fragattacks/src/ap/ieee802_11.c

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/*
* hostapd / IEEE 802.11 Management
* Copyright (c) 2002-2017, 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"
#include "taxonomy.h"
#include "fils_hlp.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_AP
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_AP */
#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
* Committed -> 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 u16 wpa_res_to_status_code(int res)
{
if (res == WPA_INVALID_GROUP)
return WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
if (res == WPA_INVALID_PAIRWISE)
return WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
if (res == WPA_INVALID_AKMP)
return WLAN_STATUS_AKMP_NOT_VALID;
if (res == WPA_ALLOC_FAIL)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
#ifdef CONFIG_IEEE80211W
if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
#endif /* CONFIG_IEEE80211W */
if (res == WPA_INVALID_MDIE)
return WLAN_STATUS_INVALID_MDIE;
if (res != WPA_IE_OK)
return WLAN_STATUS_INVALID_IE;
return WLAN_STATUS_SUCCESS;
}
#ifdef CONFIG_FILS
static void handle_auth_fils_finish(struct hostapd_data *hapd,
struct sta_info *sta, u16 resp,
struct rsn_pmksa_cache_entry *pmksa,
struct wpabuf *erp_resp,
const u8 *msk, size_t msk_len);
static void handle_auth_fils(struct hostapd_data *hapd, struct sta_info *sta,
const struct ieee80211_mgmt *mgmt, size_t len,
u16 auth_alg, u16 auth_transaction,
u16 status_code)
{
u16 resp = WLAN_STATUS_SUCCESS;
const u8 *pos, *end;
struct ieee802_11_elems elems;
int res;
struct wpa_ie_data rsn;
struct rsn_pmksa_cache_entry *pmksa = NULL;
if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS)
return;
pos = mgmt->u.auth.variable;
end = ((const u8 *) mgmt) + len;
wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields",
pos, end - pos);
/* TODO: FILS PK */
#ifdef CONFIG_FILS_SK_PFS
if (auth_alg == WLAN_AUTH_FILS_SK_PFS) {
u16 group;
struct wpabuf *pub;
size_t elem_len;
/* Using FILS PFS */
/* Finite Cyclic Group */
if (end - pos < 2) {
wpa_printf(MSG_DEBUG,
"FILS: No room for Finite Cyclic Group");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
group = WPA_GET_LE16(pos);
pos += 2;
if (group != hapd->conf->fils_dh_group) {
wpa_printf(MSG_DEBUG,
"FILS: Unsupported Finite Cyclic Group: %u (expected %u)",
group, hapd->conf->fils_dh_group);
resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
goto fail;
}
crypto_ecdh_deinit(sta->fils_ecdh);
sta->fils_ecdh = crypto_ecdh_init(group);
if (!sta->fils_ecdh) {
wpa_printf(MSG_INFO,
"FILS: Could not initialize ECDH with group %d",
group);
resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
goto fail;
}
pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
if (!pub) {
wpa_printf(MSG_DEBUG,
"FILS: Failed to derive ECDH public key");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
elem_len = wpabuf_len(pub);
wpabuf_free(pub);
/* Element */
if ((size_t) (end - pos) < elem_len) {
wpa_printf(MSG_DEBUG, "FILS: No room for Element");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
wpabuf_clear_free(sta->fils_dh_ss);
sta->fils_dh_ss = crypto_ecdh_set_peerkey(sta->fils_ecdh, 1,
pos, elem_len);
if (!sta->fils_dh_ss) {
wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", sta->fils_dh_ss);
pos += elem_len;
} else {
crypto_ecdh_deinit(sta->fils_ecdh);
sta->fils_ecdh = NULL;
wpabuf_clear_free(sta->fils_dh_ss);
sta->fils_dh_ss = NULL;
}
#endif /* CONFIG_FILS_SK_PFS */
wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos);
if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) {
wpa_printf(MSG_DEBUG, "FILS: Could not parse elements");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
/* RSNE */
wpa_hexdump(MSG_DEBUG, "FILS: RSN element",
elems.rsn_ie, elems.rsn_ie_len);
if (!elems.rsn_ie ||
wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
&rsn) < 0) {
wpa_printf(MSG_DEBUG, "FILS: No valid RSN element");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (!sta->wpa_sm)
sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr,
NULL);
if (!sta->wpa_sm) {
wpa_printf(MSG_DEBUG,
"FILS: Failed to initialize RSN state machine");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
elems.rsn_ie - 2, elems.rsn_ie_len + 2,
elems.mdie, elems.mdie_len, NULL, 0);
resp = wpa_res_to_status_code(res);
if (resp != WLAN_STATUS_SUCCESS)
goto fail;
if (!elems.fils_nonce) {
wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
wpa_hexdump(MSG_DEBUG, "FILS: SNonce", elems.fils_nonce,
FILS_NONCE_LEN);
os_memcpy(sta->fils_snonce, elems.fils_nonce, FILS_NONCE_LEN);
/* PMKID List */
if (rsn.pmkid && rsn.num_pmkid > 0) {
u8 num;
const u8 *pmkid;
wpa_hexdump(MSG_DEBUG, "FILS: PMKID List",
rsn.pmkid, rsn.num_pmkid * PMKID_LEN);
pmkid = rsn.pmkid;
num = rsn.num_pmkid;
while (num) {
wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN);
pmksa = wpa_auth_pmksa_get(hapd->wpa_auth, sta->addr,
pmkid);
if (pmksa)
break;
pmksa = wpa_auth_pmksa_get_fils_cache_id(hapd->wpa_auth,
sta->addr,
pmkid);
if (pmksa)
break;
pmkid += PMKID_LEN;
num--;
}
}
if (pmksa && wpa_auth_sta_key_mgmt(sta->wpa_sm) != pmksa->akmp) {
wpa_printf(MSG_DEBUG,
"FILS: Matching PMKSA cache entry has different AKMP (0x%x != 0x%x) - ignore",
wpa_auth_sta_key_mgmt(sta->wpa_sm), pmksa->akmp);
pmksa = NULL;
}
if (pmksa)
wpa_printf(MSG_DEBUG, "FILS: Found matching PMKSA cache entry");
/* FILS Session */
if (!elems.fils_session) {
wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session,
FILS_SESSION_LEN);
os_memcpy(sta->fils_session, elems.fils_session, FILS_SESSION_LEN);
/* FILS Wrapped Data */
if (elems.fils_wrapped_data) {
wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data",
elems.fils_wrapped_data,
elems.fils_wrapped_data_len);
if (!pmksa) {
#ifndef CONFIG_NO_RADIUS
if (!sta->eapol_sm) {
sta->eapol_sm =
ieee802_1x_alloc_eapol_sm(hapd, sta);
}
wpa_printf(MSG_DEBUG,
"FILS: Forward EAP-Identity/Re-auth Start to authentication server");
ieee802_1x_encapsulate_radius(
hapd, sta, elems.fils_wrapped_data,
elems.fils_wrapped_data_len);
wpa_printf(MSG_DEBUG,
"FILS: Will send Authentication frame once the response from authentication server is available");
sta->flags |= WLAN_STA_PENDING_FILS_ERP;
return;
#else /* CONFIG_NO_RADIUS */
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
#endif /* CONFIG_NO_RADIUS */
}
}
fail:
handle_auth_fils_finish(hapd, sta, resp, pmksa, NULL, NULL, 0);
}
static void handle_auth_fils_finish(struct hostapd_data *hapd,
struct sta_info *sta, u16 resp,
struct rsn_pmksa_cache_entry *pmksa,
struct wpabuf *erp_resp,
const u8 *msk, size_t msk_len)
{
u8 fils_nonce[FILS_NONCE_LEN];
size_t ielen;
struct wpabuf *data = NULL;
const u8 *ie;
u8 *ie_buf = NULL;
const u8 *pmk = NULL;
size_t pmk_len = 0;
u8 pmk_buf[PMK_LEN_MAX];
struct wpabuf *pub = NULL;
u16 auth_alg;
if (resp != WLAN_STATUS_SUCCESS)
goto fail;
ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
if (!ie) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (pmksa) {
/* Add PMKID of the selected PMKSA into RSNE */
ie_buf = os_malloc(ielen + 2 + 2 + PMKID_LEN);
if (!ie_buf) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
os_memcpy(ie_buf, ie, ielen);
if (wpa_insert_pmkid(ie_buf, &ielen, pmksa->pmkid) < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
ie = ie_buf;
}
if (random_get_bytes(fils_nonce, FILS_NONCE_LEN) < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
wpa_hexdump(MSG_DEBUG, "RSN: Generated FILS Nonce",
fils_nonce, FILS_NONCE_LEN);
#ifdef CONFIG_FILS_SK_PFS
if (sta->fils_dh_ss && sta->fils_ecdh) {
pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
if (!pub) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
}
#endif /* CONFIG_FILS_SK_PFS */
data = wpabuf_alloc(1000 + ielen + (pub ? wpabuf_len(pub) : 0));
if (!data) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
/* TODO: FILS PK */
#ifdef CONFIG_FILS_SK_PFS
if (pub) {
/* Finite Cyclic Group */
wpabuf_put_le16(data, hapd->conf->fils_dh_group);
/* Element */
wpabuf_put_buf(data, pub);
}
#endif /* CONFIG_FILS_SK_PFS */
/* RSNE */
wpabuf_put_data(data, ie, ielen);
/* MDE when using FILS+FT (already included in ie,ielen with RSNE) */
#ifdef CONFIG_IEEE80211R_AP
if (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm))) {
/* FTE[R1KH-ID,R0KH-ID] when using FILS+FT */
int res;
res = wpa_auth_write_fte(hapd->wpa_auth, wpabuf_put(data, 0),
wpabuf_tailroom(data));
