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hostap/hostapd/ieee802_11.c
Jouni Malinen bfddd95c9e Split hostapd/driver.h into two files 
driver.h contains the definitions needed in driver wrapper
implementations (driver_*.c) and driver_i.h contains the definitions
that are used in core hostapd code to interact with the driver wrappers.
2009-01-08 20:02:56 +02:00

1767 lines
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/*
* hostapd / IEEE 802.11 Management
* Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
* Copyright (c) 2007-2008, Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#ifndef CONFIG_NATIVE_WINDOWS
#include <net/if.h>
#include "eloop.h"
#include "hostapd.h"
#include "ieee802_11.h"
#include "beacon.h"
#include "hw_features.h"
#include "radius/radius.h"
#include "radius/radius_client.h"
#include "ieee802_11_auth.h"
#include "sta_info.h"
#include "rc4.h"
#include "ieee802_1x.h"
#include "wpa.h"
#include "wme.h"
#include "ap_list.h"
#include "accounting.h"
#include "driver_i.h"
#include "mlme.h"
u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
{
u8 *pos = eid;
int i, num, count;
if (hapd->iface->current_rates == NULL)
return eid;
*pos++ = WLAN_EID_SUPP_RATES;
num = hapd->iface->num_rates;
if (num > 8) {
/* rest of the rates are encoded in Extended supported
* rates element */
num = 8;
}
*pos++ = num;
count = 0;
for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
i++) {
count++;
*pos = hapd->iface->current_rates[i].rate / 5;
if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
*pos |= 0x80;
pos++;
}
return pos;
}
u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
{
u8 *pos = eid;
int i, num, count;
if (hapd->iface->current_rates == NULL)
return eid;
num = hapd->iface->num_rates;
if (num <= 8)
return eid;
num -= 8;
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = num;
count = 0;
for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
i++) {
count++;
if (count <= 8)
continue; /* already in SuppRates IE */
*pos = hapd->iface->current_rates[i].rate / 5;
if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
*pos |= 0x80;
pos++;
}
return pos;
}
u8 * hostapd_eid_ht_capabilities_info(struct hostapd_data *hapd, u8 *eid)
{
#ifdef CONFIG_IEEE80211N
struct ieee80211_ht_capability *cap;
u8 *pos = eid;
if (!hapd->iconf->ieee80211n)
return eid;
*pos++ = WLAN_EID_HT_CAP;
*pos++ = sizeof(*cap);
cap = (struct ieee80211_ht_capability *) pos;
os_memset(cap, 0, sizeof(*cap));
SET_2BIT_U8(&cap->mac_ht_params_info,
MAC_HT_PARAM_INFO_MAX_RX_AMPDU_FACTOR_OFFSET,
MAX_RX_AMPDU_FACTOR_64KB);
cap->capabilities_info = host_to_le16(hapd->iconf->ht_capab);
cap->supported_mcs_set[0] = 0xff;
cap->supported_mcs_set[1] = 0xff;
pos += sizeof(*cap);
return pos;
#else /* CONFIG_IEEE80211N */
return eid;
#endif /* CONFIG_IEEE80211N */
}
u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
{
#ifdef CONFIG_IEEE80211N
struct ieee80211_ht_operation *oper;
u8 *pos = eid;
if (!hapd->iconf->ieee80211n)
return eid;
*pos++ = WLAN_EID_HT_OPERATION;
*pos++ = sizeof(*oper);
oper = (struct ieee80211_ht_operation *) pos;
os_memset(oper, 0, sizeof(*oper));
oper->control_chan = hapd->iconf->channel;
oper->operation_mode = host_to_le16(hapd->iface->ht_op_mode);
if (hapd->iconf->secondary_channel == 1)
oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE |
HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
if (hapd->iconf->secondary_channel == -1)
oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW |
HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
pos += sizeof(*oper);
return pos;
#else /* CONFIG_IEEE80211N */
return eid;
#endif /* CONFIG_IEEE80211N */
}
#ifdef CONFIG_IEEE80211N
/*
op_mode
Set to 0 (HT pure) under the followign conditions
- all STAs in the BSS are 20/40 MHz HT in 20/40 MHz BSS or
- all STAs in the BSS are 20 MHz HT in 20 MHz BSS
Set to 1 (HT non-member protection) if there may be non-HT STAs
in both the primary and the secondary channel
Set to 2 if only HT STAs are associated in BSS,
however and at least one 20 MHz HT STA is associated
Set to 3 (HT mixed mode) when one or more non-HT STAs are associated
(currently non-GF HT station is considered as non-HT STA also)
*/
int hostapd_ht_operation_update(struct hostapd_iface *iface)
{
u16 cur_op_mode, new_op_mode;
int op_mode_changes = 0;
if (!iface->conf->ieee80211n || iface->conf->ht_op_mode_fixed)
return 0;
wpa_printf(MSG_DEBUG, "%s current operation mode=0x%X",
__func__, iface->ht_op_mode);
if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT)
&& iface->num_sta_ht_no_gf) {
iface->ht_op_mode |=
HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
op_mode_changes++;
} else if ((iface->ht_op_mode &
HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT) &&
iface->num_sta_ht_no_gf == 0) {
iface->ht_op_mode &=
~HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
op_mode_changes++;
}
if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
(iface->num_sta_no_ht || iface->olbc_ht)) {
iface->ht_op_mode |= HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
op_mode_changes++;
} else if ((iface->ht_op_mode &
HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
(iface->num_sta_no_ht == 0 && !iface->olbc_ht)) {
iface->ht_op_mode &=
~HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
op_mode_changes++;
}
/* Note: currently we switch to the MIXED op mode if HT non-greenfield
* station is associated. Probably it's a theoretical case, since
* it looks like all known HT STAs support greenfield.
*/
new_op_mode = 0;
if (iface->num_sta_no_ht ||
(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT))
new_op_mode = OP_MODE_MIXED;
else if ((iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)
&& iface->num_sta_ht_20mhz)
new_op_mode = OP_MODE_20MHZ_HT_STA_ASSOCED;
else if (iface->olbc_ht)
new_op_mode = OP_MODE_MAY_BE_LEGACY_STAS;
else
new_op_mode = OP_MODE_PURE;
cur_op_mode = iface->ht_op_mode & HT_INFO_OPERATION_MODE_OP_MODE_MASK;
if (cur_op_mode != new_op_mode) {
iface->ht_op_mode &= ~HT_INFO_OPERATION_MODE_OP_MODE_MASK;
iface->ht_op_mode |= new_op_mode;
op_mode_changes++;
}
wpa_printf(MSG_DEBUG, "%s new operation mode=0x%X changes=%d",
__func__, iface->ht_op_mode, op_mode_changes);
return op_mode_changes;
}
#endif /* CONFIG_IEEE80211N */
u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
int probe)
{
int capab = WLAN_CAPABILITY_ESS;
int privacy;
if (hapd->iface->num_sta_no_short_preamble == 0 &&
hapd->iconf->preamble == SHORT_PREAMBLE)
capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
privacy = hapd->conf->ssid.wep.keys_set;
if (hapd->conf->ieee802_1x &&
(hapd->conf->default_wep_key_len ||
hapd->conf->individual_wep_key_len))
privacy = 1;
if (hapd->conf->wpa)
privacy = 1;
if (sta) {
int policy, def_klen;
if (probe && sta->ssid_probe) {
policy = sta->ssid_probe->security_policy;
def_klen = sta->ssid_probe->wep.default_len;
} else {
policy = sta->ssid->security_policy;
def_klen = sta->ssid->wep.default_len;
}
privacy = policy != SECURITY_PLAINTEXT;
if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
privacy = 0;
}
if (privacy)
capab |= WLAN_CAPABILITY_PRIVACY;
if (hapd->iface->current_mode &&
hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
hapd->iface->num_sta_no_short_slot_time == 0)
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
return capab;
}
#ifdef CONFIG_IEEE80211W
static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
struct sta_info *sta, u8 *eid)
{
u8 *pos = eid;
u32 timeout, tu;
struct os_time now, passed;
*pos++ = WLAN_EID_ASSOC_COMEBACK_TIME;
*pos++ = 4;
os_get_time(&now);
os_time_sub(&now, &sta->sa_query_start, &passed);
tu = (passed.sec * 1000000 + passed.usec) / 1024;
if (hapd->conf->assoc_sa_query_max_timeout > tu)
timeout = hapd->conf->assoc_sa_query_max_timeout - tu;
else
timeout = 0;
if (timeout < hapd->conf->assoc_sa_query_max_timeout)
timeout++; /* add some extra time for local timers */
WPA_PUT_LE32(pos, timeout);
pos += 4;
return pos;
}
#endif /* CONFIG_IEEE80211W */
void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len)
{
int i;
if (len > HOSTAPD_MAX_SSID_LEN)
len = HOSTAPD_MAX_SSID_LEN;
for (i = 0; i < len; i++) {
if (ssid[i] >= 32 && ssid[i] < 127)
buf[i] = ssid[i];
else
buf[i] = '.';
}
buf[len] = '\0';
}
/**
* ieee802_11_send_deauth - Send Deauthentication frame
* @hapd: hostapd BSS data
* @addr: Address of the destination STA
* @reason: Reason code for Deauthentication
*/
void ieee802_11_send_deauth(struct hostapd_data *hapd, u8 *addr, u16 reason)
{
struct ieee80211_mgmt mgmt;
hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"deauthenticate - reason %d", reason);
os_memset(&mgmt, 0, sizeof(mgmt));
mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_DEAUTH);
os_memcpy(mgmt.da, addr, ETH_ALEN);
os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
mgmt.u.deauth.reason_code = host_to_le16(reason);
if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
sizeof(mgmt.u.deauth), 0) < 0)
perror("ieee802_11_send_deauth: send");
}
static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
u16 auth_transaction, u8 *challenge, int iswep)
{
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"authentication (shared key, transaction %d)",
auth_transaction);
if (auth_transaction == 1) {
if (!sta->challenge) {
/* Generate a pseudo-random challenge */
u8 key[8];
time_t now;
int r;
sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
if (sta->challenge == NULL)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
now = time(NULL);
r = random();
os_memcpy(key, &now, 4);
os_memcpy(key + 4, &r, 4);
rc4(sta->challenge, WLAN_AUTH_CHALLENGE_LEN,
key, sizeof(key));
}
return 0;
}
if (auth_transaction != 3)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
/* Transaction 3 */
if (!iswep || !sta->challenge || !challenge ||
os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO,
"shared key authentication - invalid "
"challenge-response");
return WLAN_STATUS_CHALLENGE_FAIL;
}
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"authentication OK (shared key)");
#ifdef IEEE80211_REQUIRE_AUTH_ACK
/* Station will be marked authenticated if it ACKs the
* authentication reply. */
#else
sta->flags |= WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
#endif
os_free(sta->challenge);
sta->challenge = NULL;
return 0;
}
static void send_auth_reply(struct hostapd_data *hapd,
const u8 *dst, const u8 *bssid,
u16 auth_alg, u16 auth_transaction, u16 resp,
const u8 *ies, size_t ies_len)
{
struct ieee80211_mgmt *reply;
u8 *buf;
size_t rlen;
rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
buf = os_zalloc(rlen);
if (buf == NULL)
return;
reply = (struct ieee80211_mgmt *) buf;
reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_AUTH);
os_memcpy(reply->da, dst, ETH_ALEN);
os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(reply->bssid, bssid, ETH_ALEN);
