libxt_IDLETIMER.c revision e07e0d31f48d951e0f03ba254d4754810732c241 
1/*
2 * Shared library add-on for iptables to add IDLETIMER support.
3 *
4 * Copyright (C) 2010 Nokia Corporation. All rights reserved.
5 *
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23#include <stdio.h>
24#include <xtables.h>
25#include <linux/netfilter/xt_IDLETIMER.h>
26
27enum {
28	O_TIMEOUT = 0,
29	O_LABEL,
30	O_NETLINK,
31};
32
33#define s struct idletimer_tg_info
34static const struct xt_option_entry idletimer_tg_opts[] = {
35	{.name = "timeout", .id = O_TIMEOUT, .type = XTTYPE_UINT32,
36	 .flags = XTOPT_MAND | XTOPT_PUT, XTOPT_POINTER(s, timeout)},
37	{.name = "label", .id = O_LABEL, .type = XTTYPE_STRING,
38	 .flags = XTOPT_MAND | XTOPT_PUT, XTOPT_POINTER(s, label)},
39	{.name = "send_nl_msg", .id = O_NETLINK, .type = XTTYPE_UINT8,
40	 .flags = XTOPT_PUT, XTOPT_POINTER(s, send_nl_msg)},
41	XTOPT_TABLEEND,
42};
43#undef s
44
45static void idletimer_tg_help(void)
46{
47	printf(
48"IDLETIMER target options:\n"
49" --timeout time	Timeout until the notification is sent (in seconds)\n"
50" --label string	Unique rule identifier\n"
51" --send_nl_msg		(0/1) Enable netlink messages,"
52			" and show remaining time in sysfs. Defaults to 0.\n"
53"\n");
54}
55
56static void idletimer_tg_print(const void *ip,
57			       const struct xt_entry_target *target,
58			       int numeric)
59{
60	struct idletimer_tg_info *info =
61		(struct idletimer_tg_info *) target->data;
62
63	printf(" timeout:%u", info->timeout);
64	printf(" label:%s", info->label);
65	printf(" send_nl_msg:%u", info->send_nl_msg);
66}
67
68static void idletimer_tg_save(const void *ip,
69			      const struct xt_entry_target *target)
70{
71	struct idletimer_tg_info *info =
72		(struct idletimer_tg_info *) target->data;
73
74	printf(" --timeout %u", info->timeout);
75	printf(" --label %s", info->label);
76	printf(" --send_nl_msg %u", info->send_nl_msg);
77}
78
79static struct xtables_target idletimer_tg_reg = {
80	.family	       = NFPROTO_UNSPEC,
81	.name	       = "IDLETIMER",
82	.version       = XTABLES_VERSION,
83	.revision      = 1,
84	.size	       = XT_ALIGN(sizeof(struct idletimer_tg_info)),
85	.userspacesize = offsetof(struct idletimer_tg_info, timer),
86	.help	       = idletimer_tg_help,
87	.x6_parse      = xtables_option_parse,
88	.print	       = idletimer_tg_print,
89	.save	       = idletimer_tg_save,
90	.x6_options    = idletimer_tg_opts,
91};
92
93void _init(void)
94{
95	xtables_register_target(&idletimer_tg_reg);
96}
97