1 /* 2 * Copyright (c) 2007, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package java.net; 26 27 import java.io.IOException; 28 import java.io.FileDescriptor; 29 import java.util.Set; 30 import java.util.HashSet; 31 import sun.net.ext.ExtendedSocketOptions; 32 33 /* 34 * On Unix systems we simply delegate to native methods. 35 * 36 * @author Chris Hegarty 37 */ 38 39 class PlainSocketImpl extends AbstractPlainSocketImpl 40 { 41 static { 42 initProto(); 43 } 44 45 /** 46 * Constructs an empty instance. 47 */ 48 PlainSocketImpl(boolean isServer) { 49 super(isServer); 50 } 51 52 static final ExtendedSocketOptions extendedOptions = 53 ExtendedSocketOptions.getInstance(); 54 55 protected <T> void setOption(SocketOption<T> name, T value) throws IOException { 56 if (isClosedOrPending()) { 57 throw new SocketException("Socket closed"); 58 } 59 if (supportedOptions().contains(name)) { 60 if (extendedOptions.isOptionSupported(name)) { 61 extendedOptions.setOption(fd, name, value); 62 } else { 63 super.setOption(name, value); 64 } 65 } else { 66 throw new UnsupportedOperationException("unsupported option"); 67 } 68 } 69 70 @SuppressWarnings("unchecked") 71 protected <T> T getOption(SocketOption<T> name) throws IOException { 72 if (isClosedOrPending()) { 73 throw new SocketException("Socket closed"); 74 } 75 if (supportedOptions().contains(name)) { 76 if (extendedOptions.isOptionSupported(name)) { 77 return (T) extendedOptions.getOption(fd, name); 78 } else { 79 return super.getOption(name); 80 } 81 } else { 82 throw new UnsupportedOperationException("unsupported option"); 83 } 84 } 85 86 protected Set<SocketOption<?>> supportedOptions() { 87 HashSet<SocketOption<?>> options = new HashSet<>(super.supportedOptions()); 88 if (isServer) { 89 options.addAll(ExtendedSocketOptions.serverSocketOptions()); 90 } else { 91 options.addAll(ExtendedSocketOptions.clientSocketOptions()); 92 } 93 return options; 94 } 95 96 protected void socketSetOption(int opt, boolean b, Object val) throws SocketException { 97 if (opt == SocketOptions.SO_REUSEPORT && 98 !supportedOptions().contains(StandardSocketOptions.SO_REUSEPORT)) { 99 throw new UnsupportedOperationException("unsupported option"); 100 } 101 try { 102 socketSetOption0(opt, b, val); 103 } catch (SocketException se) { 104 if (!isConnected) 105 throw se; 106 } 107 } 108 109 void socketCreate(boolean stream) throws IOException { 110 socketCreate(stream, isServer); 111 } 112 113 native void socketCreate(boolean stream, boolean isServer) throws IOException; 114 115 native void socketConnect(InetAddress address, int port, int timeout) 116 throws IOException; 117 118 native void socketBind(InetAddress address, int port) 119 throws IOException; 120 121 native void socketListen(int count) throws IOException; 122 123 native void socketAccept(SocketImpl s) throws IOException; 124 125 native int socketAvailable() throws IOException; 126 127 native void socketClose0(boolean useDeferredClose) throws IOException; 128 129 native void socketShutdown(int howto) throws IOException; 130 131 static native void initProto(); 132 133 native void socketSetOption0(int cmd, boolean on, Object value) 134 throws SocketException; 135 136 native int socketGetOption(int opt, Object iaContainerObj) throws SocketException; 137 138 native void socketSendUrgentData(int data) throws IOException; 139 }