author | alanb |
Mon, 01 Oct 2012 15:36:57 +0100 | |
changeset 14014 | da3648e13e67 |
parent 12047 | 320a714614e9 |
child 14342 | 8435a30053c1 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved. |
2 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
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* version 2 for more details (a copy is included in the LICENSE file that |
|
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
|
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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||
26 |
package java.net; |
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27 |
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28 |
import java.io.IOException; |
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29 |
import java.nio.channels.DatagramChannel; |
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import java.security.AccessController; |
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31 |
import java.security.PrivilegedExceptionAction; |
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32 |
||
33 |
/** |
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34 |
* This class represents a socket for sending and receiving datagram packets. |
|
35 |
* |
|
36 |
* <p>A datagram socket is the sending or receiving point for a packet |
|
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* delivery service. Each packet sent or received on a datagram socket |
|
38 |
* is individually addressed and routed. Multiple packets sent from |
|
39 |
* one machine to another may be routed differently, and may arrive in |
|
40 |
* any order. |
|
41 |
* |
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* <p> Where possible, a newly constructed {@code DatagramSocket} has the |
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* {@link SocketOptions#SO_BROADCAST SO_BROADCAST} socket option enabled so as |
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* to allow the transmission of broadcast datagrams. In order to receive |
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* broadcast packets a DatagramSocket should be bound to the wildcard address. |
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* In some implementations, broadcast packets may also be received when |
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* a DatagramSocket is bound to a more specific address. |
48 |
* <p> |
|
49 |
* Example: |
|
50 |
* <code> |
|
51 |
* DatagramSocket s = new DatagramSocket(null); |
|
52 |
* s.bind(new InetSocketAddress(8888)); |
|
53 |
* </code> |
|
54 |
* Which is equivalent to: |
|
55 |
* <code> |
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56 |
* DatagramSocket s = new DatagramSocket(8888); |
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* </code> |
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58 |
* Both cases will create a DatagramSocket able to receive broadcasts on |
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* UDP port 8888. |
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60 |
* |
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61 |
* @author Pavani Diwanji |
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* @see java.net.DatagramPacket |
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* @see java.nio.channels.DatagramChannel |
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* @since JDK1.0 |
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65 |
*/ |
|
66 |
public |
|
67 |
class DatagramSocket implements java.io.Closeable { |
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68 |
/** |
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69 |
* Various states of this socket. |
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70 |
*/ |
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71 |
private boolean created = false; |
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72 |
private boolean bound = false; |
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73 |
private boolean closed = false; |
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74 |
private Object closeLock = new Object(); |
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75 |
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76 |
/* |
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77 |
* The implementation of this DatagramSocket. |
|
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*/ |
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DatagramSocketImpl impl; |
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80 |
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81 |
/** |
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* Are we using an older DatagramSocketImpl? |
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*/ |
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boolean oldImpl = false; |
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85 |
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86 |
/* |
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87 |
* Connection state: |
|
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* ST_NOT_CONNECTED = socket not connected |
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* ST_CONNECTED = socket connected |
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90 |
* ST_CONNECTED_NO_IMPL = socket connected but not at impl level |
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91 |
*/ |
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92 |
static final int ST_NOT_CONNECTED = 0; |
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93 |
static final int ST_CONNECTED = 1; |
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94 |
static final int ST_CONNECTED_NO_IMPL = 2; |
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95 |
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96 |
int connectState = ST_NOT_CONNECTED; |
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/* |
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99 |
* Connected address & port |
|
100 |
*/ |
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101 |
InetAddress connectedAddress = null; |
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102 |
int connectedPort = -1; |
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103 |
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104 |
/** |
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105 |
* Connects this socket to a remote socket address (IP address + port number). |
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* Binds socket if not already bound. |
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* <p> |
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* @param address The remote address. |
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* @param port The remote port |
110 |
* @throws SocketException if binding the socket fails. |
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111 |
*/ |
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112 |
private synchronized void connectInternal(InetAddress address, int port) throws SocketException { |
|
113 |
if (port < 0 || port > 0xFFFF) { |
|
114 |
throw new IllegalArgumentException("connect: " + port); |
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115 |
} |
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116 |
if (address == null) { |
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117 |
throw new IllegalArgumentException("connect: null address"); |
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} |
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checkAddress (address, "connect"); |
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if (isClosed()) |
121 |
return; |
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122 |
SecurityManager security = System.getSecurityManager(); |
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123 |
if (security != null) { |
|
124 |
if (address.isMulticastAddress()) { |
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125 |
security.checkMulticast(address); |
