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fragattacks/src/ap/ieee802_11.c
Johannes Berg 842c5af5d3 ap: Use is_broadcast_ether_addr() 
There's no need to have a separate variable and open-code a more
complicated version of this, just use is_broadcast_ether_addr().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-08-06 16:51:48 +03:00

3158 lines
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/*
* hostapd / IEEE 802.11 Management
* Copyright (c) 2002-2014, 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 "fst/fst.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 "pmksa_cache_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 "hw_features.h"
#include "ieee802_11.h"
#include "dfs.h"
#include "mbo_ap.h"
#include "rrm.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;
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;
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)
{
int capab = WLAN_CAPABILITY_ESS;
int privacy;
int dfs;
int i;
/* Check if any of configured channels require DFS */
dfs = hostapd_is_dfs_required(hapd->iface);
if (dfs < 0) {
wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
dfs);
dfs = 0;
}
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;
#ifdef CONFIG_HS20
if (hapd->conf->osen)
privacy = 1;
#endif /* CONFIG_HS20 */
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;
/*
* Currently, Spectrum Management capability bit is set when directly
* requested in configuration by spectrum_mgmt_required or when AP is
* running on DFS channel.
* TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
*/
if (hapd->iface->current_mode &&
hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
(hapd->iconf->spectrum_mgmt_required || dfs))
capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
if (hapd->conf->radio_measurements[i]) {
capab |= IEEE80211_CAP_RRM;
break;
}
}
return capab;
}
#ifndef CONFIG_NO_RC4
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];
sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
if (sta->challenge == NULL)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
if (os_get_random(key, sizeof(key)) < 0) {
os_free(sta->challenge);
sta->challenge = NULL;
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
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_const(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;
}
#endif /* CONFIG_NO_RC4 */
static int 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;
int reply_res = WLAN_STATUS_UNSPECIFIED_FAILURE;
rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
buf = os_zalloc(rlen);
if (buf == NULL)
return -1;
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 failed");
else
reply_res = WLAN_STATUS_SUCCESS;
os_free(buf);
return reply_res;
}
#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;
int reply_res;
reply_res = send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT,
auth_transaction, status, ies, ies_len);
sta = ap_get_sta(hapd, dst);
if (sta == NULL)
return;
if (sta->added_unassoc && (reply_res != WLAN_STATUS_SUCCESS ||
status != WLAN_STATUS_SUCCESS)) {
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
return;
}
if (status != WLAN_STATUS_SUCCESS)
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
#define dot11RSNASAESync 5 /* attempts */
static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd,
struct sta_info *sta, int update)
{
struct wpabuf *buf;
if (hapd->conf->ssid.wpa_passphrase == NULL) {
wpa_printf(MSG_DEBUG, "SAE: No password available");
return NULL;
}
if (update &&
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;
}
buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN);
if (buf == NULL)
return NULL;
sae_write_commit(sta->sae, buf, sta->sae->tmp ?
sta->sae->tmp->anti_clogging_token : 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 auth_sae_send_commit(struct hostapd_data *hapd,
struct sta_info *sta,
const u8 *bssid, int update)
{
struct wpabuf *data;
int reply_res;
data = auth_build_sae_commit(hapd, sta, update);
if (data == NULL)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 1,
WLAN_STATUS_SUCCESS, wpabuf_head(data),
wpabuf_len(data));
wpabuf_free(data);
return reply_res;
}
static int auth_sae_send_confirm(struct hostapd_data *hapd,
struct sta_info *sta,
const u8 *bssid)
{
struct wpabuf *data;
int reply_res;
data = auth_build_sae_confirm(hapd, sta);
if (data == NULL)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 2,
WLAN_STATUS_SUCCESS, wpabuf_head(data),
wpabuf_len(data));
wpabuf_free(data);
return reply_res;
}
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_const(token, mac, SHA256_MAC_LEN) != 0)
