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_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
 330 {
 331         u8 sec_ch;
 332
 333         if (!hapd->cs_freq_params.sec_channel_offset)
 334                 return eid;
 335
 336         if (hapd->cs_freq_params.sec_channel_offset == -1)
 337                 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
 338         else if (hapd->cs_freq_params.sec_channel_offset == 1)
 339                 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
 340         else
 341                 return eid;
 342
 343         *eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
 344         *eid++ = 1;
 345         *eid++ = sec_ch;
 346
 347         return eid;
 348 }
 349
 350
 351 static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
 352                                   u8 *start, unsigned int *csa_counter_off,
 353                                   unsigned int *ecsa_counter_off)
 354 {
 355         u8 *curr_pos = pos;
 356         u8 *csa_pos = pos;
 357
 358         if (!csa_counter_off || !ecsa_counter_off)
 359                 return pos;
 360
 361         *csa_counter_off = 0;
 362         *ecsa_counter_off = 0;
 363
 364         curr_pos = hostapd_eid_csa(hapd, curr_pos);
 365
 366         /* save an offset to the csa counter - should be last byte */
 367         if (curr_pos != pos)
 368                 *csa_counter_off = curr_pos - start - 1;
 369
 370         csa_pos = curr_pos;
 371         curr_pos = hostapd_eid_ecsa(hapd, curr_pos);
 372
 373         /* save an offset to the eCSA counter - should be last byte */
 374         if (curr_pos != csa_pos)
 375                 *ecsa_counter_off = curr_pos - start - 1;
 376
 377         /* at least one of ies is added */
 378         if (pos != curr_pos) {
 379                 curr_pos = hostapd_eid_secondary_channel(hapd, curr_pos);
 380 #ifdef CONFIG_IEEE80211AC
 381                 curr_pos = hostapd_eid_wb_chsw_wrapper(hapd, curr_pos);
 382 #endif /* CONFIG_IEEE80211AC */
 383         }
 384         return curr_pos;
 385 }
 386
 387
 388 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 389                                    const struct ieee80211_mgmt *req,
 390                                    int is_p2p, size_t *resp_len)
 391 {
 392         struct ieee80211_mgmt *resp;
 393         u8 *pos, *epos;
 394         size_t buflen;
 395
 396 #define MAX_PROBERESP_LEN 768
 397         buflen = MAX_PROBERESP_LEN;
 398 #ifdef CONFIG_WPS
 399         if (hapd->wps_probe_resp_ie)
 400                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 401 #endif /* CONFIG_WPS */
 402 #ifdef CONFIG_P2P
 403         if (hapd->p2p_probe_resp_ie)
 404                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 405 #endif /* CONFIG_P2P */
 406 #ifdef CONFIG_FST
 407         if (hapd->iface->fst_ies)
 408                 buflen += wpabuf_len(hapd->iface->fst_ies);
 409 #endif /* CONFIG_FST */
 410         if (hapd->conf->vendor_elements)
 411                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 412         if (hapd->conf->vendor_vht) {
 413                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 414                         2 + sizeof(struct ieee80211_vht_operation);
 415         }
 416         resp = os_zalloc(buflen);
 417         if (resp == NULL)
 418                 return NULL;
 419
 420         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 421
 422         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 423                                            WLAN_FC_STYPE_PROBE_RESP);
 424         if (req)
 425                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 426         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 427
 428         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 429         resp->u.probe_resp.beacon_int =
 430                 host_to_le16(hapd->iconf->beacon_int);
 431
 432         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 433         resp->u.probe_resp.capab_info =
 434                 host_to_le16(hostapd_own_capab_info(hapd));
 435
 436         pos = resp->u.probe_resp.variable;
 437         *pos++ = WLAN_EID_SSID;
 438         *pos++ = hapd->conf->ssid.ssid_len;
 439         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 440         pos += hapd->conf->ssid.ssid_len;
 441
 442         /* Supported rates */
 443         pos = hostapd_eid_supp_rates(hapd, pos);
 444
 445         /* DS Params */
 446         pos = hostapd_eid_ds_params(hapd, pos);
 447
 448         pos = hostapd_eid_country(hapd, pos, epos - pos);
 449
 450         /* Power Constraint element */
 451         pos = hostapd_eid_pwr_constraint(hapd, pos);
 452
 453         /* ERP Information element */
 454         pos = hostapd_eid_erp_info(hapd, pos);
 455
 456         /* Extended supported rates */
 457         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 458
 459         /* RSN, MDIE, WPA */
 460         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 461
 462         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 463
