network_utilities.c

lan911的vhdl源代码

    defined(ALTERA_NIOS_DEV_BOARD_STRATIX_1S10_ES) ||\
    defined(ALTERA_NIOS_DEV_BOARD_STRATIX_2S60_ES) ||\
    defined(ALTERA_NIOS_DEV_BOARD_STRATIX_1S40) || \
    defined(ALTERA_DSP_DEV_BOARD_STRATIX_2S60_ES)
  signature = IORD_32DIRECT(LAST_FLASH_SECTOR, 0);
  
/* This LAST_FLASH_SECTOR region of flash is examined to see if 
 * valid network settings are present, indicated by a signature of 0x00005afe at 
 * the first address of the last flash sector.  This hex value is chosen as the 
 * signature since it looks like the english word "SAFE", meaning that it is 
 * safe to use these network address values.  
*/
  if (signature != 0x00005afe)
  {
    ret_code = generate_and_store_mac_addr();
  }
  
  if (ret_code == ERR_OK)
  {
    netif->hwaddr[0] = IORD_8DIRECT(LAST_FLASH_SECTOR, 4);
    netif->hwaddr[1] = IORD_8DIRECT(LAST_FLASH_SECTOR, 5);
    netif->hwaddr[2] = IORD_8DIRECT(LAST_FLASH_SECTOR, 6);
    netif->hwaddr[3] = IORD_8DIRECT(LAST_FLASH_SECTOR, 7);
    netif->hwaddr[4] = IORD_8DIRECT(LAST_FLASH_SECTOR, 8);
    netif->hwaddr[5] = IORD_8DIRECT(LAST_FLASH_SECTOR, 9);
    
    printf("Your Ethernet MAC address is %02x:%02x:%02x:%02x:%02x:%02x\n", 
            netif->hwaddr[0],
            netif->hwaddr[1],
            netif->hwaddr[2],
            netif->hwaddr[3],
            netif->hwaddr[4],
            netif->hwaddr[5]);

  }
#else
  ret_code = ERR_IF;

  perror( "Not an Altera Nios Development Board.\n");
  perror( "You need to modify the function get_mac_addr \n");
  perror( "to set a MAC address for your board");
#endif

  return ret_code;
}

/*
 * get_ip_addr()
 * 
 * This routine is called by lwIP to obtain an IP address for the specified 
 * network adapter. Like the MAC address, obtaining an IP address is very
 * system-dependant and therefore this function is exported for the developer
 * to control.
 * 
 * In our system, we are either attempting DHCP auto-negotiation of IP address,
 * or we are setting our own static IP, Gateway, and Subnet Mask addresses our
 * self. This routine is where that happens.
 */
int get_ip_addr(alt_lwip_dev* lwip_dev, struct ip_addr* ipaddr, 
                struct ip_addr* netmask, struct ip_addr* gw,
                int* use_dhcp)
{
  int ret_code = 0;  


    IP4_ADDR(ipaddr, IPADDR0,IPADDR1,IPADDR2,IPADDR3);
    IP4_ADDR(gw, GWADDR0,GWADDR1,GWADDR2,GWADDR3);
    IP4_ADDR(netmask, MSKADDR0,MSKADDR1,MSKADDR2,MSKADDR3);
    *use_dhcp = 0;

    printf("Static IP Address is %d.%d.%d.%d\n", 
        ip4_addr1(ipaddr),
        ip4_addr2(ipaddr),
        ip4_addr3(ipaddr),
        ip4_addr4(ipaddr));

   ret_code = 1;
   return ret_code;
}

/*
 * NETUTILSDHCPTimeoutTask()
 * 
 * This lwIP-called routine is responsible for checking to see whether DHCP 
 * was successful. Here we check to see whether a timeout (120 seconds in this
 * case) has elapsed. If so, display an error, assign a static IP address, and 
 * bail out. If not, continue checking for DHCP success and bail out once
 * a DHCP address assignment is complete.
 * 
 * This routine also displays the assigned IP address to the user (via STDOUT 
 * and, if equipped, LCD screen.
 * 
 * Note: LCD_DISPLAY_NAME is defined in telnet.h to be the LCD interface for
 *       the "standard" and "full-featured" example designs.
 */
#if LWIP_DHCP == 1
void NETUTILSDHCPTimeoutTask()
{
  int have_address = 0, timeout_dhcp = 0;
  struct ip_addr ipaddr, netmask, gw;
  INT8U error_code;
  
  error_code = OS_NO_ERR;
  
  while(1)
  {
    OSTimeDlyHMSM(0,0,0,100);

    /* 
     * For demo purposes we need to use DHCP to allocate an IP Address
     * and lwIP had no mechanism to tell us one is allocated. Wait two 
     * minutes if we don't have one we use a static IP address
     */
    if((timeout_dhcp < DHCP_TIMEOUT) && (have_address == 0))
    {
      timeout_dhcp++;
      if (!ip_addr_isany(&adapter->ip_addr))
      {
        have_address = 1;
        printf("Assigned IP Address is %d.%d.%d.%d\n\n",
                ip4_addr1(&adapter->ip_addr),
                ip4_addr2(&adapter->ip_addr),
                ip4_addr3(&adapter->ip_addr),
                ip4_addr4(&adapter->ip_addr));

#ifdef LCD_DISPLAY_NAME        
        /* Clear screen */
        fprintf(LCDDevice, "\x1b");
        fprintf(LCDDevice, "[2J");
        fprintf(LCDDevice, "DHCP IP Addr is \n %d.%d.%d.%d",
                ip4_addr1(&adapter->ip_addr),
                ip4_addr2(&adapter->ip_addr),
                ip4_addr3(&adapter->ip_addr),
                ip4_addr4(&adapter->ip_addr));
#endif /* LCD_DISPLAY_NAME */
      }
    }
    /*
     * You're in a bit of trouble if this happens, you could assign a static
     * IP address but how do we chose it?
     */
    if (timeout_dhcp ==  DHCP_TIMEOUT)
    {
      dhcp_stop(adapter);
      IP4_ADDR(&ipaddr, IPADDR0,IPADDR1,IPADDR2,IPADDR3);
      IP4_ADDR(&gw, GWADDR0,GWADDR1,GWADDR2,GWADDR3);
      IP4_ADDR(&netmask, MSKADDR0,MSKADDR1,MSKADDR2,MSKADDR3);
      
      netif_set_addr( adapter,&ipaddr, &netmask, &gw);
      
      printf("DHCP Failed to assign an IP Address\n\n"); 
      printf("\nUsing static address: %d.%d.%d.%d\n\n\n",
        ip4_addr1(&adapter->ip_addr),
        ip4_addr2(&adapter->ip_addr),
        ip4_addr3(&adapter->ip_addr),
        ip4_addr4(&adapter->ip_addr));

#ifdef LCD_DISPLAY_NAME  
      /* Clear the LCD screen */
      fprintf(LCDDevice, "\x1b");
      fprintf(LCDDevice, "[2J");
      fprintf(LCDDevice, "DHCP Failed using\n %d.%d.%d.%d",
        ip4_addr1(&adapter->ip_addr),
        ip4_addr2(&adapter->ip_addr),
        ip4_addr3(&adapter->ip_addr),
        ip4_addr4(&adapter->ip_addr));
#endif /* LCD_DISPLAY_NAME */
      have_address = 1;
    }
    
    if (have_address == 1)
    {
      /* 
       * We have an IP address this task has served it's purpose - kill it.
       */
#ifdef LCD_DISPLAY_NAME        
       fclose(LCDDevice);
#endif /* LCD_DISPLAY_NAME */
       error_code = OSSemPost(SSSAttainedIPAddressSem);
       alt_uCOSIIErrorHandler(error_code, 0);

       OSTaskDel(OS_PRIO_SELF);
    }
  }
}
#endif /* LWIP_DHCP */


/******************************************************************************
*                                                                             *
* License Agreement                                                           *
*                                                                             *
* Copyright (c) 2004 Altera Corporation, San Jose, California, USA.           *
* All rights reserved.                                                        *
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