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| 1 | /* | ||
| 2 | * Copyright (c) 1995, 2008, 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 java.net; | ||
| 27 | |||
| 28 | import java.io.InputStream; | ||
| 29 | import java.io.OutputStream; | ||
| 30 | import java.io.IOException; | ||
| 31 | import java.io.InterruptedIOException; | ||
| 32 | import java.nio.channels.SocketChannel; | ||
| 33 | import java.security.AccessController; | ||
| 34 | import java.security.PrivilegedExceptionAction; | ||
| 35 | import java.security.PrivilegedAction; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * This class implements client sockets (also called just | ||
| 39 | * "sockets"). A socket is an endpoint for communication | ||
| 40 | * between two machines. | ||
| 41 | * <p> | ||
| 42 | * The actual work of the socket is performed by an instance of the | ||
| 43 | * <code>SocketImpl</code> class. An application, by changing | ||
| 44 | * the socket factory that creates the socket implementation, | ||
| 45 | * can configure itself to create sockets appropriate to the local | ||
| 46 | * firewall. | ||
| 47 | * | ||
| 48 | * @author unascribed | ||
| 49 | * @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) | ||
| 50 | * @see java.net.SocketImpl | ||
| 51 | * @see java.nio.channels.SocketChannel | ||
| 52 | * @since JDK1.0 | ||
| 53 | */ | ||
| 54 | public | ||
| 55 | class Socket implements java.io.Closeable { | ||
| 56 | /** | ||
| 57 | * Various states of this socket. | ||
| 58 | */ | ||
| 59 | private boolean created = false; | ||
| 60 | private boolean bound = false; | ||
| 61 | private boolean connected = false; | ||
| 62 | private boolean closed = false; | ||
| 63 | private Object closeLock = new Object(); | ||
| 64 | private boolean shutIn = false; | ||
| 65 | private boolean shutOut = false; | ||
| 66 | |||
| 67 | /** | ||
| 68 | * The implementation of this Socket. | ||
| 69 | */ | ||
| 70 | SocketImpl impl; | ||
| 71 | |||
| 72 | /** | ||
| 73 | * Are we using an older SocketImpl? | ||
| 74 | */ | ||
| 75 | private boolean oldImpl = false; | ||
| 76 | |||
| 77 | /** | ||
| 78 | * Creates an unconnected socket, with the | ||
| 79 | * system-default type of SocketImpl. | ||
| 80 | * | ||
| 81 | * @since JDK1.1 | ||
| 82 | * @revised 1.4 | ||
| 83 | */ | ||
| 84 | public Socket() { | ||
| 85 | setImpl(); | ||
| 86 | } | ||
| 87 | |||
| 88 | /** | ||
| 89 | * Creates an unconnected socket, specifying the type of proxy, if any, | ||
| 90 | * that should be used regardless of any other settings. | ||
| 91 | * <P> | ||
| 92 | * If there is a security manager, its <code>checkConnect</code> method | ||
| 93 | * is called with the proxy host address and port number | ||
| 94 | * as its arguments. This could result in a SecurityException. | ||
| 95 | * <P> | ||
| 96 | * Examples: | ||
| 97 | * <UL> <LI><code>Socket s = new Socket(Proxy.NO_PROXY);</code> will create | ||
| 98 | * a plain socket ignoring any other proxy configuration.</LI> | ||
| 99 | * <LI><code>Socket s = new Socket(new Proxy(Proxy.Type.SOCKS, new InetSocketAddress("socks.mydom.com", 1080)));</code> | ||
| 100 | * will create a socket connecting through the specified SOCKS proxy | ||
| 101 | * server.</LI> | ||
| 102 | * </UL> | ||
| 103 | * | ||
| 104 | * @param proxy a {@link java.net.Proxy Proxy} object specifying what kind | ||
| 105 | * of proxying should be used. | ||
| 106 | * @throws IllegalArgumentException if the proxy is of an invalid type | ||
| 107 | * or <code>null</code>. | ||
| 108 | * @throws SecurityException if a security manager is present and | ||
| 109 | * permission to connect to the proxy is | ||
| 110 | * denied. | ||
| 111 | * @see java.net.ProxySelector | ||
| 112 | * @see java.net.Proxy | ||
| 113 | * | ||
| 114 | * @since 1.5 | ||
| 115 | */ | ||
| 116 | public Socket(Proxy proxy) { | ||
| 117 | // Create a copy of Proxy as a security measure | ||
| 118 | if (proxy == null) { | ||
| 119 | throw new IllegalArgumentException("Invalid Proxy"); | ||
| 120 | } | ||
| 121 | Proxy p = proxy == Proxy.NO_PROXY ? Proxy.NO_PROXY : sun.net.ApplicationProxy.create(proxy); | ||
| 122 | if (p.type() == Proxy.Type.SOCKS) { | ||
| 123 | SecurityManager security = System.getSecurityManager(); | ||
| 124 | InetSocketAddress epoint = (InetSocketAddress) p.address(); | ||
| 125 | if (epoint.getAddress() != null) { | ||
| 126 | checkAddress (epoint.getAddress(), "Socket"); | ||
| 127 | } | ||
| 128 | if (security != null) { | ||
| 129 | if (epoint.isUnresolved()) | ||
| 130 | epoint = new InetSocketAddress(epoint.getHostName(), epoint.getPort()); | ||
| 131 | if (epoint.isUnresolved()) | ||
| 132 | security.checkConnect(epoint.getHostName(), epoint.getPort()); | ||
| 133 | else | ||
| 134 | security.checkConnect(epoint.getAddress().getHostAddress(), | ||
| 135 | epoint.getPort()); | ||
| 136 | } | ||
| 137 | impl = new SocksSocketImpl(p); | ||
| 138 | impl.setSocket(this); | ||
| 139 | } else { | ||
| 140 | if (p == Proxy.NO_PROXY) { | ||
| 141 | if (factory == null) { | ||
| 142 | impl = new PlainSocketImpl(); | ||
| 143 | impl.setSocket(this); | ||
| 144 | } else | ||
| 145 | setImpl(); | ||
| 146 | } else | ||
| 147 | throw new IllegalArgumentException("Invalid Proxy"); | ||
| 148 | } | ||
| 149 | } | ||
| 150 | |||
| 151 | /** | ||
| 152 | * Creates an unconnected Socket with a user-specified | ||
| 153 | * SocketImpl. | ||
| 154 | * <P> | ||
| 155 | * @param impl an instance of a <B>SocketImpl</B> | ||
| 156 | * the subclass wishes to use on the Socket. | ||
| 157 | * | ||
| 158 | * @exception SocketException if there is an error in the underlying protocol, | ||
| 159 | * such as a TCP error. | ||
| 160 | * @since JDK1.1 | ||
| 161 | */ | ||
| 162 | protected Socket(SocketImpl impl) throws SocketException { | ||
| 163 | this.impl = impl; | ||
| 164 | if (impl != null) { | ||
| 165 | checkOldImpl(); | ||
| 166 | this.impl.setSocket(this); | ||
| 167 | } | ||
| 168 | } | ||
| 169 | |||
| 170 | /** | ||
| 171 | * Creates a stream socket and connects it to the specified port | ||
| 172 | * number on the named host. | ||
| 173 | * <p> | ||
| 174 | * If the specified host is <tt>null</tt> it is the equivalent of | ||
| 175 | * specifying the address as <tt>{@link java.net.InetAddress#getByName InetAddress.getByName}(null)</tt>. | ||
| 176 | * In other words, it is equivalent to specifying an address of the | ||
| 177 | * loopback interface. </p> | ||
| 178 | * <p> | ||
| 179 | * If the application has specified a server socket factory, that | ||
| 180 | * factory's <code>createSocketImpl</code> method is called to create | ||
| 181 | * the actual socket implementation. Otherwise a "plain" socket is created. | ||
| 182 | * <p> | ||
| 183 | * If there is a security manager, its | ||
| 184 | * <code>checkConnect</code> method is called | ||
| 185 | * with the host address and <code>port</code> | ||
| 186 | * as its arguments. This could result in a SecurityException. | ||
| 187 | * | ||
| 188 | * @param host the host name, or <code>null</code> for the loopback address. | ||
| 189 | * @param port the port number. | ||
| 190 | * | ||
| 191 | * @exception UnknownHostException if the IP address of | ||
| 192 | * the host could not be determined. | ||
| 193 | * | ||
| 194 | * @exception IOException if an I/O error occurs when creating the socket. | ||
| 195 | * @exception SecurityException if a security manager exists and its | ||
| 196 | * <code>checkConnect</code> method doesn't allow the operation. | ||
| 197 | * @exception IllegalArgumentException if the port parameter is outside | ||
| 198 | * the specified range of valid port values, which is between | ||
| 199 | * 0 and 65535, inclusive. | ||
| 200 | * @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) | ||
| 201 | * @see java.net.SocketImpl | ||
| 202 | * @see java.net.SocketImplFactory#createSocketImpl() | ||
| 203 | * @see SecurityManager#checkConnect | ||
| 204 | */ | ||
| 205 | public Socket(String host, int port) | ||
| 206 | throws UnknownHostException, IOException | ||
| 207 | { | ||
| 208 | this(host != null ? new InetSocketAddress(host, port) : | ||
| 209 | new InetSocketAddress(InetAddress.getByName(null), port), | ||
| 210 | (SocketAddress) null, true); | ||
| 211 | } | ||
| 212 | |||
| 213 | /** | ||
| 214 | * Creates a stream socket and connects it to the specified port | ||
| 215 | * number at the specified IP address. | ||
| 216 | * <p> | ||
| 217 | * If the application has specified a socket factory, that factory's | ||
| 218 | * <code>createSocketImpl</code> method is called to create the | ||
| 219 | * actual socket implementation. Otherwise a "plain" socket is created. | ||
| 220 | * <p> | ||
| 221 | * If there is a security manager, its | ||
| 222 | * <code>checkConnect</code> method is called | ||
| 223 | * with the host address and <code>port</code> | ||
| 224 | * as its arguments. This could result in a SecurityException. | ||
| 225 | * | ||
| 226 | * @param address the IP address. | ||
| 227 | * @param port the port number. | ||
| 228 | * @exception IOException if an I/O error occurs when creating the socket. | ||
| 229 | * @exception SecurityException if a security manager exists and its | ||
| 230 | * <code>checkConnect</code> method doesn't allow the operation. | ||
| 231 | * @exception IllegalArgumentException if the port parameter is outside | ||
| 232 | * the specified range of valid port values, which is between | ||
| 233 | * 0 and 65535, inclusive. | ||
| 234 | * @exception NullPointerException if <code>address</code> is null. | ||
| 235 | * @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) | ||
| 236 | * @see java.net.SocketImpl | ||
| 237 | * @see java.net.SocketImplFactory#createSocketImpl() | ||
| 238 | * @see SecurityManager#checkConnect | ||
| 239 | */ | ||
| 240 | public Socket(InetAddress address, int port) throws IOException { | ||
| 241 | this(address != null ? new InetSocketAddress(address, port) : null, | ||
| 242 | (SocketAddress) null, true); | ||
| 243 | } | ||
| 244 | |||
| 245 | /** | ||
| 246 | * Creates a socket and connects it to the specified remote host on | ||
| 247 | * the specified remote port. The Socket will also bind() to the local | ||
| 248 | * address and port supplied. | ||
| 249 | * <p> | ||
| 250 | * If the specified host is <tt>null</tt> it is the equivalent of | ||
| 251 | * specifying the address as <tt>{@link java.net.InetAddress#getByName InetAddress.getByName}(null)</tt>. | ||
| 252 | * In other words, it is equivalent to specifying an address of the | ||
| 253 | * loopback interface. </p> | ||
| 254 | * <p> | ||
| 255 | * A local port number of <code>zero</code> will let the system pick up a | ||
| 256 | * free port in the <code>bind</code> operation.</p> | ||
| 257 | * <p> | ||
| 258 | * If there is a security manager, its | ||
| 259 | * <code>checkConnect</code> method is called | ||
| 260 | * with the host address and <code>port</code> | ||
| 261 | * as its arguments. This could result in a SecurityException. | ||
| 262 | * | ||
| 263 | * @param host the name of the remote host, or <code>null</code> for the loopback address. | ||
| 264 | * @param port the remote port | ||
| 265 | * @param localAddr the local address the socket is bound to, or | ||
| 266 | * <code>null</code> for the <code>anyLocal</code> address. | ||
| 267 | * @param localPort the local port the socket is bound to, or | ||
| 268 | * <code>zero</code> for a system selected free port. | ||
| 269 | * @exception IOException if an I/O error occurs when creating the socket. | ||
| 270 | * @exception SecurityException if a security manager exists and its | ||
| 271 | * <code>checkConnect</code> method doesn't allow the operation. | ||
| 272 | * @exception IllegalArgumentException if the port parameter or localPort | ||
| 273 | * parameter is outside the specified range of valid port values, | ||
| 274 | * which is between 0 and 65535, inclusive. | ||
| 275 | * @see SecurityManager#checkConnect | ||
| 276 | * @since JDK1.1 | ||
| 277 | */ | ||
| 278 | public Socket(String host, int port, InetAddress localAddr, | ||
| 279 | int localPort) throws IOException { | ||
| 280 | this(host != null ? new InetSocketAddress(host, port) : | ||
| 281 | new InetSocketAddress(InetAddress.getByName(null), port), | ||
| 282 | new InetSocketAddress(localAddr, localPort), true); | ||
| 283 | } | ||
| 284 | |||
| 285 | /** | ||
| 286 | * Creates a socket and connects it to the specified remote address on | ||
| 287 | * the specified remote port. The Socket will also bind() to the local | ||
| 288 | * address and port supplied. | ||
| 289 | * <p> | ||
| 290 | * If the specified local address is <tt>null</tt> it is the equivalent of | ||
| 291 | * specifying the address as the AnyLocal address (see <tt>{@link java.net.InetAddress#isAnyLocalAddress InetAddress.isAnyLocalAddress}()</tt>). | ||
| 292 | * <p> | ||
| 293 | * A local port number of <code>zero</code> will let the system pick up a | ||
| 294 | * free port in the <code>bind</code> operation.</p> | ||
| 295 | * <p> | ||
| 296 | * If there is a security manager, its | ||
| 297 | * <code>checkConnect</code> method is called | ||
| 298 | * with the host address and <code>port</code> | ||
| 299 | * as its arguments. This could result in a SecurityException. | ||
| 300 | * | ||
| 301 | * @param address the remote address | ||
| 302 | * @param port the remote port | ||
| 303 | * @param localAddr the local address the socket is bound to, or | ||
| 304 | * <code>null</code> for the <code>anyLocal</code> address. | ||
| 305 | * @param localPort the local port the socket is bound to or | ||
| 306 | * <code>zero</code> for a system selected free port. | ||
| 307 | * @exception IOException if an I/O error occurs when creating the socket. | ||
| 308 | * @exception SecurityException if a security manager exists and its | ||
| 309 | * <code>checkConnect</code> method doesn't allow the operation. | ||
| 310 | * @exception IllegalArgumentException if the port parameter or localPort | ||
| 311 | * parameter is outside the specified range of valid port values, | ||
| 312 | * which is between 0 and 65535, inclusive. | ||
| 313 | * @exception NullPointerException if <code>address</code> is null. | ||
| 314 | * @see SecurityManager#checkConnect | ||
| 315 | * @since JDK1.1 | ||
| 316 | */ | ||
| 317 | public Socket(InetAddress address, int port, InetAddress localAddr, | ||
| 318 | int localPort) throws IOException { | ||
| 319 | this(address != null ? new InetSocketAddress(address, port) : null, | ||
| 320 | new InetSocketAddress(localAddr, localPort), true); | ||
| 321 | } | ||
| 322 | |||
| 323 | /** | ||
| 324 | * Creates a stream socket and connects it to the specified port | ||
| 325 | * number on the named host. | ||
| 326 | * <p> | ||
| 327 | * If the specified host is <tt>null</tt> it is the equivalent of | ||
| 328 | * specifying the address as <tt>{@link java.net.InetAddress#getByName InetAddress.getByName}(null)</tt>. | ||
| 329 | * In other words, it is equivalent to specifying an address of the | ||
| 330 | * loopback interface. </p> | ||
| 331 | * <p> | ||
| 332 | * If the stream argument is <code>true</code>, this creates a | ||
| 333 | * stream socket. If the stream argument is <code>false</code>, it | ||
| 334 | * creates a datagram socket. | ||
| 335 | * <p> | ||
| 336 | * If the application has specified a server socket factory, that | ||
| 337 | * factory's <code>createSocketImpl</code> method is called to create | ||
| 338 | * the actual socket implementation. Otherwise a "plain" socket is created. | ||
| 339 | * <p> | ||
| 340 | * If there is a security manager, its | ||
| 341 | * <code>checkConnect</code> method is called | ||
| 342 | * with the host address and <code>port</code> | ||
| 343 | * as its arguments. This could result in a SecurityException. | ||
| 344 | * <p> | ||
| 345 | * If a UDP socket is used, TCP/IP related socket options will not apply. | ||
| 346 | * | ||
| 347 | * @param host the host name, or <code>null</code> for the loopback address. | ||
| 348 | * @param port the port number. | ||
| 349 | * @param stream a <code>boolean</code> indicating whether this is | ||
| 350 | * a stream socket or a datagram socket. | ||
| 351 | * @exception IOException if an I/O error occurs when creating the socket. | ||
| 352 | * @exception SecurityException if a security manager exists and its | ||
| 353 | * <code>checkConnect</code> method doesn't allow the operation. | ||
| 354 | * @exception IllegalArgumentException if the port parameter is outside | ||
| 355 | * the specified range of valid port values, which is between | ||
| 356 | * 0 and 65535, inclusive. | ||
| 357 | * @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) | ||
| 358 | * @see java.net.SocketImpl | ||
| 359 | * @see java.net.SocketImplFactory#createSocketImpl() | ||
| 360 | * @see SecurityManager#checkConnect | ||
| 361 | * @deprecated Use DatagramSocket instead for UDP transport. | ||
| 362 | */ | ||
| 363 | @Deprecated | ||
| 364 | public Socket(String host, int port, boolean stream) throws IOException { | ||
| 365 | this(host != null ? new InetSocketAddress(host, port) : | ||
| 366 | new InetSocketAddress(InetAddress.getByName(null), port), | ||
| 367 | (SocketAddress) null, stream); | ||
| 368 | } | ||
| 369 | |||
| 370 | /** | ||
| 371 | * Creates a socket and connects it to the specified port number at | ||
| 372 | * the specified IP address. | ||
| 373 | * <p> | ||
| 374 | * If the stream argument is <code>true</code>, this creates a | ||
| 375 | * stream socket. If the stream argument is <code>false</code>, it | ||
| 376 | * creates a datagram socket. | ||
| 377 | * <p> | ||
| 378 | * If the application has specified a server socket factory, that | ||
| 379 | * factory's <code>createSocketImpl</code> method is called to create | ||
| 380 | * the actual socket implementation. Otherwise a "plain" socket is created. | ||
| 381 | * | ||
| 382 | * <p>If there is a security manager, its | ||
| 383 | * <code>checkConnect</code> method is called | ||
| 384 | * with <code>host.getHostAddress()</code> and <code>port</code> | ||
| 385 | * as its arguments. This could result in a SecurityException. | ||
| 386 | * <p> | ||
| 387 | * If UDP socket is used, TCP/IP related socket options will not apply. | ||
| 388 | * | ||
| 389 | * @param host the IP address. | ||
| 390 | * @param port the port number. | ||
| 391 | * @param stream if <code>true</code>, create a stream socket; | ||
| 392 | * otherwise, create a datagram socket. | ||
| 393 | * @exception IOException if an I/O error occurs when creating the socket. | ||
