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         if (!hapd->conf->radio_measurements || len < 2 + 4)
  40                 return eid;
  41
  42         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  43         *eid++ = 5;
  44         *eid++ = (hapd->conf->radio_measurements & BIT(0)) ?
  45                 WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00;
  46         *eid++ = 0x00;
  47         *eid++ = 0x00;
  48         *eid++ = 0x00;
  49         *eid++ = 0x00;
  50         return eid;
  51 }
  52
  53
  54 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  55 {
  56         if (len < 2 + 5)
  57                 return eid;
  58
  59 #ifdef CONFIG_TESTING_OPTIONS
  60         if (hapd->conf->bss_load_test_set) {
  61                 *eid++ = WLAN_EID_BSS_LOAD;
  62                 *eid++ = 5;
  63                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  64                 eid += 5;
  65                 return eid;
  66         }
  67 #endif /* CONFIG_TESTING_OPTIONS */
  68         if (hapd->conf->bss_load_update_period) {
  69                 *eid++ = WLAN_EID_BSS_LOAD;
  70                 *eid++ = 5;
  71                 WPA_PUT_LE16(eid, hapd->num_sta);
  72                 eid += 2;
  73                 *eid++ = hapd->iface->channel_utilization;
  74                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  75                 eid += 2;
  76         }
  77         return eid;
  78 }
  79
  80
  81 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  82 {
  83         u8 erp = 0;
  84
  85         if (hapd->iface->current_mode == NULL ||
  86             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  87                 return 0;
  88
  89         if (hapd->iface->olbc)
  90                 erp |= ERP_INFO_USE_PROTECTION;
  91         if (hapd->iface->num_sta_non_erp > 0) {
  92                 erp |= ERP_INFO_NON_ERP_PRESENT |
  93                         ERP_INFO_USE_PROTECTION;
  94         }
  95         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  96             hapd->iconf->preamble == LONG_PREAMBLE)
  97                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  98
  99         return erp;
 100 }
 101
 102
 103 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 104 {
 105         *eid++ = WLAN_EID_DS_PARAMS;
 106         *eid++ = 1;
 107         *eid++ = hapd->iconf->channel;
 108         return eid;
 109 }
 110
 111
 112 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 113 {
 114         if (hapd->iface->current_mode == NULL ||
 115             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 116                 return eid;
 117
 118         /* Set NonERP_present and use_protection bits if there
 119          * are any associated NonERP stations. */
 120         /* TODO: use_protection bit can be set to zero even if
 121          * there are NonERP stations present. This optimization
 122          * might be useful if NonERP stations are "quiet".
 123          * See 802.11g/D6 E-1 for recommended practice.
 124          * In addition, Non ERP present might be set, if AP detects Non ERP
 125          * operation on other APs. */
 126
 127         /* Add ERP Information element */
 128         *eid++ = WLAN_EID_ERP_INFO;
 129         *eid++ = 1;
 130         *eid++ = ieee802_11_erp_info(hapd);
 131
 132         return eid;
 133 }
 134
 135
 136 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 137 {
 138         u8 *pos = eid;
 139         u8 local_pwr_constraint = 0;
 140         int dfs;
 141
 142         if (hapd->iface->current_mode == NULL ||
 143             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 144                 return eid;
 145
 146         /* Let host drivers add this IE if DFS support is offloaded */
 147         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 148                 return eid;
 149
 150         /*
 151          * There is no DFS support and power constraint was not directly
 152          * requested by config option.
 153          */
 154         if (!hapd->iconf->ieee80211h &&
 155             hapd->iconf->local_pwr_constraint == -1)
 156                 return eid;
 157
 158         /* Check if DFS is required by regulatory. */
 159         dfs = hostapd_is_dfs_required(hapd->iface);
 160         if (dfs < 0) {
 161                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 162                            dfs);
 163                 dfs = 0;
 164         }
 165
 166         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 167                 return eid;
 168
 169         /*
 170          * ieee80211h (DFS) is enabled so Power Constraint element shall
 171          * be added when running on DFS channel whenever local_pwr_constraint
 172          * is configured or not. In order to meet regulations when TPC is not
 173          * implemented using a transmit power that is below the legal maximum
 174          * (including any mitigation factor) should help. In this case,
 175          * indicate 3 dB below maximum allowed transmit power.
 176          */
 177         if (hapd->iconf->local_pwr_constraint == -1)
 178                 local_pwr_constraint = 3;
 179
 180         /*
 181          * A STA that is not an AP shall use a transmit power less than or
 182          * equal to the local maximum transmit power level for the channel.
 183          * The local maximum transmit power can be calculated from the formula:
 184          * local max TX pwr = max TX pwr - local pwr constraint
 185          * Where max TX pwr is maximum transmit power level specified for
 186          * channel in Country element and local pwr constraint is specified
 187          * for channel in this Power Constraint element.
 188          */
 189
 190         /* Element ID */
 191         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 192         /* Length */
 193         *pos++ = 1;
 194         /* Local Power Constraint */
 195         if (local_pwr_constraint)
 196                 *pos++ = local_pwr_constraint;
 197         else
 198                 *pos++ = hapd->iconf->local_pwr_constraint;
 199
 200         return pos;
 201 }
 202
 203
 204 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 205                                     struct hostapd_channel_data *start,
 206                                     struct hostapd_channel_data *prev)
 207 {
 208         if (end - pos < 3)
 209                 return pos;
 210
 211         /* first channel number */
 212         *pos++ = start->chan;
 213         /* number of channels */
 214         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 215         /* maximum transmit power level */
 216         *pos++ = start->max_tx_power;
 217
 218         return pos;
 219 }
 220
 221
 222 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 223                                 int max_len)
 224 {
 225         u8 *pos = eid;
 226         u8 *end = eid + max_len;
 227         int i;
 228         struct hostapd_hw_modes *mode;
 229         struct hostapd_channel_data *start, *prev;
 230         int chan_spacing = 1;
 231
 232         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 233             hapd->iface->current_mode == NULL)
 234                 return eid;
 235
 236         *pos++ = WLAN_EID_COUNTRY;
 237         pos++; /* length will be set later */
 238         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 239         pos += 3;
 240
 241         mode = hapd->iface->current_mode;
 242         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 243                 chan_spacing = 4;
 244
 245         start = prev = NULL;
 246         for (i = 0; i < mode->num_channels; i++) {
 247                 struct hostapd_channel_data *chan = &mode->channels[i];
 248                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 249                         continue;
 250                 if (start && prev &&
 251                     prev->chan + chan_spacing == chan->chan &&
 252                     start->max_tx_power == chan->max_tx_power) {
 253                         prev = chan;
 254                         continue; /* can use same entry */
 255                 }
 256
 257                 if (start && prev) {
 258                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 259                                                       start, prev);
 260                         start = NULL;
 261                 }
 262
 263                 /* Start new group */
 264                 start = prev = chan;
 265         }
 266
 267         if (start) {
 268                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 269                                               start, prev);
 270         }
 271
 272         if ((pos - eid) & 1) {
 273                 if (end - pos < 1)
 274                         return eid;
 275                 *pos++ = 0; /* pad for 16-bit alignment */
 276         }
 277
 278         eid[1] = (pos - eid) - 2;
 279
 280         return pos;
 281 }
 282
 283
 284 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 285 {
 286         const u8 *ie;
 287         size_t ielen;
 288
 289         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 290         if (ie == NULL || ielen > len)
 291                 return eid;
 292
 293         os_memcpy(eid, ie, ielen);
 294         return eid + ielen;
 295 }
 296
 297
 298 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 299 {
 300 #ifdef CONFIG_TESTING_OPTIONS
 301         if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
 302                 return eid;
 303 #endif /* CONFIG_TESTING_OPTIONS */
 304
 305         if (!hapd->cs_freq_params.channel)
 306                 return eid;
 307
 308         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 309         *eid++ = 3;
 310         *eid++ = hapd->cs_block_tx;
 311         *eid++ = hapd->cs_freq_params.channel;
 312         *eid++ = hapd->cs_count;
 313
 314         return eid;
 315 }
 316
 317
 318 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 319 {
 320         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 321                 return eid;
 322
 323         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 324         *eid++ = 4;
 325         *eid++ = hapd->cs_block_tx;
 326         *eid++ = hapd->iface->cs_oper_class;
 327         *eid++ = hapd->cs_freq_params.channel;
 328         *eid++ = hapd->cs_count;
 329
 330         return eid;
 331 }
 332
 333
 334 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
 335 {
 336         u8 op_class, channel;
 337
 338         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
 339             !hapd->iface->freq)
 340                 return eid;
 341
 342         if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
 343                                           hapd->iconf->secondary_channel,
 344                                           hapd->iconf->vht_oper_chwidth,
 345                                           &op_class, &channel) ==
 346             NUM_HOSTAPD_MODES)
 347                 return eid;
 348
 349         *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
 350         *eid++ = 2;
 351
 352         /* Current Operating Class */
 353         *eid++ = op_class;
 354
 355         /* TODO: Advertise all the supported operating classes */
 356         *eid++ = 0;
 357
 358         return eid;
 359 }
 360
 361
 362 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 363                                    const struct ieee80211_mgmt *req,
 364                                    int is_p2p, size_t *resp_len)
 365 {
 366         struct ieee80211_mgmt *resp;
 367         u8 *pos, *epos, *csa_pos;
 368         size_t buflen;
 369
 370 #define MAX_PROBERESP_LEN 768
 371         buflen = MAX_PROBERESP_LEN;
 372 #ifdef CONFIG_WPS
 373         if (hapd->wps_probe_resp_ie)
 374                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 375 #endif /* CONFIG_WPS */
 376 #ifdef CONFIG_P2P
 377         if (hapd->p2p_probe_resp_ie)
 378                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 379 #endif /* CONFIG_P2P */
 380 #ifdef CONFIG_FST
 381         if (hapd->iface->fst_ies)
 382                 buflen += wpabuf_len(hapd->iface->fst_ies);
 383 #endif /* CONFIG_FST */
 384         if (hapd->conf->vendor_elements)
