cfg80211/mac80211: extensible frame processing

Allow userspace to register for more than just
action frames by giving the frame subtype, and
make it possible to use this in various modes
as well.

With some tweaks and some added functionality
this will, in the future, also be usable in AP
mode and be able to replace the cooked monitor
interface currently used in that case.

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

1 files changed, 37 insertions, 0 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 0afccda42a24..a53feac4618c 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -417,6 +417,41 @@ void ieee80211_napi_complete(struct ieee80211_hw *hw)
 }
 EXPORT_SYMBOL(ieee80211_napi_complete);
 
+/* There isn't a lot of sense in it, but you can transmit anything you like */
+static const struct ieee80211_txrx_stypes
+ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
+        [NL80211_IFTYPE_ADHOC] = {
+                .tx = 0xffff,
+                .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
+        },
+        [NL80211_IFTYPE_STATION] = {
+                .tx = 0xffff,
+                .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+                        BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+        },
+        [NL80211_IFTYPE_AP] = {
+                .tx = 0xffff,
+                .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+                        BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+                        BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+                        BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+                        BIT(IEEE80211_STYPE_AUTH >> 4) |
+                        BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+                        BIT(IEEE80211_STYPE_ACTION >> 4),
+        },
+        [NL80211_IFTYPE_AP_VLAN] = {
+                /* copy AP */
+                .tx = 0xffff,
+                .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+                        BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+                        BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+                        BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+                        BIT(IEEE80211_STYPE_AUTH >> 4) |
+                        BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+                        BIT(IEEE80211_STYPE_ACTION >> 4),
+        },
+};
+
 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
                                         const struct ieee80211_ops *ops)
 {
@@ -446,6 +481,8 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
         if (!wiphy)
                 return NULL;
 
+        wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
+
         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
                         WIPHY_FLAG_4ADDR_AP |
                         WIPHY_FLAG_4ADDR_STATION;