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 #include "taxonomy.h"
  33
  34
  35 #ifdef NEED_AP_MLME
  36
  37 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
  38                                          size_t len)
  39 {
  40         size_t i;
  41
  42         for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
  43                 if (hapd->conf->radio_measurements[i])
  44                         break;
  45         }
  46
  47         if (i == RRM_CAPABILITIES_IE_LEN || len < 2 + RRM_CAPABILITIES_IE_LEN)
  48                 return eid;
  49
  50         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  51         *eid++ = RRM_CAPABILITIES_IE_LEN;
  52         os_memcpy(eid, hapd->conf->radio_measurements, RRM_CAPABILITIES_IE_LEN);
  53
  54         return eid + RRM_CAPABILITIES_IE_LEN;
  55 }
  56
  57
  58 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  59 {
  60         if (len < 2 + 5)
  61                 return eid;
  62
  63 #ifdef CONFIG_TESTING_OPTIONS
  64         if (hapd->conf->bss_load_test_set) {
  65                 *eid++ = WLAN_EID_BSS_LOAD;
  66                 *eid++ = 5;
  67                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  68                 eid += 5;
  69                 return eid;
  70         }
  71 #endif /* CONFIG_TESTING_OPTIONS */
  72         if (hapd->conf->bss_load_update_period) {
  73                 *eid++ = WLAN_EID_BSS_LOAD;
  74                 *eid++ = 5;
  75                 WPA_PUT_LE16(eid, hapd->num_sta);
  76                 eid += 2;
  77                 *eid++ = hapd->iface->channel_utilization;
  78                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  79                 eid += 2;
  80         }
  81         return eid;
  82 }
  83
  84
  85 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  86 {
  87         u8 erp = 0;
  88
  89         if (hapd->iface->current_mode == NULL ||
  90             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  91                 return 0;
  92
  93         if (hapd->iface->olbc)
  94                 erp |= ERP_INFO_USE_PROTECTION;
  95         if (hapd->iface->num_sta_non_erp > 0) {
  96                 erp |= ERP_INFO_NON_ERP_PRESENT |
  97                         ERP_INFO_USE_PROTECTION;
  98         }
  99         if (hapd->iface->num_sta_no_short_preamble > 0 ||
 100             hapd->iconf->preamble == LONG_PREAMBLE)
 101                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
 102
 103         return erp;
 104 }
 105
 106
 107 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 108 {
 109         *eid++ = WLAN_EID_DS_PARAMS;
 110         *eid++ = 1;
 111         *eid++ = hapd->iconf->channel;
 112         return eid;
 113 }
 114
 115
 116 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 117 {
 118         if (hapd->iface->current_mode == NULL ||
 119             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 120                 return eid;
 121
 122         /* Set NonERP_present and use_protection bits if there
 123          * are any associated NonERP stations. */
 124         /* TODO: use_protection bit can be set to zero even if
 125          * there are NonERP stations present. This optimization
 126          * might be useful if NonERP stations are "quiet".
 127          * See 802.11g/D6 E-1 for recommended practice.
 128          * In addition, Non ERP present might be set, if AP detects Non ERP
 129          * operation on other APs. */
 130
 131         /* Add ERP Information element */
 132         *eid++ = WLAN_EID_ERP_INFO;
 133         *eid++ = 1;
 134         *eid++ = ieee802_11_erp_info(hapd);
 135
 136         return eid;
 137 }
 138
 139
 140 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 141 {
 142         u8 *pos = eid;
 143         u8 local_pwr_constraint = 0;
 144         int dfs;
 145
 146         if (hapd->iface->current_mode == NULL ||
 147             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 148                 return eid;
 149
 150         /* Let host drivers add this IE if DFS support is offloaded */
 151         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 152                 return eid;
 153
 154         /*
 155          * There is no DFS support and power constraint was not directly
 156          * requested by config option.
 157          */
 158         if (!hapd->iconf->ieee80211h &&
 159             hapd->iconf->local_pwr_constraint == -1)
 160                 return eid;
 161
 162         /* Check if DFS is required by regulatory. */
 163         dfs = hostapd_is_dfs_required(hapd->iface);
 164         if (dfs < 0) {
 165                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 166                            dfs);
 167                 dfs = 0;
 168         }
 169
 170         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 171                 return eid;
 172
 173         /*
 174          * ieee80211h (DFS) is enabled so Power Constraint element shall
 175          * be added when running on DFS channel whenever local_pwr_constraint
 176          * is configured or not. In order to meet regulations when TPC is not
 177          * implemented using a transmit power that is below the legal maximum
 178          * (including any mitigation factor) should help. In this case,
 179          * indicate 3 dB below maximum allowed transmit power.
 180          */
 181         if (hapd->iconf->local_pwr_constraint == -1)
 182                 local_pwr_constraint = 3;
 183
 184         /*
 185          * A STA that is not an AP shall use a transmit power less than or
 186          * equal to the local maximum transmit power level for the channel.
 187          * The local maximum transmit power can be calculated from the formula:
 188          * local max TX pwr = max TX pwr - local pwr constraint
 189          * Where max TX pwr is maximum transmit power level specified for
 190          * channel in Country element and local pwr constraint is specified
 191          * for channel in this Power Constraint element.
 192          */
 193
 194         /* Element ID */
 195         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 196         /* Length */
 197         *pos++ = 1;
 198         /* Local Power Constraint */
 199         if (local_pwr_constraint)
 200                 *pos++ = local_pwr_constraint;
 201         else
 202                 *pos++ = hapd->iconf->local_pwr_constraint;
 203
 204         return pos;
 205 }
 206
 207
 208 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 209                                     struct hostapd_channel_data *start,
 210                                     struct hostapd_channel_data *prev)
 211 {
 212         if (end - pos < 3)
 213                 return pos;
 214
 215         /* first channel number */
 216         *pos++ = start->chan;
 217         /* number of channels */
 218         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 219         /* maximum transmit power level */
 220         *pos++ = start->max_tx_power;
 221
 222         return pos;
 223 }
 224
 225
 226 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 227                                 int max_len)
 228 {
 229         u8 *pos = eid;
 230         u8 *end = eid + max_len;
 231         int i;
 232         struct hostapd_hw_modes *mode;
 233         struct hostapd_channel_data *start, *prev;
 234         int chan_spacing = 1;
 235
 236         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 237             hapd->iface->current_mode == NULL)
 238                 return eid;
 239
 240         *pos++ = WLAN_EID_COUNTRY;
 241         pos++; /* length will be set later */
 242         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 243         pos += 3;
 244
 245         mode = hapd->iface->current_mode;
 246         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 247                 chan_spacing = 4;
 248
 249         start = prev = NULL;
 250         for (i = 0; i < mode->num_channels; i++) {
 251                 struct hostapd_channel_data *chan = &mode->channels[i];
 252                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 253                         continue;
 254                 if (start && prev &&
 255                     prev->chan + chan_spacing == chan->chan &&
 256                     start->max_tx_power == chan->max_tx_power) {
 257                         prev = chan;
 258                         continue; /* can use same entry */
 259                 }
 260
 261                 if (start && prev) {
 262                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 263                                                       start, prev);
 264                         start = NULL;
 265                 }
 266
 267                 /* Start new group */
 268                 start = prev = chan;
 269         }
 270
 271         if (start) {
 272                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 273                                               start, prev);
 274         }
 275
 276         if ((pos - eid) & 1) {
 277                 if (end - pos < 1)
 278                         return eid;
 279                 *pos++ = 0; /* pad for 16-bit alignment */
 280         }
 281
 282         eid[1] = (pos - eid) - 2;
 283
 284         return pos;
 285 }
 286
 287
 288 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 289 {
 290         const u8 *ie;
 291         size_t ielen;
 292
 293         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 294         if (ie == NULL || ielen > len)
 295                 return eid;
 296
 297         os_memcpy(eid, ie, ielen);
 298         return eid + ielen;
 299 }
 300
 301
 302 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 303 {
 304 #ifdef CONFIG_TESTING_OPTIONS
 305         if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
 306                 return eid;
 307 #endif /* CONFIG_TESTING_OPTIONS */
 308
 309         if (!hapd->cs_freq_params.channel)
 310                 return eid;
 311
 312         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 313         *eid++ = 3;
 314         *eid++ = hapd->cs_block_tx;
 315         *eid++ = hapd->cs_freq_params.channel;
 316         *eid++ = hapd->cs_count;
 317
 318         return eid;
 319 }
 320
 321
 322 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 323 {
 324         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 325                 return eid;
 326
 327         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 328         *eid++ = 4;
 329         *eid++ = hapd->cs_block_tx;
 330         *eid++ = hapd->iface->cs_oper_class;
 331         *eid++ = hapd->cs_freq_params.channel;
 332         *eid++ = hapd->cs_count;
 333
 334         return eid;
 335 }
 336
 337
 338 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
 339 {
 340         u8 op_class, channel;
 341
 342         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
 343             !hapd->iface->freq)
 344                 return eid;
 345
 346         if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
 347                                           hapd->iconf->secondary_channel,
 348                                           hapd->iconf->vht_oper_chwidth,
 349                                           &op_class, &channel) ==
 350             NUM_HOSTAPD_MODES)
 351                 return eid;
 352
 353         *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
 354         *eid++ = 2;
 355
 356         /* Current Operating Class */
 357         *eid++ = op_class;
 358
 359         /* TODO: Advertise all the supported operating classes */
 360         *eid++ = 0;
 361
 362         return eid;
 363 }
 364
 365
 366 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 367                                    const struct ieee80211_mgmt *req,
 368                                    int is_p2p, size_t *resp_len)
 369 {
 370         struct ieee80211_mgmt *resp;
 371         u8 *pos, *epos, *csa_pos;
 372         size_t buflen;
 373
 374 #define MAX_PROBERESP_LEN 768
 375         buflen = MAX_PROBERESP_LEN;
 376 #ifdef CONFIG_WPS
 377         if (hapd->wps_probe_resp_ie)
 378                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 379 #endif /* CONFIG_WPS */
 380 #ifdef CONFIG_P2P
 381         if (hapd->p2p_probe_resp_ie)
 382                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 383 #endif /* CONFIG_P2P */
 384 #ifdef CONFIG_FST
 385         if (hapd->iface->fst_ies)
 386                 buflen += wpabuf_len(hapd->iface->fst_ies);
 387 #endif /* CONFIG_FST */
 388         if (hapd->conf->vendor_elements)
 389                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 390         if (hapd->conf->vendor_vht) {
 391                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 392                         2 + sizeof(struct ieee80211_vht_operation);
 393         }
 394
 395         buflen += hostapd_mbo_ie_len(hapd);
 396
 397         resp = os_zalloc(buflen);
 398         if (resp == NULL)
 399                 return NULL;
 400
 401         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 402
 403         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 404                                            WLAN_FC_STYPE_PROBE_RESP);
 405         if (req)
 406                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 407         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 408
 409         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 410         resp->u.probe_resp.beacon_int =
 411                 host_to_le16(hapd->iconf->beacon_int);
 412
 413         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 414         resp->u.probe_resp.capab_info =
 415                 host_to_le16(hostapd_own_capab_info(hapd));
 416
 417         pos = resp->u.probe_resp.variable;
 418         *pos++ = WLAN_EID_SSID;
 419         *pos++ = hapd->conf->ssid.ssid_len;
 420         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 421         pos += hapd->conf->ssid.ssid_len;
 422
 423         /* Supported rates */
 424         pos = hostapd_eid_supp_rates(hapd, pos);
 425
 426         /* DS Params */
 427         pos = hostapd_eid_ds_params(hapd, pos);
 428
 429         pos = hostapd_eid_country(hapd, pos, epos - pos);
 430
 431         /* Power Constraint element */
 432         pos = hostapd_eid_pwr_constraint(hapd, pos);
 433
 434         /* CSA IE */
 435         csa_pos = hostapd_eid_csa(hapd, pos);
 436         if (csa_pos != pos)
 437                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 438         pos = csa_pos;
 439
 440         /* ERP Information element */
 441         pos = hostapd_eid_erp_info(hapd, pos);
 442
 443         /* Extended supported rates */
 444         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 445
 446         /* RSN, MDIE, WPA */
 447         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 448
 449         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 450
 451         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 452
 453         /* eCSA IE */
 454         csa_pos = hostapd_eid_ecsa(hapd, pos);
 455         if (csa_pos != pos)
 456                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 457         pos = csa_pos;
 458
 459         pos = hostapd_eid_supported_op_classes(hapd, pos);
 460
 461 #ifdef CONFIG_IEEE80211N
 462         /* Secondary Channel Offset element */
 463         /* TODO: The standard doesn't specify a position for this element. */
 464         pos = hostapd_eid_secondary_channel(hapd, pos);
 465
 466         pos = hostapd_eid_ht_capabilities(hapd, pos);
 467         pos = hostapd_eid_ht_operation(hapd, pos);
 468 #endif /* CONFIG_IEEE80211N */
 469
 470         pos = hostapd_eid_ext_capab(hapd, pos);
 471
 472         pos = hostapd_eid_time_adv(hapd, pos);
 473         pos = hostapd_eid_time_zone(hapd, pos);
 474
 475         pos = hostapd_eid_interworking(hapd, pos);
 476         pos = hostapd_eid_adv_proto(hapd, pos);
 477         pos = hostapd_eid_roaming_consortium(hapd, pos);
 478
 479 #ifdef CONFIG_FST
 480         if (hapd->iface->fst_ies) {
 481                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 482                           wpabuf_len(hapd->iface->fst_ies));
 483                 pos += wpabuf_len(hapd->iface->fst_ies);
 484         }
 485 #endif /* CONFIG_FST */
 486
 487 #ifdef CONFIG_IEEE80211AC
 488         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 489                 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
 490                 pos = hostapd_eid_vht_operation(hapd, pos);
 491                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 492                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 493         }
 494         if (hapd->conf->vendor_vht)
 495                 pos = hostapd_eid_vendor_vht(hapd, pos);
 496 #endif /* CONFIG_IEEE80211AC */
 497
 498         /* Wi-Fi Alliance WMM */
 499         pos = hostapd_eid_wmm(hapd, pos);
 500
 501 #ifdef CONFIG_WPS
 502         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 503                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 504                           wpabuf_len(hapd->wps_probe_resp_ie));
 505                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 506         }
 507 #endif /* CONFIG_WPS */
 508
 509 #ifdef CONFIG_P2P
 510         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 511             hapd->p2p_probe_resp_ie) {
 512                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 513                           wpabuf_len(hapd->p2p_probe_resp_ie));
 514                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 515         }
 516 #endif /* CONFIG_P2P */
 517 #ifdef CONFIG_P2P_MANAGER
 518         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 519             P2P_MANAGE)
 520                 pos = hostapd_eid_p2p_manage(hapd, pos);
 521 #endif /* CONFIG_P2P_MANAGER */
 522
 523 #ifdef CONFIG_HS20
 524         pos = hostapd_eid_hs20_indication(hapd, pos);
 525         pos = hostapd_eid_osen(hapd, pos);
 526 #endif /* CONFIG_HS20 */
 527
 528         pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 529
 530         if (hapd->conf->vendor_elements) {
 531                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 532                           wpabuf_len(hapd->conf->vendor_elements));
 533                 pos += wpabuf_len(hapd->conf->vendor_elements);
 534         }
 535
 536         *resp_len = pos - (u8 *) resp;
 537         return (u8 *) resp;
 538 }
 539
 540
 541 enum ssid_match_result {
 542         NO_SSID_MATCH,
 543         EXACT_SSID_MATCH,
 544         WILDCARD_SSID_MATCH
 545 };
 546
 547 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 548                                          const u8 *ssid, size_t ssid_len,
 549                                          const u8 *ssid_list,
 550                                          size_t ssid_list_len)
 551 {
 552         const u8 *pos, *end;
 553         int wildcard = 0;
 554
 555         if (ssid_len == 0)
 556                 wildcard = 1;
 557         if (ssid_len == hapd->conf->ssid.ssid_len &&
 558             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 559                 return EXACT_SSID_MATCH;
 560
 561         if (ssid_list == NULL)
 562                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 563
 564         pos = ssid_list;
 565         end = ssid_list + ssid_list_len;
 566         while (end - pos >= 1) {
 567                 if (2 + pos[1] > end - pos)
