src/ap/ieee802_11.c

   1 /*
   2  * hostapd / IEEE 802.11 Management
   3  * Copyright (c) 2002-2013, 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 "wmm.h"
  33 #include "ap_list.h"
  34 #include "accounting.h"
  35 #include "ap_config.h"
  36 #include "ap_mlme.h"
  37 #include "p2p_hostapd.h"
  38 #include "ap_drv_ops.h"
  39 #include "wnm_ap.h"
  40 #include "ieee802_11.h"
  41 #include "dfs.h"
  42
  43
  44 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
  45 {
  46         u8 *pos = eid;
  47         int i, num, count;
  48
  49         if (hapd->iface->current_rates == NULL)
  50                 return eid;
  51
  52         *pos++ = WLAN_EID_SUPP_RATES;
  53         num = hapd->iface->num_rates;
  54         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
  55                 num++;
  56         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
  57                 num++;
  58         if (num > 8) {
  59                 /* rest of the rates are encoded in Extended supported
  60                  * rates element */
  61                 num = 8;
  62         }
  63
  64         *pos++ = num;
  65         count = 0;
  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         count = 0;
 109         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
 110              i++) {
 111                 count++;
 112                 if (count <= 8)
 113                         continue; /* already in SuppRates IE */
 114                 *pos = hapd->iface->current_rates[i].rate / 5;
 115                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
 116                         *pos |= 0x80;
 117                 pos++;
 118         }
 119
 120         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
 121                 count++;
 122                 if (count > 8)
 123                         *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
 124         }
 125
 126         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
 127                 count++;
 128                 if (count > 8)
 129                         *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
 130         }
 131
 132         return pos;
 133 }
 134
 135
 136 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
 137                            int probe)
 138 {
 139         int capab = WLAN_CAPABILITY_ESS;
 140         int privacy;
 141         int dfs;
 142
 143         /* Check if any of configured channels require DFS */
 144         dfs = hostapd_is_dfs_required(hapd->iface);
 145         if (dfs < 0) {
 146                 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
 147                            dfs);
 148                 dfs = 0;
 149         }
 150
 151         if (hapd->iface->num_sta_no_short_preamble == 0 &&
 152             hapd->iconf->preamble == SHORT_PREAMBLE)
 153                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 154
 155         privacy = hapd->conf->ssid.wep.keys_set;
 156
 157         if (hapd->conf->ieee802_1x &&
 158             (hapd->conf->default_wep_key_len ||
 159              hapd->conf->individual_wep_key_len))
 160                 privacy = 1;
 161
 162         if (hapd->conf->wpa)
 163                 privacy = 1;
 164
 165 #ifdef CONFIG_HS20
 166         if (hapd->conf->osen)
 167                 privacy = 1;
 168 #endif /* CONFIG_HS20 */
 169
 170         if (sta) {
 171                 int policy, def_klen;
 172                 if (probe && sta->ssid_probe) {
 173                         policy = sta->ssid_probe->security_policy;
 174                         def_klen = sta->ssid_probe->wep.default_len;
 175                 } else {
 176                         policy = sta->ssid->security_policy;
 177                         def_klen = sta->ssid->wep.default_len;
 178                 }
 179                 privacy = policy != SECURITY_PLAINTEXT;
 180                 if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
 181                         privacy = 0;
 182         }
 183
 184         if (privacy)
 185                 capab |= WLAN_CAPABILITY_PRIVACY;
 186
 187         if (hapd->iface->current_mode &&
 188             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
 189             hapd->iface->num_sta_no_short_slot_time == 0)
 190                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 191
 192         /*
 193          * Currently, Spectrum Management capability bit is set when directly
 194          * requested in configuration by spectrum_mgmt_required or when AP is
 195          * running on DFS channel.
 196          * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
 197          */
 198         if (hapd->iface->current_mode &&
 199             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
 200             (hapd->iconf->spectrum_mgmt_required || dfs))
 201                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 202
 203         return capab;
 204 }
 205
 206
 207 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
 208                            u16 auth_transaction, const u8 *challenge,
 209                            int iswep)
 210 {
 211         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 212                        HOSTAPD_LEVEL_DEBUG,
 213                        "authentication (shared key, transaction %d)",
 214                        auth_transaction);
 215
 216         if (auth_transaction == 1) {
 217                 if (!sta->challenge) {
 218                         /* Generate a pseudo-random challenge */
 219                         u8 key[8];
 220                         struct os_time now;
 221                         int r;
 222                         sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
 223                         if (sta->challenge == NULL)
 224                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 225
 226                         os_get_time(&now);
 227                         r = os_random();
 228                         os_memcpy(key, &now.sec, 4);
 229                         os_memcpy(key + 4, &r, 4);
 230                         rc4_skip(key, sizeof(key), 0,
 231                                  sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
 232                 }
 233                 return 0;
 234         }
 235
 236         if (auth_transaction != 3)
 237                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 238
 239         /* Transaction 3 */
 240         if (!iswep || !sta->challenge || !challenge ||
 241             os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
 242                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 243                                HOSTAPD_LEVEL_INFO,
 244                                "shared key authentication - invalid "
 245                                "challenge-response");
 246                 return WLAN_STATUS_CHALLENGE_FAIL;
 247         }
 248
 249         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 250                        HOSTAPD_LEVEL_DEBUG,
 251                        "authentication OK (shared key)");
 252         sta->flags |= WLAN_STA_AUTH;
 253         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 254         os_free(sta->challenge);
 255         sta->challenge = NULL;
 256
 257         return 0;
 258 }
 259
 260
 261 static void send_auth_reply(struct hostapd_data *hapd,
 262                             const u8 *dst, const u8 *bssid,
 263                             u16 auth_alg, u16 auth_transaction, u16 resp,
 264                             const u8 *ies, size_t ies_len)
 265 {
 266         struct ieee80211_mgmt *reply;
 267         u8 *buf;
 268         size_t rlen;
 269
 270         rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
 271         buf = os_zalloc(rlen);
 272         if (buf == NULL)
 273                 return;
 274
 275         reply = (struct ieee80211_mgmt *) buf;
 276         reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 277                                             WLAN_FC_STYPE_AUTH);
 278         os_memcpy(reply->da, dst, ETH_ALEN);
 279         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
 280         os_memcpy(reply->bssid, bssid, ETH_ALEN);
 281
 282         reply->u.auth.auth_alg = host_to_le16(auth_alg);
 283         reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
 284         reply->u.auth.status_code = host_to_le16(resp);
 285
 286         if (ies && ies_len)
 287                 os_memcpy(reply->u.auth.variable, ies, ies_len);
 288
 289         wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
 290                    " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
 291                    MAC2STR(dst), auth_alg, auth_transaction,
 292                    resp, (unsigned long) ies_len);
 293         if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0)
 294                 wpa_printf(MSG_INFO, "send_auth_reply: send");
 295
 296         os_free(buf);
 297 }
 298
 299
 300 #ifdef CONFIG_IEEE80211R
 301 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
 302                                   u16 auth_transaction, u16 status,
 303                                   const u8 *ies, size_t ies_len)
 304 {
 305         struct hostapd_data *hapd = ctx;
 306         struct sta_info *sta;
 307
 308         send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
 309                         status, ies, ies_len);
 310
 311         if (status != WLAN_STATUS_SUCCESS)
 312                 return;
 313
 314         sta = ap_get_sta(hapd, dst);
 315         if (sta == NULL)
 316                 return;
 317
 318         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
 319                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
 320         sta->flags |= WLAN_STA_AUTH;
 321         mlme_authenticate_indication(hapd, sta);
 322 }
 323 #endif /* CONFIG_IEEE80211R */
 324
 325
 326 #ifdef CONFIG_SAE
 327
 328 static struct wpabuf * auth_process_sae_commit(struct hostapd_data *hapd,
 329                                                struct sta_info *sta)
 330 {
 331         struct wpabuf *buf;
 332
 333         if (hapd->conf->ssid.wpa_passphrase == NULL) {
 334                 wpa_printf(MSG_DEBUG, "SAE: No password available");
 335                 return NULL;
 336         }
 337
 338         if (sae_prepare_commit(hapd->own_addr, sta->addr,
 339                                (u8 *) hapd->conf->ssid.wpa_passphrase,
 340                                os_strlen(hapd->conf->ssid.wpa_passphrase),
 341                                sta->sae) < 0) {
 342                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
 343                 return NULL;
 344         }
 345
 346         if (sae_process_commit(sta->sae) < 0) {
 347                 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer commit");
 348                 return NULL;
 349         }
 350
 351         buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN);
 352         if (buf == NULL)
 353                 return NULL;
 354         sae_write_commit(sta->sae, buf, NULL);
 355
 356         return buf;
 357 }
 358
 359
 360 static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
 361                                               struct sta_info *sta)
 362 {
 363         struct wpabuf *buf;
 364
 365         buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
 366         if (buf == NULL)
 367                 return NULL;
 368
 369         sae_write_confirm(sta->sae, buf);
 370
 371         return buf;
 372 }
 373
 374
 375 static int use_sae_anti_clogging(struct hostapd_data *hapd)
 376 {
 377         struct sta_info *sta;
 378         unsigned int open = 0;
 379
 380         if (hapd->conf->sae_anti_clogging_threshold == 0)
 381                 return 1;
 382
 383         for (sta = hapd->sta_list; sta; sta = sta->next) {
 384                 if (!sta->sae)
 385                         continue;
 386                 if (sta->sae->state != SAE_COMMITTED &&
 387                     sta->sae->state != SAE_CONFIRMED)
 388                         continue;
 389                 open++;
 390                 if (open >= hapd->conf->sae_anti_clogging_threshold)
 391                         return 1;
