65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
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/*
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* wpa_supplicant/hostapd / Internal implementation of OS specific functions
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* Copyright (c) 2005-2006, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*
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* This file is an example of operating system specific wrapper functions.
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* This version implements many of the functions internally, so it can be used
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* to fill in missing functions from the target system C libraries.
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*
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* Some of the functions are using standard C library calls in order to keep
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* this file in working condition to allow the functions to be tested on a
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* Linux target. Please note that OS_NO_C_LIB_DEFINES needs to be defined for
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* this file to work correctly. Note that these implementations are only
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* examples and are not optimized for speed.
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*/
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#include "crypto/common.h"
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#include "os.h"
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#include <stdlib.h>
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#include <time.h>
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#include <sys/time.h>
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#include "esp_system.h"
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int os_get_time(struct os_time *t)
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{
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return gettimeofday((struct timeval*) t, NULL);
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}
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unsigned long os_random(void)
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{
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return esp_random();
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}
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unsigned long r_rand(void) __attribute__((alias("os_random")));
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int os_get_random(unsigned char *buf, size_t len)
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{
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int i, j;
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unsigned long tmp;
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for (i = 0; i < ((len + 3) & ~3) / 4; i++) {
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tmp = r_rand();
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for (j = 0; j < 4; j++) {
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if ((i * 4 + j) < len) {
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buf[i * 4 + j] = (uint8_t)(tmp >> (j * 8));
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} else {
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break;
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}
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}
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}
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return 0;
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}
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