libeap/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 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 struct hostapd_data *
 626 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 627                   const char *ifname)
 628 {
 629         struct hapd_interfaces *interfaces = iface->interfaces;
 630         size_t i, j;
 631
 632         for (i = 0; i < interfaces->count; i++) {
 633                 struct hostapd_data *hapd = NULL;
 634
 635                 iface = interfaces->iface[i];
 636                 for (j = 0; j < iface->num_bss; j++) {
 637                         hapd = iface->bss[j];
 638                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 639                                 break;
 640                         hapd = NULL;
 641                 }
 642
 643                 if (hapd && sta_track_get(iface, addr))
 644                         return hapd;
 645         }
 646
 647         return NULL;
 648 }
 649
 650
 651 void handle_probe_req(struct hostapd_data *hapd,
 652                       const struct ieee80211_mgmt *mgmt, size_t len,
 653                       int ssi_signal)
 654 {
 655         u8 *resp;
 656         struct ieee802_11_elems elems;
 657         const u8 *ie;
 658         size_t ie_len;
 659         size_t i, resp_len;
 660         int noack;
 661         enum ssid_match_result res;
 662
 663         ie = mgmt->u.probe_req.variable;
 664         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 665                 return;
 666         if (hapd->iconf->track_sta_max_num)
 667                 sta_track_add(hapd->iface, mgmt->sa);
 668         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 669
 670         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 671                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 672                                             mgmt->sa, mgmt->da, mgmt->bssid,
 673                                             ie, ie_len, ssi_signal) > 0)
 674                         return;
 675
 676         if (!hapd->iconf->send_probe_response)
 677                 return;
 678
 679         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 680                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 681                            MAC2STR(mgmt->sa));
 682                 return;
 683         }
 684
 685         if ((!elems.ssid || !elems.supp_rates)) {
 686                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 687                            "without SSID or supported rates element",
 688                            MAC2STR(mgmt->sa));
 689                 return;
 690         }
 691
 692         /*
 693          * No need to reply if the Probe Request frame was sent on an adjacent
 694          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 695          * AP with dot11RadioMeasurementActivated set to true, but strictly
 696          * speaking does not allow such ignoring of Probe Request frames if
 697          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 698          * number of unnecessary Probe Response frames for cases where the STA
 699          * is less likely to see them (Probe Request frame sent on a
 700          * neighboring, but partially overlapping, channel).
 701          */
 702         if (elems.ds_params &&
 703             hapd->iface->current_mode &&
 704             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 705              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 706             hapd->iconf->channel != elems.ds_params[0]) {
 707                 wpa_printf(MSG_DEBUG,
 708                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 709                            hapd->iconf->channel, elems.ds_params[0]);
 710                 return;
 711         }
 712
 713 #ifdef CONFIG_P2P
 714         if (hapd->p2p && elems.wps_ie) {
 715                 struct wpabuf *wps;
 716                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 717                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 718                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 719                                    "due to mismatch with Requested Device "
 720                                    "Type");
 721                         wpabuf_free(wps);
 722                         return;
 723                 }
 724                 wpabuf_free(wps);
 725         }
 726
 727         if (hapd->p2p && elems.p2p) {
 728                 struct wpabuf *p2p;
 729                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 730                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 731                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 732                                    "due to mismatch with Device ID");
 733                         wpabuf_free(p2p);
 734                         return;
 735                 }
 736                 wpabuf_free(p2p);
 737         }
