[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_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 (!target)
		return -ENOENT;

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

	ret = xt_check_target(&par, NFPROTO_IPV4,
	      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 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 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 ipt_entry_target) },
};

static int tcf_ipt_init(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 tcf_common *pc;
	struct ipt_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 ipt_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]);

	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 = 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;

	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;
	struct xt_target_param par;

	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 += qdisc_pkt_len(skb);
	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 */
	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 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 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);

	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);
	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);
	NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
	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,
	.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	{
af5d6dc2	43	struct xt_tgchk_param par;
e60a13e0	44	struct xt_target *target;
1da177e4 LT	45	int ret = 0;
1da177e4 LT	46
239a87c8 PM	47	target = xt_request_find_target(AF_INET, t->u.user.name,
239a87c8 PM	48	t->u.user.revision);
1da177e4 LT	49	if (!target)
	50	return -ENOENT;
	51
1da177e4	52	t->u.kernel.target = target;
af5d6dc2 JE	53	par.table = table;
	54	par.entryinfo = NULL;
	55	par.target = target;
	56	par.targinfo = t->data;
	57	par.hook_mask = hook;
1da177e4	58
af5d6dc2 JE	59	ret = xt_check_target(&par, NFPROTO_IPV4,
af5d6dc2 JE	60	t->u.target_size - sizeof(*t), 0, false);
367c6790	61	if (ret < 0) {
239a87c8	62	module_put(t->u.kernel.target->me);
18118cdb	63	return ret;
239a87c8	64	}
367c6790	65	return 0;
1da177e4 LT	66	}
1da177e4 LT	67
e9ce1cd3	68	static void ipt_destroy_target(struct ipt_entry_target *t)
1da177e4 LT	69	{
1da177e4 LT	70	if (t->u.kernel.target->destroy)
efa74165	71	t->u.kernel.target->destroy(t->u.kernel.target, t->data);
10297b99	72	module_put(t->u.kernel.target->me);
1da177e4 LT	73	}
1da177e4 LT	74
e9ce1cd3	75	static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
1da177e4 LT	76	{
1da177e4 LT	77	int ret = 0;
e9ce1cd3	78	if (ipt) {
1da177e4	79	if (bind)
e9ce1cd3 DM	80	ipt->tcf_bindcnt--;
	81	ipt->tcf_refcnt--;
	82	if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
	83	ipt_destroy_target(ipt->tcfi_t);
	84	kfree(ipt->tcfi_tname);
	85	kfree(ipt->tcfi_t);
	86	tcf_hash_destroy(&ipt->common, &ipt_hash_info);
1da177e4 LT	87	ret = ACT_P_DELETED;
	88	}
	89	}
	90	return ret;
	91	}
	92
53b2bf3f PM	93	static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
	94	[TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
	95	[TCA_IPT_HOOK] = { .type = NLA_U32 },
	96	[TCA_IPT_INDEX] = { .type = NLA_U32 },
	97	[TCA_IPT_TARG] = { .len = sizeof(struct ipt_entry_target) },
	98	};
	99
7ba699c6	100	static int tcf_ipt_init(struct nlattr nla, struct nlattr est,
