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batman-adv: prevent multiple ARP replies sent by gateways if dat enabled

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If dat is enabled it must be made sure that only the backbone gw which has
claimed the remote destination for the ARP request answers the ARP request
directly if the MAC address is known due to the local dat table. This
prevents multiple ARP replies in a common backbone if more than one
gateway already knows the remote mac searched for in the ARP request.

Signed-off-by: Andreas Pape <apape@phoenixcontact.com>
Acked-by: Simon Wunderlich <sw@simonwunderlich.de>
[sven@narfation.org: fix conflicts with current version]
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Andreas Pape
2016-09-05 13:20:25 +02:00
committed by Simon Wunderlich
parent 13b0ea0f59
commit 00311de5fb
3 changed files with 75 additions and 0 deletions
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11
net/batman-adv/bridge_loop_avoidance.h
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@@ -69,6 +69,10 @@ void batadv_bla_status_update(struct net_device *net_dev);
int batadv_bla_init(struct batadv_priv *bat_priv);
void batadv_bla_free(struct batadv_priv *bat_priv);
int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
#ifdef CONFIG_BATMAN_ADV_DAT
bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
unsigned short vid);
#endif
#define BATADV_BLA_CRC_INIT 0
#else /* ifdef CONFIG_BATMAN_ADV_BLA */
@@ -145,6 +149,13 @@ static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
return -EOPNOTSUPP;
}
static inline
bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
unsigned short vid)
{
return true;
}
#endif /* ifdef CONFIG_BATMAN_ADV_BLA */
#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */