src/ap/beacon.c

   1 /*
   2  * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
   3  * Copyright (c) 2002-2004, Instant802 Networks, Inc.
   4  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   5  * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
   6  *
   7  * This software may be distributed under the terms of the BSD license.
   8  * See README for more details.
   9  */
  10
  11 #include "utils/includes.h"
  12
  13 #ifndef CONFIG_NATIVE_WINDOWS
  14
  15 #include "utils/common.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "common/ieee802_11_common.h"
  18 #include "common/hw_features_common.h"
  19 #include "wps/wps_defs.h"
  20 #include "p2p/p2p.h"
  21 #include "hostapd.h"
  22 #include "ieee802_11.h"
  23 #include "wpa_auth.h"
  24 #include "wmm.h"
  25 #include "ap_config.h"
  26 #include "sta_info.h"
  27 #include "p2p_hostapd.h"
  28 #include "ap_drv_ops.h"
  29 #include "beacon.h"
  30 #include "hs20.h"
  31 #include "dfs.h"
  32
  33
  34 #ifdef NEED_AP_MLME
  35
  36 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
  37                                          size_t len)
  38 {
  39         size_t i;
  40
  41         for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
  42                 if (hapd->conf->radio_measurements[i])
  43                         break;
  44         }
  45
  46         if (i == RRM_CAPABILITIES_IE_LEN || len < 2 + RRM_CAPABILITIES_IE_LEN)
  47                 return eid;
  48
  49         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  50         *eid++ = RRM_CAPABILITIES_IE_LEN;
  51         os_memcpy(eid, hapd->conf->radio_measurements, RRM_CAPABILITIES_IE_LEN);
  52
  53         return eid + RRM_CAPABILITIES_IE_LEN;
  54 }
  55
  56
  57 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  58 {
  59         if (len < 2 + 5)
  60                 return eid;
  61
  62 #ifdef CONFIG_TESTING_OPTIONS
  63         if (hapd->conf->bss_load_test_set) {
  64                 *eid++ = WLAN_EID_BSS_LOAD;
  65                 *eid++ = 5;
  66                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  67                 eid += 5;
  68                 return eid;
  69         }
  70 #endif /* CONFIG_TESTING_OPTIONS */
  71         if (hapd->conf->bss_load_update_period) {
  72                 *eid++ = WLAN_EID_BSS_LOAD;
  73                 *eid++ = 5;
  74                 WPA_PUT_LE16(eid, hapd->num_sta);
  75                 eid += 2;
  76                 *eid++ = hapd->iface->channel_utilization;
  77                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  78                 eid += 2;
  79         }
  80         return eid;
  81 }
  82
  83
  84 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  85 {
  86         u8 erp = 0;
  87
  88         if (hapd->iface->current_mode == NULL ||
  89             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  90                 return 0;
  91
  92         if (hapd->iface->olbc)
  93                 erp |= ERP_INFO_USE_PROTECTION;
  94         if (hapd->iface->num_sta_non_erp > 0) {
  95                 erp |= ERP_INFO_NON_ERP_PRESENT |
  96                         ERP_INFO_USE_PROTECTION;
  97         }
  98         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  99             hapd->iconf->preamble == LONG_PREAMBLE)
 100                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
 101
 102         return erp;
 103 }
 104
 105
 106 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 107 {
 108         *eid++ = WLAN_EID_DS_PARAMS;
 109         *eid++ = 1;
 110         *eid++ = hapd->iconf->channel;
 111         return eid;
 112 }
 113
 114
 115 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 116 {
 117         if (hapd->iface->current_mode == NULL ||
 118             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 119                 return eid;
 120
 121         /* Set NonERP_present and use_protection bits if there
 122          * are any associated NonERP stations. */
 123         /* TODO: use_protection bit can be set to zero even if
 124          * there are NonERP stations present. This optimization
 125          * might be useful if NonERP stations are "quiet".
 126          * See 802.11g/D6 E-1 for recommended practice.
 127          * In addition, Non ERP present might be set, if AP detects Non ERP
 128          * operation on other APs. */
 129
 130         /* Add ERP Information element */
 131         *eid++ = WLAN_EID_ERP_INFO;
 132         *eid++ = 1;
 133         *eid++ = ieee802_11_erp_info(hapd);
 134
 135         return eid;
 136 }
 137
 138
 139 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 140 {
 141         u8 *pos = eid;
 142         u8 local_pwr_constraint = 0;
 143         int dfs;
 144
 145         if (hapd->iface->current_mode == NULL ||
 146             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 147                 return eid;
 148
 149         /* Let host drivers add this IE if DFS support is offloaded */
 150         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 151                 return eid;
 152
 153         /*
 154          * There is no DFS support and power constraint was not directly
 155          * requested by config option.