 392         }
 393
 394         return 0;
 395 }
 396
 397
 398 static int check_sae_token(struct hostapd_data *hapd, const u8 *addr,
 399                            const u8 *token, size_t token_len)
 400 {
 401         u8 mac[SHA256_MAC_LEN];
 402
 403         if (token_len != SHA256_MAC_LEN)
 404                 return -1;
 405         if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
 406                         addr, ETH_ALEN, mac) < 0 ||
 407             os_memcmp(token, mac, SHA256_MAC_LEN) != 0)
 408                 return -1;
 409
 410         return 0;
 411 }
 412
 413
 414 static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
 415                                             const u8 *addr)
 416 {
 417         struct wpabuf *buf;
 418         u8 *token;
 419         struct os_reltime now;
 420
 421         os_get_reltime(&now);
 422         if (!os_reltime_initialized(&hapd->last_sae_token_key_update) ||
 423             os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) {
 424                 if (random_get_bytes(hapd->sae_token_key,
 425                                      sizeof(hapd->sae_token_key)) < 0)
 426                         return NULL;
 427                 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key",
 428                             hapd->sae_token_key, sizeof(hapd->sae_token_key));
 429                 hapd->last_sae_token_key_update = now;
 430         }
 431
 432         buf = wpabuf_alloc(SHA256_MAC_LEN);
 433         if (buf == NULL)
 434                 return NULL;
 435
 436         token = wpabuf_put(buf, SHA256_MAC_LEN);
 437         hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
 438                     addr, ETH_ALEN, token);
 439
 440         return buf;
 441 }
 442
 443
 444 static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
 445                             const struct ieee80211_mgmt *mgmt, size_t len,
 446                             u8 auth_transaction)
 447 {
 448         u16 resp = WLAN_STATUS_SUCCESS;
 449         struct wpabuf *data = NULL;
 450
 451         if (!sta->sae) {
 452                 if (auth_transaction != 1)
 453                         return;
 454                 sta->sae = os_zalloc(sizeof(*sta->sae));
 455                 if (sta->sae == NULL)
 456                         return;
 457                 sta->sae->state = SAE_NOTHING;
 458         }
 459
 460         if (auth_transaction == 1) {
 461                 const u8 *token = NULL;
 462                 size_t token_len = 0;
 463                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 464                                HOSTAPD_LEVEL_DEBUG,
 465                                "start SAE authentication (RX commit)");
 466                 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
 467                                         ((const u8 *) mgmt) + len -
 468                                         mgmt->u.auth.variable, &token,
 469                                         &token_len, hapd->conf->sae_groups);
 470                 if (token && check_sae_token(hapd, sta->addr, token, token_len)
 471                     < 0) {
 472                         wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
 473                                    "incorrect token from " MACSTR,
 474                                    MAC2STR(sta->addr));
 475                         return;
 476                 }
 477
 478                 if (resp == WLAN_STATUS_SUCCESS) {
 479                         if (!token && use_sae_anti_clogging(hapd)) {
 480                                 wpa_printf(MSG_DEBUG, "SAE: Request anti-"
 481                                            "clogging token from " MACSTR,
 482                                            MAC2STR(sta->addr));
 483                                 data = auth_build_token_req(hapd, sta->addr);
 484                                 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
 485                         } else {
 486                                 data = auth_process_sae_commit(hapd, sta);
 487                                 if (data == NULL)
 488                                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 489                                 else
 490                                         sta->sae->state = SAE_COMMITTED;
 491                         }
 492                 }
 493         } else if (auth_transaction == 2) {
 494                 if (sta->sae->state != SAE_COMMITTED) {
 495                         hostapd_logger(hapd, sta->addr,
 496                                        HOSTAPD_MODULE_IEEE80211,
 497                                        HOSTAPD_LEVEL_DEBUG,
 498                                        "SAE confirm before commit");
 499                         resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 500                         goto failed;
 501                 }
 502                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 503                                HOSTAPD_LEVEL_DEBUG,
 504                                "SAE authentication (RX confirm)");
 505                 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable,
 506                                        ((u8 *) mgmt) + len -
 507                                        mgmt->u.auth.variable) < 0) {
 508                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 509                 } else {
 510                         resp = WLAN_STATUS_SUCCESS;
 511                         sta->flags |= WLAN_STA_AUTH;
 512                         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 513                         sta->auth_alg = WLAN_AUTH_SAE;
 514                         mlme_authenticate_indication(hapd, sta);
 515
 516                         data = auth_build_sae_confirm(hapd, sta);
 517                         if (data == NULL)
 518                                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 519                         else {
 520                                 sta->sae->state = SAE_ACCEPTED;
 521                                 sae_clear_temp_data(sta->sae);
 522                         }
 523                 }
 524         } else {
 525                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 526                                HOSTAPD_LEVEL_DEBUG,
 527                                "unexpected SAE authentication transaction %u",
 528                                auth_transaction);
 529                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 530         }
 531
 532 failed:
 533         sta->auth_alg = WLAN_AUTH_SAE;
 534
 535         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
 536                         auth_transaction, resp,
 537                         data ? wpabuf_head(data) : (u8 *) "",
 538                         data ? wpabuf_len(data) : 0);
 539         wpabuf_free(data);
 540 }
 541 #endif /* CONFIG_SAE */
 542
 543
 544 static void handle_auth(struct hostapd_data *hapd,
 545                         const struct ieee80211_mgmt *mgmt, size_t len)
 546 {
 547         u16 auth_alg, auth_transaction, status_code;
 548         u16 resp = WLAN_STATUS_SUCCESS;
 549         struct sta_info *sta = NULL;
 550         int res;
 551         u16 fc;
 552         const u8 *challenge = NULL;
 553         u32 session_timeout, acct_interim_interval;
 554         int vlan_id = 0;
 555         struct hostapd_sta_wpa_psk_short *psk = NULL;
 556         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
 557         size_t resp_ies_len = 0;
 558         char *identity = NULL;
 559         char *radius_cui = NULL;
 560
 561         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
 562                 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
 563                            (unsigned long) len);
 564                 return;
 565         }
 566
 567 #ifdef CONFIG_TESTING_OPTIONS
 568         if (hapd->iconf->ignore_auth_probability > 0.0d &&
 569             drand48() < hapd->iconf->ignore_auth_probability) {
 570                 wpa_printf(MSG_INFO,
 571                            "TESTING: ignoring auth frame from " MACSTR,
 572                            MAC2STR(mgmt->sa));
 573                 return;
 574         }
 575 #endif /* CONFIG_TESTING_OPTIONS */
 576
 577         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
 578         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
 579         status_code = le_to_host16(mgmt->u.auth.status_code);
 580         fc = le_to_host16(mgmt->frame_control);
 581
 582         if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
 583             2 + WLAN_AUTH_CHALLENGE_LEN &&
 584             mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
 585             mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
 586                 challenge = &mgmt->u.auth.variable[2];
 587
 588         wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
 589                    "auth_transaction=%d status_code=%d wep=%d%s",
 590                    MAC2STR(mgmt->sa), auth_alg, auth_transaction,
 591                    status_code, !!(fc & WLAN_FC_ISWEP),
 592                    challenge ? " challenge" : "");
 593
 594         if (hapd->tkip_countermeasures) {
 595                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 596                 goto fail;
 597         }
 598
 599         if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
 600                auth_alg == WLAN_AUTH_OPEN) ||
 601 #ifdef CONFIG_IEEE80211R
 602               (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
 603                auth_alg == WLAN_AUTH_FT) ||
 604 #endif /* CONFIG_IEEE80211R */
 605 #ifdef CONFIG_SAE
 606               (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
 607                auth_alg == WLAN_AUTH_SAE) ||
 608 #endif /* CONFIG_SAE */
 609               ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
 610                auth_alg == WLAN_AUTH_SHARED_KEY))) {
 611                 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
 612                            auth_alg);
 613                 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
 614                 goto fail;
 615         }
 616
 617         if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
 618               (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
 619                 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
 620                            auth_transaction);
 621                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 622                 goto fail;
 623         }
 624
 625         if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
 626                 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
 627                            MAC2STR(mgmt->sa));
 628                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 629                 goto fail;
 630         }
 631
 632         res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
 633                                       &session_timeout,
 634                                       &acct_interim_interval, &vlan_id,
 635                                       &psk, &identity, &radius_cui);
 636
 637         if (res == HOSTAPD_ACL_REJECT) {
 638                 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
 639                            MAC2STR(mgmt->sa));
 640                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 641                 goto fail;
 642         }
 643         if (res == HOSTAPD_ACL_PENDING) {
 644                 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
 645                            " waiting for an external authentication",
 646                            MAC2STR(mgmt->sa));
 647                 /* Authentication code will re-send the authentication frame
 648                  * after it has received (and cached) information from the
 649                  * external source. */
 650                 return;
 651         }
 652
 653         sta = ap_sta_add(hapd, mgmt->sa);
 654         if (!sta) {
 655                 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
 656                 goto fail;
 657         }
