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batman-adv: Reject unicast packet with zero/mcast dst address

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An unicast batman-adv packet cannot be transmitted to a multicast or zero
mac address. So reject incoming packets which still have these classes of
addresses as destination mac address in the outer ethernet header.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Sven Eckelmann 2016-08-06 17:04:23 +02:00 committed by Simon Wunderlich
parent 92eef520d7
commit 93bbaab455
1 changed files with 4 additions and 4 deletions
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8
net/batman-adv/routing.c
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@ -364,8 +364,8 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
ethhdr = eth_hdr(skb); ethhdr = eth_hdr(skb);
/* packet with unicast indication but broadcast recipient */ /* packet with unicast indication but non-unicast recipient */
if (is_broadcast_ether_addr(ethhdr->h_dest)) if (!is_valid_ether_addr(ethhdr->h_dest))
goto free_skb; goto free_skb;
/* packet with broadcast/multicast sender address */ /* packet with broadcast/multicast sender address */
@ -462,8 +462,8 @@ static int batadv_check_unicast_packet(struct batadv_priv *bat_priv,
ethhdr = eth_hdr(skb); ethhdr = eth_hdr(skb);
/* packet with unicast indication but broadcast recipient */ /* packet with unicast indication but non-unicast recipient */
if (is_broadcast_ether_addr(ethhdr->h_dest)) if (!is_valid_ether_addr(ethhdr->h_dest))
return -EBADR; return -EBADR;
/* packet with broadcast/multicast sender address */ /* packet with broadcast/multicast sender address */