OpenWrt – Blame information for rev 3
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Rev | Author | Line No. | Line |
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1 | office | 1 | From: Stephen Hemminger <stephen@networkplumber.org> |
2 | Subject: bridge: allow receiption on disabled port |
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3 | |||
4 | When an ethernet device is enslaved to a bridge, and the bridge STP |
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5 | detects loss of carrier (or operational state down), then normally |
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6 | packet receiption is blocked. |
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7 | |||
8 | This breaks control applications like WPA which maybe expecting to |
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9 | receive packets to negotiate to bring link up. The bridge needs to |
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10 | block forwarding packets from these disabled ports, but there is no |
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11 | hard requirement to not allow local packet delivery. |
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12 | |||
13 | Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> |
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14 | Signed-off-by: Felix Fietkau <nbd@nbd.name> |
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15 | |||
16 | --- a/net/bridge/br_input.c |
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17 | +++ b/net/bridge/br_input.c |
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3 | office | 18 | @@ -238,7 +238,8 @@ static int br_handle_local_finish(struct |
1 | office | 19 | { |
20 | struct net_bridge_port *p = br_port_get_rcu(skb->dev); |
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21 | |||
22 | - __br_handle_local_finish(skb); |
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23 | + if (p->state != BR_STATE_DISABLED) |
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24 | + __br_handle_local_finish(skb); |
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25 | |||
26 | BR_INPUT_SKB_CB(skb)->brdev = p->br->dev; |
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27 | br_pass_frame_up(skb); |
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3 | office | 28 | @@ -326,6 +327,15 @@ rx_handler_result_t br_handle_frame(stru |
1 | office | 29 | |
30 | forward: |
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31 | switch (p->state) { |
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32 | + case BR_STATE_DISABLED: |
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33 | + if (ether_addr_equal(p->br->dev->dev_addr, dest)) |
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34 | + skb->pkt_type = PACKET_HOST; |
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35 | + |
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36 | + NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, |
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37 | + dev_net(skb->dev), NULL, skb, skb->dev, NULL, |
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38 | + br_handle_local_finish); |
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39 | + break; |
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40 | + |
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41 | case BR_STATE_FORWARDING: |
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42 | rhook = rcu_dereference(br_should_route_hook); |
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43 | if (rhook) { |