 385                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 386         if (hapd->conf->vendor_vht) {
 387                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 388                         2 + sizeof(struct ieee80211_vht_operation);
 389         }
 390
 391         buflen += hostapd_mbo_ie_len(hapd);
 392
 393         resp = os_zalloc(buflen);
 394         if (resp == NULL)
 395                 return NULL;
 396
 397         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 398
 399         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 400                                            WLAN_FC_STYPE_PROBE_RESP);
 401         if (req)
 402                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 403         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 404
 405         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 406         resp->u.probe_resp.beacon_int =
 407                 host_to_le16(hapd->iconf->beacon_int);
 408
 409         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 410         resp->u.probe_resp.capab_info =
 411                 host_to_le16(hostapd_own_capab_info(hapd));
 412
 413         pos = resp->u.probe_resp.variable;
 414         *pos++ = WLAN_EID_SSID;
 415         *pos++ = hapd->conf->ssid.ssid_len;
 416         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 417         pos += hapd->conf->ssid.ssid_len;
 418
 419         /* Supported rates */
 420         pos = hostapd_eid_supp_rates(hapd, pos);
 421
 422         /* DS Params */
 423         pos = hostapd_eid_ds_params(hapd, pos);
 424
 425         pos = hostapd_eid_country(hapd, pos, epos - pos);
 426
 427         /* Power Constraint element */
 428         pos = hostapd_eid_pwr_constraint(hapd, pos);
 429
 430         /* CSA IE */
 431         csa_pos = hostapd_eid_csa(hapd, pos);
 432         if (csa_pos != pos)
 433                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 434         pos = csa_pos;
 435
 436         /* ERP Information element */
 437         pos = hostapd_eid_erp_info(hapd, pos);
 438
 439         /* Extended supported rates */
 440         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 441
 442         /* RSN, MDIE, WPA */
 443         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 444
 445         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 446
 447         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 448
 449         /* eCSA IE */
 450         csa_pos = hostapd_eid_ecsa(hapd, pos);
 451         if (csa_pos != pos)
 452                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 453         pos = csa_pos;
 454
 455         pos = hostapd_eid_supported_op_classes(hapd, pos);
 456
 457 #ifdef CONFIG_IEEE80211N
 458         /* Secondary Channel Offset element */
 459         /* TODO: The standard doesn't specify a position for this element. */
 460         pos = hostapd_eid_secondary_channel(hapd, pos);
 461
 462         pos = hostapd_eid_ht_capabilities(hapd, pos);
 463         pos = hostapd_eid_ht_operation(hapd, pos);
 464 #endif /* CONFIG_IEEE80211N */
 465
 466         pos = hostapd_eid_ext_capab(hapd, pos);
 467
 468         pos = hostapd_eid_time_adv(hapd, pos);
 469         pos = hostapd_eid_time_zone(hapd, pos);
 470
 471         pos = hostapd_eid_interworking(hapd, pos);
 472         pos = hostapd_eid_adv_proto(hapd, pos);
 473         pos = hostapd_eid_roaming_consortium(hapd, pos);
 474
 475 #ifdef CONFIG_FST
 476         if (hapd->iface->fst_ies) {
 477                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 478                           wpabuf_len(hapd->iface->fst_ies));
 479                 pos += wpabuf_len(hapd->iface->fst_ies);
 480         }
 481 #endif /* CONFIG_FST */
 482
 483 #ifdef CONFIG_IEEE80211AC
 484         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 485                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 486                 pos = hostapd_eid_vht_operation(hapd, pos);
 487                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 488                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 489         }
 490         if (hapd->conf->vendor_vht)
 491                 pos = hostapd_eid_vendor_vht(hapd, pos);
 492 #endif /* CONFIG_IEEE80211AC */
 493
 494         /* Wi-Fi Alliance WMM */
 495         pos = hostapd_eid_wmm(hapd, pos);
 496
 497 #ifdef CONFIG_WPS
 498         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 499                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 500                           wpabuf_len(hapd->wps_probe_resp_ie));
 501                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 502         }
 503 #endif /* CONFIG_WPS */
 504
 505 #ifdef CONFIG_P2P
 506         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 507             hapd->p2p_probe_resp_ie) {
 508                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 509                           wpabuf_len(hapd->p2p_probe_resp_ie));
 510                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 511         }
 512 #endif /* CONFIG_P2P */
 513 #ifdef CONFIG_P2P_MANAGER
 514         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 515             P2P_MANAGE)
 516                 pos = hostapd_eid_p2p_manage(hapd, pos);
 517 #endif /* CONFIG_P2P_MANAGER */
 518
 519 #ifdef CONFIG_HS20
 520         pos = hostapd_eid_hs20_indication(hapd, pos);
 521         pos = hostapd_eid_osen(hapd, pos);
 522 #endif /* CONFIG_HS20 */
 523
 524         pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 525
 526         if (hapd->conf->vendor_elements) {
 527                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 528                           wpabuf_len(hapd->conf->vendor_elements));
 529                 pos += wpabuf_len(hapd->conf->vendor_elements);
 530         }
 531
 532         *resp_len = pos - (u8 *) resp;
 533         return (u8 *) resp;
 534 }
 535
 536
 537 enum ssid_match_result {
 538         NO_SSID_MATCH,
 539         EXACT_SSID_MATCH,
 540         WILDCARD_SSID_MATCH
 541 };
 542
 543 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 544                                          const u8 *ssid, size_t ssid_len,
 545                                          const u8 *ssid_list,
 546                                          size_t ssid_list_len)
 547 {
 548         const u8 *pos, *end;
 549         int wildcard = 0;
 550
 551         if (ssid_len == 0)
 552                 wildcard = 1;
 553         if (ssid_len == hapd->conf->ssid.ssid_len &&
 554             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 555                 return EXACT_SSID_MATCH;
 556
 557         if (ssid_list == NULL)
 558                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 559
 560         pos = ssid_list;
 561         end = ssid_list + ssid_list_len;
 562         while (end - pos >= 1) {
 563                 if (2 + pos[1] > end - pos)
 564                         break;
 565                 if (pos[1] == 0)
 566                         wildcard = 1;
 567                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 568                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 569                         return EXACT_SSID_MATCH;
 570                 pos += 2 + pos[1];
 571         }
 572
 573         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 574 }
 575
 576
 577 void sta_track_expire(struct hostapd_iface *iface, int force)
 578 {
 579         struct os_reltime now;
 580         struct hostapd_sta_info *info;
 581
 582         if (!iface->num_sta_seen)
 583                 return;
 584
 585         os_get_reltime(&now);
 586         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 587                                      list))) {
 588                 if (!force &&
 589                     !os_reltime_expired(&now, &info->last_seen,
 590                                         iface->conf->track_sta_max_age))
 591                         break;
 592                 force = 0;
 593
 594                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 595                            MACSTR, iface->bss[0]->conf->iface,
 596                            MAC2STR(info->addr));
 597                 dl_list_del(&info->list);
 598                 iface->num_sta_seen--;
 599                 os_free(info);
 600         }
 601 }
 602
 603
 604 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 605                                                const u8 *addr)
 606 {
 607         struct hostapd_sta_info *info;
 608
 609         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 610                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 611                         return info;
 612
 613         return NULL;
 614 }
 615
 616
 617 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 618 {
 619         struct hostapd_sta_info *info;
 620
 621         info = sta_track_get(iface, addr);
 622         if (info) {
 623                 /* Move the most recent entry to the end of the list */
 624                 dl_list_del(&info->list);
 625                 dl_list_add_tail(&iface->sta_seen, &info->list);
 626                 os_get_reltime(&info->last_seen);
 627                 return;
 628         }
 629
 630         /* Add a new entry */
 631         info = os_zalloc(sizeof(*info));
 632         os_memcpy(info->addr, addr, ETH_ALEN);
 633         os_get_reltime(&info->last_seen);
 634
 635         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 636                 /* Expire oldest entry to make room for a new one */
 637                 sta_track_expire(iface, 1);
 638         }
 639
 640         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 641                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 642         dl_list_add_tail(&iface->sta_seen, &info->list);
 643         iface->num_sta_seen++;
 644 }
 645
 646
 647 struct hostapd_data *
 648 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 649                   const char *ifname)
 650 {
 651         struct hapd_interfaces *interfaces = iface->interfaces;
 652         size_t i, j;
 653
 654         for (i = 0; i < interfaces->count; i++) {
 655                 struct hostapd_data *hapd = NULL;
 656
 657                 iface = interfaces->iface[i];
 658                 for (j = 0; j < iface->num_bss; j++) {
 659                         hapd = iface->bss[j];
 660                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 661                                 break;
 662                         hapd = NULL;
 663                 }
 664
 665                 if (hapd && sta_track_get(iface, addr))
 666                         return hapd;
 667         }
 668
 669         return NULL;
 670 }
 671
 672
 673 void handle_probe_req(struct hostapd_data *hapd,
 674                       const struct ieee80211_mgmt *mgmt, size_t len,
 675                       int ssi_signal)
 676 {
 677         u8 *resp;
 678         struct ieee802_11_elems elems;
 679         const u8 *ie;
 680         size_t ie_len;
 681         size_t i, resp_len;
 682         int noack;
 683         enum ssid_match_result res;
 684         int ret;
 685         u16 csa_offs[2];
 686         size_t csa_offs_len;
 687
 688         ie = mgmt->u.probe_req.variable;
 689         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 690                 return;
 691         if (hapd->iconf->track_sta_max_num)
 692                 sta_track_add(hapd->iface, mgmt->sa);
 693         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 694
 695         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 696                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 697                                             mgmt->sa, mgmt->da, mgmt->bssid,
 698                                             ie, ie_len, ssi_signal) > 0)
 699                         return;
 700
 701         if (!hapd->iconf->send_probe_response)
 702                 return;
 703
 704         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 705                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 706                            MAC2STR(mgmt->sa));
 707                 return;
 708         }
 709
 710         if ((!elems.ssid || !elems.supp_rates)) {
 711                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 712                            "without SSID or supported rates element",
 713                            MAC2STR(mgmt->sa));
 714                 return;
 715         }
 716
 717         /*
 718          * No need to reply if the Probe Request frame was sent on an adjacent
 719          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 720          * AP with dot11RadioMeasurementActivated set to true, but strictly
 721          * speaking does not allow such ignoring of Probe Request frames if
 722          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 723          * number of unnecessary Probe Response frames for cases where the STA
 724          * is less likely to see them (Probe Request frame sent on a
 725          * neighboring, but partially overlapping, channel).
