src/ap/ieee802_11.c

   1 /*
   2  * hostapd / IEEE 802.11 Management
   3  * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #ifndef CONFIG_NATIVE_WINDOWS
  12
  13 #include "utils/common.h"
  14 #include "utils/eloop.h"
  15 #include "crypto/crypto.h"
  16 #include "crypto/sha256.h"
  17 #include "crypto/random.h"
  18 #include "common/ieee802_11_defs.h"
  19 #include "common/ieee802_11_common.h"
  20 #include "common/wpa_ctrl.h"
  21 #include "common/sae.h"
  22 #include "radius/radius.h"
  23 #include "radius/radius_client.h"
  24 #include "p2p/p2p.h"
  25 #include "wps/wps.h"
  26 #include "hostapd.h"
  27 #include "beacon.h"
  28 #include "ieee802_11_auth.h"
  29 #include "sta_info.h"
  30 #include "ieee802_1x.h"
  31 #include "wpa_auth.h"
  32 #include "pmksa_cache_auth.h"
  33 #include "wmm.h"
  34 #include "ap_list.h"
  35 #include "accounting.h"
  36 #include "ap_config.h"
  37 #include "ap_mlme.h"
  38 #include "p2p_hostapd.h"
  39 #include "ap_drv_ops.h"
  40 #include "wnm_ap.h"
  41 #include "ieee802_11.h"
  42 #include "dfs.h"
  43
  44
  45 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
  46 {
  47         u8 *pos = eid;
  48         int i, num, count;
  49
  50         if (hapd->iface->current_rates == NULL)
  51                 return eid;
  52
  53         *pos++ = WLAN_EID_SUPP_RATES;
  54         num = hapd->iface->num_rates;
  55         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
  56                 num++;
  57         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
  58                 num++;
  59         if (num > 8) {
  60                 /* rest of the rates are encoded in Extended supported
  61                  * rates element */
  62                 num = 8;
  63         }
  64
  65         *pos++ = num;
  66         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
  67              i++) {
  68                 count++;
  69                 *pos = hapd->iface->current_rates[i].rate / 5;
  70                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
  71                         *pos |= 0x80;
  72                 pos++;
  73         }
  74
  75         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
  76                 count++;
  77                 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
  78         }
  79
  80         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
  81                 count++;
  82                 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
  83         }
  84
  85         return pos;
  86 }
  87
  88
  89 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
  90 {
  91         u8 *pos = eid;
  92         int i, num, count;
  93
  94         if (hapd->iface->current_rates == NULL)
  95                 return eid;
  96
  97         num = hapd->iface->num_rates;
  98         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
  99                 num++;
 100         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
 101                 num++;
 102         if (num <= 8)
 103                 return eid;
 104         num -= 8;
 105
 106         *pos++ = WLAN_EID_EXT_SUPP_RATES;
 107         *pos++ = num;
 108         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
 109              i++) {
 110                 count++;
 111                 if (count <= 8)
 112                         continue; /* already in SuppRates IE */
 113                 *pos = hapd->iface->current_rates[i].rate / 5;
 114                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
 115                         *pos |= 0x80;
 116                 pos++;
 117         }
 118
 119         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
 120                 count++;
 121                 if (count > 8)
 122                         *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
 123         }
 124
 125         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
 126                 count++;
 127                 if (count > 8)
 128                         *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
 129         }
 130
 131         return pos;
 132 }
 133
 134
 135 u16 hostapd_own_capab_info(struct hostapd_data *hapd)
 136 {
 137         int capab = WLAN_CAPABILITY_ESS;
 138         int privacy;
 139         int dfs;
 140
 141         /* Check if any of configured channels require DFS */
 142         dfs = hostapd_is_dfs_required(hapd->iface);
 143         if (dfs < 0) {
 144                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 145                            dfs);
 146                 dfs = 0;
 147         }
 148
 149         if (hapd->iface->num_sta_no_short_preamble == 0 &&
 150             hapd->iconf->preamble == SHORT_PREAMBLE)
 151                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 152
 153         privacy = hapd->conf->ssid.wep.keys_set;
 154
 155         if (hapd->conf->ieee802_1x &&
 156             (hapd->conf->default_wep_key_len ||
 157              hapd->conf->individual_wep_key_len))
 158                 privacy = 1;
 159
 160         if (hapd->conf->wpa)
 161                 privacy = 1;
 162
 163 #ifdef CONFIG_HS20
 164         if (hapd->conf->osen)
 165                 privacy = 1;
 166 #endif /* CONFIG_HS20 */
 167
 168         if (privacy)
 169                 capab |= WLAN_CAPABILITY_PRIVACY;
 170
 171         if (hapd->iface->current_mode &&
 172             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
 173             hapd->iface->num_sta_no_short_slot_time == 0)
 174                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 175
 176         /*
 177          * Currently, Spectrum Management capability bit is set when directly
 178          * requested in configuration by spectrum_mgmt_required or when AP is
 179          * running on DFS channel.
 180          * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
 181          */
 182         if (hapd->iface->current_mode &&
 183             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
 184             (hapd->iconf->spectrum_mgmt_required || dfs))
 185                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 186
 187         if (hapd->conf->radio_measurements)
 188                 capab |= IEEE80211_CAP_RRM;
 189
 190         return capab;
 191 }
 192
 193
 194 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
 195                            u16 auth_transaction, const u8 *challenge,
 196                            int iswep)
 197 {
 198         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 199                        HOSTAPD_LEVEL_DEBUG,
 200                        "authentication (shared key, transaction %d)",
 201                        auth_transaction);
 202
 203         if (auth_transaction == 1) {
 204                 if (!sta->challenge) {
 205                         /* Generate a pseudo-random challenge */
 206                         u8 key[8];
 207                         struct os_time now;
 208                         int r;
 209                         sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
 210                         if (sta->challenge == NULL)
 211                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 212
 213                         os_get_time(&now);
 214                         r = os_random();
 215                         os_memcpy(key, &now.sec, 4);
 216                         os_memcpy(key + 4, &r, 4);
 217                         rc4_skip(key, sizeof(key), 0,
 218                                  sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
 219                 }
 220                 return 0;
 221         }
 222
 223         if (auth_transaction != 3)
 224                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 225
 226         /* Transaction 3 */
 227         if (!iswep || !sta->challenge || !challenge ||
 228             os_memcmp_const(sta->challenge, challenge,
 229                             WLAN_AUTH_CHALLENGE_LEN)) {
 230                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 231                                HOSTAPD_LEVEL_INFO,
 232                                "shared key authentication - invalid "
 233                                "challenge-response");
 234                 return WLAN_STATUS_CHALLENGE_FAIL;
 235         }
 236
 237         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 238                        HOSTAPD_LEVEL_DEBUG,
 239                        "authentication OK (shared key)");
 240         sta->flags |= WLAN_STA_AUTH;
 241         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 242         os_free(sta->challenge);
 243         sta->challenge = NULL;
 244
 245         return 0;
 246 }
 247
 248
 249 static void send_auth_reply(struct hostapd_data *hapd,
 250                             const u8 *dst, const u8 *bssid,
 251                             u16 auth_alg, u16 auth_transaction, u16 resp,
 252                             const u8 *ies, size_t ies_len)
 253 {
 254         struct ieee80211_mgmt *reply;
 255         u8 *buf;
 256         size_t rlen;
 257
 258         rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
 259         buf = os_zalloc(rlen);
 260         if (buf == NULL)
 261                 return;
 262
 263         reply = (struct ieee80211_mgmt *) buf;
 264         reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 265                                             WLAN_FC_STYPE_AUTH);
 266         os_memcpy(reply->da, dst, ETH_ALEN);
 267         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
 268         os_memcpy(reply->bssid, bssid, ETH_ALEN);
 269
 270         reply->u.auth.auth_alg = host_to_le16(auth_alg);
 271         reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
 272         reply->u.auth.status_code = host_to_le16(resp);
 273
 274         if (ies && ies_len)
 275                 os_memcpy(reply->u.auth.variable, ies, ies_len);
 276
 277         wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
 278                    " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
 279                    MAC2STR(dst), auth_alg, auth_transaction,
 280                    resp, (unsigned long) ies_len);
 281         if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0)
 282                 wpa_printf(MSG_INFO, "send_auth_reply: send");
 283
 284         os_free(buf);
 285 }
 286
 287
 288 #ifdef CONFIG_IEEE80211R
 289 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
 290                                   u16 auth_transaction, u16 status,
 291                                   const u8 *ies, size_t ies_len)
 292 {
 293         struct hostapd_data *hapd = ctx;
 294         struct sta_info *sta;
 295
 296         send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
 297                         status, ies, ies_len);
 298
 299         if (status != WLAN_STATUS_SUCCESS)
 300                 return;
 301
 302         sta = ap_get_sta(hapd, dst);
 303         if (sta == NULL)
 304                 return;
 305
 306         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
 307                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
 308         sta->flags |= WLAN_STA_AUTH;
 309         mlme_authenticate_indication(hapd, sta);
 310 }
 311 #endif /* CONFIG_IEEE80211R */
 312
 313
 314 #ifdef CONFIG_SAE
 315
 316 #define dot11RSNASAERetransPeriod 40    /* msec */
 317 #define dot11RSNASAESync 5              /* attempts */
 318
 319
 320 static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd,
 321                                              struct sta_info *sta, int update)
 322 {
 323         struct wpabuf *buf;
 324
 325         if (hapd->conf->ssid.wpa_passphrase == NULL) {
 326                 wpa_printf(MSG_DEBUG, "SAE: No password available");
 327                 return NULL;
 328         }
 329
 330         if (update &&
 331             sae_prepare_commit(hapd->own_addr, sta->addr,
 332                                (u8 *) hapd->conf->ssid.wpa_passphrase,
 333                                os_strlen(hapd->conf->ssid.wpa_passphrase),
 334                                sta->sae) < 0) {
 335                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
 336                 return NULL;
 337         }
 338
 339         buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN);
 340         if (buf == NULL)
 341                 return NULL;
 342         sae_write_commit(sta->sae, buf, sta->sae->tmp ?
