/* * hostapd / IEEE 802.11 Management * Copyright (c) 2002-2010, Jouni Malinen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Alternatively, this software may be distributed under the terms of BSD * license. * * See README and COPYING for more details. */ #include "utils/includes.h" #ifndef CONFIG_NATIVE_WINDOWS #include "utils/common.h" #include "utils/eloop.h" #include "crypto/crypto.h" #include "drivers/driver.h" #include "common/ieee802_11_defs.h" #include "common/ieee802_11_common.h" #include "common/wpa_ctrl.h" #include "radius/radius.h" #include "radius/radius_client.h" #include "hostapd.h" #include "beacon.h" #include "ieee802_11_auth.h" #include "sta_info.h" #include "ieee802_1x.h" #include "wpa_auth.h" #include "wmm.h" #include "ap_list.h" #include "accounting.h" #include "ap_config.h" #include "ap_mlme.h" #include "ieee802_11.h" u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid) { u8 *pos = eid; int i, num, count; if (hapd->iface->current_rates == NULL) return eid; *pos++ = WLAN_EID_SUPP_RATES; num = hapd->iface->num_rates; if (num > 8) { /* rest of the rates are encoded in Extended supported * rates element */ num = 8; } *pos++ = num; count = 0; for (i = 0, count = 0; i < hapd->iface->num_rates && count < num; i++) { count++; *pos = hapd->iface->current_rates[i].rate / 5; if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) *pos |= 0x80; pos++; } return pos; } u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid) { u8 *pos = eid; int i, num, count; if (hapd->iface->current_rates == NULL) return eid; num = hapd->iface->num_rates; if (num <= 8) return eid; num -= 8; *pos++ = WLAN_EID_EXT_SUPP_RATES; *pos++ = num; count = 0; for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8; i++) { count++; if (count <= 8) continue; /* already in SuppRates IE */ *pos = hapd->iface->current_rates[i].rate / 5; if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) *pos |= 0x80; pos++; } return pos; } u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta, int probe) { int capab = WLAN_CAPABILITY_ESS; int privacy; if (hapd->iface->num_sta_no_short_preamble == 0 && hapd->iconf->preamble == SHORT_PREAMBLE) capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; privacy = hapd->conf->ssid.wep.keys_set; if (hapd->conf->ieee802_1x && (hapd->conf->default_wep_key_len || hapd->conf->individual_wep_key_len)) privacy = 1; if (hapd->conf->wpa) privacy = 1; if (sta) { int policy, def_klen; if (probe && sta->ssid_probe) { policy = sta->ssid_probe->security_policy; def_klen = sta->ssid_probe->wep.default_len; } else { policy = sta->ssid->security_policy; def_klen = sta->ssid->wep.default_len; } privacy = policy != SECURITY_PLAINTEXT; if (policy == SECURITY_IEEE_802_1X && def_klen == 0) privacy = 0; } if (privacy) capab |= WLAN_CAPABILITY_PRIVACY; if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->iface->num_sta_no_short_slot_time == 0) capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; return capab; } #ifdef CONFIG_IEEE80211W static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd, struct sta_info *sta, u8 *eid) { u8 *pos = eid; u32 timeout, tu; struct os_time now, passed; *pos++ = WLAN_EID_TIMEOUT_INTERVAL; *pos++ = 5; *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK; os_get_time(&now); os_time_sub(&now, &sta->sa_query_start, &passed); tu = (passed.sec * 1000000 + passed.usec) / 1024; if (hapd->conf->assoc_sa_query_max_timeout > tu) timeout = hapd->conf->assoc_sa_query_max_timeout - tu; else timeout = 0; if (timeout < hapd->conf->assoc_sa_query_max_timeout) timeout++; /* add some extra time for local timers */ WPA_PUT_LE32(pos, timeout); pos += 4; return pos; } #endif /* CONFIG_IEEE80211W */ void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len) { int i; if (len > HOSTAPD_MAX_SSID_LEN) len = HOSTAPD_MAX_SSID_LEN; for (i = 0; i < len; i++) { if (ssid[i] >= 32 && ssid[i] < 127) buf[i] = ssid[i]; else buf[i] = '.'; } buf[len] = '\0'; } /** * ieee802_11_send_deauth - Send Deauthentication frame * @hapd: hostapd BSS data * @addr: Address of the destination STA * @reason: Reason code for Deauthentication */ void ieee802_11_send_deauth(struct hostapd_data *hapd, const u8 *addr, u16 reason) { struct ieee80211_mgmt mgmt; hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "deauthenticate - reason %d", reason); os_memset(&mgmt, 0, sizeof(mgmt)); mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); os_memcpy(mgmt.da, addr, ETH_ALEN); os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN); os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN); mgmt.u.deauth.reason_code = host_to_le16(reason); if (hapd->drv.send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN + sizeof(mgmt.u.deauth)) < 0) perror("ieee802_11_send_deauth: send"); } static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta, u16 auth_transaction, const u8 *challenge, int iswep) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication (shared key, transaction %d)", auth_transaction); if (auth_transaction == 1) { if (!sta->challenge) { /* Generate a pseudo-random challenge */ u8 key[8]; time_t now; int r; sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN); if (sta->challenge == NULL) return WLAN_STATUS_UNSPECIFIED_FAILURE; now = time(NULL); r = random(); os_memcpy(key, &now, 4); os_memcpy(key + 4, &r, 4); rc4_skip(key, sizeof(key), 0, sta->challenge, WLAN_AUTH_CHALLENGE_LEN); } return 0; } if (auth_transaction != 3) return WLAN_STATUS_UNSPECIFIED_FAILURE; /* Transaction 