 464         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 465
 466 #ifdef CONFIG_IEEE80211N
 467         pos = hostapd_eid_ht_capabilities(hapd, pos);
 468         pos = hostapd_eid_ht_operation(hapd, pos);
 469 #endif /* CONFIG_IEEE80211N */
 470
 471         pos = hostapd_eid_ext_capab(hapd, pos);
 472
 473         pos = hostapd_eid_time_adv(hapd, pos);
 474         pos = hostapd_eid_time_zone(hapd, pos);
 475
 476         pos = hostapd_eid_interworking(hapd, pos);
 477         pos = hostapd_eid_adv_proto(hapd, pos);
 478         pos = hostapd_eid_roaming_consortium(hapd, pos);
 479
 480         pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
 481                                     &hapd->cs_c_off_proberesp,
 482                                     &hapd->cs_c_off_ecsa_proberesp);
 483
 484 #ifdef CONFIG_FST
 485         if (hapd->iface->fst_ies) {
 486                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 487                           wpabuf_len(hapd->iface->fst_ies));
 488                 pos += wpabuf_len(hapd->iface->fst_ies);
 489         }
 490 #endif /* CONFIG_FST */
 491
 492 #ifdef CONFIG_IEEE80211AC
 493         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 494                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 495                 pos = hostapd_eid_vht_operation(hapd, pos);
 496         }
 497         if (hapd->conf->vendor_vht)
 498                 pos = hostapd_eid_vendor_vht(hapd, pos);
 499 #endif /* CONFIG_IEEE80211AC */
 500
 501         /* Wi-Fi Alliance WMM */
 502         pos = hostapd_eid_wmm(hapd, pos);
 503
 504 #ifdef CONFIG_WPS
 505         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 506                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 507                           wpabuf_len(hapd->wps_probe_resp_ie));
 508                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 509         }
 510 #endif /* CONFIG_WPS */
 511
 512 #ifdef CONFIG_P2P
 513         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 514             hapd->p2p_probe_resp_ie) {
 515                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 516                           wpabuf_len(hapd->p2p_probe_resp_ie));
 517                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 518         }
 519 #endif /* CONFIG_P2P */
 520 #ifdef CONFIG_P2P_MANAGER
 521         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 522             P2P_MANAGE)
 523                 pos = hostapd_eid_p2p_manage(hapd, pos);
 524 #endif /* CONFIG_P2P_MANAGER */
 525
 526 #ifdef CONFIG_HS20
 527         pos = hostapd_eid_hs20_indication(hapd, pos);
 528         pos = hostapd_eid_osen(hapd, pos);
 529 #endif /* CONFIG_HS20 */
 530
 531         if (hapd->conf->vendor_elements) {
 532                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 533                           wpabuf_len(hapd->conf->vendor_elements));
 534                 pos += wpabuf_len(hapd->conf->vendor_elements);
 535         }
 536
 537         *resp_len = pos - (u8 *) resp;
 538         return (u8 *) resp;
 539 }
 540
 541
 542 enum ssid_match_result {
 543         NO_SSID_MATCH,
 544         EXACT_SSID_MATCH,
 545         WILDCARD_SSID_MATCH
 546 };
 547
 548 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 549                                          const u8 *ssid, size_t ssid_len,
 550                                          const u8 *ssid_list,
 551                                          size_t ssid_list_len)
 552 {
 553         const u8 *pos, *end;
 554         int wildcard = 0;
 555
 556         if (ssid_len == 0)
 557                 wildcard = 1;
 558         if (ssid_len == hapd->conf->ssid.ssid_len &&
 559             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 560                 return EXACT_SSID_MATCH;
 561
 562         if (ssid_list == NULL)
 563                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 564
 565         pos = ssid_list;
 566         end = ssid_list + ssid_list_len;
 567         while (pos + 1 <= end) {
 568                 if (pos + 2 + pos[1] > end)
 569                         break;
 570                 if (pos[1] == 0)
 571                         wildcard = 1;
 572                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 573                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 574                         return EXACT_SSID_MATCH;
 575                 pos += 2 + pos[1];
 576         }
 577
 578         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 579 }
 580
 581
 582 void sta_track_expire(struct hostapd_iface *iface, int force)
 583 {
 584         struct os_reltime now;
 585         struct hostapd_sta_info *info;
 586
 587         if (!iface->num_sta_seen)
 588                 return;
 589
 590         os_get_reltime(&now);
 591         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 592                                      list))) {
 593                 if (!force &&
 594                     !os_reltime_expired(&now, &info->last_seen,
 595                                         iface->conf->track_sta_max_age))
 596                         break;
 597                 force = 0;
 598
 599                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 600                            MACSTR, iface->bss[0]->conf->iface,
 601                            MAC2STR(info->addr));
 602                 dl_list_del(&info->list);
 603                 iface->num_sta_seen--;
 604                 os_free(info);
 605         }
 606 }
 607
 608
 609 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 610                                                const u8 *addr)
 611 {
 612         struct hostapd_sta_info *info;
 613
 614         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 615                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 616                         return info;
 617
 618         return NULL;
 619 }
 620
 621
 622 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 623 {
 624         struct hostapd_sta_info *info;
 625
 626         info = sta_track_get(iface, addr);
 627         if (info) {
 628                 /* Move the most recent entry to the end of the list */
 629                 dl_list_del(&info->list);
 630                 dl_list_add_tail(&iface->sta_seen, &info->list);
 631                 os_get_reltime(&info->last_seen);
 632                 return;
 633         }
 634
 635         /* Add a new entry */
 636         info = os_zalloc(sizeof(*info));
 637         os_memcpy(info->addr, addr, ETH_ALEN);
 638         os_get_reltime(&info->last_seen);
 639
 640         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 641                 /* Expire oldest entry to make room for a new one */
 642                 sta_track_expire(iface, 1);
 643         }
 644
 645         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 646                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 647         dl_list_add_tail(&iface->sta_seen, &info->list);
 648         iface->num_sta_seen++;
 649 }
 650
 651
 652 struct hostapd_data *
 653 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 654                   const char *ifname)
 655 {
 656         struct hapd_interfaces *interfaces = iface->interfaces;
 657         size_t i, j;
 658
 659         for (i = 0; i < interfaces->count; i++) {
 660                 struct hostapd_data *hapd = NULL;
 661
 662                 iface = interfaces->iface[i];
 663                 for (j = 0; j < iface->num_bss; j++) {
 664                         hapd = iface->bss[j];
 665                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 666                                 break;
 667                         hapd = NULL;
 668                 }
 669
 670                 if (hapd && sta_track_get(iface, addr))
 671                         return hapd;
 672         }
 673
 674         return NULL;
 675 }
 676
 677
 678 void handle_probe_req(struct hostapd_data *hapd,
 679                       const struct ieee80211_mgmt *mgmt, size_t len,
 680                       int ssi_signal)
 681 {
 682         u8 *resp;
 683         struct ieee802_11_elems elems;
 684         const u8 *ie;
 685         size_t ie_len;
 686         size_t i, resp_len;
 687         int noack;
 688         enum ssid_match_result res;
 689
 690         ie = mgmt->u.probe_req.variable;
 691         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 692                 return;
 693         if (hapd->iconf->track_sta_max_num)
 694                 sta_track_add(hapd->iface, mgmt->sa);
 695         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 696
 697         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 698                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 699                                             mgmt->sa, mgmt->da, mgmt->bssid,
 700                                             ie, ie_len, ssi_signal) > 0)
 701                         return;
 702
 703         if (!hapd->iconf->send_probe_response)
 704                 return;
 705
 706         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 707                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 708                            MAC2STR(mgmt->sa));
 709                 return;
 710         }
 711
 712         if ((!elems.ssid || !elems.supp_rates)) {
 713                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 714                            "without SSID or supported rates element",
 715                            MAC2STR(mgmt->sa));
 716                 return;
 717         }
 718
 719         /*
 720          * No need to reply if the Probe Request frame was sent on an adjacent
 721          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 722          * AP with dot11RadioMeasurementActivated set to true, but strictly
 723          * speaking does not allow such ignoring of Probe Request frames if
 724          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 725          * number of unnecessary Probe Response frames for cases where the STA
 726          * is less likely to see them (Probe Request frame sent on a
 727          * neighboring, but partially overlapping, channel).
