src/ap/beacon.c

   1 /*
   2  * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
   3  * Copyright (c) 2002-2004, Instant802 Networks, Inc.
   4  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   5  * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
   6  *
   7  * This software may be distributed under the terms of the BSD license.
   8  * See README for more details.
   9  */
  10
  11 #include "utils/includes.h"
  12
  13 #ifndef CONFIG_NATIVE_WINDOWS
  14
  15 #include "utils/common.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "common/ieee802_11_common.h"
  18 #include "common/hw_features_common.h"
  19 #include "wps/wps_defs.h"
  20 #include "p2p/p2p.h"
  21 #include "hostapd.h"
  22 #include "ieee802_11.h"
  23 #include "wpa_auth.h"
  24 #include "wmm.h"
  25 #include "ap_config.h"
  26 #include "sta_info.h"
  27 #include "p2p_hostapd.h"
  28 #include "ap_drv_ops.h"
  29 #include "beacon.h"
  30 #include "hs20.h"
  31 #include "dfs.h"
  32
  33
  34 #ifdef NEED_AP_MLME
  35
  36 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
  37                                          size_t len)
  38 {
  39         if (!hapd->conf->radio_measurements || len < 2 + 4)
  40                 return eid;
  41
  42         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  43         *eid++ = 5;
  44         *eid++ = (hapd->conf->radio_measurements & BIT(0)) ?
  45                 WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00;
  46         *eid++ = 0x00;
  47         *eid++ = 0x00;
  48         *eid++ = 0x00;
  49         *eid++ = 0x00;
  50         return eid;
  51 }
  52
  53
  54 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  55 {
  56         if (len < 2 + 5)
  57                 return eid;
  58
  59 #ifdef CONFIG_TESTING_OPTIONS
  60         if (hapd->conf->bss_load_test_set) {
  61                 *eid++ = WLAN_EID_BSS_LOAD;
  62                 *eid++ = 5;
  63                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  64                 eid += 5;
  65                 return eid;
  66         }
  67 #endif /* CONFIG_TESTING_OPTIONS */
  68         if (hapd->conf->bss_load_update_period) {
  69                 *eid++ = WLAN_EID_BSS_LOAD;
  70                 *eid++ = 5;
  71                 WPA_PUT_LE16(eid, hapd->num_sta);
  72                 eid += 2;
  73                 *eid++ = hapd->iface->channel_utilization;
  74                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  75                 eid += 2;
  76         }
  77         return eid;
  78 }
  79
  80
  81 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  82 {
  83         u8 erp = 0;
  84
  85         if (hapd->iface->current_mode == NULL ||
  86             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  87                 return 0;
  88
  89         if (hapd->iface->olbc)
  90                 erp |= ERP_INFO_USE_PROTECTION;
  91         if (hapd->iface->num_sta_non_erp > 0) {
  92                 erp |= ERP_INFO_NON_ERP_PRESENT |
  93                         ERP_INFO_USE_PROTECTION;
  94         }
  95         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  96             hapd->iconf->preamble == LONG_PREAMBLE)
  97                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  98
  99         return erp;
 100 }
 101
 102
 103 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 104 {
 105         *eid++ = WLAN_EID_DS_PARAMS;
 106         *eid++ = 1;
 107         *eid++ = hapd->iconf->channel;
 108         return eid;
 109 }
 110
 111
 112 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 113 {
 114         if (hapd->iface->current_mode == NULL ||
 115             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 116                 return eid;
 117
 118         /* Set NonERP_present and use_protection bits if there
 119          * are any associated NonERP stations. */
 120         /* TODO: use_protection bit can be set to zero even if
 121          * there are NonERP stations present. This optimization
 122          * might be useful if NonERP stations are "quiet".
 123          * See 802.11g/D6 E-1 for recommended practice.
 124          * In addition, Non ERP present might be set, if AP detects Non ERP
 125          * operation on other APs. */
 126
 127         /* Add ERP Information element */
 128         *eid++ = WLAN_EID_ERP_INFO;
 129         *eid++ = 1;
 130         *eid++ = ieee802_11_erp_info(hapd);
 131
 132         return eid;
 133 }
 134
 135
 136 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 137 {
 138         u8 *pos = eid;
 139         u8 local_pwr_constraint = 0;
 140         int dfs;
 141
 142         if (hapd->iface->current_mode == NULL ||
 143             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 144                 return eid;
 145
 146         /* Let host drivers add this IE if DFS support is offloaded */
 147         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 148                 return eid;
 149
 150         /*
 151          * There is no DFS support and power constraint was not directly
 152          * requested by config option.