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126 |
} else { |
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127 |
security.checkConnect(address.getHostAddress(), port); |
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128 |
security.checkAccept(address.getHostAddress(), port); |
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129 |
} |
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130 |
} |
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131 |
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132 |
if (!isBound()) |
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bind(new InetSocketAddress(0)); |
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// old impls do not support connect/disconnect |
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if (oldImpl || (impl instanceof AbstractPlainDatagramSocketImpl && |
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((AbstractPlainDatagramSocketImpl)impl).nativeConnectDisabled())) { |
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connectState = ST_CONNECTED_NO_IMPL; |
139 |
} else { |
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140 |
try { |
|
141 |
getImpl().connect(address, port); |
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142 |
||
143 |
// socket is now connected by the impl |
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144 |
connectState = ST_CONNECTED; |
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145 |
} catch (SocketException se) { |
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146 |
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147 |
// connection will be emulated by DatagramSocket |
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148 |
connectState = ST_CONNECTED_NO_IMPL; |
|
149 |
} |
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150 |
} |
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151 |
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152 |
connectedAddress = address; |
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153 |
connectedPort = port; |
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154 |
} |
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155 |
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156 |
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157 |
/** |
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158 |
* Constructs a datagram socket and binds it to any available port |
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159 |
* on the local host machine. The socket will be bound to the |
|
160 |
* {@link InetAddress#isAnyLocalAddress wildcard} address, |
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161 |
* an IP address chosen by the kernel. |
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162 |
* |
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* <p>If there is a security manager, |
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164 |
* its <code>checkListen</code> method is first called |
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165 |
* with 0 as its argument to ensure the operation is allowed. |
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166 |
* This could result in a SecurityException. |
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167 |
* |
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168 |
* @exception SocketException if the socket could not be opened, |
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169 |
* or the socket could not bind to the specified local port. |
|
170 |
* @exception SecurityException if a security manager exists and its |
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171 |
* <code>checkListen</code> method doesn't allow the operation. |
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172 |
* |
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173 |
* @see SecurityManager#checkListen |
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174 |
*/ |
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175 |
public DatagramSocket() throws SocketException { |
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this(new InetSocketAddress(0)); |
2 | 177 |
} |
178 |
||
179 |
/** |
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180 |
* Creates an unbound datagram socket with the specified |
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181 |
* DatagramSocketImpl. |
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182 |
* |
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183 |
* @param impl an instance of a <B>DatagramSocketImpl</B> |
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184 |
* the subclass wishes to use on the DatagramSocket. |
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* @since 1.4 |
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186 |
*/ |
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187 |
protected DatagramSocket(DatagramSocketImpl impl) { |
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188 |
if (impl == null) |
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189 |
throw new NullPointerException(); |
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190 |
this.impl = impl; |
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191 |
checkOldImpl(); |
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192 |
} |
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193 |
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194 |
/** |
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195 |
* Creates a datagram socket, bound to the specified local |
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196 |
* socket address. |
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197 |
* <p> |
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198 |
* If, if the address is <code>null</code>, creates an unbound socket. |
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199 |
* <p> |
|
200 |
* <p>If there is a security manager, |
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* its <code>checkListen</code> method is first called |
|
202 |
* with the port from the socket address |
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203 |
* as its argument to ensure the operation is allowed. |
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204 |
* This could result in a SecurityException. |
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205 |
* |
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206 |
* @param bindaddr local socket address to bind, or <code>null</code> |
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207 |
* for an unbound socket. |
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208 |
* |
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209 |
* @exception SocketException if the socket could not be opened, |
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210 |
* or the socket could not bind to the specified local port. |
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211 |
* @exception SecurityException if a security manager exists and its |
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212 |
* <code>checkListen</code> method doesn't allow the operation. |
|
213 |
* |
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214 |
* @see SecurityManager#checkListen |
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215 |
* @since 1.4 |
|
216 |
*/ |
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217 |
public DatagramSocket(SocketAddress bindaddr) throws SocketException { |
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218 |
// create a datagram socket. |
|
219 |
createImpl(); |
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220 |
if (bindaddr != null) { |
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try { |
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222 |
bind(bindaddr); |
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223 |
} finally { |
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if (!isBound()) |
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225 |
close(); |
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226 |
