[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / netfilter / xt_CT.c

/*
 * Copyright (c) 2010 Patrick McHardy <kaber@trash.net>
 *
 * 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.
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/skbuff.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_CT.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_timeout.h>
#include <net/netfilter/nf_conntrack_zones.h>

static unsigned int xt_ct_target_v0(struct sk_buff *skb,
				    const struct xt_action_param *par)
{
	const struct xt_ct_target_info *info = par->targinfo;
	struct nf_conn *ct = info->ct;

	/* Previously seen (loopback)? Ignore. */
	if (skb->nfct != NULL)
		return XT_CONTINUE;

	atomic_inc(&ct->ct_general.use);
	skb->nfct = &ct->ct_general;
	skb->nfctinfo = IP_CT_NEW;

	return XT_CONTINUE;
}

static unsigned int xt_ct_target_v1(struct sk_buff *skb,
				    const struct xt_action_param *par)
{
	const struct xt_ct_target_info_v1 *info = par->targinfo;
	struct nf_conn *ct = info->ct;

	/* Previously seen (loopback)? Ignore. */
	if (skb->nfct != NULL)
		return XT_CONTINUE;

	atomic_inc(&ct->ct_general.use);
	skb->nfct = &ct->ct_general;
	skb->nfctinfo = IP_CT_NEW;

	return XT_CONTINUE;
}

static u8 xt_ct_find_proto(const struct xt_tgchk_param *par)
{
	if (par->family == NFPROTO_IPV4) {
		const struct ipt_entry *e = par->entryinfo;

		if (e->ip.invflags & IPT_INV_PROTO)
			return 0;
		return e->ip.proto;
	} else if (par->family == NFPROTO_IPV6) {
		const struct ip6t_entry *e = par->entryinfo;

		if (e->ipv6.invflags & IP6T_INV_PROTO)
			return 0;
		return e->ipv6.proto;
	} else
		return 0;
}

static int xt_ct_tg_check_v0(const struct xt_tgchk_param *par)
{
	struct xt_ct_target_info *info = par->targinfo;
	struct nf_conntrack_tuple t;
	struct nf_conn_help *help;
	struct nf_conn *ct;
	int ret = 0;
	u8 proto;

	if (info->flags & ~XT_CT_NOTRACK)
		return -EINVAL;

	if (info->flags & XT_CT_NOTRACK) {
		ct = nf_ct_untracked_get();
		atomic_inc(&ct->ct_general.use);
		goto out;
	}

#ifndef CONFIG_NF_CONNTRACK_ZONES
	if (info->zone)
		goto err1;
#endif

	ret = nf_ct_l3proto_try_module_get(par->family);
	if (ret < 0)
		goto err1;

	memset(&t, 0, sizeof(t));
	ct = nf_conntrack_alloc(par->net, info->zone, &t, &t, GFP_KERNEL);
	ret = PTR_ERR(ct);
	if (IS_ERR(ct))
		goto err2;

	ret = 0;
	if ((info->ct_events || info->exp_events) &&
	    !nf_ct_ecache_ext_add(ct, info->ct_events, info->exp_events,
				  GFP_KERNEL))
		goto err3;

	if (info->helper[0]) {
		ret = -ENOENT;
		proto = xt_ct_find_proto(par);
		if (!proto) {
			pr_info("You must specify a L4 protocol, "
				"and not use inversions on it.\n");
			goto err3;
		}

		ret = -ENOMEM;
		help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
		if (help == NULL)
			goto err3;

		ret = -ENOENT;
		help->helper = nf_conntrack_helper_try_module_get(info->helper,
								  par->family,
								  proto);
		if (help->helper == NULL) {
			pr_info("No such helper \"%s\"\n", info->helper);
			goto err3;
		}
	}

	__set_bit(IPS_TEMPLATE_BIT, &ct->status);
	__set_bit(IPS_CONFIRMED_BIT, &ct->status);
out:
	info->ct = ct;
	return 0;

err3:
	nf_conntrack_free(ct);
err2:
	nf_ct_l3proto_module_put(par->family);
err1:
	return ret;
}

#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
static void __xt_ct_tg_timeout_put(struct ctnl_timeout *timeout)
{
	typeof(nf_ct_timeout_put_hook) timeout_put;

	timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
	if (timeout_put)
		timeout_put(timeout);
}
#endif

static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
{
	struct xt_ct_target_info_v1 *info = par->targinfo;
	struct nf_conntrack_tuple t;
	struct nf_conn_help *help;
	struct nf_conn *ct;
	int ret = 0;
	u8 proto;
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	struct ctnl_timeout *timeout;
#endif
	if (info->flags & ~XT_CT_NOTRACK)
		return -EINVAL;

	if (info->flags & XT_CT_NOTRACK) {
		ct = nf_ct_untracked_get();
		atomic_inc(&ct->ct_general.use);
		goto out;
	}

#ifndef CONFIG_NF_CONNTRACK_ZONES
	if (info->zone)
		goto err1;
#endif

	ret = nf_ct_l3proto_try_module_get(par->family);
	if (ret < 0)
		goto err1;

	memset(&t, 0, sizeof(t));
	ct = nf_conntrack_alloc(par->net, info->zone, &t, &t, GFP_KERNEL);
	ret = PTR_ERR(ct);
	if (IS_ERR(ct))
		goto err2;

	ret = 0;
	if ((info->ct_events || info->exp_events) &&
	    !nf_ct_ecache_ext_add(ct, info->ct_events, info->exp_events,
				  GFP_KERNEL))
		goto err3;

	if (info->helper[0]) {
		ret = -ENOENT;
		proto = xt_ct_find_proto(par);
		if (!proto) {
			pr_info("You must specify a L4 protocol, "
				"and not use inversions on it.\n");
			goto err3;
		}

		ret = -ENOMEM;
		help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
		if (help == NULL)
			goto err3;

		ret = -ENOENT;
		help->helper = nf_conntrack_helper_try_module_get(info->helper,
								  par->family,
								  proto);
		if (help->helper == NULL) {
			pr_info("No such helper \"%s\"\n", info->helper);
			goto err3;
		}
	}

#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	if (info->timeout[0]) {
		typeof(nf_ct_timeout_find_get_hook) timeout_find_get;
		struct nf_conn_timeout *timeout_ext;

		rcu_read_lock();
		timeout_find_get =
			rcu_dereference(nf_ct_timeout_find_get_hook);

		if (timeout_find_get) {
			const struct ipt_entry *e = par->entryinfo;
			struct nf_conntrack_l4proto *l4proto;

			if (e->ip.invflags & IPT_INV_PROTO) {
				ret = -EINVAL;
				pr_info("You cannot use inversion on "
					 "L4 protocol\n");
				goto err4;
			}
			timeout = timeout_find_get(info->timeout);
			if (timeout == NULL) {
				ret = -ENOENT;
				pr_info("No such timeout policy \"%s\"\n",
					info->timeout);
				goto err4;
			}
			if (timeout->l3num != par->family) {
				ret = -EINVAL;
				pr_info("Timeout policy `%s' can only be "
					"used by L3 protocol number %d\n",
					info->timeout, timeout->l3num);
				goto err5;
			}
			/* Make sure the timeout policy matches any existing
			 * protocol tracker, otherwise default to generic.
			 */
			l4proto = __nf_ct_l4proto_find(par->family,
						       e->ip.proto);
			if (timeout->l4proto->l4proto != l4proto->l4proto) {
				ret = -EINVAL;
				pr_info("Timeout policy `%s' can only be "
					"used by L4 protocol number %d\n",
					info->timeout,
					timeout->l4proto->l4proto);
				goto err5;
			}
			timeout_ext = nf_ct_timeout_ext_add(ct, timeout,
							    GFP_ATOMIC);
			if (timeout_ext == NULL) {
				ret = -ENOMEM;
				goto err5;
			}
		} else {
			ret = -ENOENT;
			pr_info("Timeout policy base is empty\n");
			goto err4;
		}
		rcu_read_unlock();
	}
#endif

	__set_bit(IPS_TEMPLATE_BIT, &ct->status);
	__set_bit(IPS_CONFIRMED_BIT, &ct->status);
out:
	info->ct = ct;
	return 0;

#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
err5:
	__xt_ct_tg_timeout_put(timeout);
err4:
	rcu_read_unlock();
#endif
err3:
	nf_conntrack_free(ct);
err2:
	nf_ct_l3proto_module_put(par->family);
err1:
	return ret;
}

static void xt_ct_tg_destroy_v0(const struct xt_tgdtor_param *par)
{
	struct xt_ct_target_info *info = par->targinfo;
	struct nf_conn *ct = info->ct;
	struct nf_conn_help *help;

	if (!nf_ct_is_untracked(ct)) {
		help = nfct_help(ct);
		if (help)
			module_put(help->helper->me);

		nf_ct_l3proto_module_put(par->family);
	}
	nf_ct_put(info->ct);
}

static void xt_ct_tg_destroy_v1(const struct xt_tgdtor_param *par)
{
	struct xt_ct_target_info_v1 *info = par->targinfo;
	struct nf_conn *ct = info->ct;
	struct nf_conn_help *help;
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	struct nf_conn_timeout *timeout_ext;
	typeof(nf_ct_timeout_put_hook) timeout_put;
#endif
	if (!nf_ct_is_untracked(ct)) {
		help = nfct_help(ct);
		if (help)
			module_put(help->helper->me);

		nf_ct_l3proto_module_put(par->family);

#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
		rcu_read_lock();
		timeout_put = rcu_dereference(nf_ct_timeout_put_hook);

		if (timeout_put) {
			timeout_ext = nf_ct_timeout_find(ct);
			if (timeout_ext)
				timeout_put(timeout_ext->timeout);
		}
		rcu_read_unlock();
#endif
	}
	nf_ct_put(info->ct);
}

static struct xt_target xt_ct_tg_reg[] __read_mostly = {
	{
		.name		= "CT",
		.family		= NFPROTO_UNSPEC,
		.targetsize	= sizeof(struct xt_ct_target_info),
		.checkentry	= xt_ct_tg_check_v0,
		.destroy	= xt_ct_tg_destroy_v0,
		.target		= xt_ct_target_v0,
		.table		= "raw",
		.me		= THIS_MODULE,
	},
	{
		.name		= "CT",
		.family		= NFPROTO_UNSPEC,
		.revision	= 1,
		.targetsize	= sizeof(struct xt_ct_target_info_v1),
		.checkentry	= xt_ct_tg_check_v1,
		.destroy	= xt_ct_tg_destroy_v1,
		.target		= xt_ct_target_v1,
		.table		= "raw",
		.me		= THIS_MODULE,
	},
};

static int __init xt_ct_tg_init(void)
{
	return xt_register_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg));
}

static void __exit xt_ct_tg_exit(void)
{
	xt_unregister_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg));
}

