Rewrite SslHandler / Reduce the chance of OIO-OIO dead lock

- SslHandler always begins handshake unless startTls is true
  - Removed issueHandshake property
  - If a user wants to start handshake later, he/she has to add 
    SslHandler later.
- Removed enableRenegotiation property
  - JDK upgrade fixes the security vulnerability - no need to complicate
    our code
- Some property name changes
  - getSSLEngineInboundCloseFuture() -> sslCloseFuture() 
- Updated securechat example
- Added timeout for handshake and close_notify for better security
  - However, it's currently hard-coded.  Will make it a property later.

example/src/main/java/io/netty/example/securechat/SecureChatClientHandler.java

@@ -17,7 +17,6 @@ package io.netty.example.securechat;
 
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelInboundMessageHandlerAdapter;
-import io.netty.handler.ssl.SslHandler;
 
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -30,16 +29,6 @@ public class SecureChatClientHandler extends ChannelInboundMessageHandlerAdapter
     private static final Logger logger = Logger.getLogger(
             SecureChatClientHandler.class.getName());
 
-    @Override
-    public void channelActive(ChannelHandlerContext ctx) throws Exception {
-        // Get the SslHandler from the pipeline
-        // which were added in SecureChatPipelineFactory.
-        SslHandler sslHandler = ctx.pipeline().get(SslHandler.class);
-
-        // Begin handshake.
-        sslHandler.handshake();
-    }
-
     @Override
     public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
         System.err.println(msg);

example/src/main/java/io/netty/example/securechat/SecureChatServerHandler.java

@@ -16,8 +16,6 @@
 package io.netty.example.securechat;
 
 import io.netty.channel.Channel;
-import io.netty.channel.ChannelFuture;
-import io.netty.channel.ChannelFutureListener;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelInboundMessageHandlerAdapter;
 import io.netty.channel.group.ChannelGroup;
@@ -40,13 +38,18 @@ public class SecureChatServerHandler extends ChannelInboundMessageHandlerAdapter
 
     @Override
     public void channelActive(ChannelHandlerContext ctx) throws Exception {
-        // Get the SslHandler in the current pipeline.
-        // We added it in SecureChatPipelineFactory.
-        final SslHandler sslHandler = ctx.pipeline().get(SslHandler.class);
+        // Once session is secured, send a greeting.
+        ctx.write(
+                "Welcome to " + InetAddress.getLocalHost().getHostName() +
+                " secure chat service!\n");
+        ctx.write(
+                "Your session is protected by " +
+                ctx.pipeline().get(SslHandler.class).getEngine().getSession().getCipherSuite() +
+                " cipher suite.\n");
 
-        // Get notified when SSL handshake is done.
-        ChannelFuture handshakeFuture = sslHandler.handshake();
-        handshakeFuture.addListener(new Greeter(sslHandler));
+        // Register the channel to the global channel list
+        // so the channel received the messages from others.
+        channels.add(ctx.channel());
     }
 
     @Override
@@ -74,33 +77,4 @@ public class SecureChatServerHandler extends ChannelInboundMessageHandlerAdapter
                 "Unexpected exception from downstream.", cause);
         ctx.close();
     }
-
-    private static final class Greeter implements ChannelFutureListener {
-
-        private final SslHandler sslHandler;
-
-        Greeter(SslHandler sslHandler) {
-            this.sslHandler = sslHandler;
-        }
-
-        @Override
-        public void operationComplete(ChannelFuture future) throws Exception {
-            if (future.isSuccess()) {
-                // Once session is secured, send a greeting.
-                future.channel().write(
-                        "Welcome to " + InetAddress.getLocalHost().getHostName() +
-                        " secure chat service!\n");
-                future.channel().write(
-                        "Your session is protected by " +
-                        sslHandler.getEngine().getSession().getCipherSuite() +
-                        " cipher suite.\n");
-
-                // Register the channel to the global channel list
-                // so the channel received the messages from others.
-                channels.add(future.channel());
-            } else {
-                future.channel().close();
-            }
-        }
-    }
 }

handler/pom.xml

@@ -39,11 +39,6 @@
       <artifactId>netty-transport</artifactId>
       <version>${project.version}</version>
     </dependency>
-    <dependency>
-      <groupId>${project.groupId}</groupId>
-      <artifactId>netty-codec</artifactId>
-      <version>${project.version}</version>
-    </dependency>
   </dependencies>
 
   <build>

testsuite/src/test/java/io/netty/testsuite/transport/socket/SocketSslEchoTest.java

@@ -92,15 +92,7 @@ public class SocketSslEchoTest extends AbstractSocketTest {
         Channel sc = sb.bind().sync().channel();
         Channel cc = cb.connect().sync().channel();
         ChannelFuture hf = cc.pipeline().get(SslHandler.class).handshake();
-        hf.awaitUninterruptibly();
-        if (!hf.isSuccess()) {
-            logger.error("Handshake failed", hf.cause());
-            sh.channel.close().awaitUninterruptibly();
-            ch.channel.close().awaitUninterruptibly();
-            sc.close().awaitUninterruptibly();
-        }
-
-        assertTrue(hf.isSuccess());
+        hf.sync();
 
         for (int i = 0; i < data.length;) {
             int length = Math.min(random.nextInt(1024 * 64), data.length - i);

transport/src/main/java/io/netty/channel/socket/oio/AbstractOioChannel.java

@@ -25,6 +25,8 @@ import java.net.SocketAddress;
 
 abstract class AbstractOioChannel extends AbstractChannel {
 
+    static final int SO_TIMEOUT = 1000;
+
     protected AbstractOioChannel(Channel parent, Integer id) {
         super(parent, id);
     }

transport/src/main/java/io/netty/channel/socket/oio/OioChildEventLoop.java

@@ -58,7 +58,21 @@ class OioChildEventLoop extends SingleThreadEventLoop {
                     // Waken up by interruptThread()
                 }
             } else {
-                runAllTasks();
+                long startTime = System.nanoTime();
+                for (;;) {
+                    final Runnable task = pollTask();
+                    if (task == null) {
+                        break;
+                    }
+
+                    task.run();
+
+                    // Ensure running tasks doesn't take too much time.
+                    if (System.nanoTime() - startTime > AbstractOioChannel.SO_TIMEOUT * 1000000L) {
+                        break;
+                    }
+                }
+
                 ch.unsafe().read();
 
                 // Handle deregistration

transport/src/main/java/io/netty/channel/socket/oio/OioDatagramChannel.java

@@ -69,7 +69,7 @@ public class OioDatagramChannel extends AbstractOioMessageChannel
 
         boolean success = false;
         try {
-            socket.setSoTimeout(1000);
+            socket.setSoTimeout(SO_TIMEOUT);
             socket.setBroadcast(false);
             success = true;
         } catch (SocketException e) {

transport/src/main/java/io/netty/channel/socket/oio/OioServerSocketChannel.java

@@ -66,7 +66,7 @@ public class OioServerSocketChannel extends AbstractOioMessageChannel
 
         boolean success = false;
         try {
-            socket.setSoTimeout(1000);
+            socket.setSoTimeout(SO_TIMEOUT);
             success = true;
         } catch (IOException e) {
             throw new ChannelException(

transport/src/main/java/io/netty/channel/socket/oio/OioSocketChannel.java

@@ -62,7 +62,7 @@ public class OioSocketChannel extends AbstractOioStreamChannel
                 is = socket.getInputStream();
                 os = socket.getOutputStream();
             }
-            socket.setSoTimeout(1000);
+            socket.setSoTimeout(SO_TIMEOUT);
             success = true;
         } catch (Exception e) {
             throw new ChannelException("failed to initialize a socket", e);