2 * (C) 2012-2013 by Pablo Neira Ayuso <pablo@netfilter.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/netlink.h>
15 #include <linux/netfilter.h>
16 #include <linux/netfilter/nfnetlink.h>
17 #include <linux/netfilter/nf_tables.h>
18 #include <linux/netfilter/nf_tables_compat.h>
19 #include <linux/netfilter/x_tables.h>
20 #include <linux/netfilter_ipv4/ip_tables.h>
21 #include <linux/netfilter_ipv6/ip6_tables.h>
22 #include <linux/netfilter_bridge/ebtables.h>
23 #include <net/netfilter/nf_tables.h>
25 static int nft_compat_chain_validate_dependency(const char *tablename
,
26 const struct nft_chain
*chain
)
28 const struct nft_base_chain
*basechain
;
30 if (!tablename
|| !(chain
->flags
& NFT_BASE_CHAIN
))
33 basechain
= nft_base_chain(chain
);
34 if (strcmp(tablename
, "nat") == 0 &&
35 basechain
->type
->type
!= NFT_CHAIN_T_NAT
)
48 nft_compat_set_par(struct xt_action_param
*par
, void *xt
, const void *xt_info
)
51 par
->targinfo
= xt_info
;
55 static void nft_target_eval_xt(const struct nft_expr
*expr
,
56 struct nft_data data
[NFT_REG_MAX
+ 1],
57 const struct nft_pktinfo
*pkt
)
59 void *info
= nft_expr_priv(expr
);
60 struct xt_target
*target
= expr
->ops
->data
;
61 struct sk_buff
*skb
= pkt
->skb
;
64 nft_compat_set_par((struct xt_action_param
*)&pkt
->xt
, target
, info
);
66 ret
= target
->target(skb
, &pkt
->xt
);
73 data
[NFT_REG_VERDICT
].verdict
= NFT_CONTINUE
;
76 data
[NFT_REG_VERDICT
].verdict
= ret
;
81 static void nft_target_eval_bridge(const struct nft_expr
*expr
,
82 struct nft_data data
[NFT_REG_MAX
+ 1],
83 const struct nft_pktinfo
*pkt
)
85 void *info
= nft_expr_priv(expr
);
86 struct xt_target
*target
= expr
->ops
->data
;
87 struct sk_buff
*skb
= pkt
->skb
;
90 nft_compat_set_par((struct xt_action_param
*)&pkt
->xt
, target
, info
);
92 ret
= target
->target(skb
, &pkt
->xt
);
99 data
[NFT_REG_VERDICT
].verdict
= NF_ACCEPT
;
102 data
[NFT_REG_VERDICT
].verdict
= NF_DROP
;
105 data
[NFT_REG_VERDICT
].verdict
= NFT_CONTINUE
;
108 data
[NFT_REG_VERDICT
].verdict
= NFT_RETURN
;
111 data
[NFT_REG_VERDICT
].verdict
= ret
;
116 static const struct nla_policy nft_target_policy
[NFTA_TARGET_MAX
+ 1] = {
117 [NFTA_TARGET_NAME
] = { .type
= NLA_NUL_STRING
},
118 [NFTA_TARGET_REV
] = { .type
= NLA_U32
},
119 [NFTA_TARGET_INFO
] = { .type
= NLA_BINARY
},
123 nft_target_set_tgchk_param(struct xt_tgchk_param
*par
,
124 const struct nft_ctx
*ctx
,
125 struct xt_target
*target
, void *info
,
126 union nft_entry
*entry
, u16 proto
, bool inv
)
129 par
->table
= ctx
->table
->name
;
130 switch (ctx
->afi
->family
) {
132 entry
->e4
.ip
.proto
= proto
;
133 entry
->e4
.ip
.invflags
= inv
? IPT_INV_PROTO
: 0;
136 entry
->e6
.ipv6
.proto
= proto
;
137 entry
->e6
.ipv6
.invflags
= inv
? IP6T_INV_PROTO
: 0;
140 entry
->ebt
.ethproto
= (__force __be16
)proto
;
141 entry
->ebt
.invflags
= inv
? EBT_IPROTO
: 0;
144 par
->entryinfo
= entry
;
145 par
->target
= target
;
146 par
->targinfo
= info
;
147 if (ctx
->chain
->flags
& NFT_BASE_CHAIN
) {