 343                          sta->sae->tmp->anti_clogging_token : NULL);
 344
 345         return buf;
 346 }
 347
 348
 349 static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
 350                                               struct sta_info *sta)
 351 {
 352         struct wpabuf *buf;
 353
 354         buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
 355         if (buf == NULL)
 356                 return NULL;
 357
 358         sae_write_confirm(sta->sae, buf);
 359
 360         return buf;
 361 }
 362
 363
 364 static int auth_sae_send_commit(struct hostapd_data *hapd,
 365                                 struct sta_info *sta,
 366                                 const u8 *bssid, int update)
 367 {
 368         struct wpabuf *data;
 369
 370         data = auth_build_sae_commit(hapd, sta, update);
 371         if (data == NULL)
 372                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 373
 374         send_auth_reply(hapd, sta->addr, bssid,
 375                         WLAN_AUTH_SAE, 1, WLAN_STATUS_SUCCESS,
 376                         wpabuf_head(data), wpabuf_len(data));
 377
 378         wpabuf_free(data);
 379
 380         return WLAN_STATUS_SUCCESS;
 381 }
 382
 383
 384 static int auth_sae_send_confirm(struct hostapd_data *hapd,
 385                                  struct sta_info *sta,
 386                                  const u8 *bssid)
 387 {
 388         struct wpabuf *data;
 389
 390         data = auth_build_sae_confirm(hapd, sta);
 391         if (data == NULL)
 392                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 393
 394         send_auth_reply(hapd, sta->addr, bssid,
 395                         WLAN_AUTH_SAE, 2, WLAN_STATUS_SUCCESS,
 396                         wpabuf_head(data), wpabuf_len(data));
 397
 398         wpabuf_free(data);
 399
 400         return WLAN_STATUS_SUCCESS;
 401 }
 402
 403
 404 static int use_sae_anti_clogging(struct hostapd_data *hapd)
 405 {
 406         struct sta_info *sta;
 407         unsigned int open = 0;
 408
 409         if (hapd->conf->sae_anti_clogging_threshold == 0)
 410                 return 1;
 411
 412         for (sta = hapd->sta_list; sta; sta = sta->next) {
 413                 if (!sta->sae)
 414                         continue;
 415                 if (sta->sae->state != SAE_COMMITTED &&
 416                     sta->sae->state != SAE_CONFIRMED)
 417                         continue;
 418                 open++;
 419                 if (open >= hapd->conf->sae_anti_clogging_threshold)
 420                         return 1;
 421         }
 422
 423         return 0;
 424 }
 425
 426
 427 static int check_sae_token(struct hostapd_data *hapd, const u8 *addr,
 428                            const u8 *token, size_t token_len)
 429 {
 430         u8 mac[SHA256_MAC_LEN];
 431
 432         if (token_len != SHA256_MAC_LEN)
 433                 return -1;
 434         if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
 435                         addr, ETH_ALEN, mac) < 0 ||
 436             os_memcmp_const(token, mac, SHA256_MAC_LEN) != 0)
 437                 return -1;
 438
 439         return 0;
 440 }
 441
 442
 443 static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
 444                                             int group, const u8 *addr)
 445 {
 446         struct wpabuf *buf;
 447         u8 *token;
 448         struct os_reltime now;
 449
 450         os_get_reltime(&now);
 451         if (!os_reltime_initialized(&hapd->last_sae_token_key_update) ||
 452             os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) {
 453                 if (random_get_bytes(hapd->sae_token_key,
 454                                      sizeof(hapd->sae_token_key)) < 0)
 455                         return NULL;
 456                 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key",
 457                             hapd->sae_token_key, sizeof(hapd->sae_token_key));
 458                 hapd->last_sae_token_key_update = now;
 459         }
 460
 461         buf = wpabuf_alloc(sizeof(le16) + SHA256_MAC_LEN);
 462         if (buf == NULL)
 463                 return NULL;
 464
 465         wpabuf_put_le16(buf, group); /* Finite Cyclic Group */
 466
 467         token = wpabuf_put(buf, SHA256_MAC_LEN);
 468         hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
 469                     addr, ETH_ALEN, token);
 470
 471         return buf;
 472 }
 473
 474
 475 static int sae_check_big_sync(struct sta_info *sta)
 476 {
 477         if (sta->sae->sync > dot11RSNASAESync) {
 478                 sta->sae->state = SAE_NOTHING;
 479                 sta->sae->sync = 0;
 480                 return -1;
 481         }
 482         return 0;
 483 }
 484
 485
 486 static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data)
 487 {
 488         struct hostapd_data *hapd = eloop_ctx;
 489         struct sta_info *sta = eloop_data;
 490         int ret;
 491
 492         if (sae_check_big_sync(sta))
 493                 return;
 494         sta->sae->sync++;
 495
 496         switch (sta->sae->state) {
 497         case SAE_COMMITTED:
 498                 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
 499                 eloop_register_timeout(0, dot11RSNASAERetransPeriod * 1000,
 500                                        auth_sae_retransmit_timer, hapd, sta);
 501                 break;
 502         case SAE_CONFIRMED:
 503                 ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr);
 504                 eloop_register_timeout(0, dot11RSNASAERetransPeriod * 1000,
 505                                        auth_sae_retransmit_timer, hapd, sta);
 506                 break;
 507         default:
 508                 ret = -1;
 509                 break;
 510         }
 511
 512         if (ret != WLAN_STATUS_SUCCESS)
 513                 wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret);
 514 }
 515
 516
 517 void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta)
 518 {
 519         eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
 520 }
 521
 522
 523 static void sae_set_retransmit_timer(struct hostapd_data *hapd,
 524                                      struct sta_info *sta)
 525 {
 526         if (!(hapd->conf->mesh & MESH_ENABLED))
 527                 return;
 528
 529         eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
 530         eloop_register_timeout(0, dot11RSNASAERetransPeriod * 1000,
 531                                auth_sae_retransmit_timer, hapd, sta);
 532 }
 533
 534
 535 static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta,
 536                        const u8 *bssid, u8 auth_transaction)
 537 {
 538         int ret;
 539
 540         if (auth_transaction != 1 && auth_transaction != 2)
 541                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 542
 543         switch (sta->sae->state) {
 544         case SAE_NOTHING:
 545                 if (auth_transaction == 1) {
 546                         ret = auth_sae_send_commit(hapd, sta, bssid, 1);
 547                         if (ret)
 548                                 return ret;
 549                         sta->sae->state = SAE_COMMITTED;
 550
 551                         if (sae_process_commit(sta->sae) < 0)
 552                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 553
 554                         /*
 555                          * In mesh case, both Commit and Confirm can be sent
 556                          * immediately. In infrastructure BSS, only a single
 557                          * Authentication frame (Commit) is expected from the AP
 558                          * here and the second one (Confirm) will be sent once
 559                          * the STA has sent its second Authentication frame
 560                          * (Confirm).
 561                          */
 562                         if (hapd->conf->mesh & MESH_ENABLED) {
 563                                 /*
 564                                  * Send both Commit and Confirm immediately
 565                                  * based on SAE finite state machine
 566                                  * Nothing -> Confirm transition.
 567                                  */
 568                                 ret = auth_sae_send_confirm(hapd, sta, bssid);
 569                                 if (ret)
 570                                         return ret;
 571                                 sta->sae->state = SAE_CONFIRMED;
 572                         } else {
 573                                 /*
 574                                  * For infrastructure BSS, send only the Commit
 575                                  * message now to get alternating sequence of
 576                                  * Authentication frames between the AP and STA.
 577                                  * Confirm will be sent in
 578                                  * Commited -> Confirmed/Accepted transition
 579                                  * when receiving Confirm from STA.
 580                                  */
 581                         }
 582                         sta->sae->sync = 0;
 583                         sae_set_retransmit_timer(hapd, sta);
 584                 } else {
 585                         hostapd_logger(hapd, sta->addr,
 586                                        HOSTAPD_MODULE_IEEE80211,
 587                                        HOSTAPD_LEVEL_DEBUG,
 588                                        "SAE confirm before commit");
 589                 }
 590                 break;
 591         case SAE_COMMITTED:
 592                 sae_clear_retransmit_timer(hapd, sta);
 593                 if (auth_transaction == 1) {
 594                         if (sae_process_commit(sta->sae) < 0)
 595                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 596
 597                         ret = auth_sae_send_confirm(hapd, sta, bssid);
 598                         if (ret)
 599                                 return ret;
 600                         sta->sae->state = SAE_CONFIRMED;
 601                         sta->sae->sync = 0;
 602                         sae_set_retransmit_timer(hapd, sta);
 603                 } else if (hapd->conf->mesh & MESH_ENABLED) {
 604                         /*
 605                          * In mesh case, follow SAE finite state machine and
 606                          * send Commit now, if sync count allows.
 607                          */
 608                         if (sae_check_big_sync(sta))
 609                                 return WLAN_STATUS_SUCCESS;
 610                         sta->sae->sync++;
 611
 612                         ret = auth_sae_send_commit(hapd, sta, bssid, 0);
 613                         if (ret)
 614                                 return ret;
 615
 616                         sae_set_retransmit_timer(hapd, sta);
 617                 } else {
 618                         /*
 619                          * For instructure BSS, send the postponed Confirm from
 620                          * Nothing -> Confirmed transition that was reduced to
 621                          * Nothing -> Committed above.
 622                          */
 623                         ret = auth_sae_send_confirm(hapd, sta, bssid);
 624                         if (ret)
 625                                 return ret;
 626
 627                         sta->sae->state = SAE_CONFIRMED;
 628
 629                         /*
 630                          * Since this was triggered on Confirm RX, run another
 631                          * step to get to Accepted without waiting for
 632                          * additional events.
 633                          */
 634                         return sae_sm_step(hapd, sta, bssid, auth_transaction);
 635                 }
 636                 break;
 637         case SAE_CONFIRMED:
 638                 sae_clear_retransmit_timer(hapd, sta);
 639                 if (auth_transaction == 1) {
 640                         if (sae_check_big_sync(sta))
 641                                 return WLAN_STATUS_SUCCESS;
 642                         sta->sae->sync++;
 643
 644                         ret = auth_sae_send_commit(hapd, sta, bssid, 1);
 645                         if (ret)
 646                                 return ret;
 647
 648                         if (sae_process_commit(sta->sae) < 0)
 649                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 650
 651                         ret = auth_sae_send_confirm(hapd, sta, bssid);
 652                         if (ret)
 653                                 return ret;
 654
 655                         sae_set_retransmit_timer(hapd, sta);
 656                 } else {
 657                         sta->flags |= WLAN_STA_AUTH;
 658                         sta->auth_alg = WLAN_AUTH_SAE;
 659                         mlme_authenticate_indication(hapd, sta);
 660                         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 661                         sta->sae->state = SAE_ACCEPTED;
 662                         wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr,
 663                                                sta->sae->pmk);
 664                 }
 665                 break;
 666         case SAE_ACCEPTED:
 667                 if (auth_transaction == 1) {
 668                         wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR
 669                                    ") doing reauthentication",
 670                                    MAC2STR(sta->addr));
 671                         ap_free_sta(hapd, sta);
 672                 } else {
 673                         if (sae_check_big_sync(sta))
 674                                 return WLAN_STATUS_SUCCESS;
 675                         sta->sae->sync++;
 676
 677                         ret = auth_sae_send_confirm(hapd, sta, bssid);
 678                         sae_clear_temp_data(sta->sae);
 679                         if (ret)
 680                                 return ret;
 681                 }
 682                 break;
 683         default:
 684                 wpa_printf(MSG_ERROR, "SAE: invalid state %d",
 685                            sta->sae->state);
 686                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 687         }
 688         return WLAN_STATUS_SUCCESS;
 689 }
 690
 691
 692 static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
 693                             const struct ieee80211_mgmt *mgmt, size_t len,
 694                             u16 auth_transaction, u16 status_code)
 695 {
 696         u16 resp = WLAN_STATUS_SUCCESS;
 697         struct wpabuf *data = NULL;
 698
 699         if (!sta->sae) {
 700                 if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS)
 701                         return;
 702                 sta->sae = os_zalloc(sizeof(*sta->sae));
 703                 if (sta->sae == NULL)
 704                         return;
 705                 sta->sae->state = SAE_NOTHING;
 706                 sta->sae->sync = 0;
 707         }
 708
 709         if (auth_transaction == 1) {
 710                 const u8 *token = NULL, *pos, *end;
 711                 size_t token_len = 0;
 712                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 713                                HOSTAPD_LEVEL_DEBUG,
 714                                "start SAE authentication (RX commit, status=%u)",
 715                                status_code);
 716
 717                 if ((hapd->conf->mesh & MESH_ENABLED) &&
 718                     status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 719                     sta->sae->tmp) {
 720                         pos = mgmt->u.auth.variable;
 721                         end = ((const u8 *) mgmt) + len;
 722                         if (pos + sizeof(le16) > end) {
 723                                 wpa_printf(MSG_ERROR,
 724                                            "SAE: Too short anti-clogging token request");
 725                                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 726                                 goto reply;
 727                         }
 728                         resp = sae_group_allowed(sta->sae,
 729                                                  hapd->conf->sae_groups,
 730                                                  WPA_GET_LE16(pos));
 731                         if (resp != WLAN_STATUS_SUCCESS) {
 732                                 wpa_printf(MSG_ERROR,
 733                                            "SAE: Invalid group in anti-clogging token request");
 734                                 goto reply;
 735                         }
 736                         pos += sizeof(le16);
 737
 738                         wpabuf_free(sta->sae->tmp->anti_clogging_token);
 739                         sta->sae->tmp->anti_clogging_token =
 740                                 wpabuf_alloc_copy(pos, end - pos);
 741                         if (sta->sae->tmp->anti_clogging_token == NULL) {
 742                                 wpa_printf(MSG_ERROR,
 743                                            "SAE: Failed to alloc for anti-clogging token");
 744                                 return;
 745                         }
 746
 747                         /*
 748                          * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code
 749                          * is 76, a new Commit Message shall be constructed
 750                          * with the Anti-Clogging Token from the received
 751                          * Authentication frame, and the commit-scalar and
 752                          * COMMIT-ELEMENT previously sent.
