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/*
* 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 "ap/sta_info.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 "common/ptksa_cache.h"
#include "crypto/random.h"
#include "bssid_ignore.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 "nan_usd.h"
#include "dpp_supplicant.h"
#include "utils/crc32.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,
bool trigger_6ghz_scan,
union wpa_event_data *data);
#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, const u8 *ssid,
size_t ssid_len)
{
if (ssid && ssid_len > 0)
return wpa_bss_get(wpa_s, bssid, ssid, ssid_len);
else
return wpa_bss_get_bssid(wpa_s, bssid);
}
static struct wpa_bss * _wpa_supplicant_get_new_bss(
struct wpa_supplicant *wpa_s, const u8 *bssid, const u8 *ssid,
size_t ssid_len, bool try_update_scan_results)
{
struct wpa_bss *bss = __wpa_supplicant_get_new_bss(wpa_s, bssid, ssid,
ssid_len);
if (bss || !try_update_scan_results)
return bss;
wpa_supplicant_update_scan_results(wpa_s, bssid);
return __wpa_supplicant_get_new_bss(wpa_s, bssid, ssid, ssid_len);
}
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;
u8 drv_ssid[SSID_MAX_LEN];
int res;
bool try_update_scan_results = true;
res = wpa_drv_get_ssid(wpa_s, drv_ssid);
if (res > 0) {
bss = _wpa_supplicant_get_new_bss(wpa_s, bssid, drv_ssid, res,
try_update_scan_results);
try_update_scan_results = false;
}
if (!bss && ssid && ssid->ssid_len > 0) {
bss = _wpa_supplicant_get_new_bss(wpa_s, bssid, ssid->ssid,
ssid->ssid_len,
try_update_scan_results);
try_update_scan_results = false;
}
if (!bss)
bss = _wpa_supplicant_get_new_bss(wpa_s, bssid, NULL, 0,
try_update_scan_results);
return bss;
}
static struct wpa_bss *
wpa_supplicant_update_current_bss(struct wpa_supplicant *wpa_s, const u8 *bssid)
{
struct wpa_bss *bss = wpa_supplicant_get_new_bss(wpa_s, bssid);
if (bss)
wpa_s->current_bss = bss;
return bss;
}
static void wpa_supplicant_update_link_bss(struct wpa_supplicant *wpa_s,
u8 link_id, const u8 *bssid)
{
struct wpa_bss *bss = wpa_supplicant_get_new_bss(wpa_s, bssid);
if (bss)
wpa_s->links[link_id].bss = bss;
}
static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
struct wpa_ssid *ssid, *old_ssid;
struct wpa_bss *bss;
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, wpa_s->bssid);
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 */
#ifdef CONFIG_OWE
if ((wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_OWE) &&
wpa_s->current_bss &&
(wpa_s->current_bss->flags & WPA_BSS_OWE_TRANSITION) &&
drv_ssid_len == wpa_s->current_bss->ssid_len &&
os_memcmp(drv_ssid, wpa_s->current_bss->ssid,
drv_ssid_len) == 0)
return 0; /* current profile still in use */
#endif /* CONFIG_OWE */
wpa_printf(MSG_DEBUG,
"Driver-initiated BSS selection changed the SSID to %s",
wpa_ssid_txt(drv_ssid, drv_ssid_len));
wpa_msg_ctrl(wpa_s, MSG_DEBUG,
"Driver-initiated BSS selection changed the SSID to %s",
wpa_ctrl_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");
bss = wpa_supplicant_update_current_bss(wpa_s, wpa_s->bssid);
if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
u8 wpa_ie[80];
size_t wpa_ie_len = sizeof(wpa_ie);
bool skip_default_rsne;
/* Do not override RSNE/RSNXE with the default values if the
* driver indicated the actual values used in the
* (Re)Association Request frame. */
skip_default_rsne = data && data->assoc_info.req_ies;
if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
wpa_ie, &wpa_ie_len,
skip_default_rsne) < 0)
wpa_dbg(wpa_s, MSG_DEBUG, "Could not set WPA suites");
} else {
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
}
if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
eapol_sm_invalidate_cached_session(wpa_s->eapol);
old_ssid = wpa_s->current_ssid;
wpa_s->current_ssid = ssid;
wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
wpa_supplicant_initiate_eapol(wpa_s);
if (old_ssid != wpa_s->current_ssid)
wpas_notify_network_changed(wpa_s);
return 0;
}
void wpa_supplicant_stop_countermeasures(void *eloop_ctx, void *sock_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->countermeasures) {
wpa_s->countermeasures = 0;
wpa_drv_set_countermeasures(wpa_s, 0);
wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
/*
* 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 wpas_reset_mlo_info(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->valid_links)
return;
wpa_s->valid_links = 0;
wpa_s->mlo_assoc_link_id = 0;
os_memset(wpa_s->ap_mld_addr, 0, ETH_ALEN);
os_memset(wpa_s->links, 0, sizeof(wpa_s->links));
}
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 || wpa_s->drv_authorized_port)
eapol_sm_notify_eap_success(wpa_s->eapol, false);
wpa_s->drv_authorized_port = 0;
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;
wpa_s->allowed_key_mgmts = 0;
#ifndef CONFIG_NO_RRM
wpas_rrm_reset(wpa_s);
#endif /* CONFIG_NO_RRM */
wpa_s->wnmsleep_used = 0;
#ifdef CONFIG_WNM
wpa_s->wnm_mode = 0;
#endif /* CONFIG_WNM */
wnm_clear_coloc_intf_reporting(wpa_s);
wpa_s->disable_mbo_oce = 0;
#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;
wpa_s->wps_scan_done = false;
wpas_reset_mlo_info(wpa_s);
#ifdef CONFIG_SME
wpa_s->sme.bss_max_idle_period = 0;
#endif /* CONFIG_SME */
wpa_s->ssid_verified = false;
wpa_s->bigtk_set = false;
}
static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s, bool authorized)
{
struct wpa_ie_data ie;
int pmksa_set = -1;
size_t i;
struct rsn_pmksa_cache_entry *cur_pmksa;
/* Start with assumption of no PMKSA cache entry match for cases other
* than SAE. In particular, this is needed to generate the PMKSA cache
* entries for Suite B cases with driver-based roaming indication. */
cur_pmksa = pmksa_cache_get_current(wpa_s->wpa);
if (cur_pmksa && !wpa_key_mgmt_sae(cur_pmksa->akmp))
pmksa_cache_clear_current(wpa_s->wpa);
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,
true);
if (pmksa_set == 0) {
eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
if (authorized)
wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
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
#ifdef CONFIG_WEP
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;
}
#endif /* CONFIG_WEP */
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 */
#ifdef CONFIG_WEP
if (has_wep_key(ssid))
privacy = 1;
#endif /* CONFIG_WEP */
#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;
#ifdef CONFIG_WEP
int wep_ok;
#endif /* CONFIG_WEP */
bool is_6ghz_bss = is_6ghz_freq(bss->freq);
ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
if (ret >= 0)
return ret;
#ifdef CONFIG_WEP
/* 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));
#endif /* CONFIG_WEP */
rsn_ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
if (is_6ghz_bss && !rsn_ie) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - 6 GHz BSS without RSNE");
return 0;
}
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 (is_6ghz_bss || !is_zero_ether_addr(bss->mld_addr)) {
/* WEP and TKIP are not allowed on 6 GHz/MLD */
ie.pairwise_cipher &= ~(WPA_CIPHER_WEP40 |
WPA_CIPHER_WEP104 |
WPA_CIPHER_TKIP);
ie.group_cipher &= ~(WPA_CIPHER_WEP40 |
WPA_CIPHER_WEP104 |
WPA_CIPHER_TKIP);
}
#ifdef CONFIG_WEP
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;
}
#endif /* CONFIG_WEP */
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 (is_6ghz_bss) {
/* MFPC must be supported on 6 GHz */
if (!(ie.capabilities & WPA_CAPABILITY_MFPC)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSNE - 6 GHz without MFPC");
break;
}
/* WPA PSK is not allowed on the 6 GHz band */
ie.key_mgmt &= ~(WPA_KEY_MGMT_PSK |
WPA_KEY_MGMT_FT_PSK |
WPA_KEY_MGMT_PSK_SHA256);
}
if (!(ie.key_mgmt & ssid->key_mgmt)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip RSN IE - key mgmt mismatch");
break;
}
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;
}
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;
}
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" selected based on RSN IE");
return 1;
}
if (is_6ghz_bss) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - 6 GHz BSS without matching RSNE");
return 0;
}
wpa_ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
if (wpas_get_ssid_pmf(wpa_s, ssid) == MGMT_FRAME_PROTECTION_REQUIRED &&
(!(ssid->key_mgmt & WPA_KEY_MGMT_OWE) || ssid->owe_only)) {
#ifdef CONFIG_OWE
if ((ssid->key_mgmt & WPA_KEY_MGMT_OWE) && ssid->owe_only &&
!wpa_ie && !rsn_ie &&
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 open 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;
}
#endif /* CONFIG_OWE */
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - MFP Required but network not MFP Capable");
return 0;
}
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;
}
#ifdef CONFIG_WEP
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;
}
#endif /* CONFIG_WEP */
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_ssid *ssid,
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 && ((rate_ie[j] & 0x7f) ==
BSS_MEMBERSHIP_SELECTOR_HE_PHY)) {
if (!he_supported(mode, IEEE80211_MODE_INFRA)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" hardware does not support HE PHY");
return 0;
}
continue;
}
if (flagged && ((rate_ie[j] & 0x7f) ==
BSS_MEMBERSHIP_SELECTOR_EHT_PHY)) {
if (!eht_supported(mode, IEEE80211_MODE_INFRA)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" hardware does not support EHT PHY");
return 0;
}
continue;
}
#ifdef CONFIG_SAE
if (flagged && ((rate_ie[j] & 0x7f) ==
BSS_MEMBERSHIP_SELECTOR_SAE_H2E_ONLY)) {
if (wpa_s->conf->sae_pwe ==
SAE_PWE_HUNT_AND_PECK &&
!ssid->sae_password_id &&
!is_6ghz_freq(bss->freq) &&
wpa_key_mgmt_sae(ssid->key_mgmt)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" SAE H2E disabled");
#ifdef CONFIG_TESTING_OPTIONS
if (wpa_s->ignore_sae_h2e_only) {
wpa_dbg(wpa_s, MSG_DEBUG,
"TESTING: Ignore SAE H2E requirement mismatch");
continue;
}
#endif /* CONFIG_TESTING_OPTIONS */
return 0;
}
continue;
}
#endif /* CONFIG_SAE */
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;
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->flags & WPA_BSS_OWE_TRANSITION)) {
struct wpa_ssid *ssid;
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if (wpas_network_disabled(wpa_s, ssid))
continue;
if (ssid->ssid_len == ssid_len &&
os_memcmp(ssid->ssid, pos, ssid_len) == 0) {
/* OWE BSS in transition mode for a currently
* enabled OWE network. */
wpa_dbg(wpa_s, MSG_DEBUG,
"OWE: transition mode OWE SSID for active OWE profile");
bss->flags |= WPA_BSS_OWE_TRANSITION;
break;
}
}
}
#endif /* CONFIG_OWE */
}
static bool wpas_valid_ml_bss(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
u16 removed_links;
if (wpa_bss_parse_basic_ml_element(wpa_s, bss, NULL, NULL, NULL, NULL))
return true;
if (!bss->valid_links)
return true;
/* Check if the current BSS is going to be removed */
removed_links = wpa_bss_parse_reconf_ml_element(wpa_s, bss);
if (BIT(bss->mld_link_id) & removed_links)
return false;
return true;
}
int disabled_freq(struct wpa_supplicant *wpa_s, int freq)
{
int i, j;
if (!wpa_s->hw.modes || !wpa_s->hw.num_modes)
return 0;
for (j = 0; j < wpa_s->hw.num_modes; j++) {
struct hostapd_hw_modes *mode = &wpa_s->hw.modes[j];
for (i = 0; i < mode->num_channels; i++) {
struct hostapd_channel_data *chan = &mode->channels[i];
if (chan->freq == freq)
return !!(chan->flag & HOSTAPD_CHAN_DISABLED);
}
}
return 1;
}
static bool wpa_scan_res_ok(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
const u8 *match_ssid, size_t match_ssid_len,
struct wpa_bss *bss, int bssid_ignore_count,
bool debug_print);
#ifdef CONFIG_SAE_PK
