Home | History | Annotate | Download | only in extensions 
      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 	O_NETLINK,
     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 	{.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 
     45 static 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 
     56 static 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 
     68 static 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 
     79 static 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 
     93 void _init(void)
     94 {
     95 	xtables_register_target(&idletimer_tg_reg);
     96 }
     97