return -1;
return 0;
}
static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
int group, 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(sizeof(le16) + SHA256_MAC_LEN);
if (buf == NULL)
return NULL;
wpabuf_put_le16(buf, group); /* Finite Cyclic Group */
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 int sae_check_big_sync(struct sta_info *sta)
{
if (sta->sae->sync > dot11RSNASAESync) {
sta->sae->state = SAE_NOTHING;
sta->sae->sync = 0;
return -1;
}
return 0;
}
static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data)
{
struct hostapd_data *hapd = eloop_ctx;
struct sta_info *sta = eloop_data;
int ret;
if (sae_check_big_sync(sta))
return;
sta->sae->sync++;
wpa_printf(MSG_DEBUG, "SAE: Auth SAE retransmit timer for " MACSTR
" (sync=%d state=%d)",
MAC2STR(sta->addr), sta->sae->sync, sta->sae->state);
switch (sta->sae->state) {
case SAE_COMMITTED:
ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
eloop_register_timeout(0,
hapd->dot11RSNASAERetransPeriod * 1000,
auth_sae_retransmit_timer, hapd, sta);
break;
case SAE_CONFIRMED:
ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr);
eloop_register_timeout(0,
hapd->dot11RSNASAERetransPeriod * 1000,
auth_sae_retransmit_timer, hapd, sta);
break;
default:
ret = -1;
break;
}
if (ret != WLAN_STATUS_SUCCESS)
wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret);
}
void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta)
{
eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
}
static void sae_set_retransmit_timer(struct hostapd_data *hapd,
struct sta_info *sta)
{
if (!(hapd->conf->mesh & MESH_ENABLED))
return;
eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000,
auth_sae_retransmit_timer, hapd, sta);
}
void sae_accept_sta(struct hostapd_data *hapd, struct sta_info *sta)
{
sta->flags |= WLAN_STA_AUTH;
sta->auth_alg = WLAN_AUTH_SAE;
mlme_authenticate_indication(hapd, sta);
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
sta->sae->state = SAE_ACCEPTED;
wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr,
sta->sae->pmk, sta->sae->pmkid);
}
static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta,
const u8 *bssid, u8 auth_transaction)
{
int ret;
if (auth_transaction != 1 && auth_transaction != 2)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
switch (sta->sae->state) {
case SAE_NOTHING:
if (auth_transaction == 1) {
ret = auth_sae_send_commit(hapd, sta, bssid, 1);
if (ret)
return ret;
sta->sae->state = SAE_COMMITTED;
if (sae_process_commit(sta->sae) < 0)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
/*
* In mesh case, both Commit and Confirm can be sent
* immediately. In infrastructure BSS, only a single
* Authentication frame (Commit) is expected from the AP
* here and the second one (Confirm) will be sent once
* the STA has sent its second Authentication frame
* (Confirm).
*/
if (hapd->conf->mesh & MESH_ENABLED) {
/*
* Send both Commit and Confirm immediately
* based on SAE finite state machine
* Nothing -> Confirm transition.
*/
ret = auth_sae_send_confirm(hapd, sta, bssid);
if (ret)
return ret;
sta->sae->state = SAE_CONFIRMED;
} else {
/*
* For infrastructure BSS, send only the Commit
* message now to get alternating sequence of
* Authentication frames between the AP and STA.
* Confirm will be sent in
* Commited -> Confirmed/Accepted transition
* when receiving Confirm from STA.
*/
}
sta->sae->sync = 0;
sae_set_retransmit_timer(hapd, sta);
} else {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"SAE confirm before commit");
}
break;
case SAE_COMMITTED:
sae_clear_retransmit_timer(hapd, sta);
if (auth_transaction == 1) {
if (sae_process_commit(sta->sae) < 0)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
ret = auth_sae_send_confirm(hapd, sta, bssid);
if (ret)
return ret;
sta->sae->state = SAE_CONFIRMED;
sta->sae->sync = 0;
sae_set_retransmit_timer(hapd, sta);
} else if (hapd->conf->mesh & MESH_ENABLED) {
/*
* In mesh case, follow SAE finite state machine and
* send Commit now, if sync count allows.
*/
if (sae_check_big_sync(sta))
return WLAN_STATUS_SUCCESS;
sta->sae->sync++;
ret = auth_sae_send_commit(hapd, sta, bssid, 0);
if (ret)
return ret;
sae_set_retransmit_timer(hapd, sta);
} else {
/*
* For instructure BSS, send the postponed Confirm from
* Nothing -> Confirmed transition that was reduced to
* Nothing -> Committed above.
*/
ret = auth_sae_send_confirm(hapd, sta, bssid);
if (ret)
return ret;
sta->sae->state = SAE_CONFIRMED;
/*
* Since this was triggered on Confirm RX, run another
* step to get to Accepted without waiting for
* additional events.
