src/p2p/p2p.c

   1 /*
   2  * Wi-Fi Direct - P2P module
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "common/ieee802_11_common.h"
  21 #include "wps/wps_i.h"
  22 #include "p2p_i.h"
  23 #include "p2p.h"
  24
  25
  26 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  27 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  28 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  29                                      const u8 *sa, const u8 *data, size_t len,
  30                                      int rx_freq);
  31 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  32                                       const u8 *sa, const u8 *data,
  33                                       size_t len);
  34 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  35 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  36
  37
  38 /*
  39  * p2p_scan recovery timeout
  40  *
  41  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  42  * timeout for this to avoid hitting P2P timeout unnecessarily.
  43  */
  44 #define P2P_SCAN_TIMEOUT 35
  45
  46 /**
  47  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  48  * entries will be removed
  49  */
  50 #define P2P_PEER_EXPIRATION_AGE 300
  51
  52 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  53
  54 static void p2p_expire_peers(struct p2p_data *p2p)
  55 {
  56         struct p2p_device *dev, *n;
  57         struct os_time now;
  58
  59         os_get_time(&now);
  60         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  61                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  62                         continue;
  63                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Expiring old peer "
  64                         "entry " MACSTR, MAC2STR(dev->p2p_device_addr));
  65                 dl_list_del(&dev->list);
  66                 p2p_device_free(p2p, dev);
  67         }
  68 }
  69
  70
  71 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
  72 {
  73         struct p2p_data *p2p = eloop_ctx;
  74         p2p_expire_peers(p2p);
  75         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
  76                                p2p_expiration_timeout, p2p, NULL);
  77 }
  78
  79
  80 static const char * p2p_state_txt(int state)
  81 {
  82         switch (state) {
  83         case P2P_IDLE:
  84                 return "IDLE";
  85         case P2P_SEARCH:
  86                 return "SEARCH";
  87         case P2P_CONNECT:
  88                 return "CONNECT";
  89         case P2P_CONNECT_LISTEN:
  90                 return "CONNECT_LISTEN";
  91         case P2P_GO_NEG:
  92                 return "GO_NEG";
  93         case P2P_LISTEN_ONLY:
  94                 return "LISTEN_ONLY";
  95         case P2P_WAIT_PEER_CONNECT:
  96                 return "WAIT_PEER_CONNECT";
  97         case P2P_WAIT_PEER_IDLE:
  98                 return "WAIT_PEER_IDLE";
  99         case P2P_SD_DURING_FIND:
 100                 return "SD_DURING_FIND";
 101         case P2P_PROVISIONING:
 102                 return "PROVISIONING";
 103         case P2P_PD_DURING_FIND:
 104                 return "PD_DURING_FIND";
 105         case P2P_INVITE:
 106                 return "INVITE";
 107         case P2P_INVITE_LISTEN:
 108                 return "INVITE_LISTEN";
 109         default:
 110                 return "?";
 111         }
 112 }
 113
 114
 115 void p2p_set_state(struct p2p_data *p2p, int new_state)
 116 {
 117         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: State %s -> %s",
 118                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 119         p2p->state = new_state;
 120 }
 121
 122
 123 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 124 {
 125         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 126                 "P2P: Set timeout (state=%s): %u.%06u sec",
 127                 p2p_state_txt(p2p->state), sec, usec);
 128         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 129         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 130 }
 131
 132
 133 void p2p_clear_timeout(struct p2p_data *p2p)
 134 {
 135         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear timeout (state=%s)",
 136                 p2p_state_txt(p2p->state));
 137         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 138 }
 139
 140
 141 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
 142                        int status)
 143 {
 144         struct p2p_go_neg_results res;
 145         p2p_clear_timeout(p2p);
 146         p2p_set_state(p2p, P2P_IDLE);
 147         p2p->go_neg_peer = NULL;
 148
 149         os_memset(&res, 0, sizeof(res));
 150         res.status = status;
 151         if (peer) {
 152                 os_memcpy(res.peer_device_addr, peer->p2p_device_addr,
 153                           ETH_ALEN);
 154                 os_memcpy(res.peer_interface_addr, peer->intended_addr,
 155                           ETH_ALEN);
 156         }
 157         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 158 }
 159
 160
 161 static void p2p_listen_in_find(struct p2p_data *p2p)
 162 {
 163         unsigned int r, tu;
 164         int freq;
 165         struct wpabuf *ies;
 166
 167         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 168                 "P2P: Starting short listen state (state=%s)",
 169                 p2p_state_txt(p2p->state));
 170
 171         freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class,
 172                                    p2p->cfg->channel);
 173         if (freq < 0) {
 174                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 175                         "P2P: Unknown regulatory class/channel");
 176                 return;
 177         }
 178
 179         os_get_random((u8 *) &r, sizeof(r));
 180         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 181               p2p->min_disc_int) * 100;
 182
 183         p2p->pending_listen_freq = freq;
 184         p2p->pending_listen_sec = 0;
 185         p2p->pending_listen_usec = 1024 * tu;
 186
 187         ies = p2p_build_probe_resp_ies(p2p);
 188         if (ies == NULL)
 189                 return;
 190
 191         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 192                     ies) < 0) {
 193                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 194                         "P2P: Failed to start listen mode");
 195                 p2p->pending_listen_freq = 0;
 196         }
 197         wpabuf_free(ies);
 198 }
 199
 200
 201 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 202 {
 203         int freq;
 204         struct wpabuf *ies;
 205
 206         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 207                 "P2P: Going to listen(only) state");
 208
 209         freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class,
 210                                    p2p->cfg->channel);
 211         if (freq < 0) {
 212                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 213                         "P2P: Unknown regulatory class/channel");
 214                 return -1;
 215         }
 216
 217         p2p->pending_listen_freq = freq;
 218         p2p->pending_listen_sec = timeout / 1000;
 219         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 220
 221         if (p2p->p2p_scan_running) {
 222                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 223                         "P2P: p2p_scan running - delay start of listen state");
 224                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 225                 return 0;
 226         }
 227
 228         ies = p2p_build_probe_resp_ies(p2p);
 229         if (ies == NULL)
 230                 return -1;
 231
 232         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 233                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 234                         "P2P: Failed to start listen mode");
 235                 p2p->pending_listen_freq = 0;
 236                 wpabuf_free(ies);
 237                 return -1;
 238         }
 239         wpabuf_free(ies);
 240
 241         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 242
 243         return 0;
 244 }
 245
 246
 247 static void p2p_device_clear_reported(struct p2p_data *p2p)
 248 {
 249         struct p2p_device *dev;
 250         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
 251                 dev->flags &= ~P2P_DEV_REPORTED;
 252 }
 253
 254
 255 /**
 256  * p2p_get_device - Fetch a peer entry
 257  * @p2p: P2P module context from p2p_init()
 258  * @addr: P2P Device Address of the peer
 259  * Returns: Pointer to the device entry or %NULL if not found
 260  */
 261 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 262 {
 263         struct p2p_device *dev;
 264         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 265                 if (os_memcmp(dev->p2p_device_addr, addr, ETH_ALEN) == 0)
 266                         return dev;
 267         }
 268         return NULL;
 269 }
 270
 271
 272 /**
 273  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 274  * @p2p: P2P module context from p2p_init()
 275  * @addr: P2P Interface Address of the peer
 276  * Returns: Pointer to the device entry or %NULL if not found
 277  */
 278 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 279                                              const u8 *addr)
 280 {
 281         struct p2p_device *dev;
 282         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 283                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 284                         return dev;
 285         }
 286         return NULL;
 287 }
 288
 289
 290 /**
 291  * p2p_create_device - Create a peer entry
 292  * @p2p: P2P module context from p2p_init()
 293  * @addr: P2P Device Address of the peer
 294  * Returns: Pointer to the device entry or %NULL on failure
 295  *
 296  * If there is already an entry for the peer, it will be returned instead of
 297  * creating a new one.
 298  */
 299 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 300                                              const u8 *addr)
 301 {
 302         struct p2p_device *dev, *oldest = NULL;
 303         size_t count = 0;
 304
 305         dev = p2p_get_device(p2p, addr);
 306         if (dev)
 307                 return dev;
 308
 309         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 310                 count++;
 311                 if (oldest == NULL ||
 312                     os_time_before(&dev->last_seen, &oldest->last_seen))
 313                         oldest = dev;
 314         }
 315         if (count + 1 > p2p->cfg->max_peers && oldest) {
 316                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 317                         "P2P: Remove oldest peer entry to make room for a new "
 318                         "peer");
 319                 dl_list_del(&oldest->list);
 320                 p2p_device_free(p2p, oldest);
 321         }
 322
 323         dev = os_zalloc(sizeof(*dev));
 324         if (dev == NULL)
 325                 return NULL;
 326         dl_list_add(&p2p->devices, &dev->list);
 327         os_memcpy(dev->p2p_device_addr, addr, ETH_ALEN);
 328
 329         return dev;
 330 }
 331
 332
 333 static void p2p_copy_client_info(struct p2p_device *dev,
 334                                  struct p2p_client_info *cli)
 335 {
 336         os_memcpy(dev->device_name, cli->dev_name, cli->dev_name_len);
 337         dev->device_name[cli->dev_name_len] = '\0';
 338         dev->dev_capab = cli->dev_capab;
 339         dev->config_methods = cli->config_methods;
 340         os_memcpy(dev->pri_dev_type, cli->pri_dev_type, 8);
 341 }
 342
 343
 344 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 345                                  const u8 *go_interface_addr, int freq,
 346                                  const u8 *gi, size_t gi_len)
 347 {
 348         struct p2p_group_info info;
 349         size_t c;
 350         struct p2p_device *dev;
 351
 352         if (gi == NULL)
 353                 return 0;
 354
 355         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 356                 return -1;
 357
 358         /*
 359          * Clear old data for this group; if the devices are still in the
 360          * group, the information will be restored in the loop following this.
 361          */
 362         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 363                 if (os_memcpy(dev->member_in_go_iface, go_interface_addr,
 364                               ETH_ALEN) == 0) {
 365                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 366                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 367                 }
 368         }
 369
 370         for (c = 0; c < info.num_clients; c++) {
 371                 struct p2p_client_info *cli = &info.client[c];
 372                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 373                 if (dev) {
 374                         /*
 375                          * Update information only if we have not received this
 376                          * directly from the client.