 658
 659         if (vlan_id > 0) {
 660                 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) {
 661                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 662                                        HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
 663                                        "%d received from RADIUS server",
 664                                        vlan_id);
 665                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 666                         goto fail;
 667                 }
 668                 sta->vlan_id = vlan_id;
 669                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 670                                HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
 671         }
 672
 673         hostapd_free_psk_list(sta->psk);
 674         if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) {
 675                 sta->psk = psk;
 676                 psk = NULL;
 677         } else {
 678                 sta->psk = NULL;
 679         }
 680
 681         sta->identity = identity;
 682         identity = NULL;
 683         sta->radius_cui = radius_cui;
 684         radius_cui = NULL;
 685
 686         sta->flags &= ~WLAN_STA_PREAUTH;
 687         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
 688
 689         if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
 690                 sta->acct_interim_interval = acct_interim_interval;
 691         if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
 692                 ap_sta_session_timeout(hapd, sta, session_timeout);
 693         else
 694                 ap_sta_no_session_timeout(hapd, sta);
 695
 696         switch (auth_alg) {
 697         case WLAN_AUTH_OPEN:
 698                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 699                                HOSTAPD_LEVEL_DEBUG,
 700                                "authentication OK (open system)");
 701                 sta->flags |= WLAN_STA_AUTH;
 702                 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 703                 sta->auth_alg = WLAN_AUTH_OPEN;
 704                 mlme_authenticate_indication(hapd, sta);
 705                 break;
 706         case WLAN_AUTH_SHARED_KEY:
 707                 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
 708                                        fc & WLAN_FC_ISWEP);
 709                 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
 710                 mlme_authenticate_indication(hapd, sta);
 711                 if (sta->challenge && auth_transaction == 1) {
 712                         resp_ies[0] = WLAN_EID_CHALLENGE;
 713                         resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
 714                         os_memcpy(resp_ies + 2, sta->challenge,
 715                                   WLAN_AUTH_CHALLENGE_LEN);
 716                         resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
 717                 }
 718                 break;
 719 #ifdef CONFIG_IEEE80211R
 720         case WLAN_AUTH_FT:
 721                 sta->auth_alg = WLAN_AUTH_FT;
 722                 if (sta->wpa_sm == NULL)
 723                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 724                                                         sta->addr, NULL);
 725                 if (sta->wpa_sm == NULL) {
 726                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
 727                                    "state machine");
 728                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 729                         goto fail;
 730                 }
 731                 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
 732                                     auth_transaction, mgmt->u.auth.variable,
 733                                     len - IEEE80211_HDRLEN -
 734                                     sizeof(mgmt->u.auth),
 735                                     handle_auth_ft_finish, hapd);
 736                 /* handle_auth_ft_finish() callback will complete auth. */
 737                 return;
 738 #endif /* CONFIG_IEEE80211R */
 739 #ifdef CONFIG_SAE
 740         case WLAN_AUTH_SAE:
 741                 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction);
 742                 return;
 743 #endif /* CONFIG_SAE */
 744         }
 745
 746  fail:
 747         os_free(identity);
 748         os_free(radius_cui);
 749         hostapd_free_psk_list(psk);
 750
 751         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
 752                         auth_transaction + 1, resp, resp_ies, resp_ies_len);
 753 }
 754
 755
 756 static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
 757 {
 758         int i, j = 32, aid;
 759
 760         /* get a unique AID */
 761         if (sta->aid > 0) {
 762                 wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
 763                 return 0;
 764         }
 765
 766         for (i = 0; i < AID_WORDS; i++) {
 767                 if (hapd->sta_aid[i] == (u32) -1)
 768                         continue;
 769                 for (j = 0; j < 32; j++) {
 770                         if (!(hapd->sta_aid[i] & BIT(j)))
 771                                 break;
 772                 }
 773                 if (j < 32)
 774                         break;
 775         }
 776         if (j == 32)
 777                 return -1;
 778         aid = i * 32 + j + 1;
 779         if (aid > 2007)
 780                 return -1;
 781
 782         sta->aid = aid;
 783         hapd->sta_aid[i] |= BIT(j);
 784         wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
 785         return 0;
 786 }
 787
 788
 789 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
 790                       const u8 *ssid_ie, size_t ssid_ie_len)
 791 {
 792         if (ssid_ie == NULL)
 793                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 794
 795         if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
 796             os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
 797                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 798                                HOSTAPD_LEVEL_INFO,
 799                                "Station tried to associate with unknown SSID "
 800                                "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
 801                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 802         }
 803
 804         return WLAN_STATUS_SUCCESS;
 805 }
 806
 807
 808 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
 809                      const u8 *wmm_ie, size_t wmm_ie_len)
 810 {
 811         sta->flags &= ~WLAN_STA_WMM;
 812         sta->qosinfo = 0;
 813         if (wmm_ie && hapd->conf->wmm_enabled) {
 814                 struct wmm_information_element *wmm;
 815
 816                 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) {
 817                         hostapd_logger(hapd, sta->addr,
 818                                        HOSTAPD_MODULE_WPA,
 819                                        HOSTAPD_LEVEL_DEBUG,
 820                                        "invalid WMM element in association "
 821                                        "request");
 822                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
 823                 }
 824
 825                 sta->flags |= WLAN_STA_WMM;
 826                 wmm = (struct wmm_information_element *) wmm_ie;
 827                 sta->qosinfo = wmm->qos_info;
 828         }
 829         return WLAN_STATUS_SUCCESS;
 830 }
 831
 832
 833 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
 834                            struct ieee802_11_elems *elems)
 835 {
 836         if (!elems->supp_rates) {
 837                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 838                                HOSTAPD_LEVEL_DEBUG,
 839                                "No supported rates element in AssocReq");
 840                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 841         }
 842
 843         if (elems->supp_rates_len + elems->ext_supp_rates_len >
 844             sizeof(sta->supported_rates)) {
 845                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 846                                HOSTAPD_LEVEL_DEBUG,
 847                                "Invalid supported rates element length %d+%d",
 848                                elems->supp_rates_len,
 849                                elems->ext_supp_rates_len);
 850                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 851         }
 852
 853         sta->supported_rates_len = merge_byte_arrays(
 854                 sta->supported_rates, sizeof(sta->supported_rates),
 855                 elems->supp_rates, elems->supp_rates_len,
 856                 elems->ext_supp_rates, elems->ext_supp_rates_len);
 857
 858         return WLAN_STATUS_SUCCESS;
 859 }
 860
 861
 862 static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta,
 863                            const u8 *ext_capab_ie, size_t ext_capab_ie_len)
 864 {
 865 #ifdef CONFIG_INTERWORKING
 866         /* check for QoS Map support */
 867         if (ext_capab_ie_len >= 5) {
 868                 if (ext_capab_ie[4] & 0x01)
 869                         sta->qos_map_enabled = 1;
 870         }
 871 #endif /* CONFIG_INTERWORKING */
 872
 873         return WLAN_STATUS_SUCCESS;
 874 }
 875
 876
 877 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
 878                            const u8 *ies, size_t ies_len, int reassoc)
 879 {
 880         struct ieee802_11_elems elems;
 881         u16 resp;
 882         const u8 *wpa_ie;
 883         size_t wpa_ie_len;
 884         const u8 *p2p_dev_addr = NULL;
 885
 886         if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
 887                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 888                                HOSTAPD_LEVEL_INFO, "Station sent an invalid "
 889                                "association request");
 890                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 891         }
 892
 893         resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
 894         if (resp != WLAN_STATUS_SUCCESS)
 895                 return resp;
 896         resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
 897         if (resp != WLAN_STATUS_SUCCESS)
 898                 return resp;
 899         resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len);
 900         if (resp != WLAN_STATUS_SUCCESS)
 901                 return resp;
 902         resp = copy_supp_rates(hapd, sta, &elems);
 903         if (resp != WLAN_STATUS_SUCCESS)
 904                 return resp;
 905 #ifdef CONFIG_IEEE80211N
 906         resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities,
 907                                  elems.ht_capabilities_len);
 908         if (resp != WLAN_STATUS_SUCCESS)
 909                 return resp;
 910         if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
 911             !(sta->flags & WLAN_STA_HT)) {
 912                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 913                                HOSTAPD_LEVEL_INFO, "Station does not support "
 914                                "mandatory HT PHY - reject association");
 915                 return WLAN_STATUS_ASSOC_DENIED_NO_HT;
 916         }
 917 #endif /* CONFIG_IEEE80211N */
 918
 919 #ifdef CONFIG_IEEE80211AC
 920         resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities,
 921                                   elems.vht_capabilities_len);
 922         if (resp != WLAN_STATUS_SUCCESS)
 923                 return resp;
 924
 925         resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
 926         if (resp != WLAN_STATUS_SUCCESS)
 927                 return resp;
 928
 929         if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
 930             !(sta->flags & WLAN_STA_VHT)) {
 931                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 932                                HOSTAPD_LEVEL_INFO, "Station does not support "
 933                                "mandatory VHT PHY - reject association");
 934                 return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
