Merge branch 'misc' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc...

[pandora-kernel.git] / net / bridge / br_input.c

diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 4eef837..b0b7f55 100644 (file)
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -19,13 +19,8 @@
 #include <linux/netfilter_bridge.h>
 #include "br_private.h"
 
-const unsigned char bridge_ula[6] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
-
-static int br_pass_frame_up_finish(struct sk_buff *skb)
-{
-       netif_receive_skb(skb);
-       return 0;
-}
+/* Bridge group multicast address 802.1d (pg 51). */
+const u8 br_group_address[ETH_ALEN] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
 
 static void br_pass_frame_up(struct net_bridge *br, struct sk_buff *skb)
 {
@@ -38,7 +33,7 @@ static void br_pass_frame_up(struct net_bridge *br, struct sk_buff *skb)
        skb->dev = br->dev;
 
        NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
-                       br_pass_frame_up_finish);
+               netif_receive_skb);
 }
 
 /* note: already called with rcu_read_lock (preempt_disabled) */
@@ -100,6 +95,25 @@ drop:
        goto out;
 }
 
+/* note: already called with rcu_read_lock (preempt_disabled) */
+static int br_handle_local_finish(struct sk_buff *skb)
+{
+       struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
+
+       if (p && p->state != BR_STATE_DISABLED)
+               br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
+
+       return 0;        /* process further */
+}
+
+/* Does address match the link local multicast address.
+ * 01:80:c2:00:00:0X
+ */
+static inline int is_link_local(const unsigned char *dest)
+{
+       return memcmp(dest, br_group_address, 5) == 0 && (dest[5] & 0xf0) == 0;
+}
+
 /*
  * Called via br_handle_frame_hook.
  * Return 0 if *pskb should be processed furthur
@@ -111,21 +125,13 @@ int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
        struct sk_buff *skb = *pskb;
        const unsigned char *dest = eth_hdr(skb)->h_dest;
 
-       if (p->state == BR_STATE_DISABLED)
-               goto err;
-
        if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
                goto err;
 
-       if (p->br->stp_enabled &&
-           !memcmp(dest, bridge_ula, 5) &&
-           !(dest[5] & 0xF0)) {
-               if (!dest[5]) {
-                       NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev, 
-                               NULL, br_stp_handle_bpdu);
-                       return 1;
-               }
-               goto err;
+       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;
        }
 
        if (p->state == BR_STATE_FORWARDING || p->state == BR_STATE_LEARNING) {