[deliverable/linux.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_net_id;

static int xt_net_id;

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 tc_action_net *tn, 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(tn, index, a, bind)) {
		ret = tcf_hash_create(tn, 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(tn, 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_init(struct net *net, struct nlattr *nla,
			struct nlattr *est, struct tc_action *a, int ovr,
			int bind)
{
	struct tc_action_net *tn = net_generic(net, ipt_net_id);

	return __tcf_ipt_init(tn, nla, est, a, ovr, bind);
}

static int tcf_xt_init(struct net *net, struct nlattr *nla,
		       struct nlattr *est, struct tc_action *a, int ovr,
		       int bind)
{
	struct tc_action_net *tn = net_generic(net, xt_net_id);

	return __tcf_ipt_init(tn, nla, est, a, ovr, 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_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 int tcf_ipt_walker(struct net *net, struct sk_buff *skb,
			  struct netlink_callback *cb, int type,
			  struct tc_action *a)
{
	struct tc_action_net *tn = net_generic(net, ipt_net_id);

	return tcf_generic_walker(tn, skb, cb, type, a);
}

static int tcf_ipt_search(struct net *net, struct tc_action *a, u32 index)
{
	struct tc_action_net *tn = net_generic(net, ipt_net_id);

	return tcf_hash_search(tn, a, index);
}

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,
	.walk		=	tcf_ipt_walker,
	.lookup		=	tcf_ipt_search,
};

static __net_init int ipt_init_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, ipt_net_id);

	return tc_action_net_init(tn, &act_ipt_ops, IPT_TAB_MASK);
}

static void __net_exit ipt_exit_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, ipt_net_id);

	tc_action_net_exit(tn);
}

static struct pernet_operations ipt_net_ops = {
	.init = ipt_init_net,
	.exit = ipt_exit_net,
	.id   = &ipt_net_id,
	.size = sizeof(struct tc_action_net),
};

static int tcf_xt_walker(struct net *net, struct sk_buff *skb,
			 struct netlink_callback *cb, int type,
			 struct tc_action *a)
{
	struct tc_action_net *tn = net_generic(net, xt_net_id);

	return tcf_generic_walker(tn, skb, cb, type, a);
}

static int tcf_xt_search(struct net *net, struct tc_action *a, u32 index)
{
	struct tc_action_net *tn = net_generic(net, xt_net_id);

	return tcf_hash_search(tn, a, index);
}

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_xt_init,
	.walk		=	tcf_xt_walker,
	.lookup		=	tcf_xt_search,
};

static __net_init int xt_init_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, xt_net_id);

	return tc_action_net_init(tn, &act_xt_ops, IPT_TAB_MASK);
}

static void __net_exit xt_exit_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, xt_net_id);

	tc_action_net_exit(tn);
}

static struct pernet_operations xt_net_ops = {
	.init = xt_init_net,
	.exit = xt_exit_net,
	.id   = &xt_net_id,
	.size = sizeof(struct tc_action_net),
};

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, &xt_net_ops);
	if (ret1 < 0)
		pr_err("Failed to load xt action\n");

