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6LoWPAN Neighbor Discovery
Networking » 6LoWPAN

Message types and helper functions for Neighbor Discovery Optimization for 6LoWPAN (6LoWPAN-ND) More...

Detailed Description

Message types and helper functions for Neighbor Discovery Optimization for 6LoWPAN (6LoWPAN-ND)

See also
RFC 6775, section 4

Files

file  nd.h
 Message type and helper function definitions for 6LoWPAN-ND.
 

Data Structures

struct  sixlowpan_nd_da_t
 Duplicate address request and confirmation message format. More...
 
struct  sixlowpan_nd_opt_ar_t
 Address registration option format. More...
 
struct  sixlowpan_nd_opt_6ctx_t
 6LoWPAN context option format More...
 
struct  sixlowpan_nd_opt_abr_t
 Authoritative border router option format. More...
 

Functions

static bool sixlowpan_nd_opt_6ctx_is_comp (const sixlowpan_nd_opt_6ctx_t *ctx_opt)
 Checks if a 6LoWPAN context in an 6LoWPAN context option is valid for compression.
 
static uint8_t sixlowpan_nd_opt_6ctx_get_cid (const sixlowpan_nd_opt_6ctx_t *ctx_opt)
 Gets a CID (context identifier) from a 6LoWPAN context option.
 
static void sixlowpan_nd_opt_6ctx_set_cid (sixlowpan_nd_opt_6ctx_t *ctx_opt, uint8_t cid)
 Sets a CID (context identifier) for a 6LoWPAN context option.
 
static uint32_t sixlowpan_nd_opt_abr_get_version (const sixlowpan_nd_opt_abr_t *abr_opt)
 Gets the version in correct order from an Authoritative Border Router option.
 
static void sixlowpan_nd_opt_abr_set_version (sixlowpan_nd_opt_abr_t *abr_opt, uint32_t version)
 Sets the version of an Authoritative Border Router option.
 
static uint16_t gnrc_sixlowpan_nd_opt_get_ltime (const sixlowpan_nd_opt_abr_t *abr_opt)
 Get the lifetime of an Authoritative Border Router from an ABR option.
 

Lengths for fixed length options

Note
Options don't use bytes as their length unit, but 8 bytes.
#define SIXLOWPAN_ND_OPT_6CTX_LEN_MIN   (2U)
 
#define SIXLOWPAN_ND_OPT_6CTX_LEN_MAX   (3U)
 
#define SIXLOWPAN_ND_OPT_AR_LEN   (2U)
 
#define SIXLOWPAN_ND_OPT_ABR_LEN   (3U)
 

Authoritative border router option constants

See also
RFC 6775, section 4.3
#define SIXLOWPAN_ND_OPT_ABR_LTIME_DEFAULT   (10000U)
 Valid lifetime (in minutes) assumed if sixlowpan_nd_opt_abr_t::ltime is 0.
 

Status values for address registration option and DARs

See also
RFC 6775, section 4.1
#define SIXLOWPAN_ND_STATUS_SUCCESS   (0)
 success
 
#define SIXLOWPAN_ND_STATUS_DUP   (1)
 duplicate address
 
#define SIXLOWPAN_ND_STATUS_NC_FULL   (2)
 neighbor cache full
 

Flags for 6LoWPAN context option

#define SIXLOWPAN_ND_OPT_6CTX_FLAGS_MASK   (0x1f)
 
#define SIXLOWPAN_ND_OPT_6CTX_FLAGS_C   (0x10)
 valid for compression
 
#define SIXLOWPAN_ND_OPT_6CTX_FLAGS_CID_MASK   (0x0f)
 mask for CID
 

6LoWPAN border router constants

See also
RFC 6775, section 9
#define SIXLOWPAN_ND_MIN_CTX_CHANGE_SEC_DELAY   (300U)
 MIN_CONTEXT_CHANGE_DELAY (in sec)
 

6LoWPAN router constants

See also
RFC 6775, section 9
#define SIXLOWPAN_ND_MAX_RA_NUMOF   (3U)
 MAX_RTR_ADVERTISEMENTS.
 
#define SIXLOWPAN_ND_MIN_MS_DELAY_BETWEEN_RAS   (10000U)
 MIN_DELAY_BETWEEN_RAS (in ms)
 
#define SIXLOWPAN_ND_MAX_RA_MS_DELAY   (2000U)
 MAX_RA_DELAY_TIME (in ms)
 
#define SIXLOWPAN_ND_TENTATIVE_NCE_SEC_LTIME   (20U)
 TENTATIVE_NCE_LIFETIME (in sec)
 

Router constants

See also
RFC 6775, section 9
#define SIXLOWPAN_ND_MULTIHOP_HL   (64U)
 MULTIHOP_HOPLIMIT.
 