 153          */
 154         if (!hapd->iconf->ieee80211h &&
 155             hapd->iconf->local_pwr_constraint == -1)
 156                 return eid;
 157
 158         /* Check if DFS is required by regulatory. */
 159         dfs = hostapd_is_dfs_required(hapd->iface);
 160         if (dfs < 0) {
 161                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 162                            dfs);
 163                 dfs = 0;
 164         }
 165
 166         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 167                 return eid;
 168
 169         /*
 170          * ieee80211h (DFS) is enabled so Power Constraint element shall
 171          * be added when running on DFS channel whenever local_pwr_constraint
 172          * is configured or not. In order to meet regulations when TPC is not
 173          * implemented using a transmit power that is below the legal maximum
 174          * (including any mitigation factor) should help. In this case,
 175          * indicate 3 dB below maximum allowed transmit power.
 176          */
 177         if (hapd->iconf->local_pwr_constraint == -1)
 178                 local_pwr_constraint = 3;
 179
 180         /*
 181          * A STA that is not an AP shall use a transmit power less than or
 182          * equal to the local maximum transmit power level for the channel.
 183          * The local maximum transmit power can be calculated from the formula:
 184          * local max TX pwr = max TX pwr - local pwr constraint
 185          * Where max TX pwr is maximum transmit power level specified for
 186          * channel in Country element and local pwr constraint is specified
 187          * for channel in this Power Constraint element.
 188          */
 189
 190         /* Element ID */
 191         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 192         /* Length */
 193         *pos++ = 1;
 194         /* Local Power Constraint */
 195         if (local_pwr_constraint)
 196                 *pos++ = local_pwr_constraint;
 197         else
 198                 *pos++ = hapd->iconf->local_pwr_constraint;
 199
 200         return pos;
 201 }
 202
 203
 204 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 205                                     struct hostapd_channel_data *start,
 206                                     struct hostapd_channel_data *prev)
 207 {
 208         if (end - pos < 3)
 209                 return pos;
 210
 211         /* first channel number */
 212         *pos++ = start->chan;
 213         /* number of channels */
 214         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 215         /* maximum transmit power level */
 216         *pos++ = start->max_tx_power;
 217
 218         return pos;
 219 }
 220
 221
 222 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 223                                 int max_len)
 224 {
 225         u8 *pos = eid;
 226         u8 *end = eid + max_len;
 227         int i;
 228         struct hostapd_hw_modes *mode;
 229         struct hostapd_channel_data *start, *prev;
 230         int chan_spacing = 1;
 231
 232         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 233             hapd->iface->current_mode == NULL)
 234                 return eid;
 235
 236         *pos++ = WLAN_EID_COUNTRY;
 237         pos++; /* length will be set later */
 238         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 239         pos += 3;
 240
 241         mode = hapd->iface->current_mode;
 242         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 243                 chan_spacing = 4;
 244
 245         start = prev = NULL;
 246         for (i = 0; i < mode->num_channels; i++) {
 247                 struct hostapd_channel_data *chan = &mode->channels[i];
 248                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 249                         continue;
 250                 if (start && prev &&
 251                     prev->chan + chan_spacing == chan->chan &&
 252                     start->max_tx_power == chan->max_tx_power) {
 253                         prev = chan;
 254                         continue; /* can use same entry */
 255                 }
 256
 257                 if (start && prev) {
 258                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 259                                                       start, prev);
 260                         start = NULL;
 261                 }
 262
 263                 /* Start new group */
 264                 start = prev = chan;
 265         }
 266
 267         if (start) {
 268                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 269                                               start, prev);
 270         }
 271
 272         if ((pos - eid) & 1) {
 273                 if (end - pos < 1)
 274                         return eid;
 275                 *pos++ = 0; /* pad for 16-bit alignment */
 276         }
 277
 278         eid[1] = (pos - eid) - 2;
 279
 280         return pos;
 281 }
 282
 283
 284 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 285 {
 286         const u8 *ie;
 287         size_t ielen;
 288
 289         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 290         if (ie == NULL || ielen > len)
 291                 return eid;
 292
 293         os_memcpy(eid, ie, ielen);
 294         return eid + ielen;
 295 }
 296
 297
 298 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 299 {
 300         u8 chan;
 301
 302         if (!hapd->cs_freq_params.freq)
 303                 return eid;
 304
 305         if (ieee80211_freq_to_chan(hapd->cs_freq_params.freq, &chan) ==
 306             NUM_HOSTAPD_MODES)
 307                 return eid;
 308
 309         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 310         *eid++ = 3;
 311         *eid++ = hapd->cs_block_tx;
 312         *eid++ = chan;
 313         *eid++ = hapd->cs_count;
 314
 315         return eid;
 316 }
 317
 318
 319 static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
 320 {
 321         u8 sec_ch;
 322
 323         if (!hapd->cs_freq_params.sec_channel_offset)
 324                 return eid;
 325
 326         if (hapd->cs_freq_params.sec_channel_offset == -1)
 327                 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
 328         else if (hapd->cs_freq_params.sec_channel_offset == 1)
 329                 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
 330         else
 331                 return eid;
 332
 333         *eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
 334         *eid++ = 1;
 335         *eid++ = sec_ch;
 336
 337         return eid;
 338 }
 339
 340
 341 static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
 342                                   u8 *start, unsigned int *csa_counter_off)
 343 {
 344         u8 *old_pos = pos;
 345
 346         if (!csa_counter_off)
 347                 return pos;
 348
 349         *csa_counter_off = 0;
 350         pos = hostapd_eid_csa(hapd, pos);
 351
 352         if (pos != old_pos) {
 353                 /* save an offset to the counter - should be last byte */
 354                 *csa_counter_off = pos - start - 1;
 355                 pos = hostapd_eid_secondary_channel(hapd, pos);
 356         }
 357
 358         return pos;
 359 }
 360
 361
 362 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 363                                    const struct ieee80211_mgmt *req,
 364                                    int is_p2p, size_t *resp_len)
 365 {
 366         struct ieee80211_mgmt *resp;
 367         u8 *pos, *epos;
 368         size_t buflen;
 369
 370 #define MAX_PROBERESP_LEN 768
 371         buflen = MAX_PROBERESP_LEN;
 372 #ifdef CONFIG_WPS
 373         if (hapd->wps_probe_resp_ie)
 374                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 375 #endif /* CONFIG_WPS */
 376 #ifdef CONFIG_P2P
 377         if (hapd->p2p_probe_resp_ie)
 378                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 379 #endif /* CONFIG_P2P */
 380 #ifdef CONFIG_FST
 381         if (hapd->iface->fst_ies)
 382                 buflen += wpabuf_len(hapd->iface->fst_ies);
 383 #endif /* CONFIG_FST */
 384         if (hapd->conf->vendor_elements)
 385                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 386         if (hapd->conf->vendor_vht) {
 387                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 388                         2 + sizeof(struct ieee80211_vht_operation);
 389         }
 390         resp = os_zalloc(buflen);
 391         if (resp == NULL)
 392                 return NULL;
 393
 394         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 395
 396         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 397                                            WLAN_FC_STYPE_PROBE_RESP);
 398         if (req)
 399                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 400         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 401
 402         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 403         resp->u.probe_resp.beacon_int =
 404                 host_to_le16(hapd->iconf->beacon_int);
 405
 406         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 407         resp->u.probe_resp.capab_info =
 408                 host_to_le16(hostapd_own_capab_info(hapd));
 409
 410         pos = resp->u.probe_resp.variable;
 411         *pos++ = WLAN_EID_SSID;
 412         *pos++ = hapd->conf->ssid.ssid_len;
 413         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 414         pos += hapd->conf->ssid.ssid_len;
 415
 416         /* Supported rates */
 417         pos = hostapd_eid_supp_rates(hapd, pos);
 418
 419         /* DS Params */
 420         pos = hostapd_eid_ds_params(hapd, pos);
 421
 422         pos = hostapd_eid_country(hapd, pos, epos - pos);
 423
 424         /* Power Constraint element */
 425         pos = hostapd_eid_pwr_constraint(hapd, pos);
 426
 427         /* ERP Information element */
 428         pos = hostapd_eid_erp_info(hapd, pos);
 429
 430         /* Extended supported rates */
 431         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 432
 433         /* RSN, MDIE, WPA */
 434         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 435
 436         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 437
 438         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 439
 440 #ifdef CONFIG_IEEE80211N
 441         pos = hostapd_eid_ht_capabilities(hapd, pos);
 442         pos = hostapd_eid_ht_operation(hapd, pos);
 443 #endif /* CONFIG_IEEE80211N */
 444
 445         pos = hostapd_eid_ext_capab(hapd, pos);
 446
 447         pos = hostapd_eid_time_adv(hapd, pos);
 448         pos = hostapd_eid_time_zone(hapd, pos);
 449
 450         pos = hostapd_eid_interworking(hapd, pos);
 451         pos = hostapd_eid_adv_proto(hapd, pos);
 452         pos = hostapd_eid_roaming_consortium(hapd, pos);
 453
 454         pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
 455                                     &hapd->cs_c_off_proberesp);
 456
 457 #ifdef CONFIG_FST
 458         if (hapd->iface->fst_ies) {
 459                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 460                           wpabuf_len(hapd->iface->fst_ies));
 461                 pos += wpabuf_len(hapd->iface->fst_ies);
 462         }
 463 #endif /* CONFIG_FST */
 464
 465 #ifdef CONFIG_IEEE80211AC
 466         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 467                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 468                 pos = hostapd_eid_vht_operation(hapd, pos);
 469         }
 470         if (hapd->conf->vendor_vht)
 471                 pos = hostapd_eid_vendor_vht(hapd, pos);
 472 #endif /* CONFIG_IEEE80211AC */
 473
 474         /* Wi-Fi Alliance WMM */
 475         pos = hostapd_eid_wmm(hapd, pos);
 476
 477 #ifdef CONFIG_WPS
 478         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 479                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 480                           wpabuf_len(hapd->wps_probe_resp_ie));
 481                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 482         }
 483 #endif /* CONFIG_WPS */
 484
 485 #ifdef CONFIG_P2P
 486         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 487             hapd->p2p_probe_resp_ie) {
 488                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 489                           wpabuf_len(hapd->p2p_probe_resp_ie));
 490                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 491         }
 492 #endif /* CONFIG_P2P */
 493 #ifdef CONFIG_P2P_MANAGER
 494         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 495             P2P_MANAGE)
 496                 pos = hostapd_eid_p2p_manage(hapd, pos);
 497 #endif /* CONFIG_P2P_MANAGER */
 498
 499 #ifdef CONFIG_HS20
