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fragattacks/src/ap/ieee802_11.c
Jouni Malinen 5ce00d09c0 GAS server: Add support for Protected Dual of Public Action frames 
When GAS is used with PMF negotiated, Protected Dual of Public Action
frames are expected to be used instead of Public Action frames, i.e.,
the GAS/ANQP frames are expected to be encrypted. Add support for this
different category of Action frames being used for GAS. The payload
after the Category field is identical, so the only change is in using
the Category field based on what was received in the request frames. For
backwards compatibility, do not enforce protected dual to be used on the
AP side, i.e., follow what the station does.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2014-01-23 11:19:55 +02:00

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62 KiB
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/*
* hostapd / IEEE 802.11 Management
* Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#ifndef CONFIG_NATIVE_WINDOWS
#include "utils/common.h"
#include "utils/eloop.h"
#include "crypto/crypto.h"
#include "crypto/sha256.h"
#include "crypto/random.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/wpa_ctrl.h"
#include "common/sae.h"
#include "radius/radius.h"
#include "radius/radius_client.h"
#include "p2p/p2p.h"
#include "wps/wps.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 "p2p_hostapd.h"
#include "ap_drv_ops.h"
#include "wnm_ap.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 (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
num++;
if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
num++;
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++;
}
if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
count++;
*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
}
if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
count++;
*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
}
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 (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
num++;
if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
num++;
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++;
}
if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
count++;
if (count > 8)
*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
}
if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
count++;
if (count > 8)
*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
}
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;
}
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';
}
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];
struct os_time now;
int r;
sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
if (sta->challenge == NULL)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
os_get_time(&now);
r = os_random();
os_memcpy(key, &now.sec, 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)");
sta->flags |= WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
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 (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0)
wpa_printf(MSG_INFO, "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 */
#ifdef CONFIG_SAE
static struct wpabuf * auth_process_sae_commit(struct hostapd_data *hapd,
struct sta_info *sta)
{
struct wpabuf *buf;
if (hapd->conf->ssid.wpa_passphrase == NULL) {
wpa_printf(MSG_DEBUG, "SAE: No password available");
return NULL;
}
if (sae_prepare_commit(hapd->own_addr, sta->addr,
(u8 *) hapd->conf->ssid.wpa_passphrase,
os_strlen(hapd->conf->ssid.wpa_passphrase),
sta->sae) < 0) {
wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
return NULL;
}
if (sae_process_commit(sta->sae) < 0) {
wpa_printf(MSG_DEBUG, "SAE: Failed to process peer commit");
return NULL;
}
buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN);
if (buf == NULL)
return NULL;
sae_write_commit(sta->sae, buf, NULL);
return buf;
}
static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
struct sta_info *sta)
{
struct wpabuf *buf;
buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
if (buf == NULL)
return NULL;
sae_write_confirm(sta->sae, buf);
return buf;
}
static int use_sae_anti_clogging(struct hostapd_data *hapd)
{
struct sta_info *sta;
unsigned int open = 0;
if (hapd->conf->sae_anti_clogging_threshold == 0)
return 1;
for (sta = hapd->sta_list; sta; sta = sta->next) {
if (!sta->sae)
continue;
if (sta->sae->state != SAE_COMMITTED &&
sta->sae->state != SAE_CONFIRMED)
continue;
open++;
if (open >= hapd->conf->sae_anti_clogging_threshold)
return 1;
}
return 0;
}
static int check_sae_token(struct hostapd_data *hapd, const u8 *addr,
const u8 *token, size_t token_len)
{
u8 mac[SHA256_MAC_LEN];
if (token_len != SHA256_MAC_LEN)
return -1;
if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
addr, ETH_ALEN, mac) < 0 ||
os_memcmp(token, mac, SHA256_MAC_LEN) != 0)
return -1;
return 0;
}
static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
const u8 *addr)
{
struct wpabuf *buf;
u8 *token;
struct os_reltime now;
os_get_reltime(&now);
if (!os_reltime_initialized(&hapd->last_sae_token_key_update) ||
