cfg80211/mac80211: allow action frame TX/RX in IBSS

When in IBSS mode, currently action frame TX and RX
cannot be used. Allow using it to talk to any peer,
or for public action frames. Also, while at it,
restructure the code in mac80211 to make it easier
to add this for other interface types in the future.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 49 insertions, 3 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 952845e7072a..59f597d0c6a0 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1555,9 +1555,55 @@ static int ieee80211_action(struct wiphy *wiphy, struct net_device *dev,
                             bool channel_type_valid,
                             const u8 *buf, size_t len, u64 *cookie)
 {
-        return ieee80211_mgd_action(IEEE80211_DEV_TO_SUB_IF(dev), chan,
-                                    channel_type, channel_type_valid,
-                                    buf, len, cookie);
+        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+        struct ieee80211_local *local = sdata->local;
+        struct sk_buff *skb;
+        struct sta_info *sta;
+        const struct ieee80211_mgmt *mgmt = (void *)buf;
+        u32 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
+                    IEEE80211_TX_CTL_REQ_TX_STATUS;
+
+        /* Check that we are on the requested channel for transmission */
+        if (chan != local->tmp_channel &&
+            chan != local->oper_channel)
+                return -EBUSY;
+        if (channel_type_valid &&
+            (channel_type != local->tmp_channel_type &&
+             channel_type != local->_oper_channel_type))
+                return -EBUSY;
+
+        switch (sdata->vif.type) {
+        case NL80211_IFTYPE_ADHOC:
+                if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)
+                        break;
+                rcu_read_lock();
+                sta = sta_info_get(sdata, mgmt->da);
+                rcu_read_unlock();
+                if (!sta)
+                        return -ENOLINK;
+                break;
+        case NL80211_IFTYPE_STATION:
+                if (!(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
+                        flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+                break;
+        default:
+                return -EOPNOTSUPP;
+        }
+
+        skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
+        if (!skb)
+                return -ENOMEM;
+        skb_reserve(skb, local->hw.extra_tx_headroom);
+
+        memcpy(skb_put(skb, len), buf, len);
+
+        IEEE80211_SKB_CB(skb)->flags = flags;
+
+        skb->dev = sdata->dev;
+        ieee80211_tx_skb(sdata, skb);
+
+        *cookie = (unsigned long) skb;
+        return 0;
 }
 
 struct cfg80211_ops mac80211_config_ops = {