p2p->wfd_ie_probe_resp)
1945                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
1946 #endif /* CONFIG_WIFI_DISPLAY */
1947
1948         /* P2P IE */
1949         len = p2p_buf_add_ie_hdr(buf);
1950         p2p_buf_add_capability(buf, p2p->dev_capab &
1951                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
1952         if (p2p->ext_listen_interval)
1953                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
1954                                               p2p->ext_listen_interval);
1955         p2p_buf_add_device_info(buf, p2p, NULL);
1956         p2p_buf_update_ie_hdr(buf, len);
1957
1958         return buf;
1959 }
1960
1961
1962 static enum p2p_probe_req_status
1963 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
1964                 const u8 *bssid, const u8 *ie, size_t ie_len)
1965 {
1966         struct ieee802_11_elems elems;
1967         struct wpabuf *buf;
1968         struct ieee80211_mgmt *resp;
1969         struct p2p_message msg;
1970         struct wpabuf *ies;
1971
1972         if (!p2p->in_listen || !p2p->drv_in_listen) {
1973                 /* not in Listen state - ignore Probe Request */
1974                 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
1975                         p2p->in_listen, p2p->drv_in_listen);
1976                 return P2P_PREQ_NOT_LISTEN;
1977         }
1978
1979         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
1980             ParseFailed) {
1981                 /* Ignore invalid Probe Request frames */
1982                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
1983                 return P2P_PREQ_MALFORMED;
1984         }
1985
1986         if (elems.p2p == NULL) {
1987                 /* not a P2P probe - ignore it */
1988                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
1989                 return P2P_PREQ_NOT_P2P;
1990         }
1991
1992         if (dst && !is_broadcast_ether_addr(dst) &&
1993             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
1994                 /* Not sent to the broadcast address or our P2P Device Address
1995                  */
1996                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
1997                         MAC2STR(dst));
1998                 return P2P_PREQ_NOT_PROCESSED;
1999         }
2000
2001         if (bssid && !is_broadcast_ether_addr(bssid)) {
2002                 /* Not sent to the Wildcard BSSID */
2003                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2004                         MAC2STR(bssid));
2005                 return P2P_PREQ_NOT_PROCESSED;
2006         }
2007
2008         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2009             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2010             0) {
2011                 /* not using P2P Wildcard SSID - ignore */
2012                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2013                 return P2P_PREQ_NOT_PROCESSED;
2014         }
2015
2016         if (supp_rates_11b_only(&elems)) {
2017                 /* Indicates support for 11b rates only */
2018                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2019                 return P2P_PREQ_NOT_P2P;
2020         }
2021
2022         os_memset(&msg, 0, sizeof(msg));
2023         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2024                 /* Could not parse P2P attributes */
2025                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2026                 return P2P_PREQ_NOT_P2P;
2027         }
2028
2029         if (msg.device_id &&
2030             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2031                 /* Device ID did not match */
2032                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2033                         MAC2STR(msg.device_id));
2034                 p2p_parse_free(&msg);
2035                 return P2P_PREQ_NOT_PROCESSED;
2036         }
2037
2038         /* Check Requested Device Type match */
2039         if (msg.wps_attributes &&
2040             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2041                 /* No match with Requested Device Type */
2042                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2043                 p2p_parse_free(&msg);
2044                 return P2P_PREQ_NOT_PROCESSED;
2045         }
2046         p2p_parse_free(&msg);
2047
2048         if (!p2p->cfg->send_probe_resp) {
2049                 /* Response generated elsewhere */
2050                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2051                 return P2P_PREQ_NOT_PROCESSED;
2052         }
2053
2054         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2055
2056         /*
2057          * We do not really have a specific BSS that this frame is advertising,
2058          * so build a frame that has some information in valid format. This is
2059          * really only used for discovery purposes, not to learn exact BSS
2060          * parameters.
2061          */
2062         ies = p2p_build_probe_resp_ies(p2p);
2063         if (ies == NULL)
2064                 return P2P_PREQ_NOT_PROCESSED;
2065
2066         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2067         if (buf == NULL) {
2068                 wpabuf_free(ies);
2069                 return P2P_PREQ_NOT_PROCESSED;
2070         }
2071
2072         resp = NULL;
2073         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2074
2075         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2076                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2077         os_memcpy(resp->da, addr, ETH_ALEN);
2078         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2079         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2080         resp->u.probe_resp.beacon_int = host_to_le16(100);
2081         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2082         resp->u.probe_resp.capab_info =
2083                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2084                              WLAN_CAPABILITY_PRIVACY |
2085                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2086
2087         wpabuf_put_u8(buf, WLAN_EID_SSID);
2088         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2089         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2090
2091         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2092         wpabuf_put_u8(buf, 8);
2093         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2094         wpabuf_put_u8(buf, 90 / 5);
2095         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2096         wpabuf_put_u8(buf, 180 / 5);
2097         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2098         wpabuf_put_u8(buf, 360 / 5);
2099         wpabuf_put_u8(buf, 480 / 5);
2100         wpabuf_put_u8(buf, 540 / 5);
2101
2102         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2103         wpabuf_put_u8(buf, 1);
2104         wpabuf_put_u8(buf, p2p->cfg->channel);
2105
2106         wpabuf_put_buf(buf, ies);
2107         wpabuf_free(ies);
2108
2109         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2110
2111         wpabuf_free(buf);
2112
2113         return P2P_PREQ_NOT_PROCESSED;
2114 }
2115
2116
2117 enum p2p_probe_req_status
2118 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2119                  const u8 *bssid, const u8 *ie, size_t ie_len)
2120 {
2121         enum p2p_probe_req_status res;
2122
2123         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2124
2125         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2126
2127         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2128             p2p->go_neg_peer &&
2129             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2130             == 0 &&
2131             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2132                 /* Received a Probe Request from GO Negotiation peer */
2133                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2134                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2135                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2136                 return P2P_PREQ_PROCESSED;
2137         }
2138
2139         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2140             p2p->invite_peer &&
2141             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2142             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2143             == 0) {
2144                 /* Received a Probe Request from Invite peer */
2145                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2146                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2147                 return P2P_PREQ_PROCESSED;
2148         }
2149
2150         return res;
2151 }
2152
2153
2154 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2155                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2156 {
2157         struct wpabuf *tmp;
2158         u8 *lpos;
2159         size_t tmplen;
2160         int res;
2161         u8 group_capab;
2162
2163         if (p2p_ie == NULL)
2164                 return 0; /* WLAN AP is not a P2P manager */
2165
2166         /*
2167          * (Re)Association Request - P2P IE
2168          * P2P Capability attribute (shall be present)
2169          * P2P Interface attribute (present if concurrent device and
2170          *      P2P Management is enabled)
2171          */
2172         tmp = wpabuf_alloc(200);
2173         if (tmp == NULL)
2174                 return -1;
2175
2176         lpos = p2p_buf_add_ie_hdr(tmp);
2177         group_capab = 0;
2178         if (p2p->num_groups > 0) {
2179                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2180                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2181                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2182                     p2p->cross_connect)
2183                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2184         }
2185         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2186         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2187             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2188                 p2p_buf_add_p2p_interface(tmp, p2p);
2189         p2p_buf_update_ie_hdr(tmp, lpos);
2190
2191         tmplen = wpabuf_len(tmp);
2192         if (tmplen > len)
2193                 res = -1;
2194         else {
2195                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2196                 res = tmplen;
2197         }
2198         wpabuf_free(tmp);
2199
2200         return res;
2201 }
2202
2203
2204 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2205                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2206 {
2207         struct wpabuf *tmp;
2208         u8 *lpos;
2209         struct p2p_device *peer;
2210         size_t tmplen;
2211         int res;
2212         size_t extra = 0;
2213
2214         if (!p2p_group)
2215                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2216
2217 #ifdef CONFIG_WIFI_DISPLAY
2218         if (p2p->wfd_ie_assoc_req)
2219                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2220 #endif /* CONFIG_WIFI_DISPLAY */
2221
2222         /*
2223          * (Re)Association Request - P2P IE
2224          * P2P Capability attribute (shall be present)
2225          * Extended Listen Timing (may be present)
2226          * P2P Device Info attribute (shall be present)
2227          */
2228         tmp = wpabuf_alloc(200 + extra);
2229         if (tmp == NULL)
2230                 return -1;
2231
2232 #ifdef CONFIG_WIFI_DISPLAY
2233         if (p2p->wfd_ie_assoc_req)
2234                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2235 #endif /* CONFIG_WIFI_DISPLAY */
2236
2237         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2238
2239         lpos = p2p_buf_add_ie_hdr(tmp);
2240         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2241         if (p2p->ext_listen_interval)
2242                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2243                                               p2p->ext_listen_interval);
2244         p2p_buf_add_device_info(tmp, p2p, peer);
2245         p2p_buf_update_ie_hdr(tmp, lpos);
2246
2247         tmplen = wpabuf_len(tmp);
2248         if (tmplen > len)
2249                 res = -1;
2250         else {
2251                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2252                 res = tmplen;
2253         }
2254         wpabuf_free(tmp);
2255
2256         return res;
2257 }
2258
2259
2260 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2261 {
2262         struct wpabuf *p2p_ie;
2263         int ret;
2264
2265         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2266         if (p2p_ie == NULL)
2267                 return 0;
2268
2269         ret = p2p_attr_text(p2p_ie, buf, end);
2270         wpabuf_free(p2p_ie);
2271         return ret;
2272 }
2273
2274
2275 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2276 {
2277         struct p2p_message msg;
2278
2279         os_memset(&msg, 0, sizeof(msg));
2280         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2281                 return -1;
2282
2283         if (msg.p2p_device_addr) {
2284                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2285                 return 0;
2286         } else if (msg.device_id) {
2287                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2288                 return 0;
2289         }
2290         return -1;
2291 }
2292
2293
2294 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2295 {
2296         struct wpabuf *p2p_ie;
2297         int ret;
2298
2299         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2300                                              P2P_IE_VENDOR_TYPE);
2301         if (p2p_ie == NULL)
2302                 return -1;
2303         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2304         wpabuf_free(p2p_ie);
2305         return ret;
2306 }
2307
2308
2309 static void p2p_clear_go_neg(struct p2p_data *p2p)
2310 {
2311         p2p->go_neg_peer = NULL;
2312         p2p_clear_timeout(p2p);
2313         p2p_set_state(p2p, P2P_IDLE);
2314 }
2315
2316
2317 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2318 {
2319         if (p2p->go_neg_peer == NULL) {
2320                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2321                 return; /* No pending Group Formation */
2322         }
2323
2324         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2325             0) {
2326                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2327                         MACSTR " (GO Negotiation peer " MACSTR ")",
2328                         MAC2STR(mac_addr),
2329                         MAC2STR(p2p->go_neg_peer->intended_addr));
2330                 return; /* Ignore unexpected peer address */
2331         }
2332
2333         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2334                 MAC2STR(mac_addr));
2335
2336         p2p_clear_go_neg(p2p);
2337 }
2338
2339
2340 void p2p_group_formation_failed(struct p2p_data *p2p)
2341 {
2342         if (p2p->go_neg_peer == NULL) {
2343                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2344                 return; /* No pending Group Formation */
2345         }
2346
2347         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2348                 MAC2STR(p2p->go_neg_peer->intended_addr));
2349
2350         p2p_clear_go_neg(p2p);
2351 }
2352
2353
2354 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2355 {
2356         struct p2p_data *p2p;
2357
2358         if (cfg->max_peers < 1)
2359                 return NULL;
2360
2361         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2362         if (p2p == NULL)
2363                 return NULL;
2364         p2p->cfg = (struct p2p_config *) (p2p + 1);
2365         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2366         if (cfg->dev_name)
2367                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2368         if (cfg->manufacturer)
2369                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2370         if (cfg->model_name)
2371                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2372         if (cfg->model_number)
2373                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2374         if (cfg->serial_number)
2375                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2376         if (cfg->pref_chan) {
2377                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2378                                                 sizeof(struct p2p_channel));
2379                 if (p2p->cfg->pref_chan) {
2380                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2381                                   cfg->num_pref_chan *
2382                                   sizeof(struct p2p_channel));
2383                 } else
2384                         p2p->cfg->num_pref_chan = 0;
2385         }
2386
2387         p2p->min_disc_int = 1;
2388         p2p->max_disc_int = 3;
2389         p2p->max_disc_tu = -1;
2390
2391         os_get_random(&p2p->next_tie_breaker, 1);
2392         p2p->next_tie_breaker &= 0x01;
2393         if (cfg->sd_request)
2394                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2395         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2396         if (cfg->concurrent_operations)
2397                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2398         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2399
2400         dl_list_init(&p2p->devices);
2401
2402         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2403                                p2p_expiration_timeout, p2p, NULL);
2404
2405         p2p->go_timeout = 100;
2406         p2p->client_timeout = 20;
2407         p2p->num_p2p_sd_queries = 0;
2408
2409         p2p_dbg(p2p, "initialized");
2410         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2411         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2412
2413         return p2p;
2414 }
2415
2416
2417 void p2p_deinit(struct p2p_data *p2p)
2418 {
2419 #ifdef CONFIG_WIFI_DISPLAY
2420         wpabuf_free(p2p->wfd_ie_beacon);
2421         wpabuf_free(p2p->wfd_ie_probe_req);
2422         wpabuf_free(p2p->wfd_ie_probe_resp);
2423         wpabuf_free(p2p->wfd_ie_assoc_req);
2424         wpabuf_free(p2p->wfd_ie_invitation);
2425         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2426         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2427         wpabuf_free(p2p->wfd_ie_go_neg);
2428         wpabuf_free(p2p->wfd_dev_info);
2429         wpabuf_free(p2p->wfd_assoc_bssid);
2430         wpabuf_free(p2p->wfd_coupled_sink_info);
2431 #endif /* CONFIG_WIFI_DISPLAY */
2432
2433         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2434         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2435         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2436         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2437         p2p_flush(p2p);
2438         p2p_free_req_dev_types(p2p);
2439         os_free(p2p->cfg->dev_name);
2440         os_free(p2p->cfg->manufacturer);
2441         os_free(p2p->cfg->model_name);
2442         os_free(p2p->cfg->model_number);
2443         os_free(p2p->cfg->serial_number);
2444         os_free(p2p->cfg->pref_chan);
2445         os_free(p2p->groups);
2446         wpabuf_free(p2p->sd_resp);
2447         os_free(p2p->after_scan_tx);
2448         p2p_remove_wps_vendor_extensions(p2p);
2449         os_free(p2p->no_go_freq.range);
2450         os_free(p2p);
2451 }
2452
2453
2454 void p2p_flush(struct p2p_data *p2p)
2455 {
2456         struct p2p_device *dev, *prev;
2457         p2p_stop_find(p2p);
2458         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2459                               list) {
2460                 dl_list_del(&dev->list);
2461                 p2p_device_free(p2p, dev);
2462         }
2463         p2p_free_sd_queries(p2p);
2464         os_free(p2p->after_scan_tx);
2465         p2p->after_scan_tx = NULL;
2466 }
2467
2468
2469 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2470 {
2471         struct p2p_device *dev;
2472
2473         dev = p2p_get_device(p2p, addr);
2474         if (dev == NULL)
2475                 return -1;
2476
2477         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2478
2479         if (p2p->go_neg_peer == dev)
2480                 p2p->go_neg_peer = NULL;
2481
2482         dev->wps_method = WPS_NOT_READY;
2483         dev->oob_pw_id = 0;
2484         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2485         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2486
2487         /* Check if after_scan_tx is for this peer. If so free it */
2488         if (p2p->after_scan_tx &&
2489             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2490                 os_free(p2p->after_scan_tx);
2491                 p2p->after_scan_tx = NULL;
2492         }
2493
2494         return 0;
2495 }
2496
2497
2498 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2499 {
2500         os_free(p2p->cfg->dev_name);
2501         if (dev_name) {
2502                 p2p->cfg->dev_name = os_strdup(dev_name);
2503                 if (p2p->cfg->dev_name == NULL)
2504                         return -1;
2505         } else
2506                 p2p->cfg->dev_name = NULL;
2507         return 0;
2508 }
2509
2510
2511 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2512 {
2513         os_free(p2p->cfg->manufacturer);
2514         p2p->cfg->manufacturer = NULL;
2515         if (manufacturer) {
2516                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2517                 if (p2p->cfg->manufacturer == NULL)
2518                         return -1;
2519         }
2520
2521         return 0;
2522 }
2523
2524
2525 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2526 {
2527         os_free(p2p->cfg->model_name);
2528         p2p->cfg->model_name = NULL;
2529         if (model_name) {
2530                 p2p->cfg->model_name = os_strdup(model_name);
2531                 if (p2p->cfg->model_name == NULL)
2532                         return -1;
2533         }
2534
2535         return 0;
2536 }
2537
2538
2539 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2540 {
2541         os_free(p2p->cfg->model_number);
2542         p2p->cfg->model_number = NULL;
2543         if (model_number) {
2544                 p2p->cfg->model_number = os_strdup(model_number);
2545                 if (p2p->cfg->model_number == NULL)
2546                         return -1;
2547         }
2548
2549         return 0;
2550 }
2551
2552
2553 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2554 {
2555         os_free(p2p->cfg->serial_number);
2556         p2p->cfg->serial_number = NULL;
2557         if (serial_number) {
2558                 p2p->cfg->serial_number = os_strdup(serial_number);
2559                 if (p2p->cfg->serial_number == NULL)
2560                         return -1;
2561         }
2562
2563         return 0;
2564 }
2565
2566
2567 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2568 {
2569         p2p->cfg->config_methods = config_methods;
2570 }
2571
2572
2573 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2574 {
2575         os_memcpy(p2p->cfg->uuid, uuid, 16);
2576 }
2577
2578
2579 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2580 {
2581         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2582         return 0;
2583 }
2584
2585
2586 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2587                           size_t num_dev_types)
2588 {
2589         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2590                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2591         p2p->cfg->num_sec_dev_types = num_dev_types;
2592         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2593         return 0;
2594 }
2595
2596
2597 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2598 {
2599         int i;
2600
2601         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2602                 wpabuf_free(p2p->wps_vendor_ext[i]);
2603                 p2p->wps_vendor_ext[i] = NULL;
2604         }
2605 }
2606
2607
2608 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2609                                  const struct wpabuf *vendor_ext)
2610 {
2611         int i;
2612
2613         if (vendor_ext == NULL)
2614                 return -1;
2615
2616         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2617                 if (p2p->wps_vendor_ext[i] == NULL)
2618                         break;
2619         }
2620         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2621                 return -1;
2622
2623         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2624         if (p2p->wps_vendor_ext[i] == NULL)
2625                 return -1;
2626
2627         return 0;
2628 }
2629
2630
2631 int p2p_set_country(struct p2p_data *p2p, const char *country)
2632 {
2633         os_memcpy(p2p->cfg->country, country, 3);
2634         return 0;
2635 }
2636
2637
2638 void p2p_continue_find(struct p2p_data *p2p)
2639 {
2640         struct p2p_device *dev;
2641         p2p_set_state(p2p, P2P_SEARCH);
2642         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2643                 if (dev->sd_pending_bcast_queries == 0) {
2644                         /* Initialize with total number of registered broadcast
2645                          * SD queries. */
2646                         dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2647                 }
2648
2649                 if (p2p_start_sd(p2p, dev) == 0)
2650                         return;
2651                 if (dev->req_config_methods &&
2652                     !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2653                         p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2654                                 MACSTR " (config methods 0x%x)",
2655                                 MAC2STR(dev->info.p2p_device_addr),
2656                                 dev->req_config_methods);
2657                         if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2658                                 return;
2659                 }
2660         }
2661
2662         p2p_listen_in_find(p2p, 1);
2663 }
2664
2665
2666 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2667 {
2668         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2669                 success);
2670         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2671
2672         if (!success) {
2673                 p2p->sd_peer = NULL;
2674                 p2p_continue_find(p2p);
2675                 return;
2676         }
2677
2678         if (p2p->sd_peer == NULL) {
2679                 p2p_dbg(p2p, "No SD peer entry known");
2680                 p2p_continue_find(p2p);
2681                 return;
2682         }
2683
2684         /* Wait for response from the peer */
2685         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2686         p2p_set_timeout(p2p, 0, 200000);
2687 }
2688
2689
2690 /**
2691  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2692  * @p2p: P2P module context from p2p_init()
2693  */
2694 static void p2p_retry_pd(struct p2p_data *p2p)
2695 {
2696         struct p2p_device *dev;
2697
2698         if (p2p->state != P2P_IDLE)
2699                 return;
2700
2701         /*
2702          * Retry the prov disc req attempt only for the peer that the user had
2703          * requested.
2704          */
2705
2706         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2707                 if (os_memcmp(p2p->pending_pd_devaddr,
2708                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2709                         continue;
2710                 if (!dev->req_config_methods)
2711                         continue;
2712
2713                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2714                         MACSTR " (config methods 0x%x)",
2715                         MAC2STR(dev->info.p2p_device_addr),
2716                         dev->req_config_methods);
2717                 p2p_send_prov_disc_req(p2p, dev,
2718                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2719                                        p2p->pd_force_freq);
2720                 return;
2721         }
2722 }
2723
2724
2725 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2726 {
2727         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2728                 success);
2729
2730         /*
2731          * Postpone resetting the pending action state till after we actually
2732          * time out. This allows us to take some action like notifying any
2733          * interested parties about no response to the request.
2734          *
2735          * When the timer (below) goes off we check in IDLE, SEARCH, or
2736          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2737          * requests in, if this was still pending and then raise notification.
2738          */
2739
2740         if (!success) {
2741                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2742
2743                 if (p2p->user_initiated_pd &&
2744                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2745                 {
2746                         /* Retry request from timeout to avoid busy loops */
2747                         p2p->pending_action_state = P2P_PENDING_PD;
2748                         p2p_set_timeout(p2p, 0, 50000);
2749                 } else if (p2p->state != P2P_IDLE)
2750                         p2p_continue_find(p2p);
2751                 else if (p2p->user_initiated_pd) {
2752                         p2p->pending_action_state = P2P_PENDING_PD;
2753                         p2p_set_timeout(p2p, 0, 300000);
2754                 }
2755                 return;
2756         }
2757
2758         /*
2759          * This postponing, of resetting pending_action_state, needs to be
2760          * done only for user initiated PD requests and not internal ones.
2761          */
2762         if (p2p->user_initiated_pd)
2763                 p2p->pending_action_state = P2P_PENDING_PD;
2764         else
2765                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2766
2767         /* Wait for response from the peer */
2768         if (p2p->state == P2P_SEARCH)
2769                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2770         p2p_set_timeout(p2p, 0, 200000);
2771 }
2772
2773
2774 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2775                          struct os_reltime *rx_time, int level, const u8 *ies,
2776                          size_t ies_len)
2777 {
2778         if (os_reltime_before(rx_time, &p2p->find_start)) {
2779                 /*
2780                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2781                  * scan results for relatively long time. To avoid reporting
2782                  * stale information, update P2P peers only based on results
2783                  * that have based on frames received after the last p2p_find
2784                  * operation was started.
2785                  */
2786                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2787                         " (rx_time=%u.%06u)",
2788                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2789                         (unsigned int) rx_time->usec);
2790                 return 0;
2791         }
2792
2793         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2794
2795         return 0;
2796 }
2797
2798
2799 void p2p_scan_res_handled(struct p2p_data *p2p)
2800 {
2801         if (!p2p->p2p_scan_running) {
2802                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2803         }
2804         p2p->p2p_scan_running = 0;
2805         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2806
2807         if (p2p_run_after_scan(p2p))
2808                 return;
2809         if (p2p->state == P2P_SEARCH)
2810                 p2p_continue_find(p2p);
2811 }
2812
2813
2814 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2815 {
2816         u8 *len;
2817
2818 #ifdef CONFIG_WIFI_DISPLAY
2819         if (p2p->wfd_ie_probe_req)
2820                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2821 #endif /* CONFIG_WIFI_DISPLAY */
2822
2823         len = p2p_buf_add_ie_hdr(ies);
2824         p2p_buf_add_capability(ies, p2p->dev_capab &
2825                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2826         if (dev_id)
2827                 p2p_buf_add_device_id(ies, dev_id);
2828         if (p2p->cfg->reg_class && p2p->cfg->channel)
2829                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2830                                            p2p->cfg->reg_class,
2831                                            p2p->cfg->channel);
2832         if (p2p->ext_listen_interval)
2833                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2834                                               p2p->ext_listen_interval);
2835         /* TODO: p2p_buf_add_operating_channel() if GO */
2836         p2p_buf_update_ie_hdr(ies, len);
2837 }
2838
2839
2840 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2841 {
2842         size_t len = 100;
2843
2844 #ifdef CONFIG_WIFI_DISPLAY
2845         if (p2p && p2p->wfd_ie_probe_req)
2846                 len += wpabuf_len(p2p->wfd_ie_probe_req);
2847 #endif /* CONFIG_WIFI_DISPLAY */
2848
2849         return len;
2850 }
2851
2852
2853 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
2854 {
2855         return p2p_attr_text(p2p_ie, buf, end);
2856 }
2857
2858
2859 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
2860 {
2861         struct p2p_device *dev = p2p->go_neg_peer;
2862         int timeout;
2863
2864         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
2865
2866         if (dev == NULL) {
2867                 p2p_dbg(p2p, "No pending GO Negotiation");
2868                 return;
2869         }
2870
2871         if (success) {
2872                 if (dev->flags & P2P_DEV_USER_REJECTED) {
2873                         p2p_set_state(p2p, P2P_IDLE);
2874                         return;
2875                 }
2876         } else if (dev->go_neg_req_sent) {
2877                 /* Cancel the increment from p2p_connect_send() on failure */
2878                 dev->go_neg_req_sent--;
2879         }
2880
2881         if (!success &&
2882             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2883             !is_zero_ether_addr(dev->member_in_go_dev)) {
2884                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
2885                         MAC2STR(dev->info.p2p_device_addr));
2886                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2887                 p2p_send_dev_disc_req(p2p, dev);
2888                 return;
2889         }
2890
2891         /*
2892          * Use P2P find, if needed, to find the other device from its listen
2893          * channel.
2894          */
2895         p2p_set_state(p2p, P2P_CONNECT);
2896         timeout = success ? 500000 : 100000;
2897         if (!success && p2p->go_neg_peer &&
2898             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
2899                 unsigned int r;
2900                 /*
2901                  * Peer is expected to wait our response and we will skip the
2902                  * listen phase. Add some randomness to the wait time here to
2903                  * make it less likely to hit cases where we could end up in
2904                  * sync with peer not listening.
2905                  */
2906                 os_get_random((u8 *) &r, sizeof(r));
2907                 timeout += r % 100000;
2908         }
2909         p2p_set_timeout(p2p, 0, timeout);
2910 }
2911
2912
2913 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
2914 {
2915         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
2916                 success);
2917         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
2918                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
2919                 return;
2920         }
2921         p2p_set_state(p2p, P2P_CONNECT);
2922         p2p_set_timeout(p2p, 0, 500000);
2923 }
2924
2925
2926 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
2927                                        const u8 *addr)
2928 {
2929         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
2930         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
2931                 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
2932                                   p2p->go_neg_peer->status);
2933         } else if (success) {
2934                 struct p2p_device *dev;
2935                 dev = p2p_get_device(p2p, addr);
2936                 if (dev &&
2937                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
2938                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
2939         }
2940 }
2941
2942
2943 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
2944                                enum p2p_send_action_result result)
2945 {
2946         struct p2p_device *dev;
2947
2948         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
2949         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2950         if (result == P2P_SEND_ACTION_FAILED) {
2951                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
2952                 return;
2953         }
2954         if (result == P2P_SEND_ACTION_NO_ACK) {
2955                 /*
2956                  * It looks like the TX status for GO Negotiation Confirm is
2957                  * often showing failure even when the peer has actually
2958                  * received the frame. Since the peer may change channels
2959                  * immediately after having received the frame, we may not see
2960                  * an Ack for retries, so just dropping a single frame may
2961                  * trigger this. To allow the group formation to succeed if the
2962                  * peer did indeed receive the frame, continue regardless of
2963                  * the TX status.
2964                  */
2965                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
2966         }
2967
2968         dev = p2p->go_neg_peer;
2969         if (dev == NULL)
2970                 return;
2971
2972         p2p_go_complete(p2p, dev);
2973 }
2974
2975
2976 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
2977                         const u8 *src, const u8 *bssid,
2978                         enum p2p_send_action_result result)
2979 {
2980         enum p2p_pending_action_state state;
2981         int success;
2982
2983         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
2984                 " src=" MACSTR " bssid=" MACSTR " result=%d",
2985                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
2986                 MAC2STR(bssid), result);
2987         success = result == P2P_SEND_ACTION_SUCCESS;
2988         state = p2p->pending_action_state;
2989         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2990         switch (state) {
2991         case P2P_NO_PENDING_ACTION:
2992                 if (p2p->after_scan_tx_in_progress) {
2993                         p2p->after_scan_tx_in_progress = 0;
2994                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
2995                             p2p_run_after_scan(p2p))
2996                                 break;
2997                         if (p2p->state == P2P_SEARCH) {
2998                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
2999                                 p2p_continue_find(p2p);
3000                         }
3001                 }
3002                 break;
3003         case P2P_PENDING_GO_NEG_REQUEST:
3004                 p2p_go_neg_req_cb(p2p, success);
3005                 break;
3006         case P2P_PENDING_GO_NEG_RESPONSE:
3007                 p2p_go_neg_resp_cb(p2p, success);
3008                 break;
3009         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3010                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3011                 break;
3012         case P2P_PENDING_GO_NEG_CONFIRM:
3013                 p2p_go_neg_conf_cb(p2p, result);
3014                 break;
3015         case P2P_PENDING_SD:
3016                 p2p_sd_cb(p2p, success);
3017                 break;
3018         case P2P_PENDING_PD:
3019                 p2p_prov_disc_cb(p2p, success);
3020                 break;
3021         case P2P_PENDING_INVITATION_REQUEST:
3022                 p2p_invitation_req_cb(p2p, success);
3023                 break;
3024         case P2P_PENDING_INVITATION_RESPONSE:
3025                 p2p_invitation_resp_cb(p2p, success);
3026                 break;
3027         case P2P_PENDING_DEV_DISC_REQUEST:
3028                 p2p_dev_disc_req_cb(p2p, success);
3029                 break;
3030         case P2P_PENDING_DEV_DISC_RESPONSE:
3031                 p2p_dev_disc_resp_cb(p2p, success);
3032                 break;
3033         case P2P_PENDING_GO_DISC_REQ:
3034                 p2p_go_disc_req_cb(p2p, success);
3035                 break;
3036         }
3037
3038         p2p->after_scan_tx_in_progress = 0;
3039 }
3040
3041
3042 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3043                    unsigned int duration)
3044 {
3045         if (freq == p2p->pending_client_disc_freq) {
3046                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3047                 p2p->pending_client_disc_freq = 0;
3048                 return;
3049         }
3050
3051         if (freq != p2p->pending_listen_freq) {
3052                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3053                         freq, duration, p2p->pending_listen_freq);
3054                 return;
3055         }
3056
3057         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3058                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3059                 p2p->pending_listen_freq);
3060         p2p->in_listen = 1;
3061         p2p->drv_in_listen = freq;
3062         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3063                 /*
3064                  * Add 20 msec extra wait to avoid race condition with driver
3065                  * remain-on-channel end event, i.e., give driver more time to
3066                  * complete the operation before our timeout expires.
3067                  */
3068                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3069                                 p2p->pending_listen_usec + 20000);
3070         }
3071
3072         p2p->pending_listen_freq = 0;
3073 }
3074
3075
3076 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3077 {
3078         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3079         p2p->drv_in_listen = 0;
3080         if (p2p->in_listen)
3081                 return 0; /* Internal timeout will trigger the next step */
3082
3083         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3084                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3085                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3086                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3087                         return 0;
3088                 }
3089
3090                 p2p_set_state(p2p, P2P_CONNECT);
3091                 p2p_connect_send(p2p, p2p->go_neg_peer);
3092                 return 1;
3093         } else if (p2p->state == P2P_SEARCH) {
3094                 if (p2p->p2p_scan_running) {
3095                          /*
3096                           * Search is already in progress. This can happen if
3097                           * an Action frame RX is reported immediately after
3098                           * the end of a remain-on-channel operation and the
3099                           * response frame to that is sent using an offchannel
3100                           * operation while in p2p_find. Avoid an attempt to
3101                           * restart a scan here.
3102                           */
3103                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3104                         return 1;
3105                 }
3106                 if (p2p->pending_listen_freq) {
3107                         /*
3108                          * Better wait a bit if the driver is unable to start
3109                          * offchannel operation for some reason. p2p_search()
3110                          * will be started from internal timeout.
3111                          */
3112                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3113                         p2p_set_timeout(p2p, 0, 100000);
3114                         return 1;
3115                 }
3116                 if (p2p->search_delay) {
3117                         p2p_dbg(p2p, "Delay search operation by %u ms",
3118                                 p2p->search_delay);
3119                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3120                                         (p2p->search_delay % 1000) * 1000);
3121                         return 1;
3122                 }
3123                 p2p_search(p2p);
3124                 return 1;
3125         }
3126
3127         return 0;
3128 }
3129
3130
3131 static void p2p_timeout_connect(struct p2p_data *p2p)
3132 {
3133         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3134         if (p2p->go_neg_peer &&
3135             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3136                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3137                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3138                 return;
3139         }
3140         if (p2p->go_neg_peer &&
3141             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3142             p2p->go_neg_peer->connect_reqs < 120) {
3143                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3144                 p2p_connect_send(p2p, p2p->go_neg_peer);
3145                 return;
3146         }
3147         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3148                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3149                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3150                 p2p_set_timeout(p2p, 0, 30000);
3151                 return;
3152         }
3153         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3154         p2p_listen_in_find(p2p, 0);
3155 }
3156
3157
3158 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3159 {
3160         if (p2p->go_neg_peer) {
3161                 if (p2p->drv_in_listen) {
3162                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3163                         return;
3164                 }
3165
3166                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3167                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3168                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3169                         return;
3170                 }
3171
3172                 p2p_set_state(p2p, P2P_CONNECT);
3173                 p2p_connect_send(p2p, p2p->go_neg_peer);
3174         } else
3175                 p2p_set_state(p2p, P2P_IDLE);
3176 }
3177
3178
3179 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3180 {
3181         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3182
3183         if (p2p->cfg->is_concurrent_session_active &&
3184             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3185                 p2p_set_timeout(p2p, 0, 500000);
3186         else
3187                 p2p_set_timeout(p2p, 0, 200000);
3188 }
3189
3190
3191 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3192 {
3193         struct p2p_device *dev = p2p->go_neg_peer;
3194
3195         if (dev == NULL) {
3196                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3197                 return;
3198         }
3199
3200         dev->wait_count++;
3201         if (dev->wait_count >= 120) {
3202                 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3203                 p2p_go_neg_failed(p2p, dev, -1);
3204                 return;
3205         }
3206
3207         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3208         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3209         p2p_listen_in_find(p2p, 0);
3210 }
3211
3212
3213 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3214 {
3215         p2p_dbg(p2p, "Service Discovery Query timeout");
3216         if (p2p->sd_peer) {
3217                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3218                 p2p->sd_peer = NULL;
3219         }
3220         p2p_continue_find(p2p);
3221 }
3222
3223
3224 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3225 {
3226         p2p_dbg(p2p, "Provision Discovery Request timeout");
3227         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3228         p2p_continue_find(p2p);
3229 }
3230
3231
3232 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3233 {
3234         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3235
3236         /*
3237          * For user initiated PD requests that we have not gotten any responses
3238          * for while in IDLE state, we retry them a couple of times before
3239          * giving up.
3240          */
3241         if (!p2p->user_initiated_pd)
3242                 return;
3243
3244         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3245
3246         if (p2p->pd_retries) {
3247                 p2p->pd_retries--;
3248                 p2p_retry_pd(p2p);
3249         } else {
3250                 struct p2p_device *dev;
3251                 int for_join = 0;
3252
3253                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3254                         if (os_memcmp(p2p->pending_pd_devaddr,
3255                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3256                                 continue;
3257                         if (dev->req_config_methods &&
3258                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3259                                 for_join = 1;
3260                 }
3261
3262                 if (p2p->cfg->prov_disc_fail)
3263                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3264                                                  p2p->pending_pd_devaddr,
3265                                                  for_join ?
3266                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3267                                                  P2P_PROV_DISC_TIMEOUT);
3268                 p2p_reset_pending_pd(p2p);
3269         }
3270 }
3271
3272
3273 static void p2p_timeout_invite(struct p2p_data *p2p)
3274 {
3275         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3276         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3277         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3278                 /*
3279                  * Better remain on operating channel instead of listen channel
3280                  * when running a group.
3281                  */
3282                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3283                 p2p_set_timeout(p2p, 0, 100000);
3284                 return;
3285         }
3286         p2p_listen_in_find(p2p, 0);
3287 }
3288
3289
3290 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3291 {
3292         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3293                 p2p_set_state(p2p, P2P_INVITE);
3294                 p2p_invite_send(p2p, p2p->invite_peer,
3295                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3296         } else {
3297                 if (p2p->invite_peer) {
3298                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3299                         if (p2p->cfg->invitation_result)
3300                                 p2p->cfg->invitation_result(
3301                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3302                                         p2p->invite_peer->info.p2p_device_addr,
3303                                         0);
3304                 }
3305                 p2p_set_state(p2p, P2P_IDLE);
3306         }
3307 }
3308
3309
3310 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3311 {
3312         struct p2p_data *p2p = eloop_ctx;
3313
3314         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3315
3316         p2p->in_listen = 0;
3317
3318         switch (p2p->state) {
3319         case P2P_IDLE:
3320                 /* Check if we timed out waiting for PD req */
3321                 if (p2p->pending_action_state == P2P_PENDING_PD)
3322                         p2p_timeout_prov_disc_req(p2p);
3323                 break;
3324         case P2P_SEARCH:
3325                 /* Check if we timed out waiting for PD req */
3326                 if (p2p->pending_action_state == P2P_PENDING_PD)
3327                         p2p_timeout_prov_disc_req(p2p);
3328                 if (p2p->search_delay && !p2p->in_search_delay) {
3329                         p2p_dbg(p2p, "Delay search operation by %u ms",
3330                                 p2p->search_delay);
3331                         p2p->in_search_delay = 1;
3332                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3333                                         (p2p->search_delay % 1000) * 1000);
3334                         break;
3335                 }
3336                 p2p->in_search_delay = 0;
3337                 p2p_search(p2p);
3338                 break;
3339         case P2P_CONNECT:
3340                 p2p_timeout_connect(p2p);
3341                 break;
3342         case P2P_CONNECT_LISTEN:
3343                 p2p_timeout_connect_listen(p2p);
3344                 break;
3345         case P2P_GO_NEG:
3346                 break;
3347         case P2P_LISTEN_ONLY:
3348                 /* Check if we timed out waiting for PD req */
3349                 if (p2p->pending_action_state == P2P_PENDING_PD)
3350                         p2p_timeout_prov_disc_req(p2p);
3351
3352                 if (p2p->ext_listen_only) {
3353                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3354                         p2p->ext_listen_only = 0;
3355                         p2p_set_state(p2p, P2P_IDLE);
3356                 }
3357                 break;
3358         case P2P_WAIT_PEER_CONNECT:
3359                 p2p_timeout_wait_peer_connect(p2p);
3360                 break;
3361         case P2P_WAIT_PEER_IDLE:
3362                 p2p_timeout_wait_peer_idle(p2p);
3363                 break;
3364         case P2P_SD_DURING_FIND:
3365                 p2p_timeout_sd_during_find(p2p);
3366                 break;
3367         case P2P_PROVISIONING:
3368                 break;
3369         case P2P_PD_DURING_FIND:
3370                 p2p_timeout_prov_disc_during_find(p2p);
3371                 break;
3372         case P2P_INVITE:
3373                 p2p_timeout_invite(p2p);
3374                 break;
3375         case P2P_INVITE_LISTEN:
3376                 p2p_timeout_invite_listen(p2p);
3377                 break;
3378         }
3379 }
3380
3381
3382 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3383 {
3384         struct p2p_device *dev;
3385
3386         dev = p2p_get_device(p2p, peer_addr);
3387         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3388                 MACSTR, MAC2STR(peer_addr));
3389         if (dev == NULL) {
3390                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3391                 return -1;
3392         }
3393         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3394         dev->flags |= P2P_DEV_USER_REJECTED;
3395         return 0;
3396 }
3397
3398
3399 const char * p2p_wps_method_text(enum p2p_wps_method method)
3400 {
3401         switch (method) {
3402         case WPS_NOT_READY:
3403                 return "not-ready";
3404         case WPS_PIN_DISPLAY:
3405                 return "Display";
3406         case WPS_PIN_KEYPAD:
3407                 return "Keypad";
3408         case WPS_PBC:
3409                 return "PBC";
3410         case WPS_NFC:
3411                 return "NFC";
3412         }
3413
3414         return "??";
3415 }
3416
3417
3418 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3419 {
3420         switch (go_state) {
3421         case UNKNOWN_GO:
3422                 return "unknown";
3423         case LOCAL_GO:
3424                 return "local";
3425         case  REMOTE_GO:
3426                 return "remote";
3427         }
3428
3429         return "??";
3430 }
3431
3432
3433 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3434                                                const u8 *addr, int next)
3435 {
3436         struct p2p_device *dev;
3437
3438         if (addr)
3439                 dev = p2p_get_device(p2p, addr);
3440         else
3441                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3442
3443         if (dev && next) {
3444                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3445                 if (&dev->list == &p2p->devices)
3446                         dev = NULL;
3447         }
3448
3449         if (dev == NULL)
3450                 return NULL;
3451
3452         return &dev->info;
3453 }
3454
3455
3456 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3457                           char *buf, size_t buflen)
3458 {
3459         struct p2p_device *dev;
3460         int res;
3461         char *pos, *end;
3462         struct os_reltime now;
3463
3464         if (info == NULL)
3465                 return -1;
3466
3467         dev = (struct p2p_device *) (((u8 *) info) -
3468                                      offsetof(struct p2p_device, info));
3469
3470         pos = buf;
3471         end = buf + buflen;
3472
3473         os_get_reltime(&now);
3474         res = os_snprintf(pos, end - pos,
3475                           "age=%d\n"
3476                           "listen_freq=%d\n"
3477                           "wps_method=%s\n"
3478                           "interface_addr=" MACSTR "\n"
3479                           "member_in_go_dev=" MACSTR "\n"
3480                           "member_in_go_iface=" MACSTR "\n"
3481                           "go_neg_req_sent=%d\n"
3482                           "go_state=%s\n"
3483                           "dialog_token=%u\n"
3484                           "intended_addr=" MACSTR "\n"
3485                           "country=%c%c\n"
3486                           "oper_freq=%d\n"
3487                           "req_config_methods=0x%x\n"
3488                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3489                           "status=%d\n"
3490                           "wait_count=%u\n"
3491                           "invitation_reqs=%u\n",
3492                           (int) (now.sec - dev->last_seen.sec),
3493                           dev->listen_freq,
3494                           p2p_wps_method_text(dev->wps_method),
3495                           MAC2STR(dev->interface_addr),
3496                           MAC2STR(dev->member_in_go_dev),
3497                           MAC2STR(dev->member_in_go_iface),
3498                           dev->go_neg_req_sent,
3499                           p2p_go_state_text(dev->go_state),
3500                           dev->dialog_token,
3501                           MAC2STR(dev->intended_addr),
3502                           dev->country[0] ? dev->country[0] : '_',
3503                           dev->country[1] ? dev->country[1] : '_',
3504                           dev->oper_freq,
3505                           dev->req_config_methods,
3506                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3507                           "[PROBE_REQ_ONLY]" : "",
3508                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3509                           dev->flags & P2P_DEV_NOT_YET_READY ?
3510                           "[NOT_YET_READY]" : "",
3511                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3512                           "[PD_PEER_DISPLAY]" : "",
3513                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3514                           "[PD_PEER_KEYPAD]" : "",
3515                           dev->flags & P2P_DEV_USER_REJECTED ?
3516                           "[USER_REJECTED]" : "",
3517                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3518                           "[PEER_WAITING_RESPONSE]" : "",
3519                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3520                           "[PREFER_PERSISTENT_GROUP]" : "",
3521                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3522                           "[WAIT_GO_NEG_RESPONSE]" : "",
3523                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3524                           "[WAIT_GO_NEG_CONFIRM]" : "",
3525                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3526                           "[GROUP_CLIENT_ONLY]" : "",
3527                           dev->flags & P2P_DEV_FORCE_FREQ ?
3528                           "[FORCE_FREQ]" : "",
3529                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3530                           "[PD_FOR_JOIN]" : "",
3531                           dev->status,
3532                           dev->wait_count,
3533                           dev->invitation_reqs);
3534         if (res < 0 || res >= end - pos)
3535                 return pos - buf;
3536         pos += res;
3537
3538         if (dev->ext_listen_period) {
3539                 res = os_snprintf(pos, end - pos,
3540                                   "ext_listen_period=%u\n"
3541                                   "ext_listen_interval=%u\n",
3542                                   dev->ext_listen_period,
3543                                   dev->ext_listen_interval);
3544                 if (res < 0 || res >= end - pos)
3545                         return pos - buf;
3546                 pos += res;
3547         }
3548
3549         if (dev->oper_ssid_len) {
3550                 res = os_snprintf(pos, end - pos,
3551                                   "oper_ssid=%s\n",
3552                                   wpa_ssid_txt(dev->oper_ssid,
3553                                                dev->oper_ssid_len));
3554                 if (res < 0 || res >= end - pos)
3555                         return pos - buf;
3556                 pos += res;
3557         }
3558
3559 #ifdef CONFIG_WIFI_DISPLAY
3560         if (dev->info.wfd_subelems) {
3561                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3562                 if (res < 0 || res >= end - pos)
3563                         return pos - buf;
3564                 pos += res;
3565
3566                 pos += wpa_snprintf_hex(pos, end - pos,
3567                                         wpabuf_head(dev->info.wfd_subelems),
3568                                         wpabuf_len(dev->info.wfd_subelems));
3569
3570                 res = os_snprintf(pos, end - pos, "\n");
3571                 if (res < 0 || res >= end - pos)
3572                         return pos - buf;
3573                 pos += res;
3574         }
3575 #endif /* CONFIG_WIFI_DISPLAY */
3576
3577         return pos - buf;
3578 }
3579
3580
3581 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3582 {
3583         return p2p_get_device(p2p, addr) != NULL;
3584 }
3585
3586
3587 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3588 {
3589         if (enabled) {
3590                 p2p_dbg(p2p, "Client discoverability enabled");
3591                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3592         } else {
3593                 p2p_dbg(p2p, "Client discoverability disabled");
3594                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3595         }
3596 }
3597
3598
3599 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3600                                               u32 duration2, u32 interval2)
3601 {
3602         struct wpabuf *req;
3603         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3604         u8 *len;
3605
3606         req = wpabuf_alloc(100);
3607         if (req == NULL)
3608                 return NULL;
3609
3610         if (duration1 || interval1) {
3611                 os_memset(&desc1, 0, sizeof(desc1));
3612                 desc1.count_type = 1;
3613                 desc1.duration = duration1;
3614                 desc1.interval = interval1;
3615                 ptr1 = &desc1;
3616
3617                 if (duration2 || interval2) {
3618                         os_memset(&desc2, 0, sizeof(desc2));
3619                         desc2.count_type = 2;
3620                         desc2.duration = duration2;
3621                         desc2.interval = interval2;
3622                         ptr2 = &desc2;
3623                 }
3624         }
3625
3626         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3627         len = p2p_buf_add_ie_hdr(req);
3628         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3629         p2p_buf_update_ie_hdr(req, len);
3630
3631         return req;
3632 }
3633
3634
3635 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3636                      const u8 *own_interface_addr, unsigned int freq,
3637                      u32 duration1, u32 interval1, u32 duration2,
3638                      u32 interval2)
3639 {
3640         struct wpabuf *req;
3641
3642         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3643                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3644                 "dur2=%u int2=%u",
3645                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3646                 freq, duration1, interval1, duration2, interval2);
3647
3648         req = p2p_build_presence_req(duration1, interval1, duration2,
3649                                      interval2);
3650         if (req == NULL)
3651                 return -1;
3652
3653         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3654         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3655                             go_interface_addr,
3656                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3657                 p2p_dbg(p2p, "Failed to send Action frame");
3658         }
3659         wpabuf_free(req);
3660
3661         return 0;
3662 }
3663
3664
3665 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3666                                                size_t noa_len, u8 dialog_token)
3667 {
3668         struct wpabuf *resp;
3669         u8 *len;
3670
3671         resp = wpabuf_alloc(100 + noa_len);
3672         if (resp == NULL)
3673                 return NULL;
3674
3675         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3676         len = p2p_buf_add_ie_hdr(resp);
3677         p2p_buf_add_status(resp, status);
3678         if (noa) {
3679                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3680                 wpabuf_put_le16(resp, noa_len);
3681                 wpabuf_put_data(resp, noa, noa_len);
3682         } else
3683                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3684         p2p_buf_update_ie_hdr(resp, len);
3685
3686         return resp;
3687 }
3688
3689
3690 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3691                                      const u8 *sa, const u8 *data, size_t len,
3692                                      int rx_freq)
3693 {
3694         struct p2p_message msg;
3695         u8 status;
3696         struct wpabuf *resp;
3697         size_t g;
3698         struct p2p_group *group = NULL;
3699         int parsed = 0;
3700         u8 noa[50];
3701         int noa_len;
3702
3703         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3704
3705         for (g = 0; g < p2p->num_groups; g++) {
3706                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3707                               ETH_ALEN) == 0) {
3708                         group = p2p->groups[g];
3709                         break;
3710                 }
3711         }
3712         if (group == NULL) {
3713                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3714                         MACSTR, MAC2STR(da));
3715                 return;
3716         }
3717
3718         if (p2p_parse(data, len, &msg) < 0) {
3719                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3720                 status = P2P_SC_FAIL_INVALID_PARAMS;
3721                 goto fail;
3722         }
3723         parsed = 1;
3724
3725         if (msg.noa == NULL) {
3726                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3727                 status = P2P_SC_FAIL_INVALID_PARAMS;
3728                 goto fail;
3729         }
3730
3731         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3732
3733 fail:
3734         if (p2p->cfg->get_noa)
3735                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3736                                             sizeof(noa));
3737         else
3738                 noa_len = -1;
3739         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3740                                        noa_len > 0 ? noa_len : 0,
3741                                        msg.dialog_token);
3742         if (parsed)
3743                 p2p_parse_free(&msg);
3744         if (resp == NULL)
3745                 return;
3746
3747         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3748         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3749                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3750                 p2p_dbg(p2p, "Failed to send Action frame");
3751         }
3752         wpabuf_free(resp);
3753 }
3754
3755
3756 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3757                                       const u8 *sa, const u8 *data, size_t len)
3758 {
3759         struct p2p_message msg;
3760
3761         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3762
3763         if (p2p_parse(data, len, &msg) < 0) {
3764                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3765                 return;
3766         }
3767
3768         if (msg.status == NULL || msg.noa == NULL) {
3769                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3770                 p2p_parse_free(&msg);
3771                 return;
3772         }
3773
3774         if (p2p->cfg->presence_resp) {
3775                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3776                                         msg.noa, msg.noa_len);
3777         }
3778
3779         if (*msg.status) {
3780                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3781                         *msg.status);
3782                 p2p_parse_free(&msg);
3783                 return;
3784         }
3785
3786         p2p_dbg(p2p, "P2P Presence Request was accepted");
3787         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3788                     msg.noa, msg.noa_len);
3789         /* TODO: process NoA */
3790         p2p_parse_free(&msg);
3791 }
3792
3793
3794 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3795 {
3796         struct p2p_data *p2p = eloop_ctx;
3797
3798         if (p2p->ext_listen_interval) {
3799                 /* Schedule next extended listen timeout */
3800                 eloop_register_timeout(p2p->ext_listen_interval_sec,
3801                                        p2p->ext_listen_interval_usec,
3802                                        p2p_ext_listen_timeout, p2p, NULL);
3803         }
3804
3805         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
3806                 /*
3807                  * This should not really happen, but it looks like the Listen
3808                  * command may fail is something else (e.g., a scan) was
3809                  * running at an inconvenient time. As a workaround, allow new
3810                  * Extended Listen operation to be started.
