blob: 671fd749876297d132b0013fee642a2860fdd18f [file] [log] [blame]
/*
* WPA Supplicant - Driver event processing
* Copyright (c) 2003-2012, 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 "eapol_supp/eapol_supp_sm.h"
#include "rsn_supp/wpa.h"
#include "eloop.h"
#include "config.h"
#include "l2_packet/l2_packet.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "pcsc_funcs.h"
#include "rsn_supp/preauth.h"
#include "rsn_supp/pmksa_cache.h"
#include "common/wpa_ctrl.h"
#include "eap_peer/eap.h"
#include "ap/hostapd.h"
#include "p2p/p2p.h"
#include "wnm_sta.h"
#include "notify.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "crypto/random.h"
#include "blacklist.h"
#include "wpas_glue.h"
#include "wps_supplicant.h"
#include "ibss_rsn.h"
#include "sme.h"
#include "gas_query.h"
#include "p2p_supplicant.h"
#include "bgscan.h"
#include "autoscan.h"
#include "ap.h"
#include "bss.h"
#include "scan.h"
#include "offchannel.h"
#include "interworking.h"
static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s);
static int wpas_temp_disabled(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
struct os_time now;
if (ssid == NULL || ssid->disabled_until.sec == 0)
return 0;
os_get_time(&now);
if (ssid->disabled_until.sec > now.sec)
return ssid->disabled_until.sec - now.sec;
wpas_clear_temp_disabled(wpa_s, ssid, 0);
return 0;
}
static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid, *old_ssid;
int res;
if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
return 0;
wpa_dbg(wpa_s, MSG_DEBUG, "Select network based on association "
"information");
ssid = wpa_supplicant_get_ssid(wpa_s);
if (ssid == NULL) {
wpa_msg(wpa_s, MSG_INFO,
"No network configuration found for the current AP");
return -1;
}
if (wpas_network_disabled(wpa_s, ssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is disabled");
return -1;
}
if (disallowed_bssid(wpa_s, wpa_s->bssid) ||
disallowed_ssid(wpa_s, ssid->ssid, ssid->ssid_len)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS is disallowed");
return -1;
}
res = wpas_temp_disabled(wpa_s, ssid);
if (res > 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is temporarily "
"disabled for %d second(s)", res);
return -1;
}
wpa_dbg(wpa_s, MSG_DEBUG, "Network configuration found for the "
"current AP");
if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
u8 wpa_ie[80];
size_t wpa_ie_len = sizeof(wpa_ie);
if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
wpa_ie, &wpa_ie_len) < 0)
wpa_dbg(wpa_s, MSG_DEBUG, "Could not set WPA suites");
} else {
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
}
if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
eapol_sm_invalidate_cached_session(wpa_s->eapol);
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);
return 0;
}
void wpa_supplicant_stop_countermeasures(void *eloop_ctx, void *sock_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->countermeasures) {
wpa_s->countermeasures = 0;
wpa_drv_set_countermeasures(wpa_s, 0);
wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
}
void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
{
int bssid_changed;
wnm_bss_keep_alive_deinit(wpa_s);
#ifdef CONFIG_IBSS_RSN
ibss_rsn_deinit(wpa_s->ibss_rsn);
wpa_s->ibss_rsn = NULL;
#endif /* CONFIG_IBSS_RSN */
#ifdef CONFIG_AP
wpa_supplicant_ap_deinit(wpa_s);
#endif /* CONFIG_AP */
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
return;
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
#ifdef ANDROID
wpa_s->conf->ap_scan = DEFAULT_AP_SCAN;
#endif
bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
os_memset(wpa_s->bssid, 0, ETH_ALEN);
os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
#ifdef CONFIG_SME
wpa_s->sme.prev_bssid_set = 0;
#endif /* CONFIG_SME */
#ifdef CONFIG_P2P
os_memset(wpa_s->go_dev_addr, 0, ETH_ALEN);
#endif /* CONFIG_P2P */
wpa_s->current_bss = NULL;
wpa_s->assoc_freq = 0;
#ifdef CONFIG_IEEE80211R
#ifdef CONFIG_SME
if (wpa_s->sme.ft_ies)
sme_update_ft_ies(wpa_s, NULL, NULL, 0);
#endif /* CONFIG_SME */
#endif /* CONFIG_IEEE80211R */
if (bssid_changed)
wpas_notify_bssid_changed(wpa_s);
eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
wpa_s->ap_ies_from_associnfo = 0;
wpa_s->current_ssid = NULL;
wpa_s->key_mgmt = 0;
}
static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
{
struct wpa_ie_data ie;
int pmksa_set = -1;
size_t i;
if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
ie.pmkid == NULL)
return;
for (i = 0; i < ie.num_pmkid; i++) {
pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
ie.pmkid + i * PMKID_LEN,
NULL, NULL, 0);
if (pmksa_set == 0) {
eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
break;
}
}
wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from "
"PMKSA cache", pmksa_set == 0 ? "" : "not ");
}
static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
if (data == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, "RSN: No data in PMKID candidate "
"event");
return;
}
wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
" index=%d preauth=%d",
MAC2STR(data->pmkid_candidate.bssid),
data->pmkid_candidate.index,
data->pmkid_candidate.preauth);
pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
data->pmkid_candidate.index,
data->pmkid_candidate.preauth);
}
static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
{
if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
return 0;
#ifdef IEEE8021X_EAPOL
if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
wpa_s->current_ssid &&
!(wpa_s->current_ssid->eapol_flags &
(EAPOL_FLAG_REQUIRE_KEY_UNICAST |
EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
/* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
* plaintext or static WEP keys). */
return 0;
}
#endif /* IEEE8021X_EAPOL */
return 1;
}
/**
* wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
* @wpa_s: pointer to wpa_supplicant data
* @ssid: Configuration data for the network
* Returns: 0 on success, -1 on failure
*
* This function is called when starting authentication with a network that is
* configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
*/
int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
#ifdef IEEE8021X_EAPOL
#ifdef PCSC_FUNCS
int aka = 0, sim = 0, type;
if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
return 0;
if (ssid->eap.eap_methods == NULL) {
sim = 1;
aka = 1;
} else {
struct eap_method_type *eap = ssid->eap.eap_methods;
while (eap->vendor != EAP_VENDOR_IETF ||
eap->method != EAP_TYPE_NONE) {
if (eap->vendor == EAP_VENDOR_IETF) {
if (eap->method == EAP_TYPE_SIM)
sim = 1;
else if (eap->method == EAP_TYPE_AKA ||
eap->method == EAP_TYPE_AKA_PRIME)
aka = 1;
}
eap++;
}
}
if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
sim = 0;
if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL &&
eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA_PRIME) ==
NULL)
aka = 0;
if (!sim && !aka) {
wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to "
"use SIM, but neither EAP-SIM nor EAP-AKA are "
"enabled");
return 0;
}
wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to use SIM "
"(sim=%d aka=%d) - initialize PCSC", sim, aka);
if (sim && aka)
type = SCARD_TRY_BOTH;
else if (aka)
type = SCARD_USIM_ONLY;
else
type = SCARD_GSM_SIM_ONLY;
wpa_s->scard = scard_init(type, NULL);
if (wpa_s->scard == NULL) {
wpa_msg(wpa_s, MSG_WARNING, "Failed to initialize SIM "
"(pcsc-lite)");
return -1;
}
wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
#endif /* PCSC_FUNCS */
#endif /* IEEE8021X_EAPOL */
return 0;
}
#ifndef CONFIG_NO_SCAN_PROCESSING
static int wpa_supplicant_match_privacy(struct wpa_bss *bss,
struct wpa_ssid *ssid)
{
int i, privacy = 0;
if (ssid->mixed_cell)
return 1;
#ifdef CONFIG_WPS
if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
return 1;
#endif /* CONFIG_WPS */
for (i = 0; i < NUM_WEP_KEYS; i++) {
if (ssid->wep_key_len[i]) {
privacy = 1;
break;
}
}
#ifdef IEEE8021X_EAPOL
if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
privacy = 1;
#endif /* IEEE8021X_EAPOL */
if (wpa_key_mgmt_wpa(ssid->key_mgmt))
privacy = 1;
if (bss->caps & IEEE80211_CAP_PRIVACY)
return privacy;
return !privacy;
}
static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
struct wpa_bss *bss)
{
struct wpa_ie_data ie;
int proto_match = 0;
const u8 *rsn_ie, *wpa_ie;
int ret;
int wep_ok;
ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
if (ret >= 0)
return ret;
/* Allow TSN if local configuration accepts WEP use without WPA/WPA2 */
wep_ok = !wpa_key_mgmt_wpa(ssid->key_mgmt) &&
(((ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
ssid->wep_key_len[ssid->wep_tx_keyidx] > 0) ||
(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA));
rsn_ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
proto_match++;
if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - parse "
"failed");
break;
}
if (wep_ok &&
(ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
{
wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN "
"in RSN IE");
return 1;
}
if (!(ie.proto & ssid->proto)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - proto "
"mismatch");
break;
}
if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - PTK "
"cipher mismatch");
break;
}
if (!(ie.group_cipher & ssid->group_cipher)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - GTK "
"cipher mismatch");
break;
}
if (!(ie.key_mgmt & ssid->key_mgmt)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - key mgmt "
"mismatch");
break;
}
#ifdef CONFIG_IEEE80211W
if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
(ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
wpa_s->conf->pmf : ssid->ieee80211w) ==
MGMT_FRAME_PROTECTION_REQUIRED) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - no mgmt "
"frame protection");
break;
}
#endif /* CONFIG_IEEE80211W */
wpa_dbg(wpa_s, MSG_DEBUG, " selected based on RSN IE");
return 1;
}
wpa_ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
proto_match++;
if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - parse "
"failed");
break;
}
if (wep_ok &&
(ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
{
wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN "
"in WPA IE");
return 1;
}
if (!(ie.proto & ssid->proto)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - proto "
"mismatch");
break;
}
if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - PTK "
"cipher mismatch");
break;
}
if (!(ie.group_cipher & ssid->group_cipher)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - GTK "
"cipher mismatch");
break;
}
if (!(ie.key_mgmt & ssid->key_mgmt)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - key mgmt "
"mismatch");
break;
}
wpa_dbg(wpa_s, MSG_DEBUG, " selected based on WPA IE");
return 1;
}
if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && !wpa_ie &&
!rsn_ie) {
wpa_dbg(wpa_s, MSG_DEBUG, " allow for non-WPA IEEE 802.1X");
return 1;
}
if ((ssid->proto & (WPA_PROTO_WPA | WPA_PROTO_RSN)) &&
wpa_key_mgmt_wpa(ssid->key_mgmt) && proto_match == 0) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - no WPA/RSN proto match");
return 0;
}
if (!wpa_key_mgmt_wpa(ssid->key_mgmt)) {
wpa_dbg(wpa_s, MSG_DEBUG, " allow in non-WPA/WPA2");
return 1;
}
wpa_dbg(wpa_s, MSG_DEBUG, " reject due to mismatch with "
"WPA/WPA2");
return 0;
}
static int freq_allowed(int *freqs, int freq)
{
int i;
if (freqs == NULL)
return 1;
for (i = 0; freqs[i]; i++)
if (freqs[i] == freq)
return 1;
return 0;
}
static int ht_supported(const struct hostapd_hw_modes *mode)
{
if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) {
/*
* The driver did not indicate whether it supports HT. Assume
* it does to avoid connection issues.
