hostapd/ieee802_11.c

   1 /*
   2  * hostapd / IEEE 802.11 Management
   3  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #ifndef CONFIG_NATIVE_WINDOWS
  18
  19 #include <net/if.h>
  20
  21 #include "common.h"
  22 #include "eloop.h"
  23 #include "crypto/crypto.h"
  24 #include "common/wpa_ctrl.h"
  25 #include "radius/radius.h"
  26 #include "radius/radius_client.h"
  27 #include "hostapd.h"
  28 #include "ieee802_11.h"
  29 #include "beacon.h"
  30 #include "hw_features.h"
  31 #include "ieee802_11_auth.h"
  32 #include "sta_info.h"
  33 #include "ieee802_1x.h"
  34 #include "wpa.h"
  35 #include "wme.h"
  36 #include "ap_list.h"
  37 #include "accounting.h"
  38 #include "driver_i.h"
  39 #include "mlme.h"
  40
  41
  42 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
  43 {
  44         u8 *pos = eid;
  45         int i, num, count;
  46
  47         if (hapd->iface->current_rates == NULL)
  48                 return eid;
  49
  50         *pos++ = WLAN_EID_SUPP_RATES;
  51         num = hapd->iface->num_rates;
  52         if (num > 8) {
  53                 /* rest of the rates are encoded in Extended supported
  54                  * rates element */
  55                 num = 8;
  56         }
  57
  58         *pos++ = num;
  59         count = 0;
  60         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
  61              i++) {
  62                 count++;
  63                 *pos = hapd->iface->current_rates[i].rate / 5;
  64                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
  65                         *pos |= 0x80;
  66                 pos++;
  67         }
  68
  69         return pos;
  70 }
  71
  72
  73 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
  74 {
  75         u8 *pos = eid;
  76         int i, num, count;
  77
  78         if (hapd->iface->current_rates == NULL)
  79                 return eid;
  80
  81         num = hapd->iface->num_rates;
  82         if (num <= 8)
  83                 return eid;
  84         num -= 8;
  85
  86         *pos++ = WLAN_EID_EXT_SUPP_RATES;
  87         *pos++ = num;
  88         count = 0;
  89         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
  90              i++) {
  91                 count++;
  92                 if (count <= 8)
  93                         continue; /* already in SuppRates IE */
  94                 *pos = hapd->iface->current_rates[i].rate / 5;
  95                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
  96                         *pos |= 0x80;
  97                 pos++;
  98         }
  99
 100         return pos;
 101 }
 102
 103
 104 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
 105                            int probe)
 106 {
 107         int capab = WLAN_CAPABILITY_ESS;
 108         int privacy;
 109
 110         if (hapd->iface->num_sta_no_short_preamble == 0 &&
 111             hapd->iconf->preamble == SHORT_PREAMBLE)
 112                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 113
 114         privacy = hapd->conf->ssid.wep.keys_set;
 115
 116         if (hapd->conf->ieee802_1x &&
 117             (hapd->conf->default_wep_key_len ||
 118              hapd->conf->individual_wep_key_len))
 119                 privacy = 1;
 120
 121         if (hapd->conf->wpa)
 122                 privacy = 1;
 123
 124         if (sta) {
 125                 int policy, def_klen;
 126                 if (probe && sta->ssid_probe) {
 127                         policy = sta->ssid_probe->security_policy;
 128                         def_klen = sta->ssid_probe->wep.default_len;
 129                 } else {
 130                         policy = sta->ssid->security_policy;
 131                         def_klen = sta->ssid->wep.default_len;
 132                 }
 133                 privacy = policy != SECURITY_PLAINTEXT;
 134                 if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
 135                         privacy = 0;
 136         }
 137
 138         if (privacy)
 139                 capab |= WLAN_CAPABILITY_PRIVACY;
 140
 141         if (hapd->iface->current_mode &&
 142             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
 143             hapd->iface->num_sta_no_short_slot_time == 0)
 144                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 145
 146         return capab;
 147 }
 148
 149
 150 #ifdef CONFIG_IEEE80211W
 151 static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
 152                                             struct sta_info *sta, u8 *eid)
 153 {
 154         u8 *pos = eid;
 155         u32 timeout, tu;
 156         struct os_time now, passed;
 157
 158         *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
 159         *pos++ = 5;
 160         *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK;
 161         os_get_time(&now);
 162         os_time_sub(&now, &sta->sa_query_start, &passed);
 163         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 164         if (hapd->conf->assoc_sa_query_max_timeout > tu)
 165                 timeout = hapd->conf->assoc_sa_query_max_timeout - tu;
 166         else
 167                 timeout = 0;
 168         if (timeout < hapd->conf->assoc_sa_query_max_timeout)
 169                 timeout++; /* add some extra time for local timers */
 170         WPA_PUT_LE32(pos, timeout);
 171         pos += 4;
 172
 173         return pos;
 174 }
 175 #endif /* CONFIG_IEEE80211W */
 176
 177
 178 void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len)
 179 {
 180         int i;
 181         if (len > HOSTAPD_MAX_SSID_LEN)
 182                 len = HOSTAPD_MAX_SSID_LEN;
 183         for (i = 0; i < len; i++) {
 184                 if (ssid[i] >= 32 && ssid[i] < 127)
 185                         buf[i] = ssid[i];
 186                 else
 187                         buf[i] = '.';
 188         }
 189         buf[len] = '\0';
 190 }
 191
 192
 193 /**
 194  * ieee802_11_send_deauth - Send Deauthentication frame
 195  * @hapd: hostapd BSS data
 196  * @addr: Address of the destination STA
 197  * @reason: Reason code for Deauthentication
 198  */
 199 void ieee802_11_send_deauth(struct hostapd_data *hapd, const u8 *addr,
 200                             u16 reason)
 201 {
 202         struct ieee80211_mgmt mgmt;
 203
 204         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 205                        HOSTAPD_LEVEL_DEBUG,
 206                        "deauthenticate - reason %d", reason);
 207         os_memset(&mgmt, 0, sizeof(mgmt));
 208         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 209                                           WLAN_FC_STYPE_DEAUTH);
 210         os_memcpy(mgmt.da, addr, ETH_ALEN);
 211         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 212         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 213         mgmt.u.deauth.reason_code = host_to_le16(reason);
 214         if (hapd->drv.send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
 215                                        sizeof(mgmt.u.deauth)) < 0)
 216                 perror("ieee802_11_send_deauth: send");
 217 }
 218
 219
 220 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
 221                            u16 auth_transaction, const u8 *challenge,
 222                            int iswep)
 223 {
 224         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 225                        HOSTAPD_LEVEL_DEBUG,
 226                        "authentication (shared key, transaction %d)",
 227                        auth_transaction);
 228
 229         if (auth_transaction == 1) {
 230                 if (!sta->challenge) {
 231                         /* Generate a pseudo-random challenge */
 232                         u8 key[8];
 233                         time_t now;
 234                         int r;
 235                         sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
 236                         if (sta->challenge == NULL)
 237                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 238
 239                         now = time(NULL);
 240                         r = random();
 241                         os_memcpy(key, &now, 4);
 242                         os_memcpy(key + 4, &r, 4);
 243                         rc4_skip(key, sizeof(key), 0,
 244                                  sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
 245                 }
 246                 return 0;
 247         }
 248
 249         if (auth_transaction != 3)
 250                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 251
 252         /* Transaction 3 */
 253         if (!iswep || !sta->challenge || !challenge ||
 254             os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
 255                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 256                                HOSTAPD_LEVEL_INFO,
 257                                "shared key authentication - invalid "
 258                                "challenge-response");
