cpu/6502/net/ethernet-drv.c

   1 /*
   2  * Copyright (c) 2007, Swedish Institute of Computer Science
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the Institute nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * This file is part of the Contiki operating system.
  30  *
  31  * @(#)$Id: ethernet-drv.c,v 1.3 2010/10/19 18:29:04 adamdunkels Exp $
  32  */
  33
  34 #include <stdio.h>
  35
  36 #include "contiki-net.h"
  37 #include "net/ethernet.h"
  38 #include "net/uip-neighbor.h"
  39
  40 #include "net/ethernet-drv.h"
  41
  42 #define BUF ((struct uip_eth_hdr *)&uip_buf[0])
  43
  44 PROCESS(ethernet_process, "Ethernet driver");
  45
  46 /*---------------------------------------------------------------------------*/
  47 u8_t
  48 ethernet_output(void)
  49 {
  50   uip_arp_out();
  51   ethernet_send();
  52
  53   return 0;
  54 }
  55 /*---------------------------------------------------------------------------*/
  56 static void
  57 pollhandler(void)
  58 {
  59   process_poll(&ethernet_process);
  60   uip_len = ethernet_poll();
  61
  62   if(uip_len > 0) {
  63 #if UIP_CONF_IPV6
  64     if(BUF->type == uip_htons(UIP_ETHTYPE_IPV6)) {
  65       uip_neighbor_add(&IPBUF->srcipaddr, &BUF->src);
  66       tcpip_input();
  67     } else
  68 #endif /* UIP_CONF_IPV6 */
  69     if(BUF->type == uip_htons(UIP_ETHTYPE_IP)) {
  70       uip_len -= sizeof(struct uip_eth_hdr);
  71       tcpip_input();
  72     } else if(BUF->type == uip_htons(UIP_ETHTYPE_ARP)) {
  73       uip_arp_arpin();
  74       /* If the above function invocation resulted in data that
  75          should be sent out on the network, the global variable
  76          uip_len is set to a value > 0. */
  77       if(uip_len > 0) {
  78         ethernet_send();
  79       }
  80     }
  81   }
  82 }
  83 /*---------------------------------------------------------------------------*/
  84 PROCESS_THREAD(ethernet_process, ev, data)
  85 {
  86   PROCESS_POLLHANDLER(pollhandler());
  87
  88   PROCESS_BEGIN();
  89
  90   ethernet_init((struct ethernet_config *)data);
  91
  92   tcpip_set_outputfunc(ethernet_output);
  93
  94   process_poll(&ethernet_process);
  95
  96   PROCESS_WAIT_UNTIL(ev == PROCESS_EVENT_EXIT);
  97
  98   ethernet_exit();
  99
 100   PROCESS_END();
 101 }
 102 /*---------------------------------------------------------------------------*/