mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-25 03:55:09 +08:00
938f2e0b57
The addition of routable multicast TX handling introduced a
bug/regression for packets with a link-local multicast destination:
These packets would be sent to all batman-adv nodes with a multicast
router and to all batman-adv nodes with an old version without multicast
router detection.
This even disregards the batman-adv multicast fanout setting, which can
potentially lead to an unwanted, high number of unicast transmissions or
even congestion.
Fixing this by avoiding to send link-local multicast packets to nodes in
the multicast router list.
Fixes: 11d458c1cb ("batman-adv: mcast: apply optimizations for routable packets, too")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* Copyright (C) B.A.T.M.A.N. contributors:
|
|
*
|
|
* Linus Lüssing
|
|
*/
|
|
|
|
#ifndef _NET_BATMAN_ADV_MULTICAST_H_
|
|
#define _NET_BATMAN_ADV_MULTICAST_H_
|
|
|
|
#include "main.h"
|
|
|
|
#include <linux/netlink.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
/**
|
|
* enum batadv_forw_mode - the way a packet should be forwarded as
|
|
*/
|
|
enum batadv_forw_mode {
|
|
/**
|
|
* @BATADV_FORW_ALL: forward the packet to all nodes (currently via
|
|
* classic flooding)
|
|
*/
|
|
BATADV_FORW_ALL,
|
|
|
|
/**
|
|
* @BATADV_FORW_SOME: forward the packet to some nodes (currently via
|
|
* a multicast-to-unicast conversion and the BATMAN unicast routing
|
|
* protocol)
|
|
*/
|
|
BATADV_FORW_SOME,
|
|
|
|
/**
|
|
* @BATADV_FORW_SINGLE: forward the packet to a single node (currently
|
|
* via the BATMAN unicast routing protocol)
|
|
*/
|
|
BATADV_FORW_SINGLE,
|
|
|
|
/** @BATADV_FORW_NONE: don't forward, drop it */
|
|
BATADV_FORW_NONE,
|
|
};
|
|
|
|
#ifdef CONFIG_BATMAN_ADV_MCAST
|
|
|
|
enum batadv_forw_mode
|
|
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
|
|
struct batadv_orig_node **mcast_single_orig,
|
|
int *is_routable);
|
|
|
|
int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
|
|
struct sk_buff *skb,
|
|
unsigned short vid,
|
|
struct batadv_orig_node *orig_node);
|
|
|
|
int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
|
|
unsigned short vid, int is_routable);
|
|
|
|
void batadv_mcast_init(struct batadv_priv *bat_priv);
|
|
|
|
int batadv_mcast_mesh_info_put(struct sk_buff *msg,
|
|
struct batadv_priv *bat_priv);
|
|
|
|
int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
|
|
|
|
void batadv_mcast_free(struct batadv_priv *bat_priv);
|
|
|
|
void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
|
|
|
|
#else
|
|
|
|
static inline enum batadv_forw_mode
|
|
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
|
|
struct batadv_orig_node **mcast_single_orig,
|
|
int *is_routable)
|
|
{
|
|
return BATADV_FORW_ALL;
|
|
}
|
|
|
|
static inline int
|
|
batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
|
|
struct sk_buff *skb,
|
|
unsigned short vid,
|
|
struct batadv_orig_node *orig_node)
|
|
{
|
|
kfree_skb(skb);
|
|
return NET_XMIT_DROP;
|
|
}
|
|
|
|
static inline int
|
|
batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
|
|
unsigned short vid, int is_routable)
|
|
{
|
|
kfree_skb(skb);
|
|
return NET_XMIT_DROP;
|
|
}
|
|
|
|
static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
|
|
struct netlink_callback *cb)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
|
|
{
|
|
}
|
|
|
|
static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_BATMAN_ADV_MCAST */
|
|
|
|
#endif /* _NET_BATMAN_ADV_MULTICAST_H_ */
|