3 */ if (!iswep || !sta->challenge || !challenge || os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "shared key authentication - invalid " "challenge-response"); return WLAN_STATUS_CHALLENGE_FAIL; } hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication OK (shared key)"); #ifdef IEEE80211_REQUIRE_AUTH_ACK /* Station will be marked authenticated if it ACKs the * authentication reply. */ #else sta->flags |= WLAN_STA_AUTH; wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); #endif os_free(sta->challenge); sta->challenge = NULL; return 0; } static void send_auth_reply(struct hostapd_data *hapd, const u8 *dst, const u8 *bssid, u16 auth_alg, u16 auth_transaction, u16 resp, const u8 *ies, size_t ies_len) { struct ieee80211_mgmt *reply; u8 *buf; size_t rlen; rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len; buf = os_zalloc(rlen); if (buf == NULL) return; reply = (struct ieee80211_mgmt *) buf; reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_AUTH); os_memcpy(reply->da, dst, ETH_ALEN); os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); os_memcpy(reply->bssid, bssid, ETH_ALEN); reply->u.auth.auth_alg = host_to_le16(auth_alg); reply->u.auth.auth_transaction = host_to_le16(auth_transaction); reply->u.auth.status_code = host_to_le16(resp); if (ies && ies_len) os_memcpy(reply->u.auth.variable, ies, ies_len); wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)", MAC2STR(dst), auth_alg, auth_transaction, resp, (unsigned long) ies_len); if (hapd->drv.send_mgmt_frame(hapd, reply, rlen) < 0) perror("send_auth_reply: send"); os_free(buf); } #ifdef CONFIG_IEEE80211R static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid, u16 auth_transaction, u16 status, const u8 *ies, size_t ies_len) { struct hostapd_data *hapd = ctx; struct sta_info *sta; send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction, status, ies, ies_len); if (status != WLAN_STATUS_SUCCESS) return; sta = ap_get_sta(hapd, dst); if (sta == NULL) return; hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); sta->flags |= WLAN_STA_AUTH; mlme_authenticate_indication(hapd, sta); } #endif /* CONFIG_IEEE80211R */ static void handle_auth(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len) { u16 auth_alg, auth_transaction, status_code; u16 resp = WLAN_STATUS_SUCCESS; struct sta_info *sta = NULL; int res; u16 fc; const u8 *challenge = NULL; u32 session_timeout, acct_interim_interval; int vlan_id = 0; u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; size_t resp_ies_len = 0; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { printf("handle_auth - too short payload (len=%lu)\n", (unsigned long) len); return; } auth_alg = le_to_host16(mgmt->u.auth.auth_alg); auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); status_code = le_to_host16(mgmt->u.auth.status_code); fc = le_to_host16(mgmt->frame_control); if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 2 + WLAN_AUTH_CHALLENGE_LEN && mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) challenge = &mgmt->u.auth.variable[2]; wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " "auth_transaction=%d status_code=%d wep=%d%s", MAC2STR(mgmt->sa), auth_alg, auth_transaction, status_code, !!(fc & WLAN_FC_ISWEP), challenge ? " challenge" : ""); if (hapd->tkip_countermeasures) { resp = WLAN_REASON_MICHAEL_MIC_FAILURE; goto fail; } if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && auth_alg == WLAN_AUTH_OPEN) || #ifdef CONFIG_IEEE80211R (hapd->conf->wpa && (hapd->conf->wpa_key_mgmt & (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) && auth_alg == WLAN_AUTH_FT) || #endif /* CONFIG_IEEE80211R */ ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && auth_alg == WLAN_AUTH_SHARED_KEY))) { printf("Unsupported authentication algorithm (%d)\n", auth_alg); resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; goto fail; } if (!(auth_transaction == 1 || (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { printf("Unknown authentication transaction number (%d)\n", auth_transaction); resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; goto fail; } if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { printf("Station " MACSTR " not allowed to authenticate.\n", MAC2STR(mgmt->sa)); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len, &session_timeout, &acct_interim_interval, &vlan_id); if (res == HOSTAPD_ACL_REJECT) { printf("Station " MACSTR " not allowed to authenticate.\n", MAC2STR(mgmt->sa)); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (res == HOSTAPD_ACL_PENDING) { wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR " waiting for an external authentication", MAC2STR(mgmt->sa)); /* Authentication code will re-send the authentication frame * after it has received (and cached) information from the * external source. */ return; } sta = ap_sta_add(hapd, mgmt->sa); if (!sta) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (vlan_id > 0) { if (hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id) == NULL) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, HOSTAPD_LEVEL_INFO, "Invalid VLAN ID " "%d received from RADIUS server", vlan_id); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } sta->vlan_id = vlan_id; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); } sta->flags &= ~WLAN_STA_PREAUTH; ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) sta->acct_interim_interval = acct_interim_interval; if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) ap_sta_session_timeout(hapd, sta, session_timeout); else