*/
return sae_sm_step(hapd, sta, bssid, auth_transaction);
}
break;
case SAE_CONFIRMED:
sae_clear_retransmit_timer(hapd, sta);
if (auth_transaction == 1) {
if (sae_check_big_sync(sta))
return WLAN_STATUS_SUCCESS;
sta->sae->sync++;
ret = auth_sae_send_commit(hapd, sta, bssid, 1);
if (ret)
return ret;
if (sae_process_commit(sta->sae) < 0)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
ret = auth_sae_send_confirm(hapd, sta, bssid);
if (ret)
return ret;
sae_set_retransmit_timer(hapd, sta);
} else {
sae_accept_sta(hapd, sta);
}
break;
case SAE_ACCEPTED:
if (auth_transaction == 1) {
wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR
") doing reauthentication",
MAC2STR(sta->addr));
ap_free_sta(hapd, sta);
wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
} else {
if (sae_check_big_sync(sta))
return WLAN_STATUS_SUCCESS;
sta->sae->sync++;
ret = auth_sae_send_confirm(hapd, sta, bssid);
sae_clear_temp_data(sta->sae);
if (ret)
return ret;
}
break;
default:
wpa_printf(MSG_ERROR, "SAE: invalid state %d",
sta->sae->state);
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
return WLAN_STATUS_SUCCESS;
}
static void sae_pick_next_group(struct hostapd_data *hapd, struct sta_info *sta)
{
struct sae_data *sae = sta->sae;
int i, *groups = hapd->conf->sae_groups;
if (sae->state != SAE_COMMITTED)
return;
wpa_printf(MSG_DEBUG, "SAE: Previously selected group: %d", sae->group);
for (i = 0; groups && groups[i] > 0; i++) {
if (sae->group == groups[i])
break;
}
if (!groups || groups[i] <= 0) {
wpa_printf(MSG_DEBUG,
"SAE: Previously selected group not found from the current configuration");
return;
}
for (;;) {
i++;
if (groups[i] <= 0) {
wpa_printf(MSG_DEBUG,
"SAE: No alternative group enabled");
return;
}
if (sae_set_group(sae, groups[i]) < 0)
continue;
break;
}
wpa_printf(MSG_DEBUG, "SAE: Selected new group: %d", groups[i]);
}
static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
const struct ieee80211_mgmt *mgmt, size_t len,
u16 auth_transaction, u16 status_code)
{
int resp = WLAN_STATUS_SUCCESS;
struct wpabuf *data = NULL;
if (!sta->sae) {
if (auth_transaction != 1 ||
status_code != WLAN_STATUS_SUCCESS) {
resp = -1;
goto remove_sta;
}
sta->sae = os_zalloc(sizeof(*sta->sae));
if (!sta->sae) {
resp = -1;
goto remove_sta;
}
sta->sae->state = SAE_NOTHING;
sta->sae->sync = 0;
}
if (sta->mesh_sae_pmksa_caching) {
wpa_printf(MSG_DEBUG,
"SAE: Cancel use of mesh PMKSA caching because peer starts SAE authentication");
wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
sta->mesh_sae_pmksa_caching = 0;
}
if (auth_transaction == 1) {
const u8 *token = NULL, *pos, *end;
size_t token_len = 0;
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"start SAE authentication (RX commit, status=%u)",
status_code);
if ((hapd->conf->mesh & MESH_ENABLED) &&
status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
sta->sae->tmp) {
pos = mgmt->u.auth.variable;
end = ((const u8 *) mgmt) + len;
if (pos + sizeof(le16) > end) {
wpa_printf(MSG_ERROR,
"SAE: Too short anti-clogging token request");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto reply;
}
resp = sae_group_allowed(sta->sae,
hapd->conf->sae_groups,
WPA_GET_LE16(pos));
if (resp != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_ERROR,
"SAE: Invalid group in anti-clogging token request");
goto reply;
}
pos += sizeof(le16);
wpabuf_free(sta->sae->tmp->anti_clogging_token);
sta->sae->tmp->anti_clogging_token =
wpabuf_alloc_copy(pos, end - pos);
if (sta->sae->tmp->anti_clogging_token == NULL) {
wpa_printf(MSG_ERROR,
"SAE: Failed to alloc for anti-clogging token");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto remove_sta;
}
/*
* IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code
* is 76, a new Commit Message shall be constructed
* with the Anti-Clogging Token from the received
* Authentication frame, and the commit-scalar and
* COMMIT-ELEMENT previously sent.
