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 #include <sys/isa_defs.h>
  27
  28 #ifdef  __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 #define IPVERSION       4
  33
  34 /*
  35  * Structure of an internet header, naked of options.
  36  */
  37 struct ip {
  38 #ifdef _BIT_FIELDS_LTOH
  39         uchar_t ip_hl:4,                /* header length */
  40                 ip_v:4;                 /* version */
  41 #else
  42         uchar_t ip_v:4,                 /* version */
  43                 ip_hl:4;                /* header length */
  44 #endif
  45         uchar_t ip_tos;                 /* type of service */
  46         ushort_t ip_len;                /* total length */
  47         ushort_t ip_id;                 /* identification */
  48         ushort_t ip_off;                /* fragment offset field */
  49 #define IP_DF 0x4000                    /* dont fragment flag */
  50 #define IP_MF 0x2000                    /* more fragments flag */
  51         uchar_t ip_ttl;                 /* time to live */
  52         uchar_t ip_p;                   /* protocol */
  53         ushort_t ip_sum;                /* checksum */
  54         struct  in_addr ip_src, ip_dst; /* source and dest address */
  55 };
  56
  57 #define IP_MAXPACKET    65535           /* maximum packet size */
  58
  59 /*
  60  * Definitions for IP type of service (ip_tos)
  61  */
  62 #define IPTOS_LOWDELAY          0x10
  63 #define IPTOS_THROUGHPUT        0x08
  64 #define IPTOS_RELIABILITY       0x04
  65 #define IPTOS_ECT               0x02    /* ECN-Capable Transport flag */
  66 #define IPTOS_CE                0x01    /* ECN-Congestion Experienced flag */
  67
  68 /*
  69  * Definitions for IP precedence (also in ip_tos) (hopefully unused)
  70  */
  71 #define IPTOS_PREC_NETCONTROL           0xe0
  72 #define IPTOS_PREC_INTERNETCONTROL      0xc0
  73 #define IPTOS_PREC_CRITIC_ECP           0xa0
  74 #define IPTOS_PREC_FLASHOVERRIDE        0x80
  75 #define IPTOS_PREC_FLASH                0x60
  76 #define IPTOS_PREC_IMMEDIATE            0x40
  77 #define IPTOS_PREC_PRIORITY             0x20
  78 #define IPTOS_PREC_ROUTINE              0x00
  79
  80 /*
  81  * Definitions for options.
  82  */
  83
  84 /* Bits in the option value */
  85 #define IPOPT_COPY              0x80
  86
  87 #define IPOPT_COPIED(o)         ((o)&0x80)
  88 #define IPOPT_CLASS(o)          ((o)&0x60)
  89 #define IPOPT_NUMBER(o)         ((o)&0x1f)
  90
  91 #define IPOPT_CONTROL           0x00
  92 #define IPOPT_RESERVED1         0x20
  93 #define IPOPT_DEBMEAS           0x40
  94 #define IPOPT_RESERVED2         0x60
  95
  96 #define IPOPT_EOL               0x00            /* end of option list */
  97 #define IPOPT_NOP               0x01            /* no operation */
  98
  99 #define IPOPT_RR                0x07            /* record packet route */
 100 #define IPOPT_RTRALERT          0x14            /* router alert */
 101 #define IPOPT_TS                0x44            /* timestamp */
 102 #define IPOPT_SECURITY          0x82            /* provide s,c,h,tcc */
 103 #define IPOPT_LSRR              0x83            /* loose source route */
 104 #define IPOPT_SATID             0x88            /* satnet id */
 105 #define IPOPT_SSRR              0x89            /* strict source route */
 106 #define IPOPT_RA                0x94
 107 #define IPOPT_SDMDD             0x95
 108
 109 /*
 110  * Offsets to fields in options other than EOL and NOP.
 111  */
 112 #define IPOPT_OPTVAL            0               /* option ID */
 113 #define IPOPT_OLEN              1               /* option length */
 114 #define IPOPT_OFFSET            2               /* offset within option */
 115 #define IPOPT_POS_OV_FLG        3
 116 #define IPOPT_MINOFF            4               /* min value of IPOPT_OFFSET */
 117
 118
 119 /* Minimum for src and record route options */
 120 #define IPOPT_MINOFF_SR         IPOPT_MINOFF
 121
 122 /*
 123  * Time stamp option structure.
 124  */
 125 struct  ip_timestamp {
 126         uchar_t ipt_code;               /* IPOPT_TS */
 127         uchar_t ipt_len;                /* size of structure (variable) */
 128         uchar_t ipt_ptr;                /* index of current entry */
 129 #ifdef _BIT_FIELDS_LTOH
 130         uchar_t ipt_flg:4,              /* flags, see below */
 131                 ipt_oflw:4;             /* overflow counter */
 132 #else
 133         uchar_t ipt_oflw:4,             /* overflow counter */
 134                 ipt_flg:4;              /* flags, see below */
 135 #endif
 136         union ipt_timestamp {
 137                 uint32_t        ipt_time[1];
 138                 struct  ipt_ta {
 139                         struct in_addr  ipt_addr;
 140                         uint32_t        ipt_time;
 141                 } ipt_ta[1];
 142         } ipt_timestamp;
 143 };
 144
 145 /* flag bits for ipt_flg */
 146 #define IPOPT_TS_TSONLY         0               /* timestamps only */
 147 #define IPOPT_TS_TSANDADDR      1               /* timestamps and addresses */
 148 #define IPOPT_TS_PRESPEC        2               /* specified modules only */
 149 #define IPOPT_TS_PRESPEC_RFC791 3
 150
 151 /* Minimum for timestamp option */
 152 #define IPOPT_MINOFF_IT         5
 153 #define IPOPT_MINLEN_IT         5
 154
 155 #define IPOPT_TS_TIMELEN        4       /* Timestamp size */
 156
 157 /* bits for security (not byte swapped) */
 158 #define IPOPT_SECUR_UNCLASS     0x0000
 159 #define IPOPT_SECUR_CONFID      0xf135
 160 #define IPOPT_SECUR_EFTO        0x789a
 161 #define IPOPT_SECUR_MMMM        0xbc4d
 162 #define IPOPT_SECUR_RESTR       0xaf13
 163 #define IPOPT_SECUR_SECRET      0xd788
 164 #define IPOPT_SECUR_TOPSECRET   0x6bc5
 165
 166 /*
 167  * Internet implementation parameters.
 168  */
 169 #define MAXTTL          255             /* maximum time to live (seconds) */
 170 #define IPFRAGTTL       60              /* time to live for frags, slowhz */
 171 #define IPTTLDEC        1               /* subtracted when forwarding */
 172
 173 #define IP_MSS          576             /* default maximum segment size */
 174
 175 #ifdef  __cplusplus
 176 }
 177 #endif
 178
 179 #endif  /* _NETINET_IP_H */