reply->u.auth.auth_alg = host_to_le16(auth_alg);
reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
reply->u.auth.status_code = host_to_le16(resp);
if (ies && ies_len)
os_memcpy(reply->u.auth.variable, ies, ies_len);
wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
" auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
MAC2STR(dst), auth_alg, auth_transaction,
resp, (unsigned long) ies_len);
if (hostapd_send_mgmt_frame(hapd, reply, rlen, 0) < 0)
perror("send_auth_reply: send");
os_free(buf);
}
#ifdef CONFIG_IEEE80211R
static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
u16 auth_transaction, u16 status,
const u8 *ies, size_t ies_len)
{
struct hostapd_data *hapd = ctx;
struct sta_info *sta;
send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
status, ies, ies_len);
if (status != WLAN_STATUS_SUCCESS)
return;
sta = ap_get_sta(hapd, dst);
if (sta == NULL)
return;
hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
sta->flags |= WLAN_STA_AUTH;
mlme_authenticate_indication(hapd, sta);
}
#endif /* CONFIG_IEEE80211R */
static void handle_auth(struct hostapd_data *hapd, struct ieee80211_mgmt *mgmt,
size_t len)
{
u16 auth_alg, auth_transaction, status_code;
u16 resp = WLAN_STATUS_SUCCESS;
struct sta_info *sta = NULL;
int res;
u16 fc;
u8 *challenge = NULL;
u32 session_timeout, acct_interim_interval;
int vlan_id = 0;
u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
size_t resp_ies_len = 0;
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
printf("handle_auth - too short payload (len=%lu)\n",
(unsigned long) len);
return;
}
auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
status_code = le_to_host16(mgmt->u.auth.status_code);
fc = le_to_host16(mgmt->frame_control);
if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
2 + WLAN_AUTH_CHALLENGE_LEN &&
mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
challenge = &mgmt->u.auth.variable[2];
wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
"auth_transaction=%d status_code=%d wep=%d%s",
MAC2STR(mgmt->sa), auth_alg, auth_transaction,
status_code, !!(fc & WLAN_FC_ISWEP),
challenge ? " challenge" : "");
if (hapd->tkip_countermeasures) {
resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
goto fail;
}
if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
auth_alg == WLAN_AUTH_OPEN) ||
#ifdef CONFIG_IEEE80211R
(hapd->conf->wpa &&
(hapd->conf->wpa_key_mgmt &
(WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
auth_alg == WLAN_AUTH_FT) ||
#endif /* CONFIG_IEEE80211R */
((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
auth_alg == WLAN_AUTH_SHARED_KEY))) {
printf("Unsupported authentication algorithm (%d)\n",
auth_alg);
resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
goto fail;
}
if (!(auth_transaction == 1 ||
(auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
printf("Unknown authentication transaction number (%d)\n",
auth_transaction);
resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
goto fail;
}
if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
printf("Station " MACSTR " not allowed to authenticate.\n",
MAC2STR(mgmt->sa));
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
&session_timeout,
&acct_interim_interval, &vlan_id);
if (res == HOSTAPD_ACL_REJECT) {
printf("Station " MACSTR " not allowed to authenticate.\n",
MAC2STR(mgmt->sa));
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (res == HOSTAPD_ACL_PENDING) {
wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
" waiting for an external authentication",
MAC2STR(mgmt->sa));
/* Authentication code will re-send the authentication frame
* after it has received (and cached) information from the
* external source. */
return;
}
sta = ap_sta_add(hapd, mgmt->sa);
if (!sta) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (vlan_id > 0) {
if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
sta->vlan_id) == NULL) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
"%d received from RADIUS server",
vlan_id);
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
sta->vlan_id = vlan_id;
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
}
sta->flags &= ~WLAN_STA_PREAUTH;
ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
if (hapd->conf->radius->acct_interim_interval == 0 &&
acct_interim_interval)
sta->acct_interim_interval = acct_interim_interval;
if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
ap_sta_session_timeout(hapd, sta, session_timeout);
else
ap_sta_no_session_timeout(hapd, sta);
switch (auth_alg) {
case WLAN_AUTH_OPEN:
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"authentication OK (open system)");
#ifdef IEEE80211_REQUIRE_AUTH_ACK
/* Station will be marked authenticated if it ACKs the
* authentication reply. */
#else
sta->flags |= WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
sta->auth_alg = WLAN_AUTH_OPEN;
mlme_authenticate_indication(hapd, sta);
#endif
break;
case WLAN_AUTH_SHARED_KEY:
resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
fc & WLAN_FC_ISWEP);
sta->auth_alg = WLAN_AUTH_SHARED_KEY;
mlme_authenticate_indication(hapd, sta);
if (sta->challenge && auth_transaction == 1) {
resp_ies[0] = WLAN_EID_CHALLENGE;
resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
os_memcpy(resp_ies + 2, sta->challenge,
WLAN_AUTH_CHALLENGE_LEN);
resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
