Add workaround for connection problems with IPv6 link-local addresses and jdk < 7. See #267

common/src/main/java/io/netty/util/internal/SocketUtil.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2012 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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 io.netty.util.internal;
+
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.UnknownHostException;
+
+public final class SocketUtil {
+    
+    
+    private static final String ZONE_ID_SEPARATOR = "%";
+
+
+    /**
+     * Takes care of stripping the zone id from the {@link InetAddress} if its an {@link Inet6Address} and the java
+     * version is < 7. After that a new {@link InetSocketAddress} is created based on the old one.  This is needed because of a bug that exists in java
+     * versions < 7.
+     * 
+     * See https://github.com/netty/netty/issues/267
+     * 
+     */
+    public static InetSocketAddress stripZoneId(InetSocketAddress socketAddress) throws UnknownHostException {
+        return new InetSocketAddress(socketAddress.getAddress(), socketAddress.getPort());
+    }
+    
+    /**
+     * Takes care of stripping the zone id from the {@link InetAddress} if its an {@link Inet6Address} and the java
+     * version is < 7. This is needed because of a bug that exists in java versions < 7.
+     * 
+     * See https://github.com/netty/netty/issues/267
+     * 
+     */
+    public static InetAddress stripZoneId(InetAddress address) throws UnknownHostException {
+            // If we have a java version which is >= 7 we can just return the given
+            // InetSocketAddress as this bug only seems
+            // to exist in java 6 (and maybe also versions before)
+            if (DetectionUtil.javaVersion() >= 7) {
+                return address;
+            }
+
+            if (address instanceof Inet6Address) {
+                Inet6Address inet6Address = (Inet6Address) address;
+
+                // Check if its a LinkLocalAddress as this is the only one which is
+                // affected
+                if (inet6Address.isLinkLocalAddress()) {
+                    String hostaddress = inet6Address.getHostAddress();
+
+                    int separator = hostaddress.indexOf(ZONE_ID_SEPARATOR);
+
+                    // strip of the zoneId
+                    String withoutZonedId = inet6Address.getHostAddress().substring(0, separator);
+                    return InetAddress.getByName(withoutZonedId);
+                }
+            }
+            return address;
+        
+    }
+    
+    private SocketUtil() {
+        
+    }
+}

transport/src/main/java/io/netty/channel/socket/nio/NioClientSocketPipelineSink.java

@@ -27,7 +27,9 @@ import io.netty.channel.ChannelStateEvent;
 import io.netty.channel.MessageEvent;
 import io.netty.logging.InternalLogger;
 import io.netty.logging.InternalLoggerFactory;
+import io.netty.util.internal.SocketUtil;
 
+import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.nio.channels.ClosedChannelException;
 
@@ -99,6 +101,7 @@ class NioClientSocketPipelineSink extends AbstractNioChannelSink {
             final NioClientSocketChannel channel, final ChannelFuture cf,
             SocketAddress remoteAddress) {
         try {
+            remoteAddress = SocketUtil.stripZoneId((InetSocketAddress) remoteAddress);
             channel.getJdkChannel().connect(remoteAddress);
             channel.getCloseFuture().addListener(new ChannelFutureListener() {
                 @Override

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

@@ -18,6 +18,7 @@ package io.netty.channel.socket.oio;
 import static io.netty.channel.Channels.*;
 
 import java.io.PushbackInputStream;
+import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.util.concurrent.Executor;
 
@@ -29,6 +30,7 @@ import io.netty.channel.ChannelState;
 import io.netty.channel.ChannelStateEvent;
 import io.netty.channel.MessageEvent;
 import io.netty.util.internal.DeadLockProofWorker;
+import io.netty.util.internal.SocketUtil;
 
 class OioClientSocketPipelineSink extends AbstractOioChannelSink {
 
@@ -102,6 +104,8 @@ class OioClientSocketPipelineSink extends AbstractOioChannelSink {
         future.addListener(ChannelFutureListener.CLOSE_ON_FAILURE);
 
         try {
+            remoteAddress = SocketUtil.stripZoneId((InetSocketAddress) remoteAddress);
+
             channel.socket.connect(
                     remoteAddress, channel.getConfig().getConnectTimeoutMillis());
             connected = true;