 728          */
 729         if (elems.ds_params &&
 730             hapd->iface->current_mode &&
 731             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 732              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 733             hapd->iconf->channel != elems.ds_params[0]) {
 734                 wpa_printf(MSG_DEBUG,
 735                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 736                            hapd->iconf->channel, elems.ds_params[0]);
 737                 return;
 738         }
 739
 740 #ifdef CONFIG_P2P
 741         if (hapd->p2p && elems.wps_ie) {
 742                 struct wpabuf *wps;
 743                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 744                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 745                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 746                                    "due to mismatch with Requested Device "
 747                                    "Type");
 748                         wpabuf_free(wps);
 749                         return;
 750                 }
 751                 wpabuf_free(wps);
 752         }
 753
 754         if (hapd->p2p && elems.p2p) {
 755                 struct wpabuf *p2p;
 756                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 757                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 758                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 759                                    "due to mismatch with Device ID");
 760                         wpabuf_free(p2p);
 761                         return;
 762                 }
 763                 wpabuf_free(p2p);
 764         }
 765 #endif /* CONFIG_P2P */
 766
 767         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 768             elems.ssid_list_len == 0) {
 769                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 770                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 771                 return;
 772         }
 773
 774 #ifdef CONFIG_P2P
 775         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 776             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 777             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 778                       P2P_WILDCARD_SSID_LEN) == 0) {
 779                 /* Process P2P Wildcard SSID like Wildcard SSID */
 780                 elems.ssid_len = 0;
 781         }
 782 #endif /* CONFIG_P2P */
 783
 784         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 785                          elems.ssid_list, elems.ssid_list_len);
 786         if (res == NO_SSID_MATCH) {
 787                 if (!(mgmt->da[0] & 0x01)) {
 788                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 789                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 790                                    MAC2STR(mgmt->sa),
 791                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 792                                    MAC2STR(mgmt->da),
 793                                    elems.ssid_list ? " (SSID list)" : "");
 794                 }
 795                 return;
 796         }
 797
 798 #ifdef CONFIG_INTERWORKING
 799         if (hapd->conf->interworking &&
 800             elems.interworking && elems.interworking_len >= 1) {
 801                 u8 ant = elems.interworking[0] & 0x0f;
 802                 if (ant != INTERWORKING_ANT_WILDCARD &&
 803                     ant != hapd->conf->access_network_type) {
 804                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 805                                    " for mismatching ANT %u ignored",
 806                                    MAC2STR(mgmt->sa), ant);
 807                         return;
 808                 }
 809         }
 810
 811         if (hapd->conf->interworking && elems.interworking &&
 812             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 813                 const u8 *hessid;
 814                 if (elems.interworking_len == 7)
 815                         hessid = elems.interworking + 1;
 816                 else
 817                         hessid = elems.interworking + 1 + 2;
 818                 if (!is_broadcast_ether_addr(hessid) &&
 819                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 820                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 821                                    " for mismatching HESSID " MACSTR
 822                                    " ignored",
 823                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 824                         return;
 825                 }
 826         }
 827 #endif /* CONFIG_INTERWORKING */
 828
 829 #ifdef CONFIG_P2P
 830         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 831             supp_rates_11b_only(&elems)) {
 832                 /* Indicates support for 11b rates only */
 833                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 834                            MACSTR " with only 802.11b rates",
 835                            MAC2STR(mgmt->sa));
 836                 return;
 837         }
 838 #endif /* CONFIG_P2P */
 839
 840         /* TODO: verify that supp_rates contains at least one matching rate
 841          * with AP configuration */
 842
 843         if (hapd->conf->no_probe_resp_if_seen_on &&
 844             is_multicast_ether_addr(mgmt->da) &&
 845             is_multicast_ether_addr(mgmt->bssid) &&
 846             sta_track_seen_on(hapd->iface, mgmt->sa,
 847                               hapd->conf->no_probe_resp_if_seen_on)) {
 848                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 849                            " since STA has been seen on %s",
 850                            hapd->conf->iface, MAC2STR(mgmt->sa),
 851                            hapd->conf->no_probe_resp_if_seen_on);
 852                 return;
 853         }
 854
 855 #ifdef CONFIG_TESTING_OPTIONS
 856         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 857             drand48() < hapd->iconf->ignore_probe_probability) {
 858                 wpa_printf(MSG_INFO,
 859                            "TESTING: ignoring probe request from " MACSTR,
 860                            MAC2STR(mgmt->sa));
 861                 return;
 862         }
 863 #endif /* CONFIG_TESTING_OPTIONS */
 864
 865         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 866                                       &resp_len);
 867         if (resp == NULL)
 868                 return;
 869
 870         /*
 871          * If this is a broadcast probe request, apply no ack policy to avoid
 872          * excessive retries.