 500         pos = hostapd_eid_hs20_indication(hapd, pos);
 501         pos = hostapd_eid_osen(hapd, pos);
 502 #endif /* CONFIG_HS20 */
 503
 504         if (hapd->conf->vendor_elements) {
 505                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 506                           wpabuf_len(hapd->conf->vendor_elements));
 507                 pos += wpabuf_len(hapd->conf->vendor_elements);
 508         }
 509
 510         *resp_len = pos - (u8 *) resp;
 511         return (u8 *) resp;
 512 }
 513
 514
 515 enum ssid_match_result {
 516         NO_SSID_MATCH,
 517         EXACT_SSID_MATCH,
 518         WILDCARD_SSID_MATCH
 519 };
 520
 521 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 522                                          const u8 *ssid, size_t ssid_len,
 523                                          const u8 *ssid_list,
 524                                          size_t ssid_list_len)
 525 {
 526         const u8 *pos, *end;
 527         int wildcard = 0;
 528
 529         if (ssid_len == 0)
 530                 wildcard = 1;
 531         if (ssid_len == hapd->conf->ssid.ssid_len &&
 532             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 533                 return EXACT_SSID_MATCH;
 534
 535         if (ssid_list == NULL)
 536                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 537
 538         pos = ssid_list;
 539         end = ssid_list + ssid_list_len;
 540         while (pos + 1 <= end) {
 541                 if (pos + 2 + pos[1] > end)
 542                         break;
 543                 if (pos[1] == 0)
 544                         wildcard = 1;
 545                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 546                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 547                         return EXACT_SSID_MATCH;
 548                 pos += 2 + pos[1];
 549         }
 550
 551         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 552 }
 553
 554
 555 void sta_track_expire(struct hostapd_iface *iface, int force)
 556 {
 557         struct os_reltime now;
 558         struct hostapd_sta_info *info;
 559
 560         if (!iface->num_sta_seen)
 561                 return;
 562
 563         os_get_reltime(&now);
 564         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 565                                      list))) {
 566                 if (!force &&
 567                     !os_reltime_expired(&now, &info->last_seen,
 568                                         iface->conf->track_sta_max_age))
 569                         break;
 570                 force = 0;
 571
 572                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 573                            MACSTR, iface->bss[0]->conf->iface,
 574                            MAC2STR(info->addr));
 575                 dl_list_del(&info->list);
 576                 iface->num_sta_seen--;
 577                 os_free(info);
 578         }
 579 }
 580
 581
 582 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 583                                                const u8 *addr)
 584 {
 585         struct hostapd_sta_info *info;
 586
 587         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 588                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 589                         return info;
 590
 591         return NULL;
 592 }
 593
 594
 595 static void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 596 {
 597         struct hostapd_sta_info *info;
 598
 599         info = sta_track_get(iface, addr);
 600         if (info) {
 601                 /* Move the most recent entry to the end of the list */
 602                 dl_list_del(&info->list);
 603                 dl_list_add_tail(&iface->sta_seen, &info->list);
 604                 os_get_reltime(&info->last_seen);
 605                 return;
 606         }
 607
 608         /* Add a new entry */
 609         info = os_zalloc(sizeof(*info));
 610         os_memcpy(info->addr, addr, ETH_ALEN);
 611         os_get_reltime(&info->last_seen);
 612
 613         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 614                 /* Expire oldest entry to make room for a new one */
 615                 sta_track_expire(iface, 1);
 616         }
 617
 618         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 619                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 620         dl_list_add_tail(&iface->sta_seen, &info->list);
 621         iface->num_sta_seen++;
 622 }
 623
 624
 625 void handle_probe_req(struct hostapd_data *hapd,
 626                       const struct ieee80211_mgmt *mgmt, size_t len,
 627                       int ssi_signal)
 628 {
 629         u8 *resp;
 630         struct ieee802_11_elems elems;
 631         const u8 *ie;
 632         size_t ie_len;
 633         size_t i, resp_len;
 634         int noack;
 635         enum ssid_match_result res;
 636
 637         ie = mgmt->u.probe_req.variable;
 638         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 639                 return;
 640         if (hapd->iconf->track_sta_max_num)
 641                 sta_track_add(hapd->iface, mgmt->sa);
 642         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 643
 644         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 645                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 646                                             mgmt->sa, mgmt->da, mgmt->bssid,
 647                                             ie, ie_len, ssi_signal) > 0)
 648                         return;
 649
 650         if (!hapd->iconf->send_probe_response)
 651                 return;
 652
 653         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 654                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 655                            MAC2STR(mgmt->sa));
 656                 return;
 657         }
 658
 659         if ((!elems.ssid || !elems.supp_rates)) {
 660                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 661                            "without SSID or supported rates element",
 662                            MAC2STR(mgmt->sa));
 663                 return;
 664         }
 665
 666         /*
 667          * No need to reply if the Probe Request frame was sent on an adjacent
 668          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 669          * AP with dot11RadioMeasurementActivated set to true, but strictly