ap_sta_no_session_timeout(hapd, sta); switch (auth_alg) { case WLAN_AUTH_OPEN: hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication OK (open system)"); #ifdef IEEE80211_REQUIRE_AUTH_ACK /* Station will be marked authenticated if it ACKs the * authentication reply. */ #else sta->flags |= WLAN_STA_AUTH; wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); sta->auth_alg = WLAN_AUTH_OPEN; mlme_authenticate_indication(hapd, sta); #endif break; case WLAN_AUTH_SHARED_KEY: resp = auth_shared_key(hapd, sta, auth_transaction, challenge, fc & WLAN_FC_ISWEP); sta->auth_alg = WLAN_AUTH_SHARED_KEY; mlme_authenticate_indication(hapd, sta); if (sta->challenge && auth_transaction == 1) { resp_ies[0] = WLAN_EID_CHALLENGE; resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; os_memcpy(resp_ies + 2, sta->challenge, WLAN_AUTH_CHALLENGE_LEN); resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; } break; #ifdef CONFIG_IEEE80211R case WLAN_AUTH_FT: sta->auth_alg = WLAN_AUTH_FT; if (sta->wpa_sm == NULL) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr); if (sta->wpa_sm == NULL) { wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " "state machine"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, auth_transaction, mgmt->u.auth.variable, len - IEEE80211_HDRLEN - sizeof(mgmt->u.auth), handle_auth_ft_finish, hapd); /* handle_auth_ft_finish() callback will complete auth. */ return; #endif /* CONFIG_IEEE80211R */ } fail: send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg, auth_transaction + 1, resp, resp_ies, resp_ies_len); } static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) { int i, j = 32, aid; /* get a unique AID */ if (sta->aid > 0) { wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); return 0; } for (i = 0; i < AID_WORDS; i++) { if (hapd->sta_aid[i] == (u32) -1) continue; for (j = 0; j < 32; j++) { if (!(hapd->sta_aid[i] & BIT(j))) break; } if (j < 32) break; } if (j == 32) return -1; aid = i * 32 + j + 1; if (aid > 2007) return -1; sta->aid = aid; hapd->sta_aid[i] |= BIT(j); wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); return 0; } static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, const u8 *ssid_ie, size_t ssid_ie_len) { if (ssid_ie == NULL) return WLAN_STATUS_UNSPECIFIED_FAILURE; if (ssid_ie_len != hapd->conf->ssid.ssid_len || os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { char ssid_txt[33]; ieee802_11_print_ssid(ssid_txt, ssid_ie, ssid_ie_len); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station tried to associate with unknown SSID " "'%s'", ssid_txt); return WLAN_STATUS_UNSPECIFIED_FAILURE; } return WLAN_STATUS_SUCCESS; } static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, const u8 *wmm_ie, size_t wmm_ie_len) { sta->flags &= ~WLAN_STA_WMM; if (wmm_ie && hapd->conf->wmm_enabled) { if (hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, HOSTAPD_LEVEL_DEBUG, "invalid WMM element in association " "request"); else sta->flags |= WLAN_STA_WMM; } return WLAN_STATUS_SUCCESS; } static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, struct ieee802_11_elems *elems) { if (!elems->supp_rates) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "No supported rates element in AssocReq"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } if (elems->supp_rates_len > sizeof(sta->supported_rates)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Invalid supported rates element length %d", elems->supp_rates_len); return WLAN_STATUS_UNSPECIFIED_FAILURE; } os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates)); os_memcpy(sta->supported_rates, elems->supp_rates, elems->supp_rates_len); sta->supported_rates_len = elems->supp_rates_len; if (elems->ext_supp_rates) { if (elems->supp_rates_len + elems->ext_supp_rates_len > sizeof(sta->supported_rates)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Invalid supported rates element length" " %d+%d", elems->supp_rates_len, elems->ext_supp_rates_len); return WLAN_STATUS_UNSPECIFIED_FAILURE; } os_memcpy(sta->supported_rates + elems->supp_rates_len, elems->ext_supp_rates, elems->ext_supp_rates_len); sta->supported_rates_len += elems->ext_supp_rates_len; } return WLAN_STATUS_SUCCESS; } static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, const u8 *ies, size_t ies_len, int reassoc) { struct ieee802_11_elems elems; u16 resp; const u8 *wpa_ie; size_t wpa_ie_len; if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station sent an invalid " "association request"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = copy_supp_rates(hapd, sta, &elems); if (resp != WLAN_STATUS_SUCCESS) return resp; #ifdef CONFIG_IEEE80211N resp = copy_sta_ht_capab(sta, elems.ht_capabilities, elems.ht_capabilities_len); if (resp != WLAN_STATUS_SUCCESS) return resp; #endif /* CONFIG_IEEE80211N */ if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { wpa_ie = elems.rsn_ie; wpa_ie_len = elems.rsn_ie_len; } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && elems.wpa_ie) { wpa_ie = elems.wpa_ie; wpa_ie_len = elems.wpa_ie_len; } else { wpa_ie = NULL; wpa_ie_len = 0; } #ifdef CONFIG_WPS sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS); if (hapd->conf->wps_state && wpa_ie == NULL) { if (elems.wps_ie) { wpa_printf(MSG_DEBUG, "STA included WPS IE in " "(Re)Association Request - assume WPS is " "used"); sta->flags |= WLAN_STA_WPS; wpabuf_free(sta->wps_ie); sta->wps_ie = wpabuf_alloc_copy(elems.wps_ie + 4, elems.wps_ie_len - 4); } else { wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE " "in (Re)Association Request - possible WPS " "use"); sta->flags |= WLAN_STA_MAYBE_WPS; } } else #endif /* CONFIG_WPS */ if (hapd->conf->wpa && wpa_ie == NULL) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "No WPA/RSN IE in association request"); return WLAN_STATUS_INVALID_IE; } if (hapd->conf->wpa && wpa_ie) { int res; wpa_ie -= 2; wpa_ie_len += 2; if (sta->wpa_sm == NULL) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr); if (sta->wpa_sm == NULL) { wpa_printf(MSG_WARNING, "Failed to initialize WPA " "state machine"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, wpa_ie, wpa_ie_len, elems.mdie, elems.mdie_len); if (res == WPA_INVALID_GROUP) resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; else if (res == WPA_INVALID_PAIRWISE) resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; else if (res == WPA_INVALID_AKMP) resp = WLAN_STATUS_AKMP_NOT_VALID; else if (res == WPA_ALLOC_FAIL) resp = WLAN_STATUS_UNSPECIFIED_FAILURE; #ifdef CONFIG_IEEE80211W else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; #endif /* CONFIG_IEEE80211W */ else if (res == WPA_INVALID_MDIE) resp = WLAN_STATUS_INVALID_MDIE; else if (res != WPA_IE_OK) resp = WLAN_STATUS_INVALID_IE; if (resp != WLAN_STATUS_SUCCESS) return resp; #ifdef CONFIG_IEEE80211W if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && sta->sa_query_count > 0) ap_check_sa_query_timeout(hapd, sta); if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { /* * STA has already been associated with MFP and SA * Query timeout has not been reached. Reject the * association attempt temporarily and start SA Query, * if one is not pending. */ if (sta->sa_query_count == 0) ap_sta_start_sa_query(hapd, sta); return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; } if (wpa_auth_uses_mfp(sta->wpa_sm)) sta->flags |= WLAN_STA_MFP; else sta->flags &= ~WLAN_STA_MFP; #endif /* CONFIG_IEEE80211W */ #ifdef CONFIG_IEEE80211R if (sta->auth_alg == WLAN_AUTH_FT) { if (!reassoc) { wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " "to use association (not " "re-association) with FT auth_alg", MAC2STR(sta->addr)); return WLAN_STATUS_UNSPECIFIED_FAILURE; } resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, ies_len); if (resp != WLAN_STATUS_SUCCESS) return resp; } #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IEEE80211N if ((sta->flags & WLAN_STA_HT) && wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station tried to use TKIP with HT " "association"); return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; } #endif /* CONFIG_IEEE80211N */ } else wpa_auth_sta_no_wpa(sta->wpa_sm); return WLAN_STATUS_SUCCESS; } static void send_deauth(struct hostapd_data *hapd, const u8 *addr, u16 reason_code) { int send_len; struct ieee80211_mgmt reply; os_memset(&reply, 0, sizeof(reply)); reply.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); os_memcpy(reply.da, addr, ETH_ALEN); os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); reply.u.deauth.reason_code = host_to_le16(reason_code); if (hapd->drv.send_mgmt_frame(hapd, &reply, send_len) < 0) wpa_printf(MSG_INFO, "Failed to send deauth: %s", strerror(errno)); } static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, u16 status_code, int reassoc, const u8 *ies, size_t ies_len) { int send_len; u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; struct ieee80211_mgmt *reply; u8 *p; os_memset(buf, 0, sizeof(buf)); reply = (struct ieee80211_mgmt *) buf; reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : WLAN_FC_STYPE_ASSOC_RESP)); os_memcpy(reply->da, sta->addr, ETH_ALEN); os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); send_len = IEEE80211_HDRLEN; send_len += sizeof(reply->u.assoc_resp); reply->u.assoc_resp.capab_info = host_to_le16(hostapd_own_capab_info(hapd, sta, 0)); reply->u.assoc_resp.status_code = host_to_le16(status_code); reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) | BIT(14) | BIT(15)); /* Supported rates */ p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); /* Extended supported rates */ p = hostapd_eid_ext_supp_rates(hapd, p); if (sta->flags & WLAN_STA_WMM) p = hostapd_eid_wmm(hapd, p); #ifdef CONFIG_IEEE80211N p = hostapd_eid_ht_capabilities(hapd, p); p = hostapd_eid_ht_operation(hapd, p); #endif /* CONFIG_IEEE80211N */ #ifdef CONFIG_IEEE80211R if (status_code == WLAN_STATUS_SUCCESS) { /* IEEE 802.11r: Mobility Domain Information, Fast BSS * Transition Information, RSN, [RIC Response] */ p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, buf + sizeof(buf) - p, sta->auth_alg, ies, ies_len); } #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IEEE80211W if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) p = hostapd_eid_assoc_comeback_time(hapd, sta, p); #endif /* CONFIG_IEEE80211W */ send_len += p - reply->u.assoc_resp.variable; if (hapd->drv.send_mgmt_frame(hapd, reply, send_len) < 0) wpa_printf(MSG_INFO, "Failed to send assoc resp: %s", strerror(errno)); } static void handle_assoc(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int reassoc) { u16 capab_info, listen_interval; u16 resp = WLAN_STATUS_SUCCESS; const u8 *pos; int left, i; struct sta_info *sta; if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) : sizeof(mgmt->u.assoc_req))) { printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)" "\n", reassoc, (unsigned long) len); return; } if (reassoc) { capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info); listen_interval = le_to_host16( mgmt->u.reassoc_req.listen_interval); wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR " capab_info=0x%02x listen_interval=%d current_ap=" MACSTR, MAC2STR(mgmt->sa), capab_info, listen_interval, MAC2STR(mgmt->u.reassoc_req.current_ap)); left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req)); pos = mgmt->u.reassoc_req.variable; } else { capab_info = le_to_host16(mgmt->u.assoc_req.capab_info); listen_interval = le_to_host16( mgmt->u.assoc_req.listen_interval); wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR " capab_info=0x%02x listen_interval=%d", MAC2STR(mgmt->sa), capab_info, listen_interval); left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req)); pos = mgmt->u.assoc_req.variable; } sta = ap_get_sta(hapd, mgmt->sa); #ifdef CONFIG_IEEE80211R if (sta && sta->auth_alg == WLAN_AUTH_FT && (sta->flags & WLAN_STA_AUTH) == 0) { wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate " "prior to authentication since it is using " "over-the-DS FT", MAC2STR(mgmt->sa)); } else #endif /* CONFIG_IEEE80211R */ if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station tried to " "associate before authentication " "(aid=%d flags=0x%x)", sta ? sta->aid : -1, sta ? sta->flags : 0); send_deauth(hapd, mgmt->sa, WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA); return; } if (hapd->tkip_countermeasures) { resp = WLAN_REASON_MICHAEL_MIC_FAILURE; goto fail; } if (listen_interval > hapd->conf->max_listen_interval) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Too large Listen Interval (%d)", listen_interval); resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE; goto fail; } /* followed by SSID and Supported rates; and HT capabilities if 802.11n * is used */ resp = check_assoc_ies(hapd, sta, pos, left, reassoc); if (resp != WLAN_STATUS_SUCCESS) goto fail; if (hostapd_get_aid(hapd, sta) < 0) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "No room for more AIDs"); resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; goto fail; } sta->capability = capab_info; sta->listen_interval = listen_interval; if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) sta->flags |= WLAN_STA_NONERP; for (i = 0; i < sta->supported_rates_len; i++) { if ((sta->supported_rates[i] & 0x7f) > 22) { sta->flags &= ~WLAN_STA_NONERP; break; } } if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) { sta->nonerp_set = 1; hapd->iface->num_sta_non_erp++; if (hapd->iface->num_sta_non_erp == 1) ieee802_11_set_beacons(hapd->iface); } if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) && !sta->no_short_slot_time_set) { sta->no_short_slot_time_set = 1; hapd->iface->num_sta_no_short_slot_time++; if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->iface->num_sta_no_short_slot_time == 1) ieee802_11_set_beacons(hapd->iface); } if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) sta->flags |= WLAN_STA_SHORT_PREAMBLE; else sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && !sta->no_short_preamble_set) { sta->no_short_preamble_set = 1; hapd->iface->num_sta_no_short_preamble++; if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->iface->num_sta_no_short_preamble == 1) ieee802_11_set_beacons(hapd->iface); } #ifdef CONFIG_IEEE80211N update_ht_state(hapd, sta); #endif /* CONFIG_IEEE80211N */ hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "association OK (aid %d)", sta->aid); /* Station will be marked associated, after it acknowledges AssocResp */ #ifdef CONFIG_IEEE80211W if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) { wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out " "SA Query procedure", reassoc ? "re" : ""); /* TODO: Send a protected Disassociate frame to the STA using * the old key and Reason Code "Previous Authentication no * longer valid". Make sure this is only sent protected since * unprotected frame would be received by the STA that is now * trying to associate. */ } #endif /* CONFIG_IEEE80211W */ if (reassoc) { os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap, ETH_ALEN); } if (sta->last_assoc_req) os_free(sta->last_assoc_req); sta->last_assoc_req = os_malloc(len); if (sta->last_assoc_req) os_memcpy(sta->last_assoc_req, mgmt, len); /* Make sure that the previously registered inactivity timer will not * remove the STA immediately. */ sta->timeout_next = STA_NULLFUNC; fail: send_assoc_resp(hapd, sta, resp, reassoc, pos, left); } static void handle_disassoc(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len) { struct sta_info *sta; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) { printf("handle_disassoc - too short payload (len=%lu)\n", (unsigned long) len); return; } wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d", MAC2STR(mgmt->sa), le_to_host16(mgmt->u.disassoc.reason_code)); sta = ap_get_sta(hapd, mgmt->sa); if (sta == NULL) { printf("Station " MACSTR " trying to disassociate, but it " "is not associated.