You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.5 KiB
43 lines
1.5 KiB
From: Stephen Hemminger <stephen@networkplumber.org>
|
|
Subject: bridge: allow receiption on disabled port
|
|
|
|
When an ethernet device is enslaved to a bridge, and the bridge STP
|
|
detects loss of carrier (or operational state down), then normally
|
|
packet receiption is blocked.
|
|
|
|
This breaks control applications like WPA which maybe expecting to
|
|
receive packets to negotiate to bring link up. The bridge needs to
|
|
block forwarding packets from these disabled ports, but there is no
|
|
hard requirement to not allow local packet delivery.
|
|
|
|
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
|
|
--- a/net/bridge/br_input.c
|
|
+++ b/net/bridge/br_input.c
|
|
@@ -195,6 +195,9 @@ static void __br_handle_local_finish(str
|
|
/* note: already called with rcu_read_lock */
|
|
static int br_handle_local_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
+ struct net_bridge_port *p = br_port_get_rcu(skb->dev);
|
|
+
|
|
+ if (p->state != BR_STATE_DISABLED)
|
|
__br_handle_local_finish(skb);
|
|
|
|
/* return 1 to signal the okfn() was called so it's ok to use the skb */
|
|
@@ -291,6 +294,15 @@ rx_handler_result_t br_handle_frame(stru
|
|
|
|
forward:
|
|
switch (p->state) {
|
|
+ case BR_STATE_DISABLED:
|
|
+ if (ether_addr_equal(p->br->dev->dev_addr, dest))
|
|
+ skb->pkt_type = PACKET_HOST;
|
|
+
|
|
+ NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING,
|
|
+ dev_net(skb->dev), NULL, skb, skb->dev, NULL,
|
|
+ br_handle_local_finish);
|
|
+ break;
|
|
+
|
|
case BR_STATE_FORWARDING:
|
|
rhook = rcu_dereference(br_should_route_hook);
|
|
if (rhook) {
|
|
|