void fnet_eth_output_ip4(fnet_netif_t *netif, fnet_ip4_addr_t dest_ip_addr, fnet_netbuf_t* nb)
{
fnet_mac_addr_t destination_addr; /* 48-bit destination address */
fnet_mac_addr_t * dest_ptr;
/* Construct Ethernet header. Start with looking up deciding which
* MAC address to use as a destination address. Broadcasts and
* multicasts are special, all other addresses are looked up in the
* ARP table. */
if(fnet_ip_addr_is_broadcast (dest_ip_addr, netif))
{
fnet_memcpy (destination_addr, fnet_eth_broadcast, sizeof(fnet_mac_addr_t));
}
else if(FNET_IP4_ADDR_IS_MULTICAST(dest_ip_addr))
{
/* Hash IP multicast address to MAC address. */
destination_addr[0] = 0x01;
destination_addr[1] = 0x0;
destination_addr[2] = 0x5e;
destination_addr[3] = (unsigned char)(FNET_IP4_ADDR2(dest_ip_addr)& 0x7f);
destination_addr[4] = (unsigned char)(FNET_IP4_ADDR3(dest_ip_addr));
destination_addr[5] = (unsigned char)(FNET_IP4_ADDR4(dest_ip_addr));
//TBD Use macro
}
else
/* Unicast address. */
{
if((dest_ptr = fnet_arp_lookup(netif, dest_ip_addr))!=0)
{
fnet_memcpy (destination_addr, *dest_ptr, sizeof(fnet_mac_addr_t));
}
else
{
fnet_arp_resolve(netif, dest_ip_addr, nb);
goto EXIT;
}
}
/* Send Ethernet frame. */
((fnet_eth_if_t *)(netif->if_ptr))->output(netif, FNET_ETH_TYPE_IP4, destination_addr, nb);
EXIT:
return;
}
void fnet_eth_output_ip4(fnet_netif_t *netif, fnet_ip4_addr_t dest_ip_addr, fnet_netbuf_t *nb)
{
fnet_mac_addr_t destination_addr; /* 48-bit destination address */
/* Construct Ethernet header. Start with looking up deciding which
* MAC address to use as a destination address. Broadcasts and
* multicasts are special, all other addresses are looked up in the
* ARP table. */
if(fnet_ip_addr_is_broadcast (dest_ip_addr, netif))
{
fnet_memcpy (destination_addr, fnet_eth_broadcast, sizeof(fnet_mac_addr_t));
}
else if(FNET_IP4_ADDR_IS_MULTICAST(dest_ip_addr))
{
/* Hash IP multicast address to MAC address. */
destination_addr[0] = 0x01U;
destination_addr[1] = 0x0U;
destination_addr[2] = 0x5eU;
destination_addr[3] = (fnet_uint8_t)(FNET_IP4_ADDR2(dest_ip_addr) & 0x7fU);
destination_addr[4] = (fnet_uint8_t)(FNET_IP4_ADDR3(dest_ip_addr));
destination_addr[5] = (fnet_uint8_t)(FNET_IP4_ADDR4(dest_ip_addr));
/* TBD Use macro. */
}
else
/* Unicast address. */
{
if(fnet_arp_get_mac( (fnet_netif_desc_t) netif, dest_ip_addr, destination_addr) == FNET_FALSE)
{
fnet_arp_resolve(netif, dest_ip_addr, nb);
goto EXIT;
}
}
/* Send Ethernet frame. */
fnet_eth_output(netif, FNET_ETH_TYPE_IP4, destination_addr, nb);
EXIT:
return;
}
