/*
* Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.net;
import java.io.IOException;
import java.io.FileDescriptor;
/**
* This class defines the plain DatagramSocketImpl that is used for all
* Windows versions lower than Vista. It adds support for IPv6 on
* these platforms where available.
*
* For backward compatibility windows platforms that do not have IPv6
* support also use this implementation, and fd1 gets set to null
* during socket creation.
*
* @author Chris Hegarty
* @author Jeroen Frijters
*/
class TwoStacksPlainDatagramSocketImpl extends AbstractPlainDatagramSocketImpl
{
/* Used for IPv6 on Windows only */
FileDescriptor fd1;
/*
* Needed for ipv6 on windows because we need to know
* if the socket was bound to ::0 or 0.0.0.0, when a caller
* asks for it. In this case, both sockets are used, but we
* don't know whether the caller requested ::0 or 0.0.0.0
* and need to remember it here.
*/
private InetAddress anyLocalBoundAddr=null;
cli.System.Net.Sockets.Socket fduse=null; /* saved between peek() and receive() calls */
/* saved between successive calls to receive, if data is detected
* on both sockets at same time. To ensure that one socket is not
* starved, they rotate using this field
*/
cli.System.Net.Sockets.Socket lastfd=null;
protected synchronized void create() throws SocketException {
fd1 = new FileDescriptor();
super.create();
}
protected synchronized void bind(int lport, InetAddress laddr)
throws SocketException {
super.bind(lport, laddr);
if (laddr.isAnyLocalAddress()) {
anyLocalBoundAddr = laddr;
}
}
protected synchronized void receive(DatagramPacket p)
throws IOException {
try {
receive0(p);
} finally {
fduse = null;
}
}
public Object getOption(int optID) throws SocketException {
if (isClosed()) {
throw new SocketException("Socket Closed");
}
if (optID == SO_BINDADDR) {
if (fd != null && fd1 != null) {
return anyLocalBoundAddr;
}
return socketGetOption(optID);
} else
return super.getOption(optID);
}
protected boolean isClosed() {
return (fd == null && fd1 == null) ? true : false;
}
protected void close() {
if (fd != null || fd1 != null) {
datagramSocketClose();
fd = null;
fd1 = null;
}
}
/* Native methods */
protected synchronized void bind0(int lport, InetAddress laddr) throws SocketException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.bind0(env, this, lport, laddr);
env.ThrowPendingException();
}
protected void send(DatagramPacket packet) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.send(env, this, packet);
env.ThrowPendingException();
}
protected synchronized int peek(InetAddress addressObj) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
int ret = TwoStacksPlainDatagramSocketImpl_c.peek(env, this, addressObj);
env.ThrowPendingException();
return ret;
}
protected synchronized int peekData(DatagramPacket p) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
int ret = TwoStacksPlainDatagramSocketImpl_c.peekData(env, this, p);
env.ThrowPendingException();
return ret;
}
protected synchronized void receive0(DatagramPacket packet) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.receive0(env, this, packet);
env.ThrowPendingException();
}
protected void setTimeToLive(int ttl) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.setTimeToLive(env, this, ttl);
env.ThrowPendingException();
}
protected int getTimeToLive() throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
int ret = TwoStacksPlainDatagramSocketImpl_c.getTimeToLive(env, this);
env.ThrowPendingException();
return ret;
}
protected void setTTL(byte ttl) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.setTTL(env, this, ttl);
env.ThrowPendingException();
}
protected byte getTTL() throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
byte ret = TwoStacksPlainDatagramSocketImpl_c.getTTL(env, this);
env.ThrowPendingException();
return ret;
}
protected void join(InetAddress inetaddr, NetworkInterface netIf) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.join(env, this, inetaddr, netIf);
env.ThrowPendingException();
}
protected void leave(InetAddress inetaddr, NetworkInterface netIf) throws IOException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.leave(env, this, inetaddr, netIf);
env.ThrowPendingException();
}
protected void datagramSocketCreate() throws SocketException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.datagramSocketCreate(env, this);
env.ThrowPendingException();
}
protected void datagramSocketClose() {
TwoStacksPlainDatagramSocketImpl_c.datagramSocketClose(this);
}
protected void socketSetOption(int opt, Object val) throws SocketException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.socketSetOption(env, this, opt, val);
env.ThrowPendingException();
}
protected Object socketGetOption(int opt) throws SocketException {
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
Object ret = TwoStacksPlainDatagramSocketImpl_c.socketGetOption(env, this, opt);
env.ThrowPendingException();
return ret;
}
protected void connect0(InetAddress address, int port) throws SocketException {
if (runningOnMono) {
// MONOBUG Mono doesn't allow Socket.Connect(IPAddress.Any, 0) to disconnect a datagram socket,
// so we throw a SocketException, this will cause DatagramSocket to emulate connectedness
throw new SocketException("connected datagram sockets not supported on Mono");
}
ikvm.internal.JNI.JNIEnv env = new ikvm.internal.JNI.JNIEnv();
TwoStacksPlainDatagramSocketImpl_c.connect0(env, this, address, port);
env.ThrowPendingException();
}
protected void disconnect0(int family) {
TwoStacksPlainDatagramSocketImpl_c.disconnect0(this, family);
}
private static final boolean runningOnMono = cli.System.Type.GetType("Mono.Runtime") != null;
}
// we don't support a dual-stack approach yet, so we simply make it an alias for the two-stacks approach
class DualStackPlainDatagramSocketImpl extends TwoStacksPlainDatagramSocketImpl {
// we need this method, because DatagramSocket uses reflection to check for this methods existance
protected int peekData(DatagramPacket p) throws IOException {
return super.peekData(p);
}
}