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         }
 402 #endif /* CONFIG_IEEE80211AX */
 403
 404         buflen += hostapd_mbo_ie_len(hapd);
 405         buflen += hostapd_eid_owe_trans_len(hapd);
 406
 407         resp = os_zalloc(buflen);
 408         if (resp == NULL)
 409                 return NULL;
 410
 411         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 412
 413         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 414                                            WLAN_FC_STYPE_PROBE_RESP);
 415         if (req)
 416                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 417         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 418
 419         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 420         resp->u.probe_resp.beacon_int =
 421                 host_to_le16(hapd->iconf->beacon_int);
 422
 423         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 424         resp->u.probe_resp.capab_info =
 425                 host_to_le16(hostapd_own_capab_info(hapd));
 426
 427         pos = resp->u.probe_resp.variable;
 428         *pos++ = WLAN_EID_SSID;
 429         *pos++ = hapd->conf->ssid.ssid_len;
 430         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 431         pos += hapd->conf->ssid.ssid_len;
 432
 433         /* Supported rates */
 434         pos = hostapd_eid_supp_rates(hapd, pos);
 435
 436         /* DS Params */
 437         pos = hostapd_eid_ds_params(hapd, pos);
 438
 439         pos = hostapd_eid_country(hapd, pos, epos - pos);
 440
 441         /* Power Constraint element */
 442         pos = hostapd_eid_pwr_constraint(hapd, pos);
 443
 444         /* CSA IE */
 445         csa_pos = hostapd_eid_csa(hapd, pos);
 446         if (csa_pos != pos)
 447                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 448         pos = csa_pos;
 449
 450         /* ERP Information element */
 451         pos = hostapd_eid_erp_info(hapd, pos);
 452
 453         /* Extended supported rates */
 454         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 455
 456         /* RSN, MDIE */
 457         if (hapd->conf->wpa != WPA_PROTO_WPA)
 458                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 459
 460         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 461
 462         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 463
 464         /* eCSA IE */
 465         csa_pos = hostapd_eid_ecsa(hapd, pos);
 466         if (csa_pos != pos)
 467                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 468         pos = csa_pos;
 469
 470         pos = hostapd_eid_supported_op_classes(hapd, pos);
 471
 472 #ifdef CONFIG_IEEE80211N
 473         /* Secondary Channel Offset element */
 474         /* TODO: The standard doesn't specify a position for this element. */
 475         pos = hostapd_eid_secondary_channel(hapd, pos);
 476
 477         pos = hostapd_eid_ht_capabilities(hapd, pos);
 478         pos = hostapd_eid_ht_operation(hapd, pos);
 479 #endif /* CONFIG_IEEE80211N */
 480
 481         pos = hostapd_eid_ext_capab(hapd, pos);
 482
 483         pos = hostapd_eid_time_adv(hapd, pos);
 484         pos = hostapd_eid_time_zone(hapd, pos);
 485
 486         pos = hostapd_eid_interworking(hapd, pos);
 487         pos = hostapd_eid_adv_proto(hapd, pos);
 488         pos = hostapd_eid_roaming_consortium(hapd, pos);
 489
 490 #ifdef CONFIG_FST
 491         if (hapd->iface->fst_ies) {
 492                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 493                           wpabuf_len(hapd->iface->fst_ies));
 494                 pos += wpabuf_len(hapd->iface->fst_ies);
 495         }
 496 #endif /* CONFIG_FST */
 497
 498 #ifdef CONFIG_IEEE80211AC
 499         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 500                 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
 501                 pos = hostapd_eid_vht_operation(hapd, pos);
 502                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 503                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 504         }
 505 #endif /* CONFIG_IEEE80211AC */
 506
 507         pos = hostapd_eid_fils_indic(hapd, pos, 0);
 508
 509 #ifdef CONFIG_IEEE80211AX
 510         if (hapd->iconf->ieee80211ax) {
 511                 pos = hostapd_eid_he_capab(hapd, pos);
 512                 pos = hostapd_eid_he_operation(hapd, pos);
 513         }
 514 #endif /* CONFIG_IEEE80211AX */
 515
 516 #ifdef CONFIG_IEEE80211AC
 517         if (hapd->conf->vendor_vht)
 518                 pos = hostapd_eid_vendor_vht(hapd, pos);
 519 #endif /* CONFIG_IEEE80211AC */
 520
 521         /* WPA */
 522         if (hapd->conf->wpa == WPA_PROTO_WPA)
 523                 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 524
 525         /* Wi-Fi Alliance WMM */
 526         pos = hostapd_eid_wmm(hapd, pos);
 527
 528 #ifdef CONFIG_WPS
 529         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 530                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 531                           wpabuf_len(hapd->wps_probe_resp_ie));
 532                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 533         }
 534 #endif /* CONFIG_WPS */
 535
 536 #ifdef CONFIG_P2P
 537         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 538             hapd->p2p_probe_resp_ie) {
 539                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 540                           wpabuf_len(hapd->p2p_probe_resp_ie));
 541                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 542         }
 543 #endif /* CONFIG_P2P */
 544 #ifdef CONFIG_P2P_MANAGER
 545         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 546             P2P_MANAGE)
 547                 pos = hostapd_eid_p2p_manage(hapd, pos);
 548 #endif /* CONFIG_P2P_MANAGER */
 549
 550 #ifdef CONFIG_HS20
 551         pos = hostapd_eid_hs20_indication(hapd, pos);
 552         pos = hostapd_eid_osen(hapd, pos);
 553 #endif /* CONFIG_HS20 */
 554
 555         pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 556         pos = hostapd_eid_owe_trans(hapd, pos, (u8 *) resp + buflen - pos);
 557
 558         if (hapd->conf->vendor_elements) {
 559                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 560                           wpabuf_len(hapd->conf->vendor_elements));
 561                 pos += wpabuf_len(hapd->conf->vendor_elements);
 562         }
 563
 564         *resp_len = pos - (u8 *) resp;
 565         return (u8 *) resp;
 566 }
 567
 568
 569 enum ssid_match_result {
 570         NO_SSID_MATCH,
 571         EXACT_SSID_MATCH,
 572         WILDCARD_SSID_MATCH
 573 };
 574
 575 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 576                                          const u8 *ssid, size_t ssid_len,
 577                                          const u8 *ssid_list,
 578                                          size_t ssid_list_len)
 579 {
 580         const u8 *pos, *end;
 581         int wildcard = 0;
 582
 583         if (ssid_len == 0)
 584                 wildcard = 1;
 585         if (ssid_len == hapd->conf->ssid.ssid_len &&
 586             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 587                 return EXACT_SSID_MATCH;
 588
 589         if (ssid_list == NULL)
 590                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 591
 592         pos = ssid_list;
 593         end = ssid_list + ssid_list_len;
 594         while (end - pos >= 1) {
 595                 if (2 + pos[1] > end - pos)
 596                         break;
 597                 if (pos[1] == 0)
 598                         wildcard = 1;
 599                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 600                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 601                         return EXACT_SSID_MATCH;
 602                 pos += 2 + pos[1];
 603         }
 604
 605         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 606 }
 607
 608
 609 void sta_track_expire(struct hostapd_iface *iface, int force)
 610 {
 611         struct os_reltime now;
 612         struct hostapd_sta_info *info;
 613
 614         if (!iface->num_sta_seen)
 615                 return;
 616
 617         os_get_reltime(&now);
 618         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 619                                      list))) {
 620                 if (!force &&
 621                     !os_reltime_expired(&now, &info->last_seen,
 622                                         iface->conf->track_sta_max_age))
 623                         break;
 624                 force = 0;
 625
 626                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 627                            MACSTR, iface->bss[0]->conf->iface,
 628                            MAC2STR(info->addr));
 629                 dl_list_del(&info->list);
 630                 iface->num_sta_seen--;
 631                 sta_track_del(info);
 632         }
 633 }
 634
 635
 636 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 637                                                const u8 *addr)
 638 {
 639         struct hostapd_sta_info *info;
 640
 641         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 642                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 643                         return info;
 644
 645         return NULL;
 646 }
 647
 648
 649 void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal)
 650 {
 651         struct hostapd_sta_info *info;
 652
 653         info = sta_track_get(iface, addr);
 654         if (info) {
 655                 /* Move the most recent entry to the end of the list */
 656                 dl_list_del(&info->list);
 657                 dl_list_add_tail(&iface->sta_seen, &info->list);
 658                 os_get_reltime(&info->last_seen);
 659                 info->ssi_signal = ssi_signal;
 660                 return;
 661         }
 662
 663         /* Add a new entry */
 664         info = os_zalloc(sizeof(*info));
 665         if (info == NULL)
 666                 return;
 667         os_memcpy(info->addr, addr, ETH_ALEN);
 668         os_get_reltime(&info->last_seen);
