ieee802_11.c
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00001 /*
00002  * hostapd / IEEE 802.11 Management
00003  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
00004  *
00005  * This program is free software; you can redistribute it and/or modify
00006  * it under the terms of the GNU General Public License version 2 as
00007  * published by the Free Software Foundation.
00008  *
00009  * Alternatively, this software may be distributed under the terms of BSD
00010  * license.
00011  *
00012  * See README and COPYING for more details.
00013  */
00014 
00015 #include "utils/includes.h"
00016 
00017 #ifndef CONFIG_NATIVE_WINDOWS
00018 
00019 #include "utils/common.h"
00020 #include "utils/eloop.h"
00021 #include "crypto/crypto.h"
00022 #include "drivers/driver.h"
00023 #include "common/ieee802_11_defs.h"
00024 #include "common/ieee802_11_common.h"
00025 #include "common/wpa_ctrl.h"
00026 #include "radius/radius.h"
00027 #include "radius/radius_client.h"
00028 #include "hostapd.h"
00029 #include "beacon.h"
00030 #include "ieee802_11_auth.h"
00031 #include "sta_info.h"
00032 #include "ieee802_1x.h"
00033 #include "wpa_auth.h"
00034 #include "wmm.h"
00035 #include "ap_list.h"
00036 #include "accounting.h"
00037 #include "ap_config.h"
00038 #include "ap_mlme.h"
00039 #include "ieee802_11.h"
00040 
00041 
00042 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
00043 {
00044         u8 *pos = eid;
00045         int i, num, count;
00046 
00047         if (hapd->iface->current_rates == NULL)
00048                 return eid;
00049 
00050         *pos++ = WLAN_EID_SUPP_RATES;
00051         num = hapd->iface->num_rates;
00052         if (num > 8) {
00053                 /* rest of the rates are encoded in Extended supported
00054                  * rates element */
00055                 num = 8;
00056         }
00057 
00058         *pos++ = num;
00059         count = 0;
00060         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
00061              i++) {
00062                 count++;
00063                 *pos = hapd->iface->current_rates[i].rate / 5;
00064                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
00065                         *pos |= 0x80;
00066                 pos++;
00067         }
00068 
00069         return pos;
00070 }
00071 
00072 
00073 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
00074 {
00075         u8 *pos = eid;
00076         int i, num, count;
00077 
00078         if (hapd->iface->current_rates == NULL)
00079                 return eid;
00080 
00081         num = hapd->iface->num_rates;
00082         if (num <= 8)
00083                 return eid;
00084         num -= 8;
00085 
00086         *pos++ = WLAN_EID_EXT_SUPP_RATES;
00087         *pos++ = num;
00088         count = 0;
00089         for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
00090              i++) {
00091                 count++;
00092                 if (count <= 8)
00093                         continue; /* already in SuppRates IE */
00094                 *pos = hapd->iface->current_rates[i].rate / 5;
00095                 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
00096                         *pos |= 0x80;
00097                 pos++;
00098         }
00099 
00100         return pos;
00101 }
00102 
00103 
00104 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
00105                            int probe)
00106 {
00107         int capab = WLAN_CAPABILITY_ESS;
00108         int privacy;
00109 
00110         if (hapd->iface->num_sta_no_short_preamble == 0 &&
00111             hapd->iconf->preamble == SHORT_PREAMBLE)
00112                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
00113 
00114         privacy = hapd->conf->ssid.wep.keys_set;
00115 
00116         if (hapd->conf->ieee802_1x &&
00117             (hapd->conf->default_wep_key_len ||
00118              hapd->conf->individual_wep_key_len))
00119                 privacy = 1;
00120 
00121         if (hapd->conf->wpa)
00122                 privacy = 1;
00123 
00124         if (sta) {
00125                 int policy, def_klen;
00126                 if (probe && sta->ssid_probe) {
00127                         policy = sta->ssid_probe->security_policy;
00128                         def_klen = sta->ssid_probe->wep.default_len;
00129                 } else {
00130                         policy = sta->ssid->security_policy;
00131                         def_klen = sta->ssid->wep.default_len;
00132                 }
00133                 privacy = policy != SECURITY_PLAINTEXT;
00134                 if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
00135                         privacy = 0;
00136         }
00137 
00138         if (privacy)
00139                 capab |= WLAN_CAPABILITY_PRIVACY;
00140 
00141         if (hapd->iface->current_mode &&
00142             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
00143             hapd->iface->num_sta_no_short_slot_time == 0)
00144                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
00145 
00146         return capab;
00147 }
00148 
00149 
00150 #ifdef CONFIG_IEEE80211W
00151 static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
00152                                             struct sta_info *sta, u8 *eid)
00153 {
00154         u8 *pos = eid;
00155         u32 timeout, tu;
00156         struct os_time now, passed;
00157 
00158         *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
00159         *pos++ = 5;
00160         *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK;
00161         os_get_time(&now);
00162         os_time_sub(&now, &sta->sa_query_start, &passed);
00163         tu = (passed.sec * 1000000 + passed.usec) / 1024;
00164         if (hapd->conf->assoc_sa_query_max_timeout > tu)
00165                 timeout = hapd->conf->assoc_sa_query_max_timeout - tu;
00166         else
00167                 timeout = 0;
00168         if (timeout < hapd->conf->assoc_sa_query_max_timeout)
00169                 timeout++; /* add some extra time for local timers */
00170         WPA_PUT_LE32(pos, timeout);
00171         pos += 4;
00172 
00173         return pos;
00174 }
00175 #endif /* CONFIG_IEEE80211W */
00176 
00177 
00178 void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len)
00179 {
00180         int i;
00181         if (len > HOSTAPD_MAX_SSID_LEN)
00182                 len = HOSTAPD_MAX_SSID_LEN;
00183         for (i = 0; i < len; i++) {
00184                 if (ssid[i] >= 32 && ssid[i] < 127)
00185                         buf[i] = ssid[i];
00186                 else
00187                         buf[i] = '.';
00188         }
00189         buf[len] = '\0';
00190 }
00191 
00192 
00199 void ieee802_11_send_deauth(struct hostapd_data *hapd, const u8 *addr,
00200                             u16 reason)
00201 {
00202         struct ieee80211_mgmt mgmt;
00203 
00204         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
00205                        HOSTAPD_LEVEL_DEBUG,
00206                        "deauthenticate - reason %d", reason);
00207         os_memset(&mgmt, 0, sizeof(mgmt));
00208         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
00209                                           WLAN_FC_STYPE_DEAUTH);
00210         os_memcpy(mgmt.da, addr, ETH_ALEN);
00211         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
00212         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
00213         mgmt.u.deauth.reason_code = host_to_le16(reason);
00214         if (hapd->drv.send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
00215                                        sizeof(mgmt.u.deauth)) < 0)
00216                 perror("ieee802_11_send_deauth: send");
00217 }
00218 
00219 
00220 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
00221                            u16 auth_transaction, const u8 *challenge,
00222                            int iswep)
00223 {
00224         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00225                        HOSTAPD_LEVEL_DEBUG,
00226                        "authentication (shared key, transaction %d)",
00227                        auth_transaction);
00228 
00229         if (auth_transaction == 1) {
00230                 if (!sta->challenge) {
00231                         /* Generate a pseudo-random challenge */
00232                         u8 key[8];
00233                         time_t now;
00234                         int r;
00235                         sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
00236                         if (sta->challenge == NULL)
00237                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00238 
00239                         now = time(NULL);
00240                         r = random();
00241                         os_memcpy(key, &now, 4);
00242                         os_memcpy(key + 4, &r, 4);
00243                         rc4_skip(key, sizeof(key), 0,
00244                                  sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
00245                 }
00246                 return 0;
00247         }
00248 
00249         if (auth_transaction != 3)
00250                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00251 
00252         /* Transaction 3 */
00253         if (!iswep || !sta->challenge || !challenge ||
