usr/src/uts/common/netinet/ip.h

   1 /*
   2  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*
   7  * Copyright (c) 1982, 1986 Regents of the University of California.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms are permitted
  11  * provided that this notice is preserved and that due credit is given
  12  * to the University of California at Berkeley. The name of the University
  13  * may not be used to endorse or promote products derived from this
  14  * software without specific prior written permission. This software
  15  * is provided ``as is'' without express or implied warranty.
  16  */
  17
  18 /*
  19  * Definitions for internet protocol version 4.
  20  * Per RFC 791, September 1981.
  21  */
  22
  23 #ifndef _NETINET_IP_H
  24 #define _NETINET_IP_H
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27 /* ip.h 1.13 88/08/19 SMI; from UCB 7.6.1.1 3/15/88     */
  28
  29 #include <sys/isa_defs.h>
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #define IPVERSION       4
  36
  37 /*
  38  * Structure of an internet header, naked of options.
  39  */
  40 struct ip {
  41 #ifdef _BIT_FIELDS_LTOH
  42         uchar_t ip_hl:4,                /* header length */
  43                 ip_v:4;                 /* version */
  44 #else
  45         uchar_t ip_v:4,                 /* version */
  46                 ip_hl:4;                /* header length */
  47 #endif
  48         uchar_t ip_tos;                 /* type of service */
  49         ushort_t ip_len;                /* total length */
  50         ushort_t ip_id;                 /* identification */
  51         ushort_t ip_off;                /* fragment offset field */
  52 #define IP_DF 0x4000                    /* dont fragment flag */
  53 #define IP_MF 0x2000                    /* more fragments flag */
  54         uchar_t ip_ttl;                 /* time to live */
  55         uchar_t ip_p;                   /* protocol */
  56         ushort_t ip_sum;                /* checksum */
  57         struct  in_addr ip_src, ip_dst; /* source and dest address */
  58 };
  59
  60 #define IP_MAXPACKET    65535           /* maximum packet size */
  61
  62 /*
  63  * Definitions for IP type of service (ip_tos)
  64  */
  65 #define IPTOS_LOWDELAY          0x10
  66 #define IPTOS_THROUGHPUT        0x08
  67 #define IPTOS_RELIABILITY       0x04
  68 #define IPTOS_ECT               0x02    /* ECN-Capable Transport flag */
  69 #define IPTOS_CE                0x01    /* ECN-Congestion Experienced flag */
  70
  71 /*
  72  * Definitions for IP precedence (also in ip_tos) (hopefully unused)
  73  */
  74 #define IPTOS_PREC_NETCONTROL           0xe0
  75 #define IPTOS_PREC_INTERNETCONTROL      0xc0
  76 #define IPTOS_PREC_CRITIC_ECP           0xa0
  77 #define IPTOS_PREC_FLASHOVERRIDE        0x80
  78 #define IPTOS_PREC_FLASH                0x60
  79 #define IPTOS_PREC_IMMEDIATE            0x40
  80 #define IPTOS_PREC_PRIORITY             0x20
  81 #define IPTOS_PREC_ROUTINE              0x00
  82
  83 /*
  84  * Definitions for options.
