contrib/wpa_supplicant/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 "common/wpa_ctrl.h"
  20 #include "wps/wps_defs.h"
  21 #include "p2p/p2p.h"
  22 #include "hostapd.h"
  23 #include "ieee802_11.h"
  24 #include "wpa_auth.h"
  25 #include "wmm.h"
  26 #include "ap_config.h"
  27 #include "sta_info.h"
  28 #include "p2p_hostapd.h"
  29 #include "ap_drv_ops.h"
  30 #include "beacon.h"
  31 #include "hs20.h"
  32 #include "dfs.h"
  33 #include "taxonomy.h"
  34 #include "ieee802_11_auth.h"
  35
  36
  37 #ifdef NEED_AP_MLME
  38
  39 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
  40                                          size_t len)
  41 {
  42         size_t i;
  43
  44         for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
  45                 if (hapd->conf->radio_measurements[i])
  46                         break;
  47         }
  48
  49         if (i == RRM_CAPABILITIES_IE_LEN || len < 2 + RRM_CAPABILITIES_IE_LEN)
  50                 return eid;
  51
  52         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  53         *eid++ = RRM_CAPABILITIES_IE_LEN;
  54         os_memcpy(eid, hapd->conf->radio_measurements, RRM_CAPABILITIES_IE_LEN);
  55
  56         return eid + RRM_CAPABILITIES_IE_LEN;
  57 }
  58
  59
  60 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  61 {
  62         if (len < 2 + 5)
  63                 return eid;
  64
  65 #ifdef CONFIG_TESTING_OPTIONS
  66         if (hapd->conf->bss_load_test_set) {
  67                 *eid++ = WLAN_EID_BSS_LOAD;
  68                 *eid++ = 5;
  69                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  70                 eid += 5;
  71                 return eid;
  72         }
  73 #endif /* CONFIG_TESTING_OPTIONS */
  74         if (hapd->conf->bss_load_update_period) {
  75                 *eid++ = WLAN_EID_BSS_LOAD;
  76                 *eid++ = 5;
  77                 WPA_PUT_LE16(eid, hapd->num_sta);
  78                 eid += 2;
  79                 *eid++ = hapd->iface->channel_utilization;
  80                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  81                 eid += 2;
  82         }
  83         return eid;
  84 }
  85
  86
  87 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  88 {
  89         u8 erp = 0;
  90
  91         if (hapd->iface->current_mode == NULL ||
  92             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  93                 return 0;
  94
  95         if (hapd->iface->olbc)
  96                 erp |= ERP_INFO_USE_PROTECTION;
  97         if (hapd->iface->num_sta_non_erp > 0) {
  98                 erp |= ERP_INFO_NON_ERP_PRESENT |
  99                         ERP_INFO_USE_PROTECTION;
 100         }
 101         if (hapd->iface->num_sta_no_short_preamble > 0 ||
 102             hapd->iconf->preamble == LONG_PREAMBLE)
 103                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
 104
 105         return erp;
 106 }
 107
 108
 109 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 110 {
 111         *eid++ = WLAN_EID_DS_PARAMS;
 112         *eid++ = 1;
 113         *eid++ = hapd->iconf->channel;
 114         return eid;
 115 }
 116
 117
 118 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 119 {
 120         if (hapd->iface->current_mode == NULL ||
 121             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 122                 return eid;
 123
 124         /* Set NonERP_present and use_protection bits if there
 125          * are any associated NonERP stations. */
 126         /* TODO: use_protection bit can be set to zero even if
 127          * there are NonERP stations present. This optimization
 128          * might be useful if NonERP stations are "quiet".
 129          * See 802.11g/D6 E-1 for recommended practice.
 130          * In addition, Non ERP present might be set, if AP detects Non ERP
 131          * operation on other APs. */
 132
 133         /* Add ERP Information element */
 134         *eid++ = WLAN_EID_ERP_INFO;
 135         *eid++ = 1;
 136         *eid++ = ieee802_11_erp_info(hapd);
 137
 138         return eid;
 139 }
 140
 141
 142 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 143 {
 144         u8 *pos = eid;
 145         u8 local_pwr_constraint = 0;
 146         int dfs;
 147
 148         if (hapd->iface->current_mode == NULL ||
 149             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 150                 return eid;
 151
 152         /* Let host drivers add this IE if DFS support is offloaded */
 153         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 154                 return eid;
 155
 156         /*
 157          * There is no DFS support and power constraint was not directly
 158          * requested by config option.
 159          */
 160         if (!hapd->iconf->ieee80211h &&
 161             hapd->iconf->local_pwr_constraint == -1)
 162                 return eid;
 163
 164         /* Check if DFS is required by regulatory. */
 165         dfs = hostapd_is_dfs_required(hapd->iface);
 166         if (dfs < 0) {
 167                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 168                            dfs);
 169                 dfs = 0;
 170         }
 171
 172         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 173                 return eid;
 174
 175         /*
 176          * ieee80211h (DFS) is enabled so Power Constraint element shall
 177          * be added when running on DFS channel whenever local_pwr_constraint
 178          * is configured or not. In order to meet regulations when TPC is not
 179          * implemented using a transmit power that is below the legal maximum
 180          * (including any mitigation factor) should help. In this case,
 181          * indicate 3 dB below maximum allowed transmit power.
 182          */
 183         if (hapd->iconf->local_pwr_constraint == -1)
 184                 local_pwr_constraint = 3;
 185
 186         /*
 187          * A STA that is not an AP shall use a transmit power less than or
 188          * equal to the local maximum transmit power level for the channel.
 189          * The local maximum transmit power can be calculated from the formula:
 190          * local max TX pwr = max TX pwr - local pwr constraint
 191          * Where max TX pwr is maximum transmit power level specified for
 192          * channel in Country element and local pwr constraint is specified
 193          * for channel in this Power Constraint element.
 194          */
 195
 196         /* Element ID */
 197         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 198         /* Length */
 199         *pos++ = 1;
 200         /* Local Power Constraint */
 201         if (local_pwr_constraint)
 202                 *pos++ = local_pwr_constraint;
 203         else
 204                 *pos++ = hapd->iconf->local_pwr_constraint;
 205
 206         return pos;
 207 }
 208
 209
 210 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 211                                     struct hostapd_channel_data *start,
 212                                     struct hostapd_channel_data *prev)
 213 {
 214         if (end - pos < 3)
 215                 return pos;
 216
 217         /* first channel number */
 218         *pos++ = start->chan;
 219         /* number of channels */
 220         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 221         /* maximum transmit power level */
 222         *pos++ = start->max_tx_power;
 223
 224         return pos;
 225 }
 226
 227
 228 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 229                                 int max_len)
 230 {
 231         u8 *pos = eid;
 232         u8 *end = eid + max_len;
 233         int i;
 234         struct hostapd_hw_modes *mode;
 235         struct hostapd_channel_data *start, *prev;
 236         int chan_spacing = 1;
 237
 238         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 239             hapd->iface->current_mode == NULL)
 240                 return eid;
 241
 242         *pos++ = WLAN_EID_COUNTRY;
 243         pos++; /* length will be set later */
 244         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 245         pos += 3;
 246
 247         mode = hapd->iface->current_mode;
 248         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 249                 chan_spacing = 4;
 250
 251         start = prev = NULL;
 252         for (i = 0; i < mode->num_channels; i++) {
 253                 struct hostapd_channel_data *chan = &mode->channels[i];
 254                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 255                         continue;
 256                 if (start && prev &&
 257                     prev->chan + chan_spacing == chan->chan &&
 258                     start->max_tx_power == chan->max_tx_power) {
 259                         prev = chan;
 260                         continue; /* can use same entry */
 261                 }
 262
 263                 if (start && prev) {
 264                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 265                                                       start, prev);
 266                         start = NULL;
 267                 }
 268
 269                 /* Start new group */
 270                 start = prev = chan;
 271         }
 272
 273         if (start) {
 274                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 275                                               start, prev);
 276         }
 277
 278         if ((pos - eid) & 1) {
 279                 if (end - pos < 1)
 280                         return eid;
 281                 *pos++ = 0; /* pad for 16-bit alignment */
 282         }
 283
 284         eid[1] = (pos - eid) - 2;
 285
 286         return pos;
 287 }
 288
 289
 290 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 291 {
 292         const u8 *ie;
 293         size_t ielen;
 294
 295         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 296         if (ie == NULL || ielen > len)
 297                 return eid;
 298
 299         os_memcpy(eid, ie, ielen);
 300         return eid + ielen;
 301 }
 302
 303
 304 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 305 {
 306 #ifdef CONFIG_TESTING_OPTIONS
 307         if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
 308                 return eid;
 309 #endif /* CONFIG_TESTING_OPTIONS */
 310
 311         if (!hapd->cs_freq_params.channel)
 312                 return eid;
 313
 314         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 315         *eid++ = 3;
 316         *eid++ = hapd->cs_block_tx;
 317         *eid++ = hapd->cs_freq_params.channel;
 318         *eid++ = hapd->cs_count;
 319
 320         return eid;
 321 }
 322
 323
 324 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 325 {
 326         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 327                 return eid;
 328
 329         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 330         *eid++ = 4;
 331         *eid++ = hapd->cs_block_tx;
 332         *eid++ = hapd->iface->cs_oper_class;
 333         *eid++ = hapd->cs_freq_params.channel;
 334         *eid++ = hapd->cs_count;
 335
 336         return eid;
 337 }
 338
 339
 340 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
 341 {
 342         u8 op_class, channel;
 343
 344         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
 345             !hapd->iface->freq)
 346                 return eid;
 347
 348         if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
 349                                           hapd->iconf->secondary_channel,
 350                                           hostapd_get_oper_chwidth(hapd->iconf),
 351                                           &op_class, &channel) ==
 352             NUM_HOSTAPD_MODES)
 353                 return eid;
 354
 355         *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
 356         *eid++ = 2;
 357
 358         /* Current Operating Class */
 359         *eid++ = op_class;
 360
 361         /* TODO: Advertise all the supported operating classes */
 362         *eid++ = 0;
 363
 364         return eid;
 365 }
 366
 367
 368 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 369                                    const struct ieee80211_mgmt *req,
 370                                    int is_p2p, size_t *resp_len)
 371 {
 372         struct ieee80211_mgmt *resp;
 373         u8 *pos, *epos, *csa_pos;
 374         size_t buflen;
 375
 376 #define MAX_PROBERESP_LEN 768
 377         buflen = MAX_PROBERESP_LEN;
 378 #ifdef CONFIG_WPS
 379         if (hapd->wps_probe_resp_ie)
 380                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 381 #endif /* CONFIG_WPS */
 382 #ifdef CONFIG_P2P
 383         if (hapd->p2p_probe_resp_ie)
 384                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 385 #endif /* CONFIG_P2P */
 386 #ifdef CONFIG_FST
 387         if (hapd->iface->fst_ies)
 388                 buflen += wpabuf_len(hapd->iface->fst_ies);
 389 #endif /* CONFIG_FST */
 390         if (hapd->conf->vendor_elements)
 391                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 392         if (hapd->conf->vendor_vht) {
 393                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 394                         2 + sizeof(struct ieee80211_vht_operation);
 395         }
 396
 397 #ifdef CONFIG_IEEE80211AX
 398         if (hapd->iconf->ieee80211ax) {
 399                 buflen += 3 + sizeof(struct ieee80211_he_capabilities) +
 400                         3 + sizeof(struct ieee80211_he_operation) +
 401                         3 + sizeof(struct ieee80211_he_mu_edca_parameter_set) +
 402                         3 + sizeof(struct ieee80211_spatial_reuse);
 403         }
 404 #endif /* CONFIG_IEEE80211AX */
 405
 406         buflen += hostapd_mbo_ie_len(hapd);
 407         buflen += hostapd_eid_owe_trans_len(hapd);
 408
 409         resp = os_zalloc(buflen);
 410         if (resp == NULL)
 411                 return NULL;
 412
