/* * Copyright (c) 2009, 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 sun.net; import java.net.InetAddress; import java.io.FileDescriptor; import java.io.IOException; import java.security.AccessController; import java.security.PrivilegedAction; import sun.security.action.GetPropertyAction; /** * Defines static methods to be invoked prior to binding or connecting TCP sockets. */ public final class NetHooks { /** * A provider with hooks to allow sockets be converted prior to binding or * connecting a TCP socket. * *

Concrete implementations of this class should define a zero-argument * constructor and implement the abstract methods specified below. */ public static abstract class Provider { /** * Initializes a new instance of this class. */ protected Provider() {} /** * Invoked prior to binding a TCP socket. */ public abstract void implBeforeTcpBind(FileDescriptor fdObj, InetAddress address, int port) throws IOException; /** * Invoked prior to connecting an unbound TCP socket. */ public abstract void implBeforeTcpConnect(FileDescriptor fdObj, InetAddress address, int port) throws IOException; } /** * For now, we load the SDP provider on Solaris. In the future this may * be changed to use the ServiceLoader facility to allow the deployment of * other providers. */ private static final Provider provider = new sun.net.sdp.SdpProvider(); /** * Invoke prior to binding a TCP socket. */ public static void beforeTcpBind(FileDescriptor fdObj, InetAddress address, int port) throws IOException { provider.implBeforeTcpBind(fdObj, address, port); } /** * Invoke prior to connecting an unbound TCP socket. */ public static void beforeTcpConnect(FileDescriptor fdObj, InetAddress address, int port) throws IOException { provider.implBeforeTcpConnect(fdObj, address, port); } }