linux/net/bridge/br_nf_core.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *	Handle firewalling core
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<[email protected]>
 *	Bart De Schuymer		<[email protected]>
 *
 *	Lennert dedicates this file to Kerstin Wurdinger.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/in_route.h>
#include <linux/inetdevice.h>
#include <net/route.h>

#include "br_private.h"
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif

static void fake_update_pmtu(struct dst_entry *dst, struct sock *sk,
			     struct sk_buff *skb, u32 mtu,
			     bool confirm_neigh)
{ … }

static void fake_redirect(struct dst_entry *dst, struct sock *sk,
			  struct sk_buff *skb)
{ … }

static u32 *fake_cow_metrics(struct dst_entry *dst, unsigned long old)
{ … }

static struct neighbour *fake_neigh_lookup(const struct dst_entry *dst,
					   struct sk_buff *skb,
					   const void *daddr)
{ … }

static unsigned int fake_mtu(const struct dst_entry *dst)
{ … }

static struct dst_ops fake_dst_ops = …;

/*
 * Initialize bogus route table used to keep netfilter happy.
 * Currently, we fill in the PMTU entry because netfilter
 * refragmentation needs it, and the rt_flags entry because
 * ipt_REJECT needs it.  Future netfilter modules might
 * require us to fill additional fields.
 */
static const u32 br_dst_default_metrics[RTAX_MAX] = …;

void br_netfilter_rtable_init(struct net_bridge *br)
{ … }

int __init br_nf_core_init(void)
{ … }

void br_nf_core_fini(void)
{ … }