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Sourcecode: libnl version File versions

nl-link-set.c

/*
 * src/nl-link-set.c     Set link attributes
 *
 *    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-link-set <ifindex> <changes>\n"
      "  changes := [dev DEV] [mtu MTU] [txqlen TXQLEN] [weight WEIGHT] [link LINK]\n"
      "             [master MASTER] [qdisc QDISC] [addr ADDR] [broadcast BRD]\n"
      "             [{ up | down }] [{ arp | noarp }] [{ promisc | nopromisc }]\n"
      "             [{ dynamic | nodynamic }] [{ multicast | nomulticast }]\n"
      "             [{ trailers | notrailers }] [{ allmulticast | noallmulticast }]\n");
      exit(1);
}

#include "f_link.c"

int main(int argc, char *argv[])
{
      struct nl_handle *nlh;
      struct nl_cache *link_cache;
      struct rtnl_link *link, *orig;
      int err = 1, ifindex;

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

      if (argc < 2 || !strcmp(argv[1], "-h"))
            print_usage();

      nlh = nltool_alloc_handle();
      if (!nlh)
            return -1;

      link = rtnl_link_alloc();
      if (!link)
            goto errout;

      if (nltool_connect(nlh, NETLINK_ROUTE) < 0)
            goto errout_free;

      link_cache = nltool_alloc_link_cache(nlh);
      if (!link_cache)
            goto errout_close;

      ifindex = strtoul(argv[1], NULL, 0);

      if (!(orig = rtnl_link_get(link_cache, ifindex))) {
            fprintf(stderr, "Interface index %d does not exist\n", ifindex);
            goto errout_cache;
      }

      get_filter(link, argc, argv, 2, link_cache);

      if (rtnl_link_change(nlh, orig, link, 0) < 0) {
            fprintf(stderr, "Unable to change link: %s\n", nl_geterror());
            goto errout_put;
      }

      err = 0;

errout_put:
      rtnl_link_put(orig);
errout_cache:
      nl_cache_free(link_cache);
errout_close:
      nl_close(nlh);
errout_free:
      rtnl_link_put(link);
errout:
      nl_handle_destroy(nlh);
      return err;
}

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