| 394 | * @exception SecurityException if a security manager exists and its | ||
| 395 | * <code>checkConnect</code> method doesn't allow the operation. | ||
| 396 | * @exception IllegalArgumentException if the port parameter is outside | ||
| 397 | * the specified range of valid port values, which is between | ||
| 398 | * 0 and 65535, inclusive. | ||
| 399 | * @exception NullPointerException if <code>host</code> is null. | ||
| 400 | * @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) | ||
| 401 | * @see java.net.SocketImpl | ||
| 402 | * @see java.net.SocketImplFactory#createSocketImpl() | ||
| 403 | * @see SecurityManager#checkConnect | ||
| 404 | * @deprecated Use DatagramSocket instead for UDP transport. | ||
| 405 | */ | ||
| 406 | @Deprecated | ||
| 407 | public Socket(InetAddress host, int port, boolean stream) throws IOException { | ||
| 408 | this(host != null ? new InetSocketAddress(host, port) : null, | ||
| 409 | new InetSocketAddress(0), stream); | ||
| 410 | } | ||
| 411 | |||
| 412 | private Socket(SocketAddress address, SocketAddress localAddr, | ||
| 413 | boolean stream) throws IOException { | ||
| 414 | setImpl(); | ||
| 415 | |||
| 416 | // backward compatibility | ||
| 417 | if (address == null) | ||
| 418 | throw new NullPointerException(); | ||
| 419 | |||
| 420 | try { | ||
| 421 | createImpl(stream); | ||
| 422 | if (localAddr != null) | ||
| 423 | bind(localAddr); | ||
| 424 | if (address != null) | ||
| 425 | connect(address); | ||
| 426 | } catch (IOException e) { | ||
| 427 | close(); | ||
| 428 | throw e; | ||
| 429 | } | ||
| 430 | } | ||
| 431 | |||
| 432 | /** | ||
| 433 | * Creates the socket implementation. | ||
| 434 | * | ||
| 435 | * @param stream a <code>boolean</code> value : <code>true</code> for a TCP socket, | ||
| 436 | * <code>false</code> for UDP. | ||
| 437 | * @throws IOException if creation fails | ||
| 438 | * @since 1.4 | ||
| 439 | */ | ||
| 440 | void createImpl(boolean stream) throws SocketException { | ||
| 441 | if (impl == null) | ||
| 442 | setImpl(); | ||
| 443 | try { | ||
| 444 | impl.create(stream); | ||
| 445 | created = true; | ||
| 446 | } catch (IOException e) { | ||
| 447 | throw new SocketException(e.getMessage()); | ||
| 448 | } | ||
| 449 | } | ||
| 450 | |||
| 451 | private void checkOldImpl() { | ||
| 452 | if (impl == null) | ||
| 453 | return; | ||
| 454 | // SocketImpl.connect() is a protected method, therefore we need to use | ||
| 455 | // getDeclaredMethod, therefore we need permission to access the member | ||
| 456 | |||
| 457 | oldImpl = AccessController.doPrivileged | ||
| 458 | (new PrivilegedAction<Boolean>() { | ||
| 459 | public Boolean run() { | ||
| 460 | Class[] cl = new Class[2]; | ||
| 461 | cl[0] = SocketAddress.class; | ||
| 462 | cl[1] = Integer.TYPE; | ||
| 463 | Class clazz = impl.getClass(); | ||
| 464 | while (true) { | ||
| 465 | try { | ||
| 466 | clazz.getDeclaredMethod("connect", cl); | ||
| 467 | return Boolean.FALSE; | ||
| 468 | } catch (NoSuchMethodException e) { | ||
| 469 | clazz = clazz.getSuperclass(); | ||
| 470 | // java.net.SocketImpl class will always have this abstract method. | ||
| 471 | // If we have not found it by now in the hierarchy then it does not | ||
| 472 | // exist, we are an old style impl. | ||
| 473 | if (clazz.equals(java.net.SocketImpl.class)) { | ||
| 474 | return Boolean.TRUE; | ||
| 475 | } | ||
| 476 | } | ||
| 477 | } | ||
| 478 | } | ||
| 479 | }); | ||
| 480 | } | ||
| 481 | |||
| 482 | /** | ||
| 483 | * Sets impl to the system-default type of SocketImpl. | ||
| 484 | * @since 1.4 | ||
| 485 | */ | ||
| 486 | void setImpl() { | ||
| 487 | if (factory != null) { | ||
| 488 | impl = factory.createSocketImpl(); | ||
| 489 | checkOldImpl(); | ||
| 490 | } else { | ||
| 491 | // No need to do a checkOldImpl() here, we know it's an up to date | ||
| 492 | // SocketImpl! | ||
| 493 | impl = new SocksSocketImpl(); | ||
| 494 | } | ||
| 495 | if (impl != null) | ||
| 496 | impl.setSocket(this); | ||
| 497 | } | ||
| 498 | |||
| 499 | |||
| 500 | /** | ||
| 501 | * Get the <code>SocketImpl</code> attached to this socket, creating | ||
| 502 | * it if necessary. | ||
| 503 | * | ||
| 504 | * @return the <code>SocketImpl</code> attached to that ServerSocket. | ||
| 505 | * @throws SocketException if creation fails | ||
| 506 | * @since 1.4 | ||
| 507 | */ | ||
| 508 | SocketImpl getImpl() throws SocketException { | ||
| 509 | if (!created) | ||
| 510 | createImpl(true); | ||
| 511 | return impl; | ||
| 512 | } | ||
| 513 | |||
| 514 | /** | ||
| 515 | * Connects this socket to the server. | ||
| 516 | * | ||
| 517 | * @param endpoint the <code>SocketAddress</code> | ||
| 518 | * @throws IOException if an error occurs during the connection | ||
| 519 | * @throws java.nio.channels.IllegalBlockingModeException | ||
| 520 | * if this socket has an associated channel, | ||
| 521 | * and the channel is in non-blocking mode | ||
| 522 | * @throws IllegalArgumentException if endpoint is null or is a | ||
| 523 | * SocketAddress subclass not supported by this socket | ||
| 524 | * @since 1.4 | ||
| 525 | * @spec JSR-51 | ||
| 526 | */ | ||
| 527 | public void connect(SocketAddress endpoint) throws IOException { | ||
| 528 | connect(endpoint, 0); | ||
| 529 | } | ||
| 530 | |||
| 531 | /** | ||
| 532 | * Connects this socket to the server with a specified timeout value. | ||
| 533 | * A timeout of zero is interpreted as an infinite timeout. The connection | ||
| 534 | * will then block until established or an error occurs. | ||
| 535 | * | ||
| 536 | * @param endpoint the <code>SocketAddress</code> | ||
| 537 | * @param timeout the timeout value to be used in milliseconds. | ||
| 538 | * @throws IOException if an error occurs during the connection | ||
| 539 | * @throws SocketTimeoutException if timeout expires before connecting | ||
| 540 | * @throws java.nio.channels.IllegalBlockingModeException | ||
| 541 | * if this socket has an associated channel, | ||
| 542 | * and the channel is in non-blocking mode | ||
| 543 | * @throws IllegalArgumentException if endpoint is null or is a | ||
| 544 | * SocketAddress subclass not supported by this socket | ||
| 545 | * @since 1.4 | ||
| 546 | * @spec JSR-51 | ||
| 547 | */ | ||
| 548 | public void connect(SocketAddress endpoint, int timeout) throws IOException { | ||
| 549 | if (endpoint == null) | ||
| 550 | throw new IllegalArgumentException("connect: The address can't be null"); | ||
| 551 | |||
| 552 | if (timeout < 0) | ||
| 553 | throw new IllegalArgumentException("connect: timeout can't be negative"); | ||
| 554 | |||
| 555 | if (isClosed()) | ||
| 556 | throw new SocketException("Socket is closed"); | ||
| 557 | |||
| 558 | if (!oldImpl && isConnected()) | ||
| 559 | throw new SocketException("already connected"); | ||
| 560 | |||
| 561 | if (!(endpoint instanceof InetSocketAddress)) | ||
| 562 | throw new IllegalArgumentException("Unsupported address type"); | ||
| 563 | |||
| 564 | InetSocketAddress epoint = (InetSocketAddress) endpoint; | ||
| 565 | InetAddress addr = epoint.getAddress (); | ||
| 566 | int port = epoint.getPort(); | ||
| 567 | checkAddress(addr, "connect"); | ||
| 568 | |||
| 569 | SecurityManager security = System.getSecurityManager(); | ||
| 570 | if (security != null) { | ||
| 571 | if (epoint.isUnresolved()) | ||
| 572 | security.checkConnect(epoint.getHostName(), port); | ||
| 573 | else | ||
| 574 | security.checkConnect(addr.getHostAddress(), port); | ||
| 575 | } | ||
| 576 | if (!created) | ||
| 577 | createImpl(true); | ||
| 578 | if (!oldImpl) | ||
| 579 | impl.connect(epoint, timeout); | ||
| 580 | else if (timeout == 0) { | ||
| 581 | if (epoint.isUnresolved()) | ||
| 582 | impl.connect(addr.getHostName(), port); | ||
| 583 | else | ||
| 584 | impl.connect(addr, port); | ||
| 585 | } else | ||
| 586 | throw new UnsupportedOperationException("SocketImpl.connect(addr, timeout)"); | ||
| 587 | connected = true; | ||
| 588 | /* | ||
| 589 | * If the socket was not bound before the connect, it is now because | ||
| 590 | * the kernel will have picked an ephemeral port & a local address | ||
| 591 | */ | ||
| 592 | bound = true; | ||
| 593 | } | ||
| 594 | |||
| 595 | /** | ||
| 596 | * Binds the socket to a local address. | ||
| 597 | * <P> | ||
| 598 | * If the address is <code>null</code>, then the system will pick up | ||
| 599 | * an ephemeral port and a valid local address to bind the socket. | ||
| 600 | * | ||
| 601 | * @param bindpoint the <code>SocketAddress</code> to bind to | ||
| 602 | * @throws IOException if the bind operation fails, or if the socket | ||
| 603 | * is already bound. | ||
| 604 | * @throws IllegalArgumentException if bindpoint is a | ||
| 605 | * SocketAddress subclass not supported by this socket | ||
| 606 | * | ||
| 607 | * @since 1.4 | ||
| 608 | * @see #isBound | ||
| 609 | */ | ||
| 610 | public void bind(SocketAddress bindpoint) throws IOException { | ||
| 611 | if (isClosed()) | ||
| 612 | throw new SocketException("Socket is closed"); | ||
| 613 | if (!oldImpl && isBound()) | ||
| 614 | throw new SocketException("Already bound"); | ||
| 615 | |||
| 616 | if (bindpoint != null && (!(bindpoint instanceof InetSocketAddress))) | ||
| 617 | throw new IllegalArgumentException("Unsupported address type"); | ||
