![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ip.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple Darwin 0.x] / kernel / bsd / netinet|
Return to ip.h CVS log | Up to [Apple Darwin 0.x] / kernel / bsd / netinet |
1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*
27: * Copyright (c) 1982, 1986, 1993
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)ip.h 8.2 (Berkeley) 6/1/94
59: */
60:
61: /*
62: * Definitions for internet protocol version 4.
63: * Per RFC 791, September 1981.
64: */
65: #define IPVERSION 4
66:
67: /*
68: * Structure of an internet header, naked of options.
69: *
70: * We declare ip_len and ip_off to be short, rather than u_short
71: * pragmatically since otherwise unsigned comparisons can result
72: * against negative integers quite easily, and fail in subtle ways.
73: */
74: struct ip {
75: #if BYTE_ORDER == LITTLE_ENDIAN
76: u_char ip_hl:4, /* header length */
77: ip_v:4; /* version */
78: #endif
79: #if BYTE_ORDER == BIG_ENDIAN
80: u_char ip_v:4, /* version */
81: ip_hl:4; /* header length */
82: #endif
83: u_char ip_tos; /* type of service */
84: short ip_len; /* total length */
85: u_short ip_id; /* identification */
86: short ip_off; /* fragment offset field */
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: #define IP_MAXPACKET 65535 /* maximum packet size */
97:
98: /*
99: * Definitions for IP type of service (ip_tos)
100: */
101: #define IPTOS_LOWDELAY 0x10
102: #define IPTOS_THROUGHPUT 0x08
103: #define IPTOS_RELIABILITY 0x04
104:
105: /*
106: * Definitions for IP precedence (also in ip_tos) (hopefully unused)
107: */
108: #define IPTOS_PREC_NETCONTROL 0xe0
109: #define IPTOS_PREC_INTERNETCONTROL 0xc0
110: #define IPTOS_PREC_CRITIC_ECP 0xa0
111: #define IPTOS_PREC_FLASHOVERRIDE 0x80
112: #define IPTOS_PREC_FLASH 0x60
113: #define IPTOS_PREC_IMMEDIATE 0x40
114: #define IPTOS_PREC_PRIORITY 0x20
115: #define IPTOS_PREC_ROUTINE 0x00
116:
117: /*
118: * Definitions for options.
119: */
120: #define IPOPT_COPIED(o) ((o)&0x80)
121: #define IPOPT_CLASS(o) ((o)&0x60)
122: #define IPOPT_NUMBER(o) ((o)&0x1f)
123:
124: #define IPOPT_CONTROL 0x00
125: #define IPOPT_RESERVED1 0x20
126: #define IPOPT_DEBMEAS 0x40
127: #define IPOPT_RESERVED2 0x60
128:
129: #define IPOPT_EOL 0 /* end of option list */
130: #define IPOPT_NOP 1 /* no operation */
131:
132: #define IPOPT_RR 7 /* record packet route */
133: #define IPOPT_TS 68 /* timestamp */
134: #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
135: #define IPOPT_LSRR 131 /* loose source route */
136: #define IPOPT_SATID 136 /* satnet id */
137: #define IPOPT_SSRR 137 /* strict source route */
138:
139: /*
140: * Offsets to fields in options other than EOL and NOP.
141: */
142: #define IPOPT_OPTVAL 0 /* option ID */
143: #define IPOPT_OLEN 1 /* option length */
144: #define IPOPT_OFFSET 2 /* offset within option */
145: #define IPOPT_MINOFF 4 /* min value of above */
146:
147: /*
148: * Time stamp option structure.
149: */
150: struct ip_timestamp {
151: u_char ipt_code; /* IPOPT_TS */
152: u_char ipt_len; /* size of structure (variable) */
153: u_char ipt_ptr; /* index of current entry */
154: #if BYTE_ORDER == LITTLE_ENDIAN
155: u_char ipt_flg:4, /* flags, see below */
156: ipt_oflw:4; /* overflow counter */
157: #endif
158: #if BYTE_ORDER == BIG_ENDIAN
159: u_char ipt_oflw:4, /* overflow counter */
160: ipt_flg:4; /* flags, see below */
161: #endif
162: union ipt_timestamp {
163: n_long ipt_time[1];
164: struct ipt_ta {
165: struct in_addr ipt_addr;
166: n_long ipt_time;
167: } ipt_ta[1];
168: } ipt_timestamp;
169: };
170:
171: /* flag bits for ipt_flg */
172: #define IPOPT_TS_TSONLY 0 /* timestamps only */
173: #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
174: #define IPOPT_TS_PRESPEC 3 /* specified modules only */
175:
176: /* bits for security (not byte swapped) */
177: #define IPOPT_SECUR_UNCLASS 0x0000
178: #define IPOPT_SECUR_CONFID 0xf135
179: #define IPOPT_SECUR_EFTO 0x789a
180: #define IPOPT_SECUR_MMMM 0xbc4d
181: #define IPOPT_SECUR_RESTR 0xaf13
182: #define IPOPT_SECUR_SECRET 0xd788
183: #define IPOPT_SECUR_TOPSECRET 0x6bc5
184:
185: /*
186: * Internet implementation parameters.
187: */
188: #define MAXTTL 255 /* maximum time to live (seconds) */
189: #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
190: #define IPFRAGTTL 60 /* time to live for frags, slowhz */
191: #define IPTTLDEC 1 /* subtracted when forwarding */
192:
193: #define IP_MSS 576 /* default maximum segment size */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.