contrib/wpa/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, tu;
 302         struct os_time now, passed;
 303
 304         *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
 305         *pos++ = 5;
 306         *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK;
 307         os_get_time(&now);
 308         os_time_sub(&now, &sta->sa_query_start, &passed);
 309         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 310         if (hapd->conf->assoc_sa_query_max_timeout > tu)
 311                 timeout = hapd->conf->assoc_sa_query_max_timeout - tu;
 312         else
 313                 timeout = 0;
 314         if (timeout < hapd->conf->assoc_sa_query_max_timeout)
 315                 timeout++; /* add some extra time for local timers */
 316         WPA_PUT_LE32(pos, timeout);
 317         pos += 4;
 318
 319         return pos;
 320 }
 321 #endif /* CONFIG_IEEE80211W */
 322
 323
 324 void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len)
 325 {
 326         int i;
 327         if (len > HOSTAPD_MAX_SSID_LEN)
 328                 len = HOSTAPD_MAX_SSID_LEN;
 329         for (i = 0; i < len; i++) {
 330                 if (ssid[i] >= 32 && ssid[i] < 127)
 331                         buf[i] = ssid[i];
 332                 else
 333                         buf[i] = '.';
 334         }
 335         buf[len] = '\0';
 336 }
 337
 338
 339 /**
 340  * ieee802_11_send_deauth - Send Deauthentication frame
 341  * @hapd: hostapd BSS data
 342  * @addr: Address of the destination STA
 343  * @reason: Reason code for Deauthentication
 344  */
 345 void ieee802_11_send_deauth(struct hostapd_data *hapd, u8 *addr, u16 reason)
 346 {
 347         struct ieee80211_mgmt mgmt;
 348
 349         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 350                        HOSTAPD_LEVEL_DEBUG,
 351                        "deauthenticate - reason %d", reason);
 352         os_memset(&mgmt, 0, sizeof(mgmt));
 353         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 354                                           WLAN_FC_STYPE_DEAUTH);
 355         os_memcpy(mgmt.da, addr, ETH_ALEN);
 356         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 357         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 358         mgmt.u.deauth.reason_code = host_to_le16(reason);
 359         if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
 360                                     sizeof(mgmt.u.deauth), 0) < 0)
 361                 perror("ieee802_11_send_deauth: send");
 362 }
 363
 364
 365 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
 366                            u16 auth_transaction, u8 *challenge, int iswep)
 367 {
 368         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 369                        HOSTAPD_LEVEL_DEBUG,
 370                        "authentication (shared key, transaction %d)",
 371                        auth_transaction);
 372
 373         if (auth_transaction == 1) {
 374                 if (!sta->challenge) {
 375                         /* Generate a pseudo-random challenge */
 376                         u8 key[8];
 377                         time_t now;
 378                         int r;
 379                         sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
 380                         if (sta->challenge == NULL)
 381                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 382
 383                         now = time(NULL);
 384                         r = random();
 385                         os_memcpy(key, &now, 4);
 386                         os_memcpy(key + 4, &r, 4);
 387                         rc4(sta->challenge, WLAN_AUTH_CHALLENGE_LEN,
 388                             key, sizeof(key));
 389                 }
 390                 return 0;
 391         }
 392
 393         if (auth_transaction != 3)
 394                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 395
 396         /* Transaction 3 */
 397         if (!iswep || !sta->challenge || !challenge ||
 398             os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
 399                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 400                                HOSTAPD_LEVEL_INFO,
 401                                "shared key authentication - invalid "
 402                                "challenge-response");
 403                 return WLAN_STATUS_CHALLENGE_FAIL;
 404         }
 405
 406         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 407                        HOSTAPD_LEVEL_DEBUG,
 408                        "authentication OK (shared key)");
 409 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 410         /* Station will be marked authenticated if it ACKs the
 411          * authentication reply. */
 412 #else
 413         sta->flags |= WLAN_STA_AUTH;
 414         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 415 #endif
 416         os_free(sta->challenge);
 417         sta->challenge = NULL;
 418
 419         return 0;
 420 }
 421
 422
 423 static void send_auth_reply(struct hostapd_data *hapd,
 424                             const u8 *dst, const u8 *bssid,
 425                             u16 auth_alg, u16 auth_transaction, u16 resp,
 426                             const u8 *ies, size_t ies_len)
 427 {
 428         struct ieee80211_mgmt *reply;
 429         u8 *buf;
 430         size_t rlen;
 431
 432         rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
 433         buf = os_zalloc(rlen);
 434         if (buf == NULL)
 435                 return;
 436
 437         reply = (struct ieee80211_mgmt *) buf;
 438         reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 439                                             WLAN_FC_STYPE_AUTH);
 440         os_memcpy(reply->da, dst, ETH_ALEN);
 441         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
 442         os_memcpy(reply->bssid, bssid, ETH_ALEN);
 443
 444         reply->u.auth.auth_alg = host_to_le16(auth_alg);
 445         reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
 446         reply->u.auth.status_code = host_to_le16(resp);
 447
 448         if (ies && ies_len)
 449                 os_memcpy(reply->u.auth.variable, ies, ies_len);
 450
 451         wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
 452                    " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
 453                    MAC2STR(dst), auth_alg, auth_transaction,
 454                    resp, (unsigned long) ies_len);
 455         if (hostapd_send_mgmt_frame(hapd, reply, rlen, 0) < 0)
 456                 perror("send_auth_reply: send");
 457
 458         os_free(buf);
 459 }
 460
 461
 462 #ifdef CONFIG_IEEE80211R
 463 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
 464                                   u16 auth_transaction, u16 status,
 465                                   const u8 *ies, size_t ies_len)
 466 {
 467         struct hostapd_data *hapd = ctx;
 468         struct sta_info *sta;
 469
 470         send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
 471                         status, ies, ies_len);
 472
 473         if (status != WLAN_STATUS_SUCCESS)
 474                 return;
 475
 476         sta = ap_get_sta(hapd, dst);
 477         if (sta == NULL)
 478                 return;
 479
 480         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
 481                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
 482         sta->flags |= WLAN_STA_AUTH;
 483         mlme_authenticate_indication(hapd, sta);
 484 }
 485 #endif /* CONFIG_IEEE80211R */
 486
 487
 488 static void handle_auth(struct hostapd_data *hapd, struct ieee80211_mgmt *mgmt,
 489                         size_t len)
 490 {
 491         u16 auth_alg, auth_transaction, status_code;
 492         u16 resp = WLAN_STATUS_SUCCESS;
 493         struct sta_info *sta = NULL;
 494         int res;
 495         u16 fc;
 496         u8 *challenge = NULL;
 497         u32 session_timeout, acct_interim_interval;
 498         int vlan_id = 0;
 499         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
 500         size_t resp_ies_len = 0;
 501
 502         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
 503                 printf("handle_auth - too short payload (len=%lu)\n",
 504                        (unsigned long) len);
 505                 return;
 506         }
 507
 508         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