 726          */
 727         if (elems.ds_params &&
 728             hapd->iface->current_mode &&
 729             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 730              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 731             hapd->iconf->channel != elems.ds_params[0]) {
 732                 wpa_printf(MSG_DEBUG,
 733                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 734                            hapd->iconf->channel, elems.ds_params[0]);
 735                 return;
 736         }
 737
 738 #ifdef CONFIG_P2P
 739         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 740                 struct wpabuf *wps;
 741                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 742                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 743                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 744                                    "due to mismatch with Requested Device "
 745                                    "Type");
 746                         wpabuf_free(wps);
 747                         return;
 748                 }
 749                 wpabuf_free(wps);
 750         }
 751
 752         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 753                 struct wpabuf *p2p;
 754                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 755                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 756                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 757                                    "due to mismatch with Device ID");
 758                         wpabuf_free(p2p);
 759                         return;
 760                 }
 761                 wpabuf_free(p2p);
 762         }
 763 #endif /* CONFIG_P2P */
 764
 765         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 766             elems.ssid_list_len == 0) {
 767                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 768                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 769                 return;
 770         }
 771
 772 #ifdef CONFIG_P2P
 773         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 774             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 775             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 776                       P2P_WILDCARD_SSID_LEN) == 0) {
 777                 /* Process P2P Wildcard SSID like Wildcard SSID */
 778                 elems.ssid_len = 0;
 779         }
 780 #endif /* CONFIG_P2P */
 781
 782         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 783                          elems.ssid_list, elems.ssid_list_len);
 784         if (res == NO_SSID_MATCH) {
 785                 if (!(mgmt->da[0] & 0x01)) {
 786                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 787                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 788                                    MAC2STR(mgmt->sa),
 789                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 790                                    MAC2STR(mgmt->da),
 791                                    elems.ssid_list ? " (SSID list)" : "");
 792                 }
 793                 return;
 794         }
 795
 796 #ifdef CONFIG_INTERWORKING
 797         if (hapd->conf->interworking &&
 798             elems.interworking && elems.interworking_len >= 1) {
 799                 u8 ant = elems.interworking[0] & 0x0f;
 800                 if (ant != INTERWORKING_ANT_WILDCARD &&
 801                     ant != hapd->conf->access_network_type) {
 802                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 803                                    " for mismatching ANT %u ignored",
 804                                    MAC2STR(mgmt->sa), ant);
 805                         return;
 806                 }
 807         }
 808
 809         if (hapd->conf->interworking && elems.interworking &&
 810             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 811                 const u8 *hessid;
 812                 if (elems.interworking_len == 7)
 813                         hessid = elems.interworking + 1;
 814                 else
 815                         hessid = elems.interworking + 1 + 2;
 816                 if (!is_broadcast_ether_addr(hessid) &&
 817                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 818                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 819                                    " for mismatching HESSID " MACSTR
 820                                    " ignored",
 821                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 822                         return;
 823                 }
 824         }
 825 #endif /* CONFIG_INTERWORKING */
 826
 827 #ifdef CONFIG_P2P
 828         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 829             supp_rates_11b_only(&elems)) {
 830                 /* Indicates support for 11b rates only */
 831                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 832                            MACSTR " with only 802.11b rates",
 833                            MAC2STR(mgmt->sa));
 834                 return;
 835         }
 836 #endif /* CONFIG_P2P */
 837
 838         /* TODO: verify that supp_rates contains at least one matching rate
 839          * with AP configuration */
 840
 841         if (hapd->conf->no_probe_resp_if_seen_on &&
 842             is_multicast_ether_addr(mgmt->da) &&
 843             is_multicast_ether_addr(mgmt->bssid) &&
 844             sta_track_seen_on(hapd->iface, mgmt->sa,
 845                               hapd->conf->no_probe_resp_if_seen_on)) {
 846                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 847                            " since STA has been seen on %s",
 848                            hapd->conf->iface, MAC2STR(mgmt->sa),
 849                            hapd->conf->no_probe_resp_if_seen_on);
 850                 return;
 851         }
 852
 853         if (hapd->conf->no_probe_resp_if_max_sta &&
 854             is_multicast_ether_addr(mgmt->da) &&
 855             is_multicast_ether_addr(mgmt->bssid) &&
 856             hapd->num_sta >= hapd->conf->max_num_sta &&
 857             !ap_get_sta(hapd, mgmt->sa)) {
 858                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 859                            " since no room for additional STA",
 860                            hapd->conf->iface, MAC2STR(mgmt->sa));
 861                 return;
 862         }
 863
 864 #ifdef CONFIG_TESTING_OPTIONS
 865         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 866             drand48() < hapd->iconf->ignore_probe_probability) {
 867                 wpa_printf(MSG_INFO,
 868                            "TESTING: ignoring probe request from " MACSTR,
 869                            MAC2STR(mgmt->sa));
 870                 return;
 871         }
 872 #endif /* CONFIG_TESTING_OPTIONS */
 873
 874         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 875                                       &resp_len);
 876         if (resp == NULL)
 877                 return;
 878
 879         /*
 880          * If this is a broadcast probe request, apply no ack policy to avoid
 881          * excessive retries.
