1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 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. 14 * 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 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 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. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 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 61 * $FreeBSD: src/sys/netinet/ip.h,v 1.17 1999/12/22 19:13:20 shin Exp $ 62 */ 63 64#ifndef _NETINET_IP_H_ 65#define _NETINET_IP_H_ 66#include <sys/appleapiopts.h> 67#include <sys/types.h> /* XXX temporary hack to get u_ types */ 68#include <netinet/in.h> 69#include <netinet/in_systm.h> 70 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 */ 81struct 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 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 129 130/* 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 */ 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#ifdef PRIVATE 153/* 154 * Definitions of traffic class for use within wireless LAN. 155 * Mainly used by AFP for backup. Not recommended for general use. 156 */ 157#define IP_TCLASS_BE 0x00 /* standard, best effort */ 158#define IP_TCLASS_BK 0x20 /* Background, low priority */ 159#define IP_TCLASS_VI 0x80 /* Interactive */ 160#define IP_TCLASS_VO 0xc0 /* Signalling */ 161 162#endif 163/* 164 * Definitions for options. 165 */ 166#define IPOPT_COPIED(o) ((o)&0x80) 167#define IPOPT_CLASS(o) ((o)&0x60) 168#define IPOPT_NUMBER(o) ((o)&0x1f) 169 170#define IPOPT_CONTROL 0x00 171#define IPOPT_RESERVED1 0x20 172#define IPOPT_DEBMEAS 0x40 173#define IPOPT_RESERVED2 0x60 174 175#define IPOPT_EOL 0 /* end of option list */ 176#define IPOPT_NOP 1 /* no operation */ 177 178#define IPOPT_RR 7 /* record packet route */ 179#define IPOPT_TS 68 /* timestamp */ 180#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ 181#define IPOPT_LSRR 131 /* loose source route */ 182#define IPOPT_SATID 136 /* satnet id */ 183#define IPOPT_SSRR 137 /* strict source route */ 184#define IPOPT_RA 148 /* router alert */ 185 186/* 187 * Offsets to fields in options other than EOL and NOP. 188 */ 189#define IPOPT_OPTVAL 0 /* option ID */ 190#define IPOPT_OLEN 1 /* option length */ 191#define IPOPT_OFFSET 2 /* offset within option */ 192#define IPOPT_MINOFF 4 /* min value of above */ 193 194/* 195 * Time stamp option structure. 196 */ 197struct ip_timestamp { 198 u_char ipt_code; /* IPOPT_TS */ 199 u_char ipt_len; /* size of structure (variable) */ 200 u_char ipt_ptr; /* index of current entry */ 201#if BYTE_ORDER == LITTLE_ENDIAN 202 u_int ipt_flg:4, /* flags, see below */ 203 ipt_oflw:4; /* overflow counter */ 204#endif 205#if BYTE_ORDER == BIG_ENDIAN 206 u_int ipt_oflw:4, /* overflow counter */ 207 ipt_flg:4; /* flags, see below */ 208#endif 209 union ipt_timestamp { 210 n_long ipt_time[1]; 211 struct ipt_ta { 212 struct in_addr ipt_addr; 213 n_long ipt_time; 214 } ipt_ta[1]; 215 } ipt_timestamp; 216}; 217 218/* flag bits for ipt_flg */ 219#define IPOPT_TS_TSONLY 0 /* timestamps only */ 220#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 221#define IPOPT_TS_PRESPEC 3 /* specified modules only */ 222 223/* bits for security (not byte swapped) */ 224#define IPOPT_SECUR_UNCLASS 0x0000 225#define IPOPT_SECUR_CONFID 0xf135 226#define IPOPT_SECUR_EFTO 0x789a 227#define IPOPT_SECUR_MMMM 0xbc4d 228#define IPOPT_SECUR_RESTR 0xaf13 229#define IPOPT_SECUR_SECRET 0xd788 230#define IPOPT_SECUR_TOPSECRET 0x6bc5 231 232/* 233 * Internet implementation parameters. 234 */ 235#define MAXTTL 255 /* maximum time to live (seconds) */ 236#define IPDEFTTL 64 /* default ttl, from RFC 1340 */ 237#define IPFRAGTTL 60 /* time to live for frags, slowhz */ 238#define IPTTLDEC 1 /* subtracted when forwarding */ 239 240#define IP_MSS 576 /* default maximum segment size */ 241 242#endif 243