On Wed, 2014-08-27 at 13:23 +0300, Julian Anastasov wrote:
> CLUSTERIP works in LOCAL_IN. My preference is to
> add checks in every protocol where it is missing but if
> you prefer a global check, ip_local_deliver_finish() is
> a good place: CLUSTERIP already changed pkt_type to
> PACKET_HOST. For example:
>
> if (!(skb_rtable(skb)->rt_flags &
> (RTCF_BROADCAST | RTCF_MULTICAST)) &&
> (skb->pkt_type == PACKET_BROADCAST ||
> skb->pkt_type == PACKET_MULTICAST)) {
> kfree_skb(skb);
> return;
> }
>
> By this way we protect the local stack globally.
I suppose that'd work then?
> BTW, what kind of packets (protocol) we want to drop? UDP?
All IP protocols, this comes either from the IPv4 RFC (1122) or from the
wireless issue which affects all protocols.
> As for ip_forward(), there is already check for
> PACKET_HOST.
>
> Not sure, may be a MIB counter for such drops
> would be useful.
Yeah, maybe, not sure.
johannes
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