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               (hapd->conf->osen && !hapd->conf->wpa)))
 461                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 462
 463         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 464
 465         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 466
 467         /* eCSA IE */
 468         csa_pos = hostapd_eid_ecsa(hapd, pos);
 469         if (csa_pos != pos)
 470                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 471         pos = csa_pos;
 472
 473         pos = hostapd_eid_supported_op_classes(hapd, pos);
 474
 475 #ifdef CONFIG_IEEE80211N
 476         /* Secondary Channel Offset element */
 477         /* TODO: The standard doesn't specify a position for this element. */
 478         pos = hostapd_eid_secondary_channel(hapd, pos);
 479
 480         pos = hostapd_eid_ht_capabilities(hapd, pos);
 481         pos = hostapd_eid_ht_operation(hapd, pos);
 482 #endif /* CONFIG_IEEE80211N */
 483
 484         pos = hostapd_eid_ext_capab(hapd, pos);
 485
 486         pos = hostapd_eid_time_adv(hapd, pos);
 487         pos = hostapd_eid_time_zone(hapd, pos);
 488
 489         pos = hostapd_eid_interworking(hapd, pos);
 490         pos = hostapd_eid_adv_proto(hapd, pos);
 491         pos = hostapd_eid_roaming_consortium(hapd, pos);
 492
 493 #ifdef CONFIG_FST
 494         if (hapd->iface->fst_ies) {
 495                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 496                           wpabuf_len(hapd->iface->fst_ies));
 497                 pos += wpabuf_len(hapd->iface->fst_ies);
 498         }
 499 #endif /* CONFIG_FST */
 500
 501 #ifdef CONFIG_IEEE80211AC
 502         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 503                 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
 504                 pos = hostapd_eid_vht_operation(hapd, pos);
 505                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 506                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 507         }
 508 #endif /* CONFIG_IEEE80211AC */
 509
 510         pos = hostapd_eid_fils_indic(hapd, pos, 0);
 511
 512 #ifdef CONFIG_IEEE80211AX
 513         if (hapd->iconf->ieee80211ax) {
 514                 pos = hostapd_eid_he_capab(hapd, pos, IEEE80211_MODE_AP);
 515                 pos = hostapd_eid_he_operation(hapd, pos);
 516                 pos = hostapd_eid_he_mu_edca_parameter_set(hapd, pos);
 517                 pos = hostapd_eid_spatial_reuse(hapd, pos);
 518         }
 519 #endif /* CONFIG_IEEE80211AX */
 520
 521 #ifdef CONFIG_IEEE80211AC
 522         if (hapd->conf->vendor_vht)
 523                 pos = hostapd_eid_vendor_vht(hapd, pos);
 524 #endif /* CONFIG_IEEE80211AC */
 525
 526         /* WPA */
 527         if (hapd->conf->wpa == WPA_PROTO_WPA ||
 528             (hapd->conf->osen && !hapd->conf->wpa))
 529                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 530
 531         /* Wi-Fi Alliance WMM */
 532         pos = hostapd_eid_wmm(hapd, pos);
 533
 534 #ifdef CONFIG_WPS
 535         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 536                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 537                           wpabuf_len(hapd->wps_probe_resp_ie));
 538                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 539         }
 540 #endif /* CONFIG_WPS */
 541
 542 #ifdef CONFIG_P2P
 543         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 544             hapd->p2p_probe_resp_ie) {
 545                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 546                           wpabuf_len(hapd->p2p_probe_resp_ie));
 547                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 548         }
 549 #endif /* CONFIG_P2P */
 550 #ifdef CONFIG_P2P_MANAGER
 551         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 552             P2P_MANAGE)
 553                 pos = hostapd_eid_p2p_manage(hapd, pos);
 554 #endif /* CONFIG_P2P_MANAGER */
 555
 556 #ifdef CONFIG_HS20
 557         pos = hostapd_eid_hs20_indication(hapd, pos);
 558 #endif /* CONFIG_HS20 */
 559
 560         pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 561         pos = hostapd_eid_owe_trans(hapd, pos, (u8 *) resp + buflen - pos);
 562
 563         if (hapd->conf->vendor_elements) {
 564                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 565                           wpabuf_len(hapd->conf->vendor_elements));
 566                 pos += wpabuf_len(hapd->conf->vendor_elements);
 567         }
 568
 569         *resp_len = pos - (u8 *) resp;
 570         return (u8 *) resp;
 571 }
 572
 573
 574 enum ssid_match_result {
 575         NO_SSID_MATCH,
 576         EXACT_SSID_MATCH,
 577         WILDCARD_SSID_MATCH
 578 };
 579
 580 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 581                                          const u8 *ssid, size_t ssid_len,
 582                                          const u8 *ssid_list,
 583                                          size_t ssid_list_len)
 584 {
 585         const u8 *pos, *end;
 586         int wildcard = 0;
 587
 588         if (ssid_len == 0)
 589                 wildcard = 1;
 590         if (ssid_len == hapd->conf->ssid.ssid_len &&
 591             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 592                 return EXACT_SSID_MATCH;
 593