 669         info->ssi_signal = ssi_signal;
 670
 671         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 672                 /* Expire oldest entry to make room for a new one */
 673                 sta_track_expire(iface, 1);
 674         }
 675
 676         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 677                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 678         dl_list_add_tail(&iface->sta_seen, &info->list);
 679         iface->num_sta_seen++;
 680 }
 681
 682
 683 struct hostapd_data *
 684 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 685                   const char *ifname)
 686 {
 687         struct hapd_interfaces *interfaces = iface->interfaces;
 688         size_t i, j;
 689
 690         for (i = 0; i < interfaces->count; i++) {
 691                 struct hostapd_data *hapd = NULL;
 692
 693                 iface = interfaces->iface[i];
 694                 for (j = 0; j < iface->num_bss; j++) {
 695                         hapd = iface->bss[j];
 696                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 697                                 break;
 698                         hapd = NULL;
 699                 }
 700
 701                 if (hapd && sta_track_get(iface, addr))
 702                         return hapd;
 703         }
 704
 705         return NULL;
 706 }
 707
 708
 709 #ifdef CONFIG_TAXONOMY
 710 void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr,
 711                                    struct wpabuf **probe_ie_taxonomy)
 712 {
 713         struct hostapd_sta_info *info;
 714
 715         info = sta_track_get(iface, addr);
 716         if (!info)
 717                 return;
 718
 719         wpabuf_free(*probe_ie_taxonomy);
 720         *probe_ie_taxonomy = info->probe_ie_taxonomy;
 721         info->probe_ie_taxonomy = NULL;
 722 }
 723 #endif /* CONFIG_TAXONOMY */
 724
 725
 726 void handle_probe_req(struct hostapd_data *hapd,
 727                       const struct ieee80211_mgmt *mgmt, size_t len,
 728                       int ssi_signal)
 729 {
 730         u8 *resp;
 731         struct ieee802_11_elems elems;
 732         const u8 *ie;
 733         size_t ie_len;
 734         size_t i, resp_len;
 735         int noack;
 736         enum ssid_match_result res;
 737         int ret;
 738         u16 csa_offs[2];
 739         size_t csa_offs_len;
 740         u32 session_timeout, acct_interim_interval;
 741         struct vlan_description vlan_id;
 742         struct hostapd_sta_wpa_psk_short *psk = NULL;
 743         char *identity = NULL;
 744         char *radius_cui = NULL;
 745
 746         if (len < IEEE80211_HDRLEN)
 747                 return;
 748         ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
 749         if (hapd->iconf->track_sta_max_num)
 750                 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
 751         ie_len = len - IEEE80211_HDRLEN;
 752
 753         ret = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len,
 754                                          &session_timeout,
 755                                          &acct_interim_interval, &vlan_id,
 756                                          &psk, &identity, &radius_cui, 1);
 757         if (ret == HOSTAPD_ACL_REJECT) {
 758                 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 759                         "Ignore Probe Request frame from " MACSTR
 760                         " due to ACL reject ", MAC2STR(mgmt->sa));
 761                 return;
 762         }
 763
 764         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 765                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 766                                             mgmt->sa, mgmt->da, mgmt->bssid,
 767                                             ie, ie_len, ssi_signal) > 0)
 768                         return;
 769
 770         if (!hapd->iconf->send_probe_response)
 771                 return;
 772
 773         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 774                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 775                            MAC2STR(mgmt->sa));
 776                 return;
 777         }
 778
 779         if ((!elems.ssid || !elems.supp_rates)) {
 780                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 781                            "without SSID or supported rates element",
 782                            MAC2STR(mgmt->sa));
 783                 return;
 784         }
 785
 786         /*
 787          * No need to reply if the Probe Request frame was sent on an adjacent
 788          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 789          * AP with dot11RadioMeasurementActivated set to true, but strictly
 790          * speaking does not allow such ignoring of Probe Request frames if
 791          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 792          * number of unnecessary Probe Response frames for cases where the STA
 793          * is less likely to see them (Probe Request frame sent on a
 794          * neighboring, but partially overlapping, channel).