00254             os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
00255                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00256                                HOSTAPD_LEVEL_INFO,
00257                                "shared key authentication - invalid "
00258                                "challenge-response");
00259                 return WLAN_STATUS_CHALLENGE_FAIL;
00260         }
00261 
00262         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00263                        HOSTAPD_LEVEL_DEBUG,
00264                        "authentication OK (shared key)");
00265 #ifdef IEEE80211_REQUIRE_AUTH_ACK
00266         /* Station will be marked authenticated if it ACKs the
00267          * authentication reply. */
00268 #else
00269         sta->flags |= WLAN_STA_AUTH;
00270         wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
00271 #endif
00272         os_free(sta->challenge);
00273         sta->challenge = NULL;
00274 
00275         return 0;
00276 }
00277 
00278 
00279 static void send_auth_reply(struct hostapd_data *hapd,
00280                             const u8 *dst, const u8 *bssid,
00281                             u16 auth_alg, u16 auth_transaction, u16 resp,
00282                             const u8 *ies, size_t ies_len)
00283 {
00284         struct ieee80211_mgmt *reply;
00285         u8 *buf;
00286         size_t rlen;
00287 
00288         rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
00289         buf = os_zalloc(rlen);
00290         if (buf == NULL)
00291                 return;
00292 
00293         reply = (struct ieee80211_mgmt *) buf;
00294         reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
00295                                             WLAN_FC_STYPE_AUTH);
00296         os_memcpy(reply->da, dst, ETH_ALEN);
00297         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
00298         os_memcpy(reply->bssid, bssid, ETH_ALEN);
00299 
00300         reply->u.auth.auth_alg = host_to_le16(auth_alg);
00301         reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
00302         reply->u.auth.status_code = host_to_le16(resp);
00303 
00304         if (ies && ies_len)
00305                 os_memcpy(reply->u.auth.variable, ies, ies_len);
00306 
00307         wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
00308                    " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
00309                    MAC2STR(dst), auth_alg, auth_transaction,
00310                    resp, (unsigned long) ies_len);
00311         if (hapd->drv.send_mgmt_frame(hapd, reply, rlen) < 0)
00312                 perror("send_auth_reply: send");
00313 
00314         os_free(buf);
00315 }
00316 
00317 
00318 #ifdef CONFIG_IEEE80211R
00319 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
00320                                   u16 auth_transaction, u16 status,
00321                                   const u8 *ies, size_t ies_len)
00322 {
00323         struct hostapd_data *hapd = ctx;
00324         struct sta_info *sta;
00325 
00326         send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
00327                         status, ies, ies_len);
00328 
00329         if (status != WLAN_STATUS_SUCCESS)
00330                 return;
00331 
00332         sta = ap_get_sta(hapd, dst);
00333         if (sta == NULL)
00334                 return;
00335 
00336         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
00337                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
00338         sta->flags |= WLAN_STA_AUTH;
00339         mlme_authenticate_indication(hapd, sta);
00340 }
00341 #endif /* CONFIG_IEEE80211R */
00342 
00343 
00344 static void handle_auth(struct hostapd_data *hapd,
00345                         const struct ieee80211_mgmt *mgmt, size_t len)
00346 {
00347         u16 auth_alg, auth_transaction, status_code;
00348         u16 resp = WLAN_STATUS_SUCCESS;
00349         struct sta_info *sta = NULL;
00350         int res;
00351         u16 fc;
00352         const u8 *challenge = NULL;
00353         u32 session_timeout, acct_interim_interval;
00354         int vlan_id = 0;
00355         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
00356         size_t resp_ies_len = 0;
00357 
00358         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
00359                 printf("handle_auth - too short payload (len=%lu)\n",
00360                        (unsigned long) len);
00361                 return;
00362         }
00363 
00364         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
00365         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
00366         status_code = le_to_host16(mgmt->u.auth.status_code);
00367         fc = le_to_host16(mgmt->frame_control);
00368 
00369         if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
00370             2 + WLAN_AUTH_CHALLENGE_LEN &&
00371             mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
00372             mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
00373                 challenge = &mgmt->u.auth.variable[2];
00374 
00375         wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
00376                    "auth_transaction=%d status_code=%d wep=%d%s",
00377                    MAC2STR(mgmt->sa), auth_alg, auth_transaction,
00378                    status_code, !!(fc & WLAN_FC_ISWEP),
00379                    challenge ? " challenge" : "");
00380 
00381         if (hapd->tkip_countermeasures) {
00382                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
00383                 goto fail;
00384         }
00385 
00386         if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
00387                auth_alg == WLAN_AUTH_OPEN) ||
00388 #ifdef CONFIG_IEEE80211R
00389               (hapd->conf->wpa &&
00390                (hapd->conf->wpa_key_mgmt &
00391                 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
00392                auth_alg == WLAN_AUTH_FT) ||
00393 #endif /* CONFIG_IEEE80211R */
00394               ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
00395                auth_alg == WLAN_AUTH_SHARED_KEY))) {
00396                 printf("Unsupported authentication algorithm (%d)\n",
00397                        auth_alg);
00398                 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
00399                 goto fail;
00400         }
00401 
00402         if (!(auth_transaction == 1 ||
00403               (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
00404                 printf("Unknown authentication transaction number (%d)\n",
00405                        auth_transaction);
00406                 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
00407                 goto fail;
00408         }
00409 
00410         if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
00411                 printf("Station " MACSTR " not allowed to authenticate.\n",
00412                        MAC2STR(mgmt->sa));
00413                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
00414                 goto fail;
00415         }
00416 
00417         res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
00418                                       &session_timeout,
00419                                       &acct_interim_interval, &vlan_id);
00420         if (res == HOSTAPD_ACL_REJECT) {
00421                 printf("Station " MACSTR " not allowed to authenticate.\n",
00422                        MAC2STR(mgmt->sa));
00423                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
00424                 goto fail;
00425         }
00426         if (res == HOSTAPD_ACL_PENDING) {
00427                 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
00428                            " waiting for an external authentication",
00429                            MAC2STR(mgmt->sa));
00430                 /* Authentication code will re-send the authentication frame
00431                  * after it has received (and cached) information from the
00432                  * external source. */
00433                 return;
00434         }
00435 
00436         sta = ap_sta_add(hapd, mgmt->sa);
00437         if (!sta) {
00438                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
00439                 goto fail;
00440         }
00441 
00442         if (vlan_id > 0) {
00443                 if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
00444                                                vlan_id) == NULL) {
00445                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
00446                                        HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
00447                                        "%d received from RADIUS server",
00448                                        vlan_id);
00449                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
00450                         goto fail;
00451                 }
00452                 sta->vlan_id = vlan_id;
00453                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
00454                                HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
00455         }
00456 
00457         sta->flags &= ~WLAN_STA_PREAUTH;
00458         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