 753                          */
 754                         if (auth_sae_send_commit(hapd, sta, mgmt->bssid, 0)) {
 755                                 wpa_printf(MSG_ERROR,
 756                                            "SAE: Failed to send commit message");
 757                                 return;
 758                         }
 759                         sta->sae->state = SAE_COMMITTED;
 760                         sta->sae->sync = 0;
 761                         sae_set_retransmit_timer(hapd, sta);
 762                         return;
 763                 }
 764
 765                 if (status_code != WLAN_STATUS_SUCCESS)
 766                         return;
 767
 768                 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
 769                                         ((const u8 *) mgmt) + len -
 770                                         mgmt->u.auth.variable, &token,
 771                                         &token_len, hapd->conf->sae_groups);
 772                 if (resp == SAE_SILENTLY_DISCARD) {
 773                         wpa_printf(MSG_DEBUG,
 774                                    "SAE: Drop commit message from " MACSTR " due to reflection attack",
 775                                    MAC2STR(sta->addr));
 776                         return;
 777                 }
 778                 if (token && check_sae_token(hapd, sta->addr, token, token_len)
 779                     < 0) {
 780                         wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
 781                                    "incorrect token from " MACSTR,
 782                                    MAC2STR(sta->addr));
 783                         return;
 784                 }
 785
 786                 if (resp != WLAN_STATUS_SUCCESS)
 787                         goto reply;
 788
 789                 if (!token && use_sae_anti_clogging(hapd)) {
 790                         wpa_printf(MSG_DEBUG,
 791                                    "SAE: Request anti-clogging token from "
 792                                    MACSTR, MAC2STR(sta->addr));
 793                         data = auth_build_token_req(hapd, sta->sae->group,
 794                                                     sta->addr);
 795                         resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
 796                         if (hapd->conf->mesh & MESH_ENABLED)
 797                                 sta->sae->state = SAE_NOTHING;
 798                         goto reply;
 799                 }
 800
 801                 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
 802         } else if (auth_transaction == 2) {
 803                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 804                                HOSTAPD_LEVEL_DEBUG,
 805                                "SAE authentication (RX confirm, status=%u)",
 806                                status_code);
 807                 if (status_code != WLAN_STATUS_SUCCESS)
 808                         return;
 809                 if (sta->sae->state >= SAE_CONFIRMED ||
 810                     !(hapd->conf->mesh & MESH_ENABLED)) {
 811                         if (sae_check_confirm(sta->sae, mgmt->u.auth.variable,
 812                                               ((u8 *) mgmt) + len -
 813                                               mgmt->u.auth.variable) < 0) {
 814                                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 815                                 goto reply;
 816                         }
 817                 }
 818                 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
 819         } else {
 820                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 821                                HOSTAPD_LEVEL_DEBUG,
 822                                "unexpected SAE authentication transaction %u (status=%u)",
 823                                auth_transaction, status_code);
 824                 if (status_code != WLAN_STATUS_SUCCESS)
 825                         return;
 826                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 827         }
 828
 829 reply:
 830         if (resp != WLAN_STATUS_SUCCESS) {
 831                 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
 832                                 auth_transaction, resp,
 833                                 data ? wpabuf_head(data) : (u8 *) "",
 834                                 data ? wpabuf_len(data) : 0);
 835         }
 836         wpabuf_free(data);
 837 }
 838
 839
 840 /**
 841  * auth_sae_init_committed - Send COMMIT and start SAE in committed state
 842  * @hapd: BSS data for the device initiating the authentication
 843  * @sta: the peer to which commit authentication frame is sent
 844  *
 845  * This function implements Init event handling (IEEE Std 802.11-2012,
 846  * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the
 847  * sta->sae structure should be initialized appropriately via a call to
 848  * sae_prepare_commit().
 849  */
 850 int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta)
 851 {
 852         int ret;
 853
 854         if (!sta->sae || !sta->sae->tmp)
 855                 return -1;
 856
 857         if (sta->sae->state != SAE_NOTHING)
 858                 return -1;
 859
 860         ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
 861         if (ret)
 862                 return -1;
 863
 864         sta->sae->state = SAE_COMMITTED;
 865         sta->sae->sync = 0;
 866         sae_set_retransmit_timer(hapd, sta);
 867
 868         return 0;
 869 }
 870
 871 #endif /* CONFIG_SAE */
 872
 873
 874 static void handle_auth(struct hostapd_data *hapd,
 875                         const struct ieee80211_mgmt *mgmt, size_t len)
 876 {
 877         u16 auth_alg, auth_transaction, status_code;
 878         u16 resp = WLAN_STATUS_SUCCESS;
 879         struct sta_info *sta = NULL;
 880         int res;
 881         u16 fc;
 882         const u8 *challenge = NULL;
 883         u32 session_timeout, acct_interim_interval;
 884         int vlan_id = 0;
 885         struct hostapd_sta_wpa_psk_short *psk = NULL;
 886         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
 887         size_t resp_ies_len = 0;
 888         char *identity = NULL;
 889         char *radius_cui = NULL;
 890         u16 seq_ctrl;
 891
 892         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
 893                 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
 894                            (unsigned long) len);
 895                 return;
 896         }
 897
 898 #ifdef CONFIG_TESTING_OPTIONS
 899         if (hapd->iconf->ignore_auth_probability > 0.0 &&
 900             drand48() < hapd->iconf->ignore_auth_probability) {
 901                 wpa_printf(MSG_INFO,
 902                            "TESTING: ignoring auth frame from " MACSTR,
 903                            MAC2STR(mgmt->sa));
 904                 return;
 905         }
 906 #endif /* CONFIG_TESTING_OPTIONS */
 907
 908         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
 909         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
 910         status_code = le_to_host16(mgmt->u.auth.status_code);
 911         fc = le_to_host16(mgmt->frame_control);
 912         seq_ctrl = le_to_host16(mgmt->seq_ctrl);
 913
 914         if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
 915             2 + WLAN_AUTH_CHALLENGE_LEN &&
 916             mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
 917             mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
 918                 challenge = &mgmt->u.auth.variable[2];
 919
 920         wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
 921                    "auth_transaction=%d status_code=%d wep=%d%s "
 922                    "seq_ctrl=0x%x%s",
 923                    MAC2STR(mgmt->sa), auth_alg, auth_transaction,
 924                    status_code, !!(fc & WLAN_FC_ISWEP),
 925                    challenge ? " challenge" : "",
 926                    seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
 927
 928         if (hapd->tkip_countermeasures) {
 929                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 930                 goto fail;
 931         }
 932
 933         if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
 934                auth_alg == WLAN_AUTH_OPEN) ||
 935 #ifdef CONFIG_IEEE80211R
 936               (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
 937                auth_alg == WLAN_AUTH_FT) ||
 938 #endif /* CONFIG_IEEE80211R */
 939 #ifdef CONFIG_SAE
 940               (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
 941                auth_alg == WLAN_AUTH_SAE) ||
 942 #endif /* CONFIG_SAE */
 943               ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
 944                auth_alg == WLAN_AUTH_SHARED_KEY))) {
 945                 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
 946                            auth_alg);
 947                 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
 948                 goto fail;
 949         }
 950
 951         if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
 952               (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
 953                 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
 954                            auth_transaction);
 955                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 956                 goto fail;
 957         }
 958
 959         if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
 960                 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
 961                            MAC2STR(mgmt->sa));
 962                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 963                 goto fail;
 964         }
 965
 966         res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
 967                                       &session_timeout,
 968                                       &acct_interim_interval, &vlan_id,
 969                                       &psk, &identity, &radius_cui);
 970
 971         if (res == HOSTAPD_ACL_REJECT) {
 972                 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
 973                            MAC2STR(mgmt->sa));
 974                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 975                 goto fail;
 976         }
 977         if (res == HOSTAPD_ACL_PENDING) {
 978                 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
 979                            " waiting for an external authentication",
 980                            MAC2STR(mgmt->sa));
 981                 /* Authentication code will re-send the authentication frame
 982                  * after it has received (and cached) information from the
 983                  * external source. */
 984                 return;
 985         }
 986
 987         sta = ap_get_sta(hapd, mgmt->sa);
 988         if (sta) {
 989                 if ((fc & WLAN_FC_RETRY) &&
 990                     sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
 991                     sta->last_seq_ctrl == seq_ctrl &&
 992                     sta->last_subtype == WLAN_FC_STYPE_AUTH) {
 993                         hostapd_logger(hapd, sta->addr,
 994                                        HOSTAPD_MODULE_IEEE80211,
 995                                        HOSTAPD_LEVEL_DEBUG,
 996                                        "Drop repeated authentication frame seq_ctrl=0x%x",
 997                                        seq_ctrl);
 998                         return;
 999                 }
1000         } else {
1001 #ifdef CONFIG_MESH
1002                 if (hapd->conf->mesh & MESH_ENABLED) {
1003                         /* if the mesh peer is not available, we don't do auth.
1004                          */
1005                         wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
1006                                    " not yet known - drop Authentiation frame",
1007                                    MAC2STR(mgmt->sa));
1008                         /*
1009                          * Save a copy of the frame so that it can be processed
1010                          * if a new peer entry is added shortly after this.
