Reactive Discovery of P2P Routes in LLNs

Implementation of P2P-RPL. More...

Detailed Description

Implementation of P2P-RPL.

See also

RFC 6997

Files
file	p2p.h
	Definititions for P2P-RPL.
file	p2p_dodag.h
	DODAG-related functions for P2P-RPL.
file	p2p_structs.h
	P2P-RPL data structs.

Macros
#define	GNRC_RPL_P2P_MOP   (0x04)
	P2P-RPL Mode of Operation.
#define	GNRC_RPL_P2P_LIFETIME   (0x02)
	Default lifetime of the P2P-RPL DODAG, encoded.
#define	GNRC_RPL_P2P_COMPR   (0)
	Number of elided prefix octets from the target field and address vector.
#define	GNRC_RPL_P2P_MAX_RANK   (0)
	Maximum rank in the DODAG during the route discovery.
#define	GNRC_RPL_P2P_OPT_RDO   (0x0A)
	P2P-RPL RDO DIO option type.
#define	GNRC_RPL_P2P_ICMPV6_CODE_DRO   (0x04)
	DRO ICMPv6 code.
#define	GNRC_RPL_P2P_ICMPV6_CODE_DRO_ACK   (0x05)
	DRO-ACK ICMPv6 code.
#define	GNRC_RPL_P2P_DRO_DELAY   (4)
	Time in seconds to wait before sending a DRO.
#define	GNRC_RPL_P2P_MSG_TYPE_DRO_HANDLE   (0x09A0)
	Message type for handling DRO sending.

Functions
gnrc_rpl_instance_t *	gnrc_rpl_p2p_root_init (uint8_t instance_id, ipv6_addr_t *dodag_id, ipv6_addr_t *target, bool gen_inst_id)
	Initialization of a P2P-RPL Instance as root node.
gnrc_pktsnip_t *	gnrc_rpl_p2p_rdo_build (gnrc_pktsnip_t *pkt, gnrc_rpl_p2p_ext_t *p2p_ext)
	Build an RDO.
void	gnrc_rpl_p2p_rdo_parse (gnrc_rpl_p2p_opt_rdo_t *rdo, gnrc_rpl_p2p_ext_t *p2p_ext)
	Parse an RDO.
void	gnrc_rpl_p2p_send_DRO (gnrc_pktsnip_t *pkt, gnrc_rpl_p2p_ext_t *p2p_ext)
	Send a DRO control message.
void	gnrc_rpl_p2p_recv_DRO (gnrc_pktsnip_t *pkt, ipv6_addr_t *src)
	Receive and parse a DRO control message.
void	gnrc_rpl_p2p_update (void)
	Updates the lifetime of the P2P Dodag and the delay of the DRO.

Variables
const uint8_t	gnrc_rpl_p2p_lifetime_lookup [4]
	Lookup table used to decode/encode the lifetime values.

Trickle parameters
See also RFC 6997, section 6.1, Setting a P2P Mode DIO
#define	GNRC_RPL_P2P_DEFAULT_DIO_INTERVAL_MIN   (6)
#define	GNRC_RPL_P2P_DEFAULT_DIO_REDUNDANCY_CONSTANT   (1)

Default parent and route entry lifetime
default lifetime will be multiplied by the lifetime unit to obtain the resulting lifetime
#define	GNRC_RPL_P2P_DEFAULT_LIFETIME   (0xFF)
#define	GNRC_RPL_P2P_LIFETIME_UNIT   (0xFFFF)

Macro Definition Documentation

GNRC_RPL_P2P_COMPR

#define GNRC_RPL_P2P_COMPR   (0)

Number of elided prefix octets from the target field and address vector.

See also

RFC 6997, section 7, P2P Route Discovery Option (P2P-RDO)

Definition at line 54 of file p2p.h.

GNRC_RPL_P2P_DEFAULT_DIO_INTERVAL_MIN

#define GNRC_RPL_P2P_DEFAULT_DIO_INTERVAL_MIN   (6)

Definition at line 71 of file p2p.h.

GNRC_RPL_P2P_DEFAULT_DIO_REDUNDANCY_CONSTANT

#define GNRC_RPL_P2P_DEFAULT_DIO_REDUNDANCY_CONSTANT   (1)

Definition at line 72 of file p2p.h.

GNRC_RPL_P2P_DEFAULT_LIFETIME

#define GNRC_RPL_P2P_DEFAULT_LIFETIME   (0xFF)

Definition at line 80 of file p2p.h.

GNRC_RPL_P2P_DRO_DELAY

#define GNRC_RPL_P2P_DRO_DELAY   (4)

Time in seconds to wait before sending a DRO.

Definition at line 111 of file p2p.h.

GNRC_RPL_P2P_ICMPV6_CODE_DRO

#define GNRC_RPL_P2P_ICMPV6_CODE_DRO   (0x04)

DRO ICMPv6 code.

See also

RFC 6997, section 8, The P2P Discovery Reply Object (P2P-DRO)

Definition at line 98 of file p2p.h.

GNRC_RPL_P2P_ICMPV6_CODE_DRO_ACK

#define GNRC_RPL_P2P_ICMPV6_CODE_DRO_ACK   (0x05)

DRO-ACK ICMPv6 code.

See also

RFC 6997, section 10, The P2P Discovery Reply Object Acknowledgement (P2P-DRO-ACK)

Definition at line 106 of file p2p.h.

GNRC_RPL_P2P_LIFETIME

#define GNRC_RPL_P2P_LIFETIME   (0x02)

Default lifetime of the P2P-RPL DODAG, encoded.

See also

RFC 6997, section 7, P2P Route Discovery Option (P2P-RDO)

Definition at line 46 of file p2p.h.

GNRC_RPL_P2P_LIFETIME_UNIT

#define GNRC_RPL_P2P_LIFETIME_UNIT   (0xFFFF)

Definition at line 81 of file p2p.h.

GNRC_RPL_P2P_MAX_RANK

#define GNRC_RPL_P2P_MAX_RANK   (0)

Maximum rank in the DODAG during the route discovery.

See also

RFC 6997, section 7, P2P Route Discovery Option (P2P-RDO)

Definition at line 62 of file p2p.h.

GNRC_RPL_P2P_MOP

#define GNRC_RPL_P2P_MOP   (0x04)

P2P-RPL Mode of Operation.

Definition at line 38 of file p2p.h.

GNRC_RPL_P2P_MSG_TYPE_DRO_HANDLE

#define GNRC_RPL_P2P_MSG_TYPE_DRO_HANDLE   (0x09A0)

Message type for handling DRO sending.

Definition at line 116 of file p2p.h.

GNRC_RPL_P2P_OPT_RDO

#define GNRC_RPL_P2P_OPT_RDO   (0x0A)

P2P-RPL RDO DIO option type.

See also

RFC 6997, section 7, P2P Route Discovery Option (P2P-RDO)

Definition at line 90 of file p2p.h.

Function Documentation

gnrc_rpl_p2p_rdo_build()

gnrc_pktsnip_t * gnrc_rpl_p2p_rdo_build	(	gnrc_pktsnip_t *	pkt,
		gnrc_rpl_p2p_ext_t *	p2p_ext
	)

Build an RDO.

Parameters

[in,out]	pkt	The RDO will be added to the pkt
[in]	p2p_ext	Pointer to the P2P-RPL DODAG extension

gnrc_rpl_p2p_rdo_parse()

void gnrc_rpl_p2p_rdo_parse	(	gnrc_rpl_p2p_opt_rdo_t *	rdo,
		gnrc_rpl_p2p_ext_t *	p2p_ext
	)

Parse an RDO.

Parameters

[in]	rdo	The RDO to parse from.
[in]	p2p_ext	Pointer to the P2P-RPL DODAG extension

gnrc_rpl_p2p_recv_DRO()

void gnrc_rpl_p2p_recv_DRO	(	gnrc_pktsnip_t *	pkt,
		ipv6_addr_t *	src
	)

Receive and parse a DRO control message.

Parameters

[in]	pkt	The ICMPv6 packet to parse.
[in]	src	The source address of the IPv6 packet.

gnrc_rpl_p2p_root_init()

gnrc_rpl_instance_t * gnrc_rpl_p2p_root_init	(	uint8_t	instance_id,
		ipv6_addr_t *	dodag_id,
		ipv6_addr_t *	target,
		bool	gen_inst_id
	)

Initialization of a P2P-RPL Instance as root node.

Parameters

[in]	instance_id	Id of the instance
[in]	dodag_id	Id of the DODAG
[in]	target	Target of the P2P-RPL routes discovery
[in]	gen_inst_id	Flag indicating whether to generate a local instance id. If true, instance_id will be ignored

Returns

Pointer to the new Instance, on success.

NULL, otherwise.

gnrc_rpl_p2p_send_DRO()

void gnrc_rpl_p2p_send_DRO	(	gnrc_pktsnip_t *	pkt,
		gnrc_rpl_p2p_ext_t *	p2p_ext
	)

Send a DRO control message.

Parameters

[in]	pkt	The ICMPv6 packet to send. Can be NULL.
[in]	p2p_ext	Pointer to the P2P-RPL DODAG extension