[mirror_ubuntu-artful-kernel.git] / net / sched / act_ipt.c

/*
 * net/sched/ipt.c     iptables target interface
 *
 *TODO: Add other tables. For now we only support the ipv4 table targets
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Copyright:	Jamal Hadi Salim (2002-13)
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <linux/tc_act/tc_ipt.h>
#include <net/tc_act/tc_ipt.h>

#include <linux/netfilter_ipv4/ip_tables.h>


#define IPT_TAB_MASK     15
static struct tcf_hashinfo ipt_hash_info;

static int ipt_init_target(struct xt_entry_target *t, char *table, unsigned int hook)
{
	struct xt_tgchk_param par;
	struct xt_target *target;
	int ret = 0;

	target = xt_request_find_target(AF_INET, t->u.user.name,
					t->u.user.revision);
	if (IS_ERR(target))
		return PTR_ERR(target);

	t->u.kernel.target = target;
	par.table     = table;
	par.entryinfo = NULL;
	par.target    = target;
	par.targinfo  = t->data;
	par.hook_mask = hook;
	par.family    = NFPROTO_IPV4;

	ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
	if (ret < 0) {
		module_put(t->u.kernel.target->me);
		return ret;
	}
	return 0;
}

static void ipt_destroy_target(struct xt_entry_target *t)
{
	struct xt_tgdtor_param par = {
		.target   = t->u.kernel.target,
		.targinfo = t->data,
	};
	if (par.target->destroy != NULL)
		par.target->destroy(&par);
	module_put(par.target->me);
}

static int tcf_ipt_release(struct tc_action *a, int bind)
{
	struct tcf_ipt *ipt = to_ipt(a);
	int ret = 0;
	if (ipt) {
		if (bind)
			ipt->tcf_bindcnt--;
		ipt->tcf_refcnt--;
		if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
			ipt_destroy_target(ipt->tcfi_t);
			kfree(ipt->tcfi_tname);
			kfree(ipt->tcfi_t);
			tcf_hash_destroy(a);
			ret = ACT_P_DELETED;
		}
	}
	return ret;
}

static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
	[TCA_IPT_TABLE]	= { .type = NLA_STRING, .len = IFNAMSIZ },
	[TCA_IPT_HOOK]	= { .type = NLA_U32 },
	[TCA_IPT_INDEX]	= { .type = NLA_U32 },
	[TCA_IPT_TARG]	= { .len = sizeof(struct xt_entry_target) },
};

static int tcf_ipt_init(struct net *net, struct nlattr *nla, struct nlattr *est,
			struct tc_action *a, int ovr, int bind)
{
	struct nlattr *tb[TCA_IPT_MAX + 1];
	struct tcf_ipt *ipt;
	struct xt_entry_target *td, *t;
	char *tname;
	int ret = 0, err;
	u32 hook = 0;
	u32 index = 0;

	if (nla == NULL)
		return -EINVAL;

	err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
	if (err < 0)
		return err;

	if (tb[TCA_IPT_HOOK] == NULL)
		return -EINVAL;
	if (tb[TCA_IPT_TARG] == NULL)
		return -EINVAL;

	td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
		return -EINVAL;

	if (tb[TCA_IPT_INDEX] != NULL)
		index = nla_get_u32(tb[TCA_IPT_INDEX]);

	if (!tcf_hash_check(index, a, bind) ) {
		ret = tcf_hash_create(index, est, a, sizeof(*ipt), bind);
		if (ret)
			return ret;
		ret = ACT_P_CREATED;
	} else {
		if (bind)/* dont override defaults */
			return 0;
		tcf_ipt_release(a, bind);

		if (!ovr)
			return -EEXIST;
	}
	ipt = to_ipt(a);

	hook = nla_get_u32(tb[TCA_IPT_HOOK]);

	err = -ENOMEM;
	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
	if (unlikely(!tname))
		goto err1;
	if (tb[TCA_IPT_TABLE] == NULL ||
	    nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
		strcpy(tname, "mangle");

	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
	if (unlikely(!t))
		goto err2;

	err = ipt_init_target(t, tname, hook);
	if (err < 0)
		goto err3;

	spin_lock_bh(&ipt->tcf_lock);
	if (ret != ACT_P_CREATED) {
		ipt_destroy_target(ipt->tcfi_t);
		kfree(ipt->tcfi_tname);
		kfree(ipt->tcfi_t);
	}
	ipt->tcfi_tname = tname;
	ipt->tcfi_t     = t;
	ipt->tcfi_hook  = hook;
	spin_unlock_bh(&ipt->tcf_lock);
	if (ret == ACT_P_CREATED)
		tcf_hash_insert(a);
	return ret;

err3:
	kfree(t);
err2:
	kfree(tname);
err1:
	if (ret == ACT_P_CREATED)
		tcf_hash_cleanup(a, est);
	return err;
}

static int tcf_ipt(struct sk_buff *skb, const struct tc_action *a,
		   struct tcf_result *res)
{
	int ret = 0, result = 0;
	struct tcf_ipt *ipt = a->priv;
	struct xt_action_param par;

	if (skb_unclone(skb, GFP_ATOMIC))
		return TC_ACT_UNSPEC;

	spin_lock(&ipt->tcf_lock);

	ipt->tcf_tm.lastuse = jiffies;
	bstats_update(&ipt->tcf_bstats, skb);

	/* yes, we have to worry about both in and out dev
	 * worry later - danger - this API seems to have changed
	 * from earlier kernels
	 */
	par.in       = skb->dev;
	par.out      = NULL;
	par.hooknum  = ipt->tcfi_hook;
	par.target   = ipt->tcfi_t->u.kernel.target;
	par.targinfo = ipt->tcfi_t->data;
	ret = par.target->target(skb, &par);

	switch (ret) {
	case NF_ACCEPT:
		result = TC_ACT_OK;
		break;
	case NF_DROP:
		result = TC_ACT_SHOT;
		ipt->tcf_qstats.drops++;
		break;
	case XT_CONTINUE:
		result = TC_ACT_PIPE;
		break;
	default:
		net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
				       ret);
		result = TC_POLICE_OK;
		break;
	}
	spin_unlock(&ipt->tcf_lock);
	return result;

}

static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
	unsigned char *b = skb_tail_pointer(skb);
	struct tcf_ipt *ipt = a->priv;
	struct xt_entry_target *t;
	struct tcf_t tm;
	struct tc_cnt c;

	/* for simple targets kernel size == user size
	 * user name = target name
	 * for foolproof you need to not assume this
	 */

	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
	if (unlikely(!t))
		goto nla_put_failure;

	c.bindcnt = ipt->tcf_bindcnt - bind;
	c.refcnt = ipt->tcf_refcnt - ref;
	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);

	if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) ||
	    nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) ||
	    nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) ||
	    nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) ||
	    nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
		goto nla_put_failure;
	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
	if (nla_put(skb, TCA_IPT_TM, sizeof (tm), &tm))
		goto nla_put_failure;
	kfree(t);
	return skb->len;

nla_put_failure:
	nlmsg_trim(skb, b);
	kfree(t);
	return -1;
}

static struct tc_action_ops act_ipt_ops = {
	.kind		=	"ipt",
	.hinfo		=	&ipt_hash_info,
	.type		=	TCA_ACT_IPT,
	.owner		=	THIS_MODULE,
	.act		=	tcf_ipt,
	.dump		=	tcf_ipt_dump,
	.cleanup	=	tcf_ipt_release,
	.init		=	tcf_ipt_init,
};

static struct tc_action_ops act_xt_ops = {
	.kind		=	"xt",
	.hinfo		=	&ipt_hash_info,
	.type		=	TCA_ACT_XT,
	.owner		=	THIS_MODULE,
	.act		=	tcf_ipt,
	.dump		=	tcf_ipt_dump,
	.cleanup	=	tcf_ipt_release,
	.init		=	tcf_ipt_init,
};

MODULE_AUTHOR("Jamal Hadi Salim(2002-13)");
MODULE_DESCRIPTION("Iptables target actions");
MODULE_LICENSE("GPL");
MODULE_ALIAS("act_xt");

static int __init ipt_init_module(void)
{
	int ret1, ret2, err;
	err = tcf_hashinfo_init(&ipt_hash_info, IPT_TAB_MASK);
	if (err)
		return err;

	ret1 = tcf_register_action(&act_xt_ops);
	if (ret1 < 0)
		printk("Failed to load xt action\n");
	ret2 = tcf_register_action(&act_ipt_ops);
	if (ret2 < 0)
		printk("Failed to load ipt action\n");

	if (ret1 < 0 && ret2 < 0) {
		tcf_hashinfo_destroy(&ipt_hash_info);
		return ret1;
	} else
		return 0;
}

static void __exit ipt_cleanup_module(void)
{
	tcf_unregister_action(&act_xt_ops);
	tcf_unregister_action(&act_ipt_ops);
	tcf_hashinfo_destroy(&ipt_hash_info);
}

module_init(ipt_init_module);
module_exit(ipt_cleanup_module);
Commit	Line	Data
1da177e4	1	/*
e87cc472	2	* net/sched/ipt.c iptables target interface
1da177e4 LT	3	*
	4	*TODO: Add other tables. For now we only support the ipv4 table targets
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*
0dcffd09	11	* Copyright: Jamal Hadi Salim (2002-13)
1da177e4 LT	12	*/
1da177e4 LT	13
1da177e4 LT	14	#include <linux/types.h>
1da177e4 LT	15	#include <linux/kernel.h>
1da177e4	16	#include <linux/string.h>
1da177e4	17	#include <linux/errno.h>
1da177e4 LT	18	#include <linux/skbuff.h>
	19	#include <linux/rtnetlink.h>
	20	#include <linux/module.h>
	21	#include <linux/init.h>
5a0e3ad6	22	#include <linux/slab.h>
dc5fc579	23	#include <net/netlink.h>
1da177e4 LT	24	#include <net/pkt_sched.h>
	25	#include <linux/tc_act/tc_ipt.h>
	26	#include <net/tc_act/tc_ipt.h>
	27
	28	#include <linux/netfilter_ipv4/ip_tables.h>
	29
1da177e4	30
e9ce1cd3	31	#define IPT_TAB_MASK 15
369ba567	32	static struct tcf_hashinfo ipt_hash_info;
1da177e4	33
87a2e70d	34	static int ipt_init_target(struct xt_entry_target t, char table, unsigned int hook)
1da177e4	35	{
af5d6dc2	36	struct xt_tgchk_param par;
e60a13e0	37	struct xt_target *target;
1da177e4 LT	38	int ret = 0;
1da177e4 LT	39
239a87c8 PM	40	target = xt_request_find_target(AF_INET, t->u.user.name,
239a87c8 PM	41	t->u.user.revision);
d2a7b6ba JE	42	if (IS_ERR(target))
d2a7b6ba JE	43	return PTR_ERR(target);
1da177e4	44
1da177e4	45	t->u.kernel.target = target;
af5d6dc2 JE	46	par.table = table;
	47	par.entryinfo = NULL;
	48	par.target = target;
	49	par.targinfo = t->data;
	50	par.hook_mask = hook;
916a917d	51	par.family = NFPROTO_IPV4;
1da177e4	52
916a917d	53	ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
367c6790	54	if (ret < 0) {
239a87c8	55	module_put(t->u.kernel.target->me);
18118cdb	56	return ret;
239a87c8	57	}
367c6790	58	return 0;
1da177e4 LT	59	}
1da177e4 LT	60
87a2e70d	61	static void ipt_destroy_target(struct xt_entry_target *t)
1da177e4	62	{
a2df1648 JE	63	struct xt_tgdtor_param par = {
	64	.target = t->u.kernel.target,
	65	.targinfo = t->data,
	66	};
	67	if (par.target->destroy != NULL)
	68	par.target->destroy(&par);
	69	module_put(par.target->me);
1da177e4 LT	70	}
1da177e4 LT	71
86062033	72	static int tcf_ipt_release(struct tc_action *a, int bind)
1da177e4	73	{
86062033	74	struct tcf_ipt *ipt = to_ipt(a);
1da177e4	75	int ret = 0;
e9ce1cd3	76	if (ipt) {
1da177e4	77	if (bind)
e9ce1cd3 DM	78	ipt->tcf_bindcnt--;
	79	ipt->tcf_refcnt--;
	80	if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
	81	ipt_destroy_target(ipt->tcfi_t);
	82	kfree(ipt->tcfi_tname);
	83	kfree(ipt->tcfi_t);
86062033	84	tcf_hash_destroy(a);
1da177e4 LT	85	ret = ACT_P_DELETED;
	86	}
	87	}
	88	return ret;
	89	}
	90
53b2bf3f PM	91	static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
	92	[TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
	93	[TCA_IPT_HOOK] = { .type = NLA_U32 },
	94	[TCA_IPT_INDEX] = { .type = NLA_U32 },
87a2e70d	95	[TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
53b2bf3f PM	96	};
53b2bf3f PM	97
c1b52739	98	static int tcf_ipt_init(struct net net, struct nlattr nla, struct nlattr *est,
e9ce1cd3	99	struct tc_action *a, int ovr, int bind)
1da177e4	100	{
7ba699c6	101	struct nlattr *tb[TCA_IPT_MAX + 1];
e9ce1cd3	102	struct tcf_ipt *ipt;
87a2e70d	103	struct xt_entry_target td, t;
1da177e4 LT	104	char *tname;
	105	int ret = 0, err;
	106	u32 hook = 0;
	107	u32 index = 0;
	108
cee63723	109	if (nla == NULL)
1da177e4 LT	110	return -EINVAL;
1da177e4 LT	111
53b2bf3f	112	err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
cee63723 PM	113	if (err < 0)
	114	return err;
	115
53b2bf3f	116	if (tb[TCA_IPT_HOOK] == NULL)
1da177e4	117	return -EINVAL;
53b2bf3f	118	if (tb[TCA_IPT_TARG] == NULL)
1da177e4	119	return -EINVAL;
53b2bf3f	120
87a2e70d	121	td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
7ba699c6	122	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
1da177e4 LT	123	return -EINVAL;
1da177e4 LT	124
53b2bf3f	125	if (tb[TCA_IPT_INDEX] != NULL)
1587bac4	126	index = nla_get_u32(tb[TCA_IPT_INDEX]);
1da177e4	127
86062033 WC	128	if (!tcf_hash_check(index, a, bind) ) {
	129	ret = tcf_hash_create(index, est, a, sizeof(*ipt), bind);
	130	if (ret)
	131	return ret;
1da177e4 LT	132	ret = ACT_P_CREATED;
1da177e4 LT	133	} else {
1a29321e JHS	134	if (bind)/* dont override defaults */
1a29321e JHS	135	return 0;
86062033	136	tcf_ipt_release(a, bind);
1a29321e JHS	137
1a29321e JHS	138	if (!ovr)
1da177e4	139	return -EEXIST;
1da177e4	140	}
86062033	141	ipt = to_ipt(a);
1da177e4	142
1587bac4	143	hook = nla_get_u32(tb[TCA_IPT_HOOK]);
1da177e4 LT	144
	145	err = -ENOMEM;
	146	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
e9ce1cd3	147	if (unlikely(!tname))
1da177e4	148	goto err1;
7ba699c6 PM	149	if (tb[TCA_IPT_TABLE] == NULL \|\|
7ba699c6 PM	150	nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
1da177e4 LT	151	strcpy(tname, "mangle");
1da177e4 LT	152
c7b1b249	153	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
e9ce1cd3	154	if (unlikely(!t))
1da177e4	155	goto err2;
1da177e4	156
cc7ec456 ED	157	err = ipt_init_target(t, tname, hook);
cc7ec456 ED	158	if (err < 0)
1da177e4 LT	159	goto err3;
1da177e4 LT	160
e9ce1cd3	161	spin_lock_bh(&ipt->tcf_lock);
1da177e4	162	if (ret != ACT_P_CREATED) {
e9ce1cd3 DM	163	ipt_destroy_target(ipt->tcfi_t);
	164	kfree(ipt->tcfi_tname);
	165	kfree(ipt->tcfi_t);
1da177e4	166	}
e9ce1cd3 DM	167	ipt->tcfi_tname = tname;
	168	ipt->tcfi_t = t;
	169	ipt->tcfi_hook = hook;
	170	spin_unlock_bh(&ipt->tcf_lock);
1da177e4	171	if (ret == ACT_P_CREATED)
86062033	172	tcf_hash_insert(a);
1da177e4 LT	173	return ret;
	174
	175	err3:
	176	kfree(t);
	177	err2:
	178	kfree(tname);
	179	err1:
86062033 WC	180	if (ret == ACT_P_CREATED)
86062033 WC	181	tcf_hash_cleanup(a, est);
1da177e4 LT	182	return err;
	183	}
	184
dc7f9f6e	185	static int tcf_ipt(struct sk_buff skb, const struct tc_action a,
e9ce1cd3	186	struct tcf_result *res)
1da177e4 LT	187	{
1da177e4 LT	188	int ret = 0, result = 0;
e9ce1cd3	189	struct tcf_ipt *ipt = a->priv;
4b560b44	190	struct xt_action_param par;
1da177e4	191
14bbd6a5 PS	192	if (skb_unclone(skb, GFP_ATOMIC))
14bbd6a5 PS	193	return TC_ACT_UNSPEC;
1da177e4	194
e9ce1cd3	195	spin_lock(&ipt->tcf_lock);
1da177e4	196
e9ce1cd3	197	ipt->tcf_tm.lastuse = jiffies;
bfe0d029	198	bstats_update(&ipt->tcf_bstats, skb);
1da177e4 LT	199
1da177e4 LT	200	/* yes, we have to worry about both in and out dev
cc7ec456 ED	201	* worry later - danger - this API seems to have changed
	202	* from earlier kernels
	203	*/
7eb35586 JE	204	par.in = skb->dev;
	205	par.out = NULL;
	206	par.hooknum = ipt->tcfi_hook;
	207	par.target = ipt->tcfi_t->u.kernel.target;
	208	par.targinfo = ipt->tcfi_t->data;
	209	ret = par.target->target(skb, &par);
	210
1da177e4 LT	211	switch (ret) {
	212	case NF_ACCEPT:
	213	result = TC_ACT_OK;
	214	break;
	215	case NF_DROP:
	216	result = TC_ACT_SHOT;
e9ce1cd3	217	ipt->tcf_qstats.drops++;
1da177e4	218	break;
243bf6e2	219	case XT_CONTINUE:
1da177e4 LT	220	result = TC_ACT_PIPE;
	221	break;
	222	default:
e87cc472 JP	223	net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
e87cc472 JP	224	ret);
1da177e4 LT	225	result = TC_POLICE_OK;
	226	break;
	227	}
e9ce1cd3	228	spin_unlock(&ipt->tcf_lock);
1da177e4 LT	229	return result;
	230
	231	}
	232
e9ce1cd3	233	static int tcf_ipt_dump(struct sk_buff skb, struct tc_action a, int bind, int ref)
1da177e4	234	{
27a884dc	235	unsigned char *b = skb_tail_pointer(skb);
e9ce1cd3	236	struct tcf_ipt *ipt = a->priv;
87a2e70d	237	struct xt_entry_target *t;
1da177e4 LT	238	struct tcf_t tm;
1da177e4 LT	239	struct tc_cnt c;
1da177e4 LT	240
1da177e4 LT	241	/* for simple targets kernel size == user size
cc7ec456 ED	242	* user name = target name
	243	* for foolproof you need to not assume this
	244	*/
1da177e4	245
c7b1b249	246	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
e9ce1cd3	247	if (unlikely(!t))
7ba699c6	248	goto nla_put_failure;
1da177e4	249
e9ce1cd3 DM	250	c.bindcnt = ipt->tcf_bindcnt - bind;
e9ce1cd3 DM	251	c.refcnt = ipt->tcf_refcnt - ref;
e9ce1cd3 DM	252	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
e9ce1cd3 DM	253
1b34ec43 DM	254	if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) \|\|
	255	nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) \|\|
	256	nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) \|\|
	257	nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) \|\|
	258	nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
	259	goto nla_put_failure;
e9ce1cd3 DM	260	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	261	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	262	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
1b34ec43 DM	263	if (nla_put(skb, TCA_IPT_TM, sizeof (tm), &tm))
1b34ec43 DM	264	goto nla_put_failure;
1da177e4 LT	265	kfree(t);
	266	return skb->len;
	267
7ba699c6	268	nla_put_failure:
dc5fc579	269	nlmsg_trim(skb, b);
1da177e4 LT	270	kfree(t);
	271	return -1;
	272	}
	273
	274	static struct tc_action_ops act_ipt_ops = {
	275	.kind = "ipt",
e9ce1cd3	276	.hinfo = &ipt_hash_info,
1da177e4	277	.type = TCA_ACT_IPT,
1da177e4 LT	278	.owner = THIS_MODULE,
	279	.act = tcf_ipt,
	280	.dump = tcf_ipt_dump,
86062033	281	.cleanup = tcf_ipt_release,
1da177e4	282	.init = tcf_ipt_init,
1da177e4 LT	283	};
1da177e4 LT	284
0dcffd09 JHS	285	static struct tc_action_ops act_xt_ops = {
	286	.kind = "xt",
	287	.hinfo = &ipt_hash_info,
6c80563c	288	.type = TCA_ACT_XT,
0dcffd09 JHS	289	.owner = THIS_MODULE,
	290	.act = tcf_ipt,
	291	.dump = tcf_ipt_dump,
86062033	292	.cleanup = tcf_ipt_release,
0dcffd09	293	.init = tcf_ipt_init,
0dcffd09 JHS	294	};
	295
	296	MODULE_AUTHOR("Jamal Hadi Salim(2002-13)");
1da177e4 LT	297	MODULE_DESCRIPTION("Iptables target actions");
1da177e4 LT	298	MODULE_LICENSE("GPL");
0dcffd09	299	MODULE_ALIAS("act_xt");
1da177e4	300
e9ce1cd3	301	static int __init ipt_init_module(void)
1da177e4	302	{
369ba567	303	int ret1, ret2, err;
568a153a	304	err = tcf_hashinfo_init(&ipt_hash_info, IPT_TAB_MASK);
369ba567 WC	305	if (err)
	306	return err;
	307
0dcffd09 JHS	308	ret1 = tcf_register_action(&act_xt_ops);
	309	if (ret1 < 0)
	310	printk("Failed to load xt action\n");
	311	ret2 = tcf_register_action(&act_ipt_ops);
	312	if (ret2 < 0)
	313	printk("Failed to load ipt action\n");
	314
369ba567 WC	315	if (ret1 < 0 && ret2 < 0) {
369ba567 WC	316	tcf_hashinfo_destroy(&ipt_hash_info);
0dcffd09	317	return ret1;
369ba567	318	} else
0dcffd09	319	return 0;
1da177e4 LT	320	}
1da177e4 LT	321
e9ce1cd3	322	static void __exit ipt_cleanup_module(void)
1da177e4	323	{
0dcffd09	324	tcf_unregister_action(&act_xt_ops);
1da177e4	325	tcf_unregister_action(&act_ipt_ops);
369ba567	326	tcf_hashinfo_destroy(&ipt_hash_info);
1da177e4 LT	327	}
	328
	329	module_init(ipt_init_module);
	330	module_exit(ipt_cleanup_module);