blackhole.c

/*
 * src/lib/blackhole.c    Blackhole module for CLI lib
 *
 *      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) 2010-2011 Thomas Graf <tgraf@suug.ch>
 */

#include <netlink/cli/utils.h>
#include <netlink/cli/tc.h>

static void print_usage(void)
{
        printf(
"Usage: nl-qdisc-add [...] blackhole [OPTIONS]...\n"
"\n"
"OPTIONS\n"
"     --help                Show this help text.\n"
"\n"
"EXAMPLE"
"    # Drop all outgoing packets on eth1\n"
"    nl-qdisc-add --dev=eth1 --parent=root blackhole\n");
}

static void blackhole_parse_argv(struct rtnl_tc *tc, int argc, char **argv)
{
        for (;;) {
                int c, optidx = 0;
                static struct option long_opts[] = {
                        { "help", 0, 0, 'h' },
                        { 0, 0, 0, 0 }
                };
        
                c = getopt_long(argc, argv, "h", long_opts, &optidx);
                if (c == -1)
                        break;

                switch (c) {
                case 'h':
                        print_usage();
                        return;
                }
        }
}

static struct nl_cli_tc_module blackhole_module =
{
        .tm_name                = "blackhole",
        .tm_type                = RTNL_TC_TYPE_QDISC,
        .tm_parse_argv          = blackhole_parse_argv,
};

static void __init blackhole_init(void)
{
        nl_cli_tc_register(&blackhole_module);
}

static void __exit blackhole_exit(void)
{
        nl_cli_tc_unregister(&blackhole_module);
}