 594         if (ssid_list == NULL)
 595                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 596
 597         pos = ssid_list;
 598         end = ssid_list + ssid_list_len;
 599         while (end - pos >= 2) {
 600                 if (2 + pos[1] > end - pos)
 601                         break;
 602                 if (pos[1] == 0)
 603                         wildcard = 1;
 604                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 605                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 606                         return EXACT_SSID_MATCH;
 607                 pos += 2 + pos[1];
 608         }
 609
 610         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 611 }
 612
 613
 614 void sta_track_expire(struct hostapd_iface *iface, int force)
 615 {
 616         struct os_reltime now;
 617         struct hostapd_sta_info *info;
 618
 619         if (!iface->num_sta_seen)
 620                 return;
 621
 622         os_get_reltime(&now);
 623         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 624                                      list))) {
 625                 if (!force &&
 626                     !os_reltime_expired(&now, &info->last_seen,
 627                                         iface->conf->track_sta_max_age))
 628                         break;
 629                 force = 0;
 630
 631                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 632                            MACSTR, iface->bss[0]->conf->iface,
 633                            MAC2STR(info->addr));
 634                 dl_list_del(&info->list);
 635                 iface->num_sta_seen--;
 636                 sta_track_del(info);
 637         }
 638 }
 639
 640
 641 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 642                                                const u8 *addr)
 643 {
 644         struct hostapd_sta_info *info;
 645
 646         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 647                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 648                         return info;
 649
 650         return NULL;
 651 }
 652
 653
 654 void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal)
 655 {
 656         struct hostapd_sta_info *info;
 657
 658         info = sta_track_get(iface, addr);
 659         if (info) {
 660                 /* Move the most recent entry to the end of the list */
 661                 dl_list_del(&info->list);
 662                 dl_list_add_tail(&iface->sta_seen, &info->list);
 663                 os_get_reltime(&info->last_seen);
 664                 info->ssi_signal = ssi_signal;
 665                 return;
 666         }
 667
 668         /* Add a new entry */
 669         info = os_zalloc(sizeof(*info));
 670         if (info == NULL)
 671                 return;
 672         os_memcpy(info->addr, addr, ETH_ALEN);
 673         os_get_reltime(&info->last_seen);
 674         info->ssi_signal = ssi_signal;
 675
 676         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 677                 /* Expire oldest entry to make room for a new one */
 678                 sta_track_expire(iface, 1);
 679         }
 680
 681         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 682                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 683         dl_list_add_tail(&iface->sta_seen, &info->list);
 684         iface->num_sta_seen++;
 685 }
 686
 687
 688 struct hostapd_data *
 689 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 690                   const char *ifname)
 691 {
 692         struct hapd_interfaces *interfaces = iface->interfaces;
 693         size_t i, j;
 694
 695         for (i = 0; i < interfaces->count; i++) {
 696                 struct hostapd_data *hapd = NULL;
 697
 698                 iface = interfaces->iface[i];
 699                 for (j = 0; j < iface->num_bss; j++) {
 700                         hapd = iface->bss[j];
 701                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 702                                 break;
 703                         hapd = NULL;
 704                 }
 705
 706                 if (hapd && sta_track_get(iface, addr))
 707                         return hapd;
 708         }
 709
 710         return NULL;
 711 }
 712
 713
 714 #ifdef CONFIG_TAXONOMY
 715 void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr,
 716                                    struct wpabuf **probe_ie_taxonomy)
 717 {
 718         struct hostapd_sta_info *info;
 719
 720         info = sta_track_get(iface, addr);
 721         if (!info)
 722                 return;
 723
 724         wpabuf_free(*probe_ie_taxonomy);
 725         *probe_ie_taxonomy = info->probe_ie_taxonomy;
 726         info->probe_ie_taxonomy = NULL;
 727 }
 728 #endif /* CONFIG_TAXONOMY */
 729
 730
 731 void handle_probe_req(struct hostapd_data *hapd,
 732                       const struct ieee80211_mgmt *mgmt, size_t len,
 733                       int ssi_signal)
 734 {
 735         u8 *resp;
 736         struct ieee802_11_elems elems;
 737         const u8 *ie;
 738         size_t ie_len;
 739         size_t i, resp_len;
 740         int noack;
 741         enum ssid_match_result res;
 742         int ret;
 743         u16 csa_offs[2];
 744         size_t csa_offs_len;
 745         u32 session_timeout, acct_interim_interval;
 746         struct vlan_description vlan_id;
