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// **********************************************************************
//
// Copyright (c) 2003-2013 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceInternal;
public final class SOCKSNetworkProxy implements NetworkProxy
{
public SOCKSNetworkProxy(String host, int port)
{
_host = host;
_port = port;
}
private SOCKSNetworkProxy(java.net.InetSocketAddress address)
{
_address = address;
}
public void beginWriteConnectRequest(java.net.InetSocketAddress endpoint, Buffer buf)
{
final java.net.InetAddress addr = endpoint.getAddress();
if(addr == null)
{
throw new Ice.FeatureNotSupportedException("SOCKS4 does not support domain names");
}
else if(!(addr instanceof java.net.Inet4Address))
{
throw new Ice.FeatureNotSupportedException("SOCKS4 only supports IPv4 addresses");
}
//
// SOCKS connect request
//
buf.resize(9, false);
final java.nio.ByteOrder order = buf.b.order();
buf.b.order(java.nio.ByteOrder.BIG_ENDIAN); // Network byte order.
buf.b.position(0);
buf.b.put((byte)0x04); // SOCKS version 4.
buf.b.put((byte)0x01); // Command, establish a TCP/IP stream connection
buf.b.putShort((short)endpoint.getPort()); // Port
buf.b.put(addr.getAddress()); // IPv4 address
buf.b.put((byte)0x00); // User ID.
buf.b.position(0);
buf.b.limit(buf.size());
buf.b.order(order);
}
public void endWriteConnectRequest(Buffer buf)
{
buf.reset();
}
public void beginReadConnectRequestResponse(Buffer buf)
{
//
// Read the SOCKS4 response whose size is 8 bytes.
//
buf.resize(8, true);
buf.b.position(0);
}
public void endReadConnectRequestResponse(Buffer buf)
{
buf.b.position(0);
byte b1 = buf.b.get();
byte b2 = buf.b.get();
if(b1 != 0x00 || b2 != 0x5a)
{
throw new Ice.ConnectFailedException();
}
buf.reset();
}
public NetworkProxy resolveHost()
{
assert(_host != null);
return new SOCKSNetworkProxy(Network.getAddresses(_host,
_port,
Network.EnableIPv4,
Ice.EndpointSelectionType.Random,
false).get(0));
}
public java.net.InetSocketAddress getAddress()
{
assert(_address != null); // Host must be resolved.
return _address;
}
public String getName()
{
return "SOCKS";
}
private String _host;
private int _port;
private java.net.InetSocketAddress _address;
}
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