StdLib/Include/netinet/ip.h

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