src/ap/beacon.c

   1 /*
   2  * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
   3  * Copyright (c) 2002-2004, Instant802 Networks, Inc.
   4  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   5  * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
   6  *
   7  * This software may be distributed under the terms of the BSD license.
   8  * See README for more details.
   9  */
  10
  11 #include "utils/includes.h"
  12
  13 #ifndef CONFIG_NATIVE_WINDOWS
  14
  15 #include "utils/common.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "common/ieee802_11_common.h"
  18 #include "common/hw_features_common.h"
  19 #include "wps/wps_defs.h"
  20 #include "p2p/p2p.h"
  21 #include "hostapd.h"
  22 #include "ieee802_11.h"
  23 #include "wpa_auth.h"
  24 #include "wmm.h"
  25 #include "ap_config.h"
  26 #include "sta_info.h"
  27 #include "p2p_hostapd.h"
  28 #include "ap_drv_ops.h"
  29 #include "beacon.h"
  30 #include "hs20.h"
  31 #include "dfs.h"
  32
  33
  34 #ifdef NEED_AP_MLME
  35
  36 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
  37                                          size_t len)
  38 {
  39         if (!hapd->conf->radio_measurements || len < 2 + 4)
  40                 return eid;
  41
  42         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  43         *eid++ = 5;
  44         *eid++ = (hapd->conf->radio_measurements & BIT(0)) ?
  45                 WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00;
  46         *eid++ = 0x00;
  47         *eid++ = 0x00;
  48         *eid++ = 0x00;
  49         *eid++ = 0x00;
  50         return eid;
  51 }
  52
  53
  54 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  55 {
  56         if (len < 2 + 5)
  57                 return eid;
  58
  59 #ifdef CONFIG_TESTING_OPTIONS
  60         if (hapd->conf->bss_load_test_set) {
  61                 *eid++ = WLAN_EID_BSS_LOAD;
  62                 *eid++ = 5;
  63                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  64                 eid += 5;
  65                 return eid;
  66         }
  67 #endif /* CONFIG_TESTING_OPTIONS */
  68         if (hapd->conf->bss_load_update_period) {
  69                 *eid++ = WLAN_EID_BSS_LOAD;
  70                 *eid++ = 5;
  71                 WPA_PUT_LE16(eid, hapd->num_sta);
  72                 eid += 2;
  73                 *eid++ = hapd->iface->channel_utilization;
  74                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  75                 eid += 2;
  76         }
  77         return eid;
  78 }
  79
  80
  81 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  82 {
  83         u8 erp = 0;
  84
  85         if (hapd->iface->current_mode == NULL ||
  86             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  87                 return 0;
  88
  89         if (hapd->iface->olbc)
  90                 erp |= ERP_INFO_USE_PROTECTION;
  91         if (hapd->iface->num_sta_non_erp > 0) {
  92                 erp |= ERP_INFO_NON_ERP_PRESENT |
  93                         ERP_INFO_USE_PROTECTION;
  94         }
  95         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  96             hapd->iconf->preamble == LONG_PREAMBLE)
  97                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  98
  99         return erp;
 100 }
 101
 102
 103 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 104 {
 105         *eid++ = WLAN_EID_DS_PARAMS;
 106         *eid++ = 1;
 107         *eid++ = hapd->iconf->channel;
 108         return eid;
 109 }
 110
 111
 112 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 113 {
 114         if (hapd->iface->current_mode == NULL ||
 115             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 116                 return eid;
 117
 118         /* Set NonERP_present and use_protection bits if there
 119          * are any associated NonERP stations. */
 120         /* TODO: use_protection bit can be set to zero even if
 121          * there are NonERP stations present. This optimization
 122          * might be useful if NonERP stations are "quiet".
 123          * See 802.11g/D6 E-1 for recommended practice.
 124          * In addition, Non ERP present might be set, if AP detects Non ERP
 125          * operation on other APs. */
 126
 127         /* Add ERP Information element */
 128         *eid++ = WLAN_EID_ERP_INFO;
 129         *eid++ = 1;
 130         *eid++ = ieee802_11_erp_info(hapd);
 131
 132         return eid;
 133 }
 134
 135
 136 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 137 {
 138         u8 *pos = eid;
 139         u8 local_pwr_constraint = 0;
 140         int dfs;
 141
 142         if (hapd->iface->current_mode == NULL ||
 143             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 144                 return eid;
 145
 146         /* Let host drivers add this IE if DFS support is offloaded */
 147         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 148                 return eid;
 149
 150         /*
 151          * There is no DFS support and power constraint was not directly
 152          * requested by config option.
 153          */
 154         if (!hapd->iconf->ieee80211h &&
 155             hapd->iconf->local_pwr_constraint == -1)
 156                 return eid;
 157
 158         /* Check if DFS is required by regulatory. */
 159         dfs = hostapd_is_dfs_required(hapd->iface);
 160         if (dfs < 0) {
 161                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 162                            dfs);
 163                 dfs = 0;
 164         }
 165
 166         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 167                 return eid;
 168
 169         /*
 170          * ieee80211h (DFS) is enabled so Power Constraint element shall
 171          * be added when running on DFS channel whenever local_pwr_constraint
 172          * is configured or not. In order to meet regulations when TPC is not
 173          * implemented using a transmit power that is below the legal maximum
 174          * (including any mitigation factor) should help. In this case,
 175          * indicate 3 dB below maximum allowed transmit power.
 176          */
 177         if (hapd->iconf->local_pwr_constraint == -1)
 178                 local_pwr_constraint = 3;
 179
 180         /*
 181          * A STA that is not an AP shall use a transmit power less than or
 182          * equal to the local maximum transmit power level for the channel.
 183          * The local maximum transmit power can be calculated from the formula:
 184          * local max TX pwr = max TX pwr - local pwr constraint
 185          * Where max TX pwr is maximum transmit power level specified for
 186          * channel in Country element and local pwr constraint is specified
 187          * for channel in this Power Constraint element.
 188          */
 189
 190         /* Element ID */
 191         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 192         /* Length */
 193         *pos++ = 1;
 194         /* Local Power Constraint */
 195         if (local_pwr_constraint)
 196                 *pos++ = local_pwr_constraint;
 197         else
 198                 *pos++ = hapd->iconf->local_pwr_constraint;
 199
 200         return pos;
 201 }
 202
 203
 204 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 205                                     struct hostapd_channel_data *start,
 206                                     struct hostapd_channel_data *prev)
 207 {
 208         if (end - pos < 3)
 209                 return pos;
 210
 211         /* first channel number */
 212         *pos++ = start->chan;
 213         /* number of channels */
 214         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 215         /* maximum transmit power level */
 216         *pos++ = start->max_tx_power;
 217
 218         return pos;
 219 }
 220
 221
 222 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 223                                 int max_len)
 224 {
 225         u8 *pos = eid;
 226         u8 *end = eid + max_len;
 227         int i;
 228         struct hostapd_hw_modes *mode;
 229         struct hostapd_channel_data *start, *prev;
 230         int chan_spacing = 1;
 231
 232         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 233             hapd->iface->current_mode == NULL)
 234                 return eid;
 235
 236         *pos++ = WLAN_EID_COUNTRY;
 237         pos++; /* length will be set later */
 238         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 239         pos += 3;
 240
 241         mode = hapd->iface->current_mode;
 242         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 243                 chan_spacing = 4;
 244
 245         start = prev = NULL;
 246         for (i = 0; i < mode->num_channels; i++) {
 247                 struct hostapd_channel_data *chan = &mode->channels[i];
 248                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 249                         continue;
 250                 if (start && prev &&
 251                     prev->chan + chan_spacing == chan->chan &&
 252                     start->max_tx_power == chan->max_tx_power) {
 253                         prev = chan;
 254                         continue; /* can use same entry */
 255                 }
 256
 257                 if (start && prev) {
 258                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 259                                                       start, prev);
 260                         start = NULL;
 261                 }
 262
 263                 /* Start new group */
 264                 start = prev = chan;
 265         }
 266
 267         if (start) {
 268                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 269                                               start, prev);
 270         }
 271
 272         if ((pos - eid) & 1) {
 273                 if (end - pos < 1)
 274                         return eid;
 275                 *pos++ = 0; /* pad for 16-bit alignment */
 276         }
 277
 278         eid[1] = (pos - eid) - 2;
 279
 280         return pos;
 281 }
 282
 283
 284 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 285 {
 286         const u8 *ie;
 287         size_t ielen;
 288
 289         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 290         if (ie == NULL || ielen > len)
 291                 return eid;
 292
 293         os_memcpy(eid, ie, ielen);
 294         return eid + ielen;
 295 }
 296
 297
 298 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 299 {
 300 #ifdef CONFIG_TESTING_OPTIONS
 301         if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
 302                 return eid;
 303 #endif /* CONFIG_TESTING_OPTIONS */
 304
 305         if (!hapd->cs_freq_params.channel)
 306                 return eid;
 307
 308         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 309         *eid++ = 3;
 310         *eid++ = hapd->cs_block_tx;
 311         *eid++ = hapd->cs_freq_params.channel;
 312         *eid++ = hapd->cs_count;
 313
 314         return eid;
 315 }
 316
 317
 318 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 319 {
 320         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 321                 return eid;
 322
 323         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 324         *eid++ = 4;
 325         *eid++ = hapd->cs_block_tx;
 326         *eid++ = hapd->iface->cs_oper_class;
 327         *eid++ = hapd->cs_freq_params.channel;
 328         *eid++ = hapd->cs_count;
 329
 330         return eid;
 331 }
 332
 333
 334 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
 335 {
 336         u8 op_class, channel;
 337
 338         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
 339             !hapd->iface->freq)
 340                 return eid;
 341
 342         if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
 343                                           hapd->iconf->secondary_channel,
 344                                           hapd->iconf->vht_oper_chwidth,
 345                                           &op_class, &channel) ==
 346             NUM_HOSTAPD_MODES)
 347                 return eid;
 348
 349         *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
 350         *eid++ = 2;
 351
 352         /* Current Operating Class */
 353         *eid++ = op_class;
 354
 355         /* TODO: Advertise all the supported operating classes */
 356         *eid++ = 0;
 357
 358         return eid;
 359 }
 360
 361
 362 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 363                                    const struct ieee80211_mgmt *req,
 364                                    int is_p2p, size_t *resp_len)
 365 {
 366         struct ieee80211_mgmt *resp;
 367         u8 *pos, *epos, *csa_pos;
 368         size_t buflen;
 369
 370 #define MAX_PROBERESP_LEN 768
 371         buflen = MAX_PROBERESP_LEN;
 372 #ifdef CONFIG_WPS
 373         if (hapd->wps_probe_resp_ie)
 374                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 375 #endif /* CONFIG_WPS */
 376 #ifdef CONFIG_P2P
 377         if (hapd->p2p_probe_resp_ie)
 378                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 379 #endif /* CONFIG_P2P */
 380 #ifdef CONFIG_FST
 381         if (hapd->iface->fst_ies)
 382                 buflen += wpabuf_len(hapd->iface->fst_ies);
 383 #endif /* CONFIG_FST */
 384         if (hapd->conf->vendor_elements)
 385                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 386         if (hapd->conf->vendor_vht) {
 387                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 388                         2 + sizeof(struct ieee80211_vht_operation);
 389         }
 390         resp = os_zalloc(buflen);
 391         if (resp == NULL)
 392                 return NULL;
 393
 394         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 395
 396         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 397                                            WLAN_FC_STYPE_PROBE_RESP);
 398         if (req)
 399                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 400         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 401
 402         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 403         resp->u.probe_resp.beacon_int =
 404                 host_to_le16(hapd->iconf->beacon_int);
 405
 406         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 407         resp->u.probe_resp.capab_info =
 408                 host_to_le16(hostapd_own_capab_info(hapd));
 409
 410         pos = resp->u.probe_resp.variable;
 411         *pos++ = WLAN_EID_SSID;
 412         *pos++ = hapd->conf->ssid.ssid_len;
 413         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 414         pos += hapd->conf->ssid.ssid_len;
 415
 416         /* Supported rates */
 417         pos = hostapd_eid_supp_rates(hapd, pos);
 418
 419         /* DS Params */
 420         pos = hostapd_eid_ds_params(hapd, pos);
 421
 422         pos = hostapd_eid_country(hapd, pos, epos - pos);
 423
 424         /* Power Constraint element */
 425         pos = hostapd_eid_pwr_constraint(hapd, pos);
 426
 427         /* CSA IE */
 428         csa_pos = hostapd_eid_csa(hapd, pos);
 429         if (csa_pos != pos)
 430                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 431         pos = csa_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         /* eCSA IE */
 447         csa_pos = hostapd_eid_ecsa(hapd, pos);
 448         if (csa_pos != pos)
 449                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 450         pos = csa_pos;
 451
 452         pos = hostapd_eid_supported_op_classes(hapd, pos);
 453
 454 #ifdef CONFIG_IEEE80211N
 455         /* Secondary Channel Offset element */
 456         /* TODO: The standard doesn't specify a position for this element. */
 457         pos = hostapd_eid_secondary_channel(hapd, pos);
 458
 459         pos = hostapd_eid_ht_capabilities(hapd, pos);
 460         pos = hostapd_eid_ht_operation(hapd, pos);
 461 #endif /* CONFIG_IEEE80211N */
 462
 463         pos = hostapd_eid_ext_capab(hapd, pos);
 464
 465         pos = hostapd_eid_time_adv(hapd, pos);
 466         pos = hostapd_eid_time_zone(hapd, pos);
 467
 468         pos = hostapd_eid_interworking(hapd, pos);
 469         pos = hostapd_eid_adv_proto(hapd, pos);
 470         pos = hostapd_eid_roaming_consortium(hapd, pos);
 471
 472 #ifdef CONFIG_FST
 473         if (hapd->iface->fst_ies) {
 474                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 475                           wpabuf_len(hapd->iface->fst_ies));
 476                 pos += wpabuf_len(hapd->iface->fst_ies);
 477         }
 478 #endif /* CONFIG_FST */
 479
 480 #ifdef CONFIG_IEEE80211AC
 481         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 482                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 483                 pos = hostapd_eid_vht_operation(hapd, pos);
 484                 pos = hostapd_eid_txpower_envelope(hapd, pos);
 485                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 486         }
 487         if (hapd->conf->vendor_vht)
 488                 pos = hostapd_eid_vendor_vht(hapd, pos);
 489 #endif /* CONFIG_IEEE80211AC */
 490
 491         /* Wi-Fi Alliance WMM */
 492         pos = hostapd_eid_wmm(hapd, pos);
 493
 494 #ifdef CONFIG_WPS
 495         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 496                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 497                           wpabuf_len(hapd->wps_probe_resp_ie));
 498                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 499         }
 500 #endif /* CONFIG_WPS */
 501
 502 #ifdef CONFIG_P2P
 503         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 504             hapd->p2p_probe_resp_ie) {
 505                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 506                           wpabuf_len(hapd->p2p_probe_resp_ie));
 507                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 508         }
 509 #endif /* CONFIG_P2P */
 510 #ifdef CONFIG_P2P_MANAGER
 511         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 512             P2P_MANAGE)
 513                 pos = hostapd_eid_p2p_manage(hapd, pos);
 514 #endif /* CONFIG_P2P_MANAGER */
 515
 516 #ifdef CONFIG_HS20
 517         pos = hostapd_eid_hs20_indication(hapd, pos);
 518         pos = hostapd_eid_osen(hapd, pos);
 519 #endif /* CONFIG_HS20 */
 520
 521         if (hapd->conf->vendor_elements) {
 522                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 523                           wpabuf_len(hapd->conf->vendor_elements));
 524                 pos += wpabuf_len(hapd->conf->vendor_elements);
 525         }
 526
 527         *resp_len = pos - (u8 *) resp;
 528         return (u8 *) resp;
 529 }
 530
 531
 532 enum ssid_match_result {
 533         NO_SSID_MATCH,
 534         EXACT_SSID_MATCH,
 535         WILDCARD_SSID_MATCH
 536 };
 537
 538 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 539                                          const u8 *ssid, size_t ssid_len,
 540                                          const u8 *ssid_list,
 541                                          size_t ssid_list_len)
 542 {
 543         const u8 *pos, *end;
 544         int wildcard = 0;
 545
 546         if (ssid_len == 0)
 547                 wildcard = 1;
 548         if (ssid_len == hapd->conf->ssid.ssid_len &&
 549             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 550                 return EXACT_SSID_MATCH;
 551
 552         if (ssid_list == NULL)
 553                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 554
 555         pos = ssid_list;
 556         end = ssid_list + ssid_list_len;
 557         while (end - pos >= 1) {
 558                 if (2 + pos[1] > end - pos)
 559                         break;
 560                 if (pos[1] == 0)
 561                         wildcard = 1;
 562                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 563                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 564                         return EXACT_SSID_MATCH;
 565                 pos += 2 + pos[1];
 566         }
 567
 568         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 569 }
 570
 571
 572 void sta_track_expire(struct hostapd_iface *iface, int force)
 573 {
 574         struct os_reltime now;
 575         struct hostapd_sta_info *info;
 576
 577         if (!iface->num_sta_seen)
 578                 return;
 579
 580         os_get_reltime(&now);
 581         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 582                                      list))) {
 583                 if (!force &&
 584                     !os_reltime_expired(&now, &info->last_seen,
 585                                         iface->conf->track_sta_max_age))
 586                         break;
 587                 force = 0;
 588
 589                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 590                            MACSTR, iface->bss[0]->conf->iface,
 591                            MAC2STR(info->addr));
 592                 dl_list_del(&info->list);
 593                 iface->num_sta_seen--;
 594                 os_free(info);
 595         }
 596 }
 597
 598
 599 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 600                                                const u8 *addr)
 601 {
 602         struct hostapd_sta_info *info;
 603
 604         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 605                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 606                         return info;
 607
 608         return NULL;
 609 }
 610
 611
 612 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 613 {
 614         struct hostapd_sta_info *info;
 615
 616         info = sta_track_get(iface, addr);
 617         if (info) {
 618                 /* Move the most recent entry to the end of the list */
 619                 dl_list_del(&info->list);
 620                 dl_list_add_tail(&iface->sta_seen, &info->list);
 621                 os_get_reltime(&info->last_seen);
 622                 return;
 623         }
 624
 625         /* Add a new entry */
 626         info = os_zalloc(sizeof(*info));
 627         os_memcpy(info->addr, addr, ETH_ALEN);
 628         os_get_reltime(&info->last_seen);
 629
 630         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 631                 /* Expire oldest entry to make room for a new one */
 632                 sta_track_expire(iface, 1);
 633         }
 634
 635         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 636                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 637         dl_list_add_tail(&iface->sta_seen, &info->list);
 638         iface->num_sta_seen++;
 639 }
 640
 641
 642 struct hostapd_data *
 643 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 644                   const char *ifname)
 645 {
 646         struct hapd_interfaces *interfaces = iface->interfaces;
 647         size_t i, j;
 648
 649         for (i = 0; i < interfaces->count; i++) {
 650                 struct hostapd_data *hapd = NULL;
 651
 652                 iface = interfaces->iface[i];
 653                 for (j = 0; j < iface->num_bss; j++) {
 654                         hapd = iface->bss[j];
 655                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 656                                 break;
 657                         hapd = NULL;
 658                 }
 659
 660                 if (hapd && sta_track_get(iface, addr))
 661                         return hapd;
 662         }
 663
 664         return NULL;
 665 }
 666
 667
 668 void handle_probe_req(struct hostapd_data *hapd,
 669                       const struct ieee80211_mgmt *mgmt, size_t len,
 670                       int ssi_signal)
 671 {
 672         u8 *resp;
 673         struct ieee802_11_elems elems;
 674         const u8 *ie;
 675         size_t ie_len;
 676         size_t i, resp_len;
 677         int noack;
 678         enum ssid_match_result res;
 679         int ret;
 680         u16 csa_offs[2];
 681         size_t csa_offs_len;
 682
 683         ie = mgmt->u.probe_req.variable;
 684         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 685                 return;
 686         if (hapd->iconf->track_sta_max_num)
 687                 sta_track_add(hapd->iface, mgmt->sa);
 688         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 689
 690         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 691                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 692                                             mgmt->sa, mgmt->da, mgmt->bssid,
 693                                             ie, ie_len, ssi_signal) > 0)
 694                         return;
 695
 696         if (!hapd->iconf->send_probe_response)
 697                 return;
 698
 699         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 700                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 701                            MAC2STR(mgmt->sa));
 702                 return;
 703         }
 704
 705         if ((!elems.ssid || !elems.supp_rates)) {
 706                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 707                            "without SSID or supported rates element",
 708                            MAC2STR(mgmt->sa));
 709                 return;
 710         }
 711
 712         /*
 713          * No need to reply if the Probe Request frame was sent on an adjacent
 714          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 715          * AP with dot11RadioMeasurementActivated set to true, but strictly
 716          * speaking does not allow such ignoring of Probe Request frames if
 717          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 718          * number of unnecessary Probe Response frames for cases where the STA
 719          * is less likely to see them (Probe Request frame sent on a
 720          * neighboring, but partially overlapping, channel).
 721          */
 722         if (elems.ds_params &&
 723             hapd->iface->current_mode &&
 724             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 725              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 726             hapd->iconf->channel != elems.ds_params[0]) {
 727                 wpa_printf(MSG_DEBUG,
 728                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 729                            hapd->iconf->channel, elems.ds_params[0]);
 730                 return;
 731         }
 732
 733 #ifdef CONFIG_P2P
 734         if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
 735                 struct wpabuf *wps;
 736                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 737                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 738                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 739                                    "due to mismatch with Requested Device "
 740                                    "Type");
 741                         wpabuf_free(wps);
 742                         return;
 743                 }
 744                 wpabuf_free(wps);
 745         }
 746
 747         if (hapd->p2p && hapd->p2p_group && elems.p2p) {
 748                 struct wpabuf *p2p;
 749                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 750                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 751                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 752                                    "due to mismatch with Device ID");
 753                         wpabuf_free(p2p);
 754                         return;
 755                 }
 756                 wpabuf_free(p2p);
 757         }
 758 #endif /* CONFIG_P2P */
 759
 760         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 761             elems.ssid_list_len == 0) {
 762                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 763                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 764                 return;
 765         }
 766
 767 #ifdef CONFIG_P2P
 768         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 769             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 770             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 771                       P2P_WILDCARD_SSID_LEN) == 0) {
 772                 /* Process P2P Wildcard SSID like Wildcard SSID */
 773                 elems.ssid_len = 0;
 774         }
 775 #endif /* CONFIG_P2P */
 776
 777         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 778                          elems.ssid_list, elems.ssid_list_len);
 779         if (res == NO_SSID_MATCH) {
 780                 if (!(mgmt->da[0] & 0x01)) {
 781                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 782                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 783                                    MAC2STR(mgmt->sa),
 784                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 785                                    MAC2STR(mgmt->da),
 786                                    elems.ssid_list ? " (SSID list)" : "");
 787                 }
 788                 return;
 789         }
 790
 791 #ifdef CONFIG_INTERWORKING
 792         if (hapd->conf->interworking &&
 793             elems.interworking && elems.interworking_len >= 1) {
 794                 u8 ant = elems.interworking[0] & 0x0f;
 795                 if (ant != INTERWORKING_ANT_WILDCARD &&
 796                     ant != hapd->conf->access_network_type) {
 797                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 798                                    " for mismatching ANT %u ignored",
 799                                    MAC2STR(mgmt->sa), ant);
 800                         return;
 801                 }
 802         }
 803
 804         if (hapd->conf->interworking && elems.interworking &&
 805             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 806                 const u8 *hessid;
 807                 if (elems.interworking_len == 7)
 808                         hessid = elems.interworking + 1;
 809                 else
 810                         hessid = elems.interworking + 1 + 2;
 811                 if (!is_broadcast_ether_addr(hessid) &&
 812                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 813                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 814                                    " for mismatching HESSID " MACSTR
 815                                    " ignored",
 816                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 817                         return;
 818                 }
 819         }
 820 #endif /* CONFIG_INTERWORKING */
 821
 822 #ifdef CONFIG_P2P
 823         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 824             supp_rates_11b_only(&elems)) {
 825                 /* Indicates support for 11b rates only */
 826                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 827                            MACSTR " with only 802.11b rates",
 828                            MAC2STR(mgmt->sa));
 829                 return;
 830         }
 831 #endif /* CONFIG_P2P */
 832
 833         /* TODO: verify that supp_rates contains at least one matching rate
 834          * with AP configuration */
 835
 836         if (hapd->conf->no_probe_resp_if_seen_on &&
 837             is_multicast_ether_addr(mgmt->da) &&
 838             is_multicast_ether_addr(mgmt->bssid) &&
 839             sta_track_seen_on(hapd->iface, mgmt->sa,
 840                               hapd->conf->no_probe_resp_if_seen_on)) {
 841                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 842                            " since STA has been seen on %s",
 843                            hapd->conf->iface, MAC2STR(mgmt->sa),
 844                            hapd->conf->no_probe_resp_if_seen_on);
 845                 return;
 846         }
 847
 848         if (hapd->conf->no_probe_resp_if_max_sta &&
 849             is_multicast_ether_addr(mgmt->da) &&
 850             is_multicast_ether_addr(mgmt->bssid) &&
 851             hapd->num_sta >= hapd->conf->max_num_sta &&
 852             !ap_get_sta(hapd, mgmt->sa)) {
 853                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 854                            " since no room for additional STA",