 259                 return WLAN_STATUS_CHALLENGE_FAIL;
 260         }
 261
 262         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 263                        HOSTAPD_LEVEL_DEBUG,
 264                        "authentication OK (shared key)");
 265 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 266         /* Station will be marked authenticated if it ACKs the
 267          * authentication reply. */
 268 #else
 269         sta->flags |= WLAN_STA_AUTH;
 270         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 271 #endif
 272         os_free(sta->challenge);
 273         sta->challenge = NULL;
 274
 275         return 0;
 276 }
 277
 278
 279 static void send_auth_reply(struct hostapd_data *hapd,
 280                             const u8 *dst, const u8 *bssid,
 281                             u16 auth_alg, u16 auth_transaction, u16 resp,
 282                             const u8 *ies, size_t ies_len)
 283 {
 284         struct ieee80211_mgmt *reply;
 285         u8 *buf;
 286         size_t rlen;
 287
 288         rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
 289         buf = os_zalloc(rlen);
 290         if (buf == NULL)
 291                 return;
 292
 293         reply = (struct ieee80211_mgmt *) buf;
 294         reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 295                                             WLAN_FC_STYPE_AUTH);
 296         os_memcpy(reply->da, dst, ETH_ALEN);
 297         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
 298         os_memcpy(reply->bssid, bssid, ETH_ALEN);
 299
 300         reply->u.auth.auth_alg = host_to_le16(auth_alg);
 301         reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
 302         reply->u.auth.status_code = host_to_le16(resp);
 303
 304         if (ies && ies_len)
 305                 os_memcpy(reply->u.auth.variable, ies, ies_len);
 306
 307         wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
 308                    " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
 309                    MAC2STR(dst), auth_alg, auth_transaction,
 310                    resp, (unsigned long) ies_len);
 311         if (hapd->drv.send_mgmt_frame(hapd, reply, rlen) < 0)
 312                 perror("send_auth_reply: send");
 313
 314         os_free(buf);
 315 }
 316
 317
 318 #ifdef CONFIG_IEEE80211R
 319 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
 320                                   u16 auth_transaction, u16 status,
 321                                   const u8 *ies, size_t ies_len)
 322 {
 323         struct hostapd_data *hapd = ctx;
 324         struct sta_info *sta;
 325
 326         send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
 327                         status, ies, ies_len);
 328
 329         if (status != WLAN_STATUS_SUCCESS)
 330                 return;
 331
 332         sta = ap_get_sta(hapd, dst);
 333         if (sta == NULL)
 334                 return;
 335
 336         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
 337                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
 338         sta->flags |= WLAN_STA_AUTH;
 339         mlme_authenticate_indication(hapd, sta);
 340 }
 341 #endif /* CONFIG_IEEE80211R */
 342
 343
 344 static void handle_auth(struct hostapd_data *hapd,
 345                         const struct ieee80211_mgmt *mgmt, size_t len)
 346 {
 347         u16 auth_alg, auth_transaction, status_code;
 348         u16 resp = WLAN_STATUS_SUCCESS;
 349         struct sta_info *sta = NULL;
 350         int res;
 351         u16 fc;
 352         const u8 *challenge = NULL;
 353         u32 session_timeout, acct_interim_interval;
 354         int vlan_id = 0;
 355         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
 356         size_t resp_ies_len = 0;
 357
 358         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
 359                 printf("handle_auth - too short payload (len=%lu)\n",
 360                        (unsigned long) len);
 361                 return;
 362         }
 363
 364         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
 365         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
 366         status_code = le_to_host16(mgmt->u.auth.status_code);
 367         fc = le_to_host16(mgmt->frame_control);
 368
 369         if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
 370             2 + WLAN_AUTH_CHALLENGE_LEN &&
 371             mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
 372             mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
 373                 challenge = &mgmt->u.auth.variable[2];
 374
 375         wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
 376                    "auth_transaction=%d status_code=%d wep=%d%s",
 377                    MAC2STR(mgmt->sa), auth_alg, auth_transaction,
 378                    status_code, !!(fc & WLAN_FC_ISWEP),
 379                    challenge ? " challenge" : "");
 380
 381         if (hapd->tkip_countermeasures) {
 382                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 383                 goto fail;
 384         }
 385
 386         if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
 387                auth_alg == WLAN_AUTH_OPEN) ||
 388 #ifdef CONFIG_IEEE80211R
 389               (hapd->conf->wpa &&
 390                (hapd->conf->wpa_key_mgmt &
 391                 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
 392                auth_alg == WLAN_AUTH_FT) ||
 393 #endif /* CONFIG_IEEE80211R */
 394               ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
 395                auth_alg == WLAN_AUTH_SHARED_KEY))) {
 396                 printf("Unsupported authentication algorithm (%d)\n",
 397                        auth_alg);
 398                 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
 399                 goto fail;
 400         }
 401
 402         if (!(auth_transaction == 1 ||
 403               (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
 404                 printf("Unknown authentication transaction number (%d)\n",
 405                        auth_transaction);
 406                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
 407                 goto fail;
 408         }
 409
 410         if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
 411                 printf("Station " MACSTR " not allowed to authenticate.\n",
 412                        MAC2STR(mgmt->sa));
 413                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 414                 goto fail;
 415         }
 416
 417         res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
 418                                       &session_timeout,
 419                                       &acct_interim_interval, &vlan_id);
 420         if (res == HOSTAPD_ACL_REJECT) {
 421                 printf("Station " MACSTR " not allowed to authenticate.\n",
 422                        MAC2STR(mgmt->sa));
 423                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 424                 goto fail;
 425         }
 426         if (res == HOSTAPD_ACL_PENDING) {
 427                 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
 428                            " waiting for an external authentication",
 429                            MAC2STR(mgmt->sa));
 430                 /* Authentication code will re-send the authentication frame
 431                  * after it has received (and cached) information from the
 432                  * external source. */
 433                 return;
 434         }
 435
 436         sta = ap_sta_add(hapd, mgmt->sa);
 437         if (!sta) {
 438                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 439                 goto fail;
 440         }
 441
 442         if (vlan_id > 0) {
 443                 if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 444                                                vlan_id) == NULL) {
 445                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 446                                        HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
 447                                        "%d received from RADIUS server",
 448                                        vlan_id);
 449                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 450                         goto fail;
 451                 }
 452                 sta->vlan_id = vlan_id;
 453                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 454                                HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
 455         }
 456
 457         sta->flags &= ~WLAN_STA_PREAUTH;
 458         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
 459
 460         if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
 461                 sta->acct_interim_interval = acct_interim_interval;
 462         if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
 463                 ap_sta_session_timeout(hapd, sta, session_timeout);
 464         else
 465                 ap_sta_no_session_timeout(hapd, sta);
 466
 467         switch (auth_alg) {
 468         case WLAN_AUTH_OPEN:
 469                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 470                                HOSTAPD_LEVEL_DEBUG,
 471                                "authentication OK (open system)");
 472 #ifdef IEEE80211_REQUIRE_AUTH_ACK
 473                 /* Station will be marked authenticated if it ACKs the
 474                  * authentication reply. */
 475 #else
 476                 sta->flags |= WLAN_STA_AUTH;
 477                 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
 478                 sta->auth_alg = WLAN_AUTH_OPEN;
 479                 mlme_authenticate_indication(hapd, sta);
 480 #endif
 481                 break;
 482         case WLAN_AUTH_SHARED_KEY:
 483                 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
 484                                        fc & WLAN_FC_ISWEP);
 485                 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
 486                 mlme_authenticate_indication(hapd, sta);
 487                 if (sta->challenge && auth_transaction == 1) {
 488                         resp_ies[0] = WLAN_EID_CHALLENGE;
 489                         resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
 490                         os_memcpy(resp_ies + 2, sta->challenge,
 491                                   WLAN_AUTH_CHALLENGE_LEN);
 492                         resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
 493                 }
 494                 break;
 495 #ifdef CONFIG_IEEE80211R
 496         case WLAN_AUTH_FT:
 497                 sta->auth_alg = WLAN_AUTH_FT;
 498                 if (sta->wpa_sm == NULL)
 499                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 500                                                         sta->addr);
 501                 if (sta->wpa_sm == NULL) {
 502                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
 503                                    "state machine");
 504                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 505                         goto fail;
 506                 }
 507                 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
 508                                     auth_transaction, mgmt->u.auth.variable,
 509                                     len - IEEE80211_HDRLEN -
 510                                     sizeof(mgmt->u.auth),
 511                                     handle_auth_ft_finish, hapd);
 512                 /* handle_auth_ft_finish() callback will complete auth. */
 513                 return;
 514 #endif /* CONFIG_IEEE80211R */
 515         }
 516
 517  fail:
 518         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
 519                         auth_transaction + 1, resp, resp_ies, resp_ies_len);
 520 }
 521
 522
 523 static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
 524 {
 525         int i, j = 32, aid;
 526
 527         /* get a unique AID */
 528         if (sta->aid > 0) {
 529                 wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
 530                 return 0;
 531         }
 532
 533         for (i = 0; i < AID_WORDS; i++) {
 534                 if (hapd->sta_aid[i] == (u32) -1)
 535                         continue;
 536                 for (j = 0; j < 32; j++) {
 537                         if (!(hapd->sta_aid[i] & BIT(j)))
 538                                 break;
 539                 }
 540                 if (j < 32)
 541                         break;
 542         }
 543         if (j == 32)
 544                 return -1;
 545         aid = i * 32 + j + 1;
 546         if (aid > 2007)
 547                 return -1;
 548
 549         sta->aid = aid;
 550         hapd->sta_aid[i] |= BIT(j);
 551         wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
 552         return 0;
 553 }
 554
 555
 556 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
 557                       const u8 *ssid_ie, size_t ssid_ie_len)
 558 {
 559         if (ssid_ie == NULL)
 560                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 561
 562         if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
 563             os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
 564                 char ssid_txt[33];
 565                 ieee802_11_print_ssid(ssid_txt, ssid_ie, ssid_ie_len);
 566                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 567                                HOSTAPD_LEVEL_INFO,
 568                                "Station tried to associate with unknown SSID "
 569                                "'%s'", ssid_txt);
 570                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 571         }
 572
 573         return WLAN_STATUS_SUCCESS;
 574 }
 575
 576
 577 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
 578                      const u8 *wmm_ie, size_t wmm_ie_len)
 579 {
 580         sta->flags &= ~WLAN_STA_WMM;
 581         if (wmm_ie && hapd->conf->wmm_enabled) {
 582                 if (hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len))
 583                         hostapd_logger(hapd, sta->addr,
 584                                        HOSTAPD_MODULE_WPA,
 585                                        HOSTAPD_LEVEL_DEBUG,
 586                                        "invalid WMM element in association "
 587                                        "request");
 588                 else
 589                         sta->flags |= WLAN_STA_WMM;
 590         }
 591         return WLAN_STATUS_SUCCESS;
 592 }
 593
 594
 595 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
 596                            struct ieee802_11_elems *elems)
 597 {
 598         if (!elems->supp_rates) {
 599                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 600                                HOSTAPD_LEVEL_DEBUG,
 601                                "No supported rates element in AssocReq");
 602                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 603         }
 604
 605         if (elems->supp_rates_len > sizeof(sta->supported_rates)) {
 606                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 607                                HOSTAPD_LEVEL_DEBUG,
 608                                "Invalid supported rates element length %d",
 609                                elems->supp_rates_len);
 610                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 611         }
 612
 613         os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
 614         os_memcpy(sta->supported_rates, elems->supp_rates,
 615                   elems->supp_rates_len);
 616         sta->supported_rates_len = elems->supp_rates_len;
 617
 618         if (elems->ext_supp_rates) {
 619                 if (elems->supp_rates_len + elems->ext_supp_rates_len >
 620                     sizeof(sta->supported_rates)) {
 621                         hostapd_logger(hapd, sta->addr,
 622                                        HOSTAPD_MODULE_IEEE80211,
 623                                        HOSTAPD_LEVEL_DEBUG,
 624                                        "Invalid supported rates element length"
 625                                        " %d+%d", elems->supp_rates_len,
 626                                        elems->ext_supp_rates_len);
 627                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
 628                 }
 629
 630                 os_memcpy(sta->supported_rates + elems->supp_rates_len,
 631                           elems->ext_supp_rates, elems->ext_supp_rates_len);
 632                 sta->supported_rates_len += elems->ext_supp_rates_len;
 633         }
 634
 635         return WLAN_STATUS_SUCCESS;
 636 }
 637
 638
 639 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
 640                            const u8 *ies, size_t ies_len, int reassoc)
 641 {
 642         struct ieee802_11_elems elems;
 643         u16 resp;
 644         const u8 *wpa_ie;
 645         size_t wpa_ie_len;
 646
 647         if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
 648                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 649                                HOSTAPD_LEVEL_INFO, "Station sent an invalid "
 650                                "association request");
 651                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 652         }
 653
 654         resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
 655         if (resp != WLAN_STATUS_SUCCESS)
 656                 return resp;
 657         resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
 658         if (resp != WLAN_STATUS_SUCCESS)
 659                 return resp;
 660         resp = copy_supp_rates(hapd, sta, &elems);
 661         if (resp != WLAN_STATUS_SUCCESS)
 662                 return resp;
 663 #ifdef CONFIG_IEEE80211N
 664         resp = copy_sta_ht_capab(sta, elems.ht_capabilities,