148 const struct nft_base_chain
*basechain
=
149 nft_base_chain(ctx
->chain
);
150 const struct nf_hook_ops
*ops
= &basechain
->ops
[0];
152 par
->hook_mask
= 1 << ops
->hooknum
;
156 par
->family
= ctx
->afi
->family
;
159 static void target_compat_from_user(struct xt_target
*t
, void *in
, void *out
)
163 memcpy(out
, in
, t
->targetsize
);
164 pad
= XT_ALIGN(t
->targetsize
) - t
->targetsize
;
166 memset(out
+ t
->targetsize
, 0, pad
);
169 static const struct nla_policy nft_rule_compat_policy
[NFTA_RULE_COMPAT_MAX
+ 1] = {
170 [NFTA_RULE_COMPAT_PROTO
] = { .type
= NLA_U32
},
171 [NFTA_RULE_COMPAT_FLAGS
] = { .type
= NLA_U32
},
174 static int nft_parse_compat(const struct nlattr
*attr
, u16
*proto
, bool *inv
)
176 struct nlattr
*tb
[NFTA_RULE_COMPAT_MAX
+1];
180 err
= nla_parse_nested(tb
, NFTA_RULE_COMPAT_MAX
, attr
,
181 nft_rule_compat_policy
);
185 if (!tb
[NFTA_RULE_COMPAT_PROTO
] || !tb
[NFTA_RULE_COMPAT_FLAGS
])
188 flags
= ntohl(nla_get_be32(tb
[NFTA_RULE_COMPAT_FLAGS
]));
189 if (flags
& ~NFT_RULE_COMPAT_F_MASK
)
191 if (flags
& NFT_RULE_COMPAT_F_INV
)
194 *proto
= ntohl(nla_get_be32(tb
[NFTA_RULE_COMPAT_PROTO
]));
199 nft_target_init(const struct nft_ctx
*ctx
, const struct nft_expr
*expr
,
200 const struct nlattr
* const tb
[])
202 void *info
= nft_expr_priv(expr
);
203 struct xt_target
*target
= expr
->ops
->data
;
204 struct xt_tgchk_param par
;
205 size_t size
= XT_ALIGN(nla_len(tb
[NFTA_TARGET_INFO
]));
208 union nft_entry e
= {};
211 ret
= nft_compat_chain_validate_dependency(target
->table
, ctx
->chain
);
215 target_compat_from_user(target
, nla_data(tb
[NFTA_TARGET_INFO
]), info
);
217 if (ctx
->nla
[NFTA_RULE_COMPAT
]) {
218 ret
= nft_parse_compat(ctx
->nla
[NFTA_RULE_COMPAT
], &proto
, &inv
);
223 nft_target_set_tgchk_param(&par
, ctx
, target
, info
, &e
, proto
, inv
);
225 ret
= xt_check_target(&par
, size
, proto
, inv
);
229 /* The standard target cannot be used */
230 if (target
->target
== NULL
) {
237 module_put(target
->me
);
242 nft_target_destroy(const struct nft_ctx
*ctx
, const struct nft_expr
*expr
)
244 struct xt_target
*target
= expr
->ops
->data
;
245 void *info
= nft_expr_priv(expr
);
246 struct xt_tgdtor_param par
;
251 par
.family
= ctx
->afi
->family
;
252 if (par
.target
->destroy
!= NULL
)
253 par
.target
->destroy(&par
);
255 module_put(target
->me
);
258 static int nft_target_dump(struct sk_buff
*skb
, const struct nft_expr
*expr
)
260 const struct xt_target
*target
= expr
->ops
->data
;
261 void *info
= nft_expr_priv(expr
);
263 if (nla_put_string(skb
, NFTA_TARGET_NAME
, target
->name
) ||
264 nla_put_be32(skb
, NFTA_TARGET_REV
, htonl(target
->revision
)) ||
265 nla_put(skb
, NFTA_TARGET_INFO
, XT_ALIGN(target
->targetsize
), info
))
266 goto nla_put_failure
;
274 static int nft_target_validate(const struct nft_ctx
*ctx
,
275 const struct nft_expr
*expr
,
276 const struct nft_data
**data
)
278 struct xt_target
*target
= expr
->ops
->data
;
279 unsigned int hook_mask
= 0;
282 if (ctx
->chain
->flags
& NFT_BASE_CHAIN