if (res < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
wpabuf_put(data, res);
}
#endif /* CONFIG_IEEE80211R_AP */
/* FILS Nonce */
wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
wpabuf_put_u8(data, 1 + FILS_NONCE_LEN); /* Length */
/* Element ID Extension */
wpabuf_put_u8(data, WLAN_EID_EXT_FILS_NONCE);
wpabuf_put_data(data, fils_nonce, FILS_NONCE_LEN);
/* FILS Session */
wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
wpabuf_put_u8(data, 1 + FILS_SESSION_LEN); /* Length */
/* Element ID Extension */
wpabuf_put_u8(data, WLAN_EID_EXT_FILS_SESSION);
wpabuf_put_data(data, sta->fils_session, FILS_SESSION_LEN);
/* FILS Wrapped Data */
if (!pmksa && erp_resp) {
wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
wpabuf_put_u8(data, 1 + wpabuf_len(erp_resp)); /* Length */
/* Element ID Extension */
wpabuf_put_u8(data, WLAN_EID_EXT_FILS_WRAPPED_DATA);
wpabuf_put_buf(data, erp_resp);
if (fils_rmsk_to_pmk(wpa_auth_sta_key_mgmt(sta->wpa_sm),
msk, msk_len, sta->fils_snonce, fils_nonce,
sta->fils_dh_ss ?
wpabuf_head(sta->fils_dh_ss) : NULL,
sta->fils_dh_ss ?
wpabuf_len(sta->fils_dh_ss) : 0,
pmk_buf, &pmk_len)) {
wpa_printf(MSG_DEBUG, "FILS: Failed to derive PMK");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
wpabuf_free(data);
data = NULL;
goto fail;
}
pmk = pmk_buf;
} else if (pmksa) {
pmk = pmksa->pmk;
pmk_len = pmksa->pmk_len;
}
if (!pmk) {
wpa_printf(MSG_DEBUG, "FILS: No PMK available");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
wpabuf_free(data);
data = NULL;
goto fail;
}
if (fils_auth_pmk_to_ptk(sta->wpa_sm, pmk, pmk_len,
sta->fils_snonce, fils_nonce) < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
wpabuf_free(data);
data = NULL;
goto fail;
}
fail:
auth_alg = (pub ||
resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED) ?
WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
send_auth_reply(hapd, sta->addr, hapd->own_addr, auth_alg, 2, resp,
data ? wpabuf_head(data) : (u8 *) "",
data ? wpabuf_len(data) : 0);
wpabuf_free(data);
if (resp == WLAN_STATUS_SUCCESS) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"authentication OK (FILS)");
sta->flags |= WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
sta->auth_alg = pub ? WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
mlme_authenticate_indication(hapd, sta);
}
os_free(ie_buf);
wpabuf_free(pub);
wpabuf_clear_free(sta->fils_dh_ss);
sta->fils_dh_ss = NULL;
#ifdef CONFIG_FILS_SK_PFS
crypto_ecdh_deinit(sta->fils_ecdh);
sta->fils_ecdh = NULL;
#endif /* CONFIG_FILS_SK_PFS */
}
void ieee802_11_finish_fils_auth(struct hostapd_data *hapd,
struct sta_info *sta, int success,
struct wpabuf *erp_resp,
const u8 *msk, size_t msk_len)
{
sta->flags &= ~WLAN_STA_PENDING_FILS_ERP;
handle_auth_fils_finish(hapd, sta, success ? WLAN_STATUS_SUCCESS :
WLAN_STATUS_UNSPECIFIED_FAILURE, NULL,
erp_resp, msk, msk_len);
}
#endif /* CONFIG_FILS */
static int
ieee802_11_allowed_address(struct hostapd_data *hapd, const u8 *addr,
const u8 *msg, size_t len, u32 *session_timeout,
u32 *acct_interim_interval,
struct vlan_description *vlan_id,
struct hostapd_sta_wpa_psk_short **psk,
char **identity, char **radius_cui)
{
int res;
os_memset(vlan_id, 0, sizeof(*vlan_id));
res = hostapd_allowed_address(hapd, addr, msg, 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(addr));
return HOSTAPD_ACL_REJECT;
}
if (res == HOSTAPD_ACL_PENDING) {
wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
" waiting for an external authentication",
MAC2STR(addr));
/* Authentication code will re-send the authentication frame
* after it has received (and cached) information from the
* external source. */
return HOSTAPD_ACL_PENDING;
}
return res;
}
static int
ieee802_11_set_radius_info(struct hostapd_data *hapd, struct sta_info *sta,
int res, u32 session_timeout,
u32 acct_interim_interval,
struct vlan_description *vlan_id,
struct hostapd_sta_wpa_psk_short **psk,
char **identity, char **radius_cui)
{
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] ? "+" : "");
return -1;
}
if (ap_sta_set_vlan(hapd, sta, vlan_id) < 0)
return -1;
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;
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);
return 0;
}
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;
VLAN: Separate station grouping and uplink configuration Separate uplink configuration (IEEE 802.1q VID) and grouping of stations into AP_VLAN interfaces. The int vlan_id will continue to identify the AP_VLAN interface the station should be assigned to. Each AP_VLAN interface corresponds to an instance of struct hostapd_vlan that is uniquely identified by int vlan_id within an BSS. New: Each station and struct hostapd_vlan holds a struct vlan_description vlan_desc member that describes the uplink configuration requested. Currently this is just an int untagged IEEE 802.1q VID, but can be extended to tagged VLANs and other settings easily. When the station was about to be assigned its vlan_id, vlan_desc and vlan_id will now be set simultaneously by ap_sta_set_vlan(). So sta->vlan_id can still be tested for whether the station needs to be moved to an AP_VLAN interface. To ease addition of tagged VLAN support, a member notempty is added to struct vlan_description. Is is set to 1 if an untagged or tagged VLAN assignment is requested and needs to be validated. The inverted form allows os_zalloc() to initialize an empty description. Though not depended on by the code, vlan_id assignment ensures: * vlan_id = 0 will continue to mean no AP_VLAN interface * vlan_id < 4096 will continue to mean vlan_id = untagged vlan id with no per_sta_vif and no extra tagged vlan. * vlan_id > 4096 will be used for per_sta_vif and/or tagged vlans. This way struct wpa_group and drivers API do not need to be changed in order to implement tagged VLANs or per_sta_vif support. DYNAMIC_VLAN_* will refer to (struct vlan_description).notempty only, thus grouping of the stations for per_sta_vif can be used with DYNAMIC_VLAN_DISABLED, but not with CONFIG_NO_VLAN, as struct hostapd_vlan is still used to manage AP_VLAN interfaces. MAX_VLAN_ID will be checked in hostapd_vlan_valid and during setup of VLAN interfaces and refer to IEEE 802.1q VID. VLAN_ID_WILDCARD will continue to refer to int vlan_id. Renaming vlan_id to vlan_desc when type changed from int to struct vlan_description was avoided when vlan_id was also used in a way that did not depend on its type (for example, when passed to another function). Output of "VLAN ID %d" continues to refer to int vlan_id, while "VLAN %d" will refer to untagged IEEE 802.1q VID. Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
2016-01-21 08:51:56 -05:00
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;
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_AP
(hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
auth_alg == WLAN_AUTH_FT) ||
#endif /* CONFIG_IEEE80211R_AP */
#ifdef CONFIG_SAE
(hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
auth_alg == WLAN_AUTH_SAE) ||
#endif /* CONFIG_SAE */
#ifdef CONFIG_FILS
(hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
auth_alg == WLAN_AUTH_FILS_SK) ||
(hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
hapd->conf->fils_dh_group &&
auth_alg == WLAN_AUTH_FILS_SK_PFS) ||
#endif /* CONFIG_FILS */
((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 = ieee802_11_allowed_address(
hapd, mgmt->sa, (const u8 *) mgmt, len, &session_timeout,
&acct_interim_interval, &vlan_id, &psk, &identity, &radius_cui);
if (res == HOSTAPD_ACL_REJECT) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (res == HOSTAPD_ACL_PENDING)
return;
sta = ap_get_sta(hapd, mgmt->sa);
if (sta) {
sta->flags &= ~WLAN_STA_PENDING_FILS_ERP;
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;
res = ieee802_11_set_radius_info(
hapd, sta, res, session_timeout, acct_interim_interval,
&vlan_id, &psk, &identity, &radius_cui);
if (res) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
sta->flags &= ~WLAN_STA_PREAUTH;
ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
/*
* 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 PMF was negotiated for the existing association, skip this to
* avoid dropping the STA entry and the associated keys. This is needed
* to allow the original connection work until the attempt can complete
* (re)association, so that unprotected Authentication frame cannot be
* used to bypass PMF protection.
*/
if (FULL_AP_CLIENT_STATE_SUPP(hapd->iface->drv_flags) &&
(!(sta->flags & WLAN_STA_MFP) || !ap_sta_is_authorized(sta)) &&
!(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_AP
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_AP */
#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 */
#ifdef CONFIG_FILS
case WLAN_AUTH_FILS_SK:
case WLAN_AUTH_FILS_SK_PFS:
handle_auth_fils(hapd, sta, mgmt, len, auth_alg,
auth_transaction, status_code);
return;
#endif /* CONFIG_FILS */
}
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)
{
/* Supported rates not used in IEEE 802.11ad/DMG */
if (hapd->iface->current_mode &&
hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD)
return WLAN_STATUS_SUCCESS;
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;
}
#ifdef CONFIG_OWE
static u16 owe_process_assoc_req(struct sta_info *sta, const u8 *owe_dh,
u8 owe_dh_len)
{
struct wpabuf *secret, *pub, *hkey;
int res;
u8 prk[SHA256_MAC_LEN], pmkid[SHA256_MAC_LEN];
const char *info = "OWE Key Generation";
const u8 *addr[2];
size_t len[2];
if (WPA_GET_LE16(owe_dh) != OWE_DH_GROUP)
return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
crypto_ecdh_deinit(sta->owe_ecdh);
sta->owe_ecdh = crypto_ecdh_init(OWE_DH_GROUP);
if (!sta->owe_ecdh)
return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
secret = crypto_ecdh_set_peerkey(sta->owe_ecdh, 0, owe_dh + 2,
owe_dh_len - 2);
if (!secret) {
wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret);
/* prk = HKDF-extract(C | A | group, z) */
pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
if (!pub) {
wpabuf_clear_free(secret);
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
/* PMKID = Truncate-128(Hash(C | A)) */
addr[0] = owe_dh + 2;
len[0] = owe_dh_len - 2;
addr[1] = wpabuf_head(pub);
len[1] = wpabuf_len(pub);
res = sha256_vector(2, addr, len, pmkid);
if (res < 0) {
wpabuf_free(pub);
wpabuf_clear_free(secret);
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
hkey = wpabuf_alloc(owe_dh_len - 2 + wpabuf_len(pub) + 2);
if (!hkey) {
wpabuf_free(pub);
wpabuf_clear_free(secret);
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
wpabuf_put_data(hkey, owe_dh + 2, owe_dh_len - 2); /* C */
wpabuf_put_buf(hkey, pub); /* A */
wpabuf_free(pub);
wpabuf_put_le16(hkey, OWE_DH_GROUP); /* group */
res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey),
wpabuf_head(secret), wpabuf_len(secret), prk);
wpabuf_clear_free(hkey);
wpabuf_clear_free(secret);
if (res < 0)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, SHA256_MAC_LEN);
/* PMK = HKDF-expand(prk, "OWE Key Generation", n) */
os_free(sta->owe_pmk);
sta->owe_pmk = os_malloc(PMK_LEN);
if (!sta->owe_pmk) {
os_memset(prk, 0, SHA256_MAC_LEN);
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
res = hmac_sha256_kdf(prk, SHA256_MAC_LEN, NULL, (const u8 *) info,
os_strlen(info), sta->owe_pmk, PMK_LEN);
os_memset(prk, 0, SHA256_MAC_LEN);
if (res < 0) {
os_free(sta->owe_pmk);
sta->owe_pmk = NULL;
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sta->owe_pmk, PMK_LEN);
wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN);
/* TODO: Add PMKSA cache entry */
return WLAN_STATUS_SUCCESS;
}
#endif /* CONFIG_OWE */
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,
elems.owe_dh, elems.owe_dh_len);
resp = wpa_res_to_status_code(res);
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_AP
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_AP */
#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_OWE
if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE &&
elems.owe_dh) {
resp = owe_process_assoc_req(sta, elems.owe_dh,
elems.owe_dh_len);
if (resp != WLAN_STATUS_SUCCESS)
return resp;
}
#endif /* CONFIG_OWE */
#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));
}
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
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)) {
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
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,
const u8 *addr, u16 status_code, int reassoc,
const u8 *ies, size_t ies_len)
{
int send_len;
u8 *buf;
size_t buflen;
struct ieee80211_mgmt *reply;
u8 *p;
u16 res = WLAN_STATUS_SUCCESS;
buflen = sizeof(struct ieee80211_mgmt) + 1024;
#ifdef CONFIG_FILS
if (sta && sta->fils_hlp_resp)
buflen += wpabuf_len(sta->fils_hlp_resp);
#endif /* CONFIG_FILS */
#ifdef CONFIG_OWE
if (sta && (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE))
buflen += 50;
#endif /* CONFIG_OWE */
buf = os_zalloc(buflen);
if (!buf) {
res = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto done;
}
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, 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 ? 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_AP
if (sta && 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 + buflen - p,
sta->auth_alg, ies, ies_len);
}
#endif /* CONFIG_IEEE80211R_AP */
#ifdef CONFIG_IEEE80211W
if (sta && 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) {
u32 nsts = 0, sta_nsts;