3811                  */
3812                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
3813                 p2p->ext_listen_only = 0;
3814                 p2p_set_state(p2p, P2P_IDLE);
3815         }
3816
3817         if (p2p->state != P2P_IDLE) {
3818                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
3819                 return;
3820         }
3821
3822         p2p_dbg(p2p, "Extended Listen timeout");
3823         p2p->ext_listen_only = 1;
3824         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
3825                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
3826                 p2p->ext_listen_only = 0;
3827         }
3828 }
3829
3830
3831 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
3832                    unsigned int interval)
3833 {
3834         if (period > 65535 || interval > 65535 || period > interval ||
3835             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
3836                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
3837                         period, interval);
3838                 return -1;
3839         }
3840
3841         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
3842
3843         if (interval == 0) {
3844                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
3845                 p2p->ext_listen_period = 0;
3846                 p2p->ext_listen_interval = 0;
3847                 return 0;
3848         }
3849
3850         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
3851                 period, interval);
3852         p2p->ext_listen_period = period;
3853         p2p->ext_listen_interval = interval;
3854         p2p->ext_listen_interval_sec = interval / 1000;
3855         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
3856
3857         eloop_register_timeout(p2p->ext_listen_interval_sec,
3858                                p2p->ext_listen_interval_usec,
3859                                p2p_ext_listen_timeout, p2p, NULL);
3860
3861         return 0;
3862 }
3863
3864
3865 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3866                       const u8 *ie, size_t ie_len)
3867 {
3868         struct p2p_message msg;
3869
3870         if (bssid == NULL || ie == NULL)
3871                 return;
3872
3873         os_memset(&msg, 0, sizeof(msg));
3874         if (p2p_parse_ies(ie, ie_len, &msg))
3875                 return;
3876         if (msg.minor_reason_code == NULL) {
3877                 p2p_parse_free(&msg);
3878                 return;
3879         }
3880
3881         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
3882                 " reason_code=%u minor_reason_code=%u",
3883                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3884
3885         p2p_parse_free(&msg);
3886 }
3887
3888
3889 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3890                         const u8 *ie, size_t ie_len)
3891 {
3892         struct p2p_message msg;
3893
3894         if (bssid == NULL || ie == NULL)
3895                 return;
3896
3897         os_memset(&msg, 0, sizeof(msg));
3898         if (p2p_parse_ies(ie, ie_len, &msg))
3899                 return;
3900         if (msg.minor_reason_code == NULL) {
3901                 p2p_parse_free(&msg);
3902                 return;
3903         }
3904
3905         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
3906                 " reason_code=%u minor_reason_code=%u",
3907                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3908
3909         p2p_parse_free(&msg);
3910 }
3911
3912
3913 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
3914 {
3915         if (enabled) {
3916                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
3917                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
3918         } else {
3919                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
3920                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
3921         }
3922 }
3923
3924
3925 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
3926 {
3927         if (p2p_channel_to_freq(reg_class, channel) < 0)
3928                 return -1;
3929
3930         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
3931                 reg_class, channel);
3932         p2p->cfg->reg_class = reg_class;
3933         p2p->cfg->channel = channel;
3934
3935         return 0;
3936 }
3937
3938
3939 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
3940 {
3941         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
3942         if (postfix == NULL) {
3943                 p2p->cfg->ssid_postfix_len = 0;
3944                 return 0;
3945         }
3946         if (len > sizeof(p2p->cfg->ssid_postfix))
3947                 return -1;
3948         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
3949         p2p->cfg->ssid_postfix_len = len;
3950         return 0;
3951 }
3952
3953
3954 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
3955                          int cfg_op_channel)
3956 {
3957         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
3958                 return -1;
3959
3960         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
3961                 op_reg_class, op_channel);
3962         p2p->cfg->op_reg_class = op_reg_class;
3963         p2p->cfg->op_channel = op_channel;
3964         p2p->cfg->cfg_op_channel = cfg_op_channel;
3965         return 0;
3966 }
3967
3968
3969 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
3970                       const struct p2p_channel *pref_chan)
3971 {
3972         struct p2p_channel *n;
3973
3974         if (pref_chan) {
3975                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
3976                 if (n == NULL)
3977                         return -1;
3978                 os_memcpy(n, pref_chan,
3979                           num_pref_chan * sizeof(struct p2p_channel));
3980         } else
3981                 n = NULL;
3982
3983         os_free(p2p->cfg->pref_chan);
3984         p2p->cfg->pref_chan = n;
3985         p2p->cfg->num_pref_chan = num_pref_chan;
3986
3987         return 0;
3988 }
3989
3990
3991 int p2p_set_no_go_freq(struct p2p_data *p2p,
3992                        const struct wpa_freq_range_list *list)
3993 {
3994         struct wpa_freq_range *tmp;
3995
3996         if (list == NULL || list->num == 0) {
3997                 os_free(p2p->no_go_freq.range);
3998                 p2p->no_go_freq.range = NULL;
3999                 p2p->no_go_freq.num = 0;
4000                 return 0;
4001         }
4002
4003         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4004         if (tmp == NULL)
4005                 return -1;
4006         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4007         os_free(p2p->no_go_freq.range);
4008         p2p->no_go_freq.range = tmp;
4009         p2p->no_go_freq.num = list->num;
4010         p2p_dbg(p2p, "Updated no GO chan list");
4011
4012         return 0;
4013 }
4014
4015
4016 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4017                            u8 *iface_addr)
4018 {
4019         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4020         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4021                 return -1;
4022         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4023         return 0;
4024 }
4025
4026
4027 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4028                            u8 *dev_addr)
4029 {
4030         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4031         if (dev == NULL)
4032                 return -1;
4033         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4034         return 0;
4035 }
4036
4037
4038 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4039 {
4040         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4041         if (is_zero_ether_addr(p2p->peer_filter))
4042                 p2p_dbg(p2p, "Disable peer filter");
4043         else
4044                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4045                         MAC2STR(p2p->peer_filter));
4046 }
4047
4048
4049 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4050 {
4051         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4052         if (p2p->cross_connect == enabled)
4053                 return;
4054         p2p->cross_connect = enabled;
4055         /* TODO: may need to tear down any action group where we are GO(?) */
4056 }
4057
4058
4059 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4060 {
4061         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4062         if (dev == NULL)
4063                 return -1;
4064         if (dev->oper_freq <= 0)
4065                 return -1;
4066         return dev->oper_freq;
4067 }
4068
4069
4070 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4071 {
4072         p2p_dbg(p2p, "Intra BSS distribution %s",
4073                 enabled ? "enabled" : "disabled");
4074         p2p->cfg->p2p_intra_bss = enabled;
4075 }
4076
4077
4078 void p2p_update_channel_list(struct p2p_data *p2p,
4079                              const struct p2p_channels *chan,
4080                              const struct p2p_channels *cli_chan)
4081 {
4082         p2p_dbg(p2p, "Update channel list");
4083         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4084         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4085         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4086                   sizeof(struct p2p_channels));
4087         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4088 }
4089
4090
4091 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4092                     const u8 *src, const u8 *bssid, const u8 *buf,
4093                     size_t len, unsigned int wait_time)
4094 {
4095         if (p2p->p2p_scan_running) {
4096                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4097                 if (p2p->after_scan_tx) {
4098                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4099                         os_free(p2p->after_scan_tx);
4100                 }
4101                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4102                                                len);
4103                 if (p2p->after_scan_tx == NULL)
4104                         return -1;
4105                 p2p->after_scan_tx->freq = freq;
4106                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4107                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4108                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4109                 p2p->after_scan_tx->len = len;
4110                 p2p->after_scan_tx->wait_time = wait_time;
4111                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4112                 return 0;
4113         }
4114
4115         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4116                                      buf, len, wait_time);
4117 }
4118
4119
4120 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4121                            int freq_overall)
4122 {
4123         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4124                 freq_24, freq_5, freq_overall);
4125         p2p->best_freq_24 = freq_24;
4126         p2p->best_freq_5 = freq_5;
4127         p2p->best_freq_overall = freq_overall;
4128 }
4129
4130
4131 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4132 {
4133         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4134         p2p->own_freq_preference = freq;
4135 }
4136
4137
4138 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4139 {
4140         if (p2p == NULL || p2p->go_neg_peer == NULL)
4141                 return NULL;
4142         return p2p->go_neg_peer->info.p2p_device_addr;
4143 }
4144
4145
4146 const struct p2p_peer_info *
4147 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4148 {
4149         struct p2p_device *dev;
4150
4151         if (addr) {
4152                 dev = p2p_get_device(p2p, addr);
4153                 if (!dev)
4154                         return NULL;
4155
4156                 if (!next) {
4157                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4158                                 return NULL;
4159
4160                         return &dev->info;
4161                 } else {
4162                         do {
4163                                 dev = dl_list_first(&dev->list,
4164                                                     struct p2p_device,
4165                                                     list);
4166                                 if (&dev->list == &p2p->devices)
4167                                         return NULL;
4168                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4169                 }
4170         } else {
4171                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4172                 if (!dev)
4173                         return NULL;
4174                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4175                         dev = dl_list_first(&dev->list,
4176                                             struct p2p_device,
4177                                             list);
4178                         if (&dev->list == &p2p->devices)
4179                                 return NULL;
4180                 }
4181         }
4182
4183         return &dev->info;
4184 }
4185
4186
4187 int p2p_in_progress(struct p2p_data *p2p)
4188 {
4189         if (p2p == NULL)
4190                 return 0;
4191         if (p2p->state == P2P_SEARCH)
4192                 return 2;
4193         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4194 }
4195
4196