}
break;
#ifdef CONFIG_IEEE80211R
case WLAN_AUTH_FT:
sta->auth_alg = WLAN_AUTH_FT;
if (sta->wpa_sm == NULL)
sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
sta->addr);
if (sta->wpa_sm == NULL) {
wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
"state machine");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
auth_transaction, mgmt->u.auth.variable,
len - IEEE80211_HDRLEN -
sizeof(mgmt->u.auth),
handle_auth_ft_finish, hapd);
/* handle_auth_ft_finish() callback will complete auth. */
return;
#endif /* CONFIG_IEEE80211R */
}
fail:
send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
auth_transaction + 1, resp, resp_ies, resp_ies_len);
}
static void handle_assoc(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt, size_t len, int reassoc)
{
u16 capab_info, listen_interval;
u16 resp = WLAN_STATUS_SUCCESS;
u8 *pos, *wpa_ie;
size_t wpa_ie_len;
int send_deauth = 0, send_len, left, i;
struct sta_info *sta;
struct ieee802_11_elems elems;
u8 buf[sizeof(struct ieee80211_mgmt) + 512];
struct ieee80211_mgmt *reply;
if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
sizeof(mgmt->u.assoc_req))) {
printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
"\n", reassoc, (unsigned long) len);
return;
}
if (reassoc) {
capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
listen_interval = le_to_host16(
mgmt->u.reassoc_req.listen_interval);
wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
" capab_info=0x%02x listen_interval=%d current_ap="
MACSTR,
MAC2STR(mgmt->sa), capab_info, listen_interval,
MAC2STR(mgmt->u.reassoc_req.current_ap));
left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
pos = mgmt->u.reassoc_req.variable;
} else {
capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
listen_interval = le_to_host16(
mgmt->u.assoc_req.listen_interval);
wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
" capab_info=0x%02x listen_interval=%d",
MAC2STR(mgmt->sa), capab_info, listen_interval);
left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
pos = mgmt->u.assoc_req.variable;
}
sta = ap_get_sta(hapd, mgmt->sa);
#ifdef CONFIG_IEEE80211R
if (sta && sta->auth_alg == WLAN_AUTH_FT &&
(sta->flags & WLAN_STA_AUTH) == 0) {
wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
"prior to authentication since it is using "
"over-the-DS FT", MAC2STR(mgmt->sa));
} else
#endif /* CONFIG_IEEE80211R */
if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
printf("STA " MACSTR " trying to associate before "
"authentication\n", MAC2STR(mgmt->sa));
if (sta) {
printf(" sta: addr=" MACSTR " aid=%d flags=0x%04x\n",
MAC2STR(sta->addr), sta->aid, sta->flags);
}
send_deauth = 1;
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
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;
}
sta->capability = capab_info;
sta->listen_interval = listen_interval;
/* followed by SSID and Supported rates; and HT capabilities if 802.11n
* is used */
if (ieee802_11_parse_elems(pos, left, &elems, 1) == ParseFailed ||
!elems.ssid) {
printf("STA " MACSTR " sent invalid association request\n",
MAC2STR(sta->addr));
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (elems.ssid_len != hapd->conf->ssid.ssid_len ||
os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) != 0)
{
char ssid_txt[33];
ieee802_11_print_ssid(ssid_txt, elems.ssid, elems.ssid_len);
printf("Station " MACSTR " tried to associate with "
"unknown SSID '%s'\n", MAC2STR(sta->addr), ssid_txt);
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
sta->flags &= ~WLAN_STA_WME;
if (elems.wme && hapd->conf->wme_enabled) {
if (hostapd_eid_wme_valid(hapd, elems.wme, elems.wme_len))
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_WPA,
HOSTAPD_LEVEL_DEBUG,
"invalid WME element in association "
"request");
else
sta->flags |= WLAN_STA_WME;
}
if (!elems.supp_rates) {
hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"No supported rates element in AssocReq");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (elems.supp_rates_len > sizeof(sta->supported_rates)) {
hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"Invalid supported rates element length %d",
elems.supp_rates_len);
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
os_memcpy(sta->supported_rates, elems.supp_rates,
elems.supp_rates_len);
sta->supported_rates_len = elems.supp_rates_len;
if (elems.ext_supp_rates) {
if (elems.supp_rates_len + elems.ext_supp_rates_len >
sizeof(sta->supported_rates)) {
hostapd_logger(hapd, mgmt->sa,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"Invalid supported rates element length"
" %d+%d", elems.supp_rates_len,
elems.ext_supp_rates_len);
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
os_memcpy(sta->supported_rates + elems.supp_rates_len,
elems.ext_supp_rates, elems.ext_supp_rates_len);
sta->supported_rates_len += elems.ext_supp_rates_len;
}
#ifdef CONFIG_IEEE80211N
/* save HT capabilities in the sta object */
os_memset(&sta->ht_capabilities, 0, sizeof(sta->ht_capabilities));
if (elems.ht_capabilities &&
elems.ht_capabilities_len >=
sizeof(struct ieee80211_ht_capability)) {
sta->flags |= WLAN_STA_HT;
sta->ht_capabilities.id = WLAN_EID_HT_CAP;
sta->ht_capabilities.length =
sizeof(struct ieee80211_ht_capability);
os_memcpy(&sta->ht_capabilities.data,
elems.ht_capabilities,
sizeof(struct ieee80211_ht_capability));
} else
sta->flags &= ~WLAN_STA_HT;
