[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;
	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 ipt_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 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 (IS_ERR(pc))
		    return PTR_ERR(pc);
		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;
916a917d	58	par.family = NFPROTO_IPV4;
1da177e4	59
916a917d	60	ret = xt_check_target(&par, 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	69	{
a2df1648 JE	70	struct xt_tgdtor_param par = {
	71	.target = t->u.kernel.target,
	72	.targinfo = t->data,
	73	};
	74	if (par.target->destroy != NULL)
	75	par.target->destroy(&par);
	76	module_put(par.target->me);
1da177e4 LT	77	}
1da177e4 LT	78
e9ce1cd3	79	static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
1da177e4 LT	80	{
1da177e4 LT	81	int ret = 0;
e9ce1cd3	82	if (ipt) {
1da177e4	83	if (bind)
e9ce1cd3 DM	84	ipt->tcf_bindcnt--;
	85	ipt->tcf_refcnt--;
	86	if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
	87	ipt_destroy_target(ipt->tcfi_t);
	88	kfree(ipt->tcfi_tname);
	89	kfree(ipt->tcfi_t);
	90	tcf_hash_destroy(&ipt->common, &ipt_hash_info);
1da177e4 LT	91	ret = ACT_P_DELETED;
	92	}
	93	}
	94	return ret;
	95	}
	96
53b2bf3f PM	97	static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
	98	[TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
	99	[TCA_IPT_HOOK] = { .type = NLA_U32 },
	100	[TCA_IPT_INDEX] = { .type = NLA_U32 },
	101	[TCA_IPT_TARG] = { .len = sizeof(struct ipt_entry_target) },
	102	};
	103
7ba699c6	104	static int tcf_ipt_init(struct nlattr nla, struct nlattr est,
e9ce1cd3	105	struct tc_action *a, int ovr, int bind)
1da177e4	106	{
7ba699c6	107	struct nlattr *tb[TCA_IPT_MAX + 1];
e9ce1cd3 DM	108	struct tcf_ipt *ipt;
e9ce1cd3 DM	109	struct tcf_common *pc;
1da177e4 LT	110	struct ipt_entry_target td, t;
	111	char *tname;
	112	int ret = 0, err;
	113	u32 hook = 0;
	114	u32 index = 0;
	115
cee63723	116	if (nla == NULL)
1da177e4 LT	117	return -EINVAL;
1da177e4 LT	118
53b2bf3f	119	err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
cee63723 PM	120	if (err < 0)
	121	return err;
	122
53b2bf3f	123	if (tb[TCA_IPT_HOOK] == NULL)
1da177e4	124	return -EINVAL;
53b2bf3f	125	if (tb[TCA_IPT_TARG] == NULL)
1da177e4	126	return -EINVAL;
53b2bf3f	127
7ba699c6 PM	128	td = (struct ipt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
7ba699c6 PM	129	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
1da177e4 LT	130	return -EINVAL;
1da177e4 LT	131
53b2bf3f	132	if (tb[TCA_IPT_INDEX] != NULL)
1587bac4	133	index = nla_get_u32(tb[TCA_IPT_INDEX]);
1da177e4	134
e9ce1cd3 DM	135	pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
	136	if (!pc) {
	137	pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
	138	&ipt_idx_gen, &ipt_hash_info);
0e991ec6 SH	139	if (IS_ERR(pc))
0e991ec6 SH	140	return PTR_ERR(pc);
1da177e4 LT	141	ret = ACT_P_CREATED;
	142	} else {
	143	if (!ovr) {
e9ce1cd3	144	tcf_ipt_release(to_ipt(pc), bind);
1da177e4 LT	145	return -EEXIST;
	146	}
	147	}
e9ce1cd3	148	ipt = to_ipt(pc);
1da177e4	149
1587bac4	150	hook = nla_get_u32(tb[TCA_IPT_HOOK]);
1da177e4 LT	151
	152	err = -ENOMEM;
	153	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
e9ce1cd3	154	if (unlikely(!tname))
1da177e4	155	goto err1;
7ba699c6 PM	156	if (tb[TCA_IPT_TABLE] == NULL \|\|
7ba699c6 PM	157	nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
1da177e4 LT	158	strcpy(tname, "mangle");
1da177e4 LT	159
c7b1b249	160	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
e9ce1cd3	161	if (unlikely(!t))
1da177e4	162	goto err2;
1da177e4 LT	163
	164	if ((err = ipt_init_target(t, tname, hook)) < 0)
	165	goto err3;
	166
e9ce1cd3	167	spin_lock_bh(&ipt->tcf_lock);
1da177e4	168	if (ret != ACT_P_CREATED) {
e9ce1cd3 DM	169	ipt_destroy_target(ipt->tcfi_t);
	170	kfree(ipt->tcfi_tname);
	171	kfree(ipt->tcfi_t);
1da177e4	172	}
e9ce1cd3 DM	173	ipt->tcfi_tname = tname;
	174	ipt->tcfi_t = t;
	175	ipt->tcfi_hook = hook;
	176	spin_unlock_bh(&ipt->tcf_lock);
1da177e4	177	if (ret == ACT_P_CREATED)
e9ce1cd3	178	tcf_hash_insert(pc, &ipt_hash_info);
1da177e4 LT	179	return ret;
	180
	181	err3:
	182	kfree(t);
	183	err2:
	184	kfree(tname);
	185	err1:
e9ce1cd3	186	kfree(pc);
