linux/net/netfilter/xt_addrtype.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  iptables module to match inet_addr_type() of an ip.
 *
 *  Copyright (c) 2004 Patrick McHardy <[email protected]>
 *  (C) 2007 Laszlo Attila Toth <[email protected]>
 */
#define pr_fmt(fmt) …
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ip.h>
#include <net/route.h>

#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <net/ip6_fib.h>
#endif

#include <linux/netfilter_ipv6.h>
#include <linux/netfilter/xt_addrtype.h>
#include <linux/netfilter/x_tables.h>

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_ALIAS(…) …;
MODULE_ALIAS(…) …;

#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
static u32 match_lookup_rt6(struct net *net, const struct net_device *dev,
			    const struct in6_addr *addr, u16 mask)
{ … }

static bool match_type6(struct net *net, const struct net_device *dev,
				const struct in6_addr *addr, u16 mask)
{ … }

static bool
addrtype_mt6(struct net *net, const struct net_device *dev,
	const struct sk_buff *skb, const struct xt_addrtype_info_v1 *info)
{ … }
#endif

static inline bool match_type(struct net *net, const struct net_device *dev,
			      __be32 addr, u_int16_t mask)
{ … }

static bool
addrtype_mt_v0(const struct sk_buff *skb, struct xt_action_param *par)
{ … }

static bool
addrtype_mt_v1(const struct sk_buff *skb, struct xt_action_param *par)
{ … }

static int addrtype_mt_checkentry_v1(const struct xt_mtchk_param *par)
{ … }

static struct xt_match addrtype_mt_reg[] __read_mostly = …;

static int __init addrtype_mt_init(void)
{ … }

static void __exit addrtype_mt_exit(void)
{ … }

module_init(…) …;
module_exit(addrtype_mt_exit);