void uipdriver_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_BUFSIZE);
/* 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 > UIP_LLH_LEN && 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(UIP_ETHTYPE_IP6))
#else
if (BUF->ether_type == htons(UIP_ETHTYPE_IP))
#endif
{
uip_arp_ipin(&g_sim_dev);
uip_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)
{
uip_arp_out(&g_sim_dev);
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
else if (BUF->ether_type == htons(UIP_ETHTYPE_ARP))
{
uip_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);
uip_timer(&g_sim_dev, sim_uiptxpoll, 1);
}
sched_unlock();
}
void netdriver_loop(void)
{
FAR struct eth_hdr_s *eth;
/* Check for new frames. If so, then poll the network for new XMIT data */
net_lock();
(void)devif_poll(&g_sim_dev, sim_txpoll);
net_unlock();
/* netdev_read will return 0 on a timeout event and >0 on a data received event */
g_sim_dev.d_len = netdev_read((FAR 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
*/
eth = BUF;
if (g_sim_dev.d_len > ETH_HDRLEN)
{
int is_ours;
/* Figure out if this ethernet frame is addressed to us. This affects
* what we're willing to receive. Note that in promiscuous mode, the
* up_comparemac will always return 0.
*/
is_ours = (up_comparemac(eth->dest, &g_sim_dev.d_mac.ether) == 0);
#ifdef CONFIG_NET_PKT
/* When packet sockets are enabled, feed the frame into the packet
* tap.
*/
if (is_ours)
{
pkt_input(&g_sim_dev);
}
#endif /* CONFIG_NET_PKT */
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv4
if (eth->type == HTONS(ETHTYPE_IP) && is_ours)
{
ninfo("IPv4 frame\n");
/* Handle ARP on input then give the IPv4 packet to the network
* layer
*/
arp_ipin(&g_sim_dev);
ipv4_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)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv6
if (IFF_IS_IPv4(g_sim_dev.d_flags))
#endif
{
arp_out(&g_sim_dev);
}
#ifdef CONFIG_NET_IPv6
else
{
neighbor_out(&g_sim_dev);
}
#endif
/* And send the packet */
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
else
#endif /* CONFIG_NET_IPv4 */
#ifdef CONFIG_NET_IPv6
if (eth->type == HTONS(ETHTYPE_IP6) && is_ours)
{
ninfo("Iv6 frame\n");
/* Give the IPv6 packet to the network layer */
ipv6_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)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv4
if (IFF_IS_IPv4(g_sim_dev.d_flags))
{
arp_out(&g_sim_dev);
}
else
#endif
#ifdef CONFIG_NET_IPv6
{
neighbor_out(&g_sim_dev);
}
#endif /* CONFIG_NET_IPv6 */
/* And send the packet */
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
else
#endif/* CONFIG_NET_IPv6 */
#ifdef CONFIG_NET_ARP
if (eth->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);
}
}
else
#endif
{
nwarn("WARNING: Unsupported Ethernet type %u\n", eth->type);
}
}
}
/* 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);
}
sched_unlock();
}