uip-nd6.h File Reference

    Neighbor discovery (RFC 4861)

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#include "net/uip.h"
#include "sys/stimer.h"

Go to the source code of this file.

Data Structures
struct	uip_nd6_neighbor
	An entry in the neighbor cache. More...
struct	uip_nd6_defrouter
	An entry in the default router list. More...
struct	uip_nd6_prefix
	A prefix list entry. More...
struct	uip_nd6_ns
	A neighbor solicitation constant part. More...
struct	uip_nd6_na
	A neighbor advertisement constant part. More...
struct	uip_nd6_rs
	A router solicitation constant part. More...
struct	uip_nd6_ra
	A router advertisement constant part. More...
struct	uip_nd6_redirect
	A redirect message constant part. More...
struct	uip_nd6_opt_hdr
	ND option header. More...
struct	uip_nd6_opt_prefix_info
	ND option prefix information. More...
struct	uip_nd6_opt_mtu
	ND option MTU. More...

Macros
General
#define	UIP_ND6_HOP_LIMIT   255
	HOP LIMIT to be used when sending ND messages (255)
#define	UIP_ND6_INFINITE_LIFETIME   0xFFFFFFFF
	INFINITE lifetime.
Configuration options
#define	UIP_CONF_ND6_MAX_NEIGHBORS   4
	max number of entries in the neighbor cache
#define	UIP_CONF_ND6_MAX_DEFROUTERS   2
	max number of entries in the default router cache
#define	UIP_CONF_ND6_MAX_PREFIXES   2
	max number of entries in the prefix list
RFC 4861 Host constant
#define	UIP_ND6_MAX_RTR_SOLICITATION_DELAY   1
#define	UIP_ND6_RTR_SOLICITATION_INTERVAL   4
#define	UIP_ND6_MAX_RTR_SOLICITATIONS   3
RFC 4861 Router constants
#define	UIP_ND6_SEND_RA   1 /* enable/disable RA sending */
#define	UIP_ND6_MAX_RA_INTERVAL   600
#define	UIP_ND6_MIN_RA_INTERVAL   (UIP_ND6_MAX_RA_INTERVAL / 3)
#define	UIP_ND6_M_FLAG   0
#define	UIP_ND6_O_FLAG   0
#define	UIP_ND6_ROUTER_LIFETIME   3 * UIP_ND6_MAX_RA_INTERVAL
#define	UIP_ND6_MAX_INITIAL_RA_INTERVAL   16 /*seconds*/
#define	UIP_ND6_MAX_INITIAL_RAS   3 /*transmissions*/
#define	UIP_ND6_MIN_DELAY_BETWEEN_RAS   3 /*seconds*/
#define	UIP_ND6_MAX_RA_DELAY_TIME_MS   500 /*milli seconds*/
RFC 4861 Node constant
#define	UIP_ND6_MAX_MULTICAST_SOLICIT   3
#define	UIP_ND6_MAX_UNICAST_SOLICIT   3
#define	UIP_ND6_REACHABLE_TIME   30000
#define	UIP_ND6_RETRANS_TIMER   1000
#define	UIP_ND6_DELAY_FIRST_PROBE_TIME   5
#define	UIP_ND6_MIN_RANDOM_FACTOR(x)   (x / 2)
#define	UIP_ND6_MAX_RANDOM_FACTOR(x)   ((x) + (x) / 2)
ND6 option types
#define	UIP_ND6_OPT_SLLAO   1
#define	UIP_ND6_OPT_TLLAO   2
#define	UIP_ND6_OPT_PREFIX_INFO   3
#define	UIP_ND6_OPT_REDIRECTED_HDR   4
#define	UIP_ND6_OPT_MTU   5
#define	UIP_ND6_OPT_TYPE_OFFSET   0
#define	UIP_ND6_OPT_LEN_OFFSET   1
#define	UIP_ND6_OPT_DATA_OFFSET   2
ND6 message length (excluding options)
#define	UIP_ND6_NA_LEN   20
#define	UIP_ND6_NS_LEN   20
#define	UIP_ND6_RA_LEN   12
#define	UIP_ND6_RS_LEN   4
ND6 option length in bytes
#define	UIP_ND6_OPT_HDR_LEN   2
#define	UIP_ND6_OPT_PREFIX_INFO_LEN   32
#define	UIP_ND6_OPT_MTU_LEN   8
#define	UIP_ND6_OPT_LLAO_LEN   8
	length of a ND6 LLAO option for default L2 type (e.g. More...
Neighbor Advertisement flags masks
#define	UIP_ND6_NA_FLAG_ROUTER   0x80
#define	UIP_ND6_NA_FLAG_SOLICITED   0x40
#define	UIP_ND6_NA_FLAG_OVERRIDE   0x20
#define	UIP_ND6_RA_FLAG_ONLINK   0x80
#define	UIP_ND6_RA_FLAG_AUTONOMOUS   0x40

