nes-proj/cpu/6502/net/ethernet-drv.c

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/*
* Copyright (c) 2007, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
#include <stdio.h>
#include "contiki-net.h"
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#include "net/ethernet.h"
#include "net/ipv4/uip-neighbor.h"
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#include "net/ethernet-drv.h"
#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
PROCESS(ethernet_process, "Ethernet driver");
/*---------------------------------------------------------------------------*/
uint8_t
ethernet_output(void)
{
uip_arp_out();
ethernet_send();
return 0;
}
/*---------------------------------------------------------------------------*/
static void
pollhandler(void)
{
process_poll(&ethernet_process);
uip_len = ethernet_poll();
if(uip_len > 0) {
#if NETSTACK_CONF_WITH_IPV6
if(BUF->type == uip_htons(UIP_ETHTYPE_IPV6)) {
uip_neighbor_add(&IPBUF->srcipaddr, &BUF->src);
tcpip_input();
} else
#endif /* NETSTACK_CONF_WITH_IPV6 */
if(BUF->type == uip_htons(UIP_ETHTYPE_IP)) {
uip_len -= sizeof(struct uip_eth_hdr);
tcpip_input();
} else if(BUF->type == uip_htons(UIP_ETHTYPE_ARP)) {
uip_arp_arpin();
/* If the above function invocation resulted in data that
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should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if(uip_len > 0) {
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ethernet_send();
}
}
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(ethernet_process, ev, data)
{
PROCESS_POLLHANDLER(pollhandler());
PROCESS_BEGIN();
ethernet_init((struct ethernet_config *)data);
tcpip_set_outputfunc(ethernet_output);
process_poll(&ethernet_process);
PROCESS_WAIT_UNTIL(ev == PROCESS_EVENT_EXIT);
ethernet_exit();
PROCESS_END();
}
/*---------------------------------------------------------------------------*/