1 /* 2 * Copyright (c) 2000-2016 Apple 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 #ifndef DRIVERKIT 67 #include <sys/appleapiopts.h> 68 #include <sys/types.h> /* XXX temporary hack to get u_ types */ 69 #else 70 #include <sys/_types.h> 71 #include <sys/_types/_u_int.h> 72 #include <sys/_types/_u_char.h> 73 #include <sys/_types/_u_short.h> 74 75 #include <machine/endian.h> 76 #endif /* DRIVERKIT */ 77 78 #include <netinet/in.h> 79 #include <netinet/in_systm.h> 80 81 /* 82 * Definitions for internet protocol version 4. 83 * Per RFC 791, September 1981. 84 */ 85 #define IPVERSION 4 86 87 /* 88 * Structure of an internet header, naked of options. 89 */ 90 struct ip { 91 #ifdef _IP_VHL 92 u_char ip_vhl; /* version << 4 | header length >> 2 */ 93 #else 94 #if BYTE_ORDER == LITTLE_ENDIAN 95 u_int ip_hl:4, /* header length */ 96 ip_v:4; /* version */ 97 #endif 98 #if BYTE_ORDER == BIG_ENDIAN 99 u_int ip_v:4, /* version */ 100 ip_hl:4; /* header length */ 101 #endif 102 #endif /* not _IP_VHL */ 103 u_char ip_tos; /* type of service */ 104 u_short ip_len; /* total length */ 105 u_short ip_id; /* identification */ 106 u_short ip_off; /* fragment offset field */ 107 #define IP_RF 0x8000 /* reserved fragment flag */ 108 #define IP_DF 0x4000 /* dont fragment flag */ 109 #define IP_MF 0x2000 /* more fragments flag */ 110 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ 111 u_char ip_ttl; /* time to live */ 112 u_char ip_p; /* protocol */ 113 u_short ip_sum; /* checksum */ 114 struct in_addr ip_src, ip_dst; /* source and dest address */ 115 }; 116 117 #ifdef _IP_VHL 118 #define IP_MAKE_VHL(v, hl) ((uint8_t)((v) << 4 | (hl))) 119 #define IP_VHL_HL(vhl) ((vhl) & 0x0f) 120 #define IP_VHL_V(vhl) ((vhl) >> 4) 121 #define IP_VHL_BORING 0x45 122 #endif 123 124 #define IP_MAXPACKET 65535 /* maximum packet size */ 125 126 /* 127 * Definitions for IP type of service (ip_tos) 128 */ 129 #define IPTOS_LOWDELAY 0x10 130 #define IPTOS_THROUGHPUT 0x08 131 #define IPTOS_RELIABILITY 0x04 132 #define IPTOS_MINCOST 0x02 133 #if 1 134 /* ECN RFC3168 obsoletes RFC2481, and these will be deprecated soon. */ 135 #define IPTOS_CE 0x01 136 #define IPTOS_ECT 0x02 137 #endif 138 139 #define IPTOS_DSCP_SHIFT 2 140 141 /* 142 * ECN (Explicit Congestion Notification) codepoints in RFC3168 143 * mapped to the lower 2 bits of the TOS field. 144 */ 145 #define IPTOS_ECN_NOTECT 0x00 /* not-ECT */ 146 #define IPTOS_ECN_ECT1 0x01 /* ECN-capable transport (1) */ 147 #define IPTOS_ECN_ECT0 0x02 /* ECN-capable transport (0) */ 148 #define IPTOS_ECN_CE 0x03 /* congestion experienced */ 149 #define IPTOS_ECN_MASK 0x03 /* ECN field mask */ 150 151 /* 152 * Definitions for IP precedence (also in ip_tos) (hopefully unused) 153 */ 154 #define IPTOS_PREC_NETCONTROL 0xe0 155 #define IPTOS_PREC_INTERNETCONTROL 0xc0 156 #define IPTOS_PREC_CRITIC_ECP 0xa0 157 #define IPTOS_PREC_FLASHOVERRIDE 0x80 158 #define IPTOS_PREC_FLASH 0x60 159 #define IPTOS_PREC_IMMEDIATE 0x40 160 #define IPTOS_PREC_PRIORITY 