1011                          */
1012                         wpabuf_free(hapd->mesh_pending_auth);
1013                         hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len);
1014                         os_get_reltime(&hapd->mesh_pending_auth_time);
1015                         return;
1016                 }
1017 #endif /* CONFIG_MESH */
1018
1019                 sta = ap_sta_add(hapd, mgmt->sa);
1020                 if (!sta) {
1021                         resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1022                         goto fail;
1023                 }
1024         }
1025         sta->last_seq_ctrl = seq_ctrl;
1026         sta->last_subtype = WLAN_FC_STYPE_AUTH;
1027
1028         if (vlan_id > 0) {
1029                 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) {
1030                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1031                                        HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
1032                                        "%d received from RADIUS server",
1033                                        vlan_id);
1034                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1035                         goto fail;
1036                 }
1037                 sta->vlan_id = vlan_id;
1038                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1039                                HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
1040         }
1041
1042         hostapd_free_psk_list(sta->psk);
1043         if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) {
1044                 sta->psk = psk;
1045                 psk = NULL;
1046         } else {
1047                 sta->psk = NULL;
1048         }
1049
1050         sta->identity = identity;
1051         identity = NULL;
1052         sta->radius_cui = radius_cui;
1053         radius_cui = NULL;
1054
1055         sta->flags &= ~WLAN_STA_PREAUTH;
1056         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
1057
1058         if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
1059                 sta->acct_interim_interval = acct_interim_interval;
1060         if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
1061                 ap_sta_session_timeout(hapd, sta, session_timeout);
1062         else
1063                 ap_sta_no_session_timeout(hapd, sta);
1064
1065         switch (auth_alg) {
1066         case WLAN_AUTH_OPEN:
1067                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1068                                HOSTAPD_LEVEL_DEBUG,
1069                                "authentication OK (open system)");
1070                 sta->flags |= WLAN_STA_AUTH;
1071                 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
1072                 sta->auth_alg = WLAN_AUTH_OPEN;
1073                 mlme_authenticate_indication(hapd, sta);
1074                 break;
1075         case WLAN_AUTH_SHARED_KEY:
1076                 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
1077                                        fc & WLAN_FC_ISWEP);
1078                 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
1079                 mlme_authenticate_indication(hapd, sta);
1080                 if (sta->challenge && auth_transaction == 1) {
1081                         resp_ies[0] = WLAN_EID_CHALLENGE;
1082                         resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
1083                         os_memcpy(resp_ies + 2, sta->challenge,
1084                                   WLAN_AUTH_CHALLENGE_LEN);
1085                         resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
1086                 }
1087                 break;
1088 #ifdef CONFIG_IEEE80211R
1089         case WLAN_AUTH_FT:
1090                 sta->auth_alg = WLAN_AUTH_FT;
1091                 if (sta->wpa_sm == NULL)
1092                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1093                                                         sta->addr, NULL);
1094                 if (sta->wpa_sm == NULL) {
1095                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
1096                                    "state machine");
1097                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1098                         goto fail;
1099                 }
1100                 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
1101                                     auth_transaction, mgmt->u.auth.variable,
1102                                     len - IEEE80211_HDRLEN -
1103                                     sizeof(mgmt->u.auth),
1104                                     handle_auth_ft_finish, hapd);
1105                 /* handle_auth_ft_finish() callback will complete auth. */
1106                 return;
1107 #endif /* CONFIG_IEEE80211R */
1108 #ifdef CONFIG_SAE
1109         case WLAN_AUTH_SAE:
1110 #ifdef CONFIG_MESH
1111                 if (status_code == WLAN_STATUS_SUCCESS &&
1112                     hapd->conf->mesh & MESH_ENABLED) {
1113                         if (sta->wpa_sm == NULL)
1114                                 sta->wpa_sm =
1115                                         wpa_auth_sta_init(hapd->wpa_auth,
1116                                                           sta->addr, NULL);
1117                         if (sta->wpa_sm == NULL) {
1118                                 wpa_printf(MSG_DEBUG,
1119                                            "SAE: Failed to initialize WPA state machine");
1120                                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1121                                 goto fail;
1122                         }
1123                 }
1124 #endif /* CONFIG_MESH */
1125                 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction,
1126                                 status_code);
1127                 return;
1128 #endif /* CONFIG_SAE */
1129         }
1130
1131  fail:
1132         os_free(identity);
1133         os_free(radius_cui);
1134         hostapd_free_psk_list(psk);
1135
1136         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
1137                         auth_transaction + 1, resp, resp_ies, resp_ies_len);
1138 }
1139
1140
1141 static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
1142 {
1143         int i, j = 32, aid;
1144
1145         /* get a unique AID */
1146         if (sta->aid > 0) {
1147                 wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
1148                 return 0;
1149         }
1150
1151         for (i = 0; i < AID_WORDS; i++) {
1152                 if (hapd->sta_aid[i] == (u32) -1)
1153                         continue;
1154                 for (j = 0; j < 32; j++) {
1155                         if (!(hapd->sta_aid[i] & BIT(j)))
1156                                 break;
1157                 }
1158                 if (j < 32)
1159                         break;
1160         }
1161         if (j == 32)
1162                 return -1;
1163         aid = i * 32 + j + 1;
1164         if (aid > 2007)
1165                 return -1;
1166
1167         sta->aid = aid;
1168         hapd->sta_aid[i] |= BIT(j);
1169         wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
1170         return 0;
1171 }
1172
1173
1174 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
1175                       const u8 *ssid_ie, size_t ssid_ie_len)
1176 {
1177         if (ssid_ie == NULL)
1178                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1179
1180         if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
1181             os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
1182                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1183                                HOSTAPD_LEVEL_INFO,
1184                                "Station tried to associate with unknown SSID "
1185                                "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
1186                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1187         }
1188
1189         return WLAN_STATUS_SUCCESS;
1190 }
1191
1192
1193 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
1194                      const u8 *wmm_ie, size_t wmm_ie_len)
1195 {
1196         sta->flags &= ~WLAN_STA_WMM;
1197         sta->qosinfo = 0;
1198         if (wmm_ie && hapd->conf->wmm_enabled) {
1199                 struct wmm_information_element *wmm;
1200
1201                 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) {
1202                         hostapd_logger(hapd, sta->addr,
1203                                        HOSTAPD_MODULE_WPA,
1204                                        HOSTAPD_LEVEL_DEBUG,
1205                                        "invalid WMM element in association "
1206                                        "request");
1207                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
1208                 }
1209
1210                 sta->flags |= WLAN_STA_WMM;
1211                 wmm = (struct wmm_information_element *) wmm_ie;
1212                 sta->qosinfo = wmm->qos_info;
1213         }
1214         return WLAN_STATUS_SUCCESS;
1215 }
1216
1217
1218 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
1219                            struct ieee802_11_elems *elems)
1220 {
1221         if (!elems->supp_rates) {
1222                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1223                                HOSTAPD_LEVEL_DEBUG,
1224                                "No supported rates element in AssocReq");
1225                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1226         }
1227
1228         if (elems->supp_rates_len + elems->ext_supp_rates_len >
1229             sizeof(sta->supported_rates)) {
1230                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1231                                HOSTAPD_LEVEL_DEBUG,
1232                                "Invalid supported rates element length %d+%d",
1233                                elems->supp_rates_len,
1234                                elems->ext_supp_rates_len);
1235                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1236         }
1237
1238         sta->supported_rates_len = merge_byte_arrays(
1239                 sta->supported_rates, sizeof(sta->supported_rates),
1240                 elems->supp_rates, elems->supp_rates_len,
1241                 elems->ext_supp_rates, elems->ext_supp_rates_len);
1242
1243         return WLAN_STATUS_SUCCESS;
1244 }
1245
1246
1247 static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta,
1248                            const u8 *ext_capab_ie, size_t ext_capab_ie_len)
1249 {
1250 #ifdef CONFIG_INTERWORKING
1251         /* check for QoS Map support */
1252         if (ext_capab_ie_len >= 5) {
1253                 if (ext_capab_ie[4] & 0x01)
1254                         sta->qos_map_enabled = 1;
1255         }
1256 #endif /* CONFIG_INTERWORKING */
1257
1258         return WLAN_STATUS_SUCCESS;
1259 }
1260
1261
1262 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
1263                            const u8 *ies, size_t ies_len, int reassoc)
1264 {
1265         struct ieee802_11_elems elems;
1266         u16 resp;
1267         const u8 *wpa_ie;
1268         size_t wpa_ie_len;
1269         const u8 *p2p_dev_addr = NULL;
1270
1271         if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
1272                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1273                                HOSTAPD_LEVEL_INFO, "Station sent an invalid "
1274                                "association request");
1275                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1276         }
1277
1278         resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
1279         if (resp != WLAN_STATUS_SUCCESS)
1280                 return resp;
1281         resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
1282         if (resp != WLAN_STATUS_SUCCESS)
1283                 return resp;
1284         resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len);
1285         if (resp != WLAN_STATUS_SUCCESS)
1286                 return resp;
1287         resp = copy_supp_rates(hapd, sta, &elems);
1288         if (resp != WLAN_STATUS_SUCCESS)
1289                 return resp;
1290 #ifdef CONFIG_IEEE80211N
1291         resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities);
1292         if (resp != WLAN_STATUS_SUCCESS)
1293                 return resp;
1294         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
1295             !(sta->flags & WLAN_STA_HT)) {
1296                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1297                                HOSTAPD_LEVEL_INFO, "Station does not support "
1298                                "mandatory HT PHY - reject association");
1299                 return WLAN_STATUS_ASSOC_DENIED_NO_HT;
1300         }
1301 #endif /* CONFIG_IEEE80211N */
1302
1303 #ifdef CONFIG_IEEE80211AC
1304         resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities);
1305         if (resp != WLAN_STATUS_SUCCESS)
1306                 return resp;
1307
1308         resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
1309         if (resp != WLAN_STATUS_SUCCESS)
1310                 return resp;
1311
1312         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
1313             !(sta->flags & WLAN_STA_VHT)) {
1314                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1315                                HOSTAPD_LEVEL_INFO, "Station does not support "
1316                                "mandatory VHT PHY - reject association");
1317                 return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
1318         }
1319
1320         if (hapd->conf->vendor_vht && !elems.vht_capabilities) {
1321                 resp = copy_sta_vendor_vht(hapd, sta, elems.vendor_vht,
1322                                            elems.vendor_vht_len);
1323                 if (resp != WLAN_STATUS_SUCCESS)
1324                         return resp;
1325         }
1326 #endif /* CONFIG_IEEE80211AC */
1327
1328 #ifdef CONFIG_P2P
1329         if (elems.p2p) {
1330                 wpabuf_free(sta->p2p_ie);
1331                 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
1332                                                           P2P_IE_VENDOR_TYPE);
1333                 if (sta->p2p_ie)
1334                         p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
1335         } else {
1336                 wpabuf_free(sta->p2p_ie);
1337                 sta->p2p_ie = NULL;
1338         }
1339 #endif /* CONFIG_P2P */
1340
1341         if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
1342                 wpa_ie = elems.rsn_ie;
1343                 wpa_ie_len = elems.rsn_ie_len;
1344         } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
1345                    elems.wpa_ie) {
1346                 wpa_ie = elems.wpa_ie;
1347                 wpa_ie_len = elems.wpa_ie_len;
1348         } else {
1349                 wpa_ie = NULL;
1350                 wpa_ie_len = 0;
1351         }
1352
1353 #ifdef CONFIG_WPS
1354         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
1355         if (hapd->conf->wps_state && elems.wps_ie) {
1356                 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
1357                            "Request - assume WPS is used");
1358                 sta->flags |= WLAN_STA_WPS;
1359                 wpabuf_free(sta->wps_ie);
1360                 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
1361                                                           WPS_IE_VENDOR_TYPE);
1362                 if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
1363                         wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
1364                         sta->flags |= WLAN_STA_WPS2;
1365                 }
1366                 wpa_ie = NULL;
1367                 wpa_ie_len = 0;
1368                 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
1369                         wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
1370                                    "(Re)Association Request - reject");
1371                         return WLAN_STATUS_INVALID_IE;
1372                 }
1373         } else if (hapd->conf->wps_state && wpa_ie == NULL) {
1374                 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
1375                            "(Re)Association Request - possible WPS use");
1376                 sta->flags |= WLAN_STA_MAYBE_WPS;
1377         } else
1378 #endif /* CONFIG_WPS */
1379         if (hapd->conf->wpa && wpa_ie == NULL) {
1380                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1381                                HOSTAPD_LEVEL_INFO,
1382                                "No WPA/RSN IE in association request");
1383                 return WLAN_STATUS_INVALID_IE;
1384         }
1385
1386         if (hapd->conf->wpa && wpa_ie) {
1387                 int res;
1388                 wpa_ie -= 2;
1389                 wpa_ie_len += 2;
1390                 if (sta->wpa_sm == NULL)
1391                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1392                                                         sta->addr,
1393                                                         p2p_dev_addr);
1394                 if (sta->wpa_sm == NULL) {
1395                         wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1396                                    "state machine");
1397                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
1398                 }
1399                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
1400                                           wpa_ie, wpa_ie_len,
1401                                           elems.mdie, elems.mdie_len);
1402                 if (res == WPA_INVALID_GROUP)
1403                         resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
1404                 else if (res == WPA_INVALID_PAIRWISE)
1405                         resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1406                 else if (res == WPA_INVALID_AKMP)
1407                         resp = WLAN_STATUS_AKMP_NOT_VALID;
1408                 else if (res == WPA_ALLOC_FAIL)
1409                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1410 #ifdef CONFIG_IEEE80211W
1411                 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
1412                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1413                 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
1414                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1415 #endif /* CONFIG_IEEE80211W */
1416                 else if (res == WPA_INVALID_MDIE)
1417                         resp = WLAN_STATUS_INVALID_MDIE;
1418                 else if (res != WPA_IE_OK)
1419                         resp = WLAN_STATUS_INVALID_IE;
1420                 if (resp != WLAN_STATUS_SUCCESS)
1421                         return resp;
1422 #ifdef CONFIG_IEEE80211W
1423                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1424                     sta->sa_query_count > 0)
1425                         ap_check_sa_query_timeout(hapd, sta);
1426                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1427                     (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
1428                         /*
1429                          * STA has already been associated with MFP and SA
1430                          * Query timeout has not been reached. Reject the
1431                          * association attempt temporarily and start SA Query,
1432                          * if one is not pending.
1433                          */
1434
1435                         if (sta->sa_query_count == 0)
1436                                 ap_sta_start_sa_query(hapd, sta);
1437
1438                         return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
1439                 }
1440
1441                 if (wpa_auth_uses_mfp(sta->wpa_sm))
1442                         sta->flags |= WLAN_STA_MFP;
1443                 else
1444                         sta->flags &= ~WLAN_STA_MFP;
1445 #endif /* CONFIG_IEEE80211W */
1446
1447 #ifdef CONFIG_IEEE80211R
1448                 if (sta->auth_alg == WLAN_AUTH_FT) {
1449                         if (!reassoc) {
1450                                 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
1451                                            "to use association (not "
1452                                            "re-association) with FT auth_alg",
1453                                            MAC2STR(sta->addr));
1454                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1455                         }
1456
1457                         resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
1458                                                        ies_len);
1459                         if (resp != WLAN_STATUS_SUCCESS)
1460                                 return resp;
1461                 }
1462 #endif /* CONFIG_IEEE80211R */
1463
1464 #ifdef CONFIG_SAE
1465                 if (wpa_auth_uses_sae(sta->wpa_sm) &&
1466                     sta->auth_alg == WLAN_AUTH_OPEN) {
1467                         struct rsn_pmksa_cache_entry *sa;
1468                         sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1469                         if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) {
1470                                 wpa_printf(MSG_DEBUG,
1471                                            "SAE: No PMKSA cache entry found for "
1472                                            MACSTR, MAC2STR(sta->addr));
1473                                 return WLAN_STATUS_INVALID_PMKID;
1474                         }
1475                         wpa_printf(MSG_DEBUG, "SAE: " MACSTR
1476                                    " using PMKSA caching", MAC2STR(sta->addr));
1477                 } else if (wpa_auth_uses_sae(sta->wpa_sm) &&
1478                            sta->auth_alg != WLAN_AUTH_SAE &&
1479                            !(sta->auth_alg == WLAN_AUTH_FT &&
1480                              wpa_auth_uses_ft_sae(sta->wpa_sm))) {
1481                         wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
1482                                    "SAE AKM after non-SAE auth_alg %u",
1483                                    MAC2STR(sta->addr), sta->auth_alg);
1484                         return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1485                 }
1486 #endif /* CONFIG_SAE */
1487
1488 #ifdef CONFIG_IEEE80211N
1489                 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
1490                     wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
1491                         hostapd_logger(hapd, sta->addr,
1492                                        HOSTAPD_MODULE_IEEE80211,
1493                                        HOSTAPD_LEVEL_INFO,
1494                                        "Station tried to use TKIP with HT "
1495                                        "association");
1496                         return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
1497                 }
1498 #endif /* CONFIG_IEEE80211N */
1499 #ifdef CONFIG_HS20
1500         } else if (hapd->conf->osen) {
1501                 if (elems.osen == NULL) {
1502                         hostapd_logger(
1503                                 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1504                                 HOSTAPD_LEVEL_INFO,
1505                                 "No HS 2.0 OSEN element in association request");
1506                         return WLAN_STATUS_INVALID_IE;
1507                 }
1508
1509                 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
1510                 if (sta->wpa_sm == NULL)
1511                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1512                                                         sta->addr, NULL);
1513                 if (sta->wpa_sm == NULL) {
1514                         wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1515                                    "state machine");
1516                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
1517                 }
1518                 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
1519                                       elems.osen - 2, elems.osen_len + 2) < 0)
1520                         return WLAN_STATUS_INVALID_IE;
1521 #endif /* CONFIG_HS20 */
1522         } else
1523                 wpa_auth_sta_no_wpa(sta->wpa_sm);
1524
1525 #ifdef CONFIG_P2P
1526         p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
1527 #endif /* CONFIG_P2P */
1528
1529 #ifdef CONFIG_HS20
1530         wpabuf_free(sta->hs20_ie);
1531         if (elems.hs20 && elems.hs20_len > 4) {
1532                 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
1533                                                  elems.hs20_len - 4);
1534         } else
1535                 sta->hs20_ie = NULL;
1536 #endif /* CONFIG_HS20 */
1537
1538         return WLAN_STATUS_SUCCESS;
1539 }
1540
1541
1542 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
1543                         u16 reason_code)
1544 {
1545         int send_len;
1546         struct ieee80211_mgmt reply;
1547
1548         os_memset(&reply, 0, sizeof(reply));
1549         reply.frame_control =
1550                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
1551         os_memcpy(reply.da, addr, ETH_ALEN);
1552         os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
1553         os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
1554
1555         send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
1556         reply.u.deauth.reason_code = host_to_le16(reason_code);
1557
1558         if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0)
1559                 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
1560                            strerror(errno));
1561 }
1562
1563
1564 static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
1565                             u16 status_code, int reassoc, const u8 *ies,
1566                             size_t ies_len)
1567 {
1568         int send_len;
1569         u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
1570         struct ieee80211_mgmt *reply;
1571         u8 *p;
1572
1573         os_memset(buf, 0, sizeof(buf));
1574         reply = (struct ieee80211_mgmt *) buf;
1575         reply->frame_control =
1576                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1577                              (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1578                               WLAN_FC_STYPE_ASSOC_RESP));
1579         os_memcpy(reply->da, sta->addr, ETH_ALEN);
1580         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
1581         os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
1582
1583         send_len = IEEE80211_HDRLEN;
1584         send_len += sizeof(reply->u.assoc_resp);
1585         reply->u.assoc_resp.capab_info =
1586                 host_to_le16(hostapd_own_capab_info(hapd));
1587         reply->u.assoc_resp.status_code = host_to_le16(status_code);
1588         reply->u.assoc_resp.aid = host_to_le16(sta->aid | BIT(14) | BIT(15));
1589         /* Supported rates */
1590         p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
1591         /* Extended supported rates */
1592         p = hostapd_eid_ext_supp_rates(hapd, p);
1593
1594 #ifdef CONFIG_IEEE80211R
1595         if (status_code == WLAN_STATUS_SUCCESS) {
1596                 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
1597                  * Transition Information, RSN, [RIC Response] */
1598                 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
1599                                                 buf + sizeof(buf) - p,
1600                                                 sta->auth_alg, ies, ies_len);
1601         }
1602 #endif /* CONFIG_IEEE80211R */
1603
1604 #ifdef CONFIG_IEEE80211W
1605         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
1606                 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
1607 #endif /* CONFIG_IEEE80211W */
1608
1609 #ifdef CONFIG_IEEE80211N
1610         p = hostapd_eid_ht_capabilities(hapd, p);
1611         p = hostapd_eid_ht_operation(hapd, p);
1612 #endif /* CONFIG_IEEE80211N */
1613
1614 #ifdef CONFIG_IEEE80211AC
1615         if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1616                 p = hostapd_eid_vht_capabilities(hapd, p);
1617                 p = hostapd_eid_vht_operation(hapd, p);
1618         }
1619 #endif /* CONFIG_IEEE80211AC */
1620
1621         p = hostapd_eid_ext_capab(hapd, p);
1622         p = hostapd_eid_bss_max_idle_period(hapd, p);
1623         if (sta->qos_map_enabled)
1624                 p = hostapd_eid_qos_map_set(hapd, p);
1625
1626 #ifdef CONFIG_IEEE80211AC
1627         if (hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT))
1628                 p = hostapd_eid_vendor_vht(hapd, p);
1629 #endif /* CONFIG_IEEE80211AC */
1630
1631         if (sta->flags & WLAN_STA_WMM)
1632                 p = hostapd_eid_wmm(hapd, p);
1633
1634 #ifdef CONFIG_WPS
1635         if ((sta->flags & WLAN_STA_WPS) ||
1636             ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) {
1637                 struct wpabuf *wps = wps_build_assoc_resp_ie();
1638                 if (wps) {
1639                         os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
1640                         p += wpabuf_len(wps);
1641                         wpabuf_free(wps);
1642                 }
1643         }
1644 #endif /* CONFIG_WPS */
1645
1646 #ifdef CONFIG_P2P
1647         if (sta->p2p_ie) {
1648                 struct wpabuf *p2p_resp_ie;
1649                 enum p2p_status_code status;
1650                 switch (status_code) {
1651                 case WLAN_STATUS_SUCCESS:
1652                         status = P2P_SC_SUCCESS;
1653                         break;
1654                 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
1655                         status = P2P_SC_FAIL_LIMIT_REACHED;
1656                         break;
1657                 default:
1658                         status = P2P_SC_FAIL_INVALID_PARAMS;
1659                         break;
1660                 }
1661                 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
1662                 if (p2p_resp_ie) {
1663                         os_memcpy(p, wpabuf_head(p2p_resp_ie),
1664                                   wpabuf_len(p2p_resp_ie));
1665                         p += wpabuf_len(p2p_resp_ie);
1666                         wpabuf_free(p2p_resp_ie);
1667                 }
1668         }
1669 #endif /* CONFIG_P2P */
1670
1671 #ifdef CONFIG_P2P_MANAGER
1672         if (hapd->conf->p2p & P2P_MANAGE)
1673                 p = hostapd_eid_p2p_manage(hapd, p);
1674 #endif /* CONFIG_P2P_MANAGER */
1675
1676         send_len += p - reply->u.assoc_resp.variable;
1677
1678         if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0)
1679                 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
1680                            strerror(errno));
1681 }
1682
1683
1684 static void handle_assoc(struct hostapd_data *hapd,
1685                          const struct ieee80211_mgmt *mgmt, size_t len,
1686                          int reassoc)
1687 {
1688         u16 capab_info, listen_interval, seq_ctrl, fc;
1689         u16 resp = WLAN_STATUS_SUCCESS;
1690         const u8 *pos;
1691         int left, i;
1692         struct sta_info *sta;
1693
1694         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
1695                                       sizeof(mgmt->u.assoc_req))) {
1696                 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
1697                            reassoc, (unsigned long) len);
1698                 return;
1699         }
1700
1701 #ifdef CONFIG_TESTING_OPTIONS
1702         if (reassoc) {
1703                 if (hapd->iconf->ignore_reassoc_probability > 0.0 &&
1704                     drand48() < hapd->iconf->ignore_reassoc_probability) {
1705                         wpa_printf(MSG_INFO,
1706                                    "TESTING: ignoring reassoc request from "
1707                                    MACSTR, MAC2STR(mgmt->sa));
1708                         return;
1709                 }
1710         } else {
1711                 if (hapd->iconf->ignore_assoc_probability > 0.0 &&
1712                     drand48() < hapd->iconf->ignore_assoc_probability) {
1713                         wpa_printf(MSG_INFO,
1714                                    "TESTING: ignoring assoc request from "
1715                                    MACSTR, MAC2STR(mgmt->sa));
1716                         return;
1717                 }
1718         }
1719 #endif /* CONFIG_TESTING_OPTIONS */
1720
1721         fc = le_to_host16(mgmt->frame_control);
1722         seq_ctrl = le_to_host16(mgmt->seq_ctrl);
1723
1724         if (reassoc) {
1725                 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
1726                 listen_interval = le_to_host16(
1727                         mgmt->u.reassoc_req.listen_interval);
1728                 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
1729                            " capab_info=0x%02x listen_interval=%d current_ap="
1730                            MACSTR " seq_ctrl=0x%x%s",
1731                            MAC2STR(mgmt->sa), capab_info, listen_interval,
1732                            MAC2STR(mgmt->u.reassoc_req.current_ap),
1733                            seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
1734                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
1735                 pos = mgmt->u.reassoc_req.variable;
1736         } else {
1737                 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
1738                 listen_interval = le_to_host16(
1739                         mgmt->u.assoc_req.listen_interval);
1740                 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
1741                            " capab_info=0x%02x listen_interval=%d "
