![Pablo Neira Ayuso](/assets/img/avatar_default.png)
Remove the infrastructure to register/unregister nft_af_info structure, this structure stores no useful information anymore. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 2015 Pablo Neira Ayuso <pablo@netfilter.org>
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/netdevice.h>
|
|
#include <net/netfilter/nf_tables.h>
|
|
#include <linux/ip.h>
|
|
#include <linux/ipv6.h>
|
|
#include <net/netfilter/nf_tables_ipv4.h>
|
|
#include <net/netfilter/nf_tables_ipv6.h>
|
|
|
|
static unsigned int
|
|
nft_do_chain_netdev(void *priv, struct sk_buff *skb,
|
|
const struct nf_hook_state *state)
|
|
{
|
|
struct nft_pktinfo pkt;
|
|
|
|
nft_set_pktinfo(&pkt, skb, state);
|
|
|
|
switch (skb->protocol) {
|
|
case htons(ETH_P_IP):
|
|
nft_set_pktinfo_ipv4_validate(&pkt, skb);
|
|
break;
|
|
case htons(ETH_P_IPV6):
|
|
nft_set_pktinfo_ipv6_validate(&pkt, skb);
|
|
break;
|
|
default:
|
|
nft_set_pktinfo_unspec(&pkt, skb);
|
|
break;
|
|
}
|
|
|
|
return nft_do_chain(&pkt, priv);
|
|
}
|
|
|
|
static const struct nf_chain_type nft_filter_chain_netdev = {
|
|
.name = "filter",
|
|
.type = NFT_CHAIN_T_DEFAULT,
|
|
.family = NFPROTO_NETDEV,
|
|
.owner = THIS_MODULE,
|
|
.hook_mask = (1 << NF_NETDEV_INGRESS),
|
|
.hooks = {
|
|
[NF_NETDEV_INGRESS] = nft_do_chain_netdev,
|
|
},
|
|
};
|
|
|
|
static void nft_netdev_event(unsigned long event, struct net_device *dev,
|
|
struct nft_ctx *ctx)
|
|
{
|
|
struct nft_base_chain *basechain = nft_base_chain(ctx->chain);
|
|
|
|
switch (event) {
|
|
case NETDEV_UNREGISTER:
|
|
if (strcmp(basechain->dev_name, dev->name) != 0)
|
|
return;
|
|
|
|
__nft_release_basechain(ctx);
|
|
break;
|
|
case NETDEV_CHANGENAME:
|
|
if (dev->ifindex != basechain->ops.dev->ifindex)
|
|
return;
|
|
|
|
strncpy(basechain->dev_name, dev->name, IFNAMSIZ);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int nf_tables_netdev_event(struct notifier_block *this,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct nft_table *table;
|
|
struct nft_chain *chain, *nr;
|
|
struct nft_ctx ctx = {
|
|
.net = dev_net(dev),
|
|
};
|
|
|
|
if (event != NETDEV_UNREGISTER &&
|
|
event != NETDEV_CHANGENAME)
|
|
return NOTIFY_DONE;
|
|
|
|
nfnl_lock(NFNL_SUBSYS_NFTABLES);
|
|
list_for_each_entry(table, &ctx.net->nft.tables, list) {
|
|
if (table->family != NFPROTO_NETDEV)
|
|
continue;
|
|
|
|
ctx.family = table->family;
|
|
ctx.table = table;
|
|
list_for_each_entry_safe(chain, nr, &table->chains, list) {
|
|
if (!nft_is_base_chain(chain))
|
|
continue;
|
|
|
|
ctx.chain = chain;
|
|
nft_netdev_event(event, dev, &ctx);
|
|
}
|
|
}
|
|
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block nf_tables_netdev_notifier = {
|
|
.notifier_call = nf_tables_netdev_event,
|
|
};
|
|
|
|
static int __init nf_tables_netdev_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = nft_register_chain_type(&nft_filter_chain_netdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = register_netdevice_notifier(&nf_tables_netdev_notifier);
|
|
if (ret)
|
|
goto err_register_netdevice_notifier;
|
|
|
|
return 0;
|
|
|
|
err_register_netdevice_notifier:
|
|
nft_unregister_chain_type(&nft_filter_chain_netdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit nf_tables_netdev_exit(void)
|
|
{
|
|
unregister_netdevice_notifier(&nf_tables_netdev_notifier);
|
|
nft_unregister_chain_type(&nft_filter_chain_netdev);
|
|
}
|
|
|
|
module_init(nf_tables_netdev_init);
|
|
module_exit(nf_tables_netdev_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
|
|
MODULE_ALIAS_NFT_CHAIN(5, "filter"); /* NFPROTO_NETDEV */
|