1 /* $NetBSD: ipv6.h,v 1.4 2014/12/10 04:38:00 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 1999-2002 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or 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 1.24 2007/06/19 23:47:18 tbox 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 /*! \file isc/ipv6.h 36 * \brief IPv6 definitions for systems which do not support IPv6. 37 * 38 * \li MP: 39 * No impact. 40 * 41 * \li Reliability: 42 * No anticipated impact. 43 * 44 * \li Resources: 45 * N/A. 46 * 47 * \li Security: 48 * No anticipated impact. 49 * 50 * \li Standards: 51 * RFC2553. 52 */ 53 54 /*** 55 *** Imports. 56 ***/ 57 58 #include <isc/int.h> 59 #include <isc/platform.h> 60 61 /*** 62 *** Types. 63 ***/ 64 65 struct in6_addr { 66 union { 67 isc_uint8_t _S6_u8[16]; 68 isc_uint16_t _S6_u16[8]; 69 isc_uint32_t _S6_u32[4]; 70 } _S6_un; 71 }; 72 #define s6_addr _S6_un._S6_u8 73 #define s6_addr8 _S6_un._S6_u8 74 #define s6_addr16 _S6_un._S6_u16 75 #define s6_addr32 _S6_un._S6_u32 76 77 #define IN6ADDR_ANY_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}} 78 #define IN6ADDR_LOOPBACK_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}} 79 80 LIBISC_EXTERNAL_DATA extern const struct in6_addr in6addr_any; 81 LIBISC_EXTERNAL_DATA extern const struct in6_addr in6addr_loopback; 82 83 struct sockaddr_in6 { 84 #ifdef ISC_PLATFORM_HAVESALEN 85 isc_uint8_t sin6_len; 86 isc_uint8_t sin6_family; 87 #else 88 isc_uint16_t sin6_family; 89 #endif 90 isc_uint16_t sin6_port; 91 isc_uint32_t sin6_flowinfo; 92 struct in6_addr sin6_addr; 93 isc_uint32_t sin6_scope_id; 94 }; 95 96 #ifdef ISC_PLATFORM_HAVESALEN 97 #define SIN6_LEN 1 98 #endif 99 100 /*% 101 * Unspecified 102 */ 103 #define IN6_IS_ADDR_UNSPECIFIED(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)) 108 109 /*% 110 * Loopback 111 */ 112 #define IN6_IS_ADDR_LOOPBACK(a) \ 113 (((a)->s6_addr32[0] == 0) && \ 114 ((a)->s6_addr32[1] == 0) && \ 115 ((a)->s6_addr32[2] == 0) && \ 116 ((a)->s6_addr32[3] == htonl(1))) 117 118 /*% 119 * IPv4 compatible 120 */ 121 #define IN6_IS_ADDR_V4COMPAT(a) \ 122 (((a)->s6_addr32[0] == 0) && \ 123 ((a)->s6_addr32[1] == 0) && \ 124 ((a)->s6_addr32[2] == 0) && \ 125 ((a)->s6_addr32[3] != 0) && \ 126 ((a)->s6_addr32[3] != htonl(1))) 127 128 /*% 129 * Mapped 130 */ 131 #define IN6_IS_ADDR_V4MAPPED(a) \ 132 (((a)->s6_addr32[0] == 0) && \ 133 ((a)->s6_addr32[1] == 0) && \ 134 ((a)->s6_addr32[2] == htonl(0x0000ffff))) 135 136 /*% 137 * Multicast 138 */ 139 #define IN6_IS_ADDR_MULTICAST(a) \ 140 ((a)->s6_addr8[0] == 0xffU) 141 142 /*% 143 * Unicast link / site local. 144 */ 145 #define IN6_IS_ADDR_LINKLOCAL(a) \ 146 (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80)) 147 #define IN6_IS_ADDR_SITELOCAL(a) \ 148 (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0)) 149 150 #endif /* ISC_IPV6_H */ 151