--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/nio/ch/Net.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,652 @@
+/*
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.nio.ch;
+
+import java.io.*;
+import java.net.*;
+import java.nio.channels.*;
+import java.util.*;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import sun.net.ext.ExtendedSocketOptions;
+import sun.security.action.GetPropertyAction;
+
+public class Net {
+
+ private Net() { }
+
+ // unspecified protocol family
+ static final ProtocolFamily UNSPEC = new ProtocolFamily() {
+ public String name() {
+ return "UNSPEC";
+ }
+ };
+
+ // set to true if exclusive binding is on for Windows
+ private static final boolean exclusiveBind;
+
+ // set to true if the fast tcp loopback should be enabled on Windows
+ private static final boolean fastLoopback;
+
+ // -- Miscellaneous utilities --
+
+ private static volatile boolean checkedIPv6;
+ private static volatile boolean isIPv6Available;
+ private static volatile boolean checkedReusePort;
+ private static volatile boolean isReusePortAvailable;
+
+ /**
+ * Tells whether dual-IPv4/IPv6 sockets should be used.
+ */
+ static boolean isIPv6Available() {
+ if (!checkedIPv6) {
+ isIPv6Available = isIPv6Available0();
+ checkedIPv6 = true;
+ }
+ return isIPv6Available;
+ }
+
+ /**
+ * Tells whether SO_REUSEPORT is supported.
+ */
+ static boolean isReusePortAvailable() {
+ if (!checkedReusePort) {
+ isReusePortAvailable = isReusePortAvailable0();
+ checkedReusePort = true;
+ }
+ return isReusePortAvailable;
+ }
+
+ /**
+ * Returns true if exclusive binding is on
+ */
+ static boolean useExclusiveBind() {
+ return exclusiveBind;
+ }
+
+ /**
+ * Tells whether IPv6 sockets can join IPv4 multicast groups
+ */
+ static boolean canIPv6SocketJoinIPv4Group() {
+ return canIPv6SocketJoinIPv4Group0();
+ }
+
+ /**
+ * Tells whether {@link #join6} can be used to join an IPv4
+ * multicast group (IPv4 group as IPv4-mapped IPv6 address)
+ */
+ static boolean canJoin6WithIPv4Group() {
+ return canJoin6WithIPv4Group0();
+ }
+
+ public static InetSocketAddress checkAddress(SocketAddress sa) {
+ if (sa == null)
+ throw new NullPointerException();
+ if (!(sa instanceof InetSocketAddress))
+ throw new UnsupportedAddressTypeException(); // ## needs arg
+ InetSocketAddress isa = (InetSocketAddress)sa;
+ if (isa.isUnresolved())
+ throw new UnresolvedAddressException(); // ## needs arg
+ InetAddress addr = isa.getAddress();
+ if (!(addr instanceof Inet4Address || addr instanceof Inet6Address))
+ throw new IllegalArgumentException("Invalid address type");
+ return isa;
+ }
+
+ static InetSocketAddress asInetSocketAddress(SocketAddress sa) {
+ if (!(sa instanceof InetSocketAddress))
+ throw new UnsupportedAddressTypeException();
+ return (InetSocketAddress)sa;
+ }
+
+ static void translateToSocketException(Exception x)
+ throws SocketException
+ {
+ if (x instanceof SocketException)
+ throw (SocketException)x;
+ Exception nx = x;
+ if (x instanceof ClosedChannelException)
+ nx = new SocketException("Socket is closed");
+ else if (x instanceof NotYetConnectedException)
+ nx = new SocketException("Socket is not connected");
+ else if (x instanceof AlreadyBoundException)
+ nx = new SocketException("Already bound");
+ else if (x instanceof NotYetBoundException)
+ nx = new SocketException("Socket is not bound yet");
+ else if (x instanceof UnsupportedAddressTypeException)
+ nx = new SocketException("Unsupported address type");
+ else if (x instanceof UnresolvedAddressException) {
+ nx = new SocketException("Unresolved address");
+ }
+ if (nx != x)
+ nx.initCause(x);
+
+ if (nx instanceof SocketException)
+ throw (SocketException)nx;
+ else if (nx instanceof RuntimeException)
+ throw (RuntimeException)nx;
+ else
+ throw new Error("Untranslated exception", nx);
+ }
+
+ static void translateException(Exception x,
+ boolean unknownHostForUnresolved)
+ throws IOException
+ {
+ if (x instanceof IOException)
+ throw (IOException)x;
+ // Throw UnknownHostException from here since it cannot
+ // be thrown as a SocketException
+ if (unknownHostForUnresolved &&
+ (x instanceof UnresolvedAddressException))
+ {
+ throw new UnknownHostException();
+ }
+ translateToSocketException(x);
+ }
+
+ static void translateException(Exception x)
+ throws IOException
+ {
+ translateException(x, false);
+ }
+
+ /**
+ * Returns the local address after performing a SecurityManager#checkConnect.
+ */
+ static InetSocketAddress getRevealedLocalAddress(InetSocketAddress addr) {
+ SecurityManager sm = System.getSecurityManager();
+ if (addr == null || sm == null)
+ return addr;
+
+ try{
+ sm.checkConnect(addr.getAddress().getHostAddress(), -1);
+ // Security check passed
+ } catch (SecurityException e) {
+ // Return loopback address only if security check fails
+ addr = getLoopbackAddress(addr.getPort());
+ }
+ return addr;
+ }
+
+ static String getRevealedLocalAddressAsString(InetSocketAddress addr) {
+ return System.getSecurityManager() == null ? addr.toString() :
+ getLoopbackAddress(addr.getPort()).toString();
+ }
+
+ private static InetSocketAddress getLoopbackAddress(int port) {
+ return new InetSocketAddress(InetAddress.getLoopbackAddress(),
+ port);
+ }
+
+ /**
+ * Returns any IPv4 address of the given network interface, or
+ * null if the interface does not have any IPv4 addresses.
+ */
+ static Inet4Address anyInet4Address(final NetworkInterface interf) {
+ return AccessController.doPrivileged(new PrivilegedAction<Inet4Address>() {
+ public Inet4Address run() {
+ Enumeration<InetAddress> addrs = interf.getInetAddresses();
+ while (addrs.hasMoreElements()) {
+ InetAddress addr = addrs.nextElement();
+ if (addr instanceof Inet4Address) {
+ return (Inet4Address)addr;
+ }
+ }
+ return null;
+ }
+ });
+ }
+
+ /**
+ * Returns an IPv4 address as an int.
+ */
+ static int inet4AsInt(InetAddress ia) {
+ if (ia instanceof Inet4Address) {
+ byte[] addr = ia.getAddress();
+ int address = addr[3] & 0xFF;
+ address |= ((addr[2] << 8) & 0xFF00);
+ address |= ((addr[1] << 16) & 0xFF0000);
+ address |= ((addr[0] << 24) & 0xFF000000);
+ return address;
+ }
+ throw new AssertionError("Should not reach here");
+ }
+
+ /**
+ * Returns an InetAddress from the given IPv4 address
+ * represented as an int.
+ */
+ static InetAddress inet4FromInt(int address) {
+ byte[] addr = new byte[4];
+ addr[0] = (byte) ((address >>> 24) & 0xFF);
+ addr[1] = (byte) ((address >>> 16) & 0xFF);
+ addr[2] = (byte) ((address >>> 8) & 0xFF);
+ addr[3] = (byte) (address & 0xFF);
+ try {
+ return InetAddress.getByAddress(addr);
+ } catch (UnknownHostException uhe) {
+ throw new AssertionError("Should not reach here");
+ }
+ }
+
+ /**
+ * Returns an IPv6 address as a byte array
+ */
+ static byte[] inet6AsByteArray(InetAddress ia) {
+ if (ia instanceof Inet6Address) {
+ return ia.getAddress();
+ }
+
+ // need to construct IPv4-mapped address
+ if (ia instanceof Inet4Address) {
+ byte[] ip4address = ia.getAddress();
+ byte[] address = new byte[16];
+ address[10] = (byte)0xff;
+ address[11] = (byte)0xff;
+ address[12] = ip4address[0];
+ address[13] = ip4address[1];
+ address[14] = ip4address[2];
+ address[15] = ip4address[3];
+ return address;
+ }
+
+ throw new AssertionError("Should not reach here");
+ }
+
+ // -- Socket options
+
+ static final ExtendedSocketOptions extendedOptions =
+ ExtendedSocketOptions.getInstance();
+
+ static void setSocketOption(FileDescriptor fd, ProtocolFamily family,
+ SocketOption<?> name, Object value)
+ throws IOException
+ {
+ if (value == null)
+ throw new IllegalArgumentException("Invalid option value");
+
+ // only simple values supported by this method
+ Class<?> type = name.type();
+
+ if (extendedOptions.isOptionSupported(name)) {
+ extendedOptions.setOption(fd, name, value);
+ return;
+ }
+
+ if (type != Integer.class && type != Boolean.class)
+ throw new AssertionError("Should not reach here");
+
+ // special handling
+ if (name == StandardSocketOptions.SO_RCVBUF ||
+ name == StandardSocketOptions.SO_SNDBUF)
+ {
+ int i = ((Integer)value).intValue();
+ if (i < 0)
+ throw new IllegalArgumentException("Invalid send/receive buffer size");
+ }
+ if (name == StandardSocketOptions.SO_LINGER) {
+ int i = ((Integer)value).intValue();
+ if (i < 0)
+ value = Integer.valueOf(-1);
+ if (i > 65535)
+ value = Integer.valueOf(65535);
+ }
+ if (name == StandardSocketOptions.IP_TOS) {
+ int i = ((Integer)value).intValue();
+ if (i < 0 || i > 255)
+ throw new IllegalArgumentException("Invalid IP_TOS value");
+ }
+ if (name == StandardSocketOptions.IP_MULTICAST_TTL) {
+ int i = ((Integer)value).intValue();
+ if (i < 0 || i > 255)
+ throw new IllegalArgumentException("Invalid TTL/hop value");
+ }
+
+ // map option name to platform level/name
+ OptionKey key = SocketOptionRegistry.findOption(name, family);
+ if (key == null)
+ throw new AssertionError("Option not found");
+
+ int arg;
+ if (type == Integer.class) {
+ arg = ((Integer)value).intValue();
+ } else {
+ boolean b = ((Boolean)value).booleanValue();
+ arg = (b) ? 1 : 0;
+ }
+
+ boolean mayNeedConversion = (family == UNSPEC);
+ boolean isIPv6 = (family == StandardProtocolFamily.INET6);
+ setIntOption0(fd, mayNeedConversion, key.level(), key.name(), arg, isIPv6);
+ }
+
+ static Object getSocketOption(FileDescriptor fd, ProtocolFamily family,
+ SocketOption<?> name)
+ throws IOException
+ {
+ Class<?> type = name.type();
+
+ if (extendedOptions.isOptionSupported(name)) {
+ return extendedOptions.getOption(fd, name);
+ }
+
+ // only simple values supported by this method
+ if (type != Integer.class && type != Boolean.class)
+ throw new AssertionError("Should not reach here");
+
+ // map option name to platform level/name
+ OptionKey key = SocketOptionRegistry.findOption(name, family);
+ if (key == null)
+ throw new AssertionError("Option not found");
+
+ boolean mayNeedConversion = (family == UNSPEC);
+ int value = getIntOption0(fd, mayNeedConversion, key.level(), key.name());
+
+ if (type == Integer.class) {
+ return Integer.valueOf(value);
+ } else {
+ return (value == 0) ? Boolean.FALSE : Boolean.TRUE;
+ }
+ }
+
+ public static boolean isFastTcpLoopbackRequested() {
+ String loopbackProp = GetPropertyAction
+ .privilegedGetProperty("jdk.net.useFastTcpLoopback");
+ boolean enable;
+ if ("".equals(loopbackProp)) {
+ enable = true;
+ } else {
+ enable = Boolean.parseBoolean(loopbackProp);
+ }
+ return enable;
+ }
+
+ // -- Socket operations --
+
+ private static native boolean isIPv6Available0();
+
+ private static native boolean isReusePortAvailable0();
+
+ /*
+ * Returns 1 for Windows and -1 for Solaris/Linux/Mac OS
+ */
+ private static native int isExclusiveBindAvailable();
+
+ private static native boolean canIPv6SocketJoinIPv4Group0();
+
+ private static native boolean canJoin6WithIPv4Group0();
+
+ static FileDescriptor socket(boolean stream) throws IOException {
+ return socket(UNSPEC, stream);
+ }
+
+ static FileDescriptor socket(ProtocolFamily family, boolean stream)
+ throws IOException {
+ boolean preferIPv6 = isIPv6Available() &&
+ (family != StandardProtocolFamily.INET);
+ return IOUtil.newFD(socket0(preferIPv6, stream, false, fastLoopback));
+ }
+
+ static FileDescriptor serverSocket(boolean stream) {
+ return IOUtil.newFD(socket0(isIPv6Available(), stream, true, fastLoopback));
+ }
+
+ // Due to oddities SO_REUSEADDR on windows reuse is ignored
+ private static native int socket0(boolean preferIPv6, boolean stream, boolean reuse,
+ boolean fastLoopback);
+
+ public static void bind(FileDescriptor fd, InetAddress addr, int port)
+ throws IOException
+ {
+ bind(UNSPEC, fd, addr, port);
+ }
+
+ static void bind(ProtocolFamily family, FileDescriptor fd,
+ InetAddress addr, int port) throws IOException
+ {
+ boolean preferIPv6 = isIPv6Available() &&
+ (family != StandardProtocolFamily.INET);
+ bind0(fd, preferIPv6, exclusiveBind, addr, port);
+ }
+
+ private static native void bind0(FileDescriptor fd, boolean preferIPv6,
+ boolean useExclBind, InetAddress addr,
+ int port)
+ throws IOException;
+
+ static native void listen(FileDescriptor fd, int backlog) throws IOException;
+
+ static int connect(FileDescriptor fd, InetAddress remote, int remotePort)
+ throws IOException
+ {
+ return connect(UNSPEC, fd, remote, remotePort);
+ }
+
+ static int connect(ProtocolFamily family, FileDescriptor fd, InetAddress remote, int remotePort)
+ throws IOException
+ {
+ boolean preferIPv6 = isIPv6Available() &&
+ (family != StandardProtocolFamily.INET);
+ return connect0(preferIPv6, fd, remote, remotePort);
+ }
+
+ private static native int connect0(boolean preferIPv6,
+ FileDescriptor fd,
+ InetAddress remote,
+ int remotePort)
+ throws IOException;
+
+
+ public static final int SHUT_RD = 0;
+ public static final int SHUT_WR = 1;
+ public static final int SHUT_RDWR = 2;
+
+ static native void shutdown(FileDescriptor fd, int how) throws IOException;
+
+ private static native int localPort(FileDescriptor fd)
+ throws IOException;
+
+ private static native InetAddress localInetAddress(FileDescriptor fd)
+ throws IOException;
+
+ public static InetSocketAddress localAddress(FileDescriptor fd)
+ throws IOException
+ {
+ return new InetSocketAddress(localInetAddress(fd), localPort(fd));
+ }
+
+ private static native int remotePort(FileDescriptor fd)
+ throws IOException;
+
+ private static native InetAddress remoteInetAddress(FileDescriptor fd)
+ throws IOException;
+
+ static InetSocketAddress remoteAddress(FileDescriptor fd)
+ throws IOException
+ {
+ return new InetSocketAddress(remoteInetAddress(fd), remotePort(fd));
+ }
+
+ private static native int getIntOption0(FileDescriptor fd, boolean mayNeedConversion,
+ int level, int opt)
+ throws IOException;
+
+ private static native void setIntOption0(FileDescriptor fd, boolean mayNeedConversion,
+ int level, int opt, int arg, boolean isIPv6)
+ throws IOException;
+
+ static native int poll(FileDescriptor fd, int events, long timeout)
+ throws IOException;
+
