-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2009.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\r
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, and distribute this software\r
- and its documentation for any purpose and without fee is hereby\r
- granted, provided that the above copyright notice appear in all\r
- copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting\r
- documentation, and that the name of the author not be used in\r
- advertising or publicity pertaining to distribution of the\r
- software without specific, written prior permission.\r
-\r
- The author disclaim all warranties with regard to this\r
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\r
- this software.\r
-*/\r
-\r
-/** \file\r
- *\r
- * Address Resolution Protocol (ARP) packet handling routines. This protocol handles the\r
- * conversion of physical MAC addresses to protocol IP addresses between the host and the\r
- * device.\r
- */\r
- \r
-#include "ARP.h"\r
-\r
-/** Processes an ARP packet inside an Ethernet frame, and writes the appropriate response\r
- * to the output Ethernet frame if the host is requesting the IP or MAC address of the\r
- * virtual server device on the network.\r
- *\r
- * \param InDataStart Pointer to the start of the incoming packet's ARP header\r
- * \param OutDataStart Pointer to the start of the outgoing packet's ARP header\r
- *\r
- * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise\r
- */\r
-int16_t ARP_ProcessARPPacket(void* InDataStart, void* OutDataStart)\r
-{\r
- DecodeARPHeader(InDataStart);\r
-\r
- ARP_Header_t* ARPHeaderIN = (ARP_Header_t*)InDataStart;\r
- ARP_Header_t* ARPHeaderOUT = (ARP_Header_t*)OutDataStart;\r
-\r
- /* Ensure that the ARP request is a IPv4 request packet */\r
- if ((SwapEndian_16(ARPHeaderIN->ProtocolType) == ETHERTYPE_IPV4) &&\r
- (SwapEndian_16(ARPHeaderIN->Operation) == ARP_OPERATION_REQUEST))\r
- {\r
- /* If the ARP packet is requesting the MAC or IP of the virtual webserver, return the response */\r
- if (IP_COMPARE(&ARPHeaderIN->TPA, &ServerIPAddress) || \r
- MAC_COMPARE(&ARPHeaderIN->THA, &ServerMACAddress))\r
- {\r
- /* Fill out the ARP response header */\r
- ARPHeaderOUT->HardwareType = ARPHeaderIN->HardwareType;\r
- ARPHeaderOUT->ProtocolType = ARPHeaderIN->ProtocolType;\r
- ARPHeaderOUT->HLEN = ARPHeaderIN->HLEN;\r
- ARPHeaderOUT->PLEN = ARPHeaderIN->PLEN;\r
- ARPHeaderOUT->Operation = SwapEndian_16(ARP_OPERATION_REPLY);\r
-\r
- /* Copy over the sender MAC/IP to the target fields for the response */\r
- ARPHeaderOUT->THA = ARPHeaderIN->SHA;\r
- ARPHeaderOUT->TPA = ARPHeaderIN->SPA;\r
-\r
- /* Copy over the new sender MAC/IP - MAC and IP addresses of the virtual webserver */\r
- ARPHeaderOUT->SHA = ServerMACAddress;\r
- ARPHeaderOUT->SPA = ServerIPAddress;\r
-\r
- /* Return the size of the response so far */\r
- return sizeof(ARP_Header_t);\r
- }\r
- }\r
- \r
- return NO_RESPONSE;\r
-}\r
+/*
+ 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;
+}
+
projects / pub / USBasp.git / blobdiff