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 | |