1/*
2 * Copyright (c) 2007, 2016, 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 */
25package java.net;
26
27import java.io.IOException;
28import java.io.FileDescriptor;
29import java.util.Set;
30import java.util.HashSet;
31import sun.net.ext.ExtendedSocketOptions;
32
33/*
34 * On Unix systems we simply delegate to native methods.
35 *
36 * @author Chris Hegarty
37 */
38
39class PlainSocketImpl extends AbstractPlainSocketImpl
40{
41    static {
42        initProto();
43    }
44
45    /**
46     * Constructs an empty instance.
47     */
48    PlainSocketImpl() { }
49
50    /**
51     * Constructs an instance with the given file descriptor.
52     */
53    PlainSocketImpl(FileDescriptor fd) {
54        this.fd = fd;
55    }
56
57    static final ExtendedSocketOptions extendedOptions =
58            ExtendedSocketOptions.getInstance();
59
60    protected <T> void setOption(SocketOption<T> name, T value) throws IOException {
61        if (!extendedOptions.isOptionSupported(name)) {
62            if (!name.equals(StandardSocketOptions.SO_REUSEPORT)) {
63                super.setOption(name, value);
64            } else {
65                if (supportedOptions().contains(name)) {
66                    super.setOption(name, value);
67                } else {
68                    throw new UnsupportedOperationException("unsupported option");
69                }
70            }
71        } else {
72            if (getSocket() == null) {
73                throw new UnsupportedOperationException("unsupported option");
74            }
75            if (isClosedOrPending()) {
76                throw new SocketException("Socket closed");
77            }
78            extendedOptions.setOption(fd, name, value);
79        }
80    }
81
82    @SuppressWarnings("unchecked")
83    protected <T> T getOption(SocketOption<T> name) throws IOException {
84        if (!extendedOptions.isOptionSupported(name)) {
85            if (!name.equals(StandardSocketOptions.SO_REUSEPORT)) {
86                return super.getOption(name);
87            } else {
88                if (supportedOptions().contains(name)) {
89                    return super.getOption(name);
90                } else {
91                    throw new UnsupportedOperationException("unsupported option");
92                }
93            }
94        } else {
95            if (getSocket() == null) {
96                throw new UnsupportedOperationException("unsupported option");
97            }
98            if (isClosedOrPending()) {
99                throw new SocketException("Socket closed");
100            }
101            return (T) extendedOptions.getOption(fd, name);
102        }
103    }
104
105    protected Set<SocketOption<?>> supportedOptions() {
106        HashSet<SocketOption<?>> options = new HashSet<>(super.supportedOptions());
107        if (getSocket() != null) {
108            options.addAll(extendedOptions.options());
109        }
110        return options;
111    }
112
113    protected void socketSetOption(int opt, boolean b, Object val) throws SocketException {
114        if (opt == SocketOptions.SO_REUSEPORT &&
115            !supportedOptions().contains(StandardSocketOptions.SO_REUSEPORT)) {
116            throw new UnsupportedOperationException("unsupported option");
117        }
118        try {
119            socketSetOption0(opt, b, val);
120        } catch (SocketException se) {
121            if (socket == null || !socket.isConnected())
122                throw se;
123        }
124    }
125
126    native void socketCreate(boolean isServer) throws IOException;
127
128    native void socketConnect(InetAddress address, int port, int timeout)
129        throws IOException;
130
131    native void socketBind(InetAddress address, int port)
132        throws IOException;
133
134    native void socketListen(int count) throws IOException;
135
136    native void socketAccept(SocketImpl s) throws IOException;
137
138    native int socketAvailable() throws IOException;
139
140    native void socketClose0(boolean useDeferredClose) throws IOException;
141
142    native void socketShutdown(int howto) throws IOException;
143
144    static native void initProto();
145
146    native void socketSetOption0(int cmd, boolean on, Object value)
147        throws SocketException;
148
149    native int socketGetOption(int opt, Object iaContainerObj) throws SocketException;
150
151    native void socketSendUrgentData(int data) throws IOException;
152}
153