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9ba1f726 AB |
1 | /* |
2 | * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> | |
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 | ||
19 | const struct nla_policy nft_masq_policy[NFTA_MASQ_MAX + 1] = { | |
20 | [NFTA_MASQ_FLAGS] = { .type = NLA_U32 }, | |
21 | }; | |
22 | EXPORT_SYMBOL_GPL(nft_masq_policy); | |
23 | ||
24 | int nft_masq_init(const struct nft_ctx *ctx, | |
25 | const struct nft_expr *expr, | |
26 | const struct nlattr * const tb[]) | |
27 | { | |
28 | struct nft_masq *priv = nft_expr_priv(expr); | |
7210e4e3 PNA |
29 | int err; |
30 | ||
31 | err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT); | |
32 | if (err < 0) | |
33 | return err; | |
9ba1f726 AB |
34 | |
35 | if (tb[NFTA_MASQ_FLAGS] == NULL) | |
36 | return 0; | |
37 | ||
38 | priv->flags = ntohl(nla_get_be32(tb[NFTA_MASQ_FLAGS])); | |
39 | if (priv->flags & ~NF_NAT_RANGE_MASK) | |
40 | return -EINVAL; | |
41 | ||
42 | return 0; | |
43 | } | |
44 | EXPORT_SYMBOL_GPL(nft_masq_init); | |
45 | ||
46 | int nft_masq_dump(struct sk_buff *skb, const struct nft_expr *expr) | |
47 | { | |
48 | const struct nft_masq *priv = nft_expr_priv(expr); | |
49 | ||
50 | if (priv->flags == 0) | |
51 | return 0; | |
52 | ||
53 | if (nla_put_be32(skb, NFTA_MASQ_FLAGS, htonl(priv->flags))) | |
54 | goto nla_put_failure; | |
55 | ||
56 | return 0; | |
57 | ||
58 | nla_put_failure: | |
59 | return -1; | |
60 | } | |
61 | EXPORT_SYMBOL_GPL(nft_masq_dump); | |
62 | ||
7210e4e3 PNA |
63 | int nft_masq_validate(const struct nft_ctx *ctx, const struct nft_expr *expr, |
64 | const struct nft_data **data) | |
65 | { | |
66 | return nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT); | |
67 | } | |
68 | EXPORT_SYMBOL_GPL(nft_masq_validate); | |
69 | ||
9ba1f726 AB |
70 | MODULE_LICENSE("GPL"); |
71 | MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>"); |