\n", MAC2STR(mgmt->sa)); return; } sta->flags &= ~WLAN_STA_ASSOC; wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR, MAC2STR(sta->addr)); wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "disassociated"); sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); /* Stop Accounting and IEEE 802.1X sessions, but leave the STA * authenticated. */ accounting_sta_stop(hapd, sta); ieee802_1x_free_station(sta); hapd->drv.sta_remove(hapd, sta->addr); if (sta->timeout_next == STA_NULLFUNC || sta->timeout_next == STA_DISASSOC) { sta->timeout_next = STA_DEAUTH; eloop_cancel_timeout(ap_handle_timer, hapd, sta); eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer, hapd, sta); } mlme_disassociate_indication( hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code)); } static void handle_deauth(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len) { struct sta_info *sta; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) { printf("handle_deauth - too short payload (len=%lu)\n", (unsigned long) len); return; } wpa_printf(MSG_DEBUG, "deauthentication: STA=" MACSTR " reason_code=%d", MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code)); sta = ap_get_sta(hapd, mgmt->sa); if (sta == NULL) { printf("Station " MACSTR " trying to deauthenticate, but it " "is not authenticated.\n", MAC2STR(mgmt->sa)); return; } sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC); wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR, MAC2STR(sta->addr)); wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "deauthenticated"); mlme_deauthenticate_indication( hapd, sta, le_to_host16(mgmt->u.deauth.reason_code)); sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); ap_free_sta(hapd, sta); } static void handle_beacon(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, struct hostapd_frame_info *fi) { struct ieee802_11_elems elems; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) { printf("handle_beacon - too short payload (len=%lu)\n", (unsigned long) len); return; } (void) ieee802_11_parse_elems(mgmt->u.beacon.variable, len - (IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)), &elems, 0); ap_list_process_beacon(hapd->iface, mgmt, &elems, fi); } #ifdef CONFIG_IEEE80211W /* MLME-SAQuery.request */ void ieee802_11_send_sa_query_req(struct hostapd_data *hapd, const u8 *addr, const u8 *trans_id) { struct ieee80211_mgmt mgmt; u8 *end; wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to " MACSTR, MAC2STR(addr)); wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", trans_id, WLAN_SA_QUERY_TR_ID_LEN); os_memset(&mgmt, 0, sizeof(mgmt)); mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION); os_memcpy(mgmt.da, addr, ETH_ALEN); os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN); os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN); mgmt.u.action.category = WLAN_ACTION_SA_QUERY; mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST; os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id, WLAN_SA_QUERY_TR_ID_LEN); end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; if (hapd->drv.send_mgmt_frame(hapd, &mgmt, end - (u8 *) &mgmt) < 0) perror("ieee802_11_send_sa_query_req: send"); } static void hostapd_sa_query_request(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt) { struct sta_info *sta; struct ieee80211_mgmt resp; u8 *end; wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from " MACSTR, MAC2STR(mgmt->sa)); wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", mgmt->u.action.u.sa_query_resp.trans_id, WLAN_SA_QUERY_TR_ID_LEN); sta = ap_get_sta(hapd, mgmt->sa); if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request " "from unassociated STA " MACSTR, MAC2STR(mgmt->sa)); return; } wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to " MACSTR, MAC2STR(mgmt->sa)); os_memset(&resp, 0, sizeof(resp)); resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION); os_memcpy(resp.da, mgmt->sa, ETH_ALEN); os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN); os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN); resp.u.action.category = WLAN_ACTION_SA_QUERY; resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE; os_memcpy(resp.u.action.u.sa_query_req.trans_id, mgmt->u.action.u.sa_query_req.trans_id, WLAN_SA_QUERY_TR_ID_LEN); end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; if (hapd->drv.send_mgmt_frame(hapd, &resp, end - (u8 *) &resp) < 0) perror("hostapd_sa_query_request: send"); } static void hostapd_sa_query_action(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len) { struct sta_info *sta; const u8 *end; int i; end = mgmt->u.action.u.sa_query_resp.trans_id + WLAN_SA_QUERY_TR_ID_LEN; if (((u8 *) mgmt) + len < end) { wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action " "frame (len=%lu)", (unsigned long) len); return; } if (mgmt->u.action.u.sa_query_resp.action == WLAN_SA_QUERY_REQUEST) { hostapd_sa_query_request(hapd, mgmt); return; } if (mgmt->u.action.u.sa_query_resp.action != WLAN_SA_QUERY_RESPONSE) { wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query " "Action %d", mgmt->u.action.u.sa_query_resp.action); return; } wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from " MACSTR, MAC2STR(mgmt->sa)); wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", mgmt->u.action.u.sa_query_resp.trans_id, WLAN_SA_QUERY_TR_ID_LEN); /* MLME-SAQuery.confirm */ sta = ap_get_sta(hapd, mgmt->sa); if (sta == NULL || sta->sa_query_trans_id == NULL) { wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with " "pending SA Query request found"); return; } for (i = 0; i < sta->sa_query_count; i++) { if (os_memcmp(sta->sa_query_trans_id + i * WLAN_SA_QUERY_TR_ID_LEN, mgmt->u.action.u.sa_query_resp.trans_id, WLAN_SA_QUERY_TR_ID_LEN) == 0) break; } if (i >= sta->sa_query_count) { wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query " "transaction identifier found"); return; } hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Reply to pending SA Query received"); ap_sta_stop_sa_query(hapd, sta); } static int robust_action_frame(u8 category) { return category != WLAN_ACTION_PUBLIC && category != WLAN_ACTION_HT; } #endif /* CONFIG_IEEE80211W */ static void handle_action(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len) { struct sta_info *sta; if (len < IEEE80211_HDRLEN + 1) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "handle_action - too short payload (len=%lu)", (unsigned long) len); return; } sta = ap_get_sta(hapd, mgmt->sa); #ifdef CONFIG_IEEE80211W if (sta && (sta->flags & WLAN_STA_MFP) && !