 377                          */
 378                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 379                                           P2P_DEV_PROBE_REQ_ONLY))
 380                                 p2p_copy_client_info(dev, cli);
 381                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 382                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 383                         }
 384                 } else {
 385                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 386                         if (dev == NULL)
 387                                 continue;
 388                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 389                         p2p_copy_client_info(dev, cli);
 390                         dev->oper_freq = freq;
 391                         p2p->cfg->dev_found(
 392                                 p2p->cfg->cb_ctx, dev->p2p_device_addr,
 393                                 dev->p2p_device_addr, dev->pri_dev_type,
 394                                 dev->device_name, dev->config_methods,
 395                                 dev->dev_capab, 0);
 396                 }
 397
 398                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 399                           ETH_ALEN);
 400                 os_get_time(&dev->last_seen);
 401                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 402                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 403                           ETH_ALEN);
 404         }
 405
 406         return 0;
 407 }
 408
 409
 410 /**
 411  * p2p_add_device - Add peer entries based on scan results
 412  * @p2p: P2P module context from p2p_init()
 413  * @addr: Source address of Beacon or Probe Response frame (may be either
 414  *      P2P Device Address or P2P Interface Address)
 415  * @level: Signal level (signal strength of the received frame from the peer)
 416  * @freq: Frequency on which the Beacon or Probe Response frame was received
 417  * @ies: IEs from the Beacon or Probe Response frame
 418  * @ies_len: Length of ies buffer in octets
 419  * Returns: 0 on success, -1 on failure
 420  *
 421  * If the scan result is for a GO, the clients in the group will also be added
 422  * to the peer table.
 423  */
 424 static int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 425                           int level, const u8 *ies, size_t ies_len)
 426 {
 427         struct p2p_device *dev;
 428         struct p2p_message msg;
 429         const u8 *p2p_dev_addr;
 430
 431         os_memset(&msg, 0, sizeof(msg));
 432         if (p2p_parse_ies(ies, ies_len, &msg)) {
 433                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 434                         "P2P: Failed to parse P2P IE for a device entry");
 435                 p2p_parse_free(&msg);
 436                 return -1;
 437         }
 438
 439         if (msg.p2p_device_addr)
 440                 p2p_dev_addr = msg.p2p_device_addr;
 441         else if (msg.device_id)
 442                 p2p_dev_addr = msg.device_id;
 443         else {
 444                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 445                         "P2P: Ignore scan data without P2P Device Info or "
 446                         "P2P Device Id");
 447                 p2p_parse_free(&msg);
 448                 return -1;
 449         }
 450
 451         if (!is_zero_ether_addr(p2p->peer_filter) &&
 452             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 453                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Do not add peer "
 454                         "filter for " MACSTR " due to peer filter",
 455                         MAC2STR(p2p_dev_addr));
 456                 return 0;
 457         }
 458
 459         dev = p2p_create_device(p2p, p2p_dev_addr);
 460         if (dev == NULL) {
 461                 p2p_parse_free(&msg);
 462                 return -1;
 463         }
 464         os_get_time(&dev->last_seen);
 465         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 466
 467         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 468                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 469         if (msg.ssid &&
 470             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 471              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 472              != 0)) {
 473                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 474                 dev->oper_ssid_len = msg.ssid[1];
 475         }
 476
 477         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 478             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 479                 int ds_freq;
 480                 if (*msg.ds_params == 14)
 481                         ds_freq = 2484;
 482                 else
 483                         ds_freq = 2407 + *msg.ds_params * 5;
 484                 if (freq != ds_freq) {
 485                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 486                                 "P2P: Update Listen frequency based on DS "
 487                                 "Parameter Set IE: %d -> %d MHz",
 488                                 freq, ds_freq);
 489                         freq = ds_freq;
 490                 }
 491         }
 492
 493         if (dev->listen_freq && dev->listen_freq != freq) {
 494                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 495                         "P2P: Update Listen frequency based on scan "
 496                         "results (" MACSTR " %d -> %d MHz (DS param %d)",
 497                         MAC2STR(dev->p2p_device_addr), dev->listen_freq, freq,
 498                         msg.ds_params ? *msg.ds_params : -1);
 499         }
 500         dev->listen_freq = freq;
 501         dev->level = level;
 502
 503         if (msg.pri_dev_type)
 504                 os_memcpy(dev->pri_dev_type, msg.pri_dev_type,
 505                           sizeof(dev->pri_dev_type));
 506         os_memcpy(dev->device_name, msg.device_name, sizeof(dev->device_name));
 507         dev->config_methods = msg.config_methods ? msg.config_methods :
 508                 msg.wps_config_methods;
 509         if (msg.capability) {
 510                 dev->dev_capab = msg.capability[0];
 511                 dev->group_capab = msg.capability[1];
 512         }
 513
 514         if (msg.ext_listen_timing) {
 515                 dev->ext_listen_period = WPA_GET_LE16(msg.ext_listen_timing);
 516                 dev->ext_listen_interval =
 517                         WPA_GET_LE16(msg.ext_listen_timing + 2);
 518         }
 519
 520         p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, msg.group_info,
 521                               msg.group_info_len);
 522
 523         p2p_parse_free(&msg);
 524
 525         if (p2p_pending_sd_req(p2p, dev))
 526                 dev->flags |= P2P_DEV_SD_SCHEDULE;
 527
 528         if (dev->flags & P2P_DEV_REPORTED)
 529                 return 0;
 530
 531         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 532                 "P2P: Peer found with Listen frequency %d MHz", freq);
 533         if (dev->flags & P2P_DEV_USER_REJECTED) {
 534                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 535                         "P2P: Do not report rejected device");
 536                 return 0;
 537         }
 538         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, dev->p2p_device_addr,
 539                             dev->pri_dev_type, dev->device_name,
 540                             dev->config_methods, dev->dev_capab,
 541                             dev->group_capab);
 542         dev->flags |= P2P_DEV_REPORTED;
 543
 544         return 0;
 545 }
 546
 547
 548 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 549 {
 550         if (p2p->go_neg_peer == dev)
 551                 p2p->go_neg_peer = NULL;
 552         if (p2p->invite_peer == dev)
 553                 p2p->invite_peer = NULL;
 554         if (p2p->sd_peer == dev)
 555                 p2p->sd_peer = NULL;
 556         if (p2p->pending_client_disc_go == dev)
 557                 p2p->pending_client_disc_go = NULL;
 558
 559         os_free(dev);
 560 }
 561
 562
 563 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 564 {
 565         struct p2p_channels *c;
 566         struct p2p_reg_class *cla;
 567         size_t cl, ch;
 568         int found = 0;
 569         u8 reg_class;
 570         u8 channel;
 571         int freq;
 572
 573         c = &p2p->cfg->channels;
 574         for (cl = 0; cl < c->reg_classes; cl++) {
 575                 cla = &c->reg_class[cl];
 576                 if (cla->reg_class != p2p->last_prog_scan_class)
 577                         continue;
 578                 for (ch = 0; ch < cla->channels; ch++) {
 579                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 580                                 found = 1;
 581                                 break;
 582                         }
 583                 }
 584                 if (found)
 585                         break;
 586         }
 587
 588         if (!found) {
 589                 /* Start from beginning */
 590                 reg_class = c->reg_class[0].reg_class;
 591                 channel = c->reg_class[0].channel[0];
 592         } else {
 593                 /* Pick the next channel */
 594                 ch++;
 595                 if (ch == cla->channels) {
 596                         cl++;
 597                         if (cl == c->reg_classes)
 598                                 cl = 0;
 599                         ch = 0;
 600                 }
 601                 reg_class = c->reg_class[cl].reg_class;
 602                 channel = c->reg_class[cl].channel[ch];
 603         }
 604
 605         freq = p2p_channel_to_freq(p2p->cfg->country, reg_class, channel);
 606         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Next progressive search "
 607                 "channel: reg_class %u channel %u -> %d MHz",
 608                 reg_class, channel, freq);
 609         p2p->last_prog_scan_class = reg_class;
 610         p2p->last_prog_scan_chan = channel;
 611
 612         if (freq == 2412 || freq == 2437 || freq == 2462)
 613                 return 0; /* No need to add social channels */
 614         return freq;
 615 }
 616
 617
 618 static void p2p_search(struct p2p_data *p2p)
 619 {
 620         int freq = 0;
 621         enum p2p_scan_type type;
 622
 623         if (p2p->drv_in_listen) {
 624                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is still "
 625                         "in Listen state - wait for it to end before "
 626                         "continuing");
 627                 return;
 628         }
 629         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 630
 631         if (p2p->go_neg_peer) {
 632                 /*
 633                  * Only scan the known listen frequency of the peer
 634                  * during GO Negotiation start.
 635                  */
 636                 freq = p2p->go_neg_peer->listen_freq;
 637                 if (freq <= 0)
 638                         freq = p2p->go_neg_peer->oper_freq;
 639                 type = P2P_SCAN_SPECIFIC;
 640                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search "
 641                         "for freq %u (GO Neg)", freq);
 642         } else if (p2p->invite_peer) {
 643                 /*
 644                  * Only scan the known listen frequency of the peer
 645                  * during Invite start.