*/
resp = auth_sae_send_commit(hapd, sta, mgmt->bssid, 0);
if (resp != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_ERROR,
"SAE: Failed to send commit message");
goto remove_sta;
}
sta->sae->state = SAE_COMMITTED;
sta->sae->sync = 0;
sae_set_retransmit_timer(hapd, sta);
return;
}
if ((hapd->conf->mesh & MESH_ENABLED) &&
status_code ==
WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
sta->sae->tmp) {
wpa_printf(MSG_DEBUG,
"SAE: Peer did not accept our SAE group");
sae_pick_next_group(hapd, sta);
goto remove_sta;
}
if (status_code != WLAN_STATUS_SUCCESS)
goto remove_sta;
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 (resp == SAE_SILENTLY_DISCARD) {
wpa_printf(MSG_DEBUG,
"SAE: Drop commit message from " MACSTR " due to reflection attack",
MAC2STR(sta->addr));
goto remove_sta;
}
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));
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto remove_sta;
}
if (resp != WLAN_STATUS_SUCCESS)
goto reply;
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->sae->group,
sta->addr);
resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
if (hapd->conf->mesh & MESH_ENABLED)
sta->sae->state = SAE_NOTHING;
goto reply;
}
resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
} else if (auth_transaction == 2) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"SAE authentication (RX confirm, status=%u)",
status_code);
if (status_code != WLAN_STATUS_SUCCESS)
goto remove_sta;
if (sta->sae->state >= SAE_CONFIRMED ||
!(hapd->conf->mesh & MESH_ENABLED)) {
if (sae_check_confirm(sta->sae, mgmt->u.auth.variable,
((u8 *) mgmt) + len -
mgmt->u.auth.variable) < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto reply;
}
}
resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
} else {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"unexpected SAE authentication transaction %u (status=%u)",
auth_transaction, status_code);
if (status_code != WLAN_STATUS_SUCCESS)
goto remove_sta;
resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
}
reply:
if (resp != WLAN_STATUS_SUCCESS) {
send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
auth_transaction, resp,
data ? wpabuf_head(data) : (u8 *) "",
data ? wpabuf_len(data) : 0);
}
remove_sta:
if (sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
status_code != WLAN_STATUS_SUCCESS)) {
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
}
wpabuf_free(data);
}
/**
* auth_sae_init_committed - Send COMMIT and start SAE in committed state
* @hapd: BSS data for the device initiating the authentication
* @sta: the peer to which commit authentication frame is sent
*
* This function implements Init event handling (IEEE Std 802.11-2012,
* 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the
* sta->sae structure should be initialized appropriately via a call to
* sae_prepare_commit().
*/
int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta)
{
int ret;
if (!sta->sae || !sta->sae->tmp)
return -1;
if (sta->sae->state != SAE_NOTHING)
return -1;
ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
if (ret)
return -1;
sta->sae->state = SAE_COMMITTED;
sta->sae->sync = 0;
sae_set_retransmit_timer(hapd, sta);
return 0;
}
#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, reply_res;
u16 fc;
const u8 *challenge = NULL;
u32 session_timeout, acct_interim_interval;
struct vlan_description vlan_id;
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;
u16 seq_ctrl;
os_memset(&vlan_id, 0, sizeof(vlan_id));
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 > 0.0 &&
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);
seq_ctrl = le_to_host16(mgmt->seq_ctrl);
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 "
"seq_ctrl=0x%x%s",
MAC2STR(mgmt->sa), auth_alg, auth_transaction,
status_code, !!(fc & WLAN_FC_ISWEP),
challenge ? " challenge" : "",
seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
#ifdef CONFIG_NO_RC4
if (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;
}
#endif /* CONFIG_NO_RC4 */
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;
}
if (hapd->conf->no_auth_if_seen_on) {