 509         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
 510         status_code = le_to_host16(mgmt->u.auth.status_code);
 511         fc = le_to_host16(mgmt->frame_control);
 512
 513         if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
 514             2 + WLAN_AUTH_CHALLENGE_LEN &&
 515             mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
 516             mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
 517                 challenge = &mgmt->u.auth.variable[2];
 518
 519         wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
 520                    "auth_transaction=%d status_code=%d wep=%d%s",
 521                    MAC2STR(mgmt->sa), auth_alg, auth_transaction,
 522                    status_code, !!(fc & WLAN_FC_ISWEP),
 523                    challenge ? " challenge" : "");
 524
 525         if (hapd->tkip_countermeasures) {
 526                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 527                 goto fail;
 528         }
 529
 530         if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
 531                auth_alg == WLAN_AUTH_OPEN) ||
 532 #ifdef CONFIG_IEEE80211R
 533               (hapd->conf->wpa &&
 534                (hapd->conf->wpa_key_mgmt &
 535                 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
 536                auth_alg == WLAN_AUTH_FT) ||
 537 #endif /* CONFIG_IEEE80211R */
 538               ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
 539                auth_alg == WLAN_AUTH_SHARED_KEY))) {
 540                 printf("Unsupported authentication algorithm (%d)\n",
 541                        auth_alg);
 542                 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
 543                 goto fail;
 544         }
 545
 546         if (!(auth_transaction == 1 ||
 547               (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
 548                 printf("Unknown authentication transaction number (%d)\n",
 549                        auth_transaction);
 550                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 551                 goto fail;
 552         }
 553
 554         if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
 555                 printf("Station " MACSTR " not allowed to authenticate.\n",
 556                        MAC2STR(mgmt->sa));
 557                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 558                 goto fail;
 559         }
 560
 561         res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
 562                                       &session_timeout,
 563                                       &acct_interim_interval, &vlan_id);
 564         if (res == HOSTAPD_ACL_REJECT) {
 565                 printf("Station " MACSTR " not allowed to authenticate.\n",
 566                        MAC2STR(mgmt->sa));
 567                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 568                 goto fail;
 569         }
 570         if (res == HOSTAPD_ACL_PENDING) {
 571                 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
 572                            " waiting for an external authentication",
 573                            MAC2STR(mgmt->sa));
 574                 /* Authentication code will re-send the authentication frame
 575                  * after it has received (and cached) information from the
 576                  * external source. */
 577                 return;
 578         }
 579
 580         sta = ap_sta_add(hapd, mgmt->sa);
 581         if (!sta) {
 582                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 583                 goto fail;
 584         }
 585
 586         if (vlan_id > 0) {
 587                 if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 588                                                sta->vlan_id) == NULL) {
 589                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 590                                        HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
 591                                        "%d received from RADIUS server",
 592                                        vlan_id);
 593                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 594                         goto fail;
 595                 }
 596                 sta->vlan_id = vlan_id;
 597                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 598                                HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
 599         }
 600
 601         sta->flags &= ~WLAN_STA_PREAUTH;
 602         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
 603
 604         if (hapd->conf->radius->acct_interim_interval == 0 &&
 605             acct_interim_interval)
 606                 sta->acct_interim_interval = acct_interim_interval;
 607         if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
 608                 ap_sta_session_timeout(hapd, sta, session_timeout);
 609         else
 610                 ap_sta_no_session_timeout(hapd, sta);
 611
 612         switch (auth_alg) {
 613         case WLAN_AUTH_OPEN:
 614                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 615                                HOSTAPD_LEVEL_DEBUG,
 616                                "authentication OK (open system)");
 617 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 618                 /* Station will be marked authenticated if it ACKs the
 619                  * authentication reply. */
 620 #else
 621                 sta->flags |= WLAN_STA_AUTH;
 622                 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 623                 sta->auth_alg = WLAN_AUTH_OPEN;
 624                 mlme_authenticate_indication(hapd, sta);
 625 #endif
 626                 break;
 627         case WLAN_AUTH_SHARED_KEY:
 628                 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
 629                                        fc & WLAN_FC_ISWEP);
 630                 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
 631                 mlme_authenticate_indication(hapd, sta);
 632                 if (sta->challenge && auth_transaction == 1) {
 633                         resp_ies[0] = WLAN_EID_CHALLENGE;
 634                         resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
 635                         os_memcpy(resp_ies + 2, sta->challenge,
 636                                   WLAN_AUTH_CHALLENGE_LEN);
 637                         resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
 638                 }
 639                 break;
 640 #ifdef CONFIG_IEEE80211R
 641         case WLAN_AUTH_FT:
 642                 sta->auth_alg = WLAN_AUTH_FT;
 643                 if (sta->wpa_sm == NULL)
 644                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 645                                                         sta->addr);
 646                 if (sta->wpa_sm == NULL) {
 647                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
 648                                    "state machine");
 649                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 650                         goto fail;
 651                 }
 652                 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
 653                                     auth_transaction, mgmt->u.auth.variable,
 654                                     len - IEEE80211_HDRLEN -
 655                                     sizeof(mgmt->u.auth),
 656                                     handle_auth_ft_finish, hapd);
 657                 /* handle_auth_ft_finish() callback will complete auth. */
 658                 return;
 659 #endif /* CONFIG_IEEE80211R */
 660         }
 661
 662  fail:
 663         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
 664                         auth_transaction + 1, resp, resp_ies, resp_ies_len);
 665 }
 666
 667
 668 static void handle_assoc(struct hostapd_data *hapd,
 669                          struct ieee80211_mgmt *mgmt, size_t len, int reassoc)
 670 {
 671         u16 capab_info, listen_interval;
 672         u16 resp = WLAN_STATUS_SUCCESS;
 673         u8 *pos, *wpa_ie;
 674         size_t wpa_ie_len;
 675         int send_deauth = 0, send_len, left, i;
 676         struct sta_info *sta;
 677         struct ieee802_11_elems elems;
 678         u8 buf[sizeof(struct ieee80211_mgmt) + 512];
 679         struct ieee80211_mgmt *reply;
 680
 681         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
 682                                       sizeof(mgmt->u.assoc_req))) {
 683                 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
 684                        "\n", reassoc, (unsigned long) len);
 685                 return;
 686         }
 687
 688         if (reassoc) {
 689                 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
 690                 listen_interval = le_to_host16(
 691                         mgmt->u.reassoc_req.listen_interval);
 692                 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
 693                            " capab_info=0x%02x listen_interval=%d current_ap="
 694                            MACSTR,
 695                            MAC2STR(mgmt->sa), capab_info, listen_interval,
 696                            MAC2STR(mgmt->u.reassoc_req.current_ap));
 697                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
 698                 pos = mgmt->u.reassoc_req.variable;
 699         } else {
 700                 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
 701                 listen_interval = le_to_host16(
 702                         mgmt->u.assoc_req.listen_interval);
 703                 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
 704                            " capab_info=0x%02x listen_interval=%d",
 705                            MAC2STR(mgmt->sa), capab_info, listen_interval);
 706                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
 707                 pos = mgmt->u.assoc_req.variable;
 708         }
 709
 710         sta = ap_get_sta(hapd, mgmt->sa);
 711 #ifdef CONFIG_IEEE80211R
 712         if (sta && sta->auth_alg == WLAN_AUTH_FT &&
 713             (sta->flags & WLAN_STA_AUTH) == 0) {
 714                 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
 715                            "prior to authentication since it is using "
 716                            "over-the-DS FT", MAC2STR(mgmt->sa));
 717         } else
 718 #endif /* CONFIG_IEEE80211R */
 719         if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
 720                 printf("STA " MACSTR " trying to associate before "
 721                        "authentication\n", MAC2STR(mgmt->sa));
 722                 if (sta) {
 723                         printf("  sta: addr=" MACSTR " aid=%d flags=0x%04x\n",
 724                                MAC2STR(sta->addr), sta->aid, sta->flags);
 725                 }
 726                 send_deauth = 1;
 727                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 728                 goto fail;
 729         }
 730
 731         if (hapd->tkip_countermeasures) {
 732                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 733                 goto fail;
 734         }
 735
 736         if (listen_interval > hapd->conf->max_listen_interval) {
 737                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 738                                HOSTAPD_LEVEL_DEBUG,
 739                                "Too large Listen Interval (%d)",
 740                                listen_interval);
 741                 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
 742                 goto fail;
 743         }
 744
 745         sta->capability = capab_info;
 746         sta->listen_interval = listen_interval;
 747
 748         /* followed by SSID and Supported rates; and HT capabilities if 802.11n
 749          * is used */
 750         if (ieee802_11_parse_elems(pos, left, &elems, 1) == ParseFailed ||
 751             !elems.ssid) {
 752                 printf("STA " MACSTR " sent invalid association request\n",
 753                        MAC2STR(sta->addr));
 754                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 755                 goto fail;
 756         }
 757
 758         if (elems.ssid_len != hapd->conf->ssid.ssid_len ||
 759             os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) != 0)
 760         {
 761                 char ssid_txt[33];
 762                 ieee802_11_print_ssid(ssid_txt, elems.ssid, elems.ssid_len);
 763                 printf("Station " MACSTR " tried to associate with "
 764                        "unknown SSID '%s'\n", MAC2STR(sta->addr), ssid_txt);
 765                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 766                 goto fail;
 767         }
 768
 769         sta->flags &= ~WLAN_STA_WME;
 770         if (elems.wme && hapd->conf->wme_enabled) {
 771                 if (hostapd_eid_wme_valid(hapd, elems.wme, elems.wme_len))
 772                         hostapd_logger(hapd, sta->addr,
 773                                        HOSTAPD_MODULE_WPA,
 774                                        HOSTAPD_LEVEL_DEBUG,
 775                                        "invalid WME element in association "
 776                                        "request");
 777                 else
 778                         sta->flags |= WLAN_STA_WME;
 779         }
 780
 781         if (!elems.supp_rates) {
 782                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 783                                HOSTAPD_LEVEL_DEBUG,
 784                                "No supported rates element in AssocReq");
 785                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 786                 goto fail;
 787         }
 788
 789         if (elems.supp_rates_len > sizeof(sta->supported_rates)) {
 790                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 791                                HOSTAPD_LEVEL_DEBUG,
 792                                "Invalid supported rates element length %d",
 793                                elems.supp_rates_len);
 794                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 795                 goto fail;
 796         }
 797
 798         os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
 799         os_memcpy(sta->supported_rates, elems.supp_rates,
 800                   elems.supp_rates_len);
 801         sta->supported_rates_len = elems.supp_rates_len;
 802
 803         if (elems.ext_supp_rates) {
 804                 if (elems.supp_rates_len + elems.ext_supp_rates_len >
 805                     sizeof(sta->supported_rates)) {
 806                         hostapd_logger(hapd, mgmt->sa,
 807                                        HOSTAPD_MODULE_IEEE80211,
 808                                        HOSTAPD_LEVEL_DEBUG,
 809                                        "Invalid supported rates element length"
 810                                        " %d+%d", elems.supp_rates_len,
 811                                        elems.ext_supp_rates_len);
 812                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 813                         goto fail;
 814                 }
 815
 816                 os_memcpy(sta->supported_rates + elems.supp_rates_len,
 817                           elems.ext_supp_rates, elems.ext_supp_rates_len);
 818                 sta->supported_rates_len += elems.ext_supp_rates_len;
 819         }
 820
 821 #ifdef CONFIG_IEEE80211N
 822         /* save HT capabilities in the sta object */
 823         os_memset(&sta->ht_capabilities, 0, sizeof(sta->ht_capabilities));
 824         if (elems.ht_capabilities &&
 825             elems.ht_capabilities_len >=
 826             sizeof(struct ieee80211_ht_capability)) {
 827                 sta->flags |= WLAN_STA_HT;
 828                 sta->ht_capabilities.id = WLAN_EID_HT_CAP;
 829                 sta->ht_capabilities.length =
 830                         sizeof(struct ieee80211_ht_capability);
 831                 os_memcpy(&sta->ht_capabilities.data,
 832                           elems.ht_capabilities,
 833                           sizeof(struct ieee80211_ht_capability));
 834         } else
 835                 sta->flags &= ~WLAN_STA_HT;
 836 #endif /* CONFIG_IEEE80211N */
 837
 838         if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
 839                 wpa_ie = elems.rsn_ie;
 840                 wpa_ie_len = elems.rsn_ie_len;
 841         } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
 842                    elems.wpa_ie) {
 843                 wpa_ie = elems.wpa_ie;
 844                 wpa_ie_len = elems.wpa_ie_len;
 845         } else {
 846                 wpa_ie = NULL;
 847                 wpa_ie_len = 0;
 848         }
 849 #ifdef CONFIG_WPS
 850         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
 851         if (hapd->conf->wps_state && wpa_ie == NULL) {
