ieee802154: add short address helpers

This patch introduce some short address handling functionality into
ieee802154 headers.

Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <aar@pengutronix.de>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/linux/ieee802154.h

@@ -47,6 +47,7 @@
 #define IEEE802154_ADDR_SHORT_UNSPEC	0xfffe
 
 #define IEEE802154_EXTENDED_ADDR_LEN	8
+#define IEEE802154_SHORT_ADDR_LEN	2
 
 #define IEEE802154_LIFS_PERIOD		40
 #define IEEE802154_SIFS_PERIOD		12
@@ -289,6 +290,34 @@ static inline bool ieee802154_is_valid_extended_unicast_addr(__le64 addr)
 		!(addr & cpu_to_le64(0x0100000000000000ULL)));
 }
 
+/**
+ * ieee802154_is_broadcast_short_addr - check if short addr is broadcast
+ * @addr: short addr to check
+ */
+static inline bool ieee802154_is_broadcast_short_addr(__le16 addr)
+{
+	return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST));
+}
+
+/**
+ * ieee802154_is_unspec_short_addr - check if short addr is unspecified
+ * @addr: short addr to check
+ */
+static inline bool ieee802154_is_unspec_short_addr(__le16 addr)
+{
+	return (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC));
+}
+
+/**
+ * ieee802154_is_valid_src_short_addr - check if source short address is valid
+ * @addr: short addr to check
+ */
+static inline bool ieee802154_is_valid_src_short_addr(__le16 addr)
+{
+	return !(ieee802154_is_broadcast_short_addr(addr) ||
+		 ieee802154_is_unspec_short_addr(addr));
+}
+
 /**
  * ieee802154_random_extended_addr - generates a random extended address
  * @addr: extended addr pointer to place the random address

include/net/mac802154.h

@@ -287,6 +287,16 @@ static inline void ieee802154_le16_to_be16(void *be16_dst, const void *le16_src)
 	put_unaligned_be16(get_unaligned_le16(le16_src), be16_dst);
 }
 
+/**
+ * ieee802154_be16_to_le16 - copies and convert be16 to le16
+ * @le16_dst: le16 destination pointer
+ * @be16_src: be16 source pointer
+ */
+static inline void ieee802154_be16_to_le16(void *le16_dst, const void *be16_src)
+{
+	put_unaligned_le16(get_unaligned_be16(be16_src), le16_dst);
+}
+
 /**
  * ieee802154_alloc_hw - Allocate a new hardware device
  *