*/
return 1;
}
/*
* IEEE Std 802.11n-2009 20.1.1:
* An HT non-AP STA shall support all EQM rates for one spatial stream.
*/
return mode->mcs_set[0] == 0xff;
}
static int rate_match(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
const struct hostapd_hw_modes *mode = NULL, *modes;
const u8 scan_ie[2] = { WLAN_EID_SUPP_RATES, WLAN_EID_EXT_SUPP_RATES };
const u8 *rate_ie;
int i, j, k;
if (bss->freq == 0)
return 1; /* Cannot do matching without knowing band */
modes = wpa_s->hw.modes;
if (modes == NULL) {
/*
* The driver does not provide any additional information
* about the utilized hardware, so allow the connection attempt
* to continue.
*/
return 1;
}
for (i = 0; i < wpa_s->hw.num_modes; i++) {
for (j = 0; j < modes[i].num_channels; j++) {
int freq = modes[i].channels[j].freq;
if (freq == bss->freq) {
if (mode &&
mode->mode == HOSTAPD_MODE_IEEE80211G)
break; /* do not allow 802.11b replace
* 802.11g */
mode = &modes[i];
break;
}
}
}
if (mode == NULL)
return 0;
for (i = 0; i < (int) sizeof(scan_ie); i++) {
rate_ie = wpa_bss_get_ie(bss, scan_ie[i]);
if (rate_ie == NULL)
continue;
for (j = 2; j < rate_ie[1] + 2; j++) {
int flagged = !!(rate_ie[j] & 0x80);
int r = (rate_ie[j] & 0x7f) * 5;
/*
* IEEE Std 802.11n-2009 7.3.2.2:
* The new BSS Membership selector value is encoded
* like a legacy basic rate, but it is not a rate and
* only indicates if the BSS members are required to
* support the mandatory features of Clause 20 [HT PHY]
* in order to join the BSS.
*/
if (flagged && ((rate_ie[j] & 0x7f) ==
BSS_MEMBERSHIP_SELECTOR_HT_PHY)) {
if (!ht_supported(mode)) {
wpa_dbg(wpa_s, MSG_DEBUG,
" hardware does not support "
"HT PHY");
return 0;
}
continue;
}
if (!flagged)
continue;
/* check for legacy basic rates */
for (k = 0; k < mode->num_rates; k++) {
if (mode->rates[k] == r)
break;
}
if (k == mode->num_rates) {
/*
* IEEE Std 802.11-2007 7.3.2.2 demands that in
* order to join a BSS all required rates
* have to be supported by the hardware.
*/
wpa_dbg(wpa_s, MSG_DEBUG, " hardware does "
"not support required rate %d.%d Mbps",
r / 10, r % 10);
return 0;
}
}
}
return 1;
}
static int bss_is_dmg(struct wpa_bss *bss)
{
return bss->freq > 45000;
}
/*
* Test whether BSS is in an ESS.
* This is done differently in DMG (60 GHz) and non-DMG bands
*/
static int bss_is_ess(struct wpa_bss *bss)
{
if (bss_is_dmg(bss)) {
return (bss->caps & IEEE80211_CAP_DMG_MASK) ==
IEEE80211_CAP_DMG_AP;
}
return ((bss->caps & (IEEE80211_CAP_ESS | IEEE80211_CAP_IBSS)) ==
IEEE80211_CAP_ESS);
}
static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
int i, struct wpa_bss *bss,
struct wpa_ssid *group)
{
u8 wpa_ie_len, rsn_ie_len;
int wpa;
struct wpa_blacklist *e;
const u8 *ie;
struct wpa_ssid *ssid;
ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
wpa_ie_len = ie ? ie[1] : 0;
ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
rsn_ie_len = ie ? ie[1] : 0;
wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
"wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d%s",
i, MAC2STR(bss->bssid), wpa_ssid_txt(bss->ssid, bss->ssid_len),
wpa_ie_len, rsn_ie_len, bss->caps, bss->level,
wpa_bss_get_vendor_ie(bss, WPS_IE_VENDOR_TYPE) ? " wps" : "");
e = wpa_blacklist_get(wpa_s, bss->bssid);
if (e) {
int limit = 1;
if (wpa_supplicant_enabled_networks(wpa_s) == 1) {
/*
* When only a single network is enabled, we can
* trigger blacklisting on the first failure. This
* should not be done with multiple enabled networks to
* avoid getting forced to move into a worse ESS on
* single error if there are no other BSSes of the
* current ESS.
*/
limit = 0;
}
if (e->count > limit) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted "
"(count=%d limit=%d)", e->count, limit);
return NULL;
}
}
if (bss->ssid_len == 0) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID not known");
return NULL;
}
if (disallowed_bssid(wpa_s, bss->bssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID disallowed");
return NULL;
}
if (disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID disallowed");
return NULL;
}
wpa = wpa_ie_len > 0 || rsn_ie_len > 0;
for (ssid = group; ssid; ssid = ssid->pnext) {
int check_ssid = wpa ? 1 : (ssid->ssid_len != 0);
int res;
if (wpas_network_disabled(wpa_s, ssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled");
continue;
}
res = wpas_temp_disabled(wpa_s, ssid);
if (res > 0) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled "
"temporarily for %d second(s)", res);
continue;
}
#ifdef CONFIG_WPS
if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && e && e->count > 0) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted "
"(WPS)");
continue;
}
if (wpa && ssid->ssid_len == 0 &&
wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
check_ssid = 0;
if (!wpa && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
/* Only allow wildcard SSID match if an AP
* advertises active WPS operation that matches
* with our mode. */
check_ssid = 1;
if (ssid->ssid_len == 0 &&
wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
check_ssid = 0;
}
#endif /* CONFIG_WPS */
if (ssid->bssid_set && ssid->ssid_len == 0 &&
os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0)
check_ssid = 0;
if (check_ssid &&
(bss->ssid_len != ssid->ssid_len ||
os_memcmp(bss->ssid, ssid->ssid, bss->ssid_len) != 0)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID mismatch");
continue;
}
if (ssid->bssid_set &&
os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID mismatch");
continue;
}
if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
continue;
if (!wpa &&
!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
!(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - non-WPA network "
"not allowed");
continue;
}
if (!wpa_supplicant_match_privacy(bss, ssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - privacy "
"mismatch");
continue;
}
if (!bss_is_ess(bss)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - not ESS network");
continue;
}
if (!freq_allowed(ssid->freq_list, bss->freq)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - frequency not "
"allowed");
continue;
}
if (!rate_match(wpa_s, bss)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - rate sets do "
"not match");
continue;
}
#ifdef CONFIG_P2P
/*
* TODO: skip the AP if its P2P IE has Group Formation
* bit set in the P2P Group Capability Bitmap and we
* are not in Group Formation with that device.
