netfilter: netns ebtables: ebtable_nat in netns (b71b30a6) · Commits · e / devices / android_kernel_oneplus_sm8150

include/net/netns/x_tables.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -10,5 +10,6 @@ struct netns_xt {
		struct list_head tables[NFPROTO_NUMPROTO];
		struct ebt_table *broute_table;
		struct ebt_table *frame_filter;
		struct ebt_table *frame_nat;
		};
		#endif

net/bridge/netfilter/ebtable_nat.c

+32 −15

Original line number	Diff line number	Diff line
		@@ -50,48 +50,47 @@ static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
		return 0;
		}

		static struct ebt_table __frame_nat =
		static struct ebt_table frame_nat =
		{
		.name = "nat",
		.table = &initial_table,
		.valid_hooks = NAT_VALID_HOOKS,
		.lock = __RW_LOCK_UNLOCKED(__frame_nat.lock),
		.lock = __RW_LOCK_UNLOCKED(frame_nat.lock),
		.check = check,
		.me = THIS_MODULE,
		};
		static struct ebt_table *frame_nat;

		static unsigned int
		ebt_nat_dst(unsigned int hook, struct sk_buff skb, const struct net_device in
		ebt_nat_in(unsigned int hook, struct sk_buff skb, const struct net_device in
		, const struct net_device out, int (okfn)(struct sk_buff *))
		{
		return ebt_do_table(hook, skb, in, out, frame_nat);
		return ebt_do_table(hook, skb, in, out, dev_net(in)->xt.frame_nat);
		}

		static unsigned int
		ebt_nat_src(unsigned int hook, struct sk_buff skb, const struct net_device in
		ebt_nat_out(unsigned int hook, struct sk_buff skb, const struct net_device in
		, const struct net_device out, int (okfn)(struct sk_buff *))
		{
		return ebt_do_table(hook, skb, in, out, frame_nat);
		return ebt_do_table(hook, skb, in, out, dev_net(out)->xt.frame_nat);
		}

		static struct nf_hook_ops ebt_ops_nat[] __read_mostly = {
		{
		.hook = ebt_nat_dst,
		.hook = ebt_nat_out,
		.owner = THIS_MODULE,
		.pf = PF_BRIDGE,
		.hooknum = NF_BR_LOCAL_OUT,
		.priority = NF_BR_PRI_NAT_DST_OTHER,
		},
		{
		.hook = ebt_nat_src,
		.hook = ebt_nat_out,
		.owner = THIS_MODULE,
		.pf = PF_BRIDGE,
		.hooknum = NF_BR_POST_ROUTING,
		.priority = NF_BR_PRI_NAT_SRC,
		},
		{
		.hook = ebt_nat_dst,
		.hook = ebt_nat_in,
		.owner = THIS_MODULE,
		.pf = PF_BRIDGE,
		.hooknum = NF_BR_PRE_ROUTING,
		@@ -99,23 +98,41 @@ static struct nf_hook_ops ebt_ops_nat[] __read_mostly = {
		},
		};

		static int __net_init frame_nat_net_init(struct net *net)
		{
		net->xt.frame_nat = ebt_register_table(net, &frame_nat);
		if (IS_ERR(net->xt.frame_nat))
		return PTR_ERR(net->xt.frame_nat);
		return 0;
		}

		static void __net_exit frame_nat_net_exit(struct net *net)
		{
		ebt_unregister_table(net->xt.frame_nat);
		}

		static struct pernet_operations frame_nat_net_ops = {
		.init = frame_nat_net_init,
		.exit = frame_nat_net_exit,
		};

		static int __init ebtable_nat_init(void)
		{
		int ret;

		frame_nat = ebt_register_table(&init_net, &__frame_nat);
		if (IS_ERR(frame_nat))
		return PTR_ERR(frame_nat);
		ret = register_pernet_subsys(&frame_nat_net_ops);
		if (ret < 0)
		return ret;
		ret = nf_register_hooks(ebt_ops_nat, ARRAY_SIZE(ebt_ops_nat));
		if (ret < 0)
		ebt_unregister_table(frame_nat);
		unregister_pernet_subsys(&frame_nat_net_ops);
		return ret;
		}

		static void __exit ebtable_nat_fini(void)
		{
		nf_unregister_hooks(ebt_ops_nat, ARRAY_SIZE(ebt_ops_nat));
		ebt_unregister_table(frame_nat);
		unregister_pernet_subsys(&frame_nat_net_ops);
		}

		module_init(ebtable_nat_init);