 665                                  elems.ht_capabilities_len);
 666         if (resp != WLAN_STATUS_SUCCESS)
 667                 return resp;
 668 #endif /* CONFIG_IEEE80211N */
 669
 670         if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
 671                 wpa_ie = elems.rsn_ie;
 672                 wpa_ie_len = elems.rsn_ie_len;
 673         } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
 674                    elems.wpa_ie) {
 675                 wpa_ie = elems.wpa_ie;
 676                 wpa_ie_len = elems.wpa_ie_len;
 677         } else {
 678                 wpa_ie = NULL;
 679                 wpa_ie_len = 0;
 680         }
 681
 682 #ifdef CONFIG_WPS
 683         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
 684         if (hapd->conf->wps_state && wpa_ie == NULL) {
 685                 if (elems.wps_ie) {
 686                         wpa_printf(MSG_DEBUG, "STA included WPS IE in "
 687                                    "(Re)Association Request - assume WPS is "
 688                                    "used");
 689                         sta->flags |= WLAN_STA_WPS;
 690                         wpabuf_free(sta->wps_ie);
 691                         sta->wps_ie = wpabuf_alloc_copy(elems.wps_ie + 4,
 692                                                         elems.wps_ie_len - 4);
 693                 } else {
 694                         wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE "
 695                                    "in (Re)Association Request - possible WPS "
 696                                    "use");
 697                         sta->flags |= WLAN_STA_MAYBE_WPS;
 698                 }
 699         } else
 700 #endif /* CONFIG_WPS */
 701         if (hapd->conf->wpa && wpa_ie == NULL) {
 702                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 703                                HOSTAPD_LEVEL_INFO,
 704                                "No WPA/RSN IE in association request");
 705                 return WLAN_STATUS_INVALID_IE;
 706         }
 707
 708         if (hapd->conf->wpa && wpa_ie) {
 709                 int res;
 710                 wpa_ie -= 2;
 711                 wpa_ie_len += 2;
 712                 if (sta->wpa_sm == NULL)
 713                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 714                                                         sta->addr);
 715                 if (sta->wpa_sm == NULL) {
 716                         wpa_printf(MSG_WARNING, "Failed to initialize WPA "
 717                                    "state machine");
 718                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
 719                 }
 720                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 721                                           wpa_ie, wpa_ie_len,
 722                                           elems.mdie, elems.mdie_len);
 723                 if (res == WPA_INVALID_GROUP)
 724                         resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
 725                 else if (res == WPA_INVALID_PAIRWISE)
 726                         resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
 727                 else if (res == WPA_INVALID_AKMP)
 728                         resp = WLAN_STATUS_AKMP_NOT_VALID;
 729                 else if (res == WPA_ALLOC_FAIL)
 730                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 731 #ifdef CONFIG_IEEE80211W
 732                 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
 733                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
 734                 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
 735                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
 736 #endif /* CONFIG_IEEE80211W */
 737                 else if (res == WPA_INVALID_MDIE)
 738                         resp = WLAN_STATUS_INVALID_MDIE;
 739                 else if (res != WPA_IE_OK)
 740                         resp = WLAN_STATUS_INVALID_IE;
 741                 if (resp != WLAN_STATUS_SUCCESS)
 742                         return resp;
 743 #ifdef CONFIG_IEEE80211W
 744                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
 745                     sta->sa_query_count > 0)
 746                         ap_check_sa_query_timeout(hapd, sta);
 747                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
 748                     (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
 749                         /*
 750                          * STA has already been associated with MFP and SA
 751                          * Query timeout has not been reached. Reject the
 752                          * association attempt temporarily and start SA Query,
 753                          * if one is not pending.
 754                          */
 755
 756                         if (sta->sa_query_count == 0)
 757                                 ap_sta_start_sa_query(hapd, sta);
 758
 759                         return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
 760                 }
 761
 762                 if (wpa_auth_uses_mfp(sta->wpa_sm))
 763                         sta->flags |= WLAN_STA_MFP;
 764                 else
 765                         sta->flags &= ~WLAN_STA_MFP;
 766 #endif /* CONFIG_IEEE80211W */
 767
 768 #ifdef CONFIG_IEEE80211R
 769                 if (sta->auth_alg == WLAN_AUTH_FT) {
 770                         if (!reassoc) {
 771                                 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
 772                                            "to use association (not "
 773                                            "re-association) with FT auth_alg",
 774                                            MAC2STR(sta->addr));
 775                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 776                         }
 777
 778                         resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
 779                                                        ies_len);
 780                         if (resp != WLAN_STATUS_SUCCESS)
 781                                 return resp;
 782                 }
 783 #endif /* CONFIG_IEEE80211R */
 784
 785 #ifdef CONFIG_IEEE80211N
 786                 if ((sta->flags & WLAN_STA_HT) &&
 787                     wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
 788                         hostapd_logger(hapd, sta->addr,
 789                                        HOSTAPD_MODULE_IEEE80211,
 790                                        HOSTAPD_LEVEL_INFO,
 791                                        "Station tried to use TKIP with HT "
 792                                        "association");
 793                         return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
 794                 }
 795 #endif /* CONFIG_IEEE80211N */
 796         } else
 797                 wpa_auth_sta_no_wpa(sta->wpa_sm);
 798
 799         return WLAN_STATUS_SUCCESS;
 800 }
 801
 802
 803 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
 804                         u16 reason_code)
 805 {
 806         int send_len;
 807         struct ieee80211_mgmt reply;
 808
 809         os_memset(&reply, 0, sizeof(reply));
 810         reply.frame_control =
 811                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
 812         os_memcpy(reply.da, addr, ETH_ALEN);
 813         os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
 814         os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
 815
 816         send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
 817         reply.u.deauth.reason_code = host_to_le16(reason_code);
 818
 819         if (hapd->drv.send_mgmt_frame(hapd, &reply, send_len) < 0)
 820                 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
 821                            strerror(errno));
 822 }
 823
 824
 825 static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
 826                             u16 status_code, int reassoc, const u8 *ies,
 827                             size_t ies_len)
 828 {
 829         int send_len;
 830         u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
 831         struct ieee80211_mgmt *reply;
 832         u8 *p;
 833
 834         os_memset(buf, 0, sizeof(buf));
 835         reply = (struct ieee80211_mgmt *) buf;
 836         reply->frame_control =
 837                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 838                              (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
 839                               WLAN_FC_STYPE_ASSOC_RESP));
 840         os_memcpy(reply->da, sta->addr, ETH_ALEN);
 841         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
 842         os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
 843
 844         send_len = IEEE80211_HDRLEN;
 845         send_len += sizeof(reply->u.assoc_resp);
 846         reply->u.assoc_resp.capab_info =
 847                 host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
