nl-route-list.c

/* SPDX-License-Identifier: LGPL-2.1-only */
/*
 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
 */
 
#include <netlink/cli/utils.h>
#include <netlink/cli/route.h>
#include <netlink/cli/link.h>
 
#include <linux/netlink.h>
 
static void print_usage(void)
{
        printf(
        "Usage: nl-route-list [OPTION]... [ROUTE]\n"
        "\n"
        "Options\n"
        " -c, --cache           List the contents of the route cache\n"
        " -f, --format=TYPE     Output format { brief | details | stats }\n"
        " -h, --help            Show this help\n"
        " -v, --version         Show versioning information\n"
        "\n"
        "Route Options\n"
        " -d, --dst=ADDR        destination prefix, e.g. 10.10.0.0/16\n"
        " -n, --nexthop=NH      nexthop configuration:\n"
        "                         dev=DEV         route via device\n"
        "                         weight=WEIGHT   weight of nexthop\n"
        "                         flags=FLAGS\n"
        "                         via=GATEWAY     route via other node\n"
        "                         realms=REALMS\n"
        "                         e.g. dev=eth0,via=192.168.1.12\n"
        " -t, --table=TABLE     Routing table\n"
        "     --family=FAMILY   Address family\n"
        "     --src=ADDR        Source prefix\n"
        "     --iif=DEV         Incomming interface\n"
        "     --pref-src=ADDR   Preferred source address\n"
        "     --metrics=OPTS    Metrics configurations\n"
        "     --priority=NUM    Priotity\n"
        "     --scope=SCOPE     Scope\n"
        "     --protocol=PROTO  Protocol\n"
        "     --type=TYPE       { unicast | local | broadcast | multicast }\n"
        );
        exit(0);
}
 
int main(int argc, char *argv[])
{
        struct nl_sock *sock;
        struct nl_cache *link_cache, *route_cache;
        struct rtnl_route *route;
        struct nl_dump_params params = {
                .dp_fd = stdout,
                .dp_type = NL_DUMP_LINE,
        };
        int print_cache = 0;
 
        sock = nl_cli_alloc_socket();
        nl_cli_connect(sock, NETLINK_ROUTE);
        link_cache = nl_cli_link_alloc_cache(sock);
        route = nl_cli_route_alloc();
 
        for (;;) {
                int c, optidx = 0;
                enum {
                        ARG_FAMILY = 257,
                        ARG_SRC = 258,
                        ARG_IIF,
                        ARG_PREF_SRC,
                        ARG_METRICS,
                        ARG_PRIORITY,
                        ARG_SCOPE,
                        ARG_PROTOCOL,
                        ARG_TYPE,
                };
                static struct option long_opts[] = {
                        { "cache", 0, 0, 'c' },
                        { "format", 1, 0, 'f' },
                        { "help", 0, 0, 'h' },
                        { "version", 0, 0, 'v' },
                        { "dst", 1, 0, 'd' },
                        { "nexthop", 1, 0, 'n' },
                        { "table", 1, 0, 't' },
                        { "family", 1, 0, ARG_FAMILY },
                        { "src", 1, 0, ARG_SRC },
                        { "iif", 1, 0, ARG_IIF },
                        { "pref-src", 1, 0, ARG_PREF_SRC },
                        { "metrics", 1, 0, ARG_METRICS },
                        { "priority", 1, 0, ARG_PRIORITY },
                        { "scope", 1, 0, ARG_SCOPE },
                        { "protocol", 1, 0, ARG_PROTOCOL },
                        { "type", 1, 0, ARG_TYPE },
                        { 0, 0, 0, 0 }
                };
 
                c = getopt_long(argc, argv, "cf:hvd:n:t:", long_opts, &optidx);
                if (c == -1)
                        break;
 
                switch (c) {
                case 'c': print_cache = 1; break;
                case 'f': params.dp_type = nl_cli_parse_dumptype(optarg); break;
                case 'h': print_usage(); break;
                case 'v': nl_cli_print_version(); break;
                case 'd': nl_cli_route_parse_dst(route, optarg); break;
                case 'n': nl_cli_route_parse_nexthop(route, optarg, link_cache); break;
                case 't': nl_cli_route_parse_table(route, optarg); break;
                case ARG_FAMILY: nl_cli_route_parse_family(route, optarg); break;
                case ARG_SRC: nl_cli_route_parse_src(route, optarg); break;
                case ARG_IIF: nl_cli_route_parse_iif(route, optarg, link_cache); break;
                case ARG_PREF_SRC: nl_cli_route_parse_pref_src(route, optarg); break;
                case ARG_METRICS: nl_cli_route_parse_metric(route, optarg); break;
                case ARG_PRIORITY: nl_cli_route_parse_prio(route, optarg); break;
                case ARG_SCOPE: nl_cli_route_parse_scope(route, optarg); break;
                case ARG_PROTOCOL: nl_cli_route_parse_protocol(route, optarg); break;
                case ARG_TYPE: nl_cli_route_parse_type(route, optarg); break;
                }
        }
 
        route_cache = nl_cli_route_alloc_cache(sock,
                                print_cache ? ROUTE_CACHE_CONTENT : 0);
 
        nl_cache_dump_filter(route_cache, &params, OBJ_CAST(route));
 
        return 0;
}