#endif /* CONFIG_IEEE80211N */
if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
wpa_ie = elems.rsn_ie;
wpa_ie_len = elems.rsn_ie_len;
} else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
elems.wpa_ie) {
wpa_ie = elems.wpa_ie;
wpa_ie_len = elems.wpa_ie_len;
} else {
wpa_ie = NULL;
wpa_ie_len = 0;
}
#ifdef CONFIG_WPS
sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
if (hapd->conf->wps_state && wpa_ie == NULL) {
if (elems.wps_ie) {
wpa_printf(MSG_DEBUG, "STA included WPS IE in "
"(Re)Association Request - assume WPS is "
"used");
sta->flags |= WLAN_STA_WPS;
wpabuf_free(sta->wps_ie);
sta->wps_ie = wpabuf_alloc_copy(elems.wps_ie + 4,
elems.wps_ie_len - 4);
} else {
wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE "
"in (Re)Association Request - possible WPS "
"use");
sta->flags |= WLAN_STA_MAYBE_WPS;
}
} else
#endif /* CONFIG_WPS */
if (hapd->conf->wpa && wpa_ie == NULL) {
printf("STA " MACSTR ": No WPA/RSN IE in association "
"request\n", MAC2STR(sta->addr));
resp = WLAN_STATUS_INVALID_IE;
goto fail;
}
if (hapd->conf->wpa && wpa_ie) {
int res;
wpa_ie -= 2;
wpa_ie_len += 2;
if (sta->wpa_sm == NULL)
sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
sta->addr);
if (sta->wpa_sm == NULL) {
printf("Failed to initialize WPA state machine\n");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
wpa_ie, wpa_ie_len,
elems.mdie, elems.mdie_len);
if (res == WPA_INVALID_GROUP)
resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
else if (res == WPA_INVALID_PAIRWISE)
resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
else if (res == WPA_INVALID_AKMP)
resp = WLAN_STATUS_AKMP_NOT_VALID;
else if (res == WPA_ALLOC_FAIL)
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
#ifdef CONFIG_IEEE80211W
else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
#endif /* CONFIG_IEEE80211W */
else if (res == WPA_INVALID_MDIE)
resp = WLAN_STATUS_INVALID_MDIE;
else if (res != WPA_IE_OK)
resp = WLAN_STATUS_INVALID_IE;
if (resp != WLAN_STATUS_SUCCESS)
goto fail;
#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);
resp = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
goto fail;
}
if (wpa_auth_uses_mfp(sta->wpa_sm))
sta->flags |= WLAN_STA_MFP;
else
sta->flags &= ~WLAN_STA_MFP;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_IEEE80211R
if (sta->auth_alg == WLAN_AUTH_FT) {
if (!reassoc) {
wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
"to use association (not "
"re-association) with FT auth_alg",
MAC2STR(sta->addr));
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
resp = wpa_ft_validate_reassoc(sta->wpa_sm, pos, left);
if (resp != WLAN_STATUS_SUCCESS)
goto fail;
}
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211N
if ((sta->flags & WLAN_STA_HT) &&
wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
wpa_printf(MSG_DEBUG, "HT: " MACSTR " tried to "
"use TKIP with HT association",
MAC2STR(sta->addr));
resp = WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
goto fail;
}
#endif /* CONFIG_IEEE80211N */
} else
wpa_auth_sta_no_wpa(sta->wpa_sm);
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
if (sta->flags & WLAN_STA_HT) {
u16 ht_capab = le_to_host16(
sta->ht_capabilities.data.capabilities_info);
wpa_printf(MSG_DEBUG, "HT: STA " MACSTR " HT Capabilities "
"Info: 0x%04x", MAC2STR(sta->addr), ht_capab);
if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0) {
if (!sta->no_ht_gf_set) {
sta->no_ht_gf_set = 1;
hapd->iface->num_sta_ht_no_gf++;
}
wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no "
"greenfield, num of non-gf stations %d",
__func__, MAC2STR(sta->addr),
hapd->iface->num_sta_ht_no_gf);
}
if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0) {
if (!sta->ht_20mhz_set) {
sta->ht_20mhz_set = 1;
hapd->iface->num_sta_ht_20mhz++;
}
wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - 20 MHz HT, "
"num of 20MHz HT STAs %d",
__func__, MAC2STR(sta->addr),
hapd->iface->num_sta_ht_20mhz);
}
} else {
if (!sta->no_ht_set) {
sta->no_ht_set = 1;
hapd->iface->num_sta_no_ht++;
}
if (hapd->iconf->ieee80211n) {
wpa_printf(MSG_DEBUG, "%s STA " MACSTR
" - no HT, num of non-HT stations %d",
__func__, MAC2STR(sta->addr),
hapd->iface->num_sta_no_ht);
}
}
if (hostapd_ht_operation_update(hapd->iface) > 0)
ieee802_11_set_beacons(hapd->iface);
#endif /* CONFIG_IEEE80211N */
/* get a unique AID */
if (sta->aid > 0) {
wpa_printf(MSG_DEBUG, " old AID %d", sta->aid);
} else {
for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
if (hapd->sta_aid[sta->aid - 1] == NULL)
break;
if (sta->aid > MAX_AID_TABLE_SIZE) {
sta->aid = 0;
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
wpa_printf(MSG_ERROR, " no room for more AIDs");
goto fail;
} else {
hapd->sta_aid[sta->aid - 1] = sta;
wpa_printf(MSG_DEBUG, " new AID %d", sta->aid);
}
}
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"association OK (aid %d)", sta->aid);
/* Station will be marked associated, after it acknowledges AssocResp
*/
#ifdef CONFIG_IEEE80211W
if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
"SA Query procedure", reassoc ? "re" : "");
/* TODO: Send a protected Disassociate frame to the STA using
* the old key and Reason Code "Previous Authentication no
* longer valid". Make sure this is only sent protected since
* unprotected frame would be received by the STA that is now
* trying to associate.
*/
}
#endif /* CONFIG_IEEE80211W */
if (reassoc) {
os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap,
ETH_ALEN);
}
if (sta->last_assoc_req)
os_free(sta->last_assoc_req);
sta->last_assoc_req = os_malloc(len);
if (sta->last_assoc_req)
os_memcpy(sta->last_assoc_req, mgmt, len);
/* Make sure that the previously registered inactivity timer will not
* remove the STA immediately. */
sta->timeout_next = STA_NULLFUNC;
fail:
os_memset(buf, 0, sizeof(buf));
reply = (struct ieee80211_mgmt *) buf;
reply->frame_control =
IEEE80211_FC(WLAN_FC_TYPE_MGMT,
(send_deauth ? WLAN_FC_STYPE_DEAUTH :
(reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
WLAN_FC_STYPE_ASSOC_RESP)));
os_memcpy(reply->da, mgmt->sa, ETH_ALEN);
os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(reply->bssid, mgmt->bssid, ETH_ALEN);
send_len = IEEE80211_HDRLEN;
if (send_deauth) {
send_len += sizeof(reply->u.deauth);
reply->u.deauth.reason_code = host_to_le16(resp);
} else {
u8 *p;
send_len += sizeof(reply->u.assoc_resp);
reply->u.assoc_resp.capab_info =
host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
reply->u.assoc_resp.status_code = host_to_le16(resp);
reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
| BIT(14) | BIT(15));
/* Supported rates */
p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
/* Extended supported rates */
p = hostapd_eid_ext_supp_rates(hapd, p);
if (sta->flags & WLAN_STA_WME)
p = hostapd_eid_wme(hapd, p);
p = hostapd_eid_ht_capabilities_info(hapd, p);
p = hostapd_eid_ht_operation(hapd, p);
#ifdef CONFIG_IEEE80211R
if (resp == WLAN_STATUS_SUCCESS) {
/* IEEE 802.11r: Mobility Domain Information, Fast BSS
* Transition Information, RSN */
p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
buf + sizeof(buf) - p,
sta->auth_alg);
}
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
if (resp == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
#endif /* CONFIG_IEEE80211W */
send_len += p - reply->u.assoc_resp.variable;
}
if (hostapd_send_mgmt_frame(hapd, reply, send_len, 0) < 0)
perror("handle_assoc: send");
}
static void handle_disassoc(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct sta_info *sta;
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
printf("handle_disassoc - too short payload (len=%lu)\n",
(unsigned long) len);
return;
}
wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
MAC2STR(mgmt->sa),
le_to_host16(mgmt->u.disassoc.reason_code));
sta = ap_get_sta(hapd, mgmt->sa);
if (sta == NULL) {
printf("Station " MACSTR " trying to disassociate, but it "
"is not associated.\n", MAC2STR(mgmt->sa));
return;
}
sta->flags &= ~WLAN_STA_ASSOC;
wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO, "disassociated");
sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
/* Stop Accounting and IEEE 802.1X sessions, but leave the STA
* authenticated. */
accounting_sta_stop(hapd, sta);
ieee802_1x_free_station(sta);
hostapd_sta_remove(hapd, sta->addr);
if (sta->timeout_next == STA_NULLFUNC ||
sta->timeout_next == STA_DISASSOC) {
sta->timeout_next = STA_DEAUTH;
eloop_cancel_timeout(ap_handle_timer, hapd, sta);
eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
hapd, sta);
}
mlme_disassociate_indication(
hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
}
static void handle_deauth(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct sta_info *sta;
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
printf("handle_deauth - too short payload (len=%lu)\n",
(unsigned long) len);
return;
}
wpa_printf(MSG_DEBUG, "deauthentication: STA=" MACSTR
" reason_code=%d",
MAC2STR(mgmt->sa),
le_to_host16(mgmt->u.deauth.reason_code));
sta = ap_get_sta(hapd, mgmt->sa);
if (sta == NULL) {
printf("Station " MACSTR " trying to deauthenticate, but it "
"is not authenticated.\n", MAC2STR(mgmt->sa));
return;
}
sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
wpa_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,
struct ieee80211_mgmt *mgmt, size_t len,
struct hostapd_frame_info *fi)
{
struct ieee802_11_elems elems;
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
printf("handle_beacon - too short payload (len=%lu)\n",
(unsigned long) len);
return;
}
(void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
len - (IEEE80211_HDRLEN +
sizeof(mgmt->u.beacon)), &elems,
0);
ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
}
#ifdef CONFIG_IEEE80211W
/* MLME-SAQuery.request */
void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
const u8 *addr, const u8 *trans_id)
{
struct ieee80211_mgmt mgmt;
u8 *end;
os_memset(&mgmt, 0, sizeof(mgmt));
mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
os_memcpy(mgmt.da, addr, ETH_ALEN);
os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
WLAN_SA_QUERY_TR_ID_LEN);
end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
if (hostapd_send_mgmt_frame(hapd, &mgmt, end - (u8 *) &mgmt, 0) < 0)
perror("ieee802_11_send_sa_query_req: send");
}
static void hostapd_sa_query_action(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct sta_info *sta;
u8 *end;
int i;
end = mgmt->u.action.u.sa_query_resp.trans_id +
WLAN_SA_QUERY_TR_ID_LEN;
if (((u8 *) mgmt) + len < end) {
wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
"frame (len=%lu)", (unsigned long) len);
return;
}
if (mgmt->u.action.u.sa_query_resp.action != WLAN_SA_QUERY_RESPONSE) {
wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query "
"Action %d", mgmt->u.action.u.sa_query_resp.action);
return;
}
/* MLME-SAQuery.confirm */
sta = ap_get_sta(hapd, mgmt->sa);
if (sta == NULL || sta->sa_query_trans_id == NULL) {
wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
"pending SA Query request found");
return;
}
for (i = 0; i < sta->sa_query_count; i++) {
if (os_memcmp(sta->sa_query_trans_id +
i * WLAN_SA_QUERY_TR_ID_LEN,
mgmt->u.action.u.sa_query_resp.trans_id,
WLAN_SA_QUERY_TR_ID_LEN) == 0)
break;
}
if (i >= sta->sa_query_count) {
wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query "
"transaction identifier found");
return;
}
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"Reply to pending SA Query received");
ap_sta_stop_sa_query(hapd, sta);
}
#endif /* CONFIG_IEEE80211W */
static void handle_action(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt, size_t len)
{
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;
}
switch (mgmt->u.action.category) {
#ifdef CONFIG_IEEE80211R
case WLAN_ACTION_FT:
{
struct sta_info *sta;
sta = ap_get_sta(hapd, mgmt->sa);
if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action "
"frame from unassociated STA " MACSTR,
MAC2STR(mgmt->sa));
return;
}
if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
len - IEEE80211_HDRLEN))
break;
return;
}
#endif /* CONFIG_IEEE80211R */
case WLAN_ACTION_WMM:
hostapd_wme_action(hapd, mgmt, len);
return;
#ifdef CONFIG_IEEE80211W
case WLAN_ACTION_SA_QUERY:
hostapd_sa_query_action(hapd, mgmt, len);
return;
#endif /* CONFIG_IEEE80211W */
}
hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"handle_action - unknown action category %d or invalid "
"frame",
mgmt->u.action.category);
if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
!(mgmt->sa[0] & 0x01)) {
/*
* 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");
os_memcpy(mgmt->da, mgmt->sa, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
mgmt->u.action.category |= 0x80;
hostapd_send_mgmt_frame(hapd, mgmt, len, 0);
}
}
/**
* 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
* @stype: management frame subtype from frame control field
* @fi: meta data about received frame (signal level, etc.)
*
* Process all incoming IEEE 802.11 management frames. This will be called for
* each frame received from the kernel driver through wlan#ap interface. In
* addition, it can be called to re-inserted pending frames (e.g., when using
* external RADIUS server as an MAC ACL).
*/
void ieee802_11_mgmt(struct hostapd_data *hapd, u8 *buf, size_t len, u16 stype,
struct hostapd_frame_info *fi)
{
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
int broadcast;
if (stype == WLAN_FC_STYPE_BEACON) {
handle_beacon(hapd, mgmt, len, fi);
return;
}
if (fi && fi->passive_scan)
return;
broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
if (!broadcast &&
os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
printf("MGMT: BSSID=" MACSTR " not our address\n",
MAC2STR(mgmt->bssid));
return;
}
if (stype == WLAN_FC_STYPE_PROBE_REQ) {
handle_probe_req(hapd, mgmt, len);
return;
}
if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"MGMT: DA=" MACSTR " not our address",
MAC2STR(mgmt->da));
return;
}
switch (stype) {
case WLAN_FC_STYPE_AUTH:
wpa_printf(MSG_DEBUG, "mgmt::auth");
handle_auth(hapd, mgmt, len);
break;
case WLAN_FC_STYPE_ASSOC_REQ:
wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
handle_assoc(hapd, mgmt, len, 0);
break;
case WLAN_FC_STYPE_REASSOC_REQ:
wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
handle_assoc(hapd, mgmt, len, 1);
break;
case WLAN_FC_STYPE_DISASSOC:
wpa_printf(MSG_DEBUG, "mgmt::disassoc");
handle_disassoc(hapd, mgmt, len);
break;
case WLAN_FC_STYPE_DEAUTH:
wpa_printf(MSG_DEBUG, "mgmt::deauth");
handle_deauth(hapd, mgmt, len);
break;
case WLAN_FC_STYPE_ACTION:
wpa_printf(MSG_DEBUG, "mgmt::action");
handle_action(hapd, mgmt, len);
break;
default:
hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"unknown mgmt frame subtype %d", stype);
break;
}
}
static void handle_auth_cb(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt,
size_t len, int ok)
{
u16 auth_alg, auth_transaction, status_code;
struct sta_info *sta;
if (!ok) {
hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_NOTICE,
"did not acknowledge authentication response");
return;
}
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
printf("handle_auth_cb - too short payload (len=%lu)\n",
(unsigned long) len);
return;
}
auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
status_code = le_to_host16(mgmt->u.auth.status_code);
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
printf("handle_auth_cb: STA " MACSTR " not found\n",
MAC2STR(mgmt->da));
return;
}
if (status_code == WLAN_STATUS_SUCCESS &&
((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
(auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO, "authenticated");
sta->flags |= WLAN_STA_AUTH;
}
}
static void handle_assoc_cb(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt,
size_t len, int reassoc, int ok)
{
u16 status;
struct sta_info *sta;
int new_assoc = 1;
struct ht_cap_ie *ht_cap = NULL;
if (!ok) {
hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"did not acknowledge association response");
