vcs.maemo.org Git - wpasupplicant/blob - hostapd/ieee802_11.c

   1 /*
   2  * hostapd / IEEE 802.11 Management
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2007-2008, Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #include "includes.h"
  17
  18 #ifndef CONFIG_NATIVE_WINDOWS
  19
  20 #include <net/if.h>
  21
  22 #include "eloop.h"
  23 #include "hostapd.h"
  24 #include "ieee802_11.h"
  25 #include "beacon.h"
  26 #include "hw_features.h"
  27 #include "radius/radius.h"
  28 #include "radius/radius_client.h"
  29 #include "ieee802_11_auth.h"
  30 #include "sta_info.h"
  31 #include "rc4.h"
  32 #include "ieee802_1x.h"
  33 #include "wpa.h"
  34 #include "wme.h"
  35 #include "ap_list.h"
  36 #include "accounting.h"
  37 #include "driver.h"
  38 #include "mlme.h"
  39
  40
  41 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
  42 {
  43         u8 *pos = eid;
  44         int i, num, count;
  45
  46         if (hapd->iface->current_rates == NULL)
  47                 return eid;
  48
  49         *pos++ = WLAN_EID_SUPP_RATES;
  50         num = hapd->iface->num_rates;
  51         if (num > 8) {
  52                 /* rest of the rates are encoded in Extended supported
  53                  * rates element */
  54                 num = 8;
  55         }
  56
  57         *pos++ = num;
  58         count = 0;
  59         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
  60              i++) {
  61                 count++;
  62                 *pos = hapd->iface->current_rates[i].rate / 5;
  63                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
  64                         *pos |= 0x80;
  65                 pos++;
  66         }
  67
  68         return pos;
  69 }
  70
  71
  72 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
  73 {
  74         u8 *pos = eid;
  75         int i, num, count;
  76
  77         if (hapd->iface->current_rates == NULL)
  78                 return eid;
  79
  80         num = hapd->iface->num_rates;
  81         if (num <= 8)
  82                 return eid;
  83         num -= 8;
  84
  85         *pos++ = WLAN_EID_EXT_SUPP_RATES;
  86         *pos++ = num;
  87         count = 0;
  88         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
  89              i++) {
  90                 count++;
  91                 if (count <= 8)
  92                         continue; /* already in SuppRates IE */
  93                 *pos = hapd->iface->current_rates[i].rate / 5;
  94                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
  95                         *pos |= 0x80;
  96                 pos++;
  97         }
  98
  99         return pos;
 100 }
 101
 102
 103 u8 * hostapd_eid_ht_capabilities_info(struct hostapd_data *hapd, u8 *eid)
 104 {
 105 #ifdef CONFIG_IEEE80211N
 106         struct ieee80211_ht_capability *cap;
 107         u8 *pos = eid;
 108
 109         if (!hapd->iconf->ieee80211n)
 110                 return eid;
 111
 112         *pos++ = WLAN_EID_HT_CAP;
 113         *pos++ = sizeof(*cap);
 114
 115         cap = (struct ieee80211_ht_capability *) pos;
 116         os_memset(cap, 0, sizeof(*cap));
 117         SET_2BIT_U8(&cap->mac_ht_params_info,
 118                     MAC_HT_PARAM_INFO_MAX_RX_AMPDU_FACTOR_OFFSET,
 119                     MAX_RX_AMPDU_FACTOR_64KB);
 120
 121         cap->capabilities_info = host_to_le16(hapd->iconf->ht_capab);
 122
 123         cap->supported_mcs_set[0] = 0xff;
 124         cap->supported_mcs_set[1] = 0xff;
 125
 126         pos += sizeof(*cap);
 127
 128         return pos;
 129 #else /* CONFIG_IEEE80211N */
 130         return eid;
 131 #endif /* CONFIG_IEEE80211N */
 132 }
 133
 134
 135 u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
 136 {
 137 #ifdef CONFIG_IEEE80211N
 138         struct ieee80211_ht_operation *oper;
 139         u8 *pos = eid;
 140
 141         if (!hapd->iconf->ieee80211n)
 142                 return eid;
 143
 144         *pos++ = WLAN_EID_HT_OPERATION;
 145         *pos++ = sizeof(*oper);
 146
 147         oper = (struct ieee80211_ht_operation *) pos;
 148         os_memset(oper, 0, sizeof(*oper));
 149
 150         oper->control_chan = hapd->iconf->channel;
 151         oper->operation_mode = host_to_le16(hapd->iface->ht_op_mode);
 152         if (hapd->iconf->secondary_channel == 1)
 153                 oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
 154         if (hapd->iconf->secondary_channel == -1)
 155                 oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
 156
 157         pos += sizeof(*oper);
 158
 159         return pos;
 160 #else /* CONFIG_IEEE80211N */
 161         return eid;
 162 #endif /* CONFIG_IEEE80211N */
 163 }
 164
 165
 166 #ifdef CONFIG_IEEE80211N
 167
 168 /*
 169 op_mode
 170 Set to 0 (HT pure) under the followign conditions
 171         - all STAs in the BSS are 20/40 MHz HT in 20/40 MHz BSS or
 172         - all STAs in the BSS are 20 MHz HT in 20 MHz BSS
 173 Set to 1 (HT non-member protection) if there may be non-HT STAs
 174         in both the primary and the secondary channel
 175 Set to 2 if only HT STAs are associated in BSS,
 176         however and at least one 20 MHz HT STA is associated
 177 Set to 3 (HT mixed mode) when one or more non-HT STAs are associated
 178         (currently non-GF HT station is considered as non-HT STA also)
 179 */
 180 int hostapd_ht_operation_update(struct hostapd_iface *iface)
 181 {
 182         u16 cur_op_mode, new_op_mode;
 183         int op_mode_changes = 0;
 184
 185         if (!iface->conf->ieee80211n || iface->conf->ht_op_mode_fixed)
 186                 return 0;
 187
 188         wpa_printf(MSG_DEBUG, "%s current operation mode=0x%X",
 189                    __func__, iface->ht_op_mode);
 190
 191         if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT)
 192             && iface->num_sta_ht_no_gf) {
 193                 iface->ht_op_mode |=
 194                         HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
 195                 op_mode_changes++;
 196         } else if ((iface->ht_op_mode &
 197                     HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT) &&
 198                    iface->num_sta_ht_no_gf == 0) {
 199                 iface->ht_op_mode &=
 200                         ~HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
 201                 op_mode_changes++;
 202         }
 203
 204         if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
 205             (iface->num_sta_no_ht || iface->olbc_ht)) {
 206                 iface->ht_op_mode |= HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
 207                 op_mode_changes++;
 208         } else if ((iface->ht_op_mode &
 209                     HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
 210                    (iface->num_sta_no_ht == 0 && !iface->olbc_ht)) {
 211                 iface->ht_op_mode &=
 212                         ~HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
 213                 op_mode_changes++;
 214         }
 215
 216         /* Note: currently we switch to the MIXED op mode if HT non-greenfield
 217          * station is associated. Probably it's a theoretical case, since
 218          * it looks like all known HT STAs support greenfield.
