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+/*
+ 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
+ *
+ * Header file for IP.c.
+ */
+
+#ifndef _IP_H_
+#define _IP_H_
+
+ /* Includes: */
+ #include <avr/io.h>
+ #include <string.h>
+
+ #include "EthernetProtocols.h"
+ #include "Ethernet.h"
+ #include "ProtocolDecoders.h"
+
+ /* Macros: */
+ /** Protocol IP address of the host (client) machine, once assigned by DHCP */
+ #define CLIENT_IP_ADDRESS { 10, 0, 0, 1}
+
+ /** Protocol IP address of the virtual server machine */
+ #define SERVER_IP_ADDRESS { 10, 0, 0, 2}
+
+ /** Protocol IP address of the broadcase address */
+ #define BROADCAST_IP_ADDRESS {0xFF, 0xFF, 0xFF, 0xFF}
+
+ /** Default Time To Live (TTL) value for sent packets, indicating the maximum allowable hops until their destination is reached */
+ #define DEFAULT_TTL 128
+
+ /** Performs a comparison between two IP addresses, indicating if they are identical.
+ *
+ * \param IP1 First IP address
+ * \param IP2 Second IP address
+ *
+ * \return True if the addresses match, false otherwise
+ */
+ #define IP_COMPARE(IP1, IP2) (memcmp(IP1, IP2, sizeof(IP_Address_t)) == 0)
+
+ /* Type Defines: */
+ /** Type define of an IP packet header. */
+ typedef struct
+ {
+ unsigned int HeaderLength : 4; /**< Total length of the packet header, in 4-byte blocks */
+ unsigned int Version : 4; /**< IP protocol version */
+ unsigned int TypeOfService : 8; /**< Special service type identifier, indicating delay/throughput/reliability levels */
+ unsigned int TotalLength : 16; /**< Total length of the IP packet, in bytes */
+
+ unsigned int Identification : 16; /**< Idenfication value for identifying fragmented packets */
+ unsigned int FragmentOffset : 13; /**< Offset of this IP fragment */
+ unsigned int Flags : 3; /**< Fragment flags, to indicate if a packet is fragmented */
+
+ unsigned int TTL : 8; /**< Maximum allowable number of hops to reach the packet destination */
+ unsigned int Protocol : 8; /**< Encapsulated protocol type */
+ unsigned int HeaderChecksum : 16; /**< Ethernet checksum of the IP header */
+
+ IP_Address_t SourceAddress; /**< Source protocol IP address of the packet */
+ IP_Address_t DestinationAddress; /**< Destination protocol IP address of the packet */
+ } IP_Header_t;
+
+ /* Function Prototypes: */
+ int16_t IP_ProcessIPPacket(void* InDataStart, void* OutDataStart);
+
+#endif