ethip6.c File Reference

Ethernet output for IPv6.

Uses ND tables for link-layer addressing.

#include "lwip/opt.h"
#include "lwip/ethip6.h"
#include "lwip/nd6.h"
#include "lwip/pbuf.h"
#include "lwip/ip6.h"
#include "lwip/ip6_addr.h"
#include "lwip/inet_chksum.h"
#include "lwip/netif.h"
#include "lwip/icmp6.h"
#include <string.h>

Data Structures
struct	eth_addr
	The ethernet address. More...
struct	eth_hdr
	Ethernet header. More...

Macros
#define	ETHTYPE_IPV6   0x86DD
#define	SIZEOF_ETH_HDR   (14 + ETH_PAD_SIZE)

Functions
err_t	ethip6_output (struct netif *netif, struct pbuf *q, ip6_addr_t *ip6addr)
	Resolve and fill-in Ethernet address header for outgoing IPv6 packet. More...
static err_t	ethip6_send (struct netif *netif, struct pbuf *p, struct eth_addr *src, struct eth_addr *dst)
	Send an IPv6 packet on the network using netif->linkoutput The ethernet header is filled in before sending. More...

Variables
PACK_STRUCT_BEGIN struct eth_addr	PACK_STRUCT_STRUCT

#define ETHTYPE_IPV6   0x86DD

Referenced by ethernet_input(), and ethip6_send().

#define SIZEOF_ETH_HDR   (14 + ETH_PAD_SIZE)

Referenced by etharp_arp_input(), etharp_raw(), etharp_send_ip(), ethernet_input(), and ethip6_output().

err_t ethip6_output	(	struct netif *	netif,
		struct pbuf *	q,
		ip6_addr_t *	ip6addr
	)

Resolve and fill-in Ethernet address header for outgoing IPv6 packet.

For IPv6 multicast, corresponding Ethernet addresses are selected and the packet is transmitted on the link.

For unicast addresses, ...

anycast addresses

Parameters

netif	The lwIP network interface which the IP packet will be sent on.
q	The pbuf(s) containing the IP packet to be sent.
ip6addr	The IP address of the packet destination.

Returns

• ERR_RTE No route to destination (no gateway to external networks), or the return type of either etharp_query() or etharp_send_ip().

References nd6_neighbor_cache_entry::counter, nd6_neighbor_cache_entry::delay_time, ERR_BUF, ERR_MEM, ETHARP_DEBUG, ethip6_send(), netif::hwaddr, ip6_addr_ismulticast, nd6_neighbor_cache_entry::lladdr, LWIP_DBG_LEVEL_SERIOUS, LWIP_DBG_TRACE, LWIP_DEBUGF, ND6_DELAY, nd6_get_next_hop_entry(), ND6_PROBE, nd6_queue_packet(), ND6_REACHABLE, ND6_STALE, neighbor_cache, pbuf_header(), SIZEOF_ETH_HDR, and nd6_neighbor_cache_entry::state.

Referenced by winc_netif_init().

static err_t ethip6_send ( struct netif *  netif, struct pbuf *  p, struct eth_addr *  src, struct eth_addr *  dst  )

static

Send an IPv6 packet on the network using netif->linkoutput The ethernet header is filled in before sending.

netif the lwIP network interface on which to send the packet p the packet to send, p->payload pointing to the (uninitialized) ethernet header src the source MAC address to be copied into the ethernet header dst the destination MAC address to be copied into the ethernet header

Returns

ERR_OK if the packet was sent, any other err_t on failure

References ETHARP_DEBUG, ETHTYPE_IPV6, netif::hwaddr_len, netif::linkoutput, LWIP_ASSERT, LWIP_DBG_TRACE, LWIP_DEBUGF, pbuf::payload, and PP_HTONS.

Referenced by ethip6_output().

PACK_STRUCT_END PACK_STRUCT_BEGIN struct eth_hdr PACK_STRUCT_STRUCT