1 /*
2 * Copyright (c) 2000, 2018, 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
26 package sun.nio.ch;
27
28 import java.io.IOException;
29 import java.net.InetAddress;
30 import java.net.InetSocketAddress;
31 import java.net.ServerSocket;
32 import java.net.Socket;
33 import java.net.SocketAddress;
34 import java.net.SocketException;
35 import java.net.SocketTimeoutException;
36 import java.net.StandardSocketOptions;
37 import java.nio.channels.ClosedChannelException;
38 import java.nio.channels.IllegalBlockingModeException;
39 import java.nio.channels.NotYetBoundException;
40 import java.nio.channels.ServerSocketChannel;
41 import java.nio.channels.SocketChannel;
42
43
44 // Make a server-socket channel look like a server socket.
45 //
46 // The methods in this class are defined in exactly the same order as in
47 // java.net.ServerSocket so as to simplify tracking future changes to that
48 // class.
49 //
50
51 class ServerSocketAdaptor // package-private
52 extends ServerSocket
53 {
54
55 // The channel being adapted
56 private final ServerSocketChannelImpl ssc;
57
58 // Timeout "option" value for accepts
59 private volatile int timeout;
60
61 public static ServerSocket create(ServerSocketChannelImpl ssc) {
62 try {
63 return new ServerSocketAdaptor(ssc);
64 } catch (IOException x) {
65 throw new Error(x);
66 }
67 }
68
69 // ## super will create a useless impl
70 private ServerSocketAdaptor(ServerSocketChannelImpl ssc)
71 throws IOException
72 {
73 this.ssc = ssc;
74 }
75
76
77 public void bind(SocketAddress local) throws IOException {
78 bind(local, 50);
79 }
80
81 public void bind(SocketAddress local, int backlog) throws IOException {
82 if (local == null)
83 local = new InetSocketAddress(0);
84 try {
85 ssc.bind(local, backlog);
86 } catch (Exception x) {
87 Net.translateException(x);
88 }
89 }
90
91 public InetAddress getInetAddress() {
92 if (!ssc.isBound())
93 return null;
94 return Net.getRevealedLocalAddress(ssc.localAddress()).getAddress();
95
96 }
97
98 public int getLocalPort() {
99 if (!ssc.isBound())
100 return -1;
101 return Net.asInetSocketAddress(ssc.localAddress()).getPort();
102 }
103
104
105 public Socket accept() throws IOException {
106 synchronized (ssc.blockingLock()) {
107 try {
108 if (!ssc.isBound())
109 throw new NotYetBoundException();
110
111 if (timeout == 0) {
112 // for compatibility reasons: accept connection if available
113 // when configured non-blocking
114 SocketChannel sc = ssc.accept();
115 if (sc == null && !ssc.isBlocking())
116 throw new IllegalBlockingModeException();
117 return sc.socket();
118 }
119
120 if (!ssc.isBlocking())
121 throw new IllegalBlockingModeException();
122 ssc.configureBlocking(false);
123 try {
124 SocketChannel sc;
125 if ((sc = ssc.accept()) != null)
126 return sc.socket();
127 long to = timeout;
128 for (;;) {
129 if (!ssc.isOpen())
130 throw new ClosedChannelException();
131 long st = System.currentTimeMillis();
132 int result = ssc.poll(Net.POLLIN, to);
133 if (result > 0 && ((sc = ssc.accept()) != null))
134 return sc.socket();
135 to -= System.currentTimeMillis() - st;
136 if (to <= 0)
137 throw new SocketTimeoutException();
138 }
139 } finally {
140 try {
141 ssc.configureBlocking(true);
142 } catch (ClosedChannelException e) { }
143 }
144 } catch (Exception x) {
145 Net.translateException(x);
146 assert false;
147 return null; // Never happens
148 }
149 }
150 }
151
152 public void close() throws IOException {
153 ssc.close();
154 }
155
156 public ServerSocketChannel getChannel() {
157 return ssc;
158 }
159
160 public boolean isBound() {
161 return ssc.isBound();
162 }
163
164 public boolean isClosed() {
165 return !ssc.isOpen();
166 }
167
168 public void setSoTimeout(int timeout) throws SocketException {
169 this.timeout = timeout;
170 }
171
172 public int getSoTimeout() throws SocketException {
173 return timeout;
174 }
175
176 public void setReuseAddress(boolean on) throws SocketException {
177 try {
178 ssc.setOption(StandardSocketOptions.SO_REUSEADDR, on);
179 } catch (IOException x) {
180 Net.translateToSocketException(x);
181 }
182 }
183
184 public boolean getReuseAddress() throws SocketException {
185 try {
186 return ssc.getOption(StandardSocketOptions.SO_REUSEADDR).booleanValue();
187 } catch (IOException x) {
188 Net.translateToSocketException(x);
189 return false; // Never happens
190 }
191 }
192
193 public String toString() {
194 if (!isBound())
195 return "ServerSocket[unbound]";
196 return "ServerSocket[addr=" + getInetAddress() +
197 ",localport=" + getLocalPort() + "]";
198 }
199
200 public void setReceiveBufferSize(int size) throws SocketException {
201 // size 0 valid for ServerSocketChannel, invalid for ServerSocket
202 if (size <= 0)
203 throw new IllegalArgumentException("size cannot be 0 or negative");
204 try {
205 ssc.setOption(StandardSocketOptions.SO_RCVBUF, size);
206 } catch (IOException x) {
207 Net.translateToSocketException(x);
208 }
209 }
210
211 public int getReceiveBufferSize() throws SocketException {
212 try {
213 return ssc.getOption(StandardSocketOptions.SO_RCVBUF).intValue();
214 } catch (IOException x) {
215 Net.translateToSocketException(x);
216 return -1; // Never happens
217 }
218 }
219
220 }