os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) {
if (random_get_bytes(hapd->sae_token_key,
sizeof(hapd->sae_token_key)) < 0)
return NULL;
wpa_hexdump(MSG_DEBUG, "SAE: Updated token key",
hapd->sae_token_key, sizeof(hapd->sae_token_key));
hapd->last_sae_token_key_update = now;
}
buf = wpabuf_alloc(SHA256_MAC_LEN);
if (buf == NULL)
return NULL;
token = wpabuf_put(buf, SHA256_MAC_LEN);
hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
addr, ETH_ALEN, token);
return buf;
}
static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
const struct ieee80211_mgmt *mgmt, size_t len,
u8 auth_transaction)
{
u16 resp = WLAN_STATUS_SUCCESS;
struct wpabuf *data = NULL;
if (!sta->sae) {
if (auth_transaction != 1)
return;
sta->sae = os_zalloc(sizeof(*sta->sae));
if (sta->sae == NULL)
return;
sta->sae->state = SAE_NOTHING;
}
if (auth_transaction == 1) {
const u8 *token = NULL;
size_t token_len = 0;
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"start SAE authentication (RX commit)");
resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
((const u8 *) mgmt) + len -
mgmt->u.auth.variable, &token,
&token_len, hapd->conf->sae_groups);
if (token && check_sae_token(hapd, sta->addr, token, token_len)
< 0) {
wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
"incorrect token from " MACSTR,
MAC2STR(sta->addr));
return;
}
if (resp == WLAN_STATUS_SUCCESS) {
if (!token && use_sae_anti_clogging(hapd)) {
wpa_printf(MSG_DEBUG, "SAE: Request anti-"
"clogging token from " MACSTR,
MAC2STR(sta->addr));
data = auth_build_token_req(hapd, sta->addr);
resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
} else {
data = auth_process_sae_commit(hapd, sta);
if (data == NULL)
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
else
sta->sae->state = SAE_COMMITTED;
}
}
} else if (auth_transaction == 2) {
if (sta->sae->state != SAE_COMMITTED) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"SAE confirm before commit");
resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
}
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"SAE authentication (RX confirm)");
if (sae_check_confirm(sta->sae, mgmt->u.auth.variable,
((u8 *) mgmt) + len -
mgmt->u.auth.variable) < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
} else {
resp = WLAN_STATUS_SUCCESS;
sta->flags |= WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
sta->auth_alg = WLAN_AUTH_SAE;
mlme_authenticate_indication(hapd, sta);
data = auth_build_sae_confirm(hapd, sta);
if (data == NULL)
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
else {
sta->sae->state = SAE_ACCEPTED;
sae_clear_temp_data(sta->sae);
}
}
} else {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"unexpected SAE authentication transaction %u",
auth_transaction);
resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
}
sta->auth_alg = WLAN_AUTH_SAE;
send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
auth_transaction, resp,
data ? wpabuf_head(data) : (u8 *) "",
data ? wpabuf_len(data) : 0);
wpabuf_free(data);
}
#endif /* CONFIG_SAE */
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;
struct hostapd_sta_wpa_psk_short *psk = NULL;
u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
size_t resp_ies_len = 0;
char *identity = NULL;
char *radius_cui = NULL;
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
(unsigned long) len);
return;
}
#ifdef CONFIG_TESTING_OPTIONS
if (hapd->iconf->ignore_auth_probability > 0.0d &&
drand48() < hapd->iconf->ignore_auth_probability) {
wpa_printf(MSG_INFO,
"TESTING: ignoring auth frame from " MACSTR,
MAC2STR(mgmt->sa));
return;
}
#endif /* CONFIG_TESTING_OPTIONS */
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 && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
auth_alg == WLAN_AUTH_FT) ||
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_SAE
(hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
auth_alg == WLAN_AUTH_SAE) ||
#endif /* CONFIG_SAE */
((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
auth_alg == WLAN_AUTH_SHARED_KEY))) {
wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
auth_alg);
resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
goto fail;
}
if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
(auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
auth_transaction);
resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
goto fail;
}
if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
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,
&psk, &identity, &radius_cui);
if (res == HOSTAPD_ACL_REJECT) {
wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
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_AP_UNABLE_TO_HANDLE_NEW_STA;
goto fail;
}
if (vlan_id > 0) {
if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) {
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);
}
hostapd_free_psk_list(sta->psk);
if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) {
sta->psk = psk;
psk = NULL;
} else {
sta->psk = NULL;
}
sta->identity = identity;
identity = NULL;
sta->radius_cui = radius_cui;
radius_cui = NULL;
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)");
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);
