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         if (!hapd->cs_freq_params.channel)
 301                 return eid;
 302
 303         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 304         *eid++ = 3;
 305         *eid++ = hapd->cs_block_tx;
 306         *eid++ = hapd->cs_freq_params.channel;
 307         *eid++ = hapd->cs_count;
 308
 309         return eid;
 310 }
 311
 312
 313 static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
 314 {
 315         u8 sec_ch;
 316
 317         if (!hapd->cs_freq_params.sec_channel_offset)
 318                 return eid;
 319
 320         if (hapd->cs_freq_params.sec_channel_offset == -1)
 321                 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
 322         else if (hapd->cs_freq_params.sec_channel_offset == 1)
 323                 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
 324         else
 325                 return eid;
 326
 327         *eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
 328         *eid++ = 1;
 329         *eid++ = sec_ch;
 330
 331         return eid;
 332 }
 333
 334
 335 static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
 336                                   u8 *start, unsigned int *csa_counter_off)
 337 {
 338         u8 *old_pos = pos;
 339
 340         if (!csa_counter_off)
 341                 return pos;
 342
 343         *csa_counter_off = 0;
 344         pos = hostapd_eid_csa(hapd, pos);
 345
 346         if (pos != old_pos) {
 347                 /* save an offset to the counter - should be last byte */
 348                 *csa_counter_off = pos - start - 1;
 349                 pos = hostapd_eid_secondary_channel(hapd, pos);
 350         }
 351
 352         return pos;
 353 }
 354
 355
 356 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 357                                    const struct ieee80211_mgmt *req,
 358                                    int is_p2p, size_t *resp_len)
 359 {
 360         struct ieee80211_mgmt *resp;
 361         u8 *pos, *epos;
 362         size_t buflen;
 363
 364 #define MAX_PROBERESP_LEN 768
 365         buflen = MAX_PROBERESP_LEN;
 366 #ifdef CONFIG_WPS
 367         if (hapd->wps_probe_resp_ie)
 368                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 369 #endif /* CONFIG_WPS */
 370 #ifdef CONFIG_P2P
 371         if (hapd->p2p_probe_resp_ie)
 372                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 373 #endif /* CONFIG_P2P */
 374 #ifdef CONFIG_FST
 375         if (hapd->iface->fst_ies)
 376                 buflen += wpabuf_len(hapd->iface->fst_ies);
 377 #endif /* CONFIG_FST */
 378         if (hapd->conf->vendor_elements)
 379                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 380         if (hapd->conf->vendor_vht) {
 381                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 382                         2 + sizeof(struct ieee80211_vht_operation);
 383         }
 384         resp = os_zalloc(buflen);
 385         if (resp == NULL)
 386                 return NULL;
 387
 388         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 389
 390         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 391                                            WLAN_FC_STYPE_PROBE_RESP);
 392         if (req)
 393                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 394         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 395
 396         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 397         resp->u.probe_resp.beacon_int =
 398                 host_to_le16(hapd->iconf->beacon_int);
 399
 400         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 401         resp->u.probe_resp.capab_info =
 402                 host_to_le16(hostapd_own_capab_info(hapd));
 403
 404         pos = resp->u.probe_resp.variable;
 405         *pos++ = WLAN_EID_SSID;
 406         *pos++ = hapd->conf->ssid.ssid_len;
 407         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 408         pos += hapd->conf->ssid.ssid_len;
 409
 410         /* Supported rates */
 411         pos = hostapd_eid_supp_rates(hapd, pos);
 412
 413         /* DS Params */
 414         pos = hostapd_eid_ds_params(hapd, pos);
 415
 416         pos = hostapd_eid_country(hapd, pos, epos - pos);
 417
 418         /* Power Constraint element */
 419         pos = hostapd_eid_pwr_constraint(hapd, pos);
 420
 421         /* ERP Information element */
 422         pos = hostapd_eid_erp_info(hapd, pos);
 423
 424         /* Extended supported rates */
 425         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 426
 427         /* RSN, MDIE, WPA */
 428         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 429
 430         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 431
 432         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 433
 434 #ifdef CONFIG_IEEE80211N
 435         pos = hostapd_eid_ht_capabilities(hapd, pos);
 436         pos = hostapd_eid_ht_operation(hapd, pos);
 437 #endif /* CONFIG_IEEE80211N */
 438
 439         pos = hostapd_eid_ext_capab(hapd, pos);
 440
 441         pos = hostapd_eid_time_adv(hapd, pos);
 442         pos = hostapd_eid_time_zone(hapd, pos);
 443
 444         pos = hostapd_eid_interworking(hapd, pos);
 445         pos = hostapd_eid_adv_proto(hapd, pos);
 446         pos = hostapd_eid_roaming_consortium(hapd, pos);
 447
 448         pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
 449                                     &hapd->cs_c_off_proberesp);
 450
 451 #ifdef CONFIG_FST
 452         if (hapd->iface->fst_ies) {
 453                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 454                           wpabuf_len(hapd->iface->fst_ies));
 455                 pos += wpabuf_len(hapd->iface->fst_ies);
 456         }
 457 #endif /* CONFIG_FST */
 458
 459 #ifdef CONFIG_IEEE80211AC
 460         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 461                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 462                 pos = hostapd_eid_vht_operation(hapd, pos);
 463         }
 464         if (hapd->conf->vendor_vht)
 465                 pos = hostapd_eid_vendor_vht(hapd, pos);
 466 #endif /* CONFIG_IEEE80211AC */
 467
 468         /* Wi-Fi Alliance WMM */
 469         pos = hostapd_eid_wmm(hapd, pos);
 470
 471 #ifdef CONFIG_WPS
 472         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 473                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 474                           wpabuf_len(hapd->wps_probe_resp_ie));
 475                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 476         }
 477 #endif /* CONFIG_WPS */
 478
 479 #ifdef CONFIG_P2P
 480         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 481             hapd->p2p_probe_resp_ie) {
 482                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 483                           wpabuf_len(hapd->p2p_probe_resp_ie));
 484                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 485         }
 486 #endif /* CONFIG_P2P */
 487 #ifdef CONFIG_P2P_MANAGER
 488         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 489             P2P_MANAGE)
 490                 pos = hostapd_eid_p2p_manage(hapd, pos);
 491 #endif /* CONFIG_P2P_MANAGER */
 492
 493 #ifdef CONFIG_HS20
 494         pos = hostapd_eid_hs20_indication(hapd, pos);
 495         pos = hostapd_eid_osen(hapd, pos);
 496 #endif /* CONFIG_HS20 */
 497
 498         if (hapd->conf->vendor_elements) {
 499                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 500                           wpabuf_len(hapd->conf->vendor_elements));
 501                 pos += wpabuf_len(hapd->conf->vendor_elements);
 502         }
 503
 504         *resp_len = pos - (u8 *) resp;
 505         return (u8 *) resp;
 506 }
 507
 508
 509 enum ssid_match_result {
 510         NO_SSID_MATCH,
 511         EXACT_SSID_MATCH,
 512         WILDCARD_SSID_MATCH
 513 };
 514
 515 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 516                                          const u8 *ssid, size_t ssid_len,
 517                                          const u8 *ssid_list,
 518                                          size_t ssid_list_len)
 519 {
 520         const u8 *pos, *end;
 521         int wildcard = 0;
 522
 523         if (ssid_len == 0)
 524                 wildcard = 1;
 525         if (ssid_len == hapd->conf->ssid.ssid_len &&
 526             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 527                 return EXACT_SSID_MATCH;
 528
 529         if (ssid_list == NULL)
 530                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 531
 532         pos = ssid_list;
 533         end = ssid_list + ssid_list_len;
 534         while (pos + 1 <= end) {
 535                 if (pos + 2 + pos[1] > end)
 536                         break;
 537                 if (pos[1] == 0)
 538                         wildcard = 1;
 539                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 540                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 541                         return EXACT_SSID_MATCH;
 542                 pos += 2 + pos[1];
 543         }
 544
 545         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 546 }
 547
 548
 549 void sta_track_expire(struct hostapd_iface *iface, int force)
 550 {
 551         struct os_reltime now;
 552         struct hostapd_sta_info *info;
 553
 554         if (!iface->num_sta_seen)
 555                 return;
 556
 557         os_get_reltime(&now);
 558         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 559                                      list))) {
 560                 if (!force &&
 561                     !os_reltime_expired(&now, &info->last_seen,
 562                                         iface->conf->track_sta_max_age))
 563                         break;
 564                 force = 0;
 565
 566                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 567                            MACSTR, iface->bss[0]->conf->iface,
 568                            MAC2STR(info->addr));
 569                 dl_list_del(&info->list);
 570                 iface->num_sta_seen--;
 571                 os_free(info);
 572         }
 573 }
 574
 575
 576 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 577                                                const u8 *addr)
 578 {
 579         struct hostapd_sta_info *info;
 580
 581         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 582                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 583                         return info;
 584
 585         return NULL;
 586 }
 587
 588
 589 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 590 {
 591         struct hostapd_sta_info *info;
 592
 593         info = sta_track_get(iface, addr);
 594         if (info) {
 595                 /* Move the most recent entry to the end of the list */
 596                 dl_list_del(&info->list);
 597                 dl_list_add_tail(&iface->sta_seen, &info->list);
 598                 os_get_reltime(&info->last_seen);
 599                 return;
 600         }
 601
 602         /* Add a new entry */
 603         info = os_zalloc(sizeof(*info));
 604         os_memcpy(info->addr, addr, ETH_ALEN);
 605         os_get_reltime(&info->last_seen);
 606
 607         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 608                 /* Expire oldest entry to make room for a new one */
 609                 sta_track_expire(iface, 1);
 610         }
 611
 612         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 613                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 614         dl_list_add_tail(&iface->sta_seen, &info->list);
 615         iface->num_sta_seen++;
 616 }
 617
 618
 619 struct hostapd_data *
 620 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 621                   const char *ifname)
 622 {
 623         struct hapd_interfaces *interfaces = iface->interfaces;
 624         size_t i, j;
 625
 626         for (i = 0; i < interfaces->count; i++) {
 627                 struct hostapd_data *hapd = NULL;
 628
 629                 iface = interfaces->iface[i];
 630                 for (j = 0; j < iface->num_bss; j++) {
 631                         hapd = iface->bss[j];
 632                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 633                                 break;
 634                         hapd = NULL;
 635                 }
 636
 637                 if (hapd && sta_track_get(iface, addr))
 638                         return hapd;
 639         }
 640
 641         return NULL;
 642 }
 643
 644
 645 void handle_probe_req(struct hostapd_data *hapd,
 646                       const struct ieee80211_mgmt *mgmt, size_t len,
 647                       int ssi_signal)
 648 {
 649         u8 *resp;
 650         struct ieee802_11_elems elems;
 651         const u8 *ie;
 652         size_t ie_len;
 653         size_t i, resp_len;
 654         int noack;
 655         enum ssid_match_result res;
 656
 657         ie = mgmt->u.probe_req.variable;
 658         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 659                 return;
 660         if (hapd->iconf->track_sta_max_num)
 661                 sta_track_add(hapd->iface, mgmt->sa);
 662         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 663
 664         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 665                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 666                                             mgmt->sa, mgmt->da, mgmt->bssid,
 667                                             ie, ie_len, ssi_signal) > 0)
 668                         return;
 669
 670         if (!hapd->iconf->send_probe_response)
 671                 return;
 672
 673         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 674                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 675                            MAC2STR(mgmt->sa));
 676                 return;
 677         }
 678
 679         if ((!elems.ssid || !elems.supp_rates)) {
 680                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 681                            "without SSID or supported rates element",
 682                            MAC2STR(mgmt->sa));
 683                 return;
 684         }
 685
 686         /*
 687          * No need to reply if the Probe Request frame was sent on an adjacent
 688          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 689          * AP with dot11RadioMeasurementActivated set to true, but strictly
 690          * speaking does not allow such ignoring of Probe Request frames if
 691          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 692          * number of unnecessary Probe Response frames for cases where the STA
 693          * is less likely to see them (Probe Request frame sent on a
 694          * neighboring, but partially overlapping, channel).
