2 * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.org>
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_nat.h>
16 #include <net/netfilter/nf_tables.h>
17 #include <net/netfilter/nft_redir.h>
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 },
24 EXPORT_SYMBOL_GPL(nft_redir_policy);
26 int nft_redir_validate(const struct nft_ctx *ctx,
27 const struct nft_expr *expr,
28 const struct nft_data **data)
32 err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT);
36 return nft_chain_validate_hooks(ctx->chain,
37 (1 << NF_INET_PRE_ROUTING) |
38 (1 << NF_INET_LOCAL_OUT));
40 EXPORT_SYMBOL_GPL(nft_redir_validate);
42 int nft_redir_init(const struct nft_ctx *ctx,
43 const struct nft_expr *expr,
44 const struct nlattr * const tb[])
46 struct nft_redir *priv = nft_expr_priv(expr);
50 plen = FIELD_SIZEOF(struct nf_nat_range, min_addr.all);
51 if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
52 err = nft_parse_register_load(tb[NFTA_REDIR_REG_PROTO_MIN],
53 &priv->sreg_proto_min, plen);
57 if (tb[NFTA_REDIR_REG_PROTO_MAX]) {
58 err = nft_parse_register_load(tb[NFTA_REDIR_REG_PROTO_MAX],
59 &priv->sreg_proto_max,
64 priv->sreg_proto_max = priv->sreg_proto_min;
68 if (tb[NFTA_REDIR_FLAGS]) {
69 priv->flags = ntohl(nla_get_be32(tb[NFTA_REDIR_FLAGS]));
70 if (priv->flags & ~NF_NAT_RANGE_MASK)
74 return nf_ct_netns_get(ctx->net, ctx->family);
76 EXPORT_SYMBOL_GPL(nft_redir_init);
78 int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr)
80 const struct nft_redir *priv = nft_expr_priv(expr);
82 if (priv->sreg_proto_min) {
83 if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MIN,
84 priv->sreg_proto_min))
86 if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MAX,
87 priv->sreg_proto_max))
91 if (priv->flags != 0 &&
92 nla_put_be32(skb, NFTA_REDIR_FLAGS, htonl(priv->flags)))
100 EXPORT_SYMBOL_GPL(nft_redir_dump);
102 MODULE_LICENSE("GPL");
103 MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>");