if (sta && hapd->conf->use_sta_nsts && sta->vht_capabilities) {
struct ieee80211_vht_capabilities *capa;
nsts = (hapd->iface->conf->vht_capab >>
VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
capa = sta->vht_capabilities;
sta_nsts = (le_to_host32(capa->vht_capabilities_info) >>
VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
if (nsts < sta_nsts)
nsts = 0;
else
nsts = sta_nsts;
}
p = hostapd_eid_vht_capabilities(hapd, p, nsts);
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 && 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 (sta && hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT))
p = hostapd_eid_vendor_vht(hapd, p);
#endif /* CONFIG_IEEE80211AC */
if (sta && (sta->flags & WLAN_STA_WMM))
p = hostapd_eid_wmm(hapd, p);
#ifdef CONFIG_WPS
if (sta &&
((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 */
2010-07-18 17:30:25 -04:00
#ifdef CONFIG_P2P
if (sta && sta->p2p_ie && hapd->p2p_group) {
2010-07-18 17:30:25 -04:00
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 + buflen - p);
if (hapd->conf->assocresp_elements &&
(size_t) (buf + buflen - 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;
#ifdef CONFIG_FILS
if (sta &&
(sta->auth_alg == WLAN_AUTH_FILS_SK ||
sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
sta->auth_alg == WLAN_AUTH_FILS_PK) &&
status_code == WLAN_STATUS_SUCCESS) {
struct ieee802_11_elems elems;
if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) ==
ParseFailed || !elems.fils_session) {
res = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto done;
}
/* FILS Session */
*p++ = WLAN_EID_EXTENSION; /* Element ID */
*p++ = 1 + FILS_SESSION_LEN; /* Length */
*p++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
os_memcpy(p, elems.fils_session, FILS_SESSION_LEN);
send_len += 2 + 1 + FILS_SESSION_LEN;
send_len = fils_encrypt_assoc(sta->wpa_sm, buf, send_len,
buflen, sta->fils_hlp_resp);
if (send_len < 0) {
res = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto done;
}
}
#endif /* CONFIG_FILS */
#ifdef CONFIG_OWE
if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
sta && sta->owe_ecdh &&
wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE) {
struct wpabuf *pub;
pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
if (!pub) {
res = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto done;
}
/* OWE Diffie-Hellman Parameter element */
*p++ = WLAN_EID_EXTENSION; /* Element ID */
*p++ = 1 + 2 + wpabuf_len(pub); /* Length */
*p++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension */
WPA_PUT_LE16(p, OWE_DH_GROUP);
p += 2;
os_memcpy(p, wpabuf_head(pub), wpabuf_len(pub));
p += wpabuf_len(pub);
send_len += 3 + 2 + wpabuf_len(pub);
wpabuf_free(pub);
}
#endif /* CONFIG_OWE */
if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) {
wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
strerror(errno));
res = WLAN_STATUS_UNSPECIFIED_FAILURE;
}
done:
os_free(buf);
return res;
}
#ifdef CONFIG_FILS
void fils_hlp_finish_assoc(struct hostapd_data *hapd, struct sta_info *sta)
{
u16 reply_res;
wpa_printf(MSG_DEBUG, "FILS: Finish association with " MACSTR,
MAC2STR(sta->addr));
eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
if (!sta->fils_pending_assoc_req)
return;
reply_res = send_assoc_resp(hapd, sta, sta->addr, WLAN_STATUS_SUCCESS,
sta->fils_pending_assoc_is_reassoc,
sta->fils_pending_assoc_req,
sta->fils_pending_assoc_req_len);
os_free(sta->fils_pending_assoc_req);
sta->fils_pending_assoc_req = NULL;
sta->fils_pending_assoc_req_len = 0;
wpabuf_free(sta->fils_hlp_resp);
sta->fils_hlp_resp = NULL;
wpabuf_free(sta->hlp_dhcp_discover);
sta->hlp_dhcp_discover = NULL;
/*
* 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 || sta->added_unassoc) {
hostapd_drv_sta_remove(hapd, sta->addr);
sta->added_unassoc = 0;
}
}
void fils_hlp_timeout(void *eloop_ctx, void *eloop_data)
{
struct hostapd_data *hapd = eloop_ctx;
struct sta_info *sta = eloop_data;
wpa_printf(MSG_DEBUG,
"FILS: HLP response timeout - continue with association response for "
MACSTR, MAC2STR(sta->addr));
fils_hlp_finish_assoc(hapd, sta);
}
#endif /* CONFIG_FILS */
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;
u8 *tmp = NULL;
struct hostapd_sta_wpa_psk_short *psk = NULL;
char *identity = NULL;
char *radius_cui = NULL;
#ifdef CONFIG_FILS
int delay_assoc = 0;
#endif /* CONFIG_FILS */
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_AP
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_AP */
if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
if (hapd->iface->current_mode &&
hapd->iface->current_mode->mode ==
HOSTAPD_MODE_IEEE80211AD) {
int acl_res;
u32 session_timeout, acct_interim_interval;
struct vlan_description vlan_id;
acl_res = ieee802_11_allowed_address(
hapd, mgmt->sa, (const u8 *) mgmt, len,
&session_timeout, &acct_interim_interval,
&vlan_id, &psk, &identity, &radius_cui);
if (acl_res == HOSTAPD_ACL_REJECT) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (acl_res == HOSTAPD_ACL_PENDING)
return;
/* DMG/IEEE 802.11ad does not use authentication.