struct hostapd_data *other;
other = sta_track_seen_on(hapd->iface, mgmt->sa,
hapd->conf->no_auth_if_seen_on);
if (other) {
u8 *pos;
u32 info;
u8 op_class, channel, phytype;
wpa_printf(MSG_DEBUG, "%s: Reject authentication from "
MACSTR " since STA has been seen on %s",
hapd->conf->iface, MAC2STR(mgmt->sa),
hapd->conf->no_auth_if_seen_on);
resp = WLAN_STATUS_REJECTED_WITH_SUGGESTED_BSS_TRANSITION;
pos = &resp_ies[0];
*pos++ = WLAN_EID_NEIGHBOR_REPORT;
*pos++ = 13;
os_memcpy(pos, other->own_addr, ETH_ALEN);
pos += ETH_ALEN;
info = 0; /* TODO: BSSID Information */
WPA_PUT_LE32(pos, info);
pos += 4;
if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD)
phytype = 8; /* dmg */
else if (other->iconf->ieee80211ac)
phytype = 9; /* vht */
else if (other->iconf->ieee80211n)
phytype = 7; /* ht */
else if (other->iconf->hw_mode ==
HOSTAPD_MODE_IEEE80211A)
phytype = 4; /* ofdm */
else if (other->iconf->hw_mode ==
HOSTAPD_MODE_IEEE80211G)
phytype = 6; /* erp */
else
phytype = 5; /* hrdsss */
if (ieee80211_freq_to_channel_ext(
hostapd_hw_get_freq(other,
other->iconf->channel),
other->iconf->secondary_channel,
other->iconf->ieee80211ac,
&op_class, &channel) == NUM_HOSTAPD_MODES) {
op_class = 0;
channel = other->iconf->channel;
}
*pos++ = op_class;
*pos++ = channel;
*pos++ = phytype;
resp_ies_len = pos - &resp_ies[0];
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_get_sta(hapd, mgmt->sa);
if (sta) {
if ((fc & WLAN_FC_RETRY) &&
sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
sta->last_seq_ctrl == seq_ctrl &&
sta->last_subtype == WLAN_FC_STYPE_AUTH) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"Drop repeated authentication frame seq_ctrl=0x%x",
seq_ctrl);
return;
}
#ifdef CONFIG_MESH
if ((hapd->conf->mesh & MESH_ENABLED) &&
sta->plink_state == PLINK_BLOCKED) {
wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
" is blocked - drop Authentication frame",
MAC2STR(mgmt->sa));
return;
}
#endif /* CONFIG_MESH */
} else {
#ifdef CONFIG_MESH
if (hapd->conf->mesh & MESH_ENABLED) {
/* if the mesh peer is not available, we don't do auth.
*/
wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
" not yet known - drop Authentication frame",
MAC2STR(mgmt->sa));
/*
* Save a copy of the frame so that it can be processed
* if a new peer entry is added shortly after this.
*/
wpabuf_free(hapd->mesh_pending_auth);
hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len);
os_get_reltime(&hapd->mesh_pending_auth_time);
return;
}
#endif /* CONFIG_MESH */
sta = ap_sta_add(hapd, mgmt->sa);
if (!sta) {
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto fail;
}
}
sta->last_seq_ctrl = seq_ctrl;
sta->last_subtype = WLAN_FC_STYPE_AUTH;
if (vlan_id.notempty &&
!hostapd_vlan_valid(hapd->conf->vlan, &vlan_id)) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_INFO,
"Invalid VLAN %d%s received from RADIUS server",
vlan_id.untagged,
vlan_id.tagged[0] ? "+" : "");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (ap_sta_set_vlan(hapd, sta, &vlan_id) < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (sta->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);
/*
* If the driver supports full AP client state, add a station to the
* driver before sending authentication reply to make sure the driver
* has resources, and not to go through the entire authentication and
* association handshake, and fail it at the end.
*
* If this is not the first transaction, in a multi-step authentication
* algorithm, the station already exists in the driver
* (sta->added_unassoc = 1) so skip it.
*
* In mesh mode, the station was already added to the driver when the
* NEW_PEER_CANDIDATE event is received.
*/
if (FULL_AP_CLIENT_STATE_SUPP(hapd->iface->drv_flags) &&
!(hapd->conf->mesh & MESH_ENABLED) &&
!(sta->added_unassoc)) {
/*
* If a station that is already associated to the AP, is trying
* to authenticate again, remove the STA entry, in order to make
* sure the STA PS state gets cleared and configuration gets
* updated. To handle this, station's added_unassoc flag is
* cleared once the station has completed association.
