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-rw-r--r--Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c b/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c
index 0b9563347..0b74d9cbc 100644
--- a/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c
+++ b/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c
@@ -1,7 +1,7 @@
/*
LUFA Library
Copyright (C) Dean Camera, 2010.
-
+
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
@@ -9,13 +9,13 @@
/*
Copyright 2010 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
@@ -34,7 +34,7 @@
* frames sent and received, deferring the processing of sub-packet protocols to the appropriate
* protocol handlers, such as DHCP or ARP.
*/
-
+
#include "Ethernet.h"
/** Ethernet Frame buffer structure, to hold the incoming Ethernet frame from the host. */
@@ -69,9 +69,9 @@ void Ethernet_ProcessPacket(void)
/* 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)) &&
@@ -83,13 +83,13 @@ void Ethernet_ProcessPacket(void)
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.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)
{
@@ -97,7 +97,7 @@ void Ethernet_ProcessPacket(void)
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;
@@ -128,9 +128,10 @@ uint16_t Ethernet_Checksum16(void* Data,
for (uint16_t CurrWord = 0; CurrWord < (Bytes >> 1); CurrWord++)
Checksum += Words[CurrWord];
-
+
while (Checksum & 0xFFFF0000)
Checksum = ((Checksum & 0xFFFF) + (Checksum >> 16));
-
+
return ~Checksum;
}
+