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
|
#include <netlink/cli/utils.h>
#include <linux/netlink.h>
static void change_cb(struct nl_cache *cache, struct nl_object *obj,
int action, void *data)
{
struct nfnl_ct *ct = (struct nfnl_ct *) obj;
static struct nl_addr *hack = NULL;
if (!hack)
nl_addr_parse("194.88.212.233", AF_INET, &hack);
if (!nl_addr_cmp(hack, nfnl_ct_get_src(ct, 1)) ||
!nl_addr_cmp(hack, nfnl_ct_get_dst(ct, 1))) {
struct nl_dump_params dp = {
.dp_type = NL_DUMP_LINE,
.dp_fd = stdout,
};
printf("UPDATE ");
nl_object_dump(obj, &dp);
}
}
int main(int argc, char *argv[])
{
struct nl_cache_mngr *mngr;
struct nl_sock *sock;
struct nl_cache *ct;
int err;
sock = nl_cli_alloc_socket();
err = nl_cache_mngr_alloc(sock, NETLINK_NETFILTER, NL_AUTO_PROVIDE, &mngr);
if (err < 0) {
nl_perror(err, "nl_cache_mngr_alloc");
return -1;
}
err = nl_cache_mngr_add(mngr, "netfilter/ct", &change_cb, NULL, &ct);
if (err < 0) {
nl_perror(err, "nl_cache_mngr_add(netfilter/ct)");
return -1;
}
for (;;) {
int err = nl_cache_mngr_poll(mngr, 5000);
if (err < 0) {
nl_perror(err, "nl_cache_mngr_poll()");
return -1;
}
}
nl_cache_mngr_free(mngr);
return 0;
}
|
