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
27 enum {
28 O_TIMEOUT = 0,
29 O_LABEL,
30 O_ALARM,
31 };
32
33 #define s struct idletimer_tg_info
34 static 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 XTOPT_TABLEEND,
40 };
41 #undef s
42
43 #define s struct idletimer_tg_info_v1
44 static const struct xt_option_entry idletimer_tg_opts_v1[] = {
45 {.name = "timeout", .id = O_TIMEOUT, .type = XTTYPE_UINT32,
46 .flags = XTOPT_MAND | XTOPT_PUT, XTOPT_POINTER(s, timeout)},
47 {.name = "label", .id = O_LABEL, .type = XTTYPE_STRING,
48 .flags = XTOPT_MAND | XTOPT_PUT, XTOPT_POINTER(s, label)},
49 {.name = "alarm", .id = O_ALARM, .type = XTTYPE_NONE},
50 XTOPT_TABLEEND,
51 };
52 #undef s
53
idletimer_tg_help(void)54 static void idletimer_tg_help(void)
55 {
56 printf(
57 "IDLETIMER target options:\n"
58 " --timeout time Timeout until the notification is sent (in seconds)\n"
59 " --label string Unique rule identifier\n"
60 "\n");
61 }
62
idletimer_tg_help_v1(void)63 static void idletimer_tg_help_v1(void)
64 {
65 printf(
66 "IDLETIMER target options:\n"
67 " --timeout time Timeout until the notification is sent (in seconds)\n"
68 " --label string Unique rule identifier\n"
69 " --alarm Use alarm instead of default timer\n"
70 "\n");
71 }
72
idletimer_tg_print(const void * ip,const struct xt_entry_target * target,int numeric)73 static void idletimer_tg_print(const void *ip,
74 const struct xt_entry_target *target,
75 int numeric)
76 {
77 struct idletimer_tg_info *info =
78 (struct idletimer_tg_info *) target->data;
79
80 printf(" timeout:%u", info->timeout);
81 printf(" label:%s", info->label);
82 }
83
idletimer_tg_print_v1(const void * ip,const struct xt_entry_target * target,int numeric)84 static void idletimer_tg_print_v1(const void *ip,
85 const struct xt_entry_target *target,
86 int numeric)
87 {
88 struct idletimer_tg_info_v1 *info =
89 (struct idletimer_tg_info_v1 *) target->data;
90
91 printf(" timeout:%u", info->timeout);
92 printf(" label:%s", info->label);
93 if (info->timer_type == XT_IDLETIMER_ALARM)
94 printf(" alarm");
95 }
96
97
idletimer_tg_save(const void * ip,const struct xt_entry_target * target)98 static void idletimer_tg_save(const void *ip,
99 const struct xt_entry_target *target)
100 {
101 struct idletimer_tg_info *info =
102 (struct idletimer_tg_info *) target->data;
103
104 printf(" --timeout %u", info->timeout);
105 printf(" --label %s", info->label);
106 }
107
idletimer_tg_save_v1(const void * ip,const struct xt_entry_target * target)108 static void idletimer_tg_save_v1(const void *ip,
109 const struct xt_entry_target *target)
110 {
111 struct idletimer_tg_info_v1 *info =
112 (struct idletimer_tg_info_v1 *) target->data;
113
114 printf(" --timeout %u", info->timeout);
115 printf(" --label %s", info->label);
116 if (info->timer_type == XT_IDLETIMER_ALARM)
117 printf(" --alarm");
118 }
119
idletimer_tg_parse_v1(struct xt_option_call * cb)120 static void idletimer_tg_parse_v1(struct xt_option_call *cb)
121 {
122 struct idletimer_tg_info_v1 *info = cb->data;
123
124 xtables_option_parse(cb);
125 if (cb->entry->id == O_ALARM)
126 info->timer_type = XT_IDLETIMER_ALARM;
127 }
128
129 static struct xtables_target idletimer_tg_reg[] = {
130 {
131 .family = NFPROTO_UNSPEC,
132 .name = "IDLETIMER",
133 .version = XTABLES_VERSION,
134 .revision = 0,
135 .size = XT_ALIGN(sizeof(struct idletimer_tg_info)),
136 .userspacesize = offsetof(struct idletimer_tg_info, timer),
137 .help = idletimer_tg_help,
138 .x6_parse = xtables_option_parse,
139 .print = idletimer_tg_print,
140 .save = idletimer_tg_save,
141 .x6_options = idletimer_tg_opts,
142 },
143 {
144 .family = NFPROTO_UNSPEC,
145 .name = "IDLETIMER",
146 .version = XTABLES_VERSION,
147 .revision = 1,
148 .size = XT_ALIGN(sizeof(struct idletimer_tg_info_v1)),
149 .userspacesize = offsetof(struct idletimer_tg_info_v1, timer),
150 .help = idletimer_tg_help_v1,
151 .x6_parse = idletimer_tg_parse_v1,
152 .print = idletimer_tg_print_v1,
153 .save = idletimer_tg_save_v1,
154 .x6_options = idletimer_tg_opts_v1,
155 },
156
157 };
158
_init(void)159 void _init(void)
160 {
161 xtables_register_targets(idletimer_tg_reg, ARRAY_SIZE(idletimer_tg_reg));
162 }
163