Reboot.c

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// ////////////////////////////////////////////////////////////////////////////
// ////////////////////////////////////////////////////////////////////////////
/*********************************************************************
 * Software License Agreement
 *
 * Copyright (C) 2002-2008 Microchip Technology Inc.  All rights 
 * reserved.
 *
 * Microchip licenses to you the right to use, modify, copy, and 
 * distribute: 
 * (i)  the Software when embedded on a Microchip microcontroller or 
 *      digital signal controller product ("Device") which is 
 *      integrated into Licensee's product; or
 * (ii) ONLY the Software driver source files ENC28J60.c and 
 *      ENC28J60.h ported to a non-Microchip device used in 
 *      conjunction with a Microchip ethernet controller for the 
 *      sole purpose of interfacing with the ethernet controller. 
 *
 * You should refer to the license agreement accompanying this 
 * Software for additional information regarding your rights and 
 * obligations.
 *
 * THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT 
 * WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT 
 * LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A 
 * PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL 
 * MICROCHIP BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR 
 * CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF 
 * PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS 
 * BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE 
 * THEREOF), ANY CLAIMS FOR INDEMNITY OR CONTRIBUTION, OR OTHER 
 * SIMILAR COSTS, WHETHER ASSERTED ON THE BASIS OF CONTRACT, TORT 
 * (INCLUDING NEGLIGENCE), BREACH OF WARRANTY, OR OTHERWISE.
 *
 *
 * Author               Date        Comment
 *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Howard Schlunder     02/22/07    Original
 ********************************************************************/
#define __REBOOT_C

#include "TCPIP.h"

#define REBOOT_PORT     69  // UDP TFTP port


// For improved security, you might want to limit reboot capabilities 
// to only users on the same IP subnet.  Define REBOOT_SAME_SUBNET_ONLY 
// to enable this access restriction.
#define REBOOT_SAME_SUBNET_ONLY


/*********************************************************************
 * Function:        void RebootTask(void)
 *
 * PreCondition:    Stack is initialized()
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        Checks for incomming traffic on port 69.  
 *
 * Note:            This module is primarily for use with the 
 *                  Ethernet bootloader.  By resetting, the Ethernet 
 *                  bootloader can take control for a second and let
 *                  a firmware upgrade take place.
 ********************************************************************/
void RebootTask(void)
{
    static UDP_SOCKET   MySocket = INVALID_UDP_SOCKET;
    
    if(MySocket == INVALID_UDP_SOCKET)
        MySocket = UDPOpen(REBOOT_PORT, NULL, INVALID_UDP_PORT);

    if(MySocket == INVALID_UDP_SOCKET)
        return;

    // Do nothing if no data is waiting
    if(!UDPIsGetReady(MySocket))
    {
        return;
    }

    u16GlobalFlags |= BOOTLOADER_MASK;
    ApplRestart(FALSE);
}

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