 156          */
 157         if (!hapd->iconf->ieee80211h &&
 158             hapd->iconf->local_pwr_constraint == -1)
 159                 return eid;
 160
 161         /* Check if DFS is required by regulatory. */
 162         dfs = hostapd_is_dfs_required(hapd->iface);
 163         if (dfs < 0) {
 164                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 165                            dfs);
 166                 dfs = 0;
 167         }
 168
 169         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 170                 return eid;
 171
 172         /*
 173          * ieee80211h (DFS) is enabled so Power Constraint element shall
 174          * be added when running on DFS channel whenever local_pwr_constraint
 175          * is configured or not. In order to meet regulations when TPC is not
 176          * implemented using a transmit power that is below the legal maximum
 177          * (including any mitigation factor) should help. In this case,
 178          * indicate 3 dB below maximum allowed transmit power.
 179          */
 180         if (hapd->iconf->local_pwr_constraint == -1)
 181                 local_pwr_constraint = 3;
 182
 183         /*
 184          * A STA that is not an AP shall use a transmit power less than or
 185          * equal to the local maximum transmit power level for the channel.
 186          * The local maximum transmit power can be calculated from the formula:
 187          * local max TX pwr = max TX pwr - local pwr constraint
 188          * Where max TX pwr is maximum transmit power level specified for
 189          * channel in Country element and local pwr constraint is specified
 190          * for channel in this Power Constraint element.
 191          */
 192
 193         /* Element ID */
 194         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 195         /* Length */
 196         *pos++ = 1;
 197         /* Local Power Constraint */
 198         if (local_pwr_constraint)
 199                 *pos++ = local_pwr_constraint;
 200         else
 201                 *pos++ = hapd->iconf->local_pwr_constraint;
 202
 203         return pos;
 204 }
 205
 206
 207 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 208                                     struct hostapd_channel_data *start,
 209                                     struct hostapd_channel_data *prev)
 210 {
 211         if (end - pos < 3)
 212                 return pos;
 213
 214         /* first channel number */
 215         *pos++ = start->chan;
 216         /* number of channels */
 217         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 218         /* maximum transmit power level */
 219         *pos++ = start->max_tx_power;
 220
 221         return pos;
 222 }
 223
 224
 225 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 226                                 int max_len)
 227 {
 228         u8 *pos = eid;
 229         u8 *end = eid + max_len;
 230         int i;
 231         struct hostapd_hw_modes *mode;
 232         struct hostapd_channel_data *start, *prev;
 233         int chan_spacing = 1;
 234
 235         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 236             hapd->iface->current_mode == NULL)
 237                 return eid;
 238
 239         *pos++ = WLAN_EID_COUNTRY;
 240         pos++; /* length will be set later */
 241         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 242         pos += 3;
 243
 244         mode = hapd->iface->current_mode;
 245         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 246                 chan_spacing = 4;
 247
 248         start = prev = NULL;
 249         for (i = 0; i < mode->num_channels; i++) {
 250                 struct hostapd_channel_data *chan = &mode->channels[i];
 251                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 252                         continue;
 253                 if (start && prev &&
 254                     prev->chan + chan_spacing == chan->chan &&
 255                     start->max_tx_power == chan->max_tx_power) {
 256                         prev = chan;
 257                         continue; /* can use same entry */
 258                 }
 259
 260                 if (start && prev) {
 261                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 262                                                       start, prev);
 263                         start = NULL;
 264                 }
 265
 266                 /* Start new group */
 267                 start = prev = chan;
 268         }
 269
 270         if (start) {
 271                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 272                                               start, prev);
 273         }
 274
 275         if ((pos - eid) & 1) {
 276                 if (end - pos < 1)
 277                         return eid;
 278                 *pos++ = 0; /* pad for 16-bit alignment */
 279         }
 280
 281         eid[1] = (pos - eid) - 2;
 282
 283         return pos;
 284 }
 285
 286
 287 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 288 {
 289         const u8 *ie;
 290         size_t ielen;
 291
 292         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 293         if (ie == NULL || ielen > len)
 294                 return eid;
 295
 296         os_memcpy(eid, ie, ielen);
 297         return eid + ielen;
 298 }
 299
 300
 301 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 302 {
 303 #ifdef CONFIG_TESTING_OPTIONS
 304         if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
 305                 return eid;
 306 #endif /* CONFIG_TESTING_OPTIONS */
 307
 308         if (!hapd->cs_freq_params.channel)
 309                 return eid;
 310
 311         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 312         *eid++ = 3;
 313         *eid++ = hapd->cs_block_tx;
 314         *eid++ = hapd->cs_freq_params.channel;
 315         *eid++ = hapd->cs_count;
 316
 317         return eid;
 318 }
 319
 320
 321 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 322 {
 323         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 324                 return eid;
 325
 326         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 327         *eid++ = 4;
 328         *eid++ = hapd->cs_block_tx;
 329         *eid++ = hapd->iface->cs_oper_class;
 330         *eid++ = hapd->cs_freq_params.channel;
 331         *eid++ = hapd->cs_count;
 332
 333         return eid;
 334 }
 335
 336
 337 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
 338 {
 339         u8 op_class, channel;
 340
 341         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
 342             !hapd->iface->freq)
 343                 return eid;
 344
 345         if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
