mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-18 00:58:42 +00:00
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
|
|
* BIRD -- IP Addresses et Cetera for IPv6
|
|
*
|
|
* (c) 1998 Martin Mares <mj@ucw.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_IPV6_H_
|
|
#define _BIRD_IPV6_H_
|
|
|
|
#include <netinet/in.h>
|
|
#include <string.h>
|
|
|
|
typedef struct ipv4_addr {
|
|
u32 addr[4];
|
|
} ip_addr;
|
|
|
|
#define _MI(a,b,c,d) ((struct ip_addr) { a, b, c, d })
|
|
#define _I0(a) ((a).addr[0])
|
|
#define _I1(a) ((a).addr[1])
|
|
#define _I2(a) ((a).addr[2])
|
|
#define _I3(a) ((a).addr[3])
|
|
|
|
#define BITS_PER_IP_ADDRESS 128
|
|
#define STD_ADDRESS_P_LENGTH 39
|
|
|
|
#define IPA_NONE _MI(0,0,0,0)
|
|
|
|
#define ipa_equal(x,y) (!memcmp(&(x),&(y),sizeof(ip_addr)))
|
|
#define ipa_nonzero(x) (_I0(a) || _I1(a) || _I2(a) || _I3(a))
|
|
#define ipa_and(a,b) _MI(_I0(a) & _I0(b), \
|
|
_I1(a) & _I1(b), \
|
|
_I2(a) & _I2(b), \
|
|
_I3(a) & _I3(b))
|
|
#define ipa_or(a,b) _MI(_I0(a) | _I0(b), \
|
|
_I1(a) | _I1(b), \
|
|
_I2(a) | _I2(b), \
|
|
_I3(a) | _I3(b))
|
|
#define ipa_xor(a,b) _MI(_I0(a) ^ _I0(b), \
|
|
_I1(a) ^ _I1(b), \
|
|
_I2(a) ^ _I2(b), \
|
|
_I3(a) ^ _I3(b))
|
|
#define ipa_not(a) _MI(~_I0(a),~_I1(a),~_I2(a),~_I3(a))
|
|
#define ipa_mkmask(x) ipv6_mkmask(x)
|
|
#define ipa_mklen(x) ipv6_mklen(&(x))
|
|
#define ipa_hash(x) ipv6_hash(&(x))
|
|
#define ipa_hton(x) ipv6_hton(&(x))
|
|
#define ipa_ntoh(x) ipv6_ntoh(&(x))
|
|
#define ipa_classify(x) ipv6_classify(&(x))
|
|
|
|
ip_addr ipv6_mkmask(unsigned);
|
|
unsigned ipv6_mklen(ip_addr *);
|
|
int ipv6_classify(ip_addr *);
|
|
void ipv6_hton(ip_addr *);
|
|
void ipv6_ntoh(ip_addr *);
|
|
|
|
/* FIXME: Is this hash function uniformly distributed over standard routing tables? */
|
|
static inline unsigned ipv6_hash(ip_addr *a)
|
|
{
|
|
u32 x = _I0(*a) ^ _I1(*a) ^ _I2(*a) ^ _I3(*a);
|
|
return (x ^ (x >> 16) ^ (x >> 8)) & 0xffff;
|
|
}
|
|
|
|
#endif
|