#include <linux/netfilter_bridge.h>
#include "br_private.h"
-const unsigned char bridge_ula[6] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
+/* 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)
{
}
if (is_multicast_ether_addr(dest)) {
+ br->statistics.multicast++;
br_flood_forward(br, skb, !passedup);
if (!passedup)
br_pass_frame_up(br, skb);
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
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) {