	ret2 = tcf_register_action(&act_ipt_ops, &ipt_net_ops);
	if (ret2 < 0)
		pr_err("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_ipt_ops, &ipt_net_ops);
	tcf_unregister_action(&act_xt_ops, &xt_net_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
ddf97ccd WC	33	static int ipt_net_id;
	34
	35	static int xt_net_id;
	36
87a2e70d	37	static int ipt_init_target(struct xt_entry_target t, char table, unsigned int hook)
1da177e4	38	{
af5d6dc2	39	struct xt_tgchk_param par;
e60a13e0	40	struct xt_target *target;
1da177e4 LT	41	int ret = 0;
1da177e4 LT	42
239a87c8 PM	43	target = xt_request_find_target(AF_INET, t->u.user.name,
239a87c8 PM	44	t->u.user.revision);
d2a7b6ba JE	45	if (IS_ERR(target))
d2a7b6ba JE	46	return PTR_ERR(target);
1da177e4	47
1da177e4	48	t->u.kernel.target = target;
af5d6dc2 JE	49	par.table = table;
	50	par.entryinfo = NULL;
	51	par.target = target;
	52	par.targinfo = t->data;
	53	par.hook_mask = hook;
916a917d	54	par.family = NFPROTO_IPV4;
1da177e4	55
916a917d	56	ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
367c6790	57	if (ret < 0) {
239a87c8	58	module_put(t->u.kernel.target->me);
18118cdb	59	return ret;
239a87c8	60	}
367c6790	61	return 0;
1da177e4 LT	62	}
1da177e4 LT	63
87a2e70d	64	static void ipt_destroy_target(struct xt_entry_target *t)
1da177e4	65	{
a2df1648 JE	66	struct xt_tgdtor_param par = {
	67	.target = t->u.kernel.target,
	68	.targinfo = t->data,
	69	};
	70	if (par.target->destroy != NULL)
	71	par.target->destroy(&par);
	72	module_put(par.target->me);
1da177e4 LT	73	}
1da177e4 LT	74
a5b5c958	75	static void tcf_ipt_release(struct tc_action *a, int bind)
1da177e4	76	{
86062033	77	struct tcf_ipt *ipt = to_ipt(a);
a5b5c958 WC	78	ipt_destroy_target(ipt->tcfi_t);
	79	kfree(ipt->tcfi_tname);
	80	kfree(ipt->tcfi_t);
1da177e4 LT	81	}
1da177e4 LT	82
53b2bf3f PM	83	static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
	84	[TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
	85	[TCA_IPT_HOOK] = { .type = NLA_U32 },
	86	[TCA_IPT_INDEX] = { .type = NLA_U32 },
87a2e70d	87	[TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
53b2bf3f PM	88	};
53b2bf3f PM	89
ddf97ccd WC	90	static int __tcf_ipt_init(struct tc_action_net tn, struct nlattr nla,
	91	struct nlattr est, struct tc_action a, int ovr,
	92	int bind)
1da177e4	93	{
7ba699c6	94	struct nlattr *tb[TCA_IPT_MAX + 1];
e9ce1cd3	95	struct tcf_ipt *ipt;
87a2e70d	96	struct xt_entry_target td, t;
1da177e4 LT	97	char *tname;
	98	int ret = 0, err;
	99	u32 hook = 0;
	100	u32 index = 0;
	101
cee63723	102	if (nla == NULL)
1da177e4 LT	103	return -EINVAL;
1da177e4 LT	104
53b2bf3f	105	err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
cee63723 PM	106	if (err < 0)
	107	return err;
	108
53b2bf3f	109	if (tb[TCA_IPT_HOOK] == NULL)
1da177e4	110	return -EINVAL;
53b2bf3f	111	if (tb[TCA_IPT_TARG] == NULL)
1da177e4	112	return -EINVAL;
53b2bf3f	113
87a2e70d	114	td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
7ba699c6	115	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
1da177e4 LT	116	return -EINVAL;
1da177e4 LT	117
53b2bf3f	118	if (tb[TCA_IPT_INDEX] != NULL)
1587bac4	119	index = nla_get_u32(tb[TCA_IPT_INDEX]);
1da177e4	120
ddf97ccd WC	121	if (!tcf_hash_check(tn, index, a, bind)) {
	122	ret = tcf_hash_create(tn, index, est, a, sizeof(*ipt), bind,
	123	false);
86062033 WC	124	if (ret)
86062033 WC	125	return ret;
1da177e4 LT	126	ret = ACT_P_CREATED;
1da177e4 LT	127	} else {
1a29321e JHS	128	if (bind)/* dont override defaults */
1a29321e JHS	129	return 0;
a5b5c958	130	tcf_hash_release(a, bind);
1a29321e JHS	131
1a29321e JHS	132	if (!ovr)
1da177e4	133	return -EEXIST;
1da177e4	134	}
86062033	135	ipt = to_ipt(a);
1da177e4	136
1587bac4	137	hook = nla_get_u32(tb[TCA_IPT_HOOK]);
1da177e4 LT	138
	139	err = -ENOMEM;
	140	tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
e9ce1cd3	141	if (unlikely(!tname))
1da177e4	142	goto err1;