} |
2 | 227 |
} |
228 |
} |
|
229 |
||
230 |
/** |
|
231 |
* Constructs a datagram socket and binds it to the specified port |
|
232 |
* on the local host machine. The socket will be bound to the |
|
233 |
* {@link InetAddress#isAnyLocalAddress wildcard} address, |
|
234 |
* an IP address chosen by the kernel. |
|
235 |
* |
|
236 |
* <p>If there is a security manager, |
|
237 |
* its <code>checkListen</code> method is first called |
|
238 |
* with the <code>port</code> argument |
|
239 |
* as its argument to ensure the operation is allowed. |
|
240 |
* This could result in a SecurityException. |
|
241 |
* |
|
242 |
* @param port port to use. |
|
243 |
* @exception SocketException if the socket could not be opened, |
|
244 |
* or the socket could not bind to the specified local port. |
|
245 |
* @exception SecurityException if a security manager exists and its |
|
246 |
* <code>checkListen</code> method doesn't allow the operation. |
|
247 |
* |
|
248 |
* @see SecurityManager#checkListen |
|
249 |
*/ |
|
250 |
public DatagramSocket(int port) throws SocketException { |
|
251 |
this(port, null); |
|
252 |
} |
|
253 |
||
254 |
/** |
|
255 |
* Creates a datagram socket, bound to the specified local |
|
256 |
* address. The local port must be between 0 and 65535 inclusive. |
|
257 |
* If the IP address is 0.0.0.0, the socket will be bound to the |
|
258 |
* {@link InetAddress#isAnyLocalAddress wildcard} address, |
|
259 |
* an IP address chosen by the kernel. |
|
260 |
* |
|
261 |
* <p>If there is a security manager, |
|
262 |
* its <code>checkListen</code> method is first called |
|
263 |
* with the <code>port</code> argument |
|
264 |
* as its argument to ensure the operation is allowed. |
|
265 |
* This could result in a SecurityException. |
|
266 |
* |
|
267 |
* @param port local port to use |
|
268 |
* @param laddr local address to bind |
|
269 |
* |
|
270 |
* @exception SocketException if the socket could not be opened, |
|
271 |
* or the socket could not bind to the specified local port. |
|
272 |
* @exception SecurityException if a security manager exists and its |
|
273 |
* <code>checkListen</code> method doesn't allow the operation. |
|
274 |
* |
|
275 |
* @see SecurityManager#checkListen |
|
276 |
* @since JDK1.1 |
|
277 |
*/ |
|
278 |
public DatagramSocket(int port, InetAddress laddr) throws SocketException { |
|
279 |
this(new InetSocketAddress(laddr, port)); |
|
280 |
} |
|
281 |
||
282 |
private void checkOldImpl() { |
|
283 |
if (impl == null) |
|
284 |
return; |
|
285 |
// DatagramSocketImpl.peekdata() is a protected method, therefore we need to use |
|
286 |
// getDeclaredMethod, therefore we need permission to access the member |
|
287 |
try { |
|
51 | 288 |
AccessController.doPrivileged( |
289 |
new PrivilegedExceptionAction<Void>() { |
|
290 |
public Void run() throws NoSuchMethodException { |
|
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291 |
Class<?>[] cl = new Class<?>[1]; |
2 | 292 |
cl[0] = DatagramPacket.class; |
293 |
impl.getClass().getDeclaredMethod("peekData", cl); |
|
294 |
return null; |
|
295 |
} |
|
296 |
}); |
|
297 |
} catch (java.security.PrivilegedActionException e) { |
|
298 |
oldImpl = true; |
|
299 |
} |
|
300 |
} |
|
301 |
||
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302 |
static Class<?> implClass = null; |
2 | 303 |
|
304 |
void createImpl() throws SocketException { |
|
305 |
if (impl == null) { |
|
306 |
if (factory != null) { |
|
307 |
impl = factory.createDatagramSocketImpl(); |
|
308 |
checkOldImpl(); |
|
309 |
} else { |
|
310 |
boolean isMulticast = (this instanceof MulticastSocket) ? true : false; |
|
311 |
impl = DefaultDatagramSocketImplFactory.createDatagramSocketImpl(isMulticast); |
|
312 |
||
313 |
checkOldImpl(); |
|
314 |
} |
|
315 |
} |
|
316 |
// creates a udp socket |
|
317 |
impl.create(); |
|
318 |
created = true; |
|
319 |
} |
|
320 |
||
321 |
/** |
|
322 |
* Get the <code>DatagramSocketImpl</code> attached to this socket, |
|
323 |
* creating it if necessary. |
|
324 |
* |
|
325 |
* @return the <code>DatagramSocketImpl</code> attached to that |
|
326 |
* DatagramSocket |
|
327 |
* @throws SocketException if creation fails. |
|
328 |
* @since 1.4 |
|
329 |
*/ |
|
330 |
DatagramSocketImpl getImpl() throws SocketException { |
|
331 |
if (!created) |
|
332 |
createImpl(); |
|
333 |
return impl; |
|
334 |
} |
|
335 |
||
336 |
/** |
|
337 |
* Binds this DatagramSocket to a specific address & port. |
|
338 |
* <p> |
|
339 |
* If the address is <code>null</code>, then the system will pick up |
|
340 |
* an ephemeral port and a valid local address to bind the socket. |
|
341 |
*<p> |
|
342 |
* @param addr The address & port to bind to. |
|
343 |
* @throws SocketException if any error happens during the bind, or if the |
|
344 |
* socket is already bound. |
|
345 |
* @throws SecurityException if a security manager exists and its |
|
346 |
* <code>checkListen</code> method doesn't allow the operation. |
|
347 |
* @throws IllegalArgumentException if addr is a SocketAddress subclass |
|
348 |
* not supported by this socket. |
|
349 |
* @since 1.4 |
|
350 |
*/ |
|
351 |
public synchronized void bind(SocketAddress addr) throws SocketException { |
|
352 |
if (isClosed()) |
|
353 |
throw new SocketException("Socket is closed"); |
|
354 |
if (isBound()) |
|
355 |
throw new SocketException("already bound"); |
|
356 |
if (addr == null) |
|
357 |
addr = new InetSocketAddress(0); |
|
358 |
if (!(addr instanceof InetSocketAddress)) |
|
359 |
throw new IllegalArgumentException("Unsupported address type!"); |
|
360 |
InetSocketAddress epoint = (InetSocketAddress) addr; |
|
361 |
if (epoint.isUnresolved()) |
|
362 |
throw new SocketException("Unresolved address"); |
|
5180
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363 |
InetAddress iaddr = epoint.getAddress(); |
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|
364 |
int port = epoint.getPort(); |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
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|
365 |
checkAddress(iaddr, "bind"); |
2 | 366 |
SecurityManager sec = System.getSecurityManager(); |
367 |
if (sec != null) { |
|
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|
368 |
sec.checkListen(port); |
2 | 369 |
} |
370 |
try { |
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|
371 |
getImpl().bind(port, iaddr); |
2 | 372 |
} catch (SocketException e) { |
373 |
getImpl().close(); |
|
374 |
throw e; |
|
375 |
} |
|
376 |
bound = true; |
|
377 |
} |
|
378 |
||
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|
379 |
void checkAddress (InetAddress addr, String op) { |
8161f879d704
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|
380 |
if (addr == null) { |
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|
381 |
return; |
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|
382 |
} |
8161f879d704
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|
383 |
if (!(addr instanceof Inet4Address || addr instanceof Inet6Address)) { |
8161f879d704
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|
384 |
throw new IllegalArgumentException(op + ": invalid address type"); |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
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|
385 |
} |
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|
386 |
} |
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|
387 |
|
2 | 388 |
/** |
389 |
* Connects the socket to a remote address for this socket. When a |
|
390 |
* socket is connected to a remote address, packets may only be |
|
391 |
* sent to or received from that address. By default a datagram |
|
392 |
* socket is not connected. |
|
393 |
* |
|
394 |
* <p>If the remote destination to which the socket is connected does not |
|
395 |
* exist, or is otherwise unreachable, and if an ICMP destination unreachable |
|
396 |
* packet has been received for that address, then a subsequent call to |
|
397 |
* send or receive may throw a PortUnreachableException. Note, there is no |
|
398 |
* guarantee that the exception will be thrown. |
|
399 |
* |
|