 646                  */
 647                 freq = p2p->invite_peer->listen_freq;
 648                 if (freq <= 0)
 649                         freq = p2p->invite_peer->oper_freq;
 650                 type = P2P_SCAN_SPECIFIC;
 651                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search "
 652                         "for freq %u (Invite)", freq);
 653         } else if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 654                    (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 655                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 656                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search "
 657                         "(+ freq %u)", freq);
 658         } else {
 659                 type = P2P_SCAN_SOCIAL;
 660                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search");
 661         }
 662
 663         if (p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq) < 0) {
 664                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 665                         "P2P: Scan request failed");
 666                 p2p_continue_find(p2p);
 667         } else {
 668                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan");
 669                 p2p->p2p_scan_running = 1;
 670                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
 671                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
 672                                        p2p, NULL);
 673         }
 674 }
 675
 676
 677 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
 678 {
 679         struct p2p_data *p2p = eloop_ctx;
 680         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Find timeout -> stop");
 681         p2p_stop_find(p2p);
 682 }
 683
 684
 685 static int p2p_run_after_scan(struct p2p_data *p2p)
 686 {
 687         struct p2p_device *dev;
 688         enum p2p_after_scan op;
 689
 690         op = p2p->start_after_scan;
 691         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
 692         switch (op) {
 693         case P2P_AFTER_SCAN_NOTHING:
 694                 break;
 695         case P2P_AFTER_SCAN_LISTEN:
 696                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously "
 697                         "requested Listen state");
 698                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
 699                            p2p->pending_listen_usec / 1000);
 700                 return 1;
 701         case P2P_AFTER_SCAN_CONNECT:
 702                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously "
 703                         "requested connect with " MACSTR,
 704                         MAC2STR(p2p->after_scan_peer));
 705                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
 706                 if (dev == NULL) {
 707                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer not "
 708                                 "known anymore");
 709                         break;
 710                 }
 711                 p2p_connect_send(p2p, dev);
 712                 return 1;
 713         }
 714
 715         return 0;
 716 }
 717
 718
 719 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 720 {
 721         struct p2p_data *p2p = eloop_ctx;
 722         int running;
 723         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan timeout "
 724                 "(running=%d)", p2p->p2p_scan_running);
 725         running = p2p->p2p_scan_running;
 726         /* Make sure we recover from missed scan results callback */
 727         p2p->p2p_scan_running = 0;
 728
 729         if (running)
 730                 p2p_run_after_scan(p2p);
 731 }
 732
 733
 734 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
 735              enum p2p_discovery_type type)
 736 {
 737         int res;
 738
 739         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting find (type=%d)",
 740                 type);
 741         if (p2p->p2p_scan_running) {
 742                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan is "
 743                         "already running");
 744         }
 745         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
 746         p2p_clear_timeout(p2p);
 747         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 748         p2p->find_type = type;
 749         p2p_device_clear_reported(p2p);
 750         p2p_set_state(p2p, P2P_SEARCH);
 751         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
 752         if (timeout)
 753                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
 754                                        p2p, NULL);
 755         switch (type) {
 756         case P2P_FIND_START_WITH_FULL:
 757         case P2P_FIND_PROGRESSIVE:
 758                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0);
 759                 break;
 760         case P2P_FIND_ONLY_SOCIAL:
 761                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0);
 762                 break;
 763         default:
 764                 return -1;
 765         }
 766
 767         if (res == 0) {
 768                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan");
 769                 p2p->p2p_scan_running = 1;
 770                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
 771                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
 772                                        p2p, NULL);
 773         } else {
 774                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start "
 775                         "p2p_scan");
 776         }
 777
 778         return res;
 779 }
 780
 781
 782 void p2p_stop_find(struct p2p_data *p2p)
 783 {
 784         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopping find");
 785         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
 786         p2p_clear_timeout(p2p);
 787         p2p_set_state(p2p, P2P_IDLE);
 788         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
 789         p2p->go_neg_peer = NULL;
 790         p2p->sd_peer = NULL;
 791         p2p->invite_peer = NULL;
 792         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 793 }
 794
 795
 796 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
 797                 enum p2p_wps_method wps_method,
 798                 int go_intent, const u8 *own_interface_addr,
 799                 unsigned int force_freq, int persistent_group)
 800 {
 801         struct p2p_device *dev;
 802
 803         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 804                 "P2P: Request to start group negotiation - peer=" MACSTR
 805                 "  GO Intent=%d  Intended Interface Address=" MACSTR
 806                 " wps_method=%d persistent_group=%d",
 807                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
 808                 wps_method, persistent_group);
 809
 810         if (force_freq) {
 811                 if (p2p_freq_to_channel(p2p->cfg->country, force_freq,
 812                                         &p2p->op_reg_class, &p2p->op_channel) <
 813                     0) {
 814                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 815                                 "P2P: Unsupported frequency %u MHz",
 816                                 force_freq);
 817                         return -1;
 818                 }
 819                 p2p->channels.reg_classes = 1;
 820                 p2p->channels.reg_class[0].channels = 1;
 821                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
 822                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
 823         } else {
 824                 p2p->op_reg_class = p2p->cfg->op_reg_class;
 825                 p2p->op_channel = p2p->cfg->op_channel;
 826                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
 827                           sizeof(struct p2p_channels));
 828         }
 829         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 830                 "P2P: Own preference for operation channel: "
 831                 "Regulatory Class %u Channel %u%s",
 832                 p2p->op_reg_class, p2p->op_channel,
 833                 force_freq ? " (forced)" : "");
 834
 835         dev = p2p_get_device(p2p, peer_addr);
 836         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
 837                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 838                         "P2P: Cannot connect to unknown P2P Device " MACSTR,
 839                         MAC2STR(peer_addr));
 840                 return -1;
 841         }
 842
 843         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
 844                 if (!(dev->dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
 845                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 846                                 "P2P: Cannot connect to P2P Device " MACSTR
 847                                 " that is in a group and is not discoverable",
 848                                 MAC2STR(peer_addr));
 849                         return -1;
 850                 }
 851                 if (dev->oper_freq <= 0) {
 852                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 853                                 "P2P: Cannot connect to P2P Device " MACSTR
 854                                 " with incomplete information",
 855                                 MAC2STR(peer_addr));
 856                         return -1;
 857                 }
 858
 859                 /*
 860                  * First, try to connect directly. If the peer does not
 861                  * acknowledge frames, assume it is sleeping and use device
 862                  * discoverability via the GO at that point.
 863                  */
 864         }
 865
 866         dev->flags &= ~P2P_DEV_NOT_YET_READY;
 867         dev->flags &= ~P2P_DEV_USER_REJECTED;
 868         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
 869         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
 870         dev->go_neg_req_sent = 0;
 871         dev->go_state = UNKNOWN_GO;
 872         if (persistent_group)
 873                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
 874         else
 875                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_GROUP;
 876         p2p->go_intent = go_intent;
 877         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
 878
 879         if (p2p->state != P2P_IDLE)
 880                 p2p_stop_find(p2p);
 881
 882         dev->wps_method = wps_method;
 883         dev->status = P2P_SC_SUCCESS;
 884
 885         if (force_freq)
 886                 dev->flags |= P2P_DEV_FORCE_FREQ;
 887         else
 888                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
 889
 890         if (p2p->p2p_scan_running) {
 891                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 892                         "P2P: p2p_scan running - delay connect send");
 893                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
 894                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
 895                 return 0;
 896         }
 897         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
 898
 899         return p2p_connect_send(p2p, dev);
 900 }
 901
 902
 903 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
 904                   enum p2p_wps_method wps_method,
 905                   int go_intent, const u8 *own_interface_addr,
 906                   unsigned int force_freq, int persistent_group)
 907 {
 908         struct p2p_device *dev;
 909
 910         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 911                 "P2P: Request to authorize group negotiation - peer=" MACSTR
 912                 "  GO Intent=%d  Intended Interface Address=" MACSTR
 913                 " wps_method=%d  persistent_group=%d",
 914                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
 915                 wps_method, persistent_group);
 916
 917         if (force_freq) {
 918                 if (p2p_freq_to_channel(p2p->cfg->country, force_freq,
 919                                         &p2p->op_reg_class, &p2p->op_channel) <
 920                     0) {
 921                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 922                                 "P2P: Unsupported frequency %u MHz",
 923                                 force_freq);
 924                         return -1;
 925                 }
 926                 p2p->channels.reg_classes = 1;
 927                 p2p->channels.reg_class[0].channels = 1;
 928                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
 929                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
 930         } else {
 931                 p2p->op_reg_class = p2p->cfg->op_reg_class;
 932                 p2p->op_channel = p2p->cfg->op_channel;
 933                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
 934                           sizeof(struct p2p_channels));
 935         }
 936         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 937                 "P2P: Own preference for operation channel: "
 938                 "Regulatory Class %u Channel %u%s",
 939                 p2p->op_reg_class, p2p->op_channel,
 940                 force_freq ? " (forced)" : "");
 941
 942         dev = p2p_get_device(p2p, peer_addr);
 943         if (dev == NULL) {
 944                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 945                         "P2P: Cannot authorize unknown P2P Device " MACSTR,
 946                         MAC2STR(peer_addr));
 947                 return -1;
 948         }
 949
 950         dev->flags &= ~P2P_DEV_NOT_YET_READY;
 951         dev->flags &= ~P2P_DEV_USER_REJECTED;
 952         dev->go_neg_req_sent = 0;
 953         dev->go_state = UNKNOWN_GO;
 954         if (persistent_group)
 955                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
 956         else
 957                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_GROUP;
 958         p2p->go_intent = go_intent;
 959         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
 960
 961         dev->wps_method = wps_method;
 962         dev->status = P2P_SC_SUCCESS;
 963
 964         if (force_freq)
 965                 dev->flags |= P2P_DEV_FORCE_FREQ;
 966         else
 967                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
 968
 969         return 0;
 970 }
 971
 972
 973 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
 974                       struct p2p_device *dev, struct p2p_message *msg)
 975 {
 976         os_get_time(&dev->last_seen);
 977
 978         if (msg->pri_dev_type)
 979                 os_memcpy(dev->pri_dev_type, msg->pri_dev_type,
 980                           sizeof(dev->pri_dev_type));
 981         os_memcpy(dev->device_name, msg->device_name,
 982                   sizeof(dev->device_name));
 983         dev->config_methods = msg->config_methods ? msg->config_methods :
 984                 msg->wps_config_methods;
 985         if (msg->capability) {
 986                 dev->dev_capab = msg->capability[0];
 987                 dev->group_capab = msg->capability[1];
 988         }
 989         if (msg->listen_channel) {
 990                 int freq;
 991                 freq = p2p_channel_to_freq((char *) msg->listen_channel,
 992                                            msg->listen_channel[3],
 993                                            msg->listen_channel[4]);
 994                 if (freq < 0) {
 995                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 996                                 "P2P: Unknown peer Listen channel: "
 997                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
 998                                 msg->listen_channel[0],
 999                                 msg->listen_channel[1],
1000                                 msg->listen_channel[2],
1001                                 msg->listen_channel[3],
1002                                 msg->listen_channel[4]);
1003                 } else {
1004                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update "
1005                                 "peer " MACSTR " Listen channel: %u -> %u MHz",
1006                                 MAC2STR(dev->p2p_device_addr),
1007                                 dev->listen_freq, freq);
1008                         dev->listen_freq = freq;
1009                 }
1010         }
1011         if (msg->ext_listen_timing) {
1012                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
1013                 dev->ext_listen_interval =
1014                         WPA_GET_LE16(msg->ext_listen_timing + 2);
1015         }
1016
1017         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1018                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1019                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1020                         "P2P: Completed device entry based on data from "
1021                         "GO Negotiation Request");
1022         } else {
1023                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1024                         "P2P: Created device entry based on GO Neg Req: "
1025                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1026                         "listen_freq=%d",
1027                         MAC2STR(dev->p2p_device_addr), dev->dev_capab,
1028                         dev->group_capab, dev->device_name, dev->listen_freq);
1029         }
1030
1031         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1032
1033         if (dev->flags & P2P_DEV_USER_REJECTED) {
1034                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1035                         "P2P: Do not report rejected device");
1036                 return;
1037         }
1038
1039         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, dev->p2p_device_addr,
1040                             dev->pri_dev_type, dev->device_name,
1041                             dev->config_methods, dev->dev_capab,
1042                             dev->group_capab);
