hostap/wpa_supplicant/wps_supplicant.c

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/*
* wpa_supplicant / WPS integration
* Copyright (c) 2008, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "ieee802_11_defs.h"
#include "wpa_common.h"
#include "config.h"
#include "eap_peer/eap.h"
#include "wpa_supplicant_i.h"
#include "eloop.h"
#include "uuid.h"
#include "wpa_ctrl.h"
#include "ctrl_iface_dbus.h"
#include "eap_common/eap_wsc_common.h"
#include "blacklist.h"
#include "wps_supplicant.h"
#include "dh_groups.h"
#define WPS_PIN_SCAN_IGNORE_SEL_REG 3
static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->wps_success &&
wpa_s->current_ssid &&
eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
const u8 *bssid = wpa_s->bssid;
if (is_zero_ether_addr(bssid))
bssid = wpa_s->pending_bssid;
wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
" did not succeed - continue trying to find "
"suitable AP", MAC2STR(bssid));
wpa_blacklist_add(wpa_s, bssid);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s,
wpa_s->blacklist_cleared ? 5 : 0, 0);
wpa_s->blacklist_cleared = 0;
return 1;
}
eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
!(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
"try to associate with the received credential");
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 1;
}
if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
"for external credential processing");
wpas_clear_wps(wpa_s);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
return 1;
}
return 0;
}
static int wpa_supplicant_wps_cred(void *ctx,
const struct wps_credential *cred)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *ssid = wpa_s->current_ssid;
u8 key_idx = 0;
if ((wpa_s->conf->wps_cred_processing == 1 ||
wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) {
size_t blen = cred->cred_attr_len * 2 + 1;
char *buf = os_malloc(blen);
if (buf) {
wpa_snprintf_hex(buf, blen,
cred->cred_attr, cred->cred_attr_len);
wpa_msg(wpa_s, MSG_INFO, "%s%s",
WPS_EVENT_CRED_RECEIVED, buf);
os_free(buf);
}
wpa_supplicant_dbus_notify_wps_cred(wpa_s, cred);
} else
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
cred->cred_attr, cred->cred_attr_len);
if (wpa_s->conf->wps_cred_processing == 1)
return 0;
if (cred->auth_type != WPS_AUTH_OPEN &&
cred->auth_type != WPS_AUTH_SHARED &&
cred->auth_type != WPS_AUTH_WPAPSK &&
cred->auth_type != WPS_AUTH_WPA2PSK) {
wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
"unsupported authentication type %d",
cred->auth_type);
return 0;
}
if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
"on the received credential");
os_free(ssid->eap.identity);
ssid->eap.identity = NULL;
ssid->eap.identity_len = 0;
os_free(ssid->eap.phase1);
ssid->eap.phase1 = NULL;
os_free(ssid->eap.eap_methods);
ssid->eap.eap_methods = NULL;
} else {
wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
"received credential");
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return -1;
}
wpa_config_set_network_defaults(ssid);
os_free(ssid->ssid);
ssid->ssid = os_malloc(cred->ssid_len);
if (ssid->ssid) {
os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
ssid->ssid_len = cred->ssid_len;
}
switch (cred->encr_type) {
case WPS_ENCR_NONE:
break;
case WPS_ENCR_WEP:
if (cred->key_len <= 0)
break;
if (cred->key_len != 5 && cred->key_len != 13 &&
cred->key_len != 10 && cred->key_len != 26) {
wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
"%lu", (unsigned long) cred->key_len);
return -1;
}
if (cred->key_idx > NUM_WEP_KEYS) {
wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
cred->key_idx);
return -1;
}
if (cred->key_idx)
key_idx = cred->key_idx - 1;
if (cred->key_len == 10 || cred->key_len == 26) {
if (hexstr2bin((char *) cred->key,
ssid->wep_key[key_idx],
cred->key_len / 2) < 0) {
wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
"%d", key_idx);
return -1;
}
ssid->wep_key_len[key_idx] = cred->key_len / 2;
} else {
os_memcpy(ssid->wep_key[key_idx], cred->key,
cred->key_len);
ssid->wep_key_len[key_idx] = cred->key_len;
}
ssid->wep_tx_keyidx = key_idx;
break;
case WPS_ENCR_TKIP:
ssid->pairwise_cipher = WPA_CIPHER_TKIP;
break;
case WPS_ENCR_AES:
ssid->pairwise_cipher = WPA_CIPHER_CCMP;
break;
}
switch (cred->auth_type) {
case WPS_AUTH_OPEN:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_NONE;
ssid->proto = 0;
break;
case WPS_AUTH_SHARED:
ssid->auth_alg = WPA_AUTH_ALG_SHARED;
ssid->key_mgmt = WPA_KEY_MGMT_NONE;
ssid->proto = 0;
break;
case WPS_AUTH_WPAPSK:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_PSK;
ssid->proto = WPA_PROTO_WPA;
break;
case WPS_AUTH_WPA:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
ssid->proto = WPA_PROTO_WPA;
break;
case WPS_AUTH_WPA2:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
ssid->proto = WPA_PROTO_RSN;
break;
case WPS_AUTH_WPA2PSK:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_PSK;
ssid->proto = WPA_PROTO_RSN;
break;
}
if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
if (cred->key_len == 2 * PMK_LEN) {
if (hexstr2bin((const char *) cred->key, ssid->psk,
PMK_LEN)) {
wpa_printf(MSG_ERROR, "WPS: Invalid Network "
"Key");
return -1;
}
ssid->psk_set = 1;
} else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
