contrib/wpa/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                                           hapd->iconf->vht_oper_chwidth,
 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         }
 403 #endif /* CONFIG_IEEE80211AX */
 404
 405         buflen += hostapd_mbo_ie_len(hapd);
 406         buflen += hostapd_eid_owe_trans_len(hapd);
 407
 408         resp = os_zalloc(buflen);
 409         if (resp == NULL)
 410                 return NULL;
 411
 412         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 413
 414         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 415                                            WLAN_FC_STYPE_PROBE_RESP);
 416         if (req)
 417                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 418         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 419
 420         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 421         resp->u.probe_resp.beacon_int =
 422                 host_to_le16(hapd->iconf->beacon_int);
 423
 424         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 425         resp->u.probe_resp.capab_info =
 426                 host_to_le16(hostapd_own_capab_info(hapd));
 427
 428         pos = resp->u.probe_resp.variable;
 429         *pos++ = WLAN_EID_SSID;
 430         *pos++ = hapd->conf->ssid.ssid_len;
 431         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 432         pos += hapd->conf->ssid.ssid_len;
 433
 434         /* Supported rates */
 435         pos = hostapd_eid_supp_rates(hapd, pos);
 436
 437         /* DS Params */
 438         pos = hostapd_eid_ds_params(hapd, pos);
 439
 440         pos = hostapd_eid_country(hapd, pos, epos - pos);
 441
 442         /* Power Constraint element */
 443         pos = hostapd_eid_pwr_constraint(hapd, pos);
 444
 445         /* CSA IE */
 446         csa_pos = hostapd_eid_csa(hapd, pos);
 447         if (csa_pos != pos)
 448                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 449         pos = csa_pos;
 450
 451         /* ERP Information element */
 452         pos = hostapd_eid_erp_info(hapd, pos);
 453
 454         /* Extended supported rates */
 455         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 456
 457         /* RSN, MDIE */
 458         if (hapd->conf->wpa != WPA_PROTO_WPA)
 459                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 460
 461         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 462
 463         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 464
 465         /* eCSA IE */
 466         csa_pos = hostapd_eid_ecsa(hapd, pos);
 467         if (csa_pos != pos)
 468                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 469         pos = csa_pos;
 470
 471         pos = hostapd_eid_supported_op_classes(hapd, pos);
 472
 473 #ifdef CONFIG_IEEE80211N
 474         /* Secondary Channel Offset element */
 475         /* TODO: The standard doesn't specify a position for this element. */
 476         pos = hostapd_eid_secondary_channel(hapd, pos);
 477
 478         pos = hostapd_eid_ht_capabilities(hapd, pos);
 479         pos = hostapd_eid_ht_operation(hapd, pos);
 480 #endif /* CONFIG_IEEE80211N */
 481
 482         pos = hostapd_eid_ext_capab(hapd, pos);
 483
 484         pos = hostapd_eid_time_adv(hapd, pos);
 485         pos = hostapd_eid_time_zone(hapd, pos);
 486
 487         pos = hostapd_eid_interworking(hapd, pos);
 488         pos = hostapd_eid_adv_proto(hapd, pos);
 489         pos = hostapd_eid_roaming_consortium(hapd, pos);
 490
 491 #ifdef CONFIG_FST
 492         if (hapd->iface->fst_ies) {
 493                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 494                           wpabuf_len(hapd->iface->fst_ies));
 495                 pos += wpabuf_len(hapd->iface->fst_ies);
 496         }
 497 #endif /* CONFIG_FST */
 498
 499 #ifdef CONFIG_IEEE80211AC
 500         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 501                 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
 502                 pos = hostapd_eid_vht_operation(hapd, pos);
 503                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 504                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 505         }
 506 #endif /* CONFIG_IEEE80211AC */
 507
 508         pos = hostapd_eid_fils_indic(hapd, pos, 0);
 509
 510 #ifdef CONFIG_IEEE80211AX
 511         if (hapd->iconf->ieee80211ax) {
 512                 pos = hostapd_eid_he_capab(hapd, pos);
 513                 pos = hostapd_eid_he_operation(hapd, pos);
 514                 pos = hostapd_eid_he_mu_edca_parameter_set(hapd, pos);
 515         }
 516 #endif /* CONFIG_IEEE80211AX */
 517
 518 #ifdef CONFIG_IEEE80211AC
 519         if (hapd->conf->vendor_vht)
 520                 pos = hostapd_eid_vendor_vht(hapd, pos);
 521 #endif /* CONFIG_IEEE80211AC */
 522
 523         /* WPA */
 524         if (hapd->conf->wpa == WPA_PROTO_WPA)
 525                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 526
 527         /* Wi-Fi Alliance WMM */
 528         pos = hostapd_eid_wmm(hapd, pos);
 529
 530 #ifdef CONFIG_WPS