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, NULL);
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 */
#ifdef CONFIG_SAE
case WLAN_AUTH_SAE:
handle_auth_sae(hapd, sta, mgmt, len, auth_transaction);
return;
#endif /* CONFIG_SAE */
}
fail:
os_free(identity);
os_free(radius_cui);
hostapd_free_psk_list(psk);
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;
sta->qosinfo = 0;
if (wmm_ie && hapd->conf->wmm_enabled) {
struct wmm_information_element *wmm;
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");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
sta->flags |= WLAN_STA_WMM;
wmm = (struct wmm_information_element *) wmm_ie;
sta->qosinfo = wmm->qos_info;
}
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 + 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;
}
sta->supported_rates_len = merge_byte_arrays(
sta->supported_rates, sizeof(sta->supported_rates),
elems->supp_rates, elems->supp_rates_len,
elems->ext_supp_rates, elems->ext_supp_rates_len);
return WLAN_STATUS_SUCCESS;
}
static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta,
const u8 *ext_capab_ie, size_t ext_capab_ie_len)
{
#ifdef CONFIG_INTERWORKING
/* check for QoS Map support */
if (ext_capab_ie_len >= 5) {
if (ext_capab_ie[4] & 0x01)
sta->qos_map_enabled = 1;
}
#endif /* CONFIG_INTERWORKING */
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;
const u8 *p2p_dev_addr = NULL;
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 = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_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(hapd, sta, elems.ht_capabilities,
elems.ht_capabilities_len);
if (resp != WLAN_STATUS_SUCCESS)
return resp;
if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
!(sta->flags & WLAN_STA_HT)) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO, "Station does not support "
"mandatory HT PHY - reject association");
return WLAN_STATUS_ASSOC_DENIED_NO_HT;
}
#endif /* CONFIG_IEEE80211N */
#ifdef CONFIG_IEEE80211AC
resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities,
elems.vht_capabilities_len);
if (resp != WLAN_STATUS_SUCCESS)
return resp;
if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
!(sta->flags & WLAN_STA_VHT)) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO, "Station does not support "
"mandatory VHT PHY - reject association");
return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
}
#endif /* CONFIG_IEEE80211AC */
#ifdef CONFIG_P2P
if (elems.p2p) {
wpabuf_free(sta->p2p_ie);
sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
P2P_IE_VENDOR_TYPE);
if (sta->p2p_ie)
p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
} else {
wpabuf_free(sta->p2p_ie);
sta->p2p_ie = NULL;
}
#endif /* CONFIG_P2P */
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 | WLAN_STA_WPS2);
if (hapd->conf->wps_state && 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 = ieee802_11_vendor_ie_concat(ies, ies_len,
WPS_IE_VENDOR_TYPE);
if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
sta->flags |= WLAN_STA_WPS2;
}
wpa_ie = NULL;
wpa_ie_len = 0;
if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
"(Re)Association Request - reject");
return WLAN_STATUS_INVALID_IE;
}
} else if (hapd->conf->wps_state && wpa_ie == NULL) {
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,
p2p_dev_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_SAE
if (wpa_auth_uses_sae(sta->wpa_sm) &&
sta->auth_alg != WLAN_AUTH_SAE &&
!(sta->auth_alg == WLAN_AUTH_FT &&
wpa_auth_uses_ft_sae(sta->wpa_sm))) {
wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
"SAE AKM after non-SAE auth_alg %u",
MAC2STR(sta->addr), sta->auth_alg);
return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
}
#endif /* CONFIG_SAE */
#ifdef CONFIG_IEEE80211N
if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
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);
#ifdef CONFIG_P2P
p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
#endif /* CONFIG_P2P */
#ifdef CONFIG_HS20
wpabuf_free(sta->hs20_ie);
if (elems.hs20 && elems.hs20_len > 4) {
sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
elems.hs20_len - 4);
} else
sta->hs20_ie = NULL;
#endif /* CONFIG_HS20 */
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 (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 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);
#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 */
#ifdef CONFIG_IEEE80211N
p = hostapd_eid_ht_capabilities(hapd, p);
p = hostapd_eid_ht_operation(hapd, p);
#endif /* CONFIG_IEEE80211N */
#ifdef CONFIG_IEEE80211AC
p = hostapd_eid_vht_capabilities(hapd, p);
p = hostapd_eid_vht_operation(hapd, p);
#endif /* CONFIG_IEEE80211AC */
p = hostapd_eid_ext_capab(hapd, p);
p = hostapd_eid_bss_max_idle_period(hapd, p);
if (sta->qos_map_enabled)
p = hostapd_eid_qos_map_set(hapd, p);
if (sta->flags & WLAN_STA_WMM)
p = hostapd_eid_wmm(hapd, p);
#ifdef CONFIG_WPS
if ((sta->flags & WLAN_STA_WPS) ||
((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) {
struct wpabuf *wps = wps_build_assoc_resp_ie();
if (wps) {
os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
