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

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2000, 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 1.9.2.1 2004/03/09 06:12:36 marka Exp $ */
  19
  20 #ifndef LWRES_IPV6_H
  21 #define LWRES_IPV6_H 1
  22
  23 /*****
  24  ***** Module Info
  25  *****/
  26
  27 /*
  28  * IPv6 definitions for systems which do not support IPv6.
  29  */
  30
  31 /***
  32  *** Imports.
  33  ***/
  34
  35 #include <lwres/int.h>
  36 #include <lwres/platform.h>
  37
  38 /***
  39  *** Types.
  40  ***/
  41
  42 struct in6_addr {
  43         union {
  44                 lwres_uint8_t   _S6_u8[16];
  45                 lwres_uint16_t  _S6_u16[8];
  46                 lwres_uint32_t  _S6_u32[4];
  47         } _S6_un;
  48 };
  49 #define s6_addr         _S6_un._S6_u8
  50 #define s6_addr8        _S6_un._S6_u8
  51 #define s6_addr16       _S6_un._S6_u16
  52 #define s6_addr32       _S6_un._S6_u32
  53
  54 #define IN6ADDR_ANY_INIT        {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}}
  55 #define IN6ADDR_LOOPBACK_INIT   {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}}
  56
  57 LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_any;
  58 LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_loopback;
  59
  60 struct sockaddr_in6 {
  61 #ifdef LWRES_PLATFORM_HAVESALEN
  62         lwres_uint8_t           sin6_len;
  63         lwres_uint8_t           sin6_family;
  64 #else
  65         lwres_uint16_t          sin6_family;
  66 #endif
  67         lwres_uint16_t          sin6_port;
  68         lwres_uint32_t          sin6_flowinfo;
  69         struct in6_addr         sin6_addr;
  70         lwres_uint32_t          sin6_scope_id;
  71 };
  72
  73 #ifdef LWRES_PLATFORM_HAVESALEN
  74 #define SIN6_LEN 1
  75 #endif
  76
  77 struct in6_pktinfo {
  78         struct in6_addr ipi6_addr;    /* src/dst IPv6 address */
  79         unsigned int    ipi6_ifindex; /* send/recv interface index */
  80 };
  81
  82 /*
  83  * Unspecified
  84  */
  85 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
  86         (((a)->s6_addr32[0] == 0) &&    \
  87          ((a)->s6_addr32[1] == 0) &&    \
  88          ((a)->s6_addr32[2] == 0) &&    \
  89          ((a)->s6_addr32[3] == 0))
  90
  91 /*
  92  * Loopback
  93  */
  94 #define IN6_IS_ADDR_LOOPBACK(a)         \
  95         (((a)->s6_addr32[0] == 0) &&    \
  96          ((a)->s6_addr32[1] == 0) &&    \
  97          ((a)->s6_addr32[2] == 0) &&    \
  98          ((a)->s6_addr32[3] == htonl(1)))
  99
 100 /*
 101  * IPv4 compatible
 102  */
 103 #define IN6_IS_ADDR_V4COMPAT(a)         \
 104         (((a)->s6_addr32[0] == 0) &&    \
 105          ((a)->s6_addr32[1] == 0) &&    \
 106          ((a)->s6_addr32[2] == 0) &&    \
 107          ((a)->s6_addr32[3] != 0) &&    \
 108          ((a)->s6_addr32[3] != htonl(1)))
 109
 110 /*
 111  * Mapped
 112  */
 113 #define IN6_IS_ADDR_V4MAPPED(a)               \
 114         (((a)->s6_addr32[0] == 0) &&          \
 115          ((a)->s6_addr32[1] == 0) &&          \
 116          ((a)->s6_addr32[2] == htonl(0x0000ffff)))
 117
 118 #endif /* LWRES_IPV6_H */