src/ap/beacon.c

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