6LoWPAN dispatch type and helper function definitions. More...

Detailed Description

6LoWPAN dispatch type and helper function definitions.

Author: Martine Lenders mlend.nosp@m.ers@.nosp@m.inf.f.nosp@m.u-be.nosp@m.rlin..nosp@m.de

Definition in file sixlowpan.h.

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "byteorder.h"

Include dependency graph for sixlowpan.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	sixlowpan_frag_t
	General and 1st 6LoWPAN fragmentation header. More...

struct	sixlowpan_frag_n_t
	Subsequent 6LoWPAN fragmentation header. More...

Functions
void	sixlowpan_print (uint8_t *data, size_t size)
	Prints 6LoWPAN dispatch to stdout.

6LoWPAN dispatch definition
See also RFC 4944, section 5.1
#define	SIXLOWPAN_UNCOMP (0x41)
	uncompressed 6LoWPAN frame dispatch.

#define	SIXLOWPAN_FRAG_DISP_MASK (0xf8)
	mask for fragmentation dispatch

#define	SIXLOWPAN_FRAG_1_DISP (0xc0)
	dispatch for 1st fragment

#define	SIXLOWPAN_FRAG_N_DISP (0xe0)
	dispatch for subsequent fragments

#define	SIXLOWPAN_FRAG_MAX_LEN (2047)
	Maximum datagram size $(2^{11} - 1)$ .

#define	SIXLOWPAN_IPHC1_DISP_MASK (0xe0)
	Dispatch mask for LOWPAN_IPHC.

#define	SIXLOWPAN_IPHC1_DISP (0x60)
	Dispatch for LOWPAN_IPHC.

#define	SIXLOWPAN_SFR_DISP_MASK (0xfe)
	Dispatch mask for 6LoWPAN selective fragment recovery.

#define	SIXLOWPAN_SFR_RFRAG_DISP (0xe8)
	Dispatch for 6LoWPAN recoverable fragment.

#define	SIXLOWPAN_SFR_ACK_DISP (0xea)
	Dispatch for 6LoWPAN recoverable fragment acknowledgment.

static bool	sixlowpan_nalp (uint8_t disp)
	Checks if dispatch indicates that frame is not a 6LoWPAN (NALP) frame.

6LoWPAN fragmentation header definitions
#define	SIXLOWPAN_FRAG_SIZE_MASK (0x07ff)
	mask for datagram size

static bool	sixlowpan_frag_1_is (sixlowpan_frag_t *hdr)
	Checks if a given header is a 1st 6LoWPAN fragment header.

static bool	sixlowpan_frag_n_is (sixlowpan_frag_t *hdr)
	Checks if a given header is a subsequent 6LoWPAN fragment header.

static bool	sixlowpan_frag_is (sixlowpan_frag_t *hdr)
	Checks if a given header is a 6LoWPAN fragment header.

static uint16_t	sixlowpan_frag_datagram_size (sixlowpan_frag_t *hdr)
	Get datagram size from general 6LoWPAN fragment header.

static uint16_t	sixlowpan_frag_datagram_tag (sixlowpan_frag_t *hdr)
	Get datagram tag from general 6LoWPAN fragment header.

static uint16_t	sixlowpan_frag_offset (sixlowpan_frag_n_t *hdr)
	Get fragment offset from a subsequent 6LoWPAN fragment header.

6LoWPAN IPHC dispatch definitions
#define	SIXLOWPAN_IPHC1_TF (0x18)
	Flag for Traffic Class & Flow Label elision (part of first byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC1_NH (0x04)
	Flag for Next Header Compression (part of first byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC1_HL (0x03)
	Flag for Hop Limit elision (part of first byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC2_CID_EXT (0x80)
	Flag for Context Identifier Extension (part of second byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC2_SAC (0x40)
	Flag for Source Address Compression (part of second byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC2_SAM (0x30)
	Bits for Source Address Mode (part of second byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC2_DAC (0x04)
	Flag for Destination Address Compression (part of second byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC2_DAM (0x03)
	Bits for Destination Address Mode (part of second byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC2_M (0x08)
	Flag for Multicast Compression (part of second byte of LOWPAN_IPHC).

#define	SIXLOWPAN_IPHC_HDR_LEN (2)
	6LoWPAN IPHC header length

#define	SIXLOWPAN_IPHC_CID_EXT_LEN (1)
	6LoWPAN context identifier extension header length

static bool	sixlowpan_iphc_is (uint8_t *data)
	Checks if datagram is an IPHC datagram.

Data Structures