[deliverable/linux.git] / net / netfilter / xt_set.c

/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
 *                         Patrick Schaaf <bof@bof.de>
 *                         Martin Josefsson <gandalf@wlug.westbo.se>
 * Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
 *
 * 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.
 */

/* Kernel module which implements the set match and SET target
 * for netfilter/iptables. */

#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/version.h>

#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_set.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
MODULE_DESCRIPTION("Xtables: IP set match and target module");
MODULE_ALIAS("xt_SET");
MODULE_ALIAS("ipt_set");
MODULE_ALIAS("ip6t_set");
MODULE_ALIAS("ipt_SET");
MODULE_ALIAS("ip6t_SET");

static inline int
match_set(ip_set_id_t index, const struct sk_buff *skb,
	  const struct xt_action_param *par,
	  const struct ip_set_adt_opt *opt, int inv)
{
	if (ip_set_test(index, skb, par, opt))
		inv = !inv;
	return inv;
}

#define ADT_OPT(n, f, d, fs, cfs, t) 	\
const struct ip_set_adt_opt n = {	\
	.family	= f,			\
	.dim = d,			\
	.flags = fs,			\
	.cmdflags = cfs,		\
	.timeout = t,			\
}

/* Revision 0 interface: backward compatible with netfilter/iptables */

static bool
set_match_v0(const struct sk_buff *skb, struct xt_action_param *par)
{
	const struct xt_set_info_match_v0 *info = par->matchinfo;
	ADT_OPT(opt, par->family, info->match_set.u.compat.dim,
		info->match_set.u.compat.flags, 0, UINT_MAX);

	return match_set(info->match_set.index, skb, par, &opt,
			 info->match_set.u.compat.flags & IPSET_INV_MATCH);
}

static void
compat_flags(struct xt_set_info_v0 *info)
{
	u_int8_t i;

	/* Fill out compatibility data according to enum ip_set_kopt */
	info->u.compat.dim = IPSET_DIM_ZERO;
	if (info->u.flags[0] & IPSET_MATCH_INV)
		info->u.compat.flags |= IPSET_INV_MATCH;
	for (i = 0; i < IPSET_DIM_MAX-1 && info->u.flags[i]; i++) {
		info->u.compat.dim++;
		if (info->u.flags[i] & IPSET_SRC)
			info->u.compat.flags |= (1<<info->u.compat.dim);
	}
}

static int
set_match_v0_checkentry(const struct xt_mtchk_param *par)
{
	struct xt_set_info_match_v0 *info = par->matchinfo;
	ip_set_id_t index;

	index = ip_set_nfnl_get_byindex(info->match_set.index);

	if (index == IPSET_INVALID_ID) {
		pr_warning("Cannot find set indentified by id %u to match\n",
			   info->match_set.index);
		return -ENOENT;
	}
	if (info->match_set.u.flags[IPSET_DIM_MAX-1] != 0) {
		pr_warning("Protocol error: set match dimension "
			   "is over the limit!\n");
		ip_set_nfnl_put(info->match_set.index);
		return -ERANGE;
	}

	/* Fill out compatibility data */
	compat_flags(&info->match_set);

	return 0;
}

static void
set_match_v0_destroy(const struct xt_mtdtor_param *par)
{
	struct xt_set_info_match_v0 *info = par->matchinfo;

	ip_set_nfnl_put(info->match_set.index);
}

static unsigned int
set_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
{
	const struct xt_set_info_target_v0 *info = par->targinfo;
	ADT_OPT(add_opt, par->family, info->add_set.u.compat.dim,
		info->add_set.u.compat.flags, 0, UINT_MAX);
	ADT_OPT(del_opt, par->family, info->del_set.u.compat.dim,
		info->del_set.u.compat.flags, 0, UINT_MAX);

	if (info->add_set.index != IPSET_INVALID_ID)
		ip_set_add(info->add_set.index, skb, par, &add_opt);
	if (info->del_set.index != IPSET_INVALID_ID)
		ip_set_del(info->del_set.index, skb, par, &del_opt);

	return XT_CONTINUE;
}

static int
set_target_v0_checkentry(const struct xt_tgchk_param *par)
{
	struct xt_set_info_target_v0 *info = par->targinfo;
	ip_set_id_t index;

	if (info->add_set.index != IPSET_INVALID_ID) {
		index = ip_set_nfnl_get_byindex(info->add_set.index);
		if (index == IPSET_INVALID_ID) {
			pr_warning("Cannot find add_set index %u as target\n",
				   info->add_set.index);
			return -ENOENT;
		}
	}

	if (info->del_set.index != IPSET_INVALID_ID) {
		index = ip_set_nfnl_get_byindex(info->del_set.index);
		if (index == IPSET_INVALID_ID) {
			pr_warning("Cannot find del_set index %u as target\n",
				   info->del_set.index);
			if (info->add_set.index != IPSET_INVALID_ID)
				ip_set_nfnl_put(info->add_set.index);
			return -ENOENT;
		}
	}
	if (info->add_set.u.flags[IPSET_DIM_MAX-1] != 0 ||
	    info->del_set.u.flags[IPSET_DIM_MAX-1] != 0) {
		pr_warning("Protocol error: SET target dimension "
			   "is over the limit!\n");
		if (info->add_set.index != IPSET_INVALID_ID)
			ip_set_nfnl_put(info->add_set.index);
		if (info->del_set.index != IPSET_INVALID_ID)
			ip_set_nfnl_put(info->del_set.index);
		return -ERANGE;
	}

	/* Fill out compatibility data */
	compat_flags(&info->add_set);
	compat_flags(&info->del_set);

	return 0;
}

static void
set_target_v0_destroy(const struct xt_tgdtor_param *par)
{
	const struct xt_set_info_target_v0 *info = par->targinfo;

	if (info->add_set.index != IPSET_INVALID_ID)
		ip_set_nfnl_put(info->add_set.index);
	if (info->del_set.index != IPSET_INVALID_ID)
		ip_set_nfnl_put(info->del_set.index);
}

/* Revision 1 match and target */

static bool
set_match_v1(const struct sk_buff *skb, struct xt_action_param *par)
{
	const struct xt_set_info_match_v1 *info = par->matchinfo;
	ADT_OPT(opt, par->family, info->match_set.dim,
		info->match_set.flags, 0, UINT_MAX);

	return match_set(info->match_set.index, skb, par, &opt,
			 info->match_set.flags & IPSET_INV_MATCH);
}

static int
set_match_v1_checkentry(const struct xt_mtchk_param *par)
{
	struct xt_set_info_match_v1 *info = par->matchinfo;
	ip_set_id_t index;

	index = ip_set_nfnl_get_byindex(info->match_set.index);

	if (index == IPSET_INVALID_ID) {
		pr_warning("Cannot find set indentified by id %u to match\n",
			   info->match_set.index);
		return -ENOENT;
	}
	if (info->match_set.dim > IPSET_DIM_MAX) {
		pr_warning("Protocol error: set match dimension "
			   "is over the limit!\n");
		ip_set_nfnl_put(info->match_set.index);
		return -ERANGE;
	}

	return 0;
}

static void
set_match_v1_destroy(const struct xt_mtdtor_param *par)
{
	struct xt_set_info_match_v1 *info = par->matchinfo;

	ip_set_nfnl_put(info->match_set.index);
}

static unsigned int
set_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
	const struct xt_set_info_target_v1 *info = par->targinfo;
	ADT_OPT(add_opt, par->family, info->add_set.dim,
		info->add_set.flags, 0, UINT_MAX);
	ADT_OPT(del_opt, par->family, info->del_set.dim,
		info->del_set.flags, 0, UINT_MAX);

	if (info->add_set.index != IPSET_INVALID_ID)
		ip_set_add(info->add_set.index, skb, par, &add_opt);
	if (info->del_set.index != IPSET_INVALID_ID)
		ip_set_del(info->del_set.index, skb, par, &del_opt);

	return XT_CONTINUE;
}

static int
set_target_v1_checkentry(const struct xt_tgchk_param *par)
{
	const struct xt_set_info_target_v1 *info = par->targinfo;
	ip_set_id_t index;