0x20 161 #define IPTOS_PREC_ROUTINE 0x00 162 163 #ifdef PRIVATE 164 /* 165 * Definitions of traffic class for use within wireless LAN. 166 * Mainly used by AFP for backup. Not recommended for general use. 167 */ 168 #define IP_TCLASS_BE 0x00 /* standard, best effort */ 169 #define IP_TCLASS_BK 0x20 /* Background, low priority */ 170 #define IP_TCLASS_VI 0x80 /* Interactive */ 171 #define IP_TCLASS_VO 0xc0 /* Signalling */ 172 173 #endif 174 /* 175 * Definitions for options. 176 */ 177 #define IPOPT_COPIED(o) ((o)&0x80) 178 #define IPOPT_CLASS(o) ((o)&0x60) 179 #define IPOPT_NUMBER(o) ((o)&0x1f) 180 181 #define IPOPT_CONTROL 0x00 182 #define IPOPT_RESERVED1 0x20 183 #define IPOPT_DEBMEAS 0x40 184 #define IPOPT_RESERVED2 0x60 185 186 #define IPOPT_EOL 0 /* end of option list */ 187 #define IPOPT_NOP 1 /* no operation */ 188 189 #define IPOPT_RR 7 /* record packet route */ 190 #define IPOPT_TS 68 /* timestamp */ 191 #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ 192 #define IPOPT_LSRR 131 /* loose source route */ 193 #define IPOPT_SATID 136 /* satnet id */ 194 #define IPOPT_SSRR 137 /* strict source route */ 195 #define IPOPT_RA 148 /* router alert */ 196 197 /* 198 * Offsets to fields in options other than EOL and NOP. 199 */ 200 #define IPOPT_OPTVAL 0 /* option ID */ 201 #define IPOPT_OLEN 1 /* option length */ 202 #define IPOPT_OFFSET 2 /* offset within option */ 203 #define IPOPT_MINOFF 4 /* min value of above */ 204 205 /* 206 * Time stamp option structure. 207 */ 208 struct ip_timestamp { 209 u_char ipt_code; /* IPOPT_TS */ 210 u_char ipt_len; /* size of structure (variable) */ 211 u_char ipt_ptr; /* index of current entry */ 212 #if BYTE_ORDER == LITTLE_ENDIAN 213 u_int ipt_flg:4, /* flags, see below */ 214 ipt_oflw:4; /* overflow counter */ 215 #endif 216 #if BYTE_ORDER == BIG_ENDIAN 217 u_int ipt_oflw:4, /* overflow counter */ 218 ipt_flg:4; /* flags, see below */ 219 #endif 220 union ipt_timestamp { 221 n_long ipt_time[1]; 222 struct ipt_ta { 223 struct in_addr ipt_addr; 224 n_long ipt_time; 225 } ipt_ta[1]; 226 } ipt_timestamp; 227 }; 228 229 /* flag bits for ipt_flg */ 230 #define IPOPT_TS_TSONLY 0 /* timestamps only */ 231 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 232 #define IPOPT_TS_PRESPEC 3 /* specified modules only */ 233 234 /* bits for security (not byte swapped) */ 235 #define IPOPT_SECUR_UNCLASS 0x0000 236 #define IPOPT_SECUR_CONFID 0xf135 237 #define IPOPT_SECUR_EFTO 0x789a 238 #define IPOPT_SECUR_MMMM 0xbc4d 239 #define IPOPT_SECUR_RESTR 0xaf13 240 #define IPOPT_SECUR_SECRET 0xd788 241 #define IPOPT_SECUR_TOPSECRET 0x6bc5 242 243 /* 244 * Internet implementation parameters. 245 */ 246 #define MAXTTL 255 /* maximum time to live (seconds) */ 247 #define IPDEFTTL 64 /* default ttl, from RFC 1340 */ 248 #define IPFRAGTTL 30 /* time to live for frags (seconds) */ 249 #define IPTTLDEC 1 /* subtracted when forwarding */ 250 251 #define IP_MSS 576 /* default maximum segment size */ 252 253 #endif 254