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                         HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
 155         if (hapd->iconf->secondary_channel == -1)
 156                 oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW |
 157                         HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
 158
 159         pos += sizeof(*oper);
 160
 161         return pos;
 162 #else /* CONFIG_IEEE80211N */
 163         return eid;
 164 #endif /* CONFIG_IEEE80211N */
 165 }
 166
 167
 168 #ifdef CONFIG_IEEE80211N
 169
 170 /*
 171 op_mode
 172 Set to 0 (HT pure) under the followign conditions
 173         - all STAs in the BSS are 20/40 MHz HT in 20/40 MHz BSS or
 174         - all STAs in the BSS are 20 MHz HT in 20 MHz BSS
 175 Set to 1 (HT non-member protection) if there may be non-HT STAs
 176         in both the primary and the secondary channel
 177 Set to 2 if only HT STAs are associated in BSS,
 178         however and at least one 20 MHz HT STA is associated
 179 Set to 3 (HT mixed mode) when one or more non-HT STAs are associated
 180         (currently non-GF HT station is considered as non-HT STA also)
 181 */
 182 int hostapd_ht_operation_update(struct hostapd_iface *iface)
 183 {
 184         u16 cur_op_mode, new_op_mode;
 185         int op_mode_changes = 0;
 186
 187         if (!iface->conf->ieee80211n || iface->conf->ht_op_mode_fixed)
 188                 return 0;
 189
 190         wpa_printf(MSG_DEBUG, "%s current operation mode=0x%X",
 191                    __func__, iface->ht_op_mode);
 192
 193         if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT)
 194             && iface->num_sta_ht_no_gf) {
 195                 iface->ht_op_mode |=
 196                         HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
 197                 op_mode_changes++;
 198         } else if ((iface->ht_op_mode &
 199                     HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT) &&
 200                    iface->num_sta_ht_no_gf == 0) {
 201                 iface->ht_op_mode &=
 202                         ~HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
 203                 op_mode_changes++;
 204         }
 205
 206         if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
 207             (iface->num_sta_no_ht || iface->olbc_ht)) {
 208                 iface->ht_op_mode |= HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
 209                 op_mode_changes++;
 210         } else if ((iface->ht_op_mode &
 211                     HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
 212                    (iface->num_sta_no_ht == 0 && !iface->olbc_ht)) {
 213                 iface->ht_op_mode &=
 214                         ~HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
 215                 op_mode_changes++;
 216         }
 217
 218         /* Note: currently we switch to the MIXED op mode if HT non-greenfield
 219          * station is associated. Probably it's a theoretical case, since
 220          * it looks like all known HT STAs support greenfield.
 221          */
 222         new_op_mode = 0;
 223         if (iface->num_sta_no_ht ||
 224             (iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT))
 225                 new_op_mode = OP_MODE_MIXED;
 226         else if ((iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)
 227                  && iface->num_sta_ht_20mhz)
 228                 new_op_mode = OP_MODE_20MHZ_HT_STA_ASSOCED;
 229         else if (iface->olbc_ht)
 230                 new_op_mode = OP_MODE_MAY_BE_LEGACY_STAS;
 231         else
 232                 new_op_mode = OP_MODE_PURE;
 233
 234         cur_op_mode = iface->ht_op_mode & HT_INFO_OPERATION_MODE_OP_MODE_MASK;
 235         if (cur_op_mode != new_op_mode) {
 236                 iface->ht_op_mode &= ~HT_INFO_OPERATION_MODE_OP_MODE_MASK;
 237                 iface->ht_op_mode |= new_op_mode;
 238                 op_mode_changes++;
 239         }
 240
 241         wpa_printf(MSG_DEBUG, "%s new operation mode=0x%X changes=%d",
 242                    __func__, iface->ht_op_mode, op_mode_changes);
 243
 244         return op_mode_changes;
 245 }
 246
 247 #endif /* CONFIG_IEEE80211N */
 248
 249
 250 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
 251                            int probe)
 252 {
 253         int capab = WLAN_CAPABILITY_ESS;
 254         int privacy;
 255
 256         if (hapd->iface->num_sta_no_short_preamble == 0 &&
 257             hapd->iconf->preamble == SHORT_PREAMBLE)
 258                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 259
 260         privacy = hapd->conf->ssid.wep.keys_set;
 261
 262         if (hapd->conf->ieee802_1x &&
 263             (hapd->conf->default_wep_key_len ||
 264              hapd->conf->individual_wep_key_len))
 265                 privacy = 1;
 266
 267         if (hapd->conf->wpa)
 268                 privacy = 1;
 269
 270         if (sta) {
 271                 int policy, def_klen;
 272                 if (probe && sta->ssid_probe) {
 273                         policy = sta->ssid_probe->security_policy;
 274                         def_klen = sta->ssid_probe->wep.default_len;
 275                 } else {
 276                         policy = sta->ssid->security_policy;
 277                         def_klen = sta->ssid->wep.default_len;
 278                 }
 279                 privacy = policy != SECURITY_PLAINTEXT;
 280                 if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
 281                         privacy = 0;
 282         }
 283
 284         if (privacy)
 285                 capab |= WLAN_CAPABILITY_PRIVACY;
 286
 287         if (hapd->iface->current_mode &&
 288             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
 289             hapd->iface->num_sta_no_short_slot_time == 0)
 290                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 291
 292         return capab;
 293 }
 294
 295
 296 #ifdef CONFIG_IEEE80211W
 297 static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
 298                                             struct sta_info *sta, u8 *eid)
 299 {
 300         u8 *pos = eid;
 301         u32 timeout;
 302
 303         *pos++ = WLAN_EID_ASSOC_COMEBACK_TIME;
 304         *pos++ = 4;
 305         timeout = (hapd->conf->assoc_ping_attempts - sta->ping_count + 1) *
 306                 hapd->conf->assoc_ping_timeout;
 307         WPA_PUT_LE32(pos, timeout);
 308         pos += 4;
 309
 310         return pos;
 311 }
 312 #endif /* CONFIG_IEEE80211W */
 313
 314
 315 void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len)
 316 {
 317         int i;
 318         if (len > HOSTAPD_MAX_SSID_LEN)
 319                 len = HOSTAPD_MAX_SSID_LEN;
 320         for (i = 0; i < len; i++) {
 321                 if (ssid[i] >= 32 && ssid[i] < 127)
 322                         buf[i] = ssid[i];
 323                 else
 324                         buf[i] = '.';
 325         }
 326         buf[len] = '\0';
 327 }
 328
 329
 330 void ieee802_11_send_deauth(struct hostapd_data *hapd, u8 *addr, u16 reason)
 331 {
 332         struct ieee80211_mgmt mgmt;
 333
 334         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 335                        HOSTAPD_LEVEL_DEBUG,
 336                        "deauthenticate - reason %d", reason);
 337         os_memset(&mgmt, 0, sizeof(mgmt));
 338         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 339                                           WLAN_FC_STYPE_DEAUTH);
 340         os_memcpy(mgmt.da, addr, ETH_ALEN);
 341         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 342         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 343         mgmt.u.deauth.reason_code = host_to_le16(reason);
 344         if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
 345                                     sizeof(mgmt.u.deauth), 0) < 0)
 346                 perror("ieee802_11_send_deauth: send");
 347 }
 348
 349
 350 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
 351                            u16 auth_transaction, u8 *challenge, int iswep)
 352 {
 353         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 354                        HOSTAPD_LEVEL_DEBUG,
 355                        "authentication (shared key, transaction %d)",
 356                        auth_transaction);
 357
 358         if (auth_transaction == 1) {
 359                 if (!sta->challenge) {
 360                         /* Generate a pseudo-random challenge */
 361                         u8 key[8];
