/*
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* Test for the filter API
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
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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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static int n = 0;
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char buf[1024];
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nfct_snprintf(buf, sizeof(buf), ct, type, NFCT_O_PLAIN, NFCT_OF_TIME);
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printf("%s\n", buf);
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if (++n == 10)
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return NFCT_CB_STOP;
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return NFCT_CB_CONTINUE;
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}
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int main(void)
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{
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int i, ret;
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struct nfct_handle *h;
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struct nfct_filter *filter;
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h = nfct_open(CONNTRACK, NF_NETLINK_CONNTRACK_NEW |
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NF_NETLINK_CONNTRACK_UPDATE);
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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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filter = nfct_filter_create();
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if (!filter) {
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perror("nfct_create_filter");
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return 0;
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}
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if (nfct_filter_attach(nfct_fd(h), filter) == -1) {
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perror("nfct_filter_attach");
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return 0;
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}
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/* protocol 255 is skipped since we support up to 255 protocols max */
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for (i=0; i<IPPROTO_MAX; i++)
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nfct_filter_add_attr_u32(filter,NFCT_FILTER_L4PROTO,i);
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/* up to 127 IP addresses, above that adding is noop */
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for (i=0; i<128; i++) {
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/* BSF always wants data in host-byte order */
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struct nfct_filter_ipv4 fltr_ipv4 = {
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.addr = ntohl(inet_addr("127.0.0.1")) + i,
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.mask = 0xffffffff,
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};
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nfct_filter_add_attr(filter, NFCT_FILTER_SRC_IPV4, &fltr_ipv4);
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};
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if (nfct_filter_attach(nfct_fd(h), filter) == -1) {
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perror("nfct_filter_attach");
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return 0;
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}
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nfct_filter_destroy(filter);
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nfct_callback_register(h, NFCT_T_ALL, event_cb, NULL);
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ret = nfct_catch(h);
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printf("test ret=%d (%s)\n", ret, strerror(errno));
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return EXIT_SUCCESS;
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}
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