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[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>
This commit is contained in:
Stephen Hemminger 2005-12-21 19:00:18 -08:00 committed by David S. Miller
parent 4433f420e5
commit 0e5eabac49
1 changed files with 7 additions and 4 deletions
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11
net/bridge/br_input.c
View File

@ -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;