 738 #endif /* CONFIG_P2P */
 739
 740         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 741             elems.ssid_list_len == 0) {
 742                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 743                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 744                 return;
 745         }
 746
 747 #ifdef CONFIG_P2P
 748         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 749             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 750             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 751                       P2P_WILDCARD_SSID_LEN) == 0) {
 752                 /* Process P2P Wildcard SSID like Wildcard SSID */
 753                 elems.ssid_len = 0;
 754         }
 755 #endif /* CONFIG_P2P */
 756
 757         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 758                          elems.ssid_list, elems.ssid_list_len);
 759         if (res == NO_SSID_MATCH) {
 760                 if (!(mgmt->da[0] & 0x01)) {
 761                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 762                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 763                                    MAC2STR(mgmt->sa),
 764                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 765                                    MAC2STR(mgmt->da),
 766                                    elems.ssid_list ? " (SSID list)" : "");
 767                 }
 768                 return;
 769         }
 770
 771 #ifdef CONFIG_INTERWORKING
 772         if (hapd->conf->interworking &&
 773             elems.interworking && elems.interworking_len >= 1) {
 774                 u8 ant = elems.interworking[0] & 0x0f;
 775                 if (ant != INTERWORKING_ANT_WILDCARD &&
 776                     ant != hapd->conf->access_network_type) {
 777                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 778                                    " for mismatching ANT %u ignored",
 779                                    MAC2STR(mgmt->sa), ant);
 780                         return;
 781                 }
 782         }
 783
 784         if (hapd->conf->interworking && elems.interworking &&
 785             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 786                 const u8 *hessid;
 787                 if (elems.interworking_len == 7)
 788                         hessid = elems.interworking + 1;
 789                 else
 790                         hessid = elems.interworking + 1 + 2;
 791                 if (!is_broadcast_ether_addr(hessid) &&
 792                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 793                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 794                                    " for mismatching HESSID " MACSTR
 795                                    " ignored",
 796                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 797                         return;
 798                 }
 799         }
 800 #endif /* CONFIG_INTERWORKING */
 801
 802 #ifdef CONFIG_P2P
 803         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 804             supp_rates_11b_only(&elems)) {
 805                 /* Indicates support for 11b rates only */
 806                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 807                            MACSTR " with only 802.11b rates",
 808                            MAC2STR(mgmt->sa));
 809                 return;
 810         }
 811 #endif /* CONFIG_P2P */
 812
 813         /* TODO: verify that supp_rates contains at least one matching rate
 814          * with AP configuration */
 815
 816         if (hapd->conf->no_probe_resp_if_seen_on &&
 817             is_multicast_ether_addr(mgmt->da) &&
 818             is_multicast_ether_addr(mgmt->bssid) &&
 819             sta_track_seen_on(hapd->iface, mgmt->sa,
 820                               hapd->conf->no_probe_resp_if_seen_on)) {
 821                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 822                            " since STA has been seen on %s",
 823                            hapd->conf->iface, MAC2STR(mgmt->sa),
 824                            hapd->conf->no_probe_resp_if_seen_on);
 825                 return;
 826         }
 827
 828 #ifdef CONFIG_TESTING_OPTIONS
 829         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 830             drand48() < hapd->iconf->ignore_probe_probability) {
 831                 wpa_printf(MSG_INFO,
 832                            "TESTING: ignoring probe request from " MACSTR,
 833                            MAC2STR(mgmt->sa));
 834                 return;
 835         }
 836 #endif /* CONFIG_TESTING_OPTIONS */
 837
 838         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 839                                       &resp_len);
 840         if (resp == NULL)
 841                 return;
 842
 843         /*
 844          * If this is a broadcast probe request, apply no ack policy to avoid
 845          * excessive retries.
 846          */
 847         noack = !!(res == WILDCARD_SSID_MATCH &&
 848                    is_broadcast_ether_addr(mgmt->da));
 849
 850         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 851                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 852
 853         os_free(resp);
 854
 855         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 856                    "SSID", MAC2STR(mgmt->sa),
 857                    elems.ssid_len == 0 ? "broadcast" : "our");
 858 }
 859
 860
 861 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 862                                         size_t *resp_len)
 863 {
 864         /* check probe response offloading caps and print warnings */
 865         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 866                 return NULL;
 867
 868 #ifdef CONFIG_WPS
 869         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 870             (!(hapd->iface->probe_resp_offloads &
 871                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 872                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 873                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 874                            "Probe Response while not supporting this");
 875 #endif /* CONFIG_WPS */
 876
 877 #ifdef CONFIG_P2P
 878         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 879             !(hapd->iface->probe_resp_offloads &
 880               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 881                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 882                            "Probe Response while not supporting this");
 883 #endif  /* CONFIG_P2P */
 884
 885         if (hapd->conf->interworking &&
 886             !(hapd->iface->probe_resp_offloads &
 887               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 888                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 889                            "Interworking Probe Response while not supporting "
 890                            "this");
 891
 892         /* Generate a Probe Response template for the non-P2P case */
 893         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 894 }
 895
 896 #endif /* NEED_AP_MLME */
 897
 898
 899 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 900                                struct wpa_driver_ap_params *params)
 901 {
 902         struct ieee80211_mgmt *head = NULL;
 903         u8 *tail = NULL;
 904         size_t head_len = 0, tail_len = 0;
 905         u8 *resp = NULL;
 906         size_t resp_len = 0;
 907 #ifdef NEED_AP_MLME
 908         u16 capab_info;
 909         u8 *pos, *tailpos;
 910
 911 #define BEACON_HEAD_BUF_SIZE 256
 912 #define BEACON_TAIL_BUF_SIZE 512
 913         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 914         tail_len = BEACON_TAIL_BUF_SIZE;
 915 #ifdef CONFIG_WPS
 916         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 917                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 918 #endif /* CONFIG_WPS */
 919 #ifdef CONFIG_P2P
 920         if (hapd->p2p_beacon_ie)
 921                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 922 #endif /* CONFIG_P2P */
 923 #ifdef CONFIG_FST
 924         if (hapd->iface->fst_ies)
 925                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 926 #endif /* CONFIG_FST */
 927         if (hapd->conf->vendor_elements)
 928                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 929
 930 #ifdef CONFIG_IEEE80211AC
 931         if (hapd->conf->vendor_vht) {
 932                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 933                         2 + sizeof(struct ieee80211_vht_operation);
 934         }
 935 #endif /* CONFIG_IEEE80211AC */
 936
 937         tailpos = tail = os_malloc(tail_len);
 938         if (head == NULL || tail == NULL) {
 939                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 940                 os_free(head);
 941                 os_free(tail);
 942                 return -1;
 943         }
 944
 945         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 946                                            WLAN_FC_STYPE_BEACON);
 947         head->duration = host_to_le16(0);
 948         os_memset(head->da, 0xff, ETH_ALEN);
 949
 950         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 951         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 952         head->u.beacon.beacon_int =
 953                 host_to_le16(hapd->iconf->beacon_int);
 954
 955         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 956         capab_info = hostapd_own_capab_info(hapd);
 957         head->u.beacon.capab_info = host_to_le16(capab_info);
 958         pos = &head->u.beacon.variable[0];
 959
 960         /* SSID */
 961         *pos++ = WLAN_EID_SSID;
 962         if (hapd->conf->ignore_broadcast_ssid == 2) {
 963                 /* clear the data, but keep the correct length of the SSID */
 964                 *pos++ = hapd->conf->ssid.ssid_len;
 965                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 966                 pos += hapd->conf->ssid.ssid_len;
 967         } else if (hapd->conf->ignore_broadcast_ssid) {
 968                 *pos++ = 0; /* empty SSID */
 969         } else {
 970                 *pos++ = hapd->conf->ssid.ssid_len;
 971                 os_memcpy(pos, hapd->conf->ssid.ssid,
 972                           hapd->conf->ssid.ssid_len);
 973                 pos += hapd->conf->ssid.ssid_len;
 974         }
 975
 976         /* Supported rates */
 977         pos = hostapd_eid_supp_rates(hapd, pos);
 978
 979         /* DS Params */
 980         pos = hostapd_eid_ds_params(hapd, pos);
 981
 982         head_len = pos - (u8 *) head;
 983
 984         tailpos = hostapd_eid_country(hapd, tailpos,
 985                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 986
 987         /* Power Constraint element */
 988         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
 989
 990         /* ERP Information element */
 991         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 992
 993         /* Extended supported rates */
 994         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
 995
 996         /* RSN, MDIE, WPA */
 997         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
 998                                   tailpos);
 999
1000         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1001                                                tail + BEACON_TAIL_BUF_SIZE -
1002                                                tailpos);
1003
1004         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1005                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1006
1007 #ifdef CONFIG_IEEE80211N
1008         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1009         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1010 #endif /* CONFIG_IEEE80211N */
1011
1012         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1013
1014         /*
1015          * TODO: Time Advertisement element should only be included in some
1016          * DTIM Beacon frames.
1017          */
1018         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1019
1020         tailpos = hostapd_eid_interworking(hapd, tailpos);
1021         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1022         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1023         tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
1024                                         &hapd->cs_c_off_beacon);
1025
1026 #ifdef CONFIG_FST
1027         if (hapd->iface->fst_ies) {
1028                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1029                           wpabuf_len(hapd->iface->fst_ies));
1030                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1031         }
1032 #endif /* CONFIG_FST */
1033
1034 #ifdef CONFIG_IEEE80211AC
1035         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1036                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1037                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1038         }
1039         if (hapd->conf->vendor_vht)
1040                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1041 #endif /* CONFIG_IEEE80211AC */
1042
1043         /* Wi-Fi Alliance WMM */
1044         tailpos = hostapd_eid_wmm(hapd, tailpos);
1045
1046 #ifdef CONFIG_WPS
1047         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1048                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1049                           wpabuf_len(hapd->wps_beacon_ie));
1050                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1051         }
1052 #endif /* CONFIG_WPS */
1053
1054 #ifdef CONFIG_P2P
1055         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1056                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1057                           wpabuf_len(hapd->p2p_beacon_ie));
1058                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1059         }
1060 #endif /* CONFIG_P2P */
1061 #ifdef CONFIG_P2P_MANAGER
1062         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1063             P2P_MANAGE)
1064                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1065 #endif /* CONFIG_P2P_MANAGER */
1066
1067 #ifdef CONFIG_HS20
1068         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1069         tailpos = hostapd_eid_osen(hapd, tailpos);
1070 #endif /* CONFIG_HS20 */
1071
1072         if (hapd->conf->vendor_elements) {
1073                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1074                           wpabuf_len(hapd->conf->vendor_elements));
1075                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1076         }
1077
1078         tail_len = tailpos > tail ? tailpos - tail : 0;
1079
1080         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1081 #endif /* NEED_AP_MLME */
1082
1083         os_memset(params, 0, sizeof(*params));
1084         params->head = (u8 *) head;
1085         params->head_len = head_len;
1086         params->tail = tail;
1087         params->tail_len = tail_len;
1088         params->proberesp = resp;
1089         params->proberesp_len = resp_len;
1090         params->dtim_period = hapd->conf->dtim_period;
1091         params->beacon_int = hapd->iconf->beacon_int;
1092         params->basic_rates = hapd->iface->basic_rates;
1093         params->ssid = hapd->conf->ssid.ssid;
1094         params->ssid_len = hapd->conf->ssid.ssid_len;
1095         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1096             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1097                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1098                         hapd->conf->rsn_pairwise;
1099         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1100                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1101         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1102                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1103         params->group_cipher = hapd->conf->wpa_group;
1104         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1105         params->auth_algs = hapd->conf->auth_algs;
1106         params->wpa_version = hapd->conf->wpa;
1107         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1108                 (hapd->conf->ieee802_1x &&
1109                  (hapd->conf->default_wep_key_len ||
1110                   hapd->conf->individual_wep_key_len));
1111         switch (hapd->conf->ignore_broadcast_ssid) {
1112         case 0:
1113                 params->hide_ssid = NO_SSID_HIDING;
1114                 break;
1115         case 1:
1116                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1117                 break;
1118         case 2:
1119                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1120                 break;
1121         }
1122         params->isolate = hapd->conf->isolate;
