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batman-adv: check for more types of invalid IP addresses in DAT 

There are more types of IP addresses that may appear in ARP packets that we
don't want to process. While some of these should never appear in sane ARP
packets, a 0.0.0.0 source is used for duplicate address detection and thus seen
quite often.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Acked-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
This commit is contained in:
Matthias Schiffer 2013-01-24 18:18:26 +01:00 committed by Antonio Quartulli
parent 0d15becee5
commit 757dd82ea7
1 changed files with 3 additions and 1 deletions
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4
net/batman-adv/distributed-arp-table.c
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@ -777,7 +777,9 @@ static uint16_t batadv_arp_get_type(struct batadv_priv *bat_priv,
ip_src = batadv_arp_ip_src(skb, hdr_size);
ip_dst = batadv_arp_ip_dst(skb, hdr_size);
if (ipv4_is_loopback(ip_src) || ipv4_is_multicast(ip_src) ||
ipv4_is_loopback(ip_dst) || ipv4_is_multicast(ip_dst))
ipv4_is_loopback(ip_dst) || ipv4_is_multicast(ip_dst) ||
ipv4_is_zeronet(ip_src) || ipv4_is_lbcast(ip_src) ||
ipv4_is_zeronet(ip_dst) || ipv4_is_lbcast(ip_dst))
goto out;
type = ntohs(arphdr->ar_op);