 346                                           hapd->iconf->secondary_channel,
 347                                           hapd->iconf->vht_oper_chwidth,
 348                                           &op_class, &channel) ==
 349             NUM_HOSTAPD_MODES)
 350                 return eid;
 351
 352         *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
 353         *eid++ = 2;
 354
 355         /* Current Operating Class */
 356         *eid++ = op_class;
 357
 358         /* TODO: Advertise all the supported operating classes */
 359         *eid++ = 0;
 360
 361         return eid;
 362 }
 363
 364
 365 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 366                                    const struct ieee80211_mgmt *req,
 367                                    int is_p2p, size_t *resp_len)
 368 {
 369         struct ieee80211_mgmt *resp;
 370         u8 *pos, *epos, *csa_pos;
 371         size_t buflen;
 372
 373 #define MAX_PROBERESP_LEN 768
 374         buflen = MAX_PROBERESP_LEN;
 375 #ifdef CONFIG_WPS
 376         if (hapd->wps_probe_resp_ie)
 377                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 378 #endif /* CONFIG_WPS */
 379 #ifdef CONFIG_P2P
 380         if (hapd->p2p_probe_resp_ie)
 381                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 382 #endif /* CONFIG_P2P */
 383 #ifdef CONFIG_FST
 384         if (hapd->iface->fst_ies)
 385                 buflen += wpabuf_len(hapd->iface->fst_ies);
 386 #endif /* CONFIG_FST */
 387         if (hapd->conf->vendor_elements)
 388                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 389         if (hapd->conf->vendor_vht) {
 390                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 391                         2 + sizeof(struct ieee80211_vht_operation);
 392         }
 393
 394         buflen += hostapd_mbo_ie_len(hapd);
 395
 396         resp = os_zalloc(buflen);
 397         if (resp == NULL)
 398                 return NULL;
 399
 400         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 401
 402         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 403                                            WLAN_FC_STYPE_PROBE_RESP);
 404         if (req)
 405                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 406         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 407
 408         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 409         resp->u.probe_resp.beacon_int =
 410                 host_to_le16(hapd->iconf->beacon_int);
 411
 412         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 413         resp->u.probe_resp.capab_info =
 414                 host_to_le16(hostapd_own_capab_info(hapd));
 415
 416         pos = resp->u.probe_resp.variable;
 417         *pos++ = WLAN_EID_SSID;
 418         *pos++ = hapd->conf->ssid.ssid_len;
 419         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 420         pos += hapd->conf->ssid.ssid_len;
 421
 422         /* Supported rates */
 423         pos = hostapd_eid_supp_rates(hapd, pos);
 424
 425         /* DS Params */
 426         pos = hostapd_eid_ds_params(hapd, pos);
 427
 428         pos = hostapd_eid_country(hapd, pos, epos - pos);
 429
 430         /* Power Constraint element */
 431         pos = hostapd_eid_pwr_constraint(hapd, pos);
 432
 433         /* CSA IE */
 434         csa_pos = hostapd_eid_csa(hapd, pos);
 435         if (csa_pos != pos)
 436                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 437         pos = csa_pos;
 438
 439         /* ERP Information element */
 440         pos = hostapd_eid_erp_info(hapd, pos);
 441
 442         /* Extended supported rates */
 443         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 444
 445         /* RSN, MDIE, WPA */
 446         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 447
 448         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 449
 450         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 451
 452         /* eCSA IE */
 453         csa_pos = hostapd_eid_ecsa(hapd, pos);
 454         if (csa_pos != pos)
 455                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 456         pos = csa_pos;
 457
 458         pos = hostapd_eid_supported_op_classes(hapd, pos);
 459
 460 #ifdef CONFIG_IEEE80211N
 461         /* Secondary Channel Offset element */
 462         /* TODO: The standard doesn't specify a position for this element. */
 463         pos = hostapd_eid_secondary_channel(hapd, pos);
 464
 465         pos = hostapd_eid_ht_capabilities(hapd, pos);
 466         pos = hostapd_eid_ht_operation(hapd, pos);
 467 #endif /* CONFIG_IEEE80211N */
 468
 469         pos = hostapd_eid_ext_capab(hapd, pos);
 470
 471         pos = hostapd_eid_time_adv(hapd, pos);
 472         pos = hostapd_eid_time_zone(hapd, pos);
 473
 474         pos = hostapd_eid_interworking(hapd, pos);
 475         pos = hostapd_eid_adv_proto(hapd, pos);
 476         pos = hostapd_eid_roaming_consortium(hapd, pos);
 477
 478 #ifdef CONFIG_FST
 479         if (hapd->iface->fst_ies) {
 480                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 481                           wpabuf_len(hapd->iface->fst_ies));
 482                 pos += wpabuf_len(hapd->iface->fst_ies);
 483         }
 484 #endif /* CONFIG_FST */
 485
 486 #ifdef CONFIG_IEEE80211AC
 487         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 488                 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
 489                 pos = hostapd_eid_vht_operation(hapd, pos);
 490                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 491                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 492         }
 493         if (hapd->conf->vendor_vht)
 494                 pos = hostapd_eid_vendor_vht(hapd, pos);
 495 #endif /* CONFIG_IEEE80211AC */
 496
 497         /* Wi-Fi Alliance WMM */
 498         pos = hostapd_eid_wmm(hapd, pos);
 499
 500 #ifdef CONFIG_WPS
 501         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 502                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 503                           wpabuf_len(hapd->wps_probe_resp_ie));
 504                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 505         }
 506 #endif /* CONFIG_WPS */
 507
 508 #ifdef CONFIG_P2P
 509         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 510             hapd->p2p_probe_resp_ie) {
 511                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 512                           wpabuf_len(hapd->p2p_probe_resp_ie));
 513                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 514         }
 515 #endif /* CONFIG_P2P */
 516 #ifdef CONFIG_P2P_MANAGER
 517         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 518             P2P_MANAGE)
 519                 pos = hostapd_eid_p2p_manage(hapd, pos);
 520 #endif /* CONFIG_P2P_MANAGER */
 521
 522 #ifdef CONFIG_HS20
 523         pos = hostapd_eid_hs20_indication(hapd, pos);
 524         pos = hostapd_eid_osen(hapd, pos);
 525 #endif /* CONFIG_HS20 */
 526
 527         pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 528
 529         if (hapd->conf->vendor_elements) {
 530                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 531                           wpabuf_len(hapd->conf->vendor_elements));
 532                 pos += wpabuf_len(hapd->conf->vendor_elements);
 533         }
 534
 535         *resp_len = pos - (u8 *) resp;
 536         return (u8 *) resp;
 537 }
 538
 539
 540 enum ssid_match_result {
 541         NO_SSID_MATCH,
 542         EXACT_SSID_MATCH,
 543         WILDCARD_SSID_MATCH
 544 };
 545
 546 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 547                                          const u8 *ssid, size_t ssid_len,
 548                                          const u8 *ssid_list,
 549                                          size_t ssid_list_len)
 550 {
 551         const u8 *pos, *end;
 552         int wildcard = 0;
 553
 554         if (ssid_len == 0)
 555                 wildcard = 1;
 556         if (ssid_len == hapd->conf->ssid.ssid_len &&
 557             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 558                 return EXACT_SSID_MATCH;
 559
 560         if (ssid_list == NULL)
 561                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 562
 563         pos = ssid_list;
 564         end = ssid_list + ssid_list_len;
 565         while (end - pos >= 1) {
 566                 if (2 + pos[1] > end - pos)
 567                         break;
 568                 if (pos[1] == 0)
 569                         wildcard = 1;
 570                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 571                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 572                         return EXACT_SSID_MATCH;
 573                 pos += 2 + pos[1];
 574         }
 575
 576         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 577 }
 578
 579
 580 void sta_track_expire(struct hostapd_iface *iface, int force)
 581 {
 582         struct os_reltime now;
 583         struct hostapd_sta_info *info;
 584
 585         if (!iface->num_sta_seen)
 586                 return;
 587
 588         os_get_reltime(&now);
 589         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 590                                      list))) {
 591                 if (!force &&
 592                     !os_reltime_expired(&now, &info->last_seen,
 593                                         iface->conf->track_sta_max_age))
 594                         break;
 595                 force = 0;
 596
 597                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 598                            MACSTR, iface->bss[0]->conf->iface,
 599                            MAC2STR(info->addr));
 600                 dl_list_del(&info->list);
 601                 iface->num_sta_seen--;
 602                 os_free(info);
 603         }
 604 }
 605
 606
 607 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 608                                                const u8 *addr)
 609 {
 610         struct hostapd_sta_info *info;
 611
 612         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 613                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 614                         return info;
 615
 616         return NULL;
 617 }
 618
 619
 620 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 621 {
 622         struct hostapd_sta_info *info;
 623
 624         info = sta_track_get(iface, addr);
 625         if (info) {
 626                 /* Move the most recent entry to the end of the list */
 627                 dl_list_del(&info->list);
 628                 dl_list_add_tail(&iface->sta_seen, &info->list);
 629                 os_get_reltime(&info->last_seen);
 630                 return;
 631         }
 632
 633         /* Add a new entry */
 634         info = os_zalloc(sizeof(*info));
 635         if (info == NULL)
 636                 return;
 637         os_memcpy(info->addr, addr, ETH_ALEN);
 638         os_get_reltime(&info->last_seen);
 639
 640         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 641                 /* Expire oldest entry to make room for a new one */
 642                 sta_track_expire(iface, 1);
 643         }
 644
 645         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 646                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 647         dl_list_add_tail(&iface->sta_seen, &info->list);
 648         iface->num_sta_seen++;
 649 }
 650
 651
 652 struct hostapd_data *
 653 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 654                   const char *ifname)
 655 {
 656         struct hapd_interfaces *interfaces = iface->interfaces;
 657         size_t i, j;
 658
 659         for (i = 0; i < interfaces->count; i++) {
 660                 struct hostapd_data *hapd = NULL;
 661
 662                 iface = interfaces->iface[i];
 663                 for (j = 0; j < iface->num_bss; j++) {
 664                         hapd = iface->bss[j];
 665                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 666                                 break;
 667                         hapd = NULL;
 668                 }
 669
 670                 if (hapd && sta_track_get(iface, addr))
 671                         return hapd;
 672         }
 673
 674         return NULL;
 675 }
 676
 677
 678 void handle_probe_req(struct hostapd_data *hapd,
 679                       const struct ieee80211_mgmt *mgmt, size_t len,
 680                       int ssi_signal)
 681 {
 682         u8 *resp;
 683         struct ieee802_11_elems elems;
 684         const u8 *ie;
 685         size_t ie_len;
 686         size_t i, resp_len;
 687         int noack;
 688         enum ssid_match_result res;
 689         int ret;
 690         u16 csa_offs[2];
 691         size_t csa_offs_len;
 692
 693         if (len < IEEE80211_HDRLEN)
 694                 return;
 695         ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
 696         if (hapd->iconf->track_sta_max_num)
 697                 sta_track_add(hapd->iface, mgmt->sa);
 698         ie_len = len - IEEE80211_HDRLEN;
 699
 700         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 701                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 702                                             mgmt->sa, mgmt->da, mgmt->bssid,
 703                                             ie, ie_len, ssi_signal) > 0)
 704                         return;
 705
 706         if (!hapd->iconf->send_probe_response)
 707                 return;
 708
 709         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 710                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 711                            MAC2STR(mgmt->sa));
 712                 return;
 713         }
 714
 715         if ((!elems.ssid || !elems.supp_rates)) {
 716                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 717                            "without SSID or supported rates element",
 718                            MAC2STR(mgmt->sa));
 719                 return;
 720         }
 721
 722         /*
 723          * No need to reply if the Probe Request frame was sent on an adjacent
 724          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 725          * AP with dot11RadioMeasurementActivated set to true, but strictly
 726          * speaking does not allow such ignoring of Probe Request frames if
 727          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 728          * number of unnecessary Probe Response frames for cases where the STA
 729          * is less likely to see them (Probe Request frame sent on a
 730          * neighboring, but partially overlapping, channel).
 731          */
 732         if (elems.ds_params &&
 733             hapd->iface->current_mode &&
 734             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 735              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 736             hapd->iconf->channel != elems.ds_params[0]) {
 737                 wpa_printf(MSG_DEBUG,
 738                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 739                            hapd->iconf->channel, elems.ds_params[0]);
 740                 return;
 741         }
 742
 743 #ifdef CONFIG_P2P
 744         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 745                 struct wpabuf *wps;
 746                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 747                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 748                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 749                                    "due to mismatch with Requested Device "
 750                                    "Type");
 751                         wpabuf_free(wps);
 752                         return;
 753                 }
 754                 wpabuf_free(wps);
 755         }
 756
 757         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 758                 struct wpabuf *p2p;
 759                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 760                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 761                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 762                                    "due to mismatch with Device ID");
 763                         wpabuf_free(p2p);
 764                         return;
 765                 }
 766                 wpabuf_free(p2p);
 767         }
 768 #endif /* CONFIG_P2P */
 769
 770         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 771             elems.ssid_list_len == 0) {
 772                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 773                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 774                 return;
 775         }
 776
 777 #ifdef CONFIG_P2P
 778         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 779             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 780             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 781                       P2P_WILDCARD_SSID_LEN) == 0) {
 782                 /* Process P2P Wildcard SSID like Wildcard SSID */
 783                 elems.ssid_len = 0;
 784         }
 785 #endif /* CONFIG_P2P */
 786
 787         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 788                          elems.ssid_list, elems.ssid_list_len);
 789         if (res == NO_SSID_MATCH) {
 790                 if (!(mgmt->da[0] & 0x01)) {
 791                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 792                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 793                                    MAC2STR(mgmt->sa),
 794                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 795                                    MAC2STR(mgmt->da),
 796                                    elems.ssid_list ? " (SSID list)" : "");
 797                 }
 798                 return;
 799         }
 800
 801 #ifdef CONFIG_INTERWORKING
 802         if (hapd->conf->interworking &&
 803             elems.interworking && elems.interworking_len >= 1) {
 804                 u8 ant = elems.interworking[0] & 0x0f;
 805                 if (ant != INTERWORKING_ANT_WILDCARD &&
 806                     ant != hapd->conf->access_network_type) {
 807                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 808                                    " for mismatching ANT %u ignored",
 809                                    MAC2STR(mgmt->sa), ant);
 810                         return;
 811                 }
 812         }
 813
 814         if (hapd->conf->interworking && elems.interworking &&
 815             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 816                 const u8 *hessid;
 817                 if (elems.interworking_len == 7)
 818                         hessid = elems.interworking + 1;
 819                 else
 820                         hessid = elems.interworking + 1 + 2;
 821                 if (!is_broadcast_ether_addr(hessid) &&
 822                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 823                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 824                                    " for mismatching HESSID " MACSTR
 825                                    " ignored",
 826                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 827                         return;
 828                 }
 829         }
 830 #endif /* CONFIG_INTERWORKING */
 831
 832 #ifdef CONFIG_P2P
 833         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 834             supp_rates_11b_only(&elems)) {
 835                 /* Indicates support for 11b rates only */
 836                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 837                            MACSTR " with only 802.11b rates",
 838                            MAC2STR(mgmt->sa));
 839                 return;
 840         }
 841 #endif /* CONFIG_P2P */
 842
 843         /* TODO: verify that supp_rates contains at least one matching rate
 844          * with AP configuration */
 845
 846         if (hapd->conf->no_probe_resp_if_seen_on &&
 847             is_multicast_ether_addr(mgmt->da) &&
