src/ap/beacon.c

   1 /*
   2  * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
   3  * Copyright (c) 2002-2004, Instant802 Networks, Inc.
   4  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   5  * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
   6  *
   7  * This software may be distributed under the terms of the BSD license.
   8  * See README for more details.
   9  */
  10
  11 #include "utils/includes.h"
  12
  13 #ifndef CONFIG_NATIVE_WINDOWS
  14
  15 #include "utils/common.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "common/ieee802_11_common.h"
  18 #include "common/hw_features_common.h"
  19 #include "wps/wps_defs.h"
  20 #include "p2p/p2p.h"
  21 #include "hostapd.h"
  22 #include "ieee802_11.h"
  23 #include "wpa_auth.h"
  24 #include "wmm.h"
  25 #include "ap_config.h"
  26 #include "sta_info.h"
  27 #include "p2p_hostapd.h"
  28 #include "ap_drv_ops.h"
  29 #include "beacon.h"
  30 #include "hs20.h"
  31 #include "dfs.h"
  32
  33
  34 #ifdef NEED_AP_MLME
  35
  36 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
  37                                          size_t len)
  38 {
  39         if (!hapd->conf->radio_measurements || len < 2 + 4)
  40                 return eid;
  41
  42         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  43         *eid++ = 5;
  44         *eid++ = (hapd->conf->radio_measurements & BIT(0)) ?
  45                 WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00;
  46         *eid++ = 0x00;
  47         *eid++ = 0x00;
  48         *eid++ = 0x00;
  49         *eid++ = 0x00;
  50         return eid;
  51 }
  52
  53
  54 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  55 {
  56         if (len < 2 + 5)
  57                 return eid;
  58
  59 #ifdef CONFIG_TESTING_OPTIONS
  60         if (hapd->conf->bss_load_test_set) {
  61                 *eid++ = WLAN_EID_BSS_LOAD;
  62                 *eid++ = 5;
  63                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  64                 eid += 5;
  65                 return eid;
  66         }
  67 #endif /* CONFIG_TESTING_OPTIONS */
  68         if (hapd->conf->bss_load_update_period) {
  69                 *eid++ = WLAN_EID_BSS_LOAD;
  70                 *eid++ = 5;
  71                 WPA_PUT_LE16(eid, hapd->num_sta);
  72                 eid += 2;
  73                 *eid++ = hapd->iface->channel_utilization;
  74                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  75                 eid += 2;
  76         }
  77         return eid;
  78 }
  79
  80
  81 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  82 {
  83         u8 erp = 0;
  84
  85         if (hapd->iface->current_mode == NULL ||
  86             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  87                 return 0;
  88
  89         if (hapd->iface->olbc)
  90                 erp |= ERP_INFO_USE_PROTECTION;
  91         if (hapd->iface->num_sta_non_erp > 0) {
  92                 erp |= ERP_INFO_NON_ERP_PRESENT |
  93                         ERP_INFO_USE_PROTECTION;
  94         }
  95         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  96             hapd->iconf->preamble == LONG_PREAMBLE)
  97                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  98
  99         return erp;
 100 }
 101
 102
 103 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 104 {
 105         *eid++ = WLAN_EID_DS_PARAMS;
 106         *eid++ = 1;
 107         *eid++ = hapd->iconf->channel;
 108         return eid;
 109 }
 110
 111
 112 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 113 {
 114         if (hapd->iface->current_mode == NULL ||
 115             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 116                 return eid;
 117
 118         /* Set NonERP_present and use_protection bits if there
 119          * are any associated NonERP stations. */
 120         /* TODO: use_protection bit can be set to zero even if
 121          * there are NonERP stations present. This optimization
 122          * might be useful if NonERP stations are "quiet".
 123          * See 802.11g/D6 E-1 for recommended practice.
 124          * In addition, Non ERP present might be set, if AP detects Non ERP
 125          * operation on other APs. */
 126
 127         /* Add ERP Information element */
 128         *eid++ = WLAN_EID_ERP_INFO;
 129         *eid++ = 1;
 130         *eid++ = ieee802_11_erp_info(hapd);
 131
 132         return eid;
 133 }
 134
 135
 136 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 137 {
 138         u8 *pos = eid;
 139         u8 local_pwr_constraint = 0;
 140         int dfs;
 141
 142         if (hapd->iface->current_mode == NULL ||
 143             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 144                 return eid;
 145
 146         /* Let host drivers add this IE if DFS support is offloaded */
 147         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 148                 return eid;
 149
 150         /*
 151          * There is no DFS support and power constraint was not directly
 152          * requested by config option.
 153          */
 154         if (!hapd->iconf->ieee80211h &&
 155             hapd->iconf->local_pwr_constraint == -1)
 156                 return eid;
 157
 158         /* Check if DFS is required by regulatory. */
 159         dfs = hostapd_is_dfs_required(hapd->iface);
 160         if (dfs < 0) {
 161                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 162                            dfs);
 163                 dfs = 0;
 164         }
 165
 166         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 167                 return eid;
 168
 169         /*
 170          * ieee80211h (DFS) is enabled so Power Constraint element shall
 171          * be added when running on DFS channel whenever local_pwr_constraint
 172          * is configured or not. In order to meet regulations when TPC is not
 173          * implemented using a transmit power that is below the legal maximum
 174          * (including any mitigation factor) should help. In this case,
 175          * indicate 3 dB below maximum allowed transmit power.
 176          */
 177         if (hapd->iconf->local_pwr_constraint == -1)
 178                 local_pwr_constraint = 3;
 179
 180         /*
 181          * A STA that is not an AP shall use a transmit power less than or
 182          * equal to the local maximum transmit power level for the channel.
 183          * The local maximum transmit power can be calculated from the formula:
 184          * local max TX pwr = max TX pwr - local pwr constraint
 185          * Where max TX pwr is maximum transmit power level specified for
 186          * channel in Country element and local pwr constraint is specified
 187          * for channel in this Power Constraint element.
 188          */
 189
 190         /* Element ID */
 191         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 192         /* Length */
 193         *pos++ = 1;
 194         /* Local Power Constraint */
 195         if (local_pwr_constraint)
 196                 *pos++ = local_pwr_constraint;
 197         else
 198                 *pos++ = hapd->iconf->local_pwr_constraint;
 199
 200         return pos;
 201 }
 202
 203
 204 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 205                                     struct hostapd_channel_data *start,
 206                                     struct hostapd_channel_data *prev)
 207 {
 208         if (end - pos < 3)
 209                 return pos;
 210
 211         /* first channel number */
 212         *pos++ = start->chan;
 213         /* number of channels */
 214         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 215         /* maximum transmit power level */
 216         *pos++ = start->max_tx_power;
 217
 218         return pos;
 219 }
 220
 221
 222 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 223                                 int max_len)
 224 {
 225         u8 *pos = eid;
 226         u8 *end = eid + max_len;
 227         int i;
 228         struct hostapd_hw_modes *mode;
 229         struct hostapd_channel_data *start, *prev;
 230         int chan_spacing = 1;
 231
 232         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 233             hapd->iface->current_mode == NULL)
 234                 return eid;
 235
 236         *pos++ = WLAN_EID_COUNTRY;
 237         pos++; /* length will be set later */
 238         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 239         pos += 3;
 240
 241         mode = hapd->iface->current_mode;
 242         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 243                 chan_spacing = 4;
 244
 245         start = prev = NULL;
 246         for (i = 0; i < mode->num_channels; i++) {
 247                 struct hostapd_channel_data *chan = &mode->channels[i];
 248                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 249                         continue;
 250                 if (start && prev &&
 251                     prev->chan + chan_spacing == chan->chan &&
 252                     start->max_tx_power == chan->max_tx_power) {
 253                         prev = chan;
 254                         continue; /* can use same entry */
 255                 }
 256
 257                 if (start && prev) {
 258                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 259                                                       start, prev);
 260                         start = NULL;
 261                 }
 262
 263                 /* Start new group */
 264                 start = prev = chan;
 265         }
 266
 267         if (start) {
 268                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 269                                               start, prev);
 270         }
 271
 272         if ((pos - eid) & 1) {
 273                 if (end - pos < 1)
 274                         return eid;
 275                 *pos++ = 0; /* pad for 16-bit alignment */
 276         }
 277
 278         eid[1] = (pos - eid) - 2;
 279
 280         return pos;
 281 }
 282
 283
 284 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 285 {
 286         const u8 *ie;
 287         size_t ielen;
 288
 289         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 290         if (ie == NULL || ielen > len)
 291                 return eid;
 292
 293         os_memcpy(eid, ie, ielen);
 294         return eid + ielen;
 295 }
 296
 297
 298 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 299 {
 300         if (!hapd->cs_freq_params.channel)
 301                 return eid;
 302
 303         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 304         *eid++ = 3;
 305         *eid++ = hapd->cs_block_tx;
 306         *eid++ = hapd->cs_freq_params.channel;
 307         *eid++ = hapd->cs_count;
 308
 309         return eid;
 310 }
 311
 312
 313 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 314 {
 315         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 316                 return eid;
 317
 318         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 319         *eid++ = 4;
 320         *eid++ = hapd->cs_block_tx;
 321         *eid++ = hapd->iface->cs_oper_class;
 322         *eid++ = hapd->cs_freq_params.channel;
 323         *eid++ = hapd->cs_count;
 324
 325         return eid;
 326 }
 327
 328
 329 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
 330 {
 331         u8 op_class, channel;
 332
 333         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
 334             !hapd->iface->freq)
 335                 return eid;
 336
 337         if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
 338                                           hapd->iconf->secondary_channel,
 339                                           hapd->iconf->vht_oper_chwidth,
 340                                           &op_class, &channel) ==
 341             NUM_HOSTAPD_MODES)
 342                 return eid;
 343
 344         *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
 345         *eid++ = 2;
 346
 347         /* Current Operating Class */
 348         *eid++ = op_class;
 349
 350         /* TODO: Advertise all the supported operating classes */
 351         *eid++ = 0;
 352
 353         return eid;
 354 }
 355
 356
 357 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 358                                    const struct ieee80211_mgmt *req,
 359                                    int is_p2p, size_t *resp_len)
 360 {
 361         struct ieee80211_mgmt *resp;
 362         u8 *pos, *epos, *csa_pos;
 363         size_t buflen;
 364
 365 #define MAX_PROBERESP_LEN 768
 366         buflen = MAX_PROBERESP_LEN;
 367 #ifdef CONFIG_WPS
 368         if (hapd->wps_probe_resp_ie)
 369                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 370 #endif /* CONFIG_WPS */
 371 #ifdef CONFIG_P2P
 372         if (hapd->p2p_probe_resp_ie)
 373                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 374 #endif /* CONFIG_P2P */
 375 #ifdef CONFIG_FST
 376         if (hapd->iface->fst_ies)
 377                 buflen += wpabuf_len(hapd->iface->fst_ies);
 378 #endif /* CONFIG_FST */
 379         if (hapd->conf->vendor_elements)
 380                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 381         if (hapd->conf->vendor_vht) {
 382                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 383                         2 + sizeof(struct ieee80211_vht_operation);
 384         }
 385         resp = os_zalloc(buflen);
 386         if (resp == NULL)
 387                 return NULL;
 388
 389         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 390
 391         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 392                                            WLAN_FC_STYPE_PROBE_RESP);
 393         if (req)
 394                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 395         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 396
 397         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 398         resp->u.probe_resp.beacon_int =
 399                 host_to_le16(hapd->iconf->beacon_int);
 400
 401         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 402         resp->u.probe_resp.capab_info =
 403                 host_to_le16(hostapd_own_capab_info(hapd));
 404
 405         pos = resp->u.probe_resp.variable;
 406         *pos++ = WLAN_EID_SSID;
 407         *pos++ = hapd->conf->ssid.ssid_len;
 408         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 409         pos += hapd->conf->ssid.ssid_len;
 410
 411         /* Supported rates */
 412         pos = hostapd_eid_supp_rates(hapd, pos);
 413
 414         /* DS Params */
 415         pos = hostapd_eid_ds_params(hapd, pos);
 416
 417         pos = hostapd_eid_country(hapd, pos, epos - pos);
 418
 419         /* Power Constraint element */
 420         pos = hostapd_eid_pwr_constraint(hapd, pos);
 421
 422         /* CSA IE */
 423         csa_pos = hostapd_eid_csa(hapd, pos);
 424         if (csa_pos != pos)
 425                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 426         pos = csa_pos;
 427
 428         /* ERP Information element */
 429         pos = hostapd_eid_erp_info(hapd, pos);
 430
 431         /* Extended supported rates */
 432         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 433
 434         /* RSN, MDIE, WPA */
 435         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 436
 437         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 438
 439         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 440
 441         /* eCSA IE */
 442         csa_pos = hostapd_eid_ecsa(hapd, pos);
 443         if (csa_pos != pos)
 444                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 445         pos = csa_pos;
 446
 447         pos = hostapd_eid_supported_op_classes(hapd, pos);
 448
 449 #ifdef CONFIG_IEEE80211N
 450         /* Secondary Channel Offset element */
 451         /* TODO: The standard doesn't specify a position for this element. */
 452         pos = hostapd_eid_secondary_channel(hapd, pos);
 453
 454         pos = hostapd_eid_ht_capabilities(hapd, pos);
 455         pos = hostapd_eid_ht_operation(hapd, pos);
 456 #endif /* CONFIG_IEEE80211N */
 457
 458         pos = hostapd_eid_ext_capab(hapd, pos);
 459
 460         pos = hostapd_eid_time_adv(hapd, pos);
 461         pos = hostapd_eid_time_zone(hapd, pos);
 462
 463         pos = hostapd_eid_interworking(hapd, pos);
 464         pos = hostapd_eid_adv_proto(hapd, pos);
 465         pos = hostapd_eid_roaming_consortium(hapd, pos);
 466
 467 #ifdef CONFIG_FST
 468         if (hapd->iface->fst_ies) {
 469                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 470                           wpabuf_len(hapd->iface->fst_ies));
 471                 pos += wpabuf_len(hapd->iface->fst_ies);
 472         }
 473 #endif /* CONFIG_FST */
 474
 475 #ifdef CONFIG_IEEE80211AC
 476         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 477                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 478                 pos = hostapd_eid_vht_operation(hapd, pos);
 479                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 480         }
 481         if (hapd->conf->vendor_vht)
 482                 pos = hostapd_eid_vendor_vht(hapd, pos);
 483 #endif /* CONFIG_IEEE80211AC */
 484
 485         /* Wi-Fi Alliance WMM */
 486         pos = hostapd_eid_wmm(hapd, pos);
 487
 488 #ifdef CONFIG_WPS
 489         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 490                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 491                           wpabuf_len(hapd->wps_probe_resp_ie));
 492                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 493         }
 494 #endif /* CONFIG_WPS */
 495
 496 #ifdef CONFIG_P2P
 497         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 498             hapd->p2p_probe_resp_ie) {
 499                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 500                           wpabuf_len(hapd->p2p_probe_resp_ie));
 501                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 502         }
 503 #endif /* CONFIG_P2P */
 504 #ifdef CONFIG_P2P_MANAGER
 505         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 506             P2P_MANAGE)
 507                 pos = hostapd_eid_p2p_manage(hapd, pos);
 508 #endif /* CONFIG_P2P_MANAGER */
 509
 510 #ifdef CONFIG_HS20
 511         pos = hostapd_eid_hs20_indication(hapd, pos);
 512         pos = hostapd_eid_osen(hapd, pos);
 513 #endif /* CONFIG_HS20 */
 514
 515         if (hapd->conf->vendor_elements) {
 516                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 517                           wpabuf_len(hapd->conf->vendor_elements));
 518                 pos += wpabuf_len(hapd->conf->vendor_elements);
 519         }
 520
 521         *resp_len = pos - (u8 *) resp;
 522         return (u8 *) resp;
 523 }
 524
 525
 526 enum ssid_match_result {
 527         NO_SSID_MATCH,
 528         EXACT_SSID_MATCH,
 529         WILDCARD_SSID_MATCH
 530 };
 531
 532 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 533                                          const u8 *ssid, size_t ssid_len,
 534                                          const u8 *ssid_list,
 535                                          size_t ssid_list_len)
 536 {
 537         const u8 *pos, *end;
 538         int wildcard = 0;
 539
 540         if (ssid_len == 0)
 541                 wildcard = 1;
 542         if (ssid_len == hapd->conf->ssid.ssid_len &&
 543             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 544                 return EXACT_SSID_MATCH;
 545
 546         if (ssid_list == NULL)
 547                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 548
 549         pos = ssid_list;
 550         end = ssid_list + ssid_list_len;
 551         while (pos + 1 <= end) {
 552                 if (pos + 2 + pos[1] > end)
 553                         break;
 554                 if (pos[1] == 0)
 555                         wildcard = 1;
 556                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 557                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 558                         return EXACT_SSID_MATCH;
 559                 pos += 2 + pos[1];
 560         }
 561
 562         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 563 }
 564
 565
 566 void sta_track_expire(struct hostapd_iface *iface, int force)
 567 {
 568         struct os_reltime now;
 569         struct hostapd_sta_info *info;
 570
 571         if (!iface->num_sta_seen)
 572                 return;
 573
 574         os_get_reltime(&now);
 575         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 576                                      list))) {
 577                 if (!force &&
 578                     !os_reltime_expired(&now, &info->last_seen,
 579                                         iface->conf->track_sta_max_age))
 580                         break;
 581                 force = 0;
 582
 583                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 584                            MACSTR, iface->bss[0]->conf->iface,
 585                            MAC2STR(info->addr));
 586                 dl_list_del(&info->list);
 587                 iface->num_sta_seen--;
 588                 os_free(info);
 589         }
 590 }
 591
 592
 593 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 594                                                const u8 *addr)
 595 {
 596         struct hostapd_sta_info *info;
 597
 598         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 599                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 600                         return info;
 601
 602         return NULL;
 603 }
 604
 605
 606 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 607 {
 608         struct hostapd_sta_info *info;
 609
 610         info = sta_track_get(iface, addr);
 611         if (info) {
 612                 /* Move the most recent entry to the end of the list */
 613                 dl_list_del(&info->list);
 614                 dl_list_add_tail(&iface->sta_seen, &info->list);
 615                 os_get_reltime(&info->last_seen);
 616                 return;
 617         }
 618
 619         /* Add a new entry */
 620         info = os_zalloc(sizeof(*info));
 621         os_memcpy(info->addr, addr, ETH_ALEN);
 622         os_get_reltime(&info->last_seen);
 623
 624         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 625                 /* Expire oldest entry to make room for a new one */
 626                 sta_track_expire(iface, 1);
 627         }
 628
 629         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 630                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 631         dl_list_add_tail(&iface->sta_seen, &info->list);
 632         iface->num_sta_seen++;
 633 }
 634
 635
 636 struct hostapd_data *
 637 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 638                   const char *ifname)
 639 {
 640         struct hapd_interfaces *interfaces = iface->interfaces;
 641         size_t i, j;
 642
 643         for (i = 0; i < interfaces->count; i++) {
 644                 struct hostapd_data *hapd = NULL;
 645
 646                 iface = interfaces->iface[i];
 647                 for (j = 0; j < iface->num_bss; j++) {
 648                         hapd = iface->bss[j];
 649                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 650                                 break;
 651                         hapd = NULL;
 652                 }
 653
 654                 if (hapd && sta_track_get(iface, addr))
 655                         return hapd;
 656         }
 657
 658         return NULL;
 659 }
 660
 661
 662 void handle_probe_req(struct hostapd_data *hapd,
 663                       const struct ieee80211_mgmt *mgmt, size_t len,
 664                       int ssi_signal)
 665 {
 666         u8 *resp;
 667         struct ieee802_11_elems elems;
 668         const u8 *ie;
 669         size_t ie_len;
 670         size_t i, resp_len;
 671         int noack;
 672         enum ssid_match_result res;
 673
 674         ie = mgmt->u.probe_req.variable;
 675         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 676                 return;
 677         if (hapd->iconf->track_sta_max_num)
 678                 sta_track_add(hapd->iface, mgmt->sa);
 679         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 680
 681         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 682                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 683                                             mgmt->sa, mgmt->da, mgmt->bssid,
 684                                             ie, ie_len, ssi_signal) > 0)
 685                         return;
 686
 687         if (!hapd->iconf->send_probe_response)
 688                 return;
 689
 690         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 691                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 692                            MAC2STR(mgmt->sa));
 693                 return;
 694         }
 695
 696         if ((!elems.ssid || !elems.supp_rates)) {
 697                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 698                            "without SSID or supported rates element",
 699                            MAC2STR(mgmt->sa));
 700                 return;
 701         }
 702
 703         /*
 704          * No need to reply if the Probe Request frame was sent on an adjacent
 705          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 706          * AP with dot11RadioMeasurementActivated set to true, but strictly
 707          * speaking does not allow such ignoring of Probe Request frames if
 708          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 709          * number of unnecessary Probe Response frames for cases where the STA
 710          * is less likely to see them (Probe Request frame sent on a
 711          * neighboring, but partially overlapping, channel).
 712          */
 713         if (elems.ds_params &&
 714             hapd->iface->current_mode &&
 715             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 716              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 717             hapd->iconf->channel != elems.ds_params[0]) {
 718                 wpa_printf(MSG_DEBUG,
 719                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 720                            hapd->iconf->channel, elems.ds_params[0]);
 721                 return;
 722         }
 723
 724 #ifdef CONFIG_P2P
 725         if (hapd->p2p && elems.wps_ie) {
 726                 struct wpabuf *wps;
 727                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 728                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 729                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 730                                    "due to mismatch with Requested Device "
 731                                    "Type");
 732                         wpabuf_free(wps);
 733                         return;
 734                 }
 735                 wpabuf_free(wps);
 736         }
 737
 738         if (hapd->p2p && elems.p2p) {
 739                 struct wpabuf *p2p;
 740                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 741                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 742                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 743                                    "due to mismatch with Device ID");
 744                         wpabuf_free(p2p);
 745                         return;
 746                 }
 747                 wpabuf_free(p2p);
 748         }
 749 #endif /* CONFIG_P2P */
 750
 751         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 752             elems.ssid_list_len == 0) {
 753                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 754                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 755                 return;
 756         }
 757
 758 #ifdef CONFIG_P2P
 759         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 760             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 761             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 762                       P2P_WILDCARD_SSID_LEN) == 0) {
 763                 /* Process P2P Wildcard SSID like Wildcard SSID */
 764                 elems.ssid_len = 0;
 765         }
 766 #endif /* CONFIG_P2P */
 767
 768         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 769                          elems.ssid_list, elems.ssid_list_len);
 770         if (res == NO_SSID_MATCH) {
 771                 if (!(mgmt->da[0] & 0x01)) {
 772                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 773                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 774                                    MAC2STR(mgmt->sa),
 775                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 776                                    MAC2STR(mgmt->da),
 777                                    elems.ssid_list ? " (SSID list)" : "");
 778                 }
 779                 return;
 780         }
 781
 782 #ifdef CONFIG_INTERWORKING
 783         if (hapd->conf->interworking &&
 784             elems.interworking && elems.interworking_len >= 1) {
 785                 u8 ant = elems.interworking[0] & 0x0f;
 786                 if (ant != INTERWORKING_ANT_WILDCARD &&
 787                     ant != hapd->conf->access_network_type) {
 788                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 789                                    " for mismatching ANT %u ignored",
 790                                    MAC2STR(mgmt->sa), ant);
 791                         return;
 792                 }
 793         }
 794
 795         if (hapd->conf->interworking && elems.interworking &&
 796             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 797                 const u8 *hessid;
 798                 if (elems.interworking_len == 7)
 799                         hessid = elems.interworking + 1;
 800                 else
 801                         hessid = elems.interworking + 1 + 2;
 802                 if (!is_broadcast_ether_addr(hessid) &&
 803                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 804                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 805                                    " for mismatching HESSID " MACSTR
 806                                    " ignored",
 807                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 808                         return;
 809                 }
 810         }
 811 #endif /* CONFIG_INTERWORKING */
 812
 813 #ifdef CONFIG_P2P
 814         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 815             supp_rates_11b_only(&elems)) {
 816                 /* Indicates support for 11b rates only */
 817                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 818                            MACSTR " with only 802.11b rates",
 819                            MAC2STR(mgmt->sa));
 820                 return;
 821         }
 822 #endif /* CONFIG_P2P */
 823
 824         /* TODO: verify that supp_rates contains at least one matching rate
 825          * with AP configuration */
 826
 827         if (hapd->conf->no_probe_resp_if_seen_on &&
 828             is_multicast_ether_addr(mgmt->da) &&
 829             is_multicast_ether_addr(mgmt->bssid) &&
 830             sta_track_seen_on(hapd->iface, mgmt->sa,
 831                               hapd->conf->no_probe_resp_if_seen_on)) {
 832                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 833                            " since STA has been seen on %s",
 834                            hapd->conf->iface, MAC2STR(mgmt->sa),
 835                            hapd->conf->no_probe_resp_if_seen_on);
 836                 return;
 837         }
 838
 839 #ifdef CONFIG_TESTING_OPTIONS
 840         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 841             drand48() < hapd->iconf->ignore_probe_probability) {
 842                 wpa_printf(MSG_INFO,
 843                            "TESTING: ignoring probe request from " MACSTR,
 844                            MAC2STR(mgmt->sa));
 845                 return;
 846         }
 847 #endif /* CONFIG_TESTING_OPTIONS */
 848
 849         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 850                                       &resp_len);
 851         if (resp == NULL)
 852                 return;
 853
 854         /*
 855          * If this is a broadcast probe request, apply no ack policy to avoid
 856          * excessive retries.
 857          */
 858         noack = !!(res == WILDCARD_SSID_MATCH &&
 859                    is_broadcast_ether_addr(mgmt->da));
 860
 861         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 862                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 863
 864         os_free(resp);
 865
 866         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 867                    "SSID", MAC2STR(mgmt->sa),
 868                    elems.ssid_len == 0 ? "broadcast" : "our");
 869 }
 870
 871
 872 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 873                                         size_t *resp_len)
 874 {
 875         /* check probe response offloading caps and print warnings */
 876         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 877                 return NULL;
 878
 879 #ifdef CONFIG_WPS
 880         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 881             (!(hapd->iface->probe_resp_offloads &
 882                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 883                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 884                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 885                            "Probe Response while not supporting this");
 886 #endif /* CONFIG_WPS */
 887
 888 #ifdef CONFIG_P2P
 889         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 890             !(hapd->iface->probe_resp_offloads &
 891               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 892                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 893                            "Probe Response while not supporting this");
 894 #endif  /* CONFIG_P2P */
 895
 896         if (hapd->conf->interworking &&
 897             !(hapd->iface->probe_resp_offloads &
 898               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 899                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 900                            "Interworking Probe Response while not supporting "
 901                            "this");
 902
 903         /* Generate a Probe Response template for the non-P2P case */
 904         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 905 }
 906
 907 #endif /* NEED_AP_MLME */
 908
 909
 910 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 911                                struct wpa_driver_ap_params *params)
 912 {
 913         struct ieee80211_mgmt *head = NULL;
 914         u8 *tail = NULL;
 915         size_t head_len = 0, tail_len = 0;
 916         u8 *resp = NULL;
 917         size_t resp_len = 0;
 918 #ifdef NEED_AP_MLME
 919         u16 capab_info;
 920         u8 *pos, *tailpos, *csa_pos;
 921
 922 #define BEACON_HEAD_BUF_SIZE 256
 923 #define BEACON_TAIL_BUF_SIZE 512
 924         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 925         tail_len = BEACON_TAIL_BUF_SIZE;
 926 #ifdef CONFIG_WPS
 927         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 928                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 929 #endif /* CONFIG_WPS */
 930 #ifdef CONFIG_P2P
 931         if (hapd->p2p_beacon_ie)
 932                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 933 #endif /* CONFIG_P2P */
 934 #ifdef CONFIG_FST
 935         if (hapd->iface->fst_ies)
 936                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 937 #endif /* CONFIG_FST */
 938         if (hapd->conf->vendor_elements)
 939                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 940
 941 #ifdef CONFIG_IEEE80211AC
 942         if (hapd->conf->vendor_vht) {
 943                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 944                         2 + sizeof(struct ieee80211_vht_operation);
 945         }
 946 #endif /* CONFIG_IEEE80211AC */
 947
 948         tailpos = tail = os_malloc(tail_len);
 949         if (head == NULL || tail == NULL) {
 950                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 951                 os_free(head);
 952                 os_free(tail);
 953                 return -1;
 954         }
 955
 956         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 957                                            WLAN_FC_STYPE_BEACON);
 958         head->duration = host_to_le16(0);
 959         os_memset(head->da, 0xff, ETH_ALEN);
 960
 961         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 962         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 963         head->u.beacon.beacon_int =
 964                 host_to_le16(hapd->iconf->beacon_int);
 965
 966         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 967         capab_info = hostapd_own_capab_info(hapd);
