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         if (!hapd->cs_freq_params.channel)
 301                 return eid;
 302
 303         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 304         *eid++ = 3;
 305         *eid++ = hapd->cs_block_tx;
 306         *eid++ = hapd->cs_freq_params.channel;
 307         *eid++ = hapd->cs_count;
 308
 309         return eid;
 310 }
 311
 312
 313 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 314 {
 315         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 316                 return eid;
 317
 318         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 319         *eid++ = 4;
 320         *eid++ = hapd->cs_block_tx;
 321         *eid++ = hapd->iface->cs_oper_class;
 322         *eid++ = hapd->cs_freq_params.channel;
 323         *eid++ = hapd->cs_count;
 324
 325         return eid;
 326 }
 327
 328
 329 static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
 330                                   u8 *start, unsigned int *csa_counter_off,
 331                                   unsigned int *ecsa_counter_off)
 332 {
 333         u8 *curr_pos = pos;
 334         u8 *csa_pos = pos;
 335
 336         if (!csa_counter_off || !ecsa_counter_off)
 337                 return pos;
 338
 339         *csa_counter_off = 0;
 340         *ecsa_counter_off = 0;
 341
 342         curr_pos = hostapd_eid_csa(hapd, curr_pos);
 343
 344         /* save an offset to the csa counter - should be last byte */
 345         if (curr_pos != pos)
 346                 *csa_counter_off = curr_pos - start - 1;
 347
 348         csa_pos = curr_pos;
 349         curr_pos = hostapd_eid_ecsa(hapd, curr_pos);
 350
 351         /* save an offset to the eCSA counter - should be last byte */
 352         if (curr_pos != csa_pos)
 353                 *ecsa_counter_off = curr_pos - start - 1;
 354
 355         /* at least one of ies is added */
 356         if (pos != curr_pos) {
 357 #ifdef CONFIG_IEEE80211N
 358                 curr_pos = hostapd_eid_secondary_channel(hapd, curr_pos);
 359 #endif /* CONFIG_IEEE80211N */
 360 #ifdef CONFIG_IEEE80211AC
 361                 curr_pos = hostapd_eid_wb_chsw_wrapper(hapd, curr_pos);
 362 #endif /* CONFIG_IEEE80211AC */
 363         }
 364         return curr_pos;
 365 }
 366
 367
 368 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 369                                    const struct ieee80211_mgmt *req,
 370                                    int is_p2p, size_t *resp_len)
 371 {
 372         struct ieee80211_mgmt *resp;
 373         u8 *pos, *epos;
 374         size_t buflen;
 375
 376 #define MAX_PROBERESP_LEN 768
 377         buflen = MAX_PROBERESP_LEN;
 378 #ifdef CONFIG_WPS
 379         if (hapd->wps_probe_resp_ie)
 380                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 381 #endif /* CONFIG_WPS */
 382 #ifdef CONFIG_P2P
 383         if (hapd->p2p_probe_resp_ie)
 384                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 385 #endif /* CONFIG_P2P */
 386 #ifdef CONFIG_FST
 387         if (hapd->iface->fst_ies)
 388                 buflen += wpabuf_len(hapd->iface->fst_ies);
 389 #endif /* CONFIG_FST */
 390         if (hapd->conf->vendor_elements)
 391                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 392         if (hapd->conf->vendor_vht) {
 393                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 394                         2 + sizeof(struct ieee80211_vht_operation);
 395         }
 396         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         /* ERP Information element */
 434         pos = hostapd_eid_erp_info(hapd, pos);
 435
 436         /* Extended supported rates */
 437         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 438
 439         /* RSN, MDIE, WPA */
 440         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 441
 442         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 443
 444         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 445
 446 #ifdef CONFIG_IEEE80211N
 447         pos = hostapd_eid_ht_capabilities(hapd, pos);
 448         pos = hostapd_eid_ht_operation(hapd, pos);
 449 #endif /* CONFIG_IEEE80211N */
 450
 451         pos = hostapd_eid_ext_capab(hapd, pos);
 452
 453         pos = hostapd_eid_time_adv(hapd, pos);
 454         pos = hostapd_eid_time_zone(hapd, pos);
 455
 456         pos = hostapd_eid_interworking(hapd, pos);
 457         pos = hostapd_eid_adv_proto(hapd, pos);
 458         pos = hostapd_eid_roaming_consortium(hapd, pos);
 459
 460         pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
 461                                     &hapd->cs_c_off_proberesp,
 462                                     &hapd->cs_c_off_ecsa_proberesp);
