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