e9ce1cd3	101	struct tc_action *a, int ovr, int bind)
1da177e4	102	{
7ba699c6	103	struct nlattr *tb[TCA_IPT_MAX + 1];
e9ce1cd3 DM	104	struct tcf_ipt *ipt;
e9ce1cd3 DM	105	struct tcf_common *pc;
1da177e4 LT	106	struct ipt_entry_target td, t;
	107	char *tname;
	108	int ret = 0, err;
	109	u32 hook = 0;
	110	u32 index = 0;
	111
cee63723	112	if (nla == NULL)
1da177e4 LT	113	return -EINVAL;
1da177e4 LT	114
53b2bf3f	115	err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
cee63723 PM	116	if (err < 0)
	117	return err;
	118
53b2bf3f	119	if (tb[TCA_IPT_HOOK] == NULL)
1da177e4	120	return -EINVAL;
53b2bf3f	121	if (tb[TCA_IPT_TARG] == NULL)
1da177e4	122	return -EINVAL;
53b2bf3f	123
7ba699c6 PM	124	td = (struct ipt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
7ba699c6 PM	125	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
1da177e4 LT	126	return -EINVAL;
1da177e4 LT	127
53b2bf3f	128	if (tb[TCA_IPT_INDEX] != NULL)
1587bac4	129	index = nla_get_u32(tb[TCA_IPT_INDEX]);
1da177e4	130
e9ce1cd3 DM	131	pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
	132	if (!pc) {
	133	pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
	134	&ipt_idx_gen, &ipt_hash_info);
	135	if (unlikely(!pc))
1da177e4 LT	136	return -ENOMEM;
	137	ret = ACT_P_CREATED;
	138	} else {
	139	if (!ovr) {
e9ce1cd3	140	tcf_ipt_release(to_ipt(pc), bind);
1da177e4 LT	141	return -EEXIST;
	142	}
	143	}
e9ce1cd3	144	ipt = to_ipt(pc);
1da177e4	145
1587bac4	146	hook = nla_get_u32(tb[TCA_IPT_HOOK]);
1da177e4 LT	147
	148	err = -ENOMEM;
	149	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
e9ce1cd3	150	if (unlikely(!tname))
1da177e4	151	goto err1;
7ba699c6 PM	152	if (tb[TCA_IPT_TABLE] == NULL \|\|
7ba699c6 PM	153	nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
1da177e4 LT	154	strcpy(tname, "mangle");
1da177e4 LT	155
c7b1b249	156	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
e9ce1cd3	157	if (unlikely(!t))
1da177e4	158	goto err2;
1da177e4 LT	159
	160	if ((err = ipt_init_target(t, tname, hook)) < 0)
	161	goto err3;
	162
e9ce1cd3	163	spin_lock_bh(&ipt->tcf_lock);
1da177e4	164	if (ret != ACT_P_CREATED) {
e9ce1cd3 DM	165	ipt_destroy_target(ipt->tcfi_t);
	166	kfree(ipt->tcfi_tname);
	167	kfree(ipt->tcfi_t);
1da177e4	168	}
e9ce1cd3 DM	169	ipt->tcfi_tname = tname;
	170	ipt->tcfi_t = t;
	171	ipt->tcfi_hook = hook;
	172	spin_unlock_bh(&ipt->tcf_lock);
1da177e4	173	if (ret == ACT_P_CREATED)
e9ce1cd3	174	tcf_hash_insert(pc, &ipt_hash_info);
1da177e4 LT	175	return ret;
	176
	177	err3:
	178	kfree(t);
	179	err2:
	180	kfree(tname);
	181	err1:
e9ce1cd3	182	kfree(pc);
1da177e4 LT	183	return err;
	184	}
	185
e9ce1cd3	186	static int tcf_ipt_cleanup(struct tc_action *a, int bind)
1da177e4	187	{
e9ce1cd3 DM	188	struct tcf_ipt *ipt = a->priv;
e9ce1cd3 DM	189	return tcf_ipt_release(ipt, bind);
1da177e4 LT	190	}
1da177e4 LT	191
e9ce1cd3 DM	192	static int tcf_ipt(struct sk_buff skb, struct tc_action a,
e9ce1cd3 DM	193	struct tcf_result *res)
1da177e4 LT	194	{
1da177e4 LT	195	int ret = 0, result = 0;
e9ce1cd3	196	struct tcf_ipt *ipt = a->priv;
7eb35586	197	struct xt_target_param par;
1da177e4 LT	198
	199	if (skb_cloned(skb)) {
	200	if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
	201	return TC_ACT_UNSPEC;
	202	}
	203
e9ce1cd3	204	spin_lock(&ipt->tcf_lock);
1da177e4	205
e9ce1cd3	206	ipt->tcf_tm.lastuse = jiffies;
0abf77e5	207	ipt->tcf_bstats.bytes += qdisc_pkt_len(skb);
