ieee802154: add ieee802154_skb_src_pan helper

This patch adds ieee802154_skb_src_pan function to get the pointer
address of the source pan id at skb mac pointer.

Signed-off-by: Alexander Aring <aar@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h
index 91f4665fea63..ddb890174a0e 100644
--- a/include/linux/ieee802154.h
+++ b/include/linux/ieee802154.h
@@ -50,6 +50,7 @@
 
 #define IEEE802154_EXTENDED_ADDR_LEN    8
 #define IEEE802154_SHORT_ADDR_LEN       2
+#define IEEE802154_PAN_ID_LEN           2
 
 #define IEEE802154_LIFS_PERIOD          40
 #define IEEE802154_SIFS_PERIOD          12
@@ -224,12 +225,15 @@ enum {
 #define IEEE802154_FCTL_SECEN           0x0004
 #define IEEE802154_FCTL_INTRA_PAN       0x0040
 #define IEEE802154_FCTL_DADDR           0x0c00
+#define IEEE802154_FCTL_SADDR           0xc000
 
 #define IEEE802154_FTYPE_DATA           0x0001
 
 #define IEEE802154_FCTL_ADDR_NONE       0x0000
 #define IEEE802154_FCTL_DADDR_SHORT     0x0800
 #define IEEE802154_FCTL_DADDR_EXTENDED  0x0c00
+#define IEEE802154_FCTL_SADDR_SHORT     0x8000
+#define IEEE802154_FCTL_SADDR_EXTENDED  0xc000
 
 /*
  * ieee802154_is_data - check if type is IEEE802154_FTYPE_DATA
@@ -277,6 +281,15 @@ static inline __le16 ieee802154_daddr_mode(__le16 fc)
         return fc & cpu_to_le16(IEEE802154_FCTL_DADDR);
 }
 
+/*
+ * ieee802154_saddr_mode - get saddr mode from fc
+ * @fc: frame control bytes in little-endian byteorder
+ */
+static inline __le16 ieee802154_saddr_mode(__le16 fc)
+{
+        return fc & cpu_to_le16(IEEE802154_FCTL_SADDR);
+}
+
 /**
  * ieee802154_is_valid_psdu_len - check if psdu len is valid
  * available lengths: