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/*
* Shared library add-on for iptables to add IDLETIMER support.
*
* Copyright (C) 2010 Nokia Corporation. All rights reserved.
*
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <stddef.h>
#include <xtables.h>
#include <linux/netfilter/xt_IDLETIMER.h>
enum {
IDLETIMER_TG_OPT_TIMEOUT = 1 << 0,
IDLETIMER_TG_OPT_LABEL = 1 << 1,
};
static const struct option idletimer_tg_opts[] = {
{.name = "timeout", .has_arg = true, .val = 't'},
{.name = "label", .has_arg = true, .val = 'l'},
XT_GETOPT_TABLEEND,
};
static void idletimer_tg_help(void)
{
printf(
"IDLETIMER target options:\n"
" --timeout time Timeout until the notification is sent (in seconds)\n"
" --label string Unique rule identifier\n"
"\n");
}
static int idletimer_tg_parse(int c, char **argv, int invert,
unsigned int *flags,
const void *entry,
struct xt_entry_target **target)
{
struct idletimer_tg_info *info =
(struct idletimer_tg_info *)(*target)->data;
switch (c) {
case 't':
xtables_param_act(XTF_ONLY_ONCE, "IDLETIMER", "--timeout",
*flags & IDLETIMER_TG_OPT_TIMEOUT);
info->timeout = atoi(optarg);
*flags |= IDLETIMER_TG_OPT_TIMEOUT;
break;
case 'l':
xtables_param_act(XTF_ONLY_ONCE, "IDLETIMER", "--label",
*flags & IDLETIMER_TG_OPT_TIMEOUT);
if (strlen(optarg) > MAX_IDLETIMER_LABEL_SIZE - 1)
xtables_param_act(XTF_BAD_VALUE, "IDLETIMER", "--label",
optarg);
strcpy(info->label, optarg);
*flags |= IDLETIMER_TG_OPT_LABEL;
break;
}
return true;
}
static void idletimer_tg_final_check(unsigned int flags)
{
if (!(flags & IDLETIMER_TG_OPT_TIMEOUT))
xtables_error(PARAMETER_PROBLEM, "IDLETIMER target: "
"--timeout parameter required");
if (!(flags & IDLETIMER_TG_OPT_LABEL))
xtables_error(PARAMETER_PROBLEM, "IDLETIMER target: "
"--label parameter required");
}
static void idletimer_tg_print(const void *ip,
const struct xt_entry_target *target,
int numeric)
{
struct idletimer_tg_info *info =
(struct idletimer_tg_info *) target->data;
printf(" timeout:%u", info->timeout);
printf(" label:%s", info->label);
}
static void idletimer_tg_save(const void *ip,
const struct xt_entry_target *target)
{
struct idletimer_tg_info *info =
(struct idletimer_tg_info *) target->data;
printf(" --timeout %u", info->timeout);
printf(" --label %s", info->label);
}
static struct xtables_target idletimer_tg_reg = {
.family = NFPROTO_UNSPEC,
.name = "IDLETIMER",
.version = XTABLES_VERSION,
.revision = 0,
.size = XT_ALIGN(sizeof(struct idletimer_tg_info)),
.userspacesize = offsetof(struct idletimer_tg_info, timer),
.help = idletimer_tg_help,
.parse = idletimer_tg_parse,
.final_check = idletimer_tg_final_check,
.print = idletimer_tg_print,
.save = idletimer_tg_save,
.extra_opts = idletimer_tg_opts,
};
void _init(void)
{
xtables_register_target(&idletimer_tg_reg);
}
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