src/ap/beacon.c

   1 /*
   2  * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
   3  * Copyright (c) 2002-2004, Instant802 Networks, Inc.
   4  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   5  * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
   6  *
   7  * This software may be distributed under the terms of the BSD license.
   8  * See README for more details.
   9  */
  10
  11 #include "utils/includes.h"
  12
  13 #ifndef CONFIG_NATIVE_WINDOWS
  14
  15 #include "utils/common.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "common/ieee802_11_common.h"
  18 #include "common/hw_features_common.h"
  19 #include "wps/wps_defs.h"
  20 #include "p2p/p2p.h"
  21 #include "hostapd.h"
  22 #include "ieee802_11.h"
  23 #include "wpa_auth.h"
  24 #include "wmm.h"
  25 #include "ap_config.h"
  26 #include "sta_info.h"
  27 #include "p2p_hostapd.h"
  28 #include "ap_drv_ops.h"
  29 #include "beacon.h"
  30 #include "hs20.h"
  31 #include "dfs.h"
  32
  33
  34 #ifdef NEED_AP_MLME
  35
  36 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
  37                                          size_t len)
  38 {
  39         if (!hapd->conf->radio_measurements || len < 2 + 4)
  40                 return eid;
  41
  42         *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
  43         *eid++ = 5;
  44         *eid++ = (hapd->conf->radio_measurements & BIT(0)) ?
  45                 WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00;
  46         *eid++ = 0x00;
  47         *eid++ = 0x00;
  48         *eid++ = 0x00;
  49         *eid++ = 0x00;
  50         return eid;
  51 }
  52
  53
  54 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
  55 {
  56         if (len < 2 + 5)
  57                 return eid;
  58
  59 #ifdef CONFIG_TESTING_OPTIONS
  60         if (hapd->conf->bss_load_test_set) {
  61                 *eid++ = WLAN_EID_BSS_LOAD;
  62                 *eid++ = 5;
  63                 os_memcpy(eid, hapd->conf->bss_load_test, 5);
  64                 eid += 5;
  65                 return eid;
  66         }
  67 #endif /* CONFIG_TESTING_OPTIONS */
  68         if (hapd->conf->bss_load_update_period) {
  69                 *eid++ = WLAN_EID_BSS_LOAD;
  70                 *eid++ = 5;
  71                 WPA_PUT_LE16(eid, hapd->num_sta);
  72                 eid += 2;
  73                 *eid++ = hapd->iface->channel_utilization;
  74                 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
  75                 eid += 2;
  76         }
  77         return eid;
  78 }
  79
  80
  81 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  82 {
  83         u8 erp = 0;
  84
  85         if (hapd->iface->current_mode == NULL ||
  86             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  87                 return 0;
  88
  89         if (hapd->iface->olbc)
  90                 erp |= ERP_INFO_USE_PROTECTION;
  91         if (hapd->iface->num_sta_non_erp > 0) {
  92                 erp |= ERP_INFO_NON_ERP_PRESENT |
  93                         ERP_INFO_USE_PROTECTION;
  94         }
  95         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  96             hapd->iconf->preamble == LONG_PREAMBLE)
  97                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  98
  99         return erp;
 100 }
 101
 102
 103 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
 104 {
 105         *eid++ = WLAN_EID_DS_PARAMS;
 106         *eid++ = 1;
 107         *eid++ = hapd->iconf->channel;
 108         return eid;
 109 }
 110
 111
 112 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 113 {
 114         if (hapd->iface->current_mode == NULL ||
 115             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 116                 return eid;
 117
 118         /* Set NonERP_present and use_protection bits if there
 119          * are any associated NonERP stations. */
 120         /* TODO: use_protection bit can be set to zero even if
 121          * there are NonERP stations present. This optimization
 122          * might be useful if NonERP stations are "quiet".
 123          * See 802.11g/D6 E-1 for recommended practice.
 124          * In addition, Non ERP present might be set, if AP detects Non ERP
 125          * operation on other APs. */
 126
 127         /* Add ERP Information element */
 128         *eid++ = WLAN_EID_ERP_INFO;
 129         *eid++ = 1;
 130         *eid++ = ieee802_11_erp_info(hapd);
 131
 132         return eid;
 133 }
 134
 135
 136 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
 137 {
 138         u8 *pos = eid;
 139         u8 local_pwr_constraint = 0;
 140         int dfs;
 141
 142         if (hapd->iface->current_mode == NULL ||
 143             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
 144                 return eid;
 145
 146         /* Let host drivers add this IE if DFS support is offloaded */
 147         if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
 148                 return eid;
 149
 150         /*
 151          * There is no DFS support and power constraint was not directly
 152          * requested by config option.
 153          */
 154         if (!hapd->iconf->ieee80211h &&
 155             hapd->iconf->local_pwr_constraint == -1)
 156                 return eid;
 157
 158         /* Check if DFS is required by regulatory. */
 159         dfs = hostapd_is_dfs_required(hapd->iface);
 160         if (dfs < 0) {
 161                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 162                            dfs);
 163                 dfs = 0;
 164         }
 165
 166         if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
 167                 return eid;
 168
 169         /*
 170          * ieee80211h (DFS) is enabled so Power Constraint element shall
 171          * be added when running on DFS channel whenever local_pwr_constraint
 172          * is configured or not. In order to meet regulations when TPC is not
 173          * implemented using a transmit power that is below the legal maximum
 174          * (including any mitigation factor) should help. In this case,
 175          * indicate 3 dB below maximum allowed transmit power.
 176          */
 177         if (hapd->iconf->local_pwr_constraint == -1)
 178                 local_pwr_constraint = 3;
 179
 180         /*
 181          * A STA that is not an AP shall use a transmit power less than or
 182          * equal to the local maximum transmit power level for the channel.
 183          * The local maximum transmit power can be calculated from the formula:
 184          * local max TX pwr = max TX pwr - local pwr constraint
 185          * Where max TX pwr is maximum transmit power level specified for
 186          * channel in Country element and local pwr constraint is specified
 187          * for channel in this Power Constraint element.
 188          */
 189
 190         /* Element ID */
 191         *pos++ = WLAN_EID_PWR_CONSTRAINT;
 192         /* Length */
 193         *pos++ = 1;
 194         /* Local Power Constraint */
 195         if (local_pwr_constraint)
 196                 *pos++ = local_pwr_constraint;
 197         else
 198                 *pos++ = hapd->iconf->local_pwr_constraint;
 199
 200         return pos;
 201 }
 202
 203
 204 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 205                                     struct hostapd_channel_data *start,
 206                                     struct hostapd_channel_data *prev)
 207 {
 208         if (end - pos < 3)
 209                 return pos;
 210
 211         /* first channel number */
 212         *pos++ = start->chan;
 213         /* number of channels */
 214         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 215         /* maximum transmit power level */
 216         *pos++ = start->max_tx_power;
 217
 218         return pos;
 219 }
 220
 221
 222 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 223                                 int max_len)
 224 {
 225         u8 *pos = eid;
 226         u8 *end = eid + max_len;
 227         int i;
 228         struct hostapd_hw_modes *mode;
 229         struct hostapd_channel_data *start, *prev;
 230         int chan_spacing = 1;
 231
 232         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 233             hapd->iface->current_mode == NULL)
 234                 return eid;
 235
 236         *pos++ = WLAN_EID_COUNTRY;
 237         pos++; /* length will be set later */
 238         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 239         pos += 3;
 240
 241         mode = hapd->iface->current_mode;
 242         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 243                 chan_spacing = 4;
 244
 245         start = prev = NULL;
 246         for (i = 0; i < mode->num_channels; i++) {
 247                 struct hostapd_channel_data *chan = &mode->channels[i];
 248                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 249                         continue;
 250                 if (start && prev &&
 251                     prev->chan + chan_spacing == chan->chan &&
 252                     start->max_tx_power == chan->max_tx_power) {
 253                         prev = chan;
 254                         continue; /* can use same entry */
 255                 }
 256
 257                 if (start && prev) {
 258                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 259                                                       start, prev);
 260                         start = NULL;
 261                 }
 262
 263                 /* Start new group */
 264                 start = prev = chan;
 265         }
 266
 267         if (start) {
 268                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 269                                               start, prev);
 270         }
 271
 272         if ((pos - eid) & 1) {
 273                 if (end - pos < 1)
 274                         return eid;
 275                 *pos++ = 0; /* pad for 16-bit alignment */
 276         }
 277
 278         eid[1] = (pos - eid) - 2;
 279
 280         return pos;
 281 }
 282
 283
 284 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 285 {
 286         const u8 *ie;
 287         size_t ielen;
 288
 289         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 290         if (ie == NULL || ielen > len)
 291                 return eid;
 292
 293         os_memcpy(eid, ie, ielen);
 294         return eid + ielen;
 295 }
 296
 297
 298 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 299 {
 300 #ifdef CONFIG_TESTING_OPTIONS
 301         if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
 302                 return eid;
 303 #endif /* CONFIG_TESTING_OPTIONS */
 304
 305         if (!hapd->cs_freq_params.channel)
 306                 return eid;
 307
 308         *eid++ = WLAN_EID_CHANNEL_SWITCH;
 309         *eid++ = 3;
 310         *eid++ = hapd->cs_block_tx;
 311         *eid++ = hapd->cs_freq_params.channel;
 312         *eid++ = hapd->cs_count;
 313
 314         return eid;
 315 }
 316
 317
 318 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
 319 {
 320         if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
 321                 return eid;
 322
 323         *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
 324         *eid++ = 4;
 325         *eid++ = hapd->cs_block_tx;
 326         *eid++ = hapd->iface->cs_oper_class;
 327         *eid++ = hapd->cs_freq_params.channel;
 328         *eid++ = hapd->cs_count;
 329
 330         return eid;
 331 }
 332
 333
 334 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
 335 {
 336         u8 op_class, channel;
 337
 338         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
 339             !hapd->iface->freq)
 340                 return eid;
 341
 342         if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
 343                                           hapd->iconf->secondary_channel,
 344                                           hapd->iconf->vht_oper_chwidth,
 345                                           &op_class, &channel) ==
 346             NUM_HOSTAPD_MODES)
 347                 return eid;
 348
 349         *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
 350         *eid++ = 2;
 351
 352         /* Current Operating Class */
 353         *eid++ = op_class;
 354
 355         /* TODO: Advertise all the supported operating classes */
 356         *eid++ = 0;
 357
 358         return eid;
 359 }
 360
 361
 362 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 363                                    const struct ieee80211_mgmt *req,
 364                                    int is_p2p, size_t *resp_len)
 365 {
 366         struct ieee80211_mgmt *resp;
 367         u8 *pos, *epos, *csa_pos;
 368         size_t buflen;
 369
 370 #define MAX_PROBERESP_LEN 768
 371         buflen = MAX_PROBERESP_LEN;
 372 #ifdef CONFIG_WPS
 373         if (hapd->wps_probe_resp_ie)
 374                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 375 #endif /* CONFIG_WPS */
 376 #ifdef CONFIG_P2P
 377         if (hapd->p2p_probe_resp_ie)
 378                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 379 #endif /* CONFIG_P2P */
 380 #ifdef CONFIG_FST
 381         if (hapd->iface->fst_ies)
 382                 buflen += wpabuf_len(hapd->iface->fst_ies);
 383 #endif /* CONFIG_FST */
 384         if (hapd->conf->vendor_elements)
 385                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 386         if (hapd->conf->vendor_vht) {
 387                 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 388                         2 + sizeof(struct ieee80211_vht_operation);
 389         }
 390         resp = os_zalloc(buflen);
 391         if (resp == NULL)
 392                 return NULL;
 393
 394         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 395
 396         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 397                                            WLAN_FC_STYPE_PROBE_RESP);
 398         if (req)
 399                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 400         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 401
 402         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 403         resp->u.probe_resp.beacon_int =
 404                 host_to_le16(hapd->iconf->beacon_int);
 405
 406         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 407         resp->u.probe_resp.capab_info =
 408                 host_to_le16(hostapd_own_capab_info(hapd));
 409
 410         pos = resp->u.probe_resp.variable;
 411         *pos++ = WLAN_EID_SSID;
 412         *pos++ = hapd->conf->ssid.ssid_len;
 413         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 414         pos += hapd->conf->ssid.ssid_len;
 415
 416         /* Supported rates */
 417         pos = hostapd_eid_supp_rates(hapd, pos);
 418
 419         /* DS Params */
 420         pos = hostapd_eid_ds_params(hapd, pos);
 421
 422         pos = hostapd_eid_country(hapd, pos, epos - pos);
 423
 424         /* Power Constraint element */
 425         pos = hostapd_eid_pwr_constraint(hapd, pos);
 426
 427         /* CSA IE */
 428         csa_pos = hostapd_eid_csa(hapd, pos);
 429         if (csa_pos != pos)
 430                 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
 431         pos = csa_pos;
 432
 433         /* ERP Information element */
 434         pos = hostapd_eid_erp_info(hapd, pos);
 435
 436         /* Extended supported rates */
 437         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 438
 439         /* RSN, MDIE, WPA */
 440         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 441
 442         pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 443
 444         pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
 445
 446         /* eCSA IE */
 447         csa_pos = hostapd_eid_ecsa(hapd, pos);
 448         if (csa_pos != pos)
 449                 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
 450         pos = csa_pos;
 451
 452         pos = hostapd_eid_supported_op_classes(hapd, pos);
 453
 454 #ifdef CONFIG_IEEE80211N
 455         /* Secondary Channel Offset element */
 456         /* TODO: The standard doesn't specify a position for this element. */
 457         pos = hostapd_eid_secondary_channel(hapd, pos);
 458
 459         pos = hostapd_eid_ht_capabilities(hapd, pos);
 460         pos = hostapd_eid_ht_operation(hapd, pos);
 461 #endif /* CONFIG_IEEE80211N */
 462
 463         pos = hostapd_eid_ext_capab(hapd, pos);
 464
 465         pos = hostapd_eid_time_adv(hapd, pos);
 466         pos = hostapd_eid_time_zone(hapd, pos);
 467
 468         pos = hostapd_eid_interworking(hapd, pos);
 469         pos = hostapd_eid_adv_proto(hapd, pos);
 470         pos = hostapd_eid_roaming_consortium(hapd, pos);
 471
 472 #ifdef CONFIG_FST
 473         if (hapd->iface->fst_ies) {
 474                 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
 475                           wpabuf_len(hapd->iface->fst_ies));
 476                 pos += wpabuf_len(hapd->iface->fst_ies);
 477         }
 478 #endif /* CONFIG_FST */
 479
 480 #ifdef CONFIG_IEEE80211AC
 481         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
 482                 pos = hostapd_eid_vht_capabilities(hapd, pos);
 483                 pos = hostapd_eid_vht_operation(hapd, pos);
 484                 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
 485         }
 486         if (hapd->conf->vendor_vht)
 487                 pos = hostapd_eid_vendor_vht(hapd, pos);
 488 #endif /* CONFIG_IEEE80211AC */
 489
 490         /* Wi-Fi Alliance WMM */
 491         pos = hostapd_eid_wmm(hapd, pos);
 492
 493 #ifdef CONFIG_WPS
 494         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 495                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 496                           wpabuf_len(hapd->wps_probe_resp_ie));
 497                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 498         }
 499 #endif /* CONFIG_WPS */
 500
 501 #ifdef CONFIG_P2P
 502         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 503             hapd->p2p_probe_resp_ie) {
 504                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 505                           wpabuf_len(hapd->p2p_probe_resp_ie));
 506                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 507         }
 508 #endif /* CONFIG_P2P */
 509 #ifdef CONFIG_P2P_MANAGER
 510         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 511             P2P_MANAGE)
 512                 pos = hostapd_eid_p2p_manage(hapd, pos);
 513 #endif /* CONFIG_P2P_MANAGER */
 514
 515 #ifdef CONFIG_HS20
 516         pos = hostapd_eid_hs20_indication(hapd, pos);
 517         pos = hostapd_eid_osen(hapd, pos);
 518 #endif /* CONFIG_HS20 */
 519
 520         if (hapd->conf->vendor_elements) {
 521                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 522                           wpabuf_len(hapd->conf->vendor_elements));
 523                 pos += wpabuf_len(hapd->conf->vendor_elements);
 524         }
 525
 526         *resp_len = pos - (u8 *) resp;
 527         return (u8 *) resp;
 528 }
 529
 530
 531 enum ssid_match_result {
 532         NO_SSID_MATCH,
 533         EXACT_SSID_MATCH,
 534         WILDCARD_SSID_MATCH
 535 };
 536
 537 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 538                                          const u8 *ssid, size_t ssid_len,
 539                                          const u8 *ssid_list,
 540                                          size_t ssid_list_len)
 541 {
 542         const u8 *pos, *end;
 543         int wildcard = 0;
 544
 545         if (ssid_len == 0)
 546                 wildcard = 1;
 547         if (ssid_len == hapd->conf->ssid.ssid_len &&
 548             os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
 549                 return EXACT_SSID_MATCH;
 550
 551         if (ssid_list == NULL)
 552                 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 553
 554         pos = ssid_list;
 555         end = ssid_list + ssid_list_len;
 556         while (pos + 1 <= end) {
 557                 if (pos + 2 + pos[1] > end)
 558                         break;
 559                 if (pos[1] == 0)
 560                         wildcard = 1;
 561                 if (pos[1] == hapd->conf->ssid.ssid_len &&
 562                     os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
 563                         return EXACT_SSID_MATCH;
 564                 pos += 2 + pos[1];
 565         }
 566
 567         return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
 568 }
 569
 570
 571 void sta_track_expire(struct hostapd_iface *iface, int force)
 572 {
 573         struct os_reltime now;
 574         struct hostapd_sta_info *info;
 575
 576         if (!iface->num_sta_seen)
 577                 return;
 578
 579         os_get_reltime(&now);
 580         while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
 581                                      list))) {
 582                 if (!force &&
 583                     !os_reltime_expired(&now, &info->last_seen,
 584                                         iface->conf->track_sta_max_age))
 585                         break;
 586                 force = 0;
 587
 588                 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
 589                            MACSTR, iface->bss[0]->conf->iface,
 590                            MAC2STR(info->addr));
 591                 dl_list_del(&info->list);
 592                 iface->num_sta_seen--;
 593                 os_free(info);
 594         }
 595 }
 596
 597
 598 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 599                                                const u8 *addr)
 600 {
 601         struct hostapd_sta_info *info;
 602
 603         dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
 604                 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
 605                         return info;
 606
 607         return NULL;
 608 }
 609
 610
 611 void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 612 {
 613         struct hostapd_sta_info *info;
 614
 615         info = sta_track_get(iface, addr);
 616         if (info) {
 617                 /* Move the most recent entry to the end of the list */
 618                 dl_list_del(&info->list);
 619                 dl_list_add_tail(&iface->sta_seen, &info->list);
 620                 os_get_reltime(&info->last_seen);
 621                 return;
 622         }
 623
 624         /* Add a new entry */
 625         info = os_zalloc(sizeof(*info));
 626         os_memcpy(info->addr, addr, ETH_ALEN);
 627         os_get_reltime(&info->last_seen);
 628
 629         if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 630                 /* Expire oldest entry to make room for a new one */
 631                 sta_track_expire(iface, 1);
 632         }
 633
 634         wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
 635                    MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
 636         dl_list_add_tail(&iface->sta_seen, &info->list);
 637         iface->num_sta_seen++;
 638 }
 639
 640
 641 struct hostapd_data *
 642 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
 643                   const char *ifname)
 644 {
 645         struct hapd_interfaces *interfaces = iface->interfaces;
 646         size_t i, j;
 647
 648         for (i = 0; i < interfaces->count; i++) {
 649                 struct hostapd_data *hapd = NULL;
 650
 651                 iface = interfaces->iface[i];
 652                 for (j = 0; j < iface->num_bss; j++) {
 653                         hapd = iface->bss[j];
 654                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
 655                                 break;
 656                         hapd = NULL;
 657                 }
 658
 659                 if (hapd && sta_track_get(iface, addr))
 660                         return hapd;
 661         }
 662
 663         return NULL;
 664 }
 665
 666
 667 void handle_probe_req(struct hostapd_data *hapd,
 668                       const struct ieee80211_mgmt *mgmt, size_t len,
 669                       int ssi_signal)
 670 {
 671         u8 *resp;
 672         struct ieee802_11_elems elems;
 673         const u8 *ie;
 674         size_t ie_len;
 675         size_t i, resp_len;
 676         int noack;
 677         enum ssid_match_result res;
 678         int ret;
 679         u16 csa_offs[2];
 680         size_t csa_offs_len;
 681
 682         ie = mgmt->u.probe_req.variable;
 683         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 684                 return;
 685         if (hapd->iconf->track_sta_max_num)
 686                 sta_track_add(hapd->iface, mgmt->sa);
 687         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 688
 689         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 690                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 691                                             mgmt->sa, mgmt->da, mgmt->bssid,
 692                                             ie, ie_len, ssi_signal) > 0)
 693                         return;
 694
 695         if (!hapd->iconf->send_probe_response)
 696                 return;
 697
 698         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 699                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 700                            MAC2STR(mgmt->sa));
 701                 return;
 702         }
 703
 704         if ((!elems.ssid || !elems.supp_rates)) {
 705                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 706                            "without SSID or supported rates element",
 707                            MAC2STR(mgmt->sa));
 708                 return;
 709         }
 710
 711         /*
 712          * No need to reply if the Probe Request frame was sent on an adjacent
 713          * channel. IEEE Std 802.11-2012 describes this as a requirement for an
 714          * AP with dot11RadioMeasurementActivated set to true, but strictly
 715          * speaking does not allow such ignoring of Probe Request frames if
 716          * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
 717          * number of unnecessary Probe Response frames for cases where the STA
 718          * is less likely to see them (Probe Request frame sent on a
 719          * neighboring, but partially overlapping, channel).
 720          */
 721         if (elems.ds_params &&
 722             hapd->iface->current_mode &&
 723             (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
 724              hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
 725             hapd->iconf->channel != elems.ds_params[0]) {
 726                 wpa_printf(MSG_DEBUG,
 727                            "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
 728                            hapd->iconf->channel, elems.ds_params[0]);
 729                 return;
 730         }
 731
 732 #ifdef CONFIG_P2P
 733         if (hapd->p2p && elems.wps_ie) {
 734                 struct wpabuf *wps;
 735                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 736                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 737                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 738                                    "due to mismatch with Requested Device "
 739                                    "Type");
 740                         wpabuf_free(wps);
 741                         return;
 742                 }
 743                 wpabuf_free(wps);
 744         }
 745
 746         if (hapd->p2p && elems.p2p) {
 747                 struct wpabuf *p2p;
 748                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 749                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 750                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 751                                    "due to mismatch with Device ID");
 752                         wpabuf_free(p2p);
 753                         return;
 754                 }
 755                 wpabuf_free(p2p);
 756         }
 757 #endif /* CONFIG_P2P */
 758
 759         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
 760             elems.ssid_list_len == 0) {
 761                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 762                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 763                 return;
 764         }
 765
 766 #ifdef CONFIG_P2P
 767         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 768             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 769             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 770                       P2P_WILDCARD_SSID_LEN) == 0) {
 771                 /* Process P2P Wildcard SSID like Wildcard SSID */
 772                 elems.ssid_len = 0;
 773         }
 774 #endif /* CONFIG_P2P */
 775
 776         res = ssid_match(hapd, elems.ssid, elems.ssid_len,
 777                          elems.ssid_list, elems.ssid_list_len);
 778         if (res == NO_SSID_MATCH) {
 779                 if (!(mgmt->da[0] & 0x01)) {
 780                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 781                                    " for foreign SSID '%s' (DA " MACSTR ")%s",
 782                                    MAC2STR(mgmt->sa),
 783                                    wpa_ssid_txt(elems.ssid, elems.ssid_len),
 784                                    MAC2STR(mgmt->da),
 785                                    elems.ssid_list ? " (SSID list)" : "");
 786                 }
 787                 return;
 788         }
 789
 790 #ifdef CONFIG_INTERWORKING
 791         if (hapd->conf->interworking &&
 792             elems.interworking && elems.interworking_len >= 1) {
 793                 u8 ant = elems.interworking[0] & 0x0f;
 794                 if (ant != INTERWORKING_ANT_WILDCARD &&
 795                     ant != hapd->conf->access_network_type) {
 796                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 797                                    " for mismatching ANT %u ignored",
 798                                    MAC2STR(mgmt->sa), ant);
 799                         return;
 800                 }
 801         }
 802
 803         if (hapd->conf->interworking && elems.interworking &&
 804             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 805                 const u8 *hessid;
 806                 if (elems.interworking_len == 7)
 807                         hessid = elems.interworking + 1;
 808                 else
 809                         hessid = elems.interworking + 1 + 2;
 810                 if (!is_broadcast_ether_addr(hessid) &&
 811                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 812                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 813                                    " for mismatching HESSID " MACSTR
 814                                    " ignored",
 815                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 816                         return;
 817                 }
 818         }
 819 #endif /* CONFIG_INTERWORKING */
 820
 821 #ifdef CONFIG_P2P
 822         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 823             supp_rates_11b_only(&elems)) {
 824                 /* Indicates support for 11b rates only */
 825                 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
 826                            MACSTR " with only 802.11b rates",
 827                            MAC2STR(mgmt->sa));
 828                 return;
 829         }
 830 #endif /* CONFIG_P2P */
 831
 832         /* TODO: verify that supp_rates contains at least one matching rate
 833          * with AP configuration */
 834
 835         if (hapd->conf->no_probe_resp_if_seen_on &&
 836             is_multicast_ether_addr(mgmt->da) &&
 837             is_multicast_ether_addr(mgmt->bssid) &&
 838             sta_track_seen_on(hapd->iface, mgmt->sa,
 839                               hapd->conf->no_probe_resp_if_seen_on)) {
 840                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 841                            " since STA has been seen on %s",
 842                            hapd->conf->iface, MAC2STR(mgmt->sa),
 843                            hapd->conf->no_probe_resp_if_seen_on);
 844                 return;
 845         }
 846
 847         if (hapd->conf->no_probe_resp_if_max_sta &&
 848             is_multicast_ether_addr(mgmt->da) &&
 849             is_multicast_ether_addr(mgmt->bssid) &&
 850             hapd->num_sta >= hapd->conf->max_num_sta &&
 851             !ap_get_sta(hapd, mgmt->sa)) {
 852                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
 853                            " since no room for additional STA",
 854                            hapd->conf->iface, MAC2STR(mgmt->sa));
 855                 return;
 856         }
 857
 858 #ifdef CONFIG_TESTING_OPTIONS
 859         if (hapd->iconf->ignore_probe_probability > 0.0 &&
 860             drand48() < hapd->iconf->ignore_probe_probability) {
 861                 wpa_printf(MSG_INFO,
 862                            "TESTING: ignoring probe request from " MACSTR,
 863                            MAC2STR(mgmt->sa));
 864                 return;
 865         }
 866 #endif /* CONFIG_TESTING_OPTIONS */
 867
 868         resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
 869                                       &resp_len);
 870         if (resp == NULL)
 871                 return;
 872
 873         /*
 874          * If this is a broadcast probe request, apply no ack policy to avoid
 875          * excessive retries.
