libnetfilter_conntrack  1.0.6
expect_events.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <errno.h>
5 
6 #include <libnetfilter_conntrack/libnetfilter_conntrack.h>
7 
8 static int event_cb(enum nf_conntrack_msg_type type,
9  struct nf_expect *exp,
10  void *data)
11 {
12  static int n = 0;
13  char buf[1024];
14 
15  nfexp_snprintf(buf, 1024, exp, type, NFCT_O_XML, 0);
16  printf("%s\n", buf);
17 
18  if (++n == 10)
19  return NFCT_CB_STOP;
20 
21  return NFCT_CB_CONTINUE;
22 }
23 
24 int main(void)
25 {
26  int ret;
27  struct nfct_handle *h;
28 
29  h = nfct_open(EXPECT, NF_NETLINK_CONNTRACK_EXP_NEW |
30  NF_NETLINK_CONNTRACK_EXP_UPDATE |
31  NF_NETLINK_CONNTRACK_EXP_DESTROY);
32  if (!h) {
33  perror("nfct_open");
34  return -1;
35  }
36 
37  nfexp_callback_register(h, NFCT_T_ALL, event_cb, NULL);
38 
39  printf("TEST: waiting for 10 expectation events...\n");
40 
41  ret = nfexp_catch(h);
42 
43  printf("TEST: expectation events ");
44  if (ret == -1)
45  printf("(%d)(%s)\n", ret, strerror(errno));
46  else
47  printf("(OK)\n");
48 
49  nfct_close(h);
50 
51  ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
52 }
int nfct_close(struct nfct_handle *cth)
Definition: main.c:105
int nfexp_snprintf(char *buf, unsigned int size, const struct nf_expect *exp, const unsigned int msg_type, const unsigned int out_type, const unsigned int out_flags)
Definition: expect/api.c:774
int nfexp_callback_register(struct nfct_handle *h, enum nf_conntrack_msg_type type, int(*cb)(enum nf_conntrack_msg_type type, struct nf_expect *exp, void *data), void *data)
Definition: expect/api.c:157
int nfexp_catch(struct nfct_handle *h)
Definition: expect/api.c:733
struct nfct_handle * nfct_open(uint8_t, unsigned)
Definition: main.c:84