00459 
00460         if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
00461                 sta->acct_interim_interval = acct_interim_interval;
00462         if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
00463                 ap_sta_session_timeout(hapd, sta, session_timeout);
00464         else
00465                 ap_sta_no_session_timeout(hapd, sta);
00466 
00467         switch (auth_alg) {
00468         case WLAN_AUTH_OPEN:
00469                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00470                                HOSTAPD_LEVEL_DEBUG,
00471                                "authentication OK (open system)");
00472 #ifdef IEEE80211_REQUIRE_AUTH_ACK
00473                 /* Station will be marked authenticated if it ACKs the
00474                  * authentication reply. */
00475 #else
00476                 sta->flags |= WLAN_STA_AUTH;
00477                 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
00478                 sta->auth_alg = WLAN_AUTH_OPEN;
00479                 mlme_authenticate_indication(hapd, sta);
00480 #endif
00481                 break;
00482         case WLAN_AUTH_SHARED_KEY:
00483                 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
00484                                        fc & WLAN_FC_ISWEP);
00485                 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
00486                 mlme_authenticate_indication(hapd, sta);
00487                 if (sta->challenge && auth_transaction == 1) {
00488                         resp_ies[0] = WLAN_EID_CHALLENGE;
00489                         resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
00490                         os_memcpy(resp_ies + 2, sta->challenge,
00491                                   WLAN_AUTH_CHALLENGE_LEN);
00492                         resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
00493                 }
00494                 break;
00495 #ifdef CONFIG_IEEE80211R
00496         case WLAN_AUTH_FT:
00497                 sta->auth_alg = WLAN_AUTH_FT;
00498                 if (sta->wpa_sm == NULL)
00499                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
00500                                                         sta->addr);
00501                 if (sta->wpa_sm == NULL) {
00502                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
00503                                    "state machine");
00504                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
00505                         goto fail;
00506                 }
00507                 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
00508                                     auth_transaction, mgmt->u.auth.variable,
00509                                     len - IEEE80211_HDRLEN -
00510                                     sizeof(mgmt->u.auth),
00511                                     handle_auth_ft_finish, hapd);
00512                 /* handle_auth_ft_finish() callback will complete auth. */
00513                 return;
00514 #endif /* CONFIG_IEEE80211R */
00515         }
00516 
00517  fail:
00518         send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
00519                         auth_transaction + 1, resp, resp_ies, resp_ies_len);
00520 }
00521 
00522 
00523 static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
00524 {
00525         int i, j = 32, aid;
00526 
00527         /* get a unique AID */
00528         if (sta->aid > 0) {
00529                 wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
00530                 return 0;
00531         }
00532 
00533         for (i = 0; i < AID_WORDS; i++) {
00534                 if (hapd->sta_aid[i] == (u32) -1)
00535                         continue;
00536                 for (j = 0; j < 32; j++) {
00537                         if (!(hapd->sta_aid[i] & BIT(j)))
00538                                 break;
00539                 }
00540                 if (j < 32)
00541                         break;
00542         }
00543         if (j == 32)
00544                 return -1;
00545         aid = i * 32 + j + 1;
00546         if (aid > 2007)
00547                 return -1;
00548 
00549         sta->aid = aid;
00550         hapd->sta_aid[i] |= BIT(j);
00551         wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
00552         return 0;
00553 }
00554 
00555 
00556 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
00557                       const u8 *ssid_ie, size_t ssid_ie_len)
00558 {
00559         if (ssid_ie == NULL)
00560                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00561 
00562         if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
00563             os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
00564                 char ssid_txt[33];
00565                 ieee802_11_print_ssid(ssid_txt, ssid_ie, ssid_ie_len);
00566                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00567                                HOSTAPD_LEVEL_INFO,
00568                                "Station tried to associate with unknown SSID "
00569                                "'%s'", ssid_txt);
00570                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00571         }
00572 
00573         return WLAN_STATUS_SUCCESS;
00574 }
00575 
00576 
00577 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
00578                      const u8 *wmm_ie, size_t wmm_ie_len)
00579 {
00580         sta->flags &= ~WLAN_STA_WMM;
00581         if (wmm_ie && hapd->conf->wmm_enabled) {
00582                 if (hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len))
00583                         hostapd_logger(hapd, sta->addr,
00584                                        HOSTAPD_MODULE_WPA,
00585                                        HOSTAPD_LEVEL_DEBUG,
00586                                        "invalid WMM element in association "
00587                                        "request");
00588                 else
00589                         sta->flags |= WLAN_STA_WMM;
00590         }
00591         return WLAN_STATUS_SUCCESS;
00592 }
00593 
00594 
00595 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
00596                            struct ieee802_11_elems *elems)
00597 {
00598         if (!elems->supp_rates) {
00599                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00600                                HOSTAPD_LEVEL_DEBUG,
00601                                "No supported rates element in AssocReq");
00602                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00603         }
00604 
00605         if (elems->supp_rates_len > sizeof(sta->supported_rates)) {
00606                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00607                                HOSTAPD_LEVEL_DEBUG,
00608                                "Invalid supported rates element length %d",
00609                                elems->supp_rates_len);
00610                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00611         }
00612 
00613         os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
00614         os_memcpy(sta->supported_rates, elems->supp_rates,
00615                   elems->supp_rates_len);
00616         sta->supported_rates_len = elems->supp_rates_len;
00617 
00618         if (elems->ext_supp_rates) {
00619                 if (elems->supp_rates_len + elems->ext_supp_rates_len >
00620                     sizeof(sta->supported_rates)) {
00621                         hostapd_logger(hapd, sta->addr,
00622                                        HOSTAPD_MODULE_IEEE80211,
00623                                        HOSTAPD_LEVEL_DEBUG,
00624                                        "Invalid supported rates element length"
00625                                        " %d+%d", elems->supp_rates_len,
00626                                        elems->ext_supp_rates_len);
00627                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
00628                 }
00629 
00630                 os_memcpy(sta->supported_rates + elems->supp_rates_len,
00631                           elems->ext_supp_rates, elems->ext_supp_rates_len);
00632                 sta->supported_rates_len += elems->ext_supp_rates_len;
00633         }
00634 
00635         return WLAN_STATUS_SUCCESS;
00636 }
00637 
00638 
00639 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
00640                            const u8 *ies, size_t ies_len, int reassoc)
00641 {
00642         struct ieee802_11_elems elems;
00643         u16 resp;
00644         const u8 *wpa_ie;
00645         size_t wpa_ie_len;
00646 
00647         if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
00648                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00649                                HOSTAPD_LEVEL_INFO, "Station sent an invalid "
00650                                "association request");
00651                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00652         }
00653 
00654         resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
00655         if (resp != WLAN_STATUS_SUCCESS)
00656                 return resp;
00657         resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
00658         if (resp != WLAN_STATUS_SUCCESS)
00659                 return resp;
00660         resp = copy_supp_rates(hapd, sta, &elems);
00661         if (resp != WLAN_STATUS_SUCCESS)
00662                 return resp;
00663 #ifdef CONFIG_IEEE80211N
00664         resp = copy_sta_ht_capab(sta, elems.ht_capabilities,
00665                                  elems.ht_capabilities_len);
00666         if (resp != WLAN_STATUS_SUCCESS)
00667                 return resp;
00668 #endif /* CONFIG_IEEE80211N */
00669 
00670         if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
00671                 wpa_ie = elems.rsn_ie;
00672                 wpa_ie_len = elems.rsn_ie_len;
00673         } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
00674                    elems.wpa_ie) {
00675                 wpa_ie = elems.wpa_ie;
00676                 wpa_ie_len = elems.wpa_ie_len;
00677         } else {
00678                 wpa_ie = NULL;
00679                 wpa_ie_len = 0;
00680         }
00681 
00682 #ifdef CONFIG_WPS
00683         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
00684         if (hapd->conf->wps_state && elems.wps_ie) {
00685                 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
00686                            "Request - assume WPS is used");
00687                 sta->flags |= WLAN_STA_WPS;
00688                 wpabuf_free(sta->wps_ie);
00689                 sta->wps_ie = wpabuf_alloc_copy(elems.wps_ie + 4,
00690                                                 elems.wps_ie_len - 4);
00691                 wpa_ie = NULL;
00692                 wpa_ie_len = 0;
00693         } else if (hapd->conf->wps_state && wpa_ie == NULL) {
00694                 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
00695                            "(Re)Association Request - possible WPS use");
00696                 sta->flags |= WLAN_STA_MAYBE_WPS;
00697         } else
00698 #endif /* CONFIG_WPS */
00699         if (hapd->conf->wpa && wpa_ie == NULL) {
00700                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
00701                                HOSTAPD_LEVEL_INFO,
00702                                "No WPA/RSN IE in association request");
00703                 return WLAN_STATUS_INVALID_IE;
00704         }
00705 
00706         if (hapd->conf->wpa && wpa_ie) {
00707                 int res;
00708                 wpa_ie -= 2;
00709                 wpa_ie_len += 2;
00710                 if (sta->wpa_sm == NULL)
00711                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
00712                                                         sta->addr);
00713                 if (sta->wpa_sm == NULL) {
00714                         wpa_printf(MSG_WARNING, "Failed to initialize WPA "
00715                                    "state machine");
00716                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
00717                 }
00718                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
00719                                           wpa_ie, wpa_ie_len,
00720                                           elems.mdie, elems.mdie_len);
00721                 if (res == WPA_INVALID_GROUP)
00722                         resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
00723                 else if (res == WPA_INVALID_PAIRWISE)
00724                         resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
00725                 else if (res == WPA_INVALID_AKMP)
00726                         resp = WLAN_STATUS_AKMP_NOT_VALID;
00727                 else if (res == WPA_ALLOC_FAIL)
00728                         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
00729 #ifdef CONFIG_IEEE80211W
00730                 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
00731                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
00732                 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
00733                         resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
00734 #endif /* CONFIG_IEEE80211W */
00735                 else if (res == WPA_INVALID_MDIE)
00736                         resp = WLAN_STATUS_INVALID_MDIE;
00737                 else if (res != WPA_IE_OK)
00738                         resp = WLAN_STATUS_INVALID_IE;
00739                 if (resp != WLAN_STATUS_SUCCESS)
00740                         return resp;
00741 #ifdef CONFIG_IEEE80211W
00742                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
00743                     sta->sa_query_count > 0)
00744                         ap_check_sa_query_timeout(hapd, sta);
00745                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
00746                     (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
00747                         /*
00748                          * STA has already been associated with MFP and SA
00749                          * Query timeout has not been reached. Reject the
00750                          * association attempt temporarily and start SA Query,
00751                          * if one is not pending.
00752                          */
00753 
00754                         if (sta->sa_query_count == 0)
00755                                 ap_sta_start_sa_query(hapd, sta);
00756 
00757                         return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
00758                 }
00759 
00760                 if (wpa_auth_uses_mfp(sta->wpa_sm))
00761                         sta->flags |= WLAN_STA_MFP;
00762                 else
00763                         sta->flags &= ~WLAN_STA_MFP;
00764 #endif /* CONFIG_IEEE80211W */
00765 
00766 #ifdef CONFIG_IEEE80211R
00767                 if (sta->auth_alg == WLAN_AUTH_FT) {
00768                         if (!reassoc) {
00769                                 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
00770                                            "to use association (not "
00771                                            "re-association) with FT auth_alg",
00772                                            MAC2STR(sta->addr));
00773                                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00774                         }
00775 
00776                         resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
00777                                                        ies_len);
00778                         if (resp != WLAN_STATUS_SUCCESS)
00779                                 return resp;
00780                 }
00781 #endif /* CONFIG_IEEE80211R */
00782 
00783 #ifdef CONFIG_IEEE80211N
00784                 if ((sta->flags & WLAN_STA_HT) &&
00785                     wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
00786                         hostapd_logger(hapd, sta->addr,
00787                                        HOSTAPD_MODULE_IEEE80211,
00788                                        HOSTAPD_LEVEL_INFO,
00789                                        "Station tried to use TKIP with HT "
00790                                        "association");
00791                         return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
00792                 }
00793 #endif /* CONFIG_IEEE80211N */
00794         } else
00795                 wpa_auth_sta_no_wpa(sta->wpa_sm);
00796 
00797         return WLAN_STATUS_SUCCESS;
00798 }
00799 
00800 
00801 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
00802                         u16 reason_code)
00803 {
00804         int send_len;
00805         struct ieee80211_mgmt reply;
00806 
00807         os_memset(&reply, 0, sizeof(reply));
00808         reply.frame_control =
00809                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
00810         os_memcpy(reply.da, addr, ETH_ALEN);
00811         os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
00812         os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
00813 
00814         send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
00815         reply.u.deauth.reason_code = host_to_le16(reason_code);
00816 
00817         if (hapd->drv.send_mgmt_frame(hapd, &reply, send_len) < 0)
00818                 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
00819                            strerror(errno));
00820 }
00821 
00822 
00823 static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
00824                             u16 status_code, int reassoc, const u8 *ies,
00825                             size_t ies_len)
00826 {
00827         int send_len;
00828         u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
00829         struct ieee80211_mgmt *reply;
00830         u8 *p;
00831 
00832         os_memset(buf, 0, sizeof(buf));
00833         reply = (struct ieee80211_mgmt *) buf;
00834         reply->frame_control =
00835                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
00836                              (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
00837                               WLAN_FC_STYPE_ASSOC_RESP));
00838         os_memcpy(reply->da, sta->addr, ETH_ALEN);
00839         os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
00840         os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
00841 
00842         send_len = IEEE80211_HDRLEN;
00843         send_len += sizeof(reply->u.assoc_resp);
00844         reply->u.assoc_resp.capab_info =
00845                 host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
00846         reply->u.assoc_resp.status_code = host_to_le16(status_code);
00847         reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
00848                                                | BIT(14) | BIT(15));
00849         /* Supported rates */
00850         p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
00851         /* Extended supported rates */
00852         p = hostapd_eid_ext_supp_rates(hapd, p);
00853         if (sta->flags & WLAN_STA_WMM)
00854                 p = hostapd_eid_wmm(hapd, p);
00855 
00856 #ifdef CONFIG_IEEE80211N
00857         p = hostapd_eid_ht_capabilities(hapd, p);
00858         p = hostapd_eid_ht_operation(hapd, p);
00859 #endif /* CONFIG_IEEE80211N */
00860 
00861 #ifdef CONFIG_IEEE80211R
00862         if (status_code == WLAN_STATUS_SUCCESS) {
00863                 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
00864                  * Transition Information, RSN, [RIC Response] */
00865                 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
00866                                                 buf + sizeof(buf) - p,
00867                                                 sta->auth_alg, ies, ies_len);
00868         }
00869 #endif /* CONFIG_IEEE80211R */
00870 
00871 #ifdef CONFIG_IEEE80211W
00872         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
00873                 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
00874 #endif /* CONFIG_IEEE80211W */
00875 
00876         send_len += p - reply->u.assoc_resp.variable;
00877 
00878         if (hapd->drv.send_mgmt_frame(hapd, reply, send_len) < 0)
00879                 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
00880                            strerror(errno));
00881 }
00882 
00883 
00884 static void handle_assoc(struct hostapd_data *hapd,
00885                          const struct ieee80211_mgmt *mgmt, size_t len,
00886                          int reassoc)
00887 {
00888         u16 capab_info, listen_interval;
00889         u16 resp = WLAN_STATUS_SUCCESS;
00890         const u8 *pos;
00891         int left, i;
00892         struct sta_info *sta;
00893 
00894         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
00895                                       sizeof(mgmt->u.assoc_req))) {
00896                 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
00897                        "\n", reassoc, (unsigned long) len);
00898                 return;
00899         }
00900 
00901         if (reassoc) {
00902                 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
00903                 listen_interval = le_to_host16(
00904                         mgmt->u.reassoc_req.listen_interval);
00905                 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
00906                            " capab_info=0x%02x listen_interval=%d current_ap="
00907                            MACSTR,
00908                            MAC2STR(mgmt->sa), capab_info, listen_interval,
00909                            MAC2STR(mgmt->u.reassoc_req.current_ap));
00910                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
00911                 pos = mgmt->u.reassoc_req.variable;
00912         } else {
00913                 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
00914                 listen_interval = le_to_host16(
00915                         mgmt->u.assoc_req.listen_interval);
00916                 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
00917                            " capab_info=0x%02x listen_interval=%d",
00918                            MAC2STR(mgmt->sa), capab_info, listen_interval);
00919                 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
00920                 pos = mgmt->u.assoc_req.variable;
00921         }
00922 
00923         sta = ap_get_sta(hapd, mgmt->sa);
00924 #ifdef CONFIG_IEEE80211R
00925         if (sta && sta->auth_alg == WLAN_AUTH_FT &&
00926             (sta->flags & WLAN_STA_AUTH) == 0) {
00927                 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
00928                            "prior to authentication since it is using "
00929                            "over-the-DS FT", MAC2STR(mgmt->sa));
00930         } else
00931 #endif /* CONFIG_IEEE80211R */
00932         if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
00933                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
00934                                HOSTAPD_LEVEL_INFO, "Station tried to "
00935                                "associate before authentication "
00936                                "(aid=%d flags=0x%x)",
00937                                sta ? sta->aid : -1,
00938                                sta ? sta->flags : 0);
00939                 send_deauth(hapd, mgmt->sa,
00940                             WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
00941                 return;
00942         }
00943 
00944         if (hapd->tkip_countermeasures) {
00945                 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
00946                 goto fail;
00947         }
00948 
00949         if (listen_interval > hapd->conf->max_listen_interval) {
00950                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
00951                                HOSTAPD_LEVEL_DEBUG,
00952                                "Too large Listen Interval (%d)",
00953                                listen_interval);
00954                 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
00955                 goto fail;
00956         }
00957 
00958         /* followed by SSID and Supported rates; and HT capabilities if 802.11n
00959          * is used */
00960         resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
00961         if (resp != WLAN_STATUS_SUCCESS)
00962                 goto fail;
00963 
00964         if (hostapd_get_aid(hapd, sta) < 0) {
00965                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
00966                                HOSTAPD_LEVEL_INFO, "No room for more AIDs");
00967                 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
00968                 goto fail;
00969         }
00970 
00971         sta->capability = capab_info;
00972         sta->listen_interval = listen_interval;
00973 
00974         if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
00975                 sta->flags |= WLAN_STA_NONERP;
00976         for (i = 0; i < sta->supported_rates_len; i++) {
00977                 if ((sta->supported_rates[i] & 0x7f) > 22) {
00978                         sta->flags &= ~WLAN_STA_NONERP;
00979                         break;
00980                 }
00981         }
00982         if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
00983                 sta->nonerp_set = 1;
00984                 hapd->iface->num_sta_non_erp++;
00985                 if (hapd->iface->num_sta_non_erp == 1)
00986                         ieee802_11_set_beacons(hapd->iface);
00987         }
00988 
00989         if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
00990             !sta->no_short_slot_time_set) {
00991                 sta->no_short_slot_time_set = 1;
00992                 hapd->iface->num_sta_no_short_slot_time++;
00993                 if (hapd->iface->current_mode->mode ==
00994                     HOSTAPD_MODE_IEEE80211G &&
00995                     hapd->iface->num_sta_no_short_slot_time == 1)
00996                         ieee802_11_set_beacons(hapd->iface);
00997         }
00998 
00999         if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
01000                 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
01001         else
01002                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
01003 
01004         if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
01005             !sta->no_short_preamble_set) {
01006                 sta->no_short_preamble_set = 1;
01007                 hapd->iface->num_sta_no_short_preamble++;
01008                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
01009                     && hapd->iface->num_sta_no_short_preamble == 1)
01010                         ieee802_11_set_beacons(hapd->iface);
01011         }
01012 
01013 #ifdef CONFIG_IEEE80211N
01014         update_ht_state(hapd, sta);
01015 #endif /* CONFIG_IEEE80211N */
01016 
01017         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
01018                        HOSTAPD_LEVEL_DEBUG,
01019                        "association OK (aid %d)", sta->aid);
01020         /* Station will be marked associated, after it acknowledges AssocResp
01021          */
01022 
01023 #ifdef CONFIG_IEEE80211W
01024         if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
01025                 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
01026                            "SA Query procedure", reassoc ? "re" : "");
01027                 /* TODO: Send a protected Disassociate frame to the STA using
01028                  * the old key and Reason Code "Previous Authentication no
01029                  * longer valid". Make sure this is only sent protected since
01030                  * unprotected frame would be received by the STA that is now
01031                  * trying to associate.
