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netaddr.h
/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef ISC_NETADDR_H #define ISC_NETADDR_H 1 /*! \file isc/netaddr.h */ #include <inttypes.h> #include <stdbool.h> #include <isc/lang.h> #include <isc/net.h> #include <isc/types.h> #ifdef ISC_PLATFORM_HAVESYSUNH #include <sys/types.h> #include <sys/un.h> #endif ISC_LANG_BEGINDECLS struct isc_netaddr { unsigned int family; union { struct in_addr in; struct in6_addr in6; #ifdef ISC_PLATFORM_HAVESYSUNH char un[sizeof(((struct sockaddr_un *)0)->sun_path)]; #endif } type; uint32_t zone; }; bool isc_netaddr_equal(const isc_netaddr_t *a, const isc_netaddr_t *b); /*%< * Compare network addresses 'a' and 'b'. Return #true if * they are equal, #false if not. */ bool isc_netaddr_eqprefix(const isc_netaddr_t *a, const isc_netaddr_t *b, unsigned int prefixlen); /*%< * Compare the 'prefixlen' most significant bits of the network * addresses 'a' and 'b'. If 'b''s scope is zero then 'a''s scope is * ignored. Return #true if they are equal, #false if not. */ isc_result_t isc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp); /*%< * Convert a netmask in 's' into a prefix length in '*lenp'. * The mask should consist of zero or more '1' bits in the * most significant part of the address, followed by '0' bits. * If this is not the case, #ISC_R_MASKNONCONTIG is returned. * * Returns: *\li #ISC_R_SUCCESS *\li #ISC_R_MASKNONCONTIG */ isc_result_t isc_netaddr_totext(const isc_netaddr_t *netaddr, isc_buffer_t *target); /*%< * Append a text representation of 'sockaddr' to the buffer 'target'. * The text is NOT null terminated. Handles IPv4 and IPv6 addresses. * * Returns: *\li #ISC_R_SUCCESS *\li #ISC_R_NOSPACE The text or the null termination did not fit. *\li #ISC_R_FAILURE Unspecified failure */ void isc_netaddr_format(const isc_netaddr_t *na, char *array, unsigned int size); /*%< * Format a human-readable representation of the network address '*na' * into the character array 'array', which is of size 'size'. * The resulting string is guaranteed to be null-terminated. */ #define ISC_NETADDR_FORMATSIZE \ sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:XXX.XXX.XXX.XXX%SSSSSSSSSS") /*%< * Minimum size of array to pass to isc_netaddr_format(). */ void isc_netaddr_fromsockaddr(isc_netaddr_t *netaddr, const isc_sockaddr_t *source); void isc_netaddr_fromin(isc_netaddr_t *netaddr, const struct in_addr *ina); void isc_netaddr_fromin6(isc_netaddr_t *netaddr, const struct in6_addr *ina6); isc_result_t isc_netaddr_frompath(isc_netaddr_t *netaddr, const char *path); void isc_netaddr_setzone(isc_netaddr_t *netaddr, uint32_t zone); uint32_t isc_netaddr_getzone(const isc_netaddr_t *netaddr); void isc_netaddr_any(isc_netaddr_t *netaddr); /*%< * Return the IPv4 wildcard address. */ void isc_netaddr_any6(isc_netaddr_t *netaddr); /*%< * Return the IPv6 wildcard address. */ bool isc_netaddr_ismulticast(isc_netaddr_t *na); /*%< * Returns true if the address is a multicast address. */ bool isc_netaddr_isexperimental(isc_netaddr_t *na); /*%< * Returns true if the address is a experimental (CLASS E) address. */ bool isc_netaddr_islinklocal(isc_netaddr_t *na); /*%< * Returns #true if the address is a link local address. */ bool isc_netaddr_issitelocal(isc_netaddr_t *na); /*%< * Returns #true if the address is a site local address. */ bool isc_netaddr_isnetzero(isc_netaddr_t *na); /*%< * Returns #true if the address is in net zero. */ void isc_netaddr_fromv4mapped(isc_netaddr_t *t, const isc_netaddr_t *s); /*%< * Convert an IPv6 v4mapped address into an IPv4 address. */ isc_result_t isc_netaddr_prefixok(const isc_netaddr_t *na, unsigned int prefixlen); /* * Test whether the netaddr 'na' and 'prefixlen' are consistent. * e.g. prefixlen within range. * na does not have bits set which are not covered by the prefixlen. * * Returns: * ISC_R_SUCCESS * ISC_R_RANGE prefixlen out of range * ISC_R_NOTIMPLEMENTED unsupported family * ISC_R_FAILURE extra bits. */ bool isc_netaddr_isloopback(const isc_netaddr_t *na); /* * Test whether the netaddr 'na' is a loopback IPv4 or IPv6 address (in * 127.0.0.0/8 or ::1). */ ISC_LANG_ENDDECLS #endif /* ISC_NETADDR_H */
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