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_redir.h>
18 #include <net/netfilter/nf_nat_redirect.h>
20 static void nft_redir_ipv6_eval(const struct nft_expr *expr,
21 struct nft_regs *regs,
22 const struct nft_pktinfo *pkt)
24 struct nft_redir *priv = nft_expr_priv(expr);
25 struct nf_nat_range range;
27 memset(&range, 0, sizeof(range));
28 if (priv->sreg_proto_min) {
29 range.min_proto.all = (__force __be16)nft_reg_load16(
30 ®s->data[priv->sreg_proto_min]);
31 range.max_proto.all = (__force __be16)nft_reg_load16(
32 ®s->data[priv->sreg_proto_max]);
33 range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
36 range.flags |= priv->flags;
39 nf_nat_redirect_ipv6(pkt->skb, &range, nft_hook(pkt));
43 nft_redir_ipv6_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr)
45 nf_ct_netns_put(ctx->net, NFPROTO_IPV6);
48 static struct nft_expr_type nft_redir_ipv6_type;
49 static const struct nft_expr_ops nft_redir_ipv6_ops = {
50 .type = &nft_redir_ipv6_type,
51 .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)),
52 .eval = nft_redir_ipv6_eval,
53 .init = nft_redir_init,
54 .destroy = nft_redir_ipv6_destroy,
55 .dump = nft_redir_dump,
56 .validate = nft_redir_validate,
59 static struct nft_expr_type nft_redir_ipv6_type __read_mostly = {
60 .family = NFPROTO_IPV6,
62 .ops = &nft_redir_ipv6_ops,
63 .policy = nft_redir_policy,
64 .maxattr = NFTA_REDIR_MAX,
68 static int __init nft_redir_ipv6_module_init(void)
70 return nft_register_expr(&nft_redir_ipv6_type);
73 static void __exit nft_redir_ipv6_module_exit(void)
75 nft_unregister_expr(&nft_redir_ipv6_type);
78 module_init(nft_redir_ipv6_module_init);
79 module_exit(nft_redir_ipv6_module_exit);
81 MODULE_LICENSE("GPL");
82 MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>");
83 MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "redir");