 670          * speaking does not allow such ignoring of Probe Request frames if
 671          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 672          * number of unnecessary Probe Response frames for cases where the STA
 673          * is less likely to see them (Probe Request frame sent on a
 674          * neighboring, but partially overlapping, channel).
 675          */
 676         if (elems.ds_params &&
 677             hapd->iface->current_mode &&
 678             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 679              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 680             hapd->iconf->channel != elems.ds_params[0]) {
 681                 wpa_printf(MSG_DEBUG,
 682                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 683                            hapd->iconf->channel, elems.ds_params[0]);
 684                 return;
 685         }
 686
 687 #ifdef CONFIG_P2P
 688         if (hapd->p2p && elems.wps_ie) {
 689                 struct wpabuf *wps;
 690                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 691                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 692                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 693                                    "due to mismatch with Requested Device "
 694                                    "Type");
 695                         wpabuf_free(wps);
 696                         return;
 697                 }
 698                 wpabuf_free(wps);
 699         }
 700
 701         if (hapd->p2p && elems.p2p) {
 702                 struct wpabuf *p2p;
 703                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 704                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 705                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 706                                    "due to mismatch with Device ID");
 707                         wpabuf_free(p2p);
 708                         return;
 709                 }
 710                 wpabuf_free(p2p);
 711         }
 712 #endif /* CONFIG_P2P */
 713
 714         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 715             elems.ssid_list_len == 0) {
 716                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 717                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 718                 return;
 719         }
 720
 721 #ifdef CONFIG_P2P
 722         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 723             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 724             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 725                       P2P_WILDCARD_SSID_LEN) == 0) {
 726                 /* Process P2P Wildcard SSID like Wildcard SSID */
 727                 elems.ssid_len = 0;
 728         }
 729 #endif /* CONFIG_P2P */
 730
 731         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 732                          elems.ssid_list, elems.ssid_list_len);
 733         if (res == NO_SSID_MATCH) {
 734                 if (!(mgmt->da[0] & 0x01)) {
 735                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 736                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 737                                    MAC2STR(mgmt->sa),
 738                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 739                                    MAC2STR(mgmt->da),
 740                                    elems.ssid_list ? " (SSID list)" : "");
 741                 }
 742                 return;
 743         }
 744
 745 #ifdef CONFIG_INTERWORKING
 746         if (hapd->conf->interworking &&
 747             elems.interworking && elems.interworking_len >= 1) {
 748                 u8 ant = elems.interworking[0] & 0x0f;
 749                 if (ant != INTERWORKING_ANT_WILDCARD &&
 750                     ant != hapd->conf->access_network_type) {
 751                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 752                                    " for mismatching ANT %u ignored",
 753                                    MAC2STR(mgmt->sa), ant);
 754                         return;
 755                 }
 756         }
 757
 758         if (hapd->conf->interworking && elems.interworking &&
 759             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 760                 const u8 *hessid;
 761                 if (elems.interworking_len == 7)
 762                         hessid = elems.interworking + 1;
 763                 else
 764                         hessid = elems.interworking + 1 + 2;
 765                 if (!is_broadcast_ether_addr(hessid) &&
 766                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 767                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 768                                    " for mismatching HESSID " MACSTR
 769                                    " ignored",
 770                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 771                         return;
 772                 }
 773         }
 774 #endif /* CONFIG_INTERWORKING */
 775
 776 #ifdef CONFIG_P2P
 777         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 778             supp_rates_11b_only(&elems)) {
 779                 /* Indicates support for 11b rates only */
 780                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 781                            MACSTR " with only 802.11b rates",
 782                            MAC2STR(mgmt->sa));
 783                 return;
 784         }
 785 #endif /* CONFIG_P2P */
 786
 787         /* TODO: verify that supp_rates contains at least one matching rate
 788          * with AP configuration */
 789
 790 #ifdef CONFIG_TESTING_OPTIONS
 791         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 792             drand48() < hapd->iconf->ignore_probe_probability) {
 793                 wpa_printf(MSG_INFO,
 794                            "TESTING: ignoring probe request from " MACSTR,
 795                            MAC2STR(mgmt->sa));
 796                 return;
 797         }
 798 #endif /* CONFIG_TESTING_OPTIONS */
 799
 800         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 801                                       &resp_len);
 802         if (resp == NULL)
 803                 return;
 804
 805         /*
 806          * If this is a broadcast probe request, apply no ack policy to avoid
 807          * excessive retries.
