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nl-fib-lookup.c

/*
 * src/nl-fib-lookup.c        FIB Route Lookup
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation version 2.1
 *    of the License.
 *
 * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
 */

#include "utils.h"

static void print_usage(void)
{
      printf(
      "Usage: nl-fib-lookup [options] <addr>\n"
      "Options:\n"
      "   -t, --table <table>       Table id\n"
      "   -f, --fwmark <int>        Firewall mark\n"
      "   -s, --scope <scope>       Routing scope\n"
      "   -T, --tos <int>           Type of Service\n");
      exit(1);
}

int main(int argc, char *argv[])
{
      struct nl_handle *nlh;
      struct nl_cache *result;
      struct flnl_request *request;
      struct nl_addr *addr;
      struct nl_dump_params params = {
            .dp_fd = stdout,
            .dp_type = NL_DUMP_FULL,
      };
      int table = RT_TABLE_UNSPEC, scope = RT_SCOPE_UNIVERSE;
      int tos = 0, err = 1;
      uint64_t fwmark = 0;

      if (nltool_init(argc, argv) < 0)
            return -1;

      while (1) {
            static struct option long_opts[] = {
                  {"table", 1, 0, 't'},
                  {"fwmark", 1, 0, 'f'},
                  {"scope", 1, 0, 's'},
                  {"tos", 1, 0, 'T'},
                  {"help", 0, 0, 'h'},
                  {0, 0, 0, 0},
            };
            int c, idx = 0;

            c = getopt_long(argc, argv, "t:f:s:T:h", long_opts, &idx);
            if (c == -1)
                  break;

            switch (c) {
            case 't':
                  table = strtoul(optarg, NULL, 0);
                  break;
            case 'f':
                  fwmark = strtoul(optarg, NULL, 0);
                  break;
            case 's':
                  scope = strtoul(optarg, NULL, 0);
                  break;
            case 'T':
                  tos = strtoul(optarg, NULL, 0);
                  break;
            default:
                  print_usage();
            }
      }

      if (optind >= argc)
            print_usage();

      nlh = nl_handle_alloc_nondefault(nltool_cbset);
      if (!nlh)
            return -1;

      addr = nl_addr_parse(argv[optind], AF_INET);
      if (!addr) {
            fprintf(stderr, "Unable to parse address \"%s\": %s\n",
                  argv[optind], nl_geterror());
            goto errout;
      }

      result = flnl_result_alloc_cache();
      if (!result)
            goto errout_addr;

      request = flnl_request_alloc();
      if (!request)
            goto errout_result;

      flnl_request_set_table(request, table);
      flnl_request_set_fwmark(request, fwmark);
      flnl_request_set_scope(request, scope);
      flnl_request_set_tos(request, tos);

      err = flnl_request_set_addr(request, addr);
      nl_addr_put(addr);
      if (err < 0)
            goto errout_put;

      if (nltool_connect(nlh, NETLINK_FIB_LOOKUP) < 0)
            goto errout_put;

      err = flnl_lookup(nlh, request, result);
      if (err < 0) {
            fprintf(stderr, "Unable to lookup: %s\n", nl_geterror());
            goto errout_put;
      }

      nl_cache_dump(result, &params);

      err = 0;
errout_put:
      flnl_request_put(request);
errout_result:
      nl_cache_free(result);
errout_addr:
      nl_addr_put(addr);
errout:
      nl_close(nlh);
      nl_handle_destroy(nlh);
      return err;
}

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