 219          */
 220         new_op_mode = 0;
 221         if (iface->num_sta_no_ht ||
 222             (iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT))
 223                 new_op_mode = OP_MODE_MIXED;
 224         else if ((iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)
 225                  && iface->num_sta_ht_20mhz)
 226                 new_op_mode = OP_MODE_20MHZ_HT_STA_ASSOCED;
 227         else if (iface->olbc_ht)
 228                 new_op_mode = OP_MODE_MAY_BE_LEGACY_STAS;
 229         else
 230                 new_op_mode = OP_MODE_PURE;
 231
 232         cur_op_mode = iface->ht_op_mode & HT_INFO_OPERATION_MODE_OP_MODE_MASK;
 233         if (cur_op_mode != new_op_mode) {
 234                 iface->ht_op_mode &= ~HT_INFO_OPERATION_MODE_OP_MODE_MASK;
 235                 iface->ht_op_mode |= new_op_mode;
 236                 op_mode_changes++;
 237         }
 238
 239         wpa_printf(MSG_DEBUG, "%s new operation mode=0x%X changes=%d",
 240                    __func__, iface->ht_op_mode, op_mode_changes);
 241
 242         return op_mode_changes;
 243 }
 244
 245 #endif /* CONFIG_IEEE80211N */
 246
 247
 248 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
 249                            int probe)
 250 {
 251         int capab = WLAN_CAPABILITY_ESS;
 252         int privacy;
 253
 254         if (hapd->iface->num_sta_no_short_preamble == 0 &&
 255             hapd->iconf->preamble == SHORT_PREAMBLE)
 256                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 257
 258         privacy = hapd->conf->ssid.wep.keys_set;
 259
 260         if (hapd->conf->ieee802_1x &&
 261             (hapd->conf->default_wep_key_len ||
 262              hapd->conf->individual_wep_key_len))
 263                 privacy = 1;
 264
 265         if (hapd->conf->wpa)
 266                 privacy = 1;
 267
 268         if (sta) {
 269                 int policy, def_klen;
 270                 if (probe && sta->ssid_probe) {
 271                         policy = sta->ssid_probe->security_policy;
 272                         def_klen = sta->ssid_probe->wep.default_len;
 273                 } else {
 274                         policy = sta->ssid->security_policy;
 275                         def_klen = sta->ssid->wep.default_len;
 276                 }
 277                 privacy = policy != SECURITY_PLAINTEXT;
 278                 if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
 279                         privacy = 0;
 280         }
 281
 282         if (privacy)
 283                 capab |= WLAN_CAPABILITY_PRIVACY;
 284
 285         if (hapd->iface->current_mode &&
 286             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
 287             hapd->iface->num_sta_no_short_slot_time == 0)
 288                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 289
 290         return capab;
 291 }
 292
 293
 294 #ifdef CONFIG_IEEE80211W
 295 static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
 296                                             struct sta_info *sta, u8 *eid)
 297 {
 298         u8 *pos = eid;
 299         u32 timeout;
 300
 301         *pos++ = WLAN_EID_ASSOC_COMEBACK_TIME;
 302         *pos++ = 4;
 303         timeout = (hapd->conf->assoc_ping_attempts - sta->ping_count + 1) *
 304                 hapd->conf->assoc_ping_timeout;
 305         WPA_PUT_LE32(pos, timeout);
 306         pos += 4;
 307
 308         return pos;
 309 }
 310 #endif /* CONFIG_IEEE80211W */
 311
 312
 313 void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len)
 314 {
 315         int i;
 316         if (len > HOSTAPD_MAX_SSID_LEN)
 317                 len = HOSTAPD_MAX_SSID_LEN;
 318         for (i = 0; i < len; i++) {
 319                 if (ssid[i] >= 32 && ssid[i] < 127)
 320                         buf[i] = ssid[i];
 321                 else
 322                         buf[i] = '.';
 323         }
 324         buf[len] = '\0';
 325 }
 326
 327
 328 void ieee802_11_send_deauth(struct hostapd_data *hapd, u8 *addr, u16 reason)
 329 {
 330         struct ieee80211_mgmt mgmt;
 331
 332         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 333                        HOSTAPD_LEVEL_DEBUG,
 334                        "deauthenticate - reason %d", reason);
 335         os_memset(&mgmt, 0, sizeof(mgmt));
 336         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 337                                           WLAN_FC_STYPE_DEAUTH);
 338         os_memcpy(mgmt.da, addr, ETH_ALEN);
 339         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 340         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 341         mgmt.u.deauth.reason_code = host_to_le16(reason);
 342         if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
 343                                     sizeof(mgmt.u.deauth), 0) < 0)
 344                 perror("ieee802_11_send_deauth: send");
 345 }
 346
 347
 348 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
 349                            u16 auth_transaction, u8 *challenge, int iswep)
 350 {
 351         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 352                        HOSTAPD_LEVEL_DEBUG,
 353                        "authentication (shared key, transaction %d)",
 354                        auth_transaction);
 355
 356         if (auth_transaction == 1) {
 357                 if (!sta->challenge) {
 358                         /* Generate a pseudo-random challenge */
 359                         u8 key[8];
 360                         time_t now;
 361                         int r;
 362                         sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
 363                         if (sta->challenge == NULL)
 364                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 365
 366                         now = time(NULL);
 367                         r = random();
 368                         os_memcpy(key, &now, 4);
 369                         os_memcpy(key + 4, &r, 4);
 370                         rc4(sta->challenge, WLAN_AUTH_CHALLENGE_LEN,
 371                             key, sizeof(key));
 372                 }
 373                 return 0;
 374         }
 375
 376         if (auth_transaction != 3)
 377                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 378
 379         /* Transaction 3 */
 380         if (!iswep || !sta->challenge || !challenge ||
 381             os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
 382                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 383                                HOSTAPD_LEVEL_INFO,
 384                                "shared key authentication - invalid "
 385                                "challenge-response");
 386                 return WLAN_STATUS_CHALLENGE_FAIL;
 387         }
 388
 389         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 390                        HOSTAPD_LEVEL_DEBUG,
 391                        "authentication OK (shared key)");
 392 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 393         /* Station will be marked authenticated if it ACKs the
 394          * authentication reply. */
 395 #else
 396         sta->flags |= WLAN_STA_AUTH;
 397         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 398 #endif
 399         os_free(sta->challenge);
 400         sta->challenge = NULL;
 401
 402         return 0;
 403 }
 404
 405
 406 static void send_auth_reply(struct hostapd_data *hapd,
 407                             const u8 *dst, const u8 *bssid,
 408                             u16 auth_alg, u16 auth_transaction, u16 resp,
 409                             const u8 *ies, size_t ies_len)
 410 {
 411         struct ieee80211_mgmt *reply;
 412         u8 *buf;
 413         size_t rlen;
 414
 415         rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
 416         buf = os_zalloc(rlen);
 417         if (buf == NULL)
 418                 return;
 419
 420         reply = (struct ieee80211_mgmt *) buf;
 421         reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 422                                             WLAN_FC_STYPE_AUTH);
 423         os_memcpy(reply->da, dst, ETH_ALEN);
 424         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
 425         os_memcpy(reply->bssid, bssid, ETH_ALEN);
 426
 427         reply->u.auth.auth_alg = host_to_le16(auth_alg);
 428         reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
 429         reply->u.auth.status_code = host_to_le16(resp);
 430
 431         if (ies && ies_len)
 432                 os_memcpy(reply->u.auth.variable, ies, ies_len);
 433
 434         wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
 435                    " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
 436                    MAC2STR(dst), auth_alg, auth_transaction,
 437                    resp, (unsigned long) ies_len);
 438         if (hostapd_send_mgmt_frame(hapd, reply, rlen, 0) < 0)
 439                 perror("send_auth_reply: send");
 440
 441         os_free(buf);
 442 }
 443
 444
 445 #ifdef CONFIG_IEEE80211R
 446 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
 447                                   u16 auth_transaction, u16 status,
 448                                   const u8 *ies, size_t ies_len)
 449 {