 568                         break;
 569                 if (pos[1] == 0)
 570                         wildcard = 1;
 571                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 572                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 573                         return EXACT_SSID_MATCH;
 574                 pos += 2 + pos[1];
 575         }
 576
 577         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 578 }
 579
 580
 581 void sta_track_expire(struct hostapd_iface *iface, int force)
 582 {
 583         struct os_reltime now;
 584         struct hostapd_sta_info *info;
 585
 586         if (!iface->num_sta_seen)
 587                 return;
 588
 589         os_get_reltime(&now);
 590         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 591                                      list))) {
 592                 if (!force &&
 593                     !os_reltime_expired(&now, &info->last_seen,
 594                                         iface->conf->track_sta_max_age))
 595                         break;
 596                 force = 0;
 597
 598                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 599                            MACSTR, iface->bss[0]->conf->iface,
 600                            MAC2STR(info->addr));
 601                 dl_list_del(&info->list);
 602                 iface->num_sta_seen--;
 603                 sta_track_del(info);
 604         }
 605 }
 606
 607
 608 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 609                                                const u8 *addr)
 610 {
 611         struct hostapd_sta_info *info;
 612
 613         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 614                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 615                         return info;
 616
 617         return NULL;
 618 }
 619
 620
 621 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 622 {
 623         struct hostapd_sta_info *info;
 624
 625         info = sta_track_get(iface, addr);
 626         if (info) {
 627                 /* Move the most recent entry to the end of the list */
 628                 dl_list_del(&info->list);
 629                 dl_list_add_tail(&iface->sta_seen, &info->list);
 630                 os_get_reltime(&info->last_seen);
 631                 return;
 632         }
 633
 634         /* Add a new entry */
 635         info = os_zalloc(sizeof(*info));
 636         if (info == NULL)
 637                 return;
 638         os_memcpy(info->addr, addr, ETH_ALEN);
 639         os_get_reltime(&info->last_seen);
 640
 641         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 642                 /* Expire oldest entry to make room for a new one */
 643                 sta_track_expire(iface, 1);
 644         }
 645
 646         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 647                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 648         dl_list_add_tail(&iface->sta_seen, &info->list);
 649         iface->num_sta_seen++;
 650 }
 651
 652
 653 struct hostapd_data *
 654 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 655                   const char *ifname)
 656 {
 657         struct hapd_interfaces *interfaces = iface->interfaces;
 658         size_t i, j;
 659
 660         for (i = 0; i < interfaces->count; i++) {
 661                 struct hostapd_data *hapd = NULL;
 662
 663                 iface = interfaces->iface[i];
 664                 for (j = 0; j < iface->num_bss; j++) {
 665                         hapd = iface->bss[j];
 666                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 667                                 break;
 668                         hapd = NULL;
 669                 }
 670
 671                 if (hapd && sta_track_get(iface, addr))
 672                         return hapd;
 673         }
 674
 675         return NULL;
 676 }
 677
 678
 679 #ifdef CONFIG_TAXONOMY
 680 void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr,
 681                                    struct wpabuf **probe_ie_taxonomy)
 682 {
 683         struct hostapd_sta_info *info;
 684
 685         info = sta_track_get(iface, addr);
 686         if (!info)
 687                 return;
 688
 689         wpabuf_free(*probe_ie_taxonomy);
 690         *probe_ie_taxonomy = info->probe_ie_taxonomy;
 691         info->probe_ie_taxonomy = NULL;
 692 }
 693 #endif /* CONFIG_TAXONOMY */
 694
 695
 696 void handle_probe_req(struct hostapd_data *hapd,
 697                       const struct ieee80211_mgmt *mgmt, size_t len,
 698                       int ssi_signal)
 699 {
 700         u8 *resp;
 701         struct ieee802_11_elems elems;
 702         const u8 *ie;
 703         size_t ie_len;
 704         size_t i, resp_len;
 705         int noack;
 706         enum ssid_match_result res;
 707         int ret;
 708         u16 csa_offs[2];
 709         size_t csa_offs_len;
 710
 711         if (len < IEEE80211_HDRLEN)
 712                 return;
 713         ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
 714         if (hapd->iconf->track_sta_max_num)
 715                 sta_track_add(hapd->iface, mgmt->sa);
 716         ie_len = len - IEEE80211_HDRLEN;
 717
 718         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 719                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 720                                             mgmt->sa, mgmt->da, mgmt->bssid,
 721                                             ie, ie_len, ssi_signal) > 0)
 722                         return;
 723
 724         if (!hapd->iconf->send_probe_response)
 725                 return;
 726
 727         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 728                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 729                            MAC2STR(mgmt->sa));
 730                 return;
 731         }
 732
 733         if ((!elems.ssid || !elems.supp_rates)) {
 734                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 735                            "without SSID or supported rates element",
 736                            MAC2STR(mgmt->sa));
 737                 return;
 738         }
 739
 740         /*
 741          * No need to reply if the Probe Request frame was sent on an adjacent
 742          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 743          * AP with dot11RadioMeasurementActivated set to true, but strictly
 744          * speaking does not allow such ignoring of Probe Request frames if
 745          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 746          * number of unnecessary Probe Response frames for cases where the STA
 747          * is less likely to see them (Probe Request frame sent on a
 748          * neighboring, but partially overlapping, channel).