 795          */
 796         if (elems.ds_params &&
 797             hapd->iface->current_mode &&
 798             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 799              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 800             hapd->iconf->channel != elems.ds_params[0]) {
 801                 wpa_printf(MSG_DEBUG,
 802                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 803                            hapd->iconf->channel, elems.ds_params[0]);
 804                 return;
 805         }
 806
 807 #ifdef CONFIG_P2P
 808         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 809                 struct wpabuf *wps;
 810                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 811                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 812                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 813                                    "due to mismatch with Requested Device "
 814                                    "Type");
 815                         wpabuf_free(wps);
 816                         return;
 817                 }
 818                 wpabuf_free(wps);
 819         }
 820
 821         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 822                 struct wpabuf *p2p;
 823                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 824                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 825                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 826                                    "due to mismatch with Device ID");
 827                         wpabuf_free(p2p);
 828                         return;
 829                 }
 830                 wpabuf_free(p2p);
 831         }
 832 #endif /* CONFIG_P2P */
 833
 834         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 835             elems.ssid_list_len == 0) {
 836                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 837                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 838                 return;
 839         }
 840
 841 #ifdef CONFIG_P2P
 842         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 843             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 844             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 845                       P2P_WILDCARD_SSID_LEN) == 0) {
 846                 /* Process P2P Wildcard SSID like Wildcard SSID */
 847                 elems.ssid_len = 0;
 848         }
 849 #endif /* CONFIG_P2P */
 850
 851 #ifdef CONFIG_TAXONOMY
 852         {
 853                 struct sta_info *sta;
 854                 struct hostapd_sta_info *info;
 855
 856                 if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) {
 857                         taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len);
 858                 } else if ((info = sta_track_get(hapd->iface,
 859                                                  mgmt->sa)) != NULL) {
 860                         taxonomy_hostapd_sta_info_probe_req(hapd, info,
 861                                                             ie, ie_len);
 862                 }
 863         }
 864 #endif /* CONFIG_TAXONOMY */
 865
 866         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 867                          elems.ssid_list, elems.ssid_list_len);
 868         if (res == NO_SSID_MATCH) {
 869                 if (!(mgmt->da[0] & 0x01)) {
 870                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 871                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 872                                    MAC2STR(mgmt->sa),
 873                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 874                                    MAC2STR(mgmt->da),
 875                                    elems.ssid_list ? " (SSID list)" : "");
 876                 }
 877                 return;
 878         }
 879
 880 #ifdef CONFIG_INTERWORKING
 881         if (hapd->conf->interworking &&
 882             elems.interworking && elems.interworking_len >= 1) {
 883                 u8 ant = elems.interworking[0] & 0x0f;
 884                 if (ant != INTERWORKING_ANT_WILDCARD &&
 885                     ant != hapd->conf->access_network_type) {
 886                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 887                                    " for mismatching ANT %u ignored",
 888                                    MAC2STR(mgmt->sa), ant);
 889                         return;
 890                 }
 891         }
 892
 893         if (hapd->conf->interworking && elems.interworking &&
 894             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 895                 const u8 *hessid;
 896                 if (elems.interworking_len == 7)
 897                         hessid = elems.interworking + 1;
 898                 else
 899                         hessid = elems.interworking + 1 + 2;
 900                 if (!is_broadcast_ether_addr(hessid) &&
 901                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 902                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 903                                    " for mismatching HESSID " MACSTR
 904                                    " ignored",
 905                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 906                         return;
 907                 }
 908         }
 909 #endif /* CONFIG_INTERWORKING */
 910
 911 #ifdef CONFIG_P2P
 912         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 913             supp_rates_11b_only(&elems)) {
 914                 /* Indicates support for 11b rates only */
 915                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 916                            MACSTR " with only 802.11b rates",
 917                            MAC2STR(mgmt->sa));
