-/*\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 Protocol (IP) packet handling routines. This protocol handles IP packets from the\r
- * host which typically encapsulate other protocols such as ICMP, UDP and TCP.\r
- */\r
- \r
-#include "IP.h"\r
-\r
-/** Processes an IP packet inside an Ethernet frame, and writes the appropriate response\r
- * to the output Ethernet frame if one is created by a sub-protocol handler.\r
- *\r
- * \param[in] InDataStart Pointer to the start of the incoming packet's IP header\r
- * \param[out] OutDataStart Pointer to the start of the outgoing packet's IP header\r
- *\r
- * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE if no\r
- * response was generated, NO_PROCESS if the packet processing was deferred until the\r
- * next Ethernet packet handler iteration\r
- */\r
-int16_t IP_ProcessIPPacket(void* InDataStart, void* OutDataStart)\r
-{\r
- DecodeIPHeader(InDataStart);\r
-\r
- IP_Header_t* IPHeaderIN = (IP_Header_t*)InDataStart;\r
- IP_Header_t* IPHeaderOUT = (IP_Header_t*)OutDataStart;\r
-\r
- /* Header length is specified in number of longs in the packet header, convert to bytes */\r
- uint16_t HeaderLengthBytes = (IPHeaderIN->HeaderLength * sizeof(uint32_t));\r
-\r
- int16_t RetSize = NO_RESPONSE;\r
-\r
- /* Check to ensure the IP packet is addressed to the virtual webserver's IP or the broadcast IP address */\r
- if (!(IP_COMPARE(&IPHeaderIN->DestinationAddress, &ServerIPAddress)) &&\r
- !(IP_COMPARE(&IPHeaderIN->DestinationAddress, &BroadcastIPAddress)))\r
- {\r
- return NO_RESPONSE;\r
- }\r
- \r
- /* Pass off the IP payload to the appropriate protocol processing routine */\r
- switch (IPHeaderIN->Protocol)\r
- {\r
- case PROTOCOL_ICMP:\r
- RetSize = ICMP_ProcessICMPPacket(&((uint8_t*)InDataStart)[HeaderLengthBytes],\r
- &((uint8_t*)OutDataStart)[sizeof(IP_Header_t)]);\r
- break;\r
- case PROTOCOL_TCP:\r
- RetSize = TCP_ProcessTCPPacket(InDataStart,\r
- &((uint8_t*)InDataStart)[HeaderLengthBytes],\r
- &((uint8_t*)OutDataStart)[sizeof(IP_Header_t)]); \r
- break;\r
- case PROTOCOL_UDP:\r
- RetSize = UDP_ProcessUDPPacket(InDataStart,\r
- &((uint8_t*)InDataStart)[HeaderLengthBytes],\r
- &((uint8_t*)OutDataStart)[sizeof(IP_Header_t)]); \r
- break;\r
- }\r
- \r
- /* Check to see if the protocol processing routine has filled out a response */\r
- if (RetSize > 0)\r
- {\r
- /* Fill out the response IP packet header */\r
- IPHeaderOUT->TotalLength = SwapEndian_16(sizeof(IP_Header_t) + RetSize);\r
- IPHeaderOUT->TypeOfService = 0;\r
- IPHeaderOUT->HeaderLength = (sizeof(IP_Header_t) / sizeof(uint32_t));\r
- IPHeaderOUT->Version = 4;\r
- IPHeaderOUT->Flags = 0;\r
- IPHeaderOUT->FragmentOffset = 0;\r
- IPHeaderOUT->Identification = 0;\r
- IPHeaderOUT->HeaderChecksum = 0;\r
- IPHeaderOUT->Protocol = IPHeaderIN->Protocol;\r
- IPHeaderOUT->TTL = DEFAULT_TTL;\r
- IPHeaderOUT->SourceAddress = IPHeaderIN->DestinationAddress;\r
- IPHeaderOUT->DestinationAddress = IPHeaderIN->SourceAddress;\r
- \r
- IPHeaderOUT->HeaderChecksum = Ethernet_Checksum16(IPHeaderOUT, sizeof(IP_Header_t));\r
- \r
- /* Return the size of the response so far */\r
- return (sizeof(IP_Header_t) + RetSize);\r
- }\r
- \r
- return RetSize;\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 Protocol (IP) packet handling routines. This protocol handles IP packets from the
+ * host which typically encapsulate other protocols such as ICMP, UDP and TCP.
