2 * Copyright (c) 2008 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/list.h>
14 #include <linux/rbtree.h>
15 #include <linux/netlink.h>
16 #include <linux/netfilter.h>
17 #include <linux/netfilter/nf_tables.h>
18 #include <net/netfilter/nf_tables.h>
21 enum nft_meta_keys key
;
24 static void nft_meta_eval(const struct nft_expr
*expr
,
25 struct nft_data
*nfres
,
26 struct nft_data
*data
,
27 const struct nft_pktinfo
*pkt
)
29 const struct nft_meta
*meta
= nft_expr_priv(expr
);
30 struct sk_buff
*skb
= pkt
->skb
;
31 u32 val
= data
->data
[0];
37 case NFT_META_PRIORITY
:
40 case NFT_META_NFTRACE
:
43 #ifdef CONFIG_NETWORK_SECMARK
44 case NFT_META_SECMARK
:
53 static const struct nla_policy nft_meta_policy
[NFTA_META_MAX
+ 1] = {
54 [NFTA_META_KEY
] = { .type
= NLA_U32
},
57 static int nft_meta_init(const struct nft_expr
*expr
, struct nlattr
*tb
[])
59 struct nft_meta
*meta
= nft_expr_priv(expr
);
61 if (tb
[NFTA_META_KEY
] == NULL
)
64 meta
->key
= ntohl(nla_get_be32(tb
[NFTA_META_KEY
]));
67 case NFT_META_PRIORITY
:
68 case NFT_META_NFTRACE
:
69 #ifdef CONFIG_NETWORK_SECMARK
70 case NFT_META_SECMARK
:
80 static int nft_meta_dump(struct sk_buff
*skb
, const struct nft_expr
*expr
)
82 struct nft_meta
*meta
= nft_expr_priv(expr
);
84 NLA_PUT_BE32(skb
, NFTA_META_KEY
, htonl(meta
->key
));
91 static struct nft_expr_ops meta_target __read_mostly
= {
93 .size
= NFT_EXPR_SIZE(sizeof(struct nft_meta
)),
95 .eval
= nft_meta_eval
,
96 .init
= nft_meta_init
,
97 .dump
= nft_meta_dump
,
98 .policy
= nft_meta_policy
,
99 .maxattr
= NFTA_META_MAX
,
102 static int __init
nft_meta_target_init(void)
104 return nft_register_expr(&meta_target
);
107 static void __exit
nft_meta_target_exit(void)
109 nft_unregister_expr(&meta_target
);
112 module_init(nft_meta_target_init
);
113 module_exit(nft_meta_target_exit
);
115 MODULE_LICENSE("GPL");
116 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
117 MODULE_ALIAS_NFT_EXPR("meta");