Host constants

See also
RFC 6775, section 9
#define SIXLOWPAN_ND_REG_TRANSMIT_NUMOF   (3U)
 Number of address registration retries.
 
#define SIXLOWPAN_ND_RS_MSEC_INTERVAL   (10000U)
 RTR_SOLICITATION_INTERVAL (in msec)
 
#define SIXLOWPAN_ND_MAX_RS_NUMOF   (3U)
 MAX_RTR_SOLICITATIONS.
 
#define SIXLOWPAN_ND_MAX_RS_SEC_INTERVAL   (60U)
 MAX_RTR_SOLICITATIONS_INTERVAL (in seconds)
 

Macro Definition Documentation

◆ SIXLOWPAN_ND_MAX_RA_MS_DELAY

#define SIXLOWPAN_ND_MAX_RA_MS_DELAY   (2000U)

MAX_RA_DELAY_TIME (in ms)

Definition at line 99 of file nd.h.

◆ SIXLOWPAN_ND_MAX_RA_NUMOF

#define SIXLOWPAN_ND_MAX_RA_NUMOF   (3U)

MAX_RTR_ADVERTISEMENTS.

Definition at line 97 of file nd.h.

◆ SIXLOWPAN_ND_MAX_RS_NUMOF

#define SIXLOWPAN_ND_MAX_RS_NUMOF   (3U)

MAX_RTR_SOLICITATIONS.

Definition at line 128 of file nd.h.

◆ SIXLOWPAN_ND_MAX_RS_SEC_INTERVAL

#define SIXLOWPAN_ND_MAX_RS_SEC_INTERVAL   (60U)

MAX_RTR_SOLICITATIONS_INTERVAL (in seconds)

Definition at line 132 of file nd.h.

◆ SIXLOWPAN_ND_MIN_CTX_CHANGE_SEC_DELAY

#define SIXLOWPAN_ND_MIN_CTX_CHANGE_SEC_DELAY   (300U)

MIN_CONTEXT_CHANGE_DELAY (in sec)

Definition at line 89 of file nd.h.

◆ SIXLOWPAN_ND_MIN_MS_DELAY_BETWEEN_RAS

#define SIXLOWPAN_ND_MIN_MS_DELAY_BETWEEN_RAS   (10000U)

MIN_DELAY_BETWEEN_RAS (in ms)

Definition at line 98 of file nd.h.

◆ SIXLOWPAN_ND_MULTIHOP_HL

#define SIXLOWPAN_ND_MULTIHOP_HL   (64U)

MULTIHOP_HOPLIMIT.

Definition at line 108 of file nd.h.

◆ SIXLOWPAN_ND_OPT_6CTX_FLAGS_C

#define SIXLOWPAN_ND_OPT_6CTX_FLAGS_C   (0x10)

valid for compression

Definition at line 78 of file nd.h.

◆ SIXLOWPAN_ND_OPT_6CTX_FLAGS_CID_MASK

#define SIXLOWPAN_ND_OPT_6CTX_FLAGS_CID_MASK   (0x0f)

mask for CID

Definition at line 79 of file nd.h.

◆ SIXLOWPAN_ND_OPT_6CTX_FLAGS_MASK

#define SIXLOWPAN_ND_OPT_6CTX_FLAGS_MASK   (0x1f)

Definition at line 77 of file nd.h.

◆ SIXLOWPAN_ND_OPT_6CTX_LEN_MAX

#define SIXLOWPAN_ND_OPT_6CTX_LEN_MAX   (3U)

Definition at line 41 of file nd.h.

◆ SIXLOWPAN_ND_OPT_6CTX_LEN_MIN

#define SIXLOWPAN_ND_OPT_6CTX_LEN_MIN   (2U)

Definition at line 40 of file nd.h.

◆ SIXLOWPAN_ND_OPT_ABR_LEN

#define SIXLOWPAN_ND_OPT_ABR_LEN   (3U)

Definition at line 43 of file nd.h.

◆ SIXLOWPAN_ND_OPT_ABR_LTIME_DEFAULT

#define SIXLOWPAN_ND_OPT_ABR_LTIME_DEFAULT   (10000U)

Valid lifetime (in minutes) assumed if sixlowpan_nd_opt_abr_t::ltime is 0.

Definition at line 57 of file nd.h.

◆ SIXLOWPAN_ND_OPT_AR_LEN

#define SIXLOWPAN_ND_OPT_AR_LEN   (2U)

Definition at line 42 of file nd.h.

◆ SIXLOWPAN_ND_REG_TRANSMIT_NUMOF

#define SIXLOWPAN_ND_REG_TRANSMIT_NUMOF   (3U)

Number of address registration retries.

Note
Must not be greater than 7 for Generic (GNRC) network stack since GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_TENTATIVE restricts it to that number.

Definition at line 123 of file nd.h.

◆ SIXLOWPAN_ND_RS_MSEC_INTERVAL

#define SIXLOWPAN_ND_RS_MSEC_INTERVAL   (10000U)

RTR_SOLICITATION_INTERVAL (in msec)

Definition at line 127 of file nd.h.

◆ SIXLOWPAN_ND_STATUS_DUP

#define SIXLOWPAN_ND_STATUS_DUP   (1)

duplicate address

Definition at line 67 of file nd.h.

◆ SIXLOWPAN_ND_STATUS_NC_FULL

#define SIXLOWPAN_ND_STATUS_NC_FULL   (2)

neighbor cache full

Definition at line 68 of file nd.h.

◆ SIXLOWPAN_ND_STATUS_SUCCESS

#define SIXLOWPAN_ND_STATUS_SUCCESS   (0)

success

Definition at line 66 of file nd.h.

◆ SIXLOWPAN_ND_TENTATIVE_NCE_SEC_LTIME

#define SIXLOWPAN_ND_TENTATIVE_NCE_SEC_LTIME   (20U)

TENTATIVE_NCE_LIFETIME (in sec)

Definition at line 100 of file nd.h.

Function Documentation

◆ gnrc_sixlowpan_nd_opt_get_ltime()

static uint16_t gnrc_sixlowpan_nd_opt_get_ltime ( const sixlowpan_nd_opt_abr_t *  abr_opt)
inlinestatic

Get the lifetime of an Authoritative Border Router from an ABR option.

Parameters
[in]abr_optAn Authoritative Border Router option (ABRO).
Returns
The lifetime of abr_opt in minutes. If the lifetime is 0, SIXLOWPAN_ND_OPT_ABR_LTIME_DEFAULT is returned.

Definition at line 271 of file nd.h.

◆ sixlowpan_nd_opt_6ctx_get_cid()

static uint8_t sixlowpan_nd_opt_6ctx_get_cid ( const sixlowpan_nd_opt_6ctx_t *  ctx_opt)
inlinestatic

Gets a CID (context identifier) from a 6LoWPAN context option.

Parameters
[in]ctx_optA 6LoWPAN context option.
Returns
The CID in the 6LoWPAN context option ctx_opt.

Definition at line 219 of file nd.h.

◆ sixlowpan_nd_opt_6ctx_is_comp()

static bool sixlowpan_nd_opt_6ctx_is_comp ( const sixlowpan_nd_opt_6ctx_t *  ctx_opt)
inlinestatic

Checks if a 6LoWPAN context in an 6LoWPAN context option is valid for compression.

Parameters
[in]ctx_optA 6LoWPAN context option.
Returns
true, if C bit is set in ctx_opt.
false, if C bit is unset in ctx_opt.

Definition at line 207 of file nd.h.

◆ sixlowpan_nd_opt_6ctx_set_cid()

static void sixlowpan_nd_opt_6ctx_set_cid ( sixlowpan_nd_opt_6ctx_t *  ctx_opt,
uint8_t  cid 
)
inlinestatic

Sets a CID (context identifier) for a 6LoWPAN context option.

Parameters
[out]ctx_optA 6LoWPAN context option.
[in]cidThe CID for the 6LoWPAN context option.

Definition at line 230 of file nd.h.

◆ sixlowpan_nd_opt_abr_get_version()

static uint32_t sixlowpan_nd_opt_abr_get_version ( const sixlowpan_nd_opt_abr_t *  abr_opt)
inlinestatic

Gets the version in correct order from an Authoritative Border Router option.

Parameters
[in]abr_optAn Authoritative Border Router option (ABRO).
Returns
The version of the ABRO

Definition at line 244 of file nd.h.

◆ sixlowpan_nd_opt_abr_set_version()

static void sixlowpan_nd_opt_abr_set_version ( sixlowpan_nd_opt_abr_t *  abr_opt,
uint32_t  version 
)
inlinestatic

Sets the version of an Authoritative Border Router option.

Parameters
[in]abr_optAn Authoritative Border Router option (ABRO).
[in]versionVersion for the ABRO.

Definition at line 256 of file nd.h.