 808          */
 809         noack = !!(res == WILDCARD_SSID_MATCH &&
 810                    is_broadcast_ether_addr(mgmt->da));
 811
 812         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 813                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 814
 815         os_free(resp);
 816
 817         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 818                    "SSID", MAC2STR(mgmt->sa),
 819                    elems.ssid_len == 0 ? "broadcast" : "our");
 820 }
 821
 822
 823 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 824                                         size_t *resp_len)
 825 {
 826         /* check probe response offloading caps and print warnings */
 827         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 828                 return NULL;
 829
 830 #ifdef CONFIG_WPS
 831         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 832             (!(hapd->iface->probe_resp_offloads &
 833                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 834                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 835                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 836                            "Probe Response while not supporting this");
 837 #endif /* CONFIG_WPS */
 838
 839 #ifdef CONFIG_P2P
 840         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 841             !(hapd->iface->probe_resp_offloads &
 842               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 843                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 844                            "Probe Response while not supporting this");
 845 #endif  /* CONFIG_P2P */
 846
 847         if (hapd->conf->interworking &&
 848             !(hapd->iface->probe_resp_offloads &
 849               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 850                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 851                            "Interworking Probe Response while not supporting "
 852                            "this");
 853
 854         /* Generate a Probe Response template for the non-P2P case */
 855         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 856 }
 857
 858 #endif /* NEED_AP_MLME */
 859
 860
 861 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 862                                struct wpa_driver_ap_params *params)
 863 {
 864         struct ieee80211_mgmt *head = NULL;
 865         u8 *tail = NULL;
 866         size_t head_len = 0, tail_len = 0;
 867         u8 *resp = NULL;
 868         size_t resp_len = 0;
 869 #ifdef NEED_AP_MLME
 870         u16 capab_info;
 871         u8 *pos, *tailpos;
 872
 873 #define BEACON_HEAD_BUF_SIZE 256
 874 #define BEACON_TAIL_BUF_SIZE 512
 875         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 876         tail_len = BEACON_TAIL_BUF_SIZE;
 877 #ifdef CONFIG_WPS
 878         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 879                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 880 #endif /* CONFIG_WPS */
 881 #ifdef CONFIG_P2P
 882         if (hapd->p2p_beacon_ie)
 883                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 884 #endif /* CONFIG_P2P */
 885 #ifdef CONFIG_FST
 886         if (hapd->iface->fst_ies)
 887                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 888 #endif /* CONFIG_FST */
 889         if (hapd->conf->vendor_elements)
 890                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 891
 892 #ifdef CONFIG_IEEE80211AC
 893         if (hapd->conf->vendor_vht) {
 894                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 895                         2 + sizeof(struct ieee80211_vht_operation);
 896         }
 897 #endif /* CONFIG_IEEE80211AC */
 898
 899         tailpos = tail = os_malloc(tail_len);
 900         if (head == NULL || tail == NULL) {
 901                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 902                 os_free(head);
 903                 os_free(tail);
 904                 return -1;
 905         }
 906
 907         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 908                                            WLAN_FC_STYPE_BEACON);
 909         head->duration = host_to_le16(0);
 910         os_memset(head->da, 0xff, ETH_ALEN);
 911
 912         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 913         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 914         head->u.beacon.beacon_int =
 915                 host_to_le16(hapd->iconf->beacon_int);
 916
 917         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 918         capab_info = hostapd_own_capab_info(hapd);
 919         head->u.beacon.capab_info = host_to_le16(capab_info);
 920         pos = &head->u.beacon.variable[0];
 921
 922         /* SSID */
 923         *pos++ = WLAN_EID_SSID;
 924         if (hapd->conf->ignore_broadcast_ssid == 2) {
 925                 /* clear the data, but keep the correct length of the SSID */
 926                 *pos++ = hapd->conf->ssid.ssid_len;
 927                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 928                 pos += hapd->conf->ssid.ssid_len;
 929         } else if (hapd->conf->ignore_broadcast_ssid) {
 930                 *pos++ = 0; /* empty SSID */
 931         } else {
 932                 *pos++ = hapd->conf->ssid.ssid_len;
 933                 os_memcpy(pos, hapd->conf->ssid.ssid,
 934                           hapd->conf->ssid.ssid_len);
 935                 pos += hapd->conf->ssid.ssid_len;
 936         }
 937
 938         /* Supported rates */
 939         pos = hostapd_eid_supp_rates(hapd, pos);
 940