 918                 return;
 919         }
 920 #endif /* CONFIG_P2P */
 921
 922         /* TODO: verify that supp_rates contains at least one matching rate
 923          * with AP configuration */
 924
 925         if (hapd->conf->no_probe_resp_if_seen_on &&
 926             is_multicast_ether_addr(mgmt->da) &&
 927             is_multicast_ether_addr(mgmt->bssid) &&
 928             sta_track_seen_on(hapd->iface, mgmt->sa,
 929                               hapd->conf->no_probe_resp_if_seen_on)) {
 930                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 931                            " since STA has been seen on %s",
 932                            hapd->conf->iface, MAC2STR(mgmt->sa),
 933                            hapd->conf->no_probe_resp_if_seen_on);
 934                 return;
 935         }
 936
 937         if (hapd->conf->no_probe_resp_if_max_sta &&
 938             is_multicast_ether_addr(mgmt->da) &&
 939             is_multicast_ether_addr(mgmt->bssid) &&
 940             hapd->num_sta >= hapd->conf->max_num_sta &&
 941             !ap_get_sta(hapd, mgmt->sa)) {
 942                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 943                            " since no room for additional STA",
 944                            hapd->conf->iface, MAC2STR(mgmt->sa));
 945                 return;
 946         }
 947
 948 #ifdef CONFIG_TESTING_OPTIONS
 949         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 950             drand48() < hapd->iconf->ignore_probe_probability) {
 951                 wpa_printf(MSG_INFO,
 952                            "TESTING: ignoring probe request from " MACSTR,
 953                            MAC2STR(mgmt->sa));
 954                 return;
 955         }
 956 #endif /* CONFIG_TESTING_OPTIONS */
 957
 958         wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, RX_PROBE_REQUEST "sa=" MACSTR
 959                      " signal=%d", MAC2STR(mgmt->sa), ssi_signal);
 960
 961         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 962                                       &resp_len);
 963         if (resp == NULL)
 964                 return;
 965
 966         /*
 967          * If this is a broadcast probe request, apply no ack policy to avoid
 968          * excessive retries.
 969          */
 970         noack = !!(res == WILDCARD_SSID_MATCH &&
 971                    is_broadcast_ether_addr(mgmt->da));
 972
 973         csa_offs_len = 0;
 974         if (hapd->csa_in_progress) {
 975                 if (hapd->cs_c_off_proberesp)
 976                         csa_offs[csa_offs_len++] =
 977                                 hapd->cs_c_off_proberesp;
 978
 979                 if (hapd->cs_c_off_ecsa_proberesp)
 980                         csa_offs[csa_offs_len++] =
 981                                 hapd->cs_c_off_ecsa_proberesp;
 982         }
 983
 984         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 985                                         csa_offs_len ? csa_offs : NULL,
 986                                         csa_offs_len);
 987
 988         if (ret < 0)
 989                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 990
 991         os_free(resp);
 992
 993         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 994                    "SSID", MAC2STR(mgmt->sa),
 995                    elems.ssid_len == 0 ? "broadcast" : "our");
 996 }
 997
 998
 999 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
1000                                         size_t *resp_len)
1001 {
1002         /* check probe response offloading caps and print warnings */
1003         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
1004                 return NULL;
1005
1006 #ifdef CONFIG_WPS
1007         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
1008             (!(hapd->iface->probe_resp_offloads &
1009                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
1010                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
1011                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
1012                            "Probe Response while not supporting this");
1013 #endif /* CONFIG_WPS */
1014
1015 #ifdef CONFIG_P2P
1016         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
1017             !(hapd->iface->probe_resp_offloads &
1018               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
1019                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
1020                            "Probe Response while not supporting this");
1021 #endif  /* CONFIG_P2P */
1022
1023         if (hapd->conf->interworking &&
1024             !(hapd->iface->probe_resp_offloads &
1025               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
1026                 wpa_printf(MSG_WARNING, "Device is trying to offload "
1027                            "Interworking Probe Response while not supporting "
1028                            "this");
1029
1030         /* Generate a Probe Response template for the non-P2P case */
1031         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
1032 }
1033
1034 #endif /* NEED_AP_MLME */
1035
1036
1037 void sta_track_del(struct hostapd_sta_info *info)
1038 {
1039 #ifdef CONFIG_TAXONOMY
1040         wpabuf_free(info->probe_ie_taxonomy);
1041         info->probe_ie_taxonomy = NULL;
1042 #endif /* CONFIG_TAXONOMY */
1043         os_free(info);
1044 }
1045
1046
1047 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
1048                                struct wpa_driver_ap_params *params)
1049 {
1050         struct ieee80211_mgmt *head = NULL;
1051         u8 *tail = NULL;
1052         size_t head_len = 0, tail_len = 0;
1053         u8 *resp = NULL;
1054         size_t resp_len = 0;
1055 #ifdef NEED_AP_MLME
1056         u16 capab_info;
