[deliverable/linux.git] / net / netfilter / xt_conntrack.c

/* Kernel module to match connection tracking information.
 * Superset of Rusty's minimalistic state match.
 *
 * (C) 2001  Marc Boucher (marc@mbsi.ca).
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/skbuff.h>

#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE)
#include <linux/netfilter_ipv4/ip_conntrack.h>
#include <linux/netfilter_ipv4/ip_conntrack_tuple.h>
#else
#include <net/netfilter/nf_conntrack.h>
#endif

#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_conntrack.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
MODULE_DESCRIPTION("iptables connection tracking match module");
MODULE_ALIAS("ipt_conntrack");

#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE)

static int
match(const struct sk_buff *skb,
      const struct net_device *in,
      const struct net_device *out,
      const struct xt_match *match,
      const void *matchinfo,
      int offset,
      unsigned int protoff,
      int *hotdrop)
{
	const struct xt_conntrack_info *sinfo = matchinfo;
	struct ip_conntrack *ct;
	enum ip_conntrack_info ctinfo;
	unsigned int statebit;

	ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo);

#define FWINV(bool, invflg) ((bool) ^ !!(sinfo->invflags & invflg))

	if (ct == &ip_conntrack_untracked)
		statebit = XT_CONNTRACK_STATE_UNTRACKED;
	else if (ct)
 		statebit = XT_CONNTRACK_STATE_BIT(ctinfo);
 	else
 		statebit = XT_CONNTRACK_STATE_INVALID;
 
	if (sinfo->flags & XT_CONNTRACK_STATE) {
		if (ct) {
			if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
				statebit |= XT_CONNTRACK_STATE_SNAT;
			if (test_bit(IPS_DST_NAT_BIT, &ct->status))
				statebit |= XT_CONNTRACK_STATE_DNAT;
		}
		if (FWINV((statebit & sinfo->statemask) == 0,
			  XT_CONNTRACK_STATE))
			return 0;
	}

	if (ct == NULL) {
		if (sinfo->flags & ~XT_CONNTRACK_STATE)
			return 0;
		return 1;
	}

	if (sinfo->flags & XT_CONNTRACK_PROTO &&
	    FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
		  sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
		  XT_CONNTRACK_PROTO))
                return 0;

	if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
	    FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip &
		   sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
		  XT_CONNTRACK_ORIGSRC))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
	    FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip &
		   sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
		  XT_CONNTRACK_ORIGDST))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
	    FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip &
		   sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
		  XT_CONNTRACK_REPLSRC))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_REPLDST &&
	    FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip &
		   sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
		  XT_CONNTRACK_REPLDST))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_STATUS &&
	    FWINV((ct->status & sinfo->statusmask) == 0,
		  XT_CONNTRACK_STATUS))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_EXPIRES) {
		unsigned long expires = timer_pending(&ct->timeout) ?
					(ct->timeout.expires - jiffies)/HZ : 0;

		if (FWINV(!(expires >= sinfo->expires_min &&
			    expires <= sinfo->expires_max),
			  XT_CONNTRACK_EXPIRES))
			return 0;
	}
	return 1;
}

#else /* CONFIG_IP_NF_CONNTRACK */
static int
match(const struct sk_buff *skb,
      const struct net_device *in,
      const struct net_device *out,
      const struct xt_match *match,
      const void *matchinfo,
      int offset,
      unsigned int protoff,
      int *hotdrop)
{
	const struct xt_conntrack_info *sinfo = matchinfo;
	struct nf_conn *ct;
	enum ip_conntrack_info ctinfo;
	unsigned int statebit;

	ct = nf_ct_get((struct sk_buff *)skb, &ctinfo);

#define FWINV(bool,invflg) ((bool) ^ !!(sinfo->invflags & invflg))

	if (ct == &nf_conntrack_untracked)
		statebit = XT_CONNTRACK_STATE_UNTRACKED;
	else if (ct)
 		statebit = XT_CONNTRACK_STATE_BIT(ctinfo);
 	else
 		statebit = XT_CONNTRACK_STATE_INVALID;
 
	if (sinfo->flags & XT_CONNTRACK_STATE) {
		if (ct) {
			if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
				statebit |= XT_CONNTRACK_STATE_SNAT;
			if (test_bit(IPS_DST_NAT_BIT, &ct->status))
				statebit |= XT_CONNTRACK_STATE_DNAT;
		}
		if (FWINV((statebit & sinfo->statemask) == 0,
			  XT_CONNTRACK_STATE))
			return 0;
	}

	if (ct == NULL) {
		if (sinfo->flags & ~XT_CONNTRACK_STATE)
			return 0;
		return 1;
	}

	if (sinfo->flags & XT_CONNTRACK_PROTO &&
	    FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
	    	  sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
		  XT_CONNTRACK_PROTO))
                return 0;

