diff options
Diffstat (limited to 'lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c')
| -rw-r--r-- | lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c b/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c deleted file mode 100644 index a48de2c717..0000000000 --- a/lib/lufa/Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - 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 - 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 disclaims 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 - * - * Ethernet frame packet handling routines. This protocol handles the processing of raw Ethernet - * 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. */ -Ethernet_Frame_Info_t FrameIN; - -/** Ethernet Frame buffer structure, to hold the outgoing Ethernet frame to the host. */ -Ethernet_Frame_Info_t FrameOUT; - -/** Constant for convenience when checking against or setting a MAC address to the virtual server MAC address. */ -const MAC_Address_t ServerMACAddress = {SERVER_MAC_ADDRESS}; - -/** Constant for convenience when checking against or setting an IP address to the virtual server IP address. */ -const IP_Address_t ServerIPAddress = {SERVER_IP_ADDRESS}; - -/** Constant for convenience when checking against or setting a MAC address to the broadcast MAC address. */ -const MAC_Address_t BroadcastMACAddress = {BROADCAST_MAC_ADDRESS}; - -/** Constant for convenience when checking against or setting a IP address to the broadcast IP address. */ -const IP_Address_t BroadcastIPAddress = {BROADCAST_IP_ADDRESS}; - -/** Constant for convenience when checking against or setting an IP address to the client (host) IP address. */ -const IP_Address_t ClientIPAddress = {CLIENT_IP_ADDRESS}; - - -/** Processes an incoming Ethernet frame, and writes the appropriate response to the output Ethernet - * frame buffer if the sub protocol handlers create a valid response. - */ -void Ethernet_ProcessPacket(void) -{ - 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)) && - (SwapEndian_16(FrameIN.FrameLength) > ETHERNET_VER2_MINSIZE)) - { - /* Process the packet depending on its protocol */ - switch (SwapEndian_16(FrameINHeader->EtherType)) - { - case ETHERTYPE_ARP: - RetSize = ARP_ProcessARPPacket(&FrameIN.FrameData[sizeof(Ethernet_Frame_Header_t)], - &FrameOUT.FrameData[sizeof(Ethernet_Frame_Header_t)]); - 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) - { - /* Fill out the response Ethernet frame header */ - 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); - } - } - - /* Check if the packet was processed */ - if (RetSize != NO_PROCESS) - { - /* Clear the frame buffer */ - FrameIN.FrameLength = 0; - } -} - -/** Calculates the appropriate ethernet checksum, consisting of the addition of the one's - * compliment of each word, complimented. - * - * \param[in] Data Pointer to the packet buffer data whose checksum must be calculated - * \param[in] Bytes Number of bytes in the data buffer to process - * - * \return A 16-bit Ethernet checksum value - */ -uint16_t Ethernet_Checksum16(void* Data, - uint16_t Bytes) -{ - uint16_t* Words = (uint16_t*)Data; - uint32_t Checksum = 0; - - for (uint16_t CurrWord = 0; CurrWord < (Bytes >> 1); CurrWord++) - Checksum += Words[CurrWord]; - - while (Checksum & 0xFFFF0000) - Checksum = ((Checksum & 0xFFFF) + (Checksum >> 16)); - - return ~Checksum; -} - |