2 * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
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 * Development of this code funded by Astaro AG (http://www.astaro.com/)
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/netlink.h>
14 #include <linux/netfilter.h>
15 #include <linux/netfilter/nf_tables.h>
16 #include <net/netfilter/nf_tables.h>
22 static void nft_template_eval(const struct nft_expr
*expr
,
23 struct nft_data data
[NFT_REG_MAX
+ 1],
24 const struct nft_pktinfo
*pkt
)
26 struct nft_template
*priv
= nft_expr_priv(expr
);
30 static const struct nla_policy nft_template_policy
[NFTA_TEMPLATE_MAX
+ 1] = {
31 [NFTA_TEMPLATE_ATTR
] = { .type
= NLA_U32
},
34 static int nft_template_init(const struct nft_ctx
*ctx
,
35 const struct nft_expr
*expr
,
36 const struct nlattr
* const tb
[])
38 struct nft_template
*priv
= nft_expr_priv(expr
);
43 static void nft_template_destroy(const struct nft_ctx
*ctx
,
44 const struct nft_expr
*expr
)
46 struct nft_template
*priv
= nft_expr_priv(expr
);
50 static int nft_template_dump(struct sk_buff
*skb
, const struct nft_expr
*expr
)
52 const struct nft_template
*priv
= nft_expr_priv(expr
);
54 NLA_PUT_BE32(skb
, NFTA_TEMPLATE_ATTR
, priv
->field
);
61 static struct nft_expr_type nft_template_type
;
62 static const struct nft_expr_ops nft_template_ops
= {
63 .type
= &nft_template_type
,
64 .size
= NFT_EXPR_SIZE(sizeof(struct nft_template
)),
65 .eval
= nft_template_eval
,
66 .init
= nft_template_init
,
67 .destroy
= nft_template_destroy
,
68 .dump
= nft_template_dump
,
71 static struct nft_expr_type nft_template_type __read_mostly
= {
73 .ops
= &nft_template_ops
,
74 .policy
= nft_template_policy
,
75 .maxattr
= NFTA_TEMPLATE_MAX
,
79 static int __init
nft_template_module_init(void)
81 return nft_register_expr(&nft_template_type
);
84 static void __exit
nft_template_module_exit(void)
86 nft_unregister_expr(&nft_template_type
);
89 module_init(nft_template_module_init
);
90 module_exit(nft_template_module_exit
);
92 MODULE_LICENSE("GPL");
93 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
94 MODULE_ALIAS_NFT_EXPR("template");