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test-nf-cache-mngr.c

#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_BRIEF,
                  .dp_fd = stdout,
            };

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

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

      nltool_init(argc, argv);

      handle = nltool_alloc_handle();

      mngr = nl_cache_mngr_alloc(handle, 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;
}

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