p += wpabuf_len(wps);
wpabuf_free(wps);
}
}
#endif /* CONFIG_WPS */
#ifdef CONFIG_P2P
if (sta->p2p_ie) {
struct wpabuf *p2p_resp_ie;
enum p2p_status_code status;
switch (status_code) {
case WLAN_STATUS_SUCCESS:
status = P2P_SC_SUCCESS;
break;
case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
status = P2P_SC_FAIL_LIMIT_REACHED;
break;
default:
status = P2P_SC_FAIL_INVALID_PARAMS;
break;
}
p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
if (p2p_resp_ie) {
os_memcpy(p, wpabuf_head(p2p_resp_ie),
wpabuf_len(p2p_resp_ie));
p += wpabuf_len(p2p_resp_ie);
wpabuf_free(p2p_resp_ie);
}
}
#endif /* CONFIG_P2P */
#ifdef CONFIG_P2P_MANAGER
if (hapd->conf->p2p & P2P_MANAGE)
p = hostapd_eid_p2p_manage(hapd, p);
#endif /* CONFIG_P2P_MANAGER */
send_len += p - reply->u.assoc_resp.variable;
if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 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))) {
wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
reassoc, (unsigned long) len);
return;
}
#ifdef CONFIG_TESTING_OPTIONS
if (reassoc) {
if (hapd->iconf->ignore_reassoc_probability > 0.0d &&
drand48() < hapd->iconf->ignore_reassoc_probability) {
wpa_printf(MSG_INFO,
"TESTING: ignoring reassoc request from "
MACSTR, MAC2STR(mgmt->sa));
return;
}
} else {
if (hapd->iconf->ignore_assoc_probability > 0.0d &&
drand48() < hapd->iconf->ignore_assoc_probability) {
wpa_printf(MSG_INFO,
"TESTING: ignoring assoc request from "
MACSTR, MAC2STR(mgmt->sa));
return;
}
}
#endif /* CONFIG_TESTING_OPTIONS */
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
*/
sta->flags |= WLAN_STA_ASSOC_REQ_OK;
#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)) {
wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
(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) {
wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
MAC2STR(mgmt->sa));
return;
}
ap_sta_set_authorized(hapd, sta, 0);
sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
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);
hostapd_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)) {
wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
"payload (len=%lu)", (unsigned long) len);
return;
}
wpa_msg(hapd->msg_ctx, 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) {
wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
"to deauthenticate, but it is not authenticated",
MAC2STR(mgmt->sa));
return;
}
ap_sta_set_authorized(hapd, sta, 0);
sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
WLAN_STA_ASSOC_REQ_OK);
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)) {
wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
(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
static int hostapd_sa_query_action(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt,
size_t len)
{
const u8 *end;
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 0;
}
ieee802_11_sa_query_action(hapd, mgmt->sa,
mgmt->u.action.u.sa_query_resp.action,
mgmt->u.action.u.sa_query_resp.trans_id);
return 1;
}
static int robust_action_frame(u8 category)
{
return category != WLAN_ACTION_PUBLIC &&
category != WLAN_ACTION_HT;
}
#endif /* CONFIG_IEEE80211W */
static int handle_action(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt, size_t len)
{
struct sta_info *sta;
sta = ap_get_sta(hapd, mgmt->sa);
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 0;
}
if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
(sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
"frame (category=%u) from unassociated STA " MACSTR,
MAC2STR(mgmt->sa), mgmt->u.action.category);
return 0;
}
#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 0;
}
#endif /* CONFIG_IEEE80211W */
switch (mgmt->u.action.category) {
#ifdef CONFIG_IEEE80211R
case WLAN_ACTION_FT:
if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
len - IEEE80211_HDRLEN))
break;
return 1;
#endif /* CONFIG_IEEE80211R */
case WLAN_ACTION_WMM:
hostapd_wmm_action(hapd, mgmt, len);
return 1;
#ifdef CONFIG_IEEE80211W
case WLAN_ACTION_SA_QUERY:
return hostapd_sa_query_action(hapd, mgmt, len);
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_WNM
case WLAN_ACTION_WNM:
ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
return 1;
#endif /* CONFIG_WNM */
case WLAN_ACTION_PUBLIC:
case WLAN_ACTION_PROTECTED_DUAL:
if (hapd->public_action_cb) {
hapd->public_action_cb(hapd->public_action_cb_ctx,
(u8 *) mgmt, len,
hapd->iface->freq);
}
if (hapd->public_action_cb2) {
hapd->public_action_cb2(hapd->public_action_cb2_ctx,
(u8 *) mgmt, len,
hapd->iface->freq);
}
if (hapd->public_action_cb || hapd->public_action_cb2)
return 1;
break;
case WLAN_ACTION_VENDOR_SPECIFIC:
if (hapd->vendor_action_cb) {
if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
(u8 *) mgmt, len,
hapd->iface->freq) == 0)
return 1;
}
break;
}
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 0;
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;
if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) {
wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
"Action frame");
}
os_free(resp);
}
return 1;
}
/**
* 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).
