genericopenlibs/cstdlib/LINCINET/IP.H
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 02:01:42 +0200
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/* IP.H
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 * 
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 * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).
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 * All rights reserved.
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 */
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/** @file
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@publishedAll
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@released
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*/
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/*
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 * Copyright (c) 1982, 1986 Regents of the University of California.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms are permitted
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 * provided that this notice is preserved and that due credit is given
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 * to the University of California at Berkeley. The name of the University
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 * may not be used to endorse or promote products derived from this
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 * software without specific prior written permission. This software
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 * is provided ``as is'' without express or implied warranty.
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 */
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/*
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 * Definitions for internet protocol version 4.
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 * Per RFC 791, September 1981.
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 */
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#ifndef	_NETINET_IP_H
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#define	_NETINET_IP_H
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#ifdef	__cplusplus
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extern "C" {
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#endif
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#define	IPVERSION	4
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/**
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Structure of an internet header, naked of options.
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We declare ip_len and ip_off to be short, rather than u_short
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pragmatically since otherwise unsigned comparisons can result
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against negative integers quite easily, and fail in subtle ways.
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*/
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struct ip {
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#ifdef _BIT_FIELDS_LTOH
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	u_char	ip_hl:4,		/* header length */
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		ip_v:4;			/* version */
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#else
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	u_char	ip_v:4,			/* version */
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		ip_hl:4;		/* header length */
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#endif
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	u_char	ip_tos;			/* type of service */
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	short	ip_len;			/* total length */
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	u_short	ip_id;			/* identification */
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	short	ip_off;			/* fragment offset field */
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#define	IP_DF 0x4000			/* dont fragment flag */
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#define	IP_MF 0x2000			/* more fragments flag */
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	u_char	ip_ttl;			/* time to live */
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	u_char	ip_p;			/* protocol */
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	u_short	ip_sum;			/* checksum */
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	struct	in_addr ip_src, ip_dst;	/* source and dest address */
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};
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#define	IP_MAXPACKET	65535		/* maximum packet size */
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/**
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Definitions for IP type of service (ip_tos)
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*/
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#define	IPTOS_LOWDELAY		0x10
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#define	IPTOS_THROUGHPUT	0x08
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#define	IPTOS_RELIABILITY	0x04
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/**
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Definitions for IP precedence (also in ip_tos) (hopefully unused)
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*/
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#define	IPTOS_PREC_NETCONTROL		0xe0
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#define	IPTOS_PREC_INTERNETCONTROL	0xc0
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#define	IPTOS_PREC_CRITIC_ECP		0xa0
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#define	IPTOS_PREC_FLASHOVERRIDE	0x80
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#define	IPTOS_PREC_FLASH		0x60
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#define	IPTOS_PREC_IMMEDIATE		0x40
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#define	IPTOS_PREC_PRIORITY		0x20
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#define	IPTOS_PREC_ROUTINE		0x00
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/**
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Definitions for options.
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*/
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#define	IPOPT_COPIED(o)		((o)&0x80)
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#define	IPOPT_CLASS(o)		((o)&0x60)
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#define	IPOPT_NUMBER(o)		((o)&0x1f)
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#define	IPOPT_CONTROL		0x00
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#define	IPOPT_RESERVED1		0x20
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#define	IPOPT_DEBMEAS		0x40
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#define	IPOPT_RESERVED2		0x60
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#define	IPOPT_EOL		0		/* end of option list */
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#define	IPOPT_NOP		1		/* no operation */
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#define	IPOPT_RR		7		/* record packet route */
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#define	IPOPT_TS		68		/* timestamp */
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#define	IPOPT_SECURITY		130		/* provide s,c,h,tcc */
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#define	IPOPT_LSRR		131		/* loose source route */
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#define	IPOPT_SATID		136		/* satnet id */
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#define	IPOPT_SSRR		137		/* strict source route */
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/**
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Offsets to fields in options other than EOL and NOP.
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*/
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#define	IPOPT_OPTVAL		0		/* option ID */
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#define	IPOPT_OLEN		1		/* option length */
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#define	IPOPT_OFFSET		2		/* offset within option */
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#define	IPOPT_MINOFF		4		/* min value of above */
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/**
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Time stamp option structure.
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*/
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struct	ip_timestamp {
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	u_char	ipt_code;		/* IPOPT_TS */
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	u_char	ipt_len;		/* size of structure (variable) */
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	u_char	ipt_ptr;		/* index of current entry */
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#ifdef _BIT_FIELDS_LTOH
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	u_char	ipt_flg:4,		/* flags, see below */
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		ipt_oflw:4;		/* overflow counter */
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#else
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	u_char	ipt_oflw:4,		/* overflow counter */
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		ipt_flg:4;		/* flags, see below */
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#endif
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	union ipt_timestamp {
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		n_long	ipt_time[1];
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		struct	ipt_ta {
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			struct in_addr ipt_addr;
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			n_long ipt_time;
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		} ipt_ta[1];
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	} ipt_timestamp;
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};
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/**
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flag bits for ipt_flg 
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*/
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#define	IPOPT_TS_TSONLY		0		/* timestamps only */
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#define	IPOPT_TS_TSANDADDR	1		/* timestamps and addresses */
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#define	IPOPT_TS_PRESPEC	2		/* specified modules only */
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/** 
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bits for security (not byte swapped) 
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*/
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#define	IPOPT_SECUR_UNCLASS	0x0000
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#define	IPOPT_SECUR_CONFID	0xf135
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#define	IPOPT_SECUR_EFTO	0x789a
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#define	IPOPT_SECUR_MMMM	0xbc4d
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#define	IPOPT_SECUR_RESTR	0xaf13
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#define	IPOPT_SECUR_SECRET	0xd788
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#define	IPOPT_SECUR_TOPSECRET	0x6bc5
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/**
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Internet implementation parameters.
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*/
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#define	MAXTTL		255		/* maximum time to live (seconds) */
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#define	IPFRAGTTL	60		/* time to live for frags, slowhz */
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#define	IPTTLDEC	1		/* subtracted when forwarding */
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#define	IP_MSS		576		/* default maximum segment size */
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#ifdef	__cplusplus
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}
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#endif
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#endif	/* _NETINET_IP_H */