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authorStephen Hemminger <shemminger@osdl.org>2005-12-21 19:00:18 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-03 13:11:02 -0800
commit0e5eabac4995e128f06b90df64b93604625de6de (patch)
tree1c01b11f47943eadac79a5a0ba6d15f2bb98f24c
parent4433f420e57afae0ab308b1e2b979f09c86bc115 (diff)
[BRIDGE]: filter packets in learning state
While in the learning state, run filters but drop the result. This prevents us from acquiring bad fdb entries in learning state. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bridge/br_input.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index b88220a64cd..c387852f753 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -53,6 +53,11 @@ int br_handle_frame_finish(struct sk_buff *skb)
/* insert into forwarding database after filtering to avoid spoofing */
br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
+ if (p->state == BR_STATE_LEARNING) {
+ kfree_skb(skb);
+ goto out;
+ }
+
if (br->dev->flags & IFF_PROMISC) {
struct sk_buff *skb2;
@@ -107,9 +112,6 @@ int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
goto err;
- if (p->state == BR_STATE_LEARNING)
- br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
-
if (p->br->stp_enabled &&
!memcmp(dest, bridge_ula, 5) &&
!(dest[5] & 0xF0)) {
@@ -118,9 +120,10 @@ int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
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;