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authorMatthias Schiffer <mschiffer@universe-factory.net>2013-01-24 21:18:26 +0400
committerAntonio Quartulli <ordex@autistici.org>2013-01-27 17:02:39 +0400
commit757dd82ea7008ddaccfecff3397bec3e3203a89e (patch)
treebd590a987bff0d4b4a680afc681d0e062acdd0ca /net/batman-adv
parent0d15becee56fdfc2e9a4374c46ea7cf7562a6f32 (diff)
downloadlinux-757dd82ea7008ddaccfecff3397bec3e3203a89e.tar.xz
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>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/distributed-arp-table.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index ce0d2992381a..ccb3c6c96ba7 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -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);