 413         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 414
 415         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 416                                            WLAN_FC_STYPE_PROBE_RESP);
 417         if (req)
 418                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 419         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 420
 421         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 422         resp->u.probe_resp.beacon_int =
 423                 host_to_le16(hapd->iconf->beacon_int);
 424
 425         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 426         resp->u.probe_resp.capab_info =
 427                 host_to_le16(hostapd_own_capab_info(hapd));
 428
 429         pos = resp->u.probe_resp.variable;
 430         *pos++ = WLAN_EID_SSID;
 431         *pos++ = hapd->conf->ssid.ssid_len;
 432         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 433         pos += hapd->conf->ssid.ssid_len;
 434
 435         /* Supported rates */
 436         pos = hostapd_eid_supp_rates(hapd, pos);
 437
 438         /* DS Params */
 439         pos = hostapd_eid_ds_params(hapd, pos);
 440
 441         pos = hostapd_eid_country(hapd, pos, epos - pos);
 442
 443         /* Power Constraint element */
 444         pos = hostapd_eid_pwr_constraint(hapd, pos);
 445
 446         /* CSA IE */
 447         csa_pos = hostapd_eid_csa(hapd, pos);
 448         if (csa_pos != pos)
 449                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 450         pos = csa_pos;
 451
 452         /* ERP Information element */
 453         pos = hostapd_eid_erp_info(hapd, pos);
 454
 455         /* Extended supported rates */
 456         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 457
 458         /* RSN, MDIE */
 459         if (hapd->conf->wpa != WPA_PROTO_WPA)
 460                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 461
 462         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 463
 464         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 465
 466         /* eCSA IE */
 467         csa_pos = hostapd_eid_ecsa(hapd, pos);
 468         if (csa_pos != pos)
 469                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 470         pos = csa_pos;
 471
 472         pos = hostapd_eid_supported_op_classes(hapd, pos);
 473
 474 #ifdef CONFIG_IEEE80211N
 475         /* Secondary Channel Offset element */
 476         /* TODO: The standard doesn't specify a position for this element. */
 477         pos = hostapd_eid_secondary_channel(hapd, pos);
 478
 479         pos = hostapd_eid_ht_capabilities(hapd, pos);
 480         pos = hostapd_eid_ht_operation(hapd, pos);
 481 #endif /* CONFIG_IEEE80211N */
 482
 483         pos = hostapd_eid_ext_capab(hapd, pos);
 484
 485         pos = hostapd_eid_time_adv(hapd, pos);
 486         pos = hostapd_eid_time_zone(hapd, pos);
 487
 488         pos = hostapd_eid_interworking(hapd, pos);
 489         pos = hostapd_eid_adv_proto(hapd, pos);
 490         pos = hostapd_eid_roaming_consortium(hapd, pos);
 491
 492 #ifdef CONFIG_FST
 493         if (hapd->iface->fst_ies) {
 494                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 495                           wpabuf_len(hapd->iface->fst_ies));
 496                 pos += wpabuf_len(hapd->iface->fst_ies);
 497         }
 498 #endif /* CONFIG_FST */
 499
 500 #ifdef CONFIG_IEEE80211AC
 501         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 502                 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
 503                 pos = hostapd_eid_vht_operation(hapd, pos);
 504                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 505                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 506         }
 507 #endif /* CONFIG_IEEE80211AC */
 508
 509         pos = hostapd_eid_fils_indic(hapd, pos, 0);
 510
 511 #ifdef CONFIG_IEEE80211AX
 512         if (hapd->iconf->ieee80211ax) {
 513                 pos = hostapd_eid_he_capab(hapd, pos, IEEE80211_MODE_AP);
 514                 pos = hostapd_eid_he_operation(hapd, pos);
 515                 pos = hostapd_eid_he_mu_edca_parameter_set(hapd, pos);
 516                 pos = hostapd_eid_spatial_reuse(hapd, pos);
 517         }
 518 #endif /* CONFIG_IEEE80211AX */
 519
 520 #ifdef CONFIG_IEEE80211AC
 521         if (hapd->conf->vendor_vht)
 522                 pos = hostapd_eid_vendor_vht(hapd, pos);
 523 #endif /* CONFIG_IEEE80211AC */
 524
 525         /* WPA */
 526         if (hapd->conf->wpa == WPA_PROTO_WPA)
 527                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 528
 529         /* Wi-Fi Alliance WMM */
 530         pos = hostapd_eid_wmm(hapd, pos);
 531
 532 #ifdef CONFIG_WPS
 533         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 534                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 535                           wpabuf_len(hapd->wps_probe_resp_ie));
 536                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 537         }
 538 #endif /* CONFIG_WPS */
 539
 540 #ifdef CONFIG_P2P
 541         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 542             hapd->p2p_probe_resp_ie) {
 543                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 544                           wpabuf_len(hapd->p2p_probe_resp_ie));
 545                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 546         }
 547 #endif /* CONFIG_P2P */
 548 #ifdef CONFIG_P2P_MANAGER
 549         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 550             P2P_MANAGE)
 551                 pos = hostapd_eid_p2p_manage(hapd, pos);
 552 #endif /* CONFIG_P2P_MANAGER */
 553
 554 #ifdef CONFIG_HS20
 555         pos = hostapd_eid_hs20_indication(hapd, pos);
 556         pos = hostapd_eid_osen(hapd, pos);
 557 #endif /* CONFIG_HS20 */
 558
 559         pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 560         pos = hostapd_eid_owe_trans(hapd, pos, (u8 *) resp + buflen - pos);
 561
 562         if (hapd->conf->vendor_elements) {
 563                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 564                           wpabuf_len(hapd->conf->vendor_elements));
 565                 pos += wpabuf_len(hapd->conf->vendor_elements);
 566         }
 567
 568         *resp_len = pos - (u8 *) resp;
 569         return (u8 *) resp;
 570 }
 571
 572
 573 enum ssid_match_result {
 574         NO_SSID_MATCH,
 575         EXACT_SSID_MATCH,
 576         WILDCARD_SSID_MATCH
 577 };
 578
 579 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 580                                          const u8 *ssid, size_t ssid_len,
 581                                          const u8 *ssid_list,
 582                                          size_t ssid_list_len)
 583 {
 584         const u8 *pos, *end;
 585         int wildcard = 0;
 586
 587         if (ssid_len == 0)
 588                 wildcard = 1;
 589         if (ssid_len == hapd->conf->ssid.ssid_len &&
 590             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 591                 return EXACT_SSID_MATCH;
 592
 593         if (ssid_list == NULL)
 594                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 595
 596         pos = ssid_list;
 597         end = ssid_list + ssid_list_len;
 598         while (end - pos >= 2) {
 599                 if (2 + pos[1] > end - pos)
 600                         break;
 601                 if (pos[1] == 0)
 602                         wildcard = 1;