	if (info->add_set.index != IPSET_INVALID_ID) {
		index = ip_set_nfnl_get_byindex(info->add_set.index);
		if (index == IPSET_INVALID_ID) {
			pr_warning("Cannot find add_set index %u as target\n",
				   info->add_set.index);
			return -ENOENT;
		}
	}

	if (info->del_set.index != IPSET_INVALID_ID) {
		index = ip_set_nfnl_get_byindex(info->del_set.index);
		if (index == IPSET_INVALID_ID) {
			pr_warning("Cannot find del_set index %u as target\n",
				   info->del_set.index);
			if (info->add_set.index != IPSET_INVALID_ID)
				ip_set_nfnl_put(info->add_set.index);
			return -ENOENT;
		}
	}
	if (info->add_set.dim > IPSET_DIM_MAX ||
	    info->del_set.dim > IPSET_DIM_MAX) {
		pr_warning("Protocol error: SET target dimension "
			   "is over the limit!\n");
		if (info->add_set.index != IPSET_INVALID_ID)
			ip_set_nfnl_put(info->add_set.index);
		if (info->del_set.index != IPSET_INVALID_ID)
			ip_set_nfnl_put(info->del_set.index);
		return -ERANGE;
	}

	return 0;
}

static void
set_target_v1_destroy(const struct xt_tgdtor_param *par)
{
	const struct xt_set_info_target_v1 *info = par->targinfo;

	if (info->add_set.index != IPSET_INVALID_ID)
		ip_set_nfnl_put(info->add_set.index);
	if (info->del_set.index != IPSET_INVALID_ID)
		ip_set_nfnl_put(info->del_set.index);
}

/* Revision 2 target */

static unsigned int
set_target_v2(struct sk_buff *skb, const struct xt_action_param *par)
{
	const struct xt_set_info_target_v2 *info = par->targinfo;
	ADT_OPT(add_opt, par->family, info->add_set.dim,
		info->add_set.flags, info->flags, info->timeout);
	ADT_OPT(del_opt, par->family, info->del_set.dim,
		info->del_set.flags, 0, UINT_MAX);

	if (info->add_set.index != IPSET_INVALID_ID)
		ip_set_add(info->add_set.index, skb, par, &add_opt);
	if (info->del_set.index != IPSET_INVALID_ID)
		ip_set_del(info->del_set.index, skb, par, &del_opt);

	return XT_CONTINUE;
}

#define set_target_v2_checkentry	set_target_v1_checkentry
#define set_target_v2_destroy		set_target_v1_destroy

static struct xt_match set_matches[] __read_mostly = {
	{
		.name		= "set",
		.family		= NFPROTO_IPV4,
		.revision	= 0,
		.match		= set_match_v0,
		.matchsize	= sizeof(struct xt_set_info_match_v0),
		.checkentry	= set_match_v0_checkentry,
		.destroy	= set_match_v0_destroy,
		.me		= THIS_MODULE
	},
	{
		.name		= "set",
		.family		= NFPROTO_IPV4,
		.revision	= 1,
		.match		= set_match_v1,
		.matchsize	= sizeof(struct xt_set_info_match_v1),
		.checkentry	= set_match_v1_checkentry,
		.destroy	= set_match_v1_destroy,
		.me		= THIS_MODULE
	},
	{
		.name		= "set",
		.family		= NFPROTO_IPV6,
		.revision	= 1,
		.match		= set_match_v1,
		.matchsize	= sizeof(struct xt_set_info_match_v1),
		.checkentry	= set_match_v1_checkentry,
		.destroy	= set_match_v1_destroy,
		.me		= THIS_MODULE
	},
};

