nl-route-delete.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 int interactive = 0, default_yes = 0, quiet = 0;
static int deleted = 0;
static struct nl_sock *sock;
 
static void print_version(void)
{
        fprintf(stderr, "%s\n", LIBNL_STRING);
        exit(0);
}
 
static void print_usage(void)
{
        printf(
        "Usage: nl-route-delete [OPTION]... [ROUTE]\n"
        "\n"
        "Options\n"
        " -i, --interactive     Run interactively\n"
        "     --yes             Set default answer to yes\n"
        " -q, --quiet           Do not print informal notifications\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);
}
 
static void delete_cb(struct nl_object *obj, void *arg)
{
        struct rtnl_route *route = (struct rtnl_route *) obj;
        struct nl_dump_params params = {
                .dp_type = NL_DUMP_LINE,
                .dp_fd = stdout,
        };
        int err;
 
        if (interactive && !nl_cli_confirm(obj, &params, default_yes))
                return;
 
        if ((err = rtnl_route_delete(sock, route, 0)) < 0)
                nl_cli_fatal(err, "Unable to delete route: %s", nl_geterror(err));
 
        if (!quiet) {
                printf("Deleted ");
                nl_object_dump(obj, &params);
        }
 
        deleted++;
}
 
int main(int argc, char *argv[])
{
        struct nl_cache *link_cache, *route_cache;
        struct rtnl_route *route;
        int nf = 0;
 
        sock = nl_cli_alloc_socket();
        nl_cli_connect(sock, NETLINK_ROUTE);
        link_cache = nl_cli_link_alloc_cache(sock);
        route_cache = nl_cli_route_alloc_cache(sock, 0);
        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,
                        ARG_YES,
                };
                static struct option long_opts[] = {
                        { "interactive", 0, 0, 'i' },
                        { "yes", 0, 0, ARG_YES },
                        { "quiet", 0, 0, 'q' },
                        { "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, "iqhvd:n:t:", long_opts, &optidx);
                if (c == -1)
                        break;
 
                switch (c) {
                case 'i': interactive = 1; break;
                case ARG_YES: default_yes = 1; break;
                case 'q': quiet = 1; break;
                case 'h': print_usage(); break;
                case 'v': print_version(); break;
                case 'd': nf++; nl_cli_route_parse_dst(route, optarg); break;
                case 'n': nf++; nl_cli_route_parse_nexthop(route, optarg, link_cache); break;
                case 't': nf++; nl_cli_route_parse_table(route, optarg); break;
                case ARG_FAMILY: nf++; nl_cli_route_parse_family(route, optarg); break;
                case ARG_SRC: nf++; nl_cli_route_parse_src(route, optarg); break;
                case ARG_IIF: nf++; nl_cli_route_parse_iif(route, optarg, link_cache); break;
                case ARG_PREF_SRC: nf++; nl_cli_route_parse_pref_src(route, optarg); break;
                case ARG_METRICS: nf++; nl_cli_route_parse_metric(route, optarg); break;
                case ARG_PRIORITY: nf++; nl_cli_route_parse_prio(route, optarg); break;
                case ARG_SCOPE: nf++; nl_cli_route_parse_scope(route, optarg); break;
                case ARG_PROTOCOL: nf++; nl_cli_route_parse_protocol(route, optarg); break;
                case ARG_TYPE: nf++; nl_cli_route_parse_type(route, optarg); break;
                }
        }
 
        if (nf == 0 && !interactive && !default_yes) {
                fprintf(stderr, "You attempted to delete all routes in "
                        "non-interactive mode, aborting.\n");
                exit(0);
        }
 
        nl_cache_foreach_filter(route_cache, OBJ_CAST(route), delete_cb, NULL);
 
        if (!quiet)
                printf("Deleted %d routes\n", deleted);
 
        return 0;
}