 747         struct hostapd_sta_wpa_psk_short *psk = NULL;
 748         char *identity = NULL;
 749         char *radius_cui = NULL;
 750
 751         if (len < IEEE80211_HDRLEN)
 752                 return;
 753         ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
 754         if (hapd->iconf->track_sta_max_num)
 755                 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
 756         ie_len = len - IEEE80211_HDRLEN;
 757
 758         ret = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len,
 759                                          &session_timeout,
 760                                          &acct_interim_interval, &vlan_id,
 761                                          &psk, &identity, &radius_cui, 1);
 762         if (ret == HOSTAPD_ACL_REJECT) {
 763                 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 764                         "Ignore Probe Request frame from " MACSTR
 765                         " due to ACL reject ", MAC2STR(mgmt->sa));
 766                 return;
 767         }
 768
 769         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 770                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 771                                             mgmt->sa, mgmt->da, mgmt->bssid,
 772                                             ie, ie_len, ssi_signal) > 0)
 773                         return;
 774
 775         if (!hapd->conf->send_probe_response)
 776                 return;
 777
 778         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 779                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 780                            MAC2STR(mgmt->sa));
 781                 return;
 782         }
 783
 784         if ((!elems.ssid || !elems.supp_rates)) {
 785                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 786                            "without SSID or supported rates element",
 787                            MAC2STR(mgmt->sa));
 788                 return;
 789         }
 790
 791         /*
 792          * No need to reply if the Probe Request frame was sent on an adjacent
 793          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 794          * AP with dot11RadioMeasurementActivated set to true, but strictly
 795          * speaking does not allow such ignoring of Probe Request frames if
 796          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 797          * number of unnecessary Probe Response frames for cases where the STA
 798          * is less likely to see them (Probe Request frame sent on a
 799          * neighboring, but partially overlapping, channel).
 800          */
 801         if (elems.ds_params &&
 802             hapd->iface->current_mode &&
 803             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 804              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 805             hapd->iconf->channel != elems.ds_params[0]) {
 806                 wpa_printf(MSG_DEBUG,
 807                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 808                            hapd->iconf->channel, elems.ds_params[0]);
 809                 return;
 810         }
 811
 812 #ifdef CONFIG_P2P
 813         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 814                 struct wpabuf *wps;
 815                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 816                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 817                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 818                                    "due to mismatch with Requested Device "
 819                                    "Type");
 820                         wpabuf_free(wps);
 821                         return;
 822                 }
 823                 wpabuf_free(wps);
 824         }
 825
 826         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 827                 struct wpabuf *p2p;
 828                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 829                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 830                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 831                                    "due to mismatch with Device ID");
 832                         wpabuf_free(p2p);
 833                         return;
 834                 }
 835                 wpabuf_free(p2p);
 836         }
 837 #endif /* CONFIG_P2P */
 838
 839         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 840             elems.ssid_list_len == 0) {
 841                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 842                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 843                 return;
 844         }
 845
 846 #ifdef CONFIG_P2P
 847         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 848             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 849             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 850                       P2P_WILDCARD_SSID_LEN) == 0) {
 851                 /* Process P2P Wildcard SSID like Wildcard SSID */
 852                 elems.ssid_len = 0;
 853         }
 854 #endif /* CONFIG_P2P */
 855
 856 #ifdef CONFIG_TAXONOMY
 857         {
 858                 struct sta_info *sta;
 859                 struct hostapd_sta_info *info;
 860
 861                 if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) {
 862                         taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len);
 863                 } else if ((info = sta_track_get(hapd->iface,
 864                                                  mgmt->sa)) != NULL) {
 865                         taxonomy_hostapd_sta_info_probe_req(hapd, info,
 866                                                             ie, ie_len);
 867                 }
 868         }
 869 #endif /* CONFIG_TAXONOMY */
 870
 871         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 872                          elems.ssid_list, elems.ssid_list_len);
 873         if (res == NO_SSID_MATCH) {
 874                 if (!(mgmt->da[0] & 0x01)) {
 875                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 876                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 877                                    MAC2STR(mgmt->sa),
 878                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 879                                    MAC2STR(mgmt->da),
 880                                    elems.ssid_list ? " (SSID list)" : "");
 881                 }
 882                 return;
 883         }
 884
 885 #ifdef CONFIG_INTERWORKING
 886         if (hapd->conf->interworking &&
 887             elems.interworking && elems.interworking_len >= 1) {
 888                 u8 ant = elems.interworking[0] & 0x0f;
 889                 if (ant != INTERWORKING_ANT_WILDCARD &&
 890                     ant != hapd->conf->access_network_type) {
 891                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 892                                    " for mismatching ANT %u ignored",
 893                                    MAC2STR(mgmt->sa), ant);
 894                         return;
 895                 }
 896         }
 897
 898         if (hapd->conf->interworking && elems.interworking &&
 899             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 900                 const u8 *hessid;
 901                 if (elems.interworking_len == 7)
 902                         hessid = elems.interworking + 1;
 903                 else
 904                         hessid = elems.interworking + 1 + 2;
 905                 if (!is_broadcast_ether_addr(hessid) &&
 906                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 907                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 908                                    " for mismatching HESSID " MACSTR
 909                                    " ignored",
 910                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 911                         return;
 912                 }
 913         }
 914 #endif /* CONFIG_INTERWORKING */
 915
 916 #ifdef CONFIG_P2P
 917         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 918             supp_rates_11b_only(&elems)) {
 919                 /* Indicates support for 11b rates only */
 920                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 921                            MACSTR " with only 802.11b rates",
 922                            MAC2STR(mgmt->sa));
 923                 return;
 924         }
 925 #endif /* CONFIG_P2P */
 926
 927         /* TODO: verify that supp_rates contains at least one matching rate
 928          * with AP configuration */
 929
 930         if (hapd->conf->no_probe_resp_if_seen_on &&
 931             is_multicast_ether_addr(mgmt->da) &&
 932             is_multicast_ether_addr(mgmt->bssid) &&
 933             sta_track_seen_on(hapd->iface, mgmt->sa,
 934                               hapd->conf->no_probe_resp_if_seen_on)) {
 935                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 936                            " since STA has been seen on %s",
 937                            hapd->conf->iface, MAC2STR(mgmt->sa),
 938                            hapd->conf->no_probe_resp_if_seen_on);
 939                 return;
 940         }
 941
 942         if (hapd->conf->no_probe_resp_if_max_sta &&
 943             is_multicast_ether_addr(mgmt->da) &&
 944             is_multicast_ether_addr(mgmt->bssid) &&
 945             hapd->num_sta >= hapd->conf->max_num_sta &&
 946             !ap_get_sta(hapd, mgmt->sa)) {
 947                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 948                            " since no room for additional STA",
 949                            hapd->conf->iface, MAC2STR(mgmt->sa));
 950                 return;
 951         }
 952
 953 #ifdef CONFIG_TESTING_OPTIONS
 954         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 955             drand48() < hapd->iconf->ignore_probe_probability) {
 956                 wpa_printf(MSG_INFO,
 957                            "TESTING: ignoring probe request from " MACSTR,
 958                            MAC2STR(mgmt->sa));
 959                 return;
 960         }
 961 #endif /* CONFIG_TESTING_OPTIONS */
 962
 963         wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, RX_PROBE_REQUEST "sa=" MACSTR
 964                      " signal=%d", MAC2STR(mgmt->sa), ssi_signal);
 965
 966         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 967                                       &resp_len);
 968         if (resp == NULL)
 969                 return;
 970
 971         /*
 972          * If this is a broadcast probe request, apply no ack policy to avoid
 973          * excessive retries.