 873          */
 874         noack = !!(res == WILDCARD_SSID_MATCH &&
 875                    is_broadcast_ether_addr(mgmt->da));
 876
 877         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 878                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 879
 880         os_free(resp);
 881
 882         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 883                    "SSID", MAC2STR(mgmt->sa),
 884                    elems.ssid_len == 0 ? "broadcast" : "our");
 885 }
 886
 887
 888 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 889                                         size_t *resp_len)
 890 {
 891         /* check probe response offloading caps and print warnings */
 892         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 893                 return NULL;
 894
 895 #ifdef CONFIG_WPS
 896         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 897             (!(hapd->iface->probe_resp_offloads &
 898                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 899                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 900                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 901                            "Probe Response while not supporting this");
 902 #endif /* CONFIG_WPS */
 903
 904 #ifdef CONFIG_P2P
 905         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 906             !(hapd->iface->probe_resp_offloads &
 907               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 908                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 909                            "Probe Response while not supporting this");
 910 #endif  /* CONFIG_P2P */
 911
 912         if (hapd->conf->interworking &&
 913             !(hapd->iface->probe_resp_offloads &
 914               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 915                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 916                            "Interworking Probe Response while not supporting "
 917                            "this");
 918
 919         /* Generate a Probe Response template for the non-P2P case */
 920         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 921 }
 922
 923 #endif /* NEED_AP_MLME */
 924
 925
 926 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 927                                struct wpa_driver_ap_params *params)
 928 {
 929         struct ieee80211_mgmt *head = NULL;
 930         u8 *tail = NULL;
 931         size_t head_len = 0, tail_len = 0;
 932         u8 *resp = NULL;
 933         size_t resp_len = 0;
 934 #ifdef NEED_AP_MLME
 935         u16 capab_info;
 936         u8 *pos, *tailpos;
 937
 938 #define BEACON_HEAD_BUF_SIZE 256
 939 #define BEACON_TAIL_BUF_SIZE 512
 940         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 941         tail_len = BEACON_TAIL_BUF_SIZE;
 942 #ifdef CONFIG_WPS
 943         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 944                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 945 #endif /* CONFIG_WPS */
 946 #ifdef CONFIG_P2P
 947         if (hapd->p2p_beacon_ie)
 948                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 949 #endif /* CONFIG_P2P */
 950 #ifdef CONFIG_FST
 951         if (hapd->iface->fst_ies)
 952                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 953 #endif /* CONFIG_FST */
 954         if (hapd->conf->vendor_elements)
 955                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 956
 957 #ifdef CONFIG_IEEE80211AC
 958         if (hapd->conf->vendor_vht) {
 959                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 960                         2 + sizeof(struct ieee80211_vht_operation);
 961         }
 962 #endif /* CONFIG_IEEE80211AC */
 963
 964         tailpos = tail = os_malloc(tail_len);
 965         if (head == NULL || tail == NULL) {
 966                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 967                 os_free(head);
 968                 os_free(tail);
 969                 return -1;
 970         }
 971
 972         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 973                                            WLAN_FC_STYPE_BEACON);
 974         head->duration = host_to_le16(0);
 975         os_memset(head->da, 0xff, ETH_ALEN);
 976
 977         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 978         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 979         head->u.beacon.beacon_int =
 980                 host_to_le16(hapd->iconf->beacon_int);
 981
 982         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 983         capab_info = hostapd_own_capab_info(hapd);
 984         head->u.beacon.capab_info = host_to_le16(capab_info);
 985         pos = &head->u.beacon.variable[0];
 986
 987         /* SSID */
 988         *pos++ = WLAN_EID_SSID;
 989         if (hapd->conf->ignore_broadcast_ssid == 2) {
 990                 /* clear the data, but keep the correct length of the SSID */
 991                 *pos++ = hapd->conf->ssid.ssid_len;
 992                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 993                 pos += hapd->conf->ssid.ssid_len;
 994         } else if (hapd->conf->ignore_broadcast_ssid) {
 995                 *pos++ = 0; /* empty SSID */
 996         } else {
 997                 *pos++ = hapd->conf->ssid.ssid_len;
 998                 os_memcpy(pos, hapd->conf->ssid.ssid,
 999                           hapd->conf->ssid.ssid_len);
1000                 pos += hapd->conf->ssid.ssid_len;
1001         }
1002
1003         /* Supported rates */
1004         pos = hostapd_eid_supp_rates(hapd, pos);
1005
1006         /* DS Params */