Typedefs
ND message structures
Note We do not use a destination cache, do next-hop determination each time a packet needs to be sent. (info such as rtt, path mtu could be stored in uip_conn)
typedef struct uip_nd6_ns	uip_nd6_ns
	A neighbor solicitation constant part. More...
typedef struct uip_nd6_na	uip_nd6_na
	A neighbor advertisement constant part. More...
typedef struct uip_nd6_rs	uip_nd6_rs
	A router solicitation constant part. More...
typedef struct uip_nd6_ra	uip_nd6_ra
	A router advertisement constant part. More...
typedef struct uip_nd6_redirect	uip_nd6_redirect
	A redirect message constant part. More...
ND Option structures
typedef struct uip_nd6_opt_hdr	uip_nd6_opt_hdr
	ND option header.
typedef struct uip_nd6_opt_prefix_info	uip_nd6_opt_prefix_info
	ND option prefix information.
typedef struct uip_nd6_opt_mtu	uip_nd6_opt_mtu
	ND option MTU.
typedef struct uip_nd6_opt_redirected_hdr	uip_nd6_opt_redirected_hdr

Enumerations
enum	uip_neighbor_state
	Possible states for the neighbor cache entries. More...

Functions
ND Neighbor Cache, Router List and Prefix List handling functions
void	uip_nd6_init (void)
	Initialize Neighbor Discovery structures.
void	uip_nd6_periodic (void)
	Periodic processing of Neighbor Discovery Structures.
struct uip_nd6_neighbor *	uip_nd6_nbrcache_lookup (uip_ipaddr_t *ipaddr)
	Look for a neighbor cache entry corresponding to a specific IP address. More...
struct uip_nd6_neighbor *	uip_nd6_nbrcache_add (uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr, u8_t isrouter, uip_neighbor_state state)
	Add a neighbor cache entry. More...
struct uip_nd6_defrouter *	uip_nd6_choose_defrouter (void)
	Returns a default router.
struct uip_nd6_defrouter *	uip_nd6_defrouter_lookup (struct uip_nd6_neighbor *neighbor)
	Find a default router corresponding to a given neighbor cache entry. More...
void	uip_nd6_defrouter_rm (struct uip_nd6_defrouter *router)
	Remove a default router. More...
struct uip_nd6_defrouter *	uip_nd6_defrouter_add (struct uip_nd6_neighbor *neighbor, unsigned long interval)
	Add a default router. More...
u8_t	uip_nd6_is_addr_onlink (uip_ipaddr_t *ipaddr)
	Check if an IP address in on-link by looking at prefix list. More...
struct uip_nd6_prefix *	uip_nd6_prefix_lookup (uip_ipaddr_t *ipaddr)
	Find a given prefix. More...
struct uip_nd6_prefix *	uip_nd6_prefix_add (uip_ipaddr_t *ipaddr, u8_t length, unsigned long interval)
	Add a prefix. More...
void	uip_nd6_prefix_rm (struct uip_nd6_prefix *prefix)
	Remove a prefix from th eprefix list. More...
ND Messages Processing and Generation
void	uip_nd6_ns_input (void)
	Process a neighbor solicitation. More...
void	uip_nd6_ns_output (uip_ipaddr_t *src, uip_ipaddr_t *dest, uip_ipaddr_t *tgt)
	Send a neighbor solicitation, send a Neighbor Advertisement. More...
void	uip_nd6_na_input (void)
	Process a Neighbor Advertisement. More...
void	uip_nd6_rs_output (void)
	Send a Router Solicitation. More...
void	uip_nd6_ra_input (void)
	process a Router Advertisement More...

Detailed Description

    Neighbor discovery (RFC 4861)

Author

Julien Abeille jabei.nosp@m.lle@.nosp@m.cisco.nosp@m..com

Mathilde Durvy mdurv.nosp@m.y@ci.nosp@m.sco.c.nosp@m.om

Definition in file uip-nd6.h.