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