 848         reply->u.assoc_resp.status_code = host_to_le16(status_code);
 849         reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
 850                                                | BIT(14) | BIT(15));
 851         /* Supported rates */
 852         p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
 853         /* Extended supported rates */
 854         p = hostapd_eid_ext_supp_rates(hapd, p);
 855         if (sta->flags & WLAN_STA_WMM)
 856                 p = hostapd_eid_wmm(hapd, p);
 857
 858 #ifdef CONFIG_IEEE80211N
 859         p = hostapd_eid_ht_capabilities(hapd, p);
 860         p = hostapd_eid_ht_operation(hapd, p);
 861 #endif /* CONFIG_IEEE80211N */
 862
 863 #ifdef CONFIG_IEEE80211R
 864         if (status_code == WLAN_STATUS_SUCCESS) {
 865                 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
 866                  * Transition Information, RSN, [RIC Response] */
 867                 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
 868                                                 buf + sizeof(buf) - p,
 869                                                 sta->auth_alg, ies, ies_len);
 870         }
 871 #endif /* CONFIG_IEEE80211R */
 872
 873 #ifdef CONFIG_IEEE80211W
 874         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
 875                 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
 876 #endif /* CONFIG_IEEE80211W */
 877
 878         send_len += p - reply->u.assoc_resp.variable;
 879
 880         if (hapd->drv.send_mgmt_frame(hapd, reply, send_len) < 0)
 881                 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
 882                            strerror(errno));
 883 }
 884
 885
 886 static void handle_assoc(struct hostapd_data *hapd,
 887                          const struct ieee80211_mgmt *mgmt, size_t len,
 888                          int reassoc)
 889 {
 890         u16 capab_info, listen_interval;
 891         u16 resp = WLAN_STATUS_SUCCESS;
 892         const u8 *pos;
 893         int left, i;
 894         struct sta_info *sta;
 895
 896         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
 897                                       sizeof(mgmt->u.assoc_req))) {
 898                 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
 899                        "\n", reassoc, (unsigned long) len);
 900                 return;
 901         }
 902
 903         if (reassoc) {
 904                 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
 905                 listen_interval = le_to_host16(
 906                         mgmt->u.reassoc_req.listen_interval);
 907                 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
 908                            " capab_info=0x%02x listen_interval=%d current_ap="
 909                            MACSTR,
 910                            MAC2STR(mgmt->sa), capab_info, listen_interval,
 911                            MAC2STR(mgmt->u.reassoc_req.current_ap));
 912                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
 913                 pos = mgmt->u.reassoc_req.variable;
 914         } else {
 915                 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
 916                 listen_interval = le_to_host16(
 917                         mgmt->u.assoc_req.listen_interval);
 918                 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
 919                            " capab_info=0x%02x listen_interval=%d",
 920                            MAC2STR(mgmt->sa), capab_info, listen_interval);
 921                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
 922                 pos = mgmt->u.assoc_req.variable;
 923         }
 924
 925         sta = ap_get_sta(hapd, mgmt->sa);
 926 #ifdef CONFIG_IEEE80211R
 927         if (sta && sta->auth_alg == WLAN_AUTH_FT &&
 928             (sta->flags & WLAN_STA_AUTH) == 0) {
 929                 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
 930                            "prior to authentication since it is using "
 931                            "over-the-DS FT", MAC2STR(mgmt->sa));
 932         } else
 933 #endif /* CONFIG_IEEE80211R */
 934         if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
 935                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 936                                HOSTAPD_LEVEL_INFO, "Station tried to "
 937                                "associate before authentication "
 938                                "(aid=%d flags=0x%x)",
 939                                sta ? sta->aid : -1,
 940                                sta ? sta->flags : 0);
 941                 send_deauth(hapd, mgmt->sa,
 942                             WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
 943                 return;
 944         }
 945
 946         if (hapd->tkip_countermeasures) {
 947                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
 948                 goto fail;
 949         }
 950
 951         if (listen_interval > hapd->conf->max_listen_interval) {
 952                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 953                                HOSTAPD_LEVEL_DEBUG,
 954                                "Too large Listen Interval (%d)",
 955                                listen_interval);
 956                 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
 957                 goto fail;
 958         }
 959
 960         /* followed by SSID and Supported rates; and HT capabilities if 802.11n
 961          * is used */
 962         resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
 963         if (resp != WLAN_STATUS_SUCCESS)
 964                 goto fail;
 965
 966         if (hostapd_get_aid(hapd, sta) < 0) {
 967                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
 968                                HOSTAPD_LEVEL_INFO, "No room for more AIDs");
 969                 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
 970                 goto fail;
 971         }
 972
 973         sta->capability = capab_info;
 974         sta->listen_interval = listen_interval;
 975
 976         if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 977                 sta->flags |= WLAN_STA_NONERP;
 978         for (i = 0; i < sta->supported_rates_len; i++) {
 979                 if ((sta->supported_rates[i] & 0x7f) > 22) {
 980                         sta->flags &= ~WLAN_STA_NONERP;
 981                         break;
 982                 }
 983         }
 984         if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
 985                 sta->nonerp_set = 1;
 986                 hapd->iface->num_sta_non_erp++;
 987                 if (hapd->iface->num_sta_non_erp == 1)
 988                         ieee802_11_set_beacons(hapd->iface);
 989         }
 990
 991         if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
 992             !sta->no_short_slot_time_set) {
 993                 sta->no_short_slot_time_set = 1;
 994                 hapd->iface->num_sta_no_short_slot_time++;
 995                 if (hapd->iface->current_mode->mode ==
 996                     HOSTAPD_MODE_IEEE80211G &&
 997                     hapd->iface->num_sta_no_short_slot_time == 1)
 998                         ieee802_11_set_beacons(hapd->iface);
 999         }
1000
1001         if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1002                 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
1003         else
1004                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
1005
1006         if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
1007             !sta->no_short_preamble_set) {
1008                 sta->no_short_preamble_set = 1;
1009                 hapd->iface->num_sta_no_short_preamble++;
1010                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
1011                     && hapd->iface->num_sta_no_short_preamble == 1)
1012                         ieee802_11_set_beacons(hapd->iface);
1013         }
1014
1015 #ifdef CONFIG_IEEE80211N
1016         update_ht_state(hapd, sta);
1017 #endif /* CONFIG_IEEE80211N */
1018
1019         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1020                        HOSTAPD_LEVEL_DEBUG,
1021                        "association OK (aid %d)", sta->aid);
1022         /* Station will be marked associated, after it acknowledges AssocResp
1023          */
1024
1025 #ifdef CONFIG_IEEE80211W
1026         if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
1027                 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
1028                            "SA Query procedure", reassoc ? "re" : "");
1029                 /* TODO: Send a protected Disassociate frame to the STA using
1030                  * the old key and Reason Code "Previous Authentication no
1031                  * longer valid". Make sure this is only sent protected since
1032                  * unprotected frame would be received by the STA that is now
1033                  * trying to associate.