 603                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 604                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 605                         return EXACT_SSID_MATCH;
 606                 pos += 2 + pos[1];
 607         }
 608
 609         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 610 }
 611
 612
 613 void sta_track_expire(struct hostapd_iface *iface, int force)
 614 {
 615         struct os_reltime now;
 616         struct hostapd_sta_info *info;
 617
 618         if (!iface->num_sta_seen)
 619                 return;
 620
 621         os_get_reltime(&now);
 622         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 623                                      list))) {
 624                 if (!force &&
 625                     !os_reltime_expired(&now, &info->last_seen,
 626                                         iface->conf->track_sta_max_age))
 627                         break;
 628                 force = 0;
 629
 630                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 631                            MACSTR, iface->bss[0]->conf->iface,
 632                            MAC2STR(info->addr));
 633                 dl_list_del(&info->list);
 634                 iface->num_sta_seen--;
 635                 sta_track_del(info);
 636         }
 637 }
 638
 639
 640 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 641                                                const u8 *addr)
 642 {
 643         struct hostapd_sta_info *info;
 644
 645         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 646                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 647                         return info;
 648
 649         return NULL;
 650 }
 651
 652
 653 void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal)
 654 {
 655         struct hostapd_sta_info *info;
 656
 657         info = sta_track_get(iface, addr);
 658         if (info) {
 659                 /* Move the most recent entry to the end of the list */
 660                 dl_list_del(&info->list);
 661                 dl_list_add_tail(&iface->sta_seen, &info->list);
 662                 os_get_reltime(&info->last_seen);
 663                 info->ssi_signal = ssi_signal;
 664                 return;
 665         }
 666
 667         /* Add a new entry */
 668         info = os_zalloc(sizeof(*info));
 669         if (info == NULL)
 670                 return;
 671         os_memcpy(info->addr, addr, ETH_ALEN);
 672         os_get_reltime(&info->last_seen);
 673         info->ssi_signal = ssi_signal;
 674
 675         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 676                 /* Expire oldest entry to make room for a new one */
 677                 sta_track_expire(iface, 1);
 678         }
 679
 680         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 681                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 682         dl_list_add_tail(&iface->sta_seen, &info->list);
 683         iface->num_sta_seen++;
 684 }
 685
 686
 687 struct hostapd_data *
 688 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 689                   const char *ifname)
 690 {
 691         struct hapd_interfaces *interfaces = iface->interfaces;
 692         size_t i, j;
 693
 694         for (i = 0; i < interfaces->count; i++) {
 695                 struct hostapd_data *hapd = NULL;
 696
 697                 iface = interfaces->iface[i];
 698                 for (j = 0; j < iface->num_bss; j++) {
 699                         hapd = iface->bss[j];
 700                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 701                                 break;
 702                         hapd = NULL;
 703                 }
 704
 705                 if (hapd && sta_track_get(iface, addr))
 706                         return hapd;
 707         }
 708
 709         return NULL;
 710 }
 711
 712
 713 #ifdef CONFIG_TAXONOMY
 714 void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr,
 715                                    struct wpabuf **probe_ie_taxonomy)
 716 {
 717         struct hostapd_sta_info *info;
 718
 719         info = sta_track_get(iface, addr);
 720         if (!info)
 721                 return;
 722
 723         wpabuf_free(*probe_ie_taxonomy);
 724         *probe_ie_taxonomy = info->probe_ie_taxonomy;
 725         info->probe_ie_taxonomy = NULL;
 726 }
 727 #endif /* CONFIG_TAXONOMY */
 728
 729
 730 void handle_probe_req(struct hostapd_data *hapd,
 731                       const struct ieee80211_mgmt *mgmt, size_t len,
 732                       int ssi_signal)
 733 {
 734         u8 *resp;
 735         struct ieee802_11_elems elems;
 736         const u8 *ie;
 737         size_t ie_len;
 738         size_t i, resp_len;
 739         int noack;
 740         enum ssid_match_result res;
 741         int ret;
 742         u16 csa_offs[2];
 743         size_t csa_offs_len;
 744         u32 session_timeout, acct_interim_interval;
 745         struct vlan_description vlan_id;
 746         struct hostapd_sta_wpa_psk_short *psk = NULL;
 747         char *identity = NULL;
 748         char *radius_cui = NULL;
 749
 750         if (len < IEEE80211_HDRLEN)
 751                 return;
 752         ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
 753         if (hapd->iconf->track_sta_max_num)
 754                 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
 755         ie_len = len - IEEE80211_HDRLEN;
 756
 757         ret = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len,
 758                                          &session_timeout,
 759                                          &acct_interim_interval, &vlan_id,
 760                                          &psk, &identity, &radius_cui, 1);
 761         if (ret == HOSTAPD_ACL_REJECT) {
 762                 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 763                         "Ignore Probe Request frame from " MACSTR
 764                         " due to ACL reject ", MAC2STR(mgmt->sa));
 765                 return;
 766         }
 767
 768         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 769                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 770                                             mgmt->sa, mgmt->da, mgmt->bssid,
 771                                             ie, ie_len, ssi_signal) > 0)
 772                         return;
 773
 774         if (!hapd->conf->send_probe_response)
 775                 return;
 776
 777         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 778                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 779                            MAC2STR(mgmt->sa));
 780                 return;
 781         }
 782
 783         if ((!elems.ssid || !elems.supp_rates)) {
 784                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 785                            "without SSID or supported rates element",
 786                            MAC2STR(mgmt->sa));
 787                 return;
 788         }
 789
 790         /*
 791          * No need to reply if the Probe Request frame was sent on an adjacent
 792          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 793          * AP with dot11RadioMeasurementActivated set to true, but strictly
 794          * speaking does not allow such ignoring of Probe Request frames if
 795          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 796          * number of unnecessary Probe Response frames for cases where the STA
 797          * is less likely to see them (Probe Request frame sent on a
 798          * neighboring, but partially overlapping, channel).