 362                         time_t now;
 363                         int r;
 364                         sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
 365                         if (sta->challenge == NULL)
 366                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 367
 368                         now = time(NULL);
 369                         r = random();
 370                         os_memcpy(key, &now, 4);
 371                         os_memcpy(key + 4, &r, 4);
 372                         rc4(sta->challenge, WLAN_AUTH_CHALLENGE_LEN,
 373                             key, sizeof(key));
 374                 }
 375                 return 0;
 376         }
 377
 378         if (auth_transaction != 3)
 379                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 380
 381         /* Transaction 3 */
 382         if (!iswep || !sta->challenge || !challenge ||
 383             os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
 384                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 385                                HOSTAPD_LEVEL_INFO,
 386                                "shared key authentication - invalid "
 387                                "challenge-response");
 388                 return WLAN_STATUS_CHALLENGE_FAIL;
 389         }
 390
 391         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 392                        HOSTAPD_LEVEL_DEBUG,
 393                        "authentication OK (shared key)");
 394 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 395         /* Station will be marked authenticated if it ACKs the
 396          * authentication reply. */
 397 #else
 398         sta->flags |= WLAN_STA_AUTH;
 399         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 400 #endif
 401         os_free(sta->challenge);
 402         sta->challenge = NULL;
 403
 404         return 0;
 405 }
 406
 407
 408 static void send_auth_reply(struct hostapd_data *hapd,
 409                             const u8 *dst, const u8 *bssid,
 410                             u16 auth_alg, u16 auth_transaction, u16 resp,
 411                             const u8 *ies, size_t ies_len)
 412 {
 413         struct ieee80211_mgmt *reply;
 414         u8 *buf;
 415         size_t rlen;
 416
 417         rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
 418         buf = os_zalloc(rlen);
 419         if (buf == NULL)
 420                 return;
 421
 422         reply = (struct ieee80211_mgmt *) buf;
 423         reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 424                                             WLAN_FC_STYPE_AUTH);
 425         os_memcpy(reply->da, dst, ETH_ALEN);
 426         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
 427         os_memcpy(reply->bssid, bssid, ETH_ALEN);
 428
 429         reply->u.auth.auth_alg = host_to_le16(auth_alg);
 430         reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
 431         reply->u.auth.status_code = host_to_le16(resp);
 432
 433         if (ies && ies_len)
 434                 os_memcpy(reply->u.auth.variable, ies, ies_len);
 435
 436         wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
 437                    " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
 438                    MAC2STR(dst), auth_alg, auth_transaction,
 439                    resp, (unsigned long) ies_len);
 440         if (hostapd_send_mgmt_frame(hapd, reply, rlen, 0) < 0)
 441                 perror("send_auth_reply: send");
 442
 443         os_free(buf);
 444 }
 445
 446
 447 #ifdef CONFIG_IEEE80211R
 448 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
 449                                   u16 auth_transaction, u16 status,
 450                                   const u8 *ies, size_t ies_len)
 451 {
 452         struct hostapd_data *hapd = ctx;
 453         struct sta_info *sta;
 454
 455         send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
 456                         status, ies, ies_len);
 457
 458         if (status != WLAN_STATUS_SUCCESS)
 459                 return;
 460
 461         sta = ap_get_sta(hapd, dst);
 462         if (sta == NULL)
 463                 return;
 464
 465         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
 466                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
 467         sta->flags |= WLAN_STA_AUTH;
 468         mlme_authenticate_indication(hapd, sta);
 469 }
 470 #endif /* CONFIG_IEEE80211R */
 471
 472
 473 static void handle_auth(struct hostapd_data *hapd, struct ieee80211_mgmt *mgmt,
 474                         size_t len)
 475 {
 476         u16 auth_alg, auth_transaction, status_code;
 477         u16 resp = WLAN_STATUS_SUCCESS;
 478         struct sta_info *sta = NULL;
 479         int res;
 480         u16 fc;
 481         u8 *challenge = NULL;
 482         u32 session_timeout, acct_interim_interval;
 483         int vlan_id = 0;
 484         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
 485         size_t resp_ies_len = 0;
 486
 487         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
 488                 printf("handle_auth - too short payload (len=%lu)\n",
 489                        (unsigned long) len);
 490                 return;
 491         }
 492
 493         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
 494         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
 495         status_code = le_to_host16(mgmt->u.auth.status_code);
 496         fc = le_to_host16(mgmt->frame_control);
 497
 498         if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
 499             2 + WLAN_AUTH_CHALLENGE_LEN &&
 500             mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
 501             mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
 502                 challenge = &mgmt->u.auth.variable[2];
 503
 504         wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
 505                    "auth_transaction=%d status_code=%d wep=%d%s",
 506                    MAC2STR(mgmt->sa), auth_alg, auth_transaction,
 507                    status_code, !!(fc & WLAN_FC_ISWEP),
 508                    challenge ? " challenge" : "");
 509
 510         if (hapd->tkip_countermeasures) {
 511                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 512                 goto fail;
 513         }
 514
 515         if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
 516                auth_alg == WLAN_AUTH_OPEN) ||
 517 #ifdef CONFIG_IEEE80211R
 518               (hapd->conf->wpa &&
 519                (hapd->conf->wpa_key_mgmt &
 520                 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
 521                auth_alg == WLAN_AUTH_FT) ||
 522 #endif /* CONFIG_IEEE80211R */
 523               ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
 524                auth_alg == WLAN_AUTH_SHARED_KEY))) {
 525                 printf("Unsupported authentication algorithm (%d)\n",
 526                        auth_alg);
 527                 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
 528                 goto fail;
 529         }
 530
 531         if (!(auth_transaction == 1 ||
 532               (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
 533                 printf("Unknown authentication transaction number (%d)\n",
 534                        auth_transaction);
 535                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 536                 goto fail;
 537         }
 538
 539         if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
 540                 printf("Station " MACSTR " not allowed to authenticate.\n",
 541                        MAC2STR(mgmt->sa));
 542                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 543                 goto fail;
 544         }
 545
 546         res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
 547                                       &session_timeout,
 548                                       &acct_interim_interval, &vlan_id);
 549         if (res == HOSTAPD_ACL_REJECT) {
 550                 printf("Station " MACSTR " not allowed to authenticate.\n",
 551                        MAC2STR(mgmt->sa));
 552                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 553                 goto fail;
 554         }
 555         if (res == HOSTAPD_ACL_PENDING) {
 556                 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
 557                            " waiting for an external authentication",
 558                            MAC2STR(mgmt->sa));
 559                 /* Authentication code will re-send the authentication frame
