Add ProxySocketFactory

src/main/java/com/hierynomus/sshj/common/ProxySocketFactory.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C)2009 - SSHJ Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.hierynomus.sshj.common;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.Proxy;
+import java.net.Socket;
+import java.net.UnknownHostException;
+
+import javax.net.SocketFactory;
+
+/**
+ * A {@link SocketFactory} that creates sockets using a {@link Proxy}.
+ */
+class ProxySocketFactory extends SocketFactory {
+
+    private Proxy proxy;
+
+    public ProxySocketFactory(Proxy proxy) {
+        this.proxy = proxy;
+    }
+
+    public ProxySocketFactory(Proxy.Type proxyType, InetSocketAddress proxyAddress) {
+        this(new Proxy(proxyType, proxyAddress));
+    }
+
+    @Override
+    public Socket createSocket() throws IOException {
+        return new Socket(proxy);
+    }
+
+    @Override
+    public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort)
+            throws IOException {
+        Socket s = createSocket();
+        s.bind(new InetSocketAddress(localAddress, localPort));
+        s.connect(new InetSocketAddress(address, port));
+        return s;
+    }
+
+    @Override
+    public Socket createSocket(InetAddress host, int port) throws IOException {
+        Socket s = createSocket();
+        s.connect(new InetSocketAddress(host, port));
+        return s;
+    }
+
+    @Override
+    public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
+        Socket s = createSocket();
+        s.connect(new InetSocketAddress(host, port));
+        return s;
+    }
+
+    @Override
+    public Socket createSocket(String host, int port, InetAddress localHost, int localPort)
+            throws IOException, UnknownHostException {
+        Socket s = createSocket();
+        s.bind(new InetSocketAddress(localHost, localPort));
+        s.connect(new InetSocketAddress(host, port));
+        return s;
+    }
+}