[unix-history] / sys / netinet / ip.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)ip.h	7.10 (Berkeley) 6/28/90
 *	$Id: ip.h,v 1.2 1993/10/16 18:26:08 rgrimes Exp $
 */

#ifndef _NETINET_IP_H_
#define _NETINET_IP_H_ 1

/*
 * Definitions for internet protocol version 4.
 * Per RFC 791, September 1981.
 */
#define	IPVERSION	4

/*
 * Structure of an internet header, naked of options.
 *
 * We declare ip_len and ip_off to be short, rather than u_short
 * pragmatically since otherwise unsigned comparisons can result
 * against negative integers quite easily, and fail in subtle ways.
 */
struct ip {
#if BYTE_ORDER == LITTLE_ENDIAN 
	u_char	ip_hl:4,		/* header length */
		ip_v:4;			/* version */
#endif
#if BYTE_ORDER == BIG_ENDIAN 
	u_char	ip_v:4,			/* version */
		ip_hl:4;		/* header length */
#endif
	u_char	ip_tos;			/* type of service */
	short	ip_len;			/* total length */
	u_short	ip_id;			/* identification */
	short	ip_off;			/* fragment offset field */
#define	IP_DF 0x4000			/* dont fragment flag */
#define	IP_MF 0x2000			/* more fragments flag */
	u_char	ip_ttl;			/* time to live */
	u_char	ip_p;			/* protocol */
	u_short	ip_sum;			/* checksum */
	struct	in_addr ip_src,ip_dst;	/* source and dest address */
};

#define	IP_MAXPACKET	65535		/* maximum packet size */

/*
 * Definitions for IP type of service (ip_tos)
 */
#define	IPTOS_LOWDELAY		0x10
#define	IPTOS_THROUGHPUT	0x08
#define	IPTOS_RELIABILITY	0x04

/*
 * Definitions for IP precedence (also in ip_tos) (hopefully unused)
 */
#define	IPTOS_PREC_NETCONTROL		0xe0
#define	IPTOS_PREC_INTERNETCONTROL	0xc0
#define	IPTOS_PREC_CRITIC_ECP		0xa0
#define	IPTOS_PREC_FLASHOVERRIDE	0x80
#define	IPTOS_PREC_FLASH		0x60
#define	IPTOS_PREC_IMMEDIATE		0x40
#define	IPTOS_PREC_PRIORITY		0x20
#define	IPTOS_PREC_ROUTINE		0x10

/*
 * Definitions for options.
 */
#define	IPOPT_COPIED(o)		((o)&0x80)
#define	IPOPT_CLASS(o)		((o)&0x60)
#define	IPOPT_NUMBER(o)		((o)&0x1f)

#define	IPOPT_CONTROL		0x00
#define	IPOPT_RESERVED1		0x20
#define	IPOPT_DEBMEAS		0x40
#define	IPOPT_RESERVED2		0x60

#define	IPOPT_EOL		0		/* end of option list */
#define	IPOPT_NOP		1		/* no operation */

#define	IPOPT_RR		7		/* record packet route */
#define	IPOPT_TS		68		/* timestamp */
#define	IPOPT_SECURITY		130		/* provide s,c,h,tcc */
#define	IPOPT_LSRR		131		/* loose source route */
#define	IPOPT_SATID		136		/* satnet id */
#define	IPOPT_SSRR		137		/* strict source route */

/*
 * Offsets to fields in options other than EOL and NOP.
 */
#define	IPOPT_OPTVAL		0		/* option ID */
#define	IPOPT_OLEN		1		/* option length */
#define IPOPT_OFFSET		2		/* offset within option */
#define	IPOPT_MINOFF		4		/* min value of above */

