2 * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
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_data data[NFT_REG_MAX + 1],
22 const struct nft_pktinfo *pkt)
24 struct nft_masq *priv = nft_expr_priv(expr);
25 struct nf_nat_range range;
28 range.flags = priv->flags;
30 verdict = nf_nat_masquerade_ipv6(pkt->skb, &range, pkt->out);
32 data[NFT_REG_VERDICT].verdict = verdict;
35 static int nft_masq_ipv6_init(const struct nft_ctx *ctx,
36 const struct nft_expr *expr,
37 const struct nlattr * const tb[])
41 err = nft_masq_init(ctx, expr, tb);
45 nf_nat_masquerade_ipv6_register_notifier();
49 static void nft_masq_ipv6_destroy(const struct nft_ctx *ctx,
50 const struct nft_expr *expr)
52 nf_nat_masquerade_ipv6_unregister_notifier();
55 static struct nft_expr_type nft_masq_ipv6_type;
56 static const struct nft_expr_ops nft_masq_ipv6_ops = {
57 .type = &nft_masq_ipv6_type,
58 .size = NFT_EXPR_SIZE(sizeof(struct nft_masq)),
59 .eval = nft_masq_ipv6_eval,
60 .init = nft_masq_ipv6_init,
61 .destroy = nft_masq_ipv6_destroy,
62 .dump = nft_masq_dump,
65 static struct nft_expr_type nft_masq_ipv6_type __read_mostly = {
66 .family = NFPROTO_IPV6,
68 .ops = &nft_masq_ipv6_ops,
69 .policy = nft_masq_policy,
70 .maxattr = NFTA_MASQ_MAX,
74 static int __init nft_masq_ipv6_module_init(void)
76 return nft_register_expr(&nft_masq_ipv6_type);
79 static void __exit nft_masq_ipv6_module_exit(void)
81 nft_unregister_expr(&nft_masq_ipv6_type);
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.borrero.glez@gmail.com>");
89 MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "masq");