5465
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|
400 |
* <p> If a security manager has been installed then it is invoked to check |
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|
401 |
* access to the remote address. Specifically, if the given {@code address} |
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|
402 |
* is a {@link InetAddress#isMulticastAddress multicast address}, |
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|
403 |
* the security manager's {@link |
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|
404 |
* java.lang.SecurityManager#checkMulticast(InetAddress) |
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|
405 |
* checkMulticast} method is invoked with the given {@code address}. |
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|
406 |
* Otherwise, the security manager's {@link |
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|
407 |
* java.lang.SecurityManager#checkConnect(String,int) checkConnect} |
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|
408 |
* and {@link java.lang.SecurityManager#checkAccept checkAccept} methods |
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|
409 |
* are invoked, with the given {@code address} and {@code port}, to |
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|
410 |
* verify that datagrams are permitted to be sent and received |
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|
411 |
* respectively. |
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|
412 |
* |
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|
413 |
* <p> When a socket is connected, {@link #receive receive} and |
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|
414 |
* {@link #send send} <b>will not perform any security checks</b> |
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|
415 |
* on incoming and outgoing packets, other than matching the packet's |
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|
416 |
* and the socket's address and port. On a send operation, if the |
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|
417 |
* packet's address is set and the packet's address and the socket's |
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|
418 |
* address do not match, an {@code IllegalArgumentException} will be |
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|
419 |
* thrown. A socket connected to a multicast address may only be used |
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|
420 |
* to send packets. |
2 | 421 |
* |
422 |
* @param address the remote address for the socket |
|
423 |
* |
|
424 |
* @param port the remote port for the socket. |
|
425 |
* |
|
5465
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|
426 |
* @throws IllegalArgumentException |
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|
427 |
* if the address is null, or the port is out of range. |
2 | 428 |
* |
5465
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|
429 |
* @throws SecurityException |
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|
430 |
* if a security manager has been installed and it does |
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|
431 |
* not permit access to the given remote address |
2 | 432 |
* |
433 |
* @see #disconnect |
|
434 |
*/ |
|
435 |
public void connect(InetAddress address, int port) { |
|
436 |
try { |
|
437 |
connectInternal(address, port); |
|
438 |
} catch (SocketException se) { |
|
439 |
throw new Error("connect failed", se); |
|
440 |
} |
|
441 |
} |
|
442 |
||
443 |
/** |
|
444 |
* Connects this socket to a remote socket address (IP address + port number). |
|
5465
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|
445 |
* |
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|
446 |
* <p> If given an {@link InetSocketAddress InetSocketAddress}, this method |
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|
447 |
* behaves as if invoking {@link #connect(InetAddress,int) connect(InetAddress,int)} |
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|
448 |
* with the the given socket addresses IP address and port number. |
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|
449 |
* |
2 | 450 |
* @param addr The remote address. |
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|
451 |
* |
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|
452 |
* @throws SocketException |
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|
453 |
* if the connect fails |
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|
454 |
* |
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|
455 |
* @throws IllegalArgumentException |
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|
456 |
* if {@code addr} is {@code null}, or {@code addr} is a SocketAddress |
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|
457 |
* subclass not supported by this socket |
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|
458 |
* |
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|
459 |
* @throws SecurityException |
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|
460 |
* if a security manager has been installed and it does |
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|
461 |
* not permit access to the given remote address |
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|
462 |
* |
2 | 463 |
* @since 1.4 |
464 |
*/ |
|
465 |
public void connect(SocketAddress addr) throws SocketException { |
|
466 |
if (addr == null) |
|
467 |
throw new IllegalArgumentException("Address can't be null"); |
|
468 |
if (!(addr instanceof InetSocketAddress)) |
|
469 |
throw new IllegalArgumentException("Unsupported address type"); |
|
470 |
InetSocketAddress epoint = (InetSocketAddress) addr; |
|
471 |
if (epoint.isUnresolved()) |
|
472 |
throw new SocketException("Unresolved address"); |
|
473 |
connectInternal(epoint.getAddress(), epoint.getPort()); |
|
474 |
} |
|
475 |
||
476 |
/** |
|
477 |
* Disconnects the socket. If the socket is closed or not connected, |
|
478 |
* then this method has no effect. |
|
479 |
* |
|
480 |
* @see #connect |
|
481 |
*/ |
|
482 |
public void disconnect() { |
|
483 |
synchronized (this) { |
|
484 |
if (isClosed()) |
|
485 |
return; |
|
486 |
if (connectState == ST_CONNECTED) { |
|
487 |
impl.disconnect (); |
|
488 |
} |
|
489 |
connectedAddress = null; |
|
490 |
connectedPort = -1; |
|
491 |
connectState = ST_NOT_CONNECTED; |
|
492 |
} |
|
493 |
} |
|
494 |
||
495 |
/** |
|
496 |
* Returns the binding state of the socket. |
|
497 |
* <p> |
|
498 |
* If the socket was bound prior to being {@link #close closed}, |
|
499 |
* then this method will continue to return <code>true</code> |
|
500 |
* after the socket is closed. |
|
501 |
* |
|
502 |
* @return true if the socket successfully bound to an address |
|
503 |
* @since 1.4 |
|
504 |
*/ |
|
505 |
public boolean isBound() { |
|
506 |
return bound; |
|
507 |
} |
|
508 |
||
509 |
/** |
|
510 |
* Returns the connection state of the socket. |
|
511 |
* <p> |
|
512 |
* If the socket was connected prior to being {@link #close closed}, |
|
513 |
* then this method will continue to return <code>true</code> |
|
514 |
* after the socket is closed. |
|
515 |
* |
|
516 |
* @return true if the socket successfully connected to a server |
|
517 |
* @since 1.4 |
|
518 |
*/ |
|
519 |
public boolean isConnected() { |
|
520 |
return connectState != ST_NOT_CONNECTED; |
|
521 |
} |
|
522 |
||
523 |
/** |
|
524 |
* Returns the address to which this socket is connected. Returns |
|
525 |
* <code>null</code> if the socket is not connected. |
|
526 |
* <p> |
|
527 |
* If the socket was connected prior to being {@link #close closed}, |
|
528 |
* then this method will continue to return the connected address |
|
529 |
* after the socket is closed. |
|
530 |
* |
|
531 |
* @return the address to which this socket is connected. |
|
532 |
*/ |
|
533 |
public InetAddress getInetAddress() { |
|
534 |
return connectedAddress; |
|
535 |
} |
|
536 |
||
537 |
/** |
|
538 |
* Returns the port number to which this socket is connected. |
|
539 |
* Returns <code>-1</code> if the socket is not connected. |
|
540 |
* <p> |
|
541 |
* If the socket was connected prior to being {@link #close closed}, |
|
542 |
* then this method will continue to return the connected port number |
|
543 |
* after the socket is closed. |
|
544 |
* |
|
545 |
* @return the port number to which this socket is connected. |
|
546 |
*/ |
|
547 |
public int getPort() { |
|
548 |
return connectedPort; |
|
549 |
} |
|
550 |
||
551 |
/** |
|
552 |
* Returns the address of the endpoint this socket is connected to, or |
|
553 |
* <code>null</code> if it is unconnected. |
|
554 |
* <p> |
|
555 |
* If the socket was connected prior to being {@link #close closed}, |
|
556 |
* then this method will continue to return the connected address |
|
557 |
* after the socket is closed. |
|
558 |
* |
|
559 |
* @return a <code>SocketAddress</code> representing the remote |
|
560 |
* endpoint of this socket, or <code>null</code> if it is |
|
561 |
* not connected yet. |
|
562 |
* @see #getInetAddress() |
|
563 |
* @see #getPort() |
|
564 |
* @see #connect(SocketAddress) |
|
565 |
* @since 1.4 |
|
566 |
*/ |
|
567 |
public SocketAddress getRemoteSocketAddress() { |
|
568 |
if (!isConnected()) |
|
569 |
return null; |
|
570 |
return new InetSocketAddress(getInetAddress(), getPort()); |
|
571 |
} |
|
572 |
||
573 |
/** |
|
574 |
* Returns the address of the endpoint this socket is bound to. |
|
575 |
* |
|
576 |
* @return a <code>SocketAddress</code> representing the local endpoint of this |
|
577 |
* socket, or <code>null</code> if it is closed or not bound yet. |
|
578 |
* @see #getLocalAddress() |
|
579 |
* @see #getLocalPort() |
|
580 |
* @see #bind(SocketAddress) |
|
581 |
* @since 1.4 |
|
582 |
*/ |
|
583 |
||
584 |
public SocketAddress getLocalSocketAddress() { |
|
585 |
if (isClosed()) |
|
586 |
return null; |
|
587 |
if (!isBound()) |
|
588 |
return null; |
|
589 |
return new InetSocketAddress(getLocalAddress(), getLocalPort()); |
|
590 |
} |
|
591 |
||
592 |
/** |
|
593 |
* Sends a datagram packet from this socket. The |
|
594 |
* <code>DatagramPacket</code> includes information indicating the |
|
595 |
* data to be sent, its length, the IP address of the remote host, |
|
596 |
* and the port number on the remote host. |
|
597 |
* |
|
598 |
* <p>If there is a security manager, and the socket is not currently |
|
599 |
* connected to a remote address, this method first performs some |
|
600 |
* security checks. First, if <code>p.getAddress().isMulticastAddress()</code> |
|
601 |
* is true, this method calls the |
|
602 |
* security manager's <code>checkMulticast</code> method |
|
603 |
* with <code>p.getAddress()</code> as its argument. |
|
604 |
* If the evaluation of that expression is false, |
|
605 |
* this method instead calls the security manager's |
|
606 |
* <code>checkConnect</code> method with arguments |
|
607 |
* <code>p.getAddress().getHostAddress()</code> and |
|
608 |
* <code>p.getPort()</code>. Each call to a security manager method |
|
609 |
* could result in a SecurityException if the operation is not allowed. |
|
610 |
* |
|
611 |
* @param p the <code>DatagramPacket</code> to be sent. |
|
612 |
* |
|
613 |
* @exception IOException if an I/O error occurs. |
|
614 |
* @exception SecurityException if a security manager exists and its |
|
615 |
* <code>checkMulticast</code> or <code>checkConnect</code> |
|
616 |
* method doesn't allow the send. |
|
617 |
* @exception PortUnreachableException may be thrown if the socket is connected |
|
618 |
* to a currently unreachable destination. Note, there is no |
|
619 |
* guarantee that the exception will be thrown. |
|
620 |
* @exception java.nio.channels.IllegalBlockingModeException |
|
621 |
* if this socket has an associated channel, |
|
622 |
* and the channel is in non-blocking mode. |
|
623 |
* @exception IllegalArgumentException if the socket is connected, |
|
624 |
* and connected address and packet address differ. |
|
625 |
* |
|
626 |
* @see java.net.DatagramPacket |
|
627 |
* @see SecurityManager#checkMulticast(InetAddress) |
|
628 |
* @see SecurityManager#checkConnect |
|
629 |
* @revised 1.4 |
|
630 |
* @spec JSR-51 |
|
631 |
*/ |
|
632 |
public void send(DatagramPacket p) throws IOException { |
|
633 |
InetAddress packetAddress = null; |
|
634 |
synchronized (p) { |
|
635 |
if (isClosed()) |
|
636 |
throw new SocketException("Socket is closed"); |
|
5180
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changeset
|
637 |
checkAddress (p.getAddress(), "send"); |
2 | 638 |
if (connectState == ST_NOT_CONNECTED) { |
639 |
// check the address is ok wiht the security manager on every send. |
|
640 |
SecurityManager security = System.getSecurityManager(); |
|
641 |
||
642 |
// The reason you want to synchronize on datagram packet |
|
643 |
// is because you dont want an applet to change the address |
|
644 |
// while you are trying to send the packet for example |
|
645 |
// after the security check but before the send. |
|
646 |
if (security != null) { |
|
647 |
if (p.getAddress().isMulticastAddress()) { |
|
648 |
security.checkMulticast(p.getAddress()); |
|
649 |
} else { |
|
650 |
security.checkConnect(p.getAddress().getHostAddress(), |
|
651 |
p.getPort()); |
|
652 |
} |
|
653 |
} |
|
654 |
} else { |
|
655 |
// we're connected |
|
656 |
packetAddress = p.getAddress(); |
|
657 |
if (packetAddress == null) { |
|
658 |
p.setAddress(connectedAddress); |
|
659 |
p.setPort(connectedPort); |
|
660 |
} else if ((!packetAddress.equals(connectedAddress)) || |
|
661 |
p.getPort() != connectedPort) { |
|
662 |
throw new IllegalArgumentException("connected address " + |
|
663 |
"and packet address" + |
|
664 |
" differ"); |
|
665 |
} |
|
666 |
} |
|
667 |
// Check whether the socket is bound |
|
668 |
if (!isBound()) |
|
669 |
bind(new InetSocketAddress(0)); |
|
670 |
// call the method to send |
|
671 |
getImpl().send(p); |
|
672 |
} |
|
673 |
} |
|
674 |
||
675 |
/** |
|
676 |
* Receives a datagram packet from this socket. When this method |
|
677 |
* returns, the <code>DatagramPacket</code>'s buffer is filled with |
|
678 |
* the data received. The datagram packet also contains the sender's |
|
679 |
* IP address, and the port number on the sender's machine. |
|
680 |
* <p> |
|
681 |
* This method blocks until a datagram is received. The |
|
682 |
* <code>length</code> field of the datagram packet object contains |
|
683 |
* the length of the received message. If the message is longer than |
|
684 |
* the packet's length, the message is truncated. |
|
685 |
* <p> |
|
686 |
* If there is a security manager, a packet cannot be received if the |
|
687 |
* security manager's <code>checkAccept</code> method |
|
688 |
* does not allow it. |
|
689 |
* |
|
690 |
* @param p the <code>DatagramPacket</code> into which to place |
|
691 |
* the incoming data. |
|
692 |
* @exception IOException if an I/O error occurs. |
|
693 |
* @exception SocketTimeoutException if setSoTimeout was previously called |
|
694 |
* and the timeout has expired. |
|
695 |
* @exception PortUnreachableException may be thrown if the socket is connected |
|
696 |
* to a currently unreachable destination. Note, there is no guarantee that the |
|
697 |
* exception will be thrown. |
|
698 |
* @exception java.nio.channels.IllegalBlockingModeException |
|
699 |
* if this socket has an associated channel, |
|
700 |
* and the channel is in non-blocking mode. |
|
701 |
* @see java.net.DatagramPacket |
|
702 |
* @see java.net.DatagramSocket |
|
703 |
* @revised 1.4 |
|
704 |
* @spec JSR-51 |
|
705 |
*/ |
|
706 |
public synchronized void receive(DatagramPacket p) throws IOException { |
|
707 |
synchronized (p) { |
|
708 |
if (!isBound()) |
|
709 |
bind(new InetSocketAddress(0)); |
|
710 |
if (connectState == ST_NOT_CONNECTED) { |
|
711 |
// check the address is ok with the security manager before every recv. |
|
712 |
SecurityManager security = System.getSecurityManager(); |
|
713 |
if (security != null) { |
|
714 |
while(true) { |
|
715 |
String peekAd = null; |
|
716 |
int peekPort = 0; |
|
717 |
// peek at the packet to see who it is from. |
|
718 |