*/
int 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;
int ret = 0;
#ifdef CONFIG_TESTING_OPTIONS
if (hapd->ext_mgmt_frame_handling) {
size_t hex_len = 2 * len + 1;
char *hex = os_malloc(hex_len);
if (hex) {
wpa_snprintf_hex(hex, hex_len, buf, len);
wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-RX %s", hex);
os_free(hex);
}
return 1;
}
#endif /* CONFIG_TESTING_OPTIONS */
if (len < 24)
return 0;
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 1;
}
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 &&
#ifdef CONFIG_P2P
/* Invitation responses can be sent with the peer MAC as BSSID */
!((hapd->conf->p2p & P2P_GROUP_OWNER) &&
stype == WLAN_FC_STYPE_ACTION) &&
#endif /* CONFIG_P2P */
os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
MAC2STR(mgmt->bssid));
return 0;
}
if (stype == WLAN_FC_STYPE_PROBE_REQ) {
handle_probe_req(hapd, mgmt, len, fi->ssi_signal);
return 1;
}
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 0;
}
switch (stype) {
case WLAN_FC_STYPE_AUTH:
wpa_printf(MSG_DEBUG, "mgmt::auth");
handle_auth(hapd, mgmt, len);
ret = 1;
break;
case WLAN_FC_STYPE_ASSOC_REQ:
wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
handle_assoc(hapd, mgmt, len, 0);
ret = 1;
break;
case WLAN_FC_STYPE_REASSOC_REQ:
wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
handle_assoc(hapd, mgmt, len, 1);
ret = 1;
break;
case WLAN_FC_STYPE_DISASSOC:
wpa_printf(MSG_DEBUG, "mgmt::disassoc");
handle_disassoc(hapd, mgmt, len);
ret = 1;
break;
case WLAN_FC_STYPE_DEAUTH:
wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
handle_deauth(hapd, mgmt, len);
ret = 1;
break;
case WLAN_FC_STYPE_ACTION:
wpa_printf(MSG_DEBUG, "mgmt::action");
ret = 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;
}
return ret;
}
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)) {
wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
(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) {
wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found",
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 hostapd_set_wds_encryption(struct hostapd_data *hapd,
struct sta_info *sta,
char *ifname_wds)
{
int i;
struct hostapd_ssid *ssid = sta->ssid;
if (hapd->conf->ieee802_1x || hapd->conf->wpa)
return;
for (i = 0; i < 4; i++) {
if (ssid->wep.key[i] &&
hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
i == ssid->wep.idx, NULL, 0,
ssid->wep.key[i], ssid->wep.len[i])) {
wpa_printf(MSG_WARNING,
"Could not set WEP keys for WDS interface; %s",
ifname_wds);
break;
}
}
}
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;
struct ieee80211_vht_capabilities vht_cap;
if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
sizeof(mgmt->u.assoc_resp))) {
wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
reassoc, (unsigned long) len);
return;
}
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
MAC2STR(mgmt->da));
return;
}
if (!ok) {
hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"did not acknowledge association response");
sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
return;
}
if (reassoc)
status = le_to_host16(mgmt->u.reassoc_resp.status_code);
else
status = le_to_host16(mgmt->u.assoc_resp.status_code);
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;
sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) ||
sta->auth_alg == WLAN_AUTH_FT) {
/*
* Open, static WEP, or FT protocol; no separate authorization
* step.