1742                            "seq_ctrl=0x%x%s",
1743                            MAC2STR(mgmt->sa), capab_info, listen_interval,
1744                            seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
1745                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
1746                 pos = mgmt->u.assoc_req.variable;
1747         }
1748
1749         sta = ap_get_sta(hapd, mgmt->sa);
1750 #ifdef CONFIG_IEEE80211R
1751         if (sta && sta->auth_alg == WLAN_AUTH_FT &&
1752             (sta->flags & WLAN_STA_AUTH) == 0) {
1753                 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
1754                            "prior to authentication since it is using "
1755                            "over-the-DS FT", MAC2STR(mgmt->sa));
1756         } else
1757 #endif /* CONFIG_IEEE80211R */
1758         if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1759                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1760                                HOSTAPD_LEVEL_INFO, "Station tried to "
1761                                "associate before authentication "
1762                                "(aid=%d flags=0x%x)",
1763                                sta ? sta->aid : -1,
1764                                sta ? sta->flags : 0);
1765                 send_deauth(hapd, mgmt->sa,
1766                             WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
1767                 return;
1768         }
1769
1770         if ((fc & WLAN_FC_RETRY) &&
1771             sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
1772             sta->last_seq_ctrl == seq_ctrl &&
1773             sta->last_subtype == reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
1774             WLAN_FC_STYPE_ASSOC_REQ) {
1775                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1776                                HOSTAPD_LEVEL_DEBUG,
1777                                "Drop repeated association frame seq_ctrl=0x%x",
1778                                seq_ctrl);
1779                 return;
1780         }
1781         sta->last_seq_ctrl = seq_ctrl;
1782         sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
1783                 WLAN_FC_STYPE_ASSOC_REQ;
1784
1785         if (hapd->tkip_countermeasures) {
1786                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
1787                 goto fail;
1788         }
1789
1790         if (listen_interval > hapd->conf->max_listen_interval) {
1791                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1792                                HOSTAPD_LEVEL_DEBUG,
1793                                "Too large Listen Interval (%d)",
1794                                listen_interval);
1795                 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
1796                 goto fail;
1797         }
1798
1799         /* followed by SSID and Supported rates; and HT capabilities if 802.11n
1800          * is used */
1801         resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
1802         if (resp != WLAN_STATUS_SUCCESS)
1803                 goto fail;
1804
1805         if (hostapd_get_aid(hapd, sta) < 0) {
1806                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1807                                HOSTAPD_LEVEL_INFO, "No room for more AIDs");
1808                 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1809                 goto fail;
1810         }
1811
1812         sta->capability = capab_info;
1813         sta->listen_interval = listen_interval;
1814
1815         if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1816                 sta->flags |= WLAN_STA_NONERP;
1817         for (i = 0; i < sta->supported_rates_len; i++) {
1818                 if ((sta->supported_rates[i] & 0x7f) > 22) {
1819                         sta->flags &= ~WLAN_STA_NONERP;
1820                         break;
1821                 }
1822         }
1823         if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
1824                 sta->nonerp_set = 1;
1825                 hapd->iface->num_sta_non_erp++;
1826                 if (hapd->iface->num_sta_non_erp == 1)
1827                         ieee802_11_set_beacons(hapd->iface);
1828         }
1829
1830         if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
1831             !sta->no_short_slot_time_set) {
1832                 sta->no_short_slot_time_set = 1;
1833                 hapd->iface->num_sta_no_short_slot_time++;
1834                 if (hapd->iface->current_mode->mode ==
1835                     HOSTAPD_MODE_IEEE80211G &&
1836                     hapd->iface->num_sta_no_short_slot_time == 1)
1837                         ieee802_11_set_beacons(hapd->iface);
1838         }
1839
1840         if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1841                 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
1842         else
1843                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
1844
1845         if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
1846             !sta->no_short_preamble_set) {
1847                 sta->no_short_preamble_set = 1;
1848                 hapd->iface->num_sta_no_short_preamble++;
1849                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
1850                     && hapd->iface->num_sta_no_short_preamble == 1)
1851                         ieee802_11_set_beacons(hapd->iface);
1852         }
1853
1854 #ifdef CONFIG_IEEE80211N
1855         update_ht_state(hapd, sta);
1856 #endif /* CONFIG_IEEE80211N */
1857
1858         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1859                        HOSTAPD_LEVEL_DEBUG,
1860                        "association OK (aid %d)", sta->aid);
1861         /* Station will be marked associated, after it acknowledges AssocResp
1862          */
1863         sta->flags |= WLAN_STA_ASSOC_REQ_OK;
1864
1865 #ifdef CONFIG_IEEE80211W
1866         if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
1867                 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
1868                            "SA Query procedure", reassoc ? "re" : "");
1869                 /* TODO: Send a protected Disassociate frame to the STA using
1870                  * the old key and Reason Code "Previous Authentication no
1871                  * longer valid". Make sure this is only sent protected since
1872                  * unprotected frame would be received by the STA that is now
1873                  * trying to associate.
1874                  */
1875         }
1876 #endif /* CONFIG_IEEE80211W */
1877
1878         /* Make sure that the previously registered inactivity timer will not
1879          * remove the STA immediately. */
1880         sta->timeout_next = STA_NULLFUNC;
1881
1882  fail:
1883         send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
1884 }
1885
1886
1887 static void handle_disassoc(struct hostapd_data *hapd,
1888                             const struct ieee80211_mgmt *mgmt, size_t len)
1889 {
1890         struct sta_info *sta;
1891
1892         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1893                 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
1894                            (unsigned long) len);
1895                 return;
1896         }
1897
1898         wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1899                    MAC2STR(mgmt->sa),
1900                    le_to_host16(mgmt->u.disassoc.reason_code));
1901
1902         sta = ap_get_sta(hapd, mgmt->sa);
1903         if (sta == NULL) {
1904                 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
1905                            MAC2STR(mgmt->sa));
1906                 return;
1907         }
1908
1909         ap_sta_set_authorized(hapd, sta, 0);
1910         sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
1911         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
1912         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1913         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1914                        HOSTAPD_LEVEL_INFO, "disassociated");
1915         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1916         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1917         /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1918          * authenticated. */
1919         accounting_sta_stop(hapd, sta);
1920         ieee802_1x_free_station(sta);
1921         if (sta->ipaddr)
1922                 hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr);
1923         ap_sta_ip6addr_del(hapd, sta);
1924         hostapd_drv_sta_remove(hapd, sta->addr);
1925
1926         if (sta->timeout_next == STA_NULLFUNC ||
1927             sta->timeout_next == STA_DISASSOC) {
1928                 sta->timeout_next = STA_DEAUTH;
1929                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1930                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1931                                        hapd, sta);
1932         }
1933
1934         mlme_disassociate_indication(
1935                 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1936 }
1937
1938
1939 static void handle_deauth(struct hostapd_data *hapd,
1940                           const struct ieee80211_mgmt *mgmt, size_t len)
1941 {
1942         struct sta_info *sta;
1943
1944         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1945                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
1946                         "payload (len=%lu)", (unsigned long) len);
1947                 return;
1948         }
1949
1950         wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR
1951                 " reason_code=%d",
1952                 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
1953
1954         sta = ap_get_sta(hapd, mgmt->sa);
1955         if (sta == NULL) {
1956                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
1957                         "to deauthenticate, but it is not authenticated",
1958                         MAC2STR(mgmt->sa));
1959                 return;
1960         }
1961
1962         ap_sta_set_authorized(hapd, sta, 0);
1963         sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
1964         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1965                         WLAN_STA_ASSOC_REQ_OK);
1966         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1967         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1968                        HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1969         mlme_deauthenticate_indication(
1970                 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1971         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1972         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1973         ap_free_sta(hapd, sta);
1974 }
1975
1976
1977 static void handle_beacon(struct hostapd_data *hapd,
1978                           const struct ieee80211_mgmt *mgmt, size_t len,
1979                           struct hostapd_frame_info *fi)
1980 {
1981         struct ieee802_11_elems elems;
1982
1983         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1984                 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
1985                            (unsigned long) len);
1986                 return;
1987         }
1988
1989         (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1990                                       len - (IEEE80211_HDRLEN +
1991                                              sizeof(mgmt->u.beacon)), &elems,
1992                                       0);
1993
1994         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1995 }
1996
1997
1998 #ifdef CONFIG_IEEE80211W
1999
2000 static int hostapd_sa_query_action(struct hostapd_data *hapd,
2001                                    const struct ieee80211_mgmt *mgmt,
2002                                    size_t len)
2003 {
2004         const u8 *end;
2005
2006         end = mgmt->u.action.u.sa_query_resp.trans_id +
2007                 WLAN_SA_QUERY_TR_ID_LEN;
2008         if (((u8 *) mgmt) + len < end) {
2009                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
2010                            "frame (len=%lu)", (unsigned long) len);
2011                 return 0;
2012         }
2013
2014         ieee802_11_sa_query_action(hapd, mgmt->sa,
2015                                    mgmt->u.action.u.sa_query_resp.action,
2016                                    mgmt->u.action.u.sa_query_resp.trans_id);
2017         return 1;
2018 }
2019
2020
2021 static int robust_action_frame(u8 category)
2022 {
2023         return category != WLAN_ACTION_PUBLIC &&
2024                 category != WLAN_ACTION_HT;
2025 }
2026 #endif /* CONFIG_IEEE80211W */
2027
2028
2029 static int handle_action(struct hostapd_data *hapd,
2030                          const struct ieee80211_mgmt *mgmt, size_t len)
2031 {
2032         struct sta_info *sta;
2033         sta = ap_get_sta(hapd, mgmt->sa);
2034
2035         if (len < IEEE80211_HDRLEN + 1) {
2036                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2037                                HOSTAPD_LEVEL_DEBUG,
2038                                "handle_action - too short payload (len=%lu)",
2039                                (unsigned long) len);
2040                 return 0;
2041         }
2042
2043         if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
2044             (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2045                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
2046                            "frame (category=%u) from unassociated STA " MACSTR,
2047                            MAC2STR(mgmt->sa), mgmt->u.action.category);
2048                 return 0;
2049         }
2050
2051 #ifdef CONFIG_IEEE80211W
2052         if (sta && (sta->flags & WLAN_STA_MFP) &&
2053             !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) &&
2054             robust_action_frame(mgmt->u.action.category)) {
2055                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2056                                HOSTAPD_LEVEL_DEBUG,
2057                                "Dropped unprotected Robust Action frame from "
2058                                "an MFP STA");
2059                 return 0;
2060         }
2061 #endif /* CONFIG_IEEE80211W */
2062
2063         if (sta) {
2064                 u16 fc = le_to_host16(mgmt->frame_control);
2065                 u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
2066
2067                 if ((fc & WLAN_FC_RETRY) &&
2068                     sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
2069                     sta->last_seq_ctrl == seq_ctrl &&
2070                     sta->last_subtype == WLAN_FC_STYPE_ACTION) {
2071                         hostapd_logger(hapd, sta->addr,
2072                                        HOSTAPD_MODULE_IEEE80211,
2073                                        HOSTAPD_LEVEL_DEBUG,
2074                                        "Drop repeated action frame seq_ctrl=0x%x",
2075                                        seq_ctrl);
2076                         return 1;
2077                 }
2078
2079                 sta->last_seq_ctrl = seq_ctrl;
2080                 sta->last_subtype = WLAN_FC_STYPE_ACTION;
2081         }
2082
2083         switch (mgmt->u.action.category) {
2084 #ifdef CONFIG_IEEE80211R
2085         case WLAN_ACTION_FT:
2086                 if (!sta ||
2087                     wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
2088                                      len - IEEE80211_HDRLEN))
2089                         break;
2090                 return 1;
2091 #endif /* CONFIG_IEEE80211R */
2092         case WLAN_ACTION_WMM:
2093                 hostapd_wmm_action(hapd, mgmt, len);
2094                 return 1;
2095 #ifdef CONFIG_IEEE80211W
2096         case WLAN_ACTION_SA_QUERY:
2097                 return hostapd_sa_query_action(hapd, mgmt, len);
2098 #endif /* CONFIG_IEEE80211W */
2099 #ifdef CONFIG_WNM
2100         case WLAN_ACTION_WNM:
2101                 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
2102                 return 1;
2103 #endif /* CONFIG_WNM */
2104         case WLAN_ACTION_PUBLIC:
2105         case WLAN_ACTION_PROTECTED_DUAL:
2106 #ifdef CONFIG_IEEE80211N
2107                 if (len >= IEEE80211_HDRLEN + 2 &&
2108                     mgmt->u.action.u.public_action.action ==
2109                     WLAN_PA_20_40_BSS_COEX) {
2110                         wpa_printf(MSG_DEBUG,
2111                                    "HT20/40 coex mgmt frame received from STA "
2112                                    MACSTR, MAC2STR(mgmt->sa));
2113                         hostapd_2040_coex_action(hapd, mgmt, len);
2114                 }
2115 #endif /* CONFIG_IEEE80211N */
2116                 if (hapd->public_action_cb) {
2117                         hapd->public_action_cb(hapd->public_action_cb_ctx,
2118                                                (u8 *) mgmt, len,
2119                                                hapd->iface->freq);
2120                 }
2121                 if (hapd->public_action_cb2) {
2122                         hapd->public_action_cb2(hapd->public_action_cb2_ctx,
2123                                                 (u8 *) mgmt, len,
2124                                                 hapd->iface->freq);
2125                 }
2126                 if (hapd->public_action_cb || hapd->public_action_cb2)
2127                         return 1;
2128                 break;
2129         case WLAN_ACTION_VENDOR_SPECIFIC:
2130                 if (hapd->vendor_action_cb) {
2131                         if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
2132                                                    (u8 *) mgmt, len,
2133                                                    hapd->iface->freq) == 0)
2134                                 return 1;
2135                 }
2136                 break;
2137         }
2138
2139         hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2140                        HOSTAPD_LEVEL_DEBUG,
2141                        "handle_action - unknown action category %d or invalid "
2142                        "frame",
2143                        mgmt->u.action.category);
2144         if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
2145             !(mgmt->sa[0] & 0x01)) {
2146                 struct ieee80211_mgmt *resp;
2147
2148                 /*
2149                  * IEEE 802.11-REVma/D9.0 - 7.3.1.11
2150                  * Return the Action frame to the source without change
2151                  * except that MSB of the Category set to 1.
2152                  */
2153                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
2154                            "frame back to sender");
2155                 resp = os_malloc(len);
2156                 if (resp == NULL)
2157                         return 0;
2158                 os_memcpy(resp, mgmt, len);
2159                 os_memcpy(resp->da, resp->sa, ETH_ALEN);
2160                 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
2161                 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
2162                 resp->u.action.category |= 0x80;
2163
2164                 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) {
2165                         wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
2166                                    "Action frame");
2167                 }
2168                 os_free(resp);
2169         }
2170
2171         return 1;
2172 }
2173
2174
2175 /**
2176  * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
2177  * @hapd: hostapd BSS data structure (the BSS to which the management frame was
2178  * sent to)
2179  * @buf: management frame data (starting from IEEE 802.11 header)
2180  * @len: length of frame data in octets
2181  * @fi: meta data about received frame (signal level, etc.)
2182  *
2183  * Process all incoming IEEE 802.11 management frames. This will be called for
2184  * each frame received from the kernel driver through wlan#ap interface. In
2185  * addition, it can be called to re-inserted pending frames (e.g., when using
2186  * external RADIUS server as an MAC ACL).
2187  */
2188 int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
2189                     struct hostapd_frame_info *fi)
2190 {
2191         struct ieee80211_mgmt *mgmt;
2192         int broadcast;
2193         u16 fc, stype;
2194         int ret = 0;
2195
2196         if (len < 24)
2197                 return 0;
2198
2199         mgmt = (struct ieee80211_mgmt *) buf;
2200         fc = le_to_host16(mgmt->frame_control);
2201         stype = WLAN_FC_GET_STYPE(fc);
2202
2203         if (stype == WLAN_FC_STYPE_BEACON) {
2204                 handle_beacon(hapd, mgmt, len, fi);
2205                 return 1;
2206         }
2207
2208         broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
2209                 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
2210                 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
2211
2212         if (!broadcast &&
2213 #ifdef CONFIG_P2P
2214             /* Invitation responses can be sent with the peer MAC as BSSID */
2215             !((hapd->conf->p2p & P2P_GROUP_OWNER) &&
2216               stype == WLAN_FC_STYPE_ACTION) &&
2217 #endif /* CONFIG_P2P */
2218 #ifdef CONFIG_MESH
2219             !(hapd->conf->mesh & MESH_ENABLED) &&
2220 #endif /* CONFIG_MESH */
2221             os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
2222                 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
2223                            MAC2STR(mgmt->bssid));
2224                 return 0;
2225         }
2226
2227
2228         if (stype == WLAN_FC_STYPE_PROBE_REQ) {
2229                 handle_probe_req(hapd, mgmt, len, fi->ssi_signal);
2230                 return 1;
2231         }
2232
2233         if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
2234                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2235                                HOSTAPD_LEVEL_DEBUG,
2236                                "MGMT: DA=" MACSTR " not our address",
2237                                MAC2STR(mgmt->da));
2238                 return 0;
2239         }
2240
2241         switch (stype) {
2242         case WLAN_FC_STYPE_AUTH:
2243                 wpa_printf(MSG_DEBUG, "mgmt::auth");
2244                 handle_auth(hapd, mgmt, len);
2245                 ret = 1;
2246                 break;
2247         case WLAN_FC_STYPE_ASSOC_REQ:
2248                 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
2249                 handle_assoc(hapd, mgmt, len, 0);
2250                 ret = 1;
2251                 break;
2252         case WLAN_FC_STYPE_REASSOC_REQ:
2253                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
2254                 handle_assoc(hapd, mgmt, len, 1);
2255                 ret = 1;
2256                 break;
2257         case WLAN_FC_STYPE_DISASSOC:
2258                 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
2259                 handle_disassoc(hapd, mgmt, len);
2260                 ret = 1;
2261                 break;
2262         case WLAN_FC_STYPE_DEAUTH:
2263                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
2264                 handle_deauth(hapd, mgmt, len);
2265                 ret = 1;
2266                 break;
2267         case WLAN_FC_STYPE_ACTION:
2268                 wpa_printf(MSG_DEBUG, "mgmt::action");
2269                 ret = handle_action(hapd, mgmt, len);
2270                 break;
2271         default:
2272                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2273                                HOSTAPD_LEVEL_DEBUG,
2274                                "unknown mgmt frame subtype %d", stype);
2275                 break;
2276         }
2277
2278         return ret;
2279 }
2280
2281
2282 static void handle_auth_cb(struct hostapd_data *hapd,
2283                            const struct ieee80211_mgmt *mgmt,
2284                            size_t len, int ok)
2285 {
2286         u16 auth_alg, auth_transaction, status_code;
2287         struct sta_info *sta;
2288
2289         if (!ok) {
2290                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
2291                                HOSTAPD_LEVEL_NOTICE,
2292                                "did not acknowledge authentication response");
2293                 return;
2294         }
2295
2296         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
2297                 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
2298                            (unsigned long) len);
2299                 return;
2300         }
2301
2302         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2303         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
2304         status_code = le_to_host16(mgmt->u.auth.status_code);
2305
2306         sta = ap_get_sta(hapd, mgmt->da);
2307         if (!sta) {
2308                 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found",
2309                            MAC2STR(mgmt->da));
2310                 return;
2311         }
2312
2313         if (status_code == WLAN_STATUS_SUCCESS &&
2314             ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
2315              (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
2316                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2317                                HOSTAPD_LEVEL_INFO, "authenticated");
2318                 sta->flags |= WLAN_STA_AUTH;
2319         }
2320 }
2321
2322
2323 static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
2324                                        struct sta_info *sta,
2325                                        char *ifname_wds)
2326 {
2327         int i;
2328         struct hostapd_ssid *ssid = &hapd->conf->ssid;
2329
2330         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
2331                 return;
2332
2333         for (i = 0; i < 4; i++) {
2334                 if (ssid->wep.key[i] &&
2335                     hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
2336                                         i == ssid->wep.idx, NULL, 0,
2337                                         ssid->wep.key[i], ssid->wep.len[i])) {
2338                         wpa_printf(MSG_WARNING,
2339                                    "Could not set WEP keys for WDS interface; %s",
2340                                    ifname_wds);
2341                         break;
2342                 }
2343         }
2344 }
2345
2346
2347 static void handle_assoc_cb(struct hostapd_data *hapd,
2348                             const struct ieee80211_mgmt *mgmt,
2349                             size_t len, int reassoc, int ok)
2350 {
2351         u16 status;
2352         struct sta_info *sta;
2353         int new_assoc = 1;
2354         struct ieee80211_ht_capabilities ht_cap;
2355         struct ieee80211_vht_capabilities vht_cap;
2356
2357         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
2358                                       sizeof(mgmt->u.assoc_resp))) {
2359                 wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
2360                            reassoc, (unsigned long) len);
2361                 return;
2362         }
2363
2364         sta = ap_get_sta(hapd, mgmt->da);
2365         if (!sta) {
2366                 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
2367                            MAC2STR(mgmt->da));
2368                 return;
2369         }
2370
2371         if (!ok) {
2372                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
2373                                HOSTAPD_LEVEL_DEBUG,
2374                                "did not acknowledge association response");
2375                 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
2376                 return;
2377         }
2378
2379         if (reassoc)
2380                 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
2381         else
2382                 status = le_to_host16(mgmt->u.assoc_resp.status_code);
2383
2384         if (status != WLAN_STATUS_SUCCESS)
2385                 return;
2386
2387         /* Stop previous accounting session, if one is started, and allocate
2388          * new session id for the new session. */
2389         accounting_sta_stop(hapd, sta);
2390
2391         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2392                        HOSTAPD_LEVEL_INFO,
2393                        "associated (aid %d)",
2394                        sta->aid);
2395
2396         if (sta->flags & WLAN_STA_ASSOC)
2397                 new_assoc = 0;
2398         sta->flags |= WLAN_STA_ASSOC;
2399         sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
2400         if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) ||
2401             sta->auth_alg == WLAN_AUTH_FT) {
2402                 /*
2403                  * Open, static WEP, or FT protocol; no separate authorization
2404                  * step.