 799          */
 800         if (elems.ds_params &&
 801             hapd->iface->current_mode &&
 802             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 803              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 804             hapd->iconf->channel != elems.ds_params[0]) {
 805                 wpa_printf(MSG_DEBUG,
 806                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 807                            hapd->iconf->channel, elems.ds_params[0]);
 808                 return;
 809         }
 810
 811 #ifdef CONFIG_P2P
 812         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 813                 struct wpabuf *wps;
 814                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 815                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 816                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 817                                    "due to mismatch with Requested Device "
 818                                    "Type");
 819                         wpabuf_free(wps);
 820                         return;
 821                 }
 822                 wpabuf_free(wps);
 823         }
 824
 825         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 826                 struct wpabuf *p2p;
 827                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 828                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 829                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 830                                    "due to mismatch with Device ID");
 831                         wpabuf_free(p2p);
 832                         return;
 833                 }
 834                 wpabuf_free(p2p);
 835         }
 836 #endif /* CONFIG_P2P */
 837
 838         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 839             elems.ssid_list_len == 0) {
 840                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 841                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 842                 return;
 843         }
 844
 845 #ifdef CONFIG_P2P
 846         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 847             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 848             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 849                       P2P_WILDCARD_SSID_LEN) == 0) {
 850                 /* Process P2P Wildcard SSID like Wildcard SSID */
 851                 elems.ssid_len = 0;
 852         }
 853 #endif /* CONFIG_P2P */
 854
 855 #ifdef CONFIG_TAXONOMY
 856         {
 857                 struct sta_info *sta;
 858                 struct hostapd_sta_info *info;
 859
 860                 if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) {
 861                         taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len);
 862                 } else if ((info = sta_track_get(hapd->iface,
 863                                                  mgmt->sa)) != NULL) {
 864                         taxonomy_hostapd_sta_info_probe_req(hapd, info,
 865                                                             ie, ie_len);
 866                 }
 867         }
 868 #endif /* CONFIG_TAXONOMY */
 869
 870         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 871                          elems.ssid_list, elems.ssid_list_len);
 872         if (res == NO_SSID_MATCH) {
 873                 if (!(mgmt->da[0] & 0x01)) {
 874                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 875                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 876                                    MAC2STR(mgmt->sa),
 877                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 878                                    MAC2STR(mgmt->da),
 879                                    elems.ssid_list ? " (SSID list)" : "");
 880                 }
 881                 return;
 882         }
 883
 884 #ifdef CONFIG_INTERWORKING
 885         if (hapd->conf->interworking &&
 886             elems.interworking && elems.interworking_len >= 1) {
 887                 u8 ant = elems.interworking[0] & 0x0f;
 888                 if (ant != INTERWORKING_ANT_WILDCARD &&
 889                     ant != hapd->conf->access_network_type) {
 890                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 891                                    " for mismatching ANT %u ignored",
 892                                    MAC2STR(mgmt->sa), ant);
 893                         return;
 894                 }
 895         }
 896
 897         if (hapd->conf->interworking && elems.interworking &&
 898             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 899                 const u8 *hessid;
 900                 if (elems.interworking_len == 7)
 901                         hessid = elems.interworking + 1;
 902                 else
 903                         hessid = elems.interworking + 1 + 2;
 904                 if (!is_broadcast_ether_addr(hessid) &&
 905                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 906                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 907                                    " for mismatching HESSID " MACSTR
 908                                    " ignored",
 909                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 910                         return;
 911                 }
 912         }
 913 #endif /* CONFIG_INTERWORKING */
 914
 915 #ifdef CONFIG_P2P
 916         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 917             supp_rates_11b_only(&elems)) {
 918                 /* Indicates support for 11b rates only */
 919                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 920                            MACSTR " with only 802.11b rates",
 921                            MAC2STR(mgmt->sa));
 922                 return;
 923         }
 924 #endif /* CONFIG_P2P */
 925
 926         /* TODO: verify that supp_rates contains at least one matching rate
 927          * with AP configuration */
 928
 929         if (hapd->conf->no_probe_resp_if_seen_on &&
 930             is_multicast_ether_addr(mgmt->da) &&
 931             is_multicast_ether_addr(mgmt->bssid) &&
 932             sta_track_seen_on(hapd->iface, mgmt->sa,
 933                               hapd->conf->no_probe_resp_if_seen_on)) {
 934                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 935                            " since STA has been seen on %s",
 936                            hapd->conf->iface, MAC2STR(mgmt->sa),
 937                            hapd->conf->no_probe_resp_if_seen_on);
 938                 return;
 939         }
 940
 941         if (hapd->conf->no_probe_resp_if_max_sta &&
 942             is_multicast_ether_addr(mgmt->da) &&
 943             is_multicast_ether_addr(mgmt->bssid) &&
 944             hapd->num_sta >= hapd->conf->max_num_sta &&
 945             !ap_get_sta(hapd, mgmt->sa)) {
 946                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 947                            " since no room for additional STA",
 948                            hapd->conf->iface, MAC2STR(mgmt->sa));
 949                 return;
 950         }
 951
 952 #ifdef CONFIG_TESTING_OPTIONS
 953         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 954             drand48() < hapd->iconf->ignore_probe_probability) {
 955                 wpa_printf(MSG_INFO,
 956                            "TESTING: ignoring probe request from " MACSTR,
 957                            MAC2STR(mgmt->sa));
 958                 return;
 959         }
 960 #endif /* CONFIG_TESTING_OPTIONS */
 961
 962         wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, RX_PROBE_REQUEST "sa=" MACSTR
 963                      " signal=%d", MAC2STR(mgmt->sa), ssi_signal);
 964
 965         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 966                                       &resp_len);
 967         if (resp == NULL)
 968                 return;
 969
 970         /*
 971          * If this is a broadcast probe request, apply no ack policy to avoid
 972          * excessive retries.