1034                  */
1035         }
1036 #endif /* CONFIG_IEEE80211W */
1037
1038         if (reassoc) {
1039                 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap,
1040                           ETH_ALEN);
1041         }
1042
1043         if (sta->last_assoc_req)
1044                 os_free(sta->last_assoc_req);
1045         sta->last_assoc_req = os_malloc(len);
1046         if (sta->last_assoc_req)
1047                 os_memcpy(sta->last_assoc_req, mgmt, len);
1048
1049         /* Make sure that the previously registered inactivity timer will not
1050          * remove the STA immediately. */
1051         sta->timeout_next = STA_NULLFUNC;
1052
1053  fail:
1054         send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
1055 }
1056
1057
1058 static void handle_disassoc(struct hostapd_data *hapd,
1059                             const struct ieee80211_mgmt *mgmt, size_t len)
1060 {
1061         struct sta_info *sta;
1062
1063         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1064                 printf("handle_disassoc - too short payload (len=%lu)\n",
1065                        (unsigned long) len);
1066                 return;
1067         }
1068
1069         wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1070                    MAC2STR(mgmt->sa),
1071                    le_to_host16(mgmt->u.disassoc.reason_code));
1072
1073         sta = ap_get_sta(hapd, mgmt->sa);
1074         if (sta == NULL) {
1075                 printf("Station " MACSTR " trying to disassociate, but it "
1076                        "is not associated.\n", MAC2STR(mgmt->sa));
1077                 return;
1078         }
1079
1080         sta->flags &= ~WLAN_STA_ASSOC;
1081         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
1082                 MAC2STR(sta->addr));
1083         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1084         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1085                        HOSTAPD_LEVEL_INFO, "disassociated");
1086         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1087         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1088         /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1089          * authenticated. */
1090         accounting_sta_stop(hapd, sta);
1091         ieee802_1x_free_station(sta);
1092         hostapd_sta_remove(hapd, sta->addr);
1093
1094         if (sta->timeout_next == STA_NULLFUNC ||
1095             sta->timeout_next == STA_DISASSOC) {
1096                 sta->timeout_next = STA_DEAUTH;
1097                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1098                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1099                                        hapd, sta);
1100         }
1101
1102         mlme_disassociate_indication(
1103                 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1104 }
1105
1106
1107 static void handle_deauth(struct hostapd_data *hapd,
1108                           const struct ieee80211_mgmt *mgmt, size_t len)
1109 {
1110         struct sta_info *sta;
1111
1112         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1113                 printf("handle_deauth - too short payload (len=%lu)\n",
1114                        (unsigned long) len);
1115                 return;
1116         }
1117
1118         wpa_printf(MSG_DEBUG, "deauthentication: STA=" MACSTR
1119                    " reason_code=%d",
1120                    MAC2STR(mgmt->sa),
1121                    le_to_host16(mgmt->u.deauth.reason_code));
1122
1123         sta = ap_get_sta(hapd, mgmt->sa);
1124         if (sta == NULL) {
1125                 printf("Station " MACSTR " trying to deauthenticate, but it "
1126                        "is not authenticated.\n", MAC2STR(mgmt->sa));
1127                 return;
1128         }
1129
1130         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1131         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
1132                 MAC2STR(sta->addr));
1133         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1134         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1135                        HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1136         mlme_deauthenticate_indication(
1137                 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1138         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1139         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1140         ap_free_sta(hapd, sta);
1141 }
1142
1143
1144 static void handle_beacon(struct hostapd_data *hapd,
1145                           const struct ieee80211_mgmt *mgmt, size_t len,
1146                           struct hostapd_frame_info *fi)
1147 {
1148         struct ieee802_11_elems elems;
1149
1150         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1151                 printf("handle_beacon - too short payload (len=%lu)\n",
1152                        (unsigned long) len);
1153                 return;
1154         }
1155
1156         (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1157                                       len - (IEEE80211_HDRLEN +
1158                                              sizeof(mgmt->u.beacon)), &elems,
1159                                       0);
1160
1161         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1162 }
1163
1164
1165 #ifdef CONFIG_IEEE80211W
1166
1167 /* MLME-SAQuery.request */
1168 void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
1169                                   const u8 *addr, const u8 *trans_id)
1170 {
1171         struct ieee80211_mgmt mgmt;
1172         u8 *end;
1173
1174         wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to "
1175                    MACSTR, MAC2STR(addr));
1176         wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
1177                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1178
1179         os_memset(&mgmt, 0, sizeof(mgmt));
1180         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1181                                           WLAN_FC_STYPE_ACTION);
1182         os_memcpy(mgmt.da, addr, ETH_ALEN);
1183         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
1184         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
1185         mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
1186         mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
1187         os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
1188                   WLAN_SA_QUERY_TR_ID_LEN);
1189         end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
1190         if (hapd->drv.send_mgmt_frame(hapd, &mgmt, end - (u8 *) &mgmt) < 0)
1191                 perror("ieee802_11_send_sa_query_req: send");
1192 }
1193
1194
1195 static void hostapd_sa_query_action(struct hostapd_data *hapd,
1196                                     const struct ieee80211_mgmt *mgmt,
1197                                     size_t len)
1198 {
1199         struct sta_info *sta;
1200         const u8 *end;
1201         int i;
1202
1203         end = mgmt->u.action.u.sa_query_resp.trans_id +
1204                 WLAN_SA_QUERY_TR_ID_LEN;
1205         if (((u8 *) mgmt) + len < end) {
1206                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
1207                            "frame (len=%lu)", (unsigned long) len);
1208                 return;
1209         }
1210
1211         if (mgmt->u.action.u.sa_query_resp.action != WLAN_SA_QUERY_RESPONSE) {
1212                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query "
1213                            "Action %d", mgmt->u.action.u.sa_query_resp.action);
1214                 return;
1215         }
1216
1217         wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from "
1218                    MACSTR, MAC2STR(mgmt->sa));
1219         wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
1220                     mgmt->u.action.u.sa_query_resp.trans_id,
1221                     WLAN_SA_QUERY_TR_ID_LEN);
1222
1223         /* MLME-SAQuery.confirm */
1224
1225         sta = ap_get_sta(hapd, mgmt->sa);
1226         if (sta == NULL || sta->sa_query_trans_id == NULL) {
1227                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
1228                            "pending SA Query request found");
1229                 return;
1230         }
1231
1232         for (i = 0; i < sta->sa_query_count; i++) {
1233                 if (os_memcmp(sta->sa_query_trans_id +
1234                               i * WLAN_SA_QUERY_TR_ID_LEN,
1235                               mgmt->u.action.u.sa_query_resp.trans_id,
1236                               WLAN_SA_QUERY_TR_ID_LEN) == 0)
1237                         break;
1238         }
1239
1240         if (i >= sta->sa_query_count) {
1241                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query "
1242                            "transaction identifier found");
1243                 return;
1244         }
1245
1246         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1247                        HOSTAPD_LEVEL_DEBUG,
1248                        "Reply to pending SA Query received");
1249         ap_sta_stop_sa_query(hapd, sta);
1250 }
1251
1252
1253 static int robust_action_frame(u8 category)
1254 {
1255         return category != WLAN_ACTION_PUBLIC &&
1256                 category != WLAN_ACTION_HT;
1257 }
1258 #endif /* CONFIG_IEEE80211W */
1259
1260
1261 static void handle_action(struct hostapd_data *hapd,
1262                           const struct ieee80211_mgmt *mgmt, size_t len)
1263 {
1264         struct sta_info *sta;
1265
1266         if (len < IEEE80211_HDRLEN + 1) {
1267                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1268                                HOSTAPD_LEVEL_DEBUG,
1269                                "handle_action - too short payload (len=%lu)",
1270                                (unsigned long) len);
1271                 return;
1272         }
1273
1274         sta = ap_get_sta(hapd, mgmt->sa);
1275 #ifdef CONFIG_IEEE80211W
1276         if (sta && (sta->flags & WLAN_STA_MFP) &&
1277             !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP) &&
1278               robust_action_frame(mgmt->u.action.category))) {
1279                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1280                                HOSTAPD_LEVEL_DEBUG,
1281                                "Dropped unprotected Robust Action frame from "
1282                                "an MFP STA");
1283                 return;
1284         }
1285 #endif /* CONFIG_IEEE80211W */
1286
1287         switch (mgmt->u.action.category) {
1288 #ifdef CONFIG_IEEE80211R
1289         case WLAN_ACTION_FT:
1290         {
1291                 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
1292                         wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action "
1293                                    "frame from unassociated STA " MACSTR,
1294                                    MAC2STR(mgmt->sa));
1295                         return;
1296                 }
1297
1298                 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
1299                                      len - IEEE80211_HDRLEN))
1300                         break;
1301
1302                 return;
1303         }
1304 #endif /* CONFIG_IEEE80211R */
1305         case WLAN_ACTION_WMM:
1306                 hostapd_wmm_action(hapd, mgmt, len);
1307                 return;
1308 #ifdef CONFIG_IEEE80211W
1309         case WLAN_ACTION_SA_QUERY:
1310                 hostapd_sa_query_action(hapd, mgmt, len);
1311                 return;
1312 #endif /* CONFIG_IEEE80211W */
1313         }
1314
1315         hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1316                        HOSTAPD_LEVEL_DEBUG,
1317                        "handle_action - unknown action category %d or invalid "
1318                        "frame",
1319                        mgmt->u.action.category);
1320         if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
1321             !(mgmt->sa[0] & 0x01)) {
1322                 struct ieee80211_mgmt *resp;
1323
1324                 /*
1325                  * IEEE 802.11-REVma/D9.0 - 7.3.1.11
1326                  * Return the Action frame to the source without change
1327                  * except that MSB of the Category set to 1.
1328                  */
1329                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
1330                            "frame back to sender");
1331                 resp = os_malloc(len);
1332                 if (resp == NULL)
1333                         return;
1334                 os_memcpy(resp, mgmt, len);
1335                 os_memcpy(resp->da, resp->sa, ETH_ALEN);
1336                 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
1337                 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
1338                 resp->u.action.category |= 0x80;
1339
1340                 hapd->drv.send_mgmt_frame(hapd, resp, len);
1341                 os_free(resp);
1342         }
1343 }
1344
1345
1346 /**
1347  * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
1348  * @hapd: hostapd BSS data structure (the BSS to which the management frame was
1349  * sent to)
1350  * @buf: management frame data (starting from IEEE 802.11 header)
1351  * @len: length of frame data in octets
1352  * @fi: meta data about received frame (signal level, etc.)
1353  *
1354  * Process all incoming IEEE 802.11 management frames. This will be called for
1355  * each frame received from the kernel driver through wlan#ap interface. In
1356  * addition, it can be called to re-inserted pending frames (e.g., when using
1357  * external RADIUS server as an MAC ACL).
1358  */
1359 void ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
1360                      struct hostapd_frame_info *fi)
1361 {
1362         struct ieee80211_mgmt *mgmt;
1363         int broadcast;
1364         u16 fc, stype;
1365
1366         mgmt = (struct ieee80211_mgmt *) buf;
1367         fc = le_to_host16(mgmt->frame_control);
1368         stype = WLAN_FC_GET_STYPE(fc);
1369
1370         if (stype == WLAN_FC_STYPE_BEACON) {
1371                 handle_beacon(hapd, mgmt, len, fi);
1372                 return;
1373         }
1374
1375         broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
1376                 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
1377                 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
1378
1379         if (!broadcast &&
1380             os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
1381                 printf("MGMT: BSSID=" MACSTR " not our address\n",
1382                        MAC2STR(mgmt->bssid));
1383                 return;
1384         }
1385
1386
1387         if (stype == WLAN_FC_STYPE_PROBE_REQ) {
1388                 handle_probe_req(hapd, mgmt, len);
1389                 return;
1390         }
1391
1392         if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
1393                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1394                                HOSTAPD_LEVEL_DEBUG,
1395                                "MGMT: DA=" MACSTR " not our address",
1396                                MAC2STR(mgmt->da));
1397                 return;
1398         }
1399
1400         switch (stype) {
1401         case WLAN_FC_STYPE_AUTH:
1402                 wpa_printf(MSG_DEBUG, "mgmt::auth");
1403                 handle_auth(hapd, mgmt, len);
1404                 break;
1405         case WLAN_FC_STYPE_ASSOC_REQ:
1406                 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
1407                 handle_assoc(hapd, mgmt, len, 0);
1408                 break;
1409         case WLAN_FC_STYPE_REASSOC_REQ:
1410                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
1411                 handle_assoc(hapd, mgmt, len, 1);
1412                 break;
1413         case WLAN_FC_STYPE_DISASSOC:
1414                 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
1415                 handle_disassoc(hapd, mgmt, len);
1416                 break;
1417         case WLAN_FC_STYPE_DEAUTH:
1418                 wpa_printf(MSG_DEBUG, "mgmt::deauth");
1419                 handle_deauth(hapd, mgmt, len);
1420                 break;
1421         case WLAN_FC_STYPE_ACTION:
1422                 wpa_printf(MSG_DEBUG, "mgmt::action");
1423                 handle_action(hapd, mgmt, len);
1424                 break;
1425         default:
1426                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1427                                HOSTAPD_LEVEL_DEBUG,
1428                                "unknown mgmt frame subtype %d", stype);
1429                 break;
1430         }
1431 }
1432
1433
1434 static void handle_auth_cb(struct hostapd_data *hapd,
1435                            const struct ieee80211_mgmt *mgmt,
1436                            size_t len, int ok)
1437 {
1438         u16 auth_alg, auth_transaction, status_code;
1439         struct sta_info *sta;
1440
1441         if (!ok) {
1442                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1443                                HOSTAPD_LEVEL_NOTICE,
1444                                "did not acknowledge authentication response");
1445                 return;
1446         }
1447
1448         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
1449                 printf("handle_auth_cb - too short payload (len=%lu)\n",
1450                        (unsigned long) len);
1451                 return;
1452         }
1453
1454         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1455         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
1456         status_code = le_to_host16(mgmt->u.auth.status_code);
1457
1458         sta = ap_get_sta(hapd, mgmt->da);
1459         if (!sta) {
1460                 printf("handle_auth_cb: STA " MACSTR " not found\n",
1461                        MAC2STR(mgmt->da));
1462                 return;
1463         }
1464
1465         if (status_code == WLAN_STATUS_SUCCESS &&
1466             ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
1467              (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
1468                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1469                                HOSTAPD_LEVEL_INFO, "authenticated");
1470                 sta->flags |= WLAN_STA_AUTH;
1471         }
1472 }
1473
1474
1475 static void handle_assoc_cb(struct hostapd_data *hapd,
1476                             const struct ieee80211_mgmt *mgmt,
1477                             size_t len, int reassoc, int ok)
1478 {
1479         u16 status;
1480         struct sta_info *sta;
1481         int new_assoc = 1;
1482         struct ieee80211_ht_capabilities ht_cap;
1483
1484         if (!ok) {
1485                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1486                                HOSTAPD_LEVEL_DEBUG,
1487                                "did not acknowledge association response");
1488                 return;
1489         }
1490
1491         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
1492                                       sizeof(mgmt->u.assoc_resp))) {
1493                 printf("handle_assoc_cb(reassoc=%d) - too short payload "
1494                        "(len=%lu)\n", reassoc, (unsigned long) len);
1495                 return;
1496         }
1497
1498         if (reassoc)
1499                 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
1500         else
1501                 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1502
1503         sta = ap_get_sta(hapd, mgmt->da);
1504         if (!sta) {
1505                 printf("handle_assoc_cb: STA " MACSTR " not found\n",
1506                        MAC2STR(mgmt->da));
1507                 return;
1508         }
1509
1510         if (status != WLAN_STATUS_SUCCESS)
1511                 goto fail;
1512
1513         /* Stop previous accounting session, if one is started, and allocate
1514          * new session id for the new session. */
1515         accounting_sta_stop(hapd, sta);
1516
1517         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1518                        HOSTAPD_LEVEL_INFO,
1519                        "associated (aid %d)",
1520                        sta->aid);
1521
1522         if (sta->flags & WLAN_STA_ASSOC)
1523                 new_assoc = 0;
1524         sta->flags |= WLAN_STA_ASSOC;
1525         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa) {
1526                 /* Open or static WEP; no separate authorization */
1527                 sta->flags |= WLAN_STA_AUTHORIZED;
1528                 wpa_msg(hapd->msg_ctx, MSG_INFO,
1529                         AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
1530         }
1531
1532         if (reassoc)
1533                 mlme_reassociate_indication(hapd, sta);
1534         else
1535                 mlme_associate_indication(hapd, sta);
1536
1537 #ifdef CONFIG_IEEE80211W
1538         sta->sa_query_timed_out = 0;
1539 #endif /* CONFIG_IEEE80211W */
1540
1541         /*
1542          * Remove the STA entry in order to make sure the STA PS state gets
1543          * cleared and configuration gets updated in case of reassociation back
1544          * to the same AP.