 749          */
 750         if (elems.ds_params &&
 751             hapd->iface->current_mode &&
 752             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 753              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 754             hapd->iconf->channel != elems.ds_params[0]) {
 755                 wpa_printf(MSG_DEBUG,
 756                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 757                            hapd->iconf->channel, elems.ds_params[0]);
 758                 return;
 759         }
 760
 761 #ifdef CONFIG_P2P
 762         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 763                 struct wpabuf *wps;
 764                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 765                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 766                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 767                                    "due to mismatch with Requested Device "
 768                                    "Type");
 769                         wpabuf_free(wps);
 770                         return;
 771                 }
 772                 wpabuf_free(wps);
 773         }
 774
 775         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 776                 struct wpabuf *p2p;
 777                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 778                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 779                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 780                                    "due to mismatch with Device ID");
 781                         wpabuf_free(p2p);
 782                         return;
 783                 }
 784                 wpabuf_free(p2p);
 785         }
 786 #endif /* CONFIG_P2P */
 787
 788         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 789             elems.ssid_list_len == 0) {
 790                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 791                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 792                 return;
 793         }
 794
 795 #ifdef CONFIG_P2P
 796         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 797             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 798             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 799                       P2P_WILDCARD_SSID_LEN) == 0) {
 800                 /* Process P2P Wildcard SSID like Wildcard SSID */
 801                 elems.ssid_len = 0;
 802         }
 803 #endif /* CONFIG_P2P */
 804
 805 #ifdef CONFIG_TAXONOMY
 806         {
 807                 struct sta_info *sta;
 808                 struct hostapd_sta_info *info;
 809
 810                 if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) {
 811                         taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len);
 812                 } else if ((info = sta_track_get(hapd->iface,
 813                                                  mgmt->sa)) != NULL) {
 814                         taxonomy_hostapd_sta_info_probe_req(hapd, info,
 815                                                             ie, ie_len);
 816                 }
 817         }
 818 #endif /* CONFIG_TAXONOMY */
 819
 820         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 821                          elems.ssid_list, elems.ssid_list_len);
 822         if (res == NO_SSID_MATCH) {
 823                 if (!(mgmt->da[0] & 0x01)) {
 824                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 825                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 826                                    MAC2STR(mgmt->sa),
 827                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 828                                    MAC2STR(mgmt->da),
 829                                    elems.ssid_list ? " (SSID list)" : "");
 830                 }
 831                 return;
 832         }
 833
 834 #ifdef CONFIG_INTERWORKING
 835         if (hapd->conf->interworking &&
 836             elems.interworking && elems.interworking_len >= 1) {
 837                 u8 ant = elems.interworking[0] & 0x0f;
 838                 if (ant != INTERWORKING_ANT_WILDCARD &&
 839                     ant != hapd->conf->access_network_type) {
 840                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 841                                    " for mismatching ANT %u ignored",
 842                                    MAC2STR(mgmt->sa), ant);
 843                         return;
 844                 }
 845         }
 846
 847         if (hapd->conf->interworking && elems.interworking &&
 848             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 849                 const u8 *hessid;
 850                 if (elems.interworking_len == 7)
 851                         hessid = elems.interworking + 1;
 852                 else
 853                         hessid = elems.interworking + 1 + 2;
 854                 if (!is_broadcast_ether_addr(hessid) &&
 855                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 856                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 857                                    " for mismatching HESSID " MACSTR
 858                                    " ignored",
 859                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 860                         return;
 861                 }
 862         }
 863 #endif /* CONFIG_INTERWORKING */
 864
 865 #ifdef CONFIG_P2P
 866         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 867             supp_rates_11b_only(&elems)) {
 868                 /* Indicates support for 11b rates only */
 869                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 870                            MACSTR " with only 802.11b rates",
 871                            MAC2STR(mgmt->sa));
 872                 return;
 873         }
 874 #endif /* CONFIG_P2P */
 875
 876         /* TODO: verify that supp_rates contains at least one matching rate
 877          * with AP configuration */
 878
 879         if (hapd->conf->no_probe_resp_if_seen_on &&
 880             is_multicast_ether_addr(mgmt->da) &&
 881             is_multicast_ether_addr(mgmt->bssid) &&
 882             sta_track_seen_on(hapd->iface, mgmt->sa,
 883                               hapd->conf->no_probe_resp_if_seen_on)) {
 884                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 885                            " since STA has been seen on %s",
 886                            hapd->conf->iface, MAC2STR(mgmt->sa),
 887                            hapd->conf->no_probe_resp_if_seen_on);
 888                 return;
 889         }
 890
 891         if (hapd->conf->no_probe_resp_if_max_sta &&
 892             is_multicast_ether_addr(mgmt->da) &&
 893             is_multicast_ether_addr(mgmt->bssid) &&
 894             hapd->num_sta >= hapd->conf->max_num_sta &&
 895             !ap_get_sta(hapd, mgmt->sa)) {
 896                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 897                            " since no room for additional STA",
 898                            hapd->conf->iface, MAC2STR(mgmt->sa));
 899                 return;
 900         }
 901
 902 #ifdef CONFIG_TESTING_OPTIONS
 903         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 904             drand48() < hapd->iconf->ignore_probe_probability) {
 905                 wpa_printf(MSG_INFO,
 906                            "TESTING: ignoring probe request from " MACSTR,
 907                            MAC2STR(mgmt->sa));
 908                 return;
 909         }
 910 #endif /* CONFIG_TESTING_OPTIONS */
 911
 912         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 913                                       &resp_len);
 914         if (resp == NULL)
 915                 return;
 916
 917         /*
 918          * If this is a broadcast probe request, apply no ack policy to avoid
 919          * excessive retries.
