1/* 2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.net; 27 28import java.net.InetAddress; 29import java.io.FileDescriptor; 30import java.io.IOException; 31 32/** 33 * Defines static methods to be invoked prior to binding or connecting TCP sockets. 34 */ 35 36public final class NetHooks { 37 38 /** 39 * A provider with hooks to allow sockets be converted prior to binding or 40 * connecting a TCP socket. 41 * 42 * <p> Concrete implementations of this class should define a zero-argument 43 * constructor and implement the abstract methods specified below. 44 */ 45 public abstract static class Provider { 46 /** 47 * Initializes a new instance of this class. 48 */ 49 protected Provider() {} 50 51 /** 52 * Invoked prior to binding a TCP socket. 53 */ 54 public abstract void implBeforeTcpBind(FileDescriptor fdObj, 55 InetAddress address, 56 int port) 57 throws IOException; 58 59 /** 60 * Invoked prior to connecting an unbound TCP socket. 61 */ 62 public abstract void implBeforeTcpConnect(FileDescriptor fdObj, 63 InetAddress address, 64 int port) 65 throws IOException; 66 } 67 68 /** 69 * For now, we load the SDP provider on Solaris. In the future this may 70 * be changed to use the ServiceLoader facility to allow the deployment of 71 * other providers. 72 */ 73 private static final Provider provider = new sun.net.sdp.SdpProvider(); 74 75 /** 76 * Invoke prior to binding a TCP socket. 77 */ 78 public static void beforeTcpBind(FileDescriptor fdObj, 79 InetAddress address, 80 int port) 81 throws IOException 82 { 83 provider.implBeforeTcpBind(fdObj, address, port); 84 } 85 86 /** 87 * Invoke prior to connecting an unbound TCP socket. 88 */ 89 public static void beforeTcpConnect(FileDescriptor fdObj, 90 InetAddress address, 91 int port) 92 throws IOException 93 { 94 provider.implBeforeTcpConnect(fdObj, address, port); 95 } 96} 97