static struct xt_target set_targets[] __read_mostly = {
	{
		.name		= "SET",
		.revision	= 0,
		.family		= NFPROTO_IPV4,
		.target		= set_target_v0,
		.targetsize	= sizeof(struct xt_set_info_target_v0),
		.checkentry	= set_target_v0_checkentry,
		.destroy	= set_target_v0_destroy,
		.me		= THIS_MODULE
	},
	{
		.name		= "SET",
		.revision	= 1,
		.family		= NFPROTO_IPV4,
		.target		= set_target_v1,
		.targetsize	= sizeof(struct xt_set_info_target_v1),
		.checkentry	= set_target_v1_checkentry,
		.destroy	= set_target_v1_destroy,
		.me		= THIS_MODULE
	},
	{
		.name		= "SET",
		.revision	= 1,
		.family		= NFPROTO_IPV6,
		.target		= set_target_v1,
		.targetsize	= sizeof(struct xt_set_info_target_v1),
		.checkentry	= set_target_v1_checkentry,
		.destroy	= set_target_v1_destroy,
		.me		= THIS_MODULE
	},
	{
		.name		= "SET",
		.revision	= 2,
		.family		= NFPROTO_IPV4,
		.target		= set_target_v2,
		.targetsize	= sizeof(struct xt_set_info_target_v2),
		.checkentry	= set_target_v2_checkentry,
		.destroy	= set_target_v2_destroy,
		.me		= THIS_MODULE
	},
	{
		.name		= "SET",
		.revision	= 2,
		.family		= NFPROTO_IPV6,
		.target		= set_target_v2,
		.targetsize	= sizeof(struct xt_set_info_target_v2),
		.checkentry	= set_target_v2_checkentry,
		.destroy	= set_target_v2_destroy,
		.me		= THIS_MODULE
	},
};

static int __init xt_set_init(void)
{
	int ret = xt_register_matches(set_matches, ARRAY_SIZE(set_matches));

	if (!ret) {
		ret = xt_register_targets(set_targets,
					  ARRAY_SIZE(set_targets));
		if (ret)
			xt_unregister_matches(set_matches,
					      ARRAY_SIZE(set_matches));
	}
	return ret;
}

static void __exit xt_set_fini(void)
{
	xt_unregister_matches(set_matches, ARRAY_SIZE(set_matches));
	xt_unregister_targets(set_targets, ARRAY_SIZE(set_targets));
}

module_init(xt_set_init);
module_exit(xt_set_fini);
Commit	Line	Data
d956798d JK	1	/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
	2	* Patrick Schaaf <bof@bof.de>
	3	* Martin Josefsson <gandalf@wlug.westbo.se>
	4	* Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	/* Kernel module which implements the set match and SET target
	12	* for netfilter/iptables. */
	13
	14	#include <linux/module.h>
	15	#include <linux/skbuff.h>
	16	#include <linux/version.h>
	17
	18	#include <linux/netfilter/x_tables.h>
	19	#include <linux/netfilter/xt_set.h>
	20
	21	MODULE_LICENSE("GPL");
	22	MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
	23	MODULE_DESCRIPTION("Xtables: IP set match and target module");
	24	MODULE_ALIAS("xt_SET");
	25	MODULE_ALIAS("ipt_set");
	26	MODULE_ALIAS("ip6t_set");
	27	MODULE_ALIAS("ipt_SET");
	28	MODULE_ALIAS("ip6t_SET");
	29
	30	static inline int
	31	match_set(ip_set_id_t index, const struct sk_buff *skb,
b66554cf	32	const struct xt_action_param *par,
ac8cc925	33	const struct ip_set_adt_opt *opt, int inv)
d956798d	34	{
b66554cf	35	if (ip_set_test(index, skb, par, opt))
d956798d JK	36	inv = !inv;
	37	return inv;
	38	}
	39
ac8cc925 JK	40	#define ADT_OPT(n, f, d, fs, cfs, t) \
	41	const struct ip_set_adt_opt n = { \
	42	.family = f, \
	43	.dim = d, \
	44	.flags = fs, \
	45	.cmdflags = cfs, \
	46	.timeout = t, \
	47	}
	48
d956798d JK	49	/* Revision 0 interface: backward compatible with netfilter/iptables */
	50
	51	static bool
	52	set_match_v0(const struct sk_buff skb, struct xt_action_param par)
	53	{
	54	const struct xt_set_info_match_v0 *info = par->matchinfo;
ac8cc925 JK	55	ADT_OPT(opt, par->family, info->match_set.u.compat.dim,
ac8cc925 JK	56	info->match_set.u.compat.flags, 0, UINT_MAX);
d956798d	57
b66554cf	58	return match_set(info->match_set.index, skb, par, &opt,
d956798d JK	59	info->match_set.u.compat.flags & IPSET_INV_MATCH);
	60	}
	61
	62	static void
	63	compat_flags(struct xt_set_info_v0 *info)
	64	{
	65	u_int8_t i;
	66
	67	/* Fill out compatibility data according to enum ip_set_kopt */
	68	info->u.compat.dim = IPSET_DIM_ZERO;
	69	if (info->u.flags[0] & IPSET_MATCH_INV)
	70	info->u.compat.flags \|= IPSET_INV_MATCH;
	71	for (i = 0; i < IPSET_DIM_MAX-1 && info->u.flags[i]; i++) {
	72	info->u.compat.dim++;
	73	if (info->u.flags[i] & IPSET_SRC)
	74	info->u.compat.flags \|= (1<<info->u.compat.dim);
	75	}
	76	}
	77
	78	static int
	79	set_match_v0_checkentry(const struct xt_mtchk_param *par)
	80	{
	81	struct xt_set_info_match_v0 *info = par->matchinfo;
	82	ip_set_id_t index;
	83
	84	index = ip_set_nfnl_get_byindex(info->match_set.index);
	85
	86	if (index == IPSET_INVALID_ID) {
	87	pr_warning("Cannot find set indentified by id %u to match\n",
	88	info->match_set.index);
	89	return -ENOENT;
	90	}
	91	if (info->match_set.u.flags[IPSET_DIM_MAX-1] != 0) {
	92	pr_warning("Protocol error: set match dimension "
	93	"is over the limit!\n");
eafbd3fd	94	ip_set_nfnl_put(info->match_set.index);
d956798d JK	95	return -ERANGE;
	96	}
	97
	98	/* Fill out compatibility data */
	99	compat_flags(&info->match_set);
	100
	101	return 0;
	102	}
	103
	104	static void
	105	set_match_v0_destroy(const struct xt_mtdtor_param *par)
	106	{
	107	struct xt_set_info_match_v0 *info = par->matchinfo;
	108
	109	ip_set_nfnl_put(info->match_set.index);
	110	}
	111
	112	static unsigned int
	113	set_target_v0(struct sk_buff skb, const struct xt_action_param par)
	114	{
	115	const struct xt_set_info_target_v0 *info = par->targinfo;
ac8cc925 JK	116	ADT_OPT(add_opt, par->family, info->add_set.u.compat.dim,
	117	info->add_set.u.compat.flags, 0, UINT_MAX);
	118	ADT_OPT(del_opt, par->family, info->del_set.u.compat.dim,
	119	info->del_set.u.compat.flags, 0, UINT_MAX);
d956798d JK	120
d956798d JK	121	if (info->add_set.index != IPSET_INVALID_ID)
b66554cf	122	ip_set_add(info->add_set.index, skb, par, &add_opt);
d956798d	123	if (info->del_set.index != IPSET_INVALID_ID)
b66554cf	124	ip_set_del(info->del_set.index, skb, par, &del_opt);
d956798d JK	125
	126	return XT_CONTINUE;
	127	}
	128
	129	static int
	130	set_target_v0_checkentry(const struct xt_tgchk_param *par)
	131	{
	132	struct xt_set_info_target_v0 *info = par->targinfo;
	133	ip_set_id_t index;
	134
	135	if (info->add_set.index != IPSET_INVALID_ID) {
	136	index = ip_set_nfnl_get_byindex(info->add_set.index);
	137	if (index == IPSET_INVALID_ID) {
	138	pr_warning("Cannot find add_set index %u as target\n",
	139	info->add_set.index);
	140	return -ENOENT;
	141	}
	142	}
	143
	144	if (info->del_set.index != IPSET_INVALID_ID) {
	145	index = ip_set_nfnl_get_byindex(info->del_set.index);
	146	if (index == IPSET_INVALID_ID) {
	147	pr_warning("Cannot find del_set index %u as target\n",
	148	info->del_set.index);
eafbd3fd JK	149	if (info->add_set.index != IPSET_INVALID_ID)
eafbd3fd JK	150	ip_set_nfnl_put(info->add_set.index);
d956798d JK	151	return -ENOENT;
	152	}
	153	}
	154	if (info->add_set.u.flags[IPSET_DIM_MAX-1] != 0 \|\|
	155	info->del_set.u.flags[IPSET_DIM_MAX-1] != 0) {
	156	pr_warning("Protocol error: SET target dimension "
	157	"is over the limit!\n");
eafbd3fd JK	158	if (info->add_set.index != IPSET_INVALID_ID)
	159	ip_set_nfnl_put(info->add_set.index);
	160	if (info->del_set.index != IPSET_INVALID_ID)
	161	ip_set_nfnl_put(info->del_set.index);
d956798d JK	162	return -ERANGE;
	163	}
	164
	165	/* Fill out compatibility data */
	166	compat_flags(&info->add_set);
	167	compat_flags(&info->del_set);
	168
	169	return 0;
	170	}
	171
	172	static void
	173	set_target_v0_destroy(const struct xt_tgdtor_param *par)
	174	{
	175	const struct xt_set_info_target_v0 *info = par->targinfo;
	176
	177	if (info->add_set.index != IPSET_INVALID_ID)
	178	ip_set_nfnl_put(info->add_set.index);
	179	if (info->del_set.index != IPSET_INVALID_ID)
	180	ip_set_nfnl_put(info->del_set.index);
	181	}
	182
ac8cc925	183	/* Revision 1 match and target */
d956798d JK	184
d956798d JK	185	static bool
ac8cc925	186	set_match_v1(const struct sk_buff skb, struct xt_action_param par)
d956798d	187	{
ac8cc925 JK	188	const struct xt_set_info_match_v1 *info = par->matchinfo;
	189	ADT_OPT(opt, par->family, info->match_set.dim,
	190	info->match_set.flags, 0, UINT_MAX);
d956798d	191
b66554cf	192	return match_set(info->match_set.index, skb, par, &opt,
d956798d JK	193	info->match_set.flags & IPSET_INV_MATCH);
	194	}
	195
	196	static int
ac8cc925	197	set_match_v1_checkentry(const struct xt_mtchk_param *par)
d956798d	198	{
ac8cc925	199	struct xt_set_info_match_v1 *info = par->matchinfo;
d956798d JK	200	ip_set_id_t index;
	201
	202	index = ip_set_nfnl_get_byindex(info->match_set.index);
	203
	204	if (index == IPSET_INVALID_ID) {
	205	pr_warning("Cannot find set indentified by id %u to match\n",
	206	info->match_set.index);
	207	return -ENOENT;
	208	}
	209	if (info->match_set.dim > IPSET_DIM_MAX) {
	210	pr_warning("Protocol error: set match dimension "
	211	"is over the limit!\n");
eafbd3fd	212	ip_set_nfnl_put(info->match_set.index);
d956798d JK	213	return -ERANGE;
	214	}
	215
	216	return 0;
	217	}
	218
	219	static void
ac8cc925	220	set_match_v1_destroy(const struct xt_mtdtor_param *par)
d956798d	221	{
ac8cc925	222	struct xt_set_info_match_v1 *info = par->matchinfo;
d956798d JK	223
	224	ip_set_nfnl_put(info->match_set.index);
	225	}
	226
	227	static unsigned int
ac8cc925	228	set_target_v1(struct sk_buff skb, const struct xt_action_param par)
d956798d	229	{
ac8cc925 JK	230	const struct xt_set_info_target_v1 *info = par->targinfo;
	231	ADT_OPT(add_opt, par->family, info->add_set.dim,
	232	info->add_set.flags, 0, UINT_MAX);
	233	ADT_OPT(del_opt, par->family, info->del_set.dim,
	234	info->del_set.flags, 0, UINT_MAX);
d956798d JK	235
d956798d JK	236	if (info->add_set.index != IPSET_INVALID_ID)
b66554cf	237	ip_set_add(info->add_set.index, skb, par, &add_opt);
d956798d	238	if (info->del_set.index != IPSET_INVALID_ID)
b66554cf	239	ip_set_del(info->del_set.index, skb, par, &del_opt);
d956798d JK	240
	241	return XT_CONTINUE;
	242	}
	243
	244	static int
ac8cc925	245	set_target_v1_checkentry(const struct xt_tgchk_param *par)
d956798d	246	{
ac8cc925	247	const struct xt_set_info_target_v1 *info = par->targinfo;
d956798d JK	248	ip_set_id_t index;
	249
	250	if (info->add_set.index != IPSET_INVALID_ID) {
	251	index = ip_set_nfnl_get_byindex(info->add_set.index);
	252	if (index == IPSET_INVALID_ID) {
	253	pr_warning("Cannot find add_set index %u as target\n",
	254	info->add_set.index);
	255	return -ENOENT;
	256	}
	257	}
	258
	259	if (info->del_set.index != IPSET_INVALID_ID) {
	260	index = ip_set_nfnl_get_byindex(info->del_set.index);
	261	if (index == IPSET_INVALID_ID) {
	262	pr_warning("Cannot find del_set index %u as target\n",
	263	info->del_set.index);
eafbd3fd JK	264	if (info->add_set.index != IPSET_INVALID_ID)
eafbd3fd JK	265	ip_set_nfnl_put(info->add_set.index);
d956798d JK	266	return -ENOENT;
	267	}
	268	}
	269	if (info->add_set.dim > IPSET_DIM_MAX \|\|
eafbd3fd	270	info->del_set.dim > IPSET_DIM_MAX) {
d956798d JK	271	pr_warning("Protocol error: SET target dimension "
d956798d JK	272	"is over the limit!\n");
eafbd3fd JK	273	if (info->add_set.index != IPSET_INVALID_ID)
	274	ip_set_nfnl_put(info->add_set.index);
	275	if (info->del_set.index != IPSET_INVALID_ID)
	276	ip_set_nfnl_put(info->del_set.index);
d956798d JK	277	return -ERANGE;
	278	}
	279
	280	return 0;
	281	}
	282
	283	static void
ac8cc925	284	set_target_v1_destroy(const struct xt_tgdtor_param *par)
d956798d	285	{
ac8cc925	286	const struct xt_set_info_target_v1 *info = par->targinfo;
d956798d JK	287
	288	if (info->add_set.index != IPSET_INVALID_ID)
	289	ip_set_nfnl_put(info->add_set.index);
	290	if (info->del_set.index != IPSET_INVALID_ID)
	291	ip_set_nfnl_put(info->del_set.index);
	292	}
	293
ac8cc925 JK	294	/* Revision 2 target */
	295
	296	static unsigned int
	297	set_target_v2(struct sk_buff skb, const struct xt_action_param par)
	298	{
	299	const struct xt_set_info_target_v2 *info = par->targinfo;
	300	ADT_OPT(add_opt, par->family, info->add_set.dim,
	301	info->add_set.flags, info->flags, info->timeout);
	302	ADT_OPT(del_opt, par->family, info->del_set.dim,
	303	info->del_set.flags, 0, UINT_MAX);
	304
	305	if (info->add_set.index != IPSET_INVALID_ID)
b66554cf	306	ip_set_add(info->add_set.index, skb, par, &add_opt);
ac8cc925	307	if (info->del_set.index != IPSET_INVALID_ID)
b66554cf	308	ip_set_del(info->del_set.index, skb, par, &del_opt);
ac8cc925 JK	309
	310	return XT_CONTINUE;
	311	}
	312
	313	#define set_target_v2_checkentry set_target_v1_checkentry
	314	#define set_target_v2_destroy set_target_v1_destroy
	315
d956798d JK	316	static struct xt_match set_matches[] __read_mostly = {
	317	{
	318	.name = "set",
	319	.family = NFPROTO_IPV4,
	320	.revision = 0,
	321	.match = set_match_v0,
	322	.matchsize = sizeof(struct xt_set_info_match_v0),
	323	.checkentry = set_match_v0_checkentry,
	324	.destroy = set_match_v0_destroy,
	325	.me = THIS_MODULE
	326	},
	327	{
	328	.name = "set",
	329	.family = NFPROTO_IPV4,
	330	.revision = 1,
ac8cc925 JK	331	.match = set_match_v1,
	332	.matchsize = sizeof(struct xt_set_info_match_v1),
	333	.checkentry = set_match_v1_checkentry,
	334	.destroy = set_match_v1_destroy,
d956798d JK	335	.me = THIS_MODULE
	336	},
	337	{
	338	.name = "set",
	339	.family = NFPROTO_IPV6,
	340	.revision = 1,
ac8cc925 JK	341	.match = set_match_v1,
	342	.matchsize = sizeof(struct xt_set_info_match_v1),
	343	.checkentry = set_match_v1_checkentry,
	344	.destroy = set_match_v1_destroy,
d956798d JK	345	.me = THIS_MODULE
	346	},
	347	};
	348
	349	static struct xt_target set_targets[] __read_mostly = {
	350	{
	351	.name = "SET",
	352	.revision = 0,
	353	.family = NFPROTO_IPV4,
	354	.target = set_target_v0,
	355	.targetsize = sizeof(struct xt_set_info_target_v0),
	356	.checkentry = set_target_v0_checkentry,
	357	.destroy = set_target_v0_destroy,
	358	.me = THIS_MODULE
	359	},
	360	{
	361	.name = "SET",
	362	.revision = 1,
	363	.family = NFPROTO_IPV4,
ac8cc925 JK	364	.target = set_target_v1,
	365	.targetsize = sizeof(struct xt_set_info_target_v1),
	366	.checkentry = set_target_v1_checkentry,
	367	.destroy = set_target_v1_destroy,
d956798d JK	368	.me = THIS_MODULE
	369	},
	370	{
	371	.name = "SET",
	372	.revision = 1,
	373	.family = NFPROTO_IPV6,
ac8cc925 JK	374	.target = set_target_v1,
	375	.targetsize = sizeof(struct xt_set_info_target_v1),
	376	.checkentry = set_target_v1_checkentry,
	377	.destroy = set_target_v1_destroy,
	378	.me = THIS_MODULE
	379	},
	380	{
	381	.name = "SET",
	382	.revision = 2,
	383	.family = NFPROTO_IPV4,
	384	.target = set_target_v2,
	385	.targetsize = sizeof(struct xt_set_info_target_v2),
	386	.checkentry = set_target_v2_checkentry,
	387	.destroy = set_target_v2_destroy,
	388	.me = THIS_MODULE
	389	},
	390	{
	391	.name = "SET",
	392	.revision = 2,
	393	.family = NFPROTO_IPV6,
	394	.target = set_target_v2,
	395	.targetsize = sizeof(struct xt_set_info_target_v2),
	396	.checkentry = set_target_v2_checkentry,
	397	.destroy = set_target_v2_destroy,
d956798d JK	398	.me = THIS_MODULE
	399	},
	400	};
	401
	402	static int __init xt_set_init(void)
	403	{
	404	int ret = xt_register_matches(set_matches, ARRAY_SIZE(set_matches));
	405
	406	if (!ret) {
	407	ret = xt_register_targets(set_targets,
	408	ARRAY_SIZE(set_targets));
	409	if (ret)
	410	xt_unregister_matches(set_matches,
	411	ARRAY_SIZE(set_matches));
	412	}
	413	return ret;
	414	}
	415
	416	static void __exit xt_set_fini(void)
	417	{
	418	xt_unregister_matches(set_matches, ARRAY_SIZE(set_matches));
	419	xt_unregister_targets(set_targets, ARRAY_SIZE(set_targets));
	420	}
	421
	422	module_init(xt_set_init);
	423	module_exit(xt_set_fini);