X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fprotocol_plugins%2Fopenflow%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fprotocol_plugin%2Fopenflow%2Fcore%2Finternal%2FControllerIO.java;h=47461f472213874a6abb77633f6917af2993b1f7;hb=af3eaa839bf6f6c86495b24d2174eeb6624501c0;hp=868e2086511b5cd7926ccb08275cbda6bb270c9d;hpb=9b161b44607c305c5f36797fb2567dde1a445c14;p=controller.git

diff --git a/opendaylight/protocol_plugins/openflow/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/core/internal/ControllerIO.java b/opendaylight/protocol_plugins/openflow/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/core/internal/ControllerIO.java
index 868e208651..47461f4722 100644
--- a/opendaylight/protocol_plugins/openflow/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/core/internal/ControllerIO.java
+++ b/opendaylight/protocol_plugins/openflow/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/core/internal/ControllerIO.java
@@ -9,6 +9,9 @@
 package org.opendaylight.controller.protocol_plugin.openflow.core.internal;
 
 import java.io.IOException;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
 import java.nio.channels.SelectionKey;
 import java.nio.channels.Selector;
 import java.nio.channels.ServerSocketChannel;
@@ -24,6 +27,8 @@ public class ControllerIO {
             .getLogger(ControllerIO.class);
     private static Short defaultOpenFlowPort = 6633;
     private Short openFlowPort;
+    private InetAddress controllerIP;
+    private NetworkInterface netInt;
     private SelectionKey serverSelectionKey;
     private IController listener;
     private ServerSocketChannel serverSocket;
@@ -43,30 +48,41 @@ public class ControllerIO {
                         openFlowPort);
             }
         }
+        String addressString = System.getProperty("of.address");
+        if (addressString != null) {
+            try {
+                controllerIP = InetAddress.getByName(addressString);
+            } catch (Exception e) {
+                controllerIP = null;
+                logger.warn("Invalid IP: {}, use wildcard *", addressString);
+            }
+        } else {
+            controllerIP = null;
+        }
     }
 
     public void start() throws IOException {
         this.running = true;
-        // obtain a selector
-        this.selector = SelectorProvider.provider().openSelector();
-        // create the listening socket
-        this.serverSocket = ServerSocketChannel.open();
-        this.serverSocket.configureBlocking(false);
-        this.serverSocket.socket().bind(
-                new java.net.InetSocketAddress(openFlowPort));
-        this.serverSocket.socket().setReuseAddress(true);
-        // register this socket for accepting incoming connections
-        this.serverSelectionKey = this.serverSocket.register(selector,
-                SelectionKey.OP_ACCEPT);
+        this.netInt = null;
         controllerIOThread = new Thread(new Runnable() {
             @Override
             public void run() {
+                waitUntilInterfaceUp();
+                if (!startAcceptConnections()) {
+                    return;
+                }
+                logger.info("Controller is now listening on {}:{}",
+                        (controllerIP == null) ? "any" : controllerIP.getHostAddress(),
+                        openFlowPort);
+                boolean netInterfaceUp = true;
                 while (running) {
                     try {
                         // wait for an incoming connection
-                        selector.select(0);
+                        // check interface state every 5sec
+                        selector.select(5000);
                         Iterator<SelectionKey> selectedKeys = selector
                                 .selectedKeys().iterator();
+                        netInterfaceUp = isNetInterfaceUp(netInterfaceUp);
                         while (selectedKeys.hasNext()) {
                             SelectionKey skey = selectedKeys.next();
                             selectedKeys.remove();
@@ -82,9 +98,91 @@ public class ControllerIO {
             }
         }, "ControllerI/O Thread");
         controllerIOThread.start();
-        logger.info("Controller is now listening on port {}", openFlowPort);
     }
 
+    private boolean startAcceptConnections() {
+        if (running) {
+            try {
+                // obtain a selector
+                selector = SelectorProvider.provider().openSelector();
+                // create the listening socket
+                serverSocket = ServerSocketChannel.open();
+                serverSocket.configureBlocking(false);
+                serverSocket.socket().bind(
+                        new java.net.InetSocketAddress(controllerIP,
+                                openFlowPort));
+                serverSocket.socket().setReuseAddress(true);
+                // register this socket for accepting incoming
+                // connections
+                serverSelectionKey = serverSocket.register(selector,
+                        SelectionKey.OP_ACCEPT);
+            } catch (IOException e) {
+                logger.error(
+                        "Failed to listen on {}:{}, exit",
+                        (controllerIP == null) ? "" : controllerIP
+                                .getHostAddress(), openFlowPort);
+                return false;
+            }
+            return true;
+        }
+        return false;
+    }
+
+    private boolean isNetInterfaceUp(boolean currentlyUp) {
+        if (controllerIP == null) {
+            // for wildcard address, return since there is always an "up"
+            // interface (such as loopback)
+            return true;
+        }
+        boolean up;
+        try {
+            if (netInt == null) {
+                logger.warn("Can't find any operational interface for address {}",
+                        controllerIP.getHostAddress());
+                return false;
+            }
+            up = netInt.isUp();
+            if (!up) {
+                // always generate log if the interface is down
+                logger.warn("Interface {} with address {} is DOWN!",
+                        netInt.getDisplayName(),
+                        controllerIP.getHostAddress());
+            } else {
+                if (!currentlyUp) {
+                    // only generate log if the interface changes from down to up
+                    logger.trace("Interface {} with address {} is UP!",
+                            netInt.getDisplayName(),
+                            controllerIP.getHostAddress());
+                }
+            }
+        } catch (SocketException e) {
+            logger.warn("Interface {} with address {} is DOWN!",
+                    netInt.getDisplayName(),
+                    controllerIP.getHostAddress());
+           up = false;
+        }
+        return up;
+    }
+
+    private void waitUntilInterfaceUp() {
+        if (controllerIP == null) {
+            // for wildcard address, return since there is always an "up"
+            // interface (such as loopback)
+            return;
+        }
+        boolean isUp = false;
+        do {
+            try {
+                // get the network interface from the address
+                netInt = NetworkInterface.getByInetAddress(controllerIP);
+                isUp = isNetInterfaceUp(isUp);
+                if (!isUp) {
+                    Thread.sleep(5000);
+                }
+            } catch (Exception e) {
+            }
+        } while ((!isUp) && (running));
+    }
     public void shutDown() throws IOException {
         this.running = false;
         this.selector.wakeup();