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ieee802154: add helpers for frame control checks

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This patch introduce two static inline functions. The first to get the
frame control field from an sk_buff. The second is for checking on the
acknowledgment request bit on the frame control field. Later we can
introduce more functions to check on the frame control fields.

These will deprecate the current behaviour which requires a
host-byteorder conversion and manually bit handling.

Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2015-09-21 11:24:33 +02:00 committed by Marcel Holtmann
parent ab40ff7508
commit 79750ac425
1 changed files with 12 additions and 0 deletions
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12
include/linux/ieee802154.h
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@ -25,6 +25,8 @@
#include <linux/types.h>
#include <linux/random.h>
#include <linux/skbuff.h>
#include <linux/unaligned/memmove.h>
#include <asm/byteorder.h>
#define IEEE802154_MTU 127
@ -218,6 +220,7 @@ enum {
/* frame control handling */
#define IEEE802154_FCTL_FTYPE 0x0003
#define IEEE802154_FCTL_ACKREQ 0x0020
#define IEEE802154_FCTL_INTRA_PAN 0x0040
#define IEEE802154_FTYPE_DATA 0x0001
@ -232,6 +235,15 @@ static inline int ieee802154_is_data(__le16 fc)
cpu_to_le16(IEEE802154_FTYPE_DATA);
}
/**
* ieee802154_is_ackreq - check if acknowledgment request bit is set
* @fc: frame control bytes in little-endian byteorder
*/
static inline bool ieee802154_is_ackreq(__le16 fc)
{
return fc & cpu_to_le16(IEEE802154_FCTL_ACKREQ);
}
/**
* ieee802154_is_intra_pan - check if intra pan id communication
* @fc: frame control bytes in little-endian byteorder