 935         }
 936 #endif /* CONFIG_IEEE80211AC */
 937
 938 #ifdef CONFIG_P2P
 939         if (elems.p2p) {
 940                 wpabuf_free(sta->p2p_ie);
 941                 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
 942                                                           P2P_IE_VENDOR_TYPE);
 943                 if (sta->p2p_ie)
 944                         p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
 945         } else {
 946                 wpabuf_free(sta->p2p_ie);
 947                 sta->p2p_ie = NULL;
 948         }
 949 #endif /* CONFIG_P2P */
 950
 951         if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
 952                 wpa_ie = elems.rsn_ie;
 953                 wpa_ie_len = elems.rsn_ie_len;
 954         } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
 955                    elems.wpa_ie) {
 956                 wpa_ie = elems.wpa_ie;
 957                 wpa_ie_len = elems.wpa_ie_len;
 958         } else {
 959                 wpa_ie = NULL;
 960                 wpa_ie_len = 0;
 961         }
 962
 963 #ifdef CONFIG_WPS
 964         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
 965         if (hapd->conf->wps_state && elems.wps_ie) {
 966                 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
 967                            "Request - assume WPS is used");
 968                 sta->flags |= WLAN_STA_WPS;
 969                 wpabuf_free(sta->wps_ie);
 970                 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
 971                                                           WPS_IE_VENDOR_TYPE);
 972                 if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
 973                         wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
 974                         sta->flags |= WLAN_STA_WPS2;
 975                 }
 976                 wpa_ie = NULL;
 977                 wpa_ie_len = 0;
 978                 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
 979                         wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
 980                                    "(Re)Association Request - reject");
 981                         return WLAN_STATUS_INVALID_IE;
 982                 }
 983         } else if (hapd->conf->wps_state && wpa_ie == NULL) {
 984                 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
 985                            "(Re)Association Request - possible WPS use");
 986                 sta->flags |= WLAN_STA_MAYBE_WPS;
 987         } else
 988 #endif /* CONFIG_WPS */
 989         if (hapd->conf->wpa && wpa_ie == NULL) {
 990                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 991                                HOSTAPD_LEVEL_INFO,
 992                                "No WPA/RSN IE in association request");
 993                 return WLAN_STATUS_INVALID_IE;
 994         }
 995
 996         if (hapd->conf->wpa && wpa_ie) {
 997                 int res;
 998                 wpa_ie -= 2;
 999                 wpa_ie_len += 2;
1000                 if (sta->wpa_sm == NULL)
1001                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1002                                                         sta->addr,
1003                                                         p2p_dev_addr);
1004                 if (sta->wpa_sm == NULL) {
1005                         wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1006                                    "state machine");
1007                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
1008                 }
1009                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
1010                                           wpa_ie, wpa_ie_len,
1011                                           elems.mdie, elems.mdie_len);
1012                 if (res == WPA_INVALID_GROUP)
1013                         resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
1014                 else if (res == WPA_INVALID_PAIRWISE)
1015                         resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1016                 else if (res == WPA_INVALID_AKMP)
1017                         resp = WLAN_STATUS_AKMP_NOT_VALID;
1018                 else if (res == WPA_ALLOC_FAIL)
1019                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1020 #ifdef CONFIG_IEEE80211W
1021                 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
1022                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1023                 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
1024                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1025 #endif /* CONFIG_IEEE80211W */
1026                 else if (res == WPA_INVALID_MDIE)
1027                         resp = WLAN_STATUS_INVALID_MDIE;
1028                 else if (res != WPA_IE_OK)
1029                         resp = WLAN_STATUS_INVALID_IE;
1030                 if (resp != WLAN_STATUS_SUCCESS)
1031                         return resp;
1032 #ifdef CONFIG_IEEE80211W
1033                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1034                     sta->sa_query_count > 0)
1035                         ap_check_sa_query_timeout(hapd, sta);
1036                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1037                     (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
1038                         /*
1039                          * STA has already been associated with MFP and SA
1040                          * Query timeout has not been reached. Reject the
1041                          * association attempt temporarily and start SA Query,
1042                          * if one is not pending.
1043                          */
1044
1045                         if (sta->sa_query_count == 0)
1046                                 ap_sta_start_sa_query(hapd, sta);
1047
1048                         return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
1049                 }
1050
1051                 if (wpa_auth_uses_mfp(sta->wpa_sm))
1052                         sta->flags |= WLAN_STA_MFP;
1053                 else
1054                         sta->flags &= ~WLAN_STA_MFP;
1055 #endif /* CONFIG_IEEE80211W */
1056
1057 #ifdef CONFIG_IEEE80211R
1058                 if (sta->auth_alg == WLAN_AUTH_FT) {
1059                         if (!reassoc) {
1060                                 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
1061                                            "to use association (not "
1062                                            "re-association) with FT auth_alg",
1063                                            MAC2STR(sta->addr));
1064                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1065                         }
1066
1067                         resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
1068                                                        ies_len);
1069                         if (resp != WLAN_STATUS_SUCCESS)
1070                                 return resp;
1071                 }
1072 #endif /* CONFIG_IEEE80211R */
1073
1074 #ifdef CONFIG_SAE
1075                 if (wpa_auth_uses_sae(sta->wpa_sm) &&
1076                     sta->auth_alg != WLAN_AUTH_SAE &&
1077                     !(sta->auth_alg == WLAN_AUTH_FT &&
1078                       wpa_auth_uses_ft_sae(sta->wpa_sm))) {
1079                         wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
1080                                    "SAE AKM after non-SAE auth_alg %u",
1081                                    MAC2STR(sta->addr), sta->auth_alg);
1082                         return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1083                 }
1084 #endif /* CONFIG_SAE */
1085
1086 #ifdef CONFIG_IEEE80211N
1087                 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
1088                     wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
1089                         hostapd_logger(hapd, sta->addr,
1090                                        HOSTAPD_MODULE_IEEE80211,
1091                                        HOSTAPD_LEVEL_INFO,
1092                                        "Station tried to use TKIP with HT "
1093                                        "association");
1094                         return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
1095                 }
1096 #endif /* CONFIG_IEEE80211N */
1097 #ifdef CONFIG_HS20
1098         } else if (hapd->conf->osen) {
1099                 if (elems.osen == NULL) {
1100                         hostapd_logger(
1101                                 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1102                                 HOSTAPD_LEVEL_INFO,
1103                                 "No HS 2.0 OSEN element in association request");
1104                         return WLAN_STATUS_INVALID_IE;
1105                 }
1106
1107                 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
1108                 if (sta->wpa_sm == NULL)
1109                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1110                                                         sta->addr, NULL);
1111                 if (sta->wpa_sm == NULL) {
1112                         wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1113                                    "state machine");
1114                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
1115                 }
1116                 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
1117                                       elems.osen - 2, elems.osen_len + 2) < 0)
1118                         return WLAN_STATUS_INVALID_IE;
1119 #endif /* CONFIG_HS20 */
1120         } else
1121                 wpa_auth_sta_no_wpa(sta->wpa_sm);
1122
1123 #ifdef CONFIG_P2P
1124         p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
1125 #endif /* CONFIG_P2P */
1126
1127 #ifdef CONFIG_HS20
1128         wpabuf_free(sta->hs20_ie);
1129         if (elems.hs20 && elems.hs20_len > 4) {
1130                 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
1131                                                  elems.hs20_len - 4);
1132         } else
1133                 sta->hs20_ie = NULL;
1134 #endif /* CONFIG_HS20 */
1135
1136         return WLAN_STATUS_SUCCESS;
1137 }
1138
1139
1140 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
1141                         u16 reason_code)
1142 {
1143         int send_len;
1144         struct ieee80211_mgmt reply;
1145
1146         os_memset(&reply, 0, sizeof(reply));
1147         reply.frame_control =
1148                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
1149         os_memcpy(reply.da, addr, ETH_ALEN);
1150         os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
1151         os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
1152
1153         send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
1154         reply.u.deauth.reason_code = host_to_le16(reason_code);
1155
1156         if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0)
1157                 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
1158                            strerror(errno));
1159 }
1160
1161
1162 static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
1163                             u16 status_code, int reassoc, const u8 *ies,
1164                             size_t ies_len)
1165 {
1166         int send_len;
1167         u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
1168         struct ieee80211_mgmt *reply;
1169         u8 *p;
1170
1171         os_memset(buf, 0, sizeof(buf));
1172         reply = (struct ieee80211_mgmt *) buf;
1173         reply->frame_control =
1174                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1175                              (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1176                               WLAN_FC_STYPE_ASSOC_RESP));
1177         os_memcpy(reply->da, sta->addr, ETH_ALEN);
1178         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
1179         os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
1180
1181         send_len = IEEE80211_HDRLEN;
1182         send_len += sizeof(reply->u.assoc_resp);