 968         head->u.beacon.capab_info = host_to_le16(capab_info);
 969         pos = &head->u.beacon.variable[0];
 970
 971         /* SSID */
 972         *pos++ = WLAN_EID_SSID;
 973         if (hapd->conf->ignore_broadcast_ssid == 2) {
 974                 /* clear the data, but keep the correct length of the SSID */
 975                 *pos++ = hapd->conf->ssid.ssid_len;
 976                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 977                 pos += hapd->conf->ssid.ssid_len;
 978         } else if (hapd->conf->ignore_broadcast_ssid) {
 979                 *pos++ = 0; /* empty SSID */
 980         } else {
 981                 *pos++ = hapd->conf->ssid.ssid_len;
 982                 os_memcpy(pos, hapd->conf->ssid.ssid,
 983                           hapd->conf->ssid.ssid_len);
 984                 pos += hapd->conf->ssid.ssid_len;
 985         }
 986
 987         /* Supported rates */
 988         pos = hostapd_eid_supp_rates(hapd, pos);
 989
 990         /* DS Params */
 991         pos = hostapd_eid_ds_params(hapd, pos);
 992
 993         head_len = pos - (u8 *) head;
 994
 995         tailpos = hostapd_eid_country(hapd, tailpos,
 996                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 997
 998         /* Power Constraint element */
 999         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1000
1001         /* CSA IE */
1002         csa_pos = hostapd_eid_csa(hapd, tailpos);
1003         if (csa_pos != tailpos)
1004                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1005         tailpos = csa_pos;
1006
1007         /* ERP Information element */
1008         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1009
1010         /* Extended supported rates */
1011         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1012
1013         /* RSN, MDIE, WPA */
1014         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1015                                   tailpos);
1016
1017         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1018                                                tail + BEACON_TAIL_BUF_SIZE -
1019                                                tailpos);
1020
1021         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1022                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1023
1024         /* eCSA IE */
1025         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1026         if (csa_pos != tailpos)
1027                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1028         tailpos = csa_pos;
1029
1030         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1031
1032 #ifdef CONFIG_IEEE80211N
1033         /* Secondary Channel Offset element */
1034         /* TODO: The standard doesn't specify a position for this element. */
1035         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1036
1037         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1038         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1039 #endif /* CONFIG_IEEE80211N */
1040
1041         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1042
1043         /*
1044          * TODO: Time Advertisement element should only be included in some
1045          * DTIM Beacon frames.
1046          */
1047         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1048
1049         tailpos = hostapd_eid_interworking(hapd, tailpos);
1050         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1051         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1052
1053 #ifdef CONFIG_FST
1054         if (hapd->iface->fst_ies) {
1055                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1056                           wpabuf_len(hapd->iface->fst_ies));
1057                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1058         }
1059 #endif /* CONFIG_FST */
1060
1061 #ifdef CONFIG_IEEE80211AC
1062         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1063                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1064                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1065                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1066         }
1067         if (hapd->conf->vendor_vht)
1068                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1069 #endif /* CONFIG_IEEE80211AC */
1070
1071         /* Wi-Fi Alliance WMM */
1072         tailpos = hostapd_eid_wmm(hapd, tailpos);
1073
1074 #ifdef CONFIG_WPS
1075         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1076                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1077                           wpabuf_len(hapd->wps_beacon_ie));
1078                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1079         }
1080 #endif /* CONFIG_WPS */
1081
1082 #ifdef CONFIG_P2P
1083         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1084                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1085                           wpabuf_len(hapd->p2p_beacon_ie));
1086                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1087         }
1088 #endif /* CONFIG_P2P */
1089 #ifdef CONFIG_P2P_MANAGER
1090         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1091             P2P_MANAGE)
1092                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1093 #endif /* CONFIG_P2P_MANAGER */
1094
1095 #ifdef CONFIG_HS20
1096         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1097         tailpos = hostapd_eid_osen(hapd, tailpos);
1098 #endif /* CONFIG_HS20 */
1099
1100         if (hapd->conf->vendor_elements) {
1101                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1102                           wpabuf_len(hapd->conf->vendor_elements));
1103                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1104         }
1105
1106         tail_len = tailpos > tail ? tailpos - tail : 0;
1107
1108         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1109 #endif /* NEED_AP_MLME */
1110
1111         os_memset(params, 0, sizeof(*params));
1112         params->head = (u8 *) head;
1113         params->head_len = head_len;
1114         params->tail = tail;
1115         params->tail_len = tail_len;
1116         params->proberesp = resp;
1117         params->proberesp_len = resp_len;
1118         params->dtim_period = hapd->conf->dtim_period;
1119         params->beacon_int = hapd->iconf->beacon_int;
1120         params->basic_rates = hapd->iface->basic_rates;
1121         params->ssid = hapd->conf->ssid.ssid;
1122         params->ssid_len = hapd->conf->ssid.ssid_len;
1123         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1124             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1125                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1126                         hapd->conf->rsn_pairwise;
1127         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1128                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1129         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1130                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1131         params->group_cipher = hapd->conf->wpa_group;
1132         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1133         params->auth_algs = hapd->conf->auth_algs;
1134         params->wpa_version = hapd->conf->wpa;
1135         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1136                 (hapd->conf->ieee802_1x &&
1137                  (hapd->conf->default_wep_key_len ||
1138                   hapd->conf->individual_wep_key_len));
1139         switch (hapd->conf->ignore_broadcast_ssid) {
1140         case 0:
1141                 params->hide_ssid = NO_SSID_HIDING;
1142                 break;
1143         case 1:
1144                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1145                 break;
1146         case 2:
1147                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1148                 break;
1149         }
1150         params->isolate = hapd->conf->isolate;
1151         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1152 #ifdef NEED_AP_MLME
1153         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1154                                 ERP_INFO_USE_PROTECTION);
1155         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1156                 hapd->iconf->preamble == SHORT_PREAMBLE;
1157         if (hapd->iface->current_mode &&
1158             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1159                 params->short_slot_time =
1160                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1161         else
1162                 params->short_slot_time = -1;
1163         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1164                 params->ht_opmode = -1;
1165         else
1166                 params->ht_opmode = hapd->iface->ht_op_mode;
1167 #endif /* NEED_AP_MLME */
1168         params->interworking = hapd->conf->interworking;
1169         if (hapd->conf->interworking &&
1170             !is_zero_ether_addr(hapd->conf->hessid))
1171                 params->hessid = hapd->conf->hessid;
1172         params->access_network_type = hapd->conf->access_network_type;
1173         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1174 #ifdef CONFIG_P2P
1175         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1176 #endif /* CONFIG_P2P */
1177 #ifdef CONFIG_HS20
1178         params->disable_dgaf = hapd->conf->disable_dgaf;
1179         if (hapd->conf->osen) {
1180                 params->privacy = 1;
1181                 params->osen = 1;
1182         }
1183 #endif /* CONFIG_HS20 */
1184         return 0;
1185 }
1186
1187
1188 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1189 {
1190         os_free(params->tail);
1191         params->tail = NULL;
1192         os_free(params->head);
1193         params->head = NULL;
1194         os_free(params->proberesp);
1195         params->proberesp = NULL;
1196 }
1197
1198
1199 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1200 {
1201         struct wpa_driver_ap_params params;
1202         struct hostapd_freq_params freq;
1203         struct hostapd_iface *iface = hapd->iface;
1204         struct hostapd_config *iconf = iface->conf;
1205         struct wpabuf *beacon, *proberesp, *assocresp;
1206         int res, ret = -1;
1207
1208         if (hapd->csa_in_progress) {
1209                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1210                 return -1;
1211         }
1212
1213         hapd->beacon_set_done = 1;
1214
1215         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1216                 return -1;
1217
1218         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1219             0)
1220                 goto fail;
1221
1222         params.beacon_ies = beacon;
1223         params.proberesp_ies = proberesp;
1224         params.assocresp_ies = assocresp;
1225         params.reenable = hapd->reenable_beacon;
1226         hapd->reenable_beacon = 0;
1227
1228         if (iface->current_mode &&
1229             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1230                                     iconf->channel, iconf->ieee80211n,
1231                                     iconf->ieee80211ac,
1232                                     iconf->secondary_channel,
1233                                     iconf->vht_oper_chwidth,
1234                                     iconf->vht_oper_centr_freq_seg0_idx,
1235                                     iconf->vht_oper_centr_freq_seg1_idx,
1236                                     iface->current_mode->vht_capab) == 0)
1237                 params.freq = &freq;
1238
1239         res = hostapd_drv_set_ap(hapd, &params);
1240         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1241         if (res)
1242                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1243         else
1244                 ret = 0;
1245 fail:
1246         ieee802_11_free_ap_params(&params);
1247         return ret;
1248 }
1249
1250
1251 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1252 {
1253         size_t i;
1254         int ret = 0;
1255
1256         for (i = 0; i < iface->num_bss; i++) {
1257                 if (iface->bss[i]->started &&
1258                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1259                         ret = -1;
1260         }
1261
1262         return ret;
1263 }
1264
1265
1266 /* only update beacons if started */
1267 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1268 {
1269         size_t i;
1270         int ret = 0;
1271
1272         for (i = 0; i < iface->num_bss; i++) {
1273                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1274                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1275                         ret = -1;
1276         }
1277
1278         return ret;
1279 }
1280
1281 #endif /* CONFIG_NATIVE_WINDOWS */