*/
ap_sta_set_authorized(hapd, sta, 1);
}
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.
*/
hostapd_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 */
#ifdef CONFIG_IEEE80211AC
if (sta->flags & WLAN_STA_VHT)
hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
#endif /* CONFIG_IEEE80211AC */
if (hostapd_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,
sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
sta->flags, sta->qosinfo)) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_NOTICE,
"Could not add STA to kernel driver");
ap_sta_disconnect(hapd, sta, sta->addr,
WLAN_REASON_DISASSOC_AP_BUSY);
goto fail;
}
if (sta->flags & WLAN_STA_WDS) {
int ret;
char ifname_wds[IFNAMSIZ + 1];
ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
sta->aid, 1);
if (!ret)
hostapd_set_wds_encryption(hapd, sta, ifname_wds);
}
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.
*/
if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
goto fail;
} else if (sta->vlan_id) {
/* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
goto fail;
}
hostapd_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;
}
}
static void handle_deauth_cb(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt,
size_t len, int ok)
{
struct sta_info *sta;
if (mgmt->da[0] & 0x01)
return;
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
" not found", MAC2STR(mgmt->da));
return;
}
if (ok)
wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
MAC2STR(sta->addr));
else
wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
"deauth", MAC2STR(sta->addr));
ap_sta_deauth_cb(hapd, sta);
}
static void handle_disassoc_cb(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt,
size_t len, int ok)
{
struct sta_info *sta;
if (mgmt->da[0] & 0x01)
return;
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
" not found", MAC2STR(mgmt->da));
return;
}
if (ok)
wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
MAC2STR(sta->addr));
else
wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
"disassoc", MAC2STR(sta->addr));
ap_sta_disassoc_cb(hapd, sta);
}
/**
* 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;
#ifdef CONFIG_TESTING_OPTIONS
if (hapd->ext_mgmt_frame_handling) {
wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d",
stype, ok);
return;
}
#endif /* CONFIG_TESTING_OPTIONS */
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_EXCESSIVE, "mgmt::proberesp cb");
break;
case WLAN_FC_STYPE_DEAUTH:
wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
handle_deauth_cb(hapd, mgmt, len, ok);
break;
case WLAN_FC_STYPE_DISASSOC:
wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
handle_disassoc_cb(hapd, mgmt, len, ok);
break;
case WLAN_FC_STYPE_ACTION:
wpa_printf(MSG_DEBUG, "mgmt::action cb");
break;
default:
wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", 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 || !(sta->flags & WLAN_STA_ASSOC))
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 hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
const u8 *data, size_t len, int ack)
{
struct sta_info *sta;
struct hostapd_iface *iface = hapd->iface;
sta = ap_get_sta(hapd, dst);
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, dst);
if (sta)
break;
}
}
if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
MACSTR " that is not currently associated",
MAC2STR(dst));
return;
}
ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
}
void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
{
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))
return;
wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
"activity poll", MAC2STR(sta->addr));
sta->flags &= ~WLAN_STA_PENDING_POLL;
}
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 (!hapd->conf->wds_sta)
return;
if (wds && !(sta->flags & WLAN_STA_WDS)) {
int ret;
char ifname_wds[IFNAMSIZ + 1];
wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
"STA " MACSTR " (aid %u)",
MAC2STR(sta->addr), sta->aid);
sta->flags |= WLAN_STA_WDS;
ret = hostapd_set_wds_sta(hapd, ifname_wds,
sta->addr, sta->aid, 1);
if (!ret)
hostapd_set_wds_encryption(hapd, sta,
ifname_wds);
}
return;
}
wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
MACSTR, MAC2STR(src));
if (src[0] & 0x01) {
/* Broadcast bit set in SA?! Ignore the frame silently. */
return;
}
if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
wpa_printf(MSG_DEBUG, "Association Response to the STA has "
"already been sent, but no TX status yet known - "
"ignore Class 3 frame issue with " MACSTR,
MAC2STR(src));
return;
}
if (sta && (sta->flags & WLAN_STA_AUTH))
hostapd_drv_sta_disassoc(
hapd, src,
WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
else
hostapd_drv_sta_deauth(
hapd, src,
WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
}
#endif /* CONFIG_NATIVE_WINDOWS */
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