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9ba1f726 | 1 | /* |
cd727514 | 2 | * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.org> |
9ba1f726 AB |
3 | * |
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. | |
7 | */ | |
8 | ||
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> | |
19 | ||
20 | static void nft_masq_ipv6_eval(const struct nft_expr *expr, | |
a55e22e9 | 21 | struct nft_regs *regs, |
9ba1f726 AB |
22 | const struct nft_pktinfo *pkt) |
23 | { | |
24 | struct nft_masq *priv = nft_expr_priv(expr); | |
25 | struct nf_nat_range range; | |
9ba1f726 | 26 | |
6b96686e | 27 | memset(&range, 0, sizeof(range)); |
9ba1f726 | 28 | range.flags = priv->flags; |
8a6bf5da PNA |
29 | if (priv->sreg_proto_min) { |
30 | range.min_proto.all = | |
31 | *(__be16 *)®s->data[priv->sreg_proto_min]; | |
32 | range.max_proto.all = | |
33 | *(__be16 *)®s->data[priv->sreg_proto_max]; | |
34 | } | |
0e5a1c7e PNA |
35 | regs->verdict.code = nf_nat_masquerade_ipv6(pkt->skb, &range, |
36 | nft_out(pkt)); | |
9ba1f726 AB |
37 | } |
38 | ||
20afd423 FW |
39 | static void |
40 | nft_masq_ipv6_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) | |
41 | { | |
42 | nf_ct_netns_put(ctx->net, NFPROTO_IPV6); | |
43 | } | |
44 | ||
9ba1f726 AB |
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, | |
8da4cc1b | 50 | .init = nft_masq_init, |
20afd423 | 51 | .destroy = nft_masq_ipv6_destroy, |
9ba1f726 | 52 | .dump = nft_masq_dump, |
7210e4e3 | 53 | .validate = nft_masq_validate, |
9ba1f726 AB |
54 | }; |
55 | ||
56 | static struct nft_expr_type nft_masq_ipv6_type __read_mostly = { | |
57 | .family = NFPROTO_IPV6, | |
58 | .name = "masq", | |
59 | .ops = &nft_masq_ipv6_ops, | |
60 | .policy = nft_masq_policy, | |
61 | .maxattr = NFTA_MASQ_MAX, | |
62 | .owner = THIS_MODULE, | |
63 | }; | |
64 | ||
65 | static int __init nft_masq_ipv6_module_init(void) | |
66 | { | |
8da4cc1b AB |
67 | int ret; |
68 | ||
69 | ret = nft_register_expr(&nft_masq_ipv6_type); | |
70 | if (ret < 0) | |
71 | return ret; | |
72 | ||
73 | nf_nat_masquerade_ipv6_register_notifier(); | |
74 | ||
75 | return ret; | |
9ba1f726 AB |
76 | } |
77 | ||
78 | static void __exit nft_masq_ipv6_module_exit(void) | |
79 | { | |
80 | nft_unregister_expr(&nft_masq_ipv6_type); | |
8da4cc1b | 81 | nf_nat_masquerade_ipv6_unregister_notifier(); |
9ba1f726 AB |
82 | } |
83 | ||
84 | module_init(nft_masq_ipv6_module_init); | |
85 | module_exit(nft_masq_ipv6_module_exit); | |
86 | ||
87 | MODULE_LICENSE("GPL"); | |
cd727514 | 88 | MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>"); |
9ba1f726 | 89 | MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "masq"); |