 560                  * after it has received (and cached) information from the
 561                  * external source. */
 562                 return;
 563         }
 564
 565         sta = ap_sta_add(hapd, mgmt->sa);
 566         if (!sta) {
 567                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 568                 goto fail;
 569         }
 570
 571         if (vlan_id > 0) {
 572                 if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 573                                                sta->vlan_id) == NULL) {
 574                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 575                                        HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
 576                                        "%d received from RADIUS server",
 577                                        vlan_id);
 578                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 579                         goto fail;
 580                 }
 581                 sta->vlan_id = vlan_id;
 582                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 583                                HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
 584         }
 585
 586         sta->flags &= ~WLAN_STA_PREAUTH;
 587         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
 588
 589         if (hapd->conf->radius->acct_interim_interval == 0 &&
 590             acct_interim_interval)
 591                 sta->acct_interim_interval = acct_interim_interval;
 592         if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
 593                 ap_sta_session_timeout(hapd, sta, session_timeout);
 594         else
 595                 ap_sta_no_session_timeout(hapd, sta);
 596
 597         switch (auth_alg) {
 598         case WLAN_AUTH_OPEN:
 599                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 600                                HOSTAPD_LEVEL_DEBUG,
 601                                "authentication OK (open system)");
 602 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 603                 /* Station will be marked authenticated if it ACKs the
 604                  * authentication reply. */
 605 #else
 606                 sta->flags |= WLAN_STA_AUTH;
 607                 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 608                 sta->auth_alg = WLAN_AUTH_OPEN;
 609                 mlme_authenticate_indication(hapd, sta);
 610 #endif
 611                 break;
 612         case WLAN_AUTH_SHARED_KEY:
 613                 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
 614                                        fc & WLAN_FC_ISWEP);
 615                 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
 616                 mlme_authenticate_indication(hapd, sta);
 617                 if (sta->challenge && auth_transaction == 1) {
 618                         resp_ies[0] = WLAN_EID_CHALLENGE;
 619                         resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
 620                         os_memcpy(resp_ies + 2, sta->challenge,
 621                                   WLAN_AUTH_CHALLENGE_LEN);
 622                         resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
 623                 }
 624                 break;
 625 #ifdef CONFIG_IEEE80211R
 626         case WLAN_AUTH_FT:
 627                 sta->auth_alg = WLAN_AUTH_FT;
 628                 if (sta->wpa_sm == NULL)
 629                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 630                                                         sta->addr);
 631                 if (sta->wpa_sm == NULL) {
 632                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
 633                                    "state machine");
 634                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 635                         goto fail;
 636                 }
 637                 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
 638                                     auth_transaction, mgmt->u.auth.variable,
 639                                     len - IEEE80211_HDRLEN -
 640                                     sizeof(mgmt->u.auth),
 641                                     handle_auth_ft_finish, hapd);
 642                 /* handle_auth_ft_finish() callback will complete auth. */
 643                 return;
 644 #endif /* CONFIG_IEEE80211R */
 645         }
 646
 647  fail:
 648         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
 649                         auth_transaction + 1, resp, resp_ies, resp_ies_len);
 650 }
 651
 652
 653 static void handle_assoc(struct hostapd_data *hapd,
 654                          struct ieee80211_mgmt *mgmt, size_t len, int reassoc)
 655 {
 656         u16 capab_info, listen_interval;
 657         u16 resp = WLAN_STATUS_SUCCESS;
 658         u8 *pos, *wpa_ie;
 659         size_t wpa_ie_len;
 660         int send_deauth = 0, send_len, left, i;
 661         struct sta_info *sta;
 662         struct ieee802_11_elems elems;
 663         u8 buf[sizeof(struct ieee80211_mgmt) + 512];
 664         struct ieee80211_mgmt *reply;
 665
 666         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
 667                                       sizeof(mgmt->u.assoc_req))) {
 668                 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
 669                        "\n", reassoc, (unsigned long) len);
 670                 return;
 671         }
 672
 673         if (reassoc) {
 674                 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
 675                 listen_interval = le_to_host16(
 676                         mgmt->u.reassoc_req.listen_interval);
 677                 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
 678                            " capab_info=0x%02x listen_interval=%d current_ap="
 679                            MACSTR,
 680                            MAC2STR(mgmt->sa), capab_info, listen_interval,
 681                            MAC2STR(mgmt->u.reassoc_req.current_ap));
 682                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
 683                 pos = mgmt->u.reassoc_req.variable;
 684         } else {
 685                 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
 686                 listen_interval = le_to_host16(
 687                         mgmt->u.assoc_req.listen_interval);
 688                 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
 689                            " capab_info=0x%02x listen_interval=%d",
 690                            MAC2STR(mgmt->sa), capab_info, listen_interval);
 691                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
 692                 pos = mgmt->u.assoc_req.variable;
 693         }
 694
 695         sta = ap_get_sta(hapd, mgmt->sa);
 696 #ifdef CONFIG_IEEE80211R
 697         if (sta && sta->auth_alg == WLAN_AUTH_FT &&
 698             (sta->flags & WLAN_STA_AUTH) == 0) {
 699                 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
 700                            "prior to authentication since it is using "
 701                            "over-the-DS FT", MAC2STR(mgmt->sa));
 702         } else
 703 #endif /* CONFIG_IEEE80211R */
 704         if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
 705                 printf("STA " MACSTR " trying to associate before "
 706                        "authentication\n", MAC2STR(mgmt->sa));
 707                 if (sta) {
 708                         printf("  sta: addr=" MACSTR " aid=%d flags=0x%04x\n",
 709                                MAC2STR(sta->addr), sta->aid, sta->flags);
 710                 }
 711                 send_deauth = 1;
 712                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 713                 goto fail;
 714         }
 715
 716         if (hapd->tkip_countermeasures) {
 717                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 718                 goto fail;
 719         }
 720
 721         if (listen_interval > hapd->conf->max_listen_interval) {
 722                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 723                                HOSTAPD_LEVEL_DEBUG,
 724                                "Too large Listen Interval (%d)",
 725                                listen_interval);
 726                 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
 727                 goto fail;
 728         }
 729
 730         sta->capability = capab_info;
 731         sta->listen_interval = listen_interval;
 732
 733         /* followed by SSID and Supported rates; and HT capabilities if 802.11n