 974          */
 975         noack = !!(res == WILDCARD_SSID_MATCH &&
 976                    is_broadcast_ether_addr(mgmt->da));
 977
 978         csa_offs_len = 0;
 979         if (hapd->csa_in_progress) {
 980                 if (hapd->cs_c_off_proberesp)
 981                         csa_offs[csa_offs_len++] =
 982                                 hapd->cs_c_off_proberesp;
 983
 984                 if (hapd->cs_c_off_ecsa_proberesp)
 985                         csa_offs[csa_offs_len++] =
 986                                 hapd->cs_c_off_ecsa_proberesp;
 987         }
 988
 989         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 990                                         csa_offs_len ? csa_offs : NULL,
 991                                         csa_offs_len);
 992
 993         if (ret < 0)
 994                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 995
 996         os_free(resp);
 997
 998         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 999                    "SSID", MAC2STR(mgmt->sa),
1000                    elems.ssid_len == 0 ? "broadcast" : "our");
1001 }
1002
1003
1004 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
1005                                         size_t *resp_len)
1006 {
1007         /* check probe response offloading caps and print warnings */
1008         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
1009                 return NULL;
1010
1011 #ifdef CONFIG_WPS
1012         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
1013             (!(hapd->iface->probe_resp_offloads &
1014                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
1015                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
1016                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
1017                            "Probe Response while not supporting this");
1018 #endif /* CONFIG_WPS */
1019
1020 #ifdef CONFIG_P2P
1021         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
1022             !(hapd->iface->probe_resp_offloads &
1023               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
1024                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
1025                            "Probe Response while not supporting this");
1026 #endif  /* CONFIG_P2P */
1027
1028         if (hapd->conf->interworking &&
1029             !(hapd->iface->probe_resp_offloads &
1030               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
1031                 wpa_printf(MSG_WARNING, "Device is trying to offload "
1032                            "Interworking Probe Response while not supporting "
1033                            "this");
1034
1035         /* Generate a Probe Response template for the non-P2P case */
1036         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
1037 }
1038
1039 #endif /* NEED_AP_MLME */
1040
1041
1042 void sta_track_del(struct hostapd_sta_info *info)
1043 {
1044 #ifdef CONFIG_TAXONOMY
1045         wpabuf_free(info->probe_ie_taxonomy);
1046         info->probe_ie_taxonomy = NULL;
1047 #endif /* CONFIG_TAXONOMY */
1048         os_free(info);
1049 }
1050
1051
1052 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
1053                                struct wpa_driver_ap_params *params)
1054 {
1055         struct ieee80211_mgmt *head = NULL;
1056         u8 *tail = NULL;
1057         size_t head_len = 0, tail_len = 0;
1058         u8 *resp = NULL;
1059         size_t resp_len = 0;
1060 #ifdef NEED_AP_MLME
1061         u16 capab_info;
1062         u8 *pos, *tailpos, *csa_pos;
1063
1064 #define BEACON_HEAD_BUF_SIZE 256
1065 #define BEACON_TAIL_BUF_SIZE 512
1066         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
1067         tail_len = BEACON_TAIL_BUF_SIZE;
1068 #ifdef CONFIG_WPS
1069         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
1070                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
1071 #endif /* CONFIG_WPS */
1072 #ifdef CONFIG_P2P
1073         if (hapd->p2p_beacon_ie)
1074                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
1075 #endif /* CONFIG_P2P */
1076 #ifdef CONFIG_FST
1077         if (hapd->iface->fst_ies)
1078                 tail_len += wpabuf_len(hapd->iface->fst_ies);
1079 #endif /* CONFIG_FST */
1080         if (hapd->conf->vendor_elements)
1081                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
1082
1083 #ifdef CONFIG_IEEE80211AC
1084         if (hapd->conf->vendor_vht) {
1085                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
1086                         2 + sizeof(struct ieee80211_vht_operation);
1087         }
1088 #endif /* CONFIG_IEEE80211AC */
1089
1090 #ifdef CONFIG_IEEE80211AX
1091         if (hapd->iconf->ieee80211ax) {