* Allocate sta entry upon association. */
sta = ap_sta_add(hapd, mgmt->sa);
if (!sta) {
hostapd_logger(hapd, mgmt->sa,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO,
"Failed to add STA");
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto fail;
}
acl_res = ieee802_11_set_radius_info(
hapd, sta, acl_res, session_timeout,
acct_interim_interval, &vlan_id, &psk,
&identity, &radius_cui);
if (acl_res) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"Skip authentication for DMG/IEEE 802.11ad");
sta->flags |= WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
sta->auth_alg = WLAN_AUTH_OPEN;
} else {
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;
#ifdef CONFIG_FILS
if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
sta->auth_alg == WLAN_AUTH_FILS_PK) {
/* The end of the payload is encrypted. Need to decrypt it
* before parsing. */
tmp = os_memdup(pos, left);
if (!tmp) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
left = fils_decrypt_assoc(sta->wpa_sm, sta->fils_session, mgmt,
len, tmp, left);
if (left < 0) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
pos = tmp;
}
#endif /* CONFIG_FILS */
/* 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;
#ifdef CONFIG_TAXONOMY
taxonomy_sta_info_assoc_req(hapd, sta, pos, left);
#endif /* CONFIG_TAXONOMY */
sta->pending_wds_enable = 0;
#ifdef CONFIG_FILS
if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
sta->auth_alg == WLAN_AUTH_FILS_PK) {
if (fils_process_hlp(hapd, sta, pos, left) > 0)
delay_assoc = 1;
}
#endif /* CONFIG_FILS */
fail:
os_free(identity);
os_free(radius_cui);
hostapd_free_psk_list(psk);
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
/*
* 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 && sta && add_associated_sta(hapd, sta))
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
#ifdef CONFIG_FILS
if (sta) {
eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
os_free(sta->fils_pending_assoc_req);
sta->fils_pending_assoc_req = NULL;
sta->fils_pending_assoc_req_len = 0;
wpabuf_free(sta->fils_hlp_resp);
sta->fils_hlp_resp = NULL;
}
if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS) {
sta->fils_pending_assoc_req = tmp;
sta->fils_pending_assoc_req_len = left;
sta->fils_pending_assoc_is_reassoc = reassoc;
wpa_printf(MSG_DEBUG,
"FILS: Waiting for HLP processing before sending (Re)Association Response frame to "
MACSTR, MAC2STR(sta->addr));
eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
eloop_register_timeout(0, hapd->conf->fils_hlp_wait_time * 1024,
fils_hlp_timeout, hapd, sta);
return;
}
#endif /* CONFIG_FILS */
reply_res = send_assoc_resp(hapd, sta, mgmt->sa, resp, reassoc, pos,
left);
os_free(tmp);
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
/*
* 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 (sta && ((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));
/* DMG/IEEE 802.11ad does not use deauthication. Deallocate sta upon
* disassociation. */
if (hapd->iface->current_mode &&
hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD) {
sta->flags &= ~WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG, "deauthenticated");
ap_free_sta(hapd, sta);
}
}
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;
}
2009-05-26 10:08:43 -04:00
#endif /* CONFIG_IEEE80211W */
static int handle_action(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt, size_t len)
{
struct sta_info *sta;
2011-10-23 05:42:55 -04:00
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,
mgmt->u.action.category, MAC2STR(mgmt->sa));
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_AP
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_AP */
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 (!is_multicast_ether_addr(mgmt->da) &&
!(mgmt->u.action.category & 0x80) &&
!is_multicast_ether_addr(mgmt->sa)) {
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_memdup(mgmt, len);
if (resp == NULL)
return 0;
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
2009-01-02 15:28:04 -05:00
* @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, fi->ssi_signal);
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);
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
hostapd_drv_sta_remove(hapd, sta->addr);
return;
}
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
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;
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
/* The STA is added only in case of SUCCESS */
if (status == WLAN_STATUS_SUCCESS)
