[deliverable/linux.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 <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_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 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 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 xt_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 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]);

	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;

	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(pc, &ipt_hash_info);
	return ret;

err3:
	kfree(t);
err2:
	kfree(tname);
err1:
	if (ret == ACT_P_CREATED) {
		if (est)
			gen_kill_estimator(&pc->tcfc_bstats,
					   &pc->tcfc_rate_est);
		kfree_rcu(pc, tcfc_rcu);
	}
	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, 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_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;
	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,
	.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	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	*
	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>
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 DM	31	#define IPT_TAB_MASK 15
	32	static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1];
	33	static u32 ipt_idx_gen;
1da177e4 LT	34	static DEFINE_RWLOCK(ipt_lock);
1da177e4 LT	35
e9ce1cd3 DM	36	static struct tcf_hashinfo ipt_hash_info = {
	37	.htab = tcf_ipt_ht,
	38	.hmask = IPT_TAB_MASK,
	39	.lock = &ipt_lock,
	40	};
1da177e4	41
87a2e70d	42	static int ipt_init_target(struct xt_entry_target t, char table, unsigned int hook)
1da177e4	43	{
af5d6dc2	44	struct xt_tgchk_param par;
e60a13e0	45	struct xt_target *target;
1da177e4 LT	46	int ret = 0;
1da177e4 LT	47
239a87c8 PM	48	target = xt_request_find_target(AF_INET, t->u.user.name,
239a87c8 PM	49	t->u.user.revision);
d2a7b6ba JE	50	if (IS_ERR(target))
d2a7b6ba JE	51	return PTR_ERR(target);
1da177e4	52
1da177e4	53	t->u.kernel.target = target;
af5d6dc2 JE	54	par.table = table;
	55	par.entryinfo = NULL;
	56	par.target = target;
	57	par.targinfo = t->data;
	58	par.hook_mask = hook;
916a917d	59	par.family = NFPROTO_IPV4;
1da177e4	60
916a917d	61	ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
367c6790	62	if (ret < 0) {
239a87c8	63	module_put(t->u.kernel.target->me);
18118cdb	64	return ret;
239a87c8	65	}
367c6790	66	return 0;
1da177e4 LT	67	}
1da177e4 LT	68
87a2e70d	69	static void ipt_destroy_target(struct xt_entry_target *t)
1da177e4	70	{
a2df1648 JE	71	struct xt_tgdtor_param par = {
	72	.target = t->u.kernel.target,
	73	.targinfo = t->data,
	74	};
	75	if (par.target->destroy != NULL)
	76	par.target->destroy(&par);
	77	module_put(par.target->me);
1da177e4 LT	78	}
1da177e4 LT	79
e9ce1cd3	80	static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
1da177e4 LT	81	{
1da177e4 LT	82	int ret = 0;
e9ce1cd3	83	if (ipt) {
1da177e4	84	if (bind)
e9ce1cd3 DM	85	ipt->tcf_bindcnt--;
	86	ipt->tcf_refcnt--;
	87	if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
	88	ipt_destroy_target(ipt->tcfi_t);
	89	kfree(ipt->tcfi_tname);
	90	kfree(ipt->tcfi_t);
	91	tcf_hash_destroy(&ipt->common, &ipt_hash_info);
1da177e4 LT	92	ret = ACT_P_DELETED;
	93	}
	94	}
	95	return ret;
	96	}
	97
53b2bf3f PM	98	static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
	99	[TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
	100	[TCA_IPT_HOOK] = { .type = NLA_U32 },
	101	[TCA_IPT_INDEX] = { .type = NLA_U32 },
87a2e70d	102	[TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
53b2bf3f PM	103	};
53b2bf3f PM	104
7ba699c6	105	static int tcf_ipt_init(struct nlattr nla, struct nlattr est,
e9ce1cd3	106	struct tc_action *a, int ovr, int bind)
1da177e4	107	{
7ba699c6	108	struct nlattr *tb[TCA_IPT_MAX + 1];
e9ce1cd3 DM	109	struct tcf_ipt *ipt;
e9ce1cd3 DM	110	struct tcf_common *pc;
87a2e70d	111	struct xt_entry_target td, t;
1da177e4 LT	112	char *tname;
	113	int ret = 0, err;
	114	u32 hook = 0;
	115	u32 index = 0;
	116
cee63723	117	if (nla == NULL)
1da177e4 LT	118	return -EINVAL;
1da177e4 LT	119
53b2bf3f	120	err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
cee63723 PM	121	if (err < 0)
	122	return err;
	123
53b2bf3f	124	if (tb[TCA_IPT_HOOK] == NULL)
1da177e4	125	return -EINVAL;
53b2bf3f	126	if (tb[TCA_IPT_TARG] == NULL)
1da177e4	127	return -EINVAL;
53b2bf3f	128
87a2e70d	129	td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
7ba699c6	130	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
1da177e4 LT	131	return -EINVAL;
1da177e4 LT	132
53b2bf3f	133	if (tb[TCA_IPT_INDEX] != NULL)
1587bac4	134	index = nla_get_u32(tb[TCA_IPT_INDEX]);
1da177e4	135
e9ce1cd3 DM	136	pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
	137	if (!pc) {
	138	pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
	139	&ipt_idx_gen, &ipt_hash_info);
0e991ec6	140	if (IS_ERR(pc))
cc7ec456	141	return PTR_ERR(pc);
1da177e4 LT	142	ret = ACT_P_CREATED;
	143	} else {
	144	if (!ovr) {
e9ce1cd3	145	tcf_ipt_release(to_ipt(pc), bind);
1da177e4 LT	146	return -EEXIST;
	147	}
	148	}
e9ce1cd3	149	ipt = to_ipt(pc);
1da177e4	150
1587bac4	151	hook = nla_get_u32(tb[TCA_IPT_HOOK]);
1da177e4 LT	152
	153	err = -ENOMEM;
	154	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
e9ce1cd3	155	if (unlikely(!tname))
1da177e4	156	goto err1;
7ba699c6 PM	157	if (tb[TCA_IPT_TABLE] == NULL \|\|
7ba699c6 PM	158	nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
1da177e4 LT	159	strcpy(tname, "mangle");
1da177e4 LT	160
c7b1b249	161	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
e9ce1cd3	162	if (unlikely(!t))
1da177e4	163	goto err2;
1da177e4	164
cc7ec456 ED	165	err = ipt_init_target(t, tname, hook);
cc7ec456 ED	166	if (err < 0)
1da177e4 LT	167	goto err3;
1da177e4 LT	168
e9ce1cd3	169	spin_lock_bh(&ipt->tcf_lock);
1da177e4	170	if (ret != ACT_P_CREATED) {
e9ce1cd3 DM	171	ipt_destroy_target(ipt->tcfi_t);
	172	kfree(ipt->tcfi_tname);
	173	kfree(ipt->tcfi_t);
1da177e4	174	}
e9ce1cd3 DM	175	ipt->tcfi_tname = tname;
	176	ipt->tcfi_t = t;
	177	ipt->tcfi_hook = hook;
	178	spin_unlock_bh(&ipt->tcf_lock);
1da177e4	179	if (ret == ACT_P_CREATED)
e9ce1cd3	180	tcf_hash_insert(pc, &ipt_hash_info);
1da177e4 LT	181	return ret;
	182
	183	err3:
	184	kfree(t);
	185	err2:
	186	kfree(tname);
	187	err1:
47fd92f5 HS	188	if (ret == ACT_P_CREATED) {
	189	if (est)
	190	gen_kill_estimator(&pc->tcfc_bstats,
	191	&pc->tcfc_rate_est);
	192	kfree_rcu(pc, tcfc_rcu);
	193	}
1da177e4 LT	194	return err;
	195	}
	196
e9ce1cd3	197	static int tcf_ipt_cleanup(struct tc_action *a, int bind)
1da177e4	198	{
e9ce1cd3 DM	199	struct tcf_ipt *ipt = a->priv;
e9ce1cd3 DM	200	return tcf_ipt_release(ipt, bind);
1da177e4 LT	201	}
1da177e4 LT	202
dc7f9f6e	203	static int tcf_ipt(struct sk_buff skb, const struct tc_action a,
e9ce1cd3	204	struct tcf_result *res)
1da177e4 LT	205	{
1da177e4 LT	206	int ret = 0, result = 0;
e9ce1cd3	207	struct tcf_ipt *ipt = a->priv;
4b560b44	208	struct xt_action_param par;
1da177e4 LT	209
	210	if (skb_cloned(skb)) {
	211	if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
	212	return TC_ACT_UNSPEC;
	213	}
	214
e9ce1cd3	215	spin_lock(&ipt->tcf_lock);
1da177e4	216
e9ce1cd3	217	ipt->tcf_tm.lastuse = jiffies;
bfe0d029	218	bstats_update(&ipt->tcf_bstats, skb);
1da177e4 LT	219
1da177e4 LT	220	/* yes, we have to worry about both in and out dev
cc7ec456 ED	221	* worry later - danger - this API seems to have changed
	222	* from earlier kernels
	223	*/
7eb35586 JE	224	par.in = skb->dev;
	225	par.out = NULL;
	226	par.hooknum = ipt->tcfi_hook;
	227	par.target = ipt->tcfi_t->u.kernel.target;
	228	par.targinfo = ipt->tcfi_t->data;
	229	ret = par.target->target(skb, &par);
	230
1da177e4 LT	231	switch (ret) {
	232	case NF_ACCEPT:
	233	result = TC_ACT_OK;
	234	break;
	235	case NF_DROP:
	236	result = TC_ACT_SHOT;
e9ce1cd3	237	ipt->tcf_qstats.drops++;
1da177e4	238	break;
243bf6e2	239	case XT_CONTINUE:
1da177e4 LT	240	result = TC_ACT_PIPE;
	241	break;
	242	default:
e87cc472 JP	243	net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
e87cc472 JP	244	ret);
1da177e4 LT	245	result = TC_POLICE_OK;
	246	break;
	247	}
e9ce1cd3	248	spin_unlock(&ipt->tcf_lock);
1da177e4 LT	249	return result;
	250
	251	}
	252
e9ce1cd3	253	static int tcf_ipt_dump(struct sk_buff skb, struct tc_action a, int bind, int ref)
1da177e4	254	{
27a884dc	255	unsigned char *b = skb_tail_pointer(skb);
e9ce1cd3	256	struct tcf_ipt *ipt = a->priv;
87a2e70d	257	struct xt_entry_target *t;
1da177e4 LT	258	struct tcf_t tm;
1da177e4 LT	259	struct tc_cnt c;
1da177e4 LT	260
1da177e4 LT	261	/* for simple targets kernel size == user size
cc7ec456 ED	262	* user name = target name
	263	* for foolproof you need to not assume this
	264	*/
1da177e4	265
c7b1b249	266	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
e9ce1cd3	267	if (unlikely(!t))
7ba699c6	268	goto nla_put_failure;
1da177e4	269
e9ce1cd3 DM	270	c.bindcnt = ipt->tcf_bindcnt - bind;
e9ce1cd3 DM	271	c.refcnt = ipt->tcf_refcnt - ref;
e9ce1cd3 DM	272	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
e9ce1cd3 DM	273
1b34ec43 DM	274	if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) \|\|
	275	nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) \|\|
	276	nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) \|\|
	277	nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) \|\|
	278	nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
	279	goto nla_put_failure;
e9ce1cd3 DM	280	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	281	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	282	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
1b34ec43 DM	283	if (nla_put(skb, TCA_IPT_TM, sizeof (tm), &tm))
1b34ec43 DM	284	goto nla_put_failure;
1da177e4 LT	285	kfree(t);
	286	return skb->len;
	287
7ba699c6	288	nla_put_failure:
dc5fc579	289	nlmsg_trim(skb, b);
1da177e4 LT	290	kfree(t);
	291	return -1;
	292	}
	293
	294	static struct tc_action_ops act_ipt_ops = {
	295	.kind = "ipt",
e9ce1cd3	296	.hinfo = &ipt_hash_info,
1da177e4 LT	297	.type = TCA_ACT_IPT,
	298	.capab = TCA_CAP_NONE,
	299	.owner = THIS_MODULE,
	300	.act = tcf_ipt,
	301	.dump = tcf_ipt_dump,
	302	.cleanup = tcf_ipt_cleanup,
	303	.lookup = tcf_hash_search,
	304	.init = tcf_ipt_init,
	305	.walk = tcf_generic_walker
	306	};
	307
	308	MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
	309	MODULE_DESCRIPTION("Iptables target actions");
	310	MODULE_LICENSE("GPL");
	311
e9ce1cd3	312	static int __init ipt_init_module(void)
1da177e4 LT	313	{
	314	return tcf_register_action(&act_ipt_ops);
	315	}
	316
e9ce1cd3	317	static void __exit ipt_cleanup_module(void)
1da177e4 LT	318	{
	319	tcf_unregister_action(&act_ipt_ops);
	320	}
	321
	322	module_init(ipt_init_module);
	323	module_exit(ipt_cleanup_module);