330 lines
8.1 KiB
C
330 lines
8.1 KiB
C
/*
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* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: net.h,v 1.31.2.2.10.8 2004/04/29 01:31:23 marka Exp $ */
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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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/*
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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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* struct in_addr
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* struct in6_addr
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* struct in6_pktinfo
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* struct sockaddr
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* struct sockaddr_in
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* struct sockaddr_in6
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* 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_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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* No impact.
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*
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* Reliability:
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* No anticipated impact.
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*
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* Resources:
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* N/A.
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*
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* Security:
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* No anticipated impact.
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*
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* Standards:
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* BSD Socket API
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* RFC 2553
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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 <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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/*
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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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#ifndef IN6ADDR_ANY_INIT
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#ifdef s6_addr
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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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#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 IN6_IS_ADDR_V4MAPPED
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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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#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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#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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#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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#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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#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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#define AF_INET6 99
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#endif
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#ifndef PF_INET6
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#define PF_INET6 AF_INET6
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#endif
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#ifndef INADDR_LOOPBACK
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#define INADDR_LOOPBACK 0x7f000001UL
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#endif
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#if 0
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#ifndef ISC_PLATFORM_HAVEIN6PKTINFO
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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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#endif
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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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#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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#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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/*
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* Fix UnixWare 7.1.1's broken IN6_IS_ADDR_* definitions.
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*/
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#ifdef ISC_PLATFORM_FIXIN6ISADDR
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#undef IN6_IS_ADDR_GEOGRAPHIC
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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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/*
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* Ensure type in_port_t is defined.
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*/
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#ifdef ISC_PLATFORM_NEEDPORTT
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typedef isc_uint16_t in_port_t;
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#endif
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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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#ifndef MSG_TRUNC
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#define ISC_PLATFORM_RECVOVERFLOW
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#endif
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#define ISC__IPADDR(x) ((isc_uint32_t)htonl((isc_uint32_t)(x)))
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#define ISC_IPADDR_ISMULTICAST(i) \
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(((isc_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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(((isc_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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* ISC_R_SUCCESS IPv4 is supported.
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* ISC_R_NOTFOUND IPv4 is not supported.
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* ISC_R_DISABLED IPv4 is disabled.
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* 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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* ISC_R_SUCCESS IPv6 is supported.
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* ISC_R_NOTFOUND IPv6 is not supported.
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* ISC_R_DISABLED IPv6 is disabled.
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* 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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* ISC_R_SUCCESS the option is supported for both TCP and UDP.
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* ISC_R_NOTFOUND IPv6 itself or the option is not supported.
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* 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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* ISC_R_SUCCESS the option is supported.
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* ISC_R_NOTFOUND IPv6 itself or the option is not supported.
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* 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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#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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#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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#ifdef ISC_PLATFORM_NEEDATON
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int
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isc_net_aton(const char *cp, struct in_addr *addr);
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#define inet_aton isc_net_aton
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#endif
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ISC_LANG_ENDDECLS
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#endif /* ISC_NET_H */
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