RPL-lite is a lightweight implementation of RPL tailored for reliability. More...

Files
file	rpl-conf.h
	Public configuration and API declarations for ContikiRPL.

file	rpl-const.h
	Constants for RPL.

file	rpl-dag-root.c
	DAG root utility functions for RPL.

file	rpl-dag-root.h
	DAG root utility functions for RPL.

file	rpl-dag.c
	Logic for Directed Acyclic Graphs in RPL.

file	rpl-dag.h
	Header file for rpl-dag module.

file	rpl-ext-header.c
	Management of extension headers for ContikiRPL.

file	rpl-ext-header.h
	Header file for rpl-ext-header.

file	rpl-icmp6.c
	ICMP6 I/O for RPL control messages.

file	rpl-icmp6.h
	Header file for rpl-ext-header.

file	rpl-mrhof.c
	The Minimum Rank with Hysteresis Objective Function (MRHOF), RFC6719.

file	rpl-neighbor.c
	Logic for DAG neighbors in RPL.

file	rpl-neighbor.h
	Header file for rpl-neighbor module.

file	rpl-of0.c
	An implementation of RPL's objective function 0, RFC6552.

file	rpl-timers.c
	RPL timer management.

file	rpl-timers.h
	Header file for rpl-timers module.

file	rpl-types.h
	RPL types and macros.

file	rpl.c
	ContikiRPL, an implementation of RPL: IPv6 Routing Protocol for Low-Power and Lossy Networks (IETF RFC 6550)

Data Structures
struct	rpl_metric_object_energy
	Structure for RPL energy metric. More...

struct	rpl_metric_container
	Logical representation of a DAG Metric Container. More...

struct	rpl_prefix
	RPL prefix information. More...

struct	rpl_nbr
	All information related to a RPL neighbor. More...

struct	rpl_of
	API for RPL objective functions (OF) More...

struct	rpl_dag
	RPL DAG structure. More...

struct	rpl_instance
	RPL instance structure. More...

Macros
#define	uip_create_linklocal_rplnodes_mcast(addr) uip_ip6addr((addr), 0xff02, 0, 0, 0, 0, 0, 0, 0x001a)
	Set IP address addr to the link-local, all-rpl-nodes multicast address.

#define	uip_is_addr_linklocal_rplnodes_mcast(addr)
	Is IPv6 address addr the link-local, all-RPL-nodes multicast address?

#define	RPL_LIFETIME(lifetime)
	Compute lifetime, accounting for the lifetime unit.

#define	ROOT_RANK curr_instance.min_hoprankinc
	Rank of a root node.

#define	DAG_RANK(fixpt_rank) ((fixpt_rank) / curr_instance.min_hoprankinc)
	Return DAG RANK as per RFC 6550 (rank divided by min_hoprankinc)

Enumerations
enum	rpl_dag_state
	RPL DAG states.

Functions
void	rpl_dag_root_print_links (const char *str)
	Prints a summary of all routing links.

void	rpl_dag_root_set_prefix (uip_ipaddr_t prefix, uip_ipaddr_t iid)
	Set a prefix in case the node is later set as dag root.

int	rpl_dag_root_start (void)
	Set the node as root and start a DAG.

int	rpl_dag_root_is_root (void)
	Tells whether we are DAG root or not.

const char *	rpl_dag_state_to_str (enum rpl_dag_state state)
	Returns a textual description of the current DAG state.

int	rpl_dag_get_root_ipaddr (uip_ipaddr_t *ipaddr)
	Returns the IPv6 address of the RPL DAG root, if any.

void	rpl_dag_leave (void)
	Leaves the current DAG.

void	rpl_dag_poison_and_leave (void)
	Start poisoning and leave the DAG after a delay.

void	rpl_dag_periodic (unsigned seconds)
	A function called periodically.

int	rpl_is_addr_in_our_dag (const uip_ipaddr_t *addr)
	Tells whether a given global IPv6 address is in our current DAG.

rpl_instance_t *	rpl_get_default_instance (void)
	Returns pointer to the default instance (for compatibility with legagy RPL code)

rpl_dag_t *	rpl_get_any_dag (void)
	Returns pointer to any DAG (for compatibility with legagy RPL code)

void	rpl_refresh_routes (const char *str)
	Triggers a route fresh via DTSN increment.

void	rpl_global_repair (const char *str)
	Triggers a RPL global repair.

void	rpl_local_repair (const char *str)
	Triggers a RPL local repair.

int	rpl_dag_ready_to_advertise (void)
	Tells whether RPL is ready to advertise the DAG.

void	rpl_dag_update_state (void)
	Updates RPL internal state: selects preferred parent, updates rank & metreic container, triggers control traffic accordingly and updates uIP6 internal state.

void	rpl_process_dio (uip_ipaddr_t from, rpl_dio_t dio)
	Processes incoming DIO.

void	rpl_process_dis (uip_ipaddr_t *from, int is_multicast)
	Processes incoming DIS.

void	rpl_process_dao (uip_ipaddr_t from, rpl_dao_t dao)
	Processes incoming DAO.

int	rpl_process_hbh (rpl_nbr_t *sender, uint16_t sender_rank, int loop_detected, int rank_error_signaled)
	Processes Hop-by-Hop (HBH) Extension Header of a packet currently being forwrded.

void	rpl_dag_init_root (uint8_t instance_id, uip_ipaddr_t dag_id, uip_ipaddr_t prefix, unsigned prefix_len, uint8_t flags)
	Initializes DAG internal structure for a root node.

void	rpl_dag_init (void)
	Initializes rpl-dag module.

void	rpl_process_dao_ack (uint8_t sequence, uint8_t status)
	Processes incoming DAO-ACK.

int	rpl_ext_header_srh_get_next_hop (uip_ipaddr_t *ipaddr)
	Look for next hop from SRH of current uIP packet.

int	rpl_ext_header_srh_update (void)
	Process and update SRH in-place, i.e.

int	rpl_ext_header_hbh_update (uint8_t *ext_buf, int opt_offset)
	Process and update the RPL hop-by-hop extension headers of the current uIP packet.

int	rpl_ext_header_update (void)
	Adds/updates all RPL extension headers to current uIP packet.

bool	rpl_ext_header_remove (void)
	Removes all RPL extension headers.

uip_ds6_nbr_t *	rpl_icmp6_update_nbr_table (uip_ipaddr_t from, nbr_table_reason_t reason, void data)
	Updates IPv6 neighbor cache on incoming link-local RPL ICMPv6 messages.

void	rpl_icmp6_dis_output (uip_ipaddr_t *addr)
	Creates an ICMPv6 DIS packet and sends it.

void	rpl_icmp6_dio_output (uip_ipaddr_t *uc_addr)
	Creates an ICMPv6 DIO packet and sends it.

void	rpl_icmp6_dao_output (uint8_t lifetime)
	Creates an ICMPv6 DAO packet and sends it to the root, advertising the current preferred parent, and with our global address as prefix.

void	rpl_icmp6_init (void)
	Initializes rpl-icmp6 module, registers ICMPv6 handlers for all RPL ICMPv6 messages: DIO, DIS, DAO and DAO-ACK.

void	rpl_icmp6_dao_ack_output (uip_ipaddr_t *dest, uint8_t sequence, uint8_t status)
	Creates an ICMPv6 DAO-ACK packet and sends it to the originator of the ACK.

int	rpl_neighbor_snprint (char buf, int buflen, rpl_nbr_t nbr)
	Print a textual description of RPL neighbor into a string.

void	rpl_neighbor_print_list (const char *str)
	Prints a summary of all RPL neighbors and their properties.

int	rpl_neighbor_count (void)
	Returns the number of nodes in the RPL neighbor table.

rpl_nbr_t *	rpl_neighbor_get_from_lladdr (uip_lladdr_t *addr)
	Returns a neighbor from its link-layer address.

int	rpl_neighbor_is_acceptable_parent (rpl_nbr_t *nbr)
	Tells whether a nbr is acceptable as per the OF's definition.

uint16_t	rpl_neighbor_get_link_metric (rpl_nbr_t *nbr)
	Returns a neighbor's link metric.

rpl_rank_t	rpl_neighbor_rank_via_nbr (rpl_nbr_t *nbr)
	Returns our rank if selecting a given parent as preferred parent.

const linkaddr_t *	rpl_neighbor_get_lladdr (rpl_nbr_t *nbr)
	Returns a neighbors's link-layer address.

uip_ipaddr_t *	rpl_neighbor_get_ipaddr (rpl_nbr_t *nbr)
	Returns a neighbor's (link-local) IPv6 address.

const struct link_stats *	rpl_neighbor_get_link_stats (rpl_nbr_t *nbr)
	Returns a neighbor's link statistics.

int	rpl_neighbor_is_fresh (rpl_nbr_t *nbr)
	Tells wether we have fresh link information towards a given neighbor.

int	rpl_neighbor_is_parent (rpl_nbr_t *nbr)
	Tells whether a neighbor is in the parent set.

void	rpl_neighbor_set_preferred_parent (rpl_nbr_t *nbr)
	Set current RPL preferred parent and update DS6 default route accordingly.

void	rpl_neighbor_remove_all (void)
	Empty the RPL neighbor table.

rpl_nbr_t *	rpl_neighbor_get_from_ipaddr (uip_ipaddr_t *addr)
	Returns a neighbor from its link-local IPv6 address.

rpl_nbr_t *	rpl_neighbor_select_best (void)
	Returns the best candidate for preferred parent.

void	rpl_neighbor_init (void)
	Initialize rpl-dag-neighbor module.

void	rpl_timers_schedule_periodic_dis (void)
	Schedule periodic DIS with a random delay based on RPL_DIS_INTERVAL, until we join a DAG.

