dlls/icmp/ip.h

   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  * $FreeBSD: src/sys/netinet/ip.h,v 1.16 1999/08/28 00:49:19 peter Exp $
  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 struct ip {
  50 #ifdef _IP_VHL
  51         u_char  ip_vhl;                 /* version << 4 | header length >> 2 */
  52 #else
  53 #if BYTE_ORDER == LITTLE_ENDIAN
  54         u_int   ip_hl:4,                /* header length */
  55                 ip_v:4;                 /* version */
  56 #endif
  57 #if BYTE_ORDER == BIG_ENDIAN
  58         u_int   ip_v:4,                 /* version */
  59                 ip_hl:4;                /* header length */
  60 #endif
  61 #endif /* not _IP_VHL */
  62         u_char  ip_tos;                 /* type of service */
  63         u_short ip_len;                 /* total length */
  64         u_short ip_id;                  /* identification */
  65         u_short ip_off;                 /* fragment offset field */
  66 #define IP_RF 0x8000                    /* reserved fragment flag */
  67 #define IP_DF 0x4000                    /* dont fragment flag */
  68 #define IP_MF 0x2000                    /* more fragments flag */
  69 #define IP_OFFMASK 0x1fff               /* mask for fragmenting bits */
  70         u_char  ip_ttl;                 /* time to live */
  71         u_char  ip_p;                   /* protocol */
  72         u_short ip_sum;                 /* checksum */
  73         struct  in_addr ip_src,ip_dst;  /* source and dest address */
  74 };
  75
  76 #ifdef _IP_VHL
  77 #define IP_MAKE_VHL(v, hl)      ((v) << 4 | (hl))
  78 #define IP_VHL_HL(vhl)          ((vhl) & 0x0f)
  79 #define IP_VHL_V(vhl)           ((vhl) >> 4)
  80 #define IP_VHL_BORING           0x45
  81 #endif
  82
  83 #define IP_MAXPACKET    65535           /* maximum packet size */
  84
  85 /*
  86  * Definitions for IP type of service (ip_tos)
  87  */
  88 #define IPTOS_LOWDELAY          0x10
  89 #define IPTOS_THROUGHPUT        0x08
  90 #define IPTOS_RELIABILITY       0x04
  91 #define IPTOS_MINCOST           0x02
  92
  93 /*
  94  * Definitions for IP precedence (also in ip_tos) (hopefully unused)
  95  */
  96 #define IPTOS_PREC_NETCONTROL           0xe0
  97 #define IPTOS_PREC_INTERNETCONTROL      0xc0
  98 #define IPTOS_PREC_CRITIC_ECP           0xa0
  99 #define IPTOS_PREC_FLASHOVERRIDE        0x80
 100 #define IPTOS_PREC_FLASH                0x60
 101 #define IPTOS_PREC_IMMEDIATE            0x40
 102 #define IPTOS_PREC_PRIORITY             0x20
 103 #define IPTOS_PREC_ROUTINE              0x00
 104
 105 /*
 106  * Definitions for options.
 107  */
 108 #define IPOPT_COPIED(o)         ((o)&0x80)
 109 #define IPOPT_CLASS(o)          ((o)&0x60)
 110 #define IPOPT_NUMBER(o)         ((o)&0x1f)
 111
 112 #define IPOPT_CONTROL           0x00
 113 #define IPOPT_RESERVED1         0x20
 114 #define IPOPT_DEBMEAS           0x40
 115 #define IPOPT_RESERVED2         0x60
 116
 117 #define IPOPT_EOL               0               /* end of option list */
 118 #define IPOPT_NOP               1               /* no operation */
 119
 120 #define IPOPT_RR                7               /* record packet route */
 121 #define IPOPT_TS                68              /* timestamp */
 122 #define IPOPT_SECURITY          130             /* provide s,c,h,tcc */
 123 #define IPOPT_LSRR              131             /* loose source route */
 124 #define IPOPT_SATID             136             /* satnet id */
 125 #define IPOPT_SSRR              137             /* strict source route */
 126 #define IPOPT_RA                148             /* router alert */
 127
 128 /*
 129  * Offsets to fields in options other than EOL and NOP.
 130  */
 131 #define IPOPT_OPTVAL            0               /* option ID */
 132 #define IPOPT_OLEN              1               /* option length */
 133 #define IPOPT_OFFSET            2               /* offset within option */
 134 #define IPOPT_MINOFF            4               /* min value of above */
 135
 136 /*
 137  * Time stamp option structure.
 138  */
 139 struct  ip_timestamp {
 140         u_char  ipt_code;               /* IPOPT_TS */
 141         u_char  ipt_len;                /* size of structure (variable) */
 142         u_char  ipt_ptr;                /* index of current entry */
 143 #if BYTE_ORDER == LITTLE_ENDIAN
 144         u_int   ipt_flg:4,              /* flags, see below */
 145                 ipt_oflw:4;             /* overflow counter */
 146 #endif
 147 #if BYTE_ORDER == BIG_ENDIAN
 148         u_int   ipt_oflw:4,             /* overflow counter */
 149                 ipt_flg:4;              /* flags, see below */
 150 #endif
 151         union ipt_timestamp {
 152                 n_long  ipt_time[1];
 153                 struct  ipt_ta {
 154                         struct in_addr ipt_addr;
 155                         n_long ipt_time;
 156                 } ipt_ta[1];
 157         } ipt_timestamp;
 158 };
 159
 160 /* flag bits for ipt_flg */
 161 #define IPOPT_TS_TSONLY         0               /* timestamps only */
 162 #define IPOPT_TS_TSANDADDR      1               /* timestamps and addresses */
 163 #define IPOPT_TS_PRESPEC        3               /* specified modules only */
 164
 165 /* bits for security (not byte swapped) */
 166 #define IPOPT_SECUR_UNCLASS     0x0000
 167 #define IPOPT_SECUR_CONFID      0xf135
 168 #define IPOPT_SECUR_EFTO        0x789a
 169 #define IPOPT_SECUR_MMMM        0xbc4d
 170 #define IPOPT_SECUR_RESTR       0xaf13
 171 #define IPOPT_SECUR_SECRET      0xd788
 172 #define IPOPT_SECUR_TOPSECRET   0x6bc5
 173
 174 /*
 175  * Internet implementation parameters.
 176  */
 177 #define MAXTTL          255             /* maximum time to live (seconds) */
 178 #define IPDEFTTL        64              /* default ttl, from RFC 1340 */
 179 #define IPFRAGTTL       60              /* time to live for frags, slowhz */
 180 #define IPTTLDEC        1               /* subtracted when forwarding */
 181
 182 #define IP_MSS          576             /* default maximum segment size */
 183
 184 #endif