| 1 | /*
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| 2 | * Copyright (c) 1982, 1986, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * Portions copyright (c) 1999, 2000
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| 6 | * Intel Corporation.
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| 7 | * All rights reserved.
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| 8 | *
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| 9 | * Redistribution and use in source and binary forms, with or without
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| 10 | * modification, are permitted provided that the following conditions
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| 11 | * are met:
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| 12 | *
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | *
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| 16 | * 2. Redistributions in binary form must reproduce the above copyright
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| 17 | * notice, this list of conditions and the following disclaimer in the
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| 18 | * documentation and/or other materials provided with the distribution.
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| 19 | *
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| 20 | * 3. All advertising materials mentioning features or use of this software
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| 21 | * must display the following acknowledgement:
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| 22 | *
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| 23 | * This product includes software developed by the University of
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| 24 | * California, Berkeley, Intel Corporation, and its contributors.
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| 25 | *
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| 26 | * 4. Neither the name of University, Intel Corporation, or their respective
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| 27 | * contributors may be used to endorse or promote products derived from
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| 28 | * this software without specific prior written permission.
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| 29 | *
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| 30 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
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| 31 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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| 32 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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| 33 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS,
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| 34 | * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 35 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 36 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 37 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 38 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 39 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 40 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 41 | *
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| 42 | * @(#)ip.h 8.2 (Berkeley) 6/1/94
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| 43 | * $Id: ip.h,v 1.1.1.1 2006/05/30 06:12:48 hhzhou Exp $
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| 44 | */
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| 45 |
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| 46 | #ifndef _NETINET_IP_H_
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| 47 | #define _NETINET_IP_H_
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| 48 |
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| 49 | #ifndef _ORG_FREEBSD_
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| 50 | #define _IP_VHL
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| 51 | #endif
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| 52 |
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| 53 | /*
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| 54 | * Definitions for internet protocol version 4.
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| 55 | * Per RFC 791, September 1981.
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| 56 | */
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| 57 | #define IPVERSION 4
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| 58 |
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| 59 | /*
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| 60 | * Structure of an internet header, naked of options.
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| 61 | */
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| 62 | struct ip {
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| 63 | #ifdef _IP_VHL
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| 64 | u_char ip_vhl; /* version << 4 | header length >> 2 */
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| 65 | #else
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| 66 | #if BYTE_ORDER == LITTLE_ENDIAN
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| 67 | u_int ip_hl:4, /* header length */
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| 68 | ip_v:4; /* version */
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| 69 | #endif
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| 70 | #if BYTE_ORDER == BIG_ENDIAN
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| 71 | u_int ip_v:4, /* version */
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| 72 | ip_hl:4; /* header length */
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| 73 | #endif
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| 74 | #endif /* not _IP_VHL */
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| 75 | u_char ip_tos; /* type of service */
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| 76 | u_short ip_len; /* total length */
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| 77 | u_short ip_id; /* identification */
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| 78 | u_short ip_off; /* fragment offset field */
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| 79 | #define IP_RF 0x8000 /* reserved fragment flag */
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| 80 | #define IP_DF 0x4000 /* dont fragment flag */
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| 81 | #define IP_MF 0x2000 /* more fragments flag */
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| 82 | #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
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| 83 | u_char ip_ttl; /* time to live */
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| 84 | u_char ip_p; /* protocol */
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| 85 | u_short ip_sum; /* checksum */
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| 86 | struct in_addr ip_src,ip_dst; /* source and dest address */
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| 87 | };
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| 88 |
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| 89 | #ifdef _IP_VHL
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| 90 | #define IP_MAKE_VHL(v, hl) ((v) << 4 | (hl))
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| 91 | #define IP_VHL_HL(vhl) ((vhl) & 0x0f)
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| 92 | #define IP_VHL_V(vhl) ((vhl) >> 4)
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| 93 | #define IP_VHL_BORING 0x45
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| 94 | #endif
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| 95 |
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| 96 | #define IP_MAXPACKET 65535 /* maximum packet size */
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| 97 |
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| 98 | /*
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| 99 | * Definitions for IP type of service (ip_tos)
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| 100 | */
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| 101 | #define IPTOS_LOWDELAY 0x10
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| 102 | #define IPTOS_THROUGHPUT 0x08
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| 103 | #define IPTOS_RELIABILITY 0x04
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| 104 | #define IPTOS_MINCOST 0x02
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| 105 |
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| 106 | /*
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| 107 | * Definitions for IP precedence (also in ip_tos) (hopefully unused)
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| 108 | */
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| 109 | #define IPTOS_PREC_NETCONTROL 0xe0
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| 110 | #define IPTOS_PREC_INTERNETCONTROL 0xc0
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| 111 | #define IPTOS_PREC_CRITIC_ECP 0xa0
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| 112 | #define IPTOS_PREC_FLASHOVERRIDE 0x80
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| 113 | #define IPTOS_PREC_FLASH 0x60
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| 114 | #define IPTOS_PREC_IMMEDIATE 0x40
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| 115 | #define IPTOS_PREC_PRIORITY 0x20
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| 116 | #define IPTOS_PREC_ROUTINE 0x00
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| 117 |
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| 118 | /*
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| 119 | * Definitions for options.