if (!oldImpl) { |
|
719 |
// We can use the new peekData() API |
|
720 |
DatagramPacket peekPacket = new DatagramPacket(new byte[1], 1); |
|
721 |
peekPort = getImpl().peekData(peekPacket); |
|
722 |
peekAd = peekPacket.getAddress().getHostAddress(); |
|
723 |
} else { |
|
724 |
InetAddress adr = new InetAddress(); |
|
725 |
peekPort = getImpl().peek(adr); |
|
726 |
peekAd = adr.getHostAddress(); |
|
727 |
} |
|
728 |
try { |
|
729 |
security.checkAccept(peekAd, peekPort); |
|
730 |
// security check succeeded - so now break |
|
731 |
// and recv the packet. |
|
732 |
break; |
|
733 |
} catch (SecurityException se) { |
|
734 |
// Throw away the offending packet by consuming |
|
735 |
// it in a tmp buffer. |
|
736 |
DatagramPacket tmp = new DatagramPacket(new byte[1], 1); |
|
737 |
getImpl().receive(tmp); |
|
738 |
||
739 |
// silently discard the offending packet |
|
740 |
// and continue: unknown/malicious |
|
741 |
// entities on nets should not make |
|
742 |
// runtime throw security exception and |
|
743 |
// disrupt the applet by sending random |
|
744 |
// datagram packets. |
|
745 |
continue; |
|
746 |
} |
|
747 |
} // end of while |
|
748 |
} |
|
749 |
} |
|
750 |
if (connectState == ST_CONNECTED_NO_IMPL) { |
|
751 |
// We have to do the filtering the old fashioned way since |
|
752 |
// the native impl doesn't support connect or the connect |
|
753 |
// via the impl failed. |
|
754 |
boolean stop = false; |
|
755 |
while (!stop) { |
|
12047
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
756 |
InetAddress peekAddress = null; |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
757 |
int peekPort = -1; |
2 | 758 |
// peek at the packet to see who it is from. |
12047
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
759 |
if (!oldImpl) { |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
760 |
// We can use the new peekData() API |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
761 |
DatagramPacket peekPacket = new DatagramPacket(new byte[1], 1); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
762 |
peekPort = getImpl().peekData(peekPacket); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
763 |
peekAddress = peekPacket.getAddress(); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
764 |
} else { |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
765 |
// this api only works for IPv4 |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
766 |
peekAddress = new InetAddress(); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
767 |
peekPort = getImpl().peek(peekAddress); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
768 |
} |
2 | 769 |
if ((!connectedAddress.equals(peekAddress)) || |
770 |
(connectedPort != peekPort)) { |
|
771 |
// throw the packet away and silently continue |
|
772 |
DatagramPacket tmp = new DatagramPacket(new byte[1], 1); |
|
773 |
getImpl().receive(tmp); |
|
774 |
} else { |
|
775 |
stop = true; |
|
776 |
} |
|
777 |
} |
|
778 |
} |
|
779 |
// If the security check succeeds, or the datagram is |
|
780 |
// connected then receive the packet |
|
781 |
getImpl().receive(p); |
|
782 |
} |
|
783 |
} |
|
784 |
||
785 |
/** |
|
786 |
* Gets the local address to which the socket is bound. |
|
787 |
* |
|
788 |
* <p>If there is a security manager, its |
|
789 |
* <code>checkConnect</code> method is first called |
|
790 |
* with the host address and <code>-1</code> |
|
791 |
* as its arguments to see if the operation is allowed. |
|
792 |
* |
|
793 |
* @see SecurityManager#checkConnect |
|
794 |
* @return the local address to which the socket is bound, |
|
795 |
* <code>null</code> if the socket is closed, or |
|
796 |
* an <code>InetAddress</code> representing |
|
797 |
* {@link InetAddress#isAnyLocalAddress wildcard} |
|
798 |
* address if either the socket is not bound, or |
|
799 |
* the security manager <code>checkConnect</code> |
|
800 |
* method does not allow the operation |
|
801 |
* @since 1.1 |
|
802 |
*/ |
|
803 |
public InetAddress getLocalAddress() { |
|
804 |
if (isClosed()) |
|
805 |
return null; |
|
806 |
InetAddress in = null; |
|
807 |
try { |
|
808 |
in = (InetAddress) getImpl().getOption(SocketOptions.SO_BINDADDR); |
|
809 |
if (in.isAnyLocalAddress()) { |
|
810 |
in = InetAddress.anyLocalAddress(); |
|
811 |
} |
|
812 |
SecurityManager s = System.getSecurityManager(); |
|
813 |
if (s != null) { |
|
814 |
s.checkConnect(in.getHostAddress(), -1); |
|
815 |
} |
|
816 |
} catch (Exception e) { |
|
817 |
in = InetAddress.anyLocalAddress(); // "0.0.0.0" |
|
818 |
} |
|
819 |
return in; |
|
820 |
} |
|
821 |
||
822 |
/** |
|
823 |
* Returns the port number on the local host to which this socket |
|
824 |
* is bound. |
|
825 |
* |
|
826 |
* @return the port number on the local host to which this socket is bound, |
|
827 |
<code>-1</code> if the socket is closed, or |
|
828 |
<code>0</code> if it is not bound yet. |
|
829 |
*/ |
|
830 |
public int getLocalPort() { |
|
831 |
if (isClosed()) |
|
832 |
return -1; |
|
833 |
try { |
|
834 |
return getImpl().getLocalPort(); |
|
835 |
} catch (Exception e) { |
|
836 |
return 0; |
|
837 |
} |
|
838 |
} |
|
839 |
||
840 |
/** Enable/disable SO_TIMEOUT with the specified timeout, in |
|
841 |
* milliseconds. With this option set to a non-zero timeout, |
|
842 |
* a call to receive() for this DatagramSocket |
|
843 |
* will block for only this amount of time. If the timeout expires, |
|
844 |
* a <B>java.net.SocketTimeoutException</B> is raised, though the |
|
845 |
* DatagramSocket is still valid. The option <B>must</B> be enabled |
|
846 |
* prior to entering the blocking operation to have effect. The |
|
847 |
* timeout must be > 0. |
|
848 |
* A timeout of zero is interpreted as an infinite timeout. |
|
849 |
* |
|
850 |
* @param timeout the specified timeout in milliseconds. |
|
851 |
* @throws SocketException if there is an error in the underlying protocol, such as an UDP error. |
|
852 |
* @since JDK1.1 |
|
853 |
* @see #getSoTimeout() |
|
854 |
*/ |
|
855 |
public synchronized void setSoTimeout(int timeout) throws SocketException { |
|
856 |
if (isClosed()) |
|
857 |
throw new SocketException("Socket is closed"); |
|
858 |
getImpl().setOption(SocketOptions.SO_TIMEOUT, new Integer(timeout)); |
|
859 |
} |
|
860 |
||
861 |
/** |
|
862 |
* Retrieve setting for SO_TIMEOUT. 0 returns implies that the |
|
863 |
* option is disabled (i.e., timeout of infinity). |
|
864 |
* |
|
865 |
* @return the setting for SO_TIMEOUT |
|
866 |
* @throws SocketException if there is an error in the underlying protocol, such as an UDP error. |
|
867 |
* @since JDK1.1 |
|
868 |
* @see #setSoTimeout(int) |
|
869 |
*/ |
|
870 |
public synchronized int getSoTimeout() throws SocketException { |
|
871 |
if (isClosed()) |
|
872 |
throw new SocketException("Socket is closed"); |
|
873 |
if (getImpl() == null) |
|
874 |
return 0; |
|
875 |
Object o = getImpl().getOption(SocketOptions.SO_TIMEOUT); |
|
876 |
/* extra type safety */ |
|
877 |
if (o instanceof Integer) { |
|
878 |
return ((Integer) o).intValue(); |
|
879 |
} else { |
|
880 |
return 0; |
|
881 |
} |
|
882 |
} |
|
883 |
||
884 |
/** |
|
885 |
* Sets the SO_SNDBUF option to the specified value for this |
|
886 |
* <tt>DatagramSocket</tt>. The SO_SNDBUF option is used by the |
|
887 |
* network implementation as a hint to size the underlying |
|
888 |
* network I/O buffers. The SO_SNDBUF setting may also be used |
|
889 |
* by the network implementation to determine the maximum size |
|
890 |
* of the packet that can be sent on this socket. |
|
891 |
* <p> |
|
892 |
* As SO_SNDBUF is a hint, applications that want to verify |
|
893 |
* what size the buffer is should call {@link #getSendBufferSize()}. |
|
894 |
* <p> |
|
895 |
* Increasing the buffer size may allow multiple outgoing packets |
|
896 |
* to be queued by the network implementation when the send rate |
|
897 |
* is high. |
|
898 |
* <p> |
|
899 |
* Note: If {@link #send(DatagramPacket)} is used to send a |
|
900 |
* <code>DatagramPacket</code> that is larger than the setting |
|
901 |
* of SO_SNDBUF then it is implementation specific if the |