 882          */
 883         noack = !!(res == WILDCARD_SSID_MATCH &&
 884                    is_broadcast_ether_addr(mgmt->da));
 885
 886         csa_offs_len = 0;
 887         if (hapd->csa_in_progress) {
 888                 if (hapd->cs_c_off_proberesp)
 889                         csa_offs[csa_offs_len++] =
 890                                 hapd->cs_c_off_proberesp;
 891
 892                 if (hapd->cs_c_off_ecsa_proberesp)
 893                         csa_offs[csa_offs_len++] =
 894                                 hapd->cs_c_off_ecsa_proberesp;
 895         }
 896
 897         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 898                                         csa_offs_len ? csa_offs : NULL,
 899                                         csa_offs_len);
 900
 901         if (ret < 0)
 902                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 903
 904         os_free(resp);
 905
 906         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 907                    "SSID", MAC2STR(mgmt->sa),
 908                    elems.ssid_len == 0 ? "broadcast" : "our");
 909 }
 910
 911
 912 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 913                                         size_t *resp_len)
 914 {
 915         /* check probe response offloading caps and print warnings */
 916         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 917                 return NULL;
 918
 919 #ifdef CONFIG_WPS
 920         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 921             (!(hapd->iface->probe_resp_offloads &
 922                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 923                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 924                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 925                            "Probe Response while not supporting this");
 926 #endif /* CONFIG_WPS */
 927
 928 #ifdef CONFIG_P2P
 929         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 930             !(hapd->iface->probe_resp_offloads &
 931               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 932                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 933                            "Probe Response while not supporting this");
 934 #endif  /* CONFIG_P2P */
 935
 936         if (hapd->conf->interworking &&
 937             !(hapd->iface->probe_resp_offloads &
 938               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 939                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 940                            "Interworking Probe Response while not supporting "
 941                            "this");
 942
 943         /* Generate a Probe Response template for the non-P2P case */
 944         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 945 }
 946
 947 #endif /* NEED_AP_MLME */
 948
 949
 950 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 951                                struct wpa_driver_ap_params *params)
 952 {
 953         struct ieee80211_mgmt *head = NULL;
 954         u8 *tail = NULL;
 955         size_t head_len = 0, tail_len = 0;
 956         u8 *resp = NULL;
 957         size_t resp_len = 0;
 958 #ifdef NEED_AP_MLME
 959         u16 capab_info;
 960         u8 *pos, *tailpos, *csa_pos;
 961
 962 #define BEACON_HEAD_BUF_SIZE 256
 963 #define BEACON_TAIL_BUF_SIZE 512
 964         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 965         tail_len = BEACON_TAIL_BUF_SIZE;
 966 #ifdef CONFIG_WPS
 967         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 968                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 969 #endif /* CONFIG_WPS */
 970 #ifdef CONFIG_P2P
 971         if (hapd->p2p_beacon_ie)
 972                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 973 #endif /* CONFIG_P2P */
 974 #ifdef CONFIG_FST
 975         if (hapd->iface->fst_ies)
 976                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 977 #endif /* CONFIG_FST */
 978         if (hapd->conf->vendor_elements)
 979                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 980
 981 #ifdef CONFIG_IEEE80211AC
 982         if (hapd->conf->vendor_vht) {
 983                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 984                         2 + sizeof(struct ieee80211_vht_operation);
 985         }
 986 #endif /* CONFIG_IEEE80211AC */
 987
 988         tail_len += hostapd_mbo_ie_len(hapd);
 989
 990         tailpos = tail = os_malloc(tail_len);
 991         if (head == NULL || tail == NULL) {
 992                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 993                 os_free(head);
 994                 os_free(tail);
 995                 return -1;
 996         }
 997
 998         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 999                                            WLAN_FC_STYPE_BEACON);
1000         head->duration = host_to_le16(0);
1001         os_memset(head->da, 0xff, ETH_ALEN);
1002
1003         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1004         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1005         head->u.beacon.beacon_int =
1006                 host_to_le16(hapd->iconf->beacon_int);
1007
1008         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1009         capab_info = hostapd_own_capab_info(hapd);
1010         head->u.beacon.capab_info = host_to_le16(capab_info);
1011         pos = &head->u.beacon.variable[0];
1012
1013         /* SSID */
1014         *pos++ = WLAN_EID_SSID;
1015         if (hapd->conf->ignore_broadcast_ssid == 2) {
1016                 /* clear the data, but keep the correct length of the SSID */
1017                 *pos++ = hapd->conf->ssid.ssid_len;
1018                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1019                 pos += hapd->conf->ssid.ssid_len;
1020         } else if (hapd->conf->ignore_broadcast_ssid) {
1021                 *pos++ = 0; /* empty SSID */
1022         } else {
1023                 *pos++ = hapd->conf->ssid.ssid_len;
1024                 os_memcpy(pos, hapd->conf->ssid.ssid,
1025                           hapd->conf->ssid.ssid_len);
1026                 pos += hapd->conf->ssid.ssid_len;
1027         }
1028
1029         /* Supported rates */
1030         pos = hostapd_eid_supp_rates(hapd, pos);
1031
1032         /* DS Params */
1033         pos = hostapd_eid_ds_params(hapd, pos);
1034
1035         head_len = pos - (u8 *) head;
1036
1037         tailpos = hostapd_eid_country(hapd, tailpos,
1038                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1039
1040         /* Power Constraint element */
1041         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1042
1043         /* CSA IE */
1044         csa_pos = hostapd_eid_csa(hapd, tailpos);
1045         if (csa_pos != tailpos)
1046                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1047         tailpos = csa_pos;
1048
1049         /* ERP Information element */
1050         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1051
1052         /* Extended supported rates */
1053         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1054
1055         /* RSN, MDIE, WPA */
1056         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1057                                   tailpos);
1058
1059         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1060                                                tail + BEACON_TAIL_BUF_SIZE -
1061                                                tailpos);
1062
1063         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1064                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1065
1066         /* eCSA IE */
1067         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1068         if (csa_pos != tailpos)
1069                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1070         tailpos = csa_pos;
1071
1072         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1073
1074 #ifdef CONFIG_IEEE80211N
1075         /* Secondary Channel Offset element */
1076         /* TODO: The standard doesn't specify a position for this element. */
1077         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1078
1079         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1080         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1081 #endif /* CONFIG_IEEE80211N */
1082
1083         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1084
1085         /*
1086          * TODO: Time Advertisement element should only be included in some
1087          * DTIM Beacon frames.
1088          */
1089         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1090
1091         tailpos = hostapd_eid_interworking(hapd, tailpos);
1092         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1093         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1094
1095 #ifdef CONFIG_FST
1096         if (hapd->iface->fst_ies) {
1097                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1098                           wpabuf_len(hapd->iface->fst_ies));
1099                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1100         }
1101 #endif /* CONFIG_FST */
1102
1103 #ifdef CONFIG_IEEE80211AC
1104         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1105                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1106                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1107                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1108                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1109         }
1110         if (hapd->conf->vendor_vht)
1111                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1112 #endif /* CONFIG_IEEE80211AC */
1113
1114         /* Wi-Fi Alliance WMM */
1115         tailpos = hostapd_eid_wmm(hapd, tailpos);
1116
1117 #ifdef CONFIG_WPS
1118         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1119                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1120                           wpabuf_len(hapd->wps_beacon_ie));
1121                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1122         }
1123 #endif /* CONFIG_WPS */
1124
1125 #ifdef CONFIG_P2P
1126         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1127                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1128                           wpabuf_len(hapd->p2p_beacon_ie));
1129                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1130         }
1131 #endif /* CONFIG_P2P */
1132 #ifdef CONFIG_P2P_MANAGER
1133         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1134             P2P_MANAGE)
1135                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1136 #endif /* CONFIG_P2P_MANAGER */
1137
1138 #ifdef CONFIG_HS20
1139         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1140         tailpos = hostapd_eid_osen(hapd, tailpos);
1141 #endif /* CONFIG_HS20 */
1142
1143         tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1144
1145         if (hapd->conf->vendor_elements) {
1146                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1147                           wpabuf_len(hapd->conf->vendor_elements));
1148                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1149         }
1150
1151         tail_len = tailpos > tail ? tailpos - tail : 0;
1152
1153         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1154 #endif /* NEED_AP_MLME */
1155
1156         os_memset(params, 0, sizeof(*params));
1157         params->head = (u8 *) head;
1158         params->head_len = head_len;
1159         params->tail = tail;
1160         params->tail_len = tail_len;
1161         params->proberesp = resp;
1162         params->proberesp_len = resp_len;
1163         params->dtim_period = hapd->conf->dtim_period;
1164         params->beacon_int = hapd->iconf->beacon_int;
1165         params->basic_rates = hapd->iface->basic_rates;
1166         params->ssid = hapd->conf->ssid.ssid;
1167         params->ssid_len = hapd->conf->ssid.ssid_len;
1168         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1169             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1170                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1171                         hapd->conf->rsn_pairwise;