| 618 | InetSocketAddress epoint = (InetSocketAddress) bindpoint; | ||
| 619 | if (epoint != null && epoint.isUnresolved()) | ||
| 620 | throw new SocketException("Unresolved address"); | ||
| 621 | if (epoint == null) { | ||
| 622 | epoint = new InetSocketAddress(0); | ||
| 623 | } | ||
| 624 | InetAddress addr = epoint.getAddress(); | ||
| 625 | int port = epoint.getPort(); | ||
| 626 | checkAddress (addr, "bind"); | ||
| 627 | getImpl().bind (addr, port); | ||
| 628 | bound = true; | ||
| 629 | } | ||
| 630 | |||
| 631 | private void checkAddress (InetAddress addr, String op) { | ||
| 632 | if (addr == null) { | ||
| 633 | return; | ||
| 634 | } | ||
| 635 | if (!(addr instanceof Inet4Address || addr instanceof Inet6Address)) { | ||
| 636 | throw new IllegalArgumentException(op + ": invalid address type"); | ||
| 637 | } | ||
| 638 | } | ||
| 639 | |||
| 640 | /** | ||
| 641 | * set the flags after an accept() call. | ||
| 642 | */ | ||
| 643 | final void postAccept() { | ||
| 644 | connected = true; | ||
| 645 | created = true; | ||
| 646 | bound = true; | ||
| 647 | } | ||
| 648 | |||
| 649 | void setCreated() { | ||
| 650 | created = true; | ||
| 651 | } | ||
| 652 | |||
| 653 | void setBound() { | ||
| 654 | bound = true; | ||
| 655 | } | ||
| 656 | |||
| 657 | void setConnected() { | ||
| 658 | connected = true; | ||
| 659 | } | ||
| 660 | |||
| 661 | /** | ||
| 662 | * Returns the address to which the socket is connected. | ||
| 663 | * <p> | ||
| 664 | * If the socket was connected prior to being {@link #close closed}, | ||
| 665 | * then this method will continue to return the connected address | ||
| 666 | * after the socket is closed. | ||
| 667 | * | ||
| 668 | * @return the remote IP address to which this socket is connected, | ||
| 669 | * or <code>null</code> if the socket is not connected. | ||
| 670 | */ | ||
| 671 | public InetAddress getInetAddress() { | ||
| 672 | if (!isConnected()) | ||
| 673 | return null; | ||
| 674 | try { | ||
| 675 | return getImpl().getInetAddress(); | ||
| 676 | } catch (SocketException e) { | ||
| 677 | } | ||
| 678 | return null; | ||
| 679 | } | ||
| 680 | |||
| 681 | /** | ||
| 682 | * Gets the local address to which the socket is bound. | ||
| 683 | * | ||
| 684 | * @return the local address to which the socket is bound, or | ||
| 685 | * the {@link InetAddress#isAnyLocalAddress wildcard} address | ||
| 686 | * if the socket is closed or not bound yet. | ||
| 687 | * @since JDK1.1 | ||
| 688 | */ | ||
| 689 | public InetAddress getLocalAddress() { | ||
| 690 | // This is for backward compatibility | ||
| 691 | if (!isBound()) | ||
| 692 | return InetAddress.anyLocalAddress(); | ||
| 693 | InetAddress in = null; | ||
| 694 | try { | ||
| 695 | in = (InetAddress) getImpl().getOption(SocketOptions.SO_BINDADDR); | ||
| 696 | if (in.isAnyLocalAddress()) { | ||
| 697 | in = InetAddress.anyLocalAddress(); | ||
| 698 | } | ||
| 699 | } catch (Exception e) { | ||
| 700 | in = InetAddress.anyLocalAddress(); // "0.0.0.0" | ||
| 701 | } | ||
| 702 | return in; | ||
| 703 | } | ||
| 704 | |||
| 705 | /** | ||
| 706 | * Returns the remote port number to which this socket is connected. | ||
| 707 | * <p> | ||
| 708 | * If the socket was connected prior to being {@link #close closed}, | ||
| 709 | * then this method will continue to return the connected port number | ||
| 710 | * after the socket is closed. | ||
| 711 | * | ||
| 712 | * @return the remote port number to which this socket is connected, or | ||
| 713 | * 0 if the socket is not connected yet. | ||
| 714 | */ | ||
| 715 | public int getPort() { | ||
| 716 | if (!isConnected()) | ||
| 717 | return 0; | ||
| 718 | try { | ||
| 719 | return getImpl().getPort(); | ||
| 720 | } catch (SocketException e) { | ||
| 721 | // Shouldn't happen as we're connected | ||
| 722 | } | ||
| 723 | return -1; | ||
| 724 | } | ||
| 725 | |||
| 726 | /** | ||
| 727 | * Returns the local port number to which this socket is bound. | ||
| 728 | * <p> | ||
| 729 | * If the socket was bound prior to being {@link #close closed}, | ||
| 730 | * then this method will continue to return the local port number | ||
| 731 | * after the socket is closed. | ||
| 732 | * | ||
| 733 | * @return the local port number to which this socket is bound or -1 | ||
| 734 | * if the socket is not bound yet. | ||
| 735 | */ | ||
| 736 | public int getLocalPort() { | ||
| 737 | if (!isBound()) | ||
| 738 | return -1; | ||
| 739 | try { | ||
| 740 | return getImpl().getLocalPort(); | ||
| 741 | } catch(SocketException e) { | ||
| 742 | // shouldn't happen as we're bound | ||
| 743 | } | ||
| 744 | return -1; | ||
| 745 | } | ||
| 746 | |||
| 747 | /** | ||
| 748 | * Returns the address of the endpoint this socket is connected to, or | ||
| 749 | * <code>null</code> if it is unconnected. | ||
| 750 | * <p> | ||
| 751 | * If the socket was connected prior to being {@link #close closed}, | ||
| 752 | * then this method will continue to return the connected address | ||
| 753 | * after the socket is closed. | ||
| 754 | * | ||
| 755 | |||
| 756 | * @return a <code>SocketAddress</code> representing the remote endpoint of this | ||
| 757 | * socket, or <code>null</code> if it is not connected yet. | ||
| 758 | * @see #getInetAddress() | ||
| 759 | * @see #getPort() | ||
| 760 | * @see #connect(SocketAddress, int) | ||
| 761 | * @see #connect(SocketAddress) | ||
| 762 | * @since 1.4 | ||
| 763 | */ | ||
| 764 | public SocketAddress getRemoteSocketAddress() { | ||
| 765 | if (!isConnected()) | ||
| 766 | return null; | ||
| 767 | return new InetSocketAddress(getInetAddress(), getPort()); | ||
| 768 | } | ||
| 769 | |||
| 770 | /** | ||
| 771 | * Returns the address of the endpoint this socket is bound to, or | ||
| 772 | * <code>null</code> if it is not bound yet. | ||
| 773 | * <p> | ||
| 774 | * If a socket bound to an endpoint represented by an | ||
| 775 | * <code>InetSocketAddress </code> is {@link #close closed}, | ||
| 776 | * then this method will continue to return an <code>InetSocketAddress</code> | ||
| 777 | * after the socket is closed. In that case the returned | ||
| 778 | * <code>InetSocketAddress</code>'s address is the | ||
| 779 | * {@link InetAddress#isAnyLocalAddress wildcard} address | ||
| 780 | * and its port is the local port that it was bound to. | ||
| 781 | * | ||
| 782 | * @return a <code>SocketAddress</code> representing the local endpoint of this | ||
| 783 | * socket, or <code>null</code> if it is not bound yet. | ||
| 784 | * @see #getLocalAddress() | ||
| 785 | * @see #getLocalPort() | ||
| 786 | * @see #bind(SocketAddress) | ||
| 787 | * @since 1.4 | ||
| 788 | */ | ||
| 789 | |||
| 790 | public SocketAddress getLocalSocketAddress() { | ||
| 791 | if (!isBound()) | ||
| 792 | return null; | ||
| 793 | return new InetSocketAddress(getLocalAddress(), getLocalPort()); | ||
| 794 | } | ||
| 795 | |||
| 796 | /** | ||
| 797 | * Returns the unique {@link java.nio.channels.SocketChannel SocketChannel} | ||
| 798 | * object associated with this socket, if any. | ||
| 799 | * | ||
| 800 | * <p> A socket will have a channel if, and only if, the channel itself was | ||
| 801 | * created via the {@link java.nio.channels.SocketChannel#open | ||
| 802 | * SocketChannel.open} or {@link | ||
| 803 | * java.nio.channels.ServerSocketChannel#accept ServerSocketChannel.accept} | ||
| 804 | * methods. | ||
| 805 | * | ||
| 806 | * @return the socket channel associated with this socket, | ||
| 807 | * or <tt>null</tt> if this socket was not created | ||
| 808 | * for a channel | ||
| 809 | * | ||
| 810 | * @since 1.4 | ||
| 811 | * @spec JSR-51 | ||
| 812 | */ | ||
| 813 | public SocketChannel getChannel() { | ||
| 814 | return null; | ||
| 815 | } | ||
| 816 | |||
| 817 | /** | ||
| 818 | * Returns an input stream for this socket. | ||
| 819 | * | ||
| 820 | * <p> If this socket has an associated channel then the resulting input | ||
| 821 | * stream delegates all of its operations to the channel. If the channel | ||
| 822 | * is in non-blocking mode then the input stream's <tt>read</tt> operations | ||
| 823 | * will throw an {@link java.nio.channels.IllegalBlockingModeException}. | ||
| 824 | * | ||
| 825 | * <p>Under abnormal conditions the underlying connection may be | ||
| 826 | * broken by the remote host or the network software (for example | ||
| 827 | * a connection reset in the case of TCP connections). When a | ||
| 828 | * broken connection is detected by the network software the | ||
| 829 | * following applies to the returned input stream :- | ||
| 830 | * | ||
| 831 | * <ul> | ||
| 832 | * | ||
| 833 | * <li><p>The network software may discard bytes that are buffered | ||
| 834 | * by the socket. Bytes that aren't discarded by the network | ||
| 835 | * software can be read using {@link java.io.InputStream#read read}. | ||
| 836 | * | ||
| 837 | * <li><p>If there are no bytes buffered on the socket, or all | ||
| 838 | * buffered bytes have been consumed by | ||
| 839 | * {@link java.io.InputStream#read read}, then all subsequent | ||
| 840 | * calls to {@link java.io.InputStream#read read} will throw an | ||
| 841 | * {@link java.io.IOException IOException}. | ||
| 842 | * | ||
| 843 | * <li><p>If there are no bytes buffered on the socket, and the | ||