hostapd_drv_sta_remove(hapd, sta->addr);
AP: Set STA assoc flag in the driver before sending Assoc Resp frame Previously, stations were added to the driver only after the (Re)Association Response frame was acked. In the time period between the station has acked the (Re)Association Response frame and the time the station was added to the kernel, the station can already start sending Data frames, which will be dropped by the hardware/driver. In addition to the data loss, the driver may ignore NDPs with PM bit set from this STA. Fix this by setting/adding the STA with associated flag set to the driver before the AP sends the (Re)Association Response frame with status success. If the (Re)Association Response frame wasn't acked, remove the station from the driver. Note that setting a station to associated state before the non-AP station acknowledges the (Re)Association Response frame is not compliant with the IEEE 802.11 standard that specifically states that a non-AP station should transition to authenticated/associated state only after it acknowledged the (Re)Association Response frame. However, this is a justifiable simplification to work around the issue described above since 1. The station will be removed in case it does not acknowledge the (Re)Association Response frame. 2. All Data frames would be dropped until the station is set to authorized state and there are no known issues with processing the other Class 3 frames during the short window before the acknowledgement is seen. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-16 04:54:33 -05:00
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_FILS_SK ||
sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
sta->auth_alg == WLAN_AUTH_FILS_PK ||
sta->auth_alg == WLAN_AUTH_FT) {
/*
* Open, static WEP, FT protocol, or FILS; 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->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->flags & WLAN_STA_WDS) && sta->pending_wds_enable) {
wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for STA "
MACSTR " based on pending request",
MAC2STR(sta->addr));
sta->pending_wds_enable = 0;
sta->flags |= WLAN_STA_WDS;
}
if (sta->flags & WLAN_STA_WDS) {
int ret;
char ifname_wds[IFNAMSIZ + 1];
wpa_printf(MSG_DEBUG, "Reenable 4-address WDS mode for STA "
MACSTR " (aid %u)",
MAC2STR(sta->addr), sta->aid);
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->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);
#ifdef CONFIG_FILS
if ((sta->auth_alg == WLAN_AUTH_FILS_SK ||
sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
sta->auth_alg == WLAN_AUTH_FILS_PK) &&
fils_set_tk(sta->wpa_sm) < 0) {
wpa_printf(MSG_DEBUG, "FILS: TK configuration failed");
ap_sta_disconnect(hapd, sta, sta->addr,
WLAN_REASON_UNSPECIFIED);
return;
}
#endif /* CONFIG_FILS */
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 (is_multicast_ether_addr(mgmt->da))
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 (is_multicast_ether_addr(mgmt->da))
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);
}
static void handle_action_cb(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt,
size_t len, int ok)
{
struct sta_info *sta;
const struct rrm_measurement_report_element *report;
if (is_multicast_ether_addr(mgmt->da))
return;
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
wpa_printf(MSG_DEBUG, "handle_action_cb: STA " MACSTR
" not found", MAC2STR(mgmt->da));
return;
}
if (len < 24 + 5 + sizeof(*report))
return;
report = (const struct rrm_measurement_report_element *)
&mgmt->u.action.u.rrm.variable[2];
if (mgmt->u.action.category == WLAN_ACTION_RADIO_MEASUREMENT &&
mgmt->u.action.u.rrm.action == WLAN_RRM_RADIO_MEASUREMENT_REQUEST &&
report->eid == WLAN_EID_MEASURE_REQUEST &&
report->len >= 3 &&
report->type == MEASURE_TYPE_BEACON)
hostapd_rrm_beacon_req_tx_status(hapd, mgmt, len, ok);
}
/**
* 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);
handle_action_cb(hapd, mgmt, len, 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) ||
((sta->flags & WLAN_STA_ASSOC_REQ_OK) && wds))) {
if (!hapd->conf->wds_sta)
return;
if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK)) ==
WLAN_STA_ASSOC_REQ_OK) {
wpa_printf(MSG_DEBUG,
"Postpone 4-address WDS mode enabling for STA "
MACSTR " since TX status for AssocResp is not yet known",
MAC2STR(sta->addr));
sta->pending_wds_enable = 1;
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 (is_multicast_ether_addr(src)) {
/* 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 */