 973          */
 974         noack = !!(res == WILDCARD_SSID_MATCH &&
 975                    is_broadcast_ether_addr(mgmt->da));
 976
 977         csa_offs_len = 0;
 978         if (hapd->csa_in_progress) {
 979                 if (hapd->cs_c_off_proberesp)
 980                         csa_offs[csa_offs_len++] =
 981                                 hapd->cs_c_off_proberesp;
 982
 983                 if (hapd->cs_c_off_ecsa_proberesp)
 984                         csa_offs[csa_offs_len++] =
 985                                 hapd->cs_c_off_ecsa_proberesp;
 986         }
 987
 988         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 989                                         csa_offs_len ? csa_offs : NULL,
 990                                         csa_offs_len);
 991
 992         if (ret < 0)
 993                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 994
 995         os_free(resp);
 996
 997         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 998                    "SSID", MAC2STR(mgmt->sa),
 999                    elems.ssid_len == 0 ? "broadcast" : "our");
1000 }
1001
1002
1003 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
1004                                         size_t *resp_len)
1005 {
1006         /* check probe response offloading caps and print warnings */
1007         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
1008                 return NULL;
1009
1010 #ifdef CONFIG_WPS
1011         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
1012             (!(hapd->iface->probe_resp_offloads &
1013                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
1014                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
1015                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
1016                            "Probe Response while not supporting this");
1017 #endif /* CONFIG_WPS */
1018
1019 #ifdef CONFIG_P2P
1020         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
1021             !(hapd->iface->probe_resp_offloads &
1022               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
1023                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
1024                            "Probe Response while not supporting this");
1025 #endif  /* CONFIG_P2P */
1026
1027         if (hapd->conf->interworking &&
1028             !(hapd->iface->probe_resp_offloads &
1029               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
1030                 wpa_printf(MSG_WARNING, "Device is trying to offload "
1031                            "Interworking Probe Response while not supporting "
1032                            "this");
1033
1034         /* Generate a Probe Response template for the non-P2P case */
1035         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
1036 }
1037
1038 #endif /* NEED_AP_MLME */
1039
1040
1041 void sta_track_del(struct hostapd_sta_info *info)
1042 {
1043 #ifdef CONFIG_TAXONOMY
1044         wpabuf_free(info->probe_ie_taxonomy);
1045         info->probe_ie_taxonomy = NULL;
1046 #endif /* CONFIG_TAXONOMY */
1047         os_free(info);
1048 }
1049
1050
1051 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
1052                                struct wpa_driver_ap_params *params)
1053 {
1054         struct ieee80211_mgmt *head = NULL;
1055         u8 *tail = NULL;
1056         size_t head_len = 0, tail_len = 0;
1057         u8 *resp = NULL;
1058         size_t resp_len = 0;
1059 #ifdef NEED_AP_MLME
1060         u16 capab_info;
1061         u8 *pos, *tailpos, *csa_pos;
1062
1063 #define BEACON_HEAD_BUF_SIZE 256
1064 #define BEACON_TAIL_BUF_SIZE 512
1065         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
1066         tail_len = BEACON_TAIL_BUF_SIZE;
1067 #ifdef CONFIG_WPS
1068         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
1069                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
1070 #endif /* CONFIG_WPS */
1071 #ifdef CONFIG_P2P
1072         if (hapd->p2p_beacon_ie)
1073                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
1074 #endif /* CONFIG_P2P */
1075 #ifdef CONFIG_FST
1076         if (hapd->iface->fst_ies)
1077                 tail_len += wpabuf_len(hapd->iface->fst_ies);
1078 #endif /* CONFIG_FST */
1079         if (hapd->conf->vendor_elements)
1080                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
1081
1082 #ifdef CONFIG_IEEE80211AC
1083         if (hapd->conf->vendor_vht) {
1084                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
1085                         2 + sizeof(struct ieee80211_vht_operation);
1086         }
1087 #endif /* CONFIG_IEEE80211AC */
1088
1089 #ifdef CONFIG_IEEE80211AX
1090         if (hapd->iconf->ieee80211ax) {
1091                 tail_len += 3 + sizeof(struct ieee80211_he_capabilities) +
1092                         3 + sizeof(struct ieee80211_he_operation) +
1093                         3 + sizeof(struct ieee80211_he_mu_edca_parameter_set) +
1094                         3 + sizeof(struct ieee80211_spatial_reuse);
1095         }
1096 #endif /* CONFIG_IEEE80211AX */
1097
1098         tail_len += hostapd_mbo_ie_len(hapd);
1099         tail_len += hostapd_eid_owe_trans_len(hapd);
1100
1101         tailpos = tail = os_malloc(tail_len);
1102         if (head == NULL || tail == NULL) {
1103                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
1104                 os_free(head);
1105                 os_free(tail);
1106                 return -1;
1107         }
1108
1109         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1110                                            WLAN_FC_STYPE_BEACON);
1111         head->duration = host_to_le16(0);
1112         os_memset(head->da, 0xff, ETH_ALEN);
1113
1114         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1115         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1116         head->u.beacon.beacon_int =
1117                 host_to_le16(hapd->iconf->beacon_int);
1118
1119         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1120         capab_info = hostapd_own_capab_info(hapd);
1121         head->u.beacon.capab_info = host_to_le16(capab_info);
1122         pos = &head->u.beacon.variable[0];
1123
1124         /* SSID */
1125         *pos++ = WLAN_EID_SSID;
1126         if (hapd->conf->ignore_broadcast_ssid == 2) {
1127                 /* clear the data, but keep the correct length of the SSID */
1128                 *pos++ = hapd->conf->ssid.ssid_len;
1129                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1130                 pos += hapd->conf->ssid.ssid_len;
1131         } else if (hapd->conf->ignore_broadcast_ssid) {
1132                 *pos++ = 0; /* empty SSID */
1133         } else {
1134                 *pos++ = hapd->conf->ssid.ssid_len;
1135                 os_memcpy(pos, hapd->conf->ssid.ssid,
1136                           hapd->conf->ssid.ssid_len);
1137                 pos += hapd->conf->ssid.ssid_len;
1138         }
1139
1140         /* Supported rates */
1141         pos = hostapd_eid_supp_rates(hapd, pos);
1142
1143         /* DS Params */