| 844 | * socket has not been closed using {@link #close close}, then | ||
| 845 | * {@link java.io.InputStream#available available} will | ||
| 846 | * return <code>0</code>. | ||
| 847 | * | ||
| 848 | * </ul> | ||
| 849 | * | ||
| 850 | * <p> Closing the returned {@link java.io.InputStream InputStream} | ||
| 851 | * will close the associated socket. | ||
| 852 | * | ||
| 853 | * @return an input stream for reading bytes from this socket. | ||
| 854 | * @exception IOException if an I/O error occurs when creating the | ||
| 855 | * input stream, the socket is closed, the socket is | ||
| 856 | * not connected, or the socket input has been shutdown | ||
| 857 | * using {@link #shutdownInput()} | ||
| 858 | * | ||
| 859 | * @revised 1.4 | ||
| 860 | * @spec JSR-51 | ||
| 861 | */ | ||
| 862 | public InputStream getInputStream() throws IOException { | ||
| 863 | if (isClosed()) | ||
| 864 | throw new SocketException("Socket is closed"); | ||
| 865 | if (!isConnected()) | ||
| 866 | throw new SocketException("Socket is not connected"); | ||
| 867 | if (isInputShutdown()) | ||
| 868 | throw new SocketException("Socket input is shutdown"); | ||
| 869 | final Socket s = this; | ||
| 870 | InputStream is = null; | ||
| 871 | try { | ||
| 872 | is = AccessController.doPrivileged( | ||
| 873 | new PrivilegedExceptionAction<InputStream>() { | ||
| 874 | public InputStream run() throws IOException { | ||
| 875 | return impl.getInputStream(); | ||
| 876 | } | ||
| 877 | }); | ||
| 878 | } catch (java.security.PrivilegedActionException e) { | ||
| 879 | throw (IOException) e.getException(); | ||
| 880 | } | ||
| 881 | return is; | ||
| 882 | } | ||
| 883 | |||
| 884 | /** | ||
| 885 | * Returns an output stream for this socket. | ||
| 886 | * | ||
| 887 | * <p> If this socket has an associated channel then the resulting output | ||
| 888 | * stream delegates all of its operations to the channel. If the channel | ||
| 889 | * is in non-blocking mode then the output stream's <tt>write</tt> | ||
| 890 | * operations will throw an {@link | ||
| 891 | * java.nio.channels.IllegalBlockingModeException}. | ||
| 892 | * | ||
| 893 | * <p> Closing the returned {@link java.io.OutputStream OutputStream} | ||
| 894 | * will close the associated socket. | ||
| 895 | * | ||
| 896 | * @return an output stream for writing bytes to this socket. | ||
| 897 | * @exception IOException if an I/O error occurs when creating the | ||
| 898 | * output stream or if the socket is not connected. | ||
| 899 | * @revised 1.4 | ||
| 900 | * @spec JSR-51 | ||
| 901 | */ | ||
| 902 | public OutputStream getOutputStream() throws IOException { | ||
| 903 | if (isClosed()) | ||
| 904 | throw new SocketException("Socket is closed"); | ||
| 905 | if (!isConnected()) | ||
| 906 | throw new SocketException("Socket is not connected"); | ||
| 907 | if (isOutputShutdown()) | ||
| 908 | throw new SocketException("Socket output is shutdown"); | ||
| 909 | final Socket s = this; | ||
| 910 | OutputStream os = null; | ||
| 911 | try { | ||
| 912 | os = AccessController.doPrivileged( | ||
| 913 | new PrivilegedExceptionAction<OutputStream>() { | ||
| 914 | public OutputStream run() throws IOException { | ||
| 915 | return impl.getOutputStream(); | ||
| 916 | } | ||
| 917 | }); | ||
| 918 | } catch (java.security.PrivilegedActionException e) { | ||
| 919 | throw (IOException) e.getException(); | ||
| 920 | } | ||
| 921 | return os; | ||
| 922 | } | ||
| 923 | |||
| 924 | /** | ||
| 925 | * Enable/disable TCP_NODELAY (disable/enable Nagle's algorithm). | ||
| 926 | * | ||
| 927 | * @param on <code>true</code> to enable TCP_NODELAY, | ||
| 928 | * <code>false</code> to disable. | ||
| 929 | * | ||
| 930 | * @exception SocketException if there is an error | ||
| 931 | * in the underlying protocol, such as a TCP error. | ||
| 932 | * | ||
| 933 | * @since JDK1.1 | ||
| 934 | * | ||
| 935 | * @see #getTcpNoDelay() | ||
| 936 | */ | ||
| 937 | public void setTcpNoDelay(boolean on) throws SocketException { | ||
| 938 | if (isClosed()) | ||
| 939 | throw new SocketException("Socket is closed"); | ||
| 940 | getImpl().setOption(SocketOptions.TCP_NODELAY, Boolean.valueOf(on)); | ||
| 941 | } | ||
| 942 | |||
| 943 | /** | ||
| 944 | * Tests if TCP_NODELAY is enabled. | ||
| 945 | * | ||
| 946 | * @return a <code>boolean</code> indicating whether or not TCP_NODELAY is enabled. | ||
| 947 | * @exception SocketException if there is an error | ||
| 948 | * in the underlying protocol, such as a TCP error. | ||
| 949 | * @since JDK1.1 | ||
| 950 | * @see #setTcpNoDelay(boolean) | ||
| 951 | */ | ||
| 952 | public boolean getTcpNoDelay() throws SocketException { | ||
| 953 | if (isClosed()) | ||
| 954 | throw new SocketException("Socket is closed"); | ||
| 955 | return ((Boolean) getImpl().getOption(SocketOptions.TCP_NODELAY)).booleanValue(); | ||
| 956 | } | ||
| 957 | |||
| 958 | /** | ||
| 959 | * Enable/disable SO_LINGER with the specified linger time in seconds. | ||
| 960 | * The maximum timeout value is platform specific. | ||
| 961 | * | ||
| 962 | * The setting only affects socket close. | ||
| 963 | * | ||
| 964 | * @param on whether or not to linger on. | ||
| 965 | * @param linger how long to linger for, if on is true. | ||
| 966 | * @exception SocketException if there is an error | ||
| 967 | * in the underlying protocol, such as a TCP error. | ||
| 968 | * @exception IllegalArgumentException if the linger value is negative. | ||
| 969 | * @since JDK1.1 | ||
| 970 | * @see #getSoLinger() | ||
| 971 | */ | ||
| 972 | public void setSoLinger(boolean on, int linger) throws SocketException { | ||
| 973 | if (isClosed()) | ||
| 974 | throw new SocketException("Socket is closed"); | ||
| 975 | if (!on) { | ||
| 976 | getImpl().setOption(SocketOptions.SO_LINGER, new Boolean(on)); | ||
| 977 | } else { | ||
| 978 | if (linger < 0) { | ||
| 979 | throw new IllegalArgumentException("invalid value for SO_LINGER"); | ||
| 980 | } | ||
| 981 | if (linger > 65535) | ||
| 982 | linger = 65535; | ||
| 983 | getImpl().setOption(SocketOptions.SO_LINGER, new Integer(linger)); | ||
| 984 | } | ||
| 985 | } | ||
| 986 | |||
| 987 | /** | ||
| 988 | * Returns setting for SO_LINGER. -1 returns implies that the | ||
| 989 | * option is disabled. | ||
| 990 | * | ||
| 991 | * The setting only affects socket close. | ||
| 992 | * | ||
| 993 | * @return the setting for SO_LINGER. | ||
| 994 | * @exception SocketException if there is an error | ||
| 995 | * in the underlying protocol, such as a TCP error. | ||
| 996 | * @since JDK1.1 | ||
| 997 | * @see #setSoLinger(boolean, int) | ||
| 998 | */ | ||
| 999 | public int getSoLinger() throws SocketException { | ||
| 1000 | if (isClosed()) | ||
| 1001 | throw new SocketException("Socket is closed"); | ||
| 1002 | Object o = getImpl().getOption(SocketOptions.SO_LINGER); | ||
| 1003 | if (o instanceof Integer) { | ||
| 1004 | return ((Integer) o).intValue(); | ||
| 1005 | } else { | ||
| 1006 | return -1; | ||
| 1007 | } | ||
| 1008 | } | ||
| 1009 | |||
| 1010 | /** | ||
| 1011 | * Send one byte of urgent data on the socket. The byte to be sent is the lowest eight | ||
| 1012 | * bits of the data parameter. The urgent byte is | ||
| 1013 | * sent after any preceding writes to the socket OutputStream | ||
| 1014 | * and before any future writes to the OutputStream. | ||
| 1015 | * @param data The byte of data to send | ||
| 1016 | * @exception IOException if there is an error | ||
| 1017 | * sending the data. | ||
| 1018 | * @since 1.4 | ||
| 1019 | */ | ||
| 1020 | public void sendUrgentData (int data) throws IOException { | ||
| 1021 | if (!getImpl().supportsUrgentData ()) { | ||
| 1022 | throw new SocketException ("Urgent data not supported"); | ||
| 1023 | } | ||
| 1024 | getImpl().sendUrgentData (data); | ||
| 1025 | } | ||
| 1026 | |||
| 1027 | /** | ||
| 1028 | * Enable/disable OOBINLINE (receipt of TCP urgent data) | ||
| 1029 | * | ||
| 1030 | * By default, this option is disabled and TCP urgent data received on a | ||
| 1031 | * socket is silently discarded. If the user wishes to receive urgent data, then | ||
| 1032 | * this option must be enabled. When enabled, urgent data is received | ||
| 1033 | * inline with normal data. | ||
| 1034 | * <p> | ||
| 1035 | * Note, only limited support is provided for handling incoming urgent | ||
| 1036 | * data. In particular, no notification of incoming urgent data is provided | ||
| 1037 | * and there is no capability to distinguish between normal data and urgent | ||
| 1038 | * data unless provided by a higher level protocol. | ||
| 1039 | * | ||
| 1040 | * @param on <code>true</code> to enable OOBINLINE, | ||
| 1041 | * <code>false</code> to disable. | ||
| 1042 | * | ||
| 1043 | * @exception SocketException if there is an error | ||
| 1044 | * in the underlying protocol, such as a TCP error. | ||
| 1045 | * | ||
| 1046 | * @since 1.4 | ||
| 1047 | * | ||
| 1048 | * @see #getOOBInline() | ||
| 1049 | */ | ||
| 1050 | public void setOOBInline(boolean on) throws SocketException { | ||
| 1051 | if (isClosed()) | ||
| 1052 | throw new SocketException("Socket is closed"); | ||
| 1053 | getImpl().setOption(SocketOptions.SO_OOBINLINE, Boolean.valueOf(on)); | ||
| 1054 | } | ||
| 1055 | |||
| 1056 | /** | ||
| 1057 | * Tests if OOBINLINE is enabled. | ||