1123         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1124 #ifdef NEED_AP_MLME
1125         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1126                                 ERP_INFO_USE_PROTECTION);
1127         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1128                 hapd->iconf->preamble == SHORT_PREAMBLE;
1129         if (hapd->iface->current_mode &&
1130             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1131                 params->short_slot_time =
1132                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1133         else
1134                 params->short_slot_time = -1;
1135         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1136                 params->ht_opmode = -1;
1137         else
1138                 params->ht_opmode = hapd->iface->ht_op_mode;
1139 #endif /* NEED_AP_MLME */
1140         params->interworking = hapd->conf->interworking;
1141         if (hapd->conf->interworking &&
1142             !is_zero_ether_addr(hapd->conf->hessid))
1143                 params->hessid = hapd->conf->hessid;
1144         params->access_network_type = hapd->conf->access_network_type;
1145         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1146 #ifdef CONFIG_P2P
1147         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1148 #endif /* CONFIG_P2P */
1149 #ifdef CONFIG_HS20
1150         params->disable_dgaf = hapd->conf->disable_dgaf;
1151         if (hapd->conf->osen) {
1152                 params->privacy = 1;
1153                 params->osen = 1;
1154         }
1155 #endif /* CONFIG_HS20 */
1156         return 0;
1157 }
1158
1159
1160 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1161 {
1162         os_free(params->tail);
1163         params->tail = NULL;
1164         os_free(params->head);
1165         params->head = NULL;
1166         os_free(params->proberesp);
1167         params->proberesp = NULL;
1168 }
1169
1170
1171 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1172 {
1173         struct wpa_driver_ap_params params;
1174         struct hostapd_freq_params freq;
1175         struct hostapd_iface *iface = hapd->iface;
1176         struct hostapd_config *iconf = iface->conf;
1177         struct wpabuf *beacon, *proberesp, *assocresp;
1178         int res, ret = -1;
1179
1180         if (hapd->csa_in_progress) {
1181                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1182                 return -1;
1183         }
1184
1185         hapd->beacon_set_done = 1;
1186
1187         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1188                 return -1;
1189
1190         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1191             0)
1192                 goto fail;
1193
1194         params.beacon_ies = beacon;
1195         params.proberesp_ies = proberesp;
1196         params.assocresp_ies = assocresp;
1197         params.reenable = hapd->reenable_beacon;
1198         hapd->reenable_beacon = 0;
1199
1200         if (iface->current_mode &&
1201             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1202                                     iconf->channel, iconf->ieee80211n,
1203                                     iconf->ieee80211ac,
1204                                     iconf->secondary_channel,
1205                                     iconf->vht_oper_chwidth,
1206                                     iconf->vht_oper_centr_freq_seg0_idx,
1207                                     iconf->vht_oper_centr_freq_seg1_idx,
1208                                     iface->current_mode->vht_capab) == 0)
1209                 params.freq = &freq;
1210
1211         res = hostapd_drv_set_ap(hapd, &params);
1212         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1213         if (res)
1214                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1215         else
1216                 ret = 0;
1217 fail:
1218         ieee802_11_free_ap_params(&params);
1219         return ret;
1220 }
1221
1222
1223 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1224 {
1225         size_t i;
1226         int ret = 0;
1227
1228         for (i = 0; i < iface->num_bss; i++) {
1229                 if (iface->bss[i]->started &&
1230                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1231                         ret = -1;
1232         }
1233
1234         return ret;
1235 }
1236
1237
1238 /* only update beacons if started */
1239 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1240 {
1241         size_t i;
1242         int ret = 0;
1243
1244         for (i = 0; i < iface->num_bss; i++) {
1245                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1246                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1247                         ret = -1;
1248         }
1249
1250         return ret;
1251 }
1252
1253 #endif /* CONFIG_NATIVE_WINDOWS */