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nl-link-stats.c

/*
 * src/nl-link-stats.c     Retrieve link statistics
 *
 *    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 void print_usage(void)
{
      printf(
      "Usage: nl-link-stats [OPTION]... [LINK] [ListOfStats]\n"
      "\n"
      "Options\n"
      " -l, --list            List available statistic names\n"
      " -h, --help            Show this help\n"
      " -v, --version         Show versioning information\n"
      "\n"
      "Link Options\n"
      " -n, --name=NAME link name\n"
      " -i, --index=NUM       interface index\n"
      );
      exit(0);
}

static void list_stat_names(void)
{
      char buf[64];
      int i;

      for (i = 0; i < RTNL_LINK_STATS_MAX; i++)
            printf("%s\n", rtnl_link_stat2str(i, buf, sizeof(buf)));

      exit(0);
}

static int gargc;

static void dump_stat(struct rtnl_link *link, int id)
{
      uint64_t st = rtnl_link_get_stat(link, id);
      char buf[64];

      printf("%s.%s %" PRIu64 "\n", rtnl_link_get_name(link),
             rtnl_link_stat2str(id, buf, sizeof(buf)), st);
}

static void dump_stats(struct nl_object *obj, void *arg)
{
      struct rtnl_link *link = (struct rtnl_link *) obj;
      char **argv = arg;

      if (optind >= gargc) {
            int i;

            for (i = 0; i < RTNL_LINK_STATS_MAX; i++)
                  dump_stat(link, i);
      } else {
            while (optind < gargc) {
                  int id = rtnl_link_str2stat(argv[optind]);

                  if (id < 0)
                        fprintf(stderr, "Warning: Unknown statistic "
                              "\"%s\"\n", argv[optind]);
                  else
                        dump_stat(link, id);

                  optind++;
            }
      }
}

int main(int argc, char *argv[])
{
      struct nl_sock *sock;
      struct nl_cache *link_cache;
      struct rtnl_link *link;

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

      for (;;) {
            int c, optidx = 0;
            static struct option long_opts[] = {
                  { "list", 0, 0, 'l' },
                  { "help", 0, 0, 'h' },
                  { "version", 0, 0, 'v' },
                  { "name", 1, 0, 'n' },
                  { "index", 1, 0, 'i' },
                  { 0, 0, 0, 0 }
            };

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

            switch (c) {
            case 'l': list_stat_names(); break;
            case 'h': print_usage(); break;
            case 'v': nl_cli_print_version(); break;
            case 'n': nl_cli_link_parse_name(link, optarg); break;
            case 'i': nl_cli_link_parse_ifindex(link, optarg); break;
            }
      }

      gargc = argc;
      nl_cache_foreach_filter(link_cache, OBJ_CAST(link), dump_stats, argv);

      return 0;
}


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