1172         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1173                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1174         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1175                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1176         params->group_cipher = hapd->conf->wpa_group;
1177         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1178         params->auth_algs = hapd->conf->auth_algs;
1179         params->wpa_version = hapd->conf->wpa;
1180         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1181                 (hapd->conf->ieee802_1x &&
1182                  (hapd->conf->default_wep_key_len ||
1183                   hapd->conf->individual_wep_key_len));
1184         switch (hapd->conf->ignore_broadcast_ssid) {
1185         case 0:
1186                 params->hide_ssid = NO_SSID_HIDING;
1187                 break;
1188         case 1:
1189                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1190                 break;
1191         case 2:
1192                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1193                 break;
1194         }
1195         params->isolate = hapd->conf->isolate;
1196         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1197 #ifdef NEED_AP_MLME
1198         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1199                                 ERP_INFO_USE_PROTECTION);
1200         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1201                 hapd->iconf->preamble == SHORT_PREAMBLE;
1202         if (hapd->iface->current_mode &&
1203             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1204                 params->short_slot_time =
1205                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1206         else
1207                 params->short_slot_time = -1;
1208         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1209                 params->ht_opmode = -1;
1210         else
1211                 params->ht_opmode = hapd->iface->ht_op_mode;
1212 #endif /* NEED_AP_MLME */
1213         params->interworking = hapd->conf->interworking;
1214         if (hapd->conf->interworking &&
1215             !is_zero_ether_addr(hapd->conf->hessid))
1216                 params->hessid = hapd->conf->hessid;
1217         params->access_network_type = hapd->conf->access_network_type;
1218         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1219 #ifdef CONFIG_P2P
1220         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1221 #endif /* CONFIG_P2P */
1222 #ifdef CONFIG_HS20
1223         params->disable_dgaf = hapd->conf->disable_dgaf;
1224         if (hapd->conf->osen) {
1225                 params->privacy = 1;
1226                 params->osen = 1;
1227         }
1228 #endif /* CONFIG_HS20 */
1229         params->pbss = hapd->conf->pbss;
1230         return 0;
1231 }
1232
1233
1234 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1235 {
1236         os_free(params->tail);
1237         params->tail = NULL;
1238         os_free(params->head);
1239         params->head = NULL;
1240         os_free(params->proberesp);
1241         params->proberesp = NULL;
1242 }
1243
1244
1245 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1246 {
1247         struct wpa_driver_ap_params params;
1248         struct hostapd_freq_params freq;
1249         struct hostapd_iface *iface = hapd->iface;
1250         struct hostapd_config *iconf = iface->conf;
1251         struct wpabuf *beacon, *proberesp, *assocresp;
1252         int res, ret = -1;
1253
1254         if (hapd->csa_in_progress) {
1255                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1256                 return -1;
1257         }
1258
1259         hapd->beacon_set_done = 1;
1260
1261         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1262                 return -1;
1263
1264         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1265             0)
1266                 goto fail;
1267
1268         params.beacon_ies = beacon;
1269         params.proberesp_ies = proberesp;
1270         params.assocresp_ies = assocresp;
1271         params.reenable = hapd->reenable_beacon;
1272         hapd->reenable_beacon = 0;
1273
1274         if (iface->current_mode &&
1275             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1276                                     iconf->channel, iconf->ieee80211n,
1277                                     iconf->ieee80211ac,
1278                                     iconf->secondary_channel,
1279                                     iconf->vht_oper_chwidth,
1280                                     iconf->vht_oper_centr_freq_seg0_idx,
1281                                     iconf->vht_oper_centr_freq_seg1_idx,
1282                                     iface->current_mode->vht_capab) == 0)
1283                 params.freq = &freq;
1284
1285         res = hostapd_drv_set_ap(hapd, &params);
1286         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1287         if (res)
1288                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1289         else
1290                 ret = 0;
1291 fail:
1292         ieee802_11_free_ap_params(&params);
1293         return ret;
1294 }
1295
1296
1297 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1298 {
1299         size_t i;
1300         int ret = 0;
1301
1302         for (i = 0; i < iface->num_bss; i++) {
1303                 if (iface->bss[i]->started &&
1304                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1305                         ret = -1;
1306         }
1307
1308         return ret;
1309 }
1310
1311
1312 /* only update beacons if started */
1313 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1314 {
1315         size_t i;
1316         int ret = 0;
1317
1318         for (i = 0; i < iface->num_bss; i++) {
1319                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1320                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1321                         ret = -1;
1322         }
1323
1324         return ret;
1325 }
1326
1327 #endif /* CONFIG_NATIVE_WINDOWS */