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From: Felix Fietkau <nbd@nbd.name>
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Date: Fri, 7 Jul 2017 17:18:54 +0200
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Subject: bridge: only accept EAP locally
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When bridging, do not forward EAP frames to other ports, only deliver
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them locally, regardless of the state.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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[add disable_eap_hack sysfs attribute]
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Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
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---
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--- a/net/bridge/br_input.c
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+++ b/net/bridge/br_input.c
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@@ -108,10 +108,14 @@ int br_handle_frame_finish(struct net *n
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}
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}
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+ BR_INPUT_SKB_CB(skb)->brdev = br->dev;
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+
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+ if (skb->protocol == htons(ETH_P_PAE) && !br->disable_eap_hack)
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+ return br_pass_frame_up(skb);
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+
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if (p->state == BR_STATE_LEARNING)
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goto drop;
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- BR_INPUT_SKB_CB(skb)->brdev = br->dev;
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BR_INPUT_SKB_CB(skb)->src_port_isolated = !!(p->flags & BR_ISOLATED);
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if (IS_ENABLED(CONFIG_INET) &&
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--- a/net/bridge/br_private.h
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+++ b/net/bridge/br_private.h
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@@ -337,6 +337,8 @@ struct net_bridge {
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u16 group_fwd_mask;
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u16 group_fwd_mask_required;
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+ bool disable_eap_hack;
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+
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/* STP */
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bridge_id designated_root;
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bridge_id bridge_id;
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--- a/net/bridge/br_sysfs_br.c
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+++ b/net/bridge/br_sysfs_br.c
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@@ -170,6 +170,30 @@ static ssize_t group_fwd_mask_store(stru
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}
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static DEVICE_ATTR_RW(group_fwd_mask);
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+static ssize_t disable_eap_hack_show(struct device *d,
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+ struct device_attribute *attr,
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+ char *buf)
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+{
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+ struct net_bridge *br = to_bridge(d);
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+ return sprintf(buf, "%u\n", br->disable_eap_hack);
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+}
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+
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+static int set_disable_eap_hack(struct net_bridge *br, unsigned long val)
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+{
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+ br->disable_eap_hack = !!val;
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+
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+ return 0;
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+}
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+
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+static ssize_t disable_eap_hack_store(struct device *d,
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+ struct device_attribute *attr,
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+ const char *buf,
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+ size_t len)
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+{
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+ return store_bridge_parm(d, buf, len, set_disable_eap_hack);
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+}
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+static DEVICE_ATTR_RW(disable_eap_hack);
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+
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static ssize_t priority_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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@@ -810,6 +834,7 @@ static struct attribute *bridge_attrs[]
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&dev_attr_ageing_time.attr,
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&dev_attr_stp_state.attr,
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&dev_attr_group_fwd_mask.attr,
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+ &dev_attr_disable_eap_hack.attr,
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&dev_attr_priority.attr,
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&dev_attr_bridge_id.attr,
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&dev_attr_root_id.attr,
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