 531         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 532                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 533                           wpabuf_len(hapd->wps_probe_resp_ie));
 534                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 535         }
 536 #endif /* CONFIG_WPS */
 537
 538 #ifdef CONFIG_P2P
 539         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 540             hapd->p2p_probe_resp_ie) {
 541                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 542                           wpabuf_len(hapd->p2p_probe_resp_ie));
 543                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 544         }
 545 #endif /* CONFIG_P2P */
 546 #ifdef CONFIG_P2P_MANAGER
 547         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 548             P2P_MANAGE)
 549                 pos = hostapd_eid_p2p_manage(hapd, pos);
 550 #endif /* CONFIG_P2P_MANAGER */
 551
 552 #ifdef CONFIG_HS20
 553         pos = hostapd_eid_hs20_indication(hapd, pos);
 554         pos = hostapd_eid_osen(hapd, pos);
 555 #endif /* CONFIG_HS20 */
 556
 557         pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 558         pos = hostapd_eid_owe_trans(hapd, pos, (u8 *) resp + buflen - pos);
 559
 560         if (hapd->conf->vendor_elements) {
 561                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 562                           wpabuf_len(hapd->conf->vendor_elements));
 563                 pos += wpabuf_len(hapd->conf->vendor_elements);
 564         }
 565
 566         *resp_len = pos - (u8 *) resp;
 567         return (u8 *) resp;
 568 }
 569
 570
 571 enum ssid_match_result {
 572         NO_SSID_MATCH,
 573         EXACT_SSID_MATCH,
 574         WILDCARD_SSID_MATCH
 575 };
 576
 577 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 578                                          const u8 *ssid, size_t ssid_len,
 579                                          const u8 *ssid_list,
 580                                          size_t ssid_list_len)
 581 {
 582         const u8 *pos, *end;
 583         int wildcard = 0;
 584
 585         if (ssid_len == 0)
 586                 wildcard = 1;
 587         if (ssid_len == hapd->conf->ssid.ssid_len &&
 588             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 589                 return EXACT_SSID_MATCH;
 590
 591         if (ssid_list == NULL)
 592                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 593
 594         pos = ssid_list;
 595         end = ssid_list + ssid_list_len;
 596         while (end - pos >= 1) {
 597                 if (2 + pos[1] > end - pos)
 598                         break;
 599                 if (pos[1] == 0)
 600                         wildcard = 1;
 601                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 602                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 603                         return EXACT_SSID_MATCH;
 604                 pos += 2 + pos[1];
 605         }
 606
 607         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 608 }
 609
 610
 611 void sta_track_expire(struct hostapd_iface *iface, int force)
 612 {
 613         struct os_reltime now;
 614         struct hostapd_sta_info *info;
 615
 616         if (!iface->num_sta_seen)
 617                 return;
 618
 619         os_get_reltime(&now);
 620         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 621                                      list))) {
 622                 if (!force &&
 623                     !os_reltime_expired(&now, &info->last_seen,
 624                                         iface->conf->track_sta_max_age))
 625                         break;
 626                 force = 0;
 627
 628                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 629                            MACSTR, iface->bss[0]->conf->iface,
 630                            MAC2STR(info->addr));
 631                 dl_list_del(&info->list);
 632                 iface->num_sta_seen--;
 633                 sta_track_del(info);
 634         }
 635 }
 636
 637
 638 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 639                                                const u8 *addr)
 640 {
 641         struct hostapd_sta_info *info;
 642
 643         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 644                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 645                         return info;
 646
 647         return NULL;
 648 }
 649
 650
 651 void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal)
 652 {
 653         struct hostapd_sta_info *info;
 654
 655         info = sta_track_get(iface, addr);
 656         if (info) {
 657                 /* Move the most recent entry to the end of the list */
 658                 dl_list_del(&info->list);
 659                 dl_list_add_tail(&iface->sta_seen, &info->list);
 660                 os_get_reltime(&info->last_seen);
 661                 info->ssi_signal = ssi_signal;
 662                 return;
 663         }
 664
 665         /* Add a new entry */
 666         info = os_zalloc(sizeof(*info));
 667         if (info == NULL)
 668                 return;
 669         os_memcpy(info->addr, addr, ETH_ALEN);