 855                            hapd->conf->iface, MAC2STR(mgmt->sa));
 856                 return;
 857         }
 858
 859 #ifdef CONFIG_TESTING_OPTIONS
 860         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 861             drand48() < hapd->iconf->ignore_probe_probability) {
 862                 wpa_printf(MSG_INFO,
 863                            "TESTING: ignoring probe request from " MACSTR,
 864                            MAC2STR(mgmt->sa));
 865                 return;
 866         }
 867 #endif /* CONFIG_TESTING_OPTIONS */
 868
 869         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 870                                       &resp_len);
 871         if (resp == NULL)
 872                 return;
 873
 874         /*
 875          * If this is a broadcast probe request, apply no ack policy to avoid
 876          * excessive retries.
 877          */
 878         noack = !!(res == WILDCARD_SSID_MATCH &&
 879                    is_broadcast_ether_addr(mgmt->da));
 880
 881         csa_offs_len = 0;
 882         if (hapd->csa_in_progress) {
 883                 if (hapd->cs_c_off_proberesp)
 884                         csa_offs[csa_offs_len++] =
 885                                 hapd->cs_c_off_proberesp;
 886
 887                 if (hapd->cs_c_off_ecsa_proberesp)
 888                         csa_offs[csa_offs_len++] =
 889                                 hapd->cs_c_off_ecsa_proberesp;
 890         }
 891
 892         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 893                                         csa_offs_len ? csa_offs : NULL,
 894                                         csa_offs_len);
 895
 896         if (ret < 0)
 897                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 898
 899         os_free(resp);
 900
 901         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 902                    "SSID", MAC2STR(mgmt->sa),
 903                    elems.ssid_len == 0 ? "broadcast" : "our");
 904 }
 905
 906
 907 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 908                                         size_t *resp_len)
 909 {
 910         /* check probe response offloading caps and print warnings */
 911         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 912                 return NULL;
 913
 914 #ifdef CONFIG_WPS
 915         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 916             (!(hapd->iface->probe_resp_offloads &
 917                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 918                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 919                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 920                            "Probe Response while not supporting this");
 921 #endif /* CONFIG_WPS */
 922
 923 #ifdef CONFIG_P2P
 924         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 925             !(hapd->iface->probe_resp_offloads &
 926               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 927                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 928                            "Probe Response while not supporting this");
 929 #endif  /* CONFIG_P2P */
 930
 931         if (hapd->conf->interworking &&
 932             !(hapd->iface->probe_resp_offloads &
 933               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 934                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 935                            "Interworking Probe Response while not supporting "
 936                            "this");
 937
 938         /* Generate a Probe Response template for the non-P2P case */
 939         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 940 }
 941
 942 #endif /* NEED_AP_MLME */
 943
 944
 945 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 946                                struct wpa_driver_ap_params *params)
 947 {
 948         struct ieee80211_mgmt *head = NULL;
 949         u8 *tail = NULL;
 950         size_t head_len = 0, tail_len = 0;
 951         u8 *resp = NULL;
 952         size_t resp_len = 0;
 953 #ifdef NEED_AP_MLME
 954         u16 capab_info;
 955         u8 *pos, *tailpos, *csa_pos;
 956
 957 #define BEACON_HEAD_BUF_SIZE 256
 958 #define BEACON_TAIL_BUF_SIZE 512
 959         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 960         tail_len = BEACON_TAIL_BUF_SIZE;
 961 #ifdef CONFIG_WPS
 962         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 963                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 964 #endif /* CONFIG_WPS */
 965 #ifdef CONFIG_P2P
 966         if (hapd->p2p_beacon_ie)
 967                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 968 #endif /* CONFIG_P2P */
 969 #ifdef CONFIG_FST
 970         if (hapd->iface->fst_ies)
 971                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 972 #endif /* CONFIG_FST */
 973         if (hapd->conf->vendor_elements)
 974                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 975
 976 #ifdef CONFIG_IEEE80211AC
 977         if (hapd->conf->vendor_vht) {
 978                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 979                         2 + sizeof(struct ieee80211_vht_operation);
 980         }
 981 #endif /* CONFIG_IEEE80211AC */
 982
 983         tailpos = tail = os_malloc(tail_len);
 984         if (head == NULL || tail == NULL) {
 985                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 986                 os_free(head);
 987                 os_free(tail);
 988                 return -1;
 989         }
 990
 991         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 992                                            WLAN_FC_STYPE_BEACON);
 993         head->duration = host_to_le16(0);
 994         os_memset(head->da, 0xff, ETH_ALEN);
 995
 996         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 997         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 998         head->u.beacon.beacon_int =
 999                 host_to_le16(hapd->iconf->beacon_int);
1000
1001         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1002         capab_info = hostapd_own_capab_info(hapd);
1003         head->u.beacon.capab_info = host_to_le16(capab_info);
1004         pos = &head->u.beacon.variable[0];
1005
1006         /* SSID */
1007         *pos++ = WLAN_EID_SSID;
1008         if (hapd->conf->ignore_broadcast_ssid == 2) {
