libnetfilter_conntrack  1.0.6
ct_events_reliable.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <signal.h>
5 #include <errno.h>
6 
7 #include <libnetfilter_conntrack/libnetfilter_conntrack.h>
8 
9 static int events = 0;
10 static int new, update, destroy;
11 
12 static int event_cb(enum nf_conntrack_msg_type type,
13  struct nf_conntrack *ct,
14  void *data)
15 {
16  if (type == NFCT_T_NEW)
17  new++;
18  else if (type == NFCT_T_UPDATE)
19  update++;
20  else if (type == NFCT_T_DESTROY)
21  destroy++;
22 
23  if ((++events % 10000) == 0)
24  printf("%d events received (%d new, %d update, %d destroy)\n",
25  events, new, update, destroy);
26 
27  return NFCT_CB_CONTINUE;
28 }
29 
30 static void sighandler(int foo)
31 {
32  printf("%d events received (%d new, %d update, %d destroy)\n",
33  events, new, update, destroy);
34  exit(EXIT_SUCCESS);
35 }
36 
37 int main(void)
38 {
39  int ret;
40  struct nfct_handle *h;
41  int on = 1;
42 
43  signal(SIGINT, sighandler);
44 
45  h = nfct_open(CONNTRACK, NFCT_ALL_CT_GROUPS);
46  if (!h) {
47  perror("nfct_open");
48  return 0;
49  }
50 
51  setsockopt(nfct_fd(h), SOL_NETLINK,
52  NETLINK_BROADCAST_SEND_ERROR, &on, sizeof(int));
53  setsockopt(nfct_fd(h), SOL_NETLINK,
54  NETLINK_NO_ENOBUFS, &on, sizeof(int));
55 
56  nfct_callback_register(h, NFCT_T_ALL, event_cb, NULL);
57 
58  printf("TEST: waiting for events...\n");
59 
60  ret = nfct_catch(h);
61 
62  printf("TEST: conntrack events ");
63  if (ret == -1)
64  printf("(%d)(%s)\n", ret, strerror(errno));
65  else
66  printf("(OK)\n");
67 
68  nfct_close(h);
69 
70  ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
71 }
int nfct_close(struct nfct_handle *cth)
Definition: main.c:105
int nfct_fd(struct nfct_handle *cth)
Definition: main.c:144
int nfct_callback_register(struct nfct_handle *h, enum nf_conntrack_msg_type type, int(*cb)(enum nf_conntrack_msg_type type, struct nf_conntrack *ct, void *data), void *data)
int nfct_catch(struct nfct_handle *h)
struct nfct_handle * nfct_open(uint8_t, unsigned)
Definition: main.c:84