servers/lwip/eth.c

   1 /**
   2  * @file
   3  * Ethernet Interface Skeleton
   4  *
   5  */
   6
   7 /*
   8  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without modification,
  12  * are permitted provided that the following conditions are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright notice,
  15  *    this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright notice,
  17  *    this list of conditions and the following disclaimer in the documentation
  18  *    and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  25  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  26  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  27  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  30  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  31  * OF SUCH DAMAGE.
  32  *
  33  * This file is part of the lwIP TCP/IP stack.
  34  *
  35  * Author: Adam Dunkels <adam@sics.se>
  36  *
  37  */
  38
  39 /*
  40  * This file is a skeleton for developing Ethernet network interface
  41  * drivers for lwIP. Add code to the low_level functions and do a
  42  * search-and-replace for the word "ethernetif" to replace it with
  43  * something that better describes your network interface.
  44  */
  45
  46 #include <minix/sysutil.h>
  47
  48 #include "lwip/opt.h"
  49
  50 #include "lwip/def.h"
  51 #include "lwip/mem.h"
  52 #include "lwip/pbuf.h"
  53 #include "lwip/sys.h"
  54 #include <lwip/stats.h>
  55 #include <lwip/snmp.h>
  56 #include <netif/etharp.h>
  57
  58 #include <net/gen/ether.h>
  59 #include <net/gen/eth_io.h>
  60
  61 #include "proto.h"
  62 #include "driver.h"
  63
  64 extern endpoint_t lwip_ep;
  65
  66 static err_t low_level_output(__unused struct netif *netif, struct pbuf *pbuf)
  67 {
  68         struct nic * nic;
  69
  70         nic = (struct nic *) netif->state;
  71         assert(&nic->netif == netif);
  72
  73         debug_print("device /dev/%s", nic->name);
  74
  75         if (driver_tx_enqueue(nic, pbuf) != OK)
  76                 return ERR_MEM;
  77
  78         /* if the driver is idle, start transmitting the packet */
  79         if (nic->state == DRV_IDLE) {
  80                 if (!driver_tx(nic))
  81                         return ERR_MEM;
  82         }
  83
  84         return ERR_OK;
  85 }
  86
  87 static void low_level_init(struct netif *netif)
  88 {
  89         message m;
  90         struct nic * nic = (struct nic *) netif->state;
  91
  92         assert(nic);
  93
  94         /* set MAC hardware address length */
  95         netif->hwaddr_len = ETHARP_HWADDR_LEN;
  96
  97         /* maximum transfer unit */
  98         netif->mtu = 1500;
  99         nic->max_pkt_sz = ETH_MAX_PACK_SIZE;
 100         nic->min_pkt_sz = ETH_MIN_PACK_SIZE;
 101
 102         /* device capabilities */
 103         netif->flags = NETIF_FLAG_ETHARP;
 104
 105         m.DL_MODE = DL_NOMODE;
 106         if (nic->flags & NWEO_EN_BROAD)
 107                 m.DL_MODE |= DL_BROAD_REQ;
 108         if (nic->flags & NWEO_EN_MULTI)
 109                 m.DL_MODE |= DL_MULTI_REQ;
 110         if (nic->flags & NWEO_EN_PROMISC)
 111                 m.DL_MODE |= DL_PROMISC_REQ;
 112
 113         m.m_type = DL_CONF;
 114
 115         if (asynsend(((struct nic *)netif->state)->drv_ep , &m) != OK)
 116                 printf("LWIP : ERROR cannot send DL_CONF to driver\n");
 117 }
 118
 119
 120 err_t ethernetif_init(struct netif *netif)
 121 {
 122         /*
 123          * Initialize the snmp variables and counters inside the struct netif.
 124          * The last argument should be replaced with your link speed, in units
 125          * of bits per second.
 126         NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
 127          */
 128
 129         netif->output = etharp_output;
 130         netif->linkoutput = low_level_output;
 131
 132         /* initialize the hardware */
 133         low_level_init(netif);
 134
 135         return ERR_OK;
 136 }