	if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
	    FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip &
	    	   sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
		  XT_CONNTRACK_ORIGSRC))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
	    FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip &
	    	   sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
		  XT_CONNTRACK_ORIGDST))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
	    FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip &
	    	   sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
		  XT_CONNTRACK_REPLSRC))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_REPLDST &&
	    FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip &
	    	   sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
		  sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
		  XT_CONNTRACK_REPLDST))
		return 0;

	if (sinfo->flags & XT_CONNTRACK_STATUS &&
	    FWINV((ct->status & sinfo->statusmask) == 0,
	    	  XT_CONNTRACK_STATUS))
		return 0;

	if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
		unsigned long expires = timer_pending(&ct->timeout) ?
					(ct->timeout.expires - jiffies)/HZ : 0;

		if (FWINV(!(expires >= sinfo->expires_min &&
			    expires <= sinfo->expires_max),
			  XT_CONNTRACK_EXPIRES))
			return 0;
	}
	return 1;
}

#endif /* CONFIG_NF_IP_CONNTRACK */

static int
checkentry(const char *tablename,
	   const void *ip,
	   const struct xt_match *match,
	   void *matchinfo,
	   unsigned int hook_mask)
{
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
	if (nf_ct_l3proto_try_module_get(match->family) < 0) {
		printk(KERN_WARNING "can't load nf_conntrack support for "
				    "proto=%d\n", match->family);
		return 0;
	}
#endif
	return 1;
}

static void destroy(const struct xt_match *match, void *matchinfo)
{
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
	nf_ct_l3proto_module_put(match->family);
#endif
}

static struct xt_match conntrack_match = {
	.name		= "conntrack",
	.match		= match,
	.checkentry	= checkentry,
	.destroy	= destroy,
	.matchsize	= sizeof(struct xt_conntrack_info),
	.family		= AF_INET,
	.me		= THIS_MODULE,
};

static int __init xt_conntrack_init(void)
{
	need_conntrack();
	return xt_register_match(&conntrack_match);
}

static void __exit xt_conntrack_fini(void)
{
	xt_unregister_match(&conntrack_match);
}