void	rpl_timers_dio_reset (const char *str)
	Reset DIO Trickle timer.

void	rpl_timers_schedule_unicast_dio (rpl_nbr_t *target)
	Schedule unicast DIO with no delay.

void	rpl_timers_schedule_dao (void)
	Schedule a DAO with random delay based on RPL_DAO_DELAY.

void	rpl_timers_unschedule_leaving (void)
	Cancel scheduled leaving if any.

void	rpl_timers_schedule_leaving (void)
	Schedule leaving after RPL_DELAY_BEFORE_LEAVING.

void	rpl_timers_init (void)
	Initialize rpl-timers module.

void	rpl_timers_stop_dag_timers (void)
	Stop all timers related to the DAG.

void	rpl_timers_schedule_state_update (void)
	Schedule a state update ASAP.

void	rpl_timers_schedule_dao_ack (uip_ipaddr_t *target, uint16_t sequence)
	Schedule a DAO-ACK with no delay.

void	rpl_timers_notify_dao_ack (void)
	Let the rpl-timers module know that the last DAO was ACKed.

void	rpl_schedule_probing (void)
	Schedule probing with delay RPL_PROBING_DELAY_FUNC()

void	rpl_schedule_probing_now (void)
	Schedule probing within a few seconds.

static void	rpl_timers_unschedule_state_update (void)
	Cancelled any scheduled state update.

int	rpl_lollipop_greater_than (int a, int b)
	Greater-than function for a lollipop counter.

const uip_ipaddr_t *	rpl_get_global_address (void)
	Get one of the node's global addresses.

void	rpl_link_callback (const linkaddr_t *addr, int status, int numtx)
	Called by lower layers after every packet transmission.

int	rpl_has_joined (void)
	Tells whether the node has joined a network or not.

int	rpl_is_reachable (void)
	Get the RPL's best guess on if we are reachable via have downward route or not.

void	rpl_reset_prefix (rpl_prefix_t *last_prefix)
	Removes current prefx.

int	rpl_set_prefix_from_addr (uip_ipaddr_t *addr, unsigned len, uint8_t flags)
	Set prefix from an IPv6 address.

int	rpl_set_prefix (rpl_prefix_t *prefix)
	Set prefix from an prefix data structure (from DIO)

void	rpl_set_leaf_only (uint8_t value)
	Changes the value of the rpl_leaf_only flag, which determines if a node acts only as a leaf in the network.

uint8_t	rpl_get_leaf_only (void)
	Get the value of the rpl_leaf_only flag.

Detailed Description

RPL-lite is a lightweight implementation of RPL tailored for reliability.

Supports only non-storing mode, one instance and one DAG.

Function Documentation

◆ rpl_dag_get_root_ipaddr()

int rpl_dag_get_root_ipaddr ( uip_ipaddr_t * ipaddr )

Returns the IPv6 address of the RPL DAG root, if any.

Parameters

ipaddr A pointer where to copy the IP address of the DAG root

Returns: 1 if the root address was copied, 0 otherwise

Definition at line 89 of file rpl-dag.c.

References ipaddr, and uip_ipaddr_copy.

◆ rpl_dag_init_root()

void rpl_dag_init_root	(	uint8_t	instance_id,
		uip_ipaddr_t *	dag_id,
		uip_ipaddr_t *	prefix,
		unsigned	prefix_len,
		uint8_t	flags )

Initializes DAG internal structure for a root node.

Parameters

instance_id	The instance ID
dag_id	The DAG ID
prefix	The prefix
prefix_len	The prefix length
flags	The prefix flags (from DIO)

Definition at line 713 of file rpl-dag.c.

References rpl_dag_leave(), and rpl_timers_dio_reset().

Referenced by rpl_dag_root_start().

◆ rpl_dag_periodic()

void rpl_dag_periodic ( unsigned seconds )

A function called periodically.

Used to age the DAG (decrease lifetime and expire DAG accordingly)

Parameters

seconds The number of seconds elapsted since last call

Definition at line 138 of file rpl-dag.c.

References rpl_icmp6_dis_output(), rpl_neighbor_get_ipaddr(), and rpl_timers_schedule_state_update().

◆ rpl_dag_ready_to_advertise()

int rpl_dag_ready_to_advertise ( void )

Tells whether RPL is ready to advertise the DAG.

Returns: 1 is ready, 0 otherwise

Definition at line 255 of file rpl-dag.c.

Referenced by rpl_timers_dio_reset().

◆ rpl_dag_root_is_root()

int rpl_dag_root_is_root ( void )

Tells whether we are DAG root or not.

Returns: 1 if we are dag root, 0 otherwise

Definition at line 158 of file rpl-dag-root.c.

◆ rpl_dag_root_print_links()

void rpl_dag_root_print_links ( const char * str )

Prints a summary of all routing links.

Parameters

str	A descriptive text on the caller

Definition at line 54 of file rpl-dag-root.c.