1043 }
1044
1045
1046 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1047 {
1048         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1049         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1050         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1051                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1052         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1053 }
1054
1055
1056 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1057 {
1058         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1059         p2p_random(params->passphrase, 8);
1060         return 0;
1061 }
1062
1063
1064 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1065 {
1066         struct p2p_go_neg_results res;
1067         int go = peer->go_state == LOCAL_GO;
1068         struct p2p_channels intersection;
1069         int freqs;
1070         size_t i, j;
1071
1072         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1073                 "P2P: GO Negotiation with " MACSTR " completed (%s will be "
1074                 "GO)", MAC2STR(peer->p2p_device_addr),
1075                 go ? "local end" : "peer");
1076
1077         os_memset(&res, 0, sizeof(res));
1078         res.role_go = go;
1079         os_memcpy(res.peer_device_addr, peer->p2p_device_addr, ETH_ALEN);
1080         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1081         res.wps_method = peer->wps_method;
1082         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP)
1083                 res.persistent_group = 1;
1084
1085         if (go) {
1086                 /* Setup AP mode for WPS provisioning */
1087                 res.freq = p2p_channel_to_freq(p2p->cfg->country,
1088                                                p2p->op_reg_class,
1089                                                p2p->op_channel);
1090                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1091                 res.ssid_len = p2p->ssid_len;
1092                 p2p_random(res.passphrase, 8);
1093         } else
1094                 res.freq = peer->oper_freq;
1095
1096         p2p_channels_intersect(&p2p->channels, &peer->channels,
1097                                &intersection);
1098         freqs = 0;
1099         for (i = 0; i < intersection.reg_classes; i++) {
1100                 struct p2p_reg_class *c = &intersection.reg_class[i];
1101                 if (freqs + 1 == P2P_MAX_CHANNELS)
1102                         break;
1103                 for (j = 0; j < c->channels; j++) {
1104                         int freq;
1105                         if (freqs + 1 == P2P_MAX_CHANNELS)
1106                                 break;
1107                         freq = p2p_channel_to_freq(peer->country, c->reg_class,
1108                                                    c->channel[j]);
1109                         if (freq < 0)
1110                                 continue;
1111                         res.freq_list[freqs++] = freq;
1112                 }
1113         }
1114
1115         p2p_clear_timeout(p2p);
1116         peer->go_neg_req_sent = 0;
1117         peer->wps_method = WPS_NOT_READY;
1118
1119         p2p_set_state(p2p, P2P_PROVISIONING);
1120         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1121 }
1122
1123
1124 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1125                               const u8 *data, size_t len, int rx_freq)
1126 {
1127         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1128                 "P2P: RX P2P Public Action from " MACSTR, MAC2STR(sa));
1129         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1130
1131         if (len < 1)
1132                 return;
1133
1134         switch (data[0]) {
1135         case P2P_GO_NEG_REQ:
1136                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1137                 break;
1138         case P2P_GO_NEG_RESP:
1139                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1140                 break;
1141         case P2P_GO_NEG_CONF:
1142                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1143                 break;
1144         case P2P_INVITATION_REQ:
1145                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1146                                            rx_freq);
1147                 break;
1148         case P2P_INVITATION_RESP:
1149                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1150                 break;
1151         case P2P_PROV_DISC_REQ:
1152                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1153                 break;
1154         case P2P_PROV_DISC_RESP:
1155                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1156                 break;
1157         case P2P_DEV_DISC_REQ:
1158                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1159                 break;
1160         case P2P_DEV_DISC_RESP:
1161                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1162                 break;
1163         default:
1164                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1165                         "P2P: Unsupported P2P Public Action frame type %d",
1166                         data[0]);
1167                 break;
1168         }
1169 }
1170
1171
1172 void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1173                           const u8 *bssid, const u8 *data, size_t len,
1174                           int freq)
1175 {
1176         if (len < 1)
1177                 return;
1178
1179         switch (data[0]) {
1180         case WLAN_PA_VENDOR_SPECIFIC:
1181                 data++;
1182                 len--;
1183                 if (len < 3)
1184                         return;
1185                 if (WPA_GET_BE24(data) != OUI_WFA)
1186                         return;
1187
1188                 data += 3;
1189                 len -= 3;
1190                 if (len < 1)
1191                         return;
1192
1193                 if (*data != P2P_OUI_TYPE)
1194                         return;
1195
1196                 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq);
1197                 break;
1198         case WLAN_PA_GAS_INITIAL_REQ:
1199                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1200                 break;
1201         case WLAN_PA_GAS_INITIAL_RESP:
1202                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1203                 break;
1204         case WLAN_PA_GAS_COMEBACK_REQ:
1205                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1206                 break;
1207         case WLAN_PA_GAS_COMEBACK_RESP:
1208                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1209                 break;
1210         }
1211 }
1212
1213
1214 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1215                    const u8 *bssid, u8 category,
1216                    const u8 *data, size_t len, int freq)
1217 {
1218         if (category == WLAN_ACTION_PUBLIC) {
1219                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1220                 return;
1221         }
1222
1223         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1224                 return;
1225
1226         if (len < 4)
1227                 return;
1228
1229         if (WPA_GET_BE24(data) != OUI_WFA)
1230                 return;
1231         data += 3;
1232         len -= 3;
1233
1234         if (*data != P2P_OUI_TYPE)
1235                 return;
1236         data++;
1237         len--;
1238
1239         /* P2P action frame */
1240         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1241                 "P2P: RX P2P Action from " MACSTR, MAC2STR(sa));
1242         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1243
1244         if (len < 1)
1245                 return;
1246         switch (data[0]) {
1247         case P2P_NOA:
1248                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1249                         "P2P: Received P2P Action - Notice of Absence");
1250                 /* TODO */
1251                 break;
1252         case P2P_PRESENCE_REQ:
1253                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1254                 break;
1255         case P2P_PRESENCE_RESP:
1256                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1257                 break;
1258         case P2P_GO_DISC_REQ:
1259                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1260                 break;
1261         default:
1262                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1263                         "P2P: Received P2P Action - unknown type %u", data[0]);
1264                 break;
1265         }
1266 }
1267
1268
1269 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1270 {
1271         struct p2p_data *p2p = eloop_ctx;
1272         if (p2p->go_neg_peer == NULL)
1273                 return;
1274         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1275         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1276         p2p_connect_send(p2p, p2p->go_neg_peer);
1277 }
1278
1279
1280 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1281 {
1282         struct p2p_data *p2p = eloop_ctx;
1283         if (p2p->invite_peer == NULL)
1284                 return;
1285         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1286         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr);
1287 }
1288
1289
1290 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1291                                        const u8 *ie, size_t ie_len)
1292 {
1293         struct p2p_message msg;
1294         struct p2p_device *dev;
1295
1296         os_memset(&msg, 0, sizeof(msg));
1297         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1298         {
1299                 p2p_parse_free(&msg);
1300                 return; /* not a P2P probe */
1301         }
1302
1303         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1304             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1305             != 0) {
1306                 /* The Probe Request is not part of P2P Device Discovery. It is
1307                  * not known whether the source address of the frame is the P2P
1308                  * Device Address or P2P Interface Address. Do not add a new
1309                  * peer entry based on this frames.
1310                  */
1311                 p2p_parse_free(&msg);
1312                 return;
1313         }
1314
1315         dev = p2p_get_device(p2p, addr);
1316         if (dev) {
1317                 if (dev->country[0] == 0 && msg.listen_channel)
1318                         os_memcpy(dev->country, msg.listen_channel, 3);
1319                 p2p_parse_free(&msg);
1320                 return; /* already known */
1321         }
1322
1323         dev = p2p_create_device(p2p, addr);
1324         if (dev == NULL) {
1325                 p2p_parse_free(&msg);
1326                 return;
1327         }
1328
1329         os_get_time(&dev->last_seen);
1330         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1331
1332         if (msg.capability) {
1333                 dev->dev_capab = msg.capability[0];
1334                 dev->group_capab = msg.capability[1];
1335         }
1336
1337         if (msg.listen_channel) {
1338                 os_memcpy(dev->country, msg.listen_channel, 3);
1339                 dev->listen_freq = p2p_channel_to_freq(dev->country,
1340                                                        msg.listen_channel[3],
1341                                                        msg.listen_channel[4]);
1342         }
1343
1344         os_memcpy(dev->device_name, msg.device_name, sizeof(dev->device_name));
1345
1346         if (msg.wps_pri_dev_type)
1347                 os_memcpy(dev->pri_dev_type, msg.wps_pri_dev_type,
1348                           sizeof(dev->pri_dev_type));
1349
1350         p2p_parse_free(&msg);
1351
1352         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1353                 "P2P: Created device entry based on Probe Req: " MACSTR
1354                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1355                 MAC2STR(dev->p2p_device_addr), dev->dev_capab,
1356                 dev->group_capab, dev->device_name, dev->listen_freq);
1357 }
1358
1359
1360 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1361                                                 const u8 *addr,
1362                                                 struct p2p_message *msg)
1363 {
1364         struct p2p_device *dev;
1365
1366         dev = p2p_get_device(p2p, addr);
1367         if (dev) {
1368                 os_get_time(&dev->last_seen);
1369                 return dev; /* already known */
1370         }
1371
1372         dev = p2p_create_device(p2p, addr);
1373         if (dev == NULL)
1374                 return NULL;
1375
1376         p2p_add_dev_info(p2p, addr, dev, msg);
1377
1378         return dev;
1379 }
1380
1381
1382 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1383 {
1384         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1385                 return 1;
1386         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1387             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1388             WPA_GET_BE16(&req_dev_type[6]) == 0)
1389                 return 1; /* Category match with wildcard OUI/sub-category */
1390         return 0;
1391 }
1392
1393
1394 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1395                         size_t num_req_dev_type)
1396 {
1397         size_t i;
1398         for (i = 0; i < num_req_dev_type; i++) {
1399                 if (dev_type_match(dev_type, req_dev_type[i]))
1400                         return 1;
1401         }
1402         return 0;
1403 }
1404
1405
1406 /**
1407  * p2p_match_dev_type - Match local device type with requested type
1408  * @p2p: P2P module context from p2p_init()
1409  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1410  * Returns: 1 on match, 0 on mismatch
1411  *
1412  * This function can be used to match the Requested Device Type attribute in
1413  * WPS IE with the local device types for deciding whether to reply to a Probe
1414  * Request frame.
1415  */
1416 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1417 {
1418         struct wps_parse_attr attr;
1419         size_t i;
1420
1421         if (wps_parse_msg(wps, &attr))
1422                 return 1; /* assume no Requested Device Type attributes */
1423
1424         if (attr.num_req_dev_type == 0)
1425                 return 1; /* no Requested Device Type attributes -> match */
1426
1427         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1428                                 attr.num_req_dev_type))
1429                 return 1; /* Own Primary Device Type matches */
1430
1431         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1432                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1433                                         attr.req_dev_type,
1434                                         attr.num_req_dev_type))
1435                 return 1; /* Own Secondary Device Type matches */
1436
1437         /* No matching device type found */
1438         return 0;
1439 }
1440
1441
1442 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1443 {
1444         struct wpabuf *buf;
1445         u8 *len;
1446
1447         buf = wpabuf_alloc(1000);
1448         if (buf == NULL)
1449                 return NULL;
1450
1451         /* TODO: add more info into WPS IE; maybe get from WPS module? */
1452         p2p_build_wps_ie(p2p, buf, DEV_PW_DEFAULT, 1);
1453
1454         /* P2P IE */
1455         len = p2p_buf_add_ie_hdr(buf);
1456         p2p_buf_add_capability(buf, p2p->dev_capab, 0);
1457         if (p2p->ext_listen_interval)
1458                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
1459                                               p2p->ext_listen_interval);
1460         p2p_buf_add_device_info(buf, p2p, NULL);
1461         p2p_buf_update_ie_hdr(buf, len);
1462
1463         return buf;
1464 }
1465
1466
1467 static void p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *ie,
1468                             size_t ie_len)
1469 {
1470         struct ieee802_11_elems elems;
1471         struct wpabuf *buf;
1472         struct ieee80211_mgmt *resp;
1473         struct wpabuf *wps;
1474         struct wpabuf *ies;
1475
1476         if (!p2p->in_listen || !p2p->drv_in_listen) {
1477                 /* not in Listen state - ignore Probe Request */
1478                 return;
1479         }
1480
1481         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
1482             ParseFailed) {
1483                 /* Ignore invalid Probe Request frames */
1484                 return;
1485         }
1486
1487         if (elems.p2p == NULL) {
1488                 /* not a P2P probe - ignore it */
1489                 return;
1490         }
1491
1492         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
1493             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
1494             0) {
1495                 /* not using P2P Wildcard SSID - ignore */
1496                 return;
1497         }
1498
1499         /* Check Requested Device Type match */
1500         wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
1501         if (wps && !p2p_match_dev_type(p2p, wps)) {
1502                 wpabuf_free(wps);
1503                 /* No match with Requested Device Type */
1504                 return;
1505         }
1506         wpabuf_free(wps);
1507
1508         if (!p2p->cfg->send_probe_resp)
1509                 return; /* Response generated elsewhere */
1510
1511         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1512                 "P2P: Reply to P2P Probe Request in Listen state");
1513
1514         /*
1515          * We do not really have a specific BSS that this frame is advertising,
1516          * so build a frame that has some information in valid format. This is
1517          * really only used for discovery purposes, not to learn exact BSS
1518          * parameters.