1057         u8 *pos, *tailpos, *csa_pos;
1058
1059 #define BEACON_HEAD_BUF_SIZE 256
1060 #define BEACON_TAIL_BUF_SIZE 512
1061         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
1062         tail_len = BEACON_TAIL_BUF_SIZE;
1063 #ifdef CONFIG_WPS
1064         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
1065                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
1066 #endif /* CONFIG_WPS */
1067 #ifdef CONFIG_P2P
1068         if (hapd->p2p_beacon_ie)
1069                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
1070 #endif /* CONFIG_P2P */
1071 #ifdef CONFIG_FST
1072         if (hapd->iface->fst_ies)
1073                 tail_len += wpabuf_len(hapd->iface->fst_ies);
1074 #endif /* CONFIG_FST */
1075         if (hapd->conf->vendor_elements)
1076                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
1077
1078 #ifdef CONFIG_IEEE80211AC
1079         if (hapd->conf->vendor_vht) {
1080                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
1081                         2 + sizeof(struct ieee80211_vht_operation);
1082         }
1083 #endif /* CONFIG_IEEE80211AC */
1084
1085 #ifdef CONFIG_IEEE80211AX
1086         if (hapd->iconf->ieee80211ax) {
1087                 tail_len += 3 + sizeof(struct ieee80211_he_capabilities) +
1088                         3 + sizeof(struct ieee80211_he_operation);
1089         }
1090 #endif /* CONFIG_IEEE80211AX */
1091
1092         tail_len += hostapd_mbo_ie_len(hapd);
1093         tail_len += hostapd_eid_owe_trans_len(hapd);
1094
1095         tailpos = tail = os_malloc(tail_len);
1096         if (head == NULL || tail == NULL) {
1097                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
1098                 os_free(head);
1099                 os_free(tail);
1100                 return -1;
1101         }
1102
1103         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1104                                            WLAN_FC_STYPE_BEACON);
1105         head->duration = host_to_le16(0);
1106         os_memset(head->da, 0xff, ETH_ALEN);
1107
1108         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1109         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1110         head->u.beacon.beacon_int =
1111                 host_to_le16(hapd->iconf->beacon_int);
1112
1113         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1114         capab_info = hostapd_own_capab_info(hapd);
1115         head->u.beacon.capab_info = host_to_le16(capab_info);
1116         pos = &head->u.beacon.variable[0];
1117
1118         /* SSID */
1119         *pos++ = WLAN_EID_SSID;
1120         if (hapd->conf->ignore_broadcast_ssid == 2) {
1121                 /* clear the data, but keep the correct length of the SSID */
1122                 *pos++ = hapd->conf->ssid.ssid_len;
1123                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1124                 pos += hapd->conf->ssid.ssid_len;
1125         } else if (hapd->conf->ignore_broadcast_ssid) {
1126                 *pos++ = 0; /* empty SSID */
1127         } else {
1128                 *pos++ = hapd->conf->ssid.ssid_len;
1129                 os_memcpy(pos, hapd->conf->ssid.ssid,
1130                           hapd->conf->ssid.ssid_len);
1131                 pos += hapd->conf->ssid.ssid_len;
1132         }
1133
1134         /* Supported rates */
1135         pos = hostapd_eid_supp_rates(hapd, pos);
1136
1137         /* DS Params */
1138         pos = hostapd_eid_ds_params(hapd, pos);
1139
1140         head_len = pos - (u8 *) head;
1141
1142         tailpos = hostapd_eid_country(hapd, tailpos,
1143                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1144
1145         /* Power Constraint element */
1146         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1147
1148         /* CSA IE */
1149         csa_pos = hostapd_eid_csa(hapd, tailpos);
1150         if (csa_pos != tailpos)
1151                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1152         tailpos = csa_pos;
1153
1154         /* ERP Information element */
1155         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1156
1157         /* Extended supported rates */
1158         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1159
1160         /* RSN, MDIE */
1161         if (hapd->conf->wpa != WPA_PROTO_WPA)
1162                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1163                                           tail + BEACON_TAIL_BUF_SIZE -
1164                                           tailpos);
1165
1166         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1167                                                tail + BEACON_TAIL_BUF_SIZE -
1168                                                tailpos);
1169
1170         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1171                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1172
1173         /* eCSA IE */
1174         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1175         if (csa_pos != tailpos)
1176                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1177         tailpos = csa_pos;
1178
1179         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1180
1181 #ifdef CONFIG_IEEE80211N
1182         /* Secondary Channel Offset element */
1183         /* TODO: The standard doesn't specify a position for this element. */
1184         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1185
1186         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1187         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1188 #endif /* CONFIG_IEEE80211N */
1189
1190         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1191
1192         /*
1193          * TODO: Time Advertisement element should only be included in some
1194          * DTIM Beacon frames.