 463
 464 #ifdef CONFIG_FST
 465         if (hapd->iface->fst_ies) {
 466                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 467                           wpabuf_len(hapd->iface->fst_ies));
 468                 pos += wpabuf_len(hapd->iface->fst_ies);
 469         }
 470 #endif /* CONFIG_FST */
 471
 472 #ifdef CONFIG_IEEE80211AC
 473         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 474                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 475                 pos = hostapd_eid_vht_operation(hapd, pos);
 476         }
 477         if (hapd->conf->vendor_vht)
 478                 pos = hostapd_eid_vendor_vht(hapd, pos);
 479 #endif /* CONFIG_IEEE80211AC */
 480
 481         /* Wi-Fi Alliance WMM */
 482         pos = hostapd_eid_wmm(hapd, pos);
 483
 484 #ifdef CONFIG_WPS
 485         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 486                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 487                           wpabuf_len(hapd->wps_probe_resp_ie));
 488                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 489         }
 490 #endif /* CONFIG_WPS */
 491
 492 #ifdef CONFIG_P2P
 493         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 494             hapd->p2p_probe_resp_ie) {
 495                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 496                           wpabuf_len(hapd->p2p_probe_resp_ie));
 497                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 498         }
 499 #endif /* CONFIG_P2P */
 500 #ifdef CONFIG_P2P_MANAGER
 501         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 502             P2P_MANAGE)
 503                 pos = hostapd_eid_p2p_manage(hapd, pos);
 504 #endif /* CONFIG_P2P_MANAGER */
 505
 506 #ifdef CONFIG_HS20
 507         pos = hostapd_eid_hs20_indication(hapd, pos);
 508         pos = hostapd_eid_osen(hapd, pos);
 509 #endif /* CONFIG_HS20 */
 510
 511         if (hapd->conf->vendor_elements) {
 512                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 513                           wpabuf_len(hapd->conf->vendor_elements));
 514                 pos += wpabuf_len(hapd->conf->vendor_elements);
 515         }
 516
 517         *resp_len = pos - (u8 *) resp;
 518         return (u8 *) resp;
 519 }
 520
 521
 522 enum ssid_match_result {
 523         NO_SSID_MATCH,
 524         EXACT_SSID_MATCH,
 525         WILDCARD_SSID_MATCH
 526 };
 527
 528 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 529                                          const u8 *ssid, size_t ssid_len,
 530                                          const u8 *ssid_list,
 531                                          size_t ssid_list_len)
 532 {
 533         const u8 *pos, *end;
 534         int wildcard = 0;
 535
 536         if (ssid_len == 0)
 537                 wildcard = 1;
 538         if (ssid_len == hapd->conf->ssid.ssid_len &&
 539             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 540                 return EXACT_SSID_MATCH;
 541
 542         if (ssid_list == NULL)
 543                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 544
 545         pos = ssid_list;
 546         end = ssid_list + ssid_list_len;
 547         while (pos + 1 <= end) {
 548                 if (pos + 2 + pos[1] > end)
 549                         break;
 550                 if (pos[1] == 0)
 551                         wildcard = 1;
 552                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 553                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 554                         return EXACT_SSID_MATCH;
 555                 pos += 2 + pos[1];
 556         }
 557
 558         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 559 }
 560
 561
 562 void sta_track_expire(struct hostapd_iface *iface, int force)
 563 {
 564         struct os_reltime now;
 565         struct hostapd_sta_info *info;
 566
 567         if (!iface->num_sta_seen)
 568                 return;
 569
 570         os_get_reltime(&now);
 571         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 572                                      list))) {
 573                 if (!force &&
 574                     !os_reltime_expired(&now, &info->last_seen,
 575                                         iface->conf->track_sta_max_age))
 576                         break;
 577                 force = 0;
 578
 579                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 580                            MACSTR, iface->bss[0]->conf->iface,
 581                            MAC2STR(info->addr));
 582                 dl_list_del(&info->list);
 583                 iface->num_sta_seen--;
 584                 os_free(info);
