creating a default subnet

This changes how SwitchManager handles subnets so that when there are
no configured subents, it returns a default subnet that spans all ports
in the network and spans all IP addresses, i.e., 0.0.0.0/0.

This makes it so that HostTracker will discover all hosts by default
instead of only discovering hosts in configured subents. This, in turn,
makes SimpleForwarding forward traffic correctly without any
configuration.

Change-Id: Ice31b6035b970dd69fc69df3d9560b4aac41630d
Signed-off-by: Colin Dixon <ckd@us.ibm.com>

diff --git a/opendaylight/northbound/integrationtest/src/test/java/org/opendaylight/controller/northbound/integrationtest/NorthboundIT.java b/opendaylight/northbound/integrationtest/src/test/java/org/opendaylight/controller/northbound/integrationