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[BRIDGE]: drop PAUSE frames
Pause frames should never make it out of the network device into the stack. But if a device was misconfigured, it might happen. So drop pause frames in bridge. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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83aa0938ff
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2111f8b9e5
2 changed files with 7 additions and 1 deletions
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@ -61,6 +61,7 @@
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#define ETH_P_8021Q 0x8100 /* 802.1Q VLAN Extended Header */
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#define ETH_P_IPX 0x8137 /* IPX over DIX */
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#define ETH_P_IPV6 0x86DD /* IPv6 over bluebook */
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#define ETH_P_PAUSE 0x8808 /* IEEE Pause frames. See 802.3 31B */
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#define ETH_P_SLOW 0x8809 /* Slow Protocol. See 802.3ad 43B */
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#define ETH_P_WCCP 0x883E /* Web-cache coordination protocol
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* defined in draft-wilson-wrec-wccp-v2-00.txt */
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@ -131,9 +131,14 @@ struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
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if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
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goto drop;
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if (unlikely(is_link_local(dest)))
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if (unlikely(is_link_local(dest))) {
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/* Pause frames shouldn't be passed up by driver anyway */
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if (skb->protocol == htons(ETH_P_PAUSE))
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goto drop;
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return (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
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NULL, br_handle_local_finish) == 0) ? skb : NULL;
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}
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switch (p->state) {
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case BR_STATE_FORWARDING:
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