1 /*
2 * wpa_supplicant/hostapd / Internal implementation of OS specific functions
3 * Copyright (c) 2005-2006, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 *
14 * This file is an example of operating system specific wrapper functions.
15 * This version implements many of the functions internally, so it can be used
16 * to fill in missing functions from the target system C libraries.
17 *
18 * Some of the functions are using standard C library calls in order to keep
19 * this file in working condition to allow the functions to be tested on a
20 * Linux target. Please note that OS_NO_C_LIB_DEFINES needs to be defined for
21 * this file to work correctly. Note that these implementations are only
22 * examples and are not optimized for speed.
23 */
24
25 #include "os.h"
26 #include <stdlib.h>
27 #include <unistd.h>
28 #include <sys/time.h>
29 #include "esp_random.h"
30 #include "utils/common.h"
31 #include "mbedtls/platform_util.h"
32
os_get_time(struct os_time * t)33 int os_get_time(struct os_time *t)
34 {
35 struct timeval tv;
36 int ret = gettimeofday(&tv, NULL);
37 t->sec = (os_time_t) tv.tv_sec;
38 t->usec = tv.tv_usec;
39 return ret;
40 }
41
os_random(void)42 unsigned long os_random(void)
43 {
44 return esp_random();
45 }
46
os_get_random(unsigned char * buf,size_t len)47 int os_get_random(unsigned char *buf, size_t len)
48 {
49 esp_fill_random(buf, len);
50 return 0;
51 }
52
os_sleep(os_time_t sec,os_time_t usec)53 void os_sleep(os_time_t sec, os_time_t usec)
54 {
55 if (sec) {
56 sleep(sec);
57 }
58 if (usec) {
59 usleep(usec);
60 }
61 }
62
z_strdup(const char * s)63 char *z_strdup(const char *s) {
64 size_t size = strlen(s) + 1;
65 char *p = k_malloc(size);
66 if (p) {
67 memcpy(p, s, size);
68 }
69 return p;
70 }
71
tolower(unsigned char ch)72 int tolower(unsigned char ch) {
73 if (ch >= 'A' && ch <= 'Z')
74 ch = 'a' + (ch - 'A');
75
76 return ch;
77 }
78
z_strcasecmp(const char * str1,const char * str2)79 int z_strcasecmp(const char * str1, const char * str2)
80 {
81 const unsigned char *u1 = (const u_char *)s1,
82 const unsigned char *u2 = (const u_char *)s2;
83
84 while (tolower(*u1) == tolower(*u2++)) {
85 if (*u1++ == '\0') {
86 return 0;
87 }
88 }
89
90 return (tolower(*u1) - tolower(*--u2));
91 }
92
z_strcasecmp(const char * str1,const char * str2,size_t num)93 int z_strcasecmp(const char * str1, const char * str2, size_t num)
94 {
95 const unsigned char *u1 = (const u_char *)s1,
96 const unsigned char *u2 = (const u_char *)s2;
97 const size_t ch_compared = 0;
98
99 while ((ch_compared < num) && (tolower(*u1) == tolower(*u2++))) {
100 if (*u1++ == '\0') {
101 return 0;
102 }
103 ch_compared++;
104 }
105
106 return (tolower(*u1) - tolower(*--u2));
107 }
108
109 #ifdef CONFIG_CRYPTO_MBEDTLS
forced_memzero(void * ptr,size_t len)110 void forced_memzero(void *ptr, size_t len)
111 {
112 mbedtls_platform_zeroize(ptr, len);
113 }
114 #endif
115