 920          */
 921         noack = !!(res == WILDCARD_SSID_MATCH &&
 922                    is_broadcast_ether_addr(mgmt->da));
 923
 924         csa_offs_len = 0;
 925         if (hapd->csa_in_progress) {
 926                 if (hapd->cs_c_off_proberesp)
 927                         csa_offs[csa_offs_len++] =
 928                                 hapd->cs_c_off_proberesp;
 929
 930                 if (hapd->cs_c_off_ecsa_proberesp)
 931                         csa_offs[csa_offs_len++] =
 932                                 hapd->cs_c_off_ecsa_proberesp;
 933         }
 934
 935         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 936                                         csa_offs_len ? csa_offs : NULL,
 937                                         csa_offs_len);
 938
 939         if (ret < 0)
 940                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 941
 942         os_free(resp);
 943
 944         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 945                    "SSID", MAC2STR(mgmt->sa),
 946                    elems.ssid_len == 0 ? "broadcast" : "our");
 947 }
 948
 949
 950 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 951                                         size_t *resp_len)
 952 {
 953         /* check probe response offloading caps and print warnings */
 954         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 955                 return NULL;
 956
 957 #ifdef CONFIG_WPS
 958         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 959             (!(hapd->iface->probe_resp_offloads &
 960                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 961                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 962                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 963                            "Probe Response while not supporting this");
 964 #endif /* CONFIG_WPS */
 965
 966 #ifdef CONFIG_P2P
 967         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 968             !(hapd->iface->probe_resp_offloads &
 969               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 970                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 971                            "Probe Response while not supporting this");
 972 #endif  /* CONFIG_P2P */
 973
 974         if (hapd->conf->interworking &&
 975             !(hapd->iface->probe_resp_offloads &
 976               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 977                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 978                            "Interworking Probe Response while not supporting "
 979                            "this");
 980
 981         /* Generate a Probe Response template for the non-P2P case */
 982         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 983 }
 984
 985 #endif /* NEED_AP_MLME */
 986
 987
 988 void sta_track_del(struct hostapd_sta_info *info)
 989 {
 990 #ifdef CONFIG_TAXONOMY
 991         wpabuf_free(info->probe_ie_taxonomy);
 992         info->probe_ie_taxonomy = NULL;
 993 #endif /* CONFIG_TAXONOMY */
 994         os_free(info);
 995 }
 996
 997
 998 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 999                                struct wpa_driver_ap_params *params)
1000 {
1001         struct ieee80211_mgmt *head = NULL;
1002         u8 *tail = NULL;
1003         size_t head_len = 0, tail_len = 0;
1004         u8 *resp = NULL;
1005         size_t resp_len = 0;
1006 #ifdef NEED_AP_MLME
1007         u16 capab_info;
1008         u8 *pos, *tailpos, *csa_pos;
1009
1010 #define BEACON_HEAD_BUF_SIZE 256
1011 #define BEACON_TAIL_BUF_SIZE 512
1012         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
1013         tail_len = BEACON_TAIL_BUF_SIZE;
1014 #ifdef CONFIG_WPS
1015         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
1016                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
1017 #endif /* CONFIG_WPS */
1018 #ifdef CONFIG_P2P
1019         if (hapd->p2p_beacon_ie)
1020                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
1021 #endif /* CONFIG_P2P */
1022 #ifdef CONFIG_FST
1023         if (hapd->iface->fst_ies)
1024                 tail_len += wpabuf_len(hapd->iface->fst_ies);
1025 #endif /* CONFIG_FST */
1026         if (hapd->conf->vendor_elements)
1027                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
1028
1029 #ifdef CONFIG_IEEE80211AC
1030         if (hapd->conf->vendor_vht) {
1031                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
1032                         2 + sizeof(struct ieee80211_vht_operation);
1033         }
1034 #endif /* CONFIG_IEEE80211AC */
1035
1036         tail_len += hostapd_mbo_ie_len(hapd);
1037
1038         tailpos = tail = os_malloc(tail_len);
1039         if (head == NULL || tail == NULL) {
1040                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
1041                 os_free(head);
1042                 os_free(tail);
1043                 return -1;
1044         }
1045
1046         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1047                                            WLAN_FC_STYPE_BEACON);
1048         head->duration = host_to_le16(0);
1049         os_memset(head->da, 0xff, ETH_ALEN);
1050
1051         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1052         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1053         head->u.beacon.beacon_int =
1054                 host_to_le16(hapd->iconf->beacon_int);
1055
1056         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1057         capab_info = hostapd_own_capab_info(hapd);
1058         head->u.beacon.capab_info = host_to_le16(capab_info);
1059         pos = &head->u.beacon.variable[0];
1060
1061         /* SSID */
1062         *pos++ = WLAN_EID_SSID;
1063         if (hapd->conf->ignore_broadcast_ssid == 2) {
1064                 /* clear the data, but keep the correct length of the SSID */
1065                 *pos++ = hapd->conf->ssid.ssid_len;
1066                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1067                 pos += hapd->conf->ssid.ssid_len;
1068         } else if (hapd->conf->ignore_broadcast_ssid) {
1069                 *pos++ = 0; /* empty SSID */
1070         } else {