01032                  */
01033         }
01034 #endif /* CONFIG_IEEE80211W */
01035 
01036         if (reassoc) {
01037                 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap,
01038                           ETH_ALEN);
01039         }
01040 
01041         if (sta->last_assoc_req)
01042                 os_free(sta->last_assoc_req);
01043         sta->last_assoc_req = os_malloc(len);
01044         if (sta->last_assoc_req)
01045                 os_memcpy(sta->last_assoc_req, mgmt, len);
01046 
01047         /* Make sure that the previously registered inactivity timer will not
01048          * remove the STA immediately. */
01049         sta->timeout_next = STA_NULLFUNC;
01050 
01051  fail:
01052         send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
01053 }
01054 
01055 
01056 static void handle_disassoc(struct hostapd_data *hapd,
01057                             const struct ieee80211_mgmt *mgmt, size_t len)
01058 {
01059         struct sta_info *sta;
01060 
01061         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
01062                 printf("handle_disassoc - too short payload (len=%lu)\n",
01063                        (unsigned long) len);
01064                 return;
01065         }
01066 
01067         wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
01068                    MAC2STR(mgmt->sa),
01069                    le_to_host16(mgmt->u.disassoc.reason_code));
01070 
01071         sta = ap_get_sta(hapd, mgmt->sa);
01072         if (sta == NULL) {
01073                 printf("Station " MACSTR " trying to disassociate, but it "
01074                        "is not associated.\n", MAC2STR(mgmt->sa));
01075                 return;
01076         }
01077 
01078         sta->flags &= ~WLAN_STA_ASSOC;
01079         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
01080                 MAC2STR(sta->addr));
01081         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
01082         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
01083                        HOSTAPD_LEVEL_INFO, "disassociated");
01084         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
01085         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
01086         /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
01087          * authenticated. */
01088         accounting_sta_stop(hapd, sta);
01089         ieee802_1x_free_station(sta);
01090         hapd->drv.sta_remove(hapd, sta->addr);
01091 
01092         if (sta->timeout_next == STA_NULLFUNC ||
01093             sta->timeout_next == STA_DISASSOC) {
01094                 sta->timeout_next = STA_DEAUTH;
01095                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
01096                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
01097                                        hapd, sta);
01098         }
01099 
01100         mlme_disassociate_indication(
01101                 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
01102 }
01103 
01104 
01105 static void handle_deauth(struct hostapd_data *hapd,
01106                           const struct ieee80211_mgmt *mgmt, size_t len)
01107 {
01108         struct sta_info *sta;
01109 
01110         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
01111                 printf("handle_deauth - too short payload (len=%lu)\n",
01112                        (unsigned long) len);
01113                 return;
01114         }
01115 
01116         wpa_printf(MSG_DEBUG, "deauthentication: STA=" MACSTR
01117                    " reason_code=%d",
01118                    MAC2STR(mgmt->sa),
01119                    le_to_host16(mgmt->u.deauth.reason_code));
01120 
01121         sta = ap_get_sta(hapd, mgmt->sa);
01122         if (sta == NULL) {
01123                 printf("Station " MACSTR " trying to deauthenticate, but it "
01124                        "is not authenticated.\n", MAC2STR(mgmt->sa));
01125                 return;
01126         }
01127 
01128         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
01129         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
01130                 MAC2STR(sta->addr));
01131         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
01132         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
01133                        HOSTAPD_LEVEL_DEBUG, "deauthenticated");
01134         mlme_deauthenticate_indication(
01135                 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
01136         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
01137         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
01138         ap_free_sta(hapd, sta);
01139 }
01140 
01141 
01142 static void handle_beacon(struct hostapd_data *hapd,
01143                           const struct ieee80211_mgmt *mgmt, size_t len,
01144                           struct hostapd_frame_info *fi)
01145 {
01146         struct ieee802_11_elems elems;
01147 
01148         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
01149                 printf("handle_beacon - too short payload (len=%lu)\n",
01150                        (unsigned long) len);
01151                 return;
01152         }
01153 
01154         (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
01155                                       len - (IEEE80211_HDRLEN +
01156                                              sizeof(mgmt->u.beacon)), &elems,
01157                                       0);
01158 
01159         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
01160 }
01161 
01162 
01163 #ifdef CONFIG_IEEE80211W
01164 
01165 /* MLME-SAQuery.request */
01166 void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
01167                                   const u8 *addr, const u8 *trans_id)
01168 {
01169         struct ieee80211_mgmt mgmt;
01170         u8 *end;
01171 
01172         wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to "
01173                    MACSTR, MAC2STR(addr));
01174         wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
01175                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
01176 
01177         os_memset(&mgmt, 0, sizeof(mgmt));
01178         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
01179                                           WLAN_FC_STYPE_ACTION);
01180         os_memcpy(mgmt.da, addr, ETH_ALEN);
01181         os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
01182         os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
01183         mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
01184         mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
01185         os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
01186                   WLAN_SA_QUERY_TR_ID_LEN);
01187         end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
01188         if (hapd->drv.send_mgmt_frame(hapd, &mgmt, end - (u8 *) &mgmt) < 0)
01189                 perror("ieee802_11_send_sa_query_req: send");
01190 }
01191 
01192 
01193 static void hostapd_sa_query_request(struct hostapd_data *hapd,
01194                                      const struct ieee80211_mgmt *mgmt)
01195 {
01196         struct sta_info *sta;
01197         struct ieee80211_mgmt resp;
01198         u8 *end;
01199 
01200         wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from "
01201                    MACSTR, MAC2STR(mgmt->sa));
01202         wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
01203                     mgmt->u.action.u.sa_query_resp.trans_id,
01204                     WLAN_SA_QUERY_TR_ID_LEN);
01205 
01206         sta = ap_get_sta(hapd, mgmt->sa);
01207         if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
01208                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request "
01209                            "from unassociated STA " MACSTR, MAC2STR(mgmt->sa));
01210                 return;
01211         }
01212 
01213         wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to "
01214                    MACSTR, MAC2STR(mgmt->sa));
01215 
01216         os_memset(&resp, 0, sizeof(resp));
01217         resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
01218                                           WLAN_FC_STYPE_ACTION);
01219         os_memcpy(resp.da, mgmt->sa, ETH_ALEN);
01220         os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN);
01221         os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN);
01222         resp.u.action.category = WLAN_ACTION_SA_QUERY;
01223         resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE;
01224         os_memcpy(resp.u.action.u.sa_query_req.trans_id,
01225                   mgmt->u.action.u.sa_query_req.trans_id,
01226                   WLAN_SA_QUERY_TR_ID_LEN);
01227         end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
01228         if (hapd->drv.send_mgmt_frame(hapd, &resp, end - (u8 *) &resp) < 0)
01229                 perror("hostapd_sa_query_request: send");
01230 }
01231 
01232 
01233 static void hostapd_sa_query_action(struct hostapd_data *hapd,
01234                                     const struct ieee80211_mgmt *mgmt,
01235                                     size_t len)
01236 {
01237         struct sta_info *sta;
01238         const u8 *end;
01239         int i;
01240 
01241         end = mgmt->u.action.u.sa_query_resp.trans_id +
01242                 WLAN_SA_QUERY_TR_ID_LEN;
01243         if (((u8 *) mgmt) + len < end) {
01244                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
01245                            "frame (len=%lu)", (unsigned long) len);
01246                 return;
01247         }
01248 
01249         if (mgmt->u.action.u.sa_query_resp.action == WLAN_SA_QUERY_REQUEST) {
01250                 hostapd_sa_query_request(hapd, mgmt);
01251                 return;
01252         }
01253 
01254         if (mgmt->u.action.u.sa_query_resp.action != WLAN_SA_QUERY_RESPONSE) {
01255                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query "
01256                            "Action %d", mgmt->u.action.u.sa_query_resp.action);
01257                 return;
01258         }
01259 
01260         wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from "
01261                    MACSTR, MAC2STR(mgmt->sa));
01262         wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
01263                     mgmt->u.action.u.sa_query_resp.trans_id,
01264                     WLAN_SA_QUERY_TR_ID_LEN);
01265 
01266         /* MLME-SAQuery.confirm */
01267 
01268         sta = ap_get_sta(hapd, mgmt->sa);
01269         if (sta == NULL || sta->sa_query_trans_id == NULL) {
01270                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
01271                            "pending SA Query request found");
01272                 return;
01273         }
01274 
01275         for (i = 0; i < sta->sa_query_count; i++) {
01276                 if (os_memcmp(sta->sa_query_trans_id +
01277                               i * WLAN_SA_QUERY_TR_ID_LEN,
01278                               mgmt->u.action.u.sa_query_resp.trans_id,
01279                               WLAN_SA_QUERY_TR_ID_LEN) == 0)
01280                         break;
01281         }
01282 
01283         if (i >= sta->sa_query_count) {
01284                 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query "
01285                            "transaction identifier found");
01286                 return;
01287         }
01288 
01289         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
01290                        HOSTAPD_LEVEL_DEBUG,
01291                        "Reply to pending SA Query received");
