static void emac_receive(FAR struct emac_driver_s *priv)
{
do
{
/* Check for errors and update statistics */
/* Check if the packet is a valid size for the uIP buffer configuration */
/* Copy the data data from the hardware to priv->d_dev.d_buf. Set
* amount of data in priv->d_dev.d_len
*/
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv6
if (BUF->type == HTONS(ETHTYPE_IP6))
#else
if (BUF->type == HTONS(ETHTYPE_IP))
#endif
{
arp_ipin(&priv->d_dev);
devif_input(&priv->d_dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, the field d_len will set to a value > 0.
*/
if (priv->d_dev.d_len > 0)
{
arp_out(&priv->d_dev);
emac_transmit(priv);
}
}
else if (BUF->type == htons(ETHTYPE_ARP))
{
arp_arpin(&priv->d_dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, the field d_len will set to a value > 0.
*/
if (priv->d_dev.d_len > 0)
{
emac_transmit(priv);
}
}
}
while (true); /* While there are more packets to be processed */
}
void netdriver_loop(void)
{
/* netdev_read will return 0 on a timeout event and >0 on a data received event */
g_sim_dev.d_len = netdev_read((unsigned char*)g_sim_dev.d_buf, CONFIG_NET_ETH_MTU);
/* Disable preemption through to the following so that it behaves a little more
* like an interrupt (otherwise, the following logic gets pre-empted an behaves
* oddly.
*/
sched_lock();
if (g_sim_dev.d_len > 0)
{
/* Data received event. Check for valid Ethernet header with destination == our
* MAC address
*/
if (g_sim_dev.d_len > ETH_HDRLEN && up_comparemac(BUF->ether_dhost, &g_sim_dev.d_mac) == 0)
{
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv6
if (BUF->ether_type == htons(ETHTYPE_IP6))
#else
if (BUF->ether_type == htons(ETHTYPE_IP))
#endif
{
arp_ipin(&g_sim_dev);
devif_input(&g_sim_dev);
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* d_len is set to a value > 0.
*/
if (g_sim_dev.d_len > 0)
{
arp_out(&g_sim_dev);
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
else if (BUF->ether_type == htons(ETHTYPE_ARP))
{
arp_arpin(&g_sim_dev);
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* d_len is set to a value > 0.
*/
if (g_sim_dev.d_len > 0)
{
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
}
}
/* Otherwise, it must be a timeout event */
else if (timer_expired(&g_periodic_timer))
{
timer_reset(&g_periodic_timer);
devif_timer(&g_sim_dev, sim_txpoll, 1);
}
sched_unlock();
}