 734          * is used */
 735         if (ieee802_11_parse_elems(pos, left, &elems, 1) == ParseFailed ||
 736             !elems.ssid) {
 737                 printf("STA " MACSTR " sent invalid association request\n",
 738                        MAC2STR(sta->addr));
 739                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 740                 goto fail;
 741         }
 742
 743         if (elems.ssid_len != hapd->conf->ssid.ssid_len ||
 744             os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) != 0)
 745         {
 746                 char ssid_txt[33];
 747                 ieee802_11_print_ssid(ssid_txt, elems.ssid, elems.ssid_len);
 748                 printf("Station " MACSTR " tried to associate with "
 749                        "unknown SSID '%s'\n", MAC2STR(sta->addr), ssid_txt);
 750                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 751                 goto fail;
 752         }
 753
 754         sta->flags &= ~WLAN_STA_WME;
 755         if (elems.wme && hapd->conf->wme_enabled) {
 756                 if (hostapd_eid_wme_valid(hapd, elems.wme, elems.wme_len))
 757                         hostapd_logger(hapd, sta->addr,
 758                                        HOSTAPD_MODULE_WPA,
 759                                        HOSTAPD_LEVEL_DEBUG,
 760                                        "invalid WME element in association "
 761                                        "request");
 762                 else
 763                         sta->flags |= WLAN_STA_WME;
 764         }
 765
 766         if (!elems.supp_rates) {
 767                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 768                                HOSTAPD_LEVEL_DEBUG,
 769                                "No supported rates element in AssocReq");
 770                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 771                 goto fail;
 772         }
 773
 774         if (elems.supp_rates_len > sizeof(sta->supported_rates)) {
 775                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 776                                HOSTAPD_LEVEL_DEBUG,
 777                                "Invalid supported rates element length %d",
 778                                elems.supp_rates_len);
 779                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 780                 goto fail;
 781         }
 782
 783         os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
 784         os_memcpy(sta->supported_rates, elems.supp_rates,
 785                   elems.supp_rates_len);
 786         sta->supported_rates_len = elems.supp_rates_len;
 787
 788         if (elems.ext_supp_rates) {
 789                 if (elems.supp_rates_len + elems.ext_supp_rates_len >
 790                     sizeof(sta->supported_rates)) {
 791                         hostapd_logger(hapd, mgmt->sa,
 792                                        HOSTAPD_MODULE_IEEE80211,
 793                                        HOSTAPD_LEVEL_DEBUG,
 794                                        "Invalid supported rates element length"
 795                                        " %d+%d", elems.supp_rates_len,
 796                                        elems.ext_supp_rates_len);
 797                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 798                         goto fail;
 799                 }
 800
 801                 os_memcpy(sta->supported_rates + elems.supp_rates_len,
 802                           elems.ext_supp_rates, elems.ext_supp_rates_len);
 803                 sta->supported_rates_len += elems.ext_supp_rates_len;
 804         }
 805
 806 #ifdef CONFIG_IEEE80211N
 807         /* save HT capabilities in the sta object */
 808         os_memset(&sta->ht_capabilities, 0, sizeof(sta->ht_capabilities));
 809         if (elems.ht_capabilities &&
 810             elems.ht_capabilities_len >= sizeof(struct ieee80211_ht_capability)
 811             && (sta->flags & WLAN_STA_WME)) {
 812                 /* note: without WMM capability, treat the sta as non-HT */
 813                 sta->flags |= WLAN_STA_HT;
 814                 sta->ht_capabilities.id = WLAN_EID_HT_CAP;
 815                 sta->ht_capabilities.length =
 816                         sizeof(struct ieee80211_ht_capability);
 817                 os_memcpy(&sta->ht_capabilities.data,
 818                           elems.ht_capabilities,
 819                           sizeof(struct ieee80211_ht_capability));
 820         } else
 821                 sta->flags &= ~WLAN_STA_HT;
 822 #endif /* CONFIG_IEEE80211N */
 823
 824         if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
 825                 wpa_ie = elems.rsn_ie;
 826                 wpa_ie_len = elems.rsn_ie_len;
 827         } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
 828                    elems.wpa_ie) {
 829                 wpa_ie = elems.wpa_ie;
 830                 wpa_ie_len = elems.wpa_ie_len;
 831         } else {
 832                 wpa_ie = NULL;
 833                 wpa_ie_len = 0;
 834         }
 835 #ifdef CONFIG_WPS
 836         if (hapd->conf->wps_state && wpa_ie == NULL) {
 837                 if (elems.wps_ie) {
 838                         wpa_printf(MSG_DEBUG, "STA included WPS IE in "
 839                                    "(Re)Association Request - assume WPS is "
 840                                    "used");
 841                         sta->flags |= WLAN_STA_WPS;
 842                 } else {
 843                         wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE "
 844                                    "in (Re)Association Request - possible WPS "
 845                                    "use");
 846                         sta->flags |= WLAN_STA_MAYBE_WPS;
 847                 }
 848         } else
 849 #endif /* CONFIG_WPS */
 850         if (hapd->conf->wpa && wpa_ie == NULL) {
 851                 printf("STA " MACSTR ": No WPA/RSN IE in association "
 852                        "request\n", MAC2STR(sta->addr));
 853                 resp = WLAN_STATUS_INVALID_IE;
 854                 goto fail;
 855         }
 856
 857         if (hapd->conf->wpa && wpa_ie) {
 858                 int res;
 859                 wpa_ie -= 2;
 860                 wpa_ie_len += 2;
 861                 if (sta->wpa_sm == NULL)
 862                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 863                                                         sta->addr);
 864                 if (sta->wpa_sm == NULL) {
 865                         printf("Failed to initialize WPA state machine\n");
 866                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 867                         goto fail;
 868                 }
 869                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 870                                           wpa_ie, wpa_ie_len,
 871                                           elems.mdie, elems.mdie_len);
 872                 if (res == WPA_INVALID_GROUP)
 873                         resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
 874                 else if (res == WPA_INVALID_PAIRWISE)
 875                         resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
 876                 else if (res == WPA_INVALID_AKMP)
 877                         resp = WLAN_STATUS_AKMP_NOT_VALID;
 878                 else if (res == WPA_ALLOC_FAIL)
 879                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 880 #ifdef CONFIG_IEEE80211W
 881                 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
 882                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE; /* FIX */
 883                 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
 884                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE; /* FIX */
 885 #endif /* CONFIG_IEEE80211W */
 886                 else if (res == WPA_INVALID_MDIE)
 887                         resp = WLAN_STATUS_INVALID_MDIE;
 888                 else if (res != WPA_IE_OK)
 889                         resp = WLAN_STATUS_INVALID_IE;
 890                 if (resp != WLAN_STATUS_SUCCESS)
 891                         goto fail;
 892 #ifdef CONFIG_IEEE80211W
 893                 if ((sta->flags & WLAN_STA_MFP) && !sta->ping_timed_out) {
 894                         /*
 895                          * STA has already been associated with MFP and ping
 896                          * timeout has not been reached. Reject the
 897                          * association attempt temporarily and start ping, if
 898                          * one is not pending.