01292         ap_sta_stop_sa_query(hapd, sta);
01293 }
01294 
01295 
01296 static int robust_action_frame(u8 category)
01297 {
01298         return category != WLAN_ACTION_PUBLIC &&
01299                 category != WLAN_ACTION_HT;
01300 }
01301 #endif /* CONFIG_IEEE80211W */
01302 
01303 
01304 static void handle_action(struct hostapd_data *hapd,
01305                           const struct ieee80211_mgmt *mgmt, size_t len)
01306 {
01307         struct sta_info *sta;
01308 
01309         if (len < IEEE80211_HDRLEN + 1) {
01310                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
01311                                HOSTAPD_LEVEL_DEBUG,
01312                                "handle_action - too short payload (len=%lu)",
01313                                (unsigned long) len);
01314                 return;
01315         }
01316 
01317         sta = ap_get_sta(hapd, mgmt->sa);
01318 #ifdef CONFIG_IEEE80211W
01319         if (sta && (sta->flags & WLAN_STA_MFP) &&
01320             !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP) &&
01321               robust_action_frame(mgmt->u.action.category))) {
01322                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
01323                                HOSTAPD_LEVEL_DEBUG,
01324                                "Dropped unprotected Robust Action frame from "
01325                                "an MFP STA");
01326                 return;
01327         }
01328 #endif /* CONFIG_IEEE80211W */
01329 
01330         switch (mgmt->u.action.category) {
01331 #ifdef CONFIG_IEEE80211R
01332         case WLAN_ACTION_FT:
01333         {
01334                 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
01335                         wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action "
01336                                    "frame from unassociated STA " MACSTR,
01337                                    MAC2STR(mgmt->sa));
01338                         return;
01339                 }
01340 
01341                 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
01342                                      len - IEEE80211_HDRLEN))
01343                         break;
01344 
01345                 return;
01346         }
01347 #endif /* CONFIG_IEEE80211R */
01348         case WLAN_ACTION_WMM:
01349                 hostapd_wmm_action(hapd, mgmt, len);
01350                 return;
01351 #ifdef CONFIG_IEEE80211W
01352         case WLAN_ACTION_SA_QUERY:
01353                 hostapd_sa_query_action(hapd, mgmt, len);
01354                 return;
01355 #endif /* CONFIG_IEEE80211W */
01356         case WLAN_ACTION_PUBLIC:
01357                 if (hapd->public_action_cb) {
01358                         hapd->public_action_cb(hapd->public_action_cb_ctx,
01359                                                (u8 *) mgmt, len,
01360                                                hapd->iface->freq);
01361                         return;
01362                 }
01363                 break;
01364         }
01365 
01366         hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
01367                        HOSTAPD_LEVEL_DEBUG,
01368                        "handle_action - unknown action category %d or invalid "
01369                        "frame",
01370                        mgmt->u.action.category);
01371         if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
01372             !(mgmt->sa[0] & 0x01)) {
01373                 struct ieee80211_mgmt *resp;
01374 
01375                 /*
01376                  * IEEE 802.11-REVma/D9.0 - 7.3.1.11
01377                  * Return the Action frame to the source without change
01378                  * except that MSB of the Category set to 1.
01379                  */
01380                 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
01381                            "frame back to sender");
01382                 resp = os_malloc(len);
01383                 if (resp == NULL)
01384                         return;
01385                 os_memcpy(resp, mgmt, len);
01386                 os_memcpy(resp->da, resp->sa, ETH_ALEN);
01387                 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
01388                 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
01389                 resp->u.action.category |= 0x80;
01390 
01391                 hapd->drv.send_mgmt_frame(hapd, resp, len);
01392                 os_free(resp);
01393         }
01394 }
01395 
01396 
01410 void ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
01411                      struct hostapd_frame_info *fi)
01412 {
01413         struct ieee80211_mgmt *mgmt;
01414         int broadcast;
01415         u16 fc, stype;
01416 
01417         mgmt = (struct ieee80211_mgmt *) buf;
01418         fc = le_to_host16(mgmt->frame_control);
01419         stype = WLAN_FC_GET_STYPE(fc);
01420 
01421         if (stype == WLAN_FC_STYPE_BEACON) {
01422                 handle_beacon(hapd, mgmt, len, fi);
01423                 return;
01424         }
01425 
01426         broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
01427                 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
01428                 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
01429 
01430         if (!broadcast &&
01431             os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
01432                 printf("MGMT: BSSID=" MACSTR " not our address\n",
01433                        MAC2STR(mgmt->bssid));
01434                 return;
01435         }
01436 
01437 
01438         if (stype == WLAN_FC_STYPE_PROBE_REQ) {
01439                 handle_probe_req(hapd, mgmt, len);
01440                 return;
01441         }
01442 
01443         if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
01444                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
01445                                HOSTAPD_LEVEL_DEBUG,
01446                                "MGMT: DA=" MACSTR " not our address",
01447                                MAC2STR(mgmt->da));
01448                 return;
01449         }
01450 
01451         switch (stype) {
01452         case WLAN_FC_STYPE_AUTH:
01453                 wpa_printf(MSG_DEBUG, "mgmt::auth");
01454                 handle_auth(hapd, mgmt, len);
01455                 break;
01456         case WLAN_FC_STYPE_ASSOC_REQ:
01457                 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
01458                 handle_assoc(hapd, mgmt, len, 0);
01459                 break;
01460         case WLAN_FC_STYPE_REASSOC_REQ:
01461                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
01462                 handle_assoc(hapd, mgmt, len, 1);
01463                 break;
01464         case WLAN_FC_STYPE_DISASSOC:
01465                 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
01466                 handle_disassoc(hapd, mgmt, len);
01467                 break;
01468         case WLAN_FC_STYPE_DEAUTH:
01469                 wpa_printf(MSG_DEBUG, "mgmt::deauth");
01470                 handle_deauth(hapd, mgmt, len);
01471                 break;
01472         case WLAN_FC_STYPE_ACTION:
01473                 wpa_printf(MSG_DEBUG, "mgmt::action");
01474                 handle_action(hapd, mgmt, len);
01475                 break;
01476         default:
01477                 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
01478                                HOSTAPD_LEVEL_DEBUG,
01479                                "unknown mgmt frame subtype %d", stype);
01480                 break;
01481         }
01482 }
01483 
01484 
01485 static void handle_auth_cb(struct hostapd_data *hapd,
01486                            const struct ieee80211_mgmt *mgmt,
01487                            size_t len, int ok)
01488 {
01489         u16 auth_alg, auth_transaction, status_code;
01490         struct sta_info *sta;
01491 
01492         if (!ok) {
01493                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
01494                                HOSTAPD_LEVEL_NOTICE,
01495                                "did not acknowledge authentication response");
01496                 return;
01497         }
01498 
01499         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
01500                 printf("handle_auth_cb - too short payload (len=%lu)\n",
01501                        (unsigned long) len);
01502                 return;
01503         }
01504 
01505         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
01506         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
01507         status_code = le_to_host16(mgmt->u.auth.status_code);
01508 
01509         sta = ap_get_sta(hapd, mgmt->da);
01510         if (!sta) {
01511                 printf("handle_auth_cb: STA " MACSTR " not found\n",
01512                        MAC2STR(mgmt->da));
01513                 return;
01514         }
01515 
01516         if (status_code == WLAN_STATUS_SUCCESS &&
01517             ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
01518              (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
01519                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
01520                                HOSTAPD_LEVEL_INFO, "authenticated");
01521                 sta->flags |= WLAN_STA_AUTH;
01522         }
01523 }
01524 
01525 
01526 static void handle_assoc_cb(struct hostapd_data *hapd,
01527                             const struct ieee80211_mgmt *mgmt,
01528                             size_t len, int reassoc, int ok)
01529 {
01530         u16 status;
01531         struct sta_info *sta;
01532         int new_assoc = 1;
01533         struct ieee80211_ht_capabilities ht_cap;
01534 
01535         if (!ok) {
01536                 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
01537                                HOSTAPD_LEVEL_DEBUG,
01538                                "did not acknowledge association response");
01539                 return;
01540         }
01541 
01542         if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
01543                                       sizeof(mgmt->u.assoc_resp))) {
01544                 printf("handle_assoc_cb(reassoc=%d) - too short payload "
01545                        "(len=%lu)\n", reassoc, (unsigned long) len);
01546                 return;
01547         }
01548 
01549         if (reassoc)
01550                 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
01551         else
01552                 status = le_to_host16(mgmt->u.assoc_resp.status_code);
01553 
01554         sta = ap_get_sta(hapd, mgmt->da);
01555         if (!sta) {
01556                 printf("handle_assoc_cb: STA " MACSTR " not found\n",
01557                        MAC2STR(mgmt->da));
01558                 return;
01559         }
01560 
01561         if (status != WLAN_STATUS_SUCCESS)
01562                 goto fail;
01563 
01564         /* Stop previous accounting session, if one is started, and allocate
01565          * new session id for the new session. */
01566         accounting_sta_stop(hapd, sta);
01567 
01568         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
01569                        HOSTAPD_LEVEL_INFO,
01570                        "associated (aid %d)",
01571                        sta->aid);
01572 
01573         if (sta->flags & WLAN_STA_ASSOC)
01574                 new_assoc = 0;
01575         sta->flags |= WLAN_STA_ASSOC;
01576         if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) ||
01577             sta->auth_alg == WLAN_AUTH_FT) {
01578                 /*
01579                  * Open, static WEP, or FT protocol; no separate authorization
01580                  * step.
