nl80211: Check iftype in cfg80211 code

We do not want to require all the drivers using cfg80211 to need to do
this. In addition, make the error values consistent by using
EOPNOTSUPP instead of semi-random assortment of errno values.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 56 insertions, 2 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 6bb73a3a3391..a7d0b94f6b5e 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1049,6 +1049,11 @@ static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
         if (err)
                 goto unlock_rtnl;
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         switch (info->genlhdr->cmd) {
         case NL80211_CMD_NEW_BEACON:
                 /* these are required for NEW_BEACON */
@@ -1136,6 +1141,10 @@ static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
         err = drv->ops->del_beacon(&drv->wiphy, dev);
 
  out:
@@ -1324,7 +1333,7 @@ static int nl80211_dump_station(struct sk_buff *skb,
         }
 
         if (!dev->ops->dump_station) {
-                err = -ENOSYS;
+                err = -EOPNOTSUPP;
                 goto out_err;
         }
 
@@ -1698,10 +1707,15 @@ static int nl80211_dump_mpath(struct sk_buff *skb,
         }
 
         if (!dev->ops->dump_mpath) {
-                err = -ENOSYS;
+                err = -EOPNOTSUPP;
                 goto out_err;
         }
 
+        if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         while (1) {
                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
                                            dst, next_hop, &pinfo);
@@ -1759,6 +1773,11 @@ static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
         if (err)
                 goto out;
@@ -1813,6 +1832,11 @@ static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         if (!netif_running(dev)) {
                 err = -ENETDOWN;
                 goto out;
@@ -1856,6 +1880,11 @@ static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         if (!netif_running(dev)) {
                 err = -ENETDOWN;
                 goto out;
@@ -1944,6 +1973,11 @@ static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         err = drv->ops->change_bss(&drv->wiphy, dev, &params);
 
  out:
@@ -2661,6 +2695,11 @@ static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         if (!netif_running(dev)) {
                 err = -ENETDOWN;
                 goto out;
@@ -2734,6 +2773,11 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         if (!netif_running(dev)) {
                 err = -ENETDOWN;
                 goto out;
@@ -2797,6 +2841,11 @@ static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         if (!netif_running(dev)) {
                 err = -ENETDOWN;
                 goto out;
@@ -2856,6 +2905,11 @@ static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
+        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
         if (!netif_running(dev)) {
                 err = -ENETDOWN;
                 goto out;