nl-link-list.c

/* SPDX-License-Identifier: LGPL-2.1-only */
/*
 * Copyright (c) 2003-2010 Thomas Graf <tgraf@suug.ch>
 */
 
#include <netlink/cli/utils.h>
#include <netlink/cli/link.h>
 
#include <linux/netlink.h>
 
static void print_usage(void)
{
        printf(
"Usage: nl-link-list [OPTIONS]... \n"
"\n"
"OPTIONS\n"
"     --details             Show detailed information of each link\n"
"     --stats               Show statistics, implies --details\n"
" -h, --help                Show this help text.\n"
" -v, --version             Show versioning information.\n"
"\n"
" -n, --name=NAME           Name of link\n"
" -i, --index               Interface index (unique identifier)\n"
"     --family=NAME         Link address family\n"
"     --mtu=NUM             MTU value\n"
"     --txqlen=NUM          TX queue length\n"
"     --weight=NUM          Weight\n"
        );
        exit(0);
}
 
int main(int argc, char *argv[])
{
        struct nl_sock *sock;
        struct nl_cache *link_cache;
        struct rtnl_link *link;
        struct nl_dump_params params = {
                .dp_type = NL_DUMP_LINE,
                .dp_fd = stdout,
        };
 
        sock = nl_cli_alloc_socket();
        nl_cli_connect(sock, NETLINK_ROUTE);
        link = nl_cli_link_alloc();
 
        for (;;) {
                int c, optidx = 0;
                enum {
                        ARG_FAMILY = 257,
                        ARG_MTU = 258,
                        ARG_TXQLEN,
                        ARG_WEIGHT,
                        ARG_DETAILS,
                        ARG_STATS,
                };
                static struct option long_opts[] = {
                        { "details", 0, 0, ARG_DETAILS },
                        { "stats", 0, 0, ARG_STATS },
                        { "help", 0, 0, 'h' },
                        { "version", 0, 0, 'v' },
                        { "name", 1, 0, 'n' },
                        { "index", 1, 0, 'i' },
                        { "family", 1, 0, ARG_FAMILY },
                        { "mtu", 1, 0, ARG_MTU },
                        { "txqlen", 1, 0, ARG_TXQLEN },
                        { "weight", 1, 0, ARG_WEIGHT },
                        { 0, 0, 0, 0 }
                };
 
                c = getopt_long(argc, argv, "hvn:i:", long_opts, &optidx);
                if (c == -1)
                        break;
 
                switch (c) {
                case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
                case ARG_STATS: params.dp_type = NL_DUMP_STATS; 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;
                case ARG_FAMILY: nl_cli_link_parse_family(link, 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;
                }
        }
 
        link_cache = nl_cli_link_alloc_cache_family(sock,
                                rtnl_link_get_family(link));
 
        nl_cache_dump_filter(link_cache, &params, OBJ_CAST(link));
 
        return 0;
}