nexmon – Rev 1

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#include "../src/utils.h"

static void change_cb(struct nl_cache *cache, struct nl_object *obj,
                      int action)
{
        struct nfnl_ct *ct = (struct nfnl_ct *) obj;
        static struct nl_addr *hack = NULL;

        if (!hack)
                hack = nl_addr_parse("194.88.212.233", AF_INET);

        if (!nl_addr_cmp(hack, nfnl_ct_get_src(ct, 1)) ||
            !nl_addr_cmp(hack, nfnl_ct_get_dst(ct, 1))) {
                struct nl_dump_params dp = {
                        .dp_type = NL_DUMP_LINE,
                        .dp_fd = stdout,
                };

                printf("UPDATE ");
                nl_object_dump(obj, &dp);
        }
}

int main(int argc, char *argv[])
{
        struct nl_cache_mngr *mngr;
        struct nl_sock *sock;
        struct nl_cache *ct;

        sock = nlt_socket_alloc();

        mngr = nl_cache_mngr_alloc(sock, NETLINK_NETFILTER, NL_AUTO_PROVIDE);
        if (!mngr) {
                nl_perror("nl_cache_mngr_alloc");
                return -1;
        }

        ct = nl_cache_mngr_add(mngr, "netfilter/ct", &change_cb);
        if (ct == NULL) {
                nl_perror("nl_cache_mngr_add(netfilter/ct)");
                return -1;
        }

        for (;;) {
                int err = nl_cache_mngr_poll(mngr, 5000);
                if (err < 0) {
                        nl_perror("nl_cache_mngr_poll()");
                        return -1;
                }

        }

        nl_cache_mngr_free(mngr);

        return 0;
}