 585         }
 586 }
 587
 588
 589 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 590                                                const u8 *addr)
 591 {
 592         struct hostapd_sta_info *info;
 593
 594         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 595                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 596                         return info;
 597
 598         return NULL;
 599 }
 600
 601
 602 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 603 {
 604         struct hostapd_sta_info *info;
 605
 606         info = sta_track_get(iface, addr);
 607         if (info) {
 608                 /* Move the most recent entry to the end of the list */
 609                 dl_list_del(&info->list);
 610                 dl_list_add_tail(&iface->sta_seen, &info->list);
 611                 os_get_reltime(&info->last_seen);
 612                 return;
 613         }
 614
 615         /* Add a new entry */
 616         info = os_zalloc(sizeof(*info));
 617         os_memcpy(info->addr, addr, ETH_ALEN);
 618         os_get_reltime(&info->last_seen);
 619
 620         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 621                 /* Expire oldest entry to make room for a new one */
 622                 sta_track_expire(iface, 1);
 623         }
 624
 625         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 626                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 627         dl_list_add_tail(&iface->sta_seen, &info->list);
 628         iface->num_sta_seen++;
 629 }
 630
 631
 632 struct hostapd_data *
 633 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 634                   const char *ifname)
 635 {
 636         struct hapd_interfaces *interfaces = iface->interfaces;
 637         size_t i, j;
 638
 639         for (i = 0; i < interfaces->count; i++) {
 640                 struct hostapd_data *hapd = NULL;
 641
 642                 iface = interfaces->iface[i];
 643                 for (j = 0; j < iface->num_bss; j++) {
 644                         hapd = iface->bss[j];
 645                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 646                                 break;
 647                         hapd = NULL;
 648                 }
 649
 650                 if (hapd && sta_track_get(iface, addr))
 651                         return hapd;
 652         }
 653
 654         return NULL;
 655 }
 656
 657
 658 void handle_probe_req(struct hostapd_data *hapd,
 659                       const struct ieee80211_mgmt *mgmt, size_t len,
 660                       int ssi_signal)
 661 {
 662         u8 *resp;
 663         struct ieee802_11_elems elems;
 664         const u8 *ie;
 665         size_t ie_len;
 666         size_t i, resp_len;
 667         int noack;
 668         enum ssid_match_result res;
 669
 670         ie = mgmt->u.probe_req.variable;
 671         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 672                 return;
 673         if (hapd->iconf->track_sta_max_num)
 674                 sta_track_add(hapd->iface, mgmt->sa);
 675         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 676
 677         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 678                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 679                                             mgmt->sa, mgmt->da, mgmt->bssid,
 680                                             ie, ie_len, ssi_signal) > 0)
 681                         return;
 682
 683         if (!hapd->iconf->send_probe_response)
 684                 return;
 685
 686         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 687                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 688                            MAC2STR(mgmt->sa));
 689                 return;
 690         }
 691
 692         if ((!elems.ssid || !elems.supp_rates)) {
 693                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 694                            "without SSID or supported rates element",
 695                            MAC2STR(mgmt->sa));
 696                 return;
 697         }
 698
 699         /*
 700          * No need to reply if the Probe Request frame was sent on an adjacent
 701          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 702          * AP with dot11RadioMeasurementActivated set to true, but strictly
 703          * speaking does not allow such ignoring of Probe Request frames if
 704          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 705          * number of unnecessary Probe Response frames for cases where the STA
 706          * is less likely to see them (Probe Request frame sent on a
 707          * neighboring, but partially overlapping, channel).
