X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/b9b03aadb219d06fbad9d110e508db93e45461af..a9abe1fdea5ccf67aaccab6fdde300d6fcf2d15a:/Demos/Device/ClassDriver/RNDISEthernet/Lib/ARP.c diff --git a/Demos/Device/ClassDriver/RNDISEthernet/Lib/ARP.c b/Demos/Device/ClassDriver/RNDISEthernet/Lib/ARP.c index 0f108c290..702382545 100644 --- a/Demos/Device/ClassDriver/RNDISEthernet/Lib/ARP.c +++ b/Demos/Device/ClassDriver/RNDISEthernet/Lib/ARP.c @@ -1,85 +1,87 @@ -/* - 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 - * - * Address Resolution Protocol (ARP) packet handling routines. This protocol handles the - * conversion of physical MAC addresses to protocol IP addresses between the host and the - * device. - */ - -#include "ARP.h" - -/** Processes an ARP packet inside an Ethernet frame, and writes the appropriate response - * to the output Ethernet frame if the host is requesting the IP or MAC address of the - * virtual server device on the network. - * - * \param InDataStart Pointer to the start of the incoming packet's ARP header - * \param OutDataStart Pointer to the start of the outgoing packet's ARP header - * - * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise - */ -int16_t ARP_ProcessARPPacket(void* InDataStart, void* OutDataStart) -{ - DecodeARPHeader(InDataStart); - - ARP_Header_t* ARPHeaderIN = (ARP_Header_t*)InDataStart; - ARP_Header_t* ARPHeaderOUT = (ARP_Header_t*)OutDataStart; - - /* Ensure that the ARP request is a IPv4 request packet */ - if ((SwapEndian_16(ARPHeaderIN->ProtocolType) == ETHERTYPE_IPV4) && - (SwapEndian_16(ARPHeaderIN->Operation) == ARP_OPERATION_REQUEST)) - { - /* If the ARP packet is requesting the MAC or IP of the virtual webserver, return the response */ - if (IP_COMPARE(&ARPHeaderIN->TPA, &ServerIPAddress) || - MAC_COMPARE(&ARPHeaderIN->THA, &ServerMACAddress)) - { - /* Fill out the ARP response header */ - ARPHeaderOUT->HardwareType = ARPHeaderIN->HardwareType; - ARPHeaderOUT->ProtocolType = ARPHeaderIN->ProtocolType; - ARPHeaderOUT->HLEN = ARPHeaderIN->HLEN; - ARPHeaderOUT->PLEN = ARPHeaderIN->PLEN; - ARPHeaderOUT->Operation = SwapEndian_16(ARP_OPERATION_REPLY); - - /* Copy over the sender MAC/IP to the target fields for the response */ - ARPHeaderOUT->THA = ARPHeaderIN->SHA; - ARPHeaderOUT->TPA = ARPHeaderIN->SPA; - - /* Copy over the new sender MAC/IP - MAC and IP addresses of the virtual webserver */ - ARPHeaderOUT->SHA = ServerMACAddress; - ARPHeaderOUT->SPA = ServerIPAddress; - - /* Return the size of the response so far */ - return sizeof(ARP_Header_t); - } - } - - return NO_RESPONSE; -} +/* + LUFA Library + Copyright (C) Dean Camera, 2012. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2012 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 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 + * + * Address Resolution Protocol (ARP) packet handling routines. This protocol handles the + * conversion of physical MAC addresses to protocol IP addresses between the host and the + * device. + */ + +#include "ARP.h" + +/** Processes an ARP packet inside an Ethernet frame, and writes the appropriate response + * to the output Ethernet frame if the host is requesting the IP or MAC address of the + * virtual server device on the network. + * + * \param[in] InDataStart Pointer to the start of the incoming packet's ARP header + * \param[out] OutDataStart Pointer to the start of the outgoing packet's ARP header + * + * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise + */ +int16_t ARP_ProcessARPPacket(void* InDataStart, + void* OutDataStart) +{ + DecodeARPHeader(InDataStart); + + ARP_Header_t* ARPHeaderIN = (ARP_Header_t*)InDataStart; + ARP_Header_t* ARPHeaderOUT = (ARP_Header_t*)OutDataStart; + + /* Ensure that the ARP request is a IPv4 request packet */ + if ((SwapEndian_16(ARPHeaderIN->ProtocolType) == ETHERTYPE_IPV4) && + (SwapEndian_16(ARPHeaderIN->Operation) == ARP_OPERATION_REQUEST)) + { + /* If the ARP packet is requesting the MAC or IP of the virtual webserver, return the response */ + if (IP_COMPARE(&ARPHeaderIN->TPA, &ServerIPAddress) || + MAC_COMPARE(&ARPHeaderIN->THA, &ServerMACAddress)) + { + /* Fill out the ARP response header */ + ARPHeaderOUT->HardwareType = ARPHeaderIN->HardwareType; + ARPHeaderOUT->ProtocolType = ARPHeaderIN->ProtocolType; + ARPHeaderOUT->HLEN = ARPHeaderIN->HLEN; + ARPHeaderOUT->PLEN = ARPHeaderIN->PLEN; + ARPHeaderOUT->Operation = SwapEndian_16(ARP_OPERATION_REPLY); + + /* Copy over the sender MAC/IP to the target fields for the response */ + ARPHeaderOUT->THA = ARPHeaderIN->SHA; + ARPHeaderOUT->TPA = ARPHeaderIN->SPA; + + /* Copy over the new sender MAC/IP - MAC and IP addresses of the virtual webserver */ + ARPHeaderOUT->SHA = ServerMACAddress; + ARPHeaderOUT->SPA = ServerIPAddress; + + /* Return the size of the response so far */ + return sizeof(ARP_Header_t); + } + } + + return NO_RESPONSE; +} +