1144         pos = hostapd_eid_ds_params(hapd, pos);
1145
1146         head_len = pos - (u8 *) head;
1147
1148         tailpos = hostapd_eid_country(hapd, tailpos,
1149                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1150
1151         /* Power Constraint element */
1152         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1153
1154         /* CSA IE */
1155         csa_pos = hostapd_eid_csa(hapd, tailpos);
1156         if (csa_pos != tailpos)
1157                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1158         tailpos = csa_pos;
1159
1160         /* ERP Information element */
1161         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1162
1163         /* Extended supported rates */
1164         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1165
1166         /* RSN, MDIE */
1167         if (hapd->conf->wpa != WPA_PROTO_WPA)
1168                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1169                                           tail + BEACON_TAIL_BUF_SIZE -
1170                                           tailpos);
1171
1172         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1173                                                tail + BEACON_TAIL_BUF_SIZE -
1174                                                tailpos);
1175
1176         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1177                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1178
1179         /* eCSA IE */
1180         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1181         if (csa_pos != tailpos)
1182                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1183         tailpos = csa_pos;
1184
1185         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1186
1187 #ifdef CONFIG_IEEE80211N
1188         /* Secondary Channel Offset element */
1189         /* TODO: The standard doesn't specify a position for this element. */
1190         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1191
1192         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1193         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1194 #endif /* CONFIG_IEEE80211N */
1195
1196         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1197
1198         /*
1199          * TODO: Time Advertisement element should only be included in some
1200          * DTIM Beacon frames.
1201          */
1202         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1203
1204         tailpos = hostapd_eid_interworking(hapd, tailpos);
1205         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1206         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1207
1208 #ifdef CONFIG_FST
1209         if (hapd->iface->fst_ies) {
1210                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1211                           wpabuf_len(hapd->iface->fst_ies));
1212                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1213         }
1214 #endif /* CONFIG_FST */
1215
1216 #ifdef CONFIG_IEEE80211AC
1217         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1218                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1219                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1220                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1221                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1222         }
1223 #endif /* CONFIG_IEEE80211AC */
1224
1225         tailpos = hostapd_eid_fils_indic(hapd, tailpos, 0);
1226
1227 #ifdef CONFIG_IEEE80211AX
1228         if (hapd->iconf->ieee80211ax) {
1229                 tailpos = hostapd_eid_he_capab(hapd, tailpos,
1230                                                IEEE80211_MODE_AP);
1231                 tailpos = hostapd_eid_he_operation(hapd, tailpos);
1232                 tailpos = hostapd_eid_he_mu_edca_parameter_set(hapd, tailpos);
1233                 tailpos = hostapd_eid_spatial_reuse(hapd, tailpos);
1234         }
1235 #endif /* CONFIG_IEEE80211AX */
1236
1237 #ifdef CONFIG_IEEE80211AC
1238         if (hapd->conf->vendor_vht)
1239                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1240 #endif /* CONFIG_IEEE80211AC */
1241
1242         /* WPA */
1243         if (hapd->conf->wpa == WPA_PROTO_WPA)
1244                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1245                                           tail + BEACON_TAIL_BUF_SIZE -
1246                                           tailpos);
1247
1248         /* Wi-Fi Alliance WMM */
1249         tailpos = hostapd_eid_wmm(hapd, tailpos);
1250
1251 #ifdef CONFIG_WPS
1252         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1253                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1254                           wpabuf_len(hapd->wps_beacon_ie));
1255                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1256         }
1257 #endif /* CONFIG_WPS */
1258
1259 #ifdef CONFIG_P2P
1260         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1261                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1262                           wpabuf_len(hapd->p2p_beacon_ie));
1263                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1264         }
1265 #endif /* CONFIG_P2P */
1266 #ifdef CONFIG_P2P_MANAGER
1267         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1268             P2P_MANAGE)
1269                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1270 #endif /* CONFIG_P2P_MANAGER */
1271
1272 #ifdef CONFIG_HS20
1273         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1274         tailpos = hostapd_eid_osen(hapd, tailpos);
1275 #endif /* CONFIG_HS20 */
1276
1277         tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1278         tailpos = hostapd_eid_owe_trans(hapd, tailpos,
1279                                         tail + tail_len - tailpos);
1280
1281         if (hapd->conf->vendor_elements) {
1282                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1283                           wpabuf_len(hapd->conf->vendor_elements));
1284                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1285         }
1286
1287         tail_len = tailpos > tail ? tailpos - tail : 0;
1288
1289         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1290 #endif /* NEED_AP_MLME */
1291
1292         os_memset(params, 0, sizeof(*params));
1293         params->head = (u8 *) head;
1294         params->head_len = head_len;
1295         params->tail = tail;
1296         params->tail_len = tail_len;
1297         params->proberesp = resp;
1298         params->proberesp_len = resp_len;
1299         params->dtim_period = hapd->conf->dtim_period;
1300         params->beacon_int = hapd->iconf->beacon_int;
1301         params->basic_rates = hapd->iface->basic_rates;
1302         params->beacon_rate = hapd->iconf->beacon_rate;
1303         params->rate_type = hapd->iconf->rate_type;
1304         params->ssid = hapd->conf->ssid.ssid;
1305         params->ssid_len = hapd->conf->ssid.ssid_len;
