const unsigned char bridge_ula[6] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
-static int br_pass_frame_up_finish(struct sk_buff *skb)
-{
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug = 0;
-#endif
- netif_rx(skb);
-
- return 0;
-}
-
static void br_pass_frame_up(struct net_bridge *br, struct sk_buff *skb)
{
struct net_device *indev;
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) */
int br_handle_frame_finish(struct sk_buff *skb)
{
const unsigned char *dest = eth_hdr(skb)->h_dest;
- struct net_bridge_port *p = skb->dev->br_port;
- struct net_bridge *br = p->br;
+ struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
+ struct net_bridge *br;
struct net_bridge_fdb_entry *dst;
int passedup = 0;
+ if (!p || p->state == BR_STATE_DISABLED)
+ goto drop;
+
+ /* insert into forwarding database after filtering to avoid spoofing */
+ br = p->br;
+ br_fdb_update(br, p, eth_hdr(skb)->h_source);
+
+ if (p->state == BR_STATE_LEARNING)
+ goto drop;
+
if (br->dev->flags & IFF_PROMISC) {
struct sk_buff *skb2;
}
}
- if (dest[0] & 1) {
+ if (is_multicast_ether_addr(dest)) {
br_flood_forward(br, skb, !passedup);
if (!passedup)
br_pass_frame_up(br, skb);
out:
return 0;
+drop:
+ kfree_skb(skb);
+ goto out;
}
/*
if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
goto err;
- if (p->state == BR_STATE_LEARNING ||
- p->state == BR_STATE_FORWARDING)
- br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
-
if (p->br->stp_enabled &&
!memcmp(dest, bridge_ula, 5) &&
!(dest[5] & 0xF0)) {
NULL, br_stp_handle_bpdu);
return 1;
}
+ goto err;
}
- else if (p->state == BR_STATE_FORWARDING) {
+ if (p->state == BR_STATE_FORWARDING || p->state == BR_STATE_LEARNING) {
if (br_should_route_hook) {
if (br_should_route_hook(pskb))
return 0;
dest = eth_hdr(skb)->h_dest;
}
- if (!memcmp(p->br->dev->dev_addr, dest, ETH_ALEN))
+ 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,