 670         os_get_reltime(&info->last_seen);
 671         info->ssi_signal = ssi_signal;
 672
 673         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 674                 /* Expire oldest entry to make room for a new one */
 675                 sta_track_expire(iface, 1);
 676         }
 677
 678         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 679                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 680         dl_list_add_tail(&iface->sta_seen, &info->list);
 681         iface->num_sta_seen++;
 682 }
 683
 684
 685 struct hostapd_data *
 686 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 687                   const char *ifname)
 688 {
 689         struct hapd_interfaces *interfaces = iface->interfaces;
 690         size_t i, j;
 691
 692         for (i = 0; i < interfaces->count; i++) {
 693                 struct hostapd_data *hapd = NULL;
 694
 695                 iface = interfaces->iface[i];
 696                 for (j = 0; j < iface->num_bss; j++) {
 697                         hapd = iface->bss[j];
 698                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 699                                 break;
 700                         hapd = NULL;
 701                 }
 702
 703                 if (hapd && sta_track_get(iface, addr))
 704                         return hapd;
 705         }
 706
 707         return NULL;
 708 }
 709
 710
 711 #ifdef CONFIG_TAXONOMY
 712 void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr,
 713                                    struct wpabuf **probe_ie_taxonomy)
 714 {
 715         struct hostapd_sta_info *info;
 716
 717         info = sta_track_get(iface, addr);
 718         if (!info)
 719                 return;
 720
 721         wpabuf_free(*probe_ie_taxonomy);
 722         *probe_ie_taxonomy = info->probe_ie_taxonomy;
 723         info->probe_ie_taxonomy = NULL;
 724 }
 725 #endif /* CONFIG_TAXONOMY */
 726
 727
 728 void handle_probe_req(struct hostapd_data *hapd,
 729                       const struct ieee80211_mgmt *mgmt, size_t len,
 730                       int ssi_signal)
 731 {
 732         u8 *resp;
 733         struct ieee802_11_elems elems;
 734         const u8 *ie;
 735         size_t ie_len;
 736         size_t i, resp_len;
 737         int noack;
 738         enum ssid_match_result res;
 739         int ret;
 740         u16 csa_offs[2];
 741         size_t csa_offs_len;
 742         u32 session_timeout, acct_interim_interval;
 743         struct vlan_description vlan_id;
 744         struct hostapd_sta_wpa_psk_short *psk = NULL;
 745         char *identity = NULL;
 746         char *radius_cui = NULL;
 747
 748         if (len < IEEE80211_HDRLEN)
 749                 return;
 750         ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
 751         if (hapd->iconf->track_sta_max_num)
 752                 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
 753         ie_len = len - IEEE80211_HDRLEN;
 754
 755         ret = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len,
 756                                          &session_timeout,
 757                                          &acct_interim_interval, &vlan_id,
 758                                          &psk, &identity, &radius_cui, 1);
 759         if (ret == HOSTAPD_ACL_REJECT) {
 760                 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 761                         "Ignore Probe Request frame from " MACSTR
 762                         " due to ACL reject ", MAC2STR(mgmt->sa));
 763                 return;
 764         }
 765
 766         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 767                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 768                                             mgmt->sa, mgmt->da, mgmt->bssid,
 769                                             ie, ie_len, ssi_signal) > 0)
 770                         return;
 771
 772         if (!hapd->conf->send_probe_response)
 773                 return;
 774
 775         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 776                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 777                            MAC2STR(mgmt->sa));
 778                 return;
 779         }
 780
 781         if ((!elems.ssid || !elems.supp_rates)) {
 782                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 783                            "without SSID or supported rates element",
 784                            MAC2STR(mgmt->sa));
 785                 return;
 786         }
 787
 788         /*
 789          * No need to reply if the Probe Request frame was sent on an adjacent
 790          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 791          * AP with dot11RadioMeasurementActivated set to true, but strictly
 792          * speaking does not allow such ignoring of Probe Request frames if
 793          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 794          * number of unnecessary Probe Response frames for cases where the STA
 795          * is less likely to see them (Probe Request frame sent on a
 796          * neighboring, but partially overlapping, channel).