1519          */
1520         ies = p2p_build_probe_resp_ies(p2p);
1521         if (ies == NULL)
1522                 return;
1523
1524         buf = wpabuf_alloc(200 + wpabuf_len(ies));
1525         if (buf == NULL) {
1526                 wpabuf_free(ies);
1527                 return;
1528         }
1529
1530         resp = NULL;
1531         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
1532
1533         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
1534                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
1535         os_memcpy(resp->da, addr, ETH_ALEN);
1536         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
1537         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
1538         resp->u.probe_resp.beacon_int = host_to_le16(100);
1539         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1540         resp->u.probe_resp.capab_info =
1541                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
1542                              WLAN_CAPABILITY_PRIVACY |
1543                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
1544
1545         wpabuf_put_u8(buf, WLAN_EID_SSID);
1546         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
1547         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1548
1549         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
1550         wpabuf_put_u8(buf, 8);
1551         wpabuf_put_u8(buf, (60 / 5) | 0x80);
1552         wpabuf_put_u8(buf, 90 / 5);
1553         wpabuf_put_u8(buf, (120 / 5) | 0x80);
1554         wpabuf_put_u8(buf, 180 / 5);
1555         wpabuf_put_u8(buf, (240 / 5) | 0x80);
1556         wpabuf_put_u8(buf, 360 / 5);
1557         wpabuf_put_u8(buf, 480 / 5);
1558         wpabuf_put_u8(buf, 540 / 5);
1559
1560         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
1561         wpabuf_put_u8(buf, 1);
1562         wpabuf_put_u8(buf, p2p->cfg->channel);
1563
1564         wpabuf_put_buf(buf, ies);
1565         wpabuf_free(ies);
1566
1567         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
1568
1569         wpabuf_free(buf);
1570 }
1571
1572
1573 int p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *ie,
1574                      size_t ie_len)
1575 {
1576         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
1577
1578         p2p_reply_probe(p2p, addr, ie, ie_len);
1579
1580         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
1581             p2p->go_neg_peer &&
1582             os_memcmp(addr, p2p->go_neg_peer->p2p_device_addr, ETH_ALEN) == 0)
1583         {
1584                 /* Received a Probe Request from GO Negotiation peer */
1585                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1586                         "P2P: Found GO Negotiation peer - try to start GO "
1587                         "negotiation from timeout");
1588                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
1589                 return 1;
1590         }
1591
1592         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
1593             p2p->invite_peer &&
1594             os_memcmp(addr, p2p->invite_peer->p2p_device_addr, ETH_ALEN) == 0)
1595         {
1596                 /* Received a Probe Request from Invite peer */
1597                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1598                         "P2P: Found Invite peer - try to start Invite from "
1599                         "timeout");
1600                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
1601                 return 1;
1602         }
1603
1604         return 0;
1605 }
1606
1607
1608 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
1609                                     u8 *buf, size_t len)
1610 {
1611         struct wpabuf *tmp;
1612         u8 *lpos;
1613         size_t tmplen;
1614         int res;
1615
1616         if (!(p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
1617                 return 0;
1618
1619         /*
1620          * (Re)Association Request - P2P IE
1621          * P2P Capability attribute (shall be present)
1622          * P2P Interface attribute (present if concurrent device)
1623          */
1624         tmp = wpabuf_alloc(200);
1625         if (tmp == NULL)
1626                 return -1;
1627
1628         lpos = p2p_buf_add_ie_hdr(tmp);
1629         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
1630         if (p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER)
1631                 p2p_buf_add_p2p_interface(tmp, p2p);
1632         p2p_buf_update_ie_hdr(tmp, lpos);
1633
1634         tmplen = wpabuf_len(tmp);
1635         if (tmplen > len)
1636                 res = -1;
1637         else {
1638                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
1639                 res = tmplen;
1640         }
1641         wpabuf_free(tmp);
1642
1643         return res;
1644 }
1645
1646
1647 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
1648                      size_t len, int p2p_group)
1649 {
1650         struct wpabuf *tmp;
1651         u8 *lpos;
1652         struct p2p_device *peer;
1653         size_t tmplen;
1654         int res;
1655
1656         if (!p2p_group)
1657                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len);
1658
1659         /*
1660          * (Re)Association Request - P2P IE
1661          * P2P Capability attribute (shall be present)
1662          * Extended Listen Timing (may be present)
1663          * P2P Device Info attribute (shall be present)
1664          */
1665         tmp = wpabuf_alloc(200);
1666         if (tmp == NULL)
1667                 return -1;
1668
1669         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
1670
1671         lpos = p2p_buf_add_ie_hdr(tmp);
1672         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
1673         p2p_buf_add_device_info(tmp, p2p, peer);
1674         p2p_buf_update_ie_hdr(tmp, lpos);
1675
1676         tmplen = wpabuf_len(tmp);
1677         if (tmplen > len)
1678                 res = -1;
1679         else {
1680                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
1681                 res = tmplen;
1682         }
1683         wpabuf_free(tmp);
1684
1685         return res;
1686 }
1687
1688
1689 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
1690 {
1691         struct wpabuf *p2p_ie;
1692         int ret;
1693
1694         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
1695         if (p2p_ie == NULL)
1696                 return 0;
1697
1698         ret = p2p_attr_text(p2p_ie, buf, end);
1699         wpabuf_free(p2p_ie);
1700         return ret;
1701 }
1702
1703
1704 static void p2p_clear_go_neg(struct p2p_data *p2p)
1705 {
1706         p2p->go_neg_peer = NULL;
1707         p2p_clear_timeout(p2p);
1708         p2p_set_state(p2p, P2P_IDLE);
1709 }
1710
1711
1712 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
1713 {
1714         if (p2p->go_neg_peer == NULL) {
1715                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1716                         "P2P: No pending Group Formation - "
1717                         "ignore WPS registration success notification");
1718                 return; /* No pending Group Formation */
1719         }
1720
1721         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
1722             0) {
1723                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1724                         "P2P: Ignore WPS registration success notification "
1725                         "for " MACSTR " (GO Negotiation peer " MACSTR ")",
1726                         MAC2STR(mac_addr),
1727                         MAC2STR(p2p->go_neg_peer->intended_addr));
1728                 return; /* Ignore unexpected peer address */
1729         }
1730
1731         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1732                 "P2P: Group Formation completed successfully with " MACSTR,
1733                 MAC2STR(mac_addr));
1734
1735         p2p_clear_go_neg(p2p);
1736 }
1737
1738
1739 void p2p_group_formation_failed(struct p2p_data *p2p)
1740 {
1741         if (p2p->go_neg_peer == NULL) {
1742                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1743                         "P2P: No pending Group Formation - "
1744                         "ignore group formation failure notification");
1745                 return; /* No pending Group Formation */
1746         }
1747
1748         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1749                 "P2P: Group Formation failed with " MACSTR,
1750                 MAC2STR(p2p->go_neg_peer->intended_addr));
1751
1752         p2p_clear_go_neg(p2p);
1753 }
1754
1755
1756 struct p2p_data * p2p_init(const struct p2p_config *cfg)
1757 {
1758         struct p2p_data *p2p;
1759
1760         if (cfg->max_peers < 1)
1761                 return NULL;
1762
1763         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
1764         if (p2p == NULL)
1765                 return NULL;
1766         p2p->cfg = (struct p2p_config *) (p2p + 1);
1767         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
1768         if (cfg->dev_name)
1769                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
1770
1771         p2p->min_disc_int = 1;
1772         p2p->max_disc_int = 3;
1773
1774         os_get_random(&p2p->next_tie_breaker, 1);
1775         p2p->next_tie_breaker &= 0x01;
1776         if (cfg->sd_request)
1777                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
1778         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
1779         if (cfg->concurrent_operations)
1780                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
1781         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
1782
1783         dl_list_init(&p2p->devices);
1784
1785         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
1786                                p2p_expiration_timeout, p2p, NULL);
1787
1788         return p2p;
1789 }
1790
1791
1792 void p2p_deinit(struct p2p_data *p2p)
1793 {
1794         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
1795         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
1796         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1797         p2p_flush(p2p);
1798         os_free(p2p->cfg->dev_name);
1799         os_free(p2p->groups);
1800         wpabuf_free(p2p->sd_resp);
1801         os_free(p2p);
1802 }
1803
1804
1805 void p2p_flush(struct p2p_data *p2p)
1806 {
1807         struct p2p_device *dev, *prev;
1808         p2p_clear_timeout(p2p);
1809         p2p_set_state(p2p, P2P_IDLE);
1810         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1811         p2p->go_neg_peer = NULL;
1812         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1813         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
1814                               list) {
1815                 dl_list_del(&dev->list);
1816                 p2p_device_free(p2p, dev);
1817         }
1818         p2p_free_sd_queries(p2p);
1819 }
1820
1821
1822 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
1823 {
1824         os_free(p2p->cfg->dev_name);
1825         if (dev_name) {
1826                 p2p->cfg->dev_name = os_strdup(dev_name);
1827                 if (p2p->cfg->dev_name == NULL)
1828                         return -1;
1829         } else
1830                 p2p->cfg->dev_name = NULL;
1831         return 0;
1832 }
1833
1834
1835 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
1836 {
1837         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
1838         return 0;
1839 }
1840
1841
1842 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
1843                           size_t num_dev_types)
1844 {
1845         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
1846                 num_dev_types = P2P_SEC_DEVICE_TYPES;
1847         p2p->cfg->num_sec_dev_types = num_dev_types;
1848         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
1849         return 0;
1850 }
1851
1852
1853 int p2p_set_country(struct p2p_data *p2p, const char *country)
1854 {
1855         os_memcpy(p2p->cfg->country, country, 3);
1856         return 0;
1857 }
1858
1859
1860 void p2p_continue_find(struct p2p_data *p2p)
1861 {
1862         struct p2p_device *dev;
1863         p2p_set_state(p2p, P2P_SEARCH);
1864         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
1865                 if (dev->flags & P2P_DEV_SD_SCHEDULE) {
1866                         if (p2p_start_sd(p2p, dev) == 0)
1867                                 return;
1868                         else
1869                                 break;
1870                 } else if (dev->req_config_methods) {
1871                         if (p2p_send_prov_disc_req(p2p, dev, 0) == 0)
1872                                 return;
1873                 }
1874         }
1875
1876         p2p_listen_in_find(p2p);
1877 }
1878
1879
1880 static void p2p_sd_cb(struct p2p_data *p2p, int success)
1881 {
1882         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1883                 "P2P: Service Discovery Query TX callback: success=%d",
1884                 success);
1885         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
1886
1887         if (!success) {
1888                 if (p2p->sd_peer) {
1889                         p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
1890                         p2p->sd_peer = NULL;
1891                 }
