/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
-
+ Copyright (C) Dean Camera, 2011.
+
dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
+ www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
- Permission to use, copy, modify, distribute, and sell this
+ Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
+ without fee, 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
+ 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
/** \file
*
* Ethernet frame packet handling routines. This protocol handles the processing of raw Ethernet
- * frames sent and received, deferring the processing of subpacket protocols to the appropriate
+ * frames sent and received, deferring the processing of sub-packet protocols to the appropriate
* protocol handlers, such as DHCP or ARP.
*/
-
+
#include "Ethernet.h"
/** Constant for convenience when checking against or setting a MAC address to the virtual server MAC address. */
void Ethernet_ProcessPacket(Ethernet_Frame_Info_t* const FrameIN,
Ethernet_Frame_Info_t* const FrameOUT)
{
- DecodeEthernetFrameHeader(FrameIN);
+ DecodeEthernetFrameHeader(FrameIN->FrameData);
/* Cast the incoming Ethernet frame to the Ethernet header type */
Ethernet_Frame_Header_t* FrameINHeader = (Ethernet_Frame_Header_t*)&FrameIN->FrameData;
Ethernet_Frame_Header_t* FrameOUTHeader = (Ethernet_Frame_Header_t*)&FrameOUT->FrameData;
-
+
int16_t RetSize = NO_RESPONSE;
-
+
/* Ensure frame is addressed to either all (broadcast) or the virtual webserver, and is a type II frame */
if ((MAC_COMPARE(&FrameINHeader->Destination, &ServerMACAddress) ||
MAC_COMPARE(&FrameINHeader->Destination, &BroadcastMACAddress)) &&
case ETHERTYPE_ARP:
RetSize = ARP_ProcessARPPacket(&FrameIN->FrameData[sizeof(Ethernet_Frame_Header_t)],
&FrameOUT->FrameData[sizeof(Ethernet_Frame_Header_t)]);
- break;
+ break;
case ETHERTYPE_IPV4:
RetSize = IP_ProcessIPPacket(FrameIN,
&FrameIN->FrameData[sizeof(Ethernet_Frame_Header_t)],
&FrameOUT->FrameData[sizeof(Ethernet_Frame_Header_t)]);
break;
}
-
+
/* Protocol processing routine has filled a response, complete the ethernet frame header */
if (RetSize > 0)
{
FrameOUTHeader->Source = ServerMACAddress;
FrameOUTHeader->Destination = FrameINHeader->Source;
FrameOUTHeader->EtherType = FrameINHeader->EtherType;
-
+
/* Set the response length in the buffer and indicate that a response is ready to be sent */
FrameOUT->FrameLength = (sizeof(Ethernet_Frame_Header_t) + RetSize);
- FrameOUT->FrameInBuffer = true;
}
}
if (RetSize != NO_PROCESS)
{
/* Clear the frame buffer */
- FrameIN->FrameInBuffer = false;
+ FrameIN->FrameLength = 0;
}
}
for (uint16_t CurrWord = 0; CurrWord < (Bytes >> 1); CurrWord++)
Checksum += Words[CurrWord];
-
+
while (Checksum & 0xFFFF0000)
Checksum = ((Checksum & 0xFFFF) + (Checksum >> 16));
-
+
return ~Checksum;
}
+