*/
hostapd_drv_sta_remove(hapd, sta->addr);
sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_AUTH |
WLAN_STA_AUTHORIZED);
if (hostapd_sta_add(hapd, sta->addr, 0, 0, NULL, 0, 0,
NULL, NULL, sta->flags, 0, 0, 0, 0)) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_NOTICE,
"Could not add STA to kernel driver");
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto fail;
}
sta->added_unassoc = 1;
}
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;
#ifndef CONFIG_NO_RC4
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;
#endif /* CONFIG_NO_RC4 */
#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:
#ifdef CONFIG_MESH
if (status_code == WLAN_STATUS_SUCCESS &&
hapd->conf->mesh & MESH_ENABLED) {
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,
"SAE: Failed to initialize WPA state machine");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
}
#endif /* CONFIG_MESH */
handle_auth_sae(hapd, sta, mgmt, len, auth_transaction,
status_code);
return;
#endif /* CONFIG_SAE */
}
fail:
os_free(identity);
os_free(radius_cui);
hostapd_free_psk_list(psk);
reply_res = send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
auth_transaction + 1, resp, resp_ies,
resp_ies_len);
if (sta && sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
reply_res != WLAN_STATUS_SUCCESS)) {
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
}
}
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;
}
if (TEST_FAIL())
return -1;
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) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO,
"Station tried to associate with unknown SSID "
"'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
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 */
if (ext_capab_ie_len > 0)
sta->ecsa_supported = !!(ext_capab_ie[0] & BIT(2));
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);
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
if (hapd->iconf->ieee80211ac) {
resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities);
if (resp != WLAN_STATUS_SUCCESS)
return resp;
resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
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;
}
if (hapd->conf->vendor_vht && !elems.vht_capabilities) {
resp = copy_sta_vendor_vht(hapd, sta, elems.vendor_vht,
elems.vendor_vht_len);
if (resp != WLAN_STATUS_SUCCESS)
return resp;
}
#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_OPEN) {
struct rsn_pmksa_cache_entry *sa;
sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) {
wpa_printf(MSG_DEBUG,
"SAE: No PMKSA cache entry found for "
MACSTR, MAC2STR(sta->addr));
return WLAN_STATUS_INVALID_PMKID;
}
wpa_printf(MSG_DEBUG, "SAE: " MACSTR
" using PMKSA caching", MAC2STR(sta->addr));
} else 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 */
#ifdef CONFIG_HS20
} else if (hapd->conf->osen) {
if (elems.osen == NULL) {
hostapd_logger(
hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO,
"No HS 2.0 OSEN element in association request");
return WLAN_STATUS_INVALID_IE;
}
wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
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_WARNING, "Failed to initialize WPA "
"state machine");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
elems.osen - 2, elems.osen_len + 2) < 0)
return WLAN_STATUS_INVALID_IE;
#endif /* CONFIG_HS20 */
} 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 */
#ifdef CONFIG_FST
wpabuf_free(sta->mb_ies);
if (hapd->iface->fst)
sta->mb_ies = mb_ies_by_info(&elems.mb_ies);
else
sta->mb_ies = NULL;
#endif /* CONFIG_FST */
#ifdef CONFIG_MBO
mbo_ap_check_sta_assoc(hapd, sta, &elems);
if (hapd->conf->mbo_enabled && (hapd->conf->wpa & 2) &&
elems.mbo && sta->cell_capa && !(sta->flags & WLAN_STA_MFP) &&
hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
wpa_printf(MSG_INFO,
"MBO: Reject WPA2 association without PMF");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
#endif /* CONFIG_MBO */
ap_copy_sta_supp_op_classes(sta, elems.supp_op_classes,
elems.supp_op_classes_len);
if ((sta->capability & WLAN_CAPABILITY_RADIO_MEASUREMENT) &&
elems.rrm_enabled &&
elems.rrm_enabled_len >= sizeof(sta->rrm_enabled_capa))
os_memcpy(sta->rrm_enabled_capa, elems.rrm_enabled,
sizeof(sta->rrm_enabled_capa));
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 int add_associated_sta(struct hostapd_data *hapd,
struct sta_info *sta)
{
struct ieee80211_ht_capabilities ht_cap;
struct ieee80211_vht_capabilities vht_cap;
/*
* Remove the STA entry to ensure the STA PS state gets cleared and
* configuration gets updated. This is relevant for cases, such as
* FT-over-the-DS, where a station re-associates back to the same AP but
* skips the authentication flow, or if working with a driver that
* does not support full AP client state.
*/
if (!sta->added_unassoc)
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 */
/*
* Add the station with forced WLAN_STA_ASSOC flag. The sta->flags
* will be set when the ACK frame for the (Re)Association Response frame
* is processed (TX status driver event).