1892                 p2p_continue_find(p2p);
1893                 return;
1894         }
1895
1896         if (p2p->sd_peer == NULL) {
1897                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1898                         "P2P: No SD peer entry known");
1899                 p2p_continue_find(p2p);
1900                 return;
1901         }
1902
1903         /* Wait for response from the peer */
1904         p2p_set_state(p2p, P2P_SD_DURING_FIND);
1905         p2p_set_timeout(p2p, 0, 200000);
1906 }
1907
1908
1909 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
1910 {
1911         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1912                 "P2P: Provision Discovery Request TX callback: success=%d",
1913                 success);
1914         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
1915
1916         if (!success) {
1917                 if (p2p->state != P2P_IDLE)
1918                         p2p_continue_find(p2p);
1919                 return;
1920         }
1921
1922         /* Wait for response from the peer */
1923         if (p2p->state == P2P_SEARCH)
1924                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
1925         p2p_set_timeout(p2p, 0, 200000);
1926 }
1927
1928
1929 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
1930                          int level, const u8 *ies, size_t ies_len)
1931 {
1932         p2p_add_device(p2p, bssid, freq, level, ies, ies_len);
1933
1934         if (p2p->go_neg_peer && p2p->state == P2P_SEARCH &&
1935             os_memcmp(p2p->go_neg_peer->p2p_device_addr, bssid, ETH_ALEN) == 0)
1936         {
1937                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1938                         "P2P: Found GO Negotiation peer - try to start GO "
1939                         "negotiation");
1940                 p2p_connect_send(p2p, p2p->go_neg_peer);
1941                 return 1;
1942         }
1943
1944         return 0;
1945 }
1946
1947
1948 void p2p_scan_res_handled(struct p2p_data *p2p)
1949 {
1950         if (!p2p->p2p_scan_running) {
1951                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan was not "
1952                         "running, but scan results received");
1953         }
1954         p2p->p2p_scan_running = 0;
1955         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1956
1957         if (p2p_run_after_scan(p2p))
1958                 return;
1959         if (p2p->state == P2P_SEARCH)
1960                 p2p_continue_find(p2p);
1961 }
1962
1963
1964 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies)
1965 {
1966         u8 *len = p2p_buf_add_ie_hdr(ies);
1967         p2p_buf_add_capability(ies, p2p->dev_capab, 0);
1968         if (p2p->cfg->reg_class && p2p->cfg->channel)
1969                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
1970                                            p2p->cfg->reg_class,
1971                                            p2p->cfg->channel);
1972         if (p2p->ext_listen_interval)
1973                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
1974                                               p2p->ext_listen_interval);
1975         /* TODO: p2p_buf_add_operating_channel() if GO */
1976         p2p_buf_update_ie_hdr(ies, len);
1977 }
1978
1979
1980 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
1981 {
1982         return p2p_attr_text(p2p_ie, buf, end);
1983 }
1984
1985
1986 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
1987 {
1988         struct p2p_device *dev = p2p->go_neg_peer;
1989
1990         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1991                 "P2P: GO Negotiation Request TX callback: success=%d",
1992                 success);
1993
1994         if (dev == NULL) {
1995                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1996                         "P2P: No pending GO Negotiation");
1997                 return;
1998         }
1999
2000         if (success) {
2001                 dev->go_neg_req_sent++;
2002                 if (dev->flags & P2P_DEV_USER_REJECTED) {
2003                         p2p_set_state(p2p, P2P_IDLE);
2004                         return;
2005                 }
2006         }
2007
2008         if (!success &&
2009             (dev->dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2010             !is_zero_ether_addr(dev->member_in_go_dev)) {
2011                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2012                         "P2P: Peer " MACSTR " did not acknowledge request - "
2013                         "try to use device discoverability through its GO",
2014                         MAC2STR(dev->p2p_device_addr));
2015                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2016                 p2p_send_dev_disc_req(p2p, dev);
2017                 return;
2018         }
2019
2020         /*
2021          * Use P2P find, if needed, to find the other device from its listen
2022          * channel.
2023          */
2024         p2p_set_state(p2p, P2P_CONNECT);
2025         p2p_set_timeout(p2p, 0, 100000);
2026 }
2027
2028
2029 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
2030 {
2031         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2032                 "P2P: GO Negotiation Response TX callback: success=%d",
2033                 success);
2034         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
2035                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2036                         "P2P: Ignore TX callback event - GO Negotiation is "
2037                         "not running anymore");
2038                 return;
2039         }
2040         p2p_set_state(p2p, P2P_CONNECT);
2041         p2p_set_timeout(p2p, 0, 100000);
2042 }
2043
2044
2045 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success)
2046 {
2047         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2048                 "P2P: GO Negotiation Response (failure) TX callback: "
2049                 "success=%d", success);
2050 }
2051
2052
2053 static void p2p_go_neg_conf_cb(struct p2p_data *p2p, int success)
2054 {
2055         struct p2p_device *dev;
2056
2057         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2058                 "P2P: GO Negotiation Confirm TX callback: success=%d",
2059                 success);
2060         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2061         if (!success) {
2062                 /*
2063                  * It looks like the TX status for GO Negotiation Confirm is
2064                  * often showing failure even when the peer has actually
2065                  * received the frame. Since the peer may change channels
2066                  * immediately after having received the frame, we may not see
2067                  * an Ack for retries, so just dropping a single frame may
2068                  * trigger this. To allow the group formation to succeed if the
2069                  * peer did indeed receive the frame, continue regardless of
2070                  * the TX status.
2071                  */
2072                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2073                         "P2P: Assume GO Negotiation Confirm TX was actually "
2074                         "received by the peer even though Ack was not "
2075                         "reported");
2076         }
2077
2078         dev = p2p->go_neg_peer;
2079         if (dev == NULL)
2080                 return;
2081
2082         p2p_go_complete(p2p, dev);
2083 }
2084
2085
2086 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
2087                         const u8 *src, const u8 *bssid, int success)
2088 {
2089         enum p2p_pending_action_state state;
2090
2091         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2092                 "P2P: Action frame TX callback (state=%d freq=%u dst=" MACSTR
2093                 " src=" MACSTR " bssid=" MACSTR " success=%d",
2094                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
2095                 MAC2STR(bssid), success);
2096         state = p2p->pending_action_state;
2097         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2098         switch (state) {
2099         case P2P_NO_PENDING_ACTION:
2100                 break;
2101         case P2P_PENDING_GO_NEG_REQUEST:
2102                 p2p_go_neg_req_cb(p2p, success);
2103                 break;
2104         case P2P_PENDING_GO_NEG_RESPONSE:
2105                 p2p_go_neg_resp_cb(p2p, success);
2106                 break;
2107         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
2108                 p2p_go_neg_resp_failure_cb(p2p, success);
2109                 break;
2110         case P2P_PENDING_GO_NEG_CONFIRM:
2111                 p2p_go_neg_conf_cb(p2p, success);
2112                 break;
2113         case P2P_PENDING_SD:
2114                 p2p_sd_cb(p2p, success);
2115                 break;
2116         case P2P_PENDING_PD:
2117                 p2p_prov_disc_cb(p2p, success);
2118                 break;
2119         case P2P_PENDING_INVITATION_REQUEST:
2120                 p2p_invitation_req_cb(p2p, success);
2121                 break;
2122         case P2P_PENDING_INVITATION_RESPONSE:
2123                 p2p_invitation_resp_cb(p2p, success);
2124                 break;
2125         case P2P_PENDING_DEV_DISC_REQUEST:
2126                 p2p_dev_disc_req_cb(p2p, success);
2127                 break;
2128         case P2P_PENDING_DEV_DISC_RESPONSE:
2129                 p2p_dev_disc_resp_cb(p2p, success);
2130                 break;
2131         case P2P_PENDING_GO_DISC_REQ:
2132                 p2p_go_disc_req_cb(p2p, success);
2133                 break;
2134         }
2135 }
2136
2137
2138 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
2139                    unsigned int duration)
2140 {
2141         if (freq == p2p->pending_client_disc_freq) {
2142                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2143                         "P2P: Client discoverability remain-awake completed");
2144                 p2p->pending_client_disc_freq = 0;
2145                 return;
2146         }
2147
2148         if (freq != p2p->pending_listen_freq) {
2149                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2150                         "P2P: Unexpected listen callback for freq=%u "
2151                         "duration=%u (pending_listen_freq=%u)",
2152                         freq, duration, p2p->pending_listen_freq);
2153                 return;
2154         }
2155
2156         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2157                 "P2P: Starting Listen timeout(%u,%u) on freq=%u based on "
2158                 "callback",
2159                 p2p->pending_listen_sec, p2p->pending_listen_usec,
2160                 p2p->pending_listen_freq);
2161         p2p->in_listen = 1;
2162         p2p->drv_in_listen = 1;
2163         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
2164                 /*
2165                  * Add 20 msec extra wait to avoid race condition with driver
2166                  * remain-on-channel end event, i.e., give driver more time to
2167                  * complete the operation before our timeout expires.
2168                  */
2169                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
2170                                 p2p->pending_listen_usec + 20000);
2171         }
2172
2173         p2p->pending_listen_freq = 0;
2174 }
2175
2176
2177 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
2178 {
2179         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver ended Listen "
2180                 "state (freq=%u)", freq);
2181         p2p->drv_in_listen = 0;
2182         if (p2p->in_listen)
2183                 return 0; /* Internal timeout will trigger the next step */
2184
2185         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
2186                 p2p_set_state(p2p, P2P_CONNECT);
2187                 p2p_connect_send(p2p, p2p->go_neg_peer);
2188                 return 1;
2189         } else if (p2p->state == P2P_SEARCH) {
2190                 p2p_search(p2p);
2191                 return 1;
2192         }
2193
2194         return 0;
2195 }
2196
2197
2198 static void p2p_timeout_connect(struct p2p_data *p2p)
2199 {
2200         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2201         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
2202         p2p_listen_in_find(p2p);
2203 }
2204
2205
2206 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
2207 {
2208         if (p2p->go_neg_peer) {
2209                 if (p2p->drv_in_listen) {
2210                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is "
2211                                 "still in Listen state; wait for it to "
2212                                 "complete");
2213                         return;
2214                 }
2215                 p2p_set_state(p2p, P2P_CONNECT);
2216                 p2p_connect_send(p2p, p2p->go_neg_peer);
2217         } else
2218                 p2p_set_state(p2p, P2P_IDLE);
2219 }
2220
2221
2222 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
2223 {
2224         /*
2225          * TODO: could remain constantly in Listen state for some time if there
2226          * are no other concurrent uses for the radio. For now, go to listen
2227          * state once per second to give other uses a chance to use the radio.