 899                          */
 900
 901                         if (sta->ping_count == 0)
 902                                 ap_sta_start_ping(hapd, sta);
 903
 904                         resp = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
 905                         goto fail;
 906                 }
 907
 908                 if (wpa_auth_uses_mfp(sta->wpa_sm))
 909                         sta->flags |= WLAN_STA_MFP;
 910                 else
 911                         sta->flags &= ~WLAN_STA_MFP;
 912 #endif /* CONFIG_IEEE80211W */
 913
 914 #ifdef CONFIG_IEEE80211R
 915                 if (sta->auth_alg == WLAN_AUTH_FT) {
 916                         if (!reassoc) {
 917                                 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
 918                                            "to use association (not "
 919                                            "re-association) with FT auth_alg",
 920                                            MAC2STR(sta->addr));
 921                                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 922                                 goto fail;
 923                         }
 924
 925                         resp = wpa_ft_validate_reassoc(sta->wpa_sm, pos, left);
 926                         if (resp != WLAN_STATUS_SUCCESS)
 927                                 goto fail;
 928                 }
 929 #endif /* CONFIG_IEEE80211R */
 930         }
 931
 932         if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 933                 sta->flags |= WLAN_STA_NONERP;
 934         for (i = 0; i < sta->supported_rates_len; i++) {
 935                 if ((sta->supported_rates[i] & 0x7f) > 22) {
 936                         sta->flags &= ~WLAN_STA_NONERP;
 937                         break;
 938                 }
 939         }
 940         if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
 941                 sta->nonerp_set = 1;
 942                 hapd->iface->num_sta_non_erp++;
 943                 if (hapd->iface->num_sta_non_erp == 1)
 944                         ieee802_11_set_beacons(hapd->iface);
 945         }
 946
 947         if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
 948             !sta->no_short_slot_time_set) {
 949                 sta->no_short_slot_time_set = 1;
 950                 hapd->iface->num_sta_no_short_slot_time++;
 951                 if (hapd->iface->current_mode->mode ==
 952                     HOSTAPD_MODE_IEEE80211G &&
 953                     hapd->iface->num_sta_no_short_slot_time == 1)
 954                         ieee802_11_set_beacons(hapd->iface);
 955         }
 956
 957         if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
 958                 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 959         else
 960                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 961
 962         if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
 963             !sta->no_short_preamble_set) {
 964                 sta->no_short_preamble_set = 1;
 965                 hapd->iface->num_sta_no_short_preamble++;
 966                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 967                     && hapd->iface->num_sta_no_short_preamble == 1)
 968                         ieee802_11_set_beacons(hapd->iface);
 969         }
 970
 971 #ifdef CONFIG_IEEE80211N
 972         if (sta->flags & WLAN_STA_HT) {
 973                 u16 ht_capab = le_to_host16(
 974                         sta->ht_capabilities.data.capabilities_info);
 975                 wpa_printf(MSG_DEBUG, "HT: STA " MACSTR " HT Capabilities "
 976                            "Info: 0x%04x", MAC2STR(sta->addr), ht_capab);
 977                 if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0) {
 978                         hapd->iface->num_sta_ht_no_gf++;
 979                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no "
 980                                    "greenfield, num of non-gf stations %d",
 981                                    __func__, MAC2STR(sta->addr),
 982                                    hapd->iface->num_sta_ht_no_gf);
 983                 }
 984                 if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0) {
 985                         hapd->iface->num_sta_ht_20mhz++;
 986                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - 20 MHz HT, "
 987                                    "num of 20MHz HT STAs %d",
 988                                    __func__, MAC2STR(sta->addr),
 989                                    hapd->iface->num_sta_ht_20mhz);
 990                 }
 991         } else {
 992                 hapd->iface->num_sta_no_ht++;
 993                 if (hapd->iconf->ieee80211n) {
 994                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR
 995                                    " - no HT, num of non-HT stations %d",
 996                                    __func__, MAC2STR(sta->addr),
 997                                    hapd->iface->num_sta_no_ht);
 998                 }
 999         }
1000
1001         if (hostapd_ht_operation_update(hapd->iface) > 0)
1002                 ieee802_11_set_beacons(hapd->iface);
1003 #endif /* CONFIG_IEEE80211N */
1004
1005         /* get a unique AID */
1006         if (sta->aid > 0) {
1007                 wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
1008         } else {
1009                 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1010                         if (hapd->sta_aid[sta->aid - 1] == NULL)
1011                                 break;
1012                 if (sta->aid > MAX_AID_TABLE_SIZE) {
1013                         sta->aid = 0;
1014                         resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1015                         wpa_printf(MSG_ERROR, "  no room for more AIDs");
1016                         goto fail;
1017                 } else {
1018                         hapd->sta_aid[sta->aid - 1] = sta;
1019                         wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
1020                 }
1021         }
1022
1023         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1024                        HOSTAPD_LEVEL_DEBUG,
1025                        "association OK (aid %d)", sta->aid);
1026         /* Station will be marked associated, after it acknowledges AssocResp
1027          */
1028
1029         if (reassoc) {
1030                 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap,
1031                           ETH_ALEN);
1032         }
1033
1034         if (sta->last_assoc_req)
1035                 os_free(sta->last_assoc_req);
1036         sta->last_assoc_req = os_malloc(len);
1037         if (sta->last_assoc_req)
1038                 os_memcpy(sta->last_assoc_req, mgmt, len);
1039
1040         /* Make sure that the previously registered inactivity timer will not
1041          * remove the STA immediately. */
1042         sta->timeout_next = STA_NULLFUNC;
1043
1044  fail:
1045         os_memset(buf, 0, sizeof(buf));
1046         reply = (struct ieee80211_mgmt *) buf;
1047         reply->frame_control =
1048                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1049                              (send_deauth ? WLAN_FC_STYPE_DEAUTH :
1050                               (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1051                                WLAN_FC_STYPE_ASSOC_RESP)));
1052         os_memcpy(reply->da, mgmt->sa, ETH_ALEN);
1053         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
1054         os_memcpy(reply->bssid, mgmt->bssid, ETH_ALEN);
1055
1056         send_len = IEEE80211_HDRLEN;
1057         if (send_deauth) {
1058                 send_len += sizeof(reply->u.deauth);
1059                 reply->u.deauth.reason_code = host_to_le16(resp);
1060         } else {
1061                 u8 *p;
1062                 send_len += sizeof(reply->u.assoc_resp);
1063                 reply->u.assoc_resp.capab_info =
1064                         host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
1065                 reply->u.assoc_resp.status_code = host_to_le16(resp);
1066                 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
1067                                                        | BIT(14) | BIT(15));
1068                 /* Supported rates */
1069                 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
1070                 /* Extended supported rates */
1071                 p = hostapd_eid_ext_supp_rates(hapd, p);
1072                 if (sta->flags & WLAN_STA_WME)
1073                         p = hostapd_eid_wme(hapd, p);
1074
1075                 p = hostapd_eid_ht_capabilities_info(hapd, p);
1076                 p = hostapd_eid_ht_operation(hapd, p);
1077
1078 #ifdef CONFIG_IEEE80211R
1079                 if (resp == WLAN_STATUS_SUCCESS) {
1080                         /* IEEE 802.11r: Mobility Domain Information, Fast BSS
1081                          * Transition Information, RSN */
1082                         p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
1083                                                         buf + sizeof(buf) - p,
1084                                                         sta->auth_alg);
1085                 }
1086 #endif /* CONFIG_IEEE80211R */
1087
1088 #ifdef CONFIG_IEEE80211W
1089                 if (resp == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
1090                         p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
1091 #endif /* CONFIG_IEEE80211W */
1092
1093                 send_len += p - reply->u.assoc_resp.variable;
1094         }
1095
1096         if (hostapd_send_mgmt_frame(hapd, reply, send_len, 0) < 0)
1097                 perror("handle_assoc: send");
1098 }
1099
1100
1101 static void handle_disassoc(struct hostapd_data *hapd,
1102                             struct ieee80211_mgmt *mgmt, size_t len)
1103 {
1104         struct sta_info *sta;
1105
1106         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1107                 printf("handle_disassoc - too short payload (len=%lu)\n",
1108                        (unsigned long) len);
1109                 return;
1110         }
1111
1112         wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1113                    MAC2STR(mgmt->sa),
1114                    le_to_host16(mgmt->u.disassoc.reason_code));
1115
1116         sta = ap_get_sta(hapd, mgmt->sa);
1117         if (sta == NULL) {
1118                 printf("Station " MACSTR " trying to disassociate, but it "
1119                        "is not associated.\n", MAC2STR(mgmt->sa));
1120                 return;
1121         }
1122
1123         sta->flags &= ~WLAN_STA_ASSOC;
1124         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1125         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1126                        HOSTAPD_LEVEL_INFO, "disassociated");
1127         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1128         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1129         /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1130          * authenticated. */
1131         accounting_sta_stop(hapd, sta);
1132         ieee802_1x_free_station(sta);
1133         hostapd_sta_remove(hapd, sta->addr);
1134
1135         if (sta->timeout_next == STA_NULLFUNC ||
1136             sta->timeout_next == STA_DISASSOC) {
1137                 sta->timeout_next = STA_DEAUTH;
1138                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1139                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1140                                        hapd, sta);
1141         }
1142
1143         mlme_disassociate_indication(
1144                 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1145 }
1146
1147
1148 static void handle_deauth(struct hostapd_data *hapd,
1149                           struct ieee80211_mgmt *mgmt, size_t len)
1150 {
1151         struct sta_info *sta;
1152
1153         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1154                 printf("handle_deauth - too short payload (len=%lu)\n",
1155                        (unsigned long) len);
1156                 return;
1157         }
1158
1159         wpa_printf(MSG_DEBUG, "deauthentication: STA=" MACSTR
1160                    " reason_code=%d",
1161                    MAC2STR(mgmt->sa),
1162                    le_to_host16(mgmt->u.deauth.reason_code));
1163
1164         sta = ap_get_sta(hapd, mgmt->sa);
1165         if (sta == NULL) {
1166                 printf("Station " MACSTR " trying to deauthenticate, but it "
1167                        "is not authenticated.\n", MAC2STR(mgmt->sa));
1168                 return;
1169         }
1170
1171         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1172         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1173         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1174                        HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1175         mlme_deauthenticate_indication(
1176                 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1177         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1178         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1179         ap_free_sta(hapd, sta);
1180 }
1181
1182
1183 static void handle_beacon(struct hostapd_data *hapd,
1184                           struct ieee80211_mgmt *mgmt, size_t len,
1185                           struct hostapd_frame_info *fi)
1186 {
1187         struct ieee802_11_elems elems;
1188
1189         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1190                 printf("handle_beacon - too short payload (len=%lu)\n",
1191                        (unsigned long) len);
1192                 return;
1193         }
1194
1195         (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1196                                       len - (IEEE80211_HDRLEN +
1197                                              sizeof(mgmt->u.beacon)), &elems,
1198                                       0);
1199
1200         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1201 }
1202
1203
1204 #ifdef CONFIG_IEEE80211W
1205 static void hostapd_ping_action(struct hostapd_data *hapd,
1206                                 struct ieee80211_mgmt *mgmt, size_t len)
1207 {
1208         struct sta_info *sta;
1209         u8 *end;
1210         int i;
1211
1212         end = mgmt->u.action.u.ping_resp.trans_id + WLAN_PING_TRANS_ID_LEN;
1213         if (((u8 *) mgmt) + len < end) {
1214                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short Ping Action "
1215                            "frame (len=%lu)", (unsigned long) len);
1216                 return;
1217         }
1218
1219         if (mgmt->u.action.u.ping_resp.action != WLAN_PING_RESPONSE) {
1220                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected Ping Action %d",
1221                            mgmt->u.action.u.ping_resp.action);
1222                 return;
1223         }
1224
1225         /* MLME-PING.confirm */
1226
1227         sta = ap_get_sta(hapd, mgmt->sa);
1228         if (sta == NULL || sta->ping_trans_id == NULL) {
1229                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
1230                            "pending ping request found");
1231                 return;
1232         }
1233
1234         for (i = 0; i < sta->ping_count; i++) {
1235                 if (os_memcmp(sta->ping_trans_id + i * WLAN_PING_TRANS_ID_LEN,
1236                               mgmt->u.action.u.ping_resp.trans_id,
1237                               WLAN_PING_TRANS_ID_LEN) == 0)
1238                         break;
1239         }
1240
1241         if (i >= sta->ping_count) {
1242                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching ping "
1243                            "transaction identifier found");
1244                 return;
1245         }
1246
1247         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1248                        HOSTAPD_LEVEL_DEBUG, "Reply to pending ping received");
1249         ap_sta_stop_ping(hapd, sta);
1250 }
1251 #endif /* CONFIG_IEEE80211W */
1252
1253
1254 static void handle_action(struct hostapd_data *hapd,
1255                           struct ieee80211_mgmt *mgmt, size_t len)
1256 {
1257         if (len < IEEE80211_HDRLEN + 1) {
1258                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1259                                HOSTAPD_LEVEL_DEBUG,
1260                                "handle_action - too short payload (len=%lu)",
1261                                (unsigned long) len);
1262                 return;
1263         }
1264
1265         switch (mgmt->u.action.category) {
1266 #ifdef CONFIG_IEEE80211R
1267         case WLAN_ACTION_FT:
1268         {
1269                 struct sta_info *sta;
1270
1271                 sta = ap_get_sta(hapd, mgmt->sa);
1272                 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
1273                         wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action "
1274                                    "frame from unassociated STA " MACSTR,
1275                                    MAC2STR(mgmt->sa));
1276                         return;
1277                 }
1278
1279                 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
1280                                      len - IEEE80211_HDRLEN))
1281                         break;
1282
1283                 return;
1284         }
1285 #endif /* CONFIG_IEEE80211R */
1286         case WLAN_ACTION_WMM:
1287                 hostapd_wme_action(hapd, mgmt, len);
1288                 return;
1289 #ifdef CONFIG_IEEE80211W
1290         case WLAN_ACTION_PING:
1291                 hostapd_ping_action(hapd, mgmt, len);
1292                 return;
1293 #endif /* CONFIG_IEEE80211W */
1294         }
1295
1296         hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1297                        HOSTAPD_LEVEL_DEBUG,
1298                        "handle_action - unknown action category %d or invalid "
1299                        "frame",
1300                        mgmt->u.action.category);
1301         if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
1302             !(mgmt->sa[0] & 0x01)) {
1303                 /*
1304                  * IEEE 802.11-REVma/D9.0 - 7.3.1.11
1305                  * Return the Action frame to the source without change
1306                  * except that MSB of the Category set to 1.
