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
|
/*
* BIRD Library -- IPv4 Address Manipulation Functions
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef IPV6
#include <string.h>
#include <stdlib.h>
#include "nest/bird.h"
#include "lib/ip.h"
#include "lib/string.h"
int
ipv4_classify(u32 a)
{
u32 b = a >> 24U;
if (b && b <= 0xdf)
{
if (b == 0x7f)
return IADDR_HOST | SCOPE_HOST;
else
return IADDR_HOST | SCOPE_UNIVERSE;
}
if (b >= 0xe0 && b <= 0xef)
return IADDR_MULTICAST | SCOPE_UNIVERSE;
if (a == 0xffffffff)
return IADDR_BROADCAST | SCOPE_LINK;
return IADDR_INVALID;
}
char *
ip_ntop(ip_addr a, char *b)
{
u32 x = _I(a);
return b + bsprintf(b, "%d.%d.%d.%d",
((x >> 24) & 0xff),
((x >> 16) & 0xff),
((x >> 8) & 0xff),
(x & 0xff));
}
char *
ip_ntox(ip_addr a, char *b)
{
return b + bsprintf(b, "%08x", _I(a));
}
u32
ipv4_class_mask(u32 a)
{
u32 m;
if (a < 0x80000000)
m = 0xff000000;
if (a < 0xc0000000)
m = 0xffff0000;
else
m = 0xffffff00;
while (a & ~m)
m |= m >> 1;
return m;
}
int
ip_pton(char *a, ip_addr *o)
{
int i,j;
unsigned long int l;
u32 ia = 0;
i=4;
while (i--)
{
char *d, *c = strchr(a, '.');
if (!c != !i)
return 0;
l = strtoul(a, &d, 10);
if (d != c && *d || l > 255)
return 0;
ia = (ia << 8) | l;
if (c)
c++;
a = c;
}
*o = ipa_from_u32(ia);
return 1;
}
#endif
|
