| 1 | /*
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| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
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| 3 | *
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| 4 | * @APPLE_LICENSE_HEADER_START@
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| 5 | *
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| 6 | * The contents of this file constitute Original Code as defined in and
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| 7 | * are subject to the Apple Public Source License Version 1.1 (the
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| 8 | * "License"). You may not use this file except in compliance with the
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| 9 | * License. Please obtain a copy of the License at
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| 10 | * http://www.apple.com/publicsource and read it before using this file.
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| 11 | *
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| 12 | * This Original Code and all software distributed under the License are
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| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
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| 17 | * License for the specific language governing rights and limitations
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| 18 | * under the License.
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| 19 | *
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| 20 | * @APPLE_LICENSE_HEADER_END@
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| 21 | */
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| 22 | /*
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| 23 | * Copyright (c) 1982, 1986, 1993
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| 24 | * The Regents of the University of California. All rights reserved.
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| 25 | *
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| 26 | * Redistribution and use in source and binary forms, with or without
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| 27 | * modification, are permitted provided that the following conditions
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| 28 | * are met:
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| 29 | * 1. Redistributions of source code must retain the above copyright
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| 30 | * notice, this list of conditions and the following disclaimer.
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| 31 | * 2. Redistributions in binary form must reproduce the above copyright
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| 32 | * notice, this list of conditions and the following disclaimer in the
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| 33 | * documentation and/or other materials provided with the distribution.
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| 34 | * 3. All advertising materials mentioning features or use of this software
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| 35 | * must display the following acknowledgement:
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| 36 | * This product includes software developed by the University of
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| 37 | * California, Berkeley and its contributors.
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| 38 | * 4. Neither the name of the University nor the names of its contributors
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| 39 | * may be used to endorse or promote products derived from this software
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| 40 | * without specific prior written permission.
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| 41 | *
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| 42 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 43 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 44 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 45 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 46 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 47 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 48 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 49 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 50 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 51 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 52 | * SUCH DAMAGE.
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| 53 | *
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| 54 | * @(#)ip.h 8.2 (Berkeley) 6/1/94
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| 55 | * $FreeBSD: src/sys/netinet/ip.h,v 1.17 1999/12/22 19:13:20 shin Exp $
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| 56 | */
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| 57 |
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| 58 | #ifndef _NETINET_IP_H_
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| 59 | #define _NETINET_IP_H_
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| 60 | #include <sys/appleapiopts.h>
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| 61 | #include <sys/types.h> /* XXX temporary hack to get u_ types */
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| 62 | #include <netinet/in.h>
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| 63 | #include <netinet/in_systm.h>
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| 64 |
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| 65 |
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| 66 | /*
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| 67 | * Definitions for internet protocol version 4.
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| 68 | * Per RFC 791, September 1981.
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| 69 | */
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| 70 | #define IPVERSION 4
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| 71 |
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| 72 | /*
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| 73 | * Structure of an internet header, naked of options.
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| 74 | */
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| 75 | struct ip {
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| 76 | #ifdef _IP_VHL
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| 77 | u_char ip_vhl; /* version << 4 | header length >> 2 */
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| 78 | #else
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| 79 | #if BYTE_ORDER == LITTLE_ENDIAN
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| 80 | u_int ip_hl:4, /* header length */
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| 81 | ip_v:4; /* version */
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| 82 | #endif
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| 83 | #if BYTE_ORDER == BIG_ENDIAN
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| 84 | u_int ip_v:4, /* version */
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| 85 | ip_hl:4; /* header length */
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| 86 | #endif
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| 87 | #endif /* not _IP_VHL */
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| 88 | u_char ip_tos; /* type of service */
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| 89 | u_short ip_len; /* total length */
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| 90 | u_short ip_id; /* identification */
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| 91 | u_short ip_off; /* fragment offset field */
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| 92 | #define IP_RF 0x8000 /* reserved fragment flag */
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| 93 | #define IP_DF 0x4000 /* dont fragment flag */
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| 94 | #define IP_MF 0x2000 /* more fragments flag */
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| 95 | #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
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| 96 | u_char ip_ttl; /* time to live */
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| 97 | u_char ip_p; /* protocol */
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| 98 | u_short ip_sum; /* checksum */
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| 99 | struct in_addr ip_src,ip_dst; /* source and dest address */
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| 100 | };
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| 101 |
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| 102 | #ifdef _IP_VHL
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| 103 | #define IP_MAKE_VHL(v, hl) ((v) << 4 | (hl))
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| 104 | #define IP_VHL_HL(vhl) ((vhl) & 0x0f)
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| 105 | #define IP_VHL_V(vhl) ((vhl) >> 4)
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| 106 | #define IP_VHL_BORING 0x45
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| 107 | #endif
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| 108 |
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| 109 | #define IP_MAXPACKET 65535 /* maximum packet size */
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| 110 |
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| 111 | /*
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| 112 | * Definitions for IP type of service (ip_tos)
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| 113 | */
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| 114 | #define IPTOS_LOWDELAY 0x10
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| 115 | #define IPTOS_THROUGHPUT 0x08
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| 116 | #define IPTOS_RELIABILITY 0x04
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| 117 | #define IPTOS_MINCOST 0x02
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| 118 | /* ECN bits proposed by Sally Floyd */
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| 119 | #define IPTOS_CE 0x01 /* congestion experienced */
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| 120 | #define IPTOS_ECT 0x02 /* ECN-capable transport */
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| 121 |
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| 122 |
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| 123 | /*
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| 124 | * Definitions for IP precedence (also in ip_tos) (hopefully unused)
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| 125 | */
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| 126 | #define IPTOS_PREC_NETCONTROL 0xe0
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| 127 | #define IPTOS_PREC_INTERNETCONTROL 0xc0
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| 128 | #define IPTOS_PREC_CRITIC_ECP 0xa0
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| 129 | #define IPTOS_PREC_FLASHOVERRIDE 0x80
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| 130 | #define IPTOS_PREC_FLASH 0x60
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| 131 | #define IPTOS_PREC_IMMEDIATE 0x40
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| 132 | #define IPTOS_PREC_PRIORITY 0x20
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| 133 | #define IPTOS_PREC_ROUTINE 0x00
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| 134 |
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| 135 | /*
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| 136 | * Definitions for options.