 450         struct hostapd_data *hapd = ctx;
 451         struct sta_info *sta;
 452
 453         send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
 454                         status, ies, ies_len);
 455
 456         if (status != WLAN_STATUS_SUCCESS)
 457                 return;
 458
 459         sta = ap_get_sta(hapd, dst);
 460         if (sta == NULL)
 461                 return;
 462
 463         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
 464                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
 465         sta->flags |= WLAN_STA_AUTH;
 466         mlme_authenticate_indication(hapd, sta);
 467 }
 468 #endif /* CONFIG_IEEE80211R */
 469
 470
 471 static void handle_auth(struct hostapd_data *hapd, struct ieee80211_mgmt *mgmt,
 472                         size_t len)
 473 {
 474         u16 auth_alg, auth_transaction, status_code;
 475         u16 resp = WLAN_STATUS_SUCCESS;
 476         struct sta_info *sta = NULL;
 477         int res;
 478         u16 fc;
 479         u8 *challenge = NULL;
 480         u32 session_timeout, acct_interim_interval;
 481         int vlan_id = 0;
 482         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
 483         size_t resp_ies_len = 0;
 484
 485         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
 486                 printf("handle_auth - too short payload (len=%lu)\n",
 487                        (unsigned long) len);
 488                 return;
 489         }
 490
 491         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
 492         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
 493         status_code = le_to_host16(mgmt->u.auth.status_code);
 494         fc = le_to_host16(mgmt->frame_control);
 495
 496         if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
 497             2 + WLAN_AUTH_CHALLENGE_LEN &&
 498             mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
 499             mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
 500                 challenge = &mgmt->u.auth.variable[2];
 501
 502         wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
 503                    "auth_transaction=%d status_code=%d wep=%d%s",
 504                    MAC2STR(mgmt->sa), auth_alg, auth_transaction,
 505                    status_code, !!(fc & WLAN_FC_ISWEP),
 506                    challenge ? " challenge" : "");
 507
 508         if (hapd->tkip_countermeasures) {
 509                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 510                 goto fail;
 511         }
 512
 513         if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
 514                auth_alg == WLAN_AUTH_OPEN) ||
 515 #ifdef CONFIG_IEEE80211R
 516               (hapd->conf->wpa &&
 517                (hapd->conf->wpa_key_mgmt &
 518                 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
 519                auth_alg == WLAN_AUTH_FT) ||
 520 #endif /* CONFIG_IEEE80211R */
 521               ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
 522                auth_alg == WLAN_AUTH_SHARED_KEY))) {
 523                 printf("Unsupported authentication algorithm (%d)\n",
 524                        auth_alg);
 525                 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
 526                 goto fail;
 527         }
 528
 529         if (!(auth_transaction == 1 ||
 530               (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
 531                 printf("Unknown authentication transaction number (%d)\n",
 532                        auth_transaction);
 533                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 534                 goto fail;
 535         }
 536
 537         if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
 538                 printf("Station " MACSTR " not allowed to authenticate.\n",
 539                        MAC2STR(mgmt->sa));
 540                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 541                 goto fail;
 542         }
 543
 544         res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
 545                                       &session_timeout,
 546                                       &acct_interim_interval, &vlan_id);
 547         if (res == HOSTAPD_ACL_REJECT) {
 548                 printf("Station " MACSTR " not allowed to authenticate.\n",
 549                        MAC2STR(mgmt->sa));
 550                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 551                 goto fail;
 552         }
 553         if (res == HOSTAPD_ACL_PENDING) {
 554                 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
 555                            " waiting for an external authentication",
 556                            MAC2STR(mgmt->sa));
 557                 /* Authentication code will re-send the authentication frame
 558                  * after it has received (and cached) information from the
 559                  * external source. */
 560                 return;
 561         }
 562
 563         sta = ap_sta_add(hapd, mgmt->sa);
 564         if (!sta) {
 565                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 566                 goto fail;
 567         }
 568
 569         if (vlan_id > 0) {
 570                 if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 571                                                sta->vlan_id) == NULL) {
 572                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 573                                        HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
 574                                        "%d received from RADIUS server",
 575                                        vlan_id);
 576                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 577                         goto fail;
 578                 }
 579                 sta->vlan_id = vlan_id;
 580                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 581                                HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
 582         }
 583
 584         sta->flags &= ~WLAN_STA_PREAUTH;
 585         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
 586
 587         if (hapd->conf->radius->acct_interim_interval == 0 &&
 588             acct_interim_interval)
 589                 sta->acct_interim_interval = acct_interim_interval;
 590         if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
 591                 ap_sta_session_timeout(hapd, sta, session_timeout);
 592         else
 593                 ap_sta_no_session_timeout(hapd, sta);
 594
 595         switch (auth_alg) {
 596         case WLAN_AUTH_OPEN:
 597                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 598                                HOSTAPD_LEVEL_DEBUG,
 599                                "authentication OK (open system)");
 600 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 601                 /* Station will be marked authenticated if it ACKs the
 602                  * authentication reply. */
 603 #else
 604                 sta->flags |= WLAN_STA_AUTH;
 605                 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 606                 sta->auth_alg = WLAN_AUTH_OPEN;
 607                 mlme_authenticate_indication(hapd, sta);
 608 #endif
 609                 break;
 610         case WLAN_AUTH_SHARED_KEY:
 611                 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
 612                                        fc & WLAN_FC_ISWEP);
 613                 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
 614                 mlme_authenticate_indication(hapd, sta);
 615                 if (sta->challenge && auth_transaction == 1) {
 616                         resp_ies[0] = WLAN_EID_CHALLENGE;
 617                         resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
 618                         os_memcpy(resp_ies + 2, sta->challenge,
 619                                   WLAN_AUTH_CHALLENGE_LEN);
 620                         resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
 621                 }
 622                 break;
 623 #ifdef CONFIG_IEEE80211R
 624         case WLAN_AUTH_FT:
 625                 sta->auth_alg = WLAN_AUTH_FT;
 626                 if (sta->wpa_sm == NULL)
 627                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 628                                                         sta->addr);
 629                 if (sta->wpa_sm == NULL) {
 630                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
 631                                    "state machine");
 632                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 633                         goto fail;
 634                 }
 635                 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
 636                                     auth_transaction, mgmt->u.auth.variable,
 637                                     len - IEEE80211_HDRLEN -
 638                                     sizeof(mgmt->u.auth),
 639                                     handle_auth_ft_finish, hapd);
 640                 /* handle_auth_ft_finish() callback will complete auth. */
 641                 return;
 642 #endif /* CONFIG_IEEE80211R */
 643         }
 644
 645  fail:
