linux/net/netfilter/nf_nat_redirect.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2006 Netfilter Core Team <[email protected]>
 * Copyright (c) 2011 Patrick McHardy <[email protected]>
 *
 * Based on Rusty Russell's IPv4 REDIRECT target. Development of IPv6
 * NAT funded by Astaro.
 */

#include <linux/if.h>
#include <linux/inetdevice.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/netfilter.h>
#include <linux/types.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter/x_tables.h>
#include <net/addrconf.h>
#include <net/checksum.h>
#include <net/protocol.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_redirect.h>

static unsigned int
nf_nat_redirect(struct sk_buff *skb, const struct nf_nat_range2 *range,
		const union nf_inet_addr *newdst)
{ … }

unsigned int
nf_nat_redirect_ipv4(struct sk_buff *skb, const struct nf_nat_range2 *range,
		     unsigned int hooknum)
{ … }
EXPORT_SYMBOL_GPL(…);

static const struct in6_addr loopback_addr = …;

static bool nf_nat_redirect_ipv6_usable(const struct inet6_ifaddr *ifa, unsigned int scope)
{ … }

unsigned int
nf_nat_redirect_ipv6(struct sk_buff *skb, const struct nf_nat_range2 *range,
		     unsigned int hooknum)
{ … }
EXPORT_SYMBOL_GPL(…);