*/
#endif /* CONFIG_P2P */
/* Matching configuration found */
return ssid;
}
/* No matching configuration found */
return NULL;
}
static struct wpa_bss *
wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
struct wpa_ssid *group,
struct wpa_ssid **selected_ssid)
{
unsigned int i;
wpa_dbg(wpa_s, MSG_DEBUG, "Selecting BSS from priority group %d",
group->priority);
for (i = 0; i < wpa_s->last_scan_res_used; i++) {
struct wpa_bss *bss = wpa_s->last_scan_res[i];
*selected_ssid = wpa_scan_res_match(wpa_s, i, bss, group);
if (!*selected_ssid)
continue;
wpa_dbg(wpa_s, MSG_DEBUG, " selected BSS " MACSTR
" ssid='%s'",
MAC2STR(bss->bssid),
wpa_ssid_txt(bss->ssid, bss->ssid_len));
return bss;
}
return NULL;
}
struct wpa_bss * wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
struct wpa_ssid **selected_ssid)
{
struct wpa_bss *selected = NULL;
int prio;
if (wpa_s->last_scan_res == NULL ||
wpa_s->last_scan_res_used == 0)
return NULL; /* no scan results from last update */
while (selected == NULL) {
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
selected = wpa_supplicant_select_bss(
wpa_s, wpa_s->conf->pssid[prio],
selected_ssid);
if (selected)
break;
}
if (selected == NULL && wpa_s->blacklist &&
!wpa_s->countermeasures) {
wpa_dbg(wpa_s, MSG_DEBUG, "No APs found - clear "
"blacklist and try again");
wpa_blacklist_clear(wpa_s);
wpa_s->blacklist_cleared++;
} else if (selected == NULL)
break;
}
return selected;
}
static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
int timeout_sec, int timeout_usec)
{
if (!wpa_supplicant_enabled_networks(wpa_s)) {
/*
* No networks are enabled; short-circuit request so
* we don't wait timeout seconds before transitioning
* to INACTIVE state.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "Short-circuit new scan request "
"since there are no enabled networks");
wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
#ifdef CONFIG_P2P
wpa_s->sta_scan_pending = 0;
#endif /* CONFIG_P2P */
return;
}
wpa_s->scan_for_connection = 1;
wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec);
}
int wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
struct wpa_bss *selected,
struct wpa_ssid *ssid)
{
if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
"PBC session overlap");
#ifdef CONFIG_P2P
if (wpas_p2p_notif_pbc_overlap(wpa_s) == 1)
return -1;
#endif /* CONFIG_P2P */
#ifdef CONFIG_WPS
wpas_wps_cancel(wpa_s);
#endif /* CONFIG_WPS */
return -1;
}
/*
* Do not trigger new association unless the BSSID has changed or if
* reassociation is requested. If we are in process of associating with
* the selected BSSID, do not trigger new attempt.
*/
if (wpa_s->reassociate ||
(os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
((wpa_s->wpa_state != WPA_ASSOCIATING &&
wpa_s->wpa_state != WPA_AUTHENTICATING) ||
os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
0))) {
if (wpa_supplicant_scard_init(wpa_s, ssid)) {
wpa_supplicant_req_new_scan(wpa_s, 10, 0);
return 0;
}
wpa_msg(wpa_s, MSG_DEBUG, "Request association: "
"reassociate: %d selected: "MACSTR " bssid: " MACSTR
" pending: " MACSTR " wpa_state: %s",
wpa_s->reassociate, MAC2STR(selected->bssid),
MAC2STR(wpa_s->bssid), MAC2STR(wpa_s->pending_bssid),
wpa_supplicant_state_txt(wpa_s->wpa_state));
wpa_supplicant_associate(wpa_s, selected, ssid);
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with the "
"selected AP");
}
return 0;
}
static struct wpa_ssid *
wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
{
int prio;
struct wpa_ssid *ssid;
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
{
if (wpas_network_disabled(wpa_s, ssid))
continue;
if (ssid->mode == IEEE80211_MODE_IBSS ||
ssid->mode == IEEE80211_MODE_AP)
return ssid;
}
}
return NULL;
}
/* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
* on BSS added and BSS changed events */
static void wpa_supplicant_rsn_preauth_scan_results(
struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
return;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
const u8 *ssid, *rsn;
ssid = wpa_bss_get_ie(bss, WLAN_EID_SSID);
if (ssid == NULL)
continue;
rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
if (rsn == NULL)
continue;
rsn_preauth_scan_result(wpa_s->wpa, bss->bssid, ssid, rsn);
}
}
static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s,
struct wpa_bss *selected,
struct wpa_ssid *ssid)
{
struct wpa_bss *current_bss = NULL;
int min_diff;
if (wpa_s->reassociate)
return 1; /* explicit request to reassociate */
if (wpa_s->wpa_state < WPA_ASSOCIATED)
return 1; /* we are not associated; continue */
if (wpa_s->current_ssid == NULL)
return 1; /* unknown current SSID */
if (wpa_s->current_ssid != ssid)
return 1; /* different network block */
if (wpas_driver_bss_selection(wpa_s))
return 0; /* Driver-based roaming */
if (wpa_s->current_ssid->ssid)
current_bss = wpa_bss_get(wpa_s, wpa_s->bssid,
wpa_s->current_ssid->ssid,
wpa_s->current_ssid->ssid_len);
if (!current_bss)
current_bss = wpa_bss_get_bssid(wpa_s, wpa_s->bssid);
if (!current_bss)
return 1; /* current BSS not seen in scan results */
if (current_bss == selected)
return 0;
if (selected->last_update_idx > current_bss->last_update_idx)
return 1; /* current BSS not seen in the last scan */
#ifndef CONFIG_NO_ROAMING
wpa_dbg(wpa_s, MSG_DEBUG, "Considering within-ESS reassociation");
wpa_dbg(wpa_s, MSG_DEBUG, "Current BSS: " MACSTR " level=%d",
MAC2STR(current_bss->bssid), current_bss->level);
wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR " level=%d",
MAC2STR(selected->bssid), selected->level);
if (wpa_s->current_ssid->bssid_set &&
os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) ==
0) {
wpa_dbg(wpa_s, MSG_DEBUG, "Allow reassociation - selected BSS "
"has preferred BSSID");
return 1;
}
if (current_bss->level < 0 && current_bss->level > selected->level) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - Current BSS has better "
"signal level");
return 0;
}
min_diff = 2;
if (current_bss->level < 0) {
if (current_bss->level < -85)
min_diff = 1;
else if (current_bss->level < -80)
min_diff = 2;
else if (current_bss->level < -75)
min_diff = 3;
else if (current_bss->level < -70)
min_diff = 4;
else
min_diff = 5;
}
if (abs(current_bss->level - selected->level) < min_diff) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - too small difference "
"in signal level");
return 0;
}
return 1;
#else /* CONFIG_NO_ROAMING */
return 0;
#endif /* CONFIG_NO_ROAMING */
}
/* Return != 0 if no scan results could be fetched or if scan results should not
* be shared with other virtual interfaces. */
static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
union wpa_event_data *data,
int own_request)
{
struct wpa_scan_results *scan_res;
int ap = 0;
#ifndef CONFIG_NO_RANDOM_POOL
size_t i, num;
#endif /* CONFIG_NO_RANDOM_POOL */
#ifdef CONFIG_AP
if (wpa_s->ap_iface)
ap = 1;
#endif /* CONFIG_AP */
wpa_supplicant_notify_scanning(wpa_s, 0);
#ifdef CONFIG_P2P
if (own_request && wpa_s->global->p2p_cb_on_scan_complete &&
!wpa_s->global->p2p_disabled &&
wpa_s->global->p2p != NULL && !wpa_s->sta_scan_pending &&
!wpa_s->scan_res_handler) {
wpa_s->global->p2p_cb_on_scan_complete = 0;
if (p2p_other_scan_completed(wpa_s->global->p2p) == 1) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Pending P2P operation "
"stopped scan processing");
wpa_s->sta_scan_pending = 1;
wpa_supplicant_req_scan(wpa_s, 5, 0);
return -1;
}
}
wpa_s->sta_scan_pending = 0;
#endif /* CONFIG_P2P */
scan_res = wpa_supplicant_get_scan_results(wpa_s,
data ? &data->scan_info :
NULL, 1);
if (scan_res == NULL) {
if (wpa_s->conf->ap_scan == 2 || ap ||
wpa_s->scan_res_handler == scan_only_handler)
return -1;
if (!own_request)
return -1;
wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results - try "
"scanning again");
wpa_supplicant_req_new_scan(wpa_s, 1, 0);
return -1;
}
#ifndef CONFIG_NO_RANDOM_POOL
num = scan_res->num;
if (num > 10)
num = 10;
for (i = 0; i < num; i++) {
u8 buf[5];
struct wpa_scan_res *res = scan_res->res[i];
buf[0] = res->bssid[5];
buf[1] = res->qual & 0xff;
buf[2] = res->noise & 0xff;
buf[3] = res->level & 0xff;
buf[4] = res->tsf & 0xff;
random_add_randomness(buf, sizeof(buf));
}
#endif /* CONFIG_NO_RANDOM_POOL */
if (own_request && wpa_s->scan_res_handler) {
void (*scan_res_handler)(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res);
scan_res_handler = wpa_s->scan_res_handler;
wpa_s->scan_res_handler = NULL;
scan_res_handler(wpa_s, scan_res);
wpa_scan_results_free(scan_res);
return -2;
}
if (ap) {
wpa_dbg(wpa_s, MSG_DEBUG, "Ignore scan results in AP mode");
#ifdef CONFIG_AP
if (wpa_s->ap_iface->scan_cb)
wpa_s->ap_iface->scan_cb(wpa_s->ap_iface);
#endif /* CONFIG_AP */
wpa_scan_results_free(scan_res);
return 0;
}
wpa_dbg(wpa_s, MSG_DEBUG, "New scan results available");
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
wpas_notify_scan_results(wpa_s);
wpas_notify_scan_done(wpa_s, 1);
if (sme_proc_obss_scan(wpa_s) > 0) {
wpa_scan_results_free(scan_res);
return 0;
}
if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
wpa_scan_results_free(scan_res);
return 0;
}
if (autoscan_notify_scan(wpa_s, scan_res)) {
wpa_scan_results_free(scan_res);
return 0;
}
if (wpa_s->disconnected) {
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
wpa_scan_results_free(scan_res);
return 0;
}
if (!wpas_driver_bss_selection(wpa_s) &&
bgscan_notify_scan(wpa_s, scan_res) == 1) {
wpa_scan_results_free(scan_res);
return 0;
}
wpas_wps_update_ap_info(wpa_s, scan_res);
wpa_scan_results_free(scan_res);
return wpas_select_network_from_last_scan(wpa_s);
}
static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *selected;
struct wpa_ssid *ssid = NULL;
selected = wpa_supplicant_pick_network(wpa_s, &ssid);
if (selected) {
int skip;
skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid);
if (skip) {
wpa_supplicant_rsn_preauth_scan_results(wpa_s);
return 0;
}
if (wpa_supplicant_connect(wpa_s, selected, ssid) < 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "Connect failed");
return -1;
}
wpa_supplicant_rsn_preauth_scan_results(wpa_s);
/*
* Do not notify other virtual radios of scan results since we do not
* want them to start other associations at the same time.
