libnetfilter_conntrack  1.0.6
conntrack_grp_create.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <errno.h>
5 #include <arpa/inet.h>
6 
7 #include <libnetfilter_conntrack/libnetfilter_conntrack.h>
8 #include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h>
9 
10 int main(void)
11 {
12  int ret;
13  struct nfct_handle *h;
14  struct nf_conntrack *ct;
15 
16  ct = nfct_new();
17  if (!ct) {
18  perror("nfct_new");
19  return 0;
20  }
21 
22  struct nfct_attr_grp_ipv4 grp_ipv4 = {
23  .src = inet_addr("1.1.1.1"),
24  .dst = inet_addr("2.2.2.2")
25  };
26  nfct_set_attr_grp(ct, ATTR_GRP_ORIG_IPV4, &grp_ipv4);
27 
28  struct nfct_attr_grp_port grp_port = {
29  .sport = htons(20),
30  .dport = htons(10)
31  };
32  nfct_set_attr_grp(ct, ATTR_GRP_ORIG_PORT, &grp_port);
33  nfct_set_attr_u8(ct, ATTR_L4PROTO, IPPROTO_TCP);
34 
35  nfct_setobjopt(ct, NFCT_SOPT_SETUP_REPLY);
36 
37  nfct_set_attr_u8(ct, ATTR_TCP_STATE, TCP_CONNTRACK_SYN_SENT);
38  nfct_set_attr_u32(ct, ATTR_TIMEOUT, 100);
39  nfct_set_attr(ct, ATTR_HELPER_NAME, "ftp");
40 
41  h = nfct_open(CONNTRACK, 0);
42  if (!h) {
43  perror("nfct_open");
44  nfct_destroy(ct);
45  return -1;
46  }
47 
48  ret = nfct_query(h, NFCT_Q_CREATE, ct);
49 
50  printf("TEST: create conntrack ");
51  if (ret == -1)
52  printf("(%d)(%s)\n", ret, strerror(errno));
53  else
54  printf("(OK)\n");
55 
56  nfct_close(h);
57 
58  nfct_destroy(ct);
59 
60  ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
61 }
void nfct_set_attr_u32(struct nf_conntrack *ct, const enum nf_conntrack_attr type, uint32_t value)
int nfct_query(struct nfct_handle *h, const enum nf_conntrack_query query, const void *data)
void nfct_set_attr(struct nf_conntrack *ct, const enum nf_conntrack_attr type, const void *value)
int nfct_close(struct nfct_handle *cth)
Definition: main.c:105
void nfct_destroy(struct nf_conntrack *ct)
Definition: conntrack/api.c:92
void nfct_set_attr_grp(struct nf_conntrack *ct, const enum nf_conntrack_attr_grp type, const void *value)
int nfct_setobjopt(struct nf_conntrack *ct, unsigned int option)
struct nf_conntrack * nfct_new(void)
Definition: conntrack/api.c:75
void nfct_set_attr_u8(struct nf_conntrack *ct, const enum nf_conntrack_attr type, uint8_t value)
struct nfct_handle * nfct_open(uint8_t, unsigned)
Definition: main.c:84