 695          */
 696         if (elems.ds_params &&
 697             hapd->iface->current_mode &&
 698             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 699              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 700             hapd->iconf->channel != elems.ds_params[0]) {
 701                 wpa_printf(MSG_DEBUG,
 702                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 703                            hapd->iconf->channel, elems.ds_params[0]);
 704                 return;
 705         }
 706
 707 #ifdef CONFIG_P2P
 708         if (hapd->p2p && elems.wps_ie) {
 709                 struct wpabuf *wps;
 710                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 711                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 712                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 713                                    "due to mismatch with Requested Device "
 714                                    "Type");
 715                         wpabuf_free(wps);
 716                         return;
 717                 }
 718                 wpabuf_free(wps);
 719         }
 720
 721         if (hapd->p2p && elems.p2p) {
 722                 struct wpabuf *p2p;
 723                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 724                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 725                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 726                                    "due to mismatch with Device ID");
 727                         wpabuf_free(p2p);
 728                         return;
 729                 }
 730                 wpabuf_free(p2p);
 731         }
 732 #endif /* CONFIG_P2P */
 733
 734         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 735             elems.ssid_list_len == 0) {
 736                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 737                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 738                 return;
 739         }
 740
 741 #ifdef CONFIG_P2P
 742         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 743             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 744             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 745                       P2P_WILDCARD_SSID_LEN) == 0) {
 746                 /* Process P2P Wildcard SSID like Wildcard SSID */
 747                 elems.ssid_len = 0;
 748         }
 749 #endif /* CONFIG_P2P */
 750
 751         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 752                          elems.ssid_list, elems.ssid_list_len);
 753         if (res == NO_SSID_MATCH) {
 754                 if (!(mgmt->da[0] & 0x01)) {
 755                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 756                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 757                                    MAC2STR(mgmt->sa),
 758                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 759                                    MAC2STR(mgmt->da),
 760                                    elems.ssid_list ? " (SSID list)" : "");
 761                 }
 762                 return;
 763         }
 764
 765 #ifdef CONFIG_INTERWORKING
 766         if (hapd->conf->interworking &&
 767             elems.interworking && elems.interworking_len >= 1) {
 768                 u8 ant = elems.interworking[0] & 0x0f;
 769                 if (ant != INTERWORKING_ANT_WILDCARD &&
 770                     ant != hapd->conf->access_network_type) {
 771                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 772                                    " for mismatching ANT %u ignored",
 773                                    MAC2STR(mgmt->sa), ant);
 774                         return;
 775                 }
 776         }
 777
 778         if (hapd->conf->interworking && elems.interworking &&
 779             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 780                 const u8 *hessid;
 781                 if (elems.interworking_len == 7)
 782                         hessid = elems.interworking + 1;
 783                 else
 784                         hessid = elems.interworking + 1 + 2;
 785                 if (!is_broadcast_ether_addr(hessid) &&
 786                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 787                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 788                                    " for mismatching HESSID " MACSTR
 789                                    " ignored",
 790                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 791                         return;
 792                 }
 793         }
 794 #endif /* CONFIG_INTERWORKING */
 795
 796 #ifdef CONFIG_P2P
 797         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 798             supp_rates_11b_only(&elems)) {
 799                 /* Indicates support for 11b rates only */
 800                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 801                            MACSTR " with only 802.11b rates",
 802                            MAC2STR(mgmt->sa));
 803                 return;
 804         }
 805 #endif /* CONFIG_P2P */
 806
 807         /* TODO: verify that supp_rates contains at least one matching rate
 808          * with AP configuration */
 809
 810         if (hapd->conf->no_probe_resp_if_seen_on &&
 811             is_multicast_ether_addr(mgmt->da) &&
 812             is_multicast_ether_addr(mgmt->bssid) &&
 813             sta_track_seen_on(hapd->iface, mgmt->sa,
 814                               hapd->conf->no_probe_resp_if_seen_on)) {
 815                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 816                            " since STA has been seen on %s",
 817                            hapd->conf->iface, MAC2STR(mgmt->sa),
 818                            hapd->conf->no_probe_resp_if_seen_on);
 819                 return;
 820         }
 821
 822 #ifdef CONFIG_TESTING_OPTIONS
 823         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 824             drand48() < hapd->iconf->ignore_probe_probability) {
 825                 wpa_printf(MSG_INFO,
 826                            "TESTING: ignoring probe request from " MACSTR,
 827                            MAC2STR(mgmt->sa));
 828                 return;
 829         }
 830 #endif /* CONFIG_TESTING_OPTIONS */
 831
 832         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 833                                       &resp_len);
 834         if (resp == NULL)
 835                 return;
 836
 837         /*
 838          * If this is a broadcast probe request, apply no ack policy to avoid
 839          * excessive retries.
 840          */
 841         noack = !!(res == WILDCARD_SSID_MATCH &&
 842                    is_broadcast_ether_addr(mgmt->da));
 843
 844         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 845                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 846
 847         os_free(resp);
 848
 849         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 850                    "SSID", MAC2STR(mgmt->sa),
 851                    elems.ssid_len == 0 ? "broadcast" : "our");
 852 }
 853
 854
 855 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 856                                         size_t *resp_len)
 857 {
 858         /* check probe response offloading caps and print warnings */
 859         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 860                 return NULL;
 861
 862 #ifdef CONFIG_WPS
 863         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 864             (!(hapd->iface->probe_resp_offloads &
 865                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 866                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 867                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 868                            "Probe Response while not supporting this");
 869 #endif /* CONFIG_WPS */
 870
 871 #ifdef CONFIG_P2P
 872         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 873             !(hapd->iface->probe_resp_offloads &
 874               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 875                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 876                            "Probe Response while not supporting this");
 877 #endif  /* CONFIG_P2P */
 878
 879         if (hapd->conf->interworking &&
 880             !(hapd->iface->probe_resp_offloads &
 881               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 882                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 883                            "Interworking Probe Response while not supporting "
 884                            "this");
 885
 886         /* Generate a Probe Response template for the non-P2P case */
 887         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 888 }
 889
 890 #endif /* NEED_AP_MLME */
 891
 892
 893 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 894                                struct wpa_driver_ap_params *params)
 895 {
 896         struct ieee80211_mgmt *head = NULL;
 897         u8 *tail = NULL;
 898         size_t head_len = 0, tail_len = 0;
 899         u8 *resp = NULL;
 900         size_t resp_len = 0;
 901 #ifdef NEED_AP_MLME
 902         u16 capab_info;
 903         u8 *pos, *tailpos;
 904
 905 #define BEACON_HEAD_BUF_SIZE 256
 906 #define BEACON_TAIL_BUF_SIZE 512
 907         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 908         tail_len = BEACON_TAIL_BUF_SIZE;
 909 #ifdef CONFIG_WPS
 910         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 911                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 912 #endif /* CONFIG_WPS */
 913 #ifdef CONFIG_P2P
 914         if (hapd->p2p_beacon_ie)
 915                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 916 #endif /* CONFIG_P2P */
 917 #ifdef CONFIG_FST
 918         if (hapd->iface->fst_ies)
 919                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 920 #endif /* CONFIG_FST */
 921         if (hapd->conf->vendor_elements)
 922                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 923
 924 #ifdef CONFIG_IEEE80211AC
 925         if (hapd->conf->vendor_vht) {
 926                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 927                         2 + sizeof(struct ieee80211_vht_operation);
 928         }
 929 #endif /* CONFIG_IEEE80211AC */
 930
 931         tailpos = tail = os_malloc(tail_len);
 932         if (head == NULL || tail == NULL) {
 933                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 934                 os_free(head);
 935                 os_free(tail);
 936                 return -1;
 937         }
 938
 939         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 940                                            WLAN_FC_STYPE_BEACON);
 941         head->duration = host_to_le16(0);
 942         os_memset(head->da, 0xff, ETH_ALEN);
 943
 944         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 945         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 946         head->u.beacon.beacon_int =
 947                 host_to_le16(hapd->iconf->beacon_int);
 948
 949         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 950         capab_info = hostapd_own_capab_info(hapd);
 951         head->u.beacon.capab_info = host_to_le16(capab_info);
 952         pos = &head->u.beacon.variable[0];
 953
 954         /* SSID */
 955         *pos++ = WLAN_EID_SSID;
 956         if (hapd->conf->ignore_broadcast_ssid == 2) {
 957                 /* clear the data, but keep the correct length of the SSID */
 958                 *pos++ = hapd->conf->ssid.ssid_len;
 959                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 960                 pos += hapd->conf->ssid.ssid_len;
 961         } else if (hapd->conf->ignore_broadcast_ssid) {
 962                 *pos++ = 0; /* empty SSID */
 963         } else {
 964                 *pos++ = hapd->conf->ssid.ssid_len;
 965                 os_memcpy(pos, hapd->conf->ssid.ssid,
 966                           hapd->conf->ssid.ssid_len);
 967                 pos += hapd->conf->ssid.ssid_len;
 968         }
 969
 970         /* Supported rates */
 971         pos = hostapd_eid_supp_rates(hapd, pos);
 972
 973         /* DS Params */
 974         pos = hostapd_eid_ds_params(hapd, pos);
 975
 976         head_len = pos - (u8 *) head;
 977
 978         tailpos = hostapd_eid_country(hapd, tailpos,
 979                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 980
 981         /* Power Constraint element */
 982         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
 983
 984         /* ERP Information element */
 985         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 986
 987         /* Extended supported rates */
 988         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
 989
 990         /* RSN, MDIE, WPA */
 991         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
 992                                   tailpos);
 993
 994         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
 995                                                tail + BEACON_TAIL_BUF_SIZE -
 996                                                tailpos);
 997
 998         tailpos = hostapd_eid_bss_load(hapd, tailpos,
 999                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1000
1001 #ifdef CONFIG_IEEE80211N
1002         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1003         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1004 #endif /* CONFIG_IEEE80211N */
1005
1006         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1007
1008         /*
1009          * TODO: Time Advertisement element should only be included in some
1010          * DTIM Beacon frames.
1011          */
1012         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1013
1014         tailpos = hostapd_eid_interworking(hapd, tailpos);
1015         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1016         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1017         tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
1018                                         &hapd->cs_c_off_beacon);
1019
1020 #ifdef CONFIG_FST
1021         if (hapd->iface->fst_ies) {
1022                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1023                           wpabuf_len(hapd->iface->fst_ies));
1024                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1025         }
1026 #endif /* CONFIG_FST */
1027
1028 #ifdef CONFIG_IEEE80211AC
1029         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1030                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1031                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1032         }
1033         if (hapd->conf->vendor_vht)
1034                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1035 #endif /* CONFIG_IEEE80211AC */
1036
1037         /* Wi-Fi Alliance WMM */
1038         tailpos = hostapd_eid_wmm(hapd, tailpos);
1039
1040 #ifdef CONFIG_WPS
1041         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1042                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1043                           wpabuf_len(hapd->wps_beacon_ie));
1044                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1045         }
1046 #endif /* CONFIG_WPS */
1047
1048 #ifdef CONFIG_P2P
1049         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1050                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1051                           wpabuf_len(hapd->p2p_beacon_ie));
1052                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1053         }
1054 #endif /* CONFIG_P2P */
1055 #ifdef CONFIG_P2P_MANAGER
1056         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1057             P2P_MANAGE)
1058                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1059 #endif /* CONFIG_P2P_MANAGER */
1060
1061 #ifdef CONFIG_HS20
1062         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1063         tailpos = hostapd_eid_osen(hapd, tailpos);
1064 #endif /* CONFIG_HS20 */
1065
1066         if (hapd->conf->vendor_elements) {
1067                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1068                           wpabuf_len(hapd->conf->vendor_elements));
1069                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1070         }
1071
1072         tail_len = tailpos > tail ? tailpos - tail : 0;
1073
1074         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1075 #endif /* NEED_AP_MLME */
1076
1077         os_memset(params, 0, sizeof(*params));
1078         params->head = (u8 *) head;
1079         params->head_len = head_len;
1080         params->tail = tail;
1081         params->tail_len = tail_len;
1082         params->proberesp = resp;
1083         params->proberesp_len = resp_len;
1084         params->dtim_period = hapd->conf->dtim_period;
1085         params->beacon_int = hapd->iconf->beacon_int;
1086         params->basic_rates = hapd->iface->basic_rates;
1087         params->ssid = hapd->conf->ssid.ssid;
1088         params->ssid_len = hapd->conf->ssid.ssid_len;
1089         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1090             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1091                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1092                         hapd->conf->rsn_pairwise;
1093         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1094                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1095         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1096                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1097         params->group_cipher = hapd->conf->wpa_group;
1098         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1099         params->auth_algs = hapd->conf->auth_algs;
1100         params->wpa_version = hapd->conf->wpa;
1101         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1102                 (hapd->conf->ieee802_1x &&
1103                  (hapd->conf->default_wep_key_len ||
1104                   hapd->conf->individual_wep_key_len));
1105         switch (hapd->conf->ignore_broadcast_ssid) {
1106         case 0:
1107                 params->hide_ssid = NO_SSID_HIDING;
1108                 break;
1109         case 1:
1110                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1111                 break;
1112         case 2:
1113                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1114                 break;
1115         }
1116         params->isolate = hapd->conf->isolate;
1117         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1118 #ifdef NEED_AP_MLME
1119         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1120                                 ERP_INFO_USE_PROTECTION);
1121         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1122                 hapd->iconf->preamble == SHORT_PREAMBLE;
1123         if (hapd->iface->current_mode &&
1124             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1125                 params->short_slot_time =
1126                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1127         else
1128                 params->short_slot_time = -1;
1129         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1130                 params->ht_opmode = -1;
1131         else
1132                 params->ht_opmode = hapd->iface->ht_op_mode;
1133 #endif /* NEED_AP_MLME */
1134         params->interworking = hapd->conf->interworking;
1135         if (hapd->conf->interworking &&
1136             !is_zero_ether_addr(hapd->conf->hessid))
1137                 params->hessid = hapd->conf->hessid;
1138         params->access_network_type = hapd->conf->access_network_type;
1139         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1140 #ifdef CONFIG_P2P
1141         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1142 #endif /* CONFIG_P2P */
1143 #ifdef CONFIG_HS20
1144         params->disable_dgaf = hapd->conf->disable_dgaf;
1145         if (hapd->conf->osen) {
1146                 params->privacy = 1;
1147                 params->osen = 1;
1148         }
1149 #endif /* CONFIG_HS20 */
1150         return 0;
1151 }
1152
1153
1154 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1155 {
1156         os_free(params->tail);
1157         params->tail = NULL;
1158         os_free(params->head);
1159         params->head = NULL;
1160         os_free(params->proberesp);
1161         params->proberesp = NULL;
1162 }
1163
1164
1165 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1166 {
1167         struct wpa_driver_ap_params params;
1168         struct hostapd_freq_params freq;
1169         struct hostapd_iface *iface = hapd->iface;
1170         struct hostapd_config *iconf = iface->conf;
1171         struct wpabuf *beacon, *proberesp, *assocresp;
1172         int res, ret = -1;
1173
1174         if (hapd->csa_in_progress) {
1175                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1176                 return -1;
1177         }
1178
1179         hapd->beacon_set_done = 1;
1180
1181         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1182                 return -1;
1183
1184         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1185             0)
1186                 goto fail;
1187
1188         params.beacon_ies = beacon;
1189         params.proberesp_ies = proberesp;
1190         params.assocresp_ies = assocresp;
1191         params.reenable = hapd->reenable_beacon;
1192         hapd->reenable_beacon = 0;
1193
1194         if (iface->current_mode &&
1195             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1196                                     iconf->channel, iconf->ieee80211n,
1197                                     iconf->ieee80211ac,
1198                                     iconf->secondary_channel,
1199                                     iconf->vht_oper_chwidth,
1200                                     iconf->vht_oper_centr_freq_seg0_idx,
1201                                     iconf->vht_oper_centr_freq_seg1_idx,
1202                                     iface->current_mode->vht_capab) == 0)
1203                 params.freq = &freq;
1204
1205         res = hostapd_drv_set_ap(hapd, &params);
1206         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1207         if (res)
1208                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1209         else
1210                 ret = 0;
1211 fail:
1212         ieee802_11_free_ap_params(&params);
1213         return ret;
1214 }
1215
1216
1217 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1218 {
1219         size_t i;
1220         int ret = 0;
1221
1222         for (i = 0; i < iface->num_bss; i++) {
1223                 if (iface->bss[i]->started &&
1224                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1225                         ret = -1;
1226         }
1227
1228         return ret;
1229 }
1230
1231
1232 /* only update beacons if started */
1233 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1234 {
1235         size_t i;
1236         int ret = 0;
1237
1238         for (i = 0; i < iface->num_bss; i++) {
1239                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1240                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1241                         ret = -1;
1242         }
1243
1244         return ret;
1245 }
1246
1247 #endif /* CONFIG_NATIVE_WINDOWS */