 708          */
 709         if (elems.ds_params &&
 710             hapd->iface->current_mode &&
 711             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 712              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 713             hapd->iconf->channel != elems.ds_params[0]) {
 714                 wpa_printf(MSG_DEBUG,
 715                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 716                            hapd->iconf->channel, elems.ds_params[0]);
 717                 return;
 718         }
 719
 720 #ifdef CONFIG_P2P
 721         if (hapd->p2p && elems.wps_ie) {
 722                 struct wpabuf *wps;
 723                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 724                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 725                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 726                                    "due to mismatch with Requested Device "
 727                                    "Type");
 728                         wpabuf_free(wps);
 729                         return;
 730                 }
 731                 wpabuf_free(wps);
 732         }
 733
 734         if (hapd->p2p && elems.p2p) {
 735                 struct wpabuf *p2p;
 736                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 737                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 738                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 739                                    "due to mismatch with Device ID");
 740                         wpabuf_free(p2p);
 741                         return;
 742                 }
 743                 wpabuf_free(p2p);
 744         }
 745 #endif /* CONFIG_P2P */
 746
 747         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 748             elems.ssid_list_len == 0) {
 749                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 750                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 751                 return;
 752         }
 753
 754 #ifdef CONFIG_P2P
 755         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 756             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 757             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 758                       P2P_WILDCARD_SSID_LEN) == 0) {
 759                 /* Process P2P Wildcard SSID like Wildcard SSID */
 760                 elems.ssid_len = 0;
 761         }
 762 #endif /* CONFIG_P2P */
 763
 764         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 765                          elems.ssid_list, elems.ssid_list_len);
 766         if (res == NO_SSID_MATCH) {
 767                 if (!(mgmt->da[0] & 0x01)) {
 768                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 769                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 770                                    MAC2STR(mgmt->sa),
 771                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 772                                    MAC2STR(mgmt->da),
 773                                    elems.ssid_list ? " (SSID list)" : "");
 774                 }
 775                 return;
 776         }
 777
 778 #ifdef CONFIG_INTERWORKING
 779         if (hapd->conf->interworking &&
 780             elems.interworking && elems.interworking_len >= 1) {
 781                 u8 ant = elems.interworking[0] & 0x0f;
 782                 if (ant != INTERWORKING_ANT_WILDCARD &&
 783                     ant != hapd->conf->access_network_type) {
 784                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 785                                    " for mismatching ANT %u ignored",
 786                                    MAC2STR(mgmt->sa), ant);
 787                         return;
 788                 }
 789         }
 790
 791         if (hapd->conf->interworking && elems.interworking &&
 792             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 793                 const u8 *hessid;
 794                 if (elems.interworking_len == 7)
 795                         hessid = elems.interworking + 1;
 796                 else
 797                         hessid = elems.interworking + 1 + 2;
 798                 if (!is_broadcast_ether_addr(hessid) &&
 799                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 800                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 801                                    " for mismatching HESSID " MACSTR
 802                                    " ignored",
 803                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 804                         return;
 805                 }
 806         }
 807 #endif /* CONFIG_INTERWORKING */
 808
 809 #ifdef CONFIG_P2P
 810         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 811             supp_rates_11b_only(&elems)) {
 812                 /* Indicates support for 11b rates only */
 813                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 814                            MACSTR " with only 802.11b rates",
 815                            MAC2STR(mgmt->sa));
 816                 return;
 817         }
 818 #endif /* CONFIG_P2P */
 819
 820         /* TODO: verify that supp_rates contains at least one matching rate
 821          * with AP configuration */
 822
 823         if (hapd->conf->no_probe_resp_if_seen_on &&
 824             is_multicast_ether_addr(mgmt->da) &&
 825             is_multicast_ether_addr(mgmt->bssid) &&
 826             sta_track_seen_on(hapd->iface, mgmt->sa,
 827                               hapd->conf->no_probe_resp_if_seen_on)) {
 828                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 829                            " since STA has been seen on %s",
 830                            hapd->conf->iface, MAC2STR(mgmt->sa),
 831                            hapd->conf->no_probe_resp_if_seen_on);
 832                 return;
 833         }
 834
 835 #ifdef CONFIG_TESTING_OPTIONS
 836         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 837             drand48() < hapd->iconf->ignore_probe_probability) {
 838                 wpa_printf(MSG_INFO,
 839                            "TESTING: ignoring probe request from " MACSTR,
 840                            MAC2STR(mgmt->sa));
 841                 return;
 842         }
 843 #endif /* CONFIG_TESTING_OPTIONS */
 844
 845         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 846                                       &resp_len);
 847         if (resp == NULL)
 848                 return;
 849
 850         /*
 851          * If this is a broadcast probe request, apply no ack policy to avoid
 852          * excessive retries.