|
902 |
* packet is sent or discarded. |
|
903 |
* |
|
904 |
* @param size the size to which to set the send buffer |
|
905 |
* size. This value must be greater than 0. |
|
906 |
* |
|
907 |
* @exception SocketException if there is an error |
|
908 |
* in the underlying protocol, such as an UDP error. |
|
909 |
* @exception IllegalArgumentException if the value is 0 or is |
|
910 |
* negative. |
|
911 |
* @see #getSendBufferSize() |
|
912 |
*/ |
|
913 |
public synchronized void setSendBufferSize(int size) |
|
914 |
throws SocketException{ |
|
915 |
if (!(size > 0)) { |
|
916 |
throw new IllegalArgumentException("negative send size"); |
|
917 |
} |
|
918 |
if (isClosed()) |
|
919 |
throw new SocketException("Socket is closed"); |
|
920 |
getImpl().setOption(SocketOptions.SO_SNDBUF, new Integer(size)); |
|
921 |
} |
|
922 |
||
923 |
/** |
|
924 |
* Get value of the SO_SNDBUF option for this <tt>DatagramSocket</tt>, that is the |
|
925 |
* buffer size used by the platform for output on this <tt>DatagramSocket</tt>. |
|
926 |
* |
|
927 |
* @return the value of the SO_SNDBUF option for this <tt>DatagramSocket</tt> |
|
928 |
* @exception SocketException if there is an error in |
|
929 |
* the underlying protocol, such as an UDP error. |
|
930 |
* @see #setSendBufferSize |
|
931 |
*/ |
|
932 |
public synchronized int getSendBufferSize() throws SocketException { |
|
933 |
if (isClosed()) |
|
934 |
throw new SocketException("Socket is closed"); |
|
935 |
int result = 0; |
|
936 |
Object o = getImpl().getOption(SocketOptions.SO_SNDBUF); |
|
937 |
if (o instanceof Integer) { |
|
938 |
result = ((Integer)o).intValue(); |
|
939 |
} |
|
940 |
return result; |
|
941 |
} |
|
942 |
||
943 |
/** |
|
944 |
* Sets the SO_RCVBUF option to the specified value for this |
|
945 |
* <tt>DatagramSocket</tt>. The SO_RCVBUF option is used by the |
|
946 |
* the network implementation as a hint to size the underlying |
|
947 |
* network I/O buffers. The SO_RCVBUF setting may also be used |
|
948 |
* by the network implementation to determine the maximum size |
|
949 |
* of the packet that can be received on this socket. |
|
950 |
* <p> |
|
951 |
* Because SO_RCVBUF is a hint, applications that want to |
|
952 |
* verify what size the buffers were set to should call |
|
953 |
* {@link #getReceiveBufferSize()}. |
|
954 |
* <p> |
|
955 |
* Increasing SO_RCVBUF may allow the network implementation |
|
956 |
* to buffer multiple packets when packets arrive faster than |
|
957 |
* are being received using {@link #receive(DatagramPacket)}. |
|
958 |
* <p> |
|
959 |
* Note: It is implementation specific if a packet larger |
|
960 |
* than SO_RCVBUF can be received. |
|
961 |
* |
|
962 |
* @param size the size to which to set the receive buffer |
|
963 |
* size. This value must be greater than 0. |
|
964 |
* |
|
965 |
* @exception SocketException if there is an error in |
|
966 |
* the underlying protocol, such as an UDP error. |
|
967 |
* @exception IllegalArgumentException if the value is 0 or is |
|
968 |
* negative. |
|
969 |
* @see #getReceiveBufferSize() |
|
970 |
*/ |
|
971 |
public synchronized void setReceiveBufferSize(int size) |
|
972 |
throws SocketException{ |
|
973 |
if (size <= 0) { |
|
974 |
throw new IllegalArgumentException("invalid receive size"); |
|
975 |
} |
|
976 |
if (isClosed()) |
|
977 |
throw new SocketException("Socket is closed"); |
|
978 |
getImpl().setOption(SocketOptions.SO_RCVBUF, new Integer(size)); |
|
979 |
} |
|
980 |
||
981 |
/** |
|
982 |
* Get value of the SO_RCVBUF option for this <tt>DatagramSocket</tt>, that is the |
|
983 |
* buffer size used by the platform for input on this <tt>DatagramSocket</tt>. |
|
984 |
* |
|
985 |
* @return the value of the SO_RCVBUF option for this <tt>DatagramSocket</tt> |
|
986 |
* @exception SocketException if there is an error in the underlying protocol, such as an UDP error. |
|
987 |
* @see #setReceiveBufferSize(int) |
|
988 |
*/ |
|
989 |
public synchronized int getReceiveBufferSize() |
|
990 |
throws SocketException{ |
|
991 |
if (isClosed()) |
|
992 |
throw new SocketException("Socket is closed"); |
|
993 |
int result = 0; |
|
994 |
Object o = getImpl().getOption(SocketOptions.SO_RCVBUF); |
|
995 |
if (o instanceof Integer) { |
|
996 |
result = ((Integer)o).intValue(); |
|
997 |
} |
|
998 |
return result; |
|
999 |
} |
|
1000 |
||
1001 |
/** |
|
1002 |
* Enable/disable the SO_REUSEADDR socket option. |
|
1003 |
* <p> |
|
1004 |
* For UDP sockets it may be necessary to bind more than one |
|
1005 |
* socket to the same socket address. This is typically for the |
|
1006 |
* purpose of receiving multicast packets |
|
1007 |
* (See {@link java.net.MulticastSocket}). The |
|
1008 |
* <tt>SO_REUSEADDR</tt> socket option allows multiple |
|
1009 |
* sockets to be bound to the same socket address if the |
|
1010 |
* <tt>SO_REUSEADDR</tt> socket option is enabled prior |
|
1011 |
* to binding the socket using {@link #bind(SocketAddress)}. |
|
1012 |
* <p> |
|
1013 |
* Note: This functionality is not supported by all existing platforms, |
|
1014 |
* so it is implementation specific whether this option will be ignored |
|
1015 |
* or not. However, if it is not supported then |
|
1016 |
* {@link #getReuseAddress()} will always return <code>false</code>. |
|
1017 |
* <p> |
|
1018 |
* When a <tt>DatagramSocket</tt> is created the initial setting |
|
1019 |
* of <tt>SO_REUSEADDR</tt> is disabled. |
|
1020 |
* <p> |
|
1021 |
* The behaviour when <tt>SO_REUSEADDR</tt> is enabled or |
|
1022 |
* disabled after a socket is bound (See {@link #isBound()}) |
|
1023 |
* is not defined. |
|
1024 |
* |
|
1025 |
* @param on whether to enable or disable the |
|
1026 |
* @exception SocketException if an error occurs enabling or |
|
1027 |
* disabling the <tt>SO_RESUEADDR</tt> socket option, |
|
1028 |
* or the socket is closed. |
|
1029 |
* @since 1.4 |
|
1030 |
* @see #getReuseAddress() |
|
1031 |
* @see #bind(SocketAddress) |
|
1032 |
* @see #isBound() |
|
1033 |
* @see #isClosed() |
|
1034 |
*/ |
|
1035 |
public synchronized void setReuseAddress(boolean on) throws SocketException { |
|
1036 |
if (isClosed()) |
|
1037 |
throw new SocketException("Socket is closed"); |
|
1038 |
// Integer instead of Boolean for compatibility with older DatagramSocketImpl |
|
1039 |
if (oldImpl) |
|
1040 |
getImpl().setOption(SocketOptions.SO_REUSEADDR, new Integer(on?-1:0)); |
|
1041 |
else |
|
1042 |
getImpl().setOption(SocketOptions.SO_REUSEADDR, Boolean.valueOf(on)); |
|
1043 |
} |
|
1044 |
||
1045 |
/** |
|
1046 |
* Tests if SO_REUSEADDR is enabled. |
|
1047 |
* |
|
1048 |
* @return a <code>boolean</code> indicating whether or not SO_REUSEADDR is enabled. |
|
1049 |
* @exception SocketException if there is an error |
|
1050 |
* in the underlying protocol, such as an UDP error. |
|
1051 |
* @since 1.4 |
|
1052 |
* @see #setReuseAddress(boolean) |
|
1053 |
*/ |
|
1054 |
public synchronized boolean getReuseAddress() throws SocketException { |
|
1055 |
if (isClosed()) |
|
1056 |
throw new SocketException("Socket is closed"); |
|
1057 |
Object o = getImpl().getOption(SocketOptions.SO_REUSEADDR); |
|
1058 |
return ((Boolean)o).booleanValue(); |
|
1059 |
} |
|
1060 |
||
1061 |
/** |
|
1062 |
* Enable/disable SO_BROADCAST. |
|
1817
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1063 |
* |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1064 |
* <p> Some operating systems may require that the Java virtual machine be |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1065 |
* started with implementation specific privileges to enable this option or |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1066 |
* send broadcast datagrams. |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1067 |
* |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1068 |
* @param on |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1069 |
* whether or not to have broadcast turned on. |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1070 |
* |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1071 |
