ObjFW  Check-in [3dec8ecf2e]

		enable_files="no"
		ac_cv_snprintf_useful_ret="yes"
		;;
	m68k-*-amigaos*)
		AS_IF([test x"$OBJCFLAGS" = x""], [
			OBJCFLAGS="-O0"
		])
		OBJCFLAGS="$OBJCFLAGS -noixemul -D__NO_NET_API"
		OBJFW_OBJCFLAGS="$OBJFW_OBJCFLAGS -noixemul"
		LDFLAGS="$LDFLAGS -noixemul"

		enable_shared="no"
		enable_threads="no"

		enable_files="yes"	# Required for reading ENV:
		supports_amiga_lib="yes"
		ac_cv_snprintf_useful_ret="yes"

		AS_IF([test x"$enable_amiga_lib" != x"no"], [
			AC_SUBST(OBJFWRT_AMIGA_LIB, objfwrt68k.library)
			AC_SUBST(SFDC_TARGET, m68k-amigaos)

AC_CHECK_HEADERS(xlocale.h)
AC_CHECK_FUNCS([strtod_l strtof_l asprintf_l])

AC_CHECK_HEADERS(sys/utsname.h)
AC_CHECK_FUNCS(uname)

case "$host_os" in
	amigaos*)
		;;
	*)
		AC_CHECK_FUNC(pipe, [
			AC_DEFINE(OF_HAVE_PIPE, 1, [Whether we have pipe()])
		])
		;;
esac

AC_ARG_ENABLE(sockets,
	AS_HELP_STRING([--disable-sockets], [disable socket support]))
AS_IF([test x"$enable_sockets" != x"no"], [
	AC_DEFINE(OF_HAVE_SOCKETS, 1, [Whether we have sockets])
	AC_SUBST(USE_SRCS_SOCKETS, '${SRCS_SOCKETS}')



	case "$host_os" in
		amigaos*)
			;;
		haiku*)
			LIBS="$LIBS -lnetwork"
			;;
		mingw*)
			LIBS="$LIBS -lws2_32 -liphlpapi"
			;;
		*)
			AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
			;;
	esac

	AC_CHECK_HEADER(sys/socket.h, [
		AC_DEFINE(OF_HAVE_SYS_SOCKET_H, 1,
			[Whether we have sys/socket.h])
	])
	AC_CHECK_HEADER(netinet/in.h, [
		AC_DEFINE(OF_HAVE_NETINET_IN_H, 1,
			[Whether we have netinet/in.h])
	])
	AC_CHECK_HEADER(netinet/tcp.h, [
		AC_DEFINE(OF_HAVE_NETINET_TCP_H, 1,
			[Whether we have netinet/tcp.h])
	])
	AC_CHECK_HEADERS([arpa/inet.h netdb.h])

	AC_CHECK_MEMBER([struct sockaddr_in6.sin6_addr], [
		AC_EGREP_CPP(egrep_cpp_yes, [
			#ifdef _WIN32
			typedef int BOOL;
			#endif

			#ifdef OF_HAVE_SYS_SOCKET_H
			# include <sys/socket.h>
			#endif

			#ifdef _WIN32
			# ifdef __MINGW32__

			egrep_cpp_yes
			#endif
		], [
			AC_DEFINE(OF_HAVE_IPV6, 1, [Whether we have IPv6])
		])
	], [
	], [
		#ifdef _WIN32
		typedef int BOOL;
		#endif

		#ifdef OF_HAVE_NETINET_IN_H
		# include <netinet/in.h>
		#endif

		#ifdef _WIN32
		# ifdef __MINGW32__

			AC_DEFINE(HAVE_POLL, 1, [Whether we have poll()])
			AC_SUBST(OFPOLLKERNELEVENTOBSERVER_M,
				"OFPollKernelEventObserver.m")
		])
	])

	case "$host_os" in
		amigaos* | mingw* | morphos*)
			AC_DEFINE(HAVE_SELECT, 1,
				[Whether we have select() or similar])
			AC_SUBST(OFSELECTKERNELEVENTOBSERVER_M,
				"OFSelectKernelEventObserver.m")
			;;
		*)
			AC_CHECK_HEADERS(sys/select.h)

#ifdef OF_WINDOWS
# define interface struct
# include <iphlpapi.h>
# undef interface
#endif

#ifdef OF_AMIGAOS
# ifdef OF_AMIGAOS4
#  define __USE_INLINE__
# endif

# include <proto/exec.h>
# include <proto/bsdsocket.h>
#endif

#ifdef OF_NINTENDO_3DS
# include <3ds.h>
#endif

# define HOSTS_PATH @"DEVS:Internet/hosts"
#elif defined(OF_AMIGAOS)
# define HOSTS_PATH @"AmiTCP:db/hosts"
# define RESOLV_CONF_PATH @"AmiTCP:db/resolv.conf"
#else
# define HOSTS_PATH @"/etc/hosts"
# define RESOLV_CONF_PATH @"/etc/resolv.conf"















