/*
* wpa_supplicant - SME
* Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "common/wpa_common.h"
#include "common/sae.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/pmksa_cache.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "wpas_glue.h"
#include "wps_supplicant.h"
#include "p2p_supplicant.h"
#include "notify.h"
#include "bss.h"
#include "scan.h"
#include "sme.h"
#include "hs20_supplicant.h"
#define SME_AUTH_TIMEOUT 5
#define SME_ASSOC_TIMEOUT 5
static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
#ifdef CONFIG_IEEE80211W
static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_SAE
static int index_within_array(const int *array, int idx)
{
int i;
for (i = 0; i < idx; i++) {
if (array[i] <= 0)
return 0;
}
return 1;
}
static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
{
int *groups = wpa_s->conf->sae_groups;
int default_groups[] = { 19, 20, 21, 25, 26, 0 };
if (!groups || groups[0] <= 0)
groups = default_groups;
/* Configuration may have changed, so validate current index */
if (!index_within_array(groups, wpa_s->sme.sae_group_index))
return -1;
for (;;) {
int group = groups[wpa_s->sme.sae_group_index];
if (group <= 0)
break;
if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
wpa_s->sme.sae.group);
return 0;
}
wpa_s->sme.sae_group_index++;
}
return -1;
}
static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
const u8 *bssid)
{
struct wpabuf *buf;
size_t len;
if (ssid->passphrase == NULL) {
wpa_printf(MSG_DEBUG, "SAE: No password available");
return NULL;
}
if (sme_set_sae_group(wpa_s) < 0) {
wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
return NULL;
}
if (sae_prepare_commit(wpa_s->own_addr, bssid,
(u8 *) ssid->passphrase,
os_strlen(ssid->passphrase),
&wpa_s->sme.sae) < 0) {
wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
return NULL;
}
len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
if (buf == NULL)
return NULL;
wpabuf_put_le16(buf, 1); /* Transaction seq# */
wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
return buf;
}
static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
{
struct wpabuf *buf;
buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
if (buf == NULL)
return NULL;
wpabuf_put_le16(buf, 2); /* Transaction seq# */
wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
sae_write_confirm(&wpa_s->sme.sae, buf);
return buf;
}
#endif /* CONFIG_SAE */
/**
* sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt
* @wpa_s: Pointer to wpa_supplicant data
* @bss: Pointer to the bss which is the target of authentication attempt
*/
static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss)
{
const u8 rrm_ie_len = 5;
u8 *pos;
const u8 *rrm_ie;
wpa_s->rrm.rrm_used = 0;
wpa_printf(MSG_DEBUG,
"RRM: Determining whether RRM can be used - device support: 0x%x",
wpa_s->drv_rrm_flags);
rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES);
if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) {
wpa_printf(MSG_DEBUG, "RRM: No RRM in network");
return;
}
if (!(wpa_s->drv_rrm_flags &
WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) ||
!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) {
wpa_printf(MSG_DEBUG,
"RRM: Insufficient RRM support in driver - do not use RRM");
return;
}
if (sizeof(wpa_s->sme.assoc_req_ie) <
wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) {
wpa_printf(MSG_INFO,
"RRM: Unable to use RRM, no room for RRM IE");
return;
}
wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
os_memset(pos, 0, 2 + rrm_ie_len);
*pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
*pos++ = rrm_ie_len;
/* Set supported capabilites flags */
if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
*pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
wpa_s->rrm.rrm_used = 1;
}
static void sme_send_authentication(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss, struct wpa_ssid *ssid,
int start)
{
struct wpa_driver_auth_params params;
struct wpa_ssid *old_ssid;
#ifdef CONFIG_IEEE80211R
const u8 *ie;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211R
const u8 *md = NULL;
#endif /* CONFIG_IEEE80211R */
int i, bssid_changed;
struct wpabuf *resp = NULL;
u8 ext_capab[18];
int ext_capab_len;
int skip_auth;
#ifdef CONFIG_MBO
const u8 *mbo;
#endif /* CONFIG_MBO */
if (bss == NULL) {
wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
"the network");
wpas_connect_work_done(wpa_s);
return;
}
skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
wpa_s->reassoc_same_bss;
wpa_s->current_bss = bss;
os_memset(¶ms, 0, sizeof(params));
wpa_s->reassociate = 0;
params.freq = bss->freq;
params.bssid = bss->bssid;
params.ssid = bss->ssid;
params.ssid_len = bss->ssid_len;
params.p2p = ssid->p2p_group;
if (wpa_s->sme.ssid_len != params.ssid_len ||
os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
wpa_s->sme.prev_bssid_set = 0;
wpa_s->sme.freq = params.freq;
os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
wpa_s->sme.ssid_len = params.ssid_len;
params.auth_alg = WPA_AUTH_ALG_OPEN;
#ifdef IEEE8021X_EAPOL
if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
if (ssid->leap) {
if (ssid->non_leap == 0)
params.auth_alg = WPA_AUTH_ALG_LEAP;
else
params.auth_alg |= WPA_AUTH_ALG_LEAP;
}
}
#endif /* IEEE8021X_EAPOL */
wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
params.auth_alg);
if (ssid->auth_alg) {
params.auth_alg = ssid->auth_alg;
wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
"0x%x", params.auth_alg);
}
#ifdef CONFIG_SAE
wpa_s->sme.sae_pmksa_caching = 0;
if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
const u8 *rsn;
struct wpa_ie_data ied;
rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
if (!rsn) {
wpa_dbg(wpa_s, MSG_DEBUG,
"SAE enabled, but target BSS does not advertise RSN");
} else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
wpa_key_mgmt_sae(ied.key_mgmt)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
params.auth_alg = WPA_AUTH_ALG_SAE;
} else {
wpa_dbg(wpa_s, MSG_DEBUG,
"SAE enabled, but target BSS does not advertise SAE AKM for RSN");
}
}
#endif /* CONFIG_SAE */
for (i = 0; i < NUM_WEP_KEYS; i++) {
if (ssid->wep_key_len[i])
params.wep_key[i] = ssid->wep_key[i];
params.wep_key_len[i] = ssid->wep_key_len[i];
}
params.wep_tx_keyidx = ssid->wep_tx_keyidx;
bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
os_memset(wpa_s->bssid, 0, ETH_ALEN);
os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
if (bssid_changed)
wpas_notify_bssid_changed(wpa_s);
if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
wpa_key_mgmt_wpa(ssid->key_mgmt)) {
int try_opportunistic;
try_opportunistic = (ssid->proactive_key_caching < 0 ?
wpa_s->conf->okc :
ssid->proactive_key_caching) &&
(ssid->proto & WPA_PROTO_RSN);
if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
wpa_s->current_ssid,
try_opportunistic) == 0)
eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
wpa_s->sme.assoc_req_ie,
&wpa_s->sme.assoc_req_ie_len)) {
wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
"key management and encryption suites");
wpas_connect_work_done(wpa_s);
return;
}
} else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
/*
* Both WPA and non-WPA IEEE 802.1X enabled in configuration -
* use non-WPA since the scan results did not indicate that the
* AP is using WPA or WPA2.
*/
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
wpa_s->sme.assoc_req_ie_len = 0;
} else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
wpa_s->sme.assoc_req_ie,
&wpa_s->sme.assoc_req_ie_len)) {
wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
"key management and encryption suites (no "
"scan results)");
wpas_connect_work_done(wpa_s);
return;
}
#ifdef CONFIG_WPS
} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
struct wpabuf *wps_ie;
wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
if (wps_ie && wpabuf_len(wps_ie) <=
sizeof(wpa_s->sme.assoc_req_ie)) {
wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
wpa_s->sme.assoc_req_ie_len);
} else
wpa_s->sme.assoc_req_ie_len = 0;
wpabuf_free(wps_ie);
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
#endif /* CONFIG_WPS */
} else {
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
wpa_s->sme.assoc_req_ie_len = 0;
}
#ifdef CONFIG_IEEE80211R
ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
md = ie + 2;
wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
if (md) {
/* Prepare for the next transition */
wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
}
if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
if (wpa_s->sme.assoc_req_ie_len + 5 <
sizeof(wpa_s->sme.assoc_req_ie)) {
struct rsn_mdie *mdie;
u8 *pos = wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len;
*pos++ = WLAN_EID_MOBILITY_DOMAIN;
*pos++ = sizeof(*mdie);
mdie = (struct rsn_mdie *) pos;
os_memcpy(mdie->mobility_domain, md,
MOBILITY_DOMAIN_ID_LEN);
mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
wpa_s->sme.assoc_req_ie_len += 5;
}
if (wpa_s->sme.ft_used &&
os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
wpa_sm_has_ptk(wpa_s->wpa)) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
"over-the-air");
params.auth_alg = WPA_AUTH_ALG_FT;
params.ie = wpa_s->sme.ft_ies;
params.ie_len = wpa_s->sme.ft_ies_len;
}
}
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
struct wpa_ie_data _ie;
if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
_ie.capabilities &
(WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
"MFP: require MFP");
wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
}
}
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_P2P
if (wpa_s->global->p2p) {
u8 *pos;
size_t len;
int res;
pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
len = sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len;
res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
ssid->p2p_group);
if (res >= 0)
wpa_s->sme.assoc_req_ie_len += res;
}
#endif /* CONFIG_P2P */
#ifdef CONFIG_FST
if (wpa_s->fst_ies) {
int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
sizeof(wpa_s->sme.assoc_req_ie)) {
os_memcpy(wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
wpabuf_head(wpa_s->fst_ies),
fst_ies_len);
wpa_s->sme.assoc_req_ie_len += fst_ies_len;
}
}
#endif /* CONFIG_FST */
sme_auth_handle_rrm(wpa_s, bss);
#ifdef CONFIG_MBO
mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
if (mbo) {
int len;
len = wpas_mbo_supp_op_class_ie(
wpa_s, bss->freq,
wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len);
if (len > 0)
wpa_s->sme.assoc_req_ie_len += len;
}
#endif /* CONFIG_MBO */
ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
sizeof(ext_capab));
if (ext_capab_len > 0) {
u8 *pos = wpa_s->sme.assoc_req_ie;
if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
pos += 2 + pos[1];
os_memmove(pos + ext_capab_len, pos,
wpa_s->sme.assoc_req_ie_len -
(pos - wpa_s->sme.assoc_req_ie));
wpa_s->sme.assoc_req_ie_len += ext_capab_len;
os_memcpy(pos, ext_capab, ext_capab_len);
}
#ifdef CONFIG_HS20
if (is_hs20_network(wpa_s, ssid, bss)) {
struct wpabuf *hs20;
hs20 = wpabuf_alloc(20);
if (hs20) {
int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
size_t len;
wpas_hs20_add_indication(hs20, pps_mo_id);
len = sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len;
if (wpabuf_len(hs20) <= len) {
os_memcpy(wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
wpabuf_head(hs20), wpabuf_len(hs20));
wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
}
wpabuf_free(hs20);
}
}
#endif /* CONFIG_HS20 */
if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
size_t len;
len = sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len;
if (wpabuf_len(buf) <= len) {
os_memcpy(wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
wpabuf_head(buf), wpabuf_len(buf));
wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
}
}
#ifdef CONFIG_MBO
if (mbo) {
int len;
len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len);
if (len >= 0)
wpa_s->sme.assoc_req_ie_len += len;
}
#endif /* CONFIG_MBO */
#ifdef CONFIG_SAE
if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
{
wpa_dbg(wpa_s, MSG_DEBUG,
"PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
params.auth_alg = WPA_AUTH_ALG_OPEN;
wpa_s->sme.sae_pmksa_caching = 1;
}
if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
if (start)
resp = sme_auth_build_sae_commit(wpa_s, ssid,
bss->bssid);
else
resp = sme_auth_build_sae_confirm(wpa_s);
if (resp == NULL) {
wpas_connection_failed(wpa_s, bss->bssid);
return;
}
params.sae_data = wpabuf_head(resp);
params.sae_data_len = wpabuf_len(resp);
wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
}
#endif /* CONFIG_SAE */
wpa_supplicant_cancel_sched_scan(wpa_s);
wpa_supplicant_cancel_scan(wpa_s);
wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
wpa_clear_keys(wpa_s, bss->bssid);
wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
old_ssid = wpa_s->current_ssid;
wpa_s->current_ssid = ssid;
wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
wpa_supplicant_initiate_eapol(wpa_s);
if (old_ssid != wpa_s->current_ssid)
wpas_notify_network_changed(wpa_s);
#ifdef CONFIG_P2P
/*
* If multi-channel concurrency is not supported, check for any
* frequency conflict. In case of any frequency conflict, remove the
* least prioritized connection.
*/
if (wpa_s->num_multichan_concurrent < 2) {
int freq, num;
num = get_shared_radio_freqs(wpa_s, &freq, 1);
if (num > 0 && freq > 0 && freq != params.freq) {
wpa_printf(MSG_DEBUG,
"Conflicting frequency found (%d != %d)",
freq, params.freq);
if (wpas_p2p_handle_frequency_conflicts(wpa_s,
params.freq,
ssid) < 0) {
wpas_connection_failed(wpa_s, bss->bssid);
wpa_supplicant_mark_disassoc(wpa_s);
wpabuf_free(resp);
wpas_connect_work_done(wpa_s);
return;
}
}
}
#endif /* CONFIG_P2P */
if (skip_auth) {
wpa_msg(wpa_s, MSG_DEBUG,
"SME: Skip authentication step on reassoc-to-same-BSS");
wpabuf_free(resp);
sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
return;
}
wpa_s->sme.auth_alg = params.auth_alg;
if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
"driver failed");
wpas_connection_failed(wpa_s, bss->bssid);
wpa_supplicant_mark_disassoc(wpa_s);
wpabuf_free(resp);
wpas_connect_work_done(wpa_s);
return;
}
eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
NULL);
/*
* Association will be started based on the authentication event from
* the driver.
*/
wpabuf_free(resp);
}
static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
{
struct wpa_connect_work *cwork = work->ctx;
struct wpa_supplicant *wpa_s = work->wpa_s;
if (deinit) {
if (work->started)
wpa_s->connect_work = NULL;
wpas_connect_work_free(cwork);
return;
}
wpa_s->connect_work = work;
if (cwork->bss_removed ||
!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
wpas_network_disabled(wpa_s, cwork->ssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
wpas_connect_work_done(wpa_s);
return;
}
sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
}
void sme_authenticate(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss, struct wpa_ssid *ssid)
{
struct wpa_connect_work *cwork;
if (bss == NULL || ssid == NULL)
return;
if (wpa_s->connect_work) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
return;
}
if (radio_work_pending(wpa_s, "sme-connect")) {
/*
* The previous sme-connect work might no longer be valid due to
* the fact that the BSS list was updated. In addition, it makes
* sense to adhere to the 'newer' decision.
*/
wpa_dbg(wpa_s, MSG_DEBUG,
"SME: Remove previous pending sme-connect");
radio_remove_works(wpa_s, "sme-connect", 0);
}
wpas_abort_ongoing_scan(wpa_s);
cwork = os_zalloc(sizeof(*cwork));
if (cwork == NULL)
return;
cwork->bss = bss;
cwork->ssid = ssid;
cwork->sme = 1;
#ifdef CONFIG_SAE
wpa_s->sme.sae.state = SAE_NOTHING;
wpa_s->sme.sae.send_confirm = 0;
wpa_s->sme.sae_group_index = 0;
#endif /* CONFIG_SAE */
if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
sme_auth_start_cb, cwork) < 0)
wpas_connect_work_free(cwork);
}
#ifdef CONFIG_SAE
static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
u16 status_code, const u8 *data, size_t len)
{
int *groups;
wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
"status code %u", auth_transaction, status_code);
if (auth_transaction == 1 &&
status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
wpa_s->sme.sae.state == SAE_COMMITTED &&
wpa_s->current_bss && wpa_s->current_ssid) {
int default_groups[] = { 19, 20, 21, 25, 26, 0 };
u16 group;
groups = wpa_s->conf->sae_groups;
if (!groups || groups[0] <= 0)
groups = default_groups;
if (len < sizeof(le16)) {
wpa_dbg(wpa_s, MSG_DEBUG,
"SME: Too short SAE anti-clogging token request");
return -1;
}
group = WPA_GET_LE16(data);
wpa_dbg(wpa_s, MSG_DEBUG,
"SME: SAE anti-clogging token requested (group %u)",
group);
if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
WLAN_STATUS_SUCCESS) {
wpa_dbg(wpa_s, MSG_ERROR,
"SME: SAE group %u of anti-clogging request is invalid",
group);
return -1;
}
wpabuf_free(wpa_s->sme.sae_token);
wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
len - sizeof(le16));
sme_send_authentication(wpa_s, wpa_s->current_bss,
wpa_s->current_ssid, 1);
return 0;
}
if (auth_transaction == 1 &&
status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
wpa_s->sme.sae.state == SAE_COMMITTED &&
wpa_s->current_bss && wpa_s->current_ssid) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
wpa_s->sme.sae_group_index++;
if (sme_set_sae_group(wpa_s) < 0)
return -1; /* no other groups enabled */
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
sme_send_authentication(wpa_s, wpa_s->current_bss,
wpa_s->current_ssid, 1);
return 0;
}
if (status_code != WLAN_STATUS_SUCCESS)
return -1;
if (auth_transaction == 1) {
u16 res;
groups = wpa_s->conf->sae_groups;
wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
if (wpa_s->current_bss == NULL ||
wpa_s->current_ssid == NULL)
return -1;
if (wpa_s->sme.sae.state != SAE_COMMITTED)
return -1;
if (groups && groups[0] <= 0)
groups = NULL;
res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
groups);
if (res == SAE_SILENTLY_DISCARD) {
wpa_printf(MSG_DEBUG,
"SAE: Drop commit message due to reflection attack");
return 0;
}
if (res != WLAN_STATUS_SUCCESS)
return -1;
if (sae_process_commit(&wpa_s->sme.sae) < 0) {
wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
"commit");
return -1;
}
wpabuf_free(wpa_s->sme.sae_token);
wpa_s->sme.sae_token = NULL;
sme_send_authentication(wpa_s, wpa_s->current_bss,
wpa_s->current_ssid, 0);
return 0;
} else if (auth_transaction == 2) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
if (wpa_s->sme.sae.state != SAE_CONFIRMED)
return -1;
if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
return -1;
wpa_s->sme.sae.state = SAE_ACCEPTED;
sae_clear_temp_data(&wpa_s->sme.sae);
return 1;
}
return -1;
}
#endif /* CONFIG_SAE */
void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (ssid == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
"when network is not selected");
return;
}
if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
"when not in authenticating state");
return;
}
if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
"unexpected peer " MACSTR,
MAC2STR(data->auth.peer));
return;
}
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
" auth_type=%d auth_transaction=%d status_code=%d",
MAC2STR(data->auth.peer), data->auth.auth_type,
data->auth.auth_transaction, data->auth.status_code);
wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
data->auth.ies, data->auth.ies_len);
eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
#ifdef CONFIG_SAE
if (data->auth.auth_type == WLAN_AUTH_SAE) {
int res;
res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
data->auth.status_code, data->auth.ies,
data->auth.ies_len);
if (res < 0) {
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
}
if (res != 1)
return;
wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
"4-way handshake");
wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
wpa_s->sme.sae.pmkid, wpa_s->pending_bssid);
}
#endif /* CONFIG_SAE */
if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
char *ie_txt = NULL;
if (data->auth.ies && data->auth.ies_len) {
size_t buflen = 2 * data->auth.ies_len + 1;
ie_txt = os_malloc(buflen);
if (ie_txt) {
wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
data->auth.ies_len);
}
}
wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
" auth_type=%u auth_transaction=%u status_code=%u ie=%s",
MAC2STR(data->auth.peer), data->auth.auth_type,
data->auth.auth_transaction, data->auth.status_code,
ie_txt);
os_free(ie_txt);
if (data->auth.status_code !=
WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
wpa_s->sme.auth_alg == data->auth.auth_type ||
wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
return;
}
wpas_connect_work_done(wpa_s);
switch (data->auth.auth_type) {
case WLAN_AUTH_OPEN:
wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
wpa_s->current_ssid);
return;
case WLAN_AUTH_SHARED_KEY:
wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
wpa_s->current_ssid);
return;
default:
return;
}
}
#ifdef CONFIG_IEEE80211R
if (data->auth.auth_type == WLAN_AUTH_FT) {
if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
data->auth.ies_len, 0,
data->auth.peer, NULL, 0) < 0) {
wpa_dbg(wpa_s, MSG_DEBUG,
"SME: FT Authentication response processing failed");
wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
MACSTR
" reason=%d locally_generated=1",
MAC2STR(wpa_s->pending_bssid),
WLAN_REASON_DEAUTH_LEAVING);
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
wpa_supplicant_mark_disassoc(wpa_s);
return;
}
}
#endif /* CONFIG_IEEE80211R */
sme_associate(wpa_s, ssid->mode, data->auth.peer,
data->auth.auth_type);
}
void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
const u8 *bssid, u16 auth_type)
{
struct wpa_driver_associate_params params;
struct ieee802_11_elems elems;
#ifdef CONFIG_HT_OVERRIDES
struct ieee80211_ht_capabilities htcaps;
struct ieee80211_ht_capabilities htcaps_mask;
#endif /* CONFIG_HT_OVERRIDES */
#ifdef CONFIG_VHT_OVERRIDES
struct ieee80211_vht_capabilities vhtcaps;
struct ieee80211_vht_capabilities vhtcaps_mask;
#endif /* CONFIG_VHT_OVERRIDES */
os_memset(¶ms, 0, sizeof(params));
params.bssid = bssid;
params.ssid = wpa_s->sme.ssid;
params.ssid_len = wpa_s->sme.ssid_len;
params.freq.freq = wpa_s->sme.freq;
params.bg_scan_period = wpa_s->current_ssid ?
wpa_s->current_ssid->bg_scan_period : -1;
params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
wpa_s->sme.assoc_req_ie : NULL;
params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
params.pairwise_suite = wpa_s->pairwise_cipher;
params.group_suite = wpa_s->group_cipher;
params.key_mgmt_suite = wpa_s->key_mgmt;
params.wpa_proto = wpa_s->wpa_proto;
#ifdef CONFIG_HT_OVERRIDES
os_memset(&htcaps, 0, sizeof(htcaps));
os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
params.htcaps = (u8 *) &htcaps;
params.htcaps_mask = (u8 *) &htcaps_mask;
wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
#endif /* CONFIG_HT_OVERRIDES */
#ifdef CONFIG_VHT_OVERRIDES
os_memset(&vhtcaps, 0, sizeof(vhtcaps));
os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
params.vhtcaps = &vhtcaps;
params.vhtcaps_mask = &vhtcaps_mask;
wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
#endif /* CONFIG_VHT_OVERRIDES */
#ifdef CONFIG_IEEE80211R
if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
params.wpa_ie = wpa_s->sme.ft_ies;
params.wpa_ie_len = wpa_s->sme.ft_ies_len;
}
#endif /* CONFIG_IEEE80211R */
params.mode = mode;
params.mgmt_frame_protection = wpa_s->sme.mfp;
params.rrm_used = wpa_s->rrm.rrm_used;
if (wpa_s->sme.prev_bssid_set)
params.prev_bssid = wpa_s->sme.prev_bssid;
wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
params.freq.freq);
wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
if (params.wpa_ie == NULL ||
ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
< 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
os_memset(&elems, 0, sizeof(elems));
}
if (elems.rsn_ie) {
params.wpa_proto = WPA_PROTO_RSN;
wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
elems.rsn_ie_len + 2);
} else if (elems.wpa_ie) {
params.wpa_proto = WPA_PROTO_WPA;
wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
elems.wpa_ie_len + 2);
} else if (elems.osen) {
params.wpa_proto = WPA_PROTO_OSEN;
wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
elems.osen_len + 2);
} else
wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
params.p2p = 1;
if (wpa_s->p2pdev->set_sta_uapsd)
params.uapsd = wpa_s->p2pdev->sta_uapsd;
else
params.uapsd = -1;
if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
"driver failed");
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
return;
}
eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
NULL);
}
int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
const u8 *ies, size_t ies_len)
{
if (md == NULL || ies == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
os_free(wpa_s->sme.ft_ies);
wpa_s->sme.ft_ies = NULL;
wpa_s->sme.ft_ies_len = 0;
wpa_s->sme.ft_used = 0;
return 0;
}
os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
os_free(wpa_s->sme.ft_ies);
wpa_s->sme.ft_ies = os_malloc(ies_len);
if (wpa_s->sme.ft_ies == NULL)
return -1;
os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
wpa_s->sme.ft_ies_len = ies_len;
return 0;
}
static void sme_deauth(struct wpa_supplicant *wpa_s)
{
int bssid_changed;
bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
WLAN_REASON_DEAUTH_LEAVING) < 0) {
wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
"failed");
}
wpa_s->sme.prev_bssid_set = 0;
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
os_memset(wpa_s->bssid, 0, ETH_ALEN);
os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
if (bssid_changed)
wpas_notify_bssid_changed(wpa_s);
}
void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
"status code %d", MAC2STR(wpa_s->pending_bssid),
data->assoc_reject.status_code);
eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
#ifdef CONFIG_SAE
if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
wpa_dbg(wpa_s, MSG_DEBUG,
"PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
wpa_sm_aborted_cached(wpa_s->wpa);
wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
if (wpa_s->current_bss) {
struct wpa_bss *bss = wpa_s->current_bss;
struct wpa_ssid *ssid = wpa_s->current_ssid;
wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
WLAN_REASON_DEAUTH_LEAVING);
wpas_connect_work_done(wpa_s);
wpa_supplicant_mark_disassoc(wpa_s);
wpa_supplicant_connect(wpa_s, bss, ssid);
return;
}
}
#endif /* CONFIG_SAE */
/*
* For now, unconditionally terminate the previous authentication. In
* theory, this should not be needed, but mac80211 gets quite confused
* if the authentication is left pending.. Some roaming cases might
* benefit from using the previous authentication, so this could be
* optimized in the future.
*/
sme_deauth(wpa_s);
}
void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
wpa_supplicant_mark_disassoc(wpa_s);
}
void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
wpa_supplicant_mark_disassoc(wpa_s);
}
void sme_event_disassoc(struct wpa_supplicant *wpa_s,
struct disassoc_info *info)
{
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
if (wpa_s->sme.prev_bssid_set) {
/*
* cfg80211/mac80211 can get into somewhat confused state if
* the AP only disassociates us and leaves us in authenticated
* state. For now, force the state to be cleared to avoid
* confusing errors if we try to associate with the AP again.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
"driver state");
wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
WLAN_REASON_DEAUTH_LEAVING);
}
}
static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
sme_deauth(wpa_s);
}
}
static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->wpa_state == WPA_ASSOCIATING) {
wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
sme_deauth(wpa_s);
}
}
void sme_state_changed(struct wpa_supplicant *wpa_s)
{
/* Make sure timers are cleaned up appropriately. */
if (wpa_s->wpa_state != WPA_ASSOCIATING)
eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
if (wpa_s->wpa_state != WPA_AUTHENTICATING)
eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
}
void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
const u8 *prev_pending_bssid)
{
/*
* mac80211-workaround to force deauth on failed auth cmd,
* requires us to remain in authenticating state to allow the
* second authentication attempt to be continued properly.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
"to proceed after disconnection event");
wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
/*
* Re-arm authentication timer in case auth fails for whatever reason.
*/
eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
NULL);
}
void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
{
wpa_s->sme.prev_bssid_set = 0;
#ifdef CONFIG_SAE
wpabuf_free(wpa_s->sme.sae_token);
wpa_s->sme.sae_token = NULL;
sae_clear_data(&wpa_s->sme.sae);
#endif /* CONFIG_SAE */
#ifdef CONFIG_IEEE80211R
if (wpa_s->sme.ft_ies)
sme_update_ft_ies(wpa_s, NULL, NULL, 0);
#endif /* CONFIG_IEEE80211R */
}
void sme_deinit(struct wpa_supplicant *wpa_s)
{
os_free(wpa_s->sme.ft_ies);
wpa_s->sme.ft_ies = NULL;
wpa_s->sme.ft_ies_len = 0;
#ifdef CONFIG_IEEE80211W
sme_stop_sa_query(wpa_s);
#endif /* CONFIG_IEEE80211W */
sme_clear_on_disassoc(wpa_s);
eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
}
static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
const u8 *chan_list, u8 num_channels,
u8 num_intol)
{
struct ieee80211_2040_bss_coex_ie *bc_ie;
struct ieee80211_2040_intol_chan_report *ic_report;
struct wpabuf *buf;
wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
" (num_channels=%u num_intol=%u)",
MAC2STR(wpa_s->bssid), num_channels, num_intol);
wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
chan_list, num_channels);
buf = wpabuf_alloc(2 + /* action.category + action_code */
sizeof(struct ieee80211_2040_bss_coex_ie) +
sizeof(struct ieee80211_2040_intol_chan_report) +
num_channels);
if (buf == NULL)
return;
wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
bc_ie->length = 1;
if (num_intol)
bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
if (num_channels > 0) {
ic_report = wpabuf_put(buf, sizeof(*ic_report));
ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
ic_report->length = num_channels + 1;
ic_report->op_class = 0;
os_memcpy(wpabuf_put(buf, num_channels), chan_list,
num_channels);
}
if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
wpa_s->own_addr, wpa_s->bssid,
wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
wpa_msg(wpa_s, MSG_INFO,
"SME: Failed to send 20/40 BSS Coexistence frame");
}
wpabuf_free(buf);
}
int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
const u8 *ie;
u16 ht_cap;
u8 chan_list[P2P_MAX_CHANNELS], channel;
u8 num_channels = 0, num_intol = 0, i;
if (!wpa_s->sme.sched_obss_scan)
return 0;
wpa_s->sme.sched_obss_scan = 0;
if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
return 1;
/*
* Check whether AP uses regulatory triplet or channel triplet in
* country info. Right now the operating class of the BSS channel
* width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
* based on the assumption that operating class triplet is not used in
* beacon frame. If the First Channel Number/Operating Extension
* Identifier octet has a positive integer value of 201 or greater,
* then its operating class triplet.
*
* TODO: If Supported Operating Classes element is present in beacon
* frame, have to lookup operating class in Annex E and fill them in
* 2040 coex frame.
*/
ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
if (ie && (ie[1] >= 6) && (ie[5] >= 201))
return 1;
os_memset(chan_list, 0, sizeof(chan_list));
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
/* Skip other band bss */
enum hostapd_hw_mode mode;
mode = ieee80211_freq_to_chan(bss->freq, &channel);
if (mode != HOSTAPD_MODE_IEEE80211G &&
mode != HOSTAPD_MODE_IEEE80211B)
continue;
ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
" freq=%u chan=%u ht_cap=0x%x",
MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
num_intol++;
/* Check whether the channel is already considered */
for (i = 0; i < num_channels; i++) {
if (channel == chan_list[i])
break;
}
if (i != num_channels)
continue;
chan_list[num_channels++] = channel;
}
}
sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
return 1;
}
static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
struct wpa_driver_scan_params *params)
{
/* Include only affected channels */
struct hostapd_hw_modes *mode;
int count, i;
int start, end;
mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
HOSTAPD_MODE_IEEE80211G);
if (mode == NULL) {
/* No channels supported in this band - use empty list */
params->freqs = os_zalloc(sizeof(int));
return;
}
if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
wpa_s->current_bss) {
const u8 *ie;
ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
if (ie && ie[1] >= 2) {
u8 o;
o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
}
}
start = wpa_s->assoc_freq - 10;
end = wpa_s->assoc_freq + 10;
switch (wpa_s->sme.ht_sec_chan) {
case HT_SEC_CHAN_UNKNOWN:
/* HT40+ possible on channels 1..9 */
if (wpa_s->assoc_freq <= 2452)
start -= 20;
/* HT40- possible on channels 5-13 */
if (wpa_s->assoc_freq >= 2432)
end += 20;
break;
case HT_SEC_CHAN_ABOVE:
end += 20;
break;
case HT_SEC_CHAN_BELOW:
start -= 20;
break;
}
wpa_printf(MSG_DEBUG,
"OBSS: assoc_freq %d possible affected range %d-%d",
wpa_s->assoc_freq, start, end);
params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
if (params->freqs == NULL)
return;
for (count = 0, i = 0; i < mode->num_channels; i++) {
int freq;
if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
continue;
freq = mode->channels[i].freq;
if (freq - 10 >= end || freq + 10 <= start)
continue; /* not affected */
params->freqs[count++] = freq;
}
}
static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
struct wpa_driver_scan_params params;
if (!wpa_s->current_bss) {
wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
return;
}
os_memset(¶ms, 0, sizeof(params));
wpa_obss_scan_freqs_list(wpa_s, ¶ms);
params.low_priority = 1;
wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
if (wpa_supplicant_trigger_scan(wpa_s, ¶ms))
wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
else
wpa_s->sme.sched_obss_scan = 1;
os_free(params.freqs);
eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
sme_obss_scan_timeout, wpa_s, NULL);
}
void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
{
const u8 *ie;
struct wpa_bss *bss = wpa_s->current_bss;
struct wpa_ssid *ssid = wpa_s->current_ssid;
struct hostapd_hw_modes *hw_mode = NULL;
int i;
eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
wpa_s->sme.sched_obss_scan = 0;
wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
if (!enable)
return;
/*
* Schedule OBSS scan if driver is using station SME in wpa_supplicant
* or it expects OBSS scan to be performed by wpa_supplicant.