2228          */
2229         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
2230         p2p_set_timeout(p2p, 1, 0);
2231 }
2232
2233
2234 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
2235 {
2236         struct p2p_device *dev = p2p->go_neg_peer;
2237
2238         if (dev == NULL) {
2239                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2240                         "P2P: Unknown GO Neg peer - stop GO Neg wait");
2241                 return;
2242         }
2243
2244         dev->wait_count++;
2245         if (dev->wait_count >= 120) {
2246                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2247                         "P2P: Timeout on waiting peer to become ready for GO "
2248                         "Negotiation");
2249                 p2p_go_neg_failed(p2p, dev, -1);
2250                 return;
2251         }
2252
2253         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2254                 "P2P: Go to Listen state while waiting for the peer to become "
2255                 "ready for GO Negotiation");
2256         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
2257         p2p_listen_in_find(p2p);
2258 }
2259
2260
2261 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
2262 {
2263         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2264                 "P2P: Service Discovery Query timeout");
2265         if (p2p->sd_peer) {
2266                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2267                 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
2268                 p2p->sd_peer = NULL;
2269         }
2270         p2p_continue_find(p2p);
2271 }
2272
2273
2274 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
2275 {
2276         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2277                 "P2P: Provision Discovery Request timeout");
2278         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2279         p2p_continue_find(p2p);
2280 }
2281
2282
2283 static void p2p_timeout_invite(struct p2p_data *p2p)
2284 {
2285         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2286         p2p_set_state(p2p, P2P_INVITE_LISTEN);
2287         p2p_listen_in_find(p2p);
2288 }
2289
2290
2291 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
2292 {
2293         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
2294                 p2p_set_state(p2p, P2P_INVITE);
2295                 p2p_invite_send(p2p, p2p->invite_peer,
2296                                 p2p->invite_go_dev_addr);
2297         } else {
2298                 if (p2p->invite_peer) {
2299                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2300                                 "P2P: Invitation Request retry limit reached");
2301                         if (p2p->cfg->invitation_result)
2302                                 p2p->cfg->invitation_result(
2303                                         p2p->cfg->cb_ctx, -1, NULL);
2304                 }
2305                 p2p_set_state(p2p, P2P_IDLE);
2306         }
2307 }
2308
2309
2310 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
2311 {
2312         struct p2p_data *p2p = eloop_ctx;
2313
2314         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Timeout (state=%s)",
2315                 p2p_state_txt(p2p->state));
2316
2317         p2p->in_listen = 0;
2318
2319         switch (p2p->state) {
2320         case P2P_IDLE:
2321                 break;
2322         case P2P_SEARCH:
2323                 p2p_search(p2p);
2324                 break;
2325         case P2P_CONNECT:
2326                 p2p_timeout_connect(p2p);
2327                 break;
2328         case P2P_CONNECT_LISTEN:
2329                 p2p_timeout_connect_listen(p2p);
2330                 break;
2331         case P2P_GO_NEG:
2332                 break;
2333         case P2P_LISTEN_ONLY:
2334                 if (p2p->ext_listen_only) {
2335                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2336                                 "P2P: Extended Listen Timing - Listen State "
2337                                 "completed");
2338                         p2p->ext_listen_only = 0;
2339                         p2p_set_state(p2p, P2P_IDLE);
2340                 }
2341                 break;
2342         case P2P_WAIT_PEER_CONNECT:
2343                 p2p_timeout_wait_peer_connect(p2p);
2344                 break;
2345         case P2P_WAIT_PEER_IDLE:
2346                 p2p_timeout_wait_peer_idle(p2p);
2347                 break;
2348         case P2P_SD_DURING_FIND:
2349                 p2p_timeout_sd_during_find(p2p);
2350                 break;
2351         case P2P_PROVISIONING:
2352                 break;
2353         case P2P_PD_DURING_FIND:
2354                 p2p_timeout_prov_disc_during_find(p2p);
2355                 break;
2356         case P2P_INVITE:
2357                 p2p_timeout_invite(p2p);
2358                 break;
2359         case P2P_INVITE_LISTEN:
2360                 p2p_timeout_invite_listen(p2p);
2361                 break;
2362         }
2363 }
2364
2365
2366 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
2367 {
2368         struct p2p_device *dev;
2369
2370         dev = p2p_get_device(p2p, peer_addr);
2371         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Local request to reject "
2372                 "connection attempts by peer " MACSTR, MAC2STR(peer_addr));
2373         if (dev == NULL) {
2374                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
2375                         " unknown", MAC2STR(peer_addr));
2376                 return -1;
2377         }
2378         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
2379         dev->flags |= P2P_DEV_USER_REJECTED;
2380         return 0;
2381 }
2382
2383
2384 static const char * p2p_wps_method_text(enum p2p_wps_method method)
2385 {
2386         switch (method) {
2387         case WPS_NOT_READY:
2388                 return "not-ready";
2389         case WPS_PIN_LABEL:
2390                 return "Label";
2391         case WPS_PIN_DISPLAY:
2392                 return "Display";
2393         case WPS_PIN_KEYPAD:
2394                 return "Keypad";
2395         case WPS_PBC:
2396                 return "PBC";
2397         }
2398
2399         return "??";
2400 }
2401
2402
2403 static const char * p2p_go_state_text(enum p2p_go_state go_state)
2404 {
2405         switch (go_state) {
2406         case UNKNOWN_GO:
2407                 return "unknown";
2408         case LOCAL_GO:
2409                 return "local";
2410         case  REMOTE_GO:
2411                 return "remote";
2412         }
2413
2414         return "??";
2415 }
2416
2417
2418 int p2p_get_peer_info(struct p2p_data *p2p, const u8 *addr, int next,
2419                       char *buf, size_t buflen)
2420 {
2421         struct p2p_device *dev;
2422         int res;
2423         char *pos, *end;
2424         struct os_time now;
2425         char devtype[WPS_DEV_TYPE_BUFSIZE];
2426
2427         if (addr)
2428                 dev = p2p_get_device(p2p, addr);
2429         else
2430                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
2431
2432         if (dev && next) {
2433                 dev = dl_list_first(&dev->list, struct p2p_device, list);
2434                 if (&dev->list == &p2p->devices)
2435                         dev = NULL;
2436         }
2437
2438         if (dev == NULL)
2439                 return -1;
2440
2441         pos = buf;
2442         end = buf + buflen;
2443
2444         res = os_snprintf(pos, end - pos, MACSTR "\n",
2445                           MAC2STR(dev->p2p_device_addr));
2446         if (res < 0 || res >= end - pos)
2447                 return pos - buf;
2448         pos += res;
2449
2450         os_get_time(&now);
2451         res = os_snprintf(pos, end - pos,
2452                           "age=%d\n"
2453                           "listen_freq=%d\n"
2454                           "level=%d\n"
2455                           "wps_method=%s\n"
2456                           "interface_addr=" MACSTR "\n"
2457                           "member_in_go_dev=" MACSTR "\n"
2458                           "member_in_go_iface=" MACSTR "\n"
2459                           "pri_dev_type=%s\n"
2460                           "device_name=%s\n"
2461                           "config_methods=0x%x\n"
2462                           "dev_capab=0x%x\n"
2463                           "group_capab=0x%x\n"
2464                           "go_neg_req_sent=%d\n"
2465                           "go_state=%s\n"
2466                           "dialog_token=%u\n"
2467                           "intended_addr=" MACSTR "\n"
2468                           "country=%c%c\n"
2469                           "oper_freq=%d\n"
2470                           "req_config_methods=0x%x\n"
2471                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
2472                           "status=%d\n"
2473                           "wait_count=%u\n"
2474                           "invitation_reqs=%u\n",
2475                           (int) (now.sec - dev->last_seen.sec),
2476                           dev->listen_freq,
2477                           dev->level,
2478                           p2p_wps_method_text(dev->wps_method),
2479                           MAC2STR(dev->interface_addr),
2480                           MAC2STR(dev->member_in_go_dev),
2481                           MAC2STR(dev->member_in_go_iface),
2482                           wps_dev_type_bin2str(dev->pri_dev_type,
2483                                                devtype, sizeof(devtype)),
2484                           dev->device_name,
2485                           dev->config_methods,
2486                           dev->dev_capab,
2487                           dev->group_capab,
2488                           dev->go_neg_req_sent,
2489                           p2p_go_state_text(dev->go_state),
2490                           dev->dialog_token,
2491                           MAC2STR(dev->intended_addr),
2492                           dev->country[0] ? dev->country[0] : '_',
2493                           dev->country[1] ? dev->country[1] : '_',
2494                           dev->oper_freq,
2495                           dev->req_config_methods,
2496                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
2497                           "[PROBE_REQ_ONLY]" : "",
2498                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
2499                           dev->flags & P2P_DEV_NOT_YET_READY ?
2500                           "[NOT_YET_READY]" : "",
2501                           dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "",
2502                           dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" :
2503                           "",
2504                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
2505                           "[PD_PEER_DISPLAY]" : "",
2506                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
2507                           "[PD_PEER_KEYPAD]" : "",
2508                           dev->flags & P2P_DEV_USER_REJECTED ?
2509                           "[USER_REJECTED]" : "",
2510                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
2511                           "[PEER_WAITING_RESPONSE]" : "",
2512                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
2513                           "[PREFER_PERSISTENT_GROUP]" : "",
2514                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
2515                           "[WAIT_GO_NEG_RESPONSE]" : "",
2516                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
2517                           "[WAIT_GO_NEG_CONFIRM]" : "",
2518                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
2519                           "[GROUP_CLIENT_ONLY]" : "",
2520                           dev->flags & P2P_DEV_FORCE_FREQ ?
2521                           "[FORCE_FREQ" : "",
2522                           dev->status,
2523                           dev->wait_count,
2524                           dev->invitation_reqs);
2525         if (res < 0 || res >= end - pos)
2526                 return pos - buf;
2527         pos += res;
2528
2529         if (dev->ext_listen_period) {
2530                 res = os_snprintf(pos, end - pos,
2531                                   "ext_listen_period=%u\n"
2532                                   "ext_listen_interval=%u\n",
2533                                   dev->ext_listen_period,
2534                                   dev->ext_listen_interval);
2535                 if (res < 0 || res >= end - pos)
2536                         return pos - buf;
2537                 pos += res;
2538         }
2539
2540         if (dev->oper_ssid_len) {
2541                 res = os_snprintf(pos, end - pos,
2542                                   "oper_ssid=%s\n",
2543                                   wpa_ssid_txt(dev->oper_ssid,
2544                                                dev->oper_ssid_len));
2545                 if (res < 0 || res >= end - pos)
2546                         return pos - buf;
2547                 pos += res;
2548         }
2549
2550         return pos - buf;
2551 }
2552
2553
2554 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
2555 {
2556         if (enabled) {
2557                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client "
2558                         "discoverability enabled");
2559                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2560         } else {
2561                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client "
2562                         "discoverability disabled");
2563                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2564         }
2565 }
2566
2567
2568 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
2569                                               u32 duration2, u32 interval2)
2570 {
2571         struct wpabuf *req;
2572         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
2573         u8 *len;
2574
2575         req = wpabuf_alloc(100);
2576         if (req == NULL)
2577                 return NULL;
2578
2579         if (duration1 || interval1) {
2580                 os_memset(&desc1, 0, sizeof(desc1));
2581                 desc1.count_type = 1;
2582                 desc1.duration = duration1;
2583                 desc1.interval = interval1;
2584                 ptr1 = &desc1;
2585
2586                 if (duration2 || interval2) {
2587                         os_memset(&desc2, 0, sizeof(desc2));
2588                         desc2.count_type = 2;
2589                         desc2.duration = duration2;
2590                         desc2.interval = interval2;
2591                         ptr2 = &desc2;
2592                 }
2593         }
2594
2595         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
2596         len = p2p_buf_add_ie_hdr(req);
2597         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
2598         p2p_buf_update_ie_hdr(req, len);
2599
2600         return req;
2601 }
2602
2603
2604 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
2605                      const u8 *own_interface_addr, unsigned int freq,
2606                      u32 duration1, u32 interval1, u32 duration2,
2607                      u32 interval2)
2608 {
2609         struct wpabuf *req;
2610
2611         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send Presence Request to "
2612                 "GO " MACSTR " (own interface " MACSTR ") freq=%u dur1=%u "
2613                 "int1=%u dur2=%u int2=%u",
2614                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
2615                 freq, duration1, interval1, duration2, interval2);
2616
2617         req = p2p_build_presence_req(duration1, interval1, duration2,
2618                                      interval2);
2619         if (req == NULL)
2620                 return -1;
2621
2622         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2623         if (p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, go_interface_addr,
2624                                   own_interface_addr,
2625                                   go_interface_addr,
2626                                   wpabuf_head(req), wpabuf_len(req), 200) < 0)
2627         {
2628                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2629                         "P2P: Failed to send Action frame");
2630         }
2631         wpabuf_free(req);
2632
2633         return 0;
2634 }
2635
2636
2637 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
2638                                                size_t noa_len, u8 dialog_token)
2639 {
2640         struct wpabuf *resp;
2641         u8 *len;
2642
2643         resp = wpabuf_alloc(100 + noa_len);
2644         if (resp == NULL)
2645                 return NULL;
2646
2647         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
2648         len = p2p_buf_add_ie_hdr(resp);
2649         p2p_buf_add_status(resp, status);
2650         if (noa) {
2651                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
2652                 wpabuf_put_le16(resp, noa_len);
2653                 wpabuf_put_data(resp, noa, noa_len);
2654         } else
2655                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
2656         p2p_buf_update_ie_hdr(resp, len);
2657
2658         return resp;
2659 }
2660
2661
2662 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
2663                                      const u8 *sa, const u8 *data, size_t len,
2664                                      int rx_freq)
2665 {
2666         struct p2p_message msg;
2667         u8 status;
2668         struct wpabuf *resp;
2669         size_t g;
2670         struct p2p_group *group = NULL;
2671         int parsed = 0;
2672         u8 noa[50];
2673         int noa_len;
2674
2675         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2676                 "P2P: Received P2P Action - P2P Presence Request");
2677
2678         for (g = 0; g < p2p->num_groups; g++) {
2679                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
2680                               ETH_ALEN) == 0) {
2681                         group = p2p->groups[g];
2682                         break;
2683                 }
2684         }
2685         if (group == NULL) {
2686                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2687                         "P2P: Ignore P2P Presence Request for unknown group "
2688                         MACSTR, MAC2STR(da));
2689                 return;
2690         }
2691
2692         if (p2p_parse(data, len, &msg) < 0) {
2693                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2694                         "P2P: Failed to parse P2P Presence Request");
2695                 status = P2P_SC_FAIL_INVALID_PARAMS;
2696                 goto fail;
2697         }
2698         parsed = 1;
2699
2700         if (msg.noa == NULL) {
2701                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2702                         "P2P: No NoA attribute in P2P Presence Request");
2703                 status = P2P_SC_FAIL_INVALID_PARAMS;
2704                 goto fail;
2705         }
2706
2707         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
2708
2709 fail:
2710         if (p2p->cfg->get_noa)
2711                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
2712                                             sizeof(noa));
2713         else
2714                 noa_len = -1;
2715         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
2716                                        noa_len > 0 ? noa_len : 0,
2717                                        msg.dialog_token);
2718         if (parsed)
2719                 p2p_parse_free(&msg);
2720         if (resp == NULL)
2721                 return;
2722
2723         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2724         if (p2p->cfg->send_action(p2p->cfg->cb_ctx, rx_freq, sa, da, da,
2725                                   wpabuf_head(resp), wpabuf_len(resp), 200) <
2726             0) {
2727                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2728                         "P2P: Failed to send Action frame");
2729         }
2730         wpabuf_free(resp);
2731 }
2732
2733
2734 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
2735                                       const u8 *sa, const u8 *data, size_t len)
2736 {
2737         struct p2p_message msg;
2738
2739         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2740                 "P2P: Received P2P Action - P2P Presence Response");
2741
2742         if (p2p_parse(data, len, &msg) < 0) {
2743                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2744                         "P2P: Failed to parse P2P Presence Response");
2745                 return;
2746         }
2747
2748         if (msg.status == NULL || msg.noa == NULL) {
2749                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2750                         "P2P: No Status or NoA attribute in P2P Presence "
2751                         "Response");
2752                 p2p_parse_free(&msg);
2753                 return;
2754         }
2755
2756         if (*msg.status) {
2757                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2758                         "P2P: P2P Presence Request was rejected: status %u",
2759                         *msg.status);
2760                 p2p_parse_free(&msg);
2761                 return;
2762         }
2763
2764         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2765                 "P2P: P2P Presence Request was accepted");
2766         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
2767                     msg.noa, msg.noa_len);
2768         /* TODO: process NoA */
2769         p2p_parse_free(&msg);
2770 }
2771
2772
2773 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
2774 {
2775         struct p2p_data *p2p = eloop_ctx;
2776
2777         if (p2p->ext_listen_interval) {
2778                 /* Schedule next extended listen timeout */
2779                 eloop_register_timeout(p2p->ext_listen_interval_sec,
2780                                        p2p->ext_listen_interval_usec,
2781                                        p2p_ext_listen_timeout, p2p, NULL);
2782         }
2783
2784         if (p2p->state != P2P_IDLE) {
2785                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip Extended "
2786                         "Listen timeout in active state (%s)",
2787                         p2p_state_txt(p2p->state));
2788                 return;
2789         }
2790
2791         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Extended Listen timeout");
2792         p2p->ext_listen_only = 1;
2793         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
2794                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start "
2795                         "Listen state for Extended Listen Timing");
2796                 p2p->ext_listen_only = 0;
2797         }
2798 }
2799
2800
2801 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
2802                    unsigned int interval)
2803 {
2804         if (period > 65535 || interval > 65535 || period > interval ||
2805             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
2806                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2807                         "P2P: Invalid Extended Listen Timing request: "
2808                         "period=%u interval=%u", period, interval);
2809                 return -1;
2810         }
2811
2812         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2813
2814         if (interval == 0) {
2815                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2816                         "P2P: Disabling Extended Listen Timing");
2817                 p2p->ext_listen_period = 0;
2818                 p2p->ext_listen_interval = 0;
2819                 return 0;
2820         }
2821
2822         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2823                 "P2P: Enabling Extended Listen Timing: period %u msec, "
2824                 "interval %u msec", period, interval);
2825         p2p->ext_listen_period = period;
2826         p2p->ext_listen_interval = interval;
2827         p2p->ext_listen_interval_sec = interval / 1000;
2828         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
2829
2830         eloop_register_timeout(p2p->ext_listen_interval_sec,
2831                                p2p->ext_listen_interval_usec,
2832                                p2p_ext_listen_timeout, p2p, NULL);
2833
2834         return 0;
2835 }
2836
2837
2838 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
2839                       const u8 *ie, size_t ie_len)
2840 {
2841         struct p2p_message msg;
2842
2843         if (bssid == NULL || ie == NULL)
2844                 return;
2845
2846         os_memset(&msg, 0, sizeof(msg));
2847         if (p2p_parse_ies(ie, ie_len, &msg))
2848                 return;
2849         if (msg.minor_reason_code == NULL)
2850                 return;
2851
2852         wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
2853                 "P2P: Deauthentication notification BSSID " MACSTR
2854                 " reason_code=%u minor_reason_code=%u",
2855                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
2856
2857         p2p_parse_free(&msg);
2858 }
2859
2860
2861 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
2862                         const u8 *ie, size_t ie_len)
2863 {
2864         struct p2p_message msg;
2865
2866         if (bssid == NULL || ie == NULL)
2867                 return;
2868
2869         os_memset(&msg, 0, sizeof(msg));
2870         if (p2p_parse_ies(ie, ie_len, &msg))
2871                 return;
2872         if (msg.minor_reason_code == NULL)
2873                 return;
2874
2875         wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
2876                 "P2P: Disassociation notification BSSID " MACSTR
2877                 " reason_code=%u minor_reason_code=%u",
2878                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
2879
2880         p2p_parse_free(&msg);
2881 }
2882
2883
2884 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
2885 {
2886         if (enabled) {
2887                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P "
2888                         "Device operations enabled");
2889                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
2890         } else {
2891                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P "
2892                         "Device operations disabled");
2893                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
2894         }
2895 }
2896
2897
2898 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
2899 {
2900         if (p2p_channel_to_freq(p2p->cfg->country, reg_class, channel) < 0)
2901                 return -1;
2902
2903         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Set Listen channel: "
2904                 "reg_class %u channel %u", reg_class, channel);
2905         p2p->cfg->reg_class = reg_class;
2906         p2p->cfg->channel = channel;
2907
2908         return 0;
2909 }
2910
2911
2912 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
2913 {
2914         wpa_hexdump_ascii(MSG_DEBUG, "P2P: New SSID postfix", postfix, len);
2915         if (postfix == NULL) {
2916                 p2p->cfg->ssid_postfix_len = 0;
2917                 return 0;
2918         }
2919         if (len > sizeof(p2p->cfg->ssid_postfix))
2920                 return -1;
2921         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
2922         p2p->cfg->ssid_postfix_len = len;
2923         return 0;
2924 }
2925
2926
2927 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
2928                            u8 *iface_addr)
2929 {
2930         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
2931         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
2932                 return -1;
2933         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
2934         return 0;
2935 }
2936
2937
2938 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
2939 {
2940         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
2941         if (is_zero_ether_addr(p2p->peer_filter))
2942                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Disable peer "
2943                         "filter");
2944         else
2945                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Enable peer "
2946                         "filter for " MACSTR, MAC2STR(p2p->peer_filter));
2947 }