mac802154: monitor device support

Support for monitor device intended to capture all the network activity.
This interface could be used by networks sniffers and is already
supported by WireShark. That's a good test point to check that basic
MAC support works.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac802154/mac802154.h b/net/mac802154/mac802154.h
index 6227526..789d9c9 100644
--- a/net/mac802154/mac802154.h
+++ b/net/mac802154/mac802154.h
@@ -90,11 +90,16 @@
 
 #define MAC802154_MAX_XMIT_ATTEMPTS	3
 
+#define MAC802154_CHAN_NONE		(~(u8)0) /* No channel is assigned */
+
 extern struct ieee802154_reduced_mlme_ops mac802154_mlme_reduced;
 
 int mac802154_slave_open(struct net_device *dev);
 int mac802154_slave_close(struct net_device *dev);
 
+void mac802154_monitors_rx(struct mac802154_priv *priv, struct sk_buff *skb);
+void mac802154_monitor_setup(struct net_device *dev);
+
 netdev_tx_t mac802154_tx(struct mac802154_priv *priv, struct sk_buff *skb,
 			 u8 page, u8 chan);