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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* 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_NET_H
#define ISC_NET_H 1
/*****
***** Module Info
*****/
/*
* Basic Networking Types
*
* This module is responsible for defining the following basic networking
* types:
*
* struct in_addr
* struct in6_addr
* struct in6_pktinfo
* struct sockaddr
* struct sockaddr_in
* struct sockaddr_in6
* in_port_t
*
* It ensures that the AF_ and PF_ macros are defined.
*
* It declares ntoh[sl]() and hton[sl]().
*
* It declares inet_ntop(), and inet_pton().
*
* It ensures that INADDR_ANY, IN6ADDR_ANY_INIT, in6addr_any, and
* in6addr_loopback are available.
*
* It ensures that IN_MULTICAST() is available to check for multicast
* addresses.
*
* MP:
* No impact.
*
* Reliability:
* No anticipated impact.
*
* Resources:
* N/A.
*
* Security:
* No anticipated impact.
*
* Standards:
* BSD Socket API
* RFC2553
*/
/***
*** Imports.
***/
#include <inttypes.h>
#include <isc/platform.h>
/*
* Because of some sort of problem in the MS header files, this cannot
* be simple "#include <winsock2.h>", because winsock2.h tries to include
* windows.h, which then generates an error out of mswsock.h. _You_
* figure it out.
*/
#ifndef _WINSOCKAPI_
#define _WINSOCKAPI_ /* Prevent inclusion of winsock.h in windows.h */
#endif /* ifndef _WINSOCKAPI_ */
#include <winsock2.h>
#include <ws2tcpip.h>
#include <isc/ipv6.h>
#include <isc/lang.h>
#include <isc/types.h>
#include <sys/types.h>
/*
* This is here because named client, interfacemgr.c, etc. use the name as
* a variable
*/
#undef interface
#ifndef INADDR_ANY
#define INADDR_ANY 0x00000000UL
#endif /* ifndef INADDR_ANY */
#ifndef INADDR_LOOPBACK
#define INADDR_LOOPBACK 0x7f000001UL
#endif /* ifndef INADDR_LOOPBACK */
#if _MSC_VER < 1300
#define in6addr_any isc_in6addr_any
#define in6addr_loopback isc_in6addr_loopback
#endif /* if _MSC_VER < 1300 */
/*
* Ensure type in_port_t is defined.
*/
typedef uint16_t in_port_t;
/*
* If this system does not have MSG_TRUNC (as returned from recvmsg())
* ISC_PLATFORM_RECVOVERFLOW will be defined. This will enable the MSG_TRUNC
* faking code in socket.c.
*/
#ifndef MSG_TRUNC
#define ISC_PLATFORM_RECVOVERFLOW
#endif /* ifndef MSG_TRUNC */
#define ISC__IPADDR(x) ((uint32_t)htonl((uint32_t)(x)))
#define ISC_IPADDR_ISMULTICAST(i) \
(((uint32_t)(i)&ISC__IPADDR(0xf0000000)) == ISC__IPADDR(0xe0000000))
#define ISC_IPADDR_ISEXPERIMENTAL(i) \
(((uint32_t)(i)&ISC__IPADDR(0xf0000000)) == ISC__IPADDR(0xf0000000))
/*
* Fix the FD_SET and FD_CLR Macros to properly cast
*/
#undef FD_CLR
#define FD_CLR(fd, set) \
do { \
u_int __i; \
for (__i = 0; __i < ((fd_set FAR *)(set))->fd_count; __i++) { \
if (((fd_set FAR *)(set))->fd_array[__i] == \
(SOCKET)fd) { \
while (__i < \
((fd_set FAR *)(set))->fd_count - 1) \
{ \
((fd_set FAR *)(set))->fd_array[__i] = \
((fd_set FAR *)(set)) \
->fd_array[__i + 1]; \
__i++; \
} \
((fd_set FAR *)(set))->fd_count--; \
break; \
} \
} \
} while (0)
#undef FD_SET
#define FD_SET(fd, set) \
do { \
u_int __i; \
for (__i = 0; __i < ((fd_set FAR *)(set))->fd_count; __i++) { \
if (((fd_set FAR *)(set))->fd_array[__i] == \
(SOCKET)(fd)) \
{ \
break; \
} \
} \
if (__i == ((fd_set FAR *)(set))->fd_count) { \
if (((fd_set FAR *)(set))->fd_count < FD_SETSIZE) { \
((fd_set FAR *)(set))->fd_array[__i] = \
(SOCKET)(fd); \
((fd_set FAR *)(set))->fd_count++; \
} \
} \
} while (0)
/*
* Windows Sockets errors redefined as regular Berkeley error constants.