4197 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4198                             u8 client_timeout)
4199 {
4200         if (p2p) {
4201                 p2p->go_timeout = go_timeout;
4202                 p2p->client_timeout = client_timeout;
4203         }
4204 }
4205
4206
4207 #ifdef CONFIG_WIFI_DISPLAY
4208
4209 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4210 {
4211         size_t g;
4212         struct p2p_group *group;
4213
4214         for (g = 0; g < p2p->num_groups; g++) {
4215                 group = p2p->groups[g];
4216                 p2p_group_force_beacon_update_ies(group);
4217         }
4218 }
4219
4220
4221 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4222 {
4223         wpabuf_free(p2p->wfd_ie_beacon);
4224         p2p->wfd_ie_beacon = ie;
4225         p2p_update_wfd_ie_groups(p2p);
4226         return 0;
4227 }
4228
4229
4230 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4231 {
4232         wpabuf_free(p2p->wfd_ie_probe_req);
4233         p2p->wfd_ie_probe_req = ie;
4234         return 0;
4235 }
4236
4237
4238 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4239 {
4240         wpabuf_free(p2p->wfd_ie_probe_resp);
4241         p2p->wfd_ie_probe_resp = ie;
4242         p2p_update_wfd_ie_groups(p2p);
4243         return 0;
4244 }
4245
4246
4247 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4248 {
4249         wpabuf_free(p2p->wfd_ie_assoc_req);
4250         p2p->wfd_ie_assoc_req = ie;
4251         return 0;
4252 }
4253
4254
4255 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4256 {
4257         wpabuf_free(p2p->wfd_ie_invitation);
4258         p2p->wfd_ie_invitation = ie;
4259         return 0;
4260 }
4261
4262
4263 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4264 {
4265         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4266         p2p->wfd_ie_prov_disc_req = ie;
4267         return 0;
4268 }
4269
4270
4271 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4272 {
4273         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4274         p2p->wfd_ie_prov_disc_resp = ie;
4275         return 0;
4276 }
4277
4278
4279 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4280 {
4281         wpabuf_free(p2p->wfd_ie_go_neg);
4282         p2p->wfd_ie_go_neg = ie;
4283         return 0;
4284 }
4285
4286
4287 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4288 {
4289         wpabuf_free(p2p->wfd_dev_info);
4290         if (elem) {
4291                 p2p->wfd_dev_info = wpabuf_dup(elem);
4292                 if (p2p->wfd_dev_info == NULL)
4293                         return -1;
4294         } else
4295                 p2p->wfd_dev_info = NULL;
4296
4297         return 0;
4298 }
4299
4300
4301 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4302 {
4303         wpabuf_free(p2p->wfd_assoc_bssid);
4304         if (elem) {
4305                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4306                 if (p2p->wfd_assoc_bssid == NULL)
4307                         return -1;
4308         } else
4309                 p2p->wfd_assoc_bssid = NULL;
4310
4311         return 0;
4312 }
4313
4314
4315 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4316                                   const struct wpabuf *elem)
4317 {
4318         wpabuf_free(p2p->wfd_coupled_sink_info);
4319         if (elem) {
4320                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4321                 if (p2p->wfd_coupled_sink_info == NULL)
4322                         return -1;
4323         } else
4324                 p2p->wfd_coupled_sink_info = NULL;
4325
4326         return 0;
4327 }
4328
4329 #endif /* CONFIG_WIFI_DISPLAY */
4330
4331
4332 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4333                      int max_disc_tu)
4334 {
4335         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4336                 return -1;
4337
4338         p2p->min_disc_int = min_disc_int;
4339         p2p->max_disc_int = max_disc_int;
4340         p2p->max_disc_tu = max_disc_tu;
4341         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4342                 min_disc_int, max_disc_int, max_disc_tu);
4343
4344         return 0;
4345 }
4346
4347
4348 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4349 {
4350         va_list ap;
4351         char buf[500];
4352
4353         if (!p2p->cfg->debug_print)
4354                 return;
4355
4356         va_start(ap, fmt);
4357         vsnprintf(buf, sizeof(buf), fmt, ap);
4358         buf[sizeof(buf) - 1] = '\0';
4359         va_end(ap);
4360         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4361 }
4362
4363
4364 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4365 {
4366         va_list ap;
4367         char buf[500];
4368
4369         if (!p2p->cfg->debug_print)
4370                 return;
4371
4372         va_start(ap, fmt);
4373         vsnprintf(buf, sizeof(buf), fmt, ap);
4374         buf[sizeof(buf) - 1] = '\0';
4375         va_end(ap);
4376         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4377 }
4378
4379
4380 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4381 {
4382         va_list ap;
4383         char buf[500];
4384
4385         if (!p2p->cfg->debug_print)
4386                 return;
4387
4388         va_start(ap, fmt);
4389         vsnprintf(buf, sizeof(buf), fmt, ap);
4390         buf[sizeof(buf) - 1] = '\0';
4391         va_end(ap);
4392         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4393 }
4394
4395
4396 #ifdef CONFIG_WPS_NFC
4397
4398 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4399                                               int client_freq,
4400                                               const u8 *go_dev_addr,
4401                                               const u8 *ssid, size_t ssid_len)
4402 {
4403         struct wpabuf *buf;
4404         u8 op_class, channel;
4405         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4406
4407         buf = wpabuf_alloc(1000);
4408         if (buf == NULL)
4409                 return NULL;
4410
4411         op_class = p2p->cfg->reg_class;
4412         channel = p2p->cfg->channel;
4413
4414         p2p_buf_add_capability(buf, p2p->dev_capab &
4415                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4416         p2p_buf_add_device_info(buf, p2p, NULL);
4417
4418         if (p2p->num_groups > 0) {
4419                 role = P2P_GO_IN_A_GROUP;
4420                 p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]),
4421                                     &op_class, &channel);
4422         } else if (client_freq > 0) {
4423                 role = P2P_CLIENT_IN_A_GROUP;
4424                 p2p_freq_to_channel(client_freq, &op_class, &channel);
4425         }
4426
4427         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4428                                        channel, role);
4429
4430         if (p2p->num_groups > 0) {
4431                 /* Limit number of clients to avoid very long message */
4432                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4433                 p2p_group_buf_add_id(p2p->groups[0], buf);
4434         } else if (client_freq > 0 &&
4435                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4436                    ssid && ssid_len > 0) {
4437                 /*
4438                  * Add the optional P2P Group ID to indicate in which group this
4439                  * device is a P2P Client.
4440                  */
4441                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4442         }
4443
4444         return buf;
4445 }
4446
4447
4448 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4449                                            int client_freq,
4450                                            const u8 *go_dev_addr,
4451                                            const u8 *ssid, size_t ssid_len)
4452 {
4453         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4454                                       ssid_len);
4455 }
4456
4457
4458 struct wpabuf * p2p_build_nfc_handover_sel(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 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4469                                         struct p2p_nfc_params *params)
4470 {
4471         struct p2p_message msg;
4472         struct p2p_device *dev;
4473         const u8 *p2p_dev_addr;
4474         int freq;
4475         enum p2p_role_indication role;
4476
4477         params->next_step = NO_ACTION;
4478
4479         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4480                                    params->p2p_attr, params->p2p_len, &msg)) {
4481                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4482                 p2p_parse_free(&msg);
4483                 return -1;
4484         }
4485
4486         if (msg.p2p_device_addr)
4487                 p2p_dev_addr = msg.p2p_device_addr;
4488         else if (msg.device_id)
4489                 p2p_dev_addr = msg.device_id;
4490         else {
4491                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4492                 p2p_parse_free(&msg);
4493                 return -1;
4494         }
4495
4496         if (msg.oob_dev_password) {
4497                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4498                           msg.oob_dev_password_len);
4499                 params->oob_dev_pw_len = msg.oob_dev_password_len;
4500         }
4501
4502         dev = p2p_create_device(p2p, p2p_dev_addr);
4503         if (dev == NULL) {
4504                 p2p_parse_free(&msg);
4505                 return -1;
4506         }
4507
4508         params->peer = &dev->info;
4509
4510         os_get_reltime(&dev->last_seen);
4511         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4512         p2p_copy_wps_info(p2p, dev, 0, &msg);
4513
4514         if (!msg.oob_go_neg_channel) {
4515                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4516                 return -1;
4517         }
4518
4519         if (msg.oob_go_neg_channel[3] == 0 &&
4520             msg.oob_go_neg_channel[4] == 0)
4521                 freq = 0;
4522         else
4523                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4524                                            msg.oob_go_neg_channel[4]);
4525         if (freq < 0) {
4526                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4527                 return -1;
4528         }
4529         role = msg.oob_go_neg_channel[5];
4530
4531         if (role == P2P_GO_IN_A_GROUP) {
4532                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4533                 params->go_freq = freq;
4534         } else if (role == P2P_CLIENT_IN_A_GROUP) {
4535                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4536                         freq);
4537                 params->go_freq = freq;
4538         } else
4539                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4540         dev->oob_go_neg_freq = freq;
4541
4542         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4543                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4544                                            p2p->cfg->channel);
4545                 if (freq < 0) {
4546                         p2p_dbg(p2p, "Own listen channel not known");
4547                         return -1;
4548                 }
4549                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4550                 dev->oob_go_neg_freq = freq;
4551         }
4552
4553         if (msg.group_id) {
4554                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4555                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4556                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4557                           params->go_ssid_len);
4558         }
4559
4560         p2p_parse_free(&msg);
4561
4562         if (dev->flags & P2P_DEV_USER_REJECTED) {
4563                 p2p_dbg(p2p, "Do not report rejected device");
4564                 return 0;
4565         }
4566
4567         if (!(dev->flags & P2P_DEV_REPORTED)) {
4568                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4569                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
4570                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4571         }
4572
4573         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4574                 params->next_step = BOTH_GO;
4575         else if (role == P2P_GO_IN_A_GROUP)
4576                 params->next_step = JOIN_GROUP;
4577         else if (role == P2P_CLIENT_IN_A_GROUP) {
4578                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4579                 params->next_step = PEER_CLIENT;
4580         } else if (p2p->num_groups > 0)
4581                 params->next_step = AUTH_JOIN;
4582         else if (params->sel)
4583                 params->next_step = INIT_GO_NEG;
4584         else
4585                 params->next_step = RESP_GO_NEG;
4586
4587         return 0;
4588 }
4589
4590
4591 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4592                                       int go_intent,
4593                                       const u8 *own_interface_addr)
4594 {
4595
4596         p2p->authorized_oob_dev_pw_id = dev_pw_id;
4597         if (dev_pw_id == 0) {
4598                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4599                 return;
4600         }
4601
4602         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4603                 dev_pw_id);
4604
4605         p2p->go_intent = go_intent;
4606         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4607 }
4608
4609 #endif /* CONFIG_WPS_NFC */