*/
if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
(wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
return;
if (!wpa_s->hw.modes)
return;
/* only HT caps in 11g mode are relevant */
for (i = 0; i < wpa_s->hw.num_modes; i++) {
hw_mode = &wpa_s->hw.modes[i];
if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
break;
}
/* Driver does not support HT40 for 11g or doesn't have 11g. */
if (i == wpa_s->hw.num_modes || !hw_mode ||
!(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
return;
if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
return; /* Not associated on 2.4 GHz band */
/* Check whether AP supports HT40 */
ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
if (!ie || ie[1] < 2 ||
!(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
return; /* AP does not support HT40 */
ie = wpa_bss_get_ie(wpa_s->current_bss,
WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
if (!ie || ie[1] < 14)
return; /* AP does not request OBSS scans */
wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
if (wpa_s->sme.obss_scan_int < 10) {
wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
"replaced with the minimum 10 sec",
wpa_s->sme.obss_scan_int);
wpa_s->sme.obss_scan_int = 10;
}
wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
wpa_s->sme.obss_scan_int);
eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
sme_obss_scan_timeout, wpa_s, NULL);
}
#ifdef CONFIG_IEEE80211W
static const unsigned int sa_query_max_timeout = 1000;
static const unsigned int sa_query_retry_timeout = 201;
static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
{
u32 tu;
struct os_reltime now, passed;
os_get_reltime(&now);
os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
tu = (passed.sec * 1000000 + passed.usec) / 1024;
if (sa_query_max_timeout < tu) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
sme_stop_sa_query(wpa_s);
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
return 1;
}
return 0;
}
static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
const u8 *trans_id)
{
u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
MACSTR, MAC2STR(wpa_s->bssid));
wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
trans_id, WLAN_SA_QUERY_TR_ID_LEN);
req[0] = WLAN_ACTION_SA_QUERY;
req[1] = WLAN_SA_QUERY_REQUEST;
os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
wpa_s->own_addr, wpa_s->bssid,
req, sizeof(req), 0) < 0)
wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
"Request");
}
static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
unsigned int timeout, sec, usec;
u8 *trans_id, *nbuf;
if (wpa_s->sme.sa_query_count > 0 &&
sme_check_sa_query_timeout(wpa_s))
return;
nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
wpa_s->sme.sa_query_count + 1,
WLAN_SA_QUERY_TR_ID_LEN);
if (nbuf == NULL)
return;
if (wpa_s->sme.sa_query_count == 0) {
/* Starting a new SA Query procedure */
os_get_reltime(&wpa_s->sme.sa_query_start);
}
trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
wpa_s->sme.sa_query_trans_id = nbuf;
wpa_s->sme.sa_query_count++;
if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
return;
}
timeout = sa_query_retry_timeout;
sec = ((timeout / 1000) * 1024) / 1000;
usec = (timeout % 1000) * 1024;
eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
wpa_s->sme.sa_query_count);
sme_send_sa_query_req(wpa_s, trans_id);
}
static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
{
sme_sa_query_timer(wpa_s, NULL);
}
static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
os_free(wpa_s->sme.sa_query_trans_id);
wpa_s->sme.sa_query_trans_id = NULL;
wpa_s->sme.sa_query_count = 0;
}
void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
const u8 *da, u16 reason_code)
{
struct wpa_ssid *ssid;
struct os_reltime now;
if (wpa_s->wpa_state != WPA_COMPLETED)
return;
ssid = wpa_s->current_ssid;
if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
return;
if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
return;
if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
return;
if (wpa_s->sme.sa_query_count > 0)
return;
os_get_reltime(&now);
if (wpa_s->sme.last_unprot_disconnect.sec &&
!os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
return; /* limit SA Query procedure frequency */
wpa_s->sme.last_unprot_disconnect = now;
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
"possible AP/STA state mismatch - trigger SA Query");
sme_start_sa_query(wpa_s);
}
void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
const u8 *data, size_t len)
{
int i;
if (wpa_s->sme.sa_query_trans_id == NULL ||
len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
data[0] != WLAN_SA_QUERY_RESPONSE)
return;
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
return;
for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
if (os_memcmp(wpa_s->sme.sa_query_trans_id +
i * WLAN_SA_QUERY_TR_ID_LEN,
data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
break;
}
if (i >= wpa_s->sme.sa_query_count) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
"transaction identifier found");
return;
}
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
"from " MACSTR, MAC2STR(sa));
sme_stop_sa_query(wpa_s);
}
#endif /* CONFIG_IEEE80211W */