1195          */
1196         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1197
1198         tailpos = hostapd_eid_interworking(hapd, tailpos);
1199         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1200         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1201
1202 #ifdef CONFIG_FST
1203         if (hapd->iface->fst_ies) {
1204                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1205                           wpabuf_len(hapd->iface->fst_ies));
1206                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1207         }
1208 #endif /* CONFIG_FST */
1209
1210 #ifdef CONFIG_IEEE80211AC
1211         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1212                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1213                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1214                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1215                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1216         }
1217 #endif /* CONFIG_IEEE80211AC */
1218
1219         tailpos = hostapd_eid_fils_indic(hapd, tailpos, 0);
1220
1221 #ifdef CONFIG_IEEE80211AX
1222         if (hapd->iconf->ieee80211ax) {
1223                 tailpos = hostapd_eid_he_capab(hapd, tailpos);
1224                 tailpos = hostapd_eid_he_operation(hapd, tailpos);
1225         }
1226 #endif /* CONFIG_IEEE80211AX */
1227
1228 #ifdef CONFIG_IEEE80211AC
1229         if (hapd->conf->vendor_vht)
1230                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1231 #endif /* CONFIG_IEEE80211AC */
1232
1233         /* WPA */
1234         if (hapd->conf->wpa == WPA_PROTO_WPA)
1235                 tailpos = hostapd_eid_wpa(hapd, tailpos,
1236                                           tail + BEACON_TAIL_BUF_SIZE -
1237                                           tailpos);
1238
1239         /* Wi-Fi Alliance WMM */
1240         tailpos = hostapd_eid_wmm(hapd, tailpos);
1241
1242 #ifdef CONFIG_WPS
1243         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1244                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1245                           wpabuf_len(hapd->wps_beacon_ie));
1246                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1247         }
1248 #endif /* CONFIG_WPS */
1249
1250 #ifdef CONFIG_P2P
1251         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1252                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1253                           wpabuf_len(hapd->p2p_beacon_ie));
1254                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1255         }
1256 #endif /* CONFIG_P2P */
1257 #ifdef CONFIG_P2P_MANAGER
1258         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1259             P2P_MANAGE)
1260                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1261 #endif /* CONFIG_P2P_MANAGER */
1262
1263 #ifdef CONFIG_HS20
1264         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1265         tailpos = hostapd_eid_osen(hapd, tailpos);
1266 #endif /* CONFIG_HS20 */
1267
1268         tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1269         tailpos = hostapd_eid_owe_trans(hapd, tailpos,
1270                                         tail + tail_len - tailpos);
1271
1272         if (hapd->conf->vendor_elements) {
1273                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1274                           wpabuf_len(hapd->conf->vendor_elements));
1275                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1276         }
1277
1278         tail_len = tailpos > tail ? tailpos - tail : 0;
1279
1280         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1281 #endif /* NEED_AP_MLME */
1282
1283         os_memset(params, 0, sizeof(*params));
1284         params->head = (u8 *) head;
1285         params->head_len = head_len;
1286         params->tail = tail;
1287         params->tail_len = tail_len;
1288         params->proberesp = resp;
1289         params->proberesp_len = resp_len;
1290         params->dtim_period = hapd->conf->dtim_period;
1291         params->beacon_int = hapd->iconf->beacon_int;
1292         params->basic_rates = hapd->iface->basic_rates;
1293         params->beacon_rate = hapd->iconf->beacon_rate;
1294         params->rate_type = hapd->iconf->rate_type;
1295         params->ssid = hapd->conf->ssid.ssid;
1296         params->ssid_len = hapd->conf->ssid.ssid_len;
1297         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1298             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1299                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1300                         hapd->conf->rsn_pairwise;
1301         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1302                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1303         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1304                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1305         params->group_cipher = hapd->conf->wpa_group;
1306         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1307         params->auth_algs = hapd->conf->auth_algs;
1308         params->wpa_version = hapd->conf->wpa;
1309         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1310                 (hapd->conf->ieee802_1x &&
1311                  (hapd->conf->default_wep_key_len ||
1312                   hapd->conf->individual_wep_key_len));