1183         reply->u.assoc_resp.capab_info =
1184                 host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
1185         reply->u.assoc_resp.status_code = host_to_le16(status_code);
1186         reply->u.assoc_resp.aid = host_to_le16(sta->aid | BIT(14) | BIT(15));
1187         /* Supported rates */
1188         p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
1189         /* Extended supported rates */
1190         p = hostapd_eid_ext_supp_rates(hapd, p);
1191
1192 #ifdef CONFIG_IEEE80211R
1193         if (status_code == WLAN_STATUS_SUCCESS) {
1194                 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
1195                  * Transition Information, RSN, [RIC Response] */
1196                 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
1197                                                 buf + sizeof(buf) - p,
1198                                                 sta->auth_alg, ies, ies_len);
1199         }
1200 #endif /* CONFIG_IEEE80211R */
1201
1202 #ifdef CONFIG_IEEE80211W
1203         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
1204                 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
1205 #endif /* CONFIG_IEEE80211W */
1206
1207 #ifdef CONFIG_IEEE80211N
1208         p = hostapd_eid_ht_capabilities(hapd, p);
1209         p = hostapd_eid_ht_operation(hapd, p);
1210 #endif /* CONFIG_IEEE80211N */
1211
1212 #ifdef CONFIG_IEEE80211AC
1213         p = hostapd_eid_vht_capabilities(hapd, p);
1214         p = hostapd_eid_vht_operation(hapd, p);
1215 #endif /* CONFIG_IEEE80211AC */
1216
1217         p = hostapd_eid_ext_capab(hapd, p);
1218         p = hostapd_eid_bss_max_idle_period(hapd, p);
1219         if (sta->qos_map_enabled)
1220                 p = hostapd_eid_qos_map_set(hapd, p);
1221
1222         if (sta->flags & WLAN_STA_WMM)
1223                 p = hostapd_eid_wmm(hapd, p);
1224
1225 #ifdef CONFIG_WPS
1226         if ((sta->flags & WLAN_STA_WPS) ||
1227             ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) {
1228                 struct wpabuf *wps = wps_build_assoc_resp_ie();
1229                 if (wps) {
1230                         os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
1231                         p += wpabuf_len(wps);
1232                         wpabuf_free(wps);
1233                 }
1234         }
1235 #endif /* CONFIG_WPS */
1236
1237 #ifdef CONFIG_P2P
1238         if (sta->p2p_ie) {
1239                 struct wpabuf *p2p_resp_ie;
1240                 enum p2p_status_code status;
1241                 switch (status_code) {
1242                 case WLAN_STATUS_SUCCESS:
1243                         status = P2P_SC_SUCCESS;
1244                         break;
1245                 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
1246                         status = P2P_SC_FAIL_LIMIT_REACHED;
1247                         break;
1248                 default:
1249                         status = P2P_SC_FAIL_INVALID_PARAMS;
1250                         break;
1251                 }
1252                 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
1253                 if (p2p_resp_ie) {
1254                         os_memcpy(p, wpabuf_head(p2p_resp_ie),
1255                                   wpabuf_len(p2p_resp_ie));
1256                         p += wpabuf_len(p2p_resp_ie);
1257                         wpabuf_free(p2p_resp_ie);
1258                 }
1259         }
1260 #endif /* CONFIG_P2P */
1261
1262 #ifdef CONFIG_P2P_MANAGER
1263         if (hapd->conf->p2p & P2P_MANAGE)
1264                 p = hostapd_eid_p2p_manage(hapd, p);
1265 #endif /* CONFIG_P2P_MANAGER */
1266
1267         send_len += p - reply->u.assoc_resp.variable;
1268
1269         if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0)
1270                 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
1271                            strerror(errno));
1272 }
1273
1274
1275 static void handle_assoc(struct hostapd_data *hapd,
1276                          const struct ieee80211_mgmt *mgmt, size_t len,
1277                          int reassoc)
1278 {
1279         u16 capab_info, listen_interval;
1280         u16 resp = WLAN_STATUS_SUCCESS;
1281         const u8 *pos;
1282         int left, i;
1283         struct sta_info *sta;
1284
1285         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
1286                                       sizeof(mgmt->u.assoc_req))) {
1287                 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
1288                            reassoc, (unsigned long) len);
1289                 return;
1290         }
1291
1292 #ifdef CONFIG_TESTING_OPTIONS
1293         if (reassoc) {
1294                 if (hapd->iconf->ignore_reassoc_probability > 0.0d &&
1295                     drand48() < hapd->iconf->ignore_reassoc_probability) {
1296                         wpa_printf(MSG_INFO,
1297                                    "TESTING: ignoring reassoc request from "
1298                                    MACSTR, MAC2STR(mgmt->sa));
1299                         return;
1300                 }
1301         } else {
1302                 if (hapd->iconf->ignore_assoc_probability > 0.0d &&
1303                     drand48() < hapd->iconf->ignore_assoc_probability) {
1304                         wpa_printf(MSG_INFO,
1305                                    "TESTING: ignoring assoc request from "
1306                                    MACSTR, MAC2STR(mgmt->sa));
1307                         return;
1308                 }
1309         }
1310 #endif /* CONFIG_TESTING_OPTIONS */
1311
1312         if (reassoc) {
1313                 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
1314                 listen_interval = le_to_host16(
1315                         mgmt->u.reassoc_req.listen_interval);
1316                 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
1317                            " capab_info=0x%02x listen_interval=%d current_ap="
1318                            MACSTR,
1319                            MAC2STR(mgmt->sa), capab_info, listen_interval,
1320                            MAC2STR(mgmt->u.reassoc_req.current_ap));
1321                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
1322                 pos = mgmt->u.reassoc_req.variable;
1323         } else {
1324                 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
1325                 listen_interval = le_to_host16(
1326                         mgmt->u.assoc_req.listen_interval);
1327                 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
1328                            " capab_info=0x%02x listen_interval=%d",
1329                            MAC2STR(mgmt->sa), capab_info, listen_interval);
1330                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
1331                 pos = mgmt->u.assoc_req.variable;
1332         }
1333
1334         sta = ap_get_sta(hapd, mgmt->sa);
1335 #ifdef CONFIG_IEEE80211R
1336         if (sta && sta->auth_alg == WLAN_AUTH_FT &&
1337             (sta->flags & WLAN_STA_AUTH) == 0) {
1338                 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
1339                            "prior to authentication since it is using "
1340                            "over-the-DS FT", MAC2STR(mgmt->sa));
1341         } else
1342 #endif /* CONFIG_IEEE80211R */
1343         if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1344                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1345                                HOSTAPD_LEVEL_INFO, "Station tried to "
1346                                "associate before authentication "
1347                                "(aid=%d flags=0x%x)",
1348                                sta ? sta->aid : -1,
1349                                sta ? sta->flags : 0);
1350                 send_deauth(hapd, mgmt->sa,
1351                             WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
1352                 return;
1353         }
1354
1355         if (hapd->tkip_countermeasures) {
1356                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
1357                 goto fail;
1358         }
1359
1360         if (listen_interval > hapd->conf->max_listen_interval) {
1361                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1362                                HOSTAPD_LEVEL_DEBUG,
1363                                "Too large Listen Interval (%d)",
1364                                listen_interval);
1365                 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
1366                 goto fail;
1367         }
1368
1369         /* followed by SSID and Supported rates; and HT capabilities if 802.11n
1370          * is used */
1371         resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
1372         if (resp != WLAN_STATUS_SUCCESS)
1373                 goto fail;
1374
1375         if (hostapd_get_aid(hapd, sta) < 0) {
1376                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1377                                HOSTAPD_LEVEL_INFO, "No room for more AIDs");
1378                 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1379                 goto fail;
1380         }
1381
1382         sta->capability = capab_info;
1383         sta->listen_interval = listen_interval;
1384
1385         if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1386                 sta->flags |= WLAN_STA_NONERP;
1387         for (i = 0; i < sta->supported_rates_len; i++) {
1388                 if ((sta->supported_rates[i] & 0x7f) > 22) {
1389                         sta->flags &= ~WLAN_STA_NONERP;
1390                         break;
1391                 }
1392         }
1393         if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
1394                 sta->nonerp_set = 1;
1395                 hapd->iface->num_sta_non_erp++;
1396                 if (hapd->iface->num_sta_non_erp == 1)
1397                         ieee802_11_set_beacons(hapd->iface);
1398         }
1399
1400         if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
1401             !sta->no_short_slot_time_set) {
1402                 sta->no_short_slot_time_set = 1;
1403                 hapd->iface->num_sta_no_short_slot_time++;
1404                 if (hapd->iface->current_mode->mode ==
1405                     HOSTAPD_MODE_IEEE80211G &&
1406                     hapd->iface->num_sta_no_short_slot_time == 1)
1407                         ieee802_11_set_beacons(hapd->iface);
1408         }
1409
1410         if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1411                 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
1412         else
1413                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
1414
1415         if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
1416             !sta->no_short_preamble_set) {
1417                 sta->no_short_preamble_set = 1;
1418                 hapd->iface->num_sta_no_short_preamble++;
1419                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
1420                     && hapd->iface->num_sta_no_short_preamble == 1)
1421                         ieee802_11_set_beacons(hapd->iface);
1422         }
1423
1424 #ifdef CONFIG_IEEE80211N
1425         update_ht_state(hapd, sta);
1426 #endif /* CONFIG_IEEE80211N */
1427
1428         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1429                        HOSTAPD_LEVEL_DEBUG,
1430                        "association OK (aid %d)", sta->aid);
1431         /* Station will be marked associated, after it acknowledges AssocResp
1432          */
1433         sta->flags |= WLAN_STA_ASSOC_REQ_OK;
1434
1435 #ifdef CONFIG_IEEE80211W
1436         if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
1437                 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
1438                            "SA Query procedure", reassoc ? "re" : "");
1439                 /* TODO: Send a protected Disassociate frame to the STA using
1440                  * the old key and Reason Code "Previous Authentication no
1441                  * longer valid". Make sure this is only sent protected since
1442                  * unprotected frame would be received by the STA that is now
1443                  * trying to associate.