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| 120 | */
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| 121 | #define IPOPT_COPIED(o) ((o)&0x80)
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| 122 | #define IPOPT_CLASS(o) ((o)&0x60)
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| 123 | #define IPOPT_NUMBER(o) ((o)&0x1f)
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| 124 |
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| 125 | #define IPOPT_CONTROL 0x00
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| 126 | #define IPOPT_RESERVED1 0x20
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| 127 | #define IPOPT_DEBMEAS 0x40
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| 128 | #define IPOPT_RESERVED2 0x60
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| 129 |
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| 130 | #define IPOPT_EOL 0 /* end of option list */
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| 131 | #define IPOPT_NOP 1 /* no operation */
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| 132 |
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| 133 | #define IPOPT_RR 7 /* record packet route */
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| 134 | #define IPOPT_TS 68 /* timestamp */
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| 135 | #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
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| 136 | #define IPOPT_LSRR 131 /* loose source route */
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| 137 | #define IPOPT_SATID 136 /* satnet id */
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| 138 | #define IPOPT_SSRR 137 /* strict source route */
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| 139 | #define IPOPT_RA 148 /* router alert */
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| 140 |
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| 141 | /*
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| 142 | * Offsets to fields in options other than EOL and NOP.
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| 143 | */
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| 144 | #define IPOPT_OPTVAL 0 /* option ID */
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| 145 | #define IPOPT_OLEN 1 /* option length */
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| 146 | #define IPOPT_OFFSET 2 /* offset within option */
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| 147 | #define IPOPT_MINOFF 4 /* min value of above */
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| 148 |
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| 149 | /*
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| 150 | * Time stamp option structure.
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| 151 | */
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| 152 | struct ip_timestamp {
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| 153 | u_char ipt_code; /* IPOPT_TS */
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| 154 | u_char ipt_len; /* size of structure (variable) */
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| 155 | u_char ipt_ptr; /* index of current entry */
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| 156 | #if BYTE_ORDER == LITTLE_ENDIAN
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| 157 | u_int ipt_flg:4, /* flags, see below */
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| 158 | ipt_oflw:4; /* overflow counter */
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| 159 | #endif
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| 160 | #if BYTE_ORDER == BIG_ENDIAN
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| 161 | u_int ipt_oflw:4, /* overflow counter */
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| 162 | ipt_flg:4; /* flags, see below */
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| 163 | #endif
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| 164 | union ipt_timestamp {
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| 165 | n_long ipt_time[1];
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| 166 | struct ipt_ta {
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| 167 | struct in_addr ipt_addr;
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| 168 | n_long ipt_time;
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| 169 | } ipt_ta[1];
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| 170 | } ipt_timestamp;
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| 171 | };
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| 172 |
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| 173 | /* flag bits for ipt_flg */
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| 174 | #define IPOPT_TS_TSONLY 0 /* timestamps only */
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| 175 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
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| 176 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */
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| 177 |
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| 178 | /* bits for security (not byte swapped) */
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| 179 | #define IPOPT_SECUR_UNCLASS 0x0000
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| 180 | #define IPOPT_SECUR_CONFID 0xf135
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| 181 | #define IPOPT_SECUR_EFTO 0x789a
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| 182 | #define IPOPT_SECUR_MMMM 0xbc4d
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| 183 | #define IPOPT_SECUR_RESTR 0xaf13
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| 184 | #define IPOPT_SECUR_SECRET 0xd788
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| 185 | #define IPOPT_SECUR_TOPSECRET 0x6bc5
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| 186 |
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| 187 | /*
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| 188 | * Internet implementation parameters.
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| 189 | */
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| 190 | #define MAXTTL 255 /* maximum time to live (seconds) */
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| 191 | #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
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| 192 | #define IPFRAGTTL 60 /* time to live for frags, slowhz */
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| 193 | #define IPTTLDEC 1 /* subtracted when forwarding */
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| 194 |
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| 195 | #define IP_MSS 576 /* default maximum segment size */
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| 196 |
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| 197 | #endif
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