[linux-2.6-block.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 (2002-4)
 */

#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 <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_common *tcf_ipt_ht[IPT_TAB_MASK + 1];
static u32 ipt_idx_gen;
static DEFINE_RWLOCK(ipt_lock);

static struct tcf_hashinfo ipt_hash_info = {
	.htab	=	tcf_ipt_ht,
	.hmask	=	IPT_TAB_MASK,
	.lock	=	&ipt_lock,
};

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

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

	t->u.kernel.target = target;

	ret = xt_check_target(target, AF_INET, t->u.target_size - sizeof(*t),
			      table, hook, 0, 0);
	if (ret) {
		module_put(t->u.kernel.target->me);
		return ret;
	}
	if (t->u.kernel.target->checkentry
	    && !t->u.kernel.target->checkentry(table, NULL,
					       t->u.kernel.target, t->data,
					       hook)) {
		module_put(t->u.kernel.target->me);
		ret = -EINVAL;
	}

	return ret;
}

static void ipt_destroy_target(struct ipt_entry_target *t)
{
	if (t->u.kernel.target->destroy)
		t->u.kernel.target->destroy(t->u.kernel.target, t->data);
	module_put(t->u.kernel.target->me);
}

static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
{
	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(&ipt->common, &ipt_hash_info);
			ret = ACT_P_DELETED;
		}
	}
	return ret;
}

static int tcf_ipt_init(struct rtattr *rta, struct rtattr *est,
			struct tc_action *a, int ovr, int bind)
{
	struct rtattr *tb[TCA_IPT_MAX];
	struct tcf_ipt *ipt;
	struct tcf_common *pc;
	struct ipt_entry_target *td, *t;
	char *tname;
	int ret = 0, err;
	u32 hook = 0;
	u32 index = 0;

	if (rta == NULL || rtattr_parse_nested(tb, TCA_IPT_MAX, rta) < 0)
		return -EINVAL;

	if (tb[TCA_IPT_HOOK-1] == NULL ||
	    RTA_PAYLOAD(tb[TCA_IPT_HOOK-1]) < sizeof(u32))
		return -EINVAL;
	if (tb[TCA_IPT_TARG-1] == NULL ||
	    RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < sizeof(*t))
		return -EINVAL;
	td = (struct ipt_entry_target *)RTA_DATA(tb[TCA_IPT_TARG-1]);
	if (RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < td->u.target_size)
		return -EINVAL;

	if (tb[TCA_IPT_INDEX-1] != NULL &&
	    RTA_PAYLOAD(tb[TCA_IPT_INDEX-1]) >= sizeof(u32))
		index = *(u32 *)RTA_DATA(tb[TCA_IPT_INDEX-1]);

	pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
	if (!pc) {
		pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
				     &ipt_idx_gen, &ipt_hash_info);
		if (unlikely(!pc))
			return -ENOMEM;
		ret = ACT_P_CREATED;
	} else {
		if (!ovr) {
			tcf_ipt_release(to_ipt(pc), bind);
			return -EEXIST;
		}
	}
	ipt = to_ipt(pc);

	hook = *(u32 *)RTA_DATA(tb[TCA_IPT_HOOK-1]);

	err = -ENOMEM;
	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
	if (unlikely(!tname))
		goto err1;
	if (tb[TCA_IPT_TABLE - 1] == NULL ||
	    rtattr_strlcpy(tname, tb[TCA_IPT_TABLE-1], IFNAMSIZ) >= IFNAMSIZ)
		strcpy(tname, "mangle");

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

	if ((err = ipt_init_target(t, tname, hook)) < 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(pc, &ipt_hash_info);
	return ret;

err3:
	kfree(t);
err2:
	kfree(tname);
err1:
	kfree(pc);
	return err;
}

static int tcf_ipt_cleanup(struct tc_action *a, int bind)
{
	struct tcf_ipt *ipt = a->priv;
	return tcf_ipt_release(ipt, bind);
}

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

	if (skb_cloned(skb)) {
		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
			return TC_ACT_UNSPEC;
	}

	spin_lock(&ipt->tcf_lock);

	ipt->tcf_tm.lastuse = jiffies;
	ipt->tcf_bstats.bytes += skb->len;
	ipt->tcf_bstats.packets++;

	/* yes, we have to worry about both in and out dev
	 worry later - danger - this API seems to have changed
	 from earlier kernels */
	ret = ipt->tcfi_t->u.kernel.target->target(skb, skb->dev, NULL,
						   ipt->tcfi_hook,
						   ipt->tcfi_t->u.kernel.target,
						   ipt->tcfi_t->data);
	switch (ret) {
	case NF_ACCEPT:
		result = TC_ACT_OK;
		break;
	case NF_DROP:
		result = TC_ACT_SHOT;
		ipt->tcf_qstats.drops++;
		break;
	case IPT_CONTINUE:
		result = TC_ACT_PIPE;
		break;
	default:
		if (net_ratelimit())
			printk("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 ipt_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 rtattr_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);

	RTA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
	RTA_PUT(skb, TCA_IPT_INDEX, 4, &ipt->tcf_index);
	RTA_PUT(skb, TCA_IPT_HOOK, 4, &ipt->tcfi_hook);
	RTA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
	RTA_PUT(skb, TCA_IPT_TABLE, IFNAMSIZ, ipt->tcfi_tname);
	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);
	RTA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
	kfree(t);
	return skb->len;

rtattr_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,
	.capab		=	TCA_CAP_NONE,
	.owner		=	THIS_MODULE,
	.act		=	tcf_ipt,
	.dump		=	tcf_ipt_dump,
	.cleanup	=	tcf_ipt_cleanup,
	.lookup		=	tcf_hash_search,
	.init		=	tcf_ipt_init,
	.walk		=	tcf_generic_walker
};

MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
MODULE_DESCRIPTION("Iptables target actions");
MODULE_LICENSE("GPL");

static int __init ipt_init_module(void)
{
	return tcf_register_action(&act_ipt_ops);
}

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

module_init(ipt_init_module);
module_exit(ipt_cleanup_module);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* net/sched/ipt.c iptables target interface
	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	*
	11	* Copyright: Jamal Hadi Salim (2002-4)
	12	*/
	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>
dc5fc579	22	#include <net/netlink.h>
1da177e4 LT	23	#include <net/pkt_sched.h>
	24	#include <linux/tc_act/tc_ipt.h>
	25	#include <net/tc_act/tc_ipt.h>
	26
	27	#include <linux/netfilter_ipv4/ip_tables.h>
	28
1da177e4	29
e9ce1cd3 DM	30	#define IPT_TAB_MASK 15
	31	static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1];
	32	static u32 ipt_idx_gen;
1da177e4 LT	33	static DEFINE_RWLOCK(ipt_lock);
1da177e4 LT	34
e9ce1cd3 DM	35	static struct tcf_hashinfo ipt_hash_info = {
	36	.htab = tcf_ipt_ht,
	37	.hmask = IPT_TAB_MASK,
	38	.lock = &ipt_lock,
	39	};
1da177e4	40
e9ce1cd3	41	static int ipt_init_target(struct ipt_entry_target t, char table, unsigned int hook)
1da177e4	42	{
e60a13e0	43	struct xt_target *target;
1da177e4 LT	44	int ret = 0;
1da177e4 LT	45
239a87c8 PM	46	target = xt_request_find_target(AF_INET, t->u.user.name,
239a87c8 PM	47	t->u.user.revision);
1da177e4 LT	48	if (!target)
	49	return -ENOENT;
	50
1da177e4 LT	51	t->u.kernel.target = target;
1da177e4 LT	52
18118cdb PM	53	ret = xt_check_target(target, AF_INET, t->u.target_size - sizeof(*t),
18118cdb PM	54	table, hook, 0, 0);
239a87c8 PM	55	if (ret) {
239a87c8 PM	56	module_put(t->u.kernel.target->me);
18118cdb	57	return ret;
239a87c8	58	}
1da177e4	59	if (t->u.kernel.target->checkentry
1c524830	60	&& !t->u.kernel.target->checkentry(table, NULL,
10297b99	61	t->u.kernel.target, t->data,
1da177e4	62	hook)) {
1da177e4 LT	63	module_put(t->u.kernel.target->me);
	64	ret = -EINVAL;
	65	}
	66
	67	return ret;
	68	}
	69
e9ce1cd3	70	static void ipt_destroy_target(struct ipt_entry_target *t)
1da177e4 LT	71	{
1da177e4 LT	72	if (t->u.kernel.target->destroy)
efa74165	73	t->u.kernel.target->destroy(t->u.kernel.target, t->data);
10297b99	74	module_put(t->u.kernel.target->me);
1da177e4 LT	75	}
1da177e4 LT	76
e9ce1cd3	77	static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
1da177e4 LT	78	{
1da177e4 LT	79	int ret = 0;
e9ce1cd3	80	if (ipt) {
1da177e4	81	if (bind)
e9ce1cd3 DM	82	ipt->tcf_bindcnt--;
	83	ipt->tcf_refcnt--;
	84	if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
	85	ipt_destroy_target(ipt->tcfi_t);
	86	kfree(ipt->tcfi_tname);
