+ struct pbuf *p;
+ struct eth_hdr *ethhdr;
+ static int ticks = 0;
+
+ if (!_nic)
+ return;
+
+ smram_tseg_set_state(SMRAM_TSEG_OPEN);
+
+ if ((ticks % 1000) == 0) /* About a minute */
+ dhcp_coarse_tmr();
+ if ((ticks % 8) == 0) /* About 500msec*/
+ dhcp_fine_tmr();
+ if ((ticks % 4) == 0) /* About 250msec*/
+ tcp_tmr();
+ ticks++;
+
+ if ((p = _nic->recv(_nic)) != NULL)
+ {
+ outputf("NIC: Packet: %d bytes", p->tot_len);
+
+ LINK_STATS_INC(link.recv);
+
+ ethhdr = p->payload;
+
+ switch (htons(ethhdr->type)) {
+ case ETHTYPE_IP:
+ case ETHTYPE_ARP:
+ if (_netif.input(p, &_netif) != ERR_OK)
+ {
+ LWIP_DEBUGF(NETIF_DEBUG, ("netdev_input: IP input error\n"));
+ pbuf_free(p);
+ }
+ break;
+
+ default:
+ outputf("Unhandled packet type %04x input", ethhdr->type);
+ pbuf_free(p);
+ break;
+ }
+ }
+}
+
+static err_t _transmit(struct netif *netif, struct pbuf *p)
+{
+ struct nic *nic = netif->state;
+
+ outputf("NIC: Transmit packet");
+
+ nic->transmit(p);
+
+ LINK_STATS_INC(link.xmit);
+
+ return ERR_OK;
+}
+
+static err_t _init(struct netif *netif)
+{
+ struct nic *nic = netif->state;
+
+ LWIP_ASSERT("netif != NULL", (netif != NULL));
+
+#if LWIP_NETIF_HOSTNAME
+ netif->hostname = "netwatch";
+#endif
+
+ NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 100000000);
+
+ netif->name[0] = 'e';
+ netif->name[1] = 'n';
+ netif->output = etharp_output;
+ netif->linkoutput = _transmit;
+
+ memcpy(netif->hwaddr, nic->hwaddr, 6);
+ netif->mtu = 1500;
+ netif->hwaddr_len = ETHARP_HWADDR_LEN;
+ netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
+
+ return ERR_OK;