 797          */
 798         if (elems.ds_params &&
 799             hapd->iface->current_mode &&
 800             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 801              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 802             hapd->iconf->channel != elems.ds_params[0]) {
 803                 wpa_printf(MSG_DEBUG,
 804                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 805                            hapd->iconf->channel, elems.ds_params[0]);
 806                 return;
 807         }
 808
 809 #ifdef CONFIG_P2P
 810         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 811                 struct wpabuf *wps;
 812                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 813                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 814                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 815                                    "due to mismatch with Requested Device "
 816                                    "Type");
 817                         wpabuf_free(wps);
 818                         return;
 819                 }
 820                 wpabuf_free(wps);
 821         }
 822
 823         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 824                 struct wpabuf *p2p;
 825                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 826                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 827                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 828                                    "due to mismatch with Device ID");
 829                         wpabuf_free(p2p);
 830                         return;
 831                 }
 832                 wpabuf_free(p2p);
 833         }
 834 #endif /* CONFIG_P2P */
 835
 836         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 837             elems.ssid_list_len == 0) {
 838                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 839                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 840                 return;
 841         }
 842
 843 #ifdef CONFIG_P2P
 844         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 845             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 846             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 847                       P2P_WILDCARD_SSID_LEN) == 0) {
 848                 /* Process P2P Wildcard SSID like Wildcard SSID */
 849                 elems.ssid_len = 0;
 850         }
 851 #endif /* CONFIG_P2P */
 852
 853 #ifdef CONFIG_TAXONOMY
 854         {
 855                 struct sta_info *sta;
 856                 struct hostapd_sta_info *info;
 857
 858                 if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) {
 859                         taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len);
 860                 } else if ((info = sta_track_get(hapd->iface,
 861                                                  mgmt->sa)) != NULL) {
 862                         taxonomy_hostapd_sta_info_probe_req(hapd, info,
 863                                                             ie, ie_len);
 864                 }
 865         }
 866 #endif /* CONFIG_TAXONOMY */
 867
 868         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 869                          elems.ssid_list, elems.ssid_list_len);
 870         if (res == NO_SSID_MATCH) {
 871                 if (!(mgmt->da[0] & 0x01)) {
 872                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 873                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 874                                    MAC2STR(mgmt->sa),
 875                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 876                                    MAC2STR(mgmt->da),
 877                                    elems.ssid_list ? " (SSID list)" : "");
 878                 }
 879                 return;
 880         }
 881
 882 #ifdef CONFIG_INTERWORKING
 883         if (hapd->conf->interworking &&
 884             elems.interworking && elems.interworking_len >= 1) {
 885                 u8 ant = elems.interworking[0] & 0x0f;
 886                 if (ant != INTERWORKING_ANT_WILDCARD &&
 887                     ant != hapd->conf->access_network_type) {
 888                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 889                                    " for mismatching ANT %u ignored",
 890                                    MAC2STR(mgmt->sa), ant);
 891                         return;
 892                 }
 893         }
 894
 895         if (hapd->conf->interworking && elems.interworking &&
 896             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 897                 const u8 *hessid;
 898                 if (elems.interworking_len == 7)
 899                         hessid = elems.interworking + 1;
 900                 else
 901                         hessid = elems.interworking + 1 + 2;
 902                 if (!is_broadcast_ether_addr(hessid) &&
 903                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 904                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 905                                    " for mismatching HESSID " MACSTR
 906                                    " ignored",
 907                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 908                         return;
 909                 }
 910         }
 911 #endif /* CONFIG_INTERWORKING */
 912
 913 #ifdef CONFIG_P2P
 914         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 915             supp_rates_11b_only(&elems)) {
 916                 /* Indicates support for 11b rates only */
 917                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 918                            MACSTR " with only 802.11b rates",
 919                            MAC2STR(mgmt->sa));
 920                 return;
 921         }
 922 #endif /* CONFIG_P2P */
 923
 924         /* TODO: verify that supp_rates contains at least one matching rate
 925          * with AP configuration */
 926
 927         if (hapd->conf->no_probe_resp_if_seen_on &&
 928             is_multicast_ether_addr(mgmt->da) &&
 929             is_multicast_ether_addr(mgmt->bssid) &&
 930             sta_track_seen_on(hapd->iface, mgmt->sa,
 931                               hapd->conf->no_probe_resp_if_seen_on)) {
 932                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 933                            " since STA has been seen on %s",
 934                            hapd->conf->iface, MAC2STR(mgmt->sa),
 935                            hapd->conf->no_probe_resp_if_seen_on);
 936                 return;
 937         }
 938
 939         if (hapd->conf->no_probe_resp_if_max_sta &&
 940             is_multicast_ether_addr(mgmt->da) &&
 941             is_multicast_ether_addr(mgmt->bssid) &&
 942             hapd->num_sta >= hapd->conf->max_num_sta &&
 943             !ap_get_sta(hapd, mgmt->sa)) {
 944                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 945                            " since no room for additional STA",
 946                            hapd->conf->iface, MAC2STR(mgmt->sa));
 947                 return;
 948         }
 949
 950 #ifdef CONFIG_TESTING_OPTIONS
 951         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 952             drand48() < hapd->iconf->ignore_probe_probability) {
 953                 wpa_printf(MSG_INFO,
 954                            "TESTING: ignoring probe request from " MACSTR,
 955                            MAC2STR(mgmt->sa));
 956                 return;
 957         }
 958 #endif /* CONFIG_TESTING_OPTIONS */
 959
 960         wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, RX_PROBE_REQUEST "sa=" MACSTR
 961                      " signal=%d", MAC2STR(mgmt->sa), ssi_signal);
 962
 963         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 964                                       &resp_len);
 965         if (resp == NULL)
 966                 return;
 967
 968         /*
 969          * If this is a broadcast probe request, apply no ack policy to avoid
 970          * excessive retries.