1092                 tail_len += 3 + sizeof(struct ieee80211_he_capabilities) +
1093                         3 + sizeof(struct ieee80211_he_operation) +
1094                         3 + sizeof(struct ieee80211_he_mu_edca_parameter_set) +
1095                         3 + sizeof(struct ieee80211_spatial_reuse);
1096         }
1097 #endif /* CONFIG_IEEE80211AX */
1098
1099         tail_len += hostapd_mbo_ie_len(hapd);
1100         tail_len += hostapd_eid_owe_trans_len(hapd);
1101
1102         tailpos = tail = os_malloc(tail_len);
1103         if (head == NULL || tail == NULL) {
1104                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
1105                 os_free(head);
1106                 os_free(tail);
1107                 return -1;
1108         }
1109
1110         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1111                                            WLAN_FC_STYPE_BEACON);
1112         head->duration = host_to_le16(0);
1113         os_memset(head->da, 0xff, ETH_ALEN);
1114
1115         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1116         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1117         head->u.beacon.beacon_int =
1118                 host_to_le16(hapd->iconf->beacon_int);
1119
1120         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1121         capab_info = hostapd_own_capab_info(hapd);
1122         head->u.beacon.capab_info = host_to_le16(capab_info);
1123         pos = &head->u.beacon.variable[0];
1124
1125         /* SSID */
1126         *pos++ = WLAN_EID_SSID;
1127         if (hapd->conf->ignore_broadcast_ssid == 2) {
1128                 /* clear the data, but keep the correct length of the SSID */
1129                 *pos++ = hapd->conf->ssid.ssid_len;
1130                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1131                 pos += hapd->conf->ssid.ssid_len;
1132         } else if (hapd->conf->ignore_broadcast_ssid) {
1133                 *pos++ = 0; /* empty SSID */
1134         } else {
1135                 *pos++ = hapd->conf->ssid.ssid_len;
1136                 os_memcpy(pos, hapd->conf->ssid.ssid,
1137                           hapd->conf->ssid.ssid_len);
1138                 pos += hapd->conf->ssid.ssid_len;
1139         }
1140
1141         /* Supported rates */
1142         pos = hostapd_eid_supp_rates(hapd, pos);
1143
1144         /* DS Params */
1145         pos = hostapd_eid_ds_params(hapd, pos);
1146
1147         head_len = pos - (u8 *) head;
1148
1149         tailpos = hostapd_eid_country(hapd, tailpos,
1150                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1151
1152         /* Power Constraint element */
1153         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1154
1155         /* CSA IE */
1156         csa_pos = hostapd_eid_csa(hapd, tailpos);
1157         if (csa_pos != tailpos)
1158                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1159         tailpos = csa_pos;
1160
1161         /* ERP Information element */
1162         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1163
1164         /* Extended supported rates */
1165         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1166
1167         /* RSN, MDIE */
1168         if (!(hapd->conf->wpa == WPA_PROTO_WPA ||
1169               (hapd->conf->osen && !hapd->conf->wpa)))
1170                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1171                                           tail + BEACON_TAIL_BUF_SIZE -
1172                                           tailpos);
1173
1174         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1175                                                tail + BEACON_TAIL_BUF_SIZE -
1176                                                tailpos);
1177
1178         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1179                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1180
1181         /* eCSA IE */
1182         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1183         if (csa_pos != tailpos)
1184                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1185         tailpos = csa_pos;
1186
1187         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1188
1189 #ifdef CONFIG_IEEE80211N
1190         /* Secondary Channel Offset element */
1191         /* TODO: The standard doesn't specify a position for this element. */
1192         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1193
1194         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1195         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1196 #endif /* CONFIG_IEEE80211N */
1197
1198         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1199
1200         /*
1201          * TODO: Time Advertisement element should only be included in some
1202          * DTIM Beacon frames.