References uip_sr_link_snprint(), uip_sr_node_head(), uip_sr_node_next(), and uip_sr_num_nodes().

◆ rpl_dag_root_set_prefix()

void rpl_dag_root_set_prefix	(	uip_ipaddr_t *	prefix,
		uip_ipaddr_t *	iid )

Set a prefix in case the node is later set as dag root.

Parameters

prefix	The prefix. If NULL, uip_ds6_default_prefix() is used instead
iid	The IID. If NULL, it will be built from uip_ds6_set_addr_iid.

Definition at line 113 of file rpl-dag-root.c.

◆ rpl_dag_root_start()

int rpl_dag_root_start ( void )

Set the node as root and start a DAG.

Returns: 0 in case of success, -1 otherwise

Definition at line 124 of file rpl-dag-root.c.

References ipaddr, rpl_dag_init_root(), rpl_dag_update_state(), rpl_get_global_address(), uip_ds6_if, and uip_is_addr_linklocal.

◆ rpl_dag_state_to_str()

const char * rpl_dag_state_to_str ( enum rpl_dag_state state )

Returns a textual description of the current DAG state.

Parameters

state The DAG state

Returns: The description string

Definition at line 72 of file rpl-dag.c.

Referenced by rpl_neighbor_print_list().

◆ rpl_ext_header_hbh_update()

int rpl_ext_header_hbh_update	(	uint8_t *	ext_buf,
		int	opt_offset )

Process and update the RPL hop-by-hop extension headers of the current uIP packet.

Parameters

ext_buf	A pointer to the ext header buffer
opt_offset	The offset within the extension header where the option starts

Returns: 1 in case the packet is valid and to be processed further, 0 in case the packet must be dropped.

Definition at line 387 of file rpl-ext-header.c.

References rpl_process_hbh(), UIP_HTONS, and UIP_IP_BUF.

◆ rpl_ext_header_remove()

bool rpl_ext_header_remove ( void )

Removes all RPL extension headers.

Returns: true in case of success, false otherwise

Definition at line 545 of file rpl-ext-header.c.

References uip_buf, UIP_IP_BUF, uip_len, and UIP_PROTO_HBHO.

◆ rpl_ext_header_srh_get_next_hop()

int rpl_ext_header_srh_get_next_hop ( uip_ipaddr_t * ipaddr )

Look for next hop from SRH of current uIP packet.

Parameters

ipaddr A pointer to the address where to store the next hop.

Returns: 1 if a next hop was found, 0 otherwise

Definition at line 58 of file rpl-ext-header.c.

References ipaddr, rpl_is_addr_in_our_dag(), uip_buf, UIP_IP_BUF, uip_ipaddr_copy, uip_len, and uip_sr_get_node().

◆ rpl_ext_header_srh_update()

int rpl_ext_header_srh_update ( void )

Process and update SRH in-place, i.e.

internal address swapping as per RFC6554

Returns: 1 if SRH found, 0 otherwise

Definition at line 155 of file rpl-ext-header.c.

References uip_buf, UIP_BUFSIZE, UIP_IP_BUF, uip_ipaddr_copy, and uip_len.

◆ rpl_ext_header_update()

int rpl_ext_header_update ( void )

Adds/updates all RPL extension headers to current uIP packet.

Returns: 1 in case of success, 0 otherwise

Definition at line 517 of file rpl-ext-header.c.

References uip_ds6_if, UIP_IP_BUF, uip_is_addr_linklocal, and uip_is_addr_mcast.

◆ rpl_get_any_dag()

rpl_dag_t * rpl_get_any_dag ( void )

Returns pointer to any DAG (for compatibility with legagy RPL code)

Returns: A pointer to the only supported DAG

Definition at line 171 of file rpl-dag.c.

◆ rpl_get_default_instance()

rpl_instance_t * rpl_get_default_instance ( void )

Returns pointer to the default instance (for compatibility with legagy RPL code)

Returns: A pointer to the only supported instance

Definition at line 165 of file rpl-dag.c.

◆ rpl_get_global_address()

const uip_ipaddr_t * rpl_get_global_address ( void )

Get one of the node's global addresses.

Returns: A (constant) pointer to the global IPv6 address found. The pointer directs to the internals of DS6, should only be used in the current function's local scope

Definition at line 71 of file rpl.c.

References ipaddr, uip_ds6_if, and uip_is_addr_linklocal.

Referenced by rpl_dag_root_start(), rpl_icmp6_dao_output(), and rpl_neighbor_print_list().

◆ rpl_get_leaf_only()

uint8_t rpl_get_leaf_only ( void )

Get the value of the rpl_leaf_only flag.

Returns: The value of the rpl_leaf_only flag

Definition at line 242 of file rpl.c.

Referenced by rpl_icmp6_dio_output(), and rpl_timers_dio_reset().

◆ rpl_global_repair()

void rpl_global_repair ( const char * str )

Triggers a RPL global repair.