1071                 *pos++ = hapd->conf->ssid.ssid_len;
1072                 os_memcpy(pos, hapd->conf->ssid.ssid,
1073                           hapd->conf->ssid.ssid_len);
1074                 pos += hapd->conf->ssid.ssid_len;
1075         }
1076
1077         /* Supported rates */
1078         pos = hostapd_eid_supp_rates(hapd, pos);
1079
1080         /* DS Params */
1081         pos = hostapd_eid_ds_params(hapd, pos);
1082
1083         head_len = pos - (u8 *) head;
1084
1085         tailpos = hostapd_eid_country(hapd, tailpos,
1086                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1087
1088         /* Power Constraint element */
1089         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1090
1091         /* CSA IE */
1092         csa_pos = hostapd_eid_csa(hapd, tailpos);
1093         if (csa_pos != tailpos)
1094                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1095         tailpos = csa_pos;
1096
1097         /* ERP Information element */
1098         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1099
1100         /* Extended supported rates */
1101         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1102
1103         /* RSN, MDIE, WPA */
1104         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1105                                   tailpos);
1106
1107         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1108                                                tail + BEACON_TAIL_BUF_SIZE -
1109                                                tailpos);
1110
1111         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1112                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1113
1114         /* eCSA IE */
1115         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1116         if (csa_pos != tailpos)
1117                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1118         tailpos = csa_pos;
1119
1120         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1121
1122 #ifdef CONFIG_IEEE80211N
1123         /* Secondary Channel Offset element */
1124         /* TODO: The standard doesn't specify a position for this element. */
1125         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1126
1127         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1128         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1129 #endif /* CONFIG_IEEE80211N */
1130
1131         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1132
1133         /*
1134          * TODO: Time Advertisement element should only be included in some
1135          * DTIM Beacon frames.
1136          */
1137         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1138
1139         tailpos = hostapd_eid_interworking(hapd, tailpos);
1140         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1141         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1142
1143 #ifdef CONFIG_FST
1144         if (hapd->iface->fst_ies) {
1145                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1146                           wpabuf_len(hapd->iface->fst_ies));
1147                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1148         }
1149 #endif /* CONFIG_FST */
1150
1151 #ifdef CONFIG_IEEE80211AC
1152         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1153                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1154                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1155                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1156                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1157         }
1158         if (hapd->conf->vendor_vht)
1159                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1160 #endif /* CONFIG_IEEE80211AC */
1161
1162         /* Wi-Fi Alliance WMM */
1163         tailpos = hostapd_eid_wmm(hapd, tailpos);
1164
1165 #ifdef CONFIG_WPS
1166         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1167                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1168                           wpabuf_len(hapd->wps_beacon_ie));
1169                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1170         }
1171 #endif /* CONFIG_WPS */
1172
1173 #ifdef CONFIG_P2P
1174         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1175                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1176                           wpabuf_len(hapd->p2p_beacon_ie));
1177                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1178         }
1179 #endif /* CONFIG_P2P */
1180 #ifdef CONFIG_P2P_MANAGER
1181         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1182             P2P_MANAGE)
1183                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1184 #endif /* CONFIG_P2P_MANAGER */
1185
1186 #ifdef CONFIG_HS20
1187         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1188         tailpos = hostapd_eid_osen(hapd, tailpos);
1189 #endif /* CONFIG_HS20 */
1190
1191         tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1192
1193         if (hapd->conf->vendor_elements) {
1194                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1195                           wpabuf_len(hapd->conf->vendor_elements));
1196                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1197         }
1198
1199         tail_len = tailpos > tail ? tailpos - tail : 0;
1200
1201         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1202 #endif /* NEED_AP_MLME */
1203
1204         os_memset(params, 0, sizeof(*params));
1205         params->head = (u8 *) head;
1206         params->head_len = head_len;
1207         params->tail = tail;
1208         params->tail_len = tail_len;
1209         params->proberesp = resp;
1210         params->proberesp_len = resp_len;
1211         params->dtim_period = hapd->conf->dtim_period;
1212         params->beacon_int = hapd->iconf->beacon_int;
1213         params->basic_rates = hapd->iface->basic_rates;
1214         params->ssid = hapd->conf->ssid.ssid;
1215         params->ssid_len = hapd->conf->ssid.ssid_len;
1216         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1217             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1218                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1219                         hapd->conf->rsn_pairwise;