01581                  */
01582                 sta->flags |= WLAN_STA_AUTHORIZED;
01583                 wpa_msg(hapd->msg_ctx, MSG_INFO,
01584                         AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
01585         }
01586 
01587         if (reassoc)
01588                 mlme_reassociate_indication(hapd, sta);
01589         else
01590                 mlme_associate_indication(hapd, sta);
01591 
01592 #ifdef CONFIG_IEEE80211W
01593         sta->sa_query_timed_out = 0;
01594 #endif /* CONFIG_IEEE80211W */
01595 
01596         /*
01597          * Remove the STA entry in order to make sure the STA PS state gets
01598          * cleared and configuration gets updated in case of reassociation back
01599          * to the same AP.
01600          */
01601         hapd->drv.sta_remove(hapd, sta->addr);
01602 
01603 #ifdef CONFIG_IEEE80211N
01604         if (sta->flags & WLAN_STA_HT)
01605                 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
01606 #endif /* CONFIG_IEEE80211N */
01607 
01608         if (hapd->drv.sta_add(hapd, sta->addr, sta->aid, sta->capability,
01609                               sta->supported_rates, sta->supported_rates_len,
01610                               sta->listen_interval,
01611                               sta->flags & WLAN_STA_HT ? &ht_cap : NULL)) {
01612                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
01613                                HOSTAPD_LEVEL_NOTICE,
01614                                "Could not add STA to kernel driver");
01615         }
01616 
01617         if (sta->eapol_sm == NULL) {
01618                 /*
01619                  * This STA does not use RADIUS server for EAP authentication,
01620                  * so bind it to the selected VLAN interface now, since the
01621                  * interface selection is not going to change anymore.
01622                  */
01623                 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
01624                         goto fail;
01625         } else if (sta->vlan_id) {
01626                 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
01627                 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
01628                         goto fail;
01629         }
01630 
01631         hapd->drv.set_sta_flags(hapd, sta);
01632 
01633         if (sta->auth_alg == WLAN_AUTH_FT)
01634                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
01635         else
01636                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
01637         hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
01638 
01639         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
01640 
01641  fail:
01642         /* Copy of the association request is not needed anymore */
01643         if (sta->last_assoc_req) {
01644                 os_free(sta->last_assoc_req);
01645                 sta->last_assoc_req = NULL;
01646         }
01647 }
01648 
01649 
01659 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
01660                         u16 stype, int ok)
01661 {
01662         const struct ieee80211_mgmt *mgmt;
01663         mgmt = (const struct ieee80211_mgmt *) buf;
01664 
01665         switch (stype) {
01666         case WLAN_FC_STYPE_AUTH:
01667                 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
01668                 handle_auth_cb(hapd, mgmt, len, ok);
01669                 break;
01670         case WLAN_FC_STYPE_ASSOC_RESP:
01671                 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
01672                 handle_assoc_cb(hapd, mgmt, len, 0, ok);
01673                 break;
01674         case WLAN_FC_STYPE_REASSOC_RESP:
01675                 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
01676                 handle_assoc_cb(hapd, mgmt, len, 1, ok);
01677                 break;
01678         case WLAN_FC_STYPE_PROBE_RESP:
01679                 wpa_printf(MSG_DEBUG, "mgmt::proberesp cb");
01680                 break;
01681         case WLAN_FC_STYPE_DEAUTH:
01682                 /* ignore */
01683                 break;
01684         case WLAN_FC_STYPE_ACTION:
01685                 wpa_printf(MSG_DEBUG, "mgmt::action cb");
01686                 break;
01687         default:
01688                 printf("unknown mgmt cb frame subtype %d\n", stype);
01689                 break;
01690         }
01691 }
01692 
01693 
01694 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
01695 {
01696         /* TODO */
01697         return 0;
01698 }
01699 
01700 
01701 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
01702                            char *buf, size_t buflen)
01703 {
01704         /* TODO */
01705         return 0;
01706 }
01707 
01708 
01709 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
01710                        const u8 *buf, size_t len, int ack)
01711 {
01712         struct sta_info *sta;
01713         struct hostapd_iface *iface = hapd->iface;
01714 
01715         sta = ap_get_sta(hapd, addr);
01716         if (sta == NULL && iface->num_bss > 1) {
01717                 size_t j;
01718                 for (j = 0; j < iface->num_bss; j++) {
01719                         hapd = iface->bss[j];
01720                         sta = ap_get_sta(hapd, addr);
01721                         if (sta)
01722                                 break;
01723                 }
01724         }
01725         if (sta == NULL)
01726                 return;
01727         if (sta->flags & WLAN_STA_PENDING_POLL) {
01728                 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
01729                            "activity poll", MAC2STR(sta->addr),
01730                            ack ? "ACKed" : "did not ACK");
01731                 if (ack)
01732                         sta->flags &= ~WLAN_STA_PENDING_POLL;
01733         }
01734 
01735         ieee802_1x_tx_status(hapd, sta, buf, len, ack);
01736 }
01737 
01738 
01739 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
01740                                 int wds)
01741 {
01742         struct sta_info *sta;
01743 
01744         sta = ap_get_sta(hapd, src);
01745         if (sta && (sta->flags & WLAN_STA_ASSOC)) {
01746                 if (wds && !(sta->flags & WLAN_STA_WDS)) {
01747                         wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
01748                                    "STA " MACSTR " (aid %u)",
01749                                    MAC2STR(sta->addr), sta->aid);
01750                         sta->flags |= WLAN_STA_WDS;
01751                         hapd->drv.set_wds_sta(hapd, sta->addr, sta->aid, 1);
01752                 }
01753                 return;
01754         }
01755 
01756         wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
01757                    MACSTR, MAC2STR(src));
01758         if (sta && (sta->flags & WLAN_STA_AUTH))
01759                 hapd->drv.sta_disassoc(
01760                         hapd, src,
01761                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
01762         else
01763                 hapd->drv.sta_deauth(
01764                         hapd, src,
01765                         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
01766 }
01767 
01768 
01769 #endif /* CONFIG_NATIVE_WINDOWS */


wpa_supplicant_node
Author(s): Package maintained by Blaise Gassend
autogenerated on Thu Apr 24 2014 15:33:20