module_init(xt_ct_tg_init);
module_exit(xt_ct_tg_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Xtables: connection tracking target");
MODULE_ALIAS("ipt_CT");
MODULE_ALIAS("ip6t_CT");
Commit	Line	Data
84f3bb9a PM	1	/*
	2	* Copyright (c) 2010 Patrick McHardy <kaber@trash.net>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
a7fed762	8	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
84f3bb9a	9	#include <linux/module.h>
5a0e3ad6	10	#include <linux/gfp.h>
84f3bb9a	11	#include <linux/skbuff.h>
84f3bb9a PM	12	#include <linux/netfilter_ipv4/ip_tables.h>
	13	#include <linux/netfilter_ipv6/ip6_tables.h>
	14	#include <linux/netfilter/x_tables.h>
	15	#include <linux/netfilter/xt_CT.h>
	16	#include <net/netfilter/nf_conntrack.h>
eeb4cb95	17	#include <net/netfilter/nf_conntrack_l4proto.h>
84f3bb9a PM	18	#include <net/netfilter/nf_conntrack_helper.h>
84f3bb9a PM	19	#include <net/netfilter/nf_conntrack_ecache.h>
24de58f4	20	#include <net/netfilter/nf_conntrack_timeout.h>
5d0aa2cc	21	#include <net/netfilter/nf_conntrack_zones.h>
84f3bb9a	22
24de58f4 PNA	23	static unsigned int xt_ct_target_v0(struct sk_buff *skb,
24de58f4 PNA	24	const struct xt_action_param *par)
84f3bb9a PM	25	{
	26	const struct xt_ct_target_info *info = par->targinfo;
	27	struct nf_conn *ct = info->ct;
	28
	29	/* Previously seen (loopback)? Ignore. */
	30	if (skb->nfct != NULL)
	31	return XT_CONTINUE;
	32
	33	atomic_inc(&ct->ct_general.use);
	34	skb->nfct = &ct->ct_general;
	35	skb->nfctinfo = IP_CT_NEW;
	36
	37	return XT_CONTINUE;
	38	}
	39
24de58f4 PNA	40	static unsigned int xt_ct_target_v1(struct sk_buff *skb,
	41	const struct xt_action_param *par)
	42	{
	43	const struct xt_ct_target_info_v1 *info = par->targinfo;
	44	struct nf_conn *ct = info->ct;
	45
	46	/* Previously seen (loopback)? Ignore. */
	47	if (skb->nfct != NULL)
	48	return XT_CONTINUE;
	49
	50	atomic_inc(&ct->ct_general.use);
	51	skb->nfct = &ct->ct_general;
	52	skb->nfctinfo = IP_CT_NEW;
	53
	54	return XT_CONTINUE;
	55	}
	56
84f3bb9a PM	57	static u8 xt_ct_find_proto(const struct xt_tgchk_param *par)
84f3bb9a PM	58	{
076f7839	59	if (par->family == NFPROTO_IPV4) {
84f3bb9a PM	60	const struct ipt_entry *e = par->entryinfo;
	61
	62	if (e->ip.invflags & IPT_INV_PROTO)
	63	return 0;
	64	return e->ip.proto;
076f7839	65	} else if (par->family == NFPROTO_IPV6) {
84f3bb9a PM	66	const struct ip6t_entry *e = par->entryinfo;
	67
	68	if (e->ipv6.invflags & IP6T_INV_PROTO)
	69	return 0;
	70	return e->ipv6.proto;
	71	} else
	72	return 0;
	73	}
	74
24de58f4	75	static int xt_ct_tg_check_v0(const struct xt_tgchk_param *par)
84f3bb9a PM	76	{
	77	struct xt_ct_target_info *info = par->targinfo;
	78	struct nf_conntrack_tuple t;
	79	struct nf_conn_help *help;
	80	struct nf_conn *ct;
4a5a5c73	81	int ret = 0;
84f3bb9a PM	82	u8 proto;
84f3bb9a PM	83
9bf04646 PNA	84	if (info->flags & ~XT_CT_NOTRACK)
9bf04646 PNA	85	return -EINVAL;
84f3bb9a PM	86
84f3bb9a PM	87	if (info->flags & XT_CT_NOTRACK) {
5bfddbd4	88	ct = nf_ct_untracked_get();
84f3bb9a PM	89	atomic_inc(&ct->ct_general.use);
	90	goto out;
	91	}
	92
5d0aa2cc PM	93	#ifndef CONFIG_NF_CONNTRACK_ZONES
	94	if (info->zone)
	95	goto err1;
	96	#endif
	97
4a5a5c73 JE	98	ret = nf_ct_l3proto_try_module_get(par->family);
4a5a5c73 JE	99	if (ret < 0)
84f3bb9a PM	100	goto err1;
	101
	102	memset(&t, 0, sizeof(t));
5d0aa2cc	103	ct = nf_conntrack_alloc(par->net, info->zone, &t, &t, GFP_KERNEL);
4a5a5c73	104	ret = PTR_ERR(ct);
84f3bb9a PM	105	if (IS_ERR(ct))
	106	goto err2;
	107
4a5a5c73	108	ret = 0;
84f3bb9a PM	109	if ((info->ct_events \|\| info->exp_events) &&
	110	!nf_ct_ecache_ext_add(ct, info->ct_events, info->exp_events,
	111	GFP_KERNEL))
	112	goto err3;
	113
9bf04646	114	if (info->helper[0]) {
4a5a5c73	115	ret = -ENOENT;
84f3bb9a	116	proto = xt_ct_find_proto(par);
a7fed762 JE	117	if (!proto) {
	118	pr_info("You must specify a L4 protocol, "
	119	"and not use inversions on it.\n");
84f3bb9a	120	goto err3;
a7fed762	121	}
84f3bb9a	122
4a5a5c73	123	ret = -ENOMEM;
84f3bb9a PM	124	help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
	125	if (help == NULL)
	126	goto err3;
	127
4a5a5c73	128	ret = -ENOENT;
84f3bb9a PM	129	help->helper = nf_conntrack_helper_try_module_get(info->helper,
	130	par->family,
	131	proto);
a7fed762 JE	132	if (help->helper == NULL) {
a7fed762 JE	133	pr_info("No such helper \"%s\"\n", info->helper);
84f3bb9a	134	goto err3;
a7fed762	135	}
84f3bb9a PM	136	}
	137
	138	__set_bit(IPS_TEMPLATE_BIT, &ct->status);
	139	__set_bit(IPS_CONFIRMED_BIT, &ct->status);
	140	out:
	141	info->ct = ct;
d6b00a53	142	return 0;
84f3bb9a PM	143
	144	err3:
	145	nf_conntrack_free(ct);
	146	err2:
	147	nf_ct_l3proto_module_put(par->family);
	148	err1:
4a5a5c73	149	return ret;
84f3bb9a PM	150	}
84f3bb9a PM	151
ee14186f PNA	152	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	153	static void __xt_ct_tg_timeout_put(struct ctnl_timeout *timeout)
	154	{
	155	typeof(nf_ct_timeout_put_hook) timeout_put;
	156
	157	timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
	158	if (timeout_put)
	159	timeout_put(timeout);
	160	}
	161	#endif
	162
24de58f4 PNA	163	static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
	164	{
	165	struct xt_ct_target_info_v1 *info = par->targinfo;
	166	struct nf_conntrack_tuple t;
	167	struct nf_conn_help *help;
	168	struct nf_conn *ct;
	169	int ret = 0;
	170	u8 proto;
ee14186f PNA	171	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	172	struct ctnl_timeout *timeout;
	173	#endif
24de58f4 PNA	174	if (info->flags & ~XT_CT_NOTRACK)
	175	return -EINVAL;
	176
	177	if (info->flags & XT_CT_NOTRACK) {
	178	ct = nf_ct_untracked_get();
	179	atomic_inc(&ct->ct_general.use);
	180	goto out;
	181	}
	182
	183	#ifndef CONFIG_NF_CONNTRACK_ZONES
	184	if (info->zone)
	185	goto err1;
	186	#endif
	187
	188	ret = nf_ct_l3proto_try_module_get(par->family);
	189	if (ret < 0)
	190	goto err1;
	191
	192	memset(&t, 0, sizeof(t));
	193	ct = nf_conntrack_alloc(par->net, info->zone, &t, &t, GFP_KERNEL);
	194	ret = PTR_ERR(ct);
	195	if (IS_ERR(ct))
	196	goto err2;
	197
	198	ret = 0;
	199	if ((info->ct_events \|\| info->exp_events) &&
	200	!nf_ct_ecache_ext_add(ct, info->ct_events, info->exp_events,
	201	GFP_KERNEL))
	202	goto err3;
	203
	204	if (info->helper[0]) {
	205	ret = -ENOENT;
	206	proto = xt_ct_find_proto(par);
	207	if (!proto) {
	208	pr_info("You must specify a L4 protocol, "
	209	"and not use inversions on it.\n");
	210	goto err3;
	211	}
	212
	213	ret = -ENOMEM;
	214	help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
	215	if (help == NULL)
	216	goto err3;
	217
	218	ret = -ENOENT;
	219	help->helper = nf_conntrack_helper_try_module_get(info->helper,
	220	par->family,
	221	proto);
	222	if (help->helper == NULL) {
	223	pr_info("No such helper \"%s\"\n", info->helper);
	224	goto err3;
	225	}
	226	}
	227
	228	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
6cf51852	229	if (info->timeout[0]) {
24de58f4	230	typeof(nf_ct_timeout_find_get_hook) timeout_find_get;
24de58f4 PNA	231	struct nf_conn_timeout *timeout_ext;
24de58f4 PNA	232
1ac0bf99	233	rcu_read_lock();
24de58f4 PNA	234	timeout_find_get =
	235	rcu_dereference(nf_ct_timeout_find_get_hook);
	236
	237	if (timeout_find_get) {
	238	const struct ipt_entry *e = par->entryinfo;
eeb4cb95	239	struct nf_conntrack_l4proto *l4proto;
24de58f4 PNA	240
	241	if (e->ip.invflags & IPT_INV_PROTO) {
	242	ret = -EINVAL;
	243	pr_info("You cannot use inversion on "
	244	"L4 protocol\n");
1ac0bf99	245	goto err4;
24de58f4 PNA	246	}
	247	timeout = timeout_find_get(info->timeout);
	248	if (timeout == NULL) {
	249	ret = -ENOENT;
	250	pr_info("No such timeout policy \"%s\"\n",
	251	info->timeout);
1ac0bf99	252	goto err4;
24de58f4 PNA	253	}
	254	if (timeout->l3num != par->family) {
	255	ret = -EINVAL;
	256	pr_info("Timeout policy `%s' can only be "
	257	"used by L3 protocol number %d\n",
	258	info->timeout, timeout->l3num);
ee14186f	259	goto err5;
24de58f4	260	}
eeb4cb95 PNA	261	/* Make sure the timeout policy matches any existing
	262	* protocol tracker, otherwise default to generic.
	263	*/
	264	l4proto = __nf_ct_l4proto_find(par->family,
	265	e->ip.proto);
	266	if (timeout->l4proto->l4proto != l4proto->l4proto) {
24de58f4 PNA	267	ret = -EINVAL;
	268	pr_info("Timeout policy `%s' can only be "
	269	"used by L4 protocol number %d\n",
c1ebd7df PNA	270	info->timeout,
c1ebd7df PNA	271	timeout->l4proto->l4proto);
ee14186f	272	goto err5;
24de58f4 PNA	273	}
24de58f4 PNA	274	timeout_ext = nf_ct_timeout_ext_add(ct, timeout,
ca53e440	275	GFP_ATOMIC);
24de58f4 PNA	276	if (timeout_ext == NULL) {
24de58f4 PNA	277	ret = -ENOMEM;
ee14186f	278	goto err5;
24de58f4 PNA	279	}
	280	} else {
	281	ret = -ENOENT;
	282	pr_info("Timeout policy base is empty\n");
1ac0bf99	283	goto err4;
24de58f4	284	}
1ac0bf99	285	rcu_read_unlock();
24de58f4 PNA	286	}
	287	#endif
	288
	289	__set_bit(IPS_TEMPLATE_BIT, &ct->status);
	290	__set_bit(IPS_CONFIRMED_BIT, &ct->status);
	291	out:
	292	info->ct = ct;
	293	return 0;
	294
44b52bcc	295	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
ee14186f PNA	296	err5:
ee14186f PNA	297	__xt_ct_tg_timeout_put(timeout);
1ac0bf99 PNA	298	err4:
1ac0bf99 PNA	299	rcu_read_unlock();
44b52bcc	300	#endif
24de58f4 PNA	301	err3:
	302	nf_conntrack_free(ct);
	303	err2:
	304	nf_ct_l3proto_module_put(par->family);
	305	err1:
	306	return ret;
	307	}
	308
	309	static void xt_ct_tg_destroy_v0(const struct xt_tgdtor_param *par)
84f3bb9a PM	310	{
	311	struct xt_ct_target_info *info = par->targinfo;
	312	struct nf_conn *ct = info->ct;
	313	struct nf_conn_help *help;
	314
5bfddbd4	315	if (!nf_ct_is_untracked(ct)) {
84f3bb9a PM	316	help = nfct_help(ct);
	317	if (help)
	318	module_put(help->helper->me);
	319
	320	nf_ct_l3proto_module_put(par->family);
	321	}
	322	nf_ct_put(info->ct);
	323	}
	324
24de58f4 PNA	325	static void xt_ct_tg_destroy_v1(const struct xt_tgdtor_param *par)
	326	{
	327	struct xt_ct_target_info_v1 *info = par->targinfo;
	328	struct nf_conn *ct = info->ct;
	329	struct nf_conn_help *help;
	330	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	331	struct nf_conn_timeout *timeout_ext;
	332	typeof(nf_ct_timeout_put_hook) timeout_put;
	333	#endif
	334	if (!nf_ct_is_untracked(ct)) {
	335	help = nfct_help(ct);
	336	if (help)
	337	module_put(help->helper->me);
	338
	339	nf_ct_l3proto_module_put(par->family);
	340
	341	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
1ac0bf99	342	rcu_read_lock();
24de58f4 PNA	343	timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
	344
	345	if (timeout_put) {
	346	timeout_ext = nf_ct_timeout_find(ct);
	347	if (timeout_ext)
	348	timeout_put(timeout_ext->timeout);
	349	}
1ac0bf99	350	rcu_read_unlock();
24de58f4 PNA	351	#endif
	352	}
	353	nf_ct_put(info->ct);
	354	}
	355
	356	static struct xt_target xt_ct_tg_reg[] __read_mostly = {
	357	{
	358	.name = "CT",
	359	.family = NFPROTO_UNSPEC,
	360	.targetsize = sizeof(struct xt_ct_target_info),
	361	.checkentry = xt_ct_tg_check_v0,
	362	.destroy = xt_ct_tg_destroy_v0,
	363	.target = xt_ct_target_v0,
	364	.table = "raw",
	365	.me = THIS_MODULE,
	366	},
	367	{
	368	.name = "CT",
	369	.family = NFPROTO_UNSPEC,
	370	.revision = 1,
	371	.targetsize = sizeof(struct xt_ct_target_info_v1),
	372	.checkentry = xt_ct_tg_check_v1,
	373	.destroy = xt_ct_tg_destroy_v1,
	374	.target = xt_ct_target_v1,
	375	.table = "raw",
	376	.me = THIS_MODULE,
	377	},
84f3bb9a PM	378	};
	379
	380	static int __init xt_ct_tg_init(void)
	381	{
24de58f4	382	return xt_register_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg));
84f3bb9a PM	383	}
	384
	385	static void __exit xt_ct_tg_exit(void)
	386	{
24de58f4	387	xt_unregister_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg));
84f3bb9a PM	388	}
	389
	390	module_init(xt_ct_tg_init);
	391	module_exit(xt_ct_tg_exit);
	392
	393	MODULE_LICENSE("GPL");
	394	MODULE_DESCRIPTION("Xtables: connection tracking target");
	395	MODULE_ALIAS("ipt_CT");
	396	MODULE_ALIAS("ip6t_CT");