1009                 /* clear the data, but keep the correct length of the SSID */
1010                 *pos++ = hapd->conf->ssid.ssid_len;
1011                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1012                 pos += hapd->conf->ssid.ssid_len;
1013         } else if (hapd->conf->ignore_broadcast_ssid) {
1014                 *pos++ = 0; /* empty SSID */
1015         } else {
1016                 *pos++ = hapd->conf->ssid.ssid_len;
1017                 os_memcpy(pos, hapd->conf->ssid.ssid,
1018                           hapd->conf->ssid.ssid_len);
1019                 pos += hapd->conf->ssid.ssid_len;
1020         }
1021
1022         /* Supported rates */
1023         pos = hostapd_eid_supp_rates(hapd, pos);
1024
1025         /* DS Params */
1026         pos = hostapd_eid_ds_params(hapd, pos);
1027
1028         head_len = pos - (u8 *) head;
1029
1030         tailpos = hostapd_eid_country(hapd, tailpos,
1031                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1032
1033         /* Power Constraint element */
1034         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1035
1036         /* CSA IE */
1037         csa_pos = hostapd_eid_csa(hapd, tailpos);
1038         if (csa_pos != tailpos)
1039                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1040         tailpos = csa_pos;
1041
1042         /* ERP Information element */
1043         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1044
1045         /* Extended supported rates */
1046         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1047
1048         /* RSN, MDIE, WPA */
1049         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1050                                   tailpos);
1051
1052         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1053                                                tail + BEACON_TAIL_BUF_SIZE -
1054                                                tailpos);
1055
1056         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1057                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1058
1059         /* eCSA IE */
1060         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1061         if (csa_pos != tailpos)
1062                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1063         tailpos = csa_pos;
1064
1065         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1066
1067 #ifdef CONFIG_IEEE80211N
1068         /* Secondary Channel Offset element */
1069         /* TODO: The standard doesn't specify a position for this element. */
1070         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1071
1072         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1073         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1074 #endif /* CONFIG_IEEE80211N */
1075
1076         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1077
1078         /*
1079          * TODO: Time Advertisement element should only be included in some
1080          * DTIM Beacon frames.
1081          */
1082         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1083
1084         tailpos = hostapd_eid_interworking(hapd, tailpos);
1085         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1086         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1087
1088 #ifdef CONFIG_FST
1089         if (hapd->iface->fst_ies) {
1090                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1091                           wpabuf_len(hapd->iface->fst_ies));
1092                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1093         }
1094 #endif /* CONFIG_FST */
1095
1096 #ifdef CONFIG_IEEE80211AC
1097         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1098                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1099                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1100                 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1101                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1102         }
1103         if (hapd->conf->vendor_vht)
1104                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1105 #endif /* CONFIG_IEEE80211AC */
1106
1107         /* Wi-Fi Alliance WMM */
1108         tailpos = hostapd_eid_wmm(hapd, tailpos);
1109
1110 #ifdef CONFIG_WPS
1111         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1112                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1113                           wpabuf_len(hapd->wps_beacon_ie));
1114                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1115         }
1116 #endif /* CONFIG_WPS */
1117
1118 #ifdef CONFIG_P2P
1119         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1120                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1121                           wpabuf_len(hapd->p2p_beacon_ie));
1122                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1123         }
1124 #endif /* CONFIG_P2P */
1125 #ifdef CONFIG_P2P_MANAGER
1126         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1127             P2P_MANAGE)
1128                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1129 #endif /* CONFIG_P2P_MANAGER */
1130
1131 #ifdef CONFIG_HS20
1132         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1133         tailpos = hostapd_eid_osen(hapd, tailpos);
1134 #endif /* CONFIG_HS20 */
1135
1136         if (hapd->conf->vendor_elements) {
1137                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1138                           wpabuf_len(hapd->conf->vendor_elements));
1139                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1140         }
1141
1142         tail_len = tailpos > tail ? tailpos - tail : 0;
1143
1144         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1145 #endif /* NEED_AP_MLME */
1146
1147         os_memset(params, 0, sizeof(*params));
1148         params->head = (u8 *) head;
1149         params->head_len = head_len;
1150         params->tail = tail;
1151         params->tail_len = tail_len;
1152         params->proberesp = resp;
1153         params->proberesp_len = resp_len;
1154         params->dtim_period = hapd->conf->dtim_period;
1155         params->beacon_int = hapd->iconf->beacon_int;
1156         params->basic_rates = hapd->iface->basic_rates;
1157         params->ssid = hapd->conf->ssid.ssid;
1158         params->ssid_len = hapd->conf->ssid.ssid_len;