 853          */
 854         noack = !!(res == WILDCARD_SSID_MATCH &&
 855                    is_broadcast_ether_addr(mgmt->da));
 856
 857         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 858                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 859
 860         os_free(resp);
 861
 862         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 863                    "SSID", MAC2STR(mgmt->sa),
 864                    elems.ssid_len == 0 ? "broadcast" : "our");
 865 }
 866
 867
 868 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 869                                         size_t *resp_len)
 870 {
 871         /* check probe response offloading caps and print warnings */
 872         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 873                 return NULL;
 874
 875 #ifdef CONFIG_WPS
 876         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 877             (!(hapd->iface->probe_resp_offloads &
 878                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 879                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 880                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 881                            "Probe Response while not supporting this");
 882 #endif /* CONFIG_WPS */
 883
 884 #ifdef CONFIG_P2P
 885         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 886             !(hapd->iface->probe_resp_offloads &
 887               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 888                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 889                            "Probe Response while not supporting this");
 890 #endif  /* CONFIG_P2P */
 891
 892         if (hapd->conf->interworking &&
 893             !(hapd->iface->probe_resp_offloads &
 894               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 895                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 896                            "Interworking Probe Response while not supporting "
 897                            "this");
 898
 899         /* Generate a Probe Response template for the non-P2P case */
 900         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 901 }
 902
 903 #endif /* NEED_AP_MLME */
 904
 905
 906 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 907                                struct wpa_driver_ap_params *params)
 908 {
 909         struct ieee80211_mgmt *head = NULL;
 910         u8 *tail = NULL;
 911         size_t head_len = 0, tail_len = 0;
 912         u8 *resp = NULL;
 913         size_t resp_len = 0;
 914 #ifdef NEED_AP_MLME
 915         u16 capab_info;
 916         u8 *pos, *tailpos;
 917
 918 #define BEACON_HEAD_BUF_SIZE 256
 919 #define BEACON_TAIL_BUF_SIZE 512
 920         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 921         tail_len = BEACON_TAIL_BUF_SIZE;
 922 #ifdef CONFIG_WPS
 923         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 924                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 925 #endif /* CONFIG_WPS */
 926 #ifdef CONFIG_P2P
 927         if (hapd->p2p_beacon_ie)
 928                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 929 #endif /* CONFIG_P2P */
 930 #ifdef CONFIG_FST
 931         if (hapd->iface->fst_ies)
 932                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 933 #endif /* CONFIG_FST */
 934         if (hapd->conf->vendor_elements)
 935                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 936
 937 #ifdef CONFIG_IEEE80211AC
 938         if (hapd->conf->vendor_vht) {
 939                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 940                         2 + sizeof(struct ieee80211_vht_operation);
 941         }
 942 #endif /* CONFIG_IEEE80211AC */
 943
 944         tailpos = tail = os_malloc(tail_len);
 945         if (head == NULL || tail == NULL) {
 946                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 947                 os_free(head);
 948                 os_free(tail);
 949                 return -1;
 950         }
 951
 952         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 953                                            WLAN_FC_STYPE_BEACON);
 954         head->duration = host_to_le16(0);
 955         os_memset(head->da, 0xff, ETH_ALEN);
 956
 957         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 958         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 959         head->u.beacon.beacon_int =
 960                 host_to_le16(hapd->iconf->beacon_int);
 961
 962         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 963         capab_info = hostapd_own_capab_info(hapd);
 964         head->u.beacon.capab_info = host_to_le16(capab_info);
 965         pos = &head->u.beacon.variable[0];
 966
 967         /* SSID */
 968         *pos++ = WLAN_EID_SSID;
 969         if (hapd->conf->ignore_broadcast_ssid == 2) {
 970                 /* clear the data, but keep the correct length of the SSID */
 971                 *pos++ = hapd->conf->ssid.ssid_len;
 972                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 973                 pos += hapd->conf->ssid.ssid_len;
 974         } else if (hapd->conf->ignore_broadcast_ssid) {
 975                 *pos++ = 0; /* empty SSID */
 976         } else {
 977                 *pos++ = hapd->conf->ssid.ssid_len;
 978                 os_memcpy(pos, hapd->conf->ssid.ssid,
 979                           hapd->conf->ssid.ssid_len);
 980                 pos += hapd->conf->ssid.ssid_len;
 981         }
 982
 983         /* Supported rates */
 984         pos = hostapd_eid_supp_rates(hapd, pos);
 985
 986         /* DS Params */
 987         pos = hostapd_eid_ds_params(hapd, pos);
 988
 989         head_len = pos - (u8 *) head;
 990
 991         tailpos = hostapd_eid_country(hapd, tailpos,
 992                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 993
 994         /* Power Constraint element */
 995         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
 996
 997         /* ERP Information element */
 998         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 999
1000         /* Extended supported rates */
1001         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1002
1003         /* RSN, MDIE, WPA */
1004         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1005                                   tailpos);
1006
1007         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1008                                                tail + BEACON_TAIL_BUF_SIZE -
1009                                                tailpos);
1010
1011         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1012                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1013
1014 #ifdef CONFIG_IEEE80211N
1015         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1016         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1017 #endif /* CONFIG_IEEE80211N */
1018
1019         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1020
1021         /*
1022          * TODO: Time Advertisement element should only be included in some
1023          * DTIM Beacon frames.
1024          */
1025         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1026
1027         tailpos = hostapd_eid_interworking(hapd, tailpos);
1028         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1029         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1030         tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
1031                                         &hapd->cs_c_off_beacon,
1032                                         &hapd->cs_c_off_ecsa_beacon);
1033
1034 #ifdef CONFIG_FST
1035         if (hapd->iface->fst_ies) {
1036                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1037                           wpabuf_len(hapd->iface->fst_ies));
1038                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1039         }
1040 #endif /* CONFIG_FST */
1041
1042 #ifdef CONFIG_IEEE80211AC
1043         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1044                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1045                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1046         }
1047         if (hapd->conf->vendor_vht)
1048                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1049 #endif /* CONFIG_IEEE80211AC */
1050
1051         /* Wi-Fi Alliance WMM */
1052         tailpos = hostapd_eid_wmm(hapd, tailpos);
1053
1054 #ifdef CONFIG_WPS
1055         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1056                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1057                           wpabuf_len(hapd->wps_beacon_ie));
1058                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1059         }
1060 #endif /* CONFIG_WPS */
1061
1062 #ifdef CONFIG_P2P
1063         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1064                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1065                           wpabuf_len(hapd->p2p_beacon_ie));
1066                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1067         }
1068 #endif /* CONFIG_P2P */
1069 #ifdef CONFIG_P2P_MANAGER
1070         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1071             P2P_MANAGE)
1072                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1073 #endif /* CONFIG_P2P_MANAGER */
1074
1075 #ifdef CONFIG_HS20
1076         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1077         tailpos = hostapd_eid_osen(hapd, tailpos);
1078 #endif /* CONFIG_HS20 */
1079
1080         if (hapd->conf->vendor_elements) {
1081                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1082                           wpabuf_len(hapd->conf->vendor_elements));
1083                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1084         }
1085
1086         tail_len = tailpos > tail ? tailpos - tail : 0;
1087
1088         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1089 #endif /* NEED_AP_MLME */
1090
1091         os_memset(params, 0, sizeof(*params));
1092         params->head = (u8 *) head;
1093         params->head_len = head_len;
1094         params->tail = tail;
1095         params->tail_len = tail_len;
1096         params->proberesp = resp;
1097         params->proberesp_len = resp_len;
1098         params->dtim_period = hapd->conf->dtim_period;
1099         params->beacon_int = hapd->iconf->beacon_int;
1100         params->basic_rates = hapd->iface->basic_rates;
1101         params->ssid = hapd->conf->ssid.ssid;
1102         params->ssid_len = hapd->conf->ssid.ssid_len;
1103         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1104             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1105                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1106                         hapd->conf->rsn_pairwise;
1107         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1108                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1109         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1110                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1111         params->group_cipher = hapd->conf->wpa_group;
1112         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1113         params->auth_algs = hapd->conf->auth_algs;
1114         params->wpa_version = hapd->conf->wpa;
1115         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1116                 (hapd->conf->ieee802_1x &&
1117                  (hapd->conf->default_wep_key_len ||
1118                   hapd->conf->individual_wep_key_len));
1119         switch (hapd->conf->ignore_broadcast_ssid) {
1120         case 0:
1121                 params->hide_ssid = NO_SSID_HIDING;
1122                 break;
1123         case 1:
1124                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1125                 break;
1126         case 2:
1127                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1128                 break;
1129         }
1130         params->isolate = hapd->conf->isolate;
1131         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1132 #ifdef NEED_AP_MLME
1133         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1134                                 ERP_INFO_USE_PROTECTION);
1135         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1136                 hapd->iconf->preamble == SHORT_PREAMBLE;
1137         if (hapd->iface->current_mode &&
1138             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1139                 params->short_slot_time =
1140                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1141         else
1142                 params->short_slot_time = -1;
1143         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1144                 params->ht_opmode = -1;
1145         else
1146                 params->ht_opmode = hapd->iface->ht_op_mode;
1147 #endif /* NEED_AP_MLME */
1148         params->interworking = hapd->conf->interworking;
1149         if (hapd->conf->interworking &&
1150             !is_zero_ether_addr(hapd->conf->hessid))
1151                 params->hessid = hapd->conf->hessid;
1152         params->access_network_type = hapd->conf->access_network_type;
1153         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1154 #ifdef CONFIG_P2P
1155         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1156 #endif /* CONFIG_P2P */
1157 #ifdef CONFIG_HS20
1158         params->disable_dgaf = hapd->conf->disable_dgaf;
1159         if (hapd->conf->osen) {
1160                 params->privacy = 1;
1161                 params->osen = 1;
1162         }
1163 #endif /* CONFIG_HS20 */
1164         return 0;
1165 }
1166
1167
1168 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1169 {
1170         os_free(params->tail);
1171         params->tail = NULL;
1172         os_free(params->head);
1173         params->head = NULL;
1174         os_free(params->proberesp);
1175         params->proberesp = NULL;
1176 }
1177
1178
1179 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1180 {
1181         struct wpa_driver_ap_params params;
1182         struct hostapd_freq_params freq;
1183         struct hostapd_iface *iface = hapd->iface;
1184         struct hostapd_config *iconf = iface->conf;
1185         struct wpabuf *beacon, *proberesp, *assocresp;
1186         int res, ret = -1;
1187
1188         if (hapd->csa_in_progress) {
1189                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1190                 return -1;
1191         }
1192
1193         hapd->beacon_set_done = 1;
1194
1195         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1196                 return -1;
1197
1198         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1199             0)
1200                 goto fail;
1201
1202         params.beacon_ies = beacon;
1203         params.proberesp_ies = proberesp;
1204         params.assocresp_ies = assocresp;
1205         params.reenable = hapd->reenable_beacon;
1206         hapd->reenable_beacon = 0;
1207
1208         if (iface->current_mode &&
1209             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1210                                     iconf->channel, iconf->ieee80211n,
1211                                     iconf->ieee80211ac,
1212                                     iconf->secondary_channel,
1213                                     iconf->vht_oper_chwidth,
1214                                     iconf->vht_oper_centr_freq_seg0_idx,
1215                                     iconf->vht_oper_centr_freq_seg1_idx,
1216                                     iface->current_mode->vht_capab) == 0)
1217                 params.freq = &freq;
1218
1219         res = hostapd_drv_set_ap(hapd, &params);
1220         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1221         if (res)
1222                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1223         else
1224                 ret = 0;
1225 fail:
1226         ieee802_11_free_ap_params(&params);
1227         return ret;
1228 }
1229
1230
1231 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1232 {
1233         size_t i;
1234         int ret = 0;
1235
1236         for (i = 0; i < iface->num_bss; i++) {
1237                 if (iface->bss[i]->started &&
1238                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1239                         ret = -1;
1240         }
1241
1242         return ret;
1243 }
1244
1245
1246 /* only update beacons if started */
1247 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1248 {
1249         size_t i;
1250         int ret = 0;
1251
1252         for (i = 0; i < iface->num_bss; i++) {
1253                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1254                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1255                         ret = -1;
1256         }
1257
1258         return ret;
1259 }
1260
1261 #endif /* CONFIG_NATIVE_WINDOWS */