Parameters

str	A textual description of the cause for triggering a repair

Definition at line 204 of file rpl-dag.c.

References rpl_neighbor_print_list().

◆ rpl_has_joined()

int rpl_has_joined ( void )

Tells whether the node has joined a network or not.

Return values

1	if we have joined a network, 0 if not.

Definition at line 121 of file rpl.c.

◆ rpl_icmp6_dao_ack_output()

void rpl_icmp6_dao_ack_output	(	uip_ipaddr_t *	dest,
		uint8_t	sequence,
		uint8_t	status )

Creates an ICMPv6 DAO-ACK packet and sends it to the originator of the ACK.

Parameters

dest	The DAO-ACK destination (was source of the DAO)
sequence	The sequence number of the DAO being ACKed
status	The status of the DAO-ACK (see RPL_DAO_ACK_* defines)

◆ rpl_icmp6_dao_output()

void rpl_icmp6_dao_output ( uint8_t lifetime )

Creates an ICMPv6 DAO packet and sends it to the root, advertising the current preferred parent, and with our global address as prefix.

Parameters

lifetime The DAO lifetime. Use 0 to send a No-path DAO

Definition at line 594 of file rpl-icmp6.c.

References ICMP6_RPL, rpl_dag_update_state(), rpl_get_global_address(), rpl_neighbor_get_ipaddr(), and uip_icmp6_send().

Referenced by rpl_dag_leave().

◆ rpl_icmp6_dio_output()

void rpl_icmp6_dio_output ( uip_ipaddr_t * uc_addr )

Creates an ICMPv6 DIO packet and sends it.

Can be unicast or multicast

Parameters

uc_addr The link-local address of the target host, if any. Else, a multicast DIO will be sent.

Definition at line 358 of file rpl-icmp6.c.

References addr, ICMP6_RPL, rpl_dag_update_state(), rpl_get_leaf_only(), and uip_icmp6_send().

Referenced by rpl_process_dis().

◆ rpl_icmp6_dis_output()

void rpl_icmp6_dis_output ( uip_ipaddr_t * addr )

Creates an ICMPv6 DIS packet and sends it.

Can be unicast or multicast.

Parameters

addr	The link-local address of the target host, if any. Else, a multicast DIS will be sent.

Definition at line 151 of file rpl-icmp6.c.

References addr, ICMP6_RPL, rpl_dag_update_state(), and uip_icmp6_send().

Referenced by rpl_dag_periodic().

◆ rpl_icmp6_update_nbr_table()

uip_ds6_nbr_t * rpl_icmp6_update_nbr_table	(	uip_ipaddr_t *	from,
		nbr_table_reason_t	reason,
		void *	data )

Updates IPv6 neighbor cache on incoming link-local RPL ICMPv6 messages.

Parameters

from	The source link-local IPv6 address
reason	What triggered the update (maps to RPL packet types)
data	Generic pointer, used for instance to store parsed DIO data

Returns: A pointer to the new neighbor cache entry, NULL if there was no space left.

Definition at line 113 of file rpl-icmp6.c.

References nbr, uip_ds6_nbr_add(), and uip_ds6_nbr_lookup().

◆ rpl_is_addr_in_our_dag()

int rpl_is_addr_in_our_dag ( const uip_ipaddr_t * addr )

Tells whether a given global IPv6 address is in our current DAG.

Parameters

addr	The global IPv6 address to be tested

Returns: 1 if addr is in our current DAG, 0 otherwise

Definition at line 158 of file rpl-dag.c.

References addr.

Referenced by rpl_ext_header_srh_get_next_hop().

◆ rpl_is_reachable()

int rpl_is_reachable ( void )

Get the RPL's best guess on if we are reachable via have downward route or not.

Returns: 1 if we are reachable, 0 otherwise.

Definition at line 127 of file rpl.c.

◆ rpl_link_callback()

void rpl_link_callback	(	const linkaddr_t *	addr,
		int	status,
		int	numtx )

Called by lower layers after every packet transmission.

Parameters

addr	The link-layer addrress of the packet destination
status	The transmission status (see os/net/mac/mac.h)
numtx	The total number of transmission attempts

Definition at line 97 of file rpl.c.

References addr, nbr, rpl_neighbor_get_from_lladdr(), rpl_neighbor_get_link_metric(), and rpl_timers_schedule_state_update().

◆ rpl_local_repair()

void rpl_local_repair ( const char * str )

Triggers a RPL local repair.

Parameters

str	A textual description of the cause for triggering a repair

Definition at line 240 of file rpl-dag.c.

References rpl_neighbor_remove_all(), rpl_timers_dio_reset(), and rpl_timers_schedule_state_update().

◆ rpl_lollipop_greater_than()

int rpl_lollipop_greater_than	(	int	a,
		int	b )

Greater-than function for a lollipop counter.

