| /* |
| * Copyright (c) 2020, 2021, 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.FileDescriptor; |
| import java.io.IOException; |
| import java.net.BindException; |
| import java.net.NetPermission; |
| import java.net.SocketAddress; |
| import java.net.UnixDomainSocketAddress; |
| import java.nio.channels.UnsupportedAddressTypeException; |
| import java.nio.file.FileSystems; |
| import java.nio.file.InvalidPathException; |
| import java.nio.file.Path; |
| import java.nio.file.spi.FileSystemProvider; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.SecureRandom; |
| import java.util.Random; |
| import sun.nio.fs.AbstractFileSystemProvider; |
| |
| class UnixDomainSockets { |
| private UnixDomainSockets() { } |
| |
| static final UnixDomainSocketAddress UNNAMED = UnixDomainSocketAddress.of(""); |
| |
| private static final boolean supported; |
| |
| private static final String tempDir = UnixDomainSocketsUtil.getTempDir(); |
| |
| private static final NetPermission accessUnixDomainSocket = |
| new NetPermission("accessUnixDomainSocket"); |
| |
| static boolean isSupported() { |
| return supported; |
| } |
| |
| static void checkPermission() { |
| @SuppressWarnings("removal") |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) |
| sm.checkPermission(accessUnixDomainSocket); |
| } |
| |
| static UnixDomainSocketAddress getRevealedLocalAddress(SocketAddress sa) { |
| UnixDomainSocketAddress addr = (UnixDomainSocketAddress) sa; |
| try { |
| checkPermission(); |
| // Security check passed |
| } catch (SecurityException e) { |
| // Return unnamed address only if security check fails |
| addr = UNNAMED; |
| } |
| return addr; |
| } |
| |
| static UnixDomainSocketAddress localAddress(FileDescriptor fd) throws IOException { |
| String path = new String(localAddress0(fd), UnixDomainSocketsUtil.getCharset()); |
| return UnixDomainSocketAddress.of(path); |
| } |
| |
| private static native byte[] localAddress0(FileDescriptor fd) throws IOException; |
| |
| @SuppressWarnings("removal") |
| static String getRevealedLocalAddressAsString(SocketAddress sa) { |
| return (System.getSecurityManager() != null) ? sa.toString() : ""; |
| } |
| |
| static UnixDomainSocketAddress checkAddress(SocketAddress sa) { |
| if (sa == null) |
| throw new NullPointerException(); |
| if (!(sa instanceof UnixDomainSocketAddress)) |
| throw new UnsupportedAddressTypeException(); |
| return (UnixDomainSocketAddress) sa; |
| } |
| |
| static byte[] getPathBytes(Path path) { |
| FileSystemProvider provider = FileSystems.getDefault().provider(); |
| return ((AbstractFileSystemProvider) provider).getSunPathForSocketFile(path); |
| } |
| |
| static FileDescriptor socket() throws IOException { |
| return IOUtil.newFD(socket0()); |
| } |
| |
| static void bind(FileDescriptor fd, Path addr) throws IOException { |
| byte[] path = getPathBytes(addr); |
| if (path.length == 0) { |
| throw new BindException("Server socket cannot bind to unnamed address"); |
| } |
| bind0(fd, path); |
| } |
| |
| private static Random getRandom() { |
| try { |
| return SecureRandom.getInstance("NativePRNGNonBlocking"); |
| } catch (NoSuchAlgorithmException e) { |
| return new SecureRandom(); // This should not fail |
| } |
| } |
| |
| private static final Random random = getRandom(); |
| |
| /** |
| * Return a possible temporary name to bind to, which is different for each call |
| * Name is of the form <temp dir>/socket_<random> |
| */ |
| static UnixDomainSocketAddress generateTempName() throws IOException { |
| String dir = UnixDomainSockets.tempDir; |
| if (dir == null) |
| throw new BindException("Could not locate temporary directory for sockets"); |
| int rnd = random.nextInt(Integer.MAX_VALUE); |
| try { |
| Path path = Path.of(dir, "socket_" + rnd); |
| return UnixDomainSocketAddress.of(path); |
| } catch (InvalidPathException e) { |
| throw new BindException("Invalid temporary directory"); |
| } |
| } |
| |
| static int connect(FileDescriptor fd, SocketAddress sa) throws IOException { |
| return UnixDomainSockets.connect(fd, ((UnixDomainSocketAddress) sa).getPath()); |
| } |
| |
| static int connect(FileDescriptor fd, Path path) throws IOException { |
| return connect0(fd, getPathBytes(path)); |
| } |
| |
| static int accept(FileDescriptor fd, FileDescriptor newfd, String[] paths) |
| throws IOException |
| { |
| Object[] array = new Object[1]; |
| int n = accept0(fd, newfd, array); |
| if (n > 0) { |
| byte[] bytes = (byte[]) array[0]; |
| paths[0] = new String(bytes, UnixDomainSocketsUtil.getCharset()); |
| } |
| return n; |
| } |
| |
| private static native boolean socketSupported(); |
| |
| private static native int socket0() throws IOException; |
| |
| private static native void bind0(FileDescriptor fd, byte[] path) |
| throws IOException; |
| |
| private static native int connect0(FileDescriptor fd, byte[] path) |
| throws IOException; |
| |
| private static native int accept0(FileDescriptor fd, FileDescriptor newfd, Object[] array) |
| throws IOException; |
| |
| static { |
| // Load all required native libs |
| IOUtil.load(); |
| supported = socketSupported(); |
| } |
| } |