	87	kfree(ipt->tcfi_t);
	88	tcf_hash_destroy(&ipt->common, &ipt_hash_info);
1da177e4 LT	89	ret = ACT_P_DELETED;
	90	}
	91	}
	92	return ret;
	93	}
	94
e9ce1cd3 DM	95	static int tcf_ipt_init(struct rtattr rta, struct rtattr est,
e9ce1cd3 DM	96	struct tc_action *a, int ovr, int bind)
1da177e4 LT	97	{
1da177e4 LT	98	struct rtattr *tb[TCA_IPT_MAX];
e9ce1cd3 DM	99	struct tcf_ipt *ipt;
e9ce1cd3 DM	100	struct tcf_common *pc;
1da177e4 LT	101	struct ipt_entry_target td, t;
	102	char *tname;
	103	int ret = 0, err;
	104	u32 hook = 0;
	105	u32 index = 0;
	106
	107	if (rta == NULL \|\| rtattr_parse_nested(tb, TCA_IPT_MAX, rta) < 0)
	108	return -EINVAL;
	109
	110	if (tb[TCA_IPT_HOOK-1] == NULL \|\|
	111	RTA_PAYLOAD(tb[TCA_IPT_HOOK-1]) < sizeof(u32))
	112	return -EINVAL;
	113	if (tb[TCA_IPT_TARG-1] == NULL \|\|
	114	RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < sizeof(*t))
	115	return -EINVAL;
	116	td = (struct ipt_entry_target *)RTA_DATA(tb[TCA_IPT_TARG-1]);
	117	if (RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < td->u.target_size)
	118	return -EINVAL;
	119
	120	if (tb[TCA_IPT_INDEX-1] != NULL &&
	121	RTA_PAYLOAD(tb[TCA_IPT_INDEX-1]) >= sizeof(u32))
	122	index = (u32 )RTA_DATA(tb[TCA_IPT_INDEX-1]);
	123
e9ce1cd3 DM	124	pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
	125	if (!pc) {
	126	pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
	127	&ipt_idx_gen, &ipt_hash_info);
	128	if (unlikely(!pc))
1da177e4 LT	129	return -ENOMEM;
	130	ret = ACT_P_CREATED;
	131	} else {
	132	if (!ovr) {
e9ce1cd3	133	tcf_ipt_release(to_ipt(pc), bind);
1da177e4 LT	134	return -EEXIST;
	135	}
	136	}
e9ce1cd3	137	ipt = to_ipt(pc);
1da177e4 LT	138
	139	hook = (u32 )RTA_DATA(tb[TCA_IPT_HOOK-1]);
	140
	141	err = -ENOMEM;
	142	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
e9ce1cd3	143	if (unlikely(!tname))
1da177e4 LT	144	goto err1;
	145	if (tb[TCA_IPT_TABLE - 1] == NULL \|\|
	146	rtattr_strlcpy(tname, tb[TCA_IPT_TABLE-1], IFNAMSIZ) >= IFNAMSIZ)
	147	strcpy(tname, "mangle");
	148
c7b1b249	149	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
e9ce1cd3	150	if (unlikely(!t))
1da177e4	151	goto err2;
1da177e4 LT	152
	153	if ((err = ipt_init_target(t, tname, hook)) < 0)
	154	goto err3;
	155
e9ce1cd3	156	spin_lock_bh(&ipt->tcf_lock);
1da177e4	157	if (ret != ACT_P_CREATED) {
e9ce1cd3 DM	158	ipt_destroy_target(ipt->tcfi_t);
	159	kfree(ipt->tcfi_tname);
	160	kfree(ipt->tcfi_t);
1da177e4	161	}
e9ce1cd3 DM	162	ipt->tcfi_tname = tname;
	163	ipt->tcfi_t = t;
	164	ipt->tcfi_hook = hook;
	165	spin_unlock_bh(&ipt->tcf_lock);
1da177e4	166	if (ret == ACT_P_CREATED)
e9ce1cd3	167	tcf_hash_insert(pc, &ipt_hash_info);
1da177e4 LT	168	return ret;
	169
	170	err3:
	171	kfree(t);
	172	err2:
	173	kfree(tname);
	174	err1:
e9ce1cd3	175	kfree(pc);
1da177e4 LT	176	return err;
	177	}
	178
e9ce1cd3	179	static int tcf_ipt_cleanup(struct tc_action *a, int bind)
1da177e4	180	{
e9ce1cd3 DM	181	struct tcf_ipt *ipt = a->priv;
e9ce1cd3 DM	182	return tcf_ipt_release(ipt, bind);
1da177e4 LT	183	}
1da177e4 LT	184
e9ce1cd3 DM	185	static int tcf_ipt(struct sk_buff skb, struct tc_action a,
e9ce1cd3 DM	186	struct tcf_result *res)
1da177e4 LT	187	{
1da177e4 LT	188	int ret = 0, result = 0;
e9ce1cd3	189	struct tcf_ipt *ipt = a->priv;
1da177e4 LT	190
	191	if (skb_cloned(skb)) {
	192	if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
	193	return TC_ACT_UNSPEC;
	194	}
