OpenJDK 27 · sun.nio.ch.Net · APIdia, the JavaDoc alternative

Modifier and Type	Field and Description
private static final InetAddress	ANY_LOCAL_INET4ADDRESS
private static final InetAddress	ANY_LOCAL_INET6ADDRESS
private static final boolean	EXCLUSIVE_BIND
pack-priv static final ExtendedSocketOptions	EXTENDED_OPTIONS
private static final boolean	FAST_LOOPBACK
private static final InetAddress	INET4_LOOPBACK_ADDRESS
private static final InetAddress	INET6_LOOPBACK_ADDRESS
private static final boolean	IPV6_AVAILABLE
public static final short	POLLCONN
public static final short	POLLERR
public static final short	POLLHUP
public static final short	POLLIN Event masks for the various poll system calls.
public static final short	POLLNVAL
public static final short	POLLOUT
public static final int	SHUT_RD
public static final int	SHUT_RDWR
public static final int	SHUT_WR
private static final LazyConstant<Boolean>	SHUTDOWN_WRITE_BEFORE_CLOSE
private static final boolean	SO_REUSEPORT_AVAILABLE
pack-priv static final ProtocolFamily	UNSPEC

Access	Constructor and Description
private	Net()

Method Summary

Modifier and Type	Method and Description
public static native int	accept(FileDescriptor fd, FileDescriptor newfd, InetSocketAddress[] isaa)
pack-priv static Inet4Address	anyInet4Address(final NetworkInterface interf) Returns any IPv4 address of the given network interface, or null if the interface does not have any IPv4 addresses.
pack-priv static InetAddress	anyLocalAddress(ProtocolFamily family) Returns the wildcard address that corresponds to the given protocol family.
pack-priv static InetSocketAddress	asInetSocketAddress(SocketAddress sa)
pack-priv static native int	available(FileDescriptor fd) Return the number of bytes in the socket input buffer.
public static void	bind(FileDescriptor fd, InetAddress addr, int port)
pack-priv static void	bind(ProtocolFamily family, FileDescriptor fd, InetAddress addr, int port)
private static native void	bind0(FileDescriptor fd, boolean preferIPv6, boolean useExclBind, InetAddress addr, int port)
pack-priv static int	block4(FileDescriptor fd, int group, int interf, int source) Block IPv4 source
pack-priv static int	block6(FileDescriptor fd, byte[] group, int index, byte[] source) Block IPv6 source
private static native int	blockOrUnblock4(boolean block, FileDescriptor fd, int group, int interf, int source)
pack-priv static native int	blockOrUnblock6(boolean block, FileDescriptor fd, byte[] group, int index, byte[] source)
pack-priv static boolean	canIPv6SocketJoinIPv4Group() Tells whether IPv6 sockets can join IPv4 multicast groups
private static native boolean	canIPv6SocketJoinIPv4Group0()
pack-priv static boolean	canJoin6WithIPv4Group() Tells whether `join6` can be used to join an IPv4 multicast group (IPv4 group as IPv4-mapped IPv6 address)
private static native boolean	canJoin6WithIPv4Group0()
pack-priv static boolean	canUseIPv6OptionsWithIPv4LocalAddress() Tells whether IPV6_XXX socket options should be used on an IPv6 socket that is bound to an IPv4 address.
private static native boolean	canUseIPv6OptionsWithIPv4LocalAddress0()
public static InetSocketAddress	checkAddress(SocketAddress sa)
pack-priv static InetSocketAddress	checkAddress(SocketAddress sa, ProtocolFamily family)
pack-priv static int	connect(FileDescriptor fd, InetAddress remote, int remotePort)
pack-priv static int	connect(ProtocolFamily family, FileDescriptor fd, InetAddress remote, int remotePort)
pack-priv static int	connect(ProtocolFamily family, FileDescriptor fd, SocketAddress remote)
private static native int	connect0(boolean preferIPv6, FileDescriptor fd, InetAddress remote, int remotePort)
pack-priv static native boolean	discardOOB(FileDescriptor fd) Read and discard urgent data (MSG_OOB) on the socket.
pack-priv static void	drop4(FileDescriptor fd, int group, int interf, int source) Drop membership of IPv4 multicast group
pack-priv static void	drop6(FileDescriptor fd, byte[] group, int index, byte[] source) Drop membership of IPv6 multicast group
pack-priv static native int	getInterface4(FileDescriptor fd)
pack-priv static native int	getInterface6(FileDescriptor fd)
private static native int	getIntOption0(FileDescriptor fd, boolean mayNeedConversion, int level, int opt)
pack-priv static Object	getSocketOption(FileDescriptor fd, SocketOption<?> name)
pack-priv static Object	getSocketOption(FileDescriptor fd, ProtocolFamily family, SocketOption<?> name)
pack-priv static int	inet4AsInt(InetAddress ia) Returns an IPv4 address as an int.
pack-priv static InetAddress	inet4FromInt(int address) Returns an InetAddress from the given IPv4 address represented as an int.
pack-priv static InetAddress	inet4LoopbackAddress()
