libnetfilter_conntrack  1.0.6
conntrack_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  nfct_set_attr_u8(ct, ATTR_L3PROTO, AF_INET);
23  nfct_set_attr_u32(ct, ATTR_IPV4_SRC, inet_addr("1.1.1.1"));
24  nfct_set_attr_u32(ct, ATTR_IPV4_DST, inet_addr("2.2.2.2"));
25 
26  nfct_set_attr_u8(ct, ATTR_L4PROTO, IPPROTO_TCP);
27  nfct_set_attr_u16(ct, ATTR_PORT_SRC, htons(20));
28  nfct_set_attr_u16(ct, ATTR_PORT_DST, htons(10));
29 
30  nfct_setobjopt(ct, NFCT_SOPT_SETUP_REPLY);
31 
32  nfct_set_attr_u8(ct, ATTR_TCP_STATE, TCP_CONNTRACK_SYN_SENT);
33  nfct_set_attr_u32(ct, ATTR_TIMEOUT, 100);
34 
35  h = nfct_open(CONNTRACK, 0);
36  if (!h) {
37  perror("nfct_open");
38  nfct_destroy(ct);
39  return -1;
40  }
41 
42  ret = nfct_query(h, NFCT_Q_CREATE, ct);
43 
44  printf("TEST: create conntrack ");
45  if (ret == -1)
46  printf("(%d)(%s)\n", ret, strerror(errno));
47  else
48  printf("(OK)\n");
49 
50  nfct_close(h);
51 
52  nfct_destroy(ct);
53 
54  ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
55 }
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)
int nfct_close(struct nfct_handle *cth)
Definition: main.c:105
void nfct_destroy(struct nf_conntrack *ct)
Definition: conntrack/api.c:92
int nfct_setobjopt(struct nf_conntrack *ct, unsigned int option)
void nfct_set_attr_u16(struct nf_conntrack *ct, const enum nf_conntrack_attr type, uint16_t value)
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