1307                  */
1308                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
1309                            "frame back to sender");
1310                 os_memcpy(mgmt->da, mgmt->sa, ETH_ALEN);
1311                 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
1312                 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
1313                 mgmt->u.action.category |= 0x80;
1314
1315                 hostapd_send_mgmt_frame(hapd, mgmt, len, 0);
1316         }
1317 }
1318
1319
1320 /**
1321  * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
1322  * @hapd: hostapd BSS data structure (the BSS to which the management frame was
1323  * sent to)
1324  * @buf: management frame data (starting from IEEE 802.11 header)
1325  * @len: length of frame data in octets
1326  * @stype: management frame subtype from frame control field
1327  *
1328  * Process all incoming IEEE 802.11 management frames. This will be called for
1329  * each frame received from the kernel driver through wlan#ap interface. In
1330  * addition, it can be called to re-inserted pending frames (e.g., when using
1331  * external RADIUS server as an MAC ACL).
1332  */
1333 void ieee802_11_mgmt(struct hostapd_data *hapd, u8 *buf, size_t len, u16 stype,
1334                      struct hostapd_frame_info *fi)
1335 {
1336         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
1337         int broadcast;
1338
1339         if (stype == WLAN_FC_STYPE_BEACON) {
1340                 handle_beacon(hapd, mgmt, len, fi);
1341                 return;
1342         }
1343
1344         if (fi && fi->passive_scan)
1345                 return;
1346
1347         broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
1348                 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
1349                 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
1350
1351         if (!broadcast &&
1352             os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
1353                 printf("MGMT: BSSID=" MACSTR " not our address\n",
1354                        MAC2STR(mgmt->bssid));
1355                 return;
1356         }
1357
1358
1359         if (stype == WLAN_FC_STYPE_PROBE_REQ) {
1360                 handle_probe_req(hapd, mgmt, len);
1361                 return;
1362         }
1363
1364         if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
1365                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1366                                HOSTAPD_LEVEL_DEBUG,
1367                                "MGMT: DA=" MACSTR " not our address",
1368                                MAC2STR(mgmt->da));
1369                 return;
1370         }
1371
1372         switch (stype) {
1373         case WLAN_FC_STYPE_AUTH:
1374                 wpa_printf(MSG_DEBUG, "mgmt::auth");
1375                 handle_auth(hapd, mgmt, len);
1376                 break;
1377         case WLAN_FC_STYPE_ASSOC_REQ:
1378                 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
1379                 handle_assoc(hapd, mgmt, len, 0);
1380                 break;
1381         case WLAN_FC_STYPE_REASSOC_REQ:
1382                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
1383                 handle_assoc(hapd, mgmt, len, 1);
1384                 break;
1385         case WLAN_FC_STYPE_DISASSOC:
1386                 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
1387                 handle_disassoc(hapd, mgmt, len);
1388                 break;
1389         case WLAN_FC_STYPE_DEAUTH:
1390                 wpa_printf(MSG_DEBUG, "mgmt::deauth");
1391                 handle_deauth(hapd, mgmt, len);
1392                 break;
1393         case WLAN_FC_STYPE_ACTION:
1394                 wpa_printf(MSG_DEBUG, "mgmt::action");
1395                 handle_action(hapd, mgmt, len);
1396                 break;
1397         default:
1398                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1399                                HOSTAPD_LEVEL_DEBUG,
1400                                "unknown mgmt frame subtype %d", stype);
1401                 break;
1402         }
1403 }
1404
1405
1406 static void handle_auth_cb(struct hostapd_data *hapd,
1407                            struct ieee80211_mgmt *mgmt,
1408                            size_t len, int ok)
1409 {
1410         u16 auth_alg, auth_transaction, status_code;
1411         struct sta_info *sta;
1412
1413         if (!ok) {
1414                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1415                                HOSTAPD_LEVEL_NOTICE,
1416                                "did not acknowledge authentication response");
1417                 return;
1418         }
1419
1420         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
1421                 printf("handle_auth_cb - too short payload (len=%lu)\n",
1422                        (unsigned long) len);
1423                 return;
1424         }
1425
1426         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1427         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
1428         status_code = le_to_host16(mgmt->u.auth.status_code);
1429
1430         sta = ap_get_sta(hapd, mgmt->da);
1431         if (!sta) {
1432                 printf("handle_auth_cb: STA " MACSTR " not found\n",
1433                        MAC2STR(mgmt->da));
1434                 return;
1435         }
1436
1437         if (status_code == WLAN_STATUS_SUCCESS &&
1438             ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
1439              (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
1440                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1441                                HOSTAPD_LEVEL_INFO, "authenticated");
1442                 sta->flags |= WLAN_STA_AUTH;
1443         }
1444 }
1445
1446
1447 static void handle_assoc_cb(struct hostapd_data *hapd,
1448                             struct ieee80211_mgmt *mgmt,
1449                             size_t len, int reassoc, int ok)
1450 {
1451         u16 status;
1452         struct sta_info *sta;
1453         int new_assoc = 1;
1454         struct ht_cap_ie *ht_cap = NULL;
1455
1456         if (!ok) {
1457                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1458                                HOSTAPD_LEVEL_DEBUG,
1459                                "did not acknowledge association response");
1460                 return;
1461         }
1462
1463         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
1464                                       sizeof(mgmt->u.assoc_resp))) {
1465                 printf("handle_assoc_cb(reassoc=%d) - too short payload "
1466                        "(len=%lu)\n", reassoc, (unsigned long) len);
1467                 return;
1468         }
1469
1470         if (reassoc)
1471                 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
1472         else
1473                 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1474
1475         sta = ap_get_sta(hapd, mgmt->da);
1476         if (!sta) {
1477                 printf("handle_assoc_cb: STA " MACSTR " not found\n",
1478                        MAC2STR(mgmt->da));
1479                 return;
1480         }
1481
1482         if (status != WLAN_STATUS_SUCCESS)
1483                 goto fail;
1484
1485         /* Stop previous accounting session, if one is started, and allocate
1486          * new session id for the new session. */
1487         accounting_sta_stop(hapd, sta);
1488
1489         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1490                        HOSTAPD_LEVEL_INFO,
1491                        "associated (aid %d)",
1492                        sta->aid);
1493
1494         if (sta->flags & WLAN_STA_ASSOC)
1495                 new_assoc = 0;
1496         sta->flags |= WLAN_STA_ASSOC;
1497
1498         if (reassoc)
1499                 mlme_reassociate_indication(hapd, sta);
1500         else
1501                 mlme_associate_indication(hapd, sta);
1502
1503 #ifdef CONFIG_IEEE80211N
1504         if (sta->flags & WLAN_STA_HT)
1505                 ht_cap = &sta->ht_capabilities;
1506 #endif /* CONFIG_IEEE80211N */
1507
1508 #ifdef CONFIG_IEEE80211W
1509         sta->ping_timed_out = 0;
1510 #endif /* CONFIG_IEEE80211W */
1511
1512         if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid,
1513                             sta->capability, sta->supported_rates,
1514                             sta->supported_rates_len, 0, sta->listen_interval,
1515                             ht_cap))
1516         {
1517                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1518                                HOSTAPD_LEVEL_NOTICE,
1519                                "Could not add STA to kernel driver");
1520         }
1521
1522         if (sta->eapol_sm == NULL) {
1523                 /*
1524                  * This STA does not use RADIUS server for EAP authentication,
1525                  * so bind it to the selected VLAN interface now, since the
1526                  * interface selection is not going to change anymore.