+ */
+
+#include "IP.h"
+
+/** Processes an IP packet inside an Ethernet frame, and writes the appropriate response
+ * to the output Ethernet frame if one is created by a sub-protocol handler.
+ *
+ * \param[in] InDataStart Pointer to the start of the incoming packet's IP header
+ * \param[out] OutDataStart Pointer to the start of the outgoing packet's IP header
+ *
+ * \return The number of bytes written to the out Ethernet frame if any, NO_RESPONSE if no
+ * response was generated, NO_PROCESS if the packet processing was deferred until the
+ * next Ethernet packet handler iteration
+ */
+int16_t IP_ProcessIPPacket(void* InDataStart, void* OutDataStart)
+{
+ DecodeIPHeader(InDataStart);
+
+ IP_Header_t* IPHeaderIN = (IP_Header_t*)InDataStart;
+ IP_Header_t* IPHeaderOUT = (IP_Header_t*)OutDataStart;
+
+ /* Header length is specified in number of longs in the packet header, convert to bytes */
+ uint16_t HeaderLengthBytes = (IPHeaderIN->HeaderLength * sizeof(uint32_t));
+
+ int16_t RetSize = NO_RESPONSE;
+
+ /* Check to ensure the IP packet is addressed to the virtual webserver's IP or the broadcast IP address */
+ if (!(IP_COMPARE(&IPHeaderIN->DestinationAddress, &ServerIPAddress)) &&
+ !(IP_COMPARE(&IPHeaderIN->DestinationAddress, &BroadcastIPAddress)))
+ {
+ return NO_RESPONSE;
+ }
+
+ /* Pass off the IP payload to the appropriate protocol processing routine */
+ switch (IPHeaderIN->Protocol)
+ {
+ case PROTOCOL_ICMP:
+ RetSize = ICMP_ProcessICMPPacket(&((uint8_t*)InDataStart)[HeaderLengthBytes],
+ &((uint8_t*)OutDataStart)[sizeof(IP_Header_t)]);
+ break;
+ case PROTOCOL_TCP:
+ RetSize = TCP_ProcessTCPPacket(InDataStart,
+ &((uint8_t*)InDataStart)[HeaderLengthBytes],
+ &((uint8_t*)OutDataStart)[sizeof(IP_Header_t)]);
+ break;
+ case PROTOCOL_UDP:
+ RetSize = UDP_ProcessUDPPacket(InDataStart,
+ &((uint8_t*)InDataStart)[HeaderLengthBytes],
+ &((uint8_t*)OutDataStart)[sizeof(IP_Header_t)]);
+ break;
+ }
+
+ /* Check to see if the protocol processing routine has filled out a response */
+ if (RetSize > 0)
+ {
+ /* Fill out the response IP packet header */
+ IPHeaderOUT->TotalLength = SwapEndian_16(sizeof(IP_Header_t) + RetSize);
+ IPHeaderOUT->TypeOfService = 0;
+ IPHeaderOUT->HeaderLength = (sizeof(IP_Header_t) / sizeof(uint32_t));
+ IPHeaderOUT->Version = 4;
+ IPHeaderOUT->Flags = 0;
+ IPHeaderOUT->FragmentOffset = 0;
+ IPHeaderOUT->Identification = 0;
+ IPHeaderOUT->HeaderChecksum = 0;
+ IPHeaderOUT->Protocol = IPHeaderIN->Protocol;
+ IPHeaderOUT->TTL = DEFAULT_TTL;
+ IPHeaderOUT->SourceAddress = IPHeaderIN->DestinationAddress;
+ IPHeaderOUT->DestinationAddress = IPHeaderIN->SourceAddress;
+
+ IPHeaderOUT->HeaderChecksum = Ethernet_Checksum16(IPHeaderOUT, sizeof(IP_Header_t));
+
+ /* Return the size of the response so far */
+ return (sizeof(IP_Header_t) + RetSize);
+ }
+
+ return RetSize;
+}
projects / pub / USBasp.git / blobdiff