contrib/bind-9.5.2/lib/isc/include/isc/netaddr.h

   1 /*
   2  * Copyright (C) 2004-2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1998-2002  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or 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: netaddr.h,v 1.35.128.2 2009/01/19 23:47:03 tbox Exp $ */
  19
  20 #ifndef ISC_NETADDR_H
  21 #define ISC_NETADDR_H 1
  22
  23 /*! \file isc/netaddr.h */
  24
  25 #include <isc/lang.h>
  26 #include <isc/net.h>
  27 #include <isc/types.h>
  28
  29 #ifdef ISC_PLATFORM_HAVESYSUNH
  30 #include <sys/types.h>
  31 #include <sys/un.h>
  32 #endif
  33
  34 ISC_LANG_BEGINDECLS
  35
  36 struct isc_netaddr {
  37         unsigned int family;
  38         union {
  39                 struct in_addr in;
  40                 struct in6_addr in6;
  41 #ifdef ISC_PLATFORM_HAVESYSUNH
  42                 char un[sizeof(((struct sockaddr_un *)0)->sun_path)];
  43 #endif
  44         } type;
  45         isc_uint32_t zone;
  46 };
  47
  48 isc_boolean_t
  49 isc_netaddr_equal(const isc_netaddr_t *a, const isc_netaddr_t *b);
  50
  51 /*%<
  52  * Compare network addresses 'a' and 'b'.  Return #ISC_TRUE if
  53  * they are equal, #ISC_FALSE if not.
  54  */
  55
  56 isc_boolean_t
  57 isc_netaddr_eqprefix(const isc_netaddr_t *a, const isc_netaddr_t *b,
  58                      unsigned int prefixlen);
  59 /*%<
  60  * Compare the 'prefixlen' most significant bits of the network
  61  * addresses 'a' and 'b'.  If 'b''s scope is zero then 'a''s scope is
  62  * ignored.  Return #ISC_TRUE if they are equal, #ISC_FALSE if not.
  63  */
  64
  65 isc_result_t
  66 isc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp);
  67 /*%<
  68  * Convert a netmask in 's' into a prefix length in '*lenp'.
  69  * The mask should consist of zero or more '1' bits in the most
  70  * most significant part of the address, followed by '0' bits.
  71  * If this is not the case, #ISC_R_MASKNONCONTIG is returned.
  72  *
  73  * Returns:
  74  *\li   #ISC_R_SUCCESS
  75  *\li   #ISC_R_MASKNONCONTIG
  76  */
  77
  78 isc_result_t
  79 isc_netaddr_totext(const isc_netaddr_t *netaddr, isc_buffer_t *target);
  80 /*%<
  81  * Append a text representation of 'sockaddr' to the buffer 'target'.
  82  * The text is NOT null terminated.  Handles IPv4 and IPv6 addresses.
  83  *
  84  * Returns:
  85  *\li   #ISC_R_SUCCESS
  86  *\li   #ISC_R_NOSPACE  The text or the null termination did not fit.
  87  *\li   #ISC_R_FAILURE  Unspecified failure
  88  */
  89
  90 void
  91 isc_netaddr_format(const isc_netaddr_t *na, char *array, unsigned int size);
  92 /*%<
  93  * Format a human-readable representation of the network address '*na'
  94  * into the character array 'array', which is of size 'size'.
  95  * The resulting string is guaranteed to be null-terminated.
  96  */
  97
  98 #define ISC_NETADDR_FORMATSIZE \
  99         sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:XXX.XXX.XXX.XXX%SSSSSSSSSS")
 100 /*%<
 101  * Minimum size of array to pass to isc_netaddr_format().
 102  */
 103
 104 void
 105 isc_netaddr_fromsockaddr(isc_netaddr_t *netaddr, const isc_sockaddr_t *source);
 106
 107 void
 108 isc_netaddr_fromin(isc_netaddr_t *netaddr, const struct in_addr *ina);
 109
 110 void
 111 isc_netaddr_fromin6(isc_netaddr_t *netaddr, const struct in6_addr *ina6);
 112
 113 isc_result_t
 114 isc_netaddr_frompath(isc_netaddr_t *netaddr, const char *path);
 115
 116 void
 117 isc_netaddr_setzone(isc_netaddr_t *netaddr, isc_uint32_t zone);
 118
 119 isc_uint32_t
 120 isc_netaddr_getzone(const isc_netaddr_t *netaddr);
 121
 122 void
 123 isc_netaddr_any(isc_netaddr_t *netaddr);
 124 /*%<
 125  * Return the IPv4 wildcard address.
 126  */
 127
 128 void
 129 isc_netaddr_any6(isc_netaddr_t *netaddr);
 130 /*%<
 131  * Return the IPv6 wildcard address.
 132  */
 133
 134 isc_boolean_t
 135 isc_netaddr_ismulticast(isc_netaddr_t *na);
 136 /*%<
 137  * Returns ISC_TRUE if the address is a multicast address.
 138  */
 139
 140 isc_boolean_t
 141 isc_netaddr_isexperimental(isc_netaddr_t *na);
 142 /*%<
 143  * Returns ISC_TRUE if the address is a experimental (CLASS E) address.
 144  */
 145
 146 isc_boolean_t
 147 isc_netaddr_islinklocal(isc_netaddr_t *na);
 148 /*%<
 149  * Returns #ISC_TRUE if the address is a link local address.
 150  */
 151
 152 isc_boolean_t
 153 isc_netaddr_issitelocal(isc_netaddr_t *na);
 154 /*%<
 155  * Returns #ISC_TRUE if the address is a site local address.
 156  */
 157
 158 void
 159 isc_netaddr_fromv4mapped(isc_netaddr_t *t, const isc_netaddr_t *s);
 160 /*%<
 161  * Convert an IPv6 v4mapped address into an IPv4 address.
 162  */
 163
 164 isc_result_t
 165 isc_netaddr_prefixok(const isc_netaddr_t *na, unsigned int prefixlen);
 166 /*
 167  * Test whether the netaddr 'na' and 'prefixlen' are consistant.
 168  * e.g. prefixlen within range.
 169  *      na does not have bits set which are not covered by the prefixlen.
 170  *
 171  * Returns:
 172  *      ISC_R_SUCCESS
 173  *      ISC_R_RANGE             prefixlen out of range
 174  *      ISC_R_NOTIMPLEMENTED    unsupported family
 175  *      ISC_R_FAILURE           extra bits.
 176  */
 177
 178 ISC_LANG_ENDDECLS
 179
 180 #endif /* ISC_NETADDR_H */