dist/ntp/include/isc/ipv6.h

   1 /*      $NetBSD: ipv6.h,v 1.2 2003/12/04 16:23:36 drochner Exp $        */
   2
   3 /*
   4  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 1999-2002  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: ipv6.h,v 1.17.12.4 2004/03/09 05:21:09 marka Exp */
  21
  22 #ifndef ISC_IPV6_H
  23 #define ISC_IPV6_H 1
  24
  25 /*
  26  * Also define LWRES_IPV6_H to keep it from being included if liblwres is
  27  * being used, or redefinition errors will occur.
  28  */
  29 #define LWRES_IPV6_H 1
  30
  31 /*****
  32  ***** Module Info
  33  *****/
  34
  35 /*
  36  * IPv6 definitions for systems which do not support IPv6.
  37  *
  38  * MP:
  39  *      No impact.
  40  *
  41  * Reliability:
  42  *      No anticipated impact.
  43  *
  44  * Resources:
  45  *      N/A.
  46  *
  47  * Security:
  48  *      No anticipated impact.
  49  *
  50  * Standards:
  51  *      RFC 2553.
  52  */
  53
  54 /***
  55  *** Imports.
  56  ***/
  57
  58 #include <isc/int.h>
  59 #include <isc/platform.h>
  60
  61 /*
  62  * We probably don't need this on NTP
  63  */
  64 #ifdef ISC_ONLY_IPV6
  65 /***
  66  *** Types.
  67  ***/
  68
  69 struct in6_addr {
  70         union {
  71                 isc_uint8_t     _S6_u8[16];
  72                 isc_uint16_t    _S6_u16[8];
  73                 isc_uint32_t    _S6_u32[4];
  74         } _S6_un;
  75 };
  76 #define s6_addr         _S6_un._S6_u8
  77 #define s6_addr8        _S6_un._S6_u8
  78 #define s6_addr16       _S6_un._S6_u16
  79 #define s6_addr32       _S6_un._S6_u32
  80
  81 #define IN6ADDR_ANY_INIT        {{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}
  82 #define IN6ADDR_LOOPBACK_INIT   {{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}
  83
  84 LIBISC_EXTERNAL_DATA extern const struct in6_addr in6addr_any;
  85 LIBISC_EXTERNAL_DATA extern const struct in6_addr in6addr_loopback;
  86
  87 struct sockaddr_in6 {
  88 #ifdef ISC_PLATFORM_HAVESALEN
  89         isc_uint8_t             sin6_len;
  90         isc_uint8_t             sin6_family;
  91 #else
  92         isc_uint16_t            sin6_family;
  93 #endif
  94         isc_uint16_t            sin6_port;
  95         isc_uint32_t            sin6_flowinfo;
  96         struct in6_addr         sin6_addr;
  97         isc_uint32_t            sin6_scope_id;
  98 };
  99
 100 #ifdef ISC_PLATFORM_HAVESALEN
 101 #define SIN6_LEN 1
 102 #endif
 103
 104 /*
 105  * Unspecified
 106  */
 107 #ifndef IN6_IS_ADDR_UNSPECIFIED
 108 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
 109         (((a)->s6_addr32[0] == 0) &&    \
 110          ((a)->s6_addr32[1] == 0) &&    \
 111          ((a)->s6_addr32[2] == 0) &&    \
 112          ((a)->s6_addr32[3] == 0))
 113 #endif
 114 /*
 115  * Loopback
 116  */
 117 #define IN6_IS_ADDR_LOOPBACK(a)         \
 118         (((a)->s6_addr32[0] == 0) &&    \
 119          ((a)->s6_addr32[1] == 0) &&    \
 120          ((a)->s6_addr32[2] == 0) &&    \
 121          ((a)->s6_addr32[3] == htonl(1)))
 122
 123 /*
 124  * IPv4 compatible
 125  */
 126 #define IN6_IS_ADDR_V4COMPAT(a)         \
 127         (((a)->s6_addr32[0] == 0) &&    \
 128          ((a)->s6_addr32[1] == 0) &&    \
 129          ((a)->s6_addr32[2] == 0) &&    \
 130          ((a)->s6_addr32[3] != 0) &&    \
 131          ((a)->s6_addr32[3] != htonl(1)))
 132
 133 /*
 134  * Mapped
 135  */
 136 #define IN6_IS_ADDR_V4MAPPED(a)               \
 137         (((a)->s6_addr32[0] == 0) &&          \
 138          ((a)->s6_addr32[1] == 0) &&          \
 139          ((a)->s6_addr32[2] == htonl(0x0000ffff)))
 140
 141 /*
 142  * Multicast
 143  */
 144 #ifndef IN6_IS_ADDR_MULTICAST
 145 #define IN6_IS_ADDR_MULTICAST(a)        \
 146         ((a)->s6_addr8[0] == 0xffU)
 147 #endif
 148 /*
 149  * Unicast link / site local.
 150  */
 151 #define IN6_IS_ADDR_LINKLOCAL(a)        \
 152         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
 153 #define IN6_IS_ADDR_SITELOCAL(a)        \
 154         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
 155
 156 #endif /* ISC_ONLY_IPV6 */
 157 #endif /* ISC_IPV6_H */