/*
 * Time stamp option structure.
 */
struct	ip_timestamp {
	u_char	ipt_code;		/* IPOPT_TS */
	u_char	ipt_len;		/* size of structure (variable) */
	u_char	ipt_ptr;		/* index of current entry */
#if BYTE_ORDER == LITTLE_ENDIAN 
	u_char	ipt_flg:4,		/* flags, see below */
		ipt_oflw:4;		/* overflow counter */
#endif
#if BYTE_ORDER == BIG_ENDIAN 
	u_char	ipt_oflw:4,		/* overflow counter */
		ipt_flg:4;		/* flags, see below */
#endif
	union ipt_timestamp {
		n_long	ipt_time[1];
		struct	ipt_ta {
			struct in_addr ipt_addr;
			n_long ipt_time;
		} ipt_ta[1];
	} ipt_timestamp;
};

/* flag bits for ipt_flg */
#define	IPOPT_TS_TSONLY		0		/* timestamps only */
#define	IPOPT_TS_TSANDADDR	1		/* timestamps and addresses */
#define	IPOPT_TS_PRESPEC	3		/* specified modules only */

/* bits for security (not byte swapped) */
#define	IPOPT_SECUR_UNCLASS	0x0000
#define	IPOPT_SECUR_CONFID	0xf135
#define	IPOPT_SECUR_EFTO	0x789a
#define	IPOPT_SECUR_MMMM	0xbc4d
#define	IPOPT_SECUR_RESTR	0xaf13
#define	IPOPT_SECUR_SECRET	0xd788
#define	IPOPT_SECUR_TOPSECRET	0x6bc5

/*
 * Internet implementation parameters.
 */
#define	MAXTTL		255		/* maximum time to live (seconds) */
#define	IPFRAGTTL	60		/* time to live for frags, slowhz */
#define	IPTTLDEC	1		/* subtracted when forwarding */

