network_utilities.c

lan911的vhdl源代码

/******************************************************************************
* Copyright ?2004 Altera Corporation, San Jose, California, USA.             *
* All rights reserved. All use of this software and documentation is          *
* subject to the License Agreement located at the end of this file below.     *
*******************************************************************************
* Author - S. O'Reilly                                                        *
* Date - July 4, 2004                                                         *
* Module - network_utilities.c                                                *
*                                                                             *
* Based on Telnet example by JRK and lwIP & HTTP server ports by PRR          *
******************************************************************************/

/* 
 * Simple Socket Server (SSS) example. 
 * 
 * Please refer to the Nios II lwIP Tutorial documentation for details on this 
 * software example, as well as details on how to configure the lwIP TCP/IP 
 * networking stack and MicroC/OS-II Real-Time Operating System.  The Nios II
 * lwIP Tutorial, along with the rest of the Nios II documentation is published 
 * on the Altera web-site.  See: 
 * Start Menu -> Programs -> Nios II Development Kit -> Nios II Documentation.
 */
 
/*
 * Include files:
 * 
 *      <stdio.h>: Standard IO
 *     includes.h: This is the default MicroC/OS-II include file.
 * alt_lwip_dev.h: Defines lwIP stack initialization calls.
 *    alt_types.h: Nios II CPU data type definitions.
 *           io.h: Nios II CPU I/O access macro definitions.
 *       simple_socket_server.h: Our simple socket server app's declarations.
 * alt_error_handler.h: Altera Error Handler suite of development error 
 * handling functions.
 */
#include <stdio.h> 
#include <string.h> 
#include <ctype.h>
#include <alt_lwip_dev.h>
#include <alt_types.h>
#include <sys/alt_flash.h>
#include "includes.h"
#include "io.h"
#include "simple_socket_server.h"
#include "alt_error_handler.h"

/*
 * The "adapter" storage here is declared so that when lwIP calls the 
 * get_ip_addr() routine, the adapter struct will be populated with the 
 * network device (Ethernet MAC) that lwIP is currently trying to setup an IP
 * address for. This is later used in the dhcp_timeout_task() routine to 
 * determine if DHCP was successful for the particular adapter.
 */
struct netif* adapter;

/*
 * Handle to our Nios Development board LCD panel.
 */
FILE *LCDDevice;

/*
 * generate_and_store_mac_addr()
 * 
 * This routine is called when, upon program initialization, we discover
 * that there is no valid network settings (including MAC address) programmed
 * into flash memory at the last flash sector.  If it is not safe to use the 
 * contents of this last sector of flash, the user is prompted to
 * enter the serial number at the console.  A MAC address is then
 * generated using 0xFF followed by the last 2 bytes of the serial number 
 * appended to Altera's Vendor ID, an assigned MAC address range with the first
 * 3 bytes of 00:07:ED.  For example, if the Nios Development Board serial 
 * number is 040800017, the corresponding ethernet number generated will be
 * 00:07:ED:FF:8F:11.
 * 
 * It should be noted that this number, while unique, will likely differ from
 * the also unique (but now lost forever) MAC address programmed into the 
 * development board on the production line.
 * 
 * As we are erasing the entire flash sector, we'll re-program it with not
 * only the MAC address, but static IP, subnet, gateway, and "Use DHCP" 
 * sections. These fail-safe static settings are compatible with previous
 * Nios Ethernet designs, and allow the "factory-safe" design to behave 
 * as expected if the last flash sector is erased.
 */
err_t generate_and_store_mac_addr()
{
  err_t ret_code = ERR_IF;
  alt_u32 ser_num = 0;
  char serial_number[9], flash_content[32];
  alt_flash_fd* flash_handle;
  int i = 0;
  
  printf("Can't read the MAC address from your board (this probably means\n");
  printf("that your flash was erased). We will assign you a MAC address and\n");
  printf("static network settings\n\n");
  
  while(!ser_num)
  {
    printf("Please enter your 9-digit serial number. This is printed on a \n");
    printf("label under your Nios dev. board. The first 3 digits of the \n");
    printf("label are ASJ and the serial number follows this.\n -->");
    
    for(i=0; i<9; i++)
    {
      serial_number[i] = getchar();
      putchar(serial_number[i]);
      
      /* Handle backspaces.  How civilized. */
      if ((serial_number[i] == 0x08) && (i >= 0)) 
      {
        i--;
      }
    }
    printf("\n");
            
    for(i=0; i<9; i++)
    {
      if (isdigit(serial_number[i]))
      {
        ser_num *= 10;
        ser_num += serial_number[i] - '0';
      }
      else
      {
        ser_num = 0;
        printf("Serial number only contains decimal digits and is non-zero\n");
        break;
      }
    }
    
    if (ser_num)
    {
      /* This says the image is safe */
      flash_content[0] = 0xfe;
      flash_content[1] = 0x5a;
      flash_content[2] = 0x0;
      flash_content[3] = 0x0;
      
      /* This is the Altera Vendor ID */
      flash_content[4] = 0x0;
      flash_content[5] = 0x7;
      flash_content[6] = 0xed;
      
      /* Reserverd Board identifier for erase boards */
      flash_content[7] = 0xFF;
      flash_content[8] = (ser_num & 0xff00) >> 8;
      flash_content[9] = ser_num & 0xff;

      /* Then comes a 16-bit "flags" field (not used with lwIP) */
      flash_content[10] = 0xFF;
      flash_content[11] = 0xFF;
      
      /* Then comes the static IP address */
      flash_content[12] = IPADDR0;
      flash_content[13] = IPADDR1;
      flash_content[14] = IPADDR2;
      flash_content[15] = IPADDR3;
      
      /* Then comes the static nameserver address (not used with lwIP)  */
      flash_content[16] = 0xFF;
      flash_content[17] = 0xFF;
      flash_content[18] = 0xFF;
      flash_content[19] = 0xFF;
      
      /* Then comes the static subnet mask */
      flash_content[20] = MSKADDR0;
      flash_content[21] = MSKADDR1;
      flash_content[22] = MSKADDR2;
      flash_content[23] = MSKADDR3;
      
      /* Then comes the static gateway address */
      flash_content[24] = GWADDR0;
      flash_content[25] = GWADDR1;
      flash_content[26] = GWADDR2;
      flash_content[27] = GWADDR3;
      
      /* And finally whether to use DHCP - set all bits to be safe */
      flash_content[28] = 0xFF;
      flash_content[29] = 0xFF;
      flash_content[30] = 0xFF;
      flash_content[31] = 0xFF;
      
      /* Write the MAC address to flash */
      /*
      flash_handle = alt_flash_open_dev(EXT_FLASH_NAME);
      if (flash_handle)
      {
        alt_write_flash(flash_handle, LAST_SECTOR_OFFSET, flash_content, 32);
        alt_flash_close_dev(flash_handle);
        ret_code = ERR_OK;
      }
      */
    }
  }
  return ret_code;    
}

/*
* get_mac_addr
*
* Read the MAC address in a board specific way
*
*/
err_t get_mac_addr(alt_lwip_dev* lwip_dev)
{
  err_t ret_code = ERR_OK;
  alt_u32 signature;
  struct netif* netif = lwip_dev->netif;

  netif->hwaddr[0] = 0x00;
  netif->hwaddr[1] = 0x88;
  netif->hwaddr[2] = 0x88;
  netif->hwaddr[3] = 0x5b;
  netif->hwaddr[4] = 0x93;
  netif->hwaddr[5] = 0x31;
  return ret_code;

#if defined(ALTERA_NIOS_EVAL_BOARD_CYCLONE_1C12) ||\
    defined(ALTERA_NIOS_DEV_BOARD_CYCLONE_2C35) ||\
    defined(ALTERA_NIOS_DEV_BOARD_STRATIX_1S10) ||\