 876          */
 877         noack = !!(res == WILDCARD_SSID_MATCH &&
 878                    is_broadcast_ether_addr(mgmt->da));
 879
 880         csa_offs_len = 0;
 881         if (hapd->csa_in_progress) {
 882                 if (hapd->cs_c_off_proberesp)
 883                         csa_offs[csa_offs_len++] =
 884                                 hapd->cs_c_off_proberesp;
 885
 886                 if (hapd->cs_c_off_ecsa_proberesp)
 887                         csa_offs[csa_offs_len++] =
 888                                 hapd->cs_c_off_ecsa_proberesp;
 889         }
 890
 891         ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
 892                                         csa_offs_len ? csa_offs : NULL,
 893                                         csa_offs_len);
 894
 895         if (ret < 0)
 896                 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
 897
 898         os_free(resp);
 899
 900         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 901                    "SSID", MAC2STR(mgmt->sa),
 902                    elems.ssid_len == 0 ? "broadcast" : "our");
 903 }
 904
 905
 906 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 907                                         size_t *resp_len)
 908 {
 909         /* check probe response offloading caps and print warnings */
 910         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 911                 return NULL;
 912
 913 #ifdef CONFIG_WPS
 914         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 915             (!(hapd->iface->probe_resp_offloads &
 916                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 917                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 918                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 919                            "Probe Response while not supporting this");
 920 #endif /* CONFIG_WPS */
 921
 922 #ifdef CONFIG_P2P
 923         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 924             !(hapd->iface->probe_resp_offloads &
 925               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 926                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 927                            "Probe Response while not supporting this");
 928 #endif  /* CONFIG_P2P */
 929
 930         if (hapd->conf->interworking &&
 931             !(hapd->iface->probe_resp_offloads &
 932               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 933                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 934                            "Interworking Probe Response while not supporting "
 935                            "this");
 936
 937         /* Generate a Probe Response template for the non-P2P case */
 938         return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 939 }
 940
 941 #endif /* NEED_AP_MLME */
 942
 943
 944 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 945                                struct wpa_driver_ap_params *params)
 946 {
 947         struct ieee80211_mgmt *head = NULL;
 948         u8 *tail = NULL;
 949         size_t head_len = 0, tail_len = 0;
 950         u8 *resp = NULL;
 951         size_t resp_len = 0;
 952 #ifdef NEED_AP_MLME
 953         u16 capab_info;
 954         u8 *pos, *tailpos, *csa_pos;
 955
 956 #define BEACON_HEAD_BUF_SIZE 256
 957 #define BEACON_TAIL_BUF_SIZE 512
 958         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 959         tail_len = BEACON_TAIL_BUF_SIZE;
 960 #ifdef CONFIG_WPS
 961         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 962                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 963 #endif /* CONFIG_WPS */
 964 #ifdef CONFIG_P2P
 965         if (hapd->p2p_beacon_ie)
 966                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 967 #endif /* CONFIG_P2P */
 968 #ifdef CONFIG_FST
 969         if (hapd->iface->fst_ies)
 970                 tail_len += wpabuf_len(hapd->iface->fst_ies);
 971 #endif /* CONFIG_FST */
 972         if (hapd->conf->vendor_elements)
 973                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 974
 975 #ifdef CONFIG_IEEE80211AC
 976         if (hapd->conf->vendor_vht) {
 977                 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
 978                         2 + sizeof(struct ieee80211_vht_operation);
 979         }
 980 #endif /* CONFIG_IEEE80211AC */
 981
 982         tailpos = tail = os_malloc(tail_len);
 983         if (head == NULL || tail == NULL) {
 984                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 985                 os_free(head);
 986                 os_free(tail);
 987                 return -1;
 988         }
 989
 990         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 991                                            WLAN_FC_STYPE_BEACON);
 992         head->duration = host_to_le16(0);
 993         os_memset(head->da, 0xff, ETH_ALEN);
 994
 995         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 996         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 997         head->u.beacon.beacon_int =
 998                 host_to_le16(hapd->iconf->beacon_int);
 999
1000         /* hardware or low-level driver will setup seq_ctrl and timestamp */
1001         capab_info = hostapd_own_capab_info(hapd);
1002         head->u.beacon.capab_info = host_to_le16(capab_info);
1003         pos = &head->u.beacon.variable[0];
1004
1005         /* SSID */
1006         *pos++ = WLAN_EID_SSID;
1007         if (hapd->conf->ignore_broadcast_ssid == 2) {
1008                 /* clear the data, but keep the correct length of the SSID */
1009                 *pos++ = hapd->conf->ssid.ssid_len;
1010                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1011                 pos += hapd->conf->ssid.ssid_len;
1012         } else if (hapd->conf->ignore_broadcast_ssid) {
1013                 *pos++ = 0; /* empty SSID */
1014         } else {
1015                 *pos++ = hapd->conf->ssid.ssid_len;
1016                 os_memcpy(pos, hapd->conf->ssid.ssid,