pack-priv static byte[]	inet6AsByteArray(InetAddress ia) Returns an IPv6 address as a byte array
pack-priv static InetAddress	inet6LoopbackAddress()
private static native void	initIDs()
private static native int	isExclusiveBindAvailable()
private static boolean	isFastTcpLoopbackRequested()
pack-priv static boolean	isIPv6Available() Tells whether dual-IPv4/IPv6 sockets should be used.
private static native boolean	isIPv6Available0()
pack-priv static boolean	isReusePortAvailable() Tells whether SO_REUSEPORT is supported.
private static native boolean	isReusePortAvailable0()
pack-priv static int	join4(FileDescriptor fd, int group, int interf, int source) Join IPv4 multicast group
pack-priv static int	join6(FileDescriptor fd, byte[] group, int index, byte[] source) Join IPv6 multicast group
private static native int	joinOrDrop4(boolean join, FileDescriptor fd, int group, int interf, int source)
private static native int	joinOrDrop6(boolean join, FileDescriptor fd, byte[] group, int index, byte[] source)
pack-priv static native void	listen(FileDescriptor fd, int backlog)
public static InetSocketAddress	localAddress(FileDescriptor fd)
private static native InetAddress	localInetAddress(FileDescriptor fd)
private static native int	localPort(FileDescriptor fd)
private static SocketException	newSocketException(String msg)
pack-priv static native int	Returns: the polled events or 0 if no events are polled poll(FileDescriptor fd, int events, long the timeout to wait; 0 to not wait, -1 to wait indefinitely timeout) Polls a file descriptor for events.
public static native boolean	Returns: true if connected pollConnect(FileDescriptor fd, long the timeout to wait; 0 to not wait, -1 to wait indefinitely timeout) Polls a connecting socket to test if the connection has been established.
pack-priv static boolean	Returns: true if connected pollConnectNow(FileDescriptor fd) Performs a non-blocking poll of a connecting socket to test if the connection has been established.
pack-priv static native short	pollconnValue()
pack-priv static native short	pollerrValue()
pack-priv static native short	pollhupValue()
pack-priv static native short	pollinValue()
pack-priv static int	Returns: the polled events or 0 if no events are polled pollNow(FileDescriptor fd, int events) Performs a non-blocking poll of a file descriptor.
pack-priv static native short	pollnvalValue()
pack-priv static native short	polloutValue()
pack-priv static InetSocketAddress	remoteAddress(FileDescriptor fd)
private static native InetAddress	remoteInetAddress(FileDescriptor fd)
private static native int	remotePort(FileDescriptor fd)
pack-priv static native int	sendOOB(FileDescriptor fd, byte data) Send one byte of urgent data (MSG_OOB) on the socket.
pack-priv static FileDescriptor	serverSocket()
pack-priv static FileDescriptor	serverSocket(ProtocolFamily family)
pack-priv static native void	setInterface4(FileDescriptor fd, int interf)
pack-priv static native void	setInterface6(FileDescriptor fd, int index)
private static native void	setIntOption0(FileDescriptor fd, boolean mayNeedConversion, int level, int opt, int arg, boolean isIPv6)
pack-priv static <T> void	setIpSocketOption(FileDescriptor fd, ProtocolFamily family, SocketOption<T> opt, T value) Sets a IPPROTO_IPV6/IPPROTO level socket.
pack-priv static void	setSocketOption(FileDescriptor fd, SocketOption<?> name, Object value)
pack-priv static void	setSocketOption(FileDescriptor fd, ProtocolFamily family, SocketOption<?> name, Object value)
private static AssertionError	shouldNotReachHere()
pack-priv static boolean	shouldSetBothIPv4AndIPv6Options() Tells whether both IPV6_XXX and IP_XXX socket options should be set on IPv6 sockets.
private static native boolean	shouldSetBothIPv4AndIPv6Options0()
pack-priv static boolean	shouldShutdownWriteBeforeClose() Tells whether a TCP connection should be shutdown for writing before closing.
private static native boolean	shouldShutdownWriteBeforeClose0()
pack-priv static native void	shutdown(FileDescriptor fd, int how)
pack-priv static FileDescriptor	socket()
pack-priv static FileDescriptor	socket(ProtocolFamily family, boolean stream)
private static native int	socket0(boolean preferIPv6, boolean stream, boolean reuse, boolean fastLoopback)
pack-priv static void	translateException(Exception x)
pack-priv static void	translateToSocketException(Exception x)
pack-priv static void	unblock4(FileDescriptor fd, int group, int interf, int source) Unblock IPv4 source
pack-priv static void	unblock6(FileDescriptor fd, byte[] group, int index, byte[] source) Unblock IPv6 source
pack-priv static boolean	useExclusiveBind() Returns true if exclusive binding is on

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

ANY_LOCAL_INET4ADDRESS	back to summary
private static final InetAddress ANY_LOCAL_INET4ADDRESS

ANY_LOCAL_INET6ADDRESS	back to summary
private static final InetAddress ANY_LOCAL_INET6ADDRESS

EXCLUSIVE_BIND	back to summary
private static final boolean EXCLUSIVE_BIND

EXTENDED_OPTIONS	back to summary
pack-priv static final ExtendedSocketOptions EXTENDED_OPTIONS

FAST_LOOPBACK	back to summary
private static final boolean FAST_LOOPBACK

INET4_LOOPBACK_ADDRESS	back to summary
private static final InetAddress INET4_LOOPBACK_ADDRESS

INET6_LOOPBACK_ADDRESS	back to summary
private static final InetAddress INET6_LOOPBACK_ADDRESS

IPV6_AVAILABLE	back to summary
private static final boolean IPV6_AVAILABLE

POLLCONN	back to summary
public static final short POLLCONN

POLLERR	back to summary
public static final short POLLERR

POLLHUP	back to summary
public static final short POLLHUP

POLLIN	back to summary
public static final short POLLIN Event masks for the various poll system calls. They will be set platform dependent in the static initializer below.

POLLNVAL	back to summary
public static final short POLLNVAL

POLLOUT	back to summary
public static final short POLLOUT

SHUT_RD	back to summary
public static final int SHUT_RD

SHUT_RDWR	back to summary
public static final int SHUT_RDWR

SHUT_WR	back to summary
public static final int SHUT_WR

SHUTDOWN_WRITE_BEFORE_CLOSE	back to summary
private static final LazyConstant<Boolean> SHUTDOWN_WRITE_BEFORE_CLOSE

SO_REUSEPORT_AVAILABLE	back to summary
private static final boolean SO_REUSEPORT_AVAILABLE

UNSPEC	back to summary
pack-priv static final ProtocolFamily UNSPEC

Net	back to summary
private Net()

Method Detail

accept	back to summary
public static native int accept(FileDescriptor fd, FileDescriptor newfd, InetSocketAddress[] isaa) throws IOException

anyInet4Address	back to summary
pack-priv static Inet4Address anyInet4Address(final NetworkInterface interf) Returns any IPv4 address of the given network interface, or null if the interface does not have any IPv4 addresses.

anyLocalAddress back to summary

anyLocalAddress	back to summary
pack-priv static InetAddress anyLocalAddress(ProtocolFamily family) Returns the wildcard address that corresponds to the given protocol family. See Also `InetAddress#isAnyLocalAddress()`

pack-priv static InetAddress anyLocalAddress(ProtocolFamily family)

Returns the wildcard address that corresponds to the given protocol family.

See Also: InetAddress#isAnyLocalAddress()

asInetSocketAddress	back to summary
pack-priv static InetSocketAddress asInetSocketAddress(SocketAddress sa)

available	back to summary
pack-priv static native int available(FileDescriptor fd) throws IOException Return the number of bytes in the socket input buffer.

bind	back to summary
public static void bind(FileDescriptor fd, InetAddress addr, int port) throws IOException

bind	back to summary
pack-priv static void bind(ProtocolFamily family, FileDescriptor fd, InetAddress addr, int port) throws IOException

bind0	back to summary
private static native void bind0(FileDescriptor fd, boolean preferIPv6, boolean useExclBind, InetAddress addr, int port) throws IOException

block4	back to summary
pack-priv static int block4(FileDescriptor fd, int group, int interf, int source) throws IOException Block IPv4 source

block6	back to summary
pack-priv static int block6(FileDescriptor fd, byte[] group, int index, byte[] source) throws IOException Block IPv6 source

blockOrUnblock4	back to summary
private static native int blockOrUnblock4(boolean block, FileDescriptor fd, int group, int interf, int source) throws IOException

blockOrUnblock6	back to summary
pack-priv static native int blockOrUnblock6(boolean block, FileDescriptor fd, byte[] group, int index, byte[] source) throws IOException

canIPv6SocketJoinIPv4Group	back to summary
pack-priv static boolean canIPv6SocketJoinIPv4Group() Tells whether IPv6 sockets can join IPv4 multicast groups

canIPv6SocketJoinIPv4Group0	back to summary
private static native boolean canIPv6SocketJoinIPv4Group0()

canJoin6WithIPv4Group	back to summary
pack-priv static boolean canJoin6WithIPv4Group() Tells whether `join6` can be used to join an IPv4 multicast group (IPv4 group as IPv4-mapped IPv6 address)

canJoin6WithIPv4Group0	back to summary
private static native boolean canJoin6WithIPv4Group0()

canUseIPv6OptionsWithIPv4LocalAddress	back to summary
pack-priv static boolean canUseIPv6OptionsWithIPv4LocalAddress() Tells whether IPV6_XXX socket options should be used on an IPv6 socket that is bound to an IPv4 address.

canUseIPv6OptionsWithIPv4LocalAddress0	back to summary
private static native boolean canUseIPv6OptionsWithIPv4LocalAddress0()

checkAddress	back to summary
public static InetSocketAddress checkAddress(SocketAddress sa)

checkAddress	back to summary
pack-priv static InetSocketAddress checkAddress(SocketAddress sa, ProtocolFamily family)

connect	back to summary
pack-priv static int connect(FileDescriptor fd, InetAddress remote, int remotePort) throws IOException

connect	back to summary
pack-priv static int connect(ProtocolFamily family, FileDescriptor fd, InetAddress remote, int remotePort) throws IOException

connect	back to summary
pack-priv static int connect(ProtocolFamily family, FileDescriptor fd, SocketAddress remote) throws IOException

connect0	back to summary
private static native int connect0(boolean preferIPv6, FileDescriptor fd, InetAddress remote, int remotePort) throws IOException

discardOOB	back to summary
pack-priv static native boolean discardOOB(FileDescriptor fd) throws IOException Read and discard urgent data (MSG_OOB) on the socket.