) {
283 const struct nft_base_chain
*basechain
=
284 nft_base_chain(ctx
->chain
);
285 const struct nf_hook_ops
*ops
= &basechain
->ops
[0];
287 hook_mask
= 1 << ops
->hooknum
;
288 if (!(hook_mask
& target
->hooks
))
291 ret
= nft_compat_chain_validate_dependency(target
->table
,
299 static void nft_match_eval(const struct nft_expr
*expr
,
300 struct nft_data data
[NFT_REG_MAX
+ 1],
301 const struct nft_pktinfo
*pkt
)
303 void *info
= nft_expr_priv(expr
);
304 struct xt_match
*match
= expr
->ops
->data
;
305 struct sk_buff
*skb
= pkt
->skb
;
308 nft_compat_set_par((struct xt_action_param
*)&pkt
->xt
, match
, info
);
310 ret
= match
->match(skb
, (struct xt_action_param
*)&pkt
->xt
);
312 if (pkt
->xt
.hotdrop
) {
313 data
[NFT_REG_VERDICT
].verdict
= NF_DROP
;
319 data
[NFT_REG_VERDICT
].verdict
= NFT_CONTINUE
;
322 data
[NFT_REG_VERDICT
].verdict
= NFT_BREAK
;
327 static const struct nla_policy nft_match_policy
[NFTA_MATCH_MAX
+ 1] = {
328 [NFTA_MATCH_NAME
] = { .type
= NLA_NUL_STRING
},
329 [NFTA_MATCH_REV
] = { .type
= NLA_U32
},
330 [NFTA_MATCH_INFO
] = { .type
= NLA_BINARY
},
333 /* struct xt_mtchk_param and xt_tgchk_param look very similar */
335 nft_match_set_mtchk_param(struct xt_mtchk_param
*par
, const struct nft_ctx
*ctx
,
336 struct xt_match
*match
, void *info
,
337 union nft_entry
*entry
, u16 proto
, bool inv
)
340 par
->table
= ctx
->table
->name
;
341 switch (ctx
->afi
->family
) {
343 entry
->e4
.ip
.proto
= proto
;
344 entry
->e4
.ip
.invflags
= inv
? IPT_INV_PROTO
: 0;
347 entry
->e6
.ipv6
.proto
= proto
;
348 entry
->e6
.ipv6
.invflags
= inv
? IP6T_INV_PROTO
: 0;
351 entry
->ebt
.ethproto
= (__force __be16
)proto
;
352 entry
->ebt
.invflags
= inv
? EBT_IPROTO
: 0;
355 par
->entryinfo
= entry
;
357 par
->matchinfo
= info
;
358 if (ctx
->chain
->flags
& NFT_BASE_CHAIN
) {
359 const struct nft_base_chain
*basechain
=
360 nft_base_chain(ctx
->chain
);
361 const struct nf_hook_ops
*ops
= &basechain
->ops
[0];
363 par
->hook_mask
= 1 << ops
->hooknum
;
367 par
->family
= ctx
->afi
->family
;
370 static void match_compat_from_user(struct xt_match
*m
, void *in
, void *out
)
374 memcpy(out
, in
, m
->matchsize
);
375 pad
= XT_ALIGN(m
->matchsize
) - m
->matchsize
;
377 memset(out
+ m
->matchsize
, 0, pad
);
381 nft_match_init(const struct nft_ctx
*ctx
, const struct nft_expr
*expr
,
382 const struct nlattr
* const tb
[])
384 void *info
= nft_expr_priv(expr
);
385 struct xt_match
*match
= expr
->ops
->data
;
386 struct xt_mtchk_param par
;
387 size_t size
= XT_ALIGN(nla_len(tb
[NFTA_MATCH_INFO
]));
390 union nft_entry e
= {};
393 ret
= nft_compat_chain_validate_dependency(match
->table
, ctx
->chain
);
397 match_compat_from_user(match
, nla_data(tb
[NFTA_MATCH_INFO
]), info
);
399 if (ctx
->nla
[NFTA_RULE_COMPAT
]) {
400 ret
= nft_parse_compat(ctx
->nla
[NFTA_RULE_COMPAT
], &proto
, &inv
);
405 nft_match_set_mtchk_param(&par
, ctx
, match
, info
, &e
, proto
, inv
);
407 ret
= xt_check_match(&par
, size
, proto
, inv
);
413 module_put(match
