blob: 815b9947ee2f17ed2b12f666c737ebe980542379 [file] [log] [blame]
/*
* WPA Supplicant - Driver event processing
* Copyright (c) 2003-2019, 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 "fst/fst.h"
#include "wnm_sta.h"
#include "notify.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/gas_server.h"
#include "common/dpp.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"
#include "dpp_supplicant.h"
#define MAX_OWE_TRANSITION_BSS_SELECT_COUNT 5
#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 */
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;
}
#ifndef CONFIG_NO_SCAN_PROCESSING
/**
* 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;
}
#endif /* CONFIG_NO_SCAN_PROCESSING */
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 */
#ifdef CONFIG_HS20
/* Clear possibly configured frame filters */
wpa_drv_configure_frame_filters(wpa_s, 0);
#endif /* CONFIG_HS20 */
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
return;
if (os_reltime_initialized(&wpa_s->session_start)) {
os_reltime_age(&wpa_s->session_start, &wpa_s->session_length);
wpa_s->session_start.sec = 0;
wpa_s->session_start.usec = 0;
wpas_notify_session_length(wpa_s);
}
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);
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) ||
wpa_s->key_mgmt == WPA_KEY_MGMT_OWE ||
wpa_s->key_mgmt == WPA_KEY_MGMT_DPP)
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);
wpa_s->wnmsleep_used = 0;
wnm_clear_coloc_intf_reporting(wpa_s);
#ifdef CONFIG_TESTING_OPTIONS
wpa_s->last_tk_alg = WPA_ALG_NONE;
os_memset(wpa_s->last_tk, 0, sizeof(wpa_s->last_tk));
#endif /* CONFIG_TESTING_OPTIONS */
wpa_s->ieee80211ac = 0;
if (wpa_s->enabled_4addr_mode && wpa_drv_set_4addr_mode(wpa_s, 0) == 0)
wpa_s->enabled_4addr_mode = 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, 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 */
#ifdef CONFIG_OWE
if ((ssid->key_mgmt & WPA_KEY_MGMT_OWE) && !ssid->owe_only)
return 1;
#endif /* CONFIG_OWE */
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, int debug_print)
{
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 | WPA_PROTO_OSEN)) && rsn_ie) {
proto_match++;
if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - parse failed");
break;
}
if (!ie.has_pairwise)
ie.pairwise_cipher = wpa_default_rsn_cipher(bss->freq);
if (!ie.has_group)
ie.group_cipher = wpa_default_rsn_cipher(bss->freq);
if (wep_ok &&
(ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
{
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" selected based on TSN in RSN IE");
return 1;
}
if (!(ie.proto & ssid->proto) &&
!(ssid->proto & WPA_PROTO_OSEN)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - proto mismatch");
break;
}
if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - PTK cipher mismatch");
break;
}
if (!(ie.group_cipher & ssid->group_cipher)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - GTK cipher mismatch");
break;
}
if (ssid->group_mgmt_cipher &&
!(ie.mgmt_group_cipher & ssid->group_mgmt_cipher)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - group mgmt cipher mismatch");
break;
}
if (!(ie.key_mgmt & ssid->key_mgmt)) {
if (debug_print)
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) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - no mgmt frame protection");
break;
}
#endif /* CONFIG_IEEE80211W */
if ((ie.capabilities & WPA_CAPABILITY_MFPR) &&
wpas_get_ssid_pmf(wpa_s, ssid) ==
NO_MGMT_FRAME_PROTECTION) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - no mgmt frame protection enabled but AP requires it");
break;
}
#ifdef CONFIG_MBO
if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
wpas_mbo_get_bss_attr(bss, MBO_ATTR_ID_AP_CAPA_IND) &&
