Watt-32 tcp/ip  2.2 dev-rel.10
ip.h
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1 
5 /*
6  * Copyright (c) 1982, 1986, 1993
7  * The Regents of the University of California. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  * must display the following acknowledgement:
19  * This product includes software developed by the University of
20  * California, Berkeley and its contributors.
21  * 4. Neither the name of the University nor the names of its contributors
22  * may be used to endorse or promote products derived from this software
23  * without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  * @(#)ip.h 8.2 (Berkeley) 6/1/94
38  * $Id: ip.h,v 1.10 1996/10/23 18:35:49 wollman Exp $
39  */
40 
41 #ifndef __NETINET_IP_H
42 #define __NETINET_IP_H
43 
44 #ifndef __NETINET_IN_SYSTM_H
45 #include <netinet/in_systm.h>
46 #endif
47 
48 #if defined(__TURBOC__) || defined(__BORLANDC__)
49 #pragma warn -bbf- /* "Bitfields must be signed or unsigned int" warning */
50 #endif
51 
52 /*
53  * Definitions for internet protocol version 4.
54  * Per RFC 791, September 1981.
55  */
56 #define IPVERSION 4
57 
58 #include <sys/pack_on.h>
59 
60 /*
61  * Structure of an internet header, naked of options.
62  *
63  * We declare ip_len and ip_off to be short, rather than u_short
64  * pragmatically since otherwise unsigned comparisons can result
65  * against negative integers quite easily, and fail in subtle ways.
66  */
67 struct ip {
68 #ifdef _IP_VHL
69  u_char ip_vhl; /* version << 4 | header length >> 2 */
70 #else
71  u_char ip_hl:4; /* header length */
72  u_char ip_v:4; /* version */
73 #endif
74  u_char ip_tos; /* type of service */
75  u_short ip_len; /* total length */
76  u_short ip_id; /* identification */
77  u_short ip_off; /* fragment offset field */
78 #define IP_DF 0x4000 /* dont fragment flag */
79 #define IP_MF 0x2000 /* more fragments flag */
80 #define IP_OFFMASK 0x1FFF /* mask for fragmenting bits */
81  u_char ip_ttl; /* time to live */
82  u_char ip_p; /* protocol */
83  u_short ip_sum; /* checksum */
84  struct in_addr ip_src,ip_dst; /* source and dest address */
85 };
86 
87 #ifdef _IP_VHL
88 #define IP_MAKE_VHL(v,hl) ((v) << 4 | (hl))
89 #define IP_VHL_HL(vhl) ((vhl) & 0x0f)
90 #define IP_VHL_V(vhl) ((vhl) >> 4)
91 #define IP_VHL_BORING 0x45
92 #endif
93 
94 #define IP_MAXPACKET 65535 /* maximum packet size */
95 
96 /*
97  * Definitions for IP type of service (ip_tos)
98  */
99 #define IPTOS_LOWDELAY 0x10
100 #define IPTOS_THROUGHPUT 0x08
101 #define IPTOS_RELIABILITY 0x04
102 #define IPTOS_MINCOST 0x02
103 
104 /*
105  * Definitions for IP precedence (also in ip_tos) (hopefully unused)
106  */
107 #define IPTOS_PREC_NETCONTROL 0xe0
108 #define IPTOS_PREC_INTERNETCONTROL 0xc0
109 #define IPTOS_PREC_CRITIC_ECP 0xa0
110 #define IPTOS_PREC_FLASHOVERRIDE 0x80
111 #define IPTOS_PREC_FLASH 0x60
112 #define IPTOS_PREC_IMMEDIATE 0x40
113 #define IPTOS_PREC_PRIORITY 0x20
114 #define IPTOS_PREC_ROUTINE 0x00
115 
116 /*
117  * Definitions for options.
118  */
119 #define IPOPT_COPIED(o) ((o)&0x80)
120 #define IPOPT_CLASS(o) ((o)&0x60)
121 #define IPOPT_NUMBER(o) ((o)&0x1f)
122 
123 #define IPOPT_CONTROL 0x00
124 #define IPOPT_RESERVED1 0x20
125 #define IPOPT_DEBMEAS 0x40
126 #define IPOPT_RESERVED2 0x60
127 
128 #define IPOPT_EOL 0 /* end of option list */
129 #define IPOPT_NOP 1 /* no operation */
130 
131 #define IPOPT_RR 7 /* record packet route */
132 #define IPOPT_TS 68 /* timestamp */
133 #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
134 #define IPOPT_LSRR 131 /* loose source route */
135 #define IPOPT_SATID 136 /* satnet id */
136 #define IPOPT_SSRR 137 /* strict source route */
137 #define IPOPT_RA 148 /* router alert */
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  u_char ipt_flg:4; /* flags, see below */
155  u_char ipt_oflw:4; /* overflow counter */
157  n_long ipt_time[1];
158  struct ipt_ta {
159  struct in_addr ipt_addr;
160  n_long ipt_time;
161  } ipt_ta[1];
162  } ipt_timestamp;
163 };
164 
165 #include <sys/pack_off.h>
166 
167 /* flag bits for ipt_flg */
168 #define IPOPT_TS_TSONLY 0 /* timestamps only */
169 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
170 #define IPOPT_TS_PRESPEC 3 /* specified modules only */
171 
172 /* bits for security (not byte swapped) */
173 #define IPOPT_SECUR_UNCLASS 0x0000
174 #define IPOPT_SECUR_CONFID 0xf135
175 #define IPOPT_SECUR_EFTO 0x789a
176 #define IPOPT_SECUR_MMMM 0xbc4d
177 #define IPOPT_SECUR_RESTR 0xaf13
178 #define IPOPT_SECUR_SECRET 0xd788
179 #define IPOPT_SECUR_TOPSECRET 0x6bc5
180 
181 /*
182  * Internet implementation parameters.
183  */
184 #define MAXTTL 255 /* maximum time to live (seconds) */
185 #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
186 #define IPFRAGTTL 60 /* time to live for frags, slowhz */
187 #define IPTTLDEC 1 /* subtracted when forwarding */
188 
189 #define IP_MSS 576 /* default maximum segment size */
190 
191 #if defined(__TURBOC__) || defined(__BORLANDC__)
192 #pragma warn -bbf.
193 #endif
194 
195 #endif
Definition: ip.h:67
Definition: in.h:146