drop4	back to summary
pack-priv static void drop4(FileDescriptor fd, int group, int interf, int source) throws IOException Drop membership of IPv4 multicast group

drop6	back to summary
pack-priv static void drop6(FileDescriptor fd, byte[] group, int index, byte[] source) throws IOException Drop membership of IPv6 multicast group

getInterface4	back to summary
pack-priv static native int getInterface4(FileDescriptor fd) throws IOException

getInterface6	back to summary
pack-priv static native int getInterface6(FileDescriptor fd) throws IOException

getIntOption0	back to summary
private static native int getIntOption0(FileDescriptor fd, boolean mayNeedConversion, int level, int opt) throws IOException

getSocketOption	back to summary
pack-priv static Object getSocketOption(FileDescriptor fd, SocketOption<?> name) throws IOException

getSocketOption	back to summary
pack-priv static Object getSocketOption(FileDescriptor fd, ProtocolFamily family, SocketOption<?> name) throws IOException

inet4AsInt	back to summary
pack-priv static int inet4AsInt(InetAddress ia) Returns an IPv4 address as an int.

inet4FromInt	back to summary
pack-priv static InetAddress inet4FromInt(int address) Returns an InetAddress from the given IPv4 address represented as an int.

inet4LoopbackAddress	back to summary
pack-priv static InetAddress inet4LoopbackAddress()

inet6AsByteArray	back to summary
pack-priv static byte[] inet6AsByteArray(InetAddress ia) Returns an IPv6 address as a byte array

inet6LoopbackAddress	back to summary
pack-priv static InetAddress inet6LoopbackAddress()

initIDs	back to summary
private static native void initIDs()

isExclusiveBindAvailable	back to summary
private static native int isExclusiveBindAvailable()

isFastTcpLoopbackRequested	back to summary
private static boolean isFastTcpLoopbackRequested()

isIPv6Available	back to summary
pack-priv static boolean isIPv6Available() Tells whether dual-IPv4/IPv6 sockets should be used.

isIPv6Available0	back to summary
private static native boolean isIPv6Available0()

isReusePortAvailable	back to summary
pack-priv static boolean isReusePortAvailable() Tells whether SO_REUSEPORT is supported.

isReusePortAvailable0	back to summary
private static native boolean isReusePortAvailable0()

join4	back to summary
pack-priv static int join4(FileDescriptor fd, int group, int interf, int source) throws IOException Join IPv4 multicast group

join6	back to summary
pack-priv static int join6(FileDescriptor fd, byte[] group, int index, byte[] source) throws IOException Join IPv6 multicast group

joinOrDrop4	back to summary
private static native int joinOrDrop4(boolean join, FileDescriptor fd, int group, int interf, int source) throws IOException

joinOrDrop6	back to summary
private static native int joinOrDrop6(boolean join, FileDescriptor fd, byte[] group, int index, byte[] source) throws IOException

listen	back to summary
pack-priv static native void listen(FileDescriptor fd, int backlog) throws IOException

localAddress	back to summary
public static InetSocketAddress localAddress(FileDescriptor fd) throws IOException

localInetAddress	back to summary
private static native InetAddress localInetAddress(FileDescriptor fd) throws IOException

localPort	back to summary
private static native int localPort(FileDescriptor fd) throws IOException

newSocketException	back to summary
private static SocketException newSocketException(String msg)

poll

back to summary

pack-priv static native int poll(FileDescriptor fd, int events, long timeout) throws IOException

Polls a file descriptor for events.

Parameters

timeout:long: the timeout to wait; 0 to not wait, -1 to wait indefinitely

Returns:int

the polled events or 0 if no events are polled

pollConnect

back to summary

public static native boolean pollConnect(FileDescriptor fd, long timeout) throws IOException

Polls a connecting socket to test if the connection has been established.

API Note

This method is public to allow it to be used by code in jdk.sctp.

Parameters

timeout:long: the timeout to wait; 0 to not wait, -1 to wait indefinitely

Returns:boolean

true if connected

pollConnectNow

back to summary

pack-priv static boolean pollConnectNow(FileDescriptor fd) throws IOException

Performs a non-blocking poll of a connecting socket to test if the connection has been established.

Returns:boolean: true if connected

pollconnValue	back to summary
pack-priv static native short pollconnValue()

pollerrValue	back to summary
pack-priv static native short pollerrValue()

pollhupValue	back to summary
pack-priv static native short pollhupValue()

pollinValue	back to summary
pack-priv static native short pollinValue()

pollNow

back to summary

pack-priv static int pollNow(FileDescriptor fd, int events) throws IOException

Performs a non-blocking poll of a file descriptor.