* These are usually commented out in Windows NT to avoid conflicts with
* errno.h. Use the WSA constants instead.
*/
#include <errno.h>
#ifndef EWOULDBLOCK
#define EWOULDBLOCK WSAEWOULDBLOCK
#endif /* ifndef EWOULDBLOCK */
#ifndef EINPROGRESS
#define EINPROGRESS WSAEINPROGRESS
#endif /* ifndef EINPROGRESS */
#ifndef EALREADY
#define EALREADY WSAEALREADY
#endif /* ifndef EALREADY */
#ifndef ENOTSOCK
#define ENOTSOCK WSAENOTSOCK
#endif /* ifndef ENOTSOCK */
#ifndef EDESTADDRREQ
#define EDESTADDRREQ WSAEDESTADDRREQ
#endif /* ifndef EDESTADDRREQ */
#ifndef EMSGSIZE
#define EMSGSIZE WSAEMSGSIZE
#endif /* ifndef EMSGSIZE */
#ifndef EPROTOTYPE
#define EPROTOTYPE WSAEPROTOTYPE
#endif /* ifndef EPROTOTYPE */
#ifndef ENOPROTOOPT
#define ENOPROTOOPT WSAENOPROTOOPT
#endif /* ifndef ENOPROTOOPT */
#ifndef EPROTONOSUPPORT
#define EPROTONOSUPPORT WSAEPROTONOSUPPORT
#endif /* ifndef EPROTONOSUPPORT */
#ifndef ESOCKTNOSUPPORT
#define ESOCKTNOSUPPORT WSAESOCKTNOSUPPORT
#endif /* ifndef ESOCKTNOSUPPORT */
#ifndef EOPNOTSUPP
#define EOPNOTSUPP WSAEOPNOTSUPP
#endif /* ifndef EOPNOTSUPP */
#ifndef EPFNOSUPPORT
#define EPFNOSUPPORT WSAEPFNOSUPPORT
#endif /* ifndef EPFNOSUPPORT */
#ifndef EAFNOSUPPORT
#define EAFNOSUPPORT WSAEAFNOSUPPORT
#endif /* ifndef EAFNOSUPPORT */
#ifndef EADDRINUSE
#define EADDRINUSE WSAEADDRINUSE
#endif /* ifndef EADDRINUSE */
#ifndef EADDRNOTAVAIL
#define EADDRNOTAVAIL WSAEADDRNOTAVAIL
#endif /* ifndef EADDRNOTAVAIL */
#ifndef ENETDOWN
#define ENETDOWN WSAENETDOWN
#endif /* ifndef ENETDOWN */
#ifndef ENETUNREACH
#define ENETUNREACH WSAENETUNREACH
#endif /* ifndef ENETUNREACH */
#ifndef ENETRESET
#define ENETRESET WSAENETRESET
#endif /* ifndef ENETRESET */
#ifndef ECONNABORTED
#define ECONNABORTED WSAECONNABORTED
#endif /* ifndef ECONNABORTED */
#ifndef ECONNRESET
#define ECONNRESET WSAECONNRESET
#endif /* ifndef ECONNRESET */
#ifndef ENOBUFS
#define ENOBUFS WSAENOBUFS
#endif /* ifndef ENOBUFS */
#ifndef EISCONN
#define EISCONN WSAEISCONN
#endif /* ifndef EISCONN */
#ifndef ENOTCONN
#define ENOTCONN WSAENOTCONN
#endif /* ifndef ENOTCONN */
#ifndef ESHUTDOWN
#define ESHUTDOWN WSAESHUTDOWN
#endif /* ifndef ESHUTDOWN */
#ifndef ETOOMANYREFS
#define ETOOMANYREFS WSAETOOMANYREFS
#endif /* ifndef ETOOMANYREFS */
#ifndef ETIMEDOUT
#define ETIMEDOUT WSAETIMEDOUT
#endif /* ifndef ETIMEDOUT */
#ifndef ECONNREFUSED
#define ECONNREFUSED WSAECONNREFUSED
#endif /* ifndef ECONNREFUSED */
#ifndef ELOOP
#define ELOOP WSAELOOP
#endif /* ifndef ELOOP */
#ifndef EHOSTDOWN
#define EHOSTDOWN WSAEHOSTDOWN
#endif /* ifndef EHOSTDOWN */
#ifndef EHOSTUNREACH
#define EHOSTUNREACH WSAEHOSTUNREACH
#endif /* ifndef EHOSTUNREACH */
#ifndef EPROCLIM
#define EPROCLIM WSAEPROCLIM
