| /* |
| * Copyright (c) 2010, 2021, 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*/ @SuppressWarnings("removal") 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<Integer, Object> 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 ad) ) |
| throw new IllegalArgumentException("Unsupported address type"); |
| |
| 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 instanceof InetSocketAddress epoint)) |
| throw new IllegalArgumentException("Unsupported address type"); |
| 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<Map.Entry<Integer,Object>> options = optionsMap.entrySet(); |
| try { |
| for(Map.Entry<Integer,Object> 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(); |
| } |
| } |