*/
return 1;
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "No suitable network found");
ssid = wpa_supplicant_pick_new_network(wpa_s);
if (ssid) {
wpa_dbg(wpa_s, MSG_DEBUG, "Setup a new network");
wpa_supplicant_associate(wpa_s, NULL, ssid);
wpa_supplicant_rsn_preauth_scan_results(wpa_s);
} else {
int timeout_sec = wpa_s->scan_interval;
int timeout_usec = 0;
#ifdef CONFIG_P2P
if (wpas_p2p_scan_no_go_seen(wpa_s) == 1)
return 0;
if (wpa_s->p2p_in_provisioning) {
/*
* Use shorter wait during P2P Provisioning
* state to speed up group formation.
*/
timeout_sec = 0;
timeout_usec = 250000;
wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
timeout_usec);
return 0;
}
#endif /* CONFIG_P2P */
#ifdef CONFIG_INTERWORKING
if (wpa_s->conf->auto_interworking &&
wpa_s->conf->interworking &&
wpa_s->conf->cred) {
wpa_dbg(wpa_s, MSG_DEBUG, "Interworking: "
"start ANQP fetch since no matching "
"networks found");
wpa_s->network_select = 1;
wpa_s->auto_network_select = 1;
interworking_start_fetch_anqp(wpa_s);
return 1;
}
#endif /* CONFIG_INTERWORKING */
if (wpa_supplicant_req_sched_scan(wpa_s))
wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
timeout_usec);
}
}
return 0;
}
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
const char *rn, *rn2;
struct wpa_supplicant *ifs;
if (_wpa_supplicant_event_scan_results(wpa_s, data, 1) != 0) {
/*
* If no scan results could be fetched, then no need to
* notify those interfaces that did not actually request
* this scan. Similarly, if scan results started a new operation on this
* interface, do not notify other interfaces to avoid concurrent
* operations during a connection attempt.
*/
return;
}
/*
* Check other interfaces to see if they have the same radio-name. If
* so, they get updated with this same scan info.
*/
if (!wpa_s->driver->get_radio_name)
return;
rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv);
if (rn == NULL || rn[0] == '\0')
return;
wpa_dbg(wpa_s, MSG_DEBUG, "Checking for other virtual interfaces "
"sharing same radio (%s) in event_scan_results", rn);
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
if (ifs == wpa_s || !ifs->driver->get_radio_name)
continue;
rn2 = ifs->driver->get_radio_name(ifs->drv_priv);
if (rn2 && os_strcmp(rn, rn2) == 0) {
wpa_printf(MSG_DEBUG, "%s: Updating scan results from "
"sibling", ifs->ifname);
_wpa_supplicant_event_scan_results(ifs, data, 0);
}
}
}
#endif /* CONFIG_NO_SCAN_PROCESSING */
int wpa_supplicant_fast_associate(struct wpa_supplicant *wpa_s)
{
#ifdef CONFIG_NO_SCAN_PROCESSING
return -1;
#else /* CONFIG_NO_SCAN_PROCESSING */
struct os_time now;
if (wpa_s->last_scan_res_used <= 0)
return -1;
os_get_time(&now);
if (now.sec - wpa_s->last_scan.sec > 5) {
wpa_printf(MSG_DEBUG, "Fast associate: Old scan results");
return -1;
}
return wpas_select_network_from_last_scan(wpa_s);
#endif /* CONFIG_NO_SCAN_PROCESSING */
}
#ifdef CONFIG_WNM
static void wnm_bss_keep_alive(void *eloop_ctx, void *sock_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->wpa_state < WPA_ASSOCIATED)
return;
if (!wpa_s->no_keep_alive) {
wpa_printf(MSG_DEBUG, "WNM: Send keep-alive to AP " MACSTR,
MAC2STR(wpa_s->bssid));
/* TODO: could skip this if normal data traffic has been sent */
/* TODO: Consider using some more appropriate data frame for
* this */
if (wpa_s->l2)
l2_packet_send(wpa_s->l2, wpa_s->bssid, 0x0800,
(u8 *) "", 0);
}
#ifdef CONFIG_SME
if (wpa_s->sme.bss_max_idle_period) {
unsigned int msec;
msec = wpa_s->sme.bss_max_idle_period * 1024; /* times 1000 */
if (msec > 100)
msec -= 100;
eloop_register_timeout(msec / 1000, msec % 1000 * 1000,
wnm_bss_keep_alive, wpa_s, NULL);
}
#endif /* CONFIG_SME */
}
static void wnm_process_assoc_resp(struct wpa_supplicant *wpa_s,
const u8 *ies, size_t ies_len)
{
struct ieee802_11_elems elems;
if (ies == NULL)
return;
if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed)
return;
#ifdef CONFIG_SME
if (elems.bss_max_idle_period) {
unsigned int msec;
wpa_s->sme.bss_max_idle_period =
WPA_GET_LE16(elems.bss_max_idle_period);
wpa_printf(MSG_DEBUG, "WNM: BSS Max Idle Period: %u (* 1000 "
"TU)%s", wpa_s->sme.bss_max_idle_period,
(elems.bss_max_idle_period[2] & 0x01) ?
" (protected keep-live required)" : "");
if (wpa_s->sme.bss_max_idle_period == 0)
wpa_s->sme.bss_max_idle_period = 1;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) {
eloop_cancel_timeout(wnm_bss_keep_alive, wpa_s, NULL);
/* msec times 1000 */
msec = wpa_s->sme.bss_max_idle_period * 1024;
if (msec > 100)
msec -= 100;
eloop_register_timeout(msec / 1000, msec % 1000 * 1000,
wnm_bss_keep_alive, wpa_s,
NULL);
}
}
#endif /* CONFIG_SME */
}
#endif /* CONFIG_WNM */
void wnm_bss_keep_alive_deinit(struct wpa_supplicant *wpa_s)
{
#ifdef CONFIG_WNM
eloop_cancel_timeout(wnm_bss_keep_alive, wpa_s, NULL);
#endif /* CONFIG_WNM */
}
static int wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
int l, len, found = 0, wpa_found, rsn_found;
const u8 *p;
#ifdef CONFIG_IEEE80211R
u8 bssid[ETH_ALEN];
#endif /* CONFIG_IEEE80211R */
wpa_dbg(wpa_s, MSG_DEBUG, "Association info event");
if (data->assoc_info.req_ies)
wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
data->assoc_info.req_ies_len);
if (data->assoc_info.resp_ies) {
wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len);
#ifdef CONFIG_TDLS
wpa_tdls_assoc_resp_ies(wpa_s->wpa, data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len);
#endif /* CONFIG_TDLS */
#ifdef CONFIG_WNM
wnm_process_assoc_resp(wpa_s, data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len);
#endif /* CONFIG_WNM */
}
if (data->assoc_info.beacon_ies)
wpa_hexdump(MSG_DEBUG, "beacon_ies",
data->assoc_info.beacon_ies,
data->assoc_info.beacon_ies_len);
if (data->assoc_info.freq)
wpa_dbg(wpa_s, MSG_DEBUG, "freq=%u MHz",
data->assoc_info.freq);
p = data->assoc_info.req_ies;
l = data->assoc_info.req_ies_len;
/* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
while (p && l >= 2) {
len = p[1] + 2;
if (len > l) {
wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
p, l);
break;
}
if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
(os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
(p[0] == WLAN_EID_RSN && p[1] >= 2)) {
if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
break;
found = 1;
wpa_find_assoc_pmkid(wpa_s);
break;
}
l -= len;
p += len;
}
if (!found && data->assoc_info.req_ies)
wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
#ifdef CONFIG_IEEE80211R
#ifdef CONFIG_SME
if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FT) {
if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
wpa_ft_validate_reassoc_resp(wpa_s->wpa,
data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len,
bssid) < 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of "
"Reassociation Response failed");
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_INVALID_IE);
return -1;
}
}
p = data->assoc_info.resp_ies;
l = data->assoc_info.resp_ies_len;
#ifdef CONFIG_WPS_STRICT
if (p && wpa_s->current_ssid &&
wpa_s->current_ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
struct wpabuf *wps;
wps = ieee802_11_vendor_ie_concat(p, l, WPS_IE_VENDOR_TYPE);
if (wps == NULL) {
wpa_msg(wpa_s, MSG_INFO, "WPS-STRICT: AP did not "
"include WPS IE in (Re)Association Response");
return -1;
}
if (wps_validate_assoc_resp(wps) < 0) {
wpabuf_free(wps);
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_INVALID_IE);
return -1;
}
wpabuf_free(wps);
}
#endif /* CONFIG_WPS_STRICT */
/* Go through the IEs and make a copy of the MDIE, if present. */
while (p && l >= 2) {
len = p[1] + 2;
if (len > l) {
wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
p, l);
break;
}
if (p[0] == WLAN_EID_MOBILITY_DOMAIN &&
p[1] >= MOBILITY_DOMAIN_ID_LEN) {
wpa_s->sme.ft_used = 1;
os_memcpy(wpa_s->sme.mobility_domain, p + 2,
MOBILITY_DOMAIN_ID_LEN);
break;
}
l -= len;
p += len;
}
#endif /* CONFIG_SME */
/* Process FT when SME is in the driver */
if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
wpa_ft_is_completed(wpa_s->wpa)) {
if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
wpa_ft_validate_reassoc_resp(wpa_s->wpa,
data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len,
bssid) < 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of "
"Reassociation Response failed");
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_INVALID_IE);
return -1;
}
wpa_dbg(wpa_s, MSG_DEBUG, "FT: Reassociation Response done");
}
wpa_sm_set_ft_params(wpa_s->wpa, data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len);
#endif /* CONFIG_IEEE80211R */
/* WPA/RSN IE from Beacon/ProbeResp */
p = data->assoc_info.beacon_ies;
l = data->assoc_info.beacon_ies_len;
/* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
*/
wpa_found = rsn_found = 0;
while (p && l >= 2) {
len = p[1] + 2;
if (len > l) {
wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
p, l);
break;
}
if (!wpa_found &&
p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
wpa_found = 1;
wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
}
if (!rsn_found &&
p[0] == WLAN_EID_RSN && p[1] >= 2) {
rsn_found = 1;
wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
}
l -= len;
p += len;
}
if (!wpa_found && data->assoc_info.beacon_ies)
wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
if (!rsn_found && data->assoc_info.beacon_ies)
wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
if (wpa_found || rsn_found)
wpa_s->ap_ies_from_associnfo = 1;
if (wpa_s->assoc_freq && data->assoc_info.freq &&
wpa_s->assoc_freq != data->assoc_info.freq) {
wpa_printf(MSG_DEBUG, "Operating frequency changed from "
"%u to %u MHz",
wpa_s->assoc_freq, data->assoc_info.freq);
wpa_supplicant_update_scan_results(wpa_s);
}
wpa_s->assoc_freq = data->assoc_info.freq;
return 0;
}
static struct wpa_bss * wpa_supplicant_get_new_bss(
struct wpa_supplicant *wpa_s, const u8 *bssid)
{
struct wpa_bss *bss = NULL;
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (ssid->ssid_len > 0)
bss = wpa_bss_get(wpa_s, bssid, ssid->ssid, ssid->ssid_len);
if (!bss)
bss = wpa_bss_get_bssid(wpa_s, bssid);
return bss;
}
static int wpa_supplicant_assoc_update_ie(struct wpa_supplicant *wpa_s)
{
const u8 *bss_wpa = NULL, *bss_rsn = NULL;
if (!wpa_s->current_bss || !wpa_s->current_ssid)
return -1;
if (!wpa_key_mgmt_wpa_any(wpa_s->current_ssid->key_mgmt))
return 0;
bss_wpa = wpa_bss_get_vendor_ie(wpa_s->current_bss,
WPA_IE_VENDOR_TYPE);
bss_rsn = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_RSN);
if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
bss_wpa ? 2 + bss_wpa[1] : 0) ||
wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
bss_rsn ? 2 + bss_rsn[1] : 0))
return -1;
return 0;
}
static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
u8 bssid[ETH_ALEN];
int ft_completed;
struct wpa_driver_capa capa;
#ifdef CONFIG_AP
if (wpa_s->ap_iface) {
hostapd_notif_assoc(wpa_s->ap_iface->bss[0],
data->assoc_info.addr,
data->assoc_info.req_ies,
data->assoc_info.req_ies_len,
data->assoc_info.reassoc);
return;
}
#endif /* CONFIG_AP */
ft_completed = wpa_ft_is_completed(wpa_s->wpa);
if (data && wpa_supplicant_event_associnfo(wpa_s, data) < 0)
return;
if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
wpa_dbg(wpa_s, MSG_ERROR, "Failed to get BSSID");
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_DEAUTH_LEAVING);
return;
}
wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
if (os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
MACSTR, MAC2STR(bssid));
random_add_randomness(bssid, ETH_ALEN);
os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
wpas_notify_bssid_changed(wpa_s);
if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
wpa_clear_keys(wpa_s, bssid);
}
if (wpa_supplicant_select_config(wpa_s) < 0) {
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_DEAUTH_LEAVING);
return;
}
if (wpa_s->current_ssid) {
struct wpa_bss *bss = NULL;
bss = wpa_supplicant_get_new_bss(wpa_s, bssid);
if (!bss) {
wpa_supplicant_update_scan_results(wpa_s);
/* Get the BSS from the new scan results */
bss = wpa_supplicant_get_new_bss(wpa_s, bssid);
}
if (bss)
wpa_s->current_bss = bss;
}
#ifdef ANDROID
if (wpa_s->conf->ap_scan == 1) {
#else
if (wpa_s->conf->ap_scan == 1 &&
wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION) {
#endif
if (wpa_supplicant_assoc_update_ie(wpa_s) < 0)
wpa_msg(wpa_s, MSG_WARNING,
"WPA/RSN IEs not updated");
}
}
#ifdef CONFIG_SME
os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
wpa_s->sme.prev_bssid_set = 1;
#endif /* CONFIG_SME */
wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
if (wpa_s->current_ssid) {
/* When using scanning (ap_scan=1), SIM PC/SC interface can be
* initialized before association, but for other modes,
* initialize PC/SC here, if the current configuration needs
* smartcard or SIM/USIM. */
wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
}
wpa_sm_notify_assoc(wpa_s->wpa, bssid);
if (wpa_s->l2)
l2_packet_notify_auth_start(wpa_s->l2);
/*
* Set portEnabled first to FALSE in order to get EAP state machine out
* of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
* state machine may transit to AUTHENTICATING state based on obsolete
* eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
* AUTHENTICATED without ever giving chance to EAP state machine to
* reset the state.
*/
if (!ft_completed) {
eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
}
if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
/* 802.1X::portControl = Auto */
eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
wpa_s->eapol_received = 0;
if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
(wpa_s->current_ssid &&
wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
wpa_supplicant_cancel_auth_timeout(wpa_s);
wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
} else if (!ft_completed) {
/* Timeout for receiving the first EAPOL packet */
wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
}
wpa_supplicant_cancel_scan(wpa_s);
if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
/*
* We are done; the driver will take care of RSN 4-way
* handshake.
*/
wpa_supplicant_cancel_auth_timeout(wpa_s);
wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
} else if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
/*
* The driver will take care of RSN 4-way handshake, so we need
* to allow EAPOL supplicant to complete its work without
* waiting for WPA supplicant.
*/
eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
} else if (ft_completed) {
/*
* FT protocol completed - make sure EAPOL state machine ends
* up in authenticated.