1007         pos = hostapd_eid_ds_params(hapd, pos);
1008
1009         head_len = pos - (u8 *) head;
1010
1011         tailpos = hostapd_eid_country(hapd, tailpos,
1012                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1013
1014         /* Power Constraint element */
1015         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1016
1017         /* ERP Information element */
1018         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1019
1020         /* Extended supported rates */
1021         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1022
1023         /* RSN, MDIE, WPA */
1024         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1025                                   tailpos);
1026
1027         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1028                                                tail + BEACON_TAIL_BUF_SIZE -
1029                                                tailpos);
1030
1031         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1032                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1033
1034 #ifdef CONFIG_IEEE80211N
1035         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1036         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1037 #endif /* CONFIG_IEEE80211N */
1038
1039         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1040
1041         /*
1042          * TODO: Time Advertisement element should only be included in some
1043          * DTIM Beacon frames.
1044          */
1045         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1046
1047         tailpos = hostapd_eid_interworking(hapd, tailpos);
1048         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1049         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1050         tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
1051                                         &hapd->cs_c_off_beacon,
1052                                         &hapd->cs_c_off_ecsa_beacon);
1053
1054 #ifdef CONFIG_FST
1055         if (hapd->iface->fst_ies) {
1056                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1057                           wpabuf_len(hapd->iface->fst_ies));
1058                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1059         }
1060 #endif /* CONFIG_FST */
1061
1062 #ifdef CONFIG_IEEE80211AC
1063         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1064                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1065                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1066         }
1067         if (hapd->conf->vendor_vht)
1068                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1069 #endif /* CONFIG_IEEE80211AC */
1070
1071         /* Wi-Fi Alliance WMM */
1072         tailpos = hostapd_eid_wmm(hapd, tailpos);
1073
1074 #ifdef CONFIG_WPS
1075         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1076                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1077                           wpabuf_len(hapd->wps_beacon_ie));
1078                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1079         }
1080 #endif /* CONFIG_WPS */
1081
1082 #ifdef CONFIG_P2P
1083         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1084                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1085                           wpabuf_len(hapd->p2p_beacon_ie));
1086                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1087         }
1088 #endif /* CONFIG_P2P */
1089 #ifdef CONFIG_P2P_MANAGER
1090         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1091             P2P_MANAGE)
1092                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1093 #endif /* CONFIG_P2P_MANAGER */
1094
1095 #ifdef CONFIG_HS20
1096         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1097         tailpos = hostapd_eid_osen(hapd, tailpos);
1098 #endif /* CONFIG_HS20 */
1099
1100         if (hapd->conf->vendor_elements) {
1101                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1102                           wpabuf_len(hapd->conf->vendor_elements));
1103                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1104         }
1105
1106         tail_len = tailpos > tail ? tailpos - tail : 0;
1107
1108         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1109 #endif /* NEED_AP_MLME */
1110
1111         os_memset(params, 0, sizeof(*params));
1112         params->head = (u8 *) head;
1113         params->head_len = head_len;
1114         params->tail = tail;
1115         params->tail_len = tail_len;
1116         params->proberesp = resp;
1117         params->proberesp_len = resp_len;
1118         params->dtim_period = hapd->conf->dtim_period;
1119         params->beacon_int = hapd->iconf->beacon_int;
1120         params->basic_rates = hapd->iface->basic_rates;
1121         params->ssid = hapd->conf->ssid.ssid;
1122         params->ssid_len = hapd->conf->ssid.ssid_len;
1123         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1124             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1125                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1126                         hapd->conf->rsn_pairwise;
1127         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1128                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1129         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1130                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1131         params->group_cipher = hapd->conf->wpa_group;
1132         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1133         params->auth_algs = hapd->conf->auth_algs;
