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// **********************************************************************
//
// Copyright (c) 2001
// ZeroC, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
package IceInternal;
final class UdpTransceiver implements Transceiver
{
public java.nio.channels.SelectableChannel
fd()
{
assert(_fd != null);
return _fd;
}
public void
close()
{
if(_traceLevels.network >= 1)
{
String s = "closing udp connection\n" + toString();
_logger.trace(_traceLevels.networkCat, s);
}
assert(_fd != null);
try
{
_fd.close();
}
catch(java.io.IOException ex)
{
}
_fd = null;
}
public void
shutdown()
{
}
public void
write(BasicStream stream, int timeout)
{
java.nio.ByteBuffer buf = stream.prepareWrite();
assert(buf.position() == 0);
final int packetSize = 64 * 1024; // TODO: configurable
assert(packetSize >= buf.limit()); // TODO: exception
while(buf.hasRemaining())
{
try
{
assert(_fd != null);
int ret = _fd.write(buf);
if(_traceLevels.network >= 3)
{
String s = "sent " + ret + " bytes via udp\n" + toString();
_logger.trace(_traceLevels.networkCat, s);
}
assert(ret == buf.limit());
break;
}
catch(java.io.InterruptedIOException ex)
{
continue;
}
catch(java.io.IOException ex)
{
Ice.SocketException se = new Ice.SocketException();
se.initCause(ex);
throw se;
}
}
}
public void
read(BasicStream stream, int timeout)
{
assert(stream.pos() == 0);
final int packetSize = 64 * 1024; // TODO: configurable
stream.resize(packetSize, true);
java.nio.ByteBuffer buf = stream.prepareRead();
buf.position(0);
int ret = 0;
while(true)
{
if(_connect)
{
//
// If we must connect, then we connect to the first peer that
// sends us a packet.
//
try
{
assert(_fd != null);
java.net.InetSocketAddress peerAddr = (java.net.InetSocketAddress)_fd.receive(buf);
ret = buf.position();
Network.doConnect(_fd, peerAddr, -1);
_connect = false; // We're connected now
if(_traceLevels.network >= 1)
{
String s = "connected udp socket\n" + toString();
_logger.trace(_traceLevels.networkCat, s);
}
}
catch(java.io.InterruptedIOException ex)
{
continue;
}
catch(java.io.IOException ex)
{
Ice.SocketException se = new Ice.SocketException();
se.initCause(ex);
throw se;
}
}
else
{
try
{
assert(_fd != null);
_fd.receive(buf);
ret = buf.position();
}
catch(java.io.InterruptedIOException ex)
{
continue;
}
catch(java.io.IOException ex)
{
Ice.SocketException se = new Ice.SocketException();
se.initCause(ex);
throw se;
}
}
break;
}
if(_traceLevels.network >= 3)
{
String s = "received " + ret + " bytes via udp\n" + toString();
_logger.trace(_traceLevels.networkCat, s);
}
stream.resize(ret, true);
stream.pos(ret);
}
public String
toString()
{
return Network.fdToString(_fd);
}
public final boolean
equivalent(String host, int port)
{
java.net.InetSocketAddress addr = Network.getAddress(host, port);
return addr.equals(_addr);
}
public final int
effectivePort()
{
return _addr.getPort();
}
//
// Only for use by UdpEndpoint
//
UdpTransceiver(Instance instance, String host, int port)
{
_traceLevels = instance.traceLevels();
_logger = instance.logger();
_incoming = false;
_connect = true;
try
{
_fd = Network.createUdpSocket();
Network.setBlock(_fd, false);
_addr = Network.getAddress(host, port);
Network.doConnect(_fd, _addr, -1);
_connect = false; // We're connected now
if(_traceLevels.network >= 1)
{
String s = "starting to send udp packets\n" + toString();
_logger.trace(_traceLevels.networkCat, s);
}
}
catch(Ice.LocalException ex)
{
_fd = null;
throw ex;
}
}
//
// Only for use by UdpEndpoint
//
UdpTransceiver(Instance instance, String host, int port, boolean connect)
{
_traceLevels = instance.traceLevels();
_logger = instance.logger();
_incoming = true;
_connect = connect;
try
{
_fd = Network.createUdpSocket();
Network.setBlock(_fd, false);
java.net.InetSocketAddress addr = new java.net.InetSocketAddress(host, port);
_addr = Network.doBind(_fd, addr);
if(_traceLevels.network >= 1)
{
String s = "starting to receive udp packets\n" + toString();
_logger.trace(_traceLevels.networkCat, s);
}
}
catch(Ice.LocalException ex)
{
_fd = null;
throw ex;
}
}
protected void
finalize()
throws Throwable
{
assert(_fd == null);
super.finalize();
}
private TraceLevels _traceLevels;
private Ice.Logger _logger;
private boolean _incoming;
private boolean _connect;
private java.nio.channels.DatagramChannel _fd;
private java.net.InetSocketAddress _addr;
}
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