blob: 6b0c6859034694354ce0c191298b7239bb41f186 [file] [log] [blame]
/*
* WPA Supplicant - Driver event processing
* Copyright (c) 2003-2015, 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"
#include "mesh.h"
#include "mesh_mpm.h"
#include "wmm_ac.h"
#ifndef CONFIG_NO_SCAN_PROCESSING
static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s,
int new_scan, int own_request);
#endif /* CONFIG_NO_SCAN_PROCESSING */
static int wpas_temp_disabled(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
struct os_reltime now;
if (ssid == NULL || ssid->disabled_until.sec == 0)
return 0;
os_get_reltime(&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;
}
/**
* wpas_reenabled_network_time - Time until first network is re-enabled
* @wpa_s: Pointer to wpa_supplicant data
* Returns: If all enabled networks are temporarily disabled, returns the time
* (in sec) until the first network is re-enabled. Otherwise returns 0.
*
* This function is used in case all enabled networks are temporarily disabled,
* in which case it returns the time (in sec) that the first network will be
* re-enabled. The function assumes that at least one network is enabled.
*/
static int wpas_reenabled_network_time(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid;
int disabled_for, res = 0;
#ifdef CONFIG_INTERWORKING
if (wpa_s->conf->auto_interworking && wpa_s->conf->interworking &&
wpa_s->conf->cred)
return 0;
#endif /* CONFIG_INTERWORKING */
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if (ssid->disabled)
continue;
disabled_for = wpas_temp_disabled(wpa_s, ssid);
if (!disabled_for)
return 0;
if (!res || disabled_for < res)
res = disabled_for;
}
return res;
}
void wpas_network_reenabled(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->disconnected || wpa_s->wpa_state != WPA_SCANNING)
return;
wpa_dbg(wpa_s, MSG_DEBUG,
"Try to associate due to network getting re-enabled");
if (wpa_supplicant_fast_associate(wpa_s) != 1) {
wpa_supplicant_cancel_sched_scan(wpa_s);
wpa_supplicant_req_scan(wpa_s, 0, 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 void wpa_supplicant_update_current_bss(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss = wpa_supplicant_get_new_bss(wpa_s, 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, wpa_s->bssid);
}
if (bss)
wpa_s->current_bss = bss;
}
static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid, *old_ssid;
u8 drv_ssid[SSID_MAX_LEN];
size_t drv_ssid_len;
int res;
if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid) {
wpa_supplicant_update_current_bss(wpa_s);
if (wpa_s->current_ssid->ssid_len == 0)
return 0; /* current profile still in use */
res = wpa_drv_get_ssid(wpa_s, drv_ssid);
if (res < 0) {
wpa_msg(wpa_s, MSG_INFO,
"Failed to read SSID from driver");
return 0; /* try to use current profile */
}
drv_ssid_len = res;
if (drv_ssid_len == wpa_s->current_ssid->ssid_len &&
os_memcmp(drv_ssid, wpa_s->current_ssid->ssid,
drv_ssid_len) == 0)
return 0; /* current profile still in use */
wpa_msg(wpa_s, MSG_DEBUG,
"Driver-initiated BSS selection changed the SSID to %s",
wpa_ssid_txt(drv_ssid, drv_ssid_len));
/* continue selecting a new network profile */
}
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_update_current_bss(wpa_s);
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");
/*
* It is possible that the device is sched scanning, which means
* that a connection attempt will be done only when we receive
* scan results. However, in this case, it would be preferable
* to scan and connect immediately, so cancel the sched_scan and
* issue a regular scan flow.
*/
wpa_supplicant_cancel_sched_scan(wpa_s);
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);
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);
sme_clear_on_disassoc(wpa_s);
#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;
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;
eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
wpa_s->key_mgmt = 0;
wpas_rrm_reset(wpa_s);
}
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);
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;
if ((ssid != NULL && ssid->eap.pcsc == NULL) ||
wpa_s->scard != NULL || wpa_s->conf->external_sim)
return 0;
if (ssid == NULL || 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);
wpa_s->scard = scard_init(wpa_s->conf->pcsc_reader);
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 has_wep_key(struct wpa_ssid *ssid)
{
int i;
for (i = 0; i < NUM_WEP_KEYS; i++) {
if (ssid->wep_key_len[i])
return 1;
}
return 0;
}
static int wpa_supplicant_match_privacy(struct wpa_bss *bss,
struct wpa_ssid *ssid)
{
int privacy = 0;
if (ssid->mixed_cell)
return 1;
#ifdef CONFIG_WPS
if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
return 1;
#endif /* CONFIG_WPS */
if (has_wep_key(ssid))
privacy = 1;
#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 (ssid->key_mgmt & WPA_KEY_MGMT_OSEN)
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) &&
wpas_get_ssid_pmf(wpa_s, ssid) ==
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 ((ssid->key_mgmt & WPA_KEY_MGMT_OSEN) &&
wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE)) {
wpa_dbg(wpa_s, MSG_DEBUG, " allow in OSEN");
return 1;
}
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 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;
}
/* There's also a VHT selector for 802.11ac */
if (flagged && ((rate_ie[j] & 0x7f) ==
BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) {
if (!vht_supported(mode)) {
wpa_dbg(wpa_s, MSG_DEBUG,
" hardware does not support "
"VHT 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 (freq=%d mode==%d num_rates=%d)",
r / 10, r % 10,
bss->freq, mode->mode, mode->num_rates);
return 0;
}
}
}
return 1;
}
/*
* 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 int match_mac_mask(const u8 *addr_a, const u8 *addr_b, const u8 *mask)
{
size_t i;
for (i = 0; i < ETH_ALEN; i++) {
if ((addr_a[i] & mask[i]) != (addr_b[i] & mask[i]))
return 0;
}
return 1;
}
static int addr_in_list(const u8 *addr, const u8 *list, size_t num)
{
size_t i;
for (i = 0; i < num; i++) {
const u8 *a = list + i * ETH_ALEN * 2;
const u8 *m = a + ETH_ALEN;
if (match_mac_mask(a, addr, m))
return 1;
}
return 0;
}
static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
int i, struct wpa_bss *bss,
struct wpa_ssid *group,
int only_first_ssid)
{
u8 wpa_ie_len, rsn_ie_len;
int wpa;
struct wpa_blacklist *e;
const u8 *ie;
struct wpa_ssid *ssid;
int osen;
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;
ie = wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE);
osen = ie != NULL;
wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
"wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d%s%s%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" : "",
(wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) ||
wpa_bss_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) ?
" p2p" : "",
osen ? " osen=1" : "");
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 = only_first_ssid ? NULL : 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;
}
/* check blacklist */
if (ssid->num_bssid_blacklist &&
addr_in_list(bss->bssid, ssid->bssid_blacklist,
ssid->num_bssid_blacklist)) {
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - BSSID blacklisted");
continue;
}
/* if there is a whitelist, only accept those APs */
if (ssid->num_bssid_whitelist &&
!addr_in_list(bss->bssid, ssid->bssid_whitelist,
ssid->num_bssid_whitelist)) {
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - BSSID not in whitelist");
continue;
}
if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
continue;
if (!osen && !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 && !wpa_key_mgmt_wpa(ssid->key_mgmt) &&
