tftpnaive.c

来自「2410 boot loader,usb ftp」· C语言 代码 · 共 126 行

/*
	Copyright 2001-2004 Georges Menie (www.menie.org)

	This file is part of Tftpnaive.

    Tftpnaive is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    Tftpnaive is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with Tftpnaive; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "tftpnaive.h"
#include "baselib.h"
#include "timer.h"

#define RETRYCOUNT		5

extern unsigned int downloadFileSize;

#if TFTPNAIVE_TIMEREQUEST
static void getTime ()
{
	int ts, h, m, s;
	
	/* send a timestamp request to the TFTP server,
	 * to get it's GMT time of the day */
	if (tftp_req) {
		if ((ts = netTimestampRequest (tftp_req->server)) != 0) {
			ts = (ts + 500) / 1000;	/* round to secs */
			h = (ts / 3600) % 24;
			m = (ts / 60) % 60;
			s = ts % 60;
			setTime (h, m, s);
			Uart_Printf ("GMT time is %d:%d:%d\n", h, m, s);
		}
	}
}
#endif

int tftpnaive (TFTPDownload *tftp)
{
	int error;
	int retry=RETRYCOUNT, crcretry=RETRYCOUNT;
	
	downloadFileSize = 0;

crcretry_again:	
	Uart_Printf("\n");
	
	timerInit ();

	/* initialize the network chip, loop until it's ready */
	while (((error = netUp (tftp->mac)) != 0) && retry) {
		if (error != ERR_LINK)
			Uart_Printf ("Network interface init failed: code %d\n", error);
		else
			Uart_Printf ("No network, cable problem ?\n");
		usleep (1000000);
	
	retry--;
	}

    if(!retry) goto fail;
    else retry=RETRYCOUNT;

	while (retry) {
		/* request an IP address through BOOTP */
		
		if(tftp->mode==1) // BOOTP + TFTP
		 netRequestIP ();
		else // TFTP
		 directBOOTP(tftp->local_ip, tftp->remote_ip, tftp->file);

#if TFTPNAIVE_TIMEREQUEST
		getTime ();
#endif
		/* bootstrap using TFTP */
		
		if (netBoot (tftp->downaddr) == 0)
			break;
	  
	  usleep (1000000);		
	  retry--;		
	}

	/* shutdown the network chip */
	netDown ();

	/* if the download is successfull and
	 * a start address has been given, jump to it
	 */
    Led_Display(15);

fail:	 
    if(downloadFileSize==0xffffffff)
    {
     if(crcretry)
     {	
      Uart_Printf("CRC Error, Retry...\n");
      crcretry--;
      goto crcretry_again;
     }
     else
      downloadFileSize = 0; 	
    }
	else if (downloadFileSize==0)
	{
	 Uart_Printf("Download Failed!!!\n");
     return -1;
    }

	return 0;
}