1545          */
1546         hostapd_sta_remove(hapd, sta->addr);
1547
1548 #ifdef CONFIG_IEEE80211N
1549         if (sta->flags & WLAN_STA_HT)
1550                 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
1551 #endif /* CONFIG_IEEE80211N */
1552
1553         if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid,
1554                             sta->capability, sta->supported_rates,
1555                             sta->supported_rates_len, sta->listen_interval,
1556                             sta->flags & WLAN_STA_HT ? &ht_cap : NULL))
1557         {
1558                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1559                                HOSTAPD_LEVEL_NOTICE,
1560                                "Could not add STA to kernel driver");
1561         }
1562
1563         if (sta->eapol_sm == NULL) {
1564                 /*
1565                  * This STA does not use RADIUS server for EAP authentication,
1566                  * so bind it to the selected VLAN interface now, since the
1567                  * interface selection is not going to change anymore.
1568                  */
1569                 ap_sta_bind_vlan(hapd, sta, 0);
1570         } else if (sta->vlan_id) {
1571                 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
1572                 ap_sta_bind_vlan(hapd, sta, 0);
1573         }
1574
1575         hapd->drv.set_sta_flags(hapd, sta);
1576
1577         if (sta->auth_alg == WLAN_AUTH_FT)
1578                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
1579         else
1580                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
1581         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
1582
1583         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
1584
1585  fail:
1586         /* Copy of the association request is not needed anymore */
1587         if (sta->last_assoc_req) {
1588                 os_free(sta->last_assoc_req);
1589                 sta->last_assoc_req = NULL;
1590         }
1591 }
1592
1593
1594 /**
1595  * ieee802_11_mgmt_cb - Process management frame TX status callback
1596  * @hapd: hostapd BSS data structure (the BSS from which the management frame
1597  * was sent from)
1598  * @buf: management frame data (starting from IEEE 802.11 header)
1599  * @len: length of frame data in octets
1600  * @stype: management frame subtype from frame control field
1601  * @ok: Whether the frame was ACK'ed
1602  */
1603 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
1604                         u16 stype, int ok)
1605 {
1606         const struct ieee80211_mgmt *mgmt;
1607         mgmt = (const struct ieee80211_mgmt *) buf;
1608
1609         switch (stype) {
1610         case WLAN_FC_STYPE_AUTH:
1611                 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
1612                 handle_auth_cb(hapd, mgmt, len, ok);
1613                 break;
1614         case WLAN_FC_STYPE_ASSOC_RESP:
1615                 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
1616                 handle_assoc_cb(hapd, mgmt, len, 0, ok);
1617                 break;
1618         case WLAN_FC_STYPE_REASSOC_RESP:
1619                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
1620                 handle_assoc_cb(hapd, mgmt, len, 1, ok);
1621                 break;
1622         case WLAN_FC_STYPE_PROBE_RESP:
1623                 wpa_printf(MSG_DEBUG, "mgmt::proberesp cb");
1624                 break;
1625         case WLAN_FC_STYPE_DEAUTH:
1626                 /* ignore */
1627                 break;
1628         case WLAN_FC_STYPE_ACTION:
1629                 wpa_printf(MSG_DEBUG, "mgmt::action cb");
1630                 break;
1631         default:
1632                 printf("unknown mgmt cb frame subtype %d\n", stype);
1633                 break;
1634         }
1635 }
1636
1637
1638 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1639 {
1640         /* TODO */
1641         return 0;
1642 }
1643
1644
1645 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1646                            char *buf, size_t buflen)
1647 {
1648         /* TODO */
1649         return 0;
1650 }
1651
1652
1653 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
1654                        const u8 *buf, size_t len, int ack)
1655 {
1656         struct sta_info *sta;
1657         struct hostapd_iface *iface = hapd->iface;
1658
1659         sta = ap_get_sta(hapd, addr);
1660         if (sta == NULL && iface->num_bss > 1) {
1661                 size_t j;
1662                 for (j = 0; j < iface->num_bss; j++) {
1663                         hapd = iface->bss[j];
1664                         sta = ap_get_sta(hapd, addr);
1665                         if (sta)
1666                                 break;
1667                 }
1668         }
1669         if (sta == NULL)
1670                 return;
1671         if (sta->flags & WLAN_STA_PENDING_POLL) {
1672                 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1673                            "activity poll", MAC2STR(sta->addr),
1674                            ack ? "ACKed" : "did not ACK");
1675                 if (ack)
1676                         sta->flags &= ~WLAN_STA_PENDING_POLL;
1677         }
1678
1679         ieee802_1x_tx_status(hapd, sta, buf, len, ack);
1680 }
1681
1682
1683 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
1684                                 int wds)
1685 {
1686         struct sta_info *sta;
1687
1688         sta = ap_get_sta(hapd, src);
1689         if (sta && (sta->flags & WLAN_STA_ASSOC)) {
1690                 if (wds && !(sta->flags & WLAN_STA_WDS)) {
1691                         wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
1692                                    "STA " MACSTR " (aid %u)",
1693                                    MAC2STR(sta->addr), sta->aid);
1694                         sta->flags |= WLAN_STA_WDS;
1695                         hostapd_set_wds_sta(hapd, sta->addr, sta->aid, 1);
1696                 }
1697                 return;
1698         }
1699
1700         wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
1701                    MACSTR, MAC2STR(src));
1702         if (sta && (sta->flags & WLAN_STA_AUTH))
1703                 hostapd_sta_disassoc(
1704                         hapd, src,
1705                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1706         else
1707                 hostapd_sta_deauth(
1708                         hapd, src,
1709                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1710 }
1711
1712
1713 #endif /* CONFIG_NATIVE_WINDOWS */