*/
wpa_supplicant_cancel_auth_timeout(wpa_s);
wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
}
wpa_s->last_eapol_matches_bssid = 0;
if (wpa_s->pending_eapol_rx) {
struct os_time now, age;
os_get_time(&now);
os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
if (age.sec == 0 && age.usec < 100000 &&
os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
0) {
wpa_dbg(wpa_s, MSG_DEBUG, "Process pending EAPOL "
"frame that was received just before "
"association notification");
wpa_supplicant_rx_eapol(
wpa_s, wpa_s->pending_eapol_rx_src,
wpabuf_head(wpa_s->pending_eapol_rx),
wpabuf_len(wpa_s->pending_eapol_rx));
}
wpabuf_free(wpa_s->pending_eapol_rx);
wpa_s->pending_eapol_rx = NULL;
}
if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
/* Set static WEP keys again */
wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
}
#ifdef CONFIG_IBSS_RSN
if (wpa_s->current_ssid &&
wpa_s->current_ssid->mode == WPAS_MODE_IBSS &&
wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE &&
wpa_s->ibss_rsn == NULL) {
wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
if (!wpa_s->ibss_rsn) {
wpa_msg(wpa_s, MSG_INFO, "Failed to init IBSS RSN");
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_DEAUTH_LEAVING);
return;
}
ibss_rsn_set_psk(wpa_s->ibss_rsn, wpa_s->current_ssid->psk);
}
#endif /* CONFIG_IBSS_RSN */
wpas_wps_notify_assoc(wpa_s, bssid);
}
static int disconnect_reason_recoverable(u16 reason_code)
{
return reason_code == WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY ||
reason_code == WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA ||
reason_code == WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA;
}
static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
u16 reason_code,
int locally_generated)
{
const u8 *bssid;
if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
/*
* At least Host AP driver and a Prism3 card seemed to be
* generating streams of disconnected events when configuring
* IBSS for WPA-None. Ignore them for now.
*/
return;
}
bssid = wpa_s->bssid;
if (is_zero_ether_addr(bssid))
bssid = wpa_s->pending_bssid;
if (!is_zero_ether_addr(bssid) ||
wpa_s->wpa_state >= WPA_AUTHENTICATING) {
wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
" reason=%d%s",
MAC2STR(bssid), reason_code,
locally_generated ? " locally_generated=1" : "");
}
}
static int could_be_psk_mismatch(struct wpa_supplicant *wpa_s, u16 reason_code,
int locally_generated)
{
if (wpa_s->wpa_state != WPA_4WAY_HANDSHAKE ||
!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
return 0; /* Not in 4-way handshake with PSK */
/*
* It looks like connection was lost while trying to go through PSK
* 4-way handshake. Filter out known disconnection cases that are caused
* by something else than PSK mismatch to avoid confusing reports.
*/
if (locally_generated) {
if (reason_code == WLAN_REASON_IE_IN_4WAY_DIFFERS)
return 0;
}
return 1;
}
static void wpa_supplicant_event_disassoc_finish(struct wpa_supplicant *wpa_s,
u16 reason_code,
int locally_generated)
{
const u8 *bssid;
int authenticating;
u8 prev_pending_bssid[ETH_ALEN];
struct wpa_bss *fast_reconnect = NULL;
struct wpa_ssid *fast_reconnect_ssid = NULL;
struct wpa_ssid *last_ssid;
authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
/*
* At least Host AP driver and a Prism3 card seemed to be
* generating streams of disconnected events when configuring
* IBSS for WPA-None. Ignore them for now.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - ignore in "
"IBSS/WPA-None mode");
return;
}
if (could_be_psk_mismatch(wpa_s, reason_code, locally_generated)) {
wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
"pre-shared key may be incorrect");
wpas_auth_failed(wpa_s);
}
if (!wpa_s->disconnected &&
(!wpa_s->auto_reconnect_disabled ||
wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect enabled: try to "
"reconnect (wps=%d wpa_state=%d)",
wpa_s->key_mgmt == WPA_KEY_MGMT_WPS,
wpa_s->wpa_state);
if (wpa_s->wpa_state == WPA_COMPLETED &&
wpa_s->current_ssid &&
wpa_s->current_ssid->mode == WPAS_MODE_INFRA &&
!locally_generated &&
disconnect_reason_recoverable(reason_code)) {
/*
* It looks like the AP has dropped association with
* us, but could allow us to get back in. Try to
* reconnect to the same BSS without full scan to save
* time for some common cases.
*/
fast_reconnect = wpa_s->current_bss;
fast_reconnect_ssid = wpa_s->current_ssid;
} else if (wpa_s->wpa_state >= WPA_ASSOCIATING)
#ifdef ANDROID
wpa_supplicant_req_scan(wpa_s, 0, 500000);
#else
wpa_supplicant_req_scan(wpa_s, 0, 100000);
#endif
else
wpa_dbg(wpa_s, MSG_DEBUG, "Do not request new "
"immediate scan");
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect disabled: do not "
"try to re-connect");
wpa_s->reassociate = 0;
wpa_s->disconnected = 1;
wpa_supplicant_cancel_sched_scan(wpa_s);
}
bssid = wpa_s->bssid;
if (is_zero_ether_addr(bssid))
bssid = wpa_s->pending_bssid;
if (wpa_s->wpa_state >= WPA_AUTHENTICATING)
wpas_connection_failed(wpa_s, bssid);
wpa_sm_notify_disassoc(wpa_s->wpa);
if (locally_generated)
wpa_s->disconnect_reason = -reason_code;
else
wpa_s->disconnect_reason = reason_code;
wpas_notify_disconnect_reason(wpa_s);
if (wpa_supplicant_dynamic_keys(wpa_s)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - remove keys");
wpa_s->keys_cleared = 0;
wpa_clear_keys(wpa_s, wpa_s->bssid);
}
last_ssid = wpa_s->current_ssid;
wpa_supplicant_mark_disassoc(wpa_s);
if (authenticating && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
sme_disassoc_while_authenticating(wpa_s, prev_pending_bssid);
wpa_s->current_ssid = last_ssid;
}
if (fast_reconnect) {
#ifndef CONFIG_NO_SCAN_PROCESSING
wpa_dbg(wpa_s, MSG_DEBUG, "Try to reconnect to the same BSS");
if (wpa_supplicant_connect(wpa_s, fast_reconnect,
fast_reconnect_ssid) < 0) {
/* Recover through full scan */
wpa_supplicant_req_scan(wpa_s, 0, 100000);
}
#endif /* CONFIG_NO_SCAN_PROCESSING */
}
}
#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx, void *sock_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (!wpa_s->pending_mic_error_report)
return;
wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Sending pending MIC error report");
wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
wpa_s->pending_mic_error_report = 0;
}
#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
static void
wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
int pairwise;
struct os_time t;
wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
pairwise = (data && data->michael_mic_failure.unicast);
os_get_time(&t);
if ((wpa_s->last_michael_mic_error &&
t.sec - wpa_s->last_michael_mic_error <= 60) ||
wpa_s->pending_mic_error_report) {
if (wpa_s->pending_mic_error_report) {
/*
* Send the pending MIC error report immediately since
* we are going to start countermeasures and AP better
* do the same.
*/
wpa_sm_key_request(wpa_s->wpa, 1,
wpa_s->pending_mic_error_pairwise);
}
/* Send the new MIC error report immediately since we are going
* to start countermeasures and AP better do the same.
*/
wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
/* initialize countermeasures */
wpa_s->countermeasures = 1;
wpa_blacklist_add(wpa_s, wpa_s->bssid);
wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
/*
* Need to wait for completion of request frame. We do not get
* any callback for the message completion, so just wait a
* short while and hope for the best. */
os_sleep(0, 10000);
wpa_drv_set_countermeasures(wpa_s, 1);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_MICHAEL_MIC_FAILURE);
eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
wpa_s, NULL);
eloop_register_timeout(60, 0,
wpa_supplicant_stop_countermeasures,
wpa_s, NULL);
/* TODO: mark the AP rejected for 60 second. STA is
* allowed to associate with another AP.. */
} else {
#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
if (wpa_s->mic_errors_seen) {
/*
* Reduce the effectiveness of Michael MIC error
* reports as a means for attacking against TKIP if
* more than one MIC failure is noticed with the same
* PTK. We delay the transmission of the reports by a
* random time between 0 and 60 seconds in order to
* force the attacker wait 60 seconds before getting
* the information on whether a frame resulted in a MIC
* failure.