 941         /* DS Params */
 942         pos = hostapd_eid_ds_params(hapd, pos);
 943
 944         head_len = pos - (u8 *) head;
 945
 946         tailpos = hostapd_eid_country(hapd, tailpos,
 947                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 948
 949         /* Power Constraint element */
 950         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
 951
 952         /* ERP Information element */
 953         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 954
 955         /* Extended supported rates */
 956         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
 957
 958         /* RSN, MDIE, WPA */
 959         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
 960                                   tailpos);
 961
 962         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
 963                                                tail + BEACON_TAIL_BUF_SIZE -
 964                                                tailpos);
 965
 966         tailpos = hostapd_eid_bss_load(hapd, tailpos,
 967                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
 968
 969 #ifdef CONFIG_IEEE80211N
 970         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
 971         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
 972 #endif /* CONFIG_IEEE80211N */
 973
 974         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
 975
 976         /*
 977          * TODO: Time Advertisement element should only be included in some
 978          * DTIM Beacon frames.
 979          */
 980         tailpos = hostapd_eid_time_adv(hapd, tailpos);
 981
 982         tailpos = hostapd_eid_interworking(hapd, tailpos);
 983         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
 984         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
 985         tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
 986                                         &hapd->cs_c_off_beacon);
 987
 988 #ifdef CONFIG_FST
 989         if (hapd->iface->fst_ies) {
 990                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
 991                           wpabuf_len(hapd->iface->fst_ies));
 992                 tailpos += wpabuf_len(hapd->iface->fst_ies);
 993         }
 994 #endif /* CONFIG_FST */
 995
 996 #ifdef CONFIG_IEEE80211AC
 997         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 998                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
 999                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1000         }
1001         if (hapd->conf->vendor_vht)
1002                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1003 #endif /* CONFIG_IEEE80211AC */
1004
1005         /* Wi-Fi Alliance WMM */
1006         tailpos = hostapd_eid_wmm(hapd, tailpos);
1007
1008 #ifdef CONFIG_WPS
1009         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1010                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1011                           wpabuf_len(hapd->wps_beacon_ie));
1012                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1013         }
1014 #endif /* CONFIG_WPS */
1015
1016 #ifdef CONFIG_P2P
1017         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1018                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1019                           wpabuf_len(hapd->p2p_beacon_ie));
1020                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1021         }
1022 #endif /* CONFIG_P2P */
1023 #ifdef CONFIG_P2P_MANAGER
1024         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1025             P2P_MANAGE)
1026                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1027 #endif /* CONFIG_P2P_MANAGER */
1028
1029 #ifdef CONFIG_HS20
1030         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1031         tailpos = hostapd_eid_osen(hapd, tailpos);
1032 #endif /* CONFIG_HS20 */
1033
1034         if (hapd->conf->vendor_elements) {
1035                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1036                           wpabuf_len(hapd->conf->vendor_elements));
1037                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1038         }
1039
1040         tail_len = tailpos > tail ? tailpos - tail : 0;
1041
1042         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1043 #endif /* NEED_AP_MLME */
1044
1045         os_memset(params, 0, sizeof(*params));
1046         params->head = (u8 *) head;
1047         params->head_len = head_len;
1048         params->tail = tail;
1049         params->tail_len = tail_len;
1050         params->proberesp = resp;
1051         params->proberesp_len = resp_len;
1052         params->dtim_period = hapd->conf->dtim_period;
1053         params->beacon_int = hapd->iconf->beacon_int;
1054         params->basic_rates = hapd->iface->basic_rates;
1055         params->ssid = hapd->conf->ssid.ssid;
1056         params->ssid_len = hapd->conf->ssid.ssid_len;
1057         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1058             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1059                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1060                         hapd->conf->rsn_pairwise;
1061         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1062                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1063         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1064                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1065         params->group_cipher = hapd->conf->wpa_group;
1066         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1067         params->auth_algs = hapd->conf->auth_algs;