1313         switch (hapd->conf->ignore_broadcast_ssid) {
1314         case 0:
1315                 params->hide_ssid = NO_SSID_HIDING;
1316                 break;
1317         case 1:
1318                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1319                 break;
1320         case 2:
1321                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1322                 break;
1323         }
1324         params->isolate = hapd->conf->isolate;
1325         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1326 #ifdef NEED_AP_MLME
1327         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1328                                 ERP_INFO_USE_PROTECTION);
1329         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1330                 hapd->iconf->preamble == SHORT_PREAMBLE;
1331         if (hapd->iface->current_mode &&
1332             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1333                 params->short_slot_time =
1334                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1335         else
1336                 params->short_slot_time = -1;
1337         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1338                 params->ht_opmode = -1;
1339         else
1340                 params->ht_opmode = hapd->iface->ht_op_mode;
1341 #endif /* NEED_AP_MLME */
1342         params->interworking = hapd->conf->interworking;
1343         if (hapd->conf->interworking &&
1344             !is_zero_ether_addr(hapd->conf->hessid))
1345                 params->hessid = hapd->conf->hessid;
1346         params->access_network_type = hapd->conf->access_network_type;
1347         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1348 #ifdef CONFIG_P2P
1349         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1350 #endif /* CONFIG_P2P */
1351 #ifdef CONFIG_HS20
1352         params->disable_dgaf = hapd->conf->disable_dgaf;
1353         if (hapd->conf->osen) {
1354                 params->privacy = 1;
1355                 params->osen = 1;
1356         }
1357 #endif /* CONFIG_HS20 */
1358         params->multicast_to_unicast = hapd->conf->multicast_to_unicast;
1359         params->pbss = hapd->conf->pbss;
1360         return 0;
1361 }
1362
1363
1364 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1365 {
1366         os_free(params->tail);
1367         params->tail = NULL;
1368         os_free(params->head);
1369         params->head = NULL;
1370         os_free(params->proberesp);
1371         params->proberesp = NULL;
1372 }
1373
1374
1375 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1376 {
1377         struct wpa_driver_ap_params params;
1378         struct hostapd_freq_params freq;
1379         struct hostapd_iface *iface = hapd->iface;
1380         struct hostapd_config *iconf = iface->conf;
1381         struct wpabuf *beacon, *proberesp, *assocresp;
1382         int res, ret = -1;
1383
1384         if (hapd->csa_in_progress) {
1385                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1386                 return -1;
1387         }
1388
1389         hapd->beacon_set_done = 1;
1390
1391         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1392                 return -1;
1393
1394         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1395             0)
1396                 goto fail;
1397
1398         params.beacon_ies = beacon;
1399         params.proberesp_ies = proberesp;
1400         params.assocresp_ies = assocresp;
1401         params.reenable = hapd->reenable_beacon;
1402         hapd->reenable_beacon = 0;
1403
1404         if (iface->current_mode &&
1405             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1406                                     iconf->channel, iconf->ieee80211n,
1407                                     iconf->ieee80211ac,
1408                                     iconf->secondary_channel,
1409                                     iconf->vht_oper_chwidth,
1410                                     iconf->vht_oper_centr_freq_seg0_idx,
1411                                     iconf->vht_oper_centr_freq_seg1_idx,
1412                                     iface->current_mode->vht_capab) == 0)
1413                 params.freq = &freq;
1414
1415         res = hostapd_drv_set_ap(hapd, &params);
1416         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1417         if (res)
1418                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1419         else
1420                 ret = 0;
1421 fail:
1422         ieee802_11_free_ap_params(&params);
1423         return ret;
1424 }
1425
1426
1427 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1428 {
1429         size_t i;
1430         int ret = 0;
1431
1432         for (i = 0; i < iface->num_bss; i++) {
1433                 if (iface->bss[i]->started &&
1434                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1435                         ret = -1;
1436         }
1437
1438         return ret;
1439 }
1440
1441
1442 /* only update beacons if started */
1443 int ieee802_11_update_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]->beacon_set_done && iface->bss[i]->started &&
1450                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1451                         ret = -1;
1452         }
1453
1454         return ret;
1455 }
1456
1457 #endif /* CONFIG_NATIVE_WINDOWS */