return;
}
if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
sizeof(mgmt->u.assoc_resp))) {
printf("handle_assoc_cb(reassoc=%d) - too short payload "
"(len=%lu)\n", reassoc, (unsigned long) len);
return;
}
if (reassoc)
status = le_to_host16(mgmt->u.reassoc_resp.status_code);
else
status = le_to_host16(mgmt->u.assoc_resp.status_code);
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
printf("handle_assoc_cb: STA " MACSTR " not found\n",
MAC2STR(mgmt->da));
return;
}
if (status != WLAN_STATUS_SUCCESS)
goto fail;
/* Stop previous accounting session, if one is started, and allocate
* new session id for the new session. */
accounting_sta_stop(hapd, sta);
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO,
"associated (aid %d)",
sta->aid);
if (sta->flags & WLAN_STA_ASSOC)
new_assoc = 0;
sta->flags |= WLAN_STA_ASSOC;
if (reassoc)
mlme_reassociate_indication(hapd, sta);
else
mlme_associate_indication(hapd, sta);
#ifdef CONFIG_IEEE80211N
if (sta->flags & WLAN_STA_HT)
ht_cap = &sta->ht_capabilities;
#endif /* CONFIG_IEEE80211N */
#ifdef CONFIG_IEEE80211W
sta->sa_query_timed_out = 0;
#endif /* CONFIG_IEEE80211W */
if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid,
sta->capability, sta->supported_rates,
sta->supported_rates_len, 0, sta->listen_interval,
ht_cap))
{
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_NOTICE,
"Could not add STA to kernel driver");
}
if (sta->eapol_sm == NULL) {
/*
* This STA does not use RADIUS server for EAP authentication,
* so bind it to the selected VLAN interface now, since the
* interface selection is not going to change anymore.
*/
ap_sta_bind_vlan(hapd, sta, 0);
} else if (sta->vlan_id) {
/* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
ap_sta_bind_vlan(hapd, sta, 0);
}
if (sta->flags & WLAN_STA_SHORT_PREAMBLE) {
hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
WLAN_STA_SHORT_PREAMBLE, ~0);
} else {
hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
0, ~WLAN_STA_SHORT_PREAMBLE);
}
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);
hostapd_new_assoc_sta(hapd, sta, !new_assoc);
ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
fail:
/* Copy of the association request is not needed anymore */
if (sta->last_assoc_req) {
os_free(sta->last_assoc_req);
sta->last_assoc_req = NULL;
}
}
/**
* ieee802_11_mgmt_cb - Process management frame TX status callback
* @hapd: hostapd BSS data structure (the BSS from which the management frame
* was sent from)
* @buf: management frame data (starting from IEEE 802.11 header)
* @len: length of frame data in octets
* @stype: management frame subtype from frame control field
* @ok: Whether the frame was ACK'ed
*/
void ieee802_11_mgmt_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
u16 stype, int ok)
{
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
switch (stype) {
case WLAN_FC_STYPE_AUTH:
wpa_printf(MSG_DEBUG, "mgmt::auth cb");
handle_auth_cb(hapd, mgmt, len, ok);
break;
case WLAN_FC_STYPE_ASSOC_RESP:
wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
handle_assoc_cb(hapd, mgmt, len, 0, ok);
break;
case WLAN_FC_STYPE_REASSOC_RESP:
wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
handle_assoc_cb(hapd, mgmt, len, 1, ok);
break;
case WLAN_FC_STYPE_PROBE_RESP:
wpa_printf(MSG_DEBUG, "mgmt::proberesp cb");
break;
case WLAN_FC_STYPE_DEAUTH:
/* ignore */
break;
case WLAN_FC_STYPE_ACTION:
wpa_printf(MSG_DEBUG, "mgmt::action cb");
break;
default:
printf("unknown mgmt cb frame subtype %d\n", stype);
break;
}
}
static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
void *timeout_ctx)
{
struct hostapd_data *hapd = eloop_ctx;
hapd->tkip_countermeasures = 0;
hostapd_set_countermeasures(hapd, 0);
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
}
static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
{
struct sta_info *sta;
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
wpa_auth_countermeasures_start(hapd->wpa_auth);
hapd->tkip_countermeasures = 1;
hostapd_set_countermeasures(hapd, 1);
wpa_gtk_rekey(hapd->wpa_auth);
eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
hapd, NULL);
for (sta = hapd->sta_list; sta != NULL; sta = sta->next) {
hostapd_sta_deauth(hapd, sta->addr,
WLAN_REASON_MICHAEL_MIC_FAILURE);
sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
WLAN_STA_AUTHORIZED);
hostapd_sta_remove(hapd, sta->addr);
}
}
void ieee80211_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr,
int local)
{
time_t now;
if (addr && local) {
struct sta_info *sta = ap_get_sta(hapd, addr);
if (sta != NULL) {
wpa_auth_sta_local_mic_failure_report(sta->wpa_sm);
hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO,
"Michael MIC failure detected in "
"received frame");
mlme_michaelmicfailure_indication(hapd, addr);
} else {
wpa_printf(MSG_DEBUG,
"MLME-MICHAELMICFAILURE.indication "
"for not associated STA (" MACSTR
") ignored", MAC2STR(addr));
return;
}
}
time(&now);
if (now > hapd->michael_mic_failure + 60) {
hapd->michael_mic_failures = 1;
} else {
hapd->michael_mic_failures++;
if (hapd->michael_mic_failures > 1)
ieee80211_tkip_countermeasures_start(hapd);
}
hapd->michael_mic_failure = now;
}
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;
}
#endif /* CONFIG_NATIVE_WINDOWS */
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