1203          */
1204         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1205
1206         tailpos = hostapd_eid_interworking(hapd, tailpos);
1207         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1208         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1209
1210 #ifdef CONFIG_FST
1211         if (hapd->iface->fst_ies) {
1212                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1213                           wpabuf_len(hapd->iface->fst_ies));
1214                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1215         }
1216 #endif /* CONFIG_FST */
1217
1218 #ifdef CONFIG_IEEE80211AC
1219         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1220                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1221                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1222                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1223                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1224         }
1225 #endif /* CONFIG_IEEE80211AC */
1226
1227         tailpos = hostapd_eid_fils_indic(hapd, tailpos, 0);
1228
1229 #ifdef CONFIG_IEEE80211AX
1230         if (hapd->iconf->ieee80211ax) {
1231                 tailpos = hostapd_eid_he_capab(hapd, tailpos,
1232                                                IEEE80211_MODE_AP);
1233                 tailpos = hostapd_eid_he_operation(hapd, tailpos);
1234                 tailpos = hostapd_eid_he_mu_edca_parameter_set(hapd, tailpos);
1235                 tailpos = hostapd_eid_spatial_reuse(hapd, tailpos);
1236         }
1237 #endif /* CONFIG_IEEE80211AX */
1238
1239 #ifdef CONFIG_IEEE80211AC
1240         if (hapd->conf->vendor_vht)
1241                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1242 #endif /* CONFIG_IEEE80211AC */
1243
1244         /* WPA */
1245         if (hapd->conf->wpa == WPA_PROTO_WPA ||
1246             (hapd->conf->osen && !hapd->conf->wpa))
1247                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1248                                           tail + BEACON_TAIL_BUF_SIZE -
1249                                           tailpos);
1250
1251         /* Wi-Fi Alliance WMM */
1252         tailpos = hostapd_eid_wmm(hapd, tailpos);
1253
1254 #ifdef CONFIG_WPS
1255         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1256                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1257                           wpabuf_len(hapd->wps_beacon_ie));
1258                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1259         }
1260 #endif /* CONFIG_WPS */
1261
1262 #ifdef CONFIG_P2P
1263         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1264                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1265                           wpabuf_len(hapd->p2p_beacon_ie));
1266                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1267         }
1268 #endif /* CONFIG_P2P */
1269 #ifdef CONFIG_P2P_MANAGER
1270         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1271             P2P_MANAGE)
1272                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1273 #endif /* CONFIG_P2P_MANAGER */
1274
1275 #ifdef CONFIG_HS20
1276         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1277 #endif /* CONFIG_HS20 */
1278
1279         tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1280         tailpos = hostapd_eid_owe_trans(hapd, tailpos,
1281                                         tail + tail_len - tailpos);
1282
1283         if (hapd->conf->vendor_elements) {
1284                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1285                           wpabuf_len(hapd->conf->vendor_elements));
1286                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1287         }
1288
1289         tail_len = tailpos > tail ? tailpos - tail : 0;
1290
1291         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1292 #endif /* NEED_AP_MLME */
1293
1294         os_memset(params, 0, sizeof(*params));
1295         params->head = (u8 *) head;
1296         params->head_len = head_len;
1297         params->tail = tail;
1298         params->tail_len = tail_len;
1299         params->proberesp = resp;
1300         params->proberesp_len = resp_len;
1301         params->dtim_period = hapd->conf->dtim_period;
1302         params->beacon_int = hapd->iconf->beacon_int;
1303         params->basic_rates = hapd->iface->basic_rates;
1304         params->beacon_rate = hapd->iconf->beacon_rate;
1305         params->rate_type = hapd->iconf->rate_type;
1306         params->ssid = hapd->conf->ssid.ssid;
1307         params->ssid_len = hapd->conf->ssid.ssid_len;
1308         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1309             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1310                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1311                         hapd->conf->rsn_pairwise;
1312         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1313                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1314         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1315                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1316         params->group_cipher = hapd->conf->wpa_group;
1317         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1318         params->auth_algs = hapd->conf->auth_algs;
1319         params->wpa_version = hapd->conf->wpa;
1320         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1321                 (hapd->conf->ieee802_1x &&
1322                  (hapd->conf->default_wep_key_len ||
1323                   hapd->conf->individual_wep_key_len));
1324         switch (hapd->conf->ignore_broadcast_ssid) {
1325         case 0:
1326                 params->hide_ssid = NO_SSID_HIDING;
1327                 break;
1328         case 1:
1329                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1330                 break;
