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      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 (at) 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 };
     31 
     32 #define s struct idletimer_tg_info
     33 static const struct xt_option_entry idletimer_tg_opts[] = {
     34 	{.name = "timeout", .id = O_TIMEOUT, .type = XTTYPE_UINT32,
     35 	 .flags = XTOPT_MAND | XTOPT_PUT, XTOPT_POINTER(s, timeout)},
     36 	{.name = "label", .id = O_LABEL, .type = XTTYPE_STRING,
     37 	 .flags = XTOPT_MAND | XTOPT_PUT, XTOPT_POINTER(s, label)},
     38 	XTOPT_TABLEEND,
     39 };
     40 #undef s
     41 
     42 static void idletimer_tg_help(void)
     43 {
     44 	printf(
     45 "IDLETIMER target options:\n"
     46 " --timeout time	Timeout until the notification is sent (in seconds)\n"
     47 " --label string	Unique rule identifier\n"
     48 "\n");
     49 }
     50 
     51 static void idletimer_tg_print(const void *ip,
     52 			       const struct xt_entry_target *target,
     53 			       int numeric)
     54 {
     55 	struct idletimer_tg_info *info =
     56 		(struct idletimer_tg_info *) target->data;
     57 
     58 	printf(" timeout:%u", info->timeout);
     59 	printf(" label:%s", info->label);
     60 }
     61 
     62 static void idletimer_tg_save(const void *ip,
     63 			      const struct xt_entry_target *target)
     64 {
     65 	struct idletimer_tg_info *info =
     66 		(struct idletimer_tg_info *) target->data;
     67 
     68 	printf(" --timeout %u", info->timeout);
     69 	printf(" --label %s", info->label);
     70 }
     71 
     72 static struct xtables_target idletimer_tg_reg = {
     73 	.family	       = NFPROTO_UNSPEC,
     74 	.name	       = "IDLETIMER",
     75 	.version       = XTABLES_VERSION,
     76 	.revision      = 0,
     77 	.size	       = XT_ALIGN(sizeof(struct idletimer_tg_info)),
     78 	.userspacesize = offsetof(struct idletimer_tg_info, timer),
     79 	.help	       = idletimer_tg_help,
     80 	.x6_parse      = xtables_option_parse,
     81 	.print	       = idletimer_tg_print,
     82 	.save	       = idletimer_tg_save,
     83 	.x6_options    = idletimer_tg_opts,
     84 };
     85 
     86 void _init(void)
     87 {
     88 	xtables_register_target(&idletimer_tg_reg);
     89 }
     90