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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) 2003-2009 Thomas Graf <tgraf@suug.ch>
 */

#include <netlink/cli/utils.h>
#include <netlink/cli/link.h>

static struct nl_sock *sock;
static int quiet = 0;

#if 0
      "  changes := [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");
#endif

static void print_usage(void)
{
      printf(
      "Usage: nl-link-set [OPTION]... [LINK]\n"
      "\n"
      "Options\n"
      " -q, --quiet           Do not print informal notifications\n"
      " -h, --help            Show this help\n"
      " -v, --version         Show versioning information\n"
      "\n"
      "Selecting the Link\n"
      " -n, --name=NAME link name\n"
      " -i, --index           interface index\n"
      "Change Options\n"
      "     --rename=NAME     rename interface\n"
      "     --mtu=NUM         MTU value\n"
      "     --txqlen=NUM      TX queue length\n"
      "     --weight=NUM      weight\n"
      );
      exit(0);
}

static void set_cb(struct nl_object *obj, void *arg)
{
      struct rtnl_link *link = nl_object_priv(obj);
      struct rtnl_link *change = arg;
      struct nl_dump_params params = {
            .dp_type = NL_DUMP_LINE,
            .dp_fd = stdout,
      };
      int err;

      if ((err = rtnl_link_change(sock, link, change, 0) < 0))
            nl_cli_fatal(err, "Unable to change link: %s",
                       nl_geterror(err));

      if (!quiet) {
            printf("Changed ");
            nl_object_dump(OBJ_CAST(link), &params);
      }
}

int main(int argc, char *argv[])
{
      struct nl_cache *link_cache;
      struct rtnl_link *link, *change;
      int ok = 0;

      sock = nl_cli_alloc_socket();
      nl_cli_connect(sock, NETLINK_ROUTE);
      link_cache = nl_cli_link_alloc_cache(sock);
      link = nl_cli_link_alloc();
      change = nl_cli_link_alloc();

      for (;;) {
            int c, optidx = 0;
            enum {
                  ARG_RENAME = 257,
                  ARG_MTU = 258,
                  ARG_TXQLEN,
                  ARG_WEIGHT,
            };
            static struct option long_opts[] = {
                  { "quiet", 0, 0, 'q' },
                  { "help", 0, 0, 'h' },
                  { "version", 0, 0, 'v' },
                  { "name", 1, 0, 'n' },
                  { "index", 1, 0, 'i' },
                  { "rename", 1, 0, ARG_RENAME },
                  { "mtu", 1, 0, ARG_MTU },
                  { "txqlen", 1, 0, ARG_TXQLEN },
                  { "weight", 1, 0, ARG_WEIGHT },
                  { 0, 0, 0, 0 }
            };

            c = getopt_long(argc, argv, "qhvn:i:", long_opts, &optidx);
            if (c == -1)
                  break;

            switch (c) {
            case 'q': quiet = 1; break;
            case 'h': print_usage(); break;
            case 'v': nl_cli_print_version(); break;
            case 'n': ok++; nl_cli_link_parse_name(link, optarg); break;
            case 'i': ok++; nl_cli_link_parse_ifindex(link, optarg); break;
            case ARG_RENAME: nl_cli_link_parse_name(change, optarg); break;
            case ARG_MTU: nl_cli_link_parse_mtu(link, optarg); break;
            case ARG_TXQLEN: nl_cli_link_parse_txqlen(link, optarg); break;
            case ARG_WEIGHT: nl_cli_link_parse_weight(link, optarg); break;
            }
      }

      if (!ok)
            print_usage();

      nl_cache_foreach_filter(link_cache, OBJ_CAST(link), set_cb, change);

      return 0;
}

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