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
|
#ifndef __IP_SET_NETHASH_H
#define __IP_SET_NETHASH_H
#include <linux/netfilter_ipv4/ip_set.h>
#define SETTYPE_NAME "nethash"
#define MAX_RANGE 0x0000FFFF
struct ip_set_nethash {
ip_set_ip_t *members; /* the nethash proper */
uint32_t elements; /* number of elements */
uint32_t hashsize; /* hash size */
uint16_t probes; /* max number of probes */
uint16_t resize; /* resize factor in percent */
unsigned char cidr[30]; /* CIDR sizes */
void *initval[0]; /* initvals for jhash_1word */
};
struct ip_set_req_nethash_create {
uint32_t hashsize;
uint16_t probes;
uint16_t resize;
};
struct ip_set_req_nethash {
ip_set_ip_t ip;
unsigned char cidr;
};
static unsigned char shifts[] = {255, 253, 249, 241, 225, 193, 129, 1};
static inline ip_set_ip_t
pack(ip_set_ip_t ip, unsigned char cidr)
{
ip_set_ip_t addr, *paddr = &addr;
unsigned char n, t, *a;
addr = htonl(ip & (0xFFFFFFFF << (32 - (cidr))));
#ifdef __KERNEL__
DP("ip:%u.%u.%u.%u/%u", NIPQUAD(addr), cidr);
#endif
n = cidr / 8;
t = cidr % 8;
a = &((unsigned char *)paddr)[n];
*a = *a /(1 << (8 - t)) + shifts[t];
#ifdef __KERNEL__
DP("n: %u, t: %u, a: %u", n, t, *a);
DP("ip:%u.%u.%u.%u/%u, %u.%u.%u.%u",
HIPQUAD(ip), cidr, NIPQUAD(addr));
#endif
return ntohl(addr);
}
#endif /* __IP_SET_NETHASH_H */
|