| 1058 | * | ||
| 1059 | * @return a <code>boolean</code> indicating whether or not OOBINLINE is enabled. | ||
| 1060 | * @exception SocketException if there is an error | ||
| 1061 | * in the underlying protocol, such as a TCP error. | ||
| 1062 | * @since 1.4 | ||
| 1063 | * @see #setOOBInline(boolean) | ||
| 1064 | */ | ||
| 1065 | public boolean getOOBInline() throws SocketException { | ||
| 1066 | if (isClosed()) | ||
| 1067 | throw new SocketException("Socket is closed"); | ||
| 1068 | return ((Boolean) getImpl().getOption(SocketOptions.SO_OOBINLINE)).booleanValue(); | ||
| 1069 | } | ||
| 1070 | |||
| 1071 | /** | ||
| 1072 | * Enable/disable SO_TIMEOUT with the specified timeout, in | ||
| 1073 | * milliseconds. With this option set to a non-zero timeout, | ||
| 1074 | * a read() call on the InputStream associated with this Socket | ||
| 1075 | * will block for only this amount of time. If the timeout expires, | ||
| 1076 | * a <B>java.net.SocketTimeoutException</B> is raised, though the | ||
| 1077 | * Socket is still valid. The option <B>must</B> be enabled | ||
| 1078 | * prior to entering the blocking operation to have effect. The | ||
| 1079 | * timeout must be > 0. | ||
| 1080 | * A timeout of zero is interpreted as an infinite timeout. | ||
| 1081 | * @param timeout the specified timeout, in milliseconds. | ||
| 1082 | * @exception SocketException if there is an error | ||
| 1083 | * in the underlying protocol, such as a TCP error. | ||
| 1084 | * @since JDK 1.1 | ||
| 1085 | * @see #getSoTimeout() | ||
| 1086 | */ | ||
| 1087 | public synchronized void setSoTimeout(int timeout) throws SocketException { | ||
| 1088 | if (isClosed()) | ||
| 1089 | throw new SocketException("Socket is closed"); | ||
| 1090 | if (timeout < 0) | ||
| 1091 | throw new IllegalArgumentException("timeout can't be negative"); | ||
| 1092 | |||
| 1093 | getImpl().setOption(SocketOptions.SO_TIMEOUT, new Integer(timeout)); | ||
| 1094 | } | ||
| 1095 | |||
| 1096 | /** | ||
| 1097 | * Returns setting for SO_TIMEOUT. 0 returns implies that the | ||
| 1098 | * option is disabled (i.e., timeout of infinity). | ||
| 1099 | * @return the setting for SO_TIMEOUT | ||
| 1100 | * @exception SocketException if there is an error | ||
| 1101 | * in the underlying protocol, such as a TCP error. | ||
| 1102 | * @since JDK1.1 | ||
| 1103 | * @see #setSoTimeout(int) | ||
| 1104 | */ | ||
| 1105 | public synchronized int getSoTimeout() throws SocketException { | ||
| 1106 | if (isClosed()) | ||
| 1107 | throw new SocketException("Socket is closed"); | ||
| 1108 | Object o = getImpl().getOption(SocketOptions.SO_TIMEOUT); | ||
| 1109 | /* extra type safety */ | ||
| 1110 | if (o instanceof Integer) { | ||
| 1111 | return ((Integer) o).intValue(); | ||
| 1112 | } else { | ||
| 1113 | return 0; | ||
| 1114 | } | ||
| 1115 | } | ||
| 1116 | |||
| 1117 | /** | ||
| 1118 | * Sets the SO_SNDBUF option to the specified value for this | ||
| 1119 | * <tt>Socket</tt>. The SO_SNDBUF option is used by the platform's | ||
| 1120 | * networking code as a hint for the size to set | ||
| 1121 | * the underlying network I/O buffers. | ||
| 1122 | * | ||
| 1123 | * <p>Because SO_SNDBUF is a hint, applications that want to | ||
| 1124 | * verify what size the buffers were set to should call | ||
| 1125 | * {@link #getSendBufferSize()}. | ||
| 1126 | * | ||
| 1127 | * @exception SocketException if there is an error | ||
| 1128 | * in the underlying protocol, such as a TCP error. | ||
| 1129 | * | ||
| 1130 | * @param size the size to which to set the send buffer | ||
| 1131 | * size. This value must be greater than 0. | ||
| 1132 | * | ||
| 1133 | * @exception IllegalArgumentException if the | ||
| 1134 | * value is 0 or is negative. | ||
| 1135 | * | ||
| 1136 | * @see #getSendBufferSize() | ||
| 1137 | * @since 1.2 | ||
| 1138 | */ | ||
| 1139 | public synchronized void setSendBufferSize(int size) | ||
| 1140 | throws SocketException{ | ||
| 1141 | if (!(size > 0)) { | ||
| 1142 | throw new IllegalArgumentException("negative send size"); | ||
| 1143 | } | ||
| 1144 | if (isClosed()) | ||
| 1145 | throw new SocketException("Socket is closed"); | ||
| 1146 | getImpl().setOption(SocketOptions.SO_SNDBUF, new Integer(size)); | ||
| 1147 | } | ||
| 1148 | |||
| 1149 | /** | ||
| 1150 | * Get value of the SO_SNDBUF option for this <tt>Socket</tt>, | ||
| 1151 | * that is the buffer size used by the platform | ||
| 1152 | * for output on this <tt>Socket</tt>. | ||
| 1153 | * @return the value of the SO_SNDBUF option for this <tt>Socket</tt>. | ||
| 1154 | * | ||
| 1155 | * @exception SocketException if there is an error | ||
| 1156 | * in the underlying protocol, such as a TCP error. | ||
| 1157 | * | ||
| 1158 | * @see #setSendBufferSize(int) | ||
| 1159 | * @since 1.2 | ||
| 1160 | */ | ||
| 1161 | public synchronized int getSendBufferSize() throws SocketException { | ||
| 1162 | if (isClosed()) | ||
| 1163 | throw new SocketException("Socket is closed"); | ||
| 1164 | int result = 0; | ||
| 1165 | Object o = getImpl().getOption(SocketOptions.SO_SNDBUF); | ||
| 1166 | if (o instanceof Integer) { | ||
| 1167 | result = ((Integer)o).intValue(); | ||
| 1168 | } | ||
| 1169 | return result; | ||
| 1170 | } | ||
| 1171 | |||
| 1172 | /** | ||
| 1173 | * Sets the SO_RCVBUF option to the specified value for this | ||
| 1174 | * <tt>Socket</tt>. The SO_RCVBUF option is used by the platform's | ||
| 1175 | * networking code as a hint for the size to set | ||
| 1176 | * the underlying network I/O buffers. | ||
| 1177 | * | ||
| 1178 | * <p>Increasing the receive buffer size can increase the performance of | ||
| 1179 | * network I/O for high-volume connection, while decreasing it can | ||
| 1180 | * help reduce the backlog of incoming data. | ||
| 1181 | * | ||
| 1182 | * <p>Because SO_RCVBUF is a hint, applications that want to | ||
| 1183 | * verify what size the buffers were set to should call | ||
| 1184 | * {@link #getReceiveBufferSize()}. | ||
| 1185 | * | ||
| 1186 | * <p>The value of SO_RCVBUF is also used to set the TCP receive window | ||
| 1187 | * that is advertized to the remote peer. Generally, the window size | ||
| 1188 | * can be modified at any time when a socket is connected. However, if | ||
| 1189 | * a receive window larger than 64K is required then this must be requested | ||
| 1190 | * <B>before</B> the socket is connected to the remote peer. There are two | ||
| 1191 | * cases to be aware of:<p> | ||
| 1192 | * <ol> | ||
| 1193 | * <li>For sockets accepted from a ServerSocket, this must be done by calling | ||
| 1194 | * {@link ServerSocket#setReceiveBufferSize(int)} before the ServerSocket | ||
| 1195 | * is bound to a local address.<p></li> | ||
| 1196 | * <li>For client sockets, setReceiveBufferSize() must be called before | ||
| 1197 | * connecting the socket to its remote peer.<p></li></ol> | ||
| 1198 | * @param size the size to which to set the receive buffer | ||
| 1199 | * size. This value must be greater than 0. | ||
| 1200 | * | ||
| 1201 | * @exception IllegalArgumentException if the value is 0 or is | ||
| 1202 | * negative. | ||
| 1203 | * | ||
| 1204 | * @exception SocketException if there is an error | ||
| 1205 | * in the underlying protocol, such as a TCP error. | ||
| 1206 | * | ||
| 1207 | * @see #getReceiveBufferSize() | ||
| 1208 | * @see ServerSocket#setReceiveBufferSize(int) | ||
| 1209 | * @since 1.2 | ||
| 1210 | */ | ||
| 1211 | public synchronized void setReceiveBufferSize(int size) | ||
| 1212 | throws SocketException{ | ||
| 1213 | if (size <= 0) { | ||
| 1214 | throw new IllegalArgumentException("invalid receive size"); | ||
| 1215 | } | ||
| 1216 | if (isClosed()) | ||
| 1217 | throw new SocketException("Socket is closed"); | ||
| 1218 | getImpl().setOption(SocketOptions.SO_RCVBUF, new Integer(size)); | ||
| 1219 | } | ||
| 1220 | |||
| 1221 | /** | ||
| 1222 | * Gets the value of the SO_RCVBUF option for this <tt>Socket</tt>, | ||
| 1223 | * that is the buffer size used by the platform for | ||
| 1224 | * input on this <tt>Socket</tt>. | ||
| 1225 | * | ||
| 1226 | * @return the value of the SO_RCVBUF option for this <tt>Socket</tt>. | ||
| 1227 | * @exception SocketException if there is an error | ||
| 1228 | * in the underlying protocol, such as a TCP error. | ||
| 1229 | * @see #setReceiveBufferSize(int) | ||
| 1230 | * @since 1.2 | ||
| 1231 | */ | ||
| 1232 | public synchronized int getReceiveBufferSize() | ||
| 1233 | throws SocketException{ | ||
| 1234 | if (isClosed()) | ||
| 1235 | throw new SocketException("Socket is closed"); | ||
| 1236 | int result = 0; | ||
| 1237 | Object o = getImpl().getOption(SocketOptions.SO_RCVBUF); | ||
| 1238 | if (o instanceof Integer) { | ||
| 1239 | result = ((Integer)o).intValue(); | ||
| 1240 | } | ||
| 1241 | return result; | ||
| 1242 | } | ||
| 1243 | |||
| 1244 | /** | ||
| 1245 | * Enable/disable SO_KEEPALIVE. | ||
| 1246 | * | ||
| 1247 | * @param on whether or not to have socket keep alive turned on. | ||
| 1248 | * @exception SocketException if there is an error | ||
| 1249 | * in the underlying protocol, such as a TCP error. | ||
| 1250 | * @since 1.3 | ||
| 1251 | * @see #getKeepAlive() | ||
| 1252 | */ | ||
| 1253 | public void setKeepAlive(boolean on) throws SocketException { | ||
