[linux-2.6-block.git] / net / sched / act_ipt.c

/*
 * net/sched/act_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 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 void tcf_ipt_release(struct tc_action *a, int bind)
{
	struct tcf_ipt *ipt = to_ipt(a);
	ipt_destroy_target(ipt->tcfi_t);
	kfree(ipt->tcfi_tname);
	kfree(ipt->tcfi_t);
}

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, false);
		if (ret)
			return ret;
		ret = ACT_P_CREATED;
	} else {
		if (bind)/* dont override defaults */
			return 0;
		tcf_hash_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.net	     = dev_net(skb->dev);
	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",
	.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",
	.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;

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

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

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

module_init(ipt_init_module);
module_exit(ipt_cleanup_module);
Commit	Line	Data
1da177e4	1	/*
0c6965dd	2	* net/sched/act_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
1da177e4	32
87a2e70d	33	static int ipt_init_target(struct xt_entry_target t, char table, unsigned int hook)
1da177e4	34	{
af5d6dc2	35	struct xt_tgchk_param par;
e60a13e0	36	struct xt_target *target;
1da177e4 LT	37	int ret = 0;
1da177e4 LT	38
239a87c8 PM	39	target = xt_request_find_target(AF_INET, t->u.user.name,
239a87c8 PM	40	t->u.user.revision);
d2a7b6ba JE	41	if (IS_ERR(target))
d2a7b6ba JE	42	return PTR_ERR(target);
1da177e4	43
1da177e4	44	t->u.kernel.target = target;
af5d6dc2 JE	45	par.table = table;
	46	par.entryinfo = NULL;
	47	par.target = target;
	48	par.targinfo = t->data;
	49	par.hook_mask = hook;
916a917d	50	par.family = NFPROTO_IPV4;
1da177e4	51
916a917d	52	ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
367c6790	53	if (ret < 0) {
239a87c8	54	module_put(t->u.kernel.target->me);
18118cdb	55	return ret;
239a87c8	56	}
367c6790	57	return 0;
1da177e4 LT	58	}
1da177e4 LT	59
87a2e70d	60	static void ipt_destroy_target(struct xt_entry_target *t)
1da177e4	61	{
a2df1648 JE	62	struct xt_tgdtor_param par = {
	63	.target = t->u.kernel.target,
	64	.targinfo = t->data,
	65	};
	66	if (par.target->destroy != NULL)
	67	par.target->destroy(&par);
	68	module_put(par.target->me);
1da177e4 LT	69	}
1da177e4 LT	70
a5b5c958	71	static void tcf_ipt_release(struct tc_action *a, int bind)
1da177e4	72	{
86062033	73	struct tcf_ipt *ipt = to_ipt(a);
a5b5c958 WC	74	ipt_destroy_target(ipt->tcfi_t);
	75	kfree(ipt->tcfi_tname);
	76	kfree(ipt->tcfi_t);
1da177e4 LT	77	}
1da177e4 LT	78
53b2bf3f PM	79	static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
	80	[TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
	81	[TCA_IPT_HOOK] = { .type = NLA_U32 },
	82	[TCA_IPT_INDEX] = { .type = NLA_U32 },
87a2e70d	83	[TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
53b2bf3f PM	84	};
53b2bf3f PM	85
c1b52739	86	static int tcf_ipt_init(struct net net, struct nlattr nla, struct nlattr *est,
e9ce1cd3	87	struct tc_action *a, int ovr, int bind)
1da177e4	88	{
7ba699c6	89	struct nlattr *tb[TCA_IPT_MAX + 1];
e9ce1cd3	90	struct tcf_ipt *ipt;
87a2e70d	91	struct xt_entry_target td, t;
1da177e4 LT	92	char *tname;
	93	int ret = 0, err;
	94	u32 hook = 0;
	95	u32 index = 0;
	96
cee63723	97	if (nla == NULL)
1da177e4 LT	98	return -EINVAL;
1da177e4 LT	99
53b2bf3f	100	err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
cee63723 PM	101	if (err < 0)
	102	return err;
	103
53b2bf3f	104	if (tb[TCA_IPT_HOOK] == NULL)
1da177e4	105	return -EINVAL;
53b2bf3f	106	if (tb[TCA_IPT_TARG] == NULL)
1da177e4	107	return -EINVAL;
53b2bf3f	108
87a2e70d	109	td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
7ba699c6	110	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
1da177e4 LT	111	return -EINVAL;
1da177e4 LT	112
53b2bf3f	113	if (tb[TCA_IPT_INDEX] != NULL)
1587bac4	114	index = nla_get_u32(tb[TCA_IPT_INDEX]);
1da177e4	115
86062033	116	if (!tcf_hash_check(index, a, bind) ) {
519c818e	117	ret = tcf_hash_create(index, est, a, sizeof(*ipt), bind, false);
86062033 WC	118	if (ret)
86062033 WC	119	return ret;
1da177e4 LT	120	ret = ACT_P_CREATED;
1da177e4 LT	121	} else {
1a29321e JHS	122	if (bind)/* dont override defaults */
1a29321e JHS	123	return 0;
a5b5c958	124	tcf_hash_release(a, bind);
1a29321e JHS	125
1a29321e JHS	126	if (!ovr)
1da177e4	127	return -EEXIST;
1da177e4	128	}
86062033	129	ipt = to_ipt(a);
1da177e4	130
1587bac4	131	hook = nla_get_u32(tb[TCA_IPT_HOOK]);
1da177e4 LT	132
	133	err = -ENOMEM;
	134	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
e9ce1cd3	135	if (unlikely(!tname))
1da177e4	136	goto err1;
7ba699c6 PM	137	if (tb[TCA_IPT_TABLE] == NULL \|\|
7ba699c6 PM	138	nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
1da177e4 LT	139	strcpy(tname, "mangle");
1da177e4 LT	140
c7b1b249	141	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
e9ce1cd3	142	if (unlikely(!t))
1da177e4	143	goto err2;
1da177e4	144
cc7ec456 ED	145	err = ipt_init_target(t, tname, hook);
cc7ec456 ED	146	if (err < 0)
1da177e4 LT	147	goto err3;
1da177e4 LT	148
e9ce1cd3	149	spin_lock_bh(&ipt->tcf_lock);
1da177e4	150	if (ret != ACT_P_CREATED) {
e9ce1cd3 DM	151	ipt_destroy_target(ipt->tcfi_t);
	152	kfree(ipt->tcfi_tname);
	153	kfree(ipt->tcfi_t);
1da177e4	154	}
e9ce1cd3 DM	155	ipt->tcfi_tname = tname;
	156	ipt->tcfi_t = t;
	157	ipt->tcfi_hook = hook;
	158	spin_unlock_bh(&ipt->tcf_lock);
1da177e4	159	if (ret == ACT_P_CREATED)
86062033	160	tcf_hash_insert(a);
1da177e4 LT	161	return ret;
	162
	163	err3:
	164	kfree(t);
	165	err2:
	166	kfree(tname);
	167	err1:
86062033 WC	168	if (ret == ACT_P_CREATED)
86062033 WC	169	tcf_hash_cleanup(a, est);
1da177e4 LT	170	return err;
	171	}
	172
dc7f9f6e	173	static int tcf_ipt(struct sk_buff skb, const struct tc_action a,
e9ce1cd3	174	struct tcf_result *res)
1da177e4 LT	175	{
1da177e4 LT	176	int ret = 0, result = 0;
e9ce1cd3	177	struct tcf_ipt *ipt = a->priv;
4b560b44	178	struct xt_action_param par;
1da177e4	179
14bbd6a5 PS	180	if (skb_unclone(skb, GFP_ATOMIC))
14bbd6a5 PS	181	return TC_ACT_UNSPEC;
1da177e4	182
e9ce1cd3	183	spin_lock(&ipt->tcf_lock);
1da177e4	184
e9ce1cd3	185	ipt->tcf_tm.lastuse = jiffies;
bfe0d029	186	bstats_update(&ipt->tcf_bstats, skb);
1da177e4 LT	187
1da177e4 LT	188	/* yes, we have to worry about both in and out dev
cc7ec456 ED	189	* worry later - danger - this API seems to have changed
	190	* from earlier kernels
	191	*/
156c196f	192	par.net = dev_net(skb->dev);
7eb35586 JE	193	par.in = skb->dev;
	194	par.out = NULL;
	195	par.hooknum = ipt->tcfi_hook;
	196	par.target = ipt->tcfi_t->u.kernel.target;
	197	par.targinfo = ipt->tcfi_t->data;
	198	ret = par.target->target(skb, &par);
	199
1da177e4 LT	200	switch (ret) {
	201	case NF_ACCEPT:
	202	result = TC_ACT_OK;
	203	break;
	204	case NF_DROP:
	205	result = TC_ACT_SHOT;
e9ce1cd3	206	ipt->tcf_qstats.drops++;
1da177e4	207	break;
243bf6e2	208	case XT_CONTINUE:
1da177e4 LT	209	result = TC_ACT_PIPE;
	210	break;
	211	default:
e87cc472 JP	212	net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
e87cc472 JP	213	ret);
1da177e4 LT	214	result = TC_POLICE_OK;
	215	break;
	216	}
e9ce1cd3	217	spin_unlock(&ipt->tcf_lock);
1da177e4 LT	218	return result;
	219
	220	}
	221
e9ce1cd3	222	static int tcf_ipt_dump(struct sk_buff skb, struct tc_action a, int bind, int ref)
1da177e4	223	{
27a884dc	224	unsigned char *b = skb_tail_pointer(skb);
e9ce1cd3	225	struct tcf_ipt *ipt = a->priv;
87a2e70d	226	struct xt_entry_target *t;
1da177e4 LT	227	struct tcf_t tm;
1da177e4 LT	228	struct tc_cnt c;
1da177e4 LT	229
1da177e4 LT	230	/* for simple targets kernel size == user size
cc7ec456 ED	231	* user name = target name
	232	* for foolproof you need to not assume this
	233	*/
1da177e4	234
c7b1b249	235	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
e9ce1cd3	236	if (unlikely(!t))
7ba699c6	237	goto nla_put_failure;
1da177e4	238
e9ce1cd3 DM	239	c.bindcnt = ipt->tcf_bindcnt - bind;
e9ce1cd3 DM	240	c.refcnt = ipt->tcf_refcnt - ref;
e9ce1cd3 DM	241	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
e9ce1cd3 DM	242
1b34ec43 DM	243	if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) \|\|
	244	nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) \|\|
	245	nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) \|\|
	246	nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) \|\|
	247	nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
	248	goto nla_put_failure;
e9ce1cd3 DM	249	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	250	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	251	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
1b34ec43 DM	252	if (nla_put(skb, TCA_IPT_TM, sizeof (tm), &tm))
1b34ec43 DM	253	goto nla_put_failure;
1da177e4 LT	254	kfree(t);
	255	return skb->len;
	256
7ba699c6	257	nla_put_failure:
dc5fc579	258	nlmsg_trim(skb, b);
1da177e4 LT	259	kfree(t);
	260	return -1;
	261	}
	262
	263	static struct tc_action_ops act_ipt_ops = {
	264	.kind = "ipt",
	265	.type = TCA_ACT_IPT,
1da177e4 LT	266	.owner = THIS_MODULE,
	267	.act = tcf_ipt,
	268	.dump = tcf_ipt_dump,
86062033	269	.cleanup = tcf_ipt_release,
1da177e4	270	.init = tcf_ipt_init,
1da177e4 LT	271	};
1da177e4 LT	272
0dcffd09 JHS	273	static struct tc_action_ops act_xt_ops = {
0dcffd09 JHS	274	.kind = "xt",
6c80563c	275	.type = TCA_ACT_XT,
0dcffd09 JHS	276	.owner = THIS_MODULE,
	277	.act = tcf_ipt,
	278	.dump = tcf_ipt_dump,
86062033	279	.cleanup = tcf_ipt_release,
0dcffd09	280	.init = tcf_ipt_init,
0dcffd09 JHS	281	};
	282
	283	MODULE_AUTHOR("Jamal Hadi Salim(2002-13)");
1da177e4 LT	284	MODULE_DESCRIPTION("Iptables target actions");
1da177e4 LT	285	MODULE_LICENSE("GPL");
0dcffd09	286	MODULE_ALIAS("act_xt");
1da177e4	287
e9ce1cd3	288	static int __init ipt_init_module(void)
1da177e4	289	{
4f1e9d89	290	int ret1, ret2;
369ba567	291
4f1e9d89	292	ret1 = tcf_register_action(&act_xt_ops, IPT_TAB_MASK);
0dcffd09 JHS	293	if (ret1 < 0)
0dcffd09 JHS	294	printk("Failed to load xt action\n");
4f1e9d89	295	ret2 = tcf_register_action(&act_ipt_ops, IPT_TAB_MASK);
0dcffd09 JHS	296	if (ret2 < 0)
	297	printk("Failed to load ipt action\n");
	298
369ba567	299	if (ret1 < 0 && ret2 < 0) {
0dcffd09	300	return ret1;
369ba567	301	} else
0dcffd09	302	return 0;
1da177e4 LT	303	}
1da177e4 LT	304
e9ce1cd3	305	static void __exit ipt_cleanup_module(void)
1da177e4	306	{
0dcffd09	307	tcf_unregister_action(&act_xt_ops);
1da177e4 LT	308	tcf_unregister_action(&act_ipt_ops);
	309	}
	310
	311	module_init(ipt_init_module);
	312	module_exit(ipt_cleanup_module);