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| 1 | +/* | |
| 2 | + * Copyright (c) 1996, 2011, 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.FileDescriptor; | |
| 28 | +import java.io.IOException; | |
| 29 | +import java.io.InterruptedIOException; | |
| 30 | +import java.util.Enumeration; | |
| 31 | +import sun.net.ResourceManager; | |
| 32 | + | |
| 33 | +/** | |
| 34 | + * Abstract datagram and multicast socket implementation base class. | |
| 35 | + * Note: This is not a public class, so that applets cannot call | |
| 36 | + * into the implementation directly and hence cannot bypass the | |
| 37 | + * security checks present in the DatagramSocket and MulticastSocket | |
| 38 | + * classes. | |
| 39 | + * | |
| 40 | + * @author Pavani Diwanji | |
| 41 | + */ | |
| 42 | + | |
| 43 | +abstract class AbstractPlainDatagramSocketImpl extends DatagramSocketImpl | |
| 44 | +{ | |
| 45 | + /* timeout value for receive() */ | |
| 46 | + int timeout = 0; | |
| 47 | + boolean connected = false; | |
| 48 | + private int trafficClass = 0; | |
| 49 | + private InetAddress connectedAddress = null; | |
| 50 | + private int connectedPort = -1; | |
| 51 | + | |
| 52 | + /* cached socket options */ | |
| 53 | + private int multicastInterface = 0; | |
| 54 | + private boolean loopbackMode = true; | |
| 55 | + private int ttl = -1; | |
| 56 | + | |
| 57 | + /** | |
| 58 | + * Load net library into runtime. | |
| 59 | + */ | |
| 60 | + static { | |
| 61 | + java.security.AccessController.doPrivileged( | |
| 62 | + new sun.security.action.LoadLibraryAction("net")); | |
| 63 | + } | |
| 64 | + | |
| 65 | + /** | |
| 66 | + * Creates a datagram socket | |
| 67 | + */ | |
| 68 | + protected synchronized void create() throws SocketException { | |
| 69 | + fd = new FileDescriptor(); | |
| 70 | + ResourceManager.beforeUdpCreate(); | |
| 71 | + try { | |
| 72 | + datagramSocketCreate(); | |
| 73 | + } catch (SocketException ioe) { | |
| 74 | + ResourceManager.afterUdpClose(); | |
| 75 | + fd = null; | |
| 76 | + throw ioe; | |
| 77 | + } | |
| 78 | + } | |
| 79 | + | |
| 80 | + /** | |
| 81 | + * Binds a datagram socket to a local port. | |
| 82 | + */ | |
| 83 | + protected synchronized void bind(int lport, InetAddress laddr) | |
| 84 | + throws SocketException { | |
| 85 | + bind0(lport, laddr); | |
| 86 | + } | |
| 87 | + | |
| 88 | + protected abstract void bind0(int lport, InetAddress laddr) | |
| 89 | + throws SocketException; | |
| 90 | + | |
| 91 | + /** | |
| 92 | + * Sends a datagram packet. The packet contains the data and the | |
| 93 | + * destination address to send the packet to. | |
| 94 | + * @param packet to be sent. | |
| 95 | + */ | |
| 96 | + protected abstract void send(DatagramPacket p) throws IOException; | |
| 97 | + | |
| 98 | + /** | |
| 99 | + * Connects a datagram socket to a remote destination. This associates the remote | |
| 100 | + * address with the local socket so that datagrams may only be sent to this destination | |
| 101 | + * and received from this destination. | |
| 102 | + * @param address the remote InetAddress to connect to | |
| 103 | + * @param port the remote port number | |
| 104 | + */ | |
| 105 | + protected void connect(InetAddress address, int port) throws SocketException { | |
| 106 | + connect0(address, port); | |
| 107 | + connectedAddress = address; | |
| 108 | + connectedPort = port; | |
| 109 | + connected = true; | |
| 110 | + } | |
| 111 | + | |
| 112 | + /** | |
| 113 | + * Disconnects a previously connected socket. Does nothing if the socket was | |
| 114 | + * not connected already. | |
| 115 | + */ | |
| 116 | + protected void disconnect() { | |
| 117 | + disconnect0(connectedAddress.family); | |
| 118 | + connected = false; | |
| 119 | + connectedAddress = null; | |
| 120 | + connectedPort = -1; | |
| 121 | + } | |
| 122 | + | |
| 123 | + /** | |
| 124 | + * Peek at the packet to see who it is from. | |
| 125 | + * @param return the address which the packet came from. | |
| 126 | + */ | |
| 127 | + protected abstract int peek(InetAddress i) throws IOException; | |
| 128 | + protected abstract int peekData(DatagramPacket p) throws IOException; | |
| 129 | + /** | |
| 130 | + * Receive the datagram packet. | |
| 131 | + * @param Packet Received. | |
| 132 | + */ | |
| 133 | + protected synchronized void receive(DatagramPacket p) | |
| 134 | + throws IOException { | |
| 135 | + receive0(p); | |
| 136 | + } | |
| 137 | + | |
| 138 | + protected abstract void receive0(DatagramPacket p) | |
| 139 | + throws IOException; | |
| 140 | + | |
| 141 | + /** | |
| 142 | + * Set the TTL (time-to-live) option. | |
| 143 | + * @param TTL to be set. | |
| 144 | + */ | |
| 145 | + protected abstract void setTimeToLive(int ttl) throws IOException; | |
| 146 | + | |
| 147 | + /** | |
| 148 | + * Get the TTL (time-to-live) option. | |
| 149 | + */ | |
| 150 | + protected abstract int getTimeToLive() throws IOException; | |
| 151 | + | |
| 152 | + /** | |
| 153 | + * Set the TTL (time-to-live) option. | |
| 154 | + * @param TTL to be set. | |
| 155 | + */ | |
| 156 | + protected abstract void setTTL(byte ttl) throws IOException; | |
| 157 | + | |
| 158 | + /** | |
| 159 | + * Get the TTL (time-to-live) option. | |
| 160 | + */ | |
| 161 | + protected abstract byte getTTL() throws IOException; | |
| 162 | + | |
| 163 | + /** | |
| 164 | + * Join the multicast group. | |
| 165 | + * @param multicast address to join. | |
| 166 | + */ | |
| 167 | + protected void join(InetAddress inetaddr) throws IOException { | |
| 168 | + join(inetaddr, null); | |
| 169 | + } | |
| 170 | + | |
| 171 | + /** | |
| 172 | + * Leave the multicast group. | |
| 173 | + * @param multicast address to leave. | |
| 174 | + */ | |
| 175 | + protected void leave(InetAddress inetaddr) throws IOException { | |
| 176 | + leave(inetaddr, null); | |
| 177 | + } | |
| 178 | + /** | |
| 179 | + * Join the multicast group. | |
| 180 | + * @param multicast address to join. | |
| 181 | + * @param netIf specifies the local interface to receive multicast | |
| 182 | + * datagram packets | |
| 183 | + * @throws IllegalArgumentException if mcastaddr is null or is a | |
| 184 | + * SocketAddress subclass not supported by this socket | |
| 185 | + * @since 1.4 | |
| 186 | + */ | |
| 187 | + | |
| 188 | + protected void joinGroup(SocketAddress mcastaddr, NetworkInterface netIf) | |
| 189 | + throws IOException { | |
| 190 | + if (mcastaddr == null || !(mcastaddr instanceof InetSocketAddress)) | |
| 191 | + throw new IllegalArgumentException("Unsupported address type"); | |
| 192 | + join(((InetSocketAddress)mcastaddr).getAddress(), netIf); | |
| 193 | + } | |
| 194 | + | |
| 195 | + protected abstract void join(InetAddress inetaddr, NetworkInterface netIf) | |
| 196 | + throws IOException; | |
| 197 | + | |
| 198 | + /** | |
| 199 | + * Leave the multicast group. | |
| 200 | + * @param multicast address to leave. | |
| 201 | + * @param netIf specified the local interface to leave the group at | |
| 202 | + * @throws IllegalArgumentException if mcastaddr is null or is a | |
| 203 | + * SocketAddress subclass not supported by this socket | |
| 204 | + * @since 1.4 | |
| 205 | + */ | |
| 206 | + protected void leaveGroup(SocketAddress mcastaddr, NetworkInterface netIf) | |
| 207 | + throws IOException { | |
| 208 | + if (mcastaddr == null || !(mcastaddr instanceof InetSocketAddress)) | |
| 209 | + throw new IllegalArgumentException("Unsupported address type"); | |
| 210 | + leave(((InetSocketAddress)mcastaddr).getAddress(), netIf); | |
| 211 | + } | |
| 212 | + | |
| 213 | + protected abstract void leave(InetAddress inetaddr, NetworkInterface netIf) | |
| 214 | + throws IOException; | |
| 215 | + | |
| 216 | + /** | |
| 217 | + * Close the socket. | |
| 218 | + */ | |
| 219 | + protected void close() { | |
| 220 | + if (fd != null) { | |
| 221 | + datagramSocketClose(); | |
| 222 | + ResourceManager.afterUdpClose(); | |
| 223 | + fd = null; | |
| 224 | + } | |
| 225 | + } | |
| 226 | + | |
| 227 | + protected boolean isClosed() { | |
| 228 | + return (fd == null) ? true : false; | |
| 229 | + } | |
| 230 | + | |
| 231 | + protected void finalize() { | |
| 232 | + close(); | |
| 233 | + } | |
| 234 | + | |
| 235 | + /** | |
| 236 | + * set a value - since we only support (setting) binary options | |
| 237 | + * here, o must be a Boolean | |
| 238 | + */ | |
| 239 | + | |
| 240 | + public void setOption(int optID, Object o) throws SocketException { | |
| 241 | + if (isClosed()) { | |