 971          */
 972         noack = !!(res == WILDCARD_SSID_MATCH &&
 973                    is_broadcast_ether_addr(mgmt->da));
 974
 975         csa_offs_len = 0;
 976         if (hapd->csa_in_progress) {
 977                 if (hapd->cs_c_off_proberesp)
 978                         csa_offs[csa_offs_len++] =
 979                                 hapd->cs_c_off_proberesp;
 980
 981                 if (hapd->cs_c_off_ecsa_proberesp)
 982                         csa_offs[csa_offs_len++] =
 983                                 hapd->cs_c_off_ecsa_proberesp;
 984         }
 985
 986         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 987                                         csa_offs_len ? csa_offs : NULL,
 988                                         csa_offs_len);
 989
 990         if (ret < 0)
 991                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 992
 993         os_free(resp);
 994
 995         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 996                    "SSID", MAC2STR(mgmt->sa),
 997                    elems.ssid_len == 0 ? "broadcast" : "our");
 998 }
 999
1000
1001 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
1002                                         size_t *resp_len)
1003 {
1004         /* check probe response offloading caps and print warnings */
1005         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
1006                 return NULL;
1007
1008 #ifdef CONFIG_WPS
1009         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
1010             (!(hapd->iface->probe_resp_offloads &
1011                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
1012                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
1013                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
1014                            "Probe Response while not supporting this");
1015 #endif /* CONFIG_WPS */
1016
1017 #ifdef CONFIG_P2P
1018         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
1019             !(hapd->iface->probe_resp_offloads &
1020               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
1021                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
1022                            "Probe Response while not supporting this");
1023 #endif  /* CONFIG_P2P */
1024
1025         if (hapd->conf->interworking &&
1026             !(hapd->iface->probe_resp_offloads &
1027               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
1028                 wpa_printf(MSG_WARNING, "Device is trying to offload "
1029                            "Interworking Probe Response while not supporting "
1030                            "this");
1031
1032         /* Generate a Probe Response template for the non-P2P case */
1033         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
1034 }
1035
1036 #endif /* NEED_AP_MLME */
1037
1038
1039 void sta_track_del(struct hostapd_sta_info *info)
1040 {
1041 #ifdef CONFIG_TAXONOMY
1042         wpabuf_free(info->probe_ie_taxonomy);
1043         info->probe_ie_taxonomy = NULL;
1044 #endif /* CONFIG_TAXONOMY */
1045         os_free(info);
1046 }
1047
1048
1049 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
1050                                struct wpa_driver_ap_params *params)
1051 {
1052         struct ieee80211_mgmt *head = NULL;
1053         u8 *tail = NULL;
1054         size_t head_len = 0, tail_len = 0;
1055         u8 *resp = NULL;
1056         size_t resp_len = 0;
1057 #ifdef NEED_AP_MLME
1058         u16 capab_info;
1059         u8 *pos, *tailpos, *csa_pos;
1060
1061 #define BEACON_HEAD_BUF_SIZE 256
1062 #define BEACON_TAIL_BUF_SIZE 512
1063         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
1064         tail_len = BEACON_TAIL_BUF_SIZE;
1065 #ifdef CONFIG_WPS
1066         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
1067                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
1068 #endif /* CONFIG_WPS */
1069 #ifdef CONFIG_P2P
1070         if (hapd->p2p_beacon_ie)
1071                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
1072 #endif /* CONFIG_P2P */
1073 #ifdef CONFIG_FST
1074         if (hapd->iface->fst_ies)
1075                 tail_len += wpabuf_len(hapd->iface->fst_ies);
1076 #endif /* CONFIG_FST */
1077         if (hapd->conf->vendor_elements)
1078                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
1079
1080 #ifdef CONFIG_IEEE80211AC
1081         if (hapd->conf->vendor_vht) {
1082                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
1083                         2 + sizeof(struct ieee80211_vht_operation);
1084         }
1085 #endif /* CONFIG_IEEE80211AC */
1086
1087 #ifdef CONFIG_IEEE80211AX