#endif /* ifndef EPROCLIM */
#ifndef EUSERS
#define EUSERS WSAEUSERS
#endif /* ifndef EUSERS */
#ifndef EDQUOT
#define EDQUOT WSAEDQUOT
#endif /* ifndef EDQUOT */
#ifndef ESTALE
#define ESTALE WSAESTALE
#endif /* ifndef ESTALE */
#ifndef EREMOTE
#define EREMOTE WSAEREMOTE
#endif /* ifndef EREMOTE */
/***
*** Functions.
***/
ISC_LANG_BEGINDECLS
isc_result_t
isc_net_probeipv4(void);
/*
* Check if the system's kernel supports IPv4.
*
* Returns:
*
* ISC_R_SUCCESS IPv4 is supported.
* ISC_R_NOTFOUND IPv4 is not supported.
* ISC_R_DISABLED IPv4 is disabled.
* ISC_R_UNEXPECTED
*/
isc_result_t
isc_net_probeipv6(void);
/*
* Check if the system's kernel supports IPv6.
*
* Returns:
*
* ISC_R_SUCCESS IPv6 is supported.
* ISC_R_NOTFOUND IPv6 is not supported.
* ISC_R_DISABLED IPv6 is disabled.
* ISC_R_UNEXPECTED
*/
isc_result_t
isc_net_probeunix(void);
/*
* Check if UNIX domain sockets are supported.
*
* Returns:
*
* ISC_R_SUCCESS
* ISC_R_NOTFOUND
*/
#define ISC_NET_DSCPRECVV4 0x01 /* Can receive sent DSCP value IPv4 */
#define ISC_NET_DSCPRECVV6 0x02 /* Can receive sent DSCP value IPv6 */
#define ISC_NET_DSCPSETV4 0x04 /* Can set DSCP on socket IPv4 */
#define ISC_NET_DSCPSETV6 0x08 /* Can set DSCP on socket IPv6 */
#define ISC_NET_DSCPPKTV4 0x10 /* Can set DSCP on per packet IPv4 */
#define ISC_NET_DSCPPKTV6 0x20 /* Can set DSCP on per packet IPv6 */
#define ISC_NET_DSCPALL 0x3f /* All valid flags */
unsigned int
isc_net_probedscp(void);
/*%<
* Probe the level of DSCP support.
*/
isc_result_t
isc_net_probe_ipv6only(void);
/*
* Check if the system's kernel supports the IPV6_V6ONLY socket option.
*
* Returns:
*
* ISC_R_SUCCESS the option is supported for both TCP and UDP.
* ISC_R_NOTFOUND IPv6 itself or the option is not supported.
* ISC_R_UNEXPECTED
*/
isc_result_t
isc_net_probe_ipv6pktinfo(void);
/*
* Check if the system's kernel supports the IPV6_(RECV)PKTINFO socket option
* for UDP sockets.
*
* Returns:
*
* ISC_R_SUCCESS the option is supported.
* ISC_R_NOTFOUND IPv6 itself or the option is not supported.
* ISC_R_UNEXPECTED
*/
void
isc_net_disableipv4(void);
void
isc_net_disableipv6(void);
void
isc_net_enableipv4(void);
void
isc_net_enableipv6(void);
isc_result_t
isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high);
/*%<
* Returns system's default range of ephemeral UDP ports, if defined.
* If the range is not available or unknown, ISC_NET_PORTRANGELOW and
* ISC_NET_PORTRANGEHIGH will be returned.
*
* Requires:
*
*\li 'low' and 'high' must be non NULL.
*
* Returns:
*
*\li *low and *high will be the ports specifying the low and high ends of
* the range.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_NET_H */
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