94 lines
3.4 KiB
C
94 lines
3.4 KiB
C
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2019.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2019 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaims all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Header file for IP.c.
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*/
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#ifndef _IP_H_
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#define _IP_H_
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/* Includes: */
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#include <avr/io.h>
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#include <string.h>
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#include "EthernetProtocols.h"
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#include "Ethernet.h"
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#include "ProtocolDecoders.h"
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#include "Config/AppConfig.h"
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/* Macros: */
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/** Protocol IP address of the broadcast address. */
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#define BROADCAST_IP_ADDRESS {0xFF, 0xFF, 0xFF, 0xFF}
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/** Default Time To Live (TTL) value for sent packets, indicating the maximum allowable hops until their destination
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* is reached.
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*/
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#define DEFAULT_TTL 128
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/** Performs a comparison between two IP addresses, indicating if they are identical.
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*
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* \param[in] IP1 First IP address
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* \param[in] IP2 Second IP address
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*
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* \return True if the addresses match, \c false otherwise
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*/
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#define IP_COMPARE(IP1, IP2) (memcmp(IP1, IP2, sizeof(IP_Address_t)) == 0)
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/* Type Defines: */
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/** Type define of an IP packet header. */
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typedef struct
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{
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unsigned HeaderLength : 4; /**< Total length of the packet header, in 4-byte blocks */
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unsigned Version : 4; /**< IP protocol version */
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uint8_t TypeOfService; /**< Special service type identifier, indicating delay/throughput/reliability levels */
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uint16_t TotalLength; /**< Total length of the IP packet, in bytes */
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uint16_t Identification; /**< Identification value for identifying fragmented packets */
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unsigned FragmentOffset : 13; /**< Offset of this IP fragment */
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unsigned Flags : 3; /**< Fragment flags, to indicate if a packet is fragmented */
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uint8_t TTL; /**< Maximum allowable number of hops to reach the packet destination */
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uint8_t Protocol; /**< Encapsulated protocol type */
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uint16_t HeaderChecksum; /**< Ethernet checksum of the IP header */
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IP_Address_t SourceAddress; /**< Source protocol IP address of the packet */
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IP_Address_t DestinationAddress; /**< Destination protocol IP address of the packet */
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} IP_Header_t;
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/* Function Prototypes: */
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int16_t IP_ProcessIPPacket(Ethernet_Frame_Info_t* const FrameIN,
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void* InDataStart,
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void* OutDataStart);
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#endif
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