uip-nd6.c File Reference

Neighbor discovery (RFC 4861) More...

#include <string.h>
#include "net/ipv6/uip-icmp6.h"
#include "net/ipv6/uip-nd6.h"
#include "net/ipv6/uip-ds6.h"
#include "net/ip/uip-nameserver.h"
#include "lib/random.h"
#include "net/ip/uip-debug.h"

Go to the source code of this file.

Macros
#define	UIP_ND6_OPT_HDR_BUF   ((uip_nd6_opt_hdr *)&uip_buf[uip_l2_l3_icmp_hdr_len + nd6_opt_offset])
	Pointer to ND option.
Pointers to the header structures.
All pointers except UIP_IP_BUF depend on uip_ext_len, which at packet reception, is the total length of the extension headers. The pointer to ND6 options header also depends on nd6_opt_offset, which we set in each function. Care should be taken when manipulating these buffers about the value of these length variables
#define	UIP_IP_BUF   ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
	Pointer to IP header.
#define	UIP_ICMP_BUF   ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
	Pointer to ICMP header.
#define	UIP_ND6_RS_BUF   ((uip_nd6_rs *)&uip_buf[uip_l2_l3_icmp_hdr_len])
#define	UIP_ND6_RA_BUF   ((uip_nd6_ra *)&uip_buf[uip_l2_l3_icmp_hdr_len])
#define	UIP_ND6_NS_BUF   ((uip_nd6_ns *)&uip_buf[uip_l2_l3_icmp_hdr_len])
#define	UIP_ND6_NA_BUF   ((uip_nd6_na *)&uip_buf[uip_l2_l3_icmp_hdr_len])

Functions
static int	extract_lladdr_from_llao_aligned (uip_lladdr_t *dest)
	Pointer to a prefix list entry.
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_rs_output (void)
	Send a Router Solicitation. More...
void	ra_input (void)
	Process a Router Advertisement. More...
void	uip_nd6_init ()
	Initialise the uIP ND core.

Variables
static uint8_t *	nd6_opt_llao
	Offset from the end of the icmpv6 header to the option in uip_buf.
static uip_ds6_nbr_t *	nbr
	Pointer to llao option in uip_buf.
static uip_ds6_defrt_t *	defrt
	Pointer to a nbr cache entry.
static uip_ds6_addr_t *	addr
	Pointer to a router list entry.
static uip_nd6_opt_prefix_info *	nd6_opt_prefix_info
	Pointer to an interface address.
static uip_ipaddr_t	ipaddr
	Pointer to prefix information option in uip_buf.

Detailed Description

Neighbor discovery (RFC 4861)

Author

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

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

Definition in file uip-nd6.c.

Function Documentation

void ra_input

(

void

)

Process a Router Advertisement.

• Possible actions when receiving a RA: add router to router list, recalculate reachable time, update link hop limit, update retrans timer.
• If MTU option: update MTU.
• If SLLAO option: update entry in neighbor cache
• If prefix option: start autoconf, add prefix to prefix list

Definition at line 848 of file uip-nd6.c.

References extract_lladdr_from_llao_aligned(), ipaddr, NBR_INCOMPLETE, nd6_opt_llao, NULL, stimer_remaining(), stimer_set(), uip_ds6_addr_add(), uip_ds6_compute_reachable_time(), uip_ds6_if, uip_ds6_nbr_add(), uip_ds6_set_addr_iid(), UIP_ICMP_BUF, UIP_IP_BUF, uip_ipaddr_copy, uip_is_addr_linklocal, uip_len, uip_lladdr, UIP_LLADDR_LEN, uip_nameserver_update(), UIP_ND6_HOP_LIMIT, UIP_ND6_INFINITE_LIFETIME, UIP_ND6_OPT_HDR_BUF, and UIP_STAT.