From: Stephen Hemminger Date: Thu, 22 Dec 2005 03:00:18 +0000 (-0800) Subject: [BRIDGE]: filter packets in learning state X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0e5eabac4995e128f06b90df64b93604625de6de;p=linux-beck.git [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 Signed-off-by: David S. Miller --- diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index b88220a64cd8..c387852f753a 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;