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vlan: dont drop packets from unknown vlans in promiscuous mode

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Roger Luethi noticed packets for unknown VLANs getting silently dropped
even in promiscuous mode.

Check for promiscuous mode in __vlan_hwaccel_rx() and vlan_gro_common()
before drops.

As suggested by Patrick, mark such packets to have skb->pkt_type set to
PACKET_OTHERHOST to make sure they are dropped by IP stack.

Reported-by: Roger Luethi <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
CC: Patrick McHardy <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2010-09-30 02:16:44 +00:00 • committed by David S. Miller
commit 173e79fb70
1 changed files with 10 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

14
net/8021q/vlan_core.c
View file

@ -24,8 +24,11 @@ int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
if (vlan_dev)
skb->dev = vlan_dev;
else if (vlan_id)
goto drop;
else if (vlan_id) {
if (!(skb->dev->flags & IFF_PROMISC))
goto drop;
skb->pkt_type = PACKET_OTHERHOST;
}
return (polling ? netif_receive_skb(skb) : netif_rx(skb));
@ -102,8 +105,11 @@ vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
if (vlan_dev)
skb->dev = vlan_dev;
else if (vlan_id)
goto drop;
else if (vlan_id) {
if (!(skb->dev->flags & IFF_PROMISC))
goto drop;
skb->pkt_type = PACKET_OTHERHOST;
}
for (p = napi->gro_list; p; p = p->next) {
NAPI_GRO_CB(p)->same_flow =