esp-idf/components/wpa_supplicant/port/os_xtensa.c

/*
 * wpa_supplicant/hostapd / Internal implementation of OS specific functions
 * Copyright (c) 2005-2006, 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.
 *
 * This file is an example of operating system specific  wrapper functions.
 * This version implements many of the functions internally, so it can be used
 * to fill in missing functions from the target system C libraries.
 *
 * Some of the functions are using standard C library calls in order to keep
 * this file in working condition to allow the functions to be tested on a
 * Linux target. Please note that OS_NO_C_LIB_DEFINES needs to be defined for
 * this file to work correctly. Note that these implementations are only
 * examples and are not optimized for speed.
 */

#include "os.h"
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include "esp_random.h"
#include "utils/common.h"
#include "mbedtls/platform_util.h"

int os_get_time(struct os_time *t)
{
    struct timeval tv;
    int ret = gettimeofday(&tv, NULL);
    t->sec = (os_time_t) tv.tv_sec;
    t->usec = tv.tv_usec;
    return ret;
}

unsigned long os_random(void)
{
    return esp_random();
}

int os_get_random(unsigned char *buf, size_t len)
{
    esp_fill_random(buf, len);
    return 0;
}

void os_sleep(os_time_t sec, os_time_t usec)
{
    if (sec) {
        sleep(sec);
    }
    if (usec) {
        usleep(usec);
    }
}

#ifdef CONFIG_CRYPTO_MBEDTLS
void forced_memzero(void *ptr, size_t len)
{
    mbedtls_platform_zeroize(ptr, len);
}
#endif