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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
static int events = 0;
static int new, update, destroy;
static int event_cb(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct,
void *data)
{
if (type == NFCT_T_NEW)
new++;
if (type == NFCT_T_UPDATE)
update++;
else if (type == NFCT_T_DESTROY)
destroy++;
if ((++events % 10000) == 0)
printf("%d events received (%d new, %d update, %d destroy)\n",
events, new, update, destroy);
return NFCT_CB_CONTINUE;
}
static void sighandler(int foo)
{
printf("%d events received (%d new, %d update, %d destroy)\n",
events, new, update, destroy);
exit(EXIT_SUCCESS);
}
int main(void)
{
int ret;
struct nfct_handle *h;
int on = 1;
signal(SIGINT, sighandler);
h = nfct_open(CONNTRACK, NFCT_ALL_CT_GROUPS);
if (!h) {
perror("nfct_open");
return 0;
}
setsockopt(nfct_fd(h), SOL_NETLINK,
NETLINK_BROADCAST_SEND_ERROR, &on, sizeof(int));
setsockopt(nfct_fd(h), SOL_NETLINK,
NETLINK_NO_ENOBUFS, &on, sizeof(int));
nfct_callback_register(h, NFCT_T_ALL, event_cb, NULL);
printf("TEST: waiting for events...\n");
ret = nfct_catch(h);
printf("TEST: conntrack events ");
if (ret == -1)
printf("(%d)(%s)\n", ret, strerror(errno));
else
printf("(OK)\n");
nfct_close(h);
ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
}
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