1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 7 Jul 2017 17:18:54 +0200
Subject: bridge: only accept EAP locally
When bridging, do not forward EAP frames to other ports, only deliver
them locally, regardless of the state.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
[add disable_eap_hack sysfs attribute]
Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
---
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -166,10 +166,14 @@ int br_handle_frame_finish(struct net *n
}
}
+ BR_INPUT_SKB_CB(skb)->brdev = br->dev;
+
+ if (skb->protocol == htons(ETH_P_PAE) && !br->disable_eap_hack)
+ return br_pass_frame_up(skb);
+
if (p->state == BR_STATE_LEARNING)
goto drop;
- BR_INPUT_SKB_CB(skb)->brdev = br->dev;
BR_INPUT_SKB_CB(skb)->src_port_isolated = !!(p->flags & BR_ISOLATED);
if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -320,6 +320,8 @@ struct net_bridge {
u16 group_fwd_mask;
u16 group_fwd_mask_required;
+ bool disable_eap_hack;
+
/* STP */
bridge_id designated_root;
bridge_id bridge_id;
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -170,6 +170,30 @@ static ssize_t group_fwd_mask_store(stru
}
static DEVICE_ATTR_RW(group_fwd_mask);
+static ssize_t disable_eap_hack_show(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct net_bridge *br = to_bridge(d);
+ return sprintf(buf, "%u\n", br->disable_eap_hack);
+}
+
+static int set_disable_eap_hack(struct net_bridge *br, unsigned long val)
+{
+ br->disable_eap_hack = !!val;
+
+ return 0;
+}
+
+static ssize_t disable_eap_hack_store(struct device *d,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t len)
+{
+ return store_bridge_parm(d, buf, len, set_disable_eap_hack);
+}
+static DEVICE_ATTR_RW(disable_eap_hack);
+
static ssize_t priority_show(struct device *d, struct device_attribute *attr,
char *buf)
{
@@ -817,6 +841,7 @@ static struct attribute *bridge_attrs[]
&dev_attr_ageing_time.attr,
&dev_attr_stp_state.attr,
&dev_attr_group_fwd_mask.attr,
+ &dev_attr_disable_eap_hack.attr,
&dev_attr_priority.attr,
&dev_attr_bridge_id.attr,
&dev_attr_root_id.attr,
|