+ // -- Multicast support --
+
+
+ /**
+ * Join IPv4 multicast group
+ */
+ static int join4(FileDescriptor fd, int group, int interf, int source)
+ throws IOException
+ {
+ return joinOrDrop4(true, fd, group, interf, source);
+ }
+
+ /**
+ * Drop membership of IPv4 multicast group
+ */
+ static void drop4(FileDescriptor fd, int group, int interf, int source)
+ throws IOException
+ {
+ joinOrDrop4(false, fd, group, interf, source);
+ }
+
+ private static native int joinOrDrop4(boolean join, FileDescriptor fd, int group, int interf, int source)
+ throws IOException;
+
+ /**
+ * Block IPv4 source
+ */
+ static int block4(FileDescriptor fd, int group, int interf, int source)
+ throws IOException
+ {
+ return blockOrUnblock4(true, fd, group, interf, source);
+ }
+
+ /**
+ * Unblock IPv6 source
+ */
+ static void unblock4(FileDescriptor fd, int group, int interf, int source)
+ throws IOException
+ {
+ blockOrUnblock4(false, fd, group, interf, source);
+ }
+
+ private static native int blockOrUnblock4(boolean block, FileDescriptor fd, int group,
+ int interf, int source)
+ throws IOException;
+
+ /**
+ * Join IPv6 multicast group
+ */
+ static int join6(FileDescriptor fd, byte[] group, int index, byte[] source)
+ throws IOException
+ {
+ return joinOrDrop6(true, fd, group, index, source);
+ }
+
+ /**
+ * Drop membership of IPv6 multicast group
+ */
+ static void drop6(FileDescriptor fd, byte[] group, int index, byte[] source)
+ throws IOException
+ {
+ joinOrDrop6(false, fd, group, index, source);
+ }
+
+ private static native int joinOrDrop6(boolean join, FileDescriptor fd, byte[] group, int index, byte[] source)
+ throws IOException;
+
+ /**
+ * Block IPv6 source
+ */
+ static int block6(FileDescriptor fd, byte[] group, int index, byte[] source)
+ throws IOException
+ {
+ return blockOrUnblock6(true, fd, group, index, source);
+ }
+
+ /**
+ * Unblock IPv6 source
+ */
+ static void unblock6(FileDescriptor fd, byte[] group, int index, byte[] source)
+ throws IOException
+ {
+ blockOrUnblock6(false, fd, group, index, source);
+ }
+
+ static native int blockOrUnblock6(boolean block, FileDescriptor fd, byte[] group, int index, byte[] source)
+ throws IOException;
+
+ static native void setInterface4(FileDescriptor fd, int interf) throws IOException;
+
+ static native int getInterface4(FileDescriptor fd) throws IOException;
+
+ static native void setInterface6(FileDescriptor fd, int index) throws IOException;
+
+ static native int getInterface6(FileDescriptor fd) throws IOException;
+
+ private static native void initIDs();
+
+ /**
+ * Event masks for the various poll system calls.
+ * They will be set platform dependent in the static initializer below.
+ */
+ public static final short POLLIN;
+ public static final short POLLOUT;
+ public static final short POLLERR;
+ public static final short POLLHUP;
+ public static final short POLLNVAL;
+ public static final short POLLCONN;
+
+ static native short pollinValue();
+ static native short polloutValue();
+ static native short pollerrValue();
+ static native short pollhupValue();
+ static native short pollnvalValue();
+ static native short pollconnValue();
+
+ static {
+ IOUtil.load();
+ initIDs();
+
+ POLLIN = pollinValue();
+ POLLOUT = polloutValue();
+ POLLERR = pollerrValue();
+ POLLHUP = pollhupValue();
+ POLLNVAL = pollnvalValue();
+ POLLCONN = pollconnValue();
+ }
+
+ static {
+ int availLevel = isExclusiveBindAvailable();
+ if (availLevel >= 0) {
+ String exclBindProp = GetPropertyAction
+ .privilegedGetProperty("sun.net.useExclusiveBind");
+ if (exclBindProp != null) {
+ exclusiveBind = exclBindProp.isEmpty() ?
+ true : Boolean.parseBoolean(exclBindProp);
+ } else if (availLevel == 1) {
+ exclusiveBind = true;
+ } else {
+ exclusiveBind = false;
+ }
+ } else {
+ exclusiveBind = false;
+ }
+
+ fastLoopback = isFastTcpLoopbackRequested();
+ }
+}