/*

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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")

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*

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* This Source Code Form is subject to the terms of the Mozilla Public

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* License, v. 2.0. If a copy of the MPL was not distributed with this

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* file, you can obtain one at https://mozilla.org/MPL/2.0/.

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*

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* See the COPYRIGHT file distributed with this work for additional

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* information regarding copyright ownership.

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*/

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#ifndef ISC_NET_H

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#define ISC_NET_H 1

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/*****

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***** Module Info

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*****/

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/*! \file

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* \brief

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* Basic Networking Types

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*

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* This module is responsible for defining the following basic networking

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* types:

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*

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*\li struct in_addr

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*\li struct in6_addr

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*\li struct in6_pktinfo

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*\li struct sockaddr

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*\li struct sockaddr_in

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*\li struct sockaddr_in6

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*\li struct sockaddr_storage

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*\li in_port_t

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*

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* It ensures that the AF_ and PF_ macros are defined.

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*

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* It declares ntoh[sl]() and hton[sl]().

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*

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* It declares inet_aton(), inet_ntop(), and inet_pton().

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*

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* It ensures that #INADDR_LOOPBACK, #INADDR_ANY, #IN6ADDR_ANY_INIT,

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* IN6ADDR_V4MAPPED_INIT, in6addr_any, and in6addr_loopback are available.

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*

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* It ensures that IN_MULTICAST() is available to check for multicast

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* addresses.

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*

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* MP:

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*\li No impact.

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*

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* Reliability:

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*\li No anticipated impact.

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*

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* Resources:

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*\li N/A.

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*

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* Security:

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*\li No anticipated impact.

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*

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* Standards:

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*\li BSD Socket API

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*\li RFC2553

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*/

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/***

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*** Imports.

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***/

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#include <isc/platform.h>

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#include <inttypes.h>

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#include <sys/types.h>

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#include <sys/socket.h> /* Contractual promise. */

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#include <net/if.h>

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#include <netinet/in.h> /* Contractual promise. */

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#include <arpa/inet.h> /* Contractual promise. */

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#ifdef ISC_PLATFORM_NEEDNETINETIN6H

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#include <netinet/in6.h> /* Required on UnixWare. */

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#endif

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#ifdef ISC_PLATFORM_NEEDNETINET6IN6H

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#include <netinet6/in6.h> /* Required on BSD/OS for in6_pktinfo. */

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#endif

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#ifndef ISC_PLATFORM_HAVEIPV6

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#include <isc/ipv6.h> /* Contractual promise. */

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#endif

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#include <isc/lang.h>

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#include <isc/types.h>

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#ifdef ISC_PLATFORM_HAVEINADDR6

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#define in6_addr in_addr6 /*%< Required for pre RFC2133 implementations. */

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#endif

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#ifdef ISC_PLATFORM_HAVEIPV6

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#ifndef IN6ADDR_ANY_INIT

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#ifdef s6_addr

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/*%

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* Required for some pre RFC2133 implementations.

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* IN6ADDR_ANY_INIT and IN6ADDR_LOOPBACK_INIT were added in

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* draft-ietf-ipngwg-bsd-api-04.txt or draft-ietf-ipngwg-bsd-api-05.txt.

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* If 's6_addr' is defined then assume that there is a union and three

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* levels otherwise assume two levels required.

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*/

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#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }

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#else

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#define IN6ADDR_ANY_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } }

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#endif

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#endif

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#ifndef IN6ADDR_LOOPBACK_INIT

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#ifdef s6_addr

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/*% IPv6 address loopback init */

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#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }

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#else

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#define IN6ADDR_LOOPBACK_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } }

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#endif

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#endif

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#ifndef IN6ADDR_V4MAPPED_INIT

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#ifdef s6_addr

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/*% IPv6 v4mapped prefix init */

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#define IN6ADDR_V4MAPPED_INIT { { { 0,0,0,0,0,0,0,0,0,0,0xff,0xff,0,0,0,0 } } }

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#else

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#define IN6ADDR_V4MAPPED_INIT { { 0,0,0,0,0,0,0,0,0,0,0xff,0xff,0,0,0,0 } }

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#endif

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#endif

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#ifndef IN6_IS_ADDR_V4MAPPED

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/*% Is IPv6 address V4 mapped? */

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#define IN6_IS_ADDR_V4MAPPED(x) \

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(memcmp((x)->s6_addr, in6addr_any.s6_addr, 10) == 0 && \

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(x)->s6_addr[10] == 0xff && (x)->s6_addr[11] == 0xff)

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#endif

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#ifndef IN6_IS_ADDR_V4COMPAT

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/*% Is IPv6 address V4 compatible? */

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#define IN6_IS_ADDR_V4COMPAT(x) \

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(memcmp((x)->s6_addr, in6addr_any.s6_addr, 12) == 0 && \

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((x)->s6_addr[12] != 0 || (x)->s6_addr[13] != 0 || \

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(x)->s6_addr[14] != 0 || \

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((x)->s6_addr[15] != 0 && (x)->s6_addr[15] != 1)))

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#endif

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#ifndef IN6_IS_ADDR_MULTICAST

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/*% Is IPv6 address multicast? */

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#define IN6_IS_ADDR_MULTICAST(a) ((a)->s6_addr[0] == 0xff)

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#endif

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#ifndef IN6_IS_ADDR_LINKLOCAL

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/*% Is IPv6 address linklocal? */

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#define IN6_IS_ADDR_LINKLOCAL(a) \

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(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))

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#endif

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#ifndef IN6_IS_ADDR_SITELOCAL

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/*% is IPv6 address sitelocal? */

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#define IN6_IS_ADDR_SITELOCAL(a) \

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(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))

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#endif

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#ifndef IN6_IS_ADDR_LOOPBACK

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/*% is IPv6 address loopback? */

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#define IN6_IS_ADDR_LOOPBACK(x) \

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(memcmp((x)->s6_addr, in6addr_loopback.s6_addr, 16) == 0)

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#endif

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#endif

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#ifndef AF_INET6

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/*% IPv6 */

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#define AF_INET6 99

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#endif

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#ifndef PF_INET6

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/*% IPv6 */

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#define PF_INET6 AF_INET6

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#endif

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#ifndef INADDR_ANY

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/*% inaddr any */

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#define INADDR_ANY 0x00000000UL

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#endif

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#ifndef INADDR_LOOPBACK

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/*% inaddr loopback */

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#define INADDR_LOOPBACK 0x7f000001UL

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#endif

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#ifndef ISC_PLATFORM_HAVEIN6PKTINFO

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/*% IPv6 packet info */

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struct in6_pktinfo {

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struct in6_addr ipi6_addr; /*%< src/dst IPv6 address */

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unsigned int ipi6_ifindex; /*%< send/recv interface index */

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};

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#endif

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#ifndef ISC_PLATFORM_HAVESOCKADDRSTORAGE

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#define _SS_MAXSIZE 128

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#define _SS_ALIGNSIZE (sizeof (uint64_t))

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#ifdef ISC_PLATFORM_HAVESALEN

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#define _SS_PAD1SIZE (_SS_ALIGNSIZE - (2 * sizeof(uint8_t)))

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#define _SS_PAD2SIZE (_SS_MAXSIZE - (_SS_ALIGNSIZE + _SS_PAD1SIZE \

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+ 2 * sizeof(uint8_t)))

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#else

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#define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(uint16_t))

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#define _SS_PAD2SIZE (_SS_MAXSIZE - (_SS_ALIGNSIZE + _SS_PAD1SIZE \

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+ sizeof(uint16_t)))

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#endif

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struct sockaddr_storage {

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#ifdef ISC_PLATFORM_HAVESALEN

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uint8_t ss_len;

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uint8_t ss_family;

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#else

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uint16_t ss_family;

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#endif

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char __ss_pad1[_SS_PAD1SIZE];

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uint64_t __ss_align; /* field to force desired structure */

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char __ss_pad2[_SS_PAD2SIZE];

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};

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#endif

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#if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRANY)

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extern const struct in6_addr isc_net_in6addrany;

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/*%

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* Cope with a missing in6addr_any and in6addr_loopback.

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*/

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#define in6addr_any isc_net_in6addrany

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#endif

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#if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRLOOPBACK)

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extern const struct in6_addr isc_net_in6addrloop;

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#define in6addr_loopback isc_net_in6addrloop

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#endif

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#ifdef ISC_PLATFORM_FIXIN6ISADDR

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#undef IN6_IS_ADDR_GEOGRAPHIC

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/*!

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* \brief

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* Fix UnixWare 7.1.1's broken IN6_IS_ADDR_* definitions.

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*/

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#define IN6_IS_ADDR_GEOGRAPHIC(a) (((a)->S6_un.S6_l[0] & 0xE0) == 0x80)

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#undef IN6_IS_ADDR_IPX

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#define IN6_IS_ADDR_IPX(a) (((a)->S6_un.S6_l[0] & 0xFE) == 0x04)

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#undef IN6_IS_ADDR_LINKLOCAL

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#define IN6_IS_ADDR_LINKLOCAL(a) (((a)->S6_un.S6_l[0] & 0xC0FF) == 0x80FE)

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#undef IN6_IS_ADDR_MULTICAST

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#define IN6_IS_ADDR_MULTICAST(a) (((a)->S6_un.S6_l[0] & 0xFF) == 0xFF)

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#undef IN6_IS_ADDR_NSAP

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#define IN6_IS_ADDR_NSAP(a) (((a)->S6_un.S6_l[0] & 0xFE) == 0x02)

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#undef IN6_IS_ADDR_PROVIDER

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#define IN6_IS_ADDR_PROVIDER(a) (((a)->S6_un.S6_l[0] & 0xE0) == 0x40)

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#undef IN6_IS_ADDR_SITELOCAL

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#define IN6_IS_ADDR_SITELOCAL(a) (((a)->S6_un.S6_l[0] & 0xC0FF) == 0xC0FE)

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#endif /* ISC_PLATFORM_FIXIN6ISADDR */

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#ifdef ISC_PLATFORM_NEEDPORTT

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/*%

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* Ensure type in_port_t is defined.

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*/

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typedef uint16_t in_port_t;

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#endif

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#ifndef MSG_TRUNC

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/*%

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* If this system does not have MSG_TRUNC (as returned from recvmsg())

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* ISC_PLATFORM_RECVOVERFLOW will be defined. This will enable the MSG_TRUNC

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* faking code in socket.c.

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*/

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#define ISC_PLATFORM_RECVOVERFLOW

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#endif

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/*% IP address. */

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#define ISC__IPADDR(x) ((uint32_t)htonl((uint32_t)(x)))

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/*% Is IP address multicast? */

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#define ISC_IPADDR_ISMULTICAST(i) \

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(((uint32_t)(i) & ISC__IPADDR(0xf0000000)) \

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== ISC__IPADDR(0xe0000000))

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#define ISC_IPADDR_ISEXPERIMENTAL(i) \

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(((uint32_t)(i) & ISC__IPADDR(0xf0000000)) \

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== ISC__IPADDR(0xf0000000))

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/***

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*** Functions.

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***/

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ISC_LANG_BEGINDECLS

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isc_result_t

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isc_net_probeipv4(void);

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/*%<

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* Check if the system's kernel supports IPv4.

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*

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* Returns:

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*

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*\li #ISC_R_SUCCESS IPv4 is supported.

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*\li #ISC_R_NOTFOUND IPv4 is not supported.

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*\li #ISC_R_DISABLED IPv4 is disabled.

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*\li #ISC_R_UNEXPECTED

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*/

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isc_result_t

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isc_net_probeipv6(void);

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/*%<

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* Check if the system's kernel supports IPv6.

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*

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* Returns:

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*

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*\li #ISC_R_SUCCESS IPv6 is supported.

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*\li #ISC_R_NOTFOUND IPv6 is not supported.

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*\li #ISC_R_DISABLED IPv6 is disabled.

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*\li #ISC_R_UNEXPECTED

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*/

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isc_result_t

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isc_net_probe_ipv6only(void);

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/*%<

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* Check if the system's kernel supports the IPV6_V6ONLY socket option.

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*

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* Returns:

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*

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*\li #ISC_R_SUCCESS the option is supported for both TCP and UDP.

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*\li #ISC_R_NOTFOUND IPv6 itself or the option is not supported.

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*\li #ISC_R_UNEXPECTED

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*/

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isc_result_t

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isc_net_probe_ipv6pktinfo(void);

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/*

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* Check if the system's kernel supports the IPV6_(RECV)PKTINFO socket option

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* for UDP sockets.

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*

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* Returns:

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*

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* \li #ISC_R_SUCCESS the option is supported.

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* \li #ISC_R_NOTFOUND IPv6 itself or the option is not supported.

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* \li #ISC_R_UNEXPECTED

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*/

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void

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isc_net_disableipv4(void);

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void

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isc_net_disableipv6(void);

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void

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isc_net_enableipv4(void);

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void

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isc_net_enableipv6(void);

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isc_result_t

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isc_net_probeunix(void);

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/*

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* Returns whether UNIX domain sockets are supported.

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*/

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#define ISC_NET_DSCPRECVV4 0x01 /* Can receive sent DSCP value IPv4 */

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#define ISC_NET_DSCPRECVV6 0x02 /* Can receive sent DSCP value IPv6 */

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#define ISC_NET_DSCPSETV4 0x04 /* Can set DSCP on socket IPv4 */

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#define ISC_NET_DSCPSETV6 0x08 /* Can set DSCP on socket IPv6 */

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#define ISC_NET_DSCPPKTV4 0x10 /* Can set DSCP on per packet IPv4 */

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#define ISC_NET_DSCPPKTV6 0x20 /* Can set DSCP on per packet IPv6 */

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#define ISC_NET_DSCPALL 0x3f /* All valid flags */

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unsigned int

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isc_net_probedscp(void);

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/*%<

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* Probe the level of DSCP support.

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*/

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isc_result_t

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isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high);

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/*%<

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* Returns system's default range of ephemeral UDP ports, if defined.

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* If the range is not available or unknown, ISC_NET_PORTRANGELOW and

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* ISC_NET_PORTRANGEHIGH will be returned.

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*

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* Requires:

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*

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*\li 'low' and 'high' must be non NULL.

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*

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* Returns:

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*

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*\li *low and *high will be the ports specifying the low and high ends of

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* the range.

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*/

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#ifdef ISC_PLATFORM_NEEDNTOP

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const char *

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isc_net_ntop(int af, const void *src, char *dst, size_t size);

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#undef inet_ntop

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#define inet_ntop isc_net_ntop

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#endif

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#ifdef ISC_PLATFORM_NEEDPTON

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int

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isc_net_pton(int af, const char *src, void *dst);

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#undef inet_pton

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#define inet_pton isc_net_pton

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#endif

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int

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isc_net_aton(const char *cp, struct in_addr *addr);

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#undef inet_aton

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#define inet_aton isc_net_aton

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ISC_LANG_ENDDECLS

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#endif /* ISC_NET_H */

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