*/
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 | WLAN_STA_ASSOC, sta->qosinfo,
sta->vht_opmode, sta->p2p_ie ? 1 : 0,
sta->added_unassoc)) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE,
"Could not %s STA to kernel driver",
sta->added_unassoc ? "set" : "add");
if (sta->added_unassoc) {
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
}
return -1;
}
sta->added_unassoc = 0;
return 0;
}
static u16 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));
reply->u.assoc_resp.status_code = host_to_le16(status_code);
reply->u.assoc_resp.aid = host_to_le16(sta->aid | 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
if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
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);
#ifdef CONFIG_FST
if (hapd->iface->fst_ies) {
os_memcpy(p, wpabuf_head(hapd->iface->fst_ies),
wpabuf_len(hapd->iface->fst_ies));
p += wpabuf_len(hapd->iface->fst_ies);
}
#endif /* CONFIG_FST */
#ifdef CONFIG_IEEE80211AC
if (hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT))
p = hostapd_eid_vendor_vht(hapd, p);
#endif /* CONFIG_IEEE80211AC */
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 && hapd->p2p_group) {
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 */
p = hostapd_eid_mbo(hapd, p, buf + sizeof(buf) - p);
if (hapd->conf->assocresp_elements &&
(size_t) (buf + sizeof(buf) - p) >=
wpabuf_len(hapd->conf->assocresp_elements)) {
os_memcpy(p, wpabuf_head(hapd->conf->assocresp_elements),
wpabuf_len(hapd->conf->assocresp_elements));
p += wpabuf_len(hapd->conf->assocresp_elements);
}
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));
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
return WLAN_STATUS_SUCCESS;
}
static void handle_assoc(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt, size_t len,
int reassoc)
{
u16 capab_info, listen_interval, seq_ctrl, fc;
u16 resp = WLAN_STATUS_SUCCESS, reply_res;
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 > 0.0 &&
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 > 0.0 &&
drand48() < hapd->iconf->ignore_assoc_probability) {
wpa_printf(MSG_INFO,
"TESTING: ignoring assoc request from "
MACSTR, MAC2STR(mgmt->sa));
return;
}
}
#endif /* CONFIG_TESTING_OPTIONS */
fc = le_to_host16(mgmt->frame_control);
seq_ctrl = le_to_host16(mgmt->seq_ctrl);
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 " seq_ctrl=0x%x%s",
MAC2STR(mgmt->sa), capab_info, listen_interval,
MAC2STR(mgmt->u.reassoc_req.current_ap),
seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
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 "
"seq_ctrl=0x%x%s",
MAC2STR(mgmt->sa), capab_info, listen_interval,
seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
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));
/*
* Mark station as authenticated, to avoid adding station
* entry in the driver as associated and not authenticated
*/
sta->flags |= WLAN_STA_AUTH;
} 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 ((fc & WLAN_FC_RETRY) &&
sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
sta->last_seq_ctrl == seq_ctrl &&
sta->last_subtype == reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
WLAN_FC_STYPE_ASSOC_REQ) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"Drop repeated association frame seq_ctrl=0x%x",
seq_ctrl);
return;
}
sta->last_seq_ctrl = seq_ctrl;
sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
WLAN_FC_STYPE_ASSOC_REQ;
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;
}
#ifdef CONFIG_MBO
if (hapd->conf->mbo_enabled && hapd->mbo_assoc_disallow) {
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto fail;
}
#endif /* CONFIG_MBO */
/*
* sta->capability is used in check_assoc_ies() for RRM enabled
* capability element.
*/
sta->capability = capab_info;
/* 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->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 */
/* Make sure that the previously registered inactivity timer will not
* remove the STA immediately. */
sta->timeout_next = STA_NULLFUNC;
fail:
/*
* In case of a successful response, add the station to the driver.
* Otherwise, the kernel may ignore Data frames before we process the
* ACK frame (TX status). In case of a failure, this station will be
* removed.
*
* Note that this is not compliant with the IEEE 802.11 standard that
* states that a non-AP station should transition into the
* authenticated/associated state only after the station acknowledges
* the (Re)Association Response frame. However, still do this as:
*
* 1. In case the station does not acknowledge the (Re)Association
* Response frame, it will be removed.
* 2. Data frames will be dropped in the kernel until the station is
* set into authorized state, and there are no significant known
* issues with processing other non-Data Class 3 frames during this
* window.
*/
if (resp == WLAN_STATUS_SUCCESS && add_associated_sta(hapd, sta))
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
reply_res = send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
/*
* Remove the station in case tranmission of a success response fails
* (the STA was added associated to the driver) or if the station was
* previously added unassociated.