module_init(xt_conntrack_init);
module_exit(xt_conntrack_fini);
Commit	Line	Data
1da177e4 LT	1	/* Kernel module to match connection tracking information.
	2	* Superset of Rusty's minimalistic state match.
	3	*
	4	* (C) 2001 Marc Boucher (marc@mbsi.ca).
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/skbuff.h>
9fb9cbb1 YK	13
9fb9cbb1 YK	14	#if defined(CONFIG_IP_NF_CONNTRACK) \|\| defined(CONFIG_IP_NF_CONNTRACK_MODULE)
1da177e4	15	#include <linux/netfilter_ipv4/ip_conntrack.h>
9fb9cbb1 YK	16	#include <linux/netfilter_ipv4/ip_conntrack_tuple.h>
	17	#else
	18	#include <net/netfilter/nf_conntrack.h>
	19	#endif
	20
2e4e6a17 HW	21	#include <linux/netfilter/x_tables.h>
2e4e6a17 HW	22	#include <linux/netfilter/xt_conntrack.h>
1da177e4 LT	23
	24	MODULE_LICENSE("GPL");
	25	MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
	26	MODULE_DESCRIPTION("iptables connection tracking match module");
2e4e6a17	27	MODULE_ALIAS("ipt_conntrack");
1da177e4	28
9fb9cbb1 YK	29	#if defined(CONFIG_IP_NF_CONNTRACK) \|\| defined(CONFIG_IP_NF_CONNTRACK_MODULE)
9fb9cbb1 YK	30
1da177e4 LT	31	static int
	32	match(const struct sk_buff *skb,
	33	const struct net_device *in,
	34	const struct net_device *out,
c4986734	35	const struct xt_match *match,
1da177e4 LT	36	const void *matchinfo,
1da177e4 LT	37	int offset,
2e4e6a17	38	unsigned int protoff,
1da177e4 LT	39	int *hotdrop)
1da177e4 LT	40	{
2e4e6a17	41	const struct xt_conntrack_info *sinfo = matchinfo;
1da177e4 LT	42	struct ip_conntrack *ct;
	43	enum ip_conntrack_info ctinfo;
	44	unsigned int statebit;
	45
	46	ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo);
	47
50b9f1d5	48	#define FWINV(bool, invflg) ((bool) ^ !!(sinfo->invflags & invflg))
1da177e4 LT	49
1da177e4 LT	50	if (ct == &ip_conntrack_untracked)
2e4e6a17	51	statebit = XT_CONNTRACK_STATE_UNTRACKED;
1da177e4	52	else if (ct)
2e4e6a17	53	statebit = XT_CONNTRACK_STATE_BIT(ctinfo);
1da177e4	54	else
2e4e6a17	55	statebit = XT_CONNTRACK_STATE_INVALID;
1da177e4	56
50b9f1d5	57	if (sinfo->flags & XT_CONNTRACK_STATE) {
1da177e4	58	if (ct) {
50b9f1d5	59	if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
2e4e6a17	60	statebit \|= XT_CONNTRACK_STATE_SNAT;
50b9f1d5	61	if (test_bit(IPS_DST_NAT_BIT, &ct->status))
2e4e6a17	62	statebit \|= XT_CONNTRACK_STATE_DNAT;
1da177e4	63	}
50b9f1d5 PM	64	if (FWINV((statebit & sinfo->statemask) == 0,
50b9f1d5 PM	65	XT_CONNTRACK_STATE))
1da177e4 LT	66	return 0;
	67	}
	68
50b9f1d5 PM	69	if (ct == NULL) {
50b9f1d5 PM	70	if (sinfo->flags & ~XT_CONNTRACK_STATE)
1da177e4	71	return 0;
50b9f1d5	72	return 1;
1da177e4 LT	73	}
1da177e4 LT	74
50b9f1d5 PM	75	if (sinfo->flags & XT_CONNTRACK_PROTO &&
	76	FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
	77	sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
	78	XT_CONNTRACK_PROTO))
	79	return 0;
	80
	81	if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
	82	FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip &
	83	sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
	84	sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
	85	XT_CONNTRACK_ORIGSRC))
	86	return 0;
1da177e4	87
50b9f1d5 PM	88	if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
	89	FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip &
	90	sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
	91	sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
	92	XT_CONNTRACK_ORIGDST))
	93	return 0;
1da177e4	94
50b9f1d5 PM	95	if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
	96	FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip &
	97	sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
	98	sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
	99	XT_CONNTRACK_REPLSRC))
	100	return 0;
1da177e4	101
50b9f1d5 PM	102	if (sinfo->flags & XT_CONNTRACK_REPLDST &&
	103	FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip &
	104	sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
	105	sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
	106	XT_CONNTRACK_REPLDST))
	107	return 0;
1da177e4	108
50b9f1d5 PM	109	if (sinfo->flags & XT_CONNTRACK_STATUS &&
	110	FWINV((ct->status & sinfo->statusmask) == 0,
	111	XT_CONNTRACK_STATUS))
	112	return 0;
1da177e4	113
50b9f1d5 PM	114	if (sinfo->flags & XT_CONNTRACK_EXPIRES) {
	115	unsigned long expires = timer_pending(&ct->timeout) ?
	116	(ct->timeout.expires - jiffies)/HZ : 0;
1da177e4	117
50b9f1d5 PM	118	if (FWINV(!(expires >= sinfo->expires_min &&
	119	expires <= sinfo->expires_max),
	120	XT_CONNTRACK_EXPIRES))
1da177e4 LT	121	return 0;
1da177e4 LT	122	}
1da177e4 LT	123	return 1;
	124	}
	125
9fb9cbb1 YK	126	#else /* CONFIG_IP_NF_CONNTRACK */
	127	static int
	128	match(const struct sk_buff *skb,
	129	const struct net_device *in,
	130	const struct net_device *out,
c4986734	131	const struct xt_match *match,
9fb9cbb1 YK	132	const void *matchinfo,
9fb9cbb1 YK	133	int offset,
2e4e6a17	134	unsigned int protoff,
9fb9cbb1 YK	135	int *hotdrop)
9fb9cbb1 YK	136	{
2e4e6a17	137	const struct xt_conntrack_info *sinfo = matchinfo;
9fb9cbb1 YK	138	struct nf_conn *ct;
	139	enum ip_conntrack_info ctinfo;
	140	unsigned int statebit;
	141
	142	ct = nf_ct_get((struct sk_buff *)skb, &ctinfo);
	143
	144	#define FWINV(bool,invflg) ((bool) ^ !!(sinfo->invflags & invflg))
	145
	146	if (ct == &nf_conntrack_untracked)
2e4e6a17	147	statebit = XT_CONNTRACK_STATE_UNTRACKED;
9fb9cbb1	148	else if (ct)
2e4e6a17	149	statebit = XT_CONNTRACK_STATE_BIT(ctinfo);
9fb9cbb1	150	else
2e4e6a17	151	statebit = XT_CONNTRACK_STATE_INVALID;
9fb9cbb1	152
50b9f1d5	153	if (sinfo->flags & XT_CONNTRACK_STATE) {
9fb9cbb1	154	if (ct) {
50b9f1d5	155	if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
2e4e6a17	156	statebit \|= XT_CONNTRACK_STATE_SNAT;
50b9f1d5	157	if (test_bit(IPS_DST_NAT_BIT, &ct->status))
2e4e6a17	158	statebit \|= XT_CONNTRACK_STATE_DNAT;
9fb9cbb1	159	}
50b9f1d5 PM	160	if (FWINV((statebit & sinfo->statemask) == 0,
50b9f1d5 PM	161	XT_CONNTRACK_STATE))
9fb9cbb1 YK	162	return 0;
	163	}
	164
50b9f1d5 PM	165	if (ct == NULL) {
50b9f1d5 PM	166	if (sinfo->flags & ~XT_CONNTRACK_STATE)
9fb9cbb1	167	return 0;
50b9f1d5	168	return 1;
9fb9cbb1 YK	169	}
9fb9cbb1 YK	170
50b9f1d5 PM	171	if (sinfo->flags & XT_CONNTRACK_PROTO &&
	172	FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
	173	sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
	174	XT_CONNTRACK_PROTO))
	175	return 0;
	176
	177	if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
	178	FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip &
	179	sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
	180	sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
	181	XT_CONNTRACK_ORIGSRC))
	182	return 0;
9fb9cbb1	183
50b9f1d5 PM	184	if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
	185	FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip &
	186	sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
	187	sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
	188	XT_CONNTRACK_ORIGDST))
	189	return 0;
9fb9cbb1	190
50b9f1d5 PM	191	if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
	192	FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip &
	193	sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
	194	sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
	195	XT_CONNTRACK_REPLSRC))
	196	return 0;
9fb9cbb1	197
50b9f1d5 PM	198	if (sinfo->flags & XT_CONNTRACK_REPLDST &&
	199	FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip &
	200	sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
	201	sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
	202	XT_CONNTRACK_REPLDST))
	203	return 0;
9fb9cbb1	204
50b9f1d5 PM	205	if (sinfo->flags & XT_CONNTRACK_STATUS &&
	206	FWINV((ct->status & sinfo->statusmask) == 0,
	207	XT_CONNTRACK_STATUS))
	208	return 0;
9fb9cbb1	209
50b9f1d5 PM	210	if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
	211	unsigned long expires = timer_pending(&ct->timeout) ?
	212	(ct->timeout.expires - jiffies)/HZ : 0;
9fb9cbb1	213
50b9f1d5 PM	214	if (FWINV(!(expires >= sinfo->expires_min &&
	215	expires <= sinfo->expires_max),
	216	XT_CONNTRACK_EXPIRES))
9fb9cbb1 YK	217	return 0;
9fb9cbb1 YK	218	}
9fb9cbb1 YK	219	return 1;
	220	}
	221
	222	#endif /* CONFIG_NF_IP_CONNTRACK */
	223
b9f78f9f PNA	224	static int
	225	checkentry(const char *tablename,
	226	const void *ip,
	227	const struct xt_match *match,
	228	void *matchinfo,
b9f78f9f PNA	229	unsigned int hook_mask)
	230	{
	231	#if defined(CONFIG_NF_CONNTRACK) \|\| defined(CONFIG_NF_CONNTRACK_MODULE)
	232	if (nf_ct_l3proto_try_module_get(match->family) < 0) {
	233	printk(KERN_WARNING "can't load nf_conntrack support for "
	234	"proto=%d\n", match->family);
	235	return 0;
	236	}
	237	#endif
	238	return 1;
	239	}
	240
50b9f1d5	241	static void destroy(const struct xt_match match, void matchinfo)
b9f78f9f PNA	242	{
	243	#if defined(CONFIG_NF_CONNTRACK) \|\| defined(CONFIG_NF_CONNTRACK_MODULE)
	244	nf_ct_l3proto_module_put(match->family);
	245	#endif
	246	}
	247
2e4e6a17	248	static struct xt_match conntrack_match = {
1da177e4	249	.name = "conntrack",
5d04bff0	250	.match = match,
b9f78f9f PNA	251	.checkentry = checkentry,
b9f78f9f PNA	252	.destroy = destroy,
5d04bff0	253	.matchsize = sizeof(struct xt_conntrack_info),
a45049c5	254	.family = AF_INET,
1da177e4 LT	255	.me = THIS_MODULE,
	256	};
	257
65b4b4e8	258	static int __init xt_conntrack_init(void)
1da177e4	259	{
2e4e6a17	260	need_conntrack();
4470bbc7	261	return xt_register_match(&conntrack_match);
1da177e4 LT	262	}
1da177e4 LT	263
65b4b4e8	264	static void __exit xt_conntrack_fini(void)
1da177e4	265	{
a45049c5	266	xt_unregister_match(&conntrack_match);
1da177e4 LT	267	}
1da177e4 LT	268
65b4b4e8 AM	269	module_init(xt_conntrack_init);
65b4b4e8 AM	270	module_exit(xt_conntrack_fini);