1088         if (hapd->iconf->ieee80211ax) {
1089                 tail_len += 3 + sizeof(struct ieee80211_he_capabilities) +
1090                         3 + sizeof(struct ieee80211_he_operation) +
1091                         3 + sizeof(struct ieee80211_he_mu_edca_parameter_set);
1092         }
1093 #endif /* CONFIG_IEEE80211AX */
1094
1095         tail_len += hostapd_mbo_ie_len(hapd);
1096         tail_len += hostapd_eid_owe_trans_len(hapd);
1097
1098         tailpos = tail = os_malloc(tail_len);
1099         if (head == NULL || tail == NULL) {
1100                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
1101                 os_free(head);
1102                 os_free(tail);
1103                 return -1;
1104         }
1105
1106         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1107                                            WLAN_FC_STYPE_BEACON);
1108         head->duration = host_to_le16(0);
1109         os_memset(head->da, 0xff, ETH_ALEN);
1110
1111         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1112         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1113         head->u.beacon.beacon_int =
1114                 host_to_le16(hapd->iconf->beacon_int);
1115
1116         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1117         capab_info = hostapd_own_capab_info(hapd);
1118         head->u.beacon.capab_info = host_to_le16(capab_info);
1119         pos = &head->u.beacon.variable[0];
1120
1121         /* SSID */
1122         *pos++ = WLAN_EID_SSID;
1123         if (hapd->conf->ignore_broadcast_ssid == 2) {
1124                 /* clear the data, but keep the correct length of the SSID */
1125                 *pos++ = hapd->conf->ssid.ssid_len;
1126                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1127                 pos += hapd->conf->ssid.ssid_len;
1128         } else if (hapd->conf->ignore_broadcast_ssid) {
1129                 *pos++ = 0; /* empty SSID */
1130         } else {
1131                 *pos++ = hapd->conf->ssid.ssid_len;
1132                 os_memcpy(pos, hapd->conf->ssid.ssid,
1133                           hapd->conf->ssid.ssid_len);
1134                 pos += hapd->conf->ssid.ssid_len;
1135         }
1136
1137         /* Supported rates */
1138         pos = hostapd_eid_supp_rates(hapd, pos);
1139
1140         /* DS Params */
1141         pos = hostapd_eid_ds_params(hapd, pos);
1142
1143         head_len = pos - (u8 *) head;
1144
1145         tailpos = hostapd_eid_country(hapd, tailpos,
1146                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1147
1148         /* Power Constraint element */
1149         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1150
1151         /* CSA IE */
1152         csa_pos = hostapd_eid_csa(hapd, tailpos);
1153         if (csa_pos != tailpos)
1154                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1155         tailpos = csa_pos;
1156
1157         /* ERP Information element */
1158         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1159
1160         /* Extended supported rates */
1161         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1162
1163         /* RSN, MDIE */
1164         if (hapd->conf->wpa != WPA_PROTO_WPA)
1165                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1166                                           tail + BEACON_TAIL_BUF_SIZE -
1167                                           tailpos);
1168
1169         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1170                                                tail + BEACON_TAIL_BUF_SIZE -
1171                                                tailpos);
1172
1173         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1174                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1175
1176         /* eCSA IE */
1177         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1178         if (csa_pos != tailpos)
1179                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1180         tailpos = csa_pos;
1181
1182         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1183
1184 #ifdef CONFIG_IEEE80211N
1185         /* Secondary Channel Offset element */
1186         /* TODO: The standard doesn't specify a position for this element. */
1187         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1188
1189         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1190         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1191 #endif /* CONFIG_IEEE80211N */
1192
1193         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1194
1195         /*
1196          * TODO: Time Advertisement element should only be included in some
1197          * DTIM Beacon frames.