1017                           hapd->conf->ssid.ssid_len);
1018                 pos += hapd->conf->ssid.ssid_len;
1019         }
1020
1021         /* Supported rates */
1022         pos = hostapd_eid_supp_rates(hapd, pos);
1023
1024         /* DS Params */
1025         pos = hostapd_eid_ds_params(hapd, pos);
1026
1027         head_len = pos - (u8 *) head;
1028
1029         tailpos = hostapd_eid_country(hapd, tailpos,
1030                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
1031
1032         /* Power Constraint element */
1033         tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1034
1035         /* CSA IE */
1036         csa_pos = hostapd_eid_csa(hapd, tailpos);
1037         if (csa_pos != tailpos)
1038                 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1039         tailpos = csa_pos;
1040
1041         /* ERP Information element */
1042         tailpos = hostapd_eid_erp_info(hapd, tailpos);
1043
1044         /* Extended supported rates */
1045         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1046
1047         /* RSN, MDIE, WPA */
1048         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1049                                   tailpos);
1050
1051         tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1052                                                tail + BEACON_TAIL_BUF_SIZE -
1053                                                tailpos);
1054
1055         tailpos = hostapd_eid_bss_load(hapd, tailpos,
1056                                        tail + BEACON_TAIL_BUF_SIZE - tailpos);
1057
1058         /* eCSA IE */
1059         csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1060         if (csa_pos != tailpos)
1061                 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1062         tailpos = csa_pos;
1063
1064         tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1065
1066 #ifdef CONFIG_IEEE80211N
1067         /* Secondary Channel Offset element */
1068         /* TODO: The standard doesn't specify a position for this element. */
1069         tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1070
1071         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1072         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1073 #endif /* CONFIG_IEEE80211N */
1074
1075         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1076
1077         /*
1078          * TODO: Time Advertisement element should only be included in some
1079          * DTIM Beacon frames.
1080          */
1081         tailpos = hostapd_eid_time_adv(hapd, tailpos);
1082
1083         tailpos = hostapd_eid_interworking(hapd, tailpos);
1084         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1085         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1086
1087 #ifdef CONFIG_FST
1088         if (hapd->iface->fst_ies) {
1089                 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1090                           wpabuf_len(hapd->iface->fst_ies));
1091                 tailpos += wpabuf_len(hapd->iface->fst_ies);
1092         }
1093 #endif /* CONFIG_FST */
1094
1095 #ifdef CONFIG_IEEE80211AC
1096         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1097                 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
1098                 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1099                 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1100         }
1101         if (hapd->conf->vendor_vht)
1102                 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1103 #endif /* CONFIG_IEEE80211AC */
1104
1105         /* Wi-Fi Alliance WMM */
1106         tailpos = hostapd_eid_wmm(hapd, tailpos);
1107
1108 #ifdef CONFIG_WPS
1109         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1110                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1111                           wpabuf_len(hapd->wps_beacon_ie));
1112                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1113         }
1114 #endif /* CONFIG_WPS */
1115
1116 #ifdef CONFIG_P2P
1117         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1118                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1119                           wpabuf_len(hapd->p2p_beacon_ie));
1120                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1121         }
1122 #endif /* CONFIG_P2P */
1123 #ifdef CONFIG_P2P_MANAGER
1124         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1125             P2P_MANAGE)
1126                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1127 #endif /* CONFIG_P2P_MANAGER */
1128
1129 #ifdef CONFIG_HS20
1130         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1131         tailpos = hostapd_eid_osen(hapd, tailpos);
1132 #endif /* CONFIG_HS20 */
1133
1134         if (hapd->conf->vendor_elements) {
1135                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1136                           wpabuf_len(hapd->conf->vendor_elements));
1137                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1138         }
1139
1140         tail_len = tailpos > tail ? tailpos - tail : 0;
1141
1142         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1143 #endif /* NEED_AP_MLME */
1144
1145         os_memset(params, 0, sizeof(*params));
1146         params->head = (u8 *) head;
1147         params->head_len = head_len;
1148         params->tail = tail;
1149         params->tail_len = tail_len;
1150         params->proberesp = resp;
1151         params->proberesp_len = resp_len;
1152         params->dtim_period = hapd->conf->dtim_period;
1153         params->beacon_int = hapd->iconf->beacon_int;
1154         params->basic_rates = hapd->iface->basic_rates;
1155         params->ssid = hapd->conf->ssid.ssid;
1156         params->ssid_len = hapd->conf->ssid.ssid_len;
1157         if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1158             (WPA_PROTO_WPA | WPA_PROTO_RSN))
1159                 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1160                         hapd->conf->rsn_pairwise;
1161         else if (hapd->conf->wpa & WPA_PROTO_RSN)
