sfr.h File Reference

6LoWPAN selective fragment recovery dispatch type and helper function definitions. More...

Detailed Description

6LoWPAN selective fragment recovery dispatch type and helper function definitions.

Author

Martine Lenders m.len.nosp@m.ders.nosp@m.@fu-b.nosp@m.erli.nosp@m.n.de

Definition in file sfr.h.

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include "bitfield.h"
#include "byteorder.h"
#include "net/sixlowpan.h"

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Data Structures
struct	sixlowpan_sfr_t
	Generic type for selective fragment recovery headers. More...
struct	sixlowpan_sfr_rfrag_t
	Recoverable fragment header. More...
struct	sixlowpan_sfr_ack_t
	Recoverable fragment (RFRAG) acknowledgment header. More...

Macros
#define	SIXLOWPAN_SFR_GEN_DISP_MASK   (0xfc)
	Mask for generic dispatch of both selective fragment recovery headers.
#define	SIXLOWPAN_SFR_GEN_DISP   (0xe8)
	generic dispatch for both SFR headers
#define	SIXLOWPAN_SFR_ECN   (0x01U)
	explicit congestion notification flag
#define	SIXLOWPAN_SFR_ACK_REQ   (0x80U)
	Acknowledgment request flag (for 8 MSB)
#define	SIXLOWPAN_SFR_SEQ_MASK   (0x7cU)
	Sequence number mask (for 8 MSB)
#define	SIXLOWPAN_SFR_SEQ_POS   (2U)
	Sequence number position (for 8 MSB)
#define	SIXLOWPAN_SFR_SEQ_MAX   (0x1fU)
	Maximum value for sequence number.
#define	SIXLOWPAN_SFR_FRAG_SIZE_MASK   (0x03ffU)
	Fragment size mask.
#define	SIXLOWPAN_SFR_FRAG_SIZE_MAX   (0x03ffU)
	Maximum value for fragment size.
#define	SIXLOWPAN_SFR_ACK_BITMAP_SIZE   (32U)
	Acknowledgment bitmap size in bits.

Functions
static bool	sixlowpan_sfr_is (sixlowpan_sfr_t *hdr)
	Check if given header is a 6LoWPAN selective fragment recovery header (either RFRAG or RFRAG ACK)
static void	sixlowpan_sfr_set_ecn (sixlowpan_sfr_t *hdr)
	Set the ECN flag in a 6LoWPAN selective fragment recovery header.
static void	sixlowpan_sfr_clear_ecn (sixlowpan_sfr_t *hdr)
	Clear the ECN flag in a 6LoWPAN recoverable fragment header.
static bool	sixlowpan_sfr_ecn (const sixlowpan_sfr_t *hdr)
	Check if the ECN flag in a 6LoWPAN recoverable fragment header is set.
static void	sixlowpan_sfr_rfrag_set_disp (sixlowpan_sfr_t *hdr)
	Initialize 6LoWPAN recoverable fragment dispatch.
static bool	sixlowpan_sfr_rfrag_is (const sixlowpan_sfr_t *hdr)
	Check if given header is a 6LoWPAN recoverable fragment header.
static void	sixlowpan_sfr_rfrag_set_ack_req (sixlowpan_sfr_rfrag_t *hdr)
	Set the Acknowledgment request flag in a 6LoWPAN recoverable fragment header.
static void	sixlowpan_sfr_rfrag_clear_ack_req (sixlowpan_sfr_rfrag_t *hdr)
	Clear the Acknowledgment request flag in a 6LoWPAN recoverable fragment header.
static bool	sixlowpan_sfr_rfrag_ack_req (sixlowpan_sfr_rfrag_t *hdr)
	Check if the Acknowledgment request flag in a 6LoWPAN recoverable fragment header is set.
static void	sixlowpan_sfr_rfrag_set_seq (sixlowpan_sfr_rfrag_t *hdr, uint8_t seq)
	Set sequence number in a 6LoWPAN recoverable fragment header.
static uint8_t	sixlowpan_sfr_rfrag_get_seq (const sixlowpan_sfr_rfrag_t *hdr)
	Get sequence number from a 6LoWPAN recoverable fragment header.
static void	sixlowpan_sfr_rfrag_set_frag_size (sixlowpan_sfr_rfrag_t *hdr, uint16_t frag_size)
	Set fragment size in a 6LoWPAN recoverable fragment header.
static uint16_t	sixlowpan_sfr_rfrag_get_frag_size (const sixlowpan_sfr_rfrag_t *hdr)
	Get fragment size from a 6LoWPAN recoverable fragment header.
static void	sixlowpan_sfr_rfrag_set_offset (sixlowpan_sfr_rfrag_t *hdr, uint16_t offset)
	Set fragment offset in a 6LoWPAN recoverable fragment header.
static uint16_t	sixlowpan_sfr_rfrag_get_offset (const sixlowpan_sfr_rfrag_t *hdr)
	Get fragment offset from a 6LoWPAN recoverable fragment header.
static void	sixlowpan_sfr_ack_set_disp (sixlowpan_sfr_t *hdr)
	Initialize 6LoWPAN RFRAG acknowledgment dispatch.
static bool	sixlowpan_sfr_ack_is (const sixlowpan_sfr_t *hdr)
	Check if given header is a 6LoWPAN RFRAG acknowledgment header.