static bool sae_pk_acceptable_bss_with_pk(struct wpa_supplicant *wpa_s,
struct wpa_bss *orig_bss,
struct wpa_ssid *ssid,
const u8 *match_ssid,
size_t match_ssid_len)
{
struct wpa_bss *bss;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
int count;
const u8 *ie;
if (bss == orig_bss)
continue;
ie = wpa_bss_get_ie(bss, WLAN_EID_RSNX);
if (!(ieee802_11_rsnx_capab(ie, WLAN_RSNX_CAPAB_SAE_PK)))
continue;
/* TODO: Could be more thorough in checking what kind of
* signal strength or throughput estimate would be acceptable
* compared to the originally selected BSS. */
if (bss->est_throughput < 2000)
return false;
count = wpa_bssid_ignore_is_listed(wpa_s, bss->bssid);
if (wpa_scan_res_ok(wpa_s, ssid, match_ssid, match_ssid_len,
bss, count, 0))
return true;
}
return false;
}
#endif /* CONFIG_SAE_PK */
static bool wpa_scan_res_ok(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
const u8 *match_ssid, size_t match_ssid_len,
struct wpa_bss *bss, int bssid_ignore_count,
bool debug_print)
{
int res;
bool wpa, check_ssid, osen, rsn_osen = false;
struct wpa_ie_data data;
#ifdef CONFIG_MBO
const u8 *assoc_disallow;
#endif /* CONFIG_MBO */
#ifdef CONFIG_SAE
u8 rsnxe_capa = 0;
#endif /* CONFIG_SAE */
const u8 *ie;
ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
wpa = ie && ie[1];
ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
wpa |= ie && ie[1];
if (ie && wpa_parse_wpa_ie_rsn(ie, 2 + ie[1], &data) == 0 &&
(data.key_mgmt & WPA_KEY_MGMT_OSEN))
rsn_osen = true;
ie = wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE);
osen = ie != NULL;
#ifdef CONFIG_SAE
ie = wpa_bss_get_ie(bss, WLAN_EID_RSNX);
if (ie && ie[1] >= 1)
rsnxe_capa = ie[2];
#endif /* CONFIG_SAE */
check_ssid = wpa || ssid->ssid_len > 0;
if (wpas_network_disabled(wpa_s, ssid)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled");
return false;
}
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);
return false;
}
#ifdef CONFIG_WPS
if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && bssid_ignore_count) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - BSSID ignored (WPS)");
return false;
}
if (wpa && ssid->ssid_len == 0 &&
wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
check_ssid = false;
if (!wpa && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
/* Only allow wildcard SSID match if an AP advertises active
* WPS operation that matches our mode. */
check_ssid = ssid->ssid_len > 0 ||
!wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss);
}
#endif /* CONFIG_WPS */
if (ssid->bssid_set && ssid->ssid_len == 0 &&
ether_addr_equal(bss->bssid, ssid->bssid))
check_ssid = false;
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");
return false;
}
if (ssid->bssid_set &&
!ether_addr_equal(bss->bssid, ssid->bssid)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID mismatch");
return false;
}
/* check the list of BSSIDs to ignore */
if (ssid->num_bssid_ignore &&
addr_in_list(bss->bssid, ssid->bssid_ignore,
ssid->num_bssid_ignore)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - BSSID configured to be ignored");
return false;
}
/* if there is a list of accepted BSSIDs, only accept those APs */
if (ssid->num_bssid_accept &&
!addr_in_list(bss->bssid, ssid->bssid_accept,
ssid->num_bssid_accept)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - BSSID not in list of accepted values");
return false;
}
if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss, debug_print))
return false;
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");
return false;
}
#ifdef CONFIG_WEP
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");
return false;
}
#endif /* CONFIG_WEP */
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");
return false;
}
if (!wpa_supplicant_match_privacy(bss, ssid)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - privacy mismatch");
return false;
}
if (ssid->mode != WPAS_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");
return false;
}
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));
return false;
}
if (!freq_allowed(ssid->freq_list, bss->freq)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - frequency not allowed");
return false;
}
#ifdef CONFIG_MESH
if (ssid->mode == WPAS_MODE_MESH && ssid->frequency > 0 &&
ssid->frequency != bss->freq) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - frequency not allowed (mesh)");
return false;
}
#endif /* CONFIG_MESH */
if (!rate_match(wpa_s, ssid, bss, debug_print)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - rate sets do not match");
return false;
}
#ifdef CONFIG_SAE
/* When using SAE Password Identifier and when operationg on the 6 GHz
* band, only H2E is allowed. */
if ((wpa_s->conf->sae_pwe == SAE_PWE_HASH_TO_ELEMENT ||
is_6ghz_freq(bss->freq) || ssid->sae_password_id) &&
wpa_s->conf->sae_pwe != SAE_PWE_FORCE_HUNT_AND_PECK &&
wpa_key_mgmt_sae(ssid->key_mgmt) &&
!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_H2E))) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - SAE H2E required, but not supported by the AP");
return false;
}
#endif /* CONFIG_SAE */
#ifdef CONFIG_SAE_PK
if (ssid->sae_pk == SAE_PK_MODE_ONLY &&
!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_PK))) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - SAE-PK required, but not supported by the AP");
return false;
}
#endif /* CONFIG_SAE_PK */
#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");
return false;
}
#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");
return false;
}
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) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - no P2P element");
return false;
}
p2p_ie = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
if (!p2p_ie) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - could not fetch P2P element");
return false;
}
if (p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr) < 0 ||
!ether_addr_equal(dev_addr, ssid->go_p2p_dev_addr)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - no matching GO P2P Device Address in P2P element");
wpabuf_free(p2p_ie);
return false;
}
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);
return false;
}
#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_check_assoc_disallow(bss);
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]);
return false;
}
if (wpa_is_bss_tmp_disallowed(wpa_s, bss)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - AP temporarily disallowed");
return false;
}
#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, wpa_s->own_addr,
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");
return false;
}
#endif /* CONFIG_DPP */
#ifdef CONFIG_SAE_PK
if (ssid->sae_pk == SAE_PK_MODE_AUTOMATIC &&
wpa_key_mgmt_sae(ssid->key_mgmt) &&
((ssid->sae_password &&
sae_pk_valid_password(ssid->sae_password)) ||
(!ssid->sae_password && ssid->passphrase &&
sae_pk_valid_password(ssid->passphrase))) &&
!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_PK)) &&
sae_pk_acceptable_bss_with_pk(wpa_s, bss, ssid, match_ssid,
match_ssid_len)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - another acceptable BSS with SAE-PK in the same ESS");
return false;
}
#endif /* CONFIG_SAE_PK */
if (bss->ssid_len == 0) {
#ifdef CONFIG_OWE
const u8 *owe_ssid = NULL;
size_t owe_ssid_len = 0;
owe_trans_ssid(wpa_s, bss, &owe_ssid, &owe_ssid_len);
if (owe_ssid && owe_ssid_len &&
owe_ssid_len == ssid->ssid_len &&
os_memcmp(owe_ssid, ssid->ssid, owe_ssid_len) == 0) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - no SSID in BSS entry for a possible OWE transition mode BSS");
int_array_add_unique(&wpa_s->owe_trans_scan_freq,
bss->freq);
return false;
}
#endif /* CONFIG_OWE */
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - no SSID known for the BSS");
return false;
}
if (!wpas_valid_ml_bss(wpa_s, bss)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - ML BSS going to be removed");
return false;
}
/* Matching configuration found */
return true;
}
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;
const u8 *ie;
struct wpa_ssid *ssid;
int osen;
const u8 *match_ssid;
size_t match_ssid_len;
int bssid_ignore_count;
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;
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" : "");
}
bssid_ignore_count = wpa_bssid_ignore_is_listed(wpa_s, bss->bssid);
if (bssid_ignore_count) {
int limit = 1;
if (wpa_supplicant_enabled_networks(wpa_s) == 1) {
/*
* When only a single network is enabled, we can
* trigger BSSID ignoring 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 (bssid_ignore_count > limit) {
if (debug_print) {
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - BSSID ignored (count=%d limit=%d)",
bssid_ignore_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;
}
if (disabled_freq(wpa_s, bss->freq)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - channel disabled");
return NULL;
}
if (wnm_is_bss_excluded(wpa_s, bss)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID excluded");
return NULL;
}
for (ssid = group; ssid; ssid = only_first_ssid ? NULL : ssid->pnext) {
if (wpa_scan_res_ok(wpa_s, ssid, match_ssid, match_ssid_len,
bss, bssid_ignore_count, debug_print))
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 %sBSS " MACSTR
" ssid='%s'",
bss == wpa_s->current_bss ? "current ": "",
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;
size_t 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 &&
(wpa_s->bssid_ignore || wnm_active_bss_trans_mgmt(wpa_s)) &&
!wpa_s->countermeasures) {
wpa_dbg(wpa_s, MSG_DEBUG,
"No APs found - clear BSSID ignore list and try again");
wnm_btm_reset(wpa_s);
wpa_bssid_ignore_clear(wpa_s);
wpa_s->bssid_ignore_cleared = true;
} 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);
}
static bool ml_link_probe_scan(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->ml_connect_probe_ssid || !wpa_s->ml_connect_probe_bss)
return false;
wpa_msg(wpa_s, MSG_DEBUG,
"Request association with " MACSTR " after ML probe",
MAC2STR(wpa_s->ml_connect_probe_bss->bssid));
wpa_supplicant_associate(wpa_s, wpa_s->ml_connect_probe_bss,
wpa_s->ml_connect_probe_ssid);
wpa_s->ml_connect_probe_ssid = NULL;
wpa_s->ml_connect_probe_bss = NULL;
return true;
}
static int wpa_supplicant_connect_ml_missing(struct wpa_supplicant *wpa_s,
struct wpa_bss *selected,
struct wpa_ssid *ssid)
{
int *freqs;
u16 missing_links = 0, removed_links;
u8 ap_mld_id;
if (!((wpa_s->drv_flags2 & WPA_DRIVER_FLAGS2_MLO) &&
(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)))
return 0;
if (wpa_bss_parse_basic_ml_element(wpa_s, selected, NULL,
&missing_links, ssid,
&ap_mld_id) ||
!missing_links)
return 0;
removed_links = wpa_bss_parse_reconf_ml_element(wpa_s, selected);
missing_links &= ~removed_links;
if (!missing_links)
return 0;
wpa_dbg(wpa_s, MSG_DEBUG,
"MLD: Doing an ML probe for missing links 0x%04x",
missing_links);
freqs = os_malloc(sizeof(int) * 2);
if (!freqs)
return 0;
wpa_s->ml_connect_probe_ssid = ssid;
wpa_s->ml_connect_probe_bss = selected;
freqs[0] = selected->freq;
freqs[1] = 0;
wpa_s->manual_scan_passive = 0;
wpa_s->manual_scan_use_id = 0;
wpa_s->manual_scan_only_new = 0;
wpa_s->scan_id_count = 0;
os_free(wpa_s->manual_scan_freqs);
wpa_s->manual_scan_freqs = freqs;
os_memcpy(wpa_s->ml_probe_bssid, selected->bssid, ETH_ALEN);
/*
* In case the ML probe request is intended to retrieve information from
* the transmitted BSS, the AP MLD ID should be included and should be
* set to zero.
* In case the ML probe requested is intended to retrieve information
* from a non-transmitted BSS, the AP MLD ID should not be included.
