[apple/xnu.git] / bsd / netinet / ip.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1982, 1986, 1993
 *	The 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.
 *
 *	@(#)ip.h	8.2 (Berkeley) 6/1/94
 * $FreeBSD: src/sys/netinet/ip.h,v 1.17 1999/12/22 19:13:20 shin Exp $
 */

#ifndef _NETINET_IP_H_
#define _NETINET_IP_H_
#include <sys/appleapiopts.h>
#include <sys/types.h>		/* XXX temporary hack to get u_ types */
#include <netinet/in.h>
#include <netinet/in_systm.h>


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

/*
 * Structure of an internet header, naked of options.
 */
struct ip {
#ifdef _IP_VHL
	u_char	ip_vhl;			/* version << 4 | header length >> 2 */
#else
#if BYTE_ORDER == LITTLE_ENDIAN
	u_int	ip_hl:4,		/* header length */
		ip_v:4;			/* version */
#endif
#if BYTE_ORDER == BIG_ENDIAN
	u_int	ip_v:4,			/* version */
		ip_hl:4;		/* header length */
#endif
#endif /* not _IP_VHL */
	u_char	ip_tos;			/* type of service */
	u_short	ip_len;			/* total length */
	u_short	ip_id;			/* identification */
	u_short	ip_off;			/* fragment offset field */
#define	IP_RF 0x8000			/* reserved fragment flag */
#define	IP_DF 0x4000			/* dont fragment flag */
#define	IP_MF 0x2000			/* more fragments flag */
#define	IP_OFFMASK 0x1fff		/* mask for fragmenting bits */
	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 */
};

#ifdef _IP_VHL
#define	IP_MAKE_VHL(v, hl)	((v) << 4 | (hl))
#define	IP_VHL_HL(vhl)		((vhl) & 0x0f)
#define	IP_VHL_V(vhl)		((vhl) >> 4)
#define	IP_VHL_BORING		0x45
#endif

#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
#define	IPTOS_MINCOST		0x02
#if 1
/* ECN RFC3168 obsoletes RFC2481, and these will be deprecated soon. */
#define	IPTOS_CE		0x01
#define	IPTOS_ECT		0x02
#endif

/*
 * ECN (Explicit Congestion Notification) codepoints in RFC3168
 * mapped to the lower 2 bits of the TOS field.
 */
#define	IPTOS_ECN_NOTECT	0x00	/* not-ECT */
#define	IPTOS_ECN_ECT1		0x01	/* ECN-capable transport (1) */
#define	IPTOS_ECN_ECT0		0x02	/* ECN-capable transport (0) */
#define	IPTOS_ECN_CE		0x03	/* congestion experienced */
#define	IPTOS_ECN_MASK		0x03	/* ECN field mask */

/*
 * 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		0x00

/*
 * 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 */
#define	IPOPT_RA		148		/* router alert */

/*
 * 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_int	ipt_flg:4,		/* flags, see below */
		ipt_oflw:4;		/* overflow counter */
#endif
#if BYTE_ORDER == BIG_ENDIAN
	u_int	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	IPDEFTTL	64		/* default ttl, from RFC 1340 */
#define	IPFRAGTTL	60		/* time to live for frags, slowhz */
#define	IPTTLDEC	1		/* subtracted when forwarding */

#define	IP_MSS		576		/* default maximum segment size */

#endif
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* Copyright (c) 1982, 1986, 1993
	30	* The Regents of the University of California. All rights reserved.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	* @(#)ip.h 8.2 (Berkeley) 6/1/94
9bccf70c	61	* $FreeBSD: src/sys/netinet/ip.h,v 1.17 1999/12/22 19:13:20 shin Exp $
1c79356b A	62	*/
	63
	64	#ifndef _NETINET_IP_H_
	65	#define _NETINET_IP_H_
9bccf70c	66	#include <sys/appleapiopts.h>
0c530ab8	67	#include <sys/types.h> /* XXX temporary hack to get u_ types */
91447636 A	68	#include <netinet/in.h>
	69	#include <netinet/in_systm.h>
	70
1c79356b A	71
	72	/*
	73	* Definitions for internet protocol version 4.
	74	* Per RFC 791, September 1981.
	75	*/
	76	#define IPVERSION 4
	77
	78	/*
	79	* Structure of an internet header, naked of options.
	80	*/
	81	struct ip {
	82	#ifdef _IP_VHL
	83	u_char ip_vhl; /* version << 4 \| header length >> 2 */
	84	#else
	85	#if BYTE_ORDER == LITTLE_ENDIAN
	86	u_int ip_hl:4, /* header length */
	87	ip_v:4; /* version */
	88	#endif
	89	#if BYTE_ORDER == BIG_ENDIAN
	90	u_int ip_v:4, /* version */
	91	ip_hl:4; /* header length */
	92	#endif
	93	#endif /* not _IP_VHL */
	94	u_char ip_tos; /* type of service */
	95	u_short ip_len; /* total length */
	96	u_short ip_id; /* identification */
	97	u_short ip_off; /* fragment offset field */
	98	#define IP_RF 0x8000 /* reserved fragment flag */
	99	#define IP_DF 0x4000 /* dont fragment flag */
	100	#define IP_MF 0x2000 /* more fragments flag */
	101	#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
	102	u_char ip_ttl; /* time to live */
	103	u_char ip_p; /* protocol */
	104	u_short ip_sum; /* checksum */
	105	struct in_addr ip_src,ip_dst; /* source and dest address */
	106	};
	107
	108	#ifdef _IP_VHL
	109	#define IP_MAKE_VHL(v, hl) ((v) << 4 \| (hl))
	110	#define IP_VHL_HL(vhl) ((vhl) & 0x0f)
	111	#define IP_VHL_V(vhl) ((vhl) >> 4)
	112	#define IP_VHL_BORING 0x45
	113	#endif
	114
	115	#define IP_MAXPACKET 65535 /* maximum packet size */
	116
	117	/*
	118	* Definitions for IP type of service (ip_tos)
	119	*/
	120	#define IPTOS_LOWDELAY 0x10
	121	#define IPTOS_THROUGHPUT 0x08
	122	#define IPTOS_RELIABILITY 0x04
	123	#define IPTOS_MINCOST 0x02
2d21ac55 A	124	#if 1
	125	/* ECN RFC3168 obsoletes RFC2481, and these will be deprecated soon. */
	126	#define IPTOS_CE 0x01
	127	#define IPTOS_ECT 0x02
	128	#endif
9bccf70c	129
2d21ac55 A	130	/*
	131	* ECN (Explicit Congestion Notification) codepoints in RFC3168
	132	* mapped to the lower 2 bits of the TOS field.
	133	*/
	134	#define IPTOS_ECN_NOTECT 0x00 /* not-ECT */
	135	#define IPTOS_ECN_ECT1 0x01 /* ECN-capable transport (1) */
	136	#define IPTOS_ECN_ECT0 0x02 /* ECN-capable transport (0) */
	137	#define IPTOS_ECN_CE 0x03 /* congestion experienced */
	138	#define IPTOS_ECN_MASK 0x03 /* ECN field mask */
1c79356b A	139
	140	/*
	141	* Definitions for IP precedence (also in ip_tos) (hopefully unused)
	142	*/
	143	#define IPTOS_PREC_NETCONTROL 0xe0
	144	#define IPTOS_PREC_INTERNETCONTROL 0xc0
	145	#define IPTOS_PREC_CRITIC_ECP 0xa0
	146	#define IPTOS_PREC_FLASHOVERRIDE 0x80
	147	#define IPTOS_PREC_FLASH 0x60
	148	#define IPTOS_PREC_IMMEDIATE 0x40
	149	#define IPTOS_PREC_PRIORITY 0x20
	150	#define IPTOS_PREC_ROUTINE 0x00
	151
	152	/*
	153	* Definitions for options.
	154	*/
	155	#define IPOPT_COPIED(o) ((o)&0x80)
	156	#define IPOPT_CLASS(o) ((o)&0x60)
	157	#define IPOPT_NUMBER(o) ((o)&0x1f)
	158
	159	#define IPOPT_CONTROL 0x00
	160	#define IPOPT_RESERVED1 0x20
	161	#define IPOPT_DEBMEAS 0x40
	162	#define IPOPT_RESERVED2 0x60
	163
	164	#define IPOPT_EOL 0 /* end of option list */
	165	#define IPOPT_NOP 1 /* no operation */
	166
	167	#define IPOPT_RR 7 /* record packet route */
	168	#define IPOPT_TS 68 /* timestamp */
	169	#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
	170	#define IPOPT_LSRR 131 /* loose source route */
	171	#define IPOPT_SATID 136 /* satnet id */
	172	#define IPOPT_SSRR 137 /* strict source route */
	173	#define IPOPT_RA 148 /* router alert */
	174
	175	/*
	176	* Offsets to fields in options other than EOL and NOP.
	177	*/
	178	#define IPOPT_OPTVAL 0 /* option ID */
	179	#define IPOPT_OLEN 1 /* option length */
	180	#define IPOPT_OFFSET 2 /* offset within option */
	181	#define IPOPT_MINOFF 4 /* min value of above */
	182
	183	/*
	184	* Time stamp option structure.
	185	*/
	186	struct ip_timestamp {
	187	u_char ipt_code; /* IPOPT_TS */
	188	u_char ipt_len; /* size of structure (variable) */
	189	u_char ipt_ptr; /* index of current entry */
	190	#if BYTE_ORDER == LITTLE_ENDIAN
	191	u_int ipt_flg:4, /* flags, see below */
	192	ipt_oflw:4; /* overflow counter */
	193	#endif
	194	#if BYTE_ORDER == BIG_ENDIAN
	195	u_int ipt_oflw:4, /* overflow counter */
	196	ipt_flg:4; /* flags, see below */
	197	#endif
	198	union ipt_timestamp {
	199	n_long ipt_time[1];
	200	struct ipt_ta {
	201	struct in_addr ipt_addr;
	202	n_long ipt_time;
203	} ipt_ta[1];
204	} ipt_timestamp;
205	};
206
207	/* flag bits for ipt_flg */
208	#define IPOPT_TS_TSONLY 0 /* timestamps only */
209	#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
210	#define IPOPT_TS_PRESPEC 3 /* specified modules only */
211
212	/* bits for security (not byte swapped) */
213	#define IPOPT_SECUR_UNCLASS 0x0000
214	#define IPOPT_SECUR_CONFID 0xf135
215	#define IPOPT_SECUR_EFTO 0x789a
216	#define IPOPT_SECUR_MMMM 0xbc4d
217	#define IPOPT_SECUR_RESTR 0xaf13
218	#define IPOPT_SECUR_SECRET 0xd788
219	#define IPOPT_SECUR_TOPSECRET 0x6bc5
220
221	/*
222	* Internet implementation parameters.
223	*/
224	#define MAXTTL 255 /* maximum time to live (seconds) */
225	#define IPDEFTTL 64 /* default ttl, from RFC 1340 */
226	#define IPFRAGTTL 60 /* time to live for frags, slowhz */
227	#define IPTTLDEC 1 /* subtracted when forwarding */
228
229	#define IP_MSS 576 /* default maximum segment size */
230
231	#endif