1da177e4 LT	187	return err;
	188	}
	189
e9ce1cd3	190	static int tcf_ipt_cleanup(struct tc_action *a, int bind)
1da177e4	191	{
e9ce1cd3 DM	192	struct tcf_ipt *ipt = a->priv;
e9ce1cd3 DM	193	return tcf_ipt_release(ipt, bind);
1da177e4 LT	194	}
1da177e4 LT	195
e9ce1cd3 DM	196	static int tcf_ipt(struct sk_buff skb, struct tc_action a,
e9ce1cd3 DM	197	struct tcf_result *res)
1da177e4 LT	198	{
1da177e4 LT	199	int ret = 0, result = 0;
e9ce1cd3	200	struct tcf_ipt *ipt = a->priv;
7eb35586	201	struct xt_target_param par;
1da177e4 LT	202
	203	if (skb_cloned(skb)) {
	204	if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
	205	return TC_ACT_UNSPEC;
	206	}
	207
e9ce1cd3	208	spin_lock(&ipt->tcf_lock);
1da177e4	209
e9ce1cd3	210	ipt->tcf_tm.lastuse = jiffies;
0abf77e5	211	ipt->tcf_bstats.bytes += qdisc_pkt_len(skb);
e9ce1cd3	212	ipt->tcf_bstats.packets++;
1da177e4 LT	213
	214	/* yes, we have to worry about both in and out dev
	215	worry later - danger - this API seems to have changed
	216	from earlier kernels */
7eb35586 JE	217	par.in = skb->dev;
	218	par.out = NULL;
	219	par.hooknum = ipt->tcfi_hook;
	220	par.target = ipt->tcfi_t->u.kernel.target;
	221	par.targinfo = ipt->tcfi_t->data;
	222	ret = par.target->target(skb, &par);
	223
1da177e4 LT	224	switch (ret) {
	225	case NF_ACCEPT:
	226	result = TC_ACT_OK;
	227	break;
	228	case NF_DROP:
	229	result = TC_ACT_SHOT;
e9ce1cd3	230	ipt->tcf_qstats.drops++;
1da177e4 LT	231	break;
	232	case IPT_CONTINUE:
	233	result = TC_ACT_PIPE;
	234	break;
	235	default:
	236	if (net_ratelimit())
	237	printk("Bogus netfilter code %d assume ACCEPT\n", ret);
	238	result = TC_POLICE_OK;
	239	break;
	240	}
e9ce1cd3	241	spin_unlock(&ipt->tcf_lock);
1da177e4 LT	242	return result;
	243
	244	}
	245
e9ce1cd3	246	static int tcf_ipt_dump(struct sk_buff skb, struct tc_action a, int bind, int ref)
1da177e4	247	{
27a884dc	248	unsigned char *b = skb_tail_pointer(skb);
e9ce1cd3	249	struct tcf_ipt *ipt = a->priv;
1da177e4 LT	250	struct ipt_entry_target *t;
	251	struct tcf_t tm;
	252	struct tc_cnt c;
1da177e4 LT	253
	254	/* for simple targets kernel size == user size
	255	** user name = target name
	256	** for foolproof you need to not assume this
	257	*/
	258
c7b1b249	259	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
e9ce1cd3	260	if (unlikely(!t))
7ba699c6	261	goto nla_put_failure;
1da177e4	262
e9ce1cd3 DM	263	c.bindcnt = ipt->tcf_bindcnt - bind;
e9ce1cd3 DM	264	c.refcnt = ipt->tcf_refcnt - ref;
e9ce1cd3 DM	265	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
e9ce1cd3 DM	266
7ba699c6	267	NLA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
24beeab5 PM	268	NLA_PUT_U32(skb, TCA_IPT_INDEX, ipt->tcf_index);
24beeab5 PM	269	NLA_PUT_U32(skb, TCA_IPT_HOOK, ipt->tcfi_hook);
7ba699c6	270	NLA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
57e1c487	271	NLA_PUT_STRING(skb, TCA_IPT_TABLE, ipt->tcfi_tname);
e9ce1cd3 DM	272	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	273	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	274	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
7ba699c6	275	NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
1da177e4 LT	276	kfree(t);
	277	return skb->len;
	278
7ba699c6	279	nla_put_failure:
dc5fc579	280	nlmsg_trim(skb, b);
1da177e4 LT	281	kfree(t);
	282	return -1;
	283	}
	284
	285	static struct tc_action_ops act_ipt_ops = {
	286	.kind = "ipt",
e9ce1cd3	287	.hinfo = &ipt_hash_info,
1da177e4 LT	288	.type = TCA_ACT_IPT,
	289	.capab = TCA_CAP_NONE,
	290	.owner = THIS_MODULE,
	291	.act = tcf_ipt,
	292	.dump = tcf_ipt_dump,
	293	.cleanup = tcf_ipt_cleanup,
	294	.lookup = tcf_hash_search,
	295	.init = tcf_ipt_init,
	296	.walk = tcf_generic_walker
	297	};
	298
	299	MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
	300	MODULE_DESCRIPTION("Iptables target actions");
	301	MODULE_LICENSE("GPL");
	302
e9ce1cd3	303	static int __init ipt_init_module(void)
1da177e4 LT	304	{
	305	return tcf_register_action(&act_ipt_ops);
	306	}
	307
e9ce1cd3	308	static void __exit ipt_cleanup_module(void)
1da177e4 LT	309	{
	310	tcf_unregister_action(&act_ipt_ops);
	311	}
	312
	313	module_init(ipt_init_module);
	314	module_exit(ipt_cleanup_module);