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| author | Stephen Hemminger <shemminger@osdl.org> | 2005-12-21 19:00:18 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-01-03 13:11:02 -0800 |
| commit | 0e5eabac4995e128f06b90df64b93604625de6de (patch) | |
| tree | 1c01b11f47943eadac79a5a0ba6d15f2bb98f24c /net | |
| parent | 4433f420e57afae0ab308b1e2b979f09c86bc115 (diff) | |
| download | linux-0e5eabac4995e128f06b90df64b93604625de6de.tar.gz linux-0e5eabac4995e128f06b90df64b93604625de6de.tar.bz2 linux-0e5eabac4995e128f06b90df64b93604625de6de.zip | |
[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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bridge/br_input.c | 11 |
1 files changed, 7 insertions, 4 deletions
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; |