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#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h>
int main()
{
int ret;
struct nfct_handle *h;
struct nf_conntrack *ct;
ct = nfct_new();
if (!ct) {
perror("nfct_new");
return 0;
}
struct nfct_attr_grp_ipv4 grp_ipv4 = {
.src = inet_addr("1.1.1.1"),
.dst = inet_addr("2.2.2.2")
};
nfct_set_attr_grp(ct, ATTR_GRP_ORIG_IPV4, &grp_ipv4);
struct nfct_attr_grp_port grp_port = {
.sport = htons(20),
.dport = htons(10)
};
nfct_set_attr_grp(ct, ATTR_GRP_ORIG_PORT, &grp_port);
nfct_set_attr_u8(ct, ATTR_L4PROTO, IPPROTO_TCP);
nfct_setobjopt(ct, NFCT_SOPT_SETUP_REPLY);
nfct_set_attr_u8(ct, ATTR_TCP_STATE, TCP_CONNTRACK_LISTEN);
nfct_set_attr_u32(ct, ATTR_TIMEOUT, 100);
nfct_set_attr(ct, ATTR_HELPER_NAME, "ftp");
h = nfct_open(CONNTRACK, 0);
if (!h) {
perror("nfct_open");
return -1;
}
ret = nfct_query(h, NFCT_Q_CREATE, ct);
printf("TEST: create conntrack (%d)(%s)\n", ret, strerror(errno));
if (ret == -1)
exit(EXIT_FAILURE);
nfct_close(h);
}
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