mirror of
https://github.com/espressif/esp-idf.git
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691997af91
Make sure that WPS registrar public APIs do not modify supplicant data in application task context. Execute API functionlity in eloop context to prevent protential race conditions.
382 lines
9.6 KiB
C
382 lines
9.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2019-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "utils/common.h"
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#include "rsn_supp/wpa.h"
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#include "common/eapol_common.h"
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#include "utils/wpa_debug.h"
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#include "common/ieee802_11_defs.h"
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#include "wps/wps_i.h"
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#include "wps/wps_dev_attr.h"
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#include "eap_peer/eap_defs.h"
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#include "eap_peer/eap_common.h"
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#include "esp_wifi_driver.h"
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#include "esp_event.h"
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#include "esp_wifi.h"
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#include "esp_err.h"
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#include "esp_private/wifi.h"
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#include "esp_wps.h"
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#include "esp_wps_i.h"
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#include "eap_common/eap_wsc_common.h"
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#include "esp_wpas_glue.h"
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#include "ap/hostapd.h"
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#include "ap/ap_config.h"
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#include "ap/wps_hostapd.h"
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#include "utils/eloop.h"
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extern struct wps_sm *gWpsSm;
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extern void *s_wps_api_lock;
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extern void *s_wps_api_sem;
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extern bool s_wps_enabled;
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static int wps_reg_eloop_post_block(uint32_t sig, void *arg);
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static int wifi_ap_wps_init(const esp_wps_config_t *config)
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{
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struct wps_sm *sm = NULL;
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uint8_t mac[ETH_ALEN];
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struct wps_config cfg = {0};
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struct hostapd_data *hapd = hostapd_get_hapd_data();
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if (!hapd || gWpsSm) {
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goto _out;
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}
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wpa_printf(MSG_DEBUG, "wifi wps init");
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gWpsSm = os_zalloc(sizeof(struct wps_sm)); /* alloc Wps_sm */
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if (!gWpsSm) {
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goto _out;
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}
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sm = gWpsSm;
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esp_wifi_get_macaddr_internal(WIFI_IF_AP, mac);
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os_memcpy(sm->ownaddr, mac, ETH_ALEN);
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sm->identity_len = WSC_ID_REGISTRAR_LEN;
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os_memcpy(sm->identity, WSC_ID_REGISTRAR, sm->identity_len);
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sm->wps_ctx = os_zalloc(sizeof(struct wps_context)); /* alloc wps_ctx */
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if (!sm->wps_ctx) {
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goto _err;
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}
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if (wps_dev_init() != 0) {
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goto _err;
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}
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cfg.registrar = 1;
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cfg.wps = sm->wps_ctx;
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os_memcpy((void *)cfg.pin, config->pin, 8);
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wps_init_cfg_pin(&cfg);
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os_memcpy(cfg.wps->uuid, sm->uuid, WPS_UUID_LEN);
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if ((sm->wps = wps_init(&cfg)) == NULL) { /* alloc wps_data */
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goto _err;
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}
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hostapd_init_wps(hapd, sm->wps, sm->wps_ctx);
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/* Report PIN */
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if (wps_get_type() == WPS_TYPE_PIN) {
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wifi_event_sta_wps_er_pin_t evt;
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os_memcpy(evt.pin_code, sm->wps->dev_password, 8);
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esp_event_post(WIFI_EVENT, WIFI_EVENT_AP_WPS_RG_PIN, &evt, sizeof(evt), OS_BLOCK);
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}
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return ESP_OK;
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_err:
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if (sm->dev) {
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wps_dev_deinit(sm->dev);
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sm->dev = NULL;
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}
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if (sm->wps_ctx) {
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os_free(sm->wps_ctx);
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sm->wps_ctx = NULL;
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}
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if (sm->wps) {
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wps_deinit(sm->wps);
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sm->wps = NULL;
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}
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os_free(gWpsSm);
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gWpsSm = NULL;
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return ESP_FAIL;
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_out:
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return ESP_FAIL;
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}
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int wifi_ap_wps_deinit(void)
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{
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struct wps_sm *sm = gWpsSm;
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if (gWpsSm == NULL) {
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return ESP_FAIL;
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}
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hostapd_deinit_wps(hostapd_get_hapd_data());
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if (sm->wps) {
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sm->wps->registrar = 0;
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wps_deinit(sm->wps);
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sm->wps = NULL;
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}
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if (sm->dev) {
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wps_dev_deinit(sm->dev);
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sm->dev = NULL;
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}
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if (sm->wps_ctx) {
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os_free(sm->wps_ctx);
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sm->wps_ctx = NULL;
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}
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os_free(gWpsSm);
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gWpsSm = NULL;
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return ESP_OK;
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}
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static int wifi_ap_wps_enable_internal(const esp_wps_config_t *config)
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{
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struct wps_sm *sm = gWpsSm;
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wifi_mode_t mode = WIFI_MODE_NULL;
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if (esp_wifi_get_user_init_flag_internal() == 0) {
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wpa_printf(MSG_ERROR, "wps enable: wifi not started cannot enable wpsreg");
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return ESP_ERR_WIFI_STATE;
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}
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if (esp_wifi_get_mode(&mode) != ESP_OK) {
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wpa_printf(MSG_ERROR, "wps enable: unable to get current wifi mode");
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return ESP_FAIL;
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}
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if (mode != WIFI_MODE_AP && mode != WIFI_MODE_APSTA) {
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wpa_printf(MSG_ERROR, "wps enable: mode=%d does not include AP", mode);
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return ESP_ERR_WIFI_MODE;
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}
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if (esp_wifi_ap_get_prof_authmode_internal() == WIFI_AUTH_OPEN) {
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wpa_printf(MSG_ERROR, "wps enable: wpsreg not supported when authmode is open");
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return ESP_ERR_WIFI_MODE;
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}
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if (s_wps_enabled) {
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if (sm && os_memcmp(sm->identity, WSC_ID_ENROLLEE, sm->identity_len) == 0) {
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wpa_printf(MSG_ERROR, "wps enable: wps enrollee already enabled cannot enable wpsreg");
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return ESP_ERR_WIFI_MODE;
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} else {
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wpa_printf(MSG_DEBUG, "wps enable: already enabled");
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return ESP_OK;
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}
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}
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if (config->wps_type == WPS_TYPE_DISABLE) {
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wpa_printf(MSG_ERROR, "wps enable: invalid wps type");
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return ESP_ERR_WIFI_WPS_TYPE;
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}
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wpa_printf(MSG_DEBUG, "Set factory information.");
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if (wps_set_factory_info(config) != ESP_OK) {
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return ESP_FAIL;
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}
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if (wps_set_type(config->wps_type) != ESP_OK) {
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goto _err;
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}
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if (wps_set_status(WPS_STATUS_DISABLE) != ESP_OK) {
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goto _err;
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}
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if (wifi_ap_wps_init(config) != ESP_OK) {
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goto _err;
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}
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wpa_printf(MSG_INFO, "wifi_wps_enable");
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s_wps_enabled = true;
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return ESP_OK;
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_err:
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wpa_printf(MSG_ERROR, "failure in wifi_wps_enable");
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wps_set_type(WPS_TYPE_DISABLE);
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wps_set_status(WPS_STATUS_DISABLE);
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return ESP_FAIL;
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}
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int esp_wifi_ap_wps_enable(const esp_wps_config_t *config)
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{
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int ret = ESP_OK;
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API_MUTEX_TAKE();
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ret = wps_reg_eloop_post_block(SIG_WPS_REG_ENABLE, (void *) config);
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API_MUTEX_GIVE();
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return ret;
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}
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static int wifi_ap_wps_disable_internal(void)
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{
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struct wps_sm *sm = gWpsSm;
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if (sm && os_memcmp(sm->identity, WSC_ID_ENROLLEE, sm->identity_len) == 0) {
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return ESP_ERR_WIFI_MODE;
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}
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if (!s_wps_enabled) {
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wpa_printf(MSG_DEBUG, "wps disable: already disabled");
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return ESP_OK;
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}
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wpa_printf(MSG_INFO, "wifi_wps_disable");
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if (wps_set_type(WPS_TYPE_DISABLE) != ESP_OK) {
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goto _err;
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}
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if (wps_set_status(WPS_STATUS_DISABLE) != ESP_OK) {
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goto _err;
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}
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if (wifi_ap_wps_deinit() != ESP_OK) {
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goto _err;
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}
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s_wps_enabled = false;
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return ESP_OK;
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_err:
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wpa_printf(MSG_ERROR, "wps disable: failed to disable wps");
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return ESP_FAIL;
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}
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int esp_wifi_ap_wps_disable(void)
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{
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int ret = ESP_FAIL;
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API_MUTEX_TAKE();
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ret = wps_reg_eloop_post_block(SIG_WPS_REG_DISABLE, NULL);