 646         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
 647                         auth_transaction + 1, resp, resp_ies, resp_ies_len);
 648 }
 649
 650
 651 static void handle_assoc(struct hostapd_data *hapd,
 652                          struct ieee80211_mgmt *mgmt, size_t len, int reassoc)
 653 {
 654         u16 capab_info, listen_interval;
 655         u16 resp = WLAN_STATUS_SUCCESS;
 656         u8 *pos, *wpa_ie;
 657         size_t wpa_ie_len;
 658         int send_deauth = 0, send_len, left, i;
 659         struct sta_info *sta;
 660         struct ieee802_11_elems elems;
 661         u8 buf[sizeof(struct ieee80211_mgmt) + 512];
 662         struct ieee80211_mgmt *reply;
 663
 664         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
 665                                       sizeof(mgmt->u.assoc_req))) {
 666                 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
 667                        "\n", reassoc, (unsigned long) len);
 668                 return;
 669         }
 670
 671         if (reassoc) {
 672                 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
 673                 listen_interval = le_to_host16(
 674                         mgmt->u.reassoc_req.listen_interval);
 675                 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
 676                            " capab_info=0x%02x listen_interval=%d current_ap="
 677                            MACSTR,
 678                            MAC2STR(mgmt->sa), capab_info, listen_interval,
 679                            MAC2STR(mgmt->u.reassoc_req.current_ap));
 680                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
 681                 pos = mgmt->u.reassoc_req.variable;
 682         } else {
 683                 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
 684                 listen_interval = le_to_host16(
 685                         mgmt->u.assoc_req.listen_interval);
 686                 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
 687                            " capab_info=0x%02x listen_interval=%d",
 688                            MAC2STR(mgmt->sa), capab_info, listen_interval);
 689                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
 690                 pos = mgmt->u.assoc_req.variable;
 691         }
 692
 693         sta = ap_get_sta(hapd, mgmt->sa);
 694 #ifdef CONFIG_IEEE80211R
 695         if (sta && sta->auth_alg == WLAN_AUTH_FT &&
 696             (sta->flags & WLAN_STA_AUTH) == 0) {
 697                 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
 698                            "prior to authentication since it is using "
 699                            "over-the-DS FT", MAC2STR(mgmt->sa));
 700         } else
 701 #endif /* CONFIG_IEEE80211R */
 702         if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
 703                 printf("STA " MACSTR " trying to associate before "
 704                        "authentication\n", MAC2STR(mgmt->sa));
 705                 if (sta) {
 706                         printf("  sta: addr=" MACSTR " aid=%d flags=0x%04x\n",
 707                                MAC2STR(sta->addr), sta->aid, sta->flags);
 708                 }
 709                 send_deauth = 1;
 710                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 711                 goto fail;
 712         }
 713
 714         if (hapd->tkip_countermeasures) {
 715                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 716                 goto fail;
 717         }
 718
 719         if (listen_interval > hapd->conf->max_listen_interval) {
 720                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 721                                HOSTAPD_LEVEL_DEBUG,
 722                                "Too large Listen Interval (%d)",
 723                                listen_interval);
 724                 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
 725                 goto fail;
 726         }
 727
 728         sta->capability = capab_info;
 729         sta->listen_interval = listen_interval;
 730
 731         /* followed by SSID and Supported rates; and HT capabilities if 802.11n
 732          * is used */
 733         if (ieee802_11_parse_elems(pos, left, &elems, 1) == ParseFailed ||
 734             !elems.ssid) {
 735                 printf("STA " MACSTR " sent invalid association request\n",
 736                        MAC2STR(sta->addr));
 737                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 738                 goto fail;
 739         }
 740
 741         if (elems.ssid_len != hapd->conf->ssid.ssid_len ||
 742             os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) != 0)
 743         {
 744                 char ssid_txt[33];
 745                 ieee802_11_print_ssid(ssid_txt, elems.ssid, elems.ssid_len);
 746                 printf("Station " MACSTR " tried to associate with "
 747                        "unknown SSID '%s'\n", MAC2STR(sta->addr), ssid_txt);
 748                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 749                 goto fail;
 750         }
 751
 752         sta->flags &= ~WLAN_STA_WME;
 753         if (elems.wme && hapd->conf->wme_enabled) {
 754                 if (hostapd_eid_wme_valid(hapd, elems.wme, elems.wme_len))
 755                         hostapd_logger(hapd, sta->addr,
 756                                        HOSTAPD_MODULE_WPA,
 757                                        HOSTAPD_LEVEL_DEBUG,
 758                                        "invalid WME element in association "
 759                                        "request");
 760                 else
 761                         sta->flags |= WLAN_STA_WME;
 762         }
 763
 764         if (!elems.supp_rates) {
 765                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 766                                HOSTAPD_LEVEL_DEBUG,
 767                                "No supported rates element in AssocReq");
 768                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 769                 goto fail;
 770         }
 771
 772         if (elems.supp_rates_len > sizeof(sta->supported_rates)) {
 773                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 774                                HOSTAPD_LEVEL_DEBUG,
 775                                "Invalid supported rates element length %d",
 776                                elems.supp_rates_len);
 777                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 778                 goto fail;
 779         }
 780
 781         os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
 782         os_memcpy(sta->supported_rates, elems.supp_rates,
 783                   elems.supp_rates_len);
 784         sta->supported_rates_len = elems.supp_rates_len;
 785
 786         if (elems.ext_supp_rates) {
 787                 if (elems.supp_rates_len + elems.ext_supp_rates_len >
 788                     sizeof(sta->supported_rates)) {
 789                         hostapd_logger(hapd, mgmt->sa,
 790                                        HOSTAPD_MODULE_IEEE80211,
 791                                        HOSTAPD_LEVEL_DEBUG,
 792                                        "Invalid supported rates element length"
 793                                        " %d+%d", elems.supp_rates_len,
 794                                        elems.ext_supp_rates_len);
 795                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 796                         goto fail;
 797                 }
 798
 799                 os_memcpy(sta->supported_rates + elems.supp_rates_len,
 800                           elems.ext_supp_rates, elems.ext_supp_rates_len);
 801                 sta->supported_rates_len += elems.ext_supp_rates_len;
 802         }
 803
 804 #ifdef CONFIG_IEEE80211N
 805         /* save HT capabilities in the sta object */
 806         os_memset(&sta->ht_capabilities, 0, sizeof(sta->ht_capabilities));
 807         if (elems.ht_capabilities &&
 808             elems.ht_capabilities_len >= sizeof(struct ieee80211_ht_capability)
 809             && (sta->flags & WLAN_STA_WME)) {
 810                 /* note: without WMM capability, treat the sta as non-HT */
 811                 sta->flags |= WLAN_STA_HT;
 812                 sta->ht_capabilities.id = WLAN_EID_HT_CAP;
 813                 sta->ht_capabilities.length =
 814                         sizeof(struct ieee80211_ht_capability);
 815                 os_memcpy(&sta->ht_capabilities.data,
 816                           elems.ht_capabilities,
 817                           sizeof(struct ieee80211_ht_capability));
 818         } else
 819                 sta->flags &= ~WLAN_STA_HT;
 820 #endif /* CONFIG_IEEE80211N */
 821
 822         if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
 823                 wpa_ie = elems.rsn_ie;
 824                 wpa_ie_len = elems.rsn_ie_len;
 825         } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
 826                    elems.wpa_ie) {
 827                 wpa_ie = elems.wpa_ie;
 828                 wpa_ie_len = elems.wpa_ie_len;
 829         } else {
 830                 wpa_ie = NULL;
 831                 wpa_ie_len = 0;
 832         }
 833 #ifdef CONFIG_WPS
 834         if (hapd->conf->wps_state && wpa_ie == NULL) {
 835                 if (elems.wps_ie) {
 836                         wpa_printf(MSG_DEBUG, "STA included WPS IE in "
 837                                    "(Re)Association Request - assume WPS is "
 838                                    "used");
 839                         sta->flags |= WLAN_STA_WPS;
 840                 } else {
 841                         wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE "
 842                                    "in (Re)Association Request - possible WPS "
 843                                    "use");
 844                         sta->flags |= WLAN_STA_MAYBE_WPS;
 845                 }
 846         } else
 847 #endif /* CONFIG_WPS */
 848         if (hapd->conf->wpa && wpa_ie == NULL) {
 849                 printf("STA " MACSTR ": No WPA/RSN IE in association "
 850                        "request\n", MAC2STR(sta->addr));
 851                 resp = WLAN_STATUS_INVALID_IE;
 852                 goto fail;
 853         }
 854
 855         if (hapd->conf->wpa && wpa_ie) {
 856                 int res;
 857                 wpa_ie -= 2;
 858                 wpa_ie_len += 2;
 859                 if (sta->wpa_sm == NULL)
 860                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 861                                                         sta->addr);
 862                 if (sta->wpa_sm == NULL) {
 863                         printf("Failed to initialize WPA state machine\n");
 864                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 865                         goto fail;
 866                 }
 867                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 868                                           wpa_ie, wpa_ie_len,
 869                                           elems.mdie, elems.mdie_len);
 870                 if (res == WPA_INVALID_GROUP)
 871                         resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
 872                 else if (res == WPA_INVALID_PAIRWISE)
 873                         resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
 874                 else if (res == WPA_INVALID_AKMP)
 875                         resp = WLAN_STATUS_AKMP_NOT_VALID;
 876                 else if (res == WPA_ALLOC_FAIL)
 877                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 878 #ifdef CONFIG_IEEE80211W
 879                 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
 880                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE; /* FIX */
 881                 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
 882                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE; /* FIX */
 883 #endif /* CONFIG_IEEE80211W */
 884                 else if (res == WPA_INVALID_MDIE)
 885                         resp = WLAN_STATUS_INVALID_MDIE;
 886                 else if (res != WPA_IE_OK)
 887                         resp = WLAN_STATUS_INVALID_IE;
 888                 if (resp != WLAN_STATUS_SUCCESS)
 889                         goto fail;
 890 #ifdef CONFIG_IEEE80211W
 891                 if ((sta->flags & WLAN_STA_MFP) && !sta->ping_timed_out) {
 892                         /*
 893                          * STA has already been associated with MFP and ping
 894                          * timeout has not been reached. Reject the
 895                          * association attempt temporarily and start ping, if
 896                          * one is not pending.
 897                          */
 898
 899                         if (sta->ping_count == 0)
 900                                 ap_sta_start_ping(hapd, sta);
 901
 902                         resp = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
 903                         goto fail;
 904                 }
 905
 906                 if (wpa_auth_uses_mfp(sta->wpa_sm))
 907                         sta->flags |= WLAN_STA_MFP;
 908                 else
 909                         sta->flags &= ~WLAN_STA_MFP;
 910 #endif /* CONFIG_IEEE80211W */
 911
 912 #ifdef CONFIG_IEEE80211R
 913                 if (sta->auth_alg == WLAN_AUTH_FT) {
 914                         if (!reassoc) {
 915                                 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
 916                                            "to use association (not "
 917                                            "re-association) with FT auth_alg",
 918                                            MAC2STR(sta->addr));
 919                                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 920                                 goto fail;
 921                         }
 922
 923                         resp = wpa_ft_validate_reassoc(sta->wpa_sm, pos, left);
 924                         if (resp != WLAN_STATUS_SUCCESS)
 925                                 goto fail;
 926                 }
 927 #endif /* CONFIG_IEEE80211R */
 928         }
 929
 930         if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 931                 sta->flags |= WLAN_STA_NONERP;
 932         for (i = 0; i < sta->supported_rates_len; i++) {
 933                 if ((sta->supported_rates[i] & 0x7f) > 22) {
 934                         sta->flags &= ~WLAN_STA_NONERP;
 935                         break;
 936                 }
 937         }
 938         if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
 939                 sta->nonerp_set = 1;
 940                 hapd->iface->num_sta_non_erp++;
 941                 if (hapd->iface->num_sta_non_erp == 1)
 942                         ieee802_11_set_beacons(hapd->iface);
 943         }
 944
 945         if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
 946             !sta->no_short_slot_time_set) {
 947                 sta->no_short_slot_time_set = 1;
 948                 hapd->iface->num_sta_no_short_slot_time++;
 949                 if (hapd->iface->current_mode->mode ==
 950                     HOSTAPD_MODE_IEEE80211G &&
 951                     hapd->iface->num_sta_no_short_slot_time == 1)
 952                         ieee802_11_set_beacons(hapd->iface);
 953         }
 954
 955         if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
 956                 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 957         else
 958                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 959
 960         if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
 961             !sta->no_short_preamble_set) {
 962                 sta->no_short_preamble_set = 1;
 963                 hapd->iface->num_sta_no_short_preamble++;
 964                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 965                     && hapd->iface->num_sta_no_short_preamble == 1)
 966                         ieee802_11_set_beacons(hapd->iface);
 967         }
 968
 969 #ifdef CONFIG_IEEE80211N
 970         if (sta->flags & WLAN_STA_HT) {
 971                 u16 ht_capab = le_to_host16(
 972                         sta->ht_capabilities.data.capabilities_info);
 973                 wpa_printf(MSG_DEBUG, "HT: STA " MACSTR " HT Capabilities "
 974                            "Info: 0x%04x", MAC2STR(sta->addr), ht_capab);
 975                 if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0) {
 976                         hapd->iface->num_sta_ht_no_gf++;
 977                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no "
 978                                    "greenfield, num of non-gf stations %d",
 979                                    __func__, MAC2STR(sta->addr),
 980                                    hapd->iface->num_sta_ht_no_gf);
 981                 }
 982                 if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0) {
 983                         hapd->iface->num_sta_ht_20mhz++;
 984                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - 20 MHz HT, "
 985                                    "num of 20MHz HT STAs %d",
 986                                    __func__, MAC2STR(sta->addr),
 987                                    hapd->iface->num_sta_ht_20mhz);
 988                 }
 989         } else {
 990                 hapd->iface->num_sta_no_ht++;
 991                 if (hapd->iconf->ieee80211n) {
 992                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR
 993                                    " - no HT, num of non-HT stations %d",
 994                                    __func__, MAC2STR(sta->addr),
 995                                    hapd->iface->num_sta_no_ht);
 996                 }
 997         }
 998
 999         if (hostapd_ht_operation_update(hapd->iface) > 0)
1000                 ieee802_11_set_beacons(hapd->iface);
1001 #endif /* CONFIG_IEEE80211N */
1002
1003         /* get a unique AID */
1004         if (sta->aid > 0) {
1005                 wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
1006         } else {
1007                 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1008                         if (hapd->sta_aid[sta->aid - 1] == NULL)
1009                                 break;
1010                 if (sta->aid > MAX_AID_TABLE_SIZE) {
1011                         sta->aid = 0;
1012                         resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1013                         wpa_printf(MSG_ERROR, "  no room for more AIDs");
1014                         goto fail;
1015                 } else {
1016                         hapd->sta_aid[sta->aid - 1] = sta;
1017                         wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
1018                 }
1019         }
1020
1021         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1022                        HOSTAPD_LEVEL_DEBUG,
1023                        "association OK (aid %d)", sta->aid);
1024         /* Station will be marked associated, after it acknowledges AssocResp
1025          */
1026
1027         if (reassoc) {
1028                 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap,
1029                           ETH_ALEN);
1030         }
1031
1032         if (sta->last_assoc_req)
1033                 os_free(sta->last_assoc_req);
1034         sta->last_assoc_req = os_malloc(len);
1035         if (sta->last_assoc_req)
1036                 os_memcpy(sta->last_assoc_req, mgmt, len);
1037
1038         /* Make sure that the previously registered inactivity timer will not
1039          * remove the STA immediately. */
1040         sta->timeout_next = STA_NULLFUNC;
1041
1042  fail:
1043         os_memset(buf, 0, sizeof(buf));
1044         reply = (struct ieee80211_mgmt *) buf;
1045         reply->frame_control =
1046                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1047                              (send_deauth ? WLAN_FC_STYPE_DEAUTH :
1048                               (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1049                                WLAN_FC_STYPE_ASSOC_RESP)));
1050         os_memcpy(reply->da, mgmt->sa, ETH_ALEN);
1051         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
1052         os_memcpy(reply->bssid, mgmt->bssid, ETH_ALEN);
1053
1054         send_len = IEEE80211_HDRLEN;
1055         if (send_deauth) {
1056                 send_len += sizeof(reply->u.deauth);
1057                 reply->u.deauth.reason_code = host_to_le16(resp);
1058         } else {
1059                 u8 *p;
1060                 send_len += sizeof(reply->u.assoc_resp);
1061                 reply->u.assoc_resp.capab_info =
1062                         host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
1063                 reply->u.assoc_resp.status_code = host_to_le16(resp);
1064                 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
1065                                                        | BIT(14) | BIT(15));
1066                 /* Supported rates */
1067                 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
1068                 /* Extended supported rates */
1069                 p = hostapd_eid_ext_supp_rates(hapd, p);
1070                 if (sta->flags & WLAN_STA_WME)
1071                         p = hostapd_eid_wme(hapd, p);
1072
1073                 p = hostapd_eid_ht_capabilities_info(hapd, p);
1074                 p = hostapd_eid_ht_operation(hapd, p);
1075
1076 #ifdef CONFIG_IEEE80211R
1077                 if (resp == WLAN_STATUS_SUCCESS) {
1078                         /* IEEE 802.11r: Mobility Domain Information, Fast BSS
1079                          * Transition Information, RSN */
1080                         p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
1081                                                         buf + sizeof(buf) - p,
1082                                                         sta->auth_alg);
1083                 }
1084 #endif /* CONFIG_IEEE80211R */
1085
1086 #ifdef CONFIG_IEEE80211W
1087                 if (resp == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
1088                         p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
1089 #endif /* CONFIG_IEEE80211W */
1090
1091                 send_len += p - reply->u.assoc_resp.variable;
1092         }
1093
1094         if (hostapd_send_mgmt_frame(hapd, reply, send_len, 0) < 0)
1095                 perror("handle_assoc: send");
1096 }
1097
1098
1099 static void handle_disassoc(struct hostapd_data *hapd,
1100                             struct ieee80211_mgmt *mgmt, size_t len)
1101 {
1102         struct sta_info *sta;
1103
1104         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1105                 printf("handle_disassoc - too short payload (len=%lu)\n",
1106                        (unsigned long) len);
1107                 return;
1108         }
1109
1110         wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1111                    MAC2STR(mgmt->sa),
1112                    le_to_host16(mgmt->u.disassoc.reason_code));
1113
1114         sta = ap_get_sta(hapd, mgmt->sa);
1115         if (sta == NULL) {
1116                 printf("Station " MACSTR " trying to disassociate, but it "
1117                        "is not associated.\n", MAC2STR(mgmt->sa));
1118                 return;
1119         }
1120
1121         sta->flags &= ~WLAN_STA_ASSOC;
1122         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1123         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1124                        HOSTAPD_LEVEL_INFO, "disassociated");
1125         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1126         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1127         /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1128          * authenticated. */
1129         accounting_sta_stop(hapd, sta);
1130         ieee802_1x_free_station(sta);
1131         hostapd_sta_remove(hapd, sta->addr);
1132
1133         if (sta->timeout_next == STA_NULLFUNC ||
1134             sta->timeout_next == STA_DISASSOC) {
1135                 sta->timeout_next = STA_DEAUTH;
1136                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1137                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1138                                        hapd, sta);
1139         }
1140
1141         mlme_disassociate_indication(
1142                 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1143 }
1144
1145
1146 static void handle_deauth(struct hostapd_data *hapd,
1147                           struct ieee80211_mgmt *mgmt, size_t len)
1148 {
1149         struct sta_info *sta;
1150
1151         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1152                 printf("handle_deauth - too short payload (len=%lu)\n",
1153                        (unsigned long) len);
1154                 return;
1155         }
1156
1157         wpa_printf(MSG_DEBUG, "deauthentication: STA=" MACSTR
1158                    " reason_code=%d",
1159                    MAC2STR(mgmt->sa),
1160                    le_to_host16(mgmt->u.deauth.reason_code));
1161
1162         sta = ap_get_sta(hapd, mgmt->sa);
1163         if (sta == NULL) {
1164                 printf("Station " MACSTR " trying to deauthenticate, but it "
1165                        "is not authenticated.\n", MAC2STR(mgmt->sa));
1166                 return;
1167         }
1168
1169         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1170         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1171         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1172                        HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1173         mlme_deauthenticate_indication(
1174                 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1175         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1176         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1177         ap_free_sta(hapd, sta);
1178 }
1179
1180
1181 static void handle_beacon(struct hostapd_data *hapd,
1182                           struct ieee80211_mgmt *mgmt, size_t len,
1183                           struct hostapd_frame_info *fi)
1184 {
1185         struct ieee802_11_elems elems;
1186
1187         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1188                 printf("handle_beacon - too short payload (len=%lu)\n",
1189                        (unsigned long) len);
1190                 return;
1191         }
1192
1193         (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1194                                       len - (IEEE80211_HDRLEN +
1195                                              sizeof(mgmt->u.beacon)), &elems,
1196                                       0);
1197
1198         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1199 }
1200
1201
1202 #ifdef CONFIG_IEEE80211W
1203 static void hostapd_ping_action(struct hostapd_data *hapd,
1204                                 struct ieee80211_mgmt *mgmt, size_t len)
1205 {
1206         struct sta_info *sta;
1207         u8 *end;
1208         int i;
1209
1210         end = mgmt->u.action.u.ping_resp.trans_id + WLAN_PING_TRANS_ID_LEN;
1211         if (((u8 *) mgmt) + len < end) {
1212                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short Ping Action "
1213                            "frame (len=%lu)", (unsigned long) len);
1214                 return;
1215         }
1216
1217         if (mgmt->u.action.u.ping_resp.action != WLAN_PING_RESPONSE) {
1218                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected Ping Action %d",
1219                            mgmt->u.action.u.ping_resp.action);
1220                 return;
1221         }
1222
1223         /* MLME-PING.confirm */
1224
1225         sta = ap_get_sta(hapd, mgmt->sa);
1226         if (sta == NULL || sta->ping_trans_id == NULL) {
1227                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
1228                            "pending ping request found");
1229                 return;
1230         }
1231
1232         for (i = 0; i < sta->ping_count; i++) {
1233                 if (os_memcmp(sta->ping_trans_id + i * WLAN_PING_TRANS_ID_LEN,
1234                               mgmt->u.action.u.ping_resp.trans_id,
1235                               WLAN_PING_TRANS_ID_LEN) == 0)
1236                         break;
1237         }
1238
1239         if (i >= sta->ping_count) {
1240                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching ping "
1241                            "transaction identifier found");
1242                 return;
1243         }
1244
1245         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1246                        HOSTAPD_LEVEL_DEBUG, "Reply to pending ping received");
1247         ap_sta_stop_ping(hapd, sta);
1248 }
1249 #endif /* CONFIG_IEEE80211W */
1250
1251
1252 static void handle_action(struct hostapd_data *hapd,
1253                           struct ieee80211_mgmt *mgmt, size_t len)
1254 {
1255         if (len < IEEE80211_HDRLEN + 1) {
1256                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1257                                HOSTAPD_LEVEL_DEBUG,
1258                                "handle_action - too short payload (len=%lu)",
1259                                (unsigned long) len);
1260                 return;
1261         }
1262
1263         switch (mgmt->u.action.category) {
1264 #ifdef CONFIG_IEEE80211R
1265         case WLAN_ACTION_FT:
1266         {
1267                 struct sta_info *sta;
1268
1269                 sta = ap_get_sta(hapd, mgmt->sa);
1270                 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
1271                         wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action "
1272                                    "frame from unassociated STA " MACSTR,
1273                                    MAC2STR(mgmt->sa));
1274                         return;
1275                 }
1276
1277                 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
1278                                      len - IEEE80211_HDRLEN))
1279                         break;
1280
1281                 return;
1282         }
1283 #endif /* CONFIG_IEEE80211R */
1284         case WLAN_ACTION_WMM:
1285                 hostapd_wme_action(hapd, mgmt, len);
1286                 return;
1287 #ifdef CONFIG_IEEE80211W
1288         case WLAN_ACTION_PING:
1289                 hostapd_ping_action(hapd, mgmt, len);
1290                 return;
1291 #endif /* CONFIG_IEEE80211W */
1292         }
1293
1294         hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1295                        HOSTAPD_LEVEL_DEBUG,
1296                        "handle_action - unknown action category %d or invalid "
1297                        "frame",
1298                        mgmt->u.action.category);
1299         if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
1300             !(mgmt->sa[0] & 0x01)) {
1301                 /*
1302                  * IEEE 802.11-REVma/D9.0 - 7.3.1.11
1303                  * Return the Action frame to the source without change
1304                  * except that MSB of the Category set to 1.
1305                  */
1306                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
1307                            "frame back to sender");
1308                 os_memcpy(mgmt->da, mgmt->sa, ETH_ALEN);
1309                 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
1310                 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
1311                 mgmt->u.action.category |= 0x80;
1312
1313                 hostapd_send_mgmt_frame(hapd, mgmt, len, 0);
1314         }
1315 }
1316
1317
1318 /**
1319  * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
1320  * @hapd: hostapd BSS data structure (the BSS to which the management frame was
1321  * sent to)
1322  * @buf: management frame data (starting from IEEE 802.11 header)
1323  * @len: length of frame data in octets
1324  * @stype: management frame subtype from frame control field
1325  *
1326  * Process all incoming IEEE 802.11 management frames. This will be called for
1327  * each frame received from the kernel driver through wlan#ap interface. In
1328  * addition, it can be called to re-inserted pending frames (e.g., when using
1329  * external RADIUS server as an MAC ACL).
1330  */
1331 void ieee802_11_mgmt(struct hostapd_data *hapd, u8 *buf, size_t len, u16 stype,
1332                      struct hostapd_frame_info *fi)
1333 {
1334         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
1335         int broadcast;
1336
1337         if (stype == WLAN_FC_STYPE_BEACON) {
1338                 handle_beacon(hapd, mgmt, len, fi);
1339                 return;
1340         }
1341
1342         if (fi && fi->passive_scan)
1343                 return;
1344
1345         broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
1346                 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
1347                 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
1348
1349         if (!broadcast &&
1350             os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
1351                 printf("MGMT: BSSID=" MACSTR " not our address\n",
1352                        MAC2STR(mgmt->bssid));
1353                 return;
1354         }
1355
1356
1357         if (stype == WLAN_FC_STYPE_PROBE_REQ) {
1358                 handle_probe_req(hapd, mgmt, len);
1359                 return;
1360         }
1361
1362         if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
1363                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1364                                HOSTAPD_LEVEL_DEBUG,
1365                                "MGMT: DA=" MACSTR " not our address",
1366                                MAC2STR(mgmt->da));
1367                 return;
1368         }
1369
1370         switch (stype) {
1371         case WLAN_FC_STYPE_AUTH:
1372                 wpa_printf(MSG_DEBUG, "mgmt::auth");
1373                 handle_auth(hapd, mgmt, len);
1374                 break;
1375         case WLAN_FC_STYPE_ASSOC_REQ:
1376                 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
1377                 handle_assoc(hapd, mgmt, len, 0);
1378                 break;
1379         case WLAN_FC_STYPE_REASSOC_REQ:
1380                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
1381                 handle_assoc(hapd, mgmt, len, 1);
1382                 break;
1383         case WLAN_FC_STYPE_DISASSOC:
1384                 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
1385                 handle_disassoc(hapd, mgmt, len);
1386                 break;
1387         case WLAN_FC_STYPE_DEAUTH:
1388                 wpa_printf(MSG_DEBUG, "mgmt::deauth");
1389                 handle_deauth(hapd, mgmt, len);
1390                 break;
1391         case WLAN_FC_STYPE_ACTION:
1392                 wpa_printf(MSG_DEBUG, "mgmt::action");
1393                 handle_action(hapd, mgmt, len);
1394                 break;
1395         default:
1396                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1397                                HOSTAPD_LEVEL_DEBUG,
1398                                "unknown mgmt frame subtype %d", stype);
1399                 break;
1400         }
1401 }
1402
1403
1404 static void handle_auth_cb(struct hostapd_data *hapd,
1405                            struct ieee80211_mgmt *mgmt,
1406                            size_t len, int ok)
1407 {
1408         u16 auth_alg, auth_transaction, status_code;
1409         struct sta_info *sta;
1410
1411         if (!ok) {
1412                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1413                                HOSTAPD_LEVEL_NOTICE,
1414                                "did not acknowledge authentication response");
1415                 return;
1416         }
1417
1418         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
1419                 printf("handle_auth_cb - too short payload (len=%lu)\n",
1420                        (unsigned long) len);
1421                 return;
1422         }
1423
1424         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1425         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
1426         status_code = le_to_host16(mgmt->u.auth.status_code);
1427
1428         sta = ap_get_sta(hapd, mgmt->da);
1429         if (!sta) {
1430                 printf("handle_auth_cb: STA " MACSTR " not found\n",
1431                        MAC2STR(mgmt->da));
1432                 return;
1433         }
1434
1435         if (status_code == WLAN_STATUS_SUCCESS &&
1436             ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
1437              (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
1438                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1439                                HOSTAPD_LEVEL_INFO, "authenticated");
1440                 sta->flags |= WLAN_STA_AUTH;
1441         }
1442 }
1443
1444
