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