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| 137 | */
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| 138 | #define IPOPT_COPIED(o) ((o)&0x80)
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| 139 | #define IPOPT_CLASS(o) ((o)&0x60)
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| 140 | #define IPOPT_NUMBER(o) ((o)&0x1f)
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| 141 |
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| 142 | #define IPOPT_CONTROL 0x00
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| 143 | #define IPOPT_RESERVED1 0x20
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| 144 | #define IPOPT_DEBMEAS 0x40
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| 145 | #define IPOPT_RESERVED2 0x60
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| 146 |
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| 147 | #define IPOPT_EOL 0 /* end of option list */
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| 148 | #define IPOPT_NOP 1 /* no operation */
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| 149 |
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| 150 | #define IPOPT_RR 7 /* record packet route */
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| 151 | #define IPOPT_TS 68 /* timestamp */
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| 152 | #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
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| 153 | #define IPOPT_LSRR 131 /* loose source route */
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| 154 | #define IPOPT_SATID 136 /* satnet id */
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| 155 | #define IPOPT_SSRR 137 /* strict source route */
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| 156 | #define IPOPT_RA 148 /* router alert */
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| 157 |
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| 158 | /*
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| 159 | * Offsets to fields in options other than EOL and NOP.
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| 160 | */
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| 161 | #define IPOPT_OPTVAL 0 /* option ID */
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| 162 | #define IPOPT_OLEN 1 /* option length */
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| 163 | #define IPOPT_OFFSET 2 /* offset within option */
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| 164 | #define IPOPT_MINOFF 4 /* min value of above */
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| 165 |
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| 166 | /*
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| 167 | * Time stamp option structure.
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| 168 | */
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| 169 | struct ip_timestamp {
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| 170 | u_char ipt_code; /* IPOPT_TS */
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| 171 | u_char ipt_len; /* size of structure (variable) */
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| 172 | u_char ipt_ptr; /* index of current entry */
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| 173 | #if BYTE_ORDER == LITTLE_ENDIAN
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| 174 | u_int ipt_flg:4, /* flags, see below */
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| 175 | ipt_oflw:4; /* overflow counter */
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| 176 | #endif
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| 177 | #if BYTE_ORDER == BIG_ENDIAN
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| 178 | u_int ipt_oflw:4, /* overflow counter */
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| 179 | ipt_flg:4; /* flags, see below */
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| 180 | #endif
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| 181 | union ipt_timestamp {
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| 182 | n_long ipt_time[1];
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| 183 | struct ipt_ta {
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| 184 | struct in_addr ipt_addr;
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| 185 | n_long ipt_time;
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| 186 | } ipt_ta[1];
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| 187 | } ipt_timestamp;
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| 188 | };
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| 189 |
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| 190 | /* flag bits for ipt_flg */
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| 191 | #define IPOPT_TS_TSONLY 0 /* timestamps only */
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| 192 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
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| 193 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */
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| 194 |
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| 195 | /* bits for security (not byte swapped) */
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| 196 | #define IPOPT_SECUR_UNCLASS 0x0000
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| 197 | #define IPOPT_SECUR_CONFID 0xf135
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| 198 | #define IPOPT_SECUR_EFTO 0x789a
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| 199 | #define IPOPT_SECUR_MMMM 0xbc4d
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| 200 | #define IPOPT_SECUR_RESTR 0xaf13
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| 201 | #define IPOPT_SECUR_SECRET 0xd788
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| 202 | #define IPOPT_SECUR_TOPSECRET 0x6bc5
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| 203 |
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| 204 | /*
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| 205 | * Internet implementation parameters.
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| 206 | */
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| 207 | #define MAXTTL 255 /* maximum time to live (seconds) */
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| 208 | #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
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| 209 | #define IPFRAGTTL 60 /* time to live for frags, slowhz */
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| 210 | #define IPTTLDEC 1 /* subtracted when forwarding */
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| 211 |
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| 212 | #define IP_MSS 576 /* default maximum segment size */
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| 213 |
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| 214 | #endif
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