1445 static void handle_assoc_cb(struct hostapd_data *hapd,
1446                             struct ieee80211_mgmt *mgmt,
1447                             size_t len, int reassoc, int ok)
1448 {
1449         u16 status;
1450         struct sta_info *sta;
1451         int new_assoc = 1;
1452         struct ht_cap_ie *ht_cap = NULL;
1453
1454         if (!ok) {
1455                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1456                                HOSTAPD_LEVEL_DEBUG,
1457                                "did not acknowledge association response");
1458                 return;
1459         }
1460
1461         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
1462                                       sizeof(mgmt->u.assoc_resp))) {
1463                 printf("handle_assoc_cb(reassoc=%d) - too short payload "
1464                        "(len=%lu)\n", reassoc, (unsigned long) len);
1465                 return;
1466         }
1467
1468         if (reassoc)
1469                 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
1470         else
1471                 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1472
1473         sta = ap_get_sta(hapd, mgmt->da);
1474         if (!sta) {
1475                 printf("handle_assoc_cb: STA " MACSTR " not found\n",
1476                        MAC2STR(mgmt->da));
1477                 return;
1478         }
1479
1480         if (status != WLAN_STATUS_SUCCESS)
1481                 goto fail;
1482
1483         /* Stop previous accounting session, if one is started, and allocate
1484          * new session id for the new session. */
1485         accounting_sta_stop(hapd, sta);
1486
1487         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1488                        HOSTAPD_LEVEL_INFO,
1489                        "associated (aid %d)",
1490                        sta->aid);
1491
1492         if (sta->flags & WLAN_STA_ASSOC)
1493                 new_assoc = 0;
1494         sta->flags |= WLAN_STA_ASSOC;
1495
1496         if (reassoc)
1497                 mlme_reassociate_indication(hapd, sta);
1498         else
1499                 mlme_associate_indication(hapd, sta);
1500
1501 #ifdef CONFIG_IEEE80211N
1502         if (sta->flags & WLAN_STA_HT)
1503                 ht_cap = &sta->ht_capabilities;
1504 #endif /* CONFIG_IEEE80211N */
1505
1506 #ifdef CONFIG_IEEE80211W
1507         sta->ping_timed_out = 0;
1508 #endif /* CONFIG_IEEE80211W */
1509
1510         if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid,
1511                             sta->capability, sta->supported_rates,
1512                             sta->supported_rates_len, 0, sta->listen_interval,
1513                             ht_cap))
1514         {
1515                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1516                                HOSTAPD_LEVEL_NOTICE,
1517                                "Could not add STA to kernel driver");
1518         }
1519
1520         if (sta->eapol_sm == NULL) {
1521                 /*
1522                  * This STA does not use RADIUS server for EAP authentication,
1523                  * so bind it to the selected VLAN interface now, since the
1524                  * interface selection is not going to change anymore.
1525                  */
1526                 ap_sta_bind_vlan(hapd, sta, 0);
1527         } else if (sta->vlan_id) {
1528                 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
1529                 ap_sta_bind_vlan(hapd, sta, 0);
1530         }
1531         if (sta->flags & WLAN_STA_SHORT_PREAMBLE) {
1532                 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
1533                                       WLAN_STA_SHORT_PREAMBLE, ~0);
1534         } else {
1535                 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
1536                                       0, ~WLAN_STA_SHORT_PREAMBLE);
1537         }
1538
1539         if (sta->auth_alg == WLAN_AUTH_FT)
1540                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
1541         else
1542                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
1543         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
1544
1545         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
1546
1547  fail:
1548         /* Copy of the association request is not needed anymore */
1549         if (sta->last_assoc_req) {
1550                 os_free(sta->last_assoc_req);
1551                 sta->last_assoc_req = NULL;
1552         }
1553 }
1554
1555
1556 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
1557                         u16 stype, int ok)
1558 {
1559         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
1560
1561         switch (stype) {
1562         case WLAN_FC_STYPE_AUTH:
1563                 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
1564                 handle_auth_cb(hapd, mgmt, len, ok);
1565                 break;
1566         case WLAN_FC_STYPE_ASSOC_RESP:
1567                 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
1568                 handle_assoc_cb(hapd, mgmt, len, 0, ok);
1569                 break;
1570         case WLAN_FC_STYPE_REASSOC_RESP:
1571                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
1572                 handle_assoc_cb(hapd, mgmt, len, 1, ok);
1573                 break;
1574         case WLAN_FC_STYPE_PROBE_RESP:
1575                 wpa_printf(MSG_DEBUG, "mgmt::proberesp cb");
1576                 break;
1577         case WLAN_FC_STYPE_DEAUTH:
1578                 /* ignore */
1579                 break;
1580         case WLAN_FC_STYPE_ACTION:
1581                 wpa_printf(MSG_DEBUG, "mgmt::action cb");
1582                 break;
1583         default:
1584                 printf("unknown mgmt cb frame subtype %d\n", stype);
1585                 break;
1586         }
1587 }
1588
1589
1590 static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
1591                                                 void *timeout_ctx)
1592 {
1593         struct hostapd_data *hapd = eloop_ctx;
1594         hapd->tkip_countermeasures = 0;
1595         hostapd_set_countermeasures(hapd, 0);
1596         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1597                        HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
1598 }
1599
1600
1601 static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
1602 {
1603         struct sta_info *sta;
1604
1605         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1606                        HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
1607
1608         wpa_auth_countermeasures_start(hapd->wpa_auth);
1609         hapd->tkip_countermeasures = 1;
1610         hostapd_set_countermeasures(hapd, 1);
1611         wpa_gtk_rekey(hapd->wpa_auth);
1612         eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
1613         eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
1614                                hapd, NULL);
1615         for (sta = hapd->sta_list; sta != NULL; sta = sta->next) {
1616                 hostapd_sta_deauth(hapd, sta->addr,
1617                                    WLAN_REASON_MICHAEL_MIC_FAILURE);
1618                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1619                                 WLAN_STA_AUTHORIZED);
1620                 hostapd_sta_remove(hapd, sta->addr);
1621         }
1622 }
1623
1624
1625 void ieee80211_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr,
1626                                    int local)
1627 {
1628         time_t now;
1629
1630         if (addr && local) {
1631                 struct sta_info *sta = ap_get_sta(hapd, addr);
1632                 if (sta != NULL) {
1633                         wpa_auth_sta_local_mic_failure_report(sta->wpa_sm);
1634                         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
1635                                        HOSTAPD_LEVEL_INFO,
1636                                        "Michael MIC failure detected in "
1637                                        "received frame");
1638                         mlme_michaelmicfailure_indication(hapd, addr);
1639                 } else {
1640                         wpa_printf(MSG_DEBUG,
1641                                    "MLME-MICHAELMICFAILURE.indication "
1642                                    "for not associated STA (" MACSTR
1643                                    ") ignored", MAC2STR(addr));
1644                         return;
1645                 }
1646         }
1647
1648         time(&now);
1649         if (now > hapd->michael_mic_failure + 60) {
1650                 hapd->michael_mic_failures = 1;
1651         } else {
1652                 hapd->michael_mic_failures++;
1653                 if (hapd->michael_mic_failures > 1)
1654                         ieee80211_tkip_countermeasures_start(hapd);
1655         }
1656         hapd->michael_mic_failure = now;
1657 }
1658
1659
1660 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1661 {
1662         /* TODO */
1663         return 0;
1664 }
1665
1666
1667 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1668                            char *buf, size_t buflen)
1669 {
1670         /* TODO */
1671         return 0;
1672 }
1673
1674 #endif /* CONFIG_NATIVE_WINDOWS */