  85  */
  86
  87 /* Bits in the option value */
  88 #define IPOPT_COPY              0x80
  89
  90 #define IPOPT_COPIED(o)         ((o)&0x80)
  91 #define IPOPT_CLASS(o)          ((o)&0x60)
  92 #define IPOPT_NUMBER(o)         ((o)&0x1f)
  93
  94 #define IPOPT_CONTROL           0x00
  95 #define IPOPT_RESERVED1         0x20
  96 #define IPOPT_DEBMEAS           0x40
  97 #define IPOPT_RESERVED2         0x60
  98
  99 #define IPOPT_EOL               0x00            /* end of option list */
 100 #define IPOPT_NOP               0x01            /* no operation */
 101
 102 #define IPOPT_RR                0x07            /* record packet route */
 103 #define IPOPT_RTRALERT          0x14            /* router alert */
 104 #define IPOPT_TS                0x44            /* timestamp */
 105 #define IPOPT_SECURITY          0x82            /* provide s,c,h,tcc */
 106 #define IPOPT_LSRR              0x83            /* loose source route */
 107 #define IPOPT_EXTSEC            0x85
 108 #define IPOPT_COMSEC            0x86
 109 #define IPOPT_SATID             0x88            /* satnet id */
 110 #define IPOPT_SSRR              0x89            /* strict source route */
 111 #define IPOPT_RA                0x94
 112 #define IPOPT_SDMDD             0x95
 113
 114 /*
 115  * Offsets to fields in options other than EOL and NOP.
 116  */
 117 #define IPOPT_OPTVAL            0               /* option ID */
 118 #define IPOPT_OLEN              1               /* option length */
 119 #define IPOPT_OFFSET            2               /* offset within option */
 120 #define IPOPT_POS_OV_FLG        3
 121 #define IPOPT_MINOFF            4               /* min value of IPOPT_OFFSET */
 122
 123
 124 /* Minimum for src and record route options */
 125 #define IPOPT_MINOFF_SR         IPOPT_MINOFF
 126
 127 /*
 128  * Time stamp option structure.
 129  */
 130 struct  ip_timestamp {
 131         uchar_t ipt_code;               /* IPOPT_TS */
 132         uchar_t ipt_len;                /* size of structure (variable) */
 133         uchar_t ipt_ptr;                /* index of current entry */
 134 #ifdef _BIT_FIELDS_LTOH
 135         uchar_t ipt_flg:4,              /* flags, see below */
 136                 ipt_oflw:4;             /* overflow counter */
 137 #else
 138         uchar_t ipt_oflw:4,             /* overflow counter */
 139                 ipt_flg:4;              /* flags, see below */
 140 #endif
 141         union ipt_timestamp {
 142                 uint32_t        ipt_time[1];
 143                 struct  ipt_ta {
 144                         struct in_addr  ipt_addr;
 145                         uint32_t        ipt_time;
 146                 } ipt_ta[1];
 147         } ipt_timestamp;
 148 };
 149
 150 /* flag bits for ipt_flg */
 151 #define IPOPT_TS_TSONLY         0               /* timestamps only */
 152 #define IPOPT_TS_TSANDADDR      1               /* timestamps and addresses */
 153 #define IPOPT_TS_PRESPEC        2               /* specified modules only */
 154 #define IPOPT_TS_PRESPEC_RFC791 3
 155
 156 /* Minimum for timestamp option */
 157 #define IPOPT_MINOFF_IT         5
 158 #define IPOPT_MINLEN_IT         5
 159
 160 #define IPOPT_TS_TIMELEN        4       /* Timestamp size */
 161
 162 /* bits for security (not byte swapped) */
 163 #define IPOPT_SECUR_UNCLASS     0x0000
 164 #define IPOPT_SECUR_CONFID      0xf135
 165 #define IPOPT_SECUR_EFTO        0x789a
 166 #define IPOPT_SECUR_MMMM        0xbc4d
 167 #define IPOPT_SECUR_RESTR       0xaf13
 168 #define IPOPT_SECUR_SECRET      0xd788
 169 #define IPOPT_SECUR_TOPSECRET   0x6bc5
 170
 171 /*
 172  * Internet implementation parameters.
 173  */
 174 #define MAXTTL          255             /* maximum time to live (seconds) */
 175 #define IPFRAGTTL       60              /* time to live for frags, slowhz */
 176 #define IPTTLDEC        1               /* subtracted when forwarding */
 177
 178 #define IP_MSS          576             /* default maximum segment size */
 179
 180 #ifdef  __cplusplus
 181 }
 182 #endif
 183
 184 #endif  /* _NETINET_IP_H */