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17 results

MassStorage.c

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    • Dean Camera's avatar
      c5038f1b
      Renamed all library events to properly seperate out Device and Host mode... · c5038f1b
      Dean Camera authored
      Renamed all library events to properly seperate out Device and Host mode events. Changed the firing conditions for some events to ensure that events are fired by their own USB mode only.
      
      Remove VBUS events - not needed as the library takes care of VBUS detection and feedback on supported AVRs via the USB_Device_Connected and USB_Device_Disconnected events.
      
      Fixed incorrect Host state assignment in the incomplete BluetoothHost demo.
      c5038f1b
      History
      Renamed all library events to properly seperate out Device and Host mode...
      Dean Camera authored
      Renamed all library events to properly seperate out Device and Host mode events. Changed the firing conditions for some events to ensure that events are fired by their own USB mode only.
      
      Remove VBUS events - not needed as the library takes care of VBUS detection and feedback on supported AVRs via the USB_Device_Connected and USB_Device_Disconnected events.
      
      Fixed incorrect Host state assignment in the incomplete BluetoothHost demo.
    ICMP.c 3.07 KiB
    /*
                 LUFA Library
         Copyright (C) Dean Camera, 2009.
                  
      dean [at] fourwalledcubicle [dot] com
          www.fourwalledcubicle.com
    */
    
    /*
      Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
    
      Permission to use, copy, modify, and distribute this software
      and its documentation for any purpose and without fee is hereby
      granted, provided that the above copyright notice appear in all
      copies and that both that the copyright notice and this
      permission notice and warranty disclaimer appear in supporting
      documentation, and that the name of the author not be used in
      advertising or publicity pertaining to distribution of the
      software without specific, written prior permission.
    
      The author disclaim all warranties with regard to this
      software, including all implied warranties of merchantability
      and fitness.  In no event shall the author be liable for any
      special, indirect or consequential damages or any damages
      whatsoever resulting from loss of use, data or profits, whether
      in an action of contract, negligence or other tortious action,
      arising out of or in connection with the use or performance of
      this software.
    */
    
    /** \file
     *
     *  Internet Control Message Protocol (ICMP) packet handling routines. This protocol handles
     *  Echo requests from the host, to indicate a successful network connection between the host
     *  and the virtual server.
     */
     
    #include "ICMP.h"
    
    /** Processes an ICMP packet inside an Ethernet frame, and writes the appropriate response
     *  to the output Ethernet frame if the host is issuing a ICMP ECHO request.
     *
     *  \param InDataStart   Pointer to the start of the incoming packet's ICMP header
     *  \param OutDataStart  Pointer to the start of the outgoing packet's ICMP header
     *
     *  \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise
     */
    int16_t ICMP_ProcessICMPPacket(void* InDataStart, void* OutDataStart)
    {
    	ICMP_Header_t* ICMPHeaderIN  = (ICMP_Header_t*)InDataStart;
    	ICMP_Header_t* ICMPHeaderOUT = (ICMP_Header_t*)OutDataStart;
    
    	DecodeICMPHeader(InDataStart);
    
    	/* Determine if the ICMP packet is an echo request (ping) */
    	if (ICMPHeaderIN->Type == ICMP_TYPE_ECHOREQUEST)
    	{
    		/* Fill out the ICMP response packet */
    		ICMPHeaderOUT->Type     = ICMP_TYPE_ECHOREPLY;
    		ICMPHeaderOUT->Code     = 0;
    		ICMPHeaderOUT->Checksum = 0;
    		ICMPHeaderOUT->Id       = ICMPHeaderIN->Id;
    		ICMPHeaderOUT->Sequence = ICMPHeaderIN->Sequence;
    		
    		uint16_t DataSize = FrameIN.FrameLength - ((((uint16_t)InDataStart + sizeof(ICMP_Header_t)) - (uint16_t)FrameIN.FrameData));
    		
    		/* Copy the remaining payload to the response - echo requests should echo back any sent data */
    		memcpy(&((uint8_t*)OutDataStart)[sizeof(ICMP_Header_t)],
    		       &((uint8_t*)InDataStart)[sizeof(ICMP_Header_t)],
    			   DataSize);
    
    		ICMPHeaderOUT->Checksum = Ethernet_Checksum16(ICMPHeaderOUT, (DataSize + sizeof(ICMP_Header_t)));
    
    		/* Return the size of the response so far */
    		return (DataSize + sizeof(ICMP_Header_t));
    	}
    	
    	return NO_RESPONSE;
    }