#define	IP_MSS		576		/* default maximum segment size */
#endif /* _NETINET_IP_H_ */
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1982, 1986 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
38e82238	33	* from: @(#)ip.h 7.10 (Berkeley) 6/28/90
8ace4366	34	* $Id: ip.h,v 1.2 1993/10/16 18:26:08 rgrimes Exp $
15637ed4 RG	35	*/
15637ed4 RG	36
8ace4366 GW	37	#ifndef _NETINET_IP_H_
	38	#define _NETINET_IP_H_ 1
	39
15637ed4 RG	40	/*
	41	* Definitions for internet protocol version 4.
	42	* Per RFC 791, September 1981.
	43	*/
	44	#define IPVERSION 4
	45
	46	/*
	47	* Structure of an internet header, naked of options.
	48	*
	49	* We declare ip_len and ip_off to be short, rather than u_short
	50	* pragmatically since otherwise unsigned comparisons can result
	51	* against negative integers quite easily, and fail in subtle ways.
	52	*/
	53	struct ip {
	54	#if BYTE_ORDER == LITTLE_ENDIAN
	55	u_char ip_hl:4, /* header length */
	56	ip_v:4; /* version */
	57	#endif
	58	#if BYTE_ORDER == BIG_ENDIAN
	59	u_char ip_v:4, /* version */
	60	ip_hl:4; /* header length */
	61	#endif
	62	u_char ip_tos; /* type of service */
	63	short ip_len; /* total length */
	64	u_short ip_id; /* identification */
	65	short ip_off; /* fragment offset field */
	66	#define IP_DF 0x4000 /* dont fragment flag */
	67	#define IP_MF 0x2000 /* more fragments flag */
	68	u_char ip_ttl; /* time to live */
	69	u_char ip_p; /* protocol */
	70	u_short ip_sum; /* checksum */
	71	struct in_addr ip_src,ip_dst; /* source and dest address */
	72	};
	73
	74	#define IP_MAXPACKET 65535 /* maximum packet size */
	75
	76	/*
	77	* Definitions for IP type of service (ip_tos)
	78	*/
	79	#define IPTOS_LOWDELAY 0x10
	80	#define IPTOS_THROUGHPUT 0x08
	81	#define IPTOS_RELIABILITY 0x04
	82
	83	/*
	84	* Definitions for IP precedence (also in ip_tos) (hopefully unused)
	85	*/
	86	#define IPTOS_PREC_NETCONTROL 0xe0
	87	#define IPTOS_PREC_INTERNETCONTROL 0xc0
	88	#define IPTOS_PREC_CRITIC_ECP 0xa0
	89	#define IPTOS_PREC_FLASHOVERRIDE 0x80
	90	#define IPTOS_PREC_FLASH 0x60
	91	#define IPTOS_PREC_IMMEDIATE 0x40
	92	#define IPTOS_PREC_PRIORITY 0x20
	93	#define IPTOS_PREC_ROUTINE 0x10
	94
	95	/*
	96	* Definitions for options.
	97	*/
	98	#define IPOPT_COPIED(o) ((o)&0x80)
	99	#define IPOPT_CLASS(o) ((o)&0x60)
	100	#define IPOPT_NUMBER(o) ((o)&0x1f)
	101
	102	#define IPOPT_CONTROL 0x00
	103	#define IPOPT_RESERVED1 0x20
104	#define IPOPT_DEBMEAS 0x40
105	#define IPOPT_RESERVED2 0x60
106
107	#define IPOPT_EOL 0 /* end of option list */
108	#define IPOPT_NOP 1 /* no operation */
109
110	#define IPOPT_RR 7 /* record packet route */
111	#define IPOPT_TS 68 /* timestamp */
112	#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
113	#define IPOPT_LSRR 131 /* loose source route */
114	#define IPOPT_SATID 136 /* satnet id */
115	#define IPOPT_SSRR 137 /* strict source route */
116
117	/*
118	* Offsets to fields in options other than EOL and NOP.
119	*/
120	#define IPOPT_OPTVAL 0 /* option ID */
121	#define IPOPT_OLEN 1 /* option length */
122	#define IPOPT_OFFSET 2 /* offset within option */
123	#define IPOPT_MINOFF 4 /* min value of above */
124
125	/*
126	* Time stamp option structure.
127	*/
128	struct ip_timestamp {
129	u_char ipt_code; /* IPOPT_TS */
130	u_char ipt_len; /* size of structure (variable) */
131	u_char ipt_ptr; /* index of current entry */
132	#if BYTE_ORDER == LITTLE_ENDIAN
133	u_char ipt_flg:4, /* flags, see below */
134	ipt_oflw:4; /* overflow counter */
135	#endif
136	#if BYTE_ORDER == BIG_ENDIAN
137	u_char ipt_oflw:4, /* overflow counter */
138	ipt_flg:4; /* flags, see below */
139	#endif
140	union ipt_timestamp {
141	n_long ipt_time[1];
142	struct ipt_ta {
143	struct in_addr ipt_addr;
144	n_long ipt_time;
145	} ipt_ta[1];
146	} ipt_timestamp;
147	};
148
149	/* flag bits for ipt_flg */
150	#define IPOPT_TS_TSONLY 0 /* timestamps only */
151	#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
152	#define IPOPT_TS_PRESPEC 3 /* specified modules only */
153
154	/* bits for security (not byte swapped) */
155	#define IPOPT_SECUR_UNCLASS 0x0000
156	#define IPOPT_SECUR_CONFID 0xf135
157	#define IPOPT_SECUR_EFTO 0x789a
158	#define IPOPT_SECUR_MMMM 0xbc4d
159	#define IPOPT_SECUR_RESTR 0xaf13
160	#define IPOPT_SECUR_SECRET 0xd788
161	#define IPOPT_SECUR_TOPSECRET 0x6bc5
162
163	/*
164	* Internet implementation parameters.
165	*/
166	#define MAXTTL 255 /* maximum time to live (seconds) */
167	#define IPFRAGTTL 60 /* time to live for frags, slowhz */
168	#define IPTTLDEC 1 /* subtracted when forwarding */
169
170	#define IP_MSS 576 /* default maximum segment size */
8ace4366	171	#endif /* _NETINET_IP_H_ */