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP) && robust_action_frame(mgmt->u.action.category))) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Dropped unprotected Robust Action frame from " "an MFP STA"); return; } #endif /* CONFIG_IEEE80211W */ switch (mgmt->u.action.category) { #ifdef CONFIG_IEEE80211R case WLAN_ACTION_FT: { if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action " "frame from unassociated STA " MACSTR, MAC2STR(mgmt->sa)); return; } if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, len - IEEE80211_HDRLEN)) break; return; } #endif /* CONFIG_IEEE80211R */ case WLAN_ACTION_WMM: hostapd_wmm_action(hapd, mgmt, len); return; #ifdef CONFIG_IEEE80211W case WLAN_ACTION_SA_QUERY: hostapd_sa_query_action(hapd, mgmt, len); return; #endif /* CONFIG_IEEE80211W */ } hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "handle_action - unknown action category %d or invalid " "frame", mgmt->u.action.category); if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) && !(mgmt->sa[0] & 0x01)) { struct ieee80211_mgmt *resp; /* * IEEE 802.11-REVma/D9.0 - 7.3.1.11 * Return the Action frame to the source without change * except that MSB of the Category set to 1. */ wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " "frame back to sender"); resp = os_malloc(len); if (resp == NULL) return; os_memcpy(resp, mgmt, len); os_memcpy(resp->da, resp->sa, ETH_ALEN); os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); resp->u.action.category |= 0x80; hapd->drv.send_mgmt_frame(hapd, resp, len); os_free(resp); } } /** * ieee802_11_mgmt - process incoming IEEE 802.11 management frames * @hapd: hostapd BSS data structure (the BSS to which the management frame was * sent to) * @buf: management frame data (starting from IEEE 802.11 header) * @len: length of frame data in octets * @fi: meta data about received frame (signal level, etc.) * * Process all incoming IEEE 802.11 management frames. This will be called for * each frame received from the kernel driver through wlan#ap interface. In * addition, it can be called to re-inserted pending frames (e.g., when using * external RADIUS server as an MAC ACL). */ void ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, struct hostapd_frame_info *fi) { struct ieee80211_mgmt *mgmt; int broadcast; u16 fc, stype; mgmt = (struct ieee80211_mgmt *) buf; fc = le_to_host16(mgmt->frame_control); stype = WLAN_FC_GET_STYPE(fc); if (stype == WLAN_FC_STYPE_BEACON) { handle_beacon(hapd, mgmt, len, fi); return; } broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff && mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff && mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff; if (!broadcast && os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { printf("MGMT: BSSID=" MACSTR " not our address\n", MAC2STR(mgmt->bssid)); return; } if (stype == WLAN_FC_STYPE_PROBE_REQ) { handle_probe_req(hapd, mgmt, len); return; } if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "MGMT: DA=" MACSTR " not our address", MAC2STR(mgmt->da)); return; } switch (stype) { case WLAN_FC_STYPE_AUTH: wpa_printf(MSG_DEBUG, "mgmt::auth"); handle_auth(hapd, mgmt, len); break; case WLAN_FC_STYPE_ASSOC_REQ: wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); handle_assoc(hapd, mgmt, len, 0); break; case WLAN_FC_STYPE_REASSOC_REQ: wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); handle_assoc(hapd, mgmt, len, 1); break; case WLAN_FC_STYPE_DISASSOC: wpa_printf(MSG_DEBUG, "mgmt::disassoc"); handle_disassoc(hapd, mgmt, len); break; case WLAN_FC_STYPE_DEAUTH: wpa_printf(MSG_DEBUG, "mgmt::deauth"); handle_deauth(hapd, mgmt, len); break; case WLAN_FC_STYPE_ACTION: wpa_printf(MSG_DEBUG, "mgmt::action"); handle_action(hapd, mgmt, len); break; default: hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "unknown mgmt frame subtype %d", stype); break; } } static void handle_auth_cb(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int ok) { u16 auth_alg, auth_transaction, status_code; struct sta_info *sta; if (!ok) { hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE, "did not acknowledge authentication response"); return; } if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { printf("handle_auth_cb - too short payload (len=%lu)\n", (unsigned long) len); return; } auth_alg = le_to_host16(mgmt->u.auth.auth_alg); auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); status_code = le_to_host16(mgmt->u.auth.status_code); sta = ap_get_sta(hapd, mgmt->da); if (!sta) { printf("handle_auth_cb: STA " MACSTR " not found\n", MAC2STR(mgmt->da)); return; } if (status_code == WLAN_STATUS_SUCCESS && ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "authenticated"); sta->flags |= WLAN_STA_AUTH; } } static void handle_assoc_cb(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int reassoc, int ok) { u16 status; struct sta_info *sta; int new_assoc = 1; struct ieee80211_ht_capabilities ht_cap; if (!ok) { hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "did not acknowledge association response"); return; } if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : sizeof(mgmt->u.assoc_resp))) { printf("handle_assoc_cb(reassoc=%d) - too short payload " "(len=%lu)\n", reassoc, (unsigned long) len); return; } if (reassoc) status = le_to_host16(mgmt->u.reassoc_resp.status_code); else status = le_to_host16(mgmt->u.assoc_resp.status_code); sta = ap_get_sta(hapd, mgmt->da); if (!sta) { printf("handle_assoc_cb: STA " MACSTR " not found\n", MAC2STR(mgmt->da)); return; } if (status != WLAN_STATUS_SUCCESS) goto fail; /* Stop previous accounting session, if one is started, and allocate * new session id for the new session. */ accounting_sta_stop(hapd, sta); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "associated (aid %d)", sta->aid); if (sta->flags & WLAN_STA_ASSOC) new_assoc = 0; sta->flags |= WLAN_STA_ASSOC; if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) || sta->auth_alg == WLAN_AUTH_FT) { /* * Open, static WEP, or FT protocol; no separate authorization * step. */ sta->flags |= WLAN_STA_AUTHORIZED; wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr)); } if (reassoc) mlme_reassociate_indication(hapd, sta); else mlme_associate_indication(hapd, sta); #ifdef CONFIG_IEEE80211W sta->sa_query_timed_out = 0; #endif /* CONFIG_IEEE80211W */ /* * Remove the STA entry in order to make sure the STA PS state gets * cleared and configuration gets updated in case of reassociation back * to the same AP. */ hapd->drv.sta_remove(hapd, sta->addr); #ifdef CONFIG_IEEE80211N if (sta->flags & WLAN_STA_HT) hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); #endif /* CONFIG_IEEE80211N */ if (hapd->drv.sta_add(hapd, sta->addr, sta->aid, sta->capability, sta->supported_rates, sta->supported_rates_len, sta->listen_interval, sta->flags & WLAN_STA_HT ? &ht_cap : NULL)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE, "Could not add STA to kernel driver"); } if (sta->eapol_sm == NULL) { /* * This STA does not use RADIUS server for EAP authentication, * so bind it to the selected VLAN interface now, since the * interface selection is not going to change anymore. */ ap_sta_bind_vlan(hapd, sta, 0); } else if (sta->vlan_id) { /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ ap_sta_bind_vlan(hapd, sta, 0); } hapd->drv.set_sta_flags(hapd, sta); if (sta->auth_alg == WLAN_AUTH_FT) wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); else wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); fail: /* Copy of the association request is not needed anymore */ if (sta->last_assoc_req) { os_free(sta->last_assoc_req); sta->last_assoc_req = NULL; } } /** * ieee802_11_mgmt_cb - Process management frame TX status callback * @hapd: hostapd BSS data structure (the BSS from which the management frame * was sent from) * @buf: management frame data (starting from IEEE 802.11 header) * @len: length of frame data in octets * @stype: management frame subtype from frame control field * @ok: Whether the frame was ACK'ed */ void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, u16 stype, int ok) { const struct ieee80211_mgmt *mgmt; mgmt = (const struct ieee80211_mgmt *) buf; switch (stype) { case WLAN_FC_STYPE_AUTH: wpa_printf(MSG_DEBUG, "mgmt::auth cb"); handle_auth_cb(hapd, mgmt, len, ok); break; case WLAN_FC_STYPE_ASSOC_RESP: wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); handle_assoc_cb(hapd, mgmt, len, 0, ok); break; case WLAN_FC_STYPE_REASSOC_RESP: wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); handle_assoc_cb(hapd, mgmt, len, 1, ok); break; case WLAN_FC_STYPE_PROBE_RESP: wpa_printf(MSG_DEBUG, "mgmt::proberesp cb"); break; case WLAN_FC_STYPE_DEAUTH: /* ignore */ break; case WLAN_FC_STYPE_ACTION: wpa_printf(MSG_DEBUG, "mgmt::action cb"); break; default: printf("unknown mgmt cb frame subtype %d\n", stype); break; } } int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) { /* TODO */ return 0; } int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, char *buf, size_t buflen) { /* TODO */ return 0; } void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, const u8 *buf, size_t len, int ack) { struct sta_info *sta; struct hostapd_iface *iface = hapd->iface; sta = ap_get_sta(hapd, addr); if (sta == NULL && iface->num_bss > 1) { size_t j; for (j = 0; j < iface->num_bss; j++) { hapd = iface->bss[j]; sta = ap_get_sta(hapd, addr); if (sta) break; } } if (sta == NULL) return; if (sta->flags & WLAN_STA_PENDING_POLL) { wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " "activity poll", MAC2STR(sta->addr), ack ? "ACKed" : "did not ACK"); if (ack) sta->flags &= ~WLAN_STA_PENDING_POLL; } ieee802_1x_tx_status(hapd, sta, buf, len, ack); } void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, int wds) { struct sta_info *sta; sta = ap_get_sta(hapd, src); if (sta && (sta->flags & WLAN_STA_ASSOC)) { if (wds && !(sta->flags & WLAN_STA_WDS)) { wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " "STA " MACSTR " (aid %u)", MAC2STR(sta->addr), sta->aid); sta->flags |= WLAN_STA_WDS; hapd->drv.set_wds_sta(hapd, sta->addr, sta->aid, 1); } return; } wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " MACSTR, MAC2STR(src)); if (sta && (sta->flags & WLAN_STA_AUTH)) hapd->drv.sta_disassoc( hapd, src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); else hapd->drv.sta_deauth( hapd, src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); } #endif /* CONFIG_NATIVE_WINDOWS */