Merge "Bug 1362: New AsyncWriteTransaction#submit method"

[controller.git] / opendaylight / netconf / netconf-ssh / src / main / java / org / opendaylight / controller / netconf / ssh / NetconfSSHServer.java

diff --git a/opendaylight/netconf/netconf-ssh/src/main/java/org/opendaylight/controller/netconf/ssh/NetconfSSHServer.java b/opendaylight/netconf/netconf-ssh/src/main/java/org/opendaylight/controller/netconf/ssh/NetconfSSHServer.java
index dad149fd60b762704fbf4c5f4d79882c51b8b676..670f50ddd09f9b3b80d855ce244f4a4cce47da14 100644 (file)
--- a/opendaylight/netconf/netconf-ssh/src/main/java/org/opendaylight/controller/netconf/ssh/NetconfSSHServer.java
+++ b/opendaylight/netconf/netconf-ssh/src/main/java/org/opendaylight/controller/netconf/ssh/NetconfSSHServer.java
@@ -1,32 +1,107 @@
-/*\r
- * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.\r
- *\r
- * This program and the accompanying materials are made available under the\r
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,\r
- * and is available at http://www.eclipse.org/legal/epl-v10.html\r
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
  */
 package org.opendaylight.controller.netconf.ssh;
 
+import com.google.common.annotations.VisibleForTesting;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.local.LocalAddress;
+import java.io.IOException;
+import java.net.InetSocketAddress;
 import java.net.ServerSocket;
+import java.net.Socket;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicLong;
+import javax.annotation.concurrent.ThreadSafe;
+import org.opendaylight.controller.netconf.ssh.authentication.AuthProvider;
+import org.opendaylight.controller.netconf.ssh.threads.Handshaker;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-public class NetconfSSHServer  {
+/**
+ * Thread that accepts client connections. Accepted socket is forwarded to {@link org.opendaylight.controller.netconf.ssh.threads.Handshaker},
+ * which is executed in {@link #handshakeExecutor}.
+ */
+@ThreadSafe
+public final class NetconfSSHServer extends Thread implements AutoCloseable {
+
+    private static final Logger logger = LoggerFactory.getLogger(NetconfSSHServer.class);
+    private static final AtomicLong sessionIdCounter = new AtomicLong();
 
-    private static boolean acceptMore = true;
-    private static final int SERVER_PORT = 830;
-    private ServerSocket ss = null;
+    private final ServerSocket serverSocket;
+    private final LocalAddress localAddress;
+    private final EventLoopGroup bossGroup;
+    private final AuthProvider authProvider;
+    private final ExecutorService handshakeExecutor;
+    private volatile boolean up;
 
-    private NetconfSSHServer() throws Exception{
-        this.ss = new ServerSocket(SERVER_PORT);
-        while (acceptMore) {
-            SocketThread.start(ss.accept());
+    private NetconfSSHServer(int serverPort, LocalAddress localAddress, AuthProvider authProvider, EventLoopGroup bossGroup) throws IOException {
+        super(NetconfSSHServer.class.getSimpleName());
+        this.bossGroup = bossGroup;
+        logger.trace("Creating SSH server socket on port {}", serverPort);
+        this.serverSocket = new ServerSocket(serverPort);
+        if (serverSocket.isBound() == false) {
+            throw new IllegalStateException("Socket can't be bound to requested port :" + serverPort);
         }
+        logger.trace("Server socket created.");
+        this.localAddress = localAddress;
+        this.authProvider = authProvider;
+        this.up = true;
+        handshakeExecutor = Executors.newFixedThreadPool(10);
     }
-    public static NetconfSSHServer start() throws Exception {
-        return new NetconfSSHServer();
+
+    public static NetconfSSHServer start(int serverPort, LocalAddress localAddress, AuthProvider authProvider, EventLoopGroup bossGroup) throws IOException {
+        NetconfSSHServer netconfSSHServer = new NetconfSSHServer(serverPort, localAddress, authProvider, bossGroup);
+        netconfSSHServer.start();
+        return netconfSSHServer;
     }
 
-    public void stop() throws Exception {
-           ss.close();
+    @Override
+    public void close() throws IOException {
+        up = false;
+        logger.trace("Closing SSH server socket.");
+        serverSocket.close();
+        bossGroup.shutdownGracefully();
+        logger.trace("SSH server socket closed.");
     }
 
+    @VisibleForTesting
+    public InetSocketAddress getLocalSocketAddress() {
+        return (InetSocketAddress) serverSocket.getLocalSocketAddress();
+    }
+
+    @Override
+    public void run() {
+        while (up) {
+            Socket acceptedSocket = null;
+            try {
+                acceptedSocket = serverSocket.accept();
+            } catch (IOException e) {
+                if (up == false) {
+                    logger.trace("Exiting server thread", e);
+                } else {
+                    logger.warn("Exception occurred during socket.accept", e);
+                }
+            }
+            if (acceptedSocket != null) {
+                try {
+                    Handshaker task = new Handshaker(acceptedSocket, localAddress, sessionIdCounter.incrementAndGet(), authProvider, bossGroup);
+                    handshakeExecutor.submit(task);
+                } catch (IOException e) {
+                    logger.warn("Cannot set PEMHostKey, closing connection", e);
+                    try {
+                        acceptedSocket.close();
+                    } catch (IOException e1) {
+                        logger.warn("Ignoring exception while closing socket", e);
+                    }
+                }
+            }
+        }
+        logger.debug("Server thread is exiting");
+    }
 }