Parameters

a	The first counter
b	The second counter

Returns: 1 is a>b else 0

Definition at line 57 of file rpl.c.

◆ rpl_neighbor_count()

int rpl_neighbor_count ( void )

Returns the number of nodes in the RPL neighbor table.

Returns: the neighbor count

Definition at line 168 of file rpl-neighbor.c.

References count, and nbr.

Referenced by rpl_neighbor_print_list().

◆ rpl_neighbor_get_from_ipaddr()

rpl_nbr_t * rpl_neighbor_get_from_ipaddr ( uip_ipaddr_t * addr )

Returns a neighbor from its link-local IPv6 address.

Parameters

addr	The link-local IPv6 address

Returns: The neighbor if found, NULL otherwise

Definition at line 331 of file rpl-neighbor.c.

References addr, uip_ds6_nbr_get_ll(), and uip_ds6_nbr_lookup().

◆ rpl_neighbor_get_from_lladdr()

rpl_nbr_t * rpl_neighbor_get_from_lladdr ( uip_lladdr_t * addr )

Returns a neighbor from its link-layer address.

Parameters

addr	The link-layer address

Returns: The neighbor if found, NULL otherwise

Definition at line 212 of file rpl-neighbor.c.

References addr.

Referenced by rpl_link_callback().

◆ rpl_neighbor_get_ipaddr()

uip_ipaddr_t * rpl_neighbor_get_ipaddr ( rpl_nbr_t * nbr )

Returns a neighbor's (link-local) IPv6 address.

Parameters

nbr	The neighbor

Returns: The link-local IPv6 address if any, NULL otherwise

Definition at line 251 of file rpl-neighbor.c.

References nbr, rpl_neighbor_get_lladdr(), and uip_ds6_nbr_ipaddr_from_lladdr().

Referenced by rpl_dag_periodic(), rpl_dag_update_state(), rpl_icmp6_dao_output(), rpl_neighbor_select_best(), rpl_neighbor_set_preferred_parent(), and rpl_neighbor_snprint().

◆ rpl_neighbor_get_link_metric()

uint16_t rpl_neighbor_get_link_metric ( rpl_nbr_t * nbr )

Returns a neighbor's link metric.

Parameters

nbr	The neighbor

Returns: The link metric if any, 0xffff otherwise

Definition at line 227 of file rpl-neighbor.c.

References nbr.

Referenced by rpl_link_callback(), and rpl_neighbor_snprint().

◆ rpl_neighbor_get_link_stats()

const struct link_stats * rpl_neighbor_get_link_stats ( rpl_nbr_t * nbr )

Returns a neighbor's link statistics.

Parameters

nbr	The neighbor

Returns: The link_stats structure address if any, NULL otherwise

Definition at line 258 of file rpl-neighbor.c.

References nbr, and rpl_neighbor_get_lladdr().

Referenced by rpl_neighbor_is_fresh(), and rpl_neighbor_snprint().

◆ rpl_neighbor_get_lladdr()

const linkaddr_t * rpl_neighbor_get_lladdr ( rpl_nbr_t * nbr )

Returns a neighbors's link-layer address.

Parameters

nbr	The neighbor

Returns: The link-layer address if any, NULL otherwise

Definition at line 245 of file rpl-neighbor.c.

References nbr.

Referenced by rpl_neighbor_get_ipaddr(), and rpl_neighbor_get_link_stats().

◆ rpl_neighbor_is_acceptable_parent()

int rpl_neighbor_is_acceptable_parent ( rpl_nbr_t * nbr )

Tells whether a nbr is acceptable as per the OF's definition.

Parameters

nbr	The neighbor

Returns: 1 if acceptable, 0 otherwise

Definition at line 218 of file rpl-neighbor.c.

References nbr.

Referenced by rpl_neighbor_snprint().

◆ rpl_neighbor_is_fresh()

int rpl_neighbor_is_fresh ( rpl_nbr_t * nbr )

Tells wether we have fresh link information towards a given neighbor.

Parameters

nbr	The neighbor

Returns: 1 if we have fresh link information, 0 otherwise

Definition at line 265 of file rpl-neighbor.c.

References nbr, and rpl_neighbor_get_link_stats().

Referenced by rpl_neighbor_select_best().

◆ rpl_neighbor_is_parent()

int rpl_neighbor_is_parent ( rpl_nbr_t * nbr )

Tells whether a neighbor is in the parent set.

Parameters

nbr	The neighbor to be tested

Returns: 1 if nbr is in the parent set, 0 otherwise

Definition at line 272 of file rpl-neighbor.c.

References nbr.

◆ rpl_neighbor_print_list()

void rpl_neighbor_print_list ( const char * str )

Prints a summary of all RPL neighbors and their properties.

Parameters

str	A descriptive text on the caller

Definition at line 143 of file rpl-neighbor.c.

References nbr, rpl_dag_state_to_str(), rpl_get_global_address(), rpl_neighbor_count(), and rpl_neighbor_snprint().

