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/nft_masq.h>
17 #include <net/netfilter/ipv4/nf_nat_masquerade.h>
19 static void nft_masq_ipv4_eval(const struct nft_expr *expr,
20 struct nft_data data[NFT_REG_MAX + 1],
21 const struct nft_pktinfo *pkt)
23 struct nft_masq *priv = nft_expr_priv(expr);
24 struct nf_nat_range range;
27 range.flags = priv->flags;
29 verdict = nf_nat_masquerade_ipv4(pkt->skb, pkt->ops->hooknum,
32 data[NFT_REG_VERDICT].verdict = verdict;
35 static struct nft_expr_type nft_masq_ipv4_type;
36 static const struct nft_expr_ops nft_masq_ipv4_ops = {
37 .type = &nft_masq_ipv4_type,
38 .size = NFT_EXPR_SIZE(sizeof(struct nft_masq)),
39 .eval = nft_masq_ipv4_eval,
40 .init = nft_masq_init,
41 .dump = nft_masq_dump,
42 .validate = nft_masq_validate,
45 static struct nft_expr_type nft_masq_ipv4_type __read_mostly = {
46 .family = NFPROTO_IPV4,
48 .ops = &nft_masq_ipv4_ops,
49 .policy = nft_masq_policy,
50 .maxattr = NFTA_MASQ_MAX,
54 static int __init nft_masq_ipv4_module_init(void)
58 ret = nft_register_expr(&nft_masq_ipv4_type);
62 nf_nat_masquerade_ipv4_register_notifier();
67 static void __exit nft_masq_ipv4_module_exit(void)
69 nft_unregister_expr(&nft_masq_ipv4_type);
70 nf_nat_masquerade_ipv4_unregister_notifier();
73 module_init(nft_masq_ipv4_module_init);
74 module_exit(nft_masq_ipv4_module_exit);
76 MODULE_LICENSE("GPL");
77 MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>");
78 MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "masq");