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-rw-r--r--net/wireless/util.c40
1 files changed, 39 insertions, 1 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 3fc2df8..59361fd 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -320,7 +320,9 @@ int ieee80211_data_to_8023(struct sk_buff *skb, u8 *addr,
break;
case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
if (unlikely(iftype != NL80211_IFTYPE_WDS &&
- iftype != NL80211_IFTYPE_MESH_POINT))
+ iftype != NL80211_IFTYPE_MESH_POINT &&
+ iftype != NL80211_IFTYPE_AP_VLAN &&
+ iftype != NL80211_IFTYPE_STATION))
return -1;
if (iftype == NL80211_IFTYPE_MESH_POINT) {
struct ieee80211s_hdr *meshdr =
@@ -656,7 +658,14 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
!(rdev->wiphy.interface_modes & (1 << ntype)))
return -EOPNOTSUPP;
+ /* if it's part of a bridge, reject changing type to station/ibss */
+ if (dev->br_port && (ntype == NL80211_IFTYPE_ADHOC ||
+ ntype == NL80211_IFTYPE_STATION))
+ return -EBUSY;
+
if (ntype != otype) {
+ dev->ieee80211_ptr->use_4addr = false;
+
switch (otype) {
case NL80211_IFTYPE_ADHOC:
cfg80211_leave_ibss(rdev, dev, false);
@@ -680,5 +689,34 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
+ if (!err && params && params->use_4addr != -1)
+ dev->ieee80211_ptr->use_4addr = params->use_4addr;
+
+ if (!err) {
+ dev->priv_flags &= ~IFF_DONT_BRIDGE;
+ switch (ntype) {
+ case NL80211_IFTYPE_STATION:
+ if (dev->ieee80211_ptr->use_4addr)
+ break;
+ /* fall through */
+ case NL80211_IFTYPE_ADHOC:
+ dev->priv_flags |= IFF_DONT_BRIDGE;
+ break;
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_WDS:
+ case NL80211_IFTYPE_MESH_POINT:
+ /* bridging OK */
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ /* monitor can't bridge anyway */
+ break;
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case __NL80211_IFTYPE_AFTER_LAST:
+ /* not happening */
+ break;
+ }
+ }
+
return err;
}
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