mac80211: support adding/removing keys via cfg80211

This adds the necessary hooks to mac80211 to allow userspace
to edit keys with cfg80211 (through nl80211.)

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 91 insertions, 0 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9e2bc1fd0237..d49f7b58b05c 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -6,6 +6,7 @@
  * This file is GPLv2 as found in COPYING.
  */
 
+#include <linux/ieee80211.h>
 #include <linux/nl80211.h>
 #include <linux/rtnetlink.h>
 #include <net/net_namespace.h>
@@ -99,8 +100,98 @@ static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
         return 0;
 }
 
+static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
+                             u8 key_idx, u8 *mac_addr,
+                             struct key_params *params)
+{
+        struct ieee80211_sub_if_data *sdata;
+        struct sta_info *sta = NULL;
+        enum ieee80211_key_alg alg;
+        int ret;
+
+        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+        switch (params->cipher) {
+        case WLAN_CIPHER_SUITE_WEP40:
+        case WLAN_CIPHER_SUITE_WEP104:
+                alg = ALG_WEP;
+                break;
+        case WLAN_CIPHER_SUITE_TKIP:
+                alg = ALG_TKIP;
+                break;
+        case WLAN_CIPHER_SUITE_CCMP:
+                alg = ALG_CCMP;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        if (mac_addr) {
+                sta = sta_info_get(sdata->local, mac_addr);
+                if (!sta)
+                        return -ENOENT;
+        }
+
+        ret = 0;
+        if (!ieee80211_key_alloc(sdata, sta, alg, key_idx,
+                                 params->key_len, params->key))
+                ret = -ENOMEM;
+
+        if (sta)
+                sta_info_put(sta);
+
+        return ret;
+}
+
+static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
+                             u8 key_idx, u8 *mac_addr)
+{
+        struct ieee80211_sub_if_data *sdata;
+        struct sta_info *sta;
+        int ret;
+
+        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+        if (mac_addr) {
+                sta = sta_info_get(sdata->local, mac_addr);
+                if (!sta)
+                        return -ENOENT;
+
+                ret = 0;
+                if (sta->key)
+                        ieee80211_key_free(sta->key);
+                else
+                        ret = -ENOENT;
+
+                sta_info_put(sta);
+                return ret;
+        }
+
+        if (!sdata->keys[key_idx])
+                return -ENOENT;
+
+        ieee80211_key_free(sdata->keys[key_idx]);
+
+        return 0;
+}
+
+static int ieee80211_config_default_key(struct wiphy *wiphy,
+                                        struct net_device *dev,
+                                        u8 key_idx)
+{
+        struct ieee80211_sub_if_data *sdata;
+
+        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+        ieee80211_set_default_key(sdata, key_idx);
+
+        return 0;
+}
+
 struct cfg80211_ops mac80211_config_ops = {
         .add_virtual_intf = ieee80211_add_iface,
         .del_virtual_intf = ieee80211_del_iface,
         .change_virtual_intf = ieee80211_change_iface,
+        .add_key = ieee80211_add_key,
+        .del_key = ieee80211_del_key,
+        .set_default_key = ieee80211_config_default_key,
 };