1527                  */
1528                 ap_sta_bind_vlan(hapd, sta, 0);
1529         } else if (sta->vlan_id) {
1530                 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
1531                 ap_sta_bind_vlan(hapd, sta, 0);
1532         }
1533         if (sta->flags & WLAN_STA_SHORT_PREAMBLE) {
1534                 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
1535                                       WLAN_STA_SHORT_PREAMBLE, ~0);
1536         } else {
1537                 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
1538                                       0, ~WLAN_STA_SHORT_PREAMBLE);
1539         }
1540
1541         if (sta->auth_alg == WLAN_AUTH_FT)
1542                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
1543         else
1544                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
1545         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
1546
1547         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
1548
1549  fail:
1550         /* Copy of the association request is not needed anymore */
1551         if (sta->last_assoc_req) {
1552                 os_free(sta->last_assoc_req);
1553                 sta->last_assoc_req = NULL;
1554         }
1555 }
1556
1557
1558 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
1559                         u16 stype, int ok)
1560 {
1561         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
1562
1563         switch (stype) {
1564         case WLAN_FC_STYPE_AUTH:
1565                 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
1566                 handle_auth_cb(hapd, mgmt, len, ok);
1567                 break;
1568         case WLAN_FC_STYPE_ASSOC_RESP:
1569                 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
1570                 handle_assoc_cb(hapd, mgmt, len, 0, ok);
1571                 break;
1572         case WLAN_FC_STYPE_REASSOC_RESP:
1573                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
1574                 handle_assoc_cb(hapd, mgmt, len, 1, ok);
1575                 break;
1576         case WLAN_FC_STYPE_PROBE_RESP:
1577                 wpa_printf(MSG_DEBUG, "mgmt::proberesp cb");
1578                 break;
1579         case WLAN_FC_STYPE_DEAUTH:
1580                 /* ignore */
1581                 break;
1582         case WLAN_FC_STYPE_ACTION:
1583                 wpa_printf(MSG_DEBUG, "mgmt::action cb");
1584                 break;
1585         default:
1586                 printf("unknown mgmt cb frame subtype %d\n", stype);
1587                 break;
1588         }
1589 }
1590
1591
1592 static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
1593                                                 void *timeout_ctx)
1594 {
1595         struct hostapd_data *hapd = eloop_ctx;
1596         hapd->tkip_countermeasures = 0;
1597         hostapd_set_countermeasures(hapd, 0);
1598         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1599                        HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
1600 }
1601
1602
1603 static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
1604 {
1605         struct sta_info *sta;
1606
1607         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1608                        HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
1609
1610         wpa_auth_countermeasures_start(hapd->wpa_auth);
1611         hapd->tkip_countermeasures = 1;
1612         hostapd_set_countermeasures(hapd, 1);
1613         wpa_gtk_rekey(hapd->wpa_auth);
1614         eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
1615         eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
1616                                hapd, NULL);
1617         for (sta = hapd->sta_list; sta != NULL; sta = sta->next) {
1618                 hostapd_sta_deauth(hapd, sta->addr,
1619                                    WLAN_REASON_MICHAEL_MIC_FAILURE);
1620                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1621                                 WLAN_STA_AUTHORIZED);
1622                 hostapd_sta_remove(hapd, sta->addr);
1623         }
1624 }
1625
1626
1627 void ieee80211_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr,
1628                                    int local)
1629 {
1630         time_t now;
1631
1632         if (addr && local) {
1633                 struct sta_info *sta = ap_get_sta(hapd, addr);
1634                 if (sta != NULL) {
1635                         wpa_auth_sta_local_mic_failure_report(sta->wpa_sm);
1636                         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
1637                                        HOSTAPD_LEVEL_INFO,
1638                                        "Michael MIC failure detected in "
1639                                        "received frame");
1640                         mlme_michaelmicfailure_indication(hapd, addr);
1641                 } else {
1642                         wpa_printf(MSG_DEBUG,
1643                                    "MLME-MICHAELMICFAILURE.indication "
1644                                    "for not associated STA (" MACSTR
1645                                    ") ignored", MAC2STR(addr));
1646                         return;
1647                 }
1648         }
1649
1650         time(&now);
1651         if (now > hapd->michael_mic_failure + 60) {
1652                 hapd->michael_mic_failures = 1;
1653         } else {
1654                 hapd->michael_mic_failures++;
1655                 if (hapd->michael_mic_failures > 1)
1656                         ieee80211_tkip_countermeasures_start(hapd);
1657         }
1658         hapd->michael_mic_failure = now;
1659 }
1660
1661
1662 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1663 {
1664         /* TODO */
1665         return 0;
1666 }
1667
1668
1669 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1670                            char *buf, size_t buflen)
1671 {
1672         /* TODO */
1673         return 0;
1674 }
1675
1676 #endif /* CONFIG_NATIVE_WINDOWS */