1162                 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1163         else if (hapd->conf->wpa & WPA_PROTO_WPA)
1164                 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1165         params->group_cipher = hapd->conf->wpa_group;
1166         params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1167         params->auth_algs = hapd->conf->auth_algs;
1168         params->wpa_version = hapd->conf->wpa;
1169         params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1170                 (hapd->conf->ieee802_1x &&
1171                  (hapd->conf->default_wep_key_len ||
1172                   hapd->conf->individual_wep_key_len));
1173         switch (hapd->conf->ignore_broadcast_ssid) {
1174         case 0:
1175                 params->hide_ssid = NO_SSID_HIDING;
1176                 break;
1177         case 1:
1178                 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1179                 break;
1180         case 2:
1181                 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1182                 break;
1183         }
1184         params->isolate = hapd->conf->isolate;
1185         params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1186 #ifdef NEED_AP_MLME
1187         params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1188                                 ERP_INFO_USE_PROTECTION);
1189         params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1190                 hapd->iconf->preamble == SHORT_PREAMBLE;
1191         if (hapd->iface->current_mode &&
1192             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1193                 params->short_slot_time =
1194                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1195         else
1196                 params->short_slot_time = -1;
1197         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1198                 params->ht_opmode = -1;
1199         else
1200                 params->ht_opmode = hapd->iface->ht_op_mode;
1201 #endif /* NEED_AP_MLME */
1202         params->interworking = hapd->conf->interworking;
1203         if (hapd->conf->interworking &&
1204             !is_zero_ether_addr(hapd->conf->hessid))
1205                 params->hessid = hapd->conf->hessid;
1206         params->access_network_type = hapd->conf->access_network_type;
1207         params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1208 #ifdef CONFIG_P2P
1209         params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1210 #endif /* CONFIG_P2P */
1211 #ifdef CONFIG_HS20
1212         params->disable_dgaf = hapd->conf->disable_dgaf;
1213         if (hapd->conf->osen) {
1214                 params->privacy = 1;
1215                 params->osen = 1;
1216         }
1217 #endif /* CONFIG_HS20 */
1218         return 0;
1219 }
1220
1221
1222 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1223 {
1224         os_free(params->tail);
1225         params->tail = NULL;
1226         os_free(params->head);
1227         params->head = NULL;
1228         os_free(params->proberesp);
1229         params->proberesp = NULL;
1230 }
1231
1232
1233 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1234 {
1235         struct wpa_driver_ap_params params;
1236         struct hostapd_freq_params freq;
1237         struct hostapd_iface *iface = hapd->iface;
1238         struct hostapd_config *iconf = iface->conf;
1239         struct wpabuf *beacon, *proberesp, *assocresp;
1240         int res, ret = -1;
1241
1242         if (hapd->csa_in_progress) {
1243                 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1244                 return -1;
1245         }
1246
1247         hapd->beacon_set_done = 1;
1248
1249         if (ieee802_11_build_ap_params(hapd, &params) < 0)
1250                 return -1;
1251
1252         if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1253             0)
1254                 goto fail;
1255
1256         params.beacon_ies = beacon;
1257         params.proberesp_ies = proberesp;
1258         params.assocresp_ies = assocresp;
1259         params.reenable = hapd->reenable_beacon;
1260         hapd->reenable_beacon = 0;
1261
1262         if (iface->current_mode &&
1263             hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1264                                     iconf->channel, iconf->ieee80211n,
1265                                     iconf->ieee80211ac,
1266                                     iconf->secondary_channel,
1267                                     iconf->vht_oper_chwidth,
1268                                     iconf->vht_oper_centr_freq_seg0_idx,
1269                                     iconf->vht_oper_centr_freq_seg1_idx,
1270                                     iface->current_mode->vht_capab) == 0)
1271                 params.freq = &freq;
1272
1273         res = hostapd_drv_set_ap(hapd, &params);
1274         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1275         if (res)
1276                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1277         else
1278                 ret = 0;
1279 fail:
1280         ieee802_11_free_ap_params(&params);
1281         return ret;
1282 }
1283
1284
1285 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1286 {
1287         size_t i;
1288         int ret = 0;
1289
1290         for (i = 0; i < iface->num_bss; i++) {
1291                 if (iface->bss[i]->started &&
1292                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1293                         ret = -1;
1294         }
1295
1296         return ret;
1297 }
1298
1299
1300 /* only update beacons if started */
1301 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1302 {
1303         size_t i;
1304         int ret = 0;
1305
1306         for (i = 0; i < iface->num_bss; i++) {
1307                 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1308                     ieee802_11_set_beacon(iface->bss[i]) < 0)
1309                         ret = -1;
1310         }
1311
1312         return ret;
1313 }
1314
1315 #endif /* CONFIG_NATIVE_WINDOWS */