has_wep_key(ssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - ignore WPA/WPA2 AP for WEP network block");
continue;
}
if ((ssid->key_mgmt & WPA_KEY_MGMT_OSEN) && !osen) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - non-OSEN 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
if (ssid->p2p_group &&
!wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) &&
!wpa_bss_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - no P2P IE seen");
continue;
}
if (!is_zero_ether_addr(ssid->go_p2p_dev_addr)) {
struct wpabuf *p2p_ie;
u8 dev_addr[ETH_ALEN];
ie = wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE);
if (ie == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - no P2P element");
continue;
}
p2p_ie = wpa_bss_get_vendor_ie_multi(
bss, P2P_IE_VENDOR_TYPE);
if (p2p_ie == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - could not fetch P2P element");
continue;
}
if (p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr) < 0
|| os_memcmp(dev_addr, ssid->go_p2p_dev_addr,
ETH_ALEN) != 0) {
wpa_dbg(wpa_s, MSG_DEBUG, " skip - no matching GO P2P Device Address in P2P element");
wpabuf_free(p2p_ie);
continue;
}
wpabuf_free(p2p_ie);
}
/*
* 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,
int only_first_ssid)
{
unsigned int i;
if (only_first_ssid)
wpa_dbg(wpa_s, MSG_DEBUG, "Try to find BSS matching pre-selected network id=%d",
group->id);
else
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,
only_first_ssid);
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;
struct wpa_ssid *next_ssid = NULL;
struct wpa_ssid *ssid;
if (wpa_s->last_scan_res == NULL ||
wpa_s->last_scan_res_used == 0)
return NULL; /* no scan results from last update */
if (wpa_s->next_ssid) {
/* check that next_ssid is still valid */
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if (ssid == wpa_s->next_ssid)
break;
}
next_ssid = ssid;
wpa_s->next_ssid = NULL;
}
while (selected == NULL) {
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
if (next_ssid && next_ssid->priority ==
wpa_s->conf->pssid[prio]->priority) {
selected = wpa_supplicant_select_bss(
wpa_s, next_ssid, selected_ssid, 1);
if (selected)
break;
}
selected = wpa_supplicant_select_bss(
wpa_s, wpa_s->conf->pssid[prio],
selected_ssid, 0);
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;
}
ssid = *selected_ssid;
if (selected && ssid && ssid->mem_only_psk && !ssid->psk_set &&
!ssid->passphrase && !ssid->ext_psk) {
const char *field_name, *txt = NULL;
wpa_dbg(wpa_s, MSG_DEBUG,
"PSK/passphrase not yet available for the selected network");
wpas_notify_network_request(wpa_s, ssid,
WPA_CTRL_REQ_PSK_PASSPHRASE, NULL);
field_name = wpa_supplicant_ctrl_req_to_string(
WPA_CTRL_REQ_PSK_PASSPHRASE, NULL, &txt);
if (field_name == NULL)
return NULL;
wpas_send_ctrl_req(wpa_s, ssid, field_name, txt);
selected = NULL;
}
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);
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");
wpas_notify_wps_event_pbc_overlap(wpa_s);
#ifdef CONFIG_P2P
if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT ||
wpa_s->p2p_in_provisioning) {
eloop_register_timeout(0, 0, wpas_p2p_pbc_overlap_cb,
wpa_s, NULL);
return -1;
}
#endif /* CONFIG_P2P */
#ifdef CONFIG_WPS
wpas_wps_cancel(wpa_s);
#endif /* CONFIG_WPS */
return -1;
}
wpa_msg(wpa_s, MSG_DEBUG,
"Considering connect request: reassociate: %d selected: "
MACSTR " bssid: " MACSTR " pending: " MACSTR
" wpa_state: %s ssid=%p current_ssid=%p",
wpa_s->reassociate, MAC2STR(selected->bssid),
MAC2STR(wpa_s->bssid), MAC2STR(wpa_s->pending_bssid),
wpa_supplicant_state_txt(wpa_s->wpa_state),
ssid, wpa_s->current_ssid);
/*
* 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) ||
(!is_zero_ether_addr(wpa_s->pending_bssid) &&
os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
0) ||
(is_zero_ether_addr(wpa_s->pending_bssid) &&
ssid != wpa_s->current_ssid)))) {
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 with " MACSTR,
MAC2STR(selected->bssid));
wpa_supplicant_associate(wpa_s, selected, ssid);
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "Already associated or trying to "
"connect 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 ||
ssid->mode == IEEE80211_MODE_MESH)
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;
#ifndef CONFIG_NO_ROAMING
int min_diff;
#endif /* CONFIG_NO_ROAMING */
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 snr=%d est_throughput=%u",
MAC2STR(current_bss->bssid), current_bss->level,
current_bss->snr, current_bss->est_throughput);
wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR
" level=%d snr=%d est_throughput=%u",
MAC2STR(selected->bssid), selected->level,
selected->snr, selected->est_throughput);
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 (selected->est_throughput > current_bss->est_throughput + 5000) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Allow reassociation - selected BSS has better estimated throughput");
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 = NULL;
int ret = 0;
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);
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);
ret = -1;
goto scan_work_done;
}
#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 &&
(wpa_s->own_scan_running || !wpa_s->radio->external_scan_running)) {
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);
ret = -2;
goto scan_work_done;
}
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 */
goto scan_work_done;
}
wpa_dbg(wpa_s, MSG_DEBUG, "New scan results available (own=%u ext=%u)",
wpa_s->own_scan_running, wpa_s->radio->external_scan_running);
if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
wpa_s->manual_scan_id);
wpa_s->manual_scan_use_id = 0;
} else {
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 (!wpa_s->own_scan_running && wpa_s->radio->external_scan_running) {
wpa_dbg(wpa_s, MSG_DEBUG, "Do not use results from externally requested scan operation for network selection");
wpa_scan_results_free(scan_res);
return 0;
}
if (wnm_scan_process(wpa_s, 1) > 0)
goto scan_work_done;
if (sme_proc_obss_scan(wpa_s) > 0)
goto scan_work_done;
if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
goto scan_work_done;
if (autoscan_notify_scan(wpa_s, scan_res))
goto scan_work_done;
if (wpa_s->disconnected) {
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
goto scan_work_done;
}
if (!wpas_driver_bss_selection(wpa_s) &&
bgscan_notify_scan(wpa_s, scan_res) == 1)
goto scan_work_done;
wpas_wps_update_ap_info(wpa_s, scan_res);
wpa_scan_results_free(scan_res);
if (wpa_s->scan_work) {
struct wpa_radio_work *work = wpa_s->scan_work;
wpa_s->scan_work = NULL;
radio_work_done(work);
}
return wpas_select_network_from_last_scan(wpa_s, 1, own_request);
scan_work_done:
wpa_scan_results_free(scan_res);
if (wpa_s->scan_work) {
struct wpa_radio_work *work = wpa_s->scan_work;
wpa_s->scan_work = NULL;
radio_work_done(work);
}
return ret;
}
static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s,
int new_scan, int own_request)
{
struct wpa_bss *selected;
struct wpa_ssid *ssid = NULL;
int time_to_reenable = wpas_reenabled_network_time(wpa_s);
if (time_to_reenable > 0) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Postpone network selection by %d seconds since all networks are disabled",
time_to_reenable);
eloop_cancel_timeout(wpas_network_reenabled, wpa_s, NULL);
eloop_register_timeout(time_to_reenable, 0,
wpas_network_reenabled, wpa_s, NULL);
return 0;
}
if (wpa_s->p2p_mgmt)
return 0; /* no normal connection on p2p_mgmt interface */
selected = wpa_supplicant_pick_network(wpa_s, &ssid);
if (selected) {
int skip;
skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid);
if (skip) {
if (new_scan)
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;
}
if (new_scan)
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 {
#ifdef CONFIG_MESH
if (wpa_s->ifmsh) {
wpa_msg(wpa_s, MSG_INFO,
"Avoiding join because we already joined a mesh group");
return 0;
}
#endif /* CONFIG_MESH */
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);
if (new_scan)
wpa_supplicant_rsn_preauth_scan_results(wpa_s);
} else if (own_request) {
/*
* No SSID found. If SCAN results are as a result of
* own scan request and not due to a scan request on
* another shared interface, try another scan.
*/
int timeout_sec = wpa_s->scan_interval;
int timeout_usec = 0;
#ifdef CONFIG_P2P
int res;
res = wpas_p2p_scan_no_go_seen(wpa_s);
if (res == 2)
return 2;
if (res == 1)
return 0;
if (wpa_s->p2p_in_provisioning ||
wpa_s->show_group_started ||
wpa_s->p2p_in_invitation) {
/*
* Use shorter wait during P2P Provisioning
* state and during P2P join-a-group operation
* 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 */
#ifdef CONFIG_WPS
if (wpa_s->after_wps > 0 || wpas_wps_searching(wpa_s)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Use shorter wait during WPS processing");
timeout_sec = 0;
timeout_usec = 500000;
wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
timeout_usec);
return 0;
}
#endif /* CONFIG_WPS */
if (wpa_supplicant_req_sched_scan(wpa_s))
wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
timeout_usec);
wpa_msg_ctrl(wpa_s, MSG_INFO,
WPA_EVENT_NETWORK_NOT_FOUND);
}
}
return 0;
}
static int wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
struct wpa_supplicant *ifs;
int res;
res = _wpa_supplicant_event_scan_results(wpa_s, data, 1);
if (res == 2) {
/*
* Interface may have been removed, so must not dereference
* wpa_s after this.
*/
return 1;
}
if (res != 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 0;
}
/*
* Check other interfaces to see if they share the same radio. If
* so, they get updated with this same scan info.
*/
dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant,
radio_list) {
if (ifs != wpa_s) {
wpa_printf(MSG_DEBUG, "%s: Updating scan results from "
"sibling", ifs->ifname);
_wpa_supplicant_event_scan_results(ifs, data, 0);
}
}
return 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_reltime now;
if (wpa_s->last_scan_res_used == 0)
return -1;
os_get_reltime(&now);
if (os_reltime_expired(&now, &wpa_s->last_scan, 5)) {
wpa_printf(MSG_DEBUG, "Fast associate: Old scan results");
return -1;
}
return wpas_select_network_from_last_scan(wpa_s, 0, 1);
#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 */
}
#ifdef CONFIG_INTERWORKING
static int wpas_qos_map_set(struct wpa_supplicant *wpa_s, const u8 *qos_map,
size_t len)
{
int res;
wpa_hexdump(MSG_DEBUG, "Interworking: QoS Map Set", qos_map, len);
res = wpa_drv_set_qos_map(wpa_s, qos_map, len);
if (res) {
wpa_printf(MSG_DEBUG, "Interworking: Failed to configure QoS Map Set to the driver");
}
return res;
}
static void interworking_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;
if (elems.qos_map_set) {
wpas_qos_map_set(wpa_s, elems.qos_map_set,
elems.qos_map_set_len);
}
}
#endif /* CONFIG_INTERWORKING */
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 */
#ifdef CONFIG_INTERWORKING
interworking_process_assoc_resp(wpa_s, data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len);
#endif /* CONFIG_INTERWORKING */
}
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 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;
int new_bss = 0;
#ifdef CONFIG_AP
if (wpa_s->ap_iface) {
if (!data)
return;
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 */
eloop_cancel_timeout(wpas_network_reenabled, wpa_s, NULL);
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));
new_bss = 1;
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;
}
}
#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 && new_bss)
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;
wpa_s->sme.last_unprot_disconnect.sec = 0;
#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)) {
if (wpa_s->current_ssid &&
wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE &&
(wpa_s->drv_flags &
WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE)) {
/*
* Set the key after having received joined-IBSS event
* from the driver.
*/
wpa_supplicant_set_wpa_none_key(wpa_s,
wpa_s->current_ssid);
}
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_reltime now, age;
os_get_reltime(&now);
os_reltime_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_s->drv_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);
if (data) {
wmm_ac_notify_assoc(wpa_s, data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len,
&data->assoc_info.wmm_params);
if (wpa_s->reassoc_same_bss)
wmm_ac_restore_tspecs(wpa_s);
}
}
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");
if (wpas_p2p_4way_hs_failed(wpa_s) > 0)
return; /* P2P group removed */
wpas_auth_failed(wpa_s, "WRONG_KEY");
}
if (!wpa_s->disconnected &&
(!wpa_s->auto_reconnect_disabled ||
wpa_s->key_mgmt == WPA_KEY_MGMT_WPS ||
wpas_wps_searching(wpa_s))) {
wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect enabled: try to "
"reconnect (wps=%d/%d wpa_state=%d)",
wpa_s->key_mgmt == WPA_KEY_MGMT_WPS,
wpas_wps_searching(wpa_s),
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)
wpa_supplicant_req_scan(wpa_s, 0, 100000);
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_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 &&
!wpas_network_disabled(wpa_s, fast_reconnect_ssid) &&
!disallowed_bssid(wpa_s, fast_reconnect->bssid) &&
!disallowed_ssid(wpa_s, fast_reconnect->ssid,
fast_reconnect->ssid_len) &&
!wpas_temp_disabled(wpa_s, fast_reconnect_ssid)) {
#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 */
} else if (fast_reconnect) {
/*
* Could not reconnect to the same BSS due to network being
* disabled. Use a new scan to match the alternative behavior
* above, i.e., to continue automatic reconnection attempt in a
* way that enforces disabled network rules.
*/
wpa_supplicant_req_scan(wpa_s, 0, 100000);
}
}
#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_reltime t;
wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
pairwise = (data && data->michael_mic_failure.unicast);
os_get_reltime(&t);
if ((wpa_s->last_michael_mic_error.sec &&
!os_reltime_expired(&t, &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;
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");
}
#ifdef CONFIG_P2P
if (!wpa_s->global->p2p &&
!wpa_s->global->p2p_disabled &&
!wpa_s->conf->p2p_disabled &&
(wpa_s->drv_flags &
WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE) &&
wpas_p2p_add_p2pdev_interface(
wpa_s, wpa_s->global->params.conf_p2p_dev) < 0) {
wpa_printf(MSG_INFO,
"P2P: Failed to enable P2P Device interface");
/* Try to continue without. P2P will be disabled. */
}
#endif /* CONFIG_P2P */
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_P2P
if (wpa_s->global->p2p &&
wpa_s->global->p2p_init_wpa_s->parent == wpa_s &&
(wpa_s->drv_flags &
WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE)) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Removing P2P Device interface");
wpa_supplicant_remove_iface(
wpa_s->global, wpa_s->global->p2p_init_wpa_s,
0);
wpa_s->global->p2p_init_wpa_s = NULL;
}
#endif /* CONFIG_P2P */
#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:
if (wpa_tdls_is_external_setup(wpa_s->wpa))
wpa_tdls_teardown_link(wpa_s->wpa, data->tdls.peer,
data->tdls.reason_code);
else
wpa_drv_tdls_oper(wpa_s, TDLS_TEARDOWN,
data->tdls.peer);
break;
case TDLS_REQUEST_DISCOVER:
wpa_tdls_send_discovery_request(wpa_s->wpa,
data->tdls.peer);
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);
}
static void wpa_supplicant_event_ibss_auth(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (ssid == NULL)
return;
/* check if the ssid is correctly configured as IBSS/RSN */
if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt))
return;
ibss_rsn_handle_auth(wpa_s->ibss_rsn, data->rx_mgmt.frame,
data->rx_mgmt.frame_len);
}
#endif /* CONFIG_IBSS_RSN */
#ifdef CONFIG_IEEE80211R
static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data,
size_t