*/
if (ap_mld_id)
wpa_s->ml_probe_mld_id = -1;
else
wpa_s->ml_probe_mld_id = 0;
if (ssid && ssid->ssid_len) {
os_free(wpa_s->ssids_from_scan_req);
wpa_s->num_ssids_from_scan_req = 0;
wpa_s->ssids_from_scan_req =
os_zalloc(sizeof(struct wpa_ssid_value));
if (wpa_s->ssids_from_scan_req) {
wpa_printf(MSG_DEBUG,
"MLD: ML probe: With direct SSID");
wpa_s->num_ssids_from_scan_req = 1;
wpa_s->ssids_from_scan_req[0].ssid_len = ssid->ssid_len;
os_memcpy(wpa_s->ssids_from_scan_req[0].ssid,
ssid->ssid, ssid->ssid_len);
}
}
wpa_s->ml_probe_links = missing_links;
wpa_s->normal_scans = 0;
wpa_s->scan_req = MANUAL_SCAN_REQ;
wpa_s->after_wps = 0;
wpa_s->known_wps_freq = 0;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 1;
}
int wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
struct wpa_bss *selected,
struct wpa_ssid *ssid)
{
#ifdef IEEE8021X_EAPOL
if ((eap_is_wps_pbc_enrollee(&ssid->eap) &&
wpas_wps_partner_link_overlap_detect(wpa_s)) ||
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);
wpa_s->wps_overlap = true;
#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;
}
#endif /* IEEE8021X_EAPOL */
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 ||
(!ether_addr_equal(selected->bssid, wpa_s->bssid) &&
((wpa_s->wpa_state != WPA_ASSOCIATING &&
wpa_s->wpa_state != WPA_AUTHENTICATING) ||
(!is_zero_ether_addr(wpa_s->pending_bssid) &&
!ether_addr_equal(selected->bssid, wpa_s->pending_bssid)) ||
(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;
}
if (wpa_supplicant_connect_ml_missing(wpa_s, selected, ssid))
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)
{
size_t 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_printf(MSG_INFO,
"IBSS RSN not supported in the build - cannot use the profile for SSID '%s'",
wpa_ssid_txt(ssid->ssid,
ssid->ssid_len));
wpa_msg_ctrl(wpa_s, MSG_INFO,
"IBSS RSN not supported in the build - cannot use the profile for SSID '%s'",
wpa_ctrl_ssid_txt(ssid->ssid,
ssid->ssid_len));
continue;
}
#endif /* !CONFIG_IBSS_RSN */
if (ssid->mode == WPAS_MODE_IBSS ||
ssid->mode == WPAS_MODE_AP ||
ssid->mode == WPAS_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);
}
}
#ifndef CONFIG_NO_ROAMING
static int wpas_get_snr_signal_info(u32 frequency, int avg_signal, int noise)
{
if (noise == WPA_INVALID_NOISE) {
if (IS_5GHZ(frequency)) {
noise = DEFAULT_NOISE_FLOOR_5GHZ;
} else if (is_6ghz_freq(frequency)) {
noise = DEFAULT_NOISE_FLOOR_6GHZ;
} else {
noise = DEFAULT_NOISE_FLOOR_2GHZ;
}
}
return avg_signal - noise;
}
static unsigned int
wpas_get_est_throughput_from_bss_snr(const struct wpa_supplicant *wpa_s,
const struct wpa_bss *bss, int snr)
{
int rate = wpa_bss_get_max_rate(bss);
const u8 *ies = wpa_bss_ie_ptr(bss);
size_t ie_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
enum chan_width max_cw = CHAN_WIDTH_UNKNOWN;
return wpas_get_est_tpt(wpa_s, ies, ie_len, rate, snr, bss->freq,
&max_cw);
}
static int wpas_evaluate_band_score(int frequency)
{
if (is_6ghz_freq(frequency))
return 2;
if (IS_5GHZ(frequency))
return 1;
return 0;
}
#ifndef CHROMIUM
int wpa_supplicant_need_to_roam_within_ess(struct wpa_supplicant *wpa_s,
struct wpa_bss *current_bss,
struct wpa_bss *selected)
{
int min_diff, diff;
int cur_band_score, sel_band_score;
int to_5ghz, to_6ghz;
int cur_level, sel_level;
unsigned int cur_est, sel_est;
struct wpa_signal_info si;
int cur_snr = 0;
int ret = 0;
const u8 *cur_ies = wpa_bss_ie_ptr(current_bss);
const u8 *sel_ies = wpa_bss_ie_ptr(selected);
size_t cur_ie_len = current_bss->ie_len ? current_bss->ie_len :
current_bss->beacon_ie_len;
size_t sel_ie_len = selected->ie_len ? selected->ie_len :
selected->beacon_ie_len;
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 (wpas_ap_link_address(wpa_s, selected->bssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, "MLD: associated to selected BSS");
return 0;
}
if (wpa_s->current_ssid->bssid_set &&
ether_addr_equal(selected->bssid, wpa_s->current_ssid->bssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Allow reassociation - selected BSS "
"has preferred BSSID");
return 1;
}
/*
* Try to poll the signal from the driver since this will allow to get
* more accurate values. In some cases, there can be big differences
* between the RSSI of the Probe Response frames of the AP we are
* associated with and the Beacon frames we hear from the same AP after
* association. This can happen, e.g., when there are two antennas that
* hear the AP very differently. If the driver chooses to hear the
* Probe Response frames during the scan on the "bad" antenna because
* it wants to save power, but knows to choose the other antenna after
* association, we will hear our AP with a low RSSI as part of the
* scan even when we can hear it decently on the other antenna. To cope
* with this, ask the driver to teach us how it hears the AP. Also, the
* scan results may be a bit old, since we can very quickly get fresh
* information about our currently associated AP.
*/
if (wpa_drv_signal_poll(wpa_s, &si) == 0 &&
(si.data.avg_beacon_signal || si.data.avg_signal)) {
/*
* Normalize avg_signal to the RSSI over 20 MHz, as the
* throughput is estimated based on the RSSI over 20 MHz
*/
cur_level = si.data.avg_beacon_signal ?
si.data.avg_beacon_signal :
(si.data.avg_signal -
wpas_channel_width_rssi_bump(cur_ies, cur_ie_len,
si.chanwidth));
cur_snr = wpas_get_snr_signal_info(si.frequency, cur_level,
si.current_noise);
cur_est = wpas_get_est_throughput_from_bss_snr(wpa_s,
current_bss,
cur_snr);
wpa_dbg(wpa_s, MSG_DEBUG,
"Using signal poll values for the current BSS: level=%d snr=%d est_throughput=%u",
cur_level, cur_snr, cur_est);
} else {
/* Level and SNR are measured over 20 MHz channel */
cur_level = current_bss->level;
cur_snr = current_bss->snr;
cur_est = current_bss->est_throughput;
}
/* Adjust the SNR of BSSes based on the channel width. */
cur_level += wpas_channel_width_rssi_bump(cur_ies, cur_ie_len,
current_bss->max_cw);
cur_snr = wpas_adjust_snr_by_chanwidth(cur_ies, cur_ie_len,
current_bss->max_cw, cur_snr);
sel_est = selected->est_throughput;
sel_level = selected->level +
wpas_channel_width_rssi_bump(sel_ies, sel_ie_len,
selected->max_cw);
if (sel_est > cur_est + 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;
to_6ghz = is_6ghz_freq(selected->freq) &&
!is_6ghz_freq(current_bss->freq);
if (cur_level < 0 &&
cur_level > sel_level + to_5ghz * 2 + to_6ghz * 2 &&
sel_est < cur_est * 1.2) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - Current BSS has better "
"signal level");
return 0;
}
if (cur_est > sel_est + 5000) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Skip roam - Current BSS has better estimated throughput");
return 0;
}
if (cur_snr > GREAT_SNR) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Skip roam - Current BSS has good SNR (%u > %u)",
cur_snr, GREAT_SNR);
return 0;
}
if (cur_level < -85) /* ..-86 dBm */
min_diff = 1;
else if (cur_level < -80) /* -85..-81 dBm */
min_diff = 2;
else if (cur_level < -75) /* -80..-76 dBm */
min_diff = 3;
else if (cur_level < -70) /* -75..-71 dBm */
min_diff = 4;
else if (cur_level < 0) /* -70..-1 dBm */
min_diff = 5;
else /* unspecified units (not in dBm) */
min_diff = 2;
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++;
else if (sel_est > cur_est * 1.5)
min_diff -= 10;
else if (sel_est > cur_est * 1.2)
min_diff -= 5;
else if (sel_est > cur_est * 1.1)
min_diff -= 2;
else if (sel_est > cur_est)
min_diff--;
cur_band_score = wpas_evaluate_band_score(current_bss->freq);
sel_band_score = wpas_evaluate_band_score(selected->freq);
min_diff += (cur_band_score - sel_band_score) * 2;
if (wpa_s->signal_threshold && cur_level <= wpa_s->signal_threshold &&
sel_level > wpa_s->signal_threshold)
min_diff -= 2;
diff = sel_level - cur_level;
if (diff < min_diff) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Skip roam - too small difference in signal level (%d < %d)",
diff, min_diff);
ret = 0;
} else {
wpa_dbg(wpa_s, MSG_DEBUG,
"Allow reassociation due to difference in signal level (%d >= %d)",
diff, min_diff);
ret = 1;
}
wpa_msg_ctrl(wpa_s, MSG_INFO, "%scur_bssid=" MACSTR
" cur_freq=%d cur_level=%d cur_est=%d sel_bssid=" MACSTR
" sel_freq=%d sel_level=%d sel_est=%d",
ret ? WPA_EVENT_DO_ROAM : WPA_EVENT_SKIP_ROAM,
MAC2STR(current_bss->bssid),
current_bss->freq, cur_level, cur_est,
MAC2STR(selected->bssid),
selected->freq, sel_level, sel_est);
return ret;
}
#else /* CHROMIUM */
int wpa_supplicant_need_to_roam_within_ess(struct wpa_supplicant *wpa_s,
struct wpa_bss *current_bss,
struct wpa_bss *selected)
{
/*
* These constants are used to perform calculations to determine
* min_diff, the minimum RSSI difference needed to roam, and
* adjust_factor, the estimated throughput weight, based on the RSSI of
* the current AP.
*
* Currently min_diff and adjust_factor are bounded as follows:
* 4 <= min_diff <= 15, before applying 5GHz and bgscan threshold biases
* 0 <= adjust_factor <= 2.75
*/
const int low_rssi = -85, high_rssi = -30;
const int rssi_bucket_size = 5;
const int min_diff_offset = 21, default_min_diff = 5;
const double adjust_factor_offset = 17, default_adjust_factor = 4;
const double adjust_factor_step = 0.25;
const double max_est_ratio = 2;
int min_diff, diff;
int cur_band_score, sel_band_score;
int cur_level, sel_level, temp_level;
int adjust = 0;
double adjust_factor, est_ratio;
unsigned int cur_est, sel_est;
struct wpa_signal_info si;
int cur_snr = 0, sel_snr = 0;
int ret = 0;
const u8 *cur_ies = wpa_bss_ie_ptr(current_bss);
const u8 *sel_ies = wpa_bss_ie_ptr(selected);
size_t cur_ie_len = current_bss->ie_len ? current_bss->ie_len :
current_bss->beacon_ie_len;
size_t sel_ie_len = selected->ie_len ? selected->ie_len :
selected->beacon_ie_len;
wpa_dbg(wpa_s, MSG_INFO, "Considering within-ESS reassociation");
wpa_dbg(wpa_s, MSG_INFO, "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_INFO, "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 (wpas_ap_link_address(wpa_s, selected->bssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, "MLD: associated to selected BSS");
return 0;
}
if (wpa_s->current_ssid->bssid_set &&
os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) ==
0) {
wpa_dbg(wpa_s, MSG_INFO, "Allow reassociation - selected BSS "
"has preferred BSSID");
return 1;
}
/*
* Try to poll the signal from the driver since this will allow to get
* more accurate values. In some cases, there can be big differences
* between the RSSI of the Probe Response frames of the AP we are
* associated with and the Beacon frames we hear from the same AP after
* association. This can happen, e.g., when there are two antennas that
* hear the AP very differently. If the driver chooses to hear the
* Probe Response frames during the scan on the "bad" antenna because
* it wants to save power, but knows to choose the other antenna after
* association, we will hear our AP with a low RSSI as part of the
* scan even when we can hear it decently on the other antenna. To cope
* with this, ask the driver to teach us how it hears the AP. Also, the
* scan results may be a bit old, since we can very quickly get fresh
* information about our currently associated AP.
*/
if (wpa_drv_signal_poll(wpa_s, &si) == 0 &&
(si.data.avg_beacon_signal || si.data.avg_signal)) {
/*
* Normalize avg_signal to the RSSI over 20 MHz, as the
* throughput is estimated based on the RSSI over 20 MHz
*/
cur_level = si.data.avg_beacon_signal ?
si.data.avg_beacon_signal :
(si.data.avg_signal -
wpas_channel_width_rssi_bump(cur_ies, cur_ie_len,
si.chanwidth));
cur_snr = wpas_get_snr_signal_info(si.frequency, cur_level,
si.current_noise);
cur_est = wpas_get_est_throughput_from_bss_snr(wpa_s,
current_bss,
cur_snr);
wpa_dbg(wpa_s, MSG_INFO,
"Using signal poll values for the current BSS: level=%d snr=%d est_throughput=%u",
cur_level, cur_snr, cur_est);
} else {
/* Level and SNR are measured over 20 MHz channel */
cur_level = current_bss->level;
cur_snr = current_bss->snr;
cur_est = current_bss->est_throughput;
}
/* Adjust the SNR of BSSes based on the channel width. */
cur_level += wpas_channel_width_rssi_bump(cur_ies, cur_ie_len,
current_bss->max_cw);
cur_snr = wpas_adjust_snr_by_chanwidth(cur_ies, cur_ie_len,
current_bss->max_cw, cur_snr);
sel_est = selected->est_throughput;
sel_level = selected->level +
wpas_channel_width_rssi_bump(sel_ies, sel_ie_len,
selected->max_cw);
sel_snr = wpas_adjust_snr_by_chanwidth(sel_ies, sel_ie_len,
selected->max_cw, selected->snr);
/*
* Short-circuit the roaming heuristic to bias toward association on
* 6GHz. Apply a 3dBm "roaming difficulty" so that natural RSSI
* fluctuation don't cause ping-ponging between 6GHz and non-6GHz BSSes.
*/
if (is_6ghz_freq(current_bss->freq) && !is_6ghz_freq(selected->freq)) {
if (cur_snr >= GREAT_SNR - 3) {
wpa_dbg(wpa_s, MSG_INFO, "Skip roam - bias toward 6GHz");
return 0;
}
} else if (is_6ghz_freq(selected->freq) &&
!is_6ghz_freq(current_bss->freq)) {
if (sel_snr >= GREAT_SNR + 3) {
wpa_dbg(wpa_s, MSG_INFO, "Allow roam - bias toward 6GHz");
return 1;
}
}
/*
* At low RSSI, we ignore estimated throughput gains and only consider
* RSSI gains. At higher RSSI, adjust_factor is multiplied by adjust
* (set below according to the selected AP's estimated throughput
* relative to the current AP's estimated throughput) to influence the
* min_diff.
*/
if (cur_level < 0) {
temp_level = cur_level;
if (temp_level < low_rssi)
temp_level = low_rssi;
else if (temp_level > high_rssi)
temp_level = high_rssi;
min_diff = min_diff_offset + temp_level / rssi_bucket_size;
adjust_factor = adjust_factor_offset +
temp_level / rssi_bucket_size;
} else { /* unspecified units (not in dBm) */
min_diff = default_min_diff;
adjust_factor = default_adjust_factor;
}
adjust_factor *= adjust_factor_step;
if (cur_est > sel_est) {
adjust = 1;
est_ratio = sel_est == 0 ? max_est_ratio :
(double) cur_est / sel_est;
} else {
adjust = -1;
est_ratio = cur_est == 0 ? max_est_ratio :
(double) sel_est / cur_est;
}
if (est_ratio > max_est_ratio)
est_ratio = max_est_ratio;
adjust *= (est_ratio - 1) * 10;
min_diff += (int) (adjust * adjust_factor);
/*
* Networks of higher bands usually have lower traffic load and therefore
* often provide higher throughput even for identical estimated throughputs.
* We give scores 0, 1, and 2 to 2.4GHz, 5GHz and 6GHz bands respectively,
* so that min_diff is smaller and it is easier to roam to networks of
* higher bands.