 852                 if (elems.wps_ie) {
 853                         wpa_printf(MSG_DEBUG, "STA included WPS IE in "
 854                                    "(Re)Association Request - assume WPS is "
 855                                    "used");
 856                         sta->flags |= WLAN_STA_WPS;
 857                         wpabuf_free(sta->wps_ie);
 858                         sta->wps_ie = wpabuf_alloc_copy(elems.wps_ie + 4,
 859                                                         elems.wps_ie_len - 4);
 860                 } else {
 861                         wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE "
 862                                    "in (Re)Association Request - possible WPS "
 863                                    "use");
 864                         sta->flags |= WLAN_STA_MAYBE_WPS;
 865                 }
 866         } else
 867 #endif /* CONFIG_WPS */
 868         if (hapd->conf->wpa && wpa_ie == NULL) {
 869                 printf("STA " MACSTR ": No WPA/RSN IE in association "
 870                        "request\n", MAC2STR(sta->addr));
 871                 resp = WLAN_STATUS_INVALID_IE;
 872                 goto fail;
 873         }
 874
 875         if (hapd->conf->wpa && wpa_ie) {
 876                 int res;
 877                 wpa_ie -= 2;
 878                 wpa_ie_len += 2;
 879                 if (sta->wpa_sm == NULL)
 880                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 881                                                         sta->addr);
 882                 if (sta->wpa_sm == NULL) {
 883                         printf("Failed to initialize WPA state machine\n");
 884                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 885                         goto fail;
 886                 }
 887                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 888                                           wpa_ie, wpa_ie_len,
 889                                           elems.mdie, elems.mdie_len);
 890                 if (res == WPA_INVALID_GROUP)
 891                         resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
 892                 else if (res == WPA_INVALID_PAIRWISE)
 893                         resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
 894                 else if (res == WPA_INVALID_AKMP)
 895                         resp = WLAN_STATUS_AKMP_NOT_VALID;
 896                 else if (res == WPA_ALLOC_FAIL)
 897                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 898 #ifdef CONFIG_IEEE80211W
 899                 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
 900                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
 901                 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
 902                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
 903 #endif /* CONFIG_IEEE80211W */
 904                 else if (res == WPA_INVALID_MDIE)
 905                         resp = WLAN_STATUS_INVALID_MDIE;
 906                 else if (res != WPA_IE_OK)
 907                         resp = WLAN_STATUS_INVALID_IE;
 908                 if (resp != WLAN_STATUS_SUCCESS)
 909                         goto fail;
 910 #ifdef CONFIG_IEEE80211W
 911                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
 912                     sta->sa_query_count > 0)
 913                         ap_check_sa_query_timeout(hapd, sta);
 914                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
 915                     (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
 916                         /*
 917                          * STA has already been associated with MFP and SA
 918                          * Query timeout has not been reached. Reject the
 919                          * association attempt temporarily and start SA Query,
 920                          * if one is not pending.
 921                          */
 922
 923                         if (sta->sa_query_count == 0)
 924                                 ap_sta_start_sa_query(hapd, sta);
 925
 926                         resp = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
 927                         goto fail;
 928                 }
 929
 930                 if (wpa_auth_uses_mfp(sta->wpa_sm))
 931                         sta->flags |= WLAN_STA_MFP;
 932                 else
 933                         sta->flags &= ~WLAN_STA_MFP;
 934 #endif /* CONFIG_IEEE80211W */
 935
 936 #ifdef CONFIG_IEEE80211R
 937                 if (sta->auth_alg == WLAN_AUTH_FT) {
 938                         if (!reassoc) {
 939                                 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
 940                                            "to use association (not "
 941                                            "re-association) with FT auth_alg",
 942                                            MAC2STR(sta->addr));
 943                                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 944                                 goto fail;
 945                         }
 946
 947                         resp = wpa_ft_validate_reassoc(sta->wpa_sm, pos, left);
 948                         if (resp != WLAN_STATUS_SUCCESS)
 949                                 goto fail;
 950                 }
 951 #endif /* CONFIG_IEEE80211R */
 952 #ifdef CONFIG_IEEE80211N
 953                 if ((sta->flags & WLAN_STA_HT) &&
 954                     wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
 955                         wpa_printf(MSG_DEBUG, "HT: " MACSTR " tried to "
 956                                    "use TKIP with HT association",
 957                                    MAC2STR(sta->addr));
 958                         resp = WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
 959                         goto fail;
 960                 }
 961 #endif /* CONFIG_IEEE80211N */
 962         } else
 963                 wpa_auth_sta_no_wpa(sta->wpa_sm);
 964
 965         if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 966                 sta->flags |= WLAN_STA_NONERP;
 967         for (i = 0; i < sta->supported_rates_len; i++) {
 968                 if ((sta->supported_rates[i] & 0x7f) > 22) {
 969                         sta->flags &= ~WLAN_STA_NONERP;
 970                         break;
 971                 }
 972         }
 973         if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
 974                 sta->nonerp_set = 1;
 975                 hapd->iface->num_sta_non_erp++;
 976                 if (hapd->iface->num_sta_non_erp == 1)
 977                         ieee802_11_set_beacons(hapd->iface);
 978         }
 979
 980         if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
 981             !sta->no_short_slot_time_set) {
 982                 sta->no_short_slot_time_set = 1;
 983                 hapd->iface->num_sta_no_short_slot_time++;
 984                 if (hapd->iface->current_mode->mode ==
 985                     HOSTAPD_MODE_IEEE80211G &&
 986                     hapd->iface->num_sta_no_short_slot_time == 1)
 987                         ieee802_11_set_beacons(hapd->iface);
 988         }
 989
 990         if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
 991                 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 992         else
 993                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 994
 995         if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
 996             !sta->no_short_preamble_set) {
 997                 sta->no_short_preamble_set = 1;
 998                 hapd->iface->num_sta_no_short_preamble++;
 999                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
1000                     && hapd->iface->num_sta_no_short_preamble == 1)
1001                         ieee802_11_set_beacons(hapd->iface);
1002         }
1003
1004 #ifdef CONFIG_IEEE80211N
1005         if (sta->flags & WLAN_STA_HT) {
1006                 u16 ht_capab = le_to_host16(
1007                         sta->ht_capabilities.data.capabilities_info);
1008                 wpa_printf(MSG_DEBUG, "HT: STA " MACSTR " HT Capabilities "
1009                            "Info: 0x%04x", MAC2STR(sta->addr), ht_capab);
1010                 if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0) {
1011                         if (!sta->no_ht_gf_set) {
1012                                 sta->no_ht_gf_set = 1;