Returns:int: the polled events or 0 if no events are polled

pollnvalValue	back to summary
pack-priv static native short pollnvalValue()

polloutValue	back to summary
pack-priv static native short polloutValue()

remoteAddress	back to summary
pack-priv static InetSocketAddress remoteAddress(FileDescriptor fd) throws IOException

remoteInetAddress	back to summary
private static native InetAddress remoteInetAddress(FileDescriptor fd) throws IOException

remotePort	back to summary
private static native int remotePort(FileDescriptor fd) throws IOException

sendOOB	back to summary
pack-priv static native int sendOOB(FileDescriptor fd, byte data) throws IOException Send one byte of urgent data (MSG_OOB) on the socket.

serverSocket	back to summary
pack-priv static FileDescriptor serverSocket()

serverSocket	back to summary
pack-priv static FileDescriptor serverSocket(ProtocolFamily family)

setInterface4	back to summary
pack-priv static native void setInterface4(FileDescriptor fd, int interf) throws IOException

setInterface6	back to summary
pack-priv static native void setInterface6(FileDescriptor fd, int index) throws IOException

setIntOption0	back to summary
private static native void setIntOption0(FileDescriptor fd, boolean mayNeedConversion, int level, int opt, int arg, boolean isIPv6) throws IOException

setIpSocketOption	back to summary
pack-priv static <T> void setIpSocketOption(FileDescriptor fd, ProtocolFamily family, SocketOption<T> opt, T value) throws IOException Sets a IPPROTO_IPV6/IPPROTO level socket. Some platforms require both IPPROTO_IPV6 and IPPROTO socket options to be set when the socket is IPv6. In that case, the IPPROTO socket option is set on a best effort basis.

setSocketOption	back to summary
pack-priv static void setSocketOption(FileDescriptor fd, SocketOption<?> name, Object value) throws IOException

setSocketOption	back to summary
pack-priv static void setSocketOption(FileDescriptor fd, ProtocolFamily family, SocketOption<?> name, Object value) throws IOException

shouldNotReachHere	back to summary
private static AssertionError shouldNotReachHere()

shouldSetBothIPv4AndIPv6Options	back to summary
pack-priv static boolean shouldSetBothIPv4AndIPv6Options() Tells whether both IPV6_XXX and IP_XXX socket options should be set on IPv6 sockets. On some kernels, both IPV6_XXX and IP_XXX socket options need to be set so that the settings are effective for IPv4 connections and datagrams.

shouldSetBothIPv4AndIPv6Options0	back to summary
private static native boolean shouldSetBothIPv4AndIPv6Options0()

shouldShutdownWriteBeforeClose	back to summary
pack-priv static boolean shouldShutdownWriteBeforeClose() Tells whether a TCP connection should be shutdown for writing before closing.

shouldShutdownWriteBeforeClose0	back to summary
private static native boolean shouldShutdownWriteBeforeClose0()

shutdown	back to summary
pack-priv static native void shutdown(FileDescriptor fd, int how) throws IOException

socket	back to summary
pack-priv static FileDescriptor socket() throws IOException

socket	back to summary
pack-priv static FileDescriptor socket(ProtocolFamily family, boolean stream) throws IOException

socket0	back to summary
private static native int socket0(boolean preferIPv6, boolean stream, boolean reuse, boolean fastLoopback)

translateException	back to summary
pack-priv static void translateException(Exception x) throws IOException

translateToSocketException	back to summary
pack-priv static void translateToSocketException(Exception x) throws SocketException

unblock4	back to summary
pack-priv static void unblock4(FileDescriptor fd, int group, int interf, int source) throws IOException Unblock IPv4 source

unblock6	back to summary
pack-priv static void unblock6(FileDescriptor fd, byte[] group, int index, byte[] source) throws IOException Unblock IPv6 source

useExclusiveBind	back to summary
pack-priv static boolean useExclusiveBind() Returns true if exclusive binding is on

public Class Net

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail