1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
* netsniff-ng - the packet sniffing beast
* Copyright 2009, 2010 Daniel Borkmann.
* Subject to the GPL, version 2.
*/
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <arpa/inet.h>
#include "str.h"
#include "die.h"
#include "xmalloc.h"
size_t strlcpy(char *dest, const char *src, size_t size)
{
size_t ret = strlen(src);
if (size) {
size_t len = (ret >= size) ? size - 1 : ret;
memcpy(dest, src, len);
dest[len] = '\0';
}
return ret;
}
static inline int vslprintf(char *dst, size_t size, const char *fmt, va_list ap)
{
int ret;
ret = vsnprintf(dst, size, fmt, ap);
dst[size - 1] = '\0';
return ret;
}
int slprintf(char *dst, size_t size, const char *fmt, ...)
{
int ret;
va_list ap;
va_start(ap, fmt);
ret = vslprintf(dst, size, fmt, ap);
va_end(ap);
return ret;
}
int slprintf_nocheck(char *dst, size_t size, const char *fmt, ...)
{
int ret;
va_list ap;
va_start(ap, fmt);
ret = vslprintf(dst, size, fmt, ap);
va_end(ap);
return ret;
}
noinline void *xmemset(void *s, int c, size_t n)
{
size_t i;
uint8_t *ptr = s;
for (i = 0; i < n; ++i)
ptr[i] = (uint8_t) c;
return ptr;
}
char *strtrim_right(char *p, char c)
{
char *end;
size_t len;
len = strlen(p);
while (*p && len) {
end = p + len - 1;
if (c == *end)
*end = 0;
else
break;
len = strlen(p);
}
return p;
}
char *argv2str(int startind, int argc, char **argv)
{
off_t offset = 0;
char *str = NULL;
int ret, i;
for (i = startind; i < argc; ++i) {
size_t alen = strlen(argv[i]) + 2;
size_t slen = str ? strlen(str) : 0;
str = xrealloc(str, slen + alen);
ret = slprintf(str + offset, strlen(argv[i]) + 2, "%s ", argv[i]);
if (ret < 0)
panic("Cannot concatenate string!\n");
else
offset += ret;
}
return str;
}
char **argv_insert(char **argv, size_t *count, const char *str)
{
argv = xrealloc(argv, (*count + 2) * sizeof(char *));
argv[*count] = str ? xstrdup(str) : xstrdup("");
argv[*count + 1] = NULL;
*count += 1;
return argv;
}
void argv_free(char **argv)
{
char **tmp = argv;
for (; argv && *argv; argv++)
free(*argv);
free(tmp);
}
int str2mac(const char *str, uint8_t *mac, size_t len)
{
int i, count;
unsigned int tmp[6];
if (!str)
return -EINVAL;
if (len < 6)
return -ENOSPC;
count = sscanf(str, "%02X:%02X:%02X:%02X:%02X:%02X",
&tmp[0], &tmp[1], &tmp[2], &tmp[3], &tmp[4], &tmp[5]);
if (errno || count != 6)
count = sscanf(str, "%02x:%02x:%02x:%02x:%02x:%02x",
&tmp[0], &tmp[1], &tmp[2], &tmp[3], &tmp[4], &tmp[5]);
if (count != 6)
return -EINVAL;
if (errno)
return -errno;
for (i = 0; i < 6; i++)
mac[i] = (uint8_t)tmp[i];
return 0;
}
|
