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/*
* Copyright (c) 2010, 2019, 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.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* Basic SocketImpl that relies on the internal HTTP protocol handler
* implementation to perform the HTTP tunneling and authentication. Once
* connected, all socket operations delegate to a platform SocketImpl.
*
* @since 1.8
*/
/*package*/ class HttpConnectSocketImpl extends DelegatingSocketImpl {
private static final String httpURLClazzStr =
"sun.net.www.protocol.http.HttpURLConnection";
private static final String netClientClazzStr = "sun.net.NetworkClient";
private static final String doTunnelingStr = "doTunneling";
private static final Field httpField;
private static final Field serverSocketField;
private static final Method doTunneling;
private final String server;
private final Socket socket;
private InetSocketAddress external_address;
private HashMap optionsMap = new HashMap<>();
static {
try {
Class httpClazz = Class.forName(httpURLClazzStr, true, null);
httpField = httpClazz.getDeclaredField("http");
doTunneling = httpClazz.getDeclaredMethod(doTunnelingStr);
Class netClientClazz = Class.forName(netClientClazzStr, true, null);
serverSocketField = netClientClazz.getDeclaredField("serverSocket");
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<>() {
public Void run() {
httpField.setAccessible(true);
serverSocketField.setAccessible(true);
return null;
}
});
} catch (ReflectiveOperationException x) {
throw new InternalError("Should not reach here", x);
}
}
HttpConnectSocketImpl(Proxy proxy, SocketImpl delegate, Socket socket) {
super(delegate);
this.socket = socket;
SocketAddress a = proxy.address();
if ( !(a instanceof InetSocketAddress) )
throw new IllegalArgumentException("Unsupported address type");
InetSocketAddress ad = (InetSocketAddress) a;
server = ad.getHostString();
port = ad.getPort();
}
@Override
protected void connect(String host, int port) throws IOException {
connect(new InetSocketAddress(host, port), 0);
}
@Override
protected void connect(InetAddress address, int port) throws IOException {
connect(new InetSocketAddress(address, port), 0);
}
@Override
protected void connect(SocketAddress endpoint, int timeout)
throws IOException
{
if (endpoint == null || !(endpoint instanceof InetSocketAddress))
throw new IllegalArgumentException("Unsupported address type");
final InetSocketAddress epoint = (InetSocketAddress)endpoint;
String destHost = epoint.isUnresolved() ? epoint.getHostName()
: epoint.getAddress().getHostAddress();
final int destPort = epoint.getPort();
SecurityManager security = System.getSecurityManager();
if (security != null)
security.checkConnect(destHost, destPort);
if (destHost.contains(":"))
destHost = "[" + destHost + "]";
// Connect to the HTTP proxy server
String urlString = "http://" + destHost + ":" + destPort;
Socket httpSocket = privilegedDoTunnel(urlString, timeout);
// Success!
external_address = epoint;
// close the original socket impl and release its descriptor
close();
// update the Sockets impl to the impl from the http Socket
SocketImpl si = httpSocket.impl;
socket.setImpl(si);
// best effort is made to try and reset options previously set
Set> options = optionsMap.entrySet();
try {
for(Map.Entry entry : options) {
si.setOption(entry.getKey(), entry.getValue());
}
} catch (IOException x) { /* gulp! */ }
}
@Override
protected void listen(int backlog) {
throw new InternalError("should not get here");
}
@Override
protected void accept(SocketImpl s) {
throw new InternalError("should not get here");
}
@Override
void reset() {
throw new InternalError("should not get here");
}
@Override
public void setOption(int opt, Object val) throws SocketException {
delegate.setOption(opt, val);
if (external_address != null)
return; // we're connected, just return
// store options so that they can be re-applied to the impl after connect
optionsMap.put(opt, val);
}
private Socket privilegedDoTunnel(final String urlString,
final int timeout)
throws IOException
{
try {
return java.security.AccessController.doPrivileged(
new java.security.PrivilegedExceptionAction<>() {
public Socket run() throws IOException {
return doTunnel(urlString, timeout);
}
});
} catch (java.security.PrivilegedActionException pae) {
throw (IOException) pae.getException();
}
}
private Socket doTunnel(String urlString, int connectTimeout)
throws IOException
{
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(server, port));
URL destURL = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) destURL.openConnection(proxy);
conn.setConnectTimeout(connectTimeout);
int timeout = (int) getOption(SocketOptions.SO_TIMEOUT);
if (timeout > 0) {
conn.setReadTimeout(timeout);
}
conn.connect();
doTunneling(conn);
try {
Object httpClient = httpField.get(conn);
return (Socket) serverSocketField.get(httpClient);
} catch (IllegalAccessException x) {
throw new InternalError("Should not reach here", x);
}
}
private void doTunneling(HttpURLConnection conn) throws IOException {
try {
doTunneling.invoke(conn);
} catch (ReflectiveOperationException x) {
Throwable cause = x.getCause();
if (cause instanceof IOException) {
throw (IOException) cause;
}
throw new InternalError("Should not reach here", x);
}
}
@Override
protected InetAddress getInetAddress() {
if (external_address != null)
return external_address.getAddress();
else
return delegate.getInetAddress();
}
@Override
protected int getPort() {
if (external_address != null)
return external_address.getPort();
else
return delegate.getPort();
}
}
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