7ba699c6 PM	143	if (tb[TCA_IPT_TABLE] == NULL \|\|
7ba699c6 PM	144	nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
1da177e4 LT	145	strcpy(tname, "mangle");
1da177e4 LT	146
c7b1b249	147	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
e9ce1cd3	148	if (unlikely(!t))
1da177e4	149	goto err2;
1da177e4	150
cc7ec456 ED	151	err = ipt_init_target(t, tname, hook);
cc7ec456 ED	152	if (err < 0)
1da177e4 LT	153	goto err3;
1da177e4 LT	154
e9ce1cd3	155	spin_lock_bh(&ipt->tcf_lock);
1da177e4	156	if (ret != ACT_P_CREATED) {
e9ce1cd3 DM	157	ipt_destroy_target(ipt->tcfi_t);
	158	kfree(ipt->tcfi_tname);
	159	kfree(ipt->tcfi_t);
1da177e4	160	}
e9ce1cd3 DM	161	ipt->tcfi_tname = tname;
	162	ipt->tcfi_t = t;
	163	ipt->tcfi_hook = hook;
	164	spin_unlock_bh(&ipt->tcf_lock);
1da177e4	165	if (ret == ACT_P_CREATED)
ddf97ccd	166	tcf_hash_insert(tn, a);
1da177e4 LT	167	return ret;
	168
	169	err3:
	170	kfree(t);
	171	err2:
	172	kfree(tname);
	173	err1:
86062033 WC	174	if (ret == ACT_P_CREATED)
86062033 WC	175	tcf_hash_cleanup(a, est);
1da177e4 LT	176	return err;
	177	}
	178
ddf97ccd WC	179	static int tcf_ipt_init(struct net net, struct nlattr nla,
	180	struct nlattr est, struct tc_action a, int ovr,
	181	int bind)
	182	{
	183	struct tc_action_net *tn = net_generic(net, ipt_net_id);
	184
	185	return __tcf_ipt_init(tn, nla, est, a, ovr, bind);
	186	}
	187
	188	static int tcf_xt_init(struct net net, struct nlattr nla,
	189	struct nlattr est, struct tc_action a, int ovr,
	190	int bind)
	191	{
	192	struct tc_action_net *tn = net_generic(net, xt_net_id);
	193
	194	return __tcf_ipt_init(tn, nla, est, a, ovr, bind);
	195	}
	196
dc7f9f6e	197	static int tcf_ipt(struct sk_buff skb, const struct tc_action a,
e9ce1cd3	198	struct tcf_result *res)
1da177e4 LT	199	{
1da177e4 LT	200	int ret = 0, result = 0;
e9ce1cd3	201	struct tcf_ipt *ipt = a->priv;
4b560b44	202	struct xt_action_param par;
1da177e4	203
14bbd6a5 PS	204	if (skb_unclone(skb, GFP_ATOMIC))
14bbd6a5 PS	205	return TC_ACT_UNSPEC;
1da177e4	206
e9ce1cd3	207	spin_lock(&ipt->tcf_lock);
1da177e4	208
e9ce1cd3	209	ipt->tcf_tm.lastuse = jiffies;
bfe0d029	210	bstats_update(&ipt->tcf_bstats, skb);
1da177e4 LT	211
1da177e4 LT	212	/* yes, we have to worry about both in and out dev
cc7ec456 ED	213	* worry later - danger - this API seems to have changed
	214	* from earlier kernels
	215	*/
156c196f	216	par.net = dev_net(skb->dev);
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	231	break;
243bf6e2	232	case XT_CONTINUE:
1da177e4 LT	233	result = TC_ACT_PIPE;
	234	break;
	235	default:
e87cc472 JP	236	net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
e87cc472 JP	237	ret);
1da177e4 LT	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;
87a2e70d	250	struct xt_entry_target *t;
1da177e4 LT	251	struct tcf_t tm;
1da177e4 LT	252	struct tc_cnt c;
1da177e4 LT	253
1da177e4 LT	254	/* for simple targets kernel size == user size
cc7ec456 ED	255	* user name = target name
	256	* for foolproof you need to not assume this
	257	*/
1da177e4	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
1b34ec43 DM	267	if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) \|\|
	268	nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) \|\|
	269	nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) \|\|
	270	nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) \|\|
	271	nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
	272	goto nla_put_failure;
e9ce1cd3 DM	273	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
	274	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
	275	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
1b34ec43 DM	276	if (nla_put(skb, TCA_IPT_TM, sizeof (tm), &tm))
1b34ec43 DM	277	goto nla_put_failure;
1da177e4 LT	278	kfree(t);
	279	return skb->len;
	280
7ba699c6	281	nla_put_failure:
dc5fc579	282	nlmsg_trim(skb, b);
1da177e4 LT	283	kfree(t);
	284	return -1;
	285	}
	286
ddf97ccd WC	287	static int tcf_ipt_walker(struct net net, struct sk_buff skb,
	288	struct netlink_callback *cb, int type,
	289	struct tc_action *a)
	290	{
	291	struct tc_action_net *tn = net_generic(net, ipt_net_id);
	292
	293	return tcf_generic_walker(tn, skb, cb, type, a);
	294	}
	295
	296	static int tcf_ipt_search(struct net net, struct tc_action a, u32 index)
	297	{
	298	struct tc_action_net *tn = net_generic(net, ipt_net_id);
	299
	300	return tcf_hash_search(tn, a, index);
	301	}
	302
1da177e4 LT	303	static struct tc_action_ops act_ipt_ops = {
	304	.kind = "ipt",
	305	.type = TCA_ACT_IPT,
1da177e4 LT	306	.owner = THIS_MODULE,
	307	.act = tcf_ipt,
	308	.dump = tcf_ipt_dump,
86062033	309	.cleanup = tcf_ipt_release,
1da177e4	310	.init = tcf_ipt_init,
ddf97ccd WC	311	.walk = tcf_ipt_walker,
	312	.lookup = tcf_ipt_search,
	313	};
	314
	315	static __net_init int ipt_init_net(struct net *net)
	316	{
	317	struct tc_action_net *tn = net_generic(net, ipt_net_id);
	318
	319	return tc_action_net_init(tn, &act_ipt_ops, IPT_TAB_MASK);
	320	}
	321
	322	static void __net_exit ipt_exit_net(struct net *net)
	323	{
	324	struct tc_action_net *tn = net_generic(net, ipt_net_id);
	325
	326	tc_action_net_exit(tn);
	327	}
	328
	329	static struct pernet_operations ipt_net_ops = {
	330	.init = ipt_init_net,
	331	.exit = ipt_exit_net,
	332	.id = &ipt_net_id,
	333	.size = sizeof(struct tc_action_net),
1da177e4 LT	334	};
1da177e4 LT	335
ddf97ccd WC	336	static int tcf_xt_walker(struct net net, struct sk_buff skb,
	337	struct netlink_callback *cb, int type,
	338	struct tc_action *a)
	339	{
	340	struct tc_action_net *tn = net_generic(net, xt_net_id);
	341
	342	return tcf_generic_walker(tn, skb, cb, type, a);
	343	}
	344
	345	static int tcf_xt_search(struct net net, struct tc_action a, u32 index)
	346	{
	347	struct tc_action_net *tn = net_generic(net, xt_net_id);
	348
	349	return tcf_hash_search(tn, a, index);
	350	}
	351
0dcffd09 JHS	352	static struct tc_action_ops act_xt_ops = {
0dcffd09 JHS	353	.kind = "xt",
6c80563c	354	.type = TCA_ACT_XT,
0dcffd09 JHS	355	.owner = THIS_MODULE,
	356	.act = tcf_ipt,
	357	.dump = tcf_ipt_dump,
86062033	358	.cleanup = tcf_ipt_release,
ddf97ccd WC	359	.init = tcf_xt_init,
	360	.walk = tcf_xt_walker,
	361	.lookup = tcf_xt_search,
	362	};
	363
	364	static __net_init int xt_init_net(struct net *net)
	365	{
	366	struct tc_action_net *tn = net_generic(net, xt_net_id);
	367
	368	return tc_action_net_init(tn, &act_xt_ops, IPT_TAB_MASK);
	369	}
	370
	371	static void __net_exit xt_exit_net(struct net *net)
	372	{
	373	struct tc_action_net *tn = net_generic(net, xt_net_id);
	374
	375	tc_action_net_exit(tn);
	376	}
	377
	378	static struct pernet_operations xt_net_ops = {
	379	.init = xt_init_net,
	380	.exit = xt_exit_net,
	381	.id = &xt_net_id,
	382	.size = sizeof(struct tc_action_net),
0dcffd09 JHS	383	};
	384
	385	MODULE_AUTHOR("Jamal Hadi Salim(2002-13)");
1da177e4 LT	386	MODULE_DESCRIPTION("Iptables target actions");
1da177e4 LT	387	MODULE_LICENSE("GPL");
0dcffd09	388	MODULE_ALIAS("act_xt");
1da177e4	389
e9ce1cd3	390	static int __init ipt_init_module(void)
1da177e4	391	{
4f1e9d89	392	int ret1, ret2;
369ba567	393
ddf97ccd	394	ret1 = tcf_register_action(&act_xt_ops, &xt_net_ops);
0dcffd09	395	if (ret1 < 0)
ddf97ccd WC	396	pr_err("Failed to load xt action\n");
	397
	398	ret2 = tcf_register_action(&act_ipt_ops, &ipt_net_ops);
0dcffd09	399	if (ret2 < 0)
ddf97ccd	400	pr_err("Failed to load ipt action\n");
0dcffd09	401
369ba567	402	if (ret1 < 0 && ret2 < 0) {
0dcffd09	403	return ret1;
369ba567	404	} else
0dcffd09	405	return 0;
1da177e4 LT	406	}
1da177e4 LT	407
e9ce1cd3	408	static void __exit ipt_cleanup_module(void)
1da177e4	409	{
ddf97ccd WC	410	tcf_unregister_action(&act_ipt_ops, &ipt_net_ops);
ddf97ccd WC	411	tcf_unregister_action(&act_xt_ops, &xt_net_ops);
1da177e4 LT	412	}
	413
	414	module_init(ipt_init_module);
	415	module_exit(ipt_cleanup_module);