blob: 4c4fab90f196ff93ef1eb9aa323fd6e5ebb6cd39 (
plain)
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
|
/*
* BIRD -- IP Addresses et Cetera for IPv4
*
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_IPV4_H_
#define _BIRD_IPV4_H_
#include "lib/endian.h"
#include "lib/bitops.h"
#ifdef DEBUGGING
/*
* Use the structural representation when you want to make sure
* nobody unauthorized attempts to handle ip_addr as number.
*/
typedef struct ipv4_addr {
u32 addr;
} ip_addr;
#define _I(x) (x).addr
#define _MI(x) ((struct ipv4_addr) { x })
#else
typedef u32 ip_addr;
#define _I(x) (x)
#define _MI(x) (x)
#endif
#define BITS_PER_IP_ADDRESS 32
#define STD_ADDRESS_P_LENGTH 15
#define SIZE_OF_IP_HEADER 24
#define IPA_NONE (_MI(0))
#define ipa_equal(x,y) (_I(x) == _I(y))
#define ipa_nonzero(x) _I(x)
#define ipa_and(x,y) _MI(_I(x) & _I(y))
#define ipa_or(x,y) _MI(_I(x) | _I(y))
#define ipa_xor(x,y) _MI(_I(x) ^ _I(y))
#define ipa_not(x) _MI(~_I(x))
#define ipa_mkmask(x) _MI(u32_mkmask(x))
#define ipa_mklen(x) u32_masklen(_I(x))
#define ipa_hash(x) ipv4_hash(_I(x))
#define ipa_hton(x) x = _MI(htonl(_I(x)))
#define ipa_ntoh(x) x = _MI(ntohl(_I(x)))
#define ipa_classify(x) ipv4_classify(_I(x))
#define ipa_opposite(x,len) _MI(_I(x) ^ (len == 30 ? 3 : 1))
#define ipa_class_mask(x) _MI(ipv4_class_mask(_I(x)))
#define ipa_from_u32(x) _MI(x)
#define ipa_to_u32(x) _I(x)
#define ipa_compare(x,y) ipv4_compare(_I(x),_I(y))
#define ip_skip_header(x, y) ipv4_skip_header(x, y)
int ipv4_classify(u32);
u32 ipv4_class_mask(u32);
byte *ipv4_skip_header(byte *, int *);
static inline unsigned ipv4_hash(u32 a)
{
/* Returns a 16-bit value */
a ^= a >> 16;
a ^= a << 10;
return a & 0xffff;
}
static inline int ipv4_compare(u32 x, u32 y)
{
return (x > y) - (x < y);
}
#define IP_PREC_INTERNET_CONTROL 0xc0
#endif
|
