440fb3d225
The Windows support has been completely removed from the source tree and BIND 9 now no longer supports native compilation on Windows. We might consider reviewing mingw-w64 port if contributed by external party, but no development efforts will be put into making BIND 9 compile and run on Windows again.
309 lines
8.4 KiB
C
309 lines
8.4 KiB
C
/*
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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_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 <inttypes.h>
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#include <isc/lang.h>
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#include <isc/platform.h>
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#include <isc/types.h>
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#include <arpa/inet.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 <sys/socket.h> /* Contractual promise. */
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#include <sys/types.h>
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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 \
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{ \
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{ \
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{ \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 \
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} \
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} \
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}
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#else /* ifdef s6_addr */
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#define IN6ADDR_LOOPBACK_INIT \
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{ \
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{ \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 \
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} \
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}
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#endif /* ifdef s6_addr */
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#endif /* ifndef IN6ADDR_LOOPBACK_INIT */
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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 \
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{ \
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{ \
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{ \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0, \
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0, 0, 0 \
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} \
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} \
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}
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#else /* ifdef s6_addr */
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#define IN6ADDR_V4MAPPED_INIT \
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{ \
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{ \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 0, 0, 0 \
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} \
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}
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#endif /* ifdef s6_addr */
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#endif /* ifndef IN6ADDR_V4MAPPED_INIT */
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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 /* ifndef IN6_IS_ADDR_V4MAPPED */
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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 /* ifndef IN6_IS_ADDR_V4COMPAT */
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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 /* ifndef IN6_IS_ADDR_MULTICAST */
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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 /* ifndef IN6_IS_ADDR_LINKLOCAL */
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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 /* ifndef IN6_IS_ADDR_SITELOCAL */
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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 /* ifndef IN6_IS_ADDR_LOOPBACK */
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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 /* ifndef AF_INET6 */
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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 /* ifndef PF_INET6 */
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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 /* ifndef INADDR_ANY */
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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 /* ifndef INADDR_LOOPBACK */
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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 /* ifndef MSG_TRUNC */
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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)) == ISC__IPADDR(0xe0000000))
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#define ISC_IPADDR_ISEXPERIMENTAL(i) \
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(((uint32_t)(i)&ISC__IPADDR(0xf0000000)) == 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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ISC_LANG_ENDDECLS
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#endif /* ISC_NET_H */
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