1306         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1307             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1308                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1309                         hapd->conf->rsn_pairwise;
1310         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1311                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1312         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1313                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1314         params->group_cipher = hapd->conf->wpa_group;
1315         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1316         params->auth_algs = hapd->conf->auth_algs;
1317         params->wpa_version = hapd->conf->wpa;
1318         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1319                 (hapd->conf->ieee802_1x &&
1320                  (hapd->conf->default_wep_key_len ||
1321                   hapd->conf->individual_wep_key_len));
1322         switch (hapd->conf->ignore_broadcast_ssid) {
1323         case 0:
1324                 params->hide_ssid = NO_SSID_HIDING;
1325                 break;
1326         case 1:
1327                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1328                 break;
1329         case 2:
1330                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1331                 break;
1332         }
1333         params->isolate = hapd->conf->isolate;
1334         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1335 #ifdef NEED_AP_MLME
1336         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1337                                 ERP_INFO_USE_PROTECTION);
1338         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1339                 hapd->iconf->preamble == SHORT_PREAMBLE;
1340         if (hapd->iface->current_mode &&
1341             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1342                 params->short_slot_time =
1343                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1344         else
1345                 params->short_slot_time = -1;
1346         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1347                 params->ht_opmode = -1;
1348         else
1349                 params->ht_opmode = hapd->iface->ht_op_mode;
1350 #endif /* NEED_AP_MLME */
1351         params->interworking = hapd->conf->interworking;
1352         if (hapd->conf->interworking &&
1353             !is_zero_ether_addr(hapd->conf->hessid))
1354                 params->hessid = hapd->conf->hessid;
1355         params->access_network_type = hapd->conf->access_network_type;
1356         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1357 #ifdef CONFIG_P2P
1358         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1359 #endif /* CONFIG_P2P */
1360 #ifdef CONFIG_HS20
1361         params->disable_dgaf = hapd->conf->disable_dgaf;
1362         if (hapd->conf->osen) {
1363                 params->privacy = 1;
1364                 params->osen = 1;
1365         }
1366 #endif /* CONFIG_HS20 */
1367         params->multicast_to_unicast = hapd->conf->multicast_to_unicast;
1368         params->pbss = hapd->conf->pbss;
1369
1370         if (hapd->conf->ftm_responder) {
1371                 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_FTM_RESPONDER) {
1372                         params->ftm_responder = 1;
1373                         params->lci = hapd->iface->conf->lci;
1374                         params->civic = hapd->iface->conf->civic;
1375                 } else {
1376                         wpa_printf(MSG_WARNING,
1377                                    "Not configuring FTM responder as the driver doesn't advertise support for it");
1378                 }
1379         }
1380
1381         return 0;
1382 }
1383
1384
1385 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1386 {
1387         os_free(params->tail);
1388         params->tail = NULL;
1389         os_free(params->head);
1390         params->head = NULL;
1391         os_free(params->proberesp);
1392         params->proberesp = NULL;
1393 }
1394
1395
1396 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1397 {
1398         struct wpa_driver_ap_params params;
1399         struct hostapd_freq_params freq;
1400         struct hostapd_iface *iface = hapd->iface;
1401         struct hostapd_config *iconf = iface->conf;
1402         struct hostapd_hw_modes *cmode = iface->current_mode;
1403         struct wpabuf *beacon, *proberesp, *assocresp;
1404         int res, ret = -1;
1405
1406         if (hapd->csa_in_progress) {
1407                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1408                 return -1;
1409         }
1410
1411         hapd->beacon_set_done = 1;
1412
1413         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1414                 return -1;
1415
1416         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1417             0)
1418                 goto fail;
1419
1420         params.beacon_ies = beacon;
1421         params.proberesp_ies = proberesp;
1422         params.assocresp_ies = assocresp;
1423         params.reenable = hapd->reenable_beacon;
1424         hapd->reenable_beacon = 0;
1425
1426         if (cmode &&
1427             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1428                                     iconf->channel, iconf->ieee80211n,
1429                                     iconf->ieee80211ac, iconf->ieee80211ax,
1430                                     iconf->secondary_channel,
1431                                     hostapd_get_oper_chwidth(iconf),
1432                                     hostapd_get_oper_centr_freq_seg0_idx(iconf),
1433                                     hostapd_get_oper_centr_freq_seg1_idx(iconf),
1434                                     cmode->vht_capab,
1435                                     &cmode->he_capab[IEEE80211_MODE_AP]) == 0)
1436                 params.freq = &freq;
1437
1438         res = hostapd_drv_set_ap(hapd, &params);
1439         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1440         if (res)
1441                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1442         else
1443                 ret = 0;
1444 fail:
1445         ieee802_11_free_ap_params(&params);
1446         return ret;
1447 }
1448
1449
1450 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1451 {
1452         size_t i;
1453         int ret = 0;
1454
1455         for (i = 0; i < iface->num_bss; i++) {
1456                 if (iface->bss[i]->started &&
1457                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1458                         ret = -1;
1459         }
1460
1461         return ret;
1462 }
1463
1464
1465 /* only update beacons if started */
1466 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1467 {
1468         size_t i;
1469         int ret = 0;
1470
1471         for (i = 0; i < iface->num_bss; i++) {
1472                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1473                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1474                         ret = -1;
1475         }
1476
1477         return ret;
1478 }
1479
1480 #endif /* CONFIG_NATIVE_WINDOWS */