nfct-helper-add.c
/* This example is in the public domain. */
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <netinet/in.h>
#include <libmnl/libmnl.h>
#include <libnetfilter_cthelper/libnetfilter_cthelper.h>
int main(int argc, char *argv[])
{
struct mnl_socket *nl;
char buf[MNL_SOCKET_BUFFER_SIZE];
struct nlmsghdr *nlh;
uint32_t portid, seq;
struct nfct_helper *nfct_helper;
struct nfct_helper_policy *p;
int ret;
if (argc != 3) {
printf("Usage: %s [helper-name] [queue-num]\n", argv[0]);
exit(EXIT_FAILURE);
}
nfct_helper = nfct_helper_alloc();
if (nfct_helper == NULL) {
perror("OOM");
exit(EXIT_FAILURE);
}
nfct_helper_attr_set(nfct_helper, NFCTH_ATTR_NAME, argv[1]);
nfct_helper_attr_set_u32(nfct_helper, NFCTH_ATTR_QUEUE_NUM, atoi(argv[2]));
nfct_helper_attr_set_u16(nfct_helper, NFCTH_ATTR_PROTO_L3NUM, AF_INET);
nfct_helper_attr_set_u8(nfct_helper, NFCTH_ATTR_PROTO_L4NUM, IPPROTO_TCP);
p = nfct_helper_policy_alloc();
if (p == NULL) {
perror("OOM");
exit(EXIT_FAILURE);
}
nfct_helper_policy_attr_set(p, NFCTH_ATTR_POLICY_NAME, "test");
nfct_helper_policy_attr_set_u32(p, NFCTH_ATTR_POLICY_TIMEOUT, 100);
nfct_helper_policy_attr_set_u32(p, NFCTH_ATTR_POLICY_MAX, 100);
nfct_helper_attr_set(nfct_helper, NFCTH_ATTR_POLICY, p);
seq = time(NULL);
nlh = nfct_helper_nlmsg_build_hdr(buf, NFNL_MSG_CTHELPER_NEW,
NLM_F_CREATE | NLM_F_ACK, seq);
nfct_helper_nlmsg_build_payload(nlh, nfct_helper);
nfct_helper_free(nfct_helper);
nfct_helper_policy_free(p);
nl = mnl_socket_open(NETLINK_NETFILTER);
if (nl == NULL) {
perror("mnl_socket_open");
exit(EXIT_FAILURE);
}
if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
perror("mnl_socket_bind");
exit(EXIT_FAILURE);
}
portid = mnl_socket_get_portid(nl);
if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
perror("mnl_socket_send");
exit(EXIT_FAILURE);
}
ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
while (ret > 0) {
ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL);
if (ret <= 0)
break;
ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
}
if (ret == -1) {
perror("error");
exit(EXIT_FAILURE);
}
mnl_socket_close(nl);
return EXIT_SUCCESS;
}
nfct_helper_policy_alloc
struct nfct_helper_policy * nfct_helper_policy_alloc(void)
Definition: libnetfilter_cthelper.c:130
nfct_helper_policy_free
void nfct_helper_policy_free(struct nfct_helper_policy *p)
Definition: libnetfilter_cthelper.c:140
nfct_helper_policy_attr_set
void nfct_helper_policy_attr_set(struct nfct_helper_policy *p, enum nfct_helper_policy_attr_type type, const void *data)
Definition: libnetfilter_cthelper.c:153
nfct_helper_alloc
struct nfct_helper * nfct_helper_alloc(void)
Definition: libnetfilter_cthelper.c:102
nfct_helper_attr_set
void nfct_helper_attr_set(struct nfct_helper *nfct_helper, enum nfct_helper_attr_type type, const void *data)
Definition: libnetfilter_cthelper.c:206
nfct_helper_free
void nfct_helper_free(struct nfct_helper *h)
Definition: libnetfilter_cthelper.c:112
nfct_helper_nlmsg_build_payload
void nfct_helper_nlmsg_build_payload(struct nlmsghdr *nlh, struct nfct_helper *nfct_helper)
Definition: libnetfilter_cthelper.c:534
nfct_helper_nlmsg_build_hdr
struct nlmsghdr * nfct_helper_nlmsg_build_hdr(char *buf, uint8_t cmd, uint16_t flags, uint32_t seq)
Definition: libnetfilter_cthelper.c:494
nfct_helper_policy
Definition: libnetfilter_cthelper.c:68
nfct_helper
Definition: libnetfilter_cthelper.c:75