X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;ds=sidebyside;f=net%2Fbridge%2Fbr_input.c;h=8a55276320921b1e2f82d3c3862854d69c9d3df4;hb=467aea0ddfd1f0f1158c57cbef0e8941dd63374c;hp=b0b7f55c1edd38f2901cfc450ac638ca6589dd80;hpb=4741c336d27dec3ea68a35659abb8dc82b142388;p=powerpc.git

diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index b0b7f55c1e..8a55276320 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -66,6 +66,7 @@ int br_handle_frame_finish(struct sk_buff *skb)
 	}
 
 	if (is_multicast_ether_addr(dest)) {
+		br->statistics.multicast++;
 		br_flood_forward(br, skb, !passedup);
 		if (!passedup)
 			br_pass_frame_up(br, skb);
@@ -111,46 +112,51 @@ static int br_handle_local_finish(struct sk_buff *skb)
  */
 static inline int is_link_local(const unsigned char *dest)
 {
-	return memcmp(dest, br_group_address, 5) == 0 && (dest[5] & 0xf0) == 0;
+	const u16 *a = (const u16 *) dest;
+	static const u16 *const b = (const u16 *const ) br_group_address;
+	static const u16 m = __constant_cpu_to_be16(0xfff0);
+
+	return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | ((a[2] ^ b[2]) & m)) == 0;
 }
 
 /*
  * Called via br_handle_frame_hook.
- * Return 0 if *pskb should be processed furthur
- *	  1 if *pskb is handled
- * note: already called with rcu_read_lock (preempt_disabled) 
+ * Return NULL if skb is handled
+ * note: already called with rcu_read_lock (preempt_disabled)
  */
-int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
+struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
 {
-	struct sk_buff *skb = *pskb;
 	const unsigned char *dest = eth_hdr(skb)->h_dest;
 
 	if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
-		goto err;
+		goto drop;
 
 	if (unlikely(is_link_local(dest))) {
 		skb->pkt_type = PACKET_HOST;
-		return NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
-			       NULL, br_handle_local_finish) != 0;
+
+		return (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
+				NULL, br_handle_local_finish) == 0) ? skb : NULL;
 	}
 
-	if (p->state == BR_STATE_FORWARDING || p->state == BR_STATE_LEARNING) {
+	switch (p->state) {
+	case BR_STATE_FORWARDING:
+
 		if (br_should_route_hook) {
-			if (br_should_route_hook(pskb)) 
-				return 0;
-			skb = *pskb;
+			if (br_should_route_hook(&skb))
+				return skb;
 			dest = eth_hdr(skb)->h_dest;
 		}
-
+		/* fall through */
+	case BR_STATE_LEARNING:
 		if (!compare_ether_addr(p->br->dev->dev_addr, dest))
 			skb->pkt_type = PACKET_HOST;
 
 		NF_HOOK(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
 			br_handle_frame_finish);
-		return 1;
+		break;
+	default:
+drop:
+		kfree_skb(skb);
 	}
-
-err:
-	kfree_skb(skb);
-	return 1;
+	return NULL;
 }