1013                                 hapd->iface->num_sta_ht_no_gf++;
1014                         }
1015                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no "
1016                                    "greenfield, num of non-gf stations %d",
1017                                    __func__, MAC2STR(sta->addr),
1018                                    hapd->iface->num_sta_ht_no_gf);
1019                 }
1020                 if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0) {
1021                         if (!sta->ht_20mhz_set) {
1022                                 sta->ht_20mhz_set = 1;
1023                                 hapd->iface->num_sta_ht_20mhz++;
1024                         }
1025                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - 20 MHz HT, "
1026                                    "num of 20MHz HT STAs %d",
1027                                    __func__, MAC2STR(sta->addr),
1028                                    hapd->iface->num_sta_ht_20mhz);
1029                 }
1030         } else {
1031                 if (!sta->no_ht_set) {
1032                         sta->no_ht_set = 1;
1033                         hapd->iface->num_sta_no_ht++;
1034                 }
1035                 if (hapd->iconf->ieee80211n) {
1036                         wpa_printf(MSG_DEBUG, "%s STA " MACSTR
1037                                    " - no HT, num of non-HT stations %d",
1038                                    __func__, MAC2STR(sta->addr),
1039                                    hapd->iface->num_sta_no_ht);
1040                 }
1041         }
1042
1043         if (hostapd_ht_operation_update(hapd->iface) > 0)
1044                 ieee802_11_set_beacons(hapd->iface);
1045 #endif /* CONFIG_IEEE80211N */
1046
1047         /* get a unique AID */
1048         if (sta->aid > 0) {
1049                 wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
1050         } else {
1051                 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1052                         if (hapd->sta_aid[sta->aid - 1] == NULL)
1053                                 break;
1054                 if (sta->aid > MAX_AID_TABLE_SIZE) {
1055                         sta->aid = 0;
1056                         resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1057                         wpa_printf(MSG_ERROR, "  no room for more AIDs");
1058                         goto fail;
1059                 } else {
1060                         hapd->sta_aid[sta->aid - 1] = sta;
1061                         wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
1062                 }
1063         }
1064
1065         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1066                        HOSTAPD_LEVEL_DEBUG,
1067                        "association OK (aid %d)", sta->aid);
1068         /* Station will be marked associated, after it acknowledges AssocResp
1069          */
1070
1071 #ifdef CONFIG_IEEE80211W
1072         if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
1073                 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
1074                            "SA Query procedure", reassoc ? "re" : "");
1075                 /* TODO: Send a protected Disassociate frame to the STA using
1076                  * the old key and Reason Code "Previous Authentication no
1077                  * longer valid". Make sure this is only sent protected since
1078                  * unprotected frame would be received by the STA that is now
1079                  * trying to associate.
1080                  */
1081         }
1082 #endif /* CONFIG_IEEE80211W */
1083
1084         if (reassoc) {
1085                 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap,
1086                           ETH_ALEN);
1087         }
1088
1089         if (sta->last_assoc_req)
1090                 os_free(sta->last_assoc_req);
1091         sta->last_assoc_req = os_malloc(len);
1092         if (sta->last_assoc_req)
1093                 os_memcpy(sta->last_assoc_req, mgmt, len);
1094
1095         /* Make sure that the previously registered inactivity timer will not
1096          * remove the STA immediately. */
1097         sta->timeout_next = STA_NULLFUNC;
1098
1099  fail:
1100         os_memset(buf, 0, sizeof(buf));
1101         reply = (struct ieee80211_mgmt *) buf;
1102         reply->frame_control =
1103                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1104                              (send_deauth ? WLAN_FC_STYPE_DEAUTH :
1105                               (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1106                                WLAN_FC_STYPE_ASSOC_RESP)));
1107         os_memcpy(reply->da, mgmt->sa, ETH_ALEN);
1108         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
1109         os_memcpy(reply->bssid, mgmt->bssid, ETH_ALEN);
1110
1111         send_len = IEEE80211_HDRLEN;
1112         if (send_deauth) {
1113                 send_len += sizeof(reply->u.deauth);
1114                 reply->u.deauth.reason_code = host_to_le16(resp);
1115         } else {
1116                 u8 *p;
1117                 send_len += sizeof(reply->u.assoc_resp);
1118                 reply->u.assoc_resp.capab_info =
1119                         host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
1120                 reply->u.assoc_resp.status_code = host_to_le16(resp);
1121                 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
1122                                                        | BIT(14) | BIT(15));
1123                 /* Supported rates */
1124                 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
1125                 /* Extended supported rates */
1126                 p = hostapd_eid_ext_supp_rates(hapd, p);
1127                 if (sta->flags & WLAN_STA_WME)
1128                         p = hostapd_eid_wme(hapd, p);
1129
1130                 p = hostapd_eid_ht_capabilities_info(hapd, p);
1131                 p = hostapd_eid_ht_operation(hapd, p);
1132
1133 #ifdef CONFIG_IEEE80211R
1134                 if (resp == WLAN_STATUS_SUCCESS) {
1135                         /* IEEE 802.11r: Mobility Domain Information, Fast BSS
1136                          * Transition Information, RSN */
1137                         p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
1138                                                         buf + sizeof(buf) - p,
1139                                                         sta->auth_alg);
1140                 }
1141 #endif /* CONFIG_IEEE80211R */
1142
1143 #ifdef CONFIG_IEEE80211W
1144                 if (resp == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
1145                         p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
1146 #endif /* CONFIG_IEEE80211W */
1147
1148                 send_len += p - reply->u.assoc_resp.variable;
1149         }
1150
1151         if (hostapd_send_mgmt_frame(hapd, reply, send_len, 0) < 0)
1152                 perror("handle_assoc: send");
1153 }
1154
1155
1156 static void handle_disassoc(struct hostapd_data *hapd,
1157                             struct ieee80211_mgmt *mgmt, size_t len)
1158 {
1159         struct sta_info *sta;
1160
1161         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1162                 printf("handle_disassoc - too short payload (len=%lu)\n",
1163                        (unsigned long) len);
1164                 return;
1165         }
1166
1167         wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1168                    MAC2STR(mgmt->sa),
1169                    le_to_host16(mgmt->u.disassoc.reason_code));
1170
1171         sta = ap_get_sta(hapd, mgmt->sa);
1172         if (sta == NULL) {
1173                 printf("Station " MACSTR " trying to disassociate, but it "
1174                        "is not associated.\n", MAC2STR(mgmt->sa));
1175                 return;
1176         }
1177
1178         sta->flags &= ~WLAN_STA_ASSOC;
1179         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1180         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1181                        HOSTAPD_LEVEL_INFO, "disassociated");
1182         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1183         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1184         /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1185          * authenticated. */
1186         accounting_sta_stop(hapd, sta);
1187         ieee802_1x_free_station(sta);
1188         hostapd_sta_remove(hapd, sta->addr);
1189
1190         if (sta->timeout_next == STA_NULLFUNC ||
1191             sta->timeout_next == STA_DISASSOC) {
1192                 sta->timeout_next = STA_DEAUTH;
1193                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1194                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1195                                        hapd, sta);
1196         }
1197
1198         mlme_disassociate_indication(
1199                 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1200 }
1201
1202
1203 static void handle_deauth(struct hostapd_data *hapd,
1204                           struct ieee80211_mgmt *mgmt, size_t len)
1205 {
1206         struct sta_info *sta;
1207
1208         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1209                 printf("handle_deauth - too short payload (len=%lu)\n",
1210                        (unsigned long) len);
1211                 return;
1212         }
1213
1214         wpa_printf(MSG_DEBUG, "deauthentication: STA=" MACSTR
1215                    " reason_code=%d",
1216                    MAC2STR(mgmt->sa),
1217                    le_to_host16(mgmt->u.deauth.reason_code));
1218
1219         sta = ap_get_sta(hapd, mgmt->sa);
1220         if (sta == NULL) {
1221                 printf("Station " MACSTR " trying to deauthenticate, but it "
1222                        "is not authenticated.\n", MAC2STR(mgmt->sa));
1223                 return;
1224         }
1225
1226         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1227         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1228         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1229                        HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1230         mlme_deauthenticate_indication(
1231                 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1232         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1233         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1234         ap_free_sta(hapd, sta);
1235 }
1236
1237
1238 static void handle_beacon(struct hostapd_data *hapd,
1239                           struct ieee80211_mgmt *mgmt, size_t len,
1240                           struct hostapd_frame_info *fi)
1241 {
1242         struct ieee802_11_elems elems;
1243
1244         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1245                 printf("handle_beacon - too short payload (len=%lu)\n",
1246                        (unsigned long) len);
1247                 return;
1248         }
1249
1250         (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1251                                       len - (IEEE80211_HDRLEN +
1252                                              sizeof(mgmt->u.beacon)), &elems,
1253                                       0);
1254
1255         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1256 }
1257
1258
1259 #ifdef CONFIG_IEEE80211W
1260
1261 /* MLME-SAQuery.request */
1262 void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
1263                                   const u8 *addr, const u8 *trans_id)
1264 {
1265         struct ieee80211_mgmt mgmt;
1266         u8 *end;
1267
1268         os_memset(&mgmt, 0, sizeof(mgmt));
1269         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1270                                           WLAN_FC_STYPE_ACTION);
1271         os_memcpy(mgmt.da, addr, ETH_ALEN);
1272         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
1273         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
1274         mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
1275         mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
1276         os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
1277                   WLAN_SA_QUERY_TR_ID_LEN);
1278         end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
1279         if (hostapd_send_mgmt_frame(hapd, &mgmt, end - (u8 *) &mgmt, 0) < 0)
1280                 perror("ieee802_11_send_sa_query_req: send");
1281 }
1282
1283
1284 static void hostapd_sa_query_action(struct hostapd_data *hapd,
1285                                     struct ieee80211_mgmt *mgmt, size_t len)
1286 {
1287         struct sta_info *sta;
1288         u8 *end;
1289         int i;
1290
1291         end = mgmt->u.action.u.sa_query_resp.trans_id +
1292                 WLAN_SA_QUERY_TR_ID_LEN;
1293         if (((u8 *) mgmt) + len < end) {
1294                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
1295                            "frame (len=%lu)", (unsigned long) len);
1296                 return;
1297         }
1298
1299         if (mgmt->u.action.u.sa_query_resp.action != WLAN_SA_QUERY_RESPONSE) {
1300                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query "
1301                            "Action %d", mgmt->u.action.u.sa_query_resp.action);
1302                 return;
1303         }
1304
1305         /* MLME-SAQuery.confirm */
1306
1307         sta = ap_get_sta(hapd, mgmt->sa);
1308         if (sta == NULL || sta->sa_query_trans_id == NULL) {
1309                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
1310                            "pending SA Query request found");
1311                 return;
1312         }
1313
1314         for (i = 0; i < sta->sa_query_count; i++) {
1315                 if (os_memcmp(sta->sa_query_trans_id +
1316                               i * WLAN_SA_QUERY_TR_ID_LEN,
1317                               mgmt->u.action.u.sa_query_resp.trans_id,
1318                               WLAN_SA_QUERY_TR_ID_LEN) == 0)
1319                         break;
1320         }
1321
1322         if (i >= sta->sa_query_count) {
1323                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query "
1324                            "transaction identifier found");
1325                 return;
1326         }
1327
1328         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1329                        HOSTAPD_LEVEL_DEBUG,
1330                        "Reply to pending SA Query received");
1331         ap_sta_stop_sa_query(hapd, sta);
1332 }
1333 #endif /* CONFIG_IEEE80211W */
1334
1335
1336 static void handle_action(struct hostapd_data *hapd,
1337                           struct ieee80211_mgmt *mgmt, size_t len)
1338 {
1339         if (len < IEEE80211_HDRLEN + 1) {
1340                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1341                                HOSTAPD_LEVEL_DEBUG,
1342                                "handle_action - too short payload (len=%lu)",
1343                                (unsigned long) len);
1344                 return;
1345         }
1346
1347         switch (mgmt->u.action.category) {
1348 #ifdef CONFIG_IEEE80211R
1349         case WLAN_ACTION_FT:
1350         {
1351                 struct sta_info *sta;
1352
1353                 sta = ap_get_sta(hapd, mgmt->sa);
1354                 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
1355                         wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action "
1356                                    "frame from unassociated STA " MACSTR,
1357                                    MAC2STR(mgmt->sa));
1358                         return;
1359                 }
1360
1361                 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
1362                                      len - IEEE80211_HDRLEN))
1363                         break;
1364
1365                 return;
1366         }
1367 #endif /* CONFIG_IEEE80211R */
1368         case WLAN_ACTION_WMM:
1369                 hostapd_wme_action(hapd, mgmt, len);
1370                 return;
1371 #ifdef CONFIG_IEEE80211W
1372         case WLAN_ACTION_SA_QUERY:
1373                 hostapd_sa_query_action(hapd, mgmt, len);
1374                 return;
1375 #endif /* CONFIG_IEEE80211W */
1376         }
1377
1378         hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1379                        HOSTAPD_LEVEL_DEBUG,
1380                        "handle_action - unknown action category %d or invalid "
1381                        "frame",
1382                        mgmt->u.action.category);
1383         if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
1384             !(mgmt->sa[0] & 0x01)) {
1385                 /*
1386                  * IEEE 802.11-REVma/D9.0 - 7.3.1.11
1387                  * Return the Action frame to the source without change
1388                  * except that MSB of the Category set to 1.
1389                  */
1390                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
1391                            "frame back to sender");
1392                 os_memcpy(mgmt->da, mgmt->sa, ETH_ALEN);
1393                 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
1394                 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
1395                 mgmt->u.action.category |= 0x80;
1396
1397                 hostapd_send_mgmt_frame(hapd, mgmt, len, 0);
1398         }
1399 }
1400
1401
1402 /**
1403  * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
1404  * @hapd: hostapd BSS data structure (the BSS to which the management frame was
1405  * sent to)
1406  * @buf: management frame data (starting from IEEE 802.11 header)
1407  * @len: length of frame data in octets
1408  * @stype: management frame subtype from frame control field
1409  * @fi: meta data about received frame (signal level, etc.)
1410  *
1411  * Process all incoming IEEE 802.11 management frames. This will be called for
1412  * each frame received from the kernel driver through wlan#ap interface. In
1413  * addition, it can be called to re-inserted pending frames (e.g., when using
1414  * external RADIUS server as an MAC ACL).
1415  */
1416 void ieee802_11_mgmt(struct hostapd_data *hapd, u8 *buf, size_t len, u16 stype,
1417                      struct hostapd_frame_info *fi)
1418 {
1419         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
1420         int broadcast;
1421
1422         if (stype == WLAN_FC_STYPE_BEACON) {
1423                 handle_beacon(hapd, mgmt, len, fi);
1424                 return;
1425         }
1426
1427         if (fi && fi->passive_scan)
1428                 return;
1429
1430         broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
1431                 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
1432                 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
1433
1434         if (!broadcast &&
1435             os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
1436                 printf("MGMT: BSSID=" MACSTR " not our address\n",
1437                        MAC2STR(mgmt->bssid));
1438                 return;
1439         }
1440
1441
1442         if (stype == WLAN_FC_STYPE_PROBE_REQ) {
1443                 handle_probe_req(hapd, mgmt, len);
1444                 return;
1445         }
1446
1447         if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
1448                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1449                                HOSTAPD_LEVEL_DEBUG,
1450                                "MGMT: DA=" MACSTR " not our address",
1451                                MAC2STR(mgmt->da));
1452                 return;
1453         }
1454
1455         switch (stype) {
1456         case WLAN_FC_STYPE_AUTH:
1457                 wpa_printf(MSG_DEBUG, "mgmt::auth");
1458                 handle_auth(hapd, mgmt, len);
1459                 break;
1460         case WLAN_FC_STYPE_ASSOC_REQ:
1461                 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
1462                 handle_assoc(hapd, mgmt, len, 0);
1463                 break;
1464         case WLAN_FC_STYPE_REASSOC_REQ:
1465                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
1466                 handle_assoc(hapd, mgmt, len, 1);
1467                 break;
1468         case WLAN_FC_STYPE_DISASSOC:
1469                 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
1470                 handle_disassoc(hapd, mgmt, len);
1471                 break;
1472         case WLAN_FC_STYPE_DEAUTH:
1473                 wpa_printf(MSG_DEBUG, "mgmt::deauth");
1474                 handle_deauth(hapd, mgmt, len);
1475                 break;
1476         case WLAN_FC_STYPE_ACTION:
1477                 wpa_printf(MSG_DEBUG, "mgmt::action");
1478                 handle_action(hapd, mgmt, len);
1479                 break;
1480         default:
1481                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1482                                HOSTAPD_LEVEL_DEBUG,
1483                                "unknown mgmt frame subtype %d", stype);
1484                 break;
1485         }
1486 }
1487
1488
1489 static void handle_auth_cb(struct hostapd_data *hapd,
1490                            struct ieee80211_mgmt *mgmt,
1491                            size_t len, int ok)
1492 {
1493         u16 auth_alg, auth_transaction, status_code;
1494         struct sta_info *sta;
1495
1496         if (!ok) {
1497                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1498                                HOSTAPD_LEVEL_NOTICE,
1499                                "did not acknowledge authentication response");
1500                 return;
1501         }
1502
1503         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
1504                 printf("handle_auth_cb - too short payload (len=%lu)\n",
1505                        (unsigned long) len);
1506                 return;
1507         }
1508
1509         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1510         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
1511         status_code = le_to_host16(mgmt->u.auth.status_code);
1512
1513         sta = ap_get_sta(hapd, mgmt->da);
1514         if (!sta) {
1515                 printf("handle_auth_cb: STA " MACSTR " not found\n",
1516                        MAC2STR(mgmt->da));
1517                 return;
1518         }
1519
1520         if (status_code == WLAN_STATUS_SUCCESS &&
1521             ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
1522              (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
1523                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1524                                HOSTAPD_LEVEL_INFO, "authenticated");
1525                 sta->flags |= WLAN_STA_AUTH;
1526         }
1527 }
1528
1529
1530 static void handle_assoc_cb(struct hostapd_data *hapd,
1531                             struct ieee80211_mgmt *mgmt,
1532                             size_t len, int reassoc, int ok)
1533 {
1534         u16 status;
1535         struct sta_info *sta;
1536         int new_assoc = 1;
1537         struct ht_cap_ie *ht_cap = NULL;
1538
1539         if (!ok) {
1540                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1541                                HOSTAPD_LEVEL_DEBUG,
1542                                "did not acknowledge association response");
1543                 return;
1544         }
1545
1546         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
1547                                       sizeof(mgmt->u.assoc_resp))) {
1548                 printf("handle_assoc_cb(reassoc=%d) - too short payload "
1549                        "(len=%lu)\n", reassoc, (unsigned long) len);
1550                 return;
1551         }
1552
1553         if (reassoc)
1554                 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
1555         else
1556                 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1557
1558         sta = ap_get_sta(hapd, mgmt->da);
1559         if (!sta) {
1560                 printf("handle_assoc_cb: STA " MACSTR " not found\n",
1561                        MAC2STR(mgmt->da));
1562                 return;
1563         }
1564
1565         if (status != WLAN_STATUS_SUCCESS)
1566                 goto fail;
1567
1568         /* Stop previous accounting session, if one is started, and allocate
1569          * new session id for the new session. */
1570         accounting_sta_stop(hapd, sta);
1571
1572         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1573                        HOSTAPD_LEVEL_INFO,
1574                        "associated (aid %d)",
1575                        sta->aid);
1576
1577         if (sta->flags & WLAN_STA_ASSOC)
1578                 new_assoc = 0;
1579         sta->flags |= WLAN_STA_ASSOC;
1580
1581         if (reassoc)
1582                 mlme_reassociate_indication(hapd, sta);
1583         else
1584                 mlme_associate_indication(hapd, sta);
1585
1586 #ifdef CONFIG_IEEE80211N
1587         if (sta->flags & WLAN_STA_HT)
1588                 ht_cap = &sta->ht_capabilities;
1589 #endif /* CONFIG_IEEE80211N */
1590
1591 #ifdef CONFIG_IEEE80211W
1592         sta->sa_query_timed_out = 0;
1593 #endif /* CONFIG_IEEE80211W */
1594
1595         if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid,
1596                             sta->capability, sta->supported_rates,
1597                             sta->supported_rates_len, 0, sta->listen_interval,
1598                             ht_cap))
1599         {
1600                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1601                                HOSTAPD_LEVEL_NOTICE,
1602                                "Could not add STA to kernel driver");
1603         }
1604
1605         if (sta->eapol_sm == NULL) {
1606                 /*
1607                  * This STA does not use RADIUS server for EAP authentication,
1608                  * so bind it to the selected VLAN interface now, since the
1609                  * interface selection is not going to change anymore.