*/
cur_band_score = wpas_evaluate_band_score(current_bss->freq);
sel_band_score = wpas_evaluate_band_score(selected->freq);
min_diff += (cur_band_score - sel_band_score) * 2;
if (wpa_s->signal_threshold && cur_level <= wpa_s->signal_threshold &&
sel_level > wpa_s->signal_threshold)
min_diff -= 2;
diff = sel_level - cur_level;
if (diff < min_diff) {
wpa_dbg(wpa_s, MSG_INFO,
"Skip roam - too small difference in signal level (%d < %d)",
diff, min_diff);
ret = 0;
} else {
wpa_dbg(wpa_s, MSG_INFO,
"Allow reassociation due to difference in signal level (%d >= %d)",
diff, min_diff);
ret = 1;
}
wpa_msg_ctrl(wpa_s, MSG_INFO, "%scur_bssid=" MACSTR
" cur_freq=%d cur_level=%d cur_est=%d sel_bssid=" MACSTR
" sel_freq=%d sel_level=%d sel_est=%d",
ret ? WPA_EVENT_DO_ROAM : WPA_EVENT_SKIP_ROAM,
MAC2STR(current_bss->bssid),
current_bss->freq, cur_level, cur_est,
MAC2STR(selected->bssid),
selected->freq, sel_level, sel_est);
return ret;
}
#endif /* CHROMIUM */
#endif /* CONFIG_NO_ROAMING */
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;
const u8 *bssid;
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->valid_links)
bssid = wpa_s->links[wpa_s->mlo_assoc_link_id].bssid;
else
bssid = wpa_s->bssid;
if (wpa_s->current_ssid->ssid)
current_bss = wpa_bss_get(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, 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
return wpa_supplicant_need_to_roam_within_ess(wpa_s, current_bss,
selected);
#else /* CONFIG_NO_ROAMING */
return 0;
#endif /* CONFIG_NO_ROAMING */
}
static int wpas_trigger_6ghz_scan(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
struct wpa_driver_scan_params params;
unsigned int j;
wpa_dbg(wpa_s, MSG_INFO, "Triggering 6GHz-only scan");
os_memset(&params, 0, sizeof(params));
params.non_coloc_6ghz = wpa_s->last_scan_non_coloc_6ghz;
for (j = 0; j < data->scan_info.num_ssids; j++)
params.ssids[j] = data->scan_info.ssids[j];
params.num_ssids = data->scan_info.num_ssids;
wpa_add_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, &params,
true, false, false);
if (!wpa_supplicant_trigger_scan(wpa_s, &params, true, true)) {
wpa_s->scan_in_progress_6ghz = true;
wpas_notify_scan_in_progress_6ghz(wpa_s);
os_free(params.freqs);
return 1;
}
wpa_dbg(wpa_s, MSG_INFO, "Failed to trigger 6GHz-only scan");
os_free(params.freqs);
return 0;
}
static bool wpas_short_ssid_match(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
size_t i;
u32 current_ssid_short = ieee80211_crc32(wpa_s->current_ssid->ssid,
wpa_s->current_ssid->ssid_len);
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *res = scan_res->res[i];
const u8 *rnr_ie, *ie_end;
const struct ieee80211_neighbor_ap_info *info;
size_t left;
rnr_ie = wpa_scan_get_ie(res, WLAN_EID_REDUCED_NEIGHBOR_REPORT);
if (!rnr_ie)
continue;
ie_end = rnr_ie + 2 + rnr_ie[1];
rnr_ie += 2;
info = (const struct ieee80211_neighbor_ap_info *) rnr_ie;
if (info->tbtt_info_len < 11)
continue;
left = ie_end - rnr_ie;
if (left < sizeof(struct ieee80211_neighbor_ap_info))
continue;
left -= sizeof(struct ieee80211_neighbor_ap_info);
if (left < info->tbtt_info_len)
continue;
rnr_ie += sizeof(struct ieee80211_neighbor_ap_info);
while (rnr_ie + 11 <= ie_end) {
/* skip TBTT offset and BSSID */
u32 short_ssid = WPA_GET_LE32(rnr_ie + 1 + ETH_ALEN);
if (short_ssid == current_ssid_short)
return true;
rnr_ie += info->tbtt_info_len;
}
}
return false;
}
/*
* 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;
bool trigger_6ghz_scan;
bool short_ssid_match_found = false;
#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 */
trigger_6ghz_scan = wpa_s->crossed_6ghz_dom &&
wpa_s->last_scan_all_chan;
wpa_s->crossed_6ghz_dom = false;
wpa_s->last_scan_all_chan = false;
wpa_supplicant_notify_scanning(wpa_s, 0);
scan_res = wpa_supplicant_get_scan_results(wpa_s,
data ? &data->scan_info :
NULL, 1, NULL);
if (wpa_s->scan_in_progress_6ghz) {
wpa_s->scan_in_progress_6ghz = false;
wpas_notify_scan_in_progress_6ghz(wpa_s);
}
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;
if (wpa_s->scan_res_fail_handler) {
void (*handler)(struct wpa_supplicant *wpa_s);
handler = wpa_s->scan_res_fail_handler;
wpa_s->scan_res_fail_handler = NULL;
handler(wpa_s);
} else {
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 */
wpa_s->last_scan_external = data && data->scan_info.external_scan;
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;
}
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 (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;
}
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, false) > 0)
goto scan_work_done;
if (sme_proc_obss_scan(wpa_s) > 0)
goto scan_work_done;
#ifndef CONFIG_NO_RRM
if (own_request && data &&
wpas_beacon_rep_scan_process(wpa_s, scan_res, &data->scan_info) > 0)
goto scan_work_done;
#endif /* CONFIG_NO_RRM */
if (ml_link_probe_scan(wpa_s))
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;
if (wpa_s->current_ssid && trigger_6ghz_scan && own_request && data &&
wpas_short_ssid_match(wpa_s, scan_res)) {
wpa_dbg(wpa_s, MSG_INFO, "Short SSID match in scan results");
short_ssid_match_found = true;
}
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);
}
os_free(wpa_s->last_scan_freqs);
wpa_s->last_scan_freqs = NULL;
wpa_s->num_last_scan_freqs = 0;
if (own_request && data &&
data->scan_info.freqs && data->scan_info.num_freqs) {
wpa_s->last_scan_freqs = os_malloc(sizeof(int) *
data->scan_info.num_freqs);
if (wpa_s->last_scan_freqs) {
os_memcpy(wpa_s->last_scan_freqs,
data->scan_info.freqs,
sizeof(int) * data->scan_info.num_freqs);
wpa_s->num_last_scan_freqs = data->scan_info.num_freqs;
}
}
if (wpa_s->supp_pbc_active && !wpas_wps_partner_link_scan_done(wpa_s))
return ret;
if (short_ssid_match_found && wpas_trigger_6ghz_scan(wpa_s, data) > 0)
return 1;
return wpas_select_network_from_last_scan(wpa_s, 1, own_request,
trigger_6ghz_scan, data);
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;
}
/**
* Select a network from the last scan
* @wpa_s: Pointer to wpa_supplicant data
* @new_scan: Whether this function was called right after a scan has finished
* @own_request: Whether the scan was requested by this interface
* @trigger_6ghz_scan: Whether to trigger a 6ghz-only scan when applicable
* @data: Scan data from scan that finished if applicable
*
* See _wpa_supplicant_event_scan_results() for return values.
*/
static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s,
int new_scan, int own_request,
bool trigger_6ghz_scan,
union wpa_event_data *data)
{
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;
#ifdef CONFIG_OWE
os_free(wpa_s->owe_trans_scan_freq);
wpa_s->owe_trans_scan_freq = NULL;
#endif /* CONFIG_OWE */
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;
}
wpa_s->suitable_network++;
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;
}
wpa_s->supp_pbc_active = false;
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_s->no_suitable_network++;
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