->me
);
418 nft_match_destroy(const struct nft_ctx
*ctx
, const struct nft_expr
*expr
)
420 struct xt_match
*match
= expr
->ops
->data
;
421 void *info
= nft_expr_priv(expr
);
422 struct xt_mtdtor_param par
;
426 par
.matchinfo
= info
;
427 par
.family
= ctx
->afi
->family
;
428 if (par
.match
->destroy
!= NULL
)
429 par
.match
->destroy(&par
);
431 module_put(match
->me
);
434 static int nft_match_dump(struct sk_buff
*skb
, const struct nft_expr
*expr
)
436 void *info
= nft_expr_priv(expr
);
437 struct xt_match
*match
= expr
->ops
->data
;
439 if (nla_put_string(skb
, NFTA_MATCH_NAME
, match
->name
) ||
440 nla_put_be32(skb
, NFTA_MATCH_REV
, htonl(match
->revision
)) ||
441 nla_put(skb
, NFTA_MATCH_INFO
, XT_ALIGN(match
->matchsize
), info
))
442 goto nla_put_failure
;
450 static int nft_match_validate(const struct nft_ctx
*ctx
,
451 const struct nft_expr
*expr
,
452 const struct nft_data
**data
)
454 struct xt_match
*match
= expr
->ops
->data
;
455 unsigned int hook_mask
= 0;
458 if (ctx
->chain
->flags
& NFT_BASE_CHAIN
) {
459 const struct nft_base_chain
*basechain
=
460 nft_base_chain(ctx
->chain
);
461 const struct nf_hook_ops
*ops
= &basechain
->ops
[0];
463 hook_mask
= 1 << ops
->hooknum
;
464 if (!(hook_mask
& match
->hooks
))
467 ret
= nft_compat_chain_validate_dependency(match
->table
,
476 nfnl_compat_fill_info(struct sk_buff
*skb
, u32 portid
, u32 seq
, u32 type
,
477 int event
, u16 family
, const char *name
,
480 struct nlmsghdr
*nlh
;
481 struct nfgenmsg
*nfmsg
;
482 unsigned int flags
= portid
? NLM_F_MULTI
: 0;
484 event
|= NFNL_SUBSYS_NFT_COMPAT
<< 8;
485 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*nfmsg
), flags
);
489 nfmsg
= nlmsg_data(nlh
);
490 nfmsg
->nfgen_family
= family
;
491 nfmsg
->version
= NFNETLINK_V0
;
494 if (nla_put_string(skb
, NFTA_COMPAT_NAME
, name
) ||
495 nla_put_be32(skb
, NFTA_COMPAT_REV
, htonl(rev
)) ||
496 nla_put_be32(skb
, NFTA_COMPAT_TYPE
, htonl(target
)))
497 goto nla_put_failure
;
504 nlmsg_cancel(skb
, nlh
);
509 nfnl_compat_get(struct sock
*nfnl
, struct sk_buff
*skb
,
510 const struct nlmsghdr
*nlh
, const struct nlattr
* const tb
[])
513 struct nfgenmsg
*nfmsg
;
517 struct sk_buff
*skb2
;
519 if (tb
[NFTA_COMPAT_NAME
] == NULL
||
520 tb
[NFTA_COMPAT_REV
] == NULL
||
521 tb
[NFTA_COMPAT_TYPE
] == NULL
)
524 name
= nla_data(tb
[NFTA_COMPAT_NAME
]);
525 rev
= ntohl(nla_get_be32(tb
[NFTA_COMPAT_REV
]));
526 target
= ntohl(nla_get_be32(tb
[NFTA_COMPAT_TYPE
]));
528 nfmsg
= nlmsg_data(nlh
);
530 switch(nfmsg
->nfgen_family
) {
541 pr_err("nft_compat: unsupported protocol %d\n",
542 nfmsg
->nfgen_family
);
546 try_then_request_module(xt_find_revision(nfmsg
->nfgen_family
, name
,
553 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
557 /* include the best revision for this extension in the message */
558 if (nfnl_compat_fill_info(skb2
, NETLINK_CB(skb
).portid
,
560 NFNL_MSG_TYPE(nlh
->nlmsg_type
),
563 name
, ret
, target
) <= 0) {
568 ret
= netlink_unicast(nfnl
, skb2
, NETLINK_CB(skb
).portid
,
573 return ret
== -EAGAIN
? -ENOBUFS
: ret
;
576 static const struct nla_policy nfnl_compat_policy_get
[NFTA_COMPAT_MAX
+1] = {
577 [NFTA_COMPAT_NAME
] = { .type
= NLA_NUL_STRING
,
578 .len
= NFT_COMPAT_NAME_MAX
-1 },
579 [NFTA_COMPAT_REV
] = { .type
= NLA_U32
},
580 [NFTA_COMPAT_TYPE
] = { .type
= NLA_U32
},
583 static const struct nfnl_callback nfnl_nft_compat_cb
[NFNL_MSG_COMPAT_MAX
] = {
584 [NFNL_MSG_COMPAT_GET
] = { .call
= nfnl_compat_get
,
585 .attr_count
= NFTA_COMPAT_MAX
,
586 .policy
= nfnl_compat_policy_get
},
589 static const struct nfnetlink_subsystem nfnl_compat_subsys
= {
590 .name
= "nft-compat",
591 .subsys_id
= NFNL_SUBSYS_NFT_COMPAT
,
592 .cb_count
= NFNL_MSG_COMPAT_MAX
,
593 .cb
= nfnl_nft_compat_cb
,
596 static LIST_HEAD(nft_match_list
);
599 struct list_head head
;
600 struct nft_expr_ops ops
;
603 static struct nft_expr_type nft_match_type
;
605 static const struct nft_expr_ops
*
606 nft_match_select_ops(const struct nft_ctx
*ctx
,
607 const struct nlattr
* const tb
[])
609 struct nft_xt
*nft_match
;
610 struct xt_match
*match
;
614 if (tb
[NFTA_MATCH_NAME
] == NULL
||
615 tb
[NFTA_MATCH_REV
] == NULL
||
616 tb
[NFTA_MATCH_INFO
] == NULL
)
617 return ERR_PTR(-EINVAL
);
619 mt_name
= nla_data(tb
[NFTA_MATCH_NAME
]);
620 rev
= ntohl(nla_get_be32(tb
[NFTA_MATCH_REV
]));
621 family
= ctx
->afi
->family
;
623 /* Re-use the existing match if it's already loaded. */
624 list_for_each_entry(nft_match
, &nft_match_list
, head
) {
625 struct xt_match
*match
= nft_match
->ops
.data
;
627 if (strcmp(match
->name
, mt_name
) == 0 &&
628 match
->revision
== rev
&& match
->family
== family
) {
629 if (!try_module_get(match
->me
))
630 return ERR_PTR(-ENOENT
);
632 return &nft_match
->ops
;
636 match
= xt_request_find_match(family
, mt_name
, rev
);
638 return ERR_PTR(-ENOENT
);
640 /* This is the first time we use this match, allocate operations */
641 nft_match
= kzalloc(sizeof(struct nft_xt
), GFP_KERNEL
);
642 if (nft_match
== NULL
)
643 return ERR_PTR(-ENOMEM
);
645 nft_match
->ops
.type
= &nft_match_type
;
646 nft_match
->ops
.size
= NFT_EXPR_SIZE(XT_ALIGN(match
->matchsize
));
647 nft_match
->ops
.eval
= nft_match_eval
;
648 nft_match
->ops
.init
= nft_match_init
;
649 nft_match
->ops
.destroy
= nft_match_destroy
;
650 nft_match
->ops
.dump
= nft_match_dump
;
651 nft_match
->ops
.validate
= nft_match_validate
;
652 nft_match
->ops
.data
= match
;
654 list_add(&nft_match
->head
, &nft_match_list
);
656 return &nft_match
->ops
;
659 static void nft_match_release(void)
661 struct nft_xt
*nft_match
, *tmp
;
663 list_for_each_entry_safe(nft_match
, tmp
, &nft_match_list
, head
)
667 static struct nft_expr_type nft_match_type __read_mostly
= {
669 .select_ops
= nft_match_select_ops
,
670 .policy
= nft_match_policy
,
671 .maxattr
= NFTA_MATCH_MAX
,
672 .owner
= THIS_MODULE
,
675 static LIST_HEAD(nft_target_list
);
677 static struct nft_expr_type nft_target_type
;
679 static const struct nft_expr_ops
*
680 nft_target_select_ops(const struct nft_ctx