| 242 | + throw new SocketException("Socket Closed"); | |
| 243 | + } | |
| 244 | + switch (optID) { | |
| 245 | + /* check type safety b4 going native. These should never | |
| 246 | + * fail, since only java.Socket* has access to | |
| 247 | + * PlainSocketImpl.setOption(). | |
| 248 | + */ | |
| 249 | + case SO_TIMEOUT: | |
| 250 | + if (o == null || !(o instanceof Integer)) { | |
| 251 | + throw new SocketException("bad argument for SO_TIMEOUT"); | |
| 252 | + } | |
| 253 | + int tmp = ((Integer) o).intValue(); | |
| 254 | + if (tmp < 0) | |
| 255 | + throw new IllegalArgumentException("timeout < 0"); | |
| 256 | + timeout = tmp; | |
| 257 | + return; | |
| 258 | + case IP_TOS: | |
| 259 | + if (o == null || !(o instanceof Integer)) { | |
| 260 | + throw new SocketException("bad argument for IP_TOS"); | |
| 261 | + } | |
| 262 | + trafficClass = ((Integer)o).intValue(); | |
| 263 | + break; | |
| 264 | + case SO_REUSEADDR: | |
| 265 | + if (o == null || !(o instanceof Boolean)) { | |
| 266 | + throw new SocketException("bad argument for SO_REUSEADDR"); | |
| 267 | + } | |
| 268 | + break; | |
| 269 | + case SO_BROADCAST: | |
| 270 | + if (o == null || !(o instanceof Boolean)) { | |
| 271 | + throw new SocketException("bad argument for SO_BROADCAST"); | |
| 272 | + } | |
| 273 | + break; | |
| 274 | + case SO_BINDADDR: | |
| 275 | + throw new SocketException("Cannot re-bind Socket"); | |
| 276 | + case SO_RCVBUF: | |
| 277 | + case SO_SNDBUF: | |
| 278 | + if (o == null || !(o instanceof Integer) || | |
| 279 | + ((Integer)o).intValue() < 0) { | |
| 280 | + throw new SocketException("bad argument for SO_SNDBUF or " + | |
| 281 | + "SO_RCVBUF"); | |
| 282 | + } | |
| 283 | + break; | |
| 284 | + case IP_MULTICAST_IF: | |
| 285 | + if (o == null || !(o instanceof InetAddress)) | |
| 286 | + throw new SocketException("bad argument for IP_MULTICAST_IF"); | |
| 287 | + break; | |
| 288 | + case IP_MULTICAST_IF2: | |
| 289 | + if (o == null || !(o instanceof NetworkInterface)) | |
| 290 | + throw new SocketException("bad argument for IP_MULTICAST_IF2"); | |
| 291 | + break; | |
| 292 | + case IP_MULTICAST_LOOP: | |
| 293 | + if (o == null || !(o instanceof Boolean)) | |
| 294 | + throw new SocketException("bad argument for IP_MULTICAST_LOOP"); | |
| 295 | + break; | |
| 296 | + default: | |
| 297 | + throw new SocketException("invalid option: " + optID); | |
| 298 | + } | |
| 299 | + socketSetOption(optID, o); | |
| 300 | + } | |
| 301 | + | |
| 302 | + /* | |
| 303 | + * get option's state - set or not | |
| 304 | + */ | |
| 305 | + | |
| 306 | + public Object getOption(int optID) throws SocketException { | |
| 307 | + if (isClosed()) { | |
| 308 | + throw new SocketException("Socket Closed"); | |
| 309 | + } | |
| 310 | + | |
| 311 | + Object result; | |
| 312 | + | |
| 313 | + switch (optID) { | |
| 314 | + case SO_TIMEOUT: | |
| 315 | + result = new Integer(timeout); | |
| 316 | + break; | |
| 317 | + | |
| 318 | + case IP_TOS: | |
| 319 | + result = socketGetOption(optID); | |
| 320 | + if ( ((Integer)result).intValue() == -1) { | |
| 321 | + result = new Integer(trafficClass); | |
| 322 | + } | |
| 323 | + break; | |
| 324 | + | |
| 325 | + case SO_BINDADDR: | |
| 326 | + case IP_MULTICAST_IF: | |
| 327 | + case IP_MULTICAST_IF2: | |
| 328 | + case SO_RCVBUF: | |
| 329 | + case SO_SNDBUF: | |
| 330 | + case IP_MULTICAST_LOOP: | |
| 331 | + case SO_REUSEADDR: | |
| 332 | + case SO_BROADCAST: | |
| 333 | + result = socketGetOption(optID); | |
| 334 | + break; | |
| 335 | + | |
| 336 | + default: | |
| 337 | + throw new SocketException("invalid option: " + optID); | |
| 338 | + } | |
| 339 | + | |
| 340 | + return result; | |
| 341 | + } | |
| 342 | + | |
| 343 | + protected abstract void datagramSocketCreate() throws SocketException; | |
| 344 | + protected abstract void datagramSocketClose(); | |
| 345 | + protected abstract void socketSetOption(int opt, Object val) | |
| 346 | + throws SocketException; | |
| 347 | + protected abstract Object socketGetOption(int opt) throws SocketException; | |
| 348 | + | |
| 349 | + protected abstract void connect0(InetAddress address, int port) throws SocketException; | |
| 350 | + protected abstract void disconnect0(int family); | |
| 351 | + | |
| 352 | +} | |