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