1444                  */
1445         }
1446 #endif /* CONFIG_IEEE80211W */
1447
1448         /* Make sure that the previously registered inactivity timer will not
1449          * remove the STA immediately. */
1450         sta->timeout_next = STA_NULLFUNC;
1451
1452  fail:
1453         send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
1454 }
1455
1456
1457 static void handle_disassoc(struct hostapd_data *hapd,
1458                             const struct ieee80211_mgmt *mgmt, size_t len)
1459 {
1460         struct sta_info *sta;
1461
1462         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1463                 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
1464                            (unsigned long) len);
1465                 return;
1466         }
1467
1468         wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1469                    MAC2STR(mgmt->sa),
1470                    le_to_host16(mgmt->u.disassoc.reason_code));
1471
1472         sta = ap_get_sta(hapd, mgmt->sa);
1473         if (sta == NULL) {
1474                 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
1475                            MAC2STR(mgmt->sa));
1476                 return;
1477         }
1478
1479         ap_sta_set_authorized(hapd, sta, 0);
1480         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
1481         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1482         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1483                        HOSTAPD_LEVEL_INFO, "disassociated");
1484         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1485         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1486         /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1487          * authenticated. */
1488         accounting_sta_stop(hapd, sta);
1489         ieee802_1x_free_station(sta);
1490         hostapd_drv_sta_remove(hapd, sta->addr);
1491
1492         if (sta->timeout_next == STA_NULLFUNC ||
1493             sta->timeout_next == STA_DISASSOC) {
1494                 sta->timeout_next = STA_DEAUTH;
1495                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1496                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1497                                        hapd, sta);
1498         }
1499
1500         mlme_disassociate_indication(
1501                 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1502 }
1503
1504
1505 static void handle_deauth(struct hostapd_data *hapd,
1506                           const struct ieee80211_mgmt *mgmt, size_t len)
1507 {
1508         struct sta_info *sta;
1509
1510         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1511                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
1512                         "payload (len=%lu)", (unsigned long) len);
1513                 return;
1514         }
1515
1516         wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR
1517                 " reason_code=%d",
1518                 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
1519
1520         sta = ap_get_sta(hapd, mgmt->sa);
1521         if (sta == NULL) {
1522                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
1523                         "to deauthenticate, but it is not authenticated",
1524                         MAC2STR(mgmt->sa));
1525                 return;
1526         }
1527
1528         ap_sta_set_authorized(hapd, sta, 0);
1529         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1530                         WLAN_STA_ASSOC_REQ_OK);
1531         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1532         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1533                        HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1534         mlme_deauthenticate_indication(
1535                 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1536         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1537         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1538         ap_free_sta(hapd, sta);
1539 }
1540
1541
1542 static void handle_beacon(struct hostapd_data *hapd,
1543                           const struct ieee80211_mgmt *mgmt, size_t len,
1544                           struct hostapd_frame_info *fi)
1545 {
1546         struct ieee802_11_elems elems;
1547
1548         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1549                 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
1550                            (unsigned long) len);
1551                 return;
1552         }
1553
1554         (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1555                                       len - (IEEE80211_HDRLEN +
1556                                              sizeof(mgmt->u.beacon)), &elems,
1557                                       0);
1558
1559         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1560 }
1561
1562
1563 #ifdef CONFIG_IEEE80211W
1564
1565 static int hostapd_sa_query_action(struct hostapd_data *hapd,
1566                                    const struct ieee80211_mgmt *mgmt,
1567                                    size_t len)
1568 {
1569         const u8 *end;
1570
1571         end = mgmt->u.action.u.sa_query_resp.trans_id +
1572                 WLAN_SA_QUERY_TR_ID_LEN;
1573         if (((u8 *) mgmt) + len < end) {
1574                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
1575                            "frame (len=%lu)", (unsigned long) len);
1576                 return 0;
1577         }
1578
1579         ieee802_11_sa_query_action(hapd, mgmt->sa,
1580                                    mgmt->u.action.u.sa_query_resp.action,
1581                                    mgmt->u.action.u.sa_query_resp.trans_id);
1582         return 1;
1583 }
1584
1585
1586 static int robust_action_frame(u8 category)
1587 {
1588         return category != WLAN_ACTION_PUBLIC &&
1589                 category != WLAN_ACTION_HT;
1590 }
1591 #endif /* CONFIG_IEEE80211W */
1592
1593
1594 static int handle_action(struct hostapd_data *hapd,
1595                          const struct ieee80211_mgmt *mgmt, size_t len)
1596 {
1597         struct sta_info *sta;
1598         sta = ap_get_sta(hapd, mgmt->sa);
1599
1600         if (len < IEEE80211_HDRLEN + 1) {
1601                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1602                                HOSTAPD_LEVEL_DEBUG,
1603                                "handle_action - too short payload (len=%lu)",
1604                                (unsigned long) len);
1605                 return 0;
1606         }
1607
1608         if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
1609             (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
1610                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
1611                            "frame (category=%u) from unassociated STA " MACSTR,
1612                            MAC2STR(mgmt->sa), mgmt->u.action.category);
1613                 return 0;
1614         }
1615
1616 #ifdef CONFIG_IEEE80211W
1617         if (sta && (sta->flags & WLAN_STA_MFP) &&
1618             !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) &&
1619             robust_action_frame(mgmt->u.action.category)) {
1620                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1621                                HOSTAPD_LEVEL_DEBUG,
1622                                "Dropped unprotected Robust Action frame from "
1623                                "an MFP STA");
1624                 return 0;
1625         }
1626 #endif /* CONFIG_IEEE80211W */
1627
1628         switch (mgmt->u.action.category) {
1629 #ifdef CONFIG_IEEE80211R
1630         case WLAN_ACTION_FT:
1631                 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
1632                                      len - IEEE80211_HDRLEN))
1633                         break;
1634                 return 1;
1635 #endif /* CONFIG_IEEE80211R */
1636         case WLAN_ACTION_WMM:
1637                 hostapd_wmm_action(hapd, mgmt, len);
1638                 return 1;
1639 #ifdef CONFIG_IEEE80211W
1640         case WLAN_ACTION_SA_QUERY:
1641                 return hostapd_sa_query_action(hapd, mgmt, len);
1642 #endif /* CONFIG_IEEE80211W */
1643 #ifdef CONFIG_WNM
1644         case WLAN_ACTION_WNM:
1645                 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
1646                 return 1;
1647 #endif /* CONFIG_WNM */
1648         case WLAN_ACTION_PUBLIC:
1649         case WLAN_ACTION_PROTECTED_DUAL:
1650                 if (hapd->public_action_cb) {
1651                         hapd->public_action_cb(hapd->public_action_cb_ctx,
1652                                                (u8 *) mgmt, len,
1653                                                hapd->iface->freq);
1654                 }
1655                 if (hapd->public_action_cb2) {
1656                         hapd->public_action_cb2(hapd->public_action_cb2_ctx,
1657                                                 (u8 *) mgmt, len,
1658                                                 hapd->iface->freq);
1659                 }
1660                 if (hapd->public_action_cb || hapd->public_action_cb2)
1661                         return 1;
1662                 break;
1663         case WLAN_ACTION_VENDOR_SPECIFIC:
1664                 if (hapd->vendor_action_cb) {
1665                         if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
1666                                                    (u8 *) mgmt, len,
1667                                                    hapd->iface->freq) == 0)
1668                                 return 1;
1669                 }
1670                 break;
1671         }
1672
1673         hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1674                        HOSTAPD_LEVEL_DEBUG,
1675                        "handle_action - unknown action category %d or invalid "
1676                        "frame",
1677                        mgmt->u.action.category);
1678         if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
1679             !(mgmt->sa[0] & 0x01)) {
1680                 struct ieee80211_mgmt *resp;
1681
1682                 /*
1683                  * IEEE 802.11-REVma/D9.0 - 7.3.1.11
1684                  * Return the Action frame to the source without change
1685                  * except that MSB of the Category set to 1.
1686                  */
1687                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
1688                            "frame back to sender");
1689                 resp = os_malloc(len);
1690                 if (resp == NULL)
1691                         return 0;
1692                 os_memcpy(resp, mgmt, len);
1693                 os_memcpy(resp->da, resp->sa, ETH_ALEN);
1694                 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
1695                 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
1696                 resp->u.action.category |= 0x80;
1697
1698                 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) {
1699                         wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
1700                                    "Action frame");
1701                 }
1702                 os_free(resp);
1703         }
1704
1705         return 1;
1706 }
1707
1708
1709 /**
1710  * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
1711  * @hapd: hostapd BSS data structure (the BSS to which the management frame was
1712  * sent to)
1713  * @buf: management frame data (starting from IEEE 802.11 header)
1714  * @len: length of frame data in octets
1715  * @fi: meta data about received frame (signal level, etc.)
1716  *
1717  * Process all incoming IEEE 802.11 management frames. This will be called for
1718  * each frame received from the kernel driver through wlan#ap interface. In
1719  * addition, it can be called to re-inserted pending frames (e.g., when using
1720  * external RADIUS server as an MAC ACL).
1721  */
1722 int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
1723                     struct hostapd_frame_info *fi)
1724 {
1725         struct ieee80211_mgmt *mgmt;
1726         int broadcast;
1727         u16 fc, stype;
1728         int ret = 0;
1729
1730         if (len < 24)
1731                 return 0;
1732
1733         mgmt = (struct ieee80211_mgmt *) buf;
1734         fc = le_to_host16(mgmt->frame_control);
1735         stype = WLAN_FC_GET_STYPE(fc);
1736
1737         if (stype == WLAN_FC_STYPE_BEACON) {
1738                 handle_beacon(hapd, mgmt, len, fi);
1739                 return 1;
1740         }
1741
1742         broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
1743                 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
1744                 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
1745
1746         if (!broadcast &&
1747 #ifdef CONFIG_P2P
1748             /* Invitation responses can be sent with the peer MAC as BSSID */
1749             !((hapd->conf->p2p & P2P_GROUP_OWNER) &&
1750               stype == WLAN_FC_STYPE_ACTION) &&
1751 #endif /* CONFIG_P2P */
1752             os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
1753                 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
1754                            MAC2STR(mgmt->bssid));
1755                 return 0;
1756         }
1757
1758
1759         if (stype == WLAN_FC_STYPE_PROBE_REQ) {
1760                 handle_probe_req(hapd, mgmt, len, fi->ssi_signal);
1761                 return 1;
1762         }
1763
1764         if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
1765                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1766                                HOSTAPD_LEVEL_DEBUG,
1767                                "MGMT: DA=" MACSTR " not our address",
1768                                MAC2STR(mgmt->da));
1769                 return 0;
1770         }
1771
1772         switch (stype) {
1773         case WLAN_FC_STYPE_AUTH:
1774                 wpa_printf(MSG_DEBUG, "mgmt::auth");
1775                 handle_auth(hapd, mgmt, len);
1776                 ret = 1;
1777                 break;
1778         case WLAN_FC_STYPE_ASSOC_REQ:
1779                 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
1780                 handle_assoc(hapd, mgmt, len, 0);
1781                 ret = 1;
1782                 break;
1783         case WLAN_FC_STYPE_REASSOC_REQ:
1784                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
1785                 handle_assoc(hapd, mgmt, len, 1);
1786                 ret = 1;
1787                 break;
1788         case WLAN_FC_STYPE_DISASSOC:
1789                 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
1790                 handle_disassoc(hapd, mgmt, len);
1791                 ret = 1;
1792                 break;
1793         case WLAN_FC_STYPE_DEAUTH:
1794                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
1795                 handle_deauth(hapd, mgmt, len);
1796                 ret = 1;
1797                 break;
1798         case WLAN_FC_STYPE_ACTION:
1799                 wpa_printf(MSG_DEBUG, "mgmt::action");
1800                 ret = handle_action(hapd, mgmt, len);
1801                 break;
1802         default:
1803                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1804                                HOSTAPD_LEVEL_DEBUG,
1805                                "unknown mgmt frame subtype %d", stype);
1806                 break;
1807         }
1808
1809         return ret;
1810 }
1811
1812
1813 static void handle_auth_cb(struct hostapd_data *hapd,
1814                            const struct ieee80211_mgmt *mgmt,
1815                            size_t len, int ok)
1816 {
1817         u16 auth_alg, auth_transaction, status_code;
1818         struct sta_info *sta;
1819
1820         if (!ok) {
1821                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1822                                HOSTAPD_LEVEL_NOTICE,
1823                                "did not acknowledge authentication response");
1824                 return;
1825         }
1826
1827         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
1828                 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
1829                            (unsigned long) len);
1830                 return;
1831         }
1832
1833         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1834         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
1835         status_code = le_to_host16(mgmt->u.auth.status_code);
1836
1837         sta = ap_get_sta(hapd, mgmt->da);
1838         if (!sta) {
1839                 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found",
1840                            MAC2STR(mgmt->da));
1841                 return;
1842         }
1843
1844         if (status_code == WLAN_STATUS_SUCCESS &&
1845             ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
1846              (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
1847                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1848                                HOSTAPD_LEVEL_INFO, "authenticated");
1849                 sta->flags |= WLAN_STA_AUTH;
1850         }
1851 }
1852
1853
1854 static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
1855                                        struct sta_info *sta,
1856                                        char *ifname_wds)
1857 {
1858         int i;
1859         struct hostapd_ssid *ssid = sta->ssid;
1860
1861         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
1862                 return;
1863
1864         for (i = 0; i < 4; i++) {
1865                 if (ssid->wep.key[i] &&
1866                     hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
1867                                         i == ssid->wep.idx, NULL, 0,
1868                                         ssid->wep.key[i], ssid->wep.len[i])) {
1869                         wpa_printf(MSG_WARNING,
1870                                    "Could not set WEP keys for WDS interface; %s",
1871                                    ifname_wds);
1872                         break;
1873                 }
1874         }
1875 }
1876
1877
1878 static void handle_assoc_cb(struct hostapd_data *hapd,
1879                             const struct ieee80211_mgmt *mgmt,
1880                             size_t len, int reassoc, int ok)
1881 {
1882         u16 status;
1883         struct sta_info *sta;
1884         int new_assoc = 1;
1885         struct ieee80211_ht_capabilities ht_cap;
1886         struct ieee80211_vht_capabilities vht_cap;
1887
1888         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
1889                                       sizeof(mgmt->u.assoc_resp))) {
1890                 wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
1891                            reassoc, (unsigned long) len);
1892                 return;
1893         }
1894
1895         sta = ap_get_sta(hapd, mgmt->da);
1896         if (!sta) {
1897                 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
1898                            MAC2STR(mgmt->da));
1899                 return;
1900         }
1901
1902         if (!ok) {
1903                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1904                                HOSTAPD_LEVEL_DEBUG,
1905                                "did not acknowledge association response");
1906                 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
1907                 return;
1908         }
1909
1910         if (reassoc)
1911                 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
1912         else
1913                 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1914
1915         if (status != WLAN_STATUS_SUCCESS)
1916                 return;
1917
1918         /* Stop previous accounting session, if one is started, and allocate
1919          * new session id for the new session. */
1920         accounting_sta_stop(hapd, sta);
1921
1922         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1923                        HOSTAPD_LEVEL_INFO,
1924                        "associated (aid %d)",
1925                        sta->aid);
1926
1927         if (sta->flags & WLAN_STA_ASSOC)
1928                 new_assoc = 0;
1929         sta->flags |= WLAN_STA_ASSOC;
1930         sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
1931         if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) ||
1932             sta->auth_alg == WLAN_AUTH_FT) {
1933                 /*
1934                  * Open, static WEP, or FT protocol; no separate authorization
1935                  * step.
1936                  */
1937                 ap_sta_set_authorized(hapd, sta, 1);
1938         }
1939
1940         if (reassoc)
1941                 mlme_reassociate_indication(hapd, sta);
1942         else
1943                 mlme_associate_indication(hapd, sta);
1944
1945 #ifdef CONFIG_IEEE80211W
1946         sta->sa_query_timed_out = 0;
1947 #endif /* CONFIG_IEEE80211W */
1948
1949         /*
1950          * Remove the STA entry in order to make sure the STA PS state gets
1951          * cleared and configuration gets updated in case of reassociation back
1952          * to the same AP.
1953          */
1954         hostapd_drv_sta_remove(hapd, sta->addr);
1955
1956 #ifdef CONFIG_IEEE80211N
1957         if (sta->flags & WLAN_STA_HT)
1958                 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
1959 #endif /* CONFIG_IEEE80211N */
1960 #ifdef CONFIG_IEEE80211AC
1961         if (sta->flags & WLAN_STA_VHT)
1962                 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
1963 #endif /* CONFIG_IEEE80211AC */
1964
1965         if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
1966                             sta->supported_rates, sta->supported_rates_len,
1967                             sta->listen_interval,
1968                             sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
1969                             sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
1970                             sta->flags, sta->qosinfo, sta->vht_opmode)) {
1971                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1972                                HOSTAPD_LEVEL_NOTICE,
1973                                "Could not add STA to kernel driver");
1974
1975                 ap_sta_disconnect(hapd, sta, sta->addr,
1976                                   WLAN_REASON_DISASSOC_AP_BUSY);
1977
1978                 return;
1979         }
1980
1981         if (sta->flags & WLAN_STA_WDS) {
1982                 int ret;
1983                 char ifname_wds[IFNAMSIZ + 1];
1984
1985                 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
1986                                           sta->aid, 1);
1987                 if (!ret)
1988                         hostapd_set_wds_encryption(hapd, sta, ifname_wds);
1989         }
1990
1991         if (sta->eapol_sm == NULL) {
1992                 /*
1993                  * This STA does not use RADIUS server for EAP authentication,
1994                  * so bind it to the selected VLAN interface now, since the
1995                  * interface selection is not going to change anymore.
1996                  */
1997                 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
1998                         return;
1999         } else if (sta->vlan_id) {
2000                 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
2001                 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
2002                         return;
2003         }
2004
2005         hostapd_set_sta_flags(hapd, sta);
2006
2007         if (sta->auth_alg == WLAN_AUTH_FT)
2008                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
2009         else
2010                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
2011         hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
2012
2013         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
2014 }
2015
2016
2017 static void handle_deauth_cb(struct hostapd_data *hapd,
2018                              const struct ieee80211_mgmt *mgmt,
2019                              size_t len, int ok)
2020 {
2021         struct sta_info *sta;
2022         if (mgmt->da[0] & 0x01)
2023                 return;
2024         sta = ap_get_sta(hapd, mgmt->da);
2025         if (!sta) {
2026                 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
2027                            " not found", MAC2STR(mgmt->da));
2028                 return;
2029         }
2030         if (ok)
2031                 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
2032                            MAC2STR(sta->addr));
2033         else
2034                 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2035                            "deauth", MAC2STR(sta->addr));
2036
2037         ap_sta_deauth_cb(hapd, sta);
2038 }
2039
2040
2041 static void handle_disassoc_cb(struct hostapd_data *hapd,
2042                                const struct ieee80211_mgmt *mgmt,
2043                                size_t len, int ok)
2044 {
2045         struct sta_info *sta;
2046         if (mgmt->da[0] & 0x01)
2047                 return;
2048         sta = ap_get_sta(hapd, mgmt->da);
2049         if (!sta) {
2050                 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
2051                            " not found", MAC2STR(mgmt->da));
2052                 return;
2053         }
2054         if (ok)
2055                 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
2056                            MAC2STR(sta->addr));
2057         else
2058                 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2059                            "disassoc", MAC2STR(sta->addr));
2060
2061         ap_sta_disassoc_cb(hapd, sta);
2062 }
2063
2064
2065 /**
2066  * ieee802_11_mgmt_cb - Process management frame TX status callback
2067  * @hapd: hostapd BSS data structure (the BSS from which the management frame
2068  * was sent from)
2069  * @buf: management frame data (starting from IEEE 802.11 header)
2070  * @len: length of frame data in octets
2071  * @stype: management frame subtype from frame control field
2072  * @ok: Whether the frame was ACK'ed
2073  */
2074 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
2075                         u16 stype, int ok)
2076 {
2077         const struct ieee80211_mgmt *mgmt;
2078         mgmt = (const struct ieee80211_mgmt *) buf;
2079
2080 #ifdef CONFIG_TESTING_OPTIONS
2081         if (hapd->ext_mgmt_frame_handling) {
2082                 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d",
2083                         stype, ok);
2084                 return;
2085         }
2086 #endif /* CONFIG_TESTING_OPTIONS */
2087
2088         switch (stype) {
2089         case WLAN_FC_STYPE_AUTH:
2090                 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
2091                 handle_auth_cb(hapd, mgmt, len, ok);
2092                 break;
2093         case WLAN_FC_STYPE_ASSOC_RESP:
2094                 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
2095                 handle_assoc_cb(hapd, mgmt, len, 0, ok);
2096                 break;
2097         case WLAN_FC_STYPE_REASSOC_RESP:
2098                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
2099                 handle_assoc_cb(hapd, mgmt, len, 1, ok);
2100                 break;
2101         case WLAN_FC_STYPE_PROBE_RESP:
2102                 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb");
2103                 break;
2104         case WLAN_FC_STYPE_DEAUTH:
2105                 wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
2106                 handle_deauth_cb(hapd, mgmt, len, ok);
2107                 break;
2108         case WLAN_FC_STYPE_DISASSOC:
2109                 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
2110                 handle_disassoc_cb(hapd, mgmt, len, ok);
2111                 break;
2112         case WLAN_FC_STYPE_ACTION:
2113                 wpa_printf(MSG_DEBUG, "mgmt::action cb");
2114                 break;
2115         default:
2116                 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype);
2117                 break;
2118         }
2119 }
2120
2121
2122 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2123 {
2124         /* TODO */
2125         return 0;
2126 }
2127
2128
2129 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2130                            char *buf, size_t buflen)
2131 {
2132         /* TODO */
2133         return 0;
2134 }
2135
2136
2137 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
2138                        const u8 *buf, size_t len, int ack)
2139 {
2140         struct sta_info *sta;
2141         struct hostapd_iface *iface = hapd->iface;
2142
2143         sta = ap_get_sta(hapd, addr);
2144         if (sta == NULL && iface->num_bss > 1) {
2145                 size_t j;
2146                 for (j = 0; j < iface->num_bss; j++) {
2147                         hapd = iface->bss[j];
2148                         sta = ap_get_sta(hapd, addr);
2149                         if (sta)
2150                                 break;
2151                 }
2152         }
2153         if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))
2154                 return;
2155         if (sta->flags & WLAN_STA_PENDING_POLL) {
2156                 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
2157                            "activity poll", MAC2STR(sta->addr),
2158                            ack ? "ACKed" : "did not ACK");
2159                 if (ack)
2160                         sta->flags &= ~WLAN_STA_PENDING_POLL;
2161         }
2162
2163         ieee802_1x_tx_status(hapd, sta, buf, len, ack);
2164 }
2165
2166
2167 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
2168                              const u8 *data, size_t len, int ack)
2169 {
2170         struct sta_info *sta;
2171         struct hostapd_iface *iface = hapd->iface;
2172
2173         sta = ap_get_sta(hapd, dst);
2174         if (sta == NULL && iface->num_bss > 1) {
2175                 size_t j;
2176                 for (j = 0; j < iface->num_bss; j++) {
2177                         hapd = iface->bss[j];
2178                         sta = ap_get_sta(hapd, dst);
2179                         if (sta)
2180                                 break;
2181                 }
2182         }
2183         if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
2184                 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
2185                            MACSTR " that is not currently associated",
2186                            MAC2STR(dst));
2187                 return;
2188         }
2189
2190         ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
2191 }
2192
2193
2194 void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
2195 {
2196         struct sta_info *sta;
2197         struct hostapd_iface *iface = hapd->iface;
2198
2199         sta = ap_get_sta(hapd, addr);
2200         if (sta == NULL && iface->num_bss > 1) {
2201                 size_t j;
2202                 for (j = 0; j < iface->num_bss; j++) {
2203                         hapd = iface->bss[j];
2204                         sta = ap_get_sta(hapd, addr);
2205                         if (sta)
2206                                 break;
2207                 }
2208         }
2209         if (sta == NULL)
2210                 return;
2211         if (!(sta->flags & WLAN_STA_PENDING_POLL))
2212                 return;
2213
2214         wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
2215                    "activity poll", MAC2STR(sta->addr));
2216         sta->flags &= ~WLAN_STA_PENDING_POLL;
2217 }
2218
2219
2220 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
2221                                 int wds)
2222 {
2223         struct sta_info *sta;
2224
2225         sta = ap_get_sta(hapd, src);
2226         if (sta && (sta->flags & WLAN_STA_ASSOC)) {
2227                 if (!hapd->conf->wds_sta)
2228                         return;
2229
2230                 if (wds && !(sta->flags & WLAN_STA_WDS)) {
2231                         int ret;
2232                         char ifname_wds[IFNAMSIZ + 1];
2233
2234                         wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
2235                                    "STA " MACSTR " (aid %u)",
2236                                    MAC2STR(sta->addr), sta->aid);
2237                         sta->flags |= WLAN_STA_WDS;
2238                         ret = hostapd_set_wds_sta(hapd, ifname_wds,
2239                                                   sta->addr, sta->aid, 1);
2240                         if (!ret)
2241                                 hostapd_set_wds_encryption(hapd, sta,
2242                                                            ifname_wds);
2243                 }
2244                 return;
2245         }
2246
2247         wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
2248                    MACSTR, MAC2STR(src));
2249         if (src[0] & 0x01) {
2250                 /* Broadcast bit set in SA?! Ignore the frame silently. */
2251                 return;
2252         }
2253
2254         if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
2255                 wpa_printf(MSG_DEBUG, "Association Response to the STA has "
2256                            "already been sent, but no TX status yet known - "
2257                            "ignore Class 3 frame issue with " MACSTR,
2258                            MAC2STR(src));
2259                 return;
2260         }
2261
2262         if (sta && (sta->flags & WLAN_STA_AUTH))
2263                 hostapd_drv_sta_disassoc(
2264                         hapd, src,
2265                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
2266         else
2267                 hostapd_drv_sta_deauth(
2268                         hapd, src,
2269                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
2270 }
2271
2272
2273 #endif /* CONFIG_NATIVE_WINDOWS */