-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2010.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\r
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, distribute, and sell this \r
- software and its documentation for any purpose is hereby granted\r
- without fee, provided that the above copyright notice appear in \r
- all 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
- * Internet Control Message Protocol (ICMP) packet handling routines. This protocol handles\r
- * Echo requests from the host, to indicate a successful network connection between the host\r
- * and the virtual server.\r
- */\r
- \r
-#include "ICMP.h"\r
-\r
-/** Processes an ICMP packet inside an Ethernet frame, and writes the appropriate response\r
- * to the output Ethernet frame if the host is issuing a ICMP ECHO request.\r
- *\r
- * \param[in] InDataStart Pointer to the start of the incoming packet's ICMP header\r
- * \param[out] OutDataStart Pointer to the start of the outgoing packet's ICMP header\r
- *\r
- * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise\r
- */\r
-int16_t ICMP_ProcessICMPPacket(void* InDataStart, void* OutDataStart)\r
-{\r
- ICMP_Header_t* ICMPHeaderIN = (ICMP_Header_t*)InDataStart;\r
- ICMP_Header_t* ICMPHeaderOUT = (ICMP_Header_t*)OutDataStart;\r
-\r
- DecodeICMPHeader(InDataStart);\r
-\r
- /* Determine if the ICMP packet is an echo request (ping) */\r
- if (ICMPHeaderIN->Type == ICMP_TYPE_ECHOREQUEST)\r
- {\r
- /* Fill out the ICMP response packet */\r
- ICMPHeaderOUT->Type = ICMP_TYPE_ECHOREPLY;\r
- ICMPHeaderOUT->Code = 0;\r
- ICMPHeaderOUT->Checksum = 0;\r
- ICMPHeaderOUT->Id = ICMPHeaderIN->Id;\r
- ICMPHeaderOUT->Sequence = ICMPHeaderIN->Sequence;\r
- \r
- uint16_t DataSize = FrameIN.FrameLength - ((((uint16_t)InDataStart + sizeof(ICMP_Header_t)) - (uint16_t)FrameIN.FrameData));\r
- \r
- /* Copy the remaining payload to the response - echo requests should echo back any sent data */\r
- memcpy(&((uint8_t*)OutDataStart)[sizeof(ICMP_Header_t)],\r
- &((uint8_t*)InDataStart)[sizeof(ICMP_Header_t)],\r
- DataSize);\r
-\r
- ICMPHeaderOUT->Checksum = Ethernet_Checksum16(ICMPHeaderOUT, (DataSize + sizeof(ICMP_Header_t)));\r
-\r
- /* Return the size of the response so far */\r
- return (DataSize + sizeof(ICMP_Header_t));\r
- }\r
- \r
- return NO_RESPONSE;\r
-}\r
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2010.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2010 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
+ *
+ * Internet Control Message Protocol (ICMP) packet handling routines. This protocol handles
+ * Echo requests from the host, to indicate a successful network connection between the host
+ * and the virtual server.
+ */
+
+#include "ICMP.h"
+
+/** Processes an ICMP packet inside an Ethernet frame, and writes the appropriate response
+ * to the output Ethernet frame if the host is issuing a ICMP ECHO request.
+ *
+ * \param[in] InDataStart Pointer to the start of the incoming packet's ICMP header
+ * \param[out] OutDataStart Pointer to the start of the outgoing packet's ICMP header
+ *
+ * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE otherwise
+ */
+int16_t ICMP_ProcessICMPPacket(void* InDataStart, void* OutDataStart)
+{
+ ICMP_Header_t* ICMPHeaderIN = (ICMP_Header_t*)InDataStart;
+ ICMP_Header_t* ICMPHeaderOUT = (ICMP_Header_t*)OutDataStart;
+
+ DecodeICMPHeader(InDataStart);
+
+ /* Determine if the ICMP packet is an echo request (ping) */
+ if (ICMPHeaderIN->Type == ICMP_TYPE_ECHOREQUEST)
+ {
+ /* Fill out the ICMP response packet */
+ ICMPHeaderOUT->Type = ICMP_TYPE_ECHOREPLY;
+ ICMPHeaderOUT->Code = 0;
+ ICMPHeaderOUT->Checksum = 0;
+ ICMPHeaderOUT->Id = ICMPHeaderIN->Id;
+ ICMPHeaderOUT->Sequence = ICMPHeaderIN->Sequence;
+
+ uint16_t DataSize = FrameIN.FrameLength - ((((uint16_t)InDataStart + sizeof(ICMP_Header_t)) - (uint16_t)FrameIN.FrameData));
+
+ /* Copy the remaining payload to the response - echo requests should echo back any sent data */
+ memcpy(&((uint8_t*)OutDataStart)[sizeof(ICMP_Header_t)],
+ &((uint8_t*)InDataStart)[sizeof(ICMP_Header_t)],
+ DataSize);
+
+ ICMPHeaderOUT->Checksum = Ethernet_Checksum16(ICMPHeaderOUT, (DataSize + sizeof(ICMP_Header_t)));
+
+ /* Return the size of the response so far */
+ return (DataSize + sizeof(ICMP_Header_t));
+ }
+
+ return NO_RESPONSE;
+}
projects / pub / USBasp.git / blobdiff