#endif

/*
 * TODO:
 *
 *  - Fallback to TCP
 */

@implementation OFDNSResolver
@synthesize staticHosts = _staticHosts, nameServers = _nameServers;
@synthesize localDomain = _localDomain, searchDomains = _searchDomains;
@synthesize timeout = _timeout, maxAttempts = _maxAttempts;
@synthesize minNumberOfDotsInAbsoluteName = _minNumberOfDotsInAbsoluteName;
@synthesize usesTCP = _usesTCP, configReloadInterval = _configReloadInterval;

#ifdef OF_AMIGAOS
+ (void)initialize
{
	if (self != [OFDNSResolver class])
		return;




	if (!of_socket_init())


		@throw [OFInitializationFailedException
		    exceptionWithClass: self];
}
#endif

+ (instancetype)resolver
{

		if (_cancelFD[0] == INVALID_SOCKET)
			@throw [OFInitializationFailedException
			    exceptionWithClass: self.class];

		_cancelAddr.sin_family = AF_INET;
		_cancelAddr.sin_port = 0;
		_cancelAddr.sin_addr.s_addr = inet_addr((void *)"127.0.0.1");

# ifdef OF_WII
		_cancelAddr.sin_len = 8;
# endif

# if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
		if (bind(_cancelFD[0], (struct sockaddr *)&_cancelAddr,
		    sizeof(_cancelAddr)) != 0)

{
#ifdef OF_HAVE_PIPE
	OF_ENSURE(write(_cancelFD[1], "", 1) > 0);
#elif defined(OF_WII)
	OF_ENSURE(sendto(_cancelFD[1], "", 1, 0,
	    (struct sockaddr *)&_cancelAddr, 8) > 0);
#else
	OF_ENSURE(sendto(_cancelFD[1], (void *)"", 1, 0,
	    (struct sockaddr *)&_cancelAddr, sizeof(_cancelAddr)) > 0);
#endif
}
@end

- (bool)isBlocking
{
	return _blocking;
}

- (void)setBlocking: (bool)enable
{
#if defined(HAVE_FCNTL) && !defined(OF_AMIGAOS)
	bool readImplemented = false, writeImplemented = false;

	@try {
		int readFlags;

		readFlags = fcntl(((id <OFReadyForReadingObserving>)self)
		    .fileDescriptorForReading, F_GETFL, 0);

#ifndef OF_WINDOWS
	ssize_t bytesWritten;

	if (length > SSIZE_MAX)
		@throw [OFOutOfRangeException exception];

	if ((bytesWritten = send(_socket, (void *)buffer, length, 0)) < 0)
		@throw [OFWriteFailedException
		    exceptionWithObject: self
			requestedLength: length
			   bytesWritten: 0
				  errNo: of_socket_errno()];
#else
	int bytesWritten;

			   bytesWritten: 0
				  errNo: of_socket_errno()];
#endif

	return (size_t)bytesWritten;
}

#if defined(OF_WINDOWS) || defined(OF_AMIGAOS)
- (void)setBlocking: (bool)enable
{
# ifdef OF_WINDOWS
	u_long v = enable;
# else
	char v = enable;
# endif

- (bool)of_connectSocketToAddress: (const of_socket_address_t *)address
			    errNo: (int *)errNo
{
	if (_socket == INVALID_SOCKET)
		@throw [OFNotOpenException exceptionWithObject: self];

	if (connect(_socket, (struct sockaddr *)&address->sockaddr.sockaddr,
	    address->length) != 0) {
		*errNo = of_socket_errno();
		return false;
	}

	return true;
}

#if SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
	if ((flags = fcntl(_socket, F_GETFD, 0)) != -1)
		fcntl(_socket, F_SETFD, flags | FD_CLOEXEC);
#endif

	setsockopt(_socket, SOL_SOCKET, SO_REUSEADDR,
	    (char *)&one, (socklen_t)sizeof(one));

#if defined(OF_WII) || defined(OF_NINTENDO_3DS)
	if (port != 0) {
#endif
		if (bind(_socket, &address.sockaddr.sockaddr,
		    address.length) != 0) {
			int errNo = of_socket_errno();

#ifndef OF_WINDOWS
	ssize_t bytesWritten;

	if (length > SSIZE_MAX)
		@throw [OFOutOfRangeException exception];

	if ((bytesWritten = sendto(_socket, (void *)buffer, length, 0,
	    (struct sockaddr *)&receiver->sockaddr.sockaddr,
	    receiver->length)) < 0)
		@throw [OFWriteFailedException
		    exceptionWithObject: self
			requestedLength: length
			   bytesWritten: 0
				  errNo: of_socket_errno()];
#else
	int bytesWritten;

