diff options
Diffstat (limited to 'Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c')
| -rw-r--r-- | Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c | 29 |
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; } + |