os_free(ssid->passphrase);
ssid->passphrase = os_malloc(cred->key_len + 1);
if (ssid->passphrase == NULL)
return -1;
os_memcpy(ssid->passphrase, cred->key, cred->key_len);
ssid->passphrase[cred->key_len] = '\0';
wpa_config_update_psk(ssid);
} else {
wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
"length %lu",
(unsigned long) cred->key_len);
return -1;
}
}
#ifndef CONFIG_NO_CONFIG_WRITE
if (wpa_s->conf->update_config &&
wpa_config_write(wpa_s->confname, wpa_s->conf)) {
wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
return -1;
}
#endif /* CONFIG_NO_CONFIG_WRITE */
return 0;
}
static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
struct wps_event_m2d *m2d)
{
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
"dev_password_id=%d config_error=%d",
m2d->dev_password_id, m2d->config_error);
}
static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
struct wps_event_fail *fail)
{
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
wpas_clear_wps(wpa_s);
}
static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
{
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
wpa_s->wps_success = 1;
}
static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
union wps_event_data *data)
{
struct wpa_supplicant *wpa_s = ctx;
switch (event) {
case WPS_EV_M2D:
wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
break;
case WPS_EV_FAIL:
wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
break;
case WPS_EV_SUCCESS:
wpa_supplicant_wps_event_success(wpa_s);
break;
case WPS_EV_PWD_AUTH_FAIL:
break;
}
}
enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
{
if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
eap_is_wps_pin_enrollee(&ssid->eap))
return WPS_REQ_ENROLLEE;
else
return WPS_REQ_REGISTRAR;
}
static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
{
int id;
struct wpa_ssid *ssid;
eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
/* Remove any existing WPS network from configuration */
ssid = wpa_s->conf->ssid;
while (ssid) {
if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
if (ssid == wpa_s->current_ssid)
wpa_s->current_ssid = NULL;
id = ssid->id;
} else
id = -1;
ssid = ssid->next;
if (id >= 0)
wpa_config_remove_network(wpa_s->conf, id);
}
}
static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
"out");
wpas_clear_wps(wpa_s);
}
static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
int registrar, const u8 *bssid)
{
struct wpa_ssid *ssid;
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return NULL;
wpa_config_set_network_defaults(ssid);
if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
wpa_config_set(ssid, "identity", registrar ?
"\"" WSC_ID_REGISTRAR "\"" :
"\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
wpa_config_remove_network(wpa_s->conf, ssid->id);
return NULL;
}
if (bssid) {
size_t i;
struct wpa_scan_res *res;
os_memcpy(ssid->bssid, bssid, ETH_ALEN);
ssid->bssid_set = 1;
/* Try to get SSID from scan results */
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0)
return ssid; /* Could not find any scan results */
for (i = 0; i < wpa_s->scan_res->num; i++) {
const u8 *ie;
res = wpa_s->scan_res->res[i];
if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
continue;
ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
if (ie == NULL)
break;
os_free(ssid->ssid);
ssid->ssid = os_malloc(ie[1]);
if (ssid->ssid == NULL)
break;
os_memcpy(ssid->ssid, ie + 2, ie[1]);
ssid->ssid_len = ie[1];
break;
}
}
return ssid;
}
static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
struct wpa_ssid *selected)
{
struct wpa_ssid *ssid;
/* Mark all other networks disabled and trigger reassociation */
ssid = wpa_s->conf->ssid;
while (ssid) {
ssid->disabled = ssid != selected;
ssid = ssid->next;
}
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_s->scan_runs = 0;
wpa_s->wps_success = 0;
wpa_s->blacklist_cleared = 0;
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
{
struct wpa_ssid *ssid;
wpas_clear_wps(wpa_s);
ssid = wpas_wps_add_network(wpa_s, 0, bssid);
if (ssid == NULL)
return -1;
wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
wpa_s, NULL);
wpas_wps_reassoc(wpa_s, ssid);
return 0;
}
int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
const char *pin)
{
struct wpa_ssid *ssid;
char val[128];
unsigned int rpin = 0;
wpas_clear_wps(wpa_s);
ssid = wpas_wps_add_network(wpa_s, 0, bssid);
if (ssid == NULL)
return -1;
if (pin)
os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
else {
rpin = wps_generate_pin();
os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
}
wpa_config_set(ssid, "phase1", val, 0);
eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
wpa_s, NULL);
wpas_wps_reassoc(wpa_s, ssid);
return rpin;
}
#ifdef CONFIG_WPS_OOB
int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
char *path, char *method)
{
struct wps_context *wps = wpa_s->wps;
struct oob_device_data *oob_dev;
oob_dev = wps_get_oob_device(device_type);
if (oob_dev == NULL)
return -1;
oob_dev->device_path = path;
wps->oob_conf.oob_method = wps_get_oob_method(method);
if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
/*
* Use pre-configured DH keys in order to be able to write the
* key hash into the OOB file.
*/
wpabuf_free(wps->dh_pubkey);
wpabuf_free(wps->dh_privkey);
wps->dh_privkey = NULL;
wps->dh_pubkey = dh_init(dh_groups_get(WPS_DH_GROUP),
&wps->dh_privkey);
wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
if (wps->dh_pubkey == NULL) {
wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
"Diffie-Hellman handshake");
return -1;
}
}
if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
wpas_clear_wps(wpa_s);
if (wps_process_oob(wps, oob_dev, 0) < 0)
return -1;
if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
wpas_wps_start_pin(wpa_s, NULL,
wpabuf_head(wps->oob_conf.dev_password)) < 0)
return -1;
return 0;
}
#endif /* CONFIG_WPS_OOB */
int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
const char *pin)
{
struct wpa_ssid *ssid;
char val[30];
if (!pin)
return -1;
wpas_clear_wps(wpa_s);
ssid = wpas_wps_add_network(wpa_s, 1, bssid);
if (ssid == NULL)
return -1;
os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
wpa_config_set(ssid, "phase1", val, 0);
eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
wpa_s, NULL);
wpas_wps_reassoc(wpa_s, ssid);
return 0;
}
static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
size_t psk_len)
{
wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
"STA " MACSTR, MAC2STR(mac_addr));
wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
/* TODO */
return 0;
}
static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
const struct wps_device_data *dev)
{
char uuid[40], txt[400];
int len;
if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
return;
wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
" [%s|%s|%s|%s|%s|%d-%08X-%d]",
uuid, MAC2STR(dev->mac_addr), dev->device_name,
dev->manufacturer, dev->model_name,
dev->model_number, dev->serial_number,
dev->categ, dev->oui, dev->sub_categ);
if (len > 0 && len < (int) sizeof(txt))
wpa_printf(MSG_INFO, "%s", txt);
}
int wpas_wps_init(struct wpa_supplicant *wpa_s)
{
struct wps_context *wps;
struct wps_registrar_config rcfg;
wps = os_zalloc(sizeof(*wps));
if (wps == NULL)
return -1;
wps->cred_cb = wpa_supplicant_wps_cred;
wps->event_cb = wpa_supplicant_wps_event;
wps->cb_ctx = wpa_s;
wps->dev.device_name = wpa_s->conf->device_name;
wps->dev.manufacturer = wpa_s->conf->manufacturer;
wps->dev.model_name = wpa_s->conf->model_name;
wps->dev.model_number = wpa_s->conf->model_number;
wps->dev.serial_number = wpa_s->conf->serial_number;
if (wpa_s->conf->device_type) {
char *pos;
u8 oui[4];
/* <categ>-<OUI>-<subcateg> */
wps->dev.categ = atoi(wpa_s->conf->device_type);
pos = os_strchr(wpa_s->conf->device_type, '-');
if (pos == NULL) {
wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
os_free(wps);
return -1;
}
pos++;
if (hexstr2bin(pos, oui, 4)) {
wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
os_free(wps);
return -1;
}
wps->dev.oui = WPA_GET_BE32(oui);
pos = os_strchr(pos, '-');
if (pos == NULL) {
wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
os_free(wps);
return -1;
}
pos++;
wps->dev.sub_categ = atoi(pos);
}
wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
if (is_nil_uuid(wpa_s->conf->uuid)) {
uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
wps->uuid, WPS_UUID_LEN);
} else
os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
os_memset(&rcfg, 0, sizeof(rcfg));
rcfg.new_psk_cb = wpas_wps_new_psk_cb;
rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
rcfg.cb_ctx = wpa_s;
wps->registrar = wps_registrar_init(wps, &rcfg);
if (wps->registrar == NULL) {
wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
os_free(wps);
return -1;
}
wpa_s->wps = wps;
return 0;
}
void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
if (wpa_s->wps == NULL)
return;
wps_registrar_deinit(wpa_s->wps->registrar);
wpabuf_free(wpa_s->wps->dh_pubkey);
wpabuf_free(wpa_s->wps->dh_privkey);
wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
wpabuf_free(wpa_s->wps->oob_conf.dev_password);
os_free(wpa_s->wps->network_key);
os_free(wpa_s->wps);
wpa_s->wps = NULL;
}
int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid, struct wpa_scan_res *bss)
{
struct wpabuf *wps_ie;
if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
return -1;
wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
if (!wps_ie) {
wpa_printf(MSG_DEBUG, " skip - non-WPS AP");
return 0;
}
if (!wps_is_selected_pbc_registrar(wps_ie)) {
wpa_printf(MSG_DEBUG, " skip - WPS AP "
"without active PBC Registrar");
wpabuf_free(wps_ie);
return 0;
}
/* TODO: overlap detection */
wpa_printf(MSG_DEBUG, " selected based on WPS IE "
"(Active PBC)");
wpabuf_free(wps_ie);
return 1;
}
if (eap_is_wps_pin_enrollee(&ssid->eap)) {
if (!wps_ie) {
wpa_printf(MSG_DEBUG, " skip - non-WPS AP");
return 0;
}
/*
* Start with WPS APs that advertise active PIN Registrar and
* allow any WPS AP after third scan since some APs do not set
* Selected Registrar attribute properly when using external
* Registrar.
*/
if (!wps_is_selected_pin_registrar(wps_ie)) {
if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
wpa_printf(MSG_DEBUG, " skip - WPS AP "
"without active PIN Registrar");
wpabuf_free(wps_ie);
return 0;
}
wpa_printf(MSG_DEBUG, " selected based on WPS IE");
} else {
wpa_printf(MSG_DEBUG, " selected based on WPS IE "
"(Active PIN)");
}
wpabuf_free(wps_ie);
return 1;
}
if (wps_ie) {
wpa_printf(MSG_DEBUG, " selected based on WPS IE");
wpabuf_free(wps_ie);
return 1;
}
return -1;
}
int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
struct wpa_scan_res *bss)
{
struct wpabuf *wps_ie = NULL;
int ret = 0;
if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
/* allow wildcard SSID for WPS PBC */
ret = 1;
}
} else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (wps_ie &&
(wps_is_selected_pin_registrar(wps_ie) ||
wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
/* allow wildcard SSID for WPS PIN */
ret = 1;
}
}
if (!ret && ssid->bssid_set &&
os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
/* allow wildcard SSID due to hardcoded BSSID match */
ret = 1;
}
wpabuf_free(wps_ie);
return ret;
}
int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
struct wpa_scan_res *selected,
struct wpa_ssid *ssid)
{
const u8 *sel_uuid, *uuid;
size_t i;
struct wpabuf *wps_ie;
int ret = 0;
if (!eap_is_wps_pbc_enrollee(&ssid->eap))
return 0;
/* Make sure that only one AP is in active PBC mode */
wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
if (wps_ie)
sel_uuid = wps_get_uuid_e(wps_ie);
else
sel_uuid = NULL;
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
struct wpabuf *ie;
if (bss == selected)
continue;
ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (!ie)
continue;
if (!wps_is_selected_pbc_registrar(ie)) {
wpabuf_free(ie);
continue;
}
uuid = wps_get_uuid_e(ie);
if (sel_uuid == NULL || uuid == NULL ||
os_memcmp(sel_uuid, uuid, 16) != 0) {
ret = 1; /* PBC overlap */
wpabuf_free(ie);
break;
}
/* TODO: verify that this is reasonable dual-band situation */
wpabuf_free(ie);
}
wpabuf_free(wps_ie);
return ret;
}
void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
{
size_t i;
if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
return;
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
struct wpabuf *ie;
ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (!ie)
continue;
if (wps_is_selected_pbc_registrar(ie))
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
else if (wps_is_selected_pin_registrar(ie))
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
else
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
wpabuf_free(ie);
break;
}
}
int wpas_wps_searching(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid;
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
return 1;
}
return 0;
}