Commit 8f182b49 authored May 25, 2006 by Stephen Hemminger Committed by David S. Miller Jun 17, 2006

[LLC]: allow applications to get copy of kernel datagrams



It is legal for an application to bind to a SAP that is also being
used by the kernel. This happens if the bridge module binds to the
STP SAP, and the user wants to have a daemon for STP as well.
It is possible to have kernel doing STP on one bridge, but
let application do RSTP on another bridge.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 23dbe791

net/llc/llc_input.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -173,8 +173,10 @@ int llc_rcv(struct sk_buff skb, struct net_device dev,
		*/
		rcv = rcu_dereference(sap->rcv_func);
		if (rcv) {
		struct sk_buff *cskb = skb_clone(skb, GFP_ATOMIC);
		if (cskb)
		rcv(cskb, dev, pt, orig_dev);
		rcv(skb, dev, pt, orig_dev);
		goto out_put;
		}
		dest = llc_pdu_type(skb);
		if (unlikely(!dest \|\| !llc_type_handlers[dest - 1]))