mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 18:09:57 +00:00
db8ab38880
Merge the ipv4 and ipv6 nat chain type. This is the last missing piece which allows to provide inet family support for nat in a follow patch. The kconfig knobs for ipv4/ipv6 nat chain are removed, the nat chain type will be built unconditionally if NFT_NAT expression is enabled. Before: text data bss dec hex filename 1576 896 0 2472 9a8 nft_chain_nat_ipv4.ko 1697 896 0 2593 a21 nft_chain_nat_ipv6.ko After: text data bss dec hex filename 1832 896 0 2728 aa8 nft_chain_nat.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/netfilter/nf_tables.h>
|
|
#include <net/netfilter/nf_nat.h>
|
|
#include <net/netfilter/nf_tables.h>
|
|
#include <net/netfilter/nf_tables_ipv4.h>
|
|
#include <net/netfilter/nf_tables_ipv6.h>
|
|
|
|
static unsigned int nft_nat_do_chain(void *priv, struct sk_buff *skb,
|
|
const struct nf_hook_state *state)
|
|
{
|
|
struct nft_pktinfo pkt;
|
|
|
|
nft_set_pktinfo(&pkt, skb, state);
|
|
|
|
switch (state->pf) {
|
|
#ifdef CONFIG_NF_TABLES_IPV4
|
|
case NFPROTO_IPV4:
|
|
nft_set_pktinfo_ipv4(&pkt, skb);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_NF_TABLES_IPV6
|
|
case NFPROTO_IPV6:
|
|
nft_set_pktinfo_ipv6(&pkt, skb);
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return nft_do_chain(&pkt, priv);
|
|
}
|
|
|
|
#ifdef CONFIG_NF_TABLES_IPV4
|
|
static const struct nft_chain_type nft_chain_nat_ipv4 = {
|
|
.name = "nat",
|
|
.type = NFT_CHAIN_T_NAT,
|
|
.family = NFPROTO_IPV4,
|
|
.owner = THIS_MODULE,
|
|
.hook_mask = (1 << NF_INET_PRE_ROUTING) |
|
|
(1 << NF_INET_POST_ROUTING) |
|
|
(1 << NF_INET_LOCAL_OUT) |
|
|
(1 << NF_INET_LOCAL_IN),
|
|
.hooks = {
|
|
[NF_INET_PRE_ROUTING] = nft_nat_do_chain,
|
|
[NF_INET_POST_ROUTING] = nft_nat_do_chain,
|
|
[NF_INET_LOCAL_OUT] = nft_nat_do_chain,
|
|
[NF_INET_LOCAL_IN] = nft_nat_do_chain,
|
|
},
|
|
.ops_register = nf_nat_ipv4_register_fn,
|
|
.ops_unregister = nf_nat_ipv4_unregister_fn,
|
|
};
|
|
#endif
|
|
|
|
#ifdef CONFIG_NF_TABLES_IPV6
|
|
static const struct nft_chain_type nft_chain_nat_ipv6 = {
|
|
.name = "nat",
|
|
.type = NFT_CHAIN_T_NAT,
|
|
.family = NFPROTO_IPV6,
|
|
.owner = THIS_MODULE,
|
|
.hook_mask = (1 << NF_INET_PRE_ROUTING) |
|
|
(1 << NF_INET_POST_ROUTING) |
|
|
(1 << NF_INET_LOCAL_OUT) |
|
|
(1 << NF_INET_LOCAL_IN),
|
|
.hooks = {
|
|
[NF_INET_PRE_ROUTING] = nft_nat_do_chain,
|
|
[NF_INET_POST_ROUTING] = nft_nat_do_chain,
|
|
[NF_INET_LOCAL_OUT] = nft_nat_do_chain,
|
|
[NF_INET_LOCAL_IN] = nft_nat_do_chain,
|
|
},
|
|
.ops_register = nf_nat_ipv6_register_fn,
|
|
.ops_unregister = nf_nat_ipv6_unregister_fn,
|
|
};
|
|
#endif
|
|
|
|
static int __init nft_chain_nat_init(void)
|
|
{
|
|
#ifdef CONFIG_NF_TABLES_IPV6
|
|
nft_register_chain_type(&nft_chain_nat_ipv6);
|
|
#endif
|
|
#ifdef CONFIG_NF_TABLES_IPV4
|
|
nft_register_chain_type(&nft_chain_nat_ipv4);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit nft_chain_nat_exit(void)
|
|
{
|
|
#ifdef CONFIG_NF_TABLES_IPV4
|
|
nft_unregister_chain_type(&nft_chain_nat_ipv4);
|
|
#endif
|
|
#ifdef CONFIG_NF_TABLES_IPV6
|
|
nft_unregister_chain_type(&nft_chain_nat_ipv6);
|
|
#endif
|
|
}
|
|
|
|
module_init(nft_chain_nat_init);
|
|
module_exit(nft_chain_nat_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
#ifdef CONFIG_NF_TABLES_IPV4
|
|
MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat");
|
|
#endif
|
|
#ifdef CONFIG_NF_TABLES_IPV6
|
|
MODULE_ALIAS_NFT_CHAIN(AF_INET6, "nat");
|
|
#endif
|