*/
if ((reply_res != WLAN_STATUS_SUCCESS &&
resp == WLAN_STATUS_SUCCESS) || sta->added_unassoc) {
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
}
}
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->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
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(hapd, sta);
if (sta->ipaddr)
hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr);
ap_sta_ip6addr_del(hapd, sta);
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
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->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
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 */
if (sta) {
u16 fc = le_to_host16(mgmt->frame_control);
u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
if ((fc & WLAN_FC_RETRY) &&
sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
sta->last_seq_ctrl == seq_ctrl &&
sta->last_subtype == WLAN_FC_STYPE_ACTION) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"Drop repeated action frame seq_ctrl=0x%x",
seq_ctrl);
return 1;
}
sta->last_seq_ctrl = seq_ctrl;
sta->last_subtype = WLAN_FC_STYPE_ACTION;
}
switch (mgmt->u.action.category) {
#ifdef CONFIG_IEEE80211R
case WLAN_ACTION_FT:
if (!sta ||
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 */
#ifdef CONFIG_FST
case WLAN_ACTION_FST:
if (hapd->iface->fst)
fst_rx_action(hapd->iface->fst, mgmt, len);
else
wpa_printf(MSG_DEBUG,
"FST: Ignore FST Action frame - no FST attached");
return 1;
#endif /* CONFIG_FST */
case WLAN_ACTION_PUBLIC:
case WLAN_ACTION_PROTECTED_DUAL:
#ifdef CONFIG_IEEE80211N
if (len >= IEEE80211_HDRLEN + 2 &&
mgmt->u.action.u.public_action.action ==
WLAN_PA_20_40_BSS_COEX) {
wpa_printf(MSG_DEBUG,
"HT20/40 coex mgmt frame received from STA "
MACSTR, MAC2STR(mgmt->sa));
hostapd_2040_coex_action(hapd, mgmt, len);
}
#endif /* CONFIG_IEEE80211N */
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;
case WLAN_ACTION_RADIO_MEASUREMENT:
hostapd_handle_radio_measurement(hapd, (const u8 *) mgmt, len);
return 1;
}
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;
u16 fc, stype;
int ret = 0;
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;
}
if (!is_broadcast_ether_addr(mgmt->bssid) &&
#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 */
#ifdef CONFIG_MESH
!(hapd->conf->mesh & MESH_ENABLED) &&
#endif /* CONFIG_MESH */
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;
}
if (hapd->iconf->track_sta_max_num)
sta_track_add(hapd->iface, mgmt->sa);
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;
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found",
MAC2STR(mgmt->da));
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);
if (!ok) {
hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_NOTICE,
"did not acknowledge authentication response");
goto fail;
}
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
(unsigned long) len);
goto fail;
}
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;
if (sta->added_unassoc)
hostapd_set_sta_flags(hapd, sta);
return;
}
fail:
if (status_code != WLAN_STATUS_SUCCESS && sta->added_unassoc) {
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
}
}
static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
struct sta_info *sta,
char *ifname_wds)
{
int i;
struct hostapd_ssid *ssid = &hapd->conf->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;
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 (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);
hostapd_drv_sta_remove(hapd, sta->addr);
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 (!ok) {
hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"did not acknowledge association response");
sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
/* The STA is added only in case of SUCCESS */
if (status == WLAN_STATUS_SUCCESS)
hostapd_drv_sta_remove(hapd, sta->addr);
return;
}
if (status != WLAN_STATUS_SUCCESS)
return;
/* 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 && !hapd->conf->osen) ||
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 */
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)
return;
} 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)
return;
}
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);
if (sta->pending_eapol_rx) {
struct os_reltime now, age;
os_get_reltime(&now);
os_reltime_sub(&now, &sta->pending_eapol_rx->rx_time, &age);
if (age.sec == 0 && age.usec < 200000) {
wpa_printf(MSG_DEBUG,
"Process pending EAPOL frame that was received from " MACSTR " just before association notification",
MAC2STR(sta->addr));
ieee802_1x_receive(
hapd, mgmt->da,
wpabuf_head(sta->pending_eapol_rx->buf),
wpabuf_len(sta->pending_eapol_rx->buf));
}
wpabuf_free(sta->pending_eapol_rx->buf);
os_free(sta->pending_eapol_rx);
sta->pending_eapol_rx = 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 ok=%d", ok);
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 ok=%d", ok);
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;
wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_POLL_OK MACSTR,
MAC2STR(sta->addr));
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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