1 #include <netlink/cli/utils.h>
2
3 #include <linux/netlink.h>
4
change_cb(struct nl_cache * cache,struct nl_object * obj,int action,void * data)5 static void change_cb(struct nl_cache *cache, struct nl_object *obj,
6 int action, void *data)
7 {
8 struct nfnl_ct *ct = (struct nfnl_ct *) obj;
9 static struct nl_addr *hack = NULL;
10
11 if (!hack)
12 nl_addr_parse("194.88.212.233", AF_INET, &hack);
13
14 if (!nl_addr_cmp(hack, nfnl_ct_get_src(ct, 1)) ||
15 !nl_addr_cmp(hack, nfnl_ct_get_dst(ct, 1))) {
16 struct nl_dump_params dp = {
17 .dp_type = NL_DUMP_LINE,
18 .dp_fd = stdout,
19 };
20
21 printf("UPDATE ");
22 nl_object_dump(obj, &dp);
23 }
24 }
25
main(int argc,char * argv[])26 int main(int argc, char *argv[])
27 {
28 struct nl_cache_mngr *mngr;
29 struct nl_sock *sock;
30 struct nl_cache *ct;
31 int err;
32
33 sock = nl_cli_alloc_socket();
34
35 err = nl_cache_mngr_alloc(sock, NETLINK_NETFILTER, NL_AUTO_PROVIDE, &mngr);
36 if (err < 0) {
37 nl_perror(err, "nl_cache_mngr_alloc");
38 return -1;
39 }
40
41 err = nl_cache_mngr_add(mngr, "netfilter/ct", &change_cb, NULL, &ct);
42 if (err < 0) {
43 nl_perror(err, "nl_cache_mngr_add(netfilter/ct)");
44 return -1;
45 }
46
47 for (;;) {
48 int err = nl_cache_mngr_poll(mngr, 5000);
49 if (err < 0) {
50 nl_perror(err, "nl_cache_mngr_poll()");
51 return -1;
52 }
53
54 }
55
56 nl_cache_mngr_free(mngr);
57
58 return 0;
59 }
60