projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 75e8d06d PNA |
24 | int nft_masq_validate(const struct nft_ctx *ctx, |
| 25 | const struct nft_expr *expr, | |
| 26 | const struct nft_data **data) | |
| 27 | { | |
| 28 | int err; | |
| 29 | ||
| 30 | err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT); | |
| 31 | if (err < 0) | |
| 32 | return err; | |
| 33 | ||
| 34 | return nft_chain_validate_hooks(ctx->chain, | |
| 35 | (1 << NF_INET_POST_ROUTING)); | |
| 36 | } | |
| 37 | EXPORT_SYMBOL_GPL(nft_masq_validate); | |
| 38 | ||
| 9ba1f726 AB |
39 | int nft_masq_init(const struct nft_ctx *ctx, |
| 40 | const struct nft_expr *expr, | |
| 41 | const struct nlattr * const tb[]) | |
| 42 | { | |
| 43 | struct nft_masq *priv = nft_expr_priv(expr); | |
| 7210e4e3 PNA |
44 | int err; |
| 45 | ||
| 75e8d06d PNA |
46 | err = nft_masq_validate(ctx, expr, NULL); |
| 47 | if (err) | |
| 7210e4e3 | 48 | return err; |
| 9ba1f726 AB |
49 | |
| 50 | if (tb[NFTA_MASQ_FLAGS] == NULL) | |
| 51 | return 0; | |
| 52 | ||
| 53 | priv->flags = ntohl(nla_get_be32(tb[NFTA_MASQ_FLAGS])); | |
| 54 | if (priv->flags & ~NF_NAT_RANGE_MASK) | |
| 55 | return -EINVAL; | |
| 56 | ||
| 57 | return 0; | |
| 58 | } | |
| 59 | EXPORT_SYMBOL_GPL(nft_masq_init); | |
| 60 | ||
| 61 | int nft_masq_dump(struct sk_buff *skb, const struct nft_expr *expr) | |
| 62 | { | |
| 63 | const struct nft_masq *priv = nft_expr_priv(expr); | |
| 64 | ||
| 65 | if (priv->flags == 0) | |
| 66 | return 0; | |
| 67 | ||
| 68 | if (nla_put_be32(skb, NFTA_MASQ_FLAGS, htonl(priv->flags))) | |
| 69 | goto nla_put_failure; | |
| 70 | ||
| 71 | return 0; | |
| 72 | ||
| 73 | nla_put_failure: | |
| 74 | return -1; | |
| 75 | } | |
| 76 | EXPORT_SYMBOL_GPL(nft_masq_dump); | |
| 77 | ||
| 78 | MODULE_LICENSE("GPL"); | |
| 79 | MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>"); |