 848             is_multicast_ether_addr(mgmt->bssid) &&
 849             sta_track_seen_on(hapd->iface, mgmt->sa,
 850                               hapd->conf->no_probe_resp_if_seen_on)) {
 851                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 852                            " since STA has been seen on %s",
 853                            hapd->conf->iface, MAC2STR(mgmt->sa),
 854                            hapd->conf->no_probe_resp_if_seen_on);
 855                 return;
 856         }
 857
 858         if (hapd->conf->no_probe_resp_if_max_sta &&
 859             is_multicast_ether_addr(mgmt->da) &&
 860             is_multicast_ether_addr(mgmt->bssid) &&
 861             hapd->num_sta >= hapd->conf->max_num_sta &&
 862             !ap_get_sta(hapd, mgmt->sa)) {
 863                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 864                            " since no room for additional STA",
 865                            hapd->conf->iface, MAC2STR(mgmt->sa));
 866                 return;
 867         }
 868
 869 #ifdef CONFIG_TESTING_OPTIONS
 870         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 871             drand48() < hapd->iconf->ignore_probe_probability) {
 872                 wpa_printf(MSG_INFO,
 873                            "TESTING: ignoring probe request from " MACSTR,
 874                            MAC2STR(mgmt->sa));
 875                 return;
 876         }
 877 #endif /* CONFIG_TESTING_OPTIONS */
 878
 879         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 880                                       &resp_len);
 881         if (resp == NULL)
 882                 return;
 883
 884         /*
 885          * If this is a broadcast probe request, apply no ack policy to avoid
 886          * excessive retries.
 887          */
 888         noack = !!(res == WILDCARD_SSID_MATCH &&
 889                    is_broadcast_ether_addr(mgmt->da));
 890
 891         csa_offs_len = 0;
 892         if (hapd->csa_in_progress) {
 893                 if (hapd->cs_c_off_proberesp)
 894                         csa_offs[csa_offs_len++] =
 895                                 hapd->cs_c_off_proberesp;
 896
 897                 if (hapd->cs_c_off_ecsa_proberesp)
 898                         csa_offs[csa_offs_len++] =
 899                                 hapd->cs_c_off_ecsa_proberesp;
 900         }
 901
 902         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 903                                         csa_offs_len ? csa_offs : NULL,
 904                                         csa_offs_len);
 905
 906         if (ret < 0)
 907                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 908
 909         os_free(resp);
 910
 911         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 912                    "SSID", MAC2STR(mgmt->sa),
 913                    elems.ssid_len == 0 ? "broadcast" : "our");
 914 }
 915
 916
 917 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 918                                         size_t *resp_len)
 919 {
 920         /* check probe response offloading caps and print warnings */
 921         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 922                 return NULL;
 923
 924 #ifdef CONFIG_WPS
 925         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 926             (!(hapd->iface->probe_resp_offloads &
 927                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 928                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 929                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 930                            "Probe Response while not supporting this");
 931 #endif /* CONFIG_WPS */
 932
 933 #ifdef CONFIG_P2P
 934         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 935             !(hapd->iface->probe_resp_offloads &
 936               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 937                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 938                            "Probe Response while not supporting this");
 939 #endif  /* CONFIG_P2P */
 940
 941         if (hapd->conf->interworking &&
 942             !(hapd->iface->probe_resp_offloads &
 943               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 944                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 945                            "Interworking Probe Response while not supporting "
 946                            "this");
 947
 948         /* Generate a Probe Response template for the non-P2P case */
 949         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 950 }
 951
 952 #endif /* NEED_AP_MLME */
 953
 954
 955 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 956                                struct wpa_driver_ap_params *params)
 957 {
 958         struct ieee80211_mgmt *head = NULL;
 959         u8 *tail = NULL;
 960         size_t head_len = 0, tail_len = 0;
 961         u8 *resp = NULL;
 962         size_t resp_len = 0;
 963 #ifdef NEED_AP_MLME
 964         u16 capab_info;
 965         u8 *pos, *tailpos, *csa_pos;
 966
 967 #define BEACON_HEAD_BUF_SIZE 256
 968 #define BEACON_TAIL_BUF_SIZE 512
 969         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 970         tail_len = BEACON_TAIL_BUF_SIZE;
 971 #ifdef CONFIG_WPS
 972         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 973                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 974 #endif /* CONFIG_WPS */
 975 #ifdef CONFIG_P2P
 976         if (hapd->p2p_beacon_ie)
 977                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 978 #endif /* CONFIG_P2P */
 979 #ifdef CONFIG_FST
 980         if (hapd->iface->fst_ies)
 981                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 982 #endif /* CONFIG_FST */
 983         if (hapd->conf->vendor_elements)
 984                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 985
 986 #ifdef CONFIG_IEEE80211AC
 987         if (hapd->conf->vendor_vht) {
 988                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 989                         2 + sizeof(struct ieee80211_vht_operation);
 990         }
 991 #endif /* CONFIG_IEEE80211AC */
 992
 993         tail_len += hostapd_mbo_ie_len(hapd);
 994
 995         tailpos = tail = os_malloc(tail_len);
 996         if (head == NULL || tail == NULL) {
 997                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 998                 os_free(head);
 999                 os_free(tail);
1000                 return -1;
1001         }
1002
1003         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1004                                            WLAN_FC_STYPE_BEACON);
1005         head->duration = host_to_le16(0);
1006         os_memset(head->da, 0xff, ETH_ALEN);