	195
e9ce1cd3	196	spin_lock(&ipt->tcf_lock);
1da177e4	197
e9ce1cd3 DM	198	ipt->tcf_tm.lastuse = jiffies;
	199	ipt->tcf_bstats.bytes += skb->len;
	200	ipt->tcf_bstats.packets++;
1da177e4 LT	201
	202	/* yes, we have to worry about both in and out dev
	203	worry later - danger - this API seems to have changed
	204	from earlier kernels */
3db05fea	205	ret = ipt->tcfi_t->u.kernel.target->target(skb, skb->dev, NULL,
e9ce1cd3 DM	206	ipt->tcfi_hook,
e9ce1cd3 DM	207	ipt->tcfi_t->u.kernel.target,
fe1cb108	208	ipt->tcfi_t->data);
1da177e4 LT	209	switch (ret) {
	210	case NF_ACCEPT:
	211	result = TC_ACT_OK;
	212	break;
	213	case NF_DROP:
	214	result = TC_ACT_SHOT;
e9ce1cd3	215	ipt->tcf_qstats.drops++;
1da177e4 LT	216	break;
	217	case IPT_CONTINUE:
	218	result = TC_ACT_PIPE;
	219	break;
	220	default:
	221	if (net_ratelimit())
	222	printk("Bogus netfilter code %d assume ACCEPT\n", ret);
	223	result = TC_POLICE_OK;
	224	break;
	225	}
e9ce1cd3	226	spin_unlock(&ipt->tcf_lock);
1da177e4 LT	227	return result;
	228
	229	}
	230
e9ce1cd3	231	static int tcf_ipt_dump(struct sk_buff skb, struct tc_action a, int bind, int ref)
1da177e4	232	{
27a884dc	233	unsigned char *b = skb_tail_pointer(skb);
e9ce1cd3	234	struct tcf_ipt *ipt = a->priv;
1da177e4 LT	235	struct ipt_entry_target *t;
	236	struct tcf_t tm;
	237	struct tc_cnt c;
1da177e4 LT	238
	239	/* for simple targets kernel size == user size
	240	** user name = target name
	241	** for foolproof you need to not assume this
	242	*/
	243
c7b1b249	244	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
e9ce1cd3	245	if (unlikely(!t))
1da177e4 LT	246	goto rtattr_failure;
1da177e4 LT	247
e9ce1cd3 DM	248	c.bindcnt = ipt->tcf_bindcnt - bind;
e9ce1cd3 DM	249	c.refcnt = ipt->tcf_refcnt - ref;
e9ce1cd3 DM	250	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
	251
	252	RTA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
	253	RTA_PUT(skb, TCA_IPT_INDEX, 4, &ipt->tcf_index);
	254	RTA_PUT(skb, TCA_IPT_HOOK, 4, &ipt->tcfi_hook);
1da177e4	255	RTA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
e9ce1cd3 DM	256	RTA_PUT(skb, TCA_IPT_TABLE, IFNAMSIZ, ipt->tcfi_tname);
	257	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	258	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	259	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
1da177e4 LT	260	RTA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
	261	kfree(t);
	262	return skb->len;
	263
e9ce1cd3	264	rtattr_failure:
dc5fc579	265	nlmsg_trim(skb, b);
1da177e4 LT	266	kfree(t);
	267	return -1;
	268	}
	269
	270	static struct tc_action_ops act_ipt_ops = {
	271	.kind = "ipt",
e9ce1cd3	272	.hinfo = &ipt_hash_info,
1da177e4 LT	273	.type = TCA_ACT_IPT,
	274	.capab = TCA_CAP_NONE,
	275	.owner = THIS_MODULE,
	276	.act = tcf_ipt,
	277	.dump = tcf_ipt_dump,
	278	.cleanup = tcf_ipt_cleanup,
	279	.lookup = tcf_hash_search,
	280	.init = tcf_ipt_init,
	281	.walk = tcf_generic_walker
	282	};
	283
	284	MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
	285	MODULE_DESCRIPTION("Iptables target actions");
	286	MODULE_LICENSE("GPL");
	287
e9ce1cd3	288	static int __init ipt_init_module(void)
1da177e4 LT	289	{
	290	return tcf_register_action(&act_ipt_ops);
	291	}
	292
e9ce1cd3	293	static void __exit ipt_cleanup_module(void)
1da177e4 LT	294	{
	295	tcf_unregister_action(&act_ipt_ops);
	296	}
	297
	298	module_init(ipt_init_module);
	299	module_exit(ipt_cleanup_module);