1134         params->wpa_version = hapd->conf->wpa;
1135         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1136                 (hapd->conf->ieee802_1x &&
1137                  (hapd->conf->default_wep_key_len ||
1138                   hapd->conf->individual_wep_key_len));
1139         switch (hapd->conf->ignore_broadcast_ssid) {
1140         case 0:
1141                 params->hide_ssid = NO_SSID_HIDING;
1142                 break;
1143         case 1:
1144                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1145                 break;
1146         case 2:
1147                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1148                 break;
1149         }
1150         params->isolate = hapd->conf->isolate;
1151         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1152 #ifdef NEED_AP_MLME
1153         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1154                                 ERP_INFO_USE_PROTECTION);
1155         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1156                 hapd->iconf->preamble == SHORT_PREAMBLE;
1157         if (hapd->iface->current_mode &&
1158             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1159                 params->short_slot_time =
1160                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1161         else
1162                 params->short_slot_time = -1;
1163         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1164                 params->ht_opmode = -1;
1165         else
1166                 params->ht_opmode = hapd->iface->ht_op_mode;
1167 #endif /* NEED_AP_MLME */
1168         params->interworking = hapd->conf->interworking;
1169         if (hapd->conf->interworking &&
1170             !is_zero_ether_addr(hapd->conf->hessid))
1171                 params->hessid = hapd->conf->hessid;
1172         params->access_network_type = hapd->conf->access_network_type;
1173         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1174 #ifdef CONFIG_P2P
1175         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1176 #endif /* CONFIG_P2P */
1177 #ifdef CONFIG_HS20
1178         params->disable_dgaf = hapd->conf->disable_dgaf;
1179         if (hapd->conf->osen) {
1180                 params->privacy = 1;
1181                 params->osen = 1;
1182         }
1183 #endif /* CONFIG_HS20 */
1184         return 0;
1185 }
1186
1187
1188 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1189 {
1190         os_free(params->tail);
1191         params->tail = NULL;
1192         os_free(params->head);
1193         params->head = NULL;
1194         os_free(params->proberesp);
1195         params->proberesp = NULL;
1196 }
1197
1198
1199 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1200 {
1201         struct wpa_driver_ap_params params;
1202         struct hostapd_freq_params freq;
1203         struct hostapd_iface *iface = hapd->iface;
1204         struct hostapd_config *iconf = iface->conf;
1205         struct wpabuf *beacon, *proberesp, *assocresp;
1206         int res, ret = -1;
1207
1208         if (hapd->csa_in_progress) {
1209                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1210                 return -1;
1211         }
1212
1213         hapd->beacon_set_done = 1;
1214
1215         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1216                 return -1;
1217
1218         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1219             0)
1220                 goto fail;
1221
1222         params.beacon_ies = beacon;
1223         params.proberesp_ies = proberesp;
1224         params.assocresp_ies = assocresp;
1225         params.reenable = hapd->reenable_beacon;
1226         hapd->reenable_beacon = 0;
1227
1228         if (iface->current_mode &&
1229             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1230                                     iconf->channel, iconf->ieee80211n,
1231                                     iconf->ieee80211ac,
1232                                     iconf->secondary_channel,
1233                                     iconf->vht_oper_chwidth,
1234                                     iconf->vht_oper_centr_freq_seg0_idx,
1235                                     iconf->vht_oper_centr_freq_seg1_idx,
1236                                     iface->current_mode->vht_capab) == 0)
1237                 params.freq = &freq;
1238
1239         res = hostapd_drv_set_ap(hapd, &params);
1240         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1241         if (res)
1242                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1243         else
1244                 ret = 0;
1245 fail:
1246         ieee802_11_free_ap_params(&params);
1247         return ret;
1248 }
1249
1250
1251 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1252 {
1253         size_t i;
1254         int ret = 0;
1255
1256         for (i = 0; i < iface->num_bss; i++) {
1257                 if (iface->bss[i]->started &&
1258                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1259                         ret = -1;
1260         }
1261
1262         return ret;
1263 }
1264
1265
1266 /* only update beacons if started */
1267 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1268 {
1269         size_t i;
1270         int ret = 0;
1271
1272         for (i = 0; i < iface->num_bss; i++) {
1273                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1274                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1275                         ret = -1;
1276         }
1277
1278         return ret;
1279 }
1280
1281 #endif /* CONFIG_NATIVE_WINDOWS */