1007
1008         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1009         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1010         head->u.beacon.beacon_int =
1011                 host_to_le16(hapd->iconf->beacon_int);
1012
1013         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1014         capab_info = hostapd_own_capab_info(hapd);
1015         head->u.beacon.capab_info = host_to_le16(capab_info);
1016         pos = &head->u.beacon.variable[0];
1017
1018         /* SSID */
1019         *pos++ = WLAN_EID_SSID;
1020         if (hapd->conf->ignore_broadcast_ssid == 2) {
1021                 /* clear the data, but keep the correct length of the SSID */
1022                 *pos++ = hapd->conf->ssid.ssid_len;
1023                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1024                 pos += hapd->conf->ssid.ssid_len;
1025         } else if (hapd->conf->ignore_broadcast_ssid) {
1026                 *pos++ = 0; /* empty SSID */
1027         } else {
1028                 *pos++ = hapd->conf->ssid.ssid_len;
1029                 os_memcpy(pos, hapd->conf->ssid.ssid,
1030                           hapd->conf->ssid.ssid_len);
1031                 pos += hapd->conf->ssid.ssid_len;
1032         }
1033
1034         /* Supported rates */
1035         pos = hostapd_eid_supp_rates(hapd, pos);
1036
1037         /* DS Params */
1038         pos = hostapd_eid_ds_params(hapd, pos);
1039
1040         head_len = pos - (u8 *) head;
1041
1042         tailpos = hostapd_eid_country(hapd, tailpos,
1043                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1044
1045         /* Power Constraint element */
1046         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1047
1048         /* CSA IE */
1049         csa_pos = hostapd_eid_csa(hapd, tailpos);
1050         if (csa_pos != tailpos)
1051                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1052         tailpos = csa_pos;
1053
1054         /* ERP Information element */
1055         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1056
1057         /* Extended supported rates */
1058         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1059
1060         /* RSN, MDIE, WPA */
1061         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1062                                   tailpos);
1063
1064         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1065                                                tail + BEACON_TAIL_BUF_SIZE -
1066                                                tailpos);
1067
1068         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1069                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1070
1071         /* eCSA IE */
1072         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1073         if (csa_pos != tailpos)
1074                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1075         tailpos = csa_pos;
1076
1077         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1078
1079 #ifdef CONFIG_IEEE80211N
1080         /* Secondary Channel Offset element */
1081         /* TODO: The standard doesn't specify a position for this element. */
1082         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1083
1084         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1085         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1086 #endif /* CONFIG_IEEE80211N */
1087
1088         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1089
1090         /*
1091          * TODO: Time Advertisement element should only be included in some
1092          * DTIM Beacon frames.
1093          */
1094         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1095
1096         tailpos = hostapd_eid_interworking(hapd, tailpos);
1097         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1098         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1099
1100 #ifdef CONFIG_FST
1101         if (hapd->iface->fst_ies) {
1102                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1103                           wpabuf_len(hapd->iface->fst_ies));
1104                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1105         }
1106 #endif /* CONFIG_FST */
1107
1108 #ifdef CONFIG_IEEE80211AC
1109         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1110                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1111                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1112                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1113                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1114         }
1115         if (hapd->conf->vendor_vht)
1116                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1117 #endif /* CONFIG_IEEE80211AC */
1118
1119         /* Wi-Fi Alliance WMM */
1120         tailpos = hostapd_eid_wmm(hapd, tailpos);
1121
1122 #ifdef CONFIG_WPS
1123         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1124                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1125                           wpabuf_len(hapd->wps_beacon_ie));
1126                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1127         }
1128 #endif /* CONFIG_WPS */
1129
1130 #ifdef CONFIG_P2P
1131         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1132                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1133                           wpabuf_len(hapd->p2p_beacon_ie));
1134                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1135         }
1136 #endif /* CONFIG_P2P */
1137 #ifdef CONFIG_P2P_MANAGER
1138         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1139             P2P_MANAGE)
1140                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1141 #endif /* CONFIG_P2P_MANAGER */
1142
1143 #ifdef CONFIG_HS20
1144         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1145         tailpos = hostapd_eid_osen(hapd, tailpos);
1146 #endif /* CONFIG_HS20 */
1147
1148         tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1149
1150         if (hapd->conf->vendor_elements) {
1151                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1152                           wpabuf_len(hapd->conf->vendor_elements));
1153                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1154         }
1155
1156         tail_len = tailpos > tail ? tailpos - tail : 0;
1157
1158         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1159 #endif /* NEED_AP_MLME */
1160
1161         os_memset(params, 0, sizeof(*params));
1162         params->head = (u8 *) head;
1163         params->head_len = head_len;
1164         params->tail = tail;
1165         params->tail_len = tail_len;
