projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e9105f1b 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_nat.h> | |
| 16 | #include <net/netfilter/nf_tables.h> | |
| 17 | #include <net/netfilter/nft_redir.h> | |
| 18 | ||
| 19 | const struct nla_policy nft_redir_policy[NFTA_REDIR_MAX + 1] = { | |
| 20 | [NFTA_REDIR_REG_PROTO_MIN] = { .type = NLA_U32 }, | |
| 21 | [NFTA_REDIR_REG_PROTO_MAX] = { .type = NLA_U32 }, | |
| 22 | [NFTA_REDIR_FLAGS] = { .type = NLA_U32 }, | |
| 23 | }; | |
| 24 | EXPORT_SYMBOL_GPL(nft_redir_policy); | |
| 25 | ||
| 75e8d06d PNA |
26 | int nft_redir_validate(const struct nft_ctx *ctx, |
| 27 | const struct nft_expr *expr, | |
| 28 | const struct nft_data **data) | |
| 29 | { | |
| 30 | int err; | |
| 31 | ||
| 32 | err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT); | |
| 33 | if (err < 0) | |
| 34 | return err; | |
| 35 | ||
| 36 | return nft_chain_validate_hooks(ctx->chain, | |
| 37 | (1 << NF_INET_PRE_ROUTING) | | |
| 38 | (1 << NF_INET_LOCAL_OUT)); | |
| 39 | } | |
| 40 | EXPORT_SYMBOL_GPL(nft_redir_validate); | |
| 41 | ||
| e9105f1b AB |
42 | int nft_redir_init(const struct nft_ctx *ctx, |
| 43 | const struct nft_expr *expr, | |
| 44 | const struct nlattr * const tb[]) | |
| 45 | { | |
| 46 | struct nft_redir *priv = nft_expr_priv(expr); | |
| e9105f1b AB |
47 | int err; |
| 48 | ||
| 75e8d06d | 49 | err = nft_redir_validate(ctx, expr, NULL); |
| e9105f1b AB |
50 | if (err < 0) |
| 51 | return err; | |
| 52 | ||
| 53 | if (tb[NFTA_REDIR_REG_PROTO_MIN]) { | |
| baf4750d PNA |
54 | priv->sreg_proto_min = |
| 55 | ntohl(nla_get_be32(tb[NFTA_REDIR_REG_PROTO_MIN])); | |
| 56 | ||
| e9105f1b AB |
57 | err = nft_validate_input_register(priv->sreg_proto_min); |
| 58 | if (err < 0) | |
| 59 | return err; | |
| 60 | ||
| 61 | if (tb[NFTA_REDIR_REG_PROTO_MAX]) { | |
| baf4750d PNA |
62 | priv->sreg_proto_max = |
| 63 | ntohl(nla_get_be32(tb[NFTA_REDIR_REG_PROTO_MAX])); | |
| 64 | ||
| e9105f1b AB |
65 | err = nft_validate_input_register(priv->sreg_proto_max); |
| 66 | if (err < 0) | |
| 67 | return err; | |
| 68 | } else { | |
| 69 | priv->sreg_proto_max = priv->sreg_proto_min; | |
| 70 | } | |
| 71 | } | |
| 72 | ||
| 73 | if (tb[NFTA_REDIR_FLAGS]) { | |
| 74 | priv->flags = ntohl(nla_get_be32(tb[NFTA_REDIR_FLAGS])); | |
| 75 | if (priv->flags & ~NF_NAT_RANGE_MASK) | |
| 76 | return -EINVAL; | |
| 77 | } | |
| 78 | ||
| 79 | return 0; | |
| 80 | } | |
| 81 | EXPORT_SYMBOL_GPL(nft_redir_init); | |
| 82 | ||
| 83 | int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr) | |
| 84 | { | |
| 85 | const struct nft_redir *priv = nft_expr_priv(expr); | |
| 86 | ||
| 87 | if (priv->sreg_proto_min) { | |
| 88 | if (nla_put_be32(skb, NFTA_REDIR_REG_PROTO_MIN, | |
| 89 | htonl(priv->sreg_proto_min))) | |
| 90 | goto nla_put_failure; | |
| 91 | if (nla_put_be32(skb, NFTA_REDIR_REG_PROTO_MAX, | |
| 92 | htonl(priv->sreg_proto_max))) | |
| 93 | goto nla_put_failure; | |
| 94 | } | |
| 95 | ||
| 96 | if (priv->flags != 0 && | |
| 97 | nla_put_be32(skb, NFTA_REDIR_FLAGS, htonl(priv->flags))) | |
| 98 | goto nla_put_failure; | |
| 99 | ||
| 100 | return 0; | |
| 101 | ||
| 102 | nla_put_failure: | |
| 103 | return -1; | |
| 104 | } | |
| 105 | EXPORT_SYMBOL_GPL(nft_redir_dump); | |
| 106 | ||
| e9105f1b AB |
107 | MODULE_LICENSE("GPL"); |
| 108 | MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>"); |