Referenced by rpl_dag_update_state(), rpl_global_repair(), and rpl_refresh_routes().

◆ rpl_neighbor_rank_via_nbr()

rpl_rank_t rpl_neighbor_rank_via_nbr ( rpl_nbr_t * nbr )

Returns our rank if selecting a given parent as preferred parent.

Parameters

nbr	The neighbor

Returns: The resulting rank if any, RPL_INFINITE_RANK otherwise

Definition at line 236 of file rpl-neighbor.c.

References nbr.

Referenced by rpl_dag_update_state(), and rpl_neighbor_snprint().

◆ rpl_neighbor_select_best()

rpl_nbr_t * rpl_neighbor_select_best ( void )

Returns the best candidate for preferred parent.

Returns: The best candidate, NULL if no usable parent is found

Definition at line 377 of file rpl-neighbor.c.

References rpl_neighbor_get_ipaddr(), rpl_neighbor_is_fresh(), and rpl_schedule_probing_now().

Referenced by rpl_dag_update_state().

◆ rpl_neighbor_set_preferred_parent()

void rpl_neighbor_set_preferred_parent ( rpl_nbr_t * nbr )

Set current RPL preferred parent and update DS6 default route accordingly.

Parameters

nbr	The new preferred parent

Definition at line 278 of file rpl-neighbor.c.

References nbr, and rpl_neighbor_get_ipaddr().

Referenced by rpl_dag_update_state(), and rpl_neighbor_remove_all().

◆ rpl_neighbor_snprint()

int rpl_neighbor_snprint	(	char *	buf,
		int	buflen,
		rpl_nbr_t *	nbr )

Print a textual description of RPL neighbor into a string.

Parameters

buf	The buffer where to write content
buflen	The buffer len
nbr	A pointer to a RPL neighbor that will be written to the buffer

Returns: Identical to snprintf: number of bytes written excluding ending null byte. A value >= buflen if the buffer was too small.

Definition at line 90 of file rpl-neighbor.c.

References CLOCK_SECOND, clock_time(), log_6addr_compact_snprint(), nbr, rpl_neighbor_get_ipaddr(), rpl_neighbor_get_link_metric(), rpl_neighbor_get_link_stats(), rpl_neighbor_is_acceptable_parent(), rpl_neighbor_rank_via_nbr(), and uiplib_ipaddr_snprint().

Referenced by rpl_neighbor_print_list().

◆ rpl_process_dao()

void rpl_process_dao	(	uip_ipaddr_t *	from,
		rpl_dao_t *	dao )

Processes incoming DAO.

Parameters

from	The IPv6 address of the originator
dao	A pointer to a parsed DAO

Definition at line 633 of file rpl-dag.c.

References rpl_timers_schedule_dao_ack(), uip_sr_expire_parent(), and uip_sr_update_node().

◆ rpl_process_dao_ack()

void rpl_process_dao_ack	(	uint8_t	sequence,
		uint8_t	status )

Processes incoming DAO-ACK.

Parameters

sequence	The DAO-ACK sequence number
status	The DAO-ACK status (see RPL_DAO_ACK_* defines)

◆ rpl_process_dio()

void rpl_process_dio	(	uip_ipaddr_t *	from,
		rpl_dio_t *	dio )

Processes incoming DIO.

Parameters

from	The IPv6 address of the originator
dio	A pointer to a parsed DIO

Definition at line 600 of file rpl-dag.c.

References rpl_dag_update_state().

◆ rpl_process_dis()

void rpl_process_dis	(	uip_ipaddr_t *	from,
		int	is_multicast )

Processes incoming DIS.

Parameters

from	The IPv6 address of the originator
is_multicast	Set to 1 for multicast DIS, 0 for unicast DIS

Definition at line 619 of file rpl-dag.c.

References rpl_icmp6_dio_output(), and rpl_timers_dio_reset().

◆ rpl_process_hbh()

int rpl_process_hbh	(	rpl_nbr_t *	sender,
		uint16_t	sender_rank,
		int	loop_detected,
		int	rank_error_signaled )

Processes Hop-by-Hop (HBH) Extension Header of a packet currently being forwrded.

Parameters

sender	The IPv6 address of the originator
sender_rank	The rank advertised by the sender in the HBH header
loop_detected	1 if we could detect a loop while forwarding, 0 otherwise
rank_error_signaled	1 if the HBH header advertises a rank error, 0 otherwise

Returns: 1 if the packet is to be forwarded, 0 if it is to be dropped

Definition at line 680 of file rpl-dag.c.

References rpl_dag_update_state(), rpl_timers_dio_reset(), and rpl_timers_schedule_unicast_dio().

Referenced by rpl_ext_header_hbh_update().

◆ rpl_refresh_routes()

void rpl_refresh_routes ( const char * str )

Triggers a route fresh via DTSN increment.

Parameters

str	a textual description of the cause for refresh

Definition at line 189 of file rpl-dag.c.

References rpl_neighbor_print_list().

◆ rpl_reset_prefix()

void rpl_reset_prefix ( rpl_prefix_t * last_prefix )

Removes current prefx.

Parameters

last_prefix The last prefix (which is to be removed)

Definition at line 141 of file rpl.c.

References ipaddr.

Referenced by rpl_dag_leave().

◆ rpl_set_leaf_only()

void rpl_set_leaf_only ( uint8_t value )

Changes the value of the rpl_leaf_only flag, which determines if a node acts only as a leaf in the network.

Parameters

value the value to set: 0-disable, 1-enable

Definition at line 236 of file rpl.c.

◆ rpl_set_prefix()

int rpl_set_prefix ( rpl_prefix_t * prefix )

Set prefix from an prefix data structure (from DIO)

Parameters

prefix The prefix

Returns: 1 if success, 0 otherwise

Definition at line 185 of file rpl.c.

References rpl_set_prefix_from_addr().

◆ rpl_set_prefix_from_addr()

int rpl_set_prefix_from_addr	(	uip_ipaddr_t *	addr,
		unsigned	len,
		uint8_t	flags )

Set prefix from an IPv6 address.

Parameters

addr	The prefix
len	The prefix length
flags	The DIO prefix flags

Returns: 1 if success, 0 otherwise

Definition at line 157 of file rpl.c.

References addr, flags, ipaddr, and uip_ds6_addr_add().

Referenced by rpl_set_prefix().

◆ rpl_timers_dio_reset()

void rpl_timers_dio_reset ( const char * str )

Reset DIO Trickle timer.

Parameters

str	A textual description of caused the DIO timer reset

Definition at line 150 of file rpl-timers.c.

References rpl_dag_ready_to_advertise(), and rpl_get_leaf_only().

Referenced by rpl_dag_init_root(), rpl_dag_update_state(), rpl_local_repair(), rpl_process_dis(), and rpl_process_hbh().

◆ rpl_timers_schedule_state_update()

void rpl_timers_schedule_state_update ( void )

Schedule a state update ASAP.

Useful to force an update from a context where updating directly would be unsafe.

Definition at line 555 of file rpl-timers.c.

References ctimer_set().

Referenced by rpl_dag_periodic(), rpl_dag_poison_and_leave(), rpl_link_callback(), and rpl_local_repair().

Files

Data Structures

Macros

Enumerations

Functions

Detailed Description

Function Documentation

◆ rpl_dag_get_root_ipaddr()

◆ rpl_dag_init_root()

◆ rpl_dag_periodic()

◆ rpl_dag_ready_to_advertise()

◆ rpl_dag_root_is_root()

◆ rpl_dag_root_print_links()

◆ rpl_dag_root_set_prefix()

◆ rpl_dag_root_start()

◆ rpl_dag_state_to_str()

◆ rpl_ext_header_hbh_update()

◆ rpl_ext_header_remove()

◆ rpl_ext_header_srh_get_next_hop()

◆ rpl_ext_header_srh_update()

◆ rpl_ext_header_update()

◆ rpl_get_any_dag()

◆ rpl_get_default_instance()

◆ rpl_get_global_address()

◆ rpl_get_leaf_only()

◆ rpl_global_repair()

◆ rpl_has_joined()

◆ rpl_icmp6_dao_ack_output()

◆ rpl_icmp6_dao_output()

◆ rpl_icmp6_dio_output()

◆ rpl_icmp6_dis_output()

◆ rpl_icmp6_update_nbr_table()

◆ rpl_is_addr_in_our_dag()

◆ rpl_is_reachable()

◆ rpl_link_callback()

◆ rpl_local_repair()

◆ rpl_lollipop_greater_than()

◆ rpl_neighbor_count()

◆ rpl_neighbor_get_from_ipaddr()

◆ rpl_neighbor_get_from_lladdr()

◆ rpl_neighbor_get_ipaddr()

◆ rpl_neighbor_get_link_metric()

◆ rpl_neighbor_get_link_stats()

◆ rpl_neighbor_get_lladdr()

◆ rpl_neighbor_is_acceptable_parent()

◆ rpl_neighbor_is_fresh()

◆ rpl_neighbor_is_parent()

◆ rpl_neighbor_print_list()

◆ rpl_neighbor_rank_via_nbr()

◆ rpl_neighbor_select_best()

◆ rpl_neighbor_set_preferred_parent()

◆ rpl_neighbor_snprint()

◆ rpl_process_dao()

◆ rpl_process_dao_ack()

◆ rpl_process_dio()

◆ rpl_process_dis()

◆ rpl_process_hbh()

◆ rpl_refresh_routes()

◆ rpl_reset_prefix()

◆ rpl_set_leaf_only()

◆ rpl_set_prefix()

◆ rpl_set_prefix_from_addr()

◆ rpl_timers_dio_reset()

◆ rpl_timers_schedule_state_update()