2 * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.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.
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/nf_nat.h>
17 #include <net/netfilter/nft_masq.h>
18 #include <net/netfilter/ipv6/nf_nat_masquerade.h>
20 static void nft_masq_ipv6_eval(const struct nft_expr
*expr
,
21 struct nft_regs
*regs
,
22 const struct nft_pktinfo
*pkt
)
24 struct nft_masq
*priv
= nft_expr_priv(expr
);
25 struct nf_nat_range range
;
27 memset(&range
, 0, sizeof(range
));
28 range
.flags
= priv
->flags
;
29 if (priv
->sreg_proto_min
) {
31 *(__be16
*)®s
->data
[priv
->sreg_proto_min
];
33 *(__be16
*)®s
->data
[priv
->sreg_proto_max
];
35 regs
->verdict
.code
= nf_nat_masquerade_ipv6(pkt
->skb
, &range
,
40 nft_masq_ipv6_destroy(const struct nft_ctx
*ctx
, const struct nft_expr
*expr
)
42 nf_ct_netns_put(ctx
->net
, NFPROTO_IPV6
);
45 static struct nft_expr_type nft_masq_ipv6_type
;
46 static const struct nft_expr_ops nft_masq_ipv6_ops
= {
47 .type
= &nft_masq_ipv6_type
,
48 .size
= NFT_EXPR_SIZE(sizeof(struct nft_masq
)),
49 .eval
= nft_masq_ipv6_eval
,
50 .init
= nft_masq_init
,
51 .destroy
= nft_masq_ipv6_destroy
,
52 .dump
= nft_masq_dump
,
53 .validate
= nft_masq_validate
,
56 static struct nft_expr_type nft_masq_ipv6_type __read_mostly
= {
57 .family
= NFPROTO_IPV6
,
59 .ops
= &nft_masq_ipv6_ops
,
60 .policy
= nft_masq_policy
,
61 .maxattr
= NFTA_MASQ_MAX
,
65 static int __init
nft_masq_ipv6_module_init(void)
69 ret
= nft_register_expr(&nft_masq_ipv6_type
);
73 nf_nat_masquerade_ipv6_register_notifier();
78 static void __exit
nft_masq_ipv6_module_exit(void)
80 nft_unregister_expr(&nft_masq_ipv6_type
);
81 nf_nat_masquerade_ipv6_unregister_notifier();
84 module_init(nft_masq_ipv6_module_init
);
85 module_exit(nft_masq_ipv6_module_exit
);
87 MODULE_LICENSE("GPL");
88 MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>");
89 MODULE_ALIAS_NFT_AF_EXPR(AF_INET6
, "masq");