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Staging: batman-adv: best gw DHCP filter 802.1Q support

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The DHCP filter inspects packets to determine whether or not to send
them via ethernet unicast. This patch adds 802.1Q (vlan) support for
this check.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
[sven.eckelmann@gmx.de: Rework on top of current version]
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Marek Lindner
2010-11-22 00:56:04 +01:00
committed by Greg Kroah-Hartman
parent 6c3a42db6c
commit c9c556b63b
1 changed files with 8 additions and 0 deletions
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8
drivers/staging/batman-adv/gateway_client.c
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@@ -415,6 +415,14 @@ int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
ethhdr = (struct ethhdr *)skb->data;
header_len += ETH_HLEN;
/* check for initial vlan header */
if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) {
if (!pskb_may_pull(skb, header_len + VLAN_HLEN))
return 0;
ethhdr = (struct ethhdr *)(skb->data + VLAN_HLEN);
header_len += VLAN_HLEN;
}
/* check for ip header */
if (ntohs(ethhdr->h_proto) != ETH_P_IP)
return 0;