2 * Copyright (c) 2015 Pablo Neira Ayuso <pablo@netfilter.org>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/module.h>
12 #include <linux/netlink.h>
13 #include <linux/netfilter.h>
14 #include <linux/netfilter/nf_tables.h>
15 #include <net/netfilter/nf_tables.h>
16 #include <net/netfilter/ipv6/nf_dup_ipv6.h>
19 enum nft_registers sreg_addr
:8;
20 enum nft_registers sreg_dev
:8;
23 static void nft_dup_ipv6_eval(const struct nft_expr
*expr
,
24 struct nft_regs
*regs
,
25 const struct nft_pktinfo
*pkt
)
27 struct nft_dup_ipv6
*priv
= nft_expr_priv(expr
);
28 struct in6_addr
*gw
= (struct in6_addr
*)®s
->data
[priv
->sreg_addr
];
29 int oif
= regs
->data
[priv
->sreg_dev
];
31 nf_dup_ipv6(nft_net(pkt
), pkt
->skb
, nft_hook(pkt
), gw
, oif
);
34 static int nft_dup_ipv6_init(const struct nft_ctx
*ctx
,
35 const struct nft_expr
*expr
,
36 const struct nlattr
* const tb
[])
38 struct nft_dup_ipv6
*priv
= nft_expr_priv(expr
);
41 if (tb
[NFTA_DUP_SREG_ADDR
] == NULL
)
44 priv
->sreg_addr
= nft_parse_register(tb
[NFTA_DUP_SREG_ADDR
]);
45 err
= nft_validate_register_load(priv
->sreg_addr
, sizeof(struct in6_addr
));
49 if (tb
[NFTA_DUP_SREG_DEV
] != NULL
) {
50 priv
->sreg_dev
= nft_parse_register(tb
[NFTA_DUP_SREG_DEV
]);
51 return nft_validate_register_load(priv
->sreg_dev
, sizeof(int));
56 static int nft_dup_ipv6_dump(struct sk_buff
*skb
, const struct nft_expr
*expr
)
58 struct nft_dup_ipv6
*priv
= nft_expr_priv(expr
);
60 if (nft_dump_register(skb
, NFTA_DUP_SREG_ADDR
, priv
->sreg_addr
) ||
61 nft_dump_register(skb
, NFTA_DUP_SREG_DEV
, priv
->sreg_dev
))
70 static struct nft_expr_type nft_dup_ipv6_type
;
71 static const struct nft_expr_ops nft_dup_ipv6_ops
= {
72 .type
= &nft_dup_ipv6_type
,
73 .size
= NFT_EXPR_SIZE(sizeof(struct nft_dup_ipv6
)),
74 .eval
= nft_dup_ipv6_eval
,
75 .init
= nft_dup_ipv6_init
,
76 .dump
= nft_dup_ipv6_dump
,
79 static const struct nla_policy nft_dup_ipv6_policy
[NFTA_DUP_MAX
+ 1] = {
80 [NFTA_DUP_SREG_ADDR
] = { .type
= NLA_U32
},
81 [NFTA_DUP_SREG_DEV
] = { .type
= NLA_U32
},
84 static struct nft_expr_type nft_dup_ipv6_type __read_mostly
= {
85 .family
= NFPROTO_IPV6
,
87 .ops
= &nft_dup_ipv6_ops
,
88 .policy
= nft_dup_ipv6_policy
,
89 .maxattr
= NFTA_DUP_MAX
,
93 static int __init
nft_dup_ipv6_module_init(void)
95 return nft_register_expr(&nft_dup_ipv6_type
);
98 static void __exit
nft_dup_ipv6_module_exit(void)
100 nft_unregister_expr(&nft_dup_ipv6_type
);
103 module_init(nft_dup_ipv6_module_init
);
104 module_exit(nft_dup_ipv6_module_exit
);
106 MODULE_LICENSE("GPL");
107 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
108 MODULE_ALIAS_NFT_AF_EXPR(AF_INET6
, "dup");