1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/*
* Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nft_masq.h>
#include <net/netfilter/ipv6/nf_nat_masquerade.h>
static void nft_masq_ipv6_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
struct nft_masq *priv = nft_expr_priv(expr);
struct nf_nat_range range;
memset(&range, 0, sizeof(range));
range.flags = priv->flags;
if (priv->sreg_proto_min) {
range.min_proto.all =
*(__be16 *)®s->data[priv->sreg_proto_min];
range.max_proto.all =
*(__be16 *)®s->data[priv->sreg_proto_max];
}
regs->verdict.code = nf_nat_masquerade_ipv6(pkt->skb, &range,
nft_out(pkt));
}
static void
nft_masq_ipv6_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr)
{
nf_ct_netns_put(ctx->net, NFPROTO_IPV6);
}
static struct nft_expr_type nft_masq_ipv6_type;
static const struct nft_expr_ops nft_masq_ipv6_ops = {
.type = &nft_masq_ipv6_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_masq)),
.eval = nft_masq_ipv6_eval,
.init = nft_masq_init,
.destroy = nft_masq_ipv6_destroy,
.dump = nft_masq_dump,
.validate = nft_masq_validate,
};
static struct nft_expr_type nft_masq_ipv6_type __read_mostly = {
.family = NFPROTO_IPV6,
.name = "masq",
.ops = &nft_masq_ipv6_ops,
.policy = nft_masq_policy,
.maxattr = NFTA_MASQ_MAX,
.owner = THIS_MODULE,
};
static int __init nft_masq_ipv6_module_init(void)
{
int ret;
ret = nft_register_expr(&nft_masq_ipv6_type);
if (ret < 0)
return ret;
nf_nat_masquerade_ipv6_register_notifier();
return ret;
}
static void __exit nft_masq_ipv6_module_exit(void)
{
nft_unregister_expr(&nft_masq_ipv6_type);
nf_nat_masquerade_ipv6_unregister_notifier();
}
module_init(nft_masq_ipv6_module_init);
module_exit(nft_masq_ipv6_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>");
MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "masq");
|