1331         case 2:
1332                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1333                 break;
1334         }
1335         params->isolate = hapd->conf->isolate;
1336         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1337 #ifdef NEED_AP_MLME
1338         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1339                                 ERP_INFO_USE_PROTECTION);
1340         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1341                 hapd->iconf->preamble == SHORT_PREAMBLE;
1342         if (hapd->iface->current_mode &&
1343             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1344                 params->short_slot_time =
1345                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1346         else
1347                 params->short_slot_time = -1;
1348         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1349                 params->ht_opmode = -1;
1350         else
1351                 params->ht_opmode = hapd->iface->ht_op_mode;
1352 #endif /* NEED_AP_MLME */
1353         params->interworking = hapd->conf->interworking;
1354         if (hapd->conf->interworking &&
1355             !is_zero_ether_addr(hapd->conf->hessid))
1356                 params->hessid = hapd->conf->hessid;
1357         params->access_network_type = hapd->conf->access_network_type;
1358         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1359 #ifdef CONFIG_P2P
1360         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1361 #endif /* CONFIG_P2P */
1362 #ifdef CONFIG_HS20
1363         params->disable_dgaf = hapd->conf->disable_dgaf;
1364         if (hapd->conf->osen) {
1365                 params->privacy = 1;
1366                 params->osen = 1;
1367         }
1368 #endif /* CONFIG_HS20 */
1369         params->multicast_to_unicast = hapd->conf->multicast_to_unicast;
1370         params->pbss = hapd->conf->pbss;
1371
1372         if (hapd->conf->ftm_responder) {
1373                 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_FTM_RESPONDER) {
1374                         params->ftm_responder = 1;
1375                         params->lci = hapd->iface->conf->lci;
1376                         params->civic = hapd->iface->conf->civic;
1377                 } else {
1378                         wpa_printf(MSG_WARNING,
1379                                    "Not configuring FTM responder as the driver doesn't advertise support for it");
1380                 }
1381         }
1382
1383         return 0;
1384 }
1385
1386
1387 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1388 {
1389         os_free(params->tail);
1390         params->tail = NULL;
1391         os_free(params->head);
1392         params->head = NULL;
1393         os_free(params->proberesp);
1394         params->proberesp = NULL;
1395 }
1396
1397
1398 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1399 {
1400         struct wpa_driver_ap_params params;
1401         struct hostapd_freq_params freq;
1402         struct hostapd_iface *iface = hapd->iface;
1403         struct hostapd_config *iconf = iface->conf;
1404         struct hostapd_hw_modes *cmode = iface->current_mode;
1405         struct wpabuf *beacon, *proberesp, *assocresp;
1406         int res, ret = -1;
1407
1408         if (hapd->csa_in_progress) {
1409                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1410                 return -1;
1411         }
1412
1413         hapd->beacon_set_done = 1;
1414
1415         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1416                 return -1;
1417
1418         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1419             0)
1420                 goto fail;
1421
1422         params.beacon_ies = beacon;
1423         params.proberesp_ies = proberesp;
1424         params.assocresp_ies = assocresp;
1425         params.reenable = hapd->reenable_beacon;
1426         hapd->reenable_beacon = 0;
1427
1428         if (cmode &&
1429             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1430                                     iconf->channel, iconf->ieee80211n,
1431                                     iconf->ieee80211ac, iconf->ieee80211ax,
1432                                     iconf->secondary_channel,
1433                                     hostapd_get_oper_chwidth(iconf),
1434                                     hostapd_get_oper_centr_freq_seg0_idx(iconf),
1435                                     hostapd_get_oper_centr_freq_seg1_idx(iconf),
1436                                     cmode->vht_capab,
1437                                     &cmode->he_capab[IEEE80211_MODE_AP]) == 0)
1438                 params.freq = &freq;
1439
1440         res = hostapd_drv_set_ap(hapd, &params);
1441         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1442         if (res)
1443                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1444         else
1445                 ret = 0;
1446 fail:
1447         ieee802_11_free_ap_params(&params);
1448         return ret;
1449 }
1450
1451
1452 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1453 {
1454         size_t i;
1455         int ret = 0;
1456
1457         for (i = 0; i < iface->num_bss; i++) {
1458                 if (iface->bss[i]->started &&
1459                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1460                         ret = -1;
1461         }
1462
1463         return ret;
1464 }
1465
1466
1467 /* only update beacons if started */
1468 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1469 {
1470         size_t i;
1471         int ret = 0;
1472
1473         for (i = 0; i < iface->num_bss; i++) {
1474                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1475                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1476                         ret = -1;
1477         }
1478
1479         return ret;
1480 }
1481
1482 #endif /* CONFIG_NATIVE_WINDOWS */