1166         params->proberesp = resp;
1167         params->proberesp_len = resp_len;
1168         params->dtim_period = hapd->conf->dtim_period;
1169         params->beacon_int = hapd->iconf->beacon_int;
1170         params->basic_rates = hapd->iface->basic_rates;
1171         params->ssid = hapd->conf->ssid.ssid;
1172         params->ssid_len = hapd->conf->ssid.ssid_len;
1173         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1174             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1175                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1176                         hapd->conf->rsn_pairwise;
1177         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1178                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1179         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1180                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1181         params->group_cipher = hapd->conf->wpa_group;
1182         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1183         params->auth_algs = hapd->conf->auth_algs;
1184         params->wpa_version = hapd->conf->wpa;
1185         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1186                 (hapd->conf->ieee802_1x &&
1187                  (hapd->conf->default_wep_key_len ||
1188                   hapd->conf->individual_wep_key_len));
1189         switch (hapd->conf->ignore_broadcast_ssid) {
1190         case 0:
1191                 params->hide_ssid = NO_SSID_HIDING;
1192                 break;
1193         case 1:
1194                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1195                 break;
1196         case 2:
1197                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1198                 break;
1199         }
1200         params->isolate = hapd->conf->isolate;
1201         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1202 #ifdef NEED_AP_MLME
1203         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1204                                 ERP_INFO_USE_PROTECTION);
1205         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1206                 hapd->iconf->preamble == SHORT_PREAMBLE;
1207         if (hapd->iface->current_mode &&
1208             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1209                 params->short_slot_time =
1210                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1211         else
1212                 params->short_slot_time = -1;
1213         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1214                 params->ht_opmode = -1;
1215         else
1216                 params->ht_opmode = hapd->iface->ht_op_mode;
1217 #endif /* NEED_AP_MLME */
1218         params->interworking = hapd->conf->interworking;
1219         if (hapd->conf->interworking &&
1220             !is_zero_ether_addr(hapd->conf->hessid))
1221                 params->hessid = hapd->conf->hessid;
1222         params->access_network_type = hapd->conf->access_network_type;
1223         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1224 #ifdef CONFIG_P2P
1225         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1226 #endif /* CONFIG_P2P */
1227 #ifdef CONFIG_HS20
1228         params->disable_dgaf = hapd->conf->disable_dgaf;
1229         if (hapd->conf->osen) {
1230                 params->privacy = 1;
1231                 params->osen = 1;
1232         }
1233 #endif /* CONFIG_HS20 */
1234         params->pbss = hapd->conf->pbss;
1235         return 0;
1236 }
1237
1238
1239 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1240 {
1241         os_free(params->tail);
1242         params->tail = NULL;
1243         os_free(params->head);
1244         params->head = NULL;
1245         os_free(params->proberesp);
1246         params->proberesp = NULL;
1247 }
1248
1249
1250 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1251 {
1252         struct wpa_driver_ap_params params;
1253         struct hostapd_freq_params freq;
1254         struct hostapd_iface *iface = hapd->iface;
1255         struct hostapd_config *iconf = iface->conf;
1256         struct wpabuf *beacon, *proberesp, *assocresp;
1257         int res, ret = -1;
1258
1259         if (hapd->csa_in_progress) {
1260                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1261                 return -1;
1262         }
1263
1264         hapd->beacon_set_done = 1;
1265
1266         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1267                 return -1;
1268
1269         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1270             0)
1271                 goto fail;
1272
1273         params.beacon_ies = beacon;
1274         params.proberesp_ies = proberesp;
1275         params.assocresp_ies = assocresp;
1276         params.reenable = hapd->reenable_beacon;
1277         hapd->reenable_beacon = 0;
1278
1279         if (iface->current_mode &&
1280             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1281                                     iconf->channel, iconf->ieee80211n,
1282                                     iconf->ieee80211ac,
1283                                     iconf->secondary_channel,
1284                                     iconf->vht_oper_chwidth,
1285                                     iconf->vht_oper_centr_freq_seg0_idx,
1286                                     iconf->vht_oper_centr_freq_seg1_idx,
1287                                     iface->current_mode->vht_capab) == 0)
1288                 params.freq = &freq;
1289
1290         res = hostapd_drv_set_ap(hapd, &params);
1291         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1292         if (res)
1293                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1294         else
1295                 ret = 0;
1296 fail:
1297         ieee802_11_free_ap_params(&params);
1298         return ret;
1299 }
1300
1301
1302 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1303 {
1304         size_t i;
1305         int ret = 0;
1306
1307         for (i = 0; i < iface->num_bss; i++) {
1308                 if (iface->bss[i]->started &&
1309                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1310                         ret = -1;
1311         }
1312
1313         return ret;
1314 }
1315
1316
1317 /* only update beacons if started */
1318 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1319 {
1320         size_t i;
1321         int ret = 0;
1322
1323         for (i = 0; i < iface->num_bss; i++) {
1324                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1325                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1326                         ret = -1;
1327         }
1328
1329         return ret;
1330 }
1331
1332 #endif /* CONFIG_NATIVE_WINDOWS */