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Diffstat (limited to 'net/wireless/nl80211.c')
-rw-r--r--net/wireless/nl80211.c34
1 files changed, 33 insertions, 1 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 6634188f945..b7b0f67b0c6 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -968,6 +968,28 @@ static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
return 0;
}
+static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
+ u8 use_4addr, enum nl80211_iftype iftype)
+{
+ if (!use_4addr)
+ return 0;
+
+ switch (iftype) {
+ case NL80211_IFTYPE_AP_VLAN:
+ if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
+ return 0;
+ break;
+ case NL80211_IFTYPE_STATION:
+ if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
+ return 0;
+ break;
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
@@ -1011,6 +1033,9 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_4ADDR]) {
params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
change = true;
+ err = nl80211_valid_4addr(rdev, params.use_4addr, ntype);
+ if (err)
+ goto unlock;
} else {
params.use_4addr = -1;
}
@@ -1034,6 +1059,9 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
else
err = 0;
+ if (!err && params.use_4addr != -1)
+ dev->ieee80211_ptr->use_4addr = params.use_4addr;
+
unlock:
dev_put(dev);
cfg80211_unlock_rdev(rdev);
@@ -1081,8 +1109,12 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
}
- if (info->attrs[NL80211_ATTR_4ADDR])
+ if (info->attrs[NL80211_ATTR_4ADDR]) {
params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
+ err = nl80211_valid_4addr(rdev, params.use_4addr, type);
+ if (err)
+ goto unlock;
+ }
err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,