| 1254 | if (isClosed()) | ||
| 1255 | throw new SocketException("Socket is closed"); | ||
| 1256 | getImpl().setOption(SocketOptions.SO_KEEPALIVE, Boolean.valueOf(on)); | ||
| 1257 | } | ||
| 1258 | |||
| 1259 | /** | ||
| 1260 | * Tests if SO_KEEPALIVE is enabled. | ||
| 1261 | * | ||
| 1262 | * @return a <code>boolean</code> indicating whether or not SO_KEEPALIVE is enabled. | ||
| 1263 | * @exception SocketException if there is an error | ||
| 1264 | * in the underlying protocol, such as a TCP error. | ||
| 1265 | * @since 1.3 | ||
| 1266 | * @see #setKeepAlive(boolean) | ||
| 1267 | */ | ||
| 1268 | public boolean getKeepAlive() throws SocketException { | ||
| 1269 | if (isClosed()) | ||
| 1270 | throw new SocketException("Socket is closed"); | ||
| 1271 | return ((Boolean) getImpl().getOption(SocketOptions.SO_KEEPALIVE)).booleanValue(); | ||
| 1272 | } | ||
| 1273 | |||
| 1274 | /** | ||
| 1275 | * Sets traffic class or type-of-service octet in the IP | ||
| 1276 | * header for packets sent from this Socket. | ||
| 1277 | * As the underlying network implementation may ignore this | ||
| 1278 | * value applications should consider it a hint. | ||
| 1279 | * | ||
| 1280 | * <P> The tc <B>must</B> be in the range <code> 0 <= tc <= | ||
| 1281 | * 255</code> or an IllegalArgumentException will be thrown. | ||
| 1282 | * <p>Notes: | ||
| 1283 | * <p>For Internet Protocol v4 the value consists of an | ||
| 1284 | * <code>integer</code>, the least significant 8 bits of which | ||
| 1285 | * represent the value of the TOS octet in IP packets sent by | ||
| 1286 | * the socket. | ||
| 1287 | * RFC 1349 defines the TOS values as follows: | ||
| 1288 | * <p> | ||
| 1289 | * <UL> | ||
| 1290 | * <LI><CODE>IPTOS_LOWCOST (0x02)</CODE></LI> | ||
| 1291 | * <LI><CODE>IPTOS_RELIABILITY (0x04)</CODE></LI> | ||
| 1292 | * <LI><CODE>IPTOS_THROUGHPUT (0x08)</CODE></LI> | ||
| 1293 | * <LI><CODE>IPTOS_LOWDELAY (0x10)</CODE></LI> | ||
| 1294 | * </UL> | ||
| 1295 | * The last low order bit is always ignored as this | ||
| 1296 | * corresponds to the MBZ (must be zero) bit. | ||
| 1297 | * <p> | ||
| 1298 | * Setting bits in the precedence field may result in a | ||
| 1299 | * SocketException indicating that the operation is not | ||
| 1300 | * permitted. | ||
| 1301 | * <p> | ||
| 1302 | * As RFC 1122 section 4.2.4.2 indicates, a compliant TCP | ||
| 1303 | * implementation should, but is not required to, let application | ||
| 1304 | * change the TOS field during the lifetime of a connection. | ||
| 1305 | * So whether the type-of-service field can be changed after the | ||
| 1306 | * TCP connection has been established depends on the implementation | ||
| 1307 | * in the underlying platform. Applications should not assume that | ||
| 1308 | * they can change the TOS field after the connection. | ||
| 1309 | * <p> | ||
| 1310 | * For Internet Protocol v6 <code>tc</code> is the value that | ||
| 1311 | * would be placed into the sin6_flowinfo field of the IP header. | ||
| 1312 | * | ||
| 1313 | * @param tc an <code>int</code> value for the bitset. | ||
| 1314 | * @throws SocketException if there is an error setting the | ||
| 1315 | * traffic class or type-of-service | ||
| 1316 | * @since 1.4 | ||
| 1317 | * @see #getTrafficClass | ||
| 1318 | */ | ||
| 1319 | public void setTrafficClass(int tc) throws SocketException { | ||
| 1320 | if (tc < 0 || tc > 255) | ||
| 1321 | throw new IllegalArgumentException("tc is not in range 0 -- 255"); | ||
| 1322 | |||
| 1323 | if (isClosed()) | ||
| 1324 | throw new SocketException("Socket is closed"); | ||
| 1325 | getImpl().setOption(SocketOptions.IP_TOS, new Integer(tc)); | ||
| 1326 | } | ||
| 1327 | |||
| 1328 | /** | ||
| 1329 | * Gets traffic class or type-of-service in the IP header | ||
| 1330 | * for packets sent from this Socket | ||
| 1331 | * <p> | ||
| 1332 | * As the underlying network implementation may ignore the | ||
| 1333 | * traffic class or type-of-service set using {@link #setTrafficClass(int)} | ||
| 1334 | * this method may return a different value than was previously | ||
| 1335 | * set using the {@link #setTrafficClass(int)} method on this Socket. | ||
| 1336 | * | ||
| 1337 | * @return the traffic class or type-of-service already set | ||
| 1338 | * @throws SocketException if there is an error obtaining the | ||
| 1339 | * traffic class or type-of-service value. | ||
| 1340 | * @since 1.4 | ||
| 1341 | * @see #setTrafficClass(int) | ||
| 1342 | */ | ||
| 1343 | public int getTrafficClass() throws SocketException { | ||
| 1344 | return ((Integer) (getImpl().getOption(SocketOptions.IP_TOS))).intValue(); | ||
| 1345 | } | ||
| 1346 | |||
| 1347 | /** | ||
| 1348 | * Enable/disable the SO_REUSEADDR socket option. | ||
| 1349 | * <p> | ||
| 1350 | * When a TCP connection is closed the connection may remain | ||
| 1351 | * in a timeout state for a period of time after the connection | ||
| 1352 | * is closed (typically known as the <tt>TIME_WAIT</tt> state | ||
| 1353 | * or <tt>2MSL</tt> wait state). | ||
| 1354 | * For applications using a well known socket address or port | ||
| 1355 | * it may not be possible to bind a socket to the required | ||
| 1356 | * <tt>SocketAddress</tt> if there is a connection in the | ||
| 1357 | * timeout state involving the socket address or port. | ||
| 1358 | * <p> | ||
| 1359 | * Enabling <tt>SO_REUSEADDR</tt> prior to binding the socket | ||
| 1360 | * using {@link #bind(SocketAddress)} allows the socket to be | ||
| 1361 | * bound even though a previous connection is in a timeout | ||
| 1362 | * state. | ||
| 1363 | * <p> | ||
| 1364 | * When a <tt>Socket</tt> is created the initial setting | ||
| 1365 | * of <tt>SO_REUSEADDR</tt> is disabled. | ||
| 1366 | * <p> | ||
| 1367 | * The behaviour when <tt>SO_REUSEADDR</tt> is enabled or | ||
| 1368 | * disabled after a socket is bound (See {@link #isBound()}) | ||
| 1369 | * is not defined. | ||
| 1370 | * | ||
| 1371 | * @param on whether to enable or disable the socket option | ||
| 1372 | * @exception SocketException if an error occurs enabling or | ||
| 1373 | * disabling the <tt>SO_RESUEADDR</tt> socket option, | ||
| 1374 | * or the socket is closed. | ||
| 1375 | * @since 1.4 | ||
| 1376 | * @see #getReuseAddress() | ||
| 1377 | * @see #bind(SocketAddress) | ||
| 1378 | * @see #isClosed() | ||
| 1379 | * @see #isBound() | ||
| 1380 | */ | ||
| 1381 | public void setReuseAddress(boolean on) throws SocketException { | ||
| 1382 | if (isClosed()) | ||
| 1383 | throw new SocketException("Socket is closed"); | ||
| 1384 | getImpl().setOption(SocketOptions.SO_REUSEADDR, Boolean.valueOf(on)); | ||
| 1385 | } | ||
| 1386 | |||
| 1387 | /** | ||
| 1388 | * Tests if SO_REUSEADDR is enabled. | ||
| 1389 | * | ||
| 1390 | * @return a <code>boolean</code> indicating whether or not SO_REUSEADDR is enabled. | ||
| 1391 | * @exception SocketException if there is an error | ||
| 1392 | * in the underlying protocol, such as a TCP error. | ||
| 1393 | * @since 1.4 | ||
| 1394 | * @see #setReuseAddress(boolean) | ||
| 1395 | */ | ||
| 1396 | public boolean getReuseAddress() throws SocketException { | ||
| 1397 | if (isClosed()) | ||
| 1398 | throw new SocketException("Socket is closed"); | ||
| 1399 | return ((Boolean) (getImpl().getOption(SocketOptions.SO_REUSEADDR))).booleanValue(); | ||
| 1400 | } | ||
| 1401 | |||
| 1402 | /** | ||
| 1403 | * Closes this socket. | ||
| 1404 | * <p> | ||
| 1405 | * Any thread currently blocked in an I/O operation upon this socket | ||
| 1406 | * will throw a {@link SocketException}. | ||
| 1407 | * <p> | ||
| 1408 | * Once a socket has been closed, it is not available for further networking | ||
| 1409 | * use (i.e. can't be reconnected or rebound). A new socket needs to be | ||
| 1410 | * created. | ||
| 1411 | * | ||
| 1412 | * <p> Closing this socket will also close the socket's | ||
| 1413 | * {@link java.io.InputStream InputStream} and | ||
| 1414 | * {@link java.io.OutputStream OutputStream}. | ||
| 1415 | * | ||
| 1416 | * <p> If this socket has an associated channel then the channel is closed | ||
| 1417 | * as well. | ||
| 1418 | * | ||
| 1419 | * @exception IOException if an I/O error occurs when closing this socket. | ||
| 1420 | * @revised 1.4 | ||
| 1421 | * @spec JSR-51 | ||
| 1422 | * @see #isClosed | ||
| 1423 | */ | ||
| 1424 | public synchronized void close() throws IOException { | ||
| 1425 | synchronized(closeLock) { | ||
| 1426 | if (isClosed()) | ||
| 1427 | return; | ||
| 1428 | if (created) | ||
| 1429 | impl.close(); | ||
| 1430 | closed = true; | ||
| 1431 | } | ||
| 1432 | } | ||
| 1433 | |||
| 1434 | /** | ||
| 1435 | * Places the input stream for this socket at "end of stream". | ||
| 1436 | * Any data sent to the input stream side of the socket is acknowledged | ||
| 1437 | * and then silently discarded. | ||
| 1438 | * <p> | ||
| 1439 | * If you read from a socket input stream after invoking | ||
| 1440 | * shutdownInput() on the socket, the stream will return EOF. | ||
| 1441 | * | ||
| 1442 | * @exception IOException if an I/O error occurs when shutting down this | ||
| 1443 | * socket. | ||
| 1444 | * | ||
| 1445 | * @since 1.3 | ||
| 1446 | * @see java.net.Socket#shutdownOutput() | ||
| 1447 | * @see java.net.Socket#close() | ||
| 1448 | * @see java.net.Socket#setSoLinger(boolean, int) | ||
| 1449 | * @see #isInputShutdown | ||
| 1450 | */ | ||
| 1451 | public void shutdownInput() throws IOException | ||
| 1452 | { | ||
| 1453 | if (isClosed()) | ||
| 1454 | throw new SocketException("Socket is closed"); | ||
| 1455 | if (!isConnected()) | ||
| 1456 | throw new SocketException("Socket is not connected"); | ||
| 1457 | if (isInputShutdown()) | ||
| 1458 | throw new SocketException("Socket input is already shutdown"); | ||
| 1459 | getImpl().shutdownInput(); | ||
| 1460 | shutIn = true; | ||
| 1461 | } | ||
| 1462 | |||
| 1463 | /** | ||
| 1464 | * Disables the output stream for this socket. | ||
| 1465 | * For a TCP socket, any previously written data will be sent | ||
| 1466 | * followed by TCP's normal connection termination sequence. | ||
| 1467 | * | ||
| 1468 | * If you write to a socket output stream after invoking | ||
| 1469 | * shutdownOutput() on the socket, the stream will throw | ||
| 1470 | * an IOException. | ||
| 1471 | * | ||
| 1472 | * @exception IOException if an I/O error occurs when shutting down this | ||
| 1473 | * socket. | ||
| 1474 | * | ||
| 1475 | * @since 1.3 | ||
| 1476 | * @see java.net.Socket#shutdownInput() | ||
| 1477 | * @see java.net.Socket#close() | ||
| 1478 | * @see java.net.Socket#setSoLinger(boolean, int) | ||
| 1479 | * @see #isOutputShutdown | ||
| 1480 | */ | ||
| 1481 | public void shutdownOutput() throws IOException | ||
| 1482 | { | ||
| 1483 | if (isClosed()) | ||
| 1484 | throw new SocketException("Socket is closed"); | ||
| 1485 | if (!isConnected()) | ||
| 1486 | throw new SocketException("Socket is not connected"); | ||
| 1487 | if (isOutputShutdown()) | ||
| 1488 | throw new SocketException("Socket output is already shutdown"); | ||
| 1489 | getImpl().shutdownOutput(); | ||
| 1490 | shutOut = true; | ||
| 1491 | } | ||
| 1492 | |||
| 1493 | /** | ||
| 1494 | * Converts this socket to a <code>String</code>. | ||
| 1495 | * | ||
| 1496 | * @return a string representation of this socket. | ||
| 1497 | */ | ||
| 1498 | public String toString() { | ||
| 1499 | try { | ||
| 1500 | if (isConnected()) | ||
| 1501 | return "Socket[addr=" + getImpl().getInetAddress() + | ||
| 1502 | ",port=" + getImpl().getPort() + | ||
| 1503 | ",localport=" + getImpl().getLocalPort() + "]"; | ||
| 1504 | } catch (SocketException e) { | ||
| 1505 | } | ||
| 1506 | return "Socket[unconnected]"; | ||
| 1507 | } | ||
| 1508 | |||
| 1509 | /** | ||
| 1510 | * Returns the connection state of the socket. | ||
| 1511 | * <p> | ||
| 1512 | * Note: Closing a socket doesn't clear its connection state, which means | ||
| 1513 | * this method will return <code>true</code> for a closed socket | ||
| 1514 | * (see {@link #isClosed()}) if it was successfuly connected prior | ||
| 1515 | * to being closed. | ||
| 1516 | * | ||
| 1517 | * @return true if the socket was successfuly connected to a server | ||
| 1518 | * @since 1.4 | ||
| 1519 | */ | ||
| 1520 | public boolean isConnected() { | ||
| 1521 | // Before 1.3 Sockets were always connected during creation | ||
| 1522 | return connected || oldImpl; | ||
| 1523 | } | ||
| 1524 | |||
| 1525 | /** | ||
| 1526 | * Returns the binding state of the socket. | ||
| 1527 | * <p> | ||
| 1528 | * Note: Closing a socket doesn't clear its binding state, which means | ||
| 1529 | * this method will return <code>true</code> for a closed socket | ||
| 1530 | * (see {@link #isClosed()}) if it was successfuly bound prior | ||
| 1531 | * to being closed. | ||
| 1532 | * | ||
| 1533 | * @return true if the socket was successfuly bound to an address | ||
| 1534 | * @since 1.4 | ||
| 1535 | * @see #bind | ||
| 1536 | */ | ||
| 1537 | public boolean isBound() { | ||
| 1538 | // Before 1.3 Sockets were always bound during creation | ||
| 1539 | return bound || oldImpl; | ||
| 1540 | } | ||
| 1541 | |||
| 1542 | /** | ||
| 1543 | * Returns the closed state of the socket. | ||
| 1544 | * | ||
| 1545 | * @return true if the socket has been closed | ||
| 1546 | * @since 1.4 | ||
| 1547 | * @see #close | ||
| 1548 | */ | ||
| 1549 | public boolean isClosed() { | ||
| 1550 | synchronized(closeLock) { | ||
| 1551 | return closed; | ||
| 1552 | } | ||
| 1553 | } | ||
| 1554 | |||
| 1555 | /** | ||
| 1556 | * Returns whether the read-half of the socket connection is closed. | ||
| 1557 | * | ||
| 1558 | * @return true if the input of the socket has been shutdown | ||
| 1559 | * @since 1.4 | ||
| 1560 | * @see #shutdownInput | ||
| 1561 | */ | ||
| 1562 | public boolean isInputShutdown() { | ||
| 1563 | return shutIn; | ||
| 1564 | } | ||
| 1565 | |||
| 1566 | /** | ||
| 1567 | * Returns whether the write-half of the socket connection is closed. | ||
| 1568 | * | ||
| 1569 | * @return true if the output of the socket has been shutdown | ||
| 1570 | * @since 1.4 | ||
| 1571 | * @see #shutdownOutput | ||
| 1572 | */ | ||
| 1573 | public boolean isOutputShutdown() { | ||
| 1574 | return shutOut; | ||
| 1575 | } | ||
| 1576 | |||
| 1577 | /** | ||
| 1578 | * The factory for all client sockets. | ||
| 1579 | */ | ||
| 1580 | private static SocketImplFactory factory = null; | ||
| 1581 | |||
| 1582 | /** | ||
| 1583 | * Sets the client socket implementation factory for the | ||
| 1584 | * application. The factory can be specified only once. | ||
| 1585 | * <p> | ||
| 1586 | * When an application creates a new client socket, the socket | ||
| 1587 | * implementation factory's <code>createSocketImpl</code> method is | ||
| 1588 | * called to create the actual socket implementation. | ||
| 1589 | * <p> | ||
| 1590 | * Passing <code>null</code> to the method is a no-op unless the factory | ||
| 1591 | * was already set. | ||
| 1592 | * <p>If there is a security manager, this method first calls | ||
| 1593 | * the security manager's <code>checkSetFactory</code> method | ||
| 1594 | * to ensure the operation is allowed. | ||
| 1595 | * This could result in a SecurityException. | ||
| 1596 | * | ||
| 1597 | * @param fac the desired factory. | ||
| 1598 | * @exception IOException if an I/O error occurs when setting the | ||
| 1599 | * socket factory. | ||
| 1600 | * @exception SocketException if the factory is already defined. | ||
| 1601 | * @exception SecurityException if a security manager exists and its | ||
| 1602 | * <code>checkSetFactory</code> method doesn't allow the operation. | ||
| 1603 | * @see java.net.SocketImplFactory#createSocketImpl() | ||
| 1604 | * @see SecurityManager#checkSetFactory | ||
| 1605 | */ | ||
| 1606 | public static synchronized void setSocketImplFactory(SocketImplFactory fac) | ||
| 1607 | throws IOException | ||
| 1608 | { | ||
| 1609 | if (factory != null) { | ||
| 1610 | throw new SocketException("factory already defined"); | ||
| 1611 | } | ||
| 1612 | SecurityManager security = System.getSecurityManager(); | ||
| 1613 | if (security != null) { | ||
| 1614 | security.checkSetFactory(); | ||
| 1615 | } | ||
| 1616 | factory = fac; | ||
| 1617 | } | ||
| 1618 | |||
| 1619 | /** | ||
| 1620 | * Sets performance preferences for this socket. | ||
| 1621 | * | ||
| 1622 | * <p> Sockets use the TCP/IP protocol by default. Some implementations | ||
| 1623 | * may offer alternative protocols which have different performance | ||
| 1624 | * characteristics than TCP/IP. This method allows the application to | ||
| 1625 | * express its own preferences as to how these tradeoffs should be made | ||
| 1626 | * when the implementation chooses from the available protocols. | ||
| 1627 | * | ||
| 1628 | * <p> Performance preferences are described by three integers | ||
| 1629 | * whose values indicate the relative importance of short connection time, | ||
| 1630 | * low latency, and high bandwidth. The absolute values of the integers | ||
| 1631 | * are irrelevant; in order to choose a protocol the values are simply | ||
| 1632 | * compared, with larger values indicating stronger preferences. Negative | ||
| 1633 | * values represent a lower priority than positive values. If the | ||
| 1634 | * application prefers short connection time over both low latency and high | ||
| 1635 | * bandwidth, for example, then it could invoke this method with the values | ||
| 1636 | * <tt>(1, 0, 0)</tt>. If the application prefers high bandwidth above low | ||
| 1637 | * latency, and low latency above short connection time, then it could | ||
| 1638 | * invoke this method with the values <tt>(0, 1, 2)</tt>. | ||
| 1639 | * | ||
| 1640 | * <p> Invoking this method after this socket has been connected | ||
| 1641 | * will have no effect. | ||
| 1642 | * | ||
| 1643 | * @param connectionTime | ||
| 1644 | * An <tt>int</tt> expressing the relative importance of a short | ||
| 1645 | * connection time | ||
| 1646 | * | ||
| 1647 | * @param latency | ||
| 1648 | * An <tt>int</tt> expressing the relative importance of low | ||
| 1649 | * latency | ||
| 1650 | * | ||
| 1651 | * @param bandwidth | ||
| 1652 | * An <tt>int</tt> expressing the relative importance of high | ||
| 1653 | * bandwidth | ||
| 1654 | * | ||
| 1655 | * @since 1.5 | ||
| 1656 | */ | ||
| 1657 | public void setPerformancePreferences(int connectionTime, | ||
| 1658 | int latency, | ||
| 1659 | int bandwidth) | ||
| 1660 | { | ||
| 1661 | /* Not implemented yet */ | ||
| 1662 | } | ||
| 1663 | } | ||