1198          */
1199         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1200
1201         tailpos = hostapd_eid_interworking(hapd, tailpos);
1202         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1203         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1204
1205 #ifdef CONFIG_FST
1206         if (hapd->iface->fst_ies) {
1207                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1208                           wpabuf_len(hapd->iface->fst_ies));
1209                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1210         }
1211 #endif /* CONFIG_FST */
1212
1213 #ifdef CONFIG_IEEE80211AC
1214         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1215                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1216                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1217                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1218                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1219         }
1220 #endif /* CONFIG_IEEE80211AC */
1221
1222         tailpos = hostapd_eid_fils_indic(hapd, tailpos, 0);
1223
1224 #ifdef CONFIG_IEEE80211AX
1225         if (hapd->iconf->ieee80211ax) {
1226                 tailpos = hostapd_eid_he_capab(hapd, tailpos);
1227                 tailpos = hostapd_eid_he_operation(hapd, tailpos);
1228                 tailpos = hostapd_eid_he_mu_edca_parameter_set(hapd, tailpos);
1229         }
1230 #endif /* CONFIG_IEEE80211AX */
1231
1232 #ifdef CONFIG_IEEE80211AC
1233         if (hapd->conf->vendor_vht)
1234                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1235 #endif /* CONFIG_IEEE80211AC */
1236
1237         /* WPA */
1238         if (hapd->conf->wpa == WPA_PROTO_WPA)
1239                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1240                                           tail + BEACON_TAIL_BUF_SIZE -
1241                                           tailpos);
1242
1243         /* Wi-Fi Alliance WMM */
1244         tailpos = hostapd_eid_wmm(hapd, tailpos);
1245
1246 #ifdef CONFIG_WPS
1247         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1248                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1249                           wpabuf_len(hapd->wps_beacon_ie));
1250                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1251         }
1252 #endif /* CONFIG_WPS */
1253
1254 #ifdef CONFIG_P2P
1255         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1256                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1257                           wpabuf_len(hapd->p2p_beacon_ie));
1258                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1259         }
1260 #endif /* CONFIG_P2P */
1261 #ifdef CONFIG_P2P_MANAGER
1262         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1263             P2P_MANAGE)
1264                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1265 #endif /* CONFIG_P2P_MANAGER */
1266
1267 #ifdef CONFIG_HS20
1268         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1269         tailpos = hostapd_eid_osen(hapd, tailpos);
1270 #endif /* CONFIG_HS20 */
1271
1272         tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1273         tailpos = hostapd_eid_owe_trans(hapd, tailpos,
1274                                         tail + tail_len - tailpos);
1275
1276         if (hapd->conf->vendor_elements) {
1277                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1278                           wpabuf_len(hapd->conf->vendor_elements));
1279                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1280         }
1281
1282         tail_len = tailpos > tail ? tailpos - tail : 0;
1283
1284         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1285 #endif /* NEED_AP_MLME */
1286
1287         os_memset(params, 0, sizeof(*params));
1288         params->head = (u8 *) head;
1289         params->head_len = head_len;
1290         params->tail = tail;
1291         params->tail_len = tail_len;
1292         params->proberesp = resp;
1293         params->proberesp_len = resp_len;
1294         params->dtim_period = hapd->conf->dtim_period;
1295         params->beacon_int = hapd->iconf->beacon_int;
1296         params->basic_rates = hapd->iface->basic_rates;
1297         params->beacon_rate = hapd->iconf->beacon_rate;
1298         params->rate_type = hapd->iconf->rate_type;
1299         params->ssid = hapd->conf->ssid.ssid;
1300         params->ssid_len = hapd->conf->ssid.ssid_len;
1301         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1302             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1303                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1304                         hapd->conf->rsn_pairwise;
1305         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1306                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1307         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1308                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1309         params->group_cipher = hapd->conf->wpa_group;
1310         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1311         params->auth_algs = hapd->conf->auth_algs;
1312         params->wpa_version = hapd->conf->wpa;
1313         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1314                 (hapd->conf->ieee802_1x &&
1315                  (hapd->conf->default_wep_key_len ||
1316                   hapd->conf->individual_wep_key_len));
1317         switch (hapd->conf->ignore_broadcast_ssid) {
1318         case 0:
1319                 params->hide_ssid = NO_SSID_HIDING;
1320                 break;
1321         case 1:
1322                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1323                 break;
1324         case 2:
1325                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1326                 break;
1327         }
1328         params->isolate = hapd->conf->isolate;
1329         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1330 #ifdef NEED_AP_MLME
1331         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1332                                 ERP_INFO_USE_PROTECTION);
1333         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1334                 hapd->iconf->preamble == SHORT_PREAMBLE;
1335         if (hapd->iface->current_mode &&
1336             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1337                 params->short_slot_time =
1338                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1339         else
1340                 params->short_slot_time = -1;
1341         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1342                 params->ht_opmode = -1;
1343         else
1344                 params->ht_opmode = hapd->iface->ht_op_mode;
1345 #endif /* NEED_AP_MLME */
1346         params->interworking = hapd->conf->interworking;
1347         if (hapd->conf->interworking &&
1348             !is_zero_ether_addr(hapd->conf->hessid))
1349                 params->hessid = hapd->conf->hessid;
1350         params->access_network_type = hapd->conf->access_network_type;
1351         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1352 #ifdef CONFIG_P2P
1353         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1354 #endif /* CONFIG_P2P */
1355 #ifdef CONFIG_HS20
1356         params->disable_dgaf = hapd->conf->disable_dgaf;
1357         if (hapd->conf->osen) {
1358                 params->privacy = 1;
1359                 params->osen = 1;
1360         }
1361 #endif /* CONFIG_HS20 */
1362         params->multicast_to_unicast = hapd->conf->multicast_to_unicast;
1363         params->pbss = hapd->conf->pbss;
1364
1365         if (hapd->conf->ftm_responder) {
1366                 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_FTM_RESPONDER) {
1367                         params->ftm_responder = 1;
1368                         params->lci = hapd->iface->conf->lci;
1369                         params->civic = hapd->iface->conf->civic;
1370                 } else {
1371                         wpa_printf(MSG_WARNING,
1372                                    "Not configuring FTM responder as the driver doesn't advertise support for it");
1373                 }
1374         }
1375
1376         return 0;
1377 }
1378
1379
1380 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1381 {
1382         os_free(params->tail);
1383         params->tail = NULL;
1384         os_free(params->head);
1385         params->head = NULL;
1386         os_free(params->proberesp);
1387         params->proberesp = NULL;
1388 }
1389
1390
1391 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1392 {
1393         struct wpa_driver_ap_params params;
1394         struct hostapd_freq_params freq;
1395         struct hostapd_iface *iface = hapd->iface;
1396         struct hostapd_config *iconf = iface->conf;
1397         struct wpabuf *beacon, *proberesp, *assocresp;
1398         int res, ret = -1;
1399
1400         if (hapd->csa_in_progress) {
1401                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1402                 return -1;
1403         }
1404
1405         hapd->beacon_set_done = 1;
1406
1407         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1408                 return -1;
1409
1410         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1411             0)
1412                 goto fail;
1413
1414         params.beacon_ies = beacon;
1415         params.proberesp_ies = proberesp;
1416         params.assocresp_ies = assocresp;
1417         params.reenable = hapd->reenable_beacon;
1418         hapd->reenable_beacon = 0;
1419
1420         if (iface->current_mode &&
1421             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1422                                     iconf->channel, iconf->ieee80211n,
1423                                     iconf->ieee80211ac,
1424                                     iconf->secondary_channel,
1425                                     iconf->vht_oper_chwidth,
1426                                     iconf->vht_oper_centr_freq_seg0_idx,
1427                                     iconf->vht_oper_centr_freq_seg1_idx,
1428                                     iface->current_mode->vht_capab) == 0)
1429                 params.freq = &freq;
1430
1431         res = hostapd_drv_set_ap(hapd, &params);
1432         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1433         if (res)
1434                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1435         else
1436                 ret = 0;
1437 fail:
1438         ieee802_11_free_ap_params(&params);
1439         return ret;
1440 }
1441
1442
1443 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1444 {
1445         size_t i;
1446         int ret = 0;
1447
1448         for (i = 0; i < iface->num_bss; i++) {
1449                 if (iface->bss[i]->started &&
1450                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1451                         ret = -1;
1452         }
1453
1454         return ret;
1455 }
1456
1457
1458 /* only update beacons if started */
1459 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1460 {
1461         size_t i;
1462         int ret = 0;
1463
1464         for (i = 0; i < iface->num_bss; i++) {
1465                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1466                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1467                         ret = -1;
1468         }
1469
1470         return ret;
1471 }
1472
1473 #endif /* CONFIG_NATIVE_WINDOWS */