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API_MUTEX_GIVE();
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return ret;
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}
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static int wifi_ap_wps_start_internal(const unsigned char *pin)
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{
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wifi_mode_t mode = WIFI_MODE_NULL;
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esp_wifi_get_mode(&mode);
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if (mode != WIFI_MODE_AP && mode != WIFI_MODE_APSTA) {
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wpa_printf(MSG_ERROR, "wps start: mode=%d does not include AP", mode);
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return ESP_ERR_WIFI_MODE;
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}
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if (!s_wps_enabled) {
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wpa_printf(MSG_ERROR, "wps start: wps not enabled");
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API_MUTEX_GIVE();
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return ESP_ERR_WIFI_WPS_SM;
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}
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if (wps_get_type() == WPS_TYPE_DISABLE ||
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(wps_get_status() != WPS_STATUS_DISABLE &&
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wps_get_status() != WPS_STATUS_SCANNING)) {
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wpa_printf(MSG_ERROR, "wps start: wps_get_type=%d wps_get_status=%d",
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wps_get_type(), wps_get_status());
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return ESP_ERR_WIFI_WPS_TYPE;
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}
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if (esp_wifi_get_user_init_flag_internal() == 0) {
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wpa_printf(MSG_ERROR, "wps start: esp_wifi_get_user_init_flag_internal=%d",
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esp_wifi_get_user_init_flag_internal());
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return ESP_ERR_WIFI_STATE;
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}
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if (!pin) {
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pin = gWpsSm->wps->dev_password;
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}
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/* TODO ideally SoftAP mode should also do a single scan in PBC mode
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* however softAP scanning is not available at the moment */
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if (wps_set_status(WPS_STATUS_PENDING) != ESP_OK) {
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return ESP_FAIL;
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}
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if (wps_get_type() == WPS_TYPE_PBC) {
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if (hostapd_wps_button_pushed(hostapd_get_hapd_data(), NULL) != ESP_OK) {
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return ESP_FAIL;
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}
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} else if (wps_get_type() == WPS_TYPE_PIN) {
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if (hostapd_wps_add_pin(hostapd_get_hapd_data(), pin) != ESP_OK) {
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return ESP_FAIL;
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}
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}
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return ESP_OK;
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}
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int esp_wifi_ap_wps_start(const unsigned char *pin)
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{
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int ret = ESP_FAIL;
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API_MUTEX_TAKE();
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ret = wps_reg_eloop_post_block(SIG_WPS_REG_START, (void *)pin);
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API_MUTEX_GIVE();
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return ret;
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}
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static void wps_reg_eloop_handler(void *eloop_ctx, void *user_ctx)
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{
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int ret = ESP_FAIL;
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enum wps_reg_sig_type *sig = (enum wps_reg_sig_type *) eloop_ctx;
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wps_ioctl_param_t *param = (wps_ioctl_param_t *) user_ctx;
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switch(*sig) {
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case SIG_WPS_REG_ENABLE:
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esp_wps_config_t *config = (esp_wps_config_t *)param->arg;
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ret = wifi_ap_wps_enable_internal(config);
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break;
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case SIG_WPS_REG_START:
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unsigned char *pin = (unsigned char *)param->arg;
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ret = wifi_ap_wps_start_internal((const unsigned char *)pin);
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break;
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case SIG_WPS_REG_DISABLE:
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ret = wifi_ap_wps_disable_internal();
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break;
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default:
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wpa_printf(MSG_WARNING, "%s(): invalid signal type=%d", __func__, *sig);
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ret = ESP_FAIL;
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break;
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}
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param->ret = ret;
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os_semphr_give(s_wps_api_sem);
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}
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static int wps_reg_eloop_post_block(uint32_t sig, void *arg)
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{
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int ret = ESP_FAIL;
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wps_ioctl_param_t param;
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param.ret = ESP_FAIL;
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param.arg = arg;
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if (s_wps_api_sem == NULL) {
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s_wps_api_sem = os_semphr_create(1, 0);
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if (s_wps_api_sem == NULL) {
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wpa_printf(MSG_ERROR, "%s(): failed to create WPA API semaphore", __func__);
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return ESP_ERR_NO_MEM;
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}
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}
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eloop_register_timeout(0, 0, wps_reg_eloop_handler, (void *)&sig, (void *)¶m);
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if (TRUE == os_semphr_take(s_wps_api_sem, OS_BLOCK)) {
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ret = param.ret;
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} else {
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ret = ESP_FAIL;
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}
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return ret;
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}
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