1159         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1160             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1161                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1162                         hapd->conf->rsn_pairwise;
1163         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1164                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1165         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1166                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1167         params->group_cipher = hapd->conf->wpa_group;
1168         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1169         params->auth_algs = hapd->conf->auth_algs;
1170         params->wpa_version = hapd->conf->wpa;
1171         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1172                 (hapd->conf->ieee802_1x &&
1173                  (hapd->conf->default_wep_key_len ||
1174                   hapd->conf->individual_wep_key_len));
1175         switch (hapd->conf->ignore_broadcast_ssid) {
1176         case 0:
1177                 params->hide_ssid = NO_SSID_HIDING;
1178                 break;
1179         case 1:
1180                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1181                 break;
1182         case 2:
1183                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1184                 break;
1185         }
1186         params->isolate = hapd->conf->isolate;
1187         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1188 #ifdef NEED_AP_MLME
1189         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1190                                 ERP_INFO_USE_PROTECTION);
1191         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1192                 hapd->iconf->preamble == SHORT_PREAMBLE;
1193         if (hapd->iface->current_mode &&
1194             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1195                 params->short_slot_time =
1196                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1197         else
1198                 params->short_slot_time = -1;
1199         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1200                 params->ht_opmode = -1;
1201         else
1202                 params->ht_opmode = hapd->iface->ht_op_mode;
1203 #endif /* NEED_AP_MLME */
1204         params->interworking = hapd->conf->interworking;
1205         if (hapd->conf->interworking &&
1206             !is_zero_ether_addr(hapd->conf->hessid))
1207                 params->hessid = hapd->conf->hessid;
1208         params->access_network_type = hapd->conf->access_network_type;
1209         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1210 #ifdef CONFIG_P2P
1211         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1212 #endif /* CONFIG_P2P */
1213 #ifdef CONFIG_HS20
1214         params->disable_dgaf = hapd->conf->disable_dgaf;
1215         if (hapd->conf->osen) {
1216                 params->privacy = 1;
1217                 params->osen = 1;
1218         }
1219 #endif /* CONFIG_HS20 */
1220         params->pbss = hapd->conf->pbss;
1221         return 0;
1222 }
1223
1224
1225 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1226 {
1227         os_free(params->tail);
1228         params->tail = NULL;
1229         os_free(params->head);
1230         params->head = NULL;
1231         os_free(params->proberesp);
1232         params->proberesp = NULL;
1233 }
1234
1235
1236 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1237 {
1238         struct wpa_driver_ap_params params;
1239         struct hostapd_freq_params freq;
1240         struct hostapd_iface *iface = hapd->iface;
1241         struct hostapd_config *iconf = iface->conf;
1242         struct wpabuf *beacon, *proberesp, *assocresp;
1243         int res, ret = -1;
1244
1245         if (hapd->csa_in_progress) {
1246                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1247                 return -1;
1248         }
1249
1250         hapd->beacon_set_done = 1;
1251
1252         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1253                 return -1;
1254
1255         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1256             0)
1257                 goto fail;
1258
1259         params.beacon_ies = beacon;
1260         params.proberesp_ies = proberesp;
1261         params.assocresp_ies = assocresp;
1262         params.reenable = hapd->reenable_beacon;
1263         hapd->reenable_beacon = 0;
1264
1265         if (iface->current_mode &&
1266             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1267                                     iconf->channel, iconf->ieee80211n,
1268                                     iconf->ieee80211ac,
1269                                     iconf->secondary_channel,
1270                                     iconf->vht_oper_chwidth,
1271                                     iconf->vht_oper_centr_freq_seg0_idx,
1272                                     iconf->vht_oper_centr_freq_seg1_idx,
1273                                     iface->current_mode->vht_capab) == 0)
1274                 params.freq = &freq;
1275
1276         res = hostapd_drv_set_ap(hapd, &params);
1277         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1278         if (res)
1279                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1280         else
1281                 ret = 0;
1282 fail:
1283         ieee802_11_free_ap_params(&params);
1284         return ret;
1285 }
1286
1287
1288 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1289 {
1290         size_t i;
1291         int ret = 0;
1292
1293         for (i = 0; i < iface->num_bss; i++) {
1294                 if (iface->bss[i]->started &&
1295                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1296                         ret = -1;
1297         }
1298
1299         return ret;
1300 }
1301
1302
1303 /* only update beacons if started */
1304 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1305 {
1306         size_t i;
1307         int ret = 0;
1308
1309         for (i = 0; i < iface->num_bss; i++) {
1310                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1311                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1312                         ret = -1;
1313         }
1314
1315         return ret;
1316 }
1317
1318 #endif /* CONFIG_NATIVE_WINDOWS */