* @throws SocketException |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1072 |
* if there is an error in the underlying protocol, such as an UDP |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1073 |
* error. |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1074 |
* |
2 | 1075 |
* @since 1.4 |
1076 |
* @see #getBroadcast() |
|
1077 |
*/ |
|
1078 |
public synchronized void setBroadcast(boolean on) throws SocketException { |
|
1079 |
if (isClosed()) |
|
1080 |
throw new SocketException("Socket is closed"); |
|
1081 |
getImpl().setOption(SocketOptions.SO_BROADCAST, Boolean.valueOf(on)); |
|
1082 |
} |
|
1083 |
||
1084 |
/** |
|
1085 |
* Tests if SO_BROADCAST is enabled. |
|
1086 |
* @return a <code>boolean</code> indicating whether or not SO_BROADCAST is enabled. |
|
1087 |
* @exception SocketException if there is an error |
|
1088 |
* in the underlying protocol, such as an UDP error. |
|
1089 |
* @since 1.4 |
|
1090 |
* @see #setBroadcast(boolean) |
|
1091 |
*/ |
|
1092 |
public synchronized boolean getBroadcast() throws SocketException { |
|
1093 |
if (isClosed()) |
|
1094 |
throw new SocketException("Socket is closed"); |
|
1095 |
return ((Boolean)(getImpl().getOption(SocketOptions.SO_BROADCAST))).booleanValue(); |
|
1096 |
} |
|
1097 |
||
1098 |
/** |
|
1099 |
* Sets traffic class or type-of-service octet in the IP |
|
1100 |
* datagram header for datagrams sent from this DatagramSocket. |
|
1101 |
* As the underlying network implementation may ignore this |
|
1102 |
* value applications should consider it a hint. |
|
1103 |
* |
|
1104 |
* <P> The tc <B>must</B> be in the range <code> 0 <= tc <= |
|
1105 |
* 255</code> or an IllegalArgumentException will be thrown. |
|
1106 |
* <p>Notes: |
|
1107 |
* <p>For Internet Protocol v4 the value consists of an |
|
1108 |
* <code>integer</code>, the least significant 8 bits of which |
|
1109 |
* represent the value of the TOS octet in IP packets sent by |
|
1110 |
* the socket. |
|
1111 |
* RFC 1349 defines the TOS values as follows: |
|
1112 |
* <p> |
|
1113 |
* <UL> |
|
1114 |
* <LI><CODE>IPTOS_LOWCOST (0x02)</CODE></LI> |
|
1115 |
* <LI><CODE>IPTOS_RELIABILITY (0x04)</CODE></LI> |
|
1116 |
* <LI><CODE>IPTOS_THROUGHPUT (0x08)</CODE></LI> |
|
1117 |
* <LI><CODE>IPTOS_LOWDELAY (0x10)</CODE></LI> |
|
1118 |
* </UL> |
|
1119 |
* The last low order bit is always ignored as this |
|
1120 |
* corresponds to the MBZ (must be zero) bit. |
|
1121 |
* <p> |
|
1122 |
* Setting bits in the precedence field may result in a |
|
1123 |
* SocketException indicating that the operation is not |
|
1124 |
* permitted. |
|
1125 |
* <p> |
|
1126 |
* for Internet Protocol v6 <code>tc</code> is the value that |
|
1127 |
* would be placed into the sin6_flowinfo field of the IP header. |
|
1128 |
* |
|
1129 |
* @param tc an <code>int</code> value for the bitset. |
|
1130 |
* @throws SocketException if there is an error setting the |
|
1131 |
* traffic class or type-of-service |
|
1132 |
* @since 1.4 |
|
1133 |
* @see #getTrafficClass |
|
1134 |
*/ |
|
1135 |
public synchronized void setTrafficClass(int tc) throws SocketException { |
|
1136 |
if (tc < 0 || tc > 255) |
|
1137 |
throw new IllegalArgumentException("tc is not in range 0 -- 255"); |
|
1138 |
||
1139 |
if (isClosed()) |
|
1140 |
throw new SocketException("Socket is closed"); |
|
1141 |
getImpl().setOption(SocketOptions.IP_TOS, new Integer(tc)); |
|
1142 |
} |
|
1143 |
||
1144 |
/** |
|
1145 |
* Gets traffic class or type-of-service in the IP datagram |
|
1146 |
* header for packets sent from this DatagramSocket. |
|
1147 |
* <p> |
|
1148 |
* As the underlying network implementation may ignore the |
|
1149 |
* traffic class or type-of-service set using {@link #setTrafficClass(int)} |
|
1150 |
* this method may return a different value than was previously |
|
1151 |
* set using the {@link #setTrafficClass(int)} method on this |
|
1152 |
* DatagramSocket. |
|
1153 |
* |
|
1154 |
* @return the traffic class or type-of-service already set |
|
1155 |
* @throws SocketException if there is an error obtaining the |
|
1156 |
* traffic class or type-of-service value. |
|
1157 |
* @since 1.4 |
|
1158 |
* @see #setTrafficClass(int) |
|
1159 |
*/ |
|
1160 |
public synchronized int getTrafficClass() throws SocketException { |
|
1161 |
if (isClosed()) |
|
1162 |
throw new SocketException("Socket is closed"); |
|
1163 |
return ((Integer)(getImpl().getOption(SocketOptions.IP_TOS))).intValue(); |
|
1164 |
} |
|
1165 |
||
1166 |
/** |
|
1167 |
* Closes this datagram socket. |
|
1168 |
* <p> |
|
1169 |
* Any thread currently blocked in {@link #receive} upon this socket |
|
1170 |
* will throw a {@link SocketException}. |
|
1171 |
* |
|
1172 |
* <p> If this socket has an associated channel then the channel is closed |
|
1173 |
* as well. |
|
1174 |
* |
|
1175 |
* @revised 1.4 |
|
1176 |
* @spec JSR-51 |
|
1177 |
*/ |
|
1178 |
public void close() { |
|
1179 |
synchronized(closeLock) { |
|
1180 |
if (isClosed()) |
|
1181 |
return; |
|
1182 |
impl.close(); |
|
1183 |
closed = true; |
|
1184 |
} |
|
1185 |
} |
|
1186 |
||
1187 |
/** |
|
1188 |
* Returns whether the socket is closed or not. |
|
1189 |
* |
|
1190 |
* @return true if the socket has been closed |
|
1191 |
* @since 1.4 |
|
1192 |
*/ |
|
1193 |
public boolean isClosed() { |
|
1194 |
synchronized(closeLock) { |
|
1195 |
return closed; |
|
1196 |
} |
|
1197 |
} |
|
1198 |
||
1199 |
/** |
|
1200 |
* Returns the unique {@link java.nio.channels.DatagramChannel} object |
|
1201 |
* associated with this datagram socket, if any. |
|
1202 |
* |
|
1203 |
* <p> A datagram socket will have a channel if, and only if, the channel |
|
1204 |
* itself was created via the {@link java.nio.channels.DatagramChannel#open |
|
1205 |
* DatagramChannel.open} method. |
|
1206 |
* |
|
1207 |
* @return the datagram channel associated with this datagram socket, |
|
1208 |
* or <tt>null</tt> if this socket was not created for a channel |
|
1209 |
* |
|
1210 |
* @since 1.4 |
|
1211 |
* @spec JSR-51 |
|
1212 |
*/ |
|
1213 |
public DatagramChannel getChannel() { |
|
1214 |
return null; |
|
1215 |
} |
|
1216 |
||
1217 |
/** |
|
1218 |
* User defined factory for all datagram sockets. |
|
1219 |
*/ |
|
1220 |
static DatagramSocketImplFactory factory; |
|
1221 |
||
1222 |
/** |
|
1223 |
* Sets the datagram socket implementation factory for the |
|
1224 |
* application. The factory can be specified only once. |
|
1225 |
* <p> |
|
1226 |
* When an application creates a new datagram socket, the socket |
|
1227 |
* implementation factory's <code>createDatagramSocketImpl</code> method is |
|
1228 |
* called to create the actual datagram socket implementation. |
|
1229 |
* <p> |
|
1230 |
* Passing <code>null</code> to the method is a no-op unless the factory |
|
1231 |
* was already set. |
|
1232 |
* |
|
1233 |
* <p>If there is a security manager, this method first calls |
|
1234 |
* the security manager's <code>checkSetFactory</code> method |
|
1235 |
* to ensure the operation is allowed. |
|
1236 |
* This could result in a SecurityException. |
|
1237 |
* |
|
1238 |
* @param fac the desired factory. |
|
1239 |
* @exception IOException if an I/O error occurs when setting the |
|
1240 |
* datagram socket factory. |
|
1241 |
* @exception SocketException if the factory is already defined. |
|
1242 |
* @exception SecurityException if a security manager exists and its |
|
1243 |
* <code>checkSetFactory</code> method doesn't allow the |
|
1244 |
operation. |
|
1245 |
* @see |
|
1246 |
java.net.DatagramSocketImplFactory#createDatagramSocketImpl() |
|
1247 |
* @see SecurityManager#checkSetFactory |
|
1248 |
* @since 1.3 |
|
1249 |
*/ |
|
1250 |
public static synchronized void |
|
1251 |
setDatagramSocketImplFactory(DatagramSocketImplFactory fac) |
|
1252 |
throws IOException |
|
1253 |
{ |
|
1254 |
if (factory != null) { |
|
1255 |
throw new SocketException("factory already defined"); |
|
1256 |
} |
|
1257 |
SecurityManager security = System.getSecurityManager(); |
|
1258 |
if (security != null) { |
|
1259 |
security.checkSetFactory(); |
|
1260 |
} |
|
1261 |
factory = fac; |
|
1262 |
} |
|
1263 |
} |