wpas_get_ssid_pmf(wpa_s, ssid) !=
NO_MGMT_FRAME_PROTECTION) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - no mgmt frame protection enabled on MBO AP");
break;
}
#endif /* CONFIG_MBO */
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" selected based on RSN IE");
return 1;
}
#ifdef CONFIG_IEEE80211W
if (wpas_get_ssid_pmf(wpa_s, ssid) == MGMT_FRAME_PROTECTION_REQUIRED &&
(!(ssid->key_mgmt & WPA_KEY_MGMT_OWE) || ssid->owe_only)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - MFP Required but network not MFP Capable");
return 0;
}
#endif /* CONFIG_IEEE80211W */
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)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip WPA IE - parse failed");
break;
}
if (wep_ok &&
(ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
{
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" selected based on TSN in WPA IE");
return 1;
}
if (!(ie.proto & ssid->proto)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip WPA IE - proto mismatch");
break;
}
if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip WPA IE - PTK cipher mismatch");
break;
}
if (!(ie.group_cipher & ssid->group_cipher)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip WPA IE - GTK cipher mismatch");
break;
}
if (!(ie.key_mgmt & ssid->key_mgmt)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip WPA IE - key mgmt mismatch");
break;
}
if (debug_print)
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) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" allow for non-WPA IEEE 802.1X");
return 1;
}
#ifdef CONFIG_OWE
if ((ssid->key_mgmt & WPA_KEY_MGMT_OWE) && !ssid->owe_only &&
!wpa_ie && !rsn_ie) {
if (wpa_s->owe_transition_select &&
wpa_bss_get_vendor_ie(bss, OWE_IE_VENDOR_TYPE) &&
ssid->owe_transition_bss_select_count + 1 <=
MAX_OWE_TRANSITION_BSS_SELECT_COUNT) {
ssid->owe_transition_bss_select_count++;
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip OWE transition BSS (selection count %d does not exceed %d)",
ssid->owe_transition_bss_select_count,
MAX_OWE_TRANSITION_BSS_SELECT_COUNT);
wpa_s->owe_transition_search = 1;
return 0;
}
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" allow in OWE transition mode");
return 1;
}
#endif /* CONFIG_OWE */
if ((ssid->proto & (WPA_PROTO_WPA | WPA_PROTO_RSN)) &&
wpa_key_mgmt_wpa(ssid->key_mgmt) && proto_match == 0) {
if (debug_print)
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)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " allow in OSEN");
return 1;
}
if (!wpa_key_mgmt_wpa(ssid->key_mgmt)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " allow in non-WPA/WPA2");
return 1;
}
if (debug_print)
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,
int debug_print)
{
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)) {
if (debug_print)
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)) {
if (debug_print)
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.
*/
if (debug_print)
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 void owe_trans_ssid(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
const u8 **ret_ssid, size_t *ret_ssid_len)
{
#ifdef CONFIG_OWE
const u8 *owe, *pos, *end, *bssid;
u8 ssid_len;
struct wpa_bss *open_bss;
owe = wpa_bss_get_vendor_ie(bss, OWE_IE_VENDOR_TYPE);
if (!owe || !wpa_bss_get_ie(bss, WLAN_EID_RSN))
return;
pos = owe + 6;
end = owe + 2 + owe[1];
if (end - pos < ETH_ALEN + 1)
return;
bssid = pos;
pos += ETH_ALEN;
ssid_len = *pos++;
if (end - pos < ssid_len || ssid_len > SSID_MAX_LEN)
return;
/* Match the profile SSID against the OWE transition mode SSID on the
* open network. */
wpa_dbg(wpa_s, MSG_DEBUG, "OWE: transition mode BSSID: " MACSTR
" SSID: %s", MAC2STR(bssid), wpa_ssid_txt(pos, ssid_len));
*ret_ssid = pos;
*ret_ssid_len = ssid_len;
if (bss->ssid_len > 0)
return;
open_bss = wpa_bss_get_bssid_latest(wpa_s, bssid);
if (!open_bss)
return;
if (ssid_len != open_bss->ssid_len ||
os_memcmp(pos, open_bss->ssid, ssid_len) != 0) {
wpa_dbg(wpa_s, MSG_DEBUG,
"OWE: transition mode SSID mismatch: %s",
wpa_ssid_txt(open_bss->ssid, open_bss->ssid_len));
return;
}
owe = wpa_bss_get_vendor_ie(open_bss, OWE_IE_VENDOR_TYPE);
if (!owe || wpa_bss_get_ie(open_bss, WLAN_EID_RSN)) {
wpa_dbg(wpa_s, MSG_DEBUG,
"OWE: transition mode open BSS unexpected info");
return;
}
pos = owe + 6;
end = owe + 2 + owe[1];
if (end - pos < ETH_ALEN + 1)
return;
if (os_memcmp(pos, bss->bssid, ETH_ALEN) != 0) {
wpa_dbg(wpa_s, MSG_DEBUG,
"OWE: transition mode BSSID mismatch: " MACSTR,
MAC2STR(pos));
return;
}
pos += ETH_ALEN;
ssid_len = *pos++;
if (end - pos < ssid_len || ssid_len > SSID_MAX_LEN)
return;
wpa_dbg(wpa_s, MSG_DEBUG, "OWE: learned transition mode OWE SSID: %s",
wpa_ssid_txt(pos, ssid_len));
os_memcpy(bss->ssid, pos, ssid_len);
bss->ssid_len = ssid_len;
#endif /* CONFIG_OWE */
}
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, int debug_print)
{
u8 wpa_ie_len, rsn_ie_len;
int wpa;
struct wpa_blacklist *e;
const u8 *ie;
struct wpa_ssid *ssid;
int osen, rsn_osen = 0;
#ifdef CONFIG_MBO
const u8 *assoc_disallow;
#endif /* CONFIG_MBO */
const u8 *match_ssid;
size_t match_ssid_len;
struct wpa_ie_data data;
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;
if (ie && wpa_parse_wpa_ie_rsn(ie, 2 + ie[1], &data) == 0 &&
(data.key_mgmt & WPA_KEY_MGMT_OSEN))
rsn_osen = 1;
ie = wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE);
osen = ie != NULL;
if (debug_print) {
wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR
" ssid='%s' wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d freq=%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,
bss->freq,
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) {
if (debug_print) {
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - blacklisted (count=%d limit=%d)",
e->count, limit);
}
return NULL;
}
}
match_ssid = bss->ssid;
match_ssid_len = bss->ssid_len;
owe_trans_ssid(wpa_s, bss, &match_ssid, &match_ssid_len);
if (match_ssid_len == 0) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID not known");
return NULL;
}
if (disallowed_bssid(wpa_s, bss->bssid)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID disallowed");
return NULL;
}
if (disallowed_ssid(wpa_s, match_ssid, match_ssid_len)) {
if (debug_print)
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)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled");
continue;
}
res = wpas_temp_disabled(wpa_s, ssid);
if (res > 0) {
if (debug_print)
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) {
if (debug_print)
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 &&
(match_ssid_len != ssid->ssid_len ||
os_memcmp(match_ssid, ssid->ssid, match_ssid_len) != 0)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - SSID mismatch");
continue;
}
if (ssid->bssid_set &&
os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
if (debug_print)
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)) {
if (debug_print)
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)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - BSSID not in whitelist");
continue;
}
if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss,
debug_print))
continue;
if (!osen && !wpa &&
!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
!(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
!(ssid->key_mgmt & WPA_KEY_MGMT_OWE) &&
!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) {
if (debug_print)
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)) {