1220         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1221                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1222         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1223                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1224         params->group_cipher = hapd->conf->wpa_group;
1225         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1226         params->auth_algs = hapd->conf->auth_algs;
1227         params->wpa_version = hapd->conf->wpa;
1228         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1229                 (hapd->conf->ieee802_1x &&
1230                  (hapd->conf->default_wep_key_len ||
1231                   hapd->conf->individual_wep_key_len));
1232         switch (hapd->conf->ignore_broadcast_ssid) {
1233         case 0:
1234                 params->hide_ssid = NO_SSID_HIDING;
1235                 break;
1236         case 1:
1237                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1238                 break;
1239         case 2:
1240                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1241                 break;
1242         }
1243         params->isolate = hapd->conf->isolate;
1244         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1245 #ifdef NEED_AP_MLME
1246         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1247                                 ERP_INFO_USE_PROTECTION);
1248         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1249                 hapd->iconf->preamble == SHORT_PREAMBLE;
1250         if (hapd->iface->current_mode &&
1251             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1252                 params->short_slot_time =
1253                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1254         else
1255                 params->short_slot_time = -1;
1256         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1257                 params->ht_opmode = -1;
1258         else
1259                 params->ht_opmode = hapd->iface->ht_op_mode;
1260 #endif /* NEED_AP_MLME */
1261         params->interworking = hapd->conf->interworking;
1262         if (hapd->conf->interworking &&
1263             !is_zero_ether_addr(hapd->conf->hessid))
1264                 params->hessid = hapd->conf->hessid;
1265         params->access_network_type = hapd->conf->access_network_type;
1266         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1267 #ifdef CONFIG_P2P
1268         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1269 #endif /* CONFIG_P2P */
1270 #ifdef CONFIG_HS20
1271         params->disable_dgaf = hapd->conf->disable_dgaf;
1272         if (hapd->conf->osen) {
1273                 params->privacy = 1;
1274                 params->osen = 1;
1275         }
1276 #endif /* CONFIG_HS20 */
1277         params->pbss = hapd->conf->pbss;
1278         return 0;
1279 }
1280
1281
1282 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1283 {
1284         os_free(params->tail);
1285         params->tail = NULL;
1286         os_free(params->head);
1287         params->head = NULL;
1288         os_free(params->proberesp);
1289         params->proberesp = NULL;
1290 }
1291
1292
1293 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1294 {
1295         struct wpa_driver_ap_params params;
1296         struct hostapd_freq_params freq;
1297         struct hostapd_iface *iface = hapd->iface;
1298         struct hostapd_config *iconf = iface->conf;
1299         struct wpabuf *beacon, *proberesp, *assocresp;
1300         int res, ret = -1;
1301
1302         if (hapd->csa_in_progress) {
1303                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1304                 return -1;
1305         }
1306
1307         hapd->beacon_set_done = 1;
1308
1309         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1310                 return -1;
1311
1312         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1313             0)
1314                 goto fail;
1315
1316         params.beacon_ies = beacon;
1317         params.proberesp_ies = proberesp;
1318         params.assocresp_ies = assocresp;
1319         params.reenable = hapd->reenable_beacon;
1320         hapd->reenable_beacon = 0;
1321
1322         if (iface->current_mode &&
1323             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1324                                     iconf->channel, iconf->ieee80211n,
1325                                     iconf->ieee80211ac,
1326                                     iconf->secondary_channel,
1327                                     iconf->vht_oper_chwidth,
1328                                     iconf->vht_oper_centr_freq_seg0_idx,
1329                                     iconf->vht_oper_centr_freq_seg1_idx,
1330                                     iface->current_mode->vht_capab) == 0)
1331                 params.freq = &freq;
1332
1333         res = hostapd_drv_set_ap(hapd, &params);
1334         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1335         if (res)
1336                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1337         else
1338                 ret = 0;
1339 fail:
1340         ieee802_11_free_ap_params(&params);
1341         return ret;
1342 }
1343
1344
1345 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1346 {
1347         size_t i;
1348         int ret = 0;
1349
1350         for (i = 0; i < iface->num_bss; i++) {
1351                 if (iface->bss[i]->started &&
1352                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1353                         ret = -1;
1354         }
1355
1356         return ret;
1357 }
1358
1359
1360 /* only update beacons if started */
1361 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1362 {
1363         size_t i;
1364         int ret = 0;
1365
1366         for (i = 0; i < iface->num_bss; i++) {
1367                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1368                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1369                         ret = -1;
1370         }
1371
1372         return ret;
1373 }
1374
1375 #endif /* CONFIG_NATIVE_WINDOWS */