From c9c556b63b19c8b52de5c5ea6f47ab16fc540e47 Mon Sep 17 00:00:00 2001 From: Marek Lindner Date: Mon, 22 Nov 2010 00:56:04 +0100 Subject: [PATCH] Staging: batman-adv: best gw DHCP filter 802.1Q support 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 [sven.eckelmann@gmx.de: Rework on top of current version] Signed-off-by: Sven Eckelmann Signed-off-by: Greg Kroah-Hartman --- drivers/staging/batman-adv/gateway_client.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/staging/batman-adv/gateway_client.c b/drivers/staging/batman-adv/gateway_client.c index 3d4e1096a9d..fde1d8a952f 100644 --- a/drivers/staging/batman-adv/gateway_client.c +++ b/drivers/staging/batman-adv/gateway_client.c @@ -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; -- 2.20.1