if (debug_print)
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 &&
!rsn_osen) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - non-OSEN network not allowed");
continue;
}
if (!wpa_supplicant_match_privacy(bss, ssid)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - privacy mismatch");
continue;
}
if (ssid->mode != IEEE80211_MODE_MESH && !bss_is_ess(bss) &&
!bss_is_pbss(bss)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - not ESS, PBSS, or MBSS");
continue;
}
if (ssid->pbss != 2 && ssid->pbss != bss_is_pbss(bss)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - PBSS mismatch (ssid %d bss %d)",
ssid->pbss, bss_is_pbss(bss));
continue;
}
if (!freq_allowed(ssid->freq_list, bss->freq)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - frequency not allowed");
continue;
}
#ifdef CONFIG_MESH
if (ssid->mode == IEEE80211_MODE_MESH && ssid->frequency > 0 &&
ssid->frequency != bss->freq) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - frequency not allowed (mesh)");
continue;
}
#endif /* CONFIG_MESH */
if (!rate_match(wpa_s, bss, debug_print)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - rate sets do not match");
continue;
}
#ifndef CONFIG_IBSS_RSN
if (ssid->mode == WPAS_MODE_IBSS &&
!(ssid->key_mgmt & (WPA_KEY_MGMT_NONE |
WPA_KEY_MGMT_WPA_NONE))) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - IBSS RSN not supported in the build");
continue;
}
#endif /* !CONFIG_IBSS_RSN */
#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)) {
if (debug_print)
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) {
if (debug_print)
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) {
if (debug_print)
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) {
if (debug_print)
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 */
if (os_reltime_before(&bss->last_update, &wpa_s->scan_min_time))
{
struct os_reltime diff;
os_reltime_sub(&wpa_s->scan_min_time,
&bss->last_update, &diff);
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - scan result not recent enough (%u.%06u seconds too old)",
(unsigned int) diff.sec,
(unsigned int) diff.usec);
continue;
}
#ifdef CONFIG_MBO
#ifdef CONFIG_TESTING_OPTIONS
if (wpa_s->ignore_assoc_disallow)
goto skip_assoc_disallow;
#endif /* CONFIG_TESTING_OPTIONS */
assoc_disallow = wpas_mbo_get_bss_attr(
bss, MBO_ATTR_ID_ASSOC_DISALLOW);
if (assoc_disallow && assoc_disallow[1] >= 1) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - MBO association disallowed (reason %u)",
assoc_disallow[2]);
continue;
}
if (wpa_is_bss_tmp_disallowed(wpa_s, bss)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - AP temporarily disallowed");
continue;
}
#ifdef CONFIG_TESTING_OPTIONS
skip_assoc_disallow:
#endif /* CONFIG_TESTING_OPTIONS */
#endif /* CONFIG_MBO */
#ifdef CONFIG_DPP
if ((ssid->key_mgmt & WPA_KEY_MGMT_DPP) &&
!wpa_sm_pmksa_exists(wpa_s->wpa, bss->bssid, ssid) &&
(!ssid->dpp_connector ||
!ssid->dpp_netaccesskey ||
!ssid->dpp_csign)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - no PMKSA entry for DPP");
continue;
}
#endif /* CONFIG_DPP */
/* 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 (wpa_s->current_ssid) {
struct wpa_ssid *ssid;
wpa_dbg(wpa_s, MSG_DEBUG,
"Scan results matching the currently selected network");
for (i = 0; i < wpa_s->last_scan_res_used; i++) {
struct wpa_bss *bss = wpa_s->last_scan_res[i];
ssid = wpa_scan_res_match(wpa_s, i, bss, group,
only_first_ssid, 0);
if (ssid != wpa_s->current_ssid)
continue;
wpa_dbg(wpa_s, MSG_DEBUG, "%u: " MACSTR
" freq=%d level=%d snr=%d est_throughput=%u",
i, MAC2STR(bss->bssid), bss->freq, bss->level,
bss->snr, bss->est_throughput);
}
}
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];
wpa_s->owe_transition_select = 1;
*selected_ssid = wpa_scan_res_match(wpa_s, i, bss, group,
only_first_ssid, 1);
wpa_s->owe_transition_select = 0;
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_pbc_overlap(wpa_s);
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;
#ifndef CONFIG_IBSS_RSN
if (ssid->mode == WPAS_MODE_IBSS &&
!(ssid->key_mgmt & (WPA_KEY_MGMT_NONE |
WPA_KEY_MGMT_WPA_NONE))) {
wpa_msg(wpa_s, MSG_INFO,
"IBSS RSN not supported in the build - cannot use the profile for SSID '%s'",
wpa_ssid_txt(ssid->ssid,
ssid->ssid_len));
continue;
}
#endif /* !CONFIG_IBSS_RSN */
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, diff;
int to_5ghz;
int cur_est, sel_est;
#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
" freq=%d level=%d snr=%d est_throughput=%u",
MAC2STR(current_bss->bssid),
current_bss->freq, current_bss->level,
current_bss->snr, current_bss->est_throughput);
wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR
" freq=%d level=%d snr=%d est_throughput=%u",
MAC2STR(selected->bssid), selected->freq, 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;
}
to_5ghz = selected->freq > 4000 && current_bss->freq < 4000;
if (current_bss->level < 0 &&
current_bss->level > selected->level + to_5ghz * 2) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - Current BSS has better "
"signal level");
return 0;
}
if (current_bss->est_throughput > selected->est_throughput + 5000) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Skip roam - Current BSS has better estimated throughput");
return 0;
}
cur_est = current_bss->est_throughput;
sel_est = selected->est_throughput;
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 (cur_est > sel_est * 1.5)
min_diff += 10;
else if (cur_est > sel_est * 1.2)
min_diff += 5;
else if (cur_est > sel_est * 1.1)
min_diff += 2;
else if (cur_est > sel_est)
min_diff++;
}
if (to_5ghz) {
int reduce = 2;
/* Make it easier to move to 5 GHz band */
if (sel_est > cur_est * 1.5)
reduce = 5;
else if (sel_est > cur_est * 1.2)
reduce = 4;
else if (sel_est > cur_est * 1.1)
reduce = 3;
if (min_diff > reduce)
min_diff -= reduce;
else
min_diff = 0;
}
diff = abs(current_bss->level - selected->level);
if (diff < min_diff) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Skip roam - too small difference in signal level (%d < %d)",
diff, min_diff);
return 0;
}
wpa_dbg(wpa_s, MSG_DEBUG,
"Allow reassociation due to difference in signal level (%d >= %d)",
diff, min_diff);
return 1;
#else /* CONFIG_NO_ROAMING */
return 0;
#endif /* CONFIG_NO_ROAMING */
}
/*
* Return a negative value if no scan results could be fetched or if scan
* results should not be shared with other virtual interfaces.
* Return 0 if scan results were fetched and may be shared with other
* interfaces.
* Return 1 if scan results may be shared with other virtual interfaces but may
* not trigger any operations.
* Return 2 if the interface was removed and cannot be used.
*/
static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
union wpa_event_data *data,
int own_request, int update_only)
{
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;
if (data && data->scan_info.external_scan)
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 (update_only) {
ret = 1;
goto scan_work_done;
}
if (own_request && wpa_s->scan_res_handler &&
!(data && data->scan_info.external_scan)) {
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 = 1;
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,
data ? data->scan_info.external_scan : 0);
if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
wpa_s->manual_scan_use_id && wpa_s->own_scan_running &&
own_request && !(data && data->scan_info.external_scan)) {
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 (data && data->scan_info.external_scan) {
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 (own_request && data &&
wpas_beacon_rep_scan_process(wpa_s, scan_res, &data->scan_info) > 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);
if (wpa_s->wpa_state >= WPA_AUTHENTICATING &&
wpa_s->wpa_state < WPA_COMPLETED)
goto scan_work_done;
wpa_scan_results_free(scan_res);
if (own_request && 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 (own_request && 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 */
wpa_s->owe_transition_search = 0;
selected = wpa_supplicant_pick_network(wpa_s, &ssid);
#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 */
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 (ssid != wpa_s->current_ssid &&
wpa_s->wpa_state >= WPA_AUTHENTICATING) {
wpa_s->own_disconnect_req = 1;
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_DEAUTH_LEAVING);
}
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 allow other virtual radios to trigger operations based
* on these 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);
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 */
#ifdef CONFIG_OWE
if (wpa_s->owe_transition_search) {
wpa_dbg(wpa_s, MSG_DEBUG,
"OWE: Use shorter wait during transition mode search");
timeout_sec = 0;
timeout_usec = 500000;
wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
timeout_usec);
return 0;
}
#endif /* CONFIG_OWE */
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, 0);
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);
res = _wpa_supplicant_event_scan_results(ifs, data, 0,
res > 0);
if (res < 0)
return 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;
wpa_s->ignore_post_flush_scan_res = 0;
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 void multi_ap_process_assoc_resp(struct wpa_supplicant *wpa_s,
const u8 *ies, size_t ies_len)
{
struct ieee802_11_elems elems;
const u8 *map_sub_elem, *pos;
size_t len;
if (!wpa_s->current_ssid ||
!wpa_s->current_ssid->multi_ap_backhaul_sta ||
!ies ||
ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed)
return;
if (!elems.multi_ap || elems.multi_ap_len < 7) {
wpa_printf(MSG_INFO, "AP doesn't support Multi-AP protocol");
goto fail;
}
pos = elems.multi_ap + 4;
len = elems.multi_ap_len - 4;
map_sub_elem = get_ie(pos, len, MULTI_AP_SUB_ELEM_TYPE);
if (!map_sub_elem || map_sub_elem[1] < 1) {
wpa_printf(MSG_INFO, "invalid Multi-AP sub elem type");
goto fail;
}
if (!(map_sub_elem[2] & MULTI_AP_BACKHAUL_BSS)) {
if ((map_sub_elem[2] & MULTI_AP_FRONTHAUL_BSS) &&
wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
wpa_printf(MSG_INFO,
"WPS active, accepting fronthaul-only BSS");
/* Don't set 4addr mode in this case, so just return */
return;
}
wpa_printf(MSG_INFO, "AP doesn't support backhaul BSS");
goto fail;
}
if (wpa_drv_set_4addr_mode(wpa_s, 1) < 0) {
wpa_printf(MSG_ERROR, "Failed to set 4addr mode");
goto fail;
}
wpa_s->enabled_4addr_mode = 1;
return;
fail:
wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
}
#ifdef CONFIG_FST
static int wpas_fst_update_mbie(struct wpa_supplicant *wpa_s,
const u8 *ie, size_t ie_len)
{
struct mb_ies_info mb_ies;
if (!ie || !ie_len || !wpa_s->fst)
return -ENOENT;
os_memset(&mb_ies, 0, sizeof(mb_ies));
while (ie_len >= 2 && mb_ies.nof_ies < MAX_NOF_MB_IES_SUPPORTED) {
size_t len;
len = 2 + ie[1];
if (len > ie_len) {
wpa_hexdump(MSG_DEBUG, "FST: Truncated IE found",
ie, ie_len);
break;
}
if (ie[0] == WLAN_EID_MULTI_BAND) {
wpa_printf(MSG_DEBUG, "MB IE of %u bytes found",
(unsigned int) len);
mb_ies.ies[mb_ies.nof_ies].ie = ie + 2;
mb_ies.ies[mb_ies.nof_ies].ie_len = len - 2;
mb_ies.nof_ies++;
}
ie_len -= len;
ie += len;
}
if (mb_ies.nof_ies > 0) {
wpabuf_free(wpa_s->received_mb_ies);
wpa_s->received_mb_ies = mb_ies_by_info(&mb_ies);
return 0;
}
return -ENOENT;
}
#endif /* CONFIG_FST */
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;
#if defined(CONFIG_IEEE80211R) || defined(CONFIG_OWE)
u8 bssid[ETH_ALEN];
#endif /* CONFIG_IEEE80211R || CONFIG_OWE */
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 (wpa_s->hw_capab == CAPAB_VHT &&
get_ie(data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len, WLAN_EID_VHT_CAP))
wpa_s->ieee80211ac = 1;
multi_ap_process_assoc_resp(wpa_s, data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len);
}
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);
wpa_s->connection_set = 0;
if (data->assoc_info.req_ies && data->assoc_info.resp_ies) {
struct ieee802_11_elems req_elems, resp_elems;
if (ieee802_11_parse_elems(data->assoc_info.req_ies,
data->assoc_info.req_ies_len,
&req_elems, 0) != ParseFailed &&
ieee802_11_parse_elems(data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len,
&resp_elems, 0) != ParseFailed) {
wpa_s->connection_set = 1;
wpa_s->connection_ht = req_elems.ht_capabilities &&
resp_elems.ht_capabilities;
wpa_s->connection_vht = req_elems.vht_capabilities &&
resp_elems.vht_capabilities;
wpa_s->connection_he = req_elems.he_capabilities &&
resp_elems.he_capabilities;
}
}
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_VENDOR_SPECIFIC && p[1] >= 4 &&
(os_memcmp(&p[2], "\x50\x6F\x9A\x12", 4) == 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_FILS
#ifdef CONFIG_SME
if ((wpa_s->sme.auth_alg == WPA_AUTH_ALG_FILS ||
wpa_s->sme.auth_alg == WPA_AUTH_ALG_FILS_SK_PFS) &&
(!data->assoc_info.resp_frame ||
fils_process_assoc_resp(wpa_s->wpa,
data->assoc_info.resp_frame,
data->assoc_info.resp_frame_len) < 0)) {
wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_UNSPECIFIED);
return -1;
}
#endif /* CONFIG_SME */
/* Additional processing for FILS when SME is in driver */
if (wpa_s->auth_alg == WPA_AUTH_ALG_FILS &&
!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
wpa_sm_set_reset_fils_completed(wpa_s->wpa, 1);
#endif /* CONFIG_FILS */
#ifdef CONFIG_OWE
if (wpa_s->key_mgmt == WPA_KEY_MGMT_OWE &&
(wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
owe_process_assoc_resp(wpa_s->wpa, bssid,
data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len) < 0)) {
wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_UNSPECIFIED);
return -1;
}
#endif /* CONFIG_OWE */
#ifdef CONFIG_DPP2
wpa_sm_set_dpp_z(wpa_s->wpa, NULL);
if (wpa_s->key_mgmt == WPA_KEY_MGMT_DPP && wpa_s->dpp_pfs) {
struct ieee802_11_elems elems;
if (ieee802_11_parse_elems(data->assoc_info.resp_ies,
data->assoc_info.resp_ies_len,
&elems, 0) == ParseFailed ||
!elems.owe_dh)
goto no_pfs;
if (dpp_pfs_process(wpa_s->dpp_pfs, elems.owe_dh,
elems.owe_dh_len) < 0) {
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_UNSPECIFIED);
return -1;
}
wpa_sm_set_dpp_z(wpa_s->wpa, wpa_s->dpp_pfs->secret);
}
no_pfs:
#endif /* CONFIG_DPP2 */
#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 wpas_fst_update_mb_assoc(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
#ifdef CONFIG_FST
struct assoc_info *ai = data ? &data->assoc_info : NULL;
struct wpa_bss *bss = wpa_s->current_bss;
const u8 *ieprb, *iebcn;
wpabuf_free(wpa_s->received_mb_ies);
wpa_s->received_mb_ies = NULL;
if (ai &&
!wpas_fst_update_mbie(wpa_s, ai->resp_ies, ai->resp_ies_len)) {
wpa_printf(MSG_DEBUG,
"FST: MB IEs updated from Association Response frame");
return;
}
if (ai &&
!wpas_fst_update_mbie(wpa_s, ai->beacon_ies, ai->beacon_ies_len)) {
wpa_printf(MSG_DEBUG,
"FST: MB IEs updated from association event Beacon IEs");
return;
}
if (!bss)
return;
ieprb = (const u8 *) (bss + 1);