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;
}