contrib/bind-9.2.4rc7/lib/isc/include/isc/ipv6.h

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: ipv6.h,v 1.17.2.1 2004/03/09 06:11:57 marka Exp $ */
  19
  20 #ifndef ISC_IPV6_H
  21 #define ISC_IPV6_H 1
  22
  23 /*
  24  * Also define LWRES_IPV6_H to keep it from being included if liblwres is
  25  * being used, or redefinition errors will occur.
  26  */
  27 #define LWRES_IPV6_H 1
  28
  29 /*****
  30  ***** Module Info
  31  *****/
  32
  33 /*
  34  * IPv6 definitions for systems which do not support IPv6.
  35  *
  36  * MP:
  37  *      No impact.
  38  *
  39  * Reliability:
  40  *      No anticipated impact.
  41  *
  42  * Resources:
  43  *      N/A.
  44  *
  45  * Security:
  46  *      No anticipated impact.
  47  *
  48  * Standards:
  49  *      RFC 2553.
  50  */
  51
  52 /***
  53  *** Imports.
  54  ***/
  55
  56 #include <isc/int.h>
  57 #include <isc/platform.h>
  58
  59 /***
  60  *** Types.
  61  ***/
  62
  63 struct in6_addr {
  64         union {
  65                 isc_uint8_t     _S6_u8[16];
  66                 isc_uint16_t    _S6_u16[8];
  67                 isc_uint32_t    _S6_u32[4];
  68         } _S6_un;
  69 };
  70 #define s6_addr         _S6_un._S6_u8
  71 #define s6_addr8        _S6_un._S6_u8
  72 #define s6_addr16       _S6_un._S6_u16
  73 #define s6_addr32       _S6_un._S6_u32
  74
  75 #define IN6ADDR_ANY_INIT        {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}}
  76 #define IN6ADDR_LOOPBACK_INIT   {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}}
  77
  78 extern const struct in6_addr in6addr_any;
  79 extern const struct in6_addr in6addr_loopback;
  80
  81 struct sockaddr_in6 {
  82 #ifdef ISC_PLATFORM_HAVESALEN
  83         isc_uint8_t             sin6_len;
  84         isc_uint8_t             sin6_family;
  85 #else
  86         isc_uint16_t            sin6_family;
  87 #endif
  88         isc_uint16_t            sin6_port;
  89         isc_uint32_t            sin6_flowinfo;
  90         struct in6_addr         sin6_addr;
  91         isc_uint32_t            sin6_scope_id;
  92 };
  93
  94 #ifdef ISC_PLATFORM_HAVESALEN
  95 #define SIN6_LEN 1
  96 #endif
  97
  98 /*
  99  * Unspecified
 100  */
 101 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
 102         (((a)->s6_addr32[0] == 0) &&    \
 103          ((a)->s6_addr32[1] == 0) &&    \
 104          ((a)->s6_addr32[2] == 0) &&    \
 105          ((a)->s6_addr32[3] == 0))
 106
 107 /*
 108  * Loopback
 109  */
 110 #define IN6_IS_ADDR_LOOPBACK(a)         \
 111         (((a)->s6_addr32[0] == 0) &&    \
 112          ((a)->s6_addr32[1] == 0) &&    \
 113          ((a)->s6_addr32[2] == 0) &&    \
 114          ((a)->s6_addr32[3] == htonl(1)))
 115
 116 /*
 117  * IPv4 compatible
 118  */
 119 #define IN6_IS_ADDR_V4COMPAT(a)         \
 120         (((a)->s6_addr32[0] == 0) &&    \
 121          ((a)->s6_addr32[1] == 0) &&    \
 122          ((a)->s6_addr32[2] == 0) &&    \
 123          ((a)->s6_addr32[3] != 0) &&    \
 124          ((a)->s6_addr32[3] != htonl(1)))
 125
 126 /*
 127  * Mapped
 128  */
 129 #define IN6_IS_ADDR_V4MAPPED(a)               \
 130         (((a)->s6_addr32[0] == 0) &&          \
 131          ((a)->s6_addr32[1] == 0) &&          \
 132          ((a)->s6_addr32[2] == htonl(0x0000ffff)))
 133
 134 /*
 135  * Multicast
 136  */
 137 #define IN6_IS_ADDR_MULTICAST(a)        \
 138         ((a)->s6_addr8[0] == 0xffU)
 139
 140 #endif /* ISC_IPV6_H */