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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
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