2405                  */
2406                 ap_sta_set_authorized(hapd, sta, 1);
2407         }
2408
2409         if (reassoc)
2410                 mlme_reassociate_indication(hapd, sta);
2411         else
2412                 mlme_associate_indication(hapd, sta);
2413
2414 #ifdef CONFIG_IEEE80211W
2415         sta->sa_query_timed_out = 0;
2416 #endif /* CONFIG_IEEE80211W */
2417
2418         /*
2419          * Remove the STA entry in order to make sure the STA PS state gets
2420          * cleared and configuration gets updated in case of reassociation back
2421          * to the same AP.
2422          */
2423         hostapd_drv_sta_remove(hapd, sta->addr);
2424
2425 #ifdef CONFIG_IEEE80211N
2426         if (sta->flags & WLAN_STA_HT)
2427                 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
2428 #endif /* CONFIG_IEEE80211N */
2429 #ifdef CONFIG_IEEE80211AC
2430         if (sta->flags & WLAN_STA_VHT)
2431                 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
2432 #endif /* CONFIG_IEEE80211AC */
2433
2434         if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
2435                             sta->supported_rates, sta->supported_rates_len,
2436                             sta->listen_interval,
2437                             sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
2438                             sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
2439                             sta->flags, sta->qosinfo, sta->vht_opmode)) {
2440                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2441                                HOSTAPD_LEVEL_NOTICE,
2442                                "Could not add STA to kernel driver");
2443
2444                 ap_sta_disconnect(hapd, sta, sta->addr,
2445                                   WLAN_REASON_DISASSOC_AP_BUSY);
2446
2447                 return;
2448         }
2449
2450         if (sta->flags & WLAN_STA_WDS) {
2451                 int ret;
2452                 char ifname_wds[IFNAMSIZ + 1];
2453
2454                 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
2455                                           sta->aid, 1);
2456                 if (!ret)
2457                         hostapd_set_wds_encryption(hapd, sta, ifname_wds);
2458         }
2459
2460         if (sta->eapol_sm == NULL) {
2461                 /*
2462                  * This STA does not use RADIUS server for EAP authentication,
2463                  * so bind it to the selected VLAN interface now, since the
2464                  * interface selection is not going to change anymore.
2465                  */
2466                 if (ap_sta_bind_vlan(hapd, sta) < 0)
2467                         return;
2468         } else if (sta->vlan_id) {
2469                 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
2470                 if (ap_sta_bind_vlan(hapd, sta) < 0)
2471                         return;
2472         }
2473
2474         hostapd_set_sta_flags(hapd, sta);
2475
2476         if (sta->auth_alg == WLAN_AUTH_FT)
2477                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
2478         else
2479                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
2480         hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
2481
2482         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
2483 }
2484
2485
2486 static void handle_deauth_cb(struct hostapd_data *hapd,
2487                              const struct ieee80211_mgmt *mgmt,
2488                              size_t len, int ok)
2489 {
2490         struct sta_info *sta;
2491         if (mgmt->da[0] & 0x01)
2492                 return;
2493         sta = ap_get_sta(hapd, mgmt->da);
2494         if (!sta) {
2495                 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
2496                            " not found", MAC2STR(mgmt->da));
2497                 return;
2498         }
2499         if (ok)
2500                 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
2501                            MAC2STR(sta->addr));
2502         else
2503                 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2504                            "deauth", MAC2STR(sta->addr));
2505
2506         ap_sta_deauth_cb(hapd, sta);
2507 }
2508
2509
2510 static void handle_disassoc_cb(struct hostapd_data *hapd,
2511                                const struct ieee80211_mgmt *mgmt,
2512                                size_t len, int ok)
2513 {
2514         struct sta_info *sta;
2515         if (mgmt->da[0] & 0x01)
2516                 return;
2517         sta = ap_get_sta(hapd, mgmt->da);
2518         if (!sta) {
2519                 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
2520                            " not found", MAC2STR(mgmt->da));
2521                 return;
2522         }
2523         if (ok)
2524                 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
2525                            MAC2STR(sta->addr));
2526         else
2527                 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2528                            "disassoc", MAC2STR(sta->addr));
2529
2530         ap_sta_disassoc_cb(hapd, sta);
2531 }
2532
2533
2534 /**
2535  * ieee802_11_mgmt_cb - Process management frame TX status callback
2536  * @hapd: hostapd BSS data structure (the BSS from which the management frame
2537  * was sent from)
2538  * @buf: management frame data (starting from IEEE 802.11 header)
2539  * @len: length of frame data in octets
2540  * @stype: management frame subtype from frame control field
2541  * @ok: Whether the frame was ACK'ed
2542  */
2543 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
2544                         u16 stype, int ok)
2545 {
2546         const struct ieee80211_mgmt *mgmt;
2547         mgmt = (const struct ieee80211_mgmt *) buf;
2548
2549 #ifdef CONFIG_TESTING_OPTIONS
2550         if (hapd->ext_mgmt_frame_handling) {
2551                 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d",
2552                         stype, ok);
2553                 return;
2554         }
2555 #endif /* CONFIG_TESTING_OPTIONS */
2556
2557         switch (stype) {
2558         case WLAN_FC_STYPE_AUTH:
2559                 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
2560                 handle_auth_cb(hapd, mgmt, len, ok);
2561                 break;
2562         case WLAN_FC_STYPE_ASSOC_RESP:
2563                 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
2564                 handle_assoc_cb(hapd, mgmt, len, 0, ok);
2565                 break;
2566         case WLAN_FC_STYPE_REASSOC_RESP:
2567                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
2568                 handle_assoc_cb(hapd, mgmt, len, 1, ok);
2569                 break;
2570         case WLAN_FC_STYPE_PROBE_RESP:
2571                 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb");
2572                 break;
2573         case WLAN_FC_STYPE_DEAUTH:
2574                 wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
2575                 handle_deauth_cb(hapd, mgmt, len, ok);
2576                 break;
2577         case WLAN_FC_STYPE_DISASSOC:
2578                 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
2579                 handle_disassoc_cb(hapd, mgmt, len, ok);
2580                 break;
2581         case WLAN_FC_STYPE_ACTION:
2582                 wpa_printf(MSG_DEBUG, "mgmt::action cb");
2583                 break;
2584         default:
2585                 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype);
2586                 break;
2587         }
2588 }
2589
2590
2591 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2592 {
2593         /* TODO */
2594         return 0;
2595 }
2596
2597
2598 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2599                            char *buf, size_t buflen)
2600 {
2601         /* TODO */
2602         return 0;
2603 }
2604
2605
2606 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
2607                        const u8 *buf, size_t len, int ack)
2608 {
2609         struct sta_info *sta;
2610         struct hostapd_iface *iface = hapd->iface;
2611
2612         sta = ap_get_sta(hapd, addr);
2613         if (sta == NULL && iface->num_bss > 1) {
2614                 size_t j;
2615                 for (j = 0; j < iface->num_bss; j++) {
2616                         hapd = iface->bss[j];
2617                         sta = ap_get_sta(hapd, addr);
2618                         if (sta)
2619                                 break;
2620                 }
2621         }
2622         if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))
2623                 return;
2624         if (sta->flags & WLAN_STA_PENDING_POLL) {
2625                 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
2626                            "activity poll", MAC2STR(sta->addr),
2627                            ack ? "ACKed" : "did not ACK");
2628                 if (ack)
2629                         sta->flags &= ~WLAN_STA_PENDING_POLL;
2630         }
2631
2632         ieee802_1x_tx_status(hapd, sta, buf, len, ack);
2633 }
2634
2635
2636 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
2637                              const u8 *data, size_t len, int ack)
2638 {
2639         struct sta_info *sta;
2640         struct hostapd_iface *iface = hapd->iface;
2641
2642         sta = ap_get_sta(hapd, dst);
2643         if (sta == NULL && iface->num_bss > 1) {
2644                 size_t j;
2645                 for (j = 0; j < iface->num_bss; j++) {
2646                         hapd = iface->bss[j];
2647                         sta = ap_get_sta(hapd, dst);
2648                         if (sta)
2649                                 break;
2650                 }
2651         }
2652         if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
2653                 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
2654                            MACSTR " that is not currently associated",
2655                            MAC2STR(dst));
2656                 return;
2657         }
2658
2659         ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
2660 }
2661
2662
2663 void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
2664 {
2665         struct sta_info *sta;
2666         struct hostapd_iface *iface = hapd->iface;
2667
2668         sta = ap_get_sta(hapd, addr);
2669         if (sta == NULL && iface->num_bss > 1) {
2670                 size_t j;
2671                 for (j = 0; j < iface->num_bss; j++) {
2672                         hapd = iface->bss[j];
2673                         sta = ap_get_sta(hapd, addr);
2674                         if (sta)
2675                                 break;
2676                 }
2677         }
2678         if (sta == NULL)
2679                 return;
2680         if (!(sta->flags & WLAN_STA_PENDING_POLL))
2681                 return;
2682
2683         wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
2684                    "activity poll", MAC2STR(sta->addr));
2685         sta->flags &= ~WLAN_STA_PENDING_POLL;
2686 }
2687
2688
2689 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
2690                                 int wds)
2691 {
2692         struct sta_info *sta;
2693
2694         sta = ap_get_sta(hapd, src);
2695         if (sta && (sta->flags & WLAN_STA_ASSOC)) {
2696                 if (!hapd->conf->wds_sta)
2697                         return;
2698
2699                 if (wds && !(sta->flags & WLAN_STA_WDS)) {
2700                         int ret;
2701                         char ifname_wds[IFNAMSIZ + 1];
2702
2703                         wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
2704                                    "STA " MACSTR " (aid %u)",
2705                                    MAC2STR(sta->addr), sta->aid);
2706                         sta->flags |= WLAN_STA_WDS;
2707                         ret = hostapd_set_wds_sta(hapd, ifname_wds,
2708                                                   sta->addr, sta->aid, 1);
2709                         if (!ret)
2710                                 hostapd_set_wds_encryption(hapd, sta,
2711                                                            ifname_wds);
2712                 }
2713                 return;
2714         }
2715
2716         wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
2717                    MACSTR, MAC2STR(src));
2718         if (src[0] & 0x01) {
2719                 /* Broadcast bit set in SA?! Ignore the frame silently. */
2720                 return;
2721         }
2722
2723         if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
2724                 wpa_printf(MSG_DEBUG, "Association Response to the STA has "
2725                            "already been sent, but no TX status yet known - "
2726                            "ignore Class 3 frame issue with " MACSTR,
2727                            MAC2STR(src));
2728                 return;
2729         }
2730
2731         if (sta && (sta->flags & WLAN_STA_AUTH))
2732                 hostapd_drv_sta_disassoc(
2733                         hapd, src,
2734                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
2735         else
2736                 hostapd_drv_sta_deauth(
2737                         hapd, src,
2738                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
2739 }
2740
2741
2742 #endif /* CONFIG_NATIVE_WINDOWS */