e9ce1cd3	208	ipt->tcf_bstats.packets++;
1da177e4 LT	209
	210	/* yes, we have to worry about both in and out dev
	211	worry later - danger - this API seems to have changed
	212	from earlier kernels */
7eb35586 JE	213	par.in = skb->dev;
	214	par.out = NULL;
	215	par.hooknum = ipt->tcfi_hook;
	216	par.target = ipt->tcfi_t->u.kernel.target;
	217	par.targinfo = ipt->tcfi_t->data;
	218	ret = par.target->target(skb, &par);
	219
1da177e4 LT	220	switch (ret) {
	221	case NF_ACCEPT:
	222	result = TC_ACT_OK;
	223	break;
	224	case NF_DROP:
	225	result = TC_ACT_SHOT;
e9ce1cd3	226	ipt->tcf_qstats.drops++;
1da177e4 LT	227	break;
	228	case IPT_CONTINUE:
	229	result = TC_ACT_PIPE;
	230	break;
	231	default:
	232	if (net_ratelimit())
	233	printk("Bogus netfilter code %d assume ACCEPT\n", ret);
	234	result = TC_POLICE_OK;
	235	break;
	236	}
e9ce1cd3	237	spin_unlock(&ipt->tcf_lock);
1da177e4 LT	238	return result;
	239
	240	}
	241
e9ce1cd3	242	static int tcf_ipt_dump(struct sk_buff skb, struct tc_action a, int bind, int ref)
1da177e4	243	{
27a884dc	244	unsigned char *b = skb_tail_pointer(skb);
e9ce1cd3	245	struct tcf_ipt *ipt = a->priv;
1da177e4 LT	246	struct ipt_entry_target *t;
	247	struct tcf_t tm;
	248	struct tc_cnt c;
1da177e4 LT	249
	250	/* for simple targets kernel size == user size
	251	** user name = target name
	252	** for foolproof you need to not assume this
	253	*/
	254
c7b1b249	255	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
e9ce1cd3	256	if (unlikely(!t))
7ba699c6	257	goto nla_put_failure;
1da177e4	258
e9ce1cd3 DM	259	c.bindcnt = ipt->tcf_bindcnt - bind;
e9ce1cd3 DM	260	c.refcnt = ipt->tcf_refcnt - ref;
e9ce1cd3 DM	261	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
e9ce1cd3 DM	262
7ba699c6	263	NLA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
24beeab5 PM	264	NLA_PUT_U32(skb, TCA_IPT_INDEX, ipt->tcf_index);
24beeab5 PM	265	NLA_PUT_U32(skb, TCA_IPT_HOOK, ipt->tcfi_hook);
7ba699c6	266	NLA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
57e1c487	267	NLA_PUT_STRING(skb, TCA_IPT_TABLE, ipt->tcfi_tname);
e9ce1cd3 DM	268	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	269	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	270	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
7ba699c6	271	NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
1da177e4 LT	272	kfree(t);
	273	return skb->len;
	274
7ba699c6	275	nla_put_failure:
dc5fc579	276	nlmsg_trim(skb, b);
1da177e4 LT	277	kfree(t);
	278	return -1;
	279	}
	280
	281	static struct tc_action_ops act_ipt_ops = {
	282	.kind = "ipt",
e9ce1cd3	283	.hinfo = &ipt_hash_info,
1da177e4 LT	284	.type = TCA_ACT_IPT,
	285	.capab = TCA_CAP_NONE,
	286	.owner = THIS_MODULE,
	287	.act = tcf_ipt,
	288	.dump = tcf_ipt_dump,
	289	.cleanup = tcf_ipt_cleanup,
	290	.lookup = tcf_hash_search,
	291	.init = tcf_ipt_init,
	292	.walk = tcf_generic_walker
	293	};
	294
	295	MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
	296	MODULE_DESCRIPTION("Iptables target actions");
	297	MODULE_LICENSE("GPL");
	298
e9ce1cd3	299	static int __init ipt_init_module(void)
1da177e4 LT	300	{
	301	return tcf_register_action(&act_ipt_ops);
	302	}
	303
e9ce1cd3	304	static void __exit ipt_cleanup_module(void)
1da177e4 LT	305	{
	306	tcf_unregister_action(&act_ipt_ops);
	307	}
	308
	309	module_init(ipt_init_module);
	310	module_exit(ipt_cleanup_module);