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