Commit 05513e9e authored by Patrick McHardy's avatar Patrick McHardy Committed by Pablo Neira Ayuso

netfilter: nf_tables: add reject module for NFPROTO_INET

Add a reject module for NFPROTO_INET. It does nothing but dispatch
to the AF-specific modules based on the hook family.
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent cc4723ca
......@@ -14,4 +14,12 @@ int nft_reject_init(const struct nft_ctx *ctx,
int nft_reject_dump(struct sk_buff *skb, const struct nft_expr *expr);
void nft_reject_ipv4_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt);
void nft_reject_ipv6_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt);
#endif
......@@ -20,9 +20,9 @@
#include <net/netfilter/ipv4/nf_reject.h>
#include <net/netfilter/nft_reject.h>
static void nft_reject_ipv4_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
void nft_reject_ipv4_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
{
struct nft_reject *priv = nft_expr_priv(expr);
......@@ -37,6 +37,7 @@ static void nft_reject_ipv4_eval(const struct nft_expr *expr,
data[NFT_REG_VERDICT].verdict = NF_DROP;
}
EXPORT_SYMBOL_GPL(nft_reject_ipv4_eval);
static struct nft_expr_type nft_reject_ipv4_type;
static const struct nft_expr_ops nft_reject_ipv4_ops = {
......
......@@ -19,9 +19,9 @@
#include <net/netfilter/nft_reject.h>
#include <net/netfilter/ipv6/nf_reject.h>
static void nft_reject_ipv6_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
void nft_reject_ipv6_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
{
struct nft_reject *priv = nft_expr_priv(expr);
struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
......@@ -38,6 +38,7 @@ static void nft_reject_ipv6_eval(const struct nft_expr *expr,
data[NFT_REG_VERDICT].verdict = NF_DROP;
}
EXPORT_SYMBOL_GPL(nft_reject_ipv6_eval);
static struct nft_expr_type nft_reject_ipv6_type;
static const struct nft_expr_ops nft_reject_ipv6_ops = {
......
......@@ -520,6 +520,11 @@ config NFT_REJECT
explicitly deny and notify via TCP reset/ICMP informational errors
unallowed traffic.
config NFT_REJECT_INET
depends on NF_TABLES_INET
default NFT_REJECT
tristate
config NFT_COMPAT
depends on NF_TABLES
depends on NETFILTER_XTABLES
......
......@@ -79,6 +79,7 @@ obj-$(CONFIG_NFT_LIMIT) += nft_limit.o
obj-$(CONFIG_NFT_NAT) += nft_nat.o
obj-$(CONFIG_NFT_QUEUE) += nft_queue.o
obj-$(CONFIG_NFT_REJECT) += nft_reject.o
obj-$(CONFIG_NFT_REJECT_INET) += nft_reject_inet.o
obj-$(CONFIG_NFT_RBTREE) += nft_rbtree.o
obj-$(CONFIG_NFT_HASH) += nft_hash.o
obj-$(CONFIG_NFT_COUNTER) += nft_counter.o
......
/*
* Copyright (c) 2014 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nft_reject.h>
static void nft_reject_inet_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
{
switch (pkt->ops->pf) {
case NFPROTO_IPV4:
nft_reject_ipv4_eval(expr, data, pkt);
case NFPROTO_IPV6:
nft_reject_ipv6_eval(expr, data, pkt);
}
}
static struct nft_expr_type nft_reject_inet_type;
static const struct nft_expr_ops nft_reject_inet_ops = {
.type = &nft_reject_inet_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
.eval = nft_reject_inet_eval,
.init = nft_reject_init,
.dump = nft_reject_dump,
};
static struct nft_expr_type nft_reject_inet_type __read_mostly = {
.family = NFPROTO_INET,
.name = "reject",
.ops = &nft_reject_inet_ops,
.policy = nft_reject_policy,
.maxattr = NFTA_REJECT_MAX,
.owner = THIS_MODULE,
};
static int __init nft_reject_inet_module_init(void)
{
return nft_register_expr(&nft_reject_inet_type);
}
static void __exit nft_reject_inet_module_exit(void)
{
nft_unregister_expr(&nft_reject_inet_type);
}
module_init(nft_reject_inet_module_init);
module_exit(nft_reject_inet_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_ALIAS_NFT_AF_EXPR(1, "reject");
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