1068         params->wpa_version = hapd->conf->wpa;
1069         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1070                 (hapd->conf->ieee802_1x &&
1071                  (hapd->conf->default_wep_key_len ||
1072                   hapd->conf->individual_wep_key_len));
1073         switch (hapd->conf->ignore_broadcast_ssid) {
1074         case 0:
1075                 params->hide_ssid = NO_SSID_HIDING;
1076                 break;
1077         case 1:
1078                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1079                 break;
1080         case 2:
1081                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1082                 break;
1083         }
1084         params->isolate = hapd->conf->isolate;
1085         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1086 #ifdef NEED_AP_MLME
1087         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1088                                 ERP_INFO_USE_PROTECTION);
1089         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1090                 hapd->iconf->preamble == SHORT_PREAMBLE;
1091         if (hapd->iface->current_mode &&
1092             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1093                 params->short_slot_time =
1094                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1095         else
1096                 params->short_slot_time = -1;
1097         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1098                 params->ht_opmode = -1;
1099         else
1100                 params->ht_opmode = hapd->iface->ht_op_mode;
1101 #endif /* NEED_AP_MLME */
1102         params->interworking = hapd->conf->interworking;
1103         if (hapd->conf->interworking &&
1104             !is_zero_ether_addr(hapd->conf->hessid))
1105                 params->hessid = hapd->conf->hessid;
1106         params->access_network_type = hapd->conf->access_network_type;
1107         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1108 #ifdef CONFIG_P2P
1109         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1110 #endif /* CONFIG_P2P */
1111 #ifdef CONFIG_HS20
1112         params->disable_dgaf = hapd->conf->disable_dgaf;
1113         if (hapd->conf->osen) {
1114                 params->privacy = 1;
1115                 params->osen = 1;
1116         }
1117 #endif /* CONFIG_HS20 */
1118         return 0;
1119 }
1120
1121
1122 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1123 {
1124         os_free(params->tail);
1125         params->tail = NULL;
1126         os_free(params->head);
1127         params->head = NULL;
1128         os_free(params->proberesp);
1129         params->proberesp = NULL;
1130 }
1131
1132
1133 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1134 {
1135         struct wpa_driver_ap_params params;
1136         struct hostapd_freq_params freq;
1137         struct hostapd_iface *iface = hapd->iface;
1138         struct hostapd_config *iconf = iface->conf;
1139         struct wpabuf *beacon, *proberesp, *assocresp;
1140         int res, ret = -1;
1141
1142         if (hapd->csa_in_progress) {
1143                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1144                 return -1;
1145         }
1146
1147         hapd->beacon_set_done = 1;
1148
1149         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1150                 return -1;
1151
1152         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1153             0)
1154                 goto fail;
1155
1156         params.beacon_ies = beacon;
1157         params.proberesp_ies = proberesp;
1158         params.assocresp_ies = assocresp;
1159         params.reenable = hapd->reenable_beacon;
1160         hapd->reenable_beacon = 0;
1161
1162         if (iface->current_mode &&
1163             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1164                                     iconf->channel, iconf->ieee80211n,
1165                                     iconf->ieee80211ac,
1166                                     iconf->secondary_channel,
1167                                     iconf->vht_oper_chwidth,
1168                                     iconf->vht_oper_centr_freq_seg0_idx,
1169                                     iconf->vht_oper_centr_freq_seg1_idx,
1170                                     iface->current_mode->vht_capab) == 0)
1171                 params.freq = &freq;
1172
1173         res = hostapd_drv_set_ap(hapd, &params);
1174         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1175         if (res)
1176                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1177         else
1178                 ret = 0;
1179 fail:
1180         ieee802_11_free_ap_params(&params);
1181         return ret;
1182 }
1183
1184
1185 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1186 {
1187         size_t i;
1188         int ret = 0;
1189
1190         for (i = 0; i < iface->num_bss; i++) {
1191                 if (iface->bss[i]->started &&
1192                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1193                         ret = -1;
1194         }
1195
1196         return ret;
1197 }
1198
1199
1200 /* only update beacons if started */
1201 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1202 {
1203         size_t i;
1204         int ret = 0;
1205
1206         for (i = 0; i < iface->num_bss; i++) {
1207                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1208                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1209                         ret = -1;
1210         }
1211
1212         return ret;
1213 }
1214
1215 #endif /* CONFIG_NATIVE_WINDOWS */