1610                  */
1611                 ap_sta_bind_vlan(hapd, sta, 0);
1612         } else if (sta->vlan_id) {
1613                 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
1614                 ap_sta_bind_vlan(hapd, sta, 0);
1615         }
1616         if (sta->flags & WLAN_STA_SHORT_PREAMBLE) {
1617                 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
1618                                       WLAN_STA_SHORT_PREAMBLE, ~0);
1619         } else {
1620                 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
1621                                       0, ~WLAN_STA_SHORT_PREAMBLE);
1622         }
1623
1624         if (sta->auth_alg == WLAN_AUTH_FT)
1625                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
1626         else
1627                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
1628         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
1629
1630         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
1631
1632  fail:
1633         /* Copy of the association request is not needed anymore */
1634         if (sta->last_assoc_req) {
1635                 os_free(sta->last_assoc_req);
1636                 sta->last_assoc_req = NULL;
1637         }
1638 }
1639
1640
1641 /**
1642  * ieee802_11_mgmt_cb - Process management frame TX status callback
1643  * @hapd: hostapd BSS data structure (the BSS from which the management frame
1644  * was sent from)
1645  * @buf: management frame data (starting from IEEE 802.11 header)
1646  * @len: length of frame data in octets
1647  * @stype: management frame subtype from frame control field
1648  * @ok: Whether the frame was ACK'ed
1649  */
1650 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
1651                         u16 stype, int ok)
1652 {
1653         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
1654
1655         switch (stype) {
1656         case WLAN_FC_STYPE_AUTH:
1657                 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
1658                 handle_auth_cb(hapd, mgmt, len, ok);
1659                 break;
1660         case WLAN_FC_STYPE_ASSOC_RESP:
1661                 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
1662                 handle_assoc_cb(hapd, mgmt, len, 0, ok);
1663                 break;
1664         case WLAN_FC_STYPE_REASSOC_RESP:
1665                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
1666                 handle_assoc_cb(hapd, mgmt, len, 1, ok);
1667                 break;
1668         case WLAN_FC_STYPE_PROBE_RESP:
1669                 wpa_printf(MSG_DEBUG, "mgmt::proberesp cb");
1670                 break;
1671         case WLAN_FC_STYPE_DEAUTH:
1672                 /* ignore */
1673                 break;
1674         case WLAN_FC_STYPE_ACTION:
1675                 wpa_printf(MSG_DEBUG, "mgmt::action cb");
1676                 break;
1677         default:
1678                 printf("unknown mgmt cb frame subtype %d\n", stype);
1679                 break;
1680         }
1681 }
1682
1683
1684 static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
1685                                                 void *timeout_ctx)
1686 {
1687         struct hostapd_data *hapd = eloop_ctx;
1688         hapd->tkip_countermeasures = 0;
1689         hostapd_set_countermeasures(hapd, 0);
1690         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1691                        HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
1692 }
1693
1694
1695 static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
1696 {
1697         struct sta_info *sta;
1698
1699         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1700                        HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
1701
1702         wpa_auth_countermeasures_start(hapd->wpa_auth);
1703         hapd->tkip_countermeasures = 1;
1704         hostapd_set_countermeasures(hapd, 1);
1705         wpa_gtk_rekey(hapd->wpa_auth);
1706         eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
1707         eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
1708                                hapd, NULL);
1709         for (sta = hapd->sta_list; sta != NULL; sta = sta->next) {
1710                 hostapd_sta_deauth(hapd, sta->addr,
1711                                    WLAN_REASON_MICHAEL_MIC_FAILURE);
1712                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1713                                 WLAN_STA_AUTHORIZED);
1714                 hostapd_sta_remove(hapd, sta->addr);
1715         }
1716 }
1717
1718
1719 void ieee80211_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr,
1720                                    int local)
1721 {
1722         time_t now;
1723
1724         if (addr && local) {
1725                 struct sta_info *sta = ap_get_sta(hapd, addr);
1726                 if (sta != NULL) {
1727                         wpa_auth_sta_local_mic_failure_report(sta->wpa_sm);
1728                         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
1729                                        HOSTAPD_LEVEL_INFO,
1730                                        "Michael MIC failure detected in "
1731                                        "received frame");
1732                         mlme_michaelmicfailure_indication(hapd, addr);
1733                 } else {
1734                         wpa_printf(MSG_DEBUG,
1735                                    "MLME-MICHAELMICFAILURE.indication "
1736                                    "for not associated STA (" MACSTR
1737                                    ") ignored", MAC2STR(addr));
1738                         return;
1739                 }
1740         }
1741
1742         time(&now);
1743         if (now > hapd->michael_mic_failure + 60) {
1744                 hapd->michael_mic_failures = 1;
1745         } else {
1746                 hapd->michael_mic_failures++;
1747                 if (hapd->michael_mic_failures > 1)
1748                         ieee80211_tkip_countermeasures_start(hapd);
1749         }
1750         hapd->michael_mic_failure = now;
1751 }
1752
1753
1754 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1755 {
1756         /* TODO */
1757         return 0;
1758 }
1759
1760
1761 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1762                            char *buf, size_t buflen)
1763 {
1764         /* TODO */
1765         return 0;
1766 }
1767
1768 #endif /* CONFIG_NATIVE_WINDOWS */