*ctx
,
681 const struct nlattr
* const tb
[])
683 struct nft_xt
*nft_target
;
684 struct xt_target
*target
;
688 if (tb
[NFTA_TARGET_NAME
] == NULL
||
689 tb
[NFTA_TARGET_REV
] == NULL
||
690 tb
[NFTA_TARGET_INFO
] == NULL
)
691 return ERR_PTR(-EINVAL
);
693 tg_name
= nla_data(tb
[NFTA_TARGET_NAME
]);
694 rev
= ntohl(nla_get_be32(tb
[NFTA_TARGET_REV
]));
695 family
= ctx
->afi
->family
;
697 /* Re-use the existing target if it's already loaded. */
698 list_for_each_entry(nft_target
, &nft_target_list
, head
) {
699 struct xt_target
*target
= nft_target
->ops
.data
;
701 if (strcmp(target
->name
, tg_name
) == 0 &&
702 target
->revision
== rev
&& target
->family
== family
) {
703 if (!try_module_get(target
->me
))
704 return ERR_PTR(-ENOENT
);
706 return &nft_target
->ops
;
710 target
= xt_request_find_target(family
, tg_name
, rev
);
712 return ERR_PTR(-ENOENT
);
714 /* This is the first time we use this target, allocate operations */
715 nft_target
= kzalloc(sizeof(struct nft_xt
), GFP_KERNEL
);
716 if (nft_target
== NULL
)
717 return ERR_PTR(-ENOMEM
);
719 nft_target
->ops
.type
= &nft_target_type
;
720 nft_target
->ops
.size
= NFT_EXPR_SIZE(XT_ALIGN(target
->targetsize
));
721 nft_target
->ops
.init
= nft_target_init
;
722 nft_target
->ops
.destroy
= nft_target_destroy
;
723 nft_target
->ops
.dump
= nft_target_dump
;
724 nft_target
->ops
.validate
= nft_target_validate
;
725 nft_target
->ops
.data
= target
;
727 if (family
== NFPROTO_BRIDGE
)
728 nft_target
->ops
.eval
= nft_target_eval_bridge
;
730 nft_target
->ops
.eval
= nft_target_eval_xt
;
732 list_add(&nft_target
->head
, &nft_target_list
);
734 return &nft_target
->ops
;
737 static void nft_target_release(void)
739 struct nft_xt
*nft_target
, *tmp
;
741 list_for_each_entry_safe(nft_target
, tmp
, &nft_target_list
, head
)
745 static struct nft_expr_type nft_target_type __read_mostly
= {
747 .select_ops
= nft_target_select_ops
,
748 .policy
= nft_target_policy
,
749 .maxattr
= NFTA_TARGET_MAX
,
750 .owner
= THIS_MODULE
,
753 static int __init
nft_compat_module_init(void)
757 ret
= nft_register_expr(&nft_match_type
);
761 ret
= nft_register_expr(&nft_target_type
);
765 ret
= nfnetlink_subsys_register(&nfnl_compat_subsys
);
767 pr_err("nft_compat: cannot register with nfnetlink.\n");
771 pr_info("nf_tables_compat: (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>\n");
776 nft_unregister_expr(&nft_target_type
);
778 nft_unregister_expr(&nft_match_type
);
782 static void __exit
nft_compat_module_exit(void)
784 nfnetlink_subsys_unregister(&nfnl_compat_subsys
);
785 nft_unregister_expr(&nft_target_type
);
786 nft_unregister_expr(&nft_match_type
);
788 nft_target_release();
791 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFT_COMPAT
);
793 module_init(nft_compat_module_init
);
794 module_exit(nft_compat_module_exit
);
796 MODULE_LICENSE("GPL");
797 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
798 MODULE_ALIAS_NFT_EXPR("match");
799 MODULE_ALIAS_NFT_EXPR("target");