#import "socket.h"
#import "socket_helpers.h"
#ifdef OF_HAVE_THREADS
# include "mutex.h"
#endif
#include "once.h"

#ifdef OF_AMIGAOS
# include <proto/exec.h>
#endif

#ifdef OF_NINTENDO_3DS
# include <3ds/types.h>
# include <3ds/services/soc.h>
#endif

#ifdef OF_HAVE_THREADS
static of_mutex_t mutex;
#endif
#ifdef OF_AMIGAOS
/* TODO: Support multiple threads */
struct Library *SocketBase;
# ifdef OF_AMIGAOS4
struct SocketIFace *ISocket = NULL;
# endif
#endif
static bool initSuccessful = false;

static void
init(void)
{
#if defined(OF_WINDOWS)
	WSADATA wsa;

	if (WSAStartup(MAKEWORD(2, 0), &wsa))
		return;
#elif defined(OF_AMIGAOS)
	if ((SocketBase = OpenLibrary("bsdsocket.library", 4)) == NULL)
		return;

# ifdef OF_AMIGAOS4
	if ((ISocket = (struct SocketIFace *)
	    GetInterface(SocketBase, "main", 1, NULL)) == NULL) {
		CloseLibrary(SocketBase);
		return;
	}
# endif
#elif defined(OF_WII)
	if (net_init() < 0)
		return;
#elif defined(OF_NINTENDO_3DS)
	void *ctx;

	if ((ctx = memalign(0x1000, 0x100000)) == NULL)

		return;
# endif
#endif

	initSuccessful = true;
}

#ifdef OF_AMIGAOS
OF_DESTRUCTOR()
{
# ifdef OF_AMIGAOS4
	if (ISocket != NULL)
		DropInterface((struct Interface *)ISocket);
# endif

	if (SocketBase != NULL)
		CloseLibrary(SocketBase);
}
#endif

bool
of_socket_init()
{
	static of_once_t onceControl = OF_ONCE_INIT;
	of_once(&onceControl, init);

	return initSuccessful;
}

int
of_socket_errno()
{
#if defined(OF_WINDOWS)


	switch (WSAGetLastError()) {
	case WSAEACCES:
		return EACCES;
	case WSAEADDRINUSE:
		return EADDRINUSE;
	case WSAEADDRNOTAVAIL:
		return EADDRNOTAVAIL;

	case WSAEUSERS:
		return EUSERS;
	case WSAEWOULDBLOCK:
		return EWOULDBLOCK;
	}

	return 0;
#elif defined(OF_AMIGAOS)
	return Errno();
#else
	return errno;
#endif
}

#ifndef OF_WII
int
of_getsockname(of_socket_t sock, struct sockaddr *restrict addr,
    socklen_t *restrict addrLen)

# define SOMAXCONN 16
#endif

#ifndef SOCK_CLOEXEC
# define SOCK_CLOEXEC 0
#endif

#if defined(OF_AMIGAOS)
# ifdef OF_AMIGAOS4
#  define __USE_INLINE__
# endif
# include <proto/bsdsocket.h>
# include <sys/filio.h>
# define closesocket(sock) CloseSocket(sock)
# define ioctlsocket(fd, req, arg) IoctlSocket(fd, req, arg)
# define hstrerror(err) "unknown (no hstrerror)"
# define SOCKET_ERROR -1
# ifdef OF_MORPHOS
typedef uint32_t in_addr_t;
# endif
#elif !defined(OF_WINDOWS) && !defined(OF_WII)
# define closesocket(sock) close(sock)
#endif

#ifdef OF_MORPHOS_IXEMUL
typedef uint32_t in_addr_t;
#endif

#if defined(OF_AMIGAOS_M68K)
# define select(nfds, readfds, writefds, errorfds, timeout) \
    WaitSelect(nfds, readfds, writefds, errorfds, (struct __timeval *)timeout, \
    NULL)
#elif defined(OF_AMIGAOS4)
# define select(nfds, readfds, writefds, errorfds, timeout) \
    WaitSelect(nfds, readfds, writefds, errorfds, (struct TimeVal *)timeout, \
    NULL)
#elif defined(OF_MORPHOS)
# define select(nfds, readfds, writefds, errorfds, timeout) \
    WaitSelect(nfds, readfds, writefds, errorfds, timeout, NULL)
#endif

#ifdef OF_WII
# define accept(sock, addr, addrlen) net_accept(sock, addr, addrlen)
# define bind(sock, addr, addrlen) net_bind(sock, addr, addrlen)
# define closesocket(sock) net_close(sock)
# define connect(sock, addr, addrlen) \
    net_connect(sock, (struct sockaddr *)addr, addrlen)