*/
u8 rval[4];
int sec;
if (os_get_random(rval, sizeof(rval)) < 0)
sec = os_random() % 60;
else
sec = WPA_GET_BE32(rval) % 60;
wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Delay MIC error "
"report %d seconds", sec);
wpa_s->pending_mic_error_report = 1;
wpa_s->pending_mic_error_pairwise = pairwise;
eloop_cancel_timeout(
wpa_supplicant_delayed_mic_error_report,
wpa_s, NULL);
eloop_register_timeout(
sec, os_random() % 1000000,
wpa_supplicant_delayed_mic_error_report,
wpa_s, NULL);
} else {
wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
}
#else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
}
wpa_s->last_michael_mic_error = t.sec;
wpa_s->mic_errors_seen++;
}
#ifdef CONFIG_TERMINATE_ONLASTIF
static int any_interfaces(struct wpa_supplicant *head)
{
struct wpa_supplicant *wpa_s;
for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
if (!wpa_s->interface_removed)
return 1;
return 0;
}
#endif /* CONFIG_TERMINATE_ONLASTIF */
static void
wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
return;
switch (data->interface_status.ievent) {
case EVENT_INTERFACE_ADDED:
if (!wpa_s->interface_removed)
break;
wpa_s->interface_removed = 0;
wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was added");
if (wpa_supplicant_driver_init(wpa_s) < 0) {
wpa_msg(wpa_s, MSG_INFO, "Failed to initialize the "
"driver after interface was added");
}
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
break;
case EVENT_INTERFACE_REMOVED:
wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was removed");
wpa_s->interface_removed = 1;
wpa_supplicant_mark_disassoc(wpa_s);
wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED);
l2_packet_deinit(wpa_s->l2);
wpa_s->l2 = NULL;
#ifdef CONFIG_IBSS_RSN
ibss_rsn_deinit(wpa_s->ibss_rsn);
wpa_s->ibss_rsn = NULL;
#endif /* CONFIG_IBSS_RSN */
#ifdef CONFIG_TERMINATE_ONLASTIF
/* check if last interface */
if (!any_interfaces(wpa_s->global->ifaces))
eloop_terminate();
#endif /* CONFIG_TERMINATE_ONLASTIF */
break;
}
}
#ifdef CONFIG_PEERKEY
static void
wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
if (data == NULL)
return;
wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
}
#endif /* CONFIG_PEERKEY */
#ifdef CONFIG_TDLS
static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
if (data == NULL)
return;
switch (data->tdls.oper) {
case TDLS_REQUEST_SETUP:
wpa_tdls_remove(wpa_s->wpa, data->tdls.peer);
if (wpa_tdls_is_external_setup(wpa_s->wpa))
wpa_tdls_start(wpa_s->wpa, data->tdls.peer);
else
wpa_drv_tdls_oper(wpa_s, TDLS_SETUP, data->tdls.peer);
break;
case TDLS_REQUEST_TEARDOWN:
wpa_tdls_teardown_link(wpa_s->wpa, data->tdls.peer,
data->tdls.reason_code);
break;
}
}
#endif /* CONFIG_TDLS */
#ifdef CONFIG_WNM
static void wpa_supplicant_event_wnm(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
if (data == NULL)
return;
switch (data->wnm.oper) {
case WNM_OPER_SLEEP:
wpa_printf(MSG_DEBUG, "Start sending WNM-Sleep Request "
"(action=%d, intval=%d)",
data->wnm.sleep_action, data->wnm.sleep_intval);
ieee802_11_send_wnmsleep_req(wpa_s, data->wnm.sleep_action,
data->wnm.sleep_intval, NULL);
break;
}
}
#endif /* CONFIG_WNM */
#ifdef CONFIG_IEEE80211R
static void
wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
if (data == NULL)
return;
if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
data->ft_ies.ies_len,
data->ft_ies.ft_action,
data->ft_ies.target_ap,
data->ft_ies.ric_ies,
data->ft_ies.ric_ies_len) < 0) {
/* TODO: prevent MLME/driver from trying to associate? */
}
}
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IBSS_RSN
static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
struct wpa_ssid *ssid;
if (wpa_s->wpa_state < WPA_ASSOCIATED)
return;
if (data == NULL)
return;
ssid = wpa_s->current_ssid;
if (ssid == NULL)
return;
if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt))
return;
ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
}
#endif /* CONFIG_IBSS_RSN */
#ifdef CONFIG_IEEE80211R
static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data,
size_t len)
{
const u8 *sta_addr, *target_ap_addr;
u16 status;
wpa_hexdump(MSG_MSGDUMP, "FT: RX Action", data, len);
if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
return; /* only SME case supported for now */
if (len < 1 + 2 * ETH_ALEN + 2)
return;
if (data[0] != 2)
return; /* Only FT Action Response is supported for now */
sta_addr = data + 1;
target_ap_addr = data + 1 + ETH_ALEN;
status = WPA_GET_LE16(data + 1 + 2 * ETH_ALEN);
wpa_dbg(wpa_s, MSG_DEBUG, "FT: Received FT Action Response: STA "
MACSTR " TargetAP " MACSTR " status %u",
MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "FT: Foreign STA Address " MACSTR
" in FT Action Response", MAC2STR(sta_addr));
return;
}
if (status) {
wpa_dbg(wpa_s, MSG_DEBUG, "FT: FT Action Response indicates "
"failure (status code %d)", status);
/* TODO: report error to FT code(?) */
return;
}
if (wpa_ft_process_response(wpa_s->wpa, data + 1 + 2 * ETH_ALEN + 2,
len - (1 + 2 * ETH_ALEN + 2), 1,
target_ap_addr, NULL, 0) < 0)
return;
#ifdef CONFIG_SME
{
struct wpa_bss *bss;
bss = wpa_bss_get_bssid(wpa_s, target_ap_addr);
if (bss)
wpa_s->sme.freq = bss->freq;
wpa_s->sme.auth_alg = WPA_AUTH_ALG_FT;
sme_associate(wpa_s, WPAS_MODE_INFRA, target_ap_addr,
WLAN_AUTH_FT);
}
#endif /* CONFIG_SME */
}
#endif /* CONFIG_IEEE80211R */
static void wpa_supplicant_event_unprot_deauth(struct wpa_supplicant *wpa_s,
struct unprot_deauth *e)
{
#ifdef CONFIG_IEEE80211W
wpa_printf(MSG_DEBUG, "Unprotected Deauthentication frame "
"dropped: " MACSTR " -> " MACSTR
" (reason code %u)",
MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
#endif /* CONFIG_IEEE80211W */
}
static void wpa_supplicant_event_unprot_disassoc(struct wpa_supplicant *wpa_s,
struct unprot_disassoc *e)
{
#ifdef CONFIG_IEEE80211W
wpa_printf(MSG_DEBUG, "Unprotected Disassociation frame "
"dropped: " MACSTR " -> " MACSTR
" (reason code %u)",
MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
#endif /* CONFIG_IEEE80211W */
}
void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
union wpa_event_data *data)
{
struct wpa_supplicant *wpa_s = ctx;
u16 reason_code = 0;
int locally_generated = 0;
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED &&
event != EVENT_INTERFACE_ENABLED &&
event != EVENT_INTERFACE_STATUS &&
event != EVENT_SCHED_SCAN_STOPPED) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Ignore event %s (%d) while interface is disabled",
event_to_string(event), event);
return;
}
#ifndef CONFIG_NO_STDOUT_DEBUG
{
int level = MSG_DEBUG;
if (event == EVENT_RX_MGMT && data->rx_mgmt.frame_len >= 24) {
const struct ieee80211_hdr *hdr;
u16 fc;
hdr = (const struct ieee80211_hdr *) data->rx_mgmt.frame;
fc = le_to_host16(hdr->frame_control);
if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
level = MSG_EXCESSIVE;
}
wpa_dbg(wpa_s, level, "Event %s (%d) received",
event_to_string(event), event);
}
#endif /* CONFIG_NO_STDOUT_DEBUG */
switch (event) {
case EVENT_AUTH:
sme_event_auth(wpa_s, data);
break;
case EVENT_ASSOC:
wpa_supplicant_event_assoc(wpa_s, data);
break;
case EVENT_DISASSOC:
wpa_dbg(wpa_s, MSG_DEBUG, "Disassociation notification");
if (data) {
wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u%s",
data->disassoc_info.reason_code,
data->disassoc_info.locally_generated ?
" (locally generated)" : "");
if (data->disassoc_info.addr)
wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR,
MAC2STR(data->disassoc_info.addr));
}
#ifdef CONFIG_AP
if (wpa_s->ap_iface && data && data->disassoc_info.addr) {
hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
data->disassoc_info.addr);
break;
}
if (wpa_s->ap_iface) {
wpa_dbg(wpa_s, MSG_DEBUG, "Ignore disassoc event in "
"AP mode");
break;
}
#endif /* CONFIG_AP */
if (data) {
reason_code = data->disassoc_info.reason_code;
locally_generated =
data->disassoc_info.locally_generated;
wpa_hexdump(MSG_DEBUG, "Disassociation frame IE(s)",
data->disassoc_info.ie,
data->disassoc_info.ie_len);
#ifdef CONFIG_P2P
wpas_p2p_disassoc_notif(
wpa_s, data->disassoc_info.addr, reason_code,
data->disassoc_info.ie,
data->disassoc_info.ie_len,
locally_generated);
#endif /* CONFIG_P2P */
}
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
sme_event_disassoc(wpa_s, data);
/* fall through */
case EVENT_DEAUTH:
if (event == EVENT_DEAUTH) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Deauthentication notification");
if (data) {
reason_code = data->deauth_info.reason_code;
locally_generated =
data->deauth_info.locally_generated;
wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u%s",
data->deauth_info.reason_code,
data->deauth_info.locally_generated ?
" (locally generated)" : "");
if (data->deauth_info.addr) {
wpa_dbg(wpa_s, MSG_DEBUG, " * address "
MACSTR,
MAC2STR(data->deauth_info.
addr));
}
wpa_hexdump(MSG_DEBUG,
"Deauthentication frame IE(s)",
data->deauth_info.ie,
data->deauth_info.ie_len);
}
}
#ifdef CONFIG_AP
if (wpa_s->ap_iface && data && data->deauth_info.addr) {
hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
data->deauth_info.addr);
break;
}
if (wpa_s->ap_iface) {
wpa_dbg(wpa_s, MSG_DEBUG, "Ignore deauth event in "
"AP mode");
break;
}
#endif /* CONFIG_AP */
wpa_supplicant_event_disassoc(wpa_s, reason_code,
locally_generated);
if (reason_code == WLAN_REASON_IEEE_802_1X_AUTH_FAILED ||
((wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
(wpa_s->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) &&
eapol_sm_failed(wpa_s->eapol)))
wpas_auth_failed(wpa_s);
#ifdef CONFIG_P2P
if (event == EVENT_DEAUTH && data) {
if (wpas_p2p_deauth_notif(wpa_s,
data->deauth_info.addr,
reason_code,
data->deauth_info.ie,
data->deauth_info.ie_len,
locally_generated) > 0) {
/*
* The interface was removed, so cannot
* continue processing any additional
* operations after this.
*/
break;
}
}
#endif /* CONFIG_P2P */
wpa_supplicant_event_disassoc_finish(wpa_s, reason_code,
locally_generated);
break;
case EVENT_MICHAEL_MIC_FAILURE:
wpa_supplicant_event_michael_mic_failure(wpa_s, data);
break;
#ifndef CONFIG_NO_SCAN_PROCESSING
case EVENT_SCAN_RESULTS:
wpa_supplicant_event_scan_results(wpa_s, data);
if (wpa_s->wpa_state != WPA_AUTHENTICATING &&
wpa_s->wpa_state != WPA_ASSOCIATING)
wpas_p2p_continue_after_scan(wpa_s);
break;
#endif /* CONFIG_NO_SCAN_PROCESSING */
case EVENT_ASSOCINFO:
wpa_supplicant_event_associnfo(wpa_s, data);
break;
case EVENT_INTERFACE_STATUS:
wpa_supplicant_event_interface_status(wpa_s, data);
break;
case EVENT_PMKID_CANDIDATE:
wpa_supplicant_event_pmkid_candidate(wpa_s, data);
break;
#ifdef CONFIG_PEERKEY
case EVENT_STKSTART:
wpa_supplicant_event_stkstart(wpa_s, data);
break;
#endif /* CONFIG_PEERKEY */
#ifdef CONFIG_TDLS
case EVENT_TDLS:
wpa_supplicant_event_tdls(wpa_s, data);
break;
#endif /* CONFIG_TDLS */
#ifdef CONFIG_WNM
case EVENT_WNM:
wpa_supplicant_event_wnm(wpa_s, data);
break;
#endif /* CONFIG_WNM */
#ifdef CONFIG_IEEE80211R
case EVENT_FT_RESPONSE:
wpa_supplicant_event_ft_response(wpa_s, data);
break;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IBSS_RSN
case EVENT_IBSS_RSN_START:
wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
break;
#endif /* CONFIG_IBSS_RSN */
case EVENT_ASSOC_REJECT:
if (data->assoc_reject.bssid)
wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
"bssid=" MACSTR " status_code=%u",
MAC2STR(data->assoc_reject.bssid),
data->assoc_reject.status_code);
else
wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
"status_code=%u",
data->assoc_reject.status_code);
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
sme_event_assoc_reject(wpa_s, data);
else {
#ifdef ANDROID_P2P
if(!wpa_s->current_ssid) {
wpa_printf(MSG_ERROR, "current_ssid == NULL");
break;
}
/* If assoc reject is reported by the driver, then avoid
* waiting for the authentication timeout. Cancel the
* authentication timeout and retry the assoc.
*/
if(wpa_s->current_ssid->assoc_retry++ < 10) {
wpa_printf(MSG_ERROR, "Retrying assoc: %d ",
wpa_s->current_ssid->assoc_retry);
wpa_supplicant_cancel_auth_timeout(wpa_s);
/* Clear the states */
wpa_sm_notify_disassoc(wpa_s->wpa);
wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
wpa_s->reassociate = 1;
if (wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE) {
const u8 *bl_bssid = data->assoc_reject.bssid;
if (!bl_bssid || is_zero_ether_addr(bl_bssid))
bl_bssid = wpa_s->pending_bssid;
wpa_blacklist_add(wpa_s, bl_bssid);
wpa_supplicant_req_scan(wpa_s, 0, 0);
} else {
wpa_supplicant_req_scan(wpa_s, 1, 0);
}
} else if (wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE) {
/* If we ASSOC_REJECT's hits threshold, disable the
* network
*/
wpa_printf(MSG_ERROR, "Assoc retry threshold reached. "
"Disabling the network");
wpa_s->current_ssid->assoc_retry = 0;
wpa_supplicant_disable_network(wpa_s, wpa_s->current_ssid);
wpas_p2p_group_remove(wpa_s, wpa_s->ifname);
}
#else
const u8 *bssid = data->assoc_reject.bssid;
if (bssid == NULL || is_zero_ether_addr(bssid))
bssid = wpa_s->pending_bssid;
wpas_connection_failed(wpa_s, bssid);
wpa_supplicant_mark_disassoc(wpa_s);
#endif /* ANDROID_P2P */
}
break;
case EVENT_AUTH_TIMED_OUT:
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
sme_event_auth_timed_out(wpa_s, data);
break;
case EVENT_ASSOC_TIMED_OUT:
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
sme_event_assoc_timed_out(wpa_s, data);
break;
case EVENT_TX_STATUS:
wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS dst=" MACSTR
" type=%d stype=%d",
MAC2STR(data->tx_status.dst),
data->tx_status.type, data->tx_status.stype);
#ifdef CONFIG_AP
if (wpa_s->ap_iface == NULL) {
#ifdef CONFIG_OFFCHANNEL
if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
data->tx_status.stype == WLAN_FC_STYPE_ACTION)
offchannel_send_action_tx_status(
wpa_s, data->tx_status.dst,
data->tx_status.data,
data->tx_status.data_len,
data->tx_status.ack ?
OFFCHANNEL_SEND_ACTION_SUCCESS :
OFFCHANNEL_SEND_ACTION_NO_ACK);
#endif /* CONFIG_OFFCHANNEL */
break;
}
#endif /* CONFIG_AP */
#ifdef CONFIG_OFFCHANNEL
wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS pending_dst="
MACSTR, MAC2STR(wpa_s->parent->pending_action_dst));
/*
* Catch TX status events for Action frames we sent via group
* interface in GO mode.
*/
if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
data->tx_status.stype == WLAN_FC_STYPE_ACTION &&
os_memcmp(wpa_s->parent->pending_action_dst,
data->tx_status.dst, ETH_ALEN) == 0) {
offchannel_send_action_tx_status(
wpa_s->parent, data->tx_status.dst,
data->tx_status.data,
data->tx_status.data_len,
data->tx_status.ack ?
OFFCHANNEL_SEND_ACTION_SUCCESS :
OFFCHANNEL_SEND_ACTION_NO_ACK);
break;
}
#endif /* CONFIG_OFFCHANNEL */
#ifdef CONFIG_AP
switch (data->tx_status.type) {
case WLAN_FC_TYPE_MGMT:
ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
data->tx_status.data_len,
data->tx_status.stype,
data->tx_status.ack);
break;
case WLAN_FC_TYPE_DATA:
ap_tx_status(wpa_s, data->tx_status.dst,
data->tx_status.data,
data->tx_status.data_len,
data->tx_status.ack);
break;
}
#endif /* CONFIG_AP */
break;
#ifdef CONFIG_AP
case EVENT_EAPOL_TX_STATUS:
ap_eapol_tx_status(wpa_s, data->eapol_tx_status.dst,
data->eapol_tx_status.data,
data->eapol_tx_status.data_len,
data->eapol_tx_status.ack);
break;
case EVENT_DRIVER_CLIENT_POLL_OK:
ap_client_poll_ok(wpa_s, data->client_poll.addr);
break;
case EVENT_RX_FROM_UNKNOWN:
if (wpa_s->ap_iface == NULL)
break;
ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.addr,
data->rx_from_unknown.wds);
break;
case EVENT_CH_SWITCH:
if (!data)
break;
if (!wpa_s->ap_iface) {
wpa_dbg(wpa_s, MSG_DEBUG, "AP: Ignore channel switch "
"event in non-AP mode");
break;
}
#ifdef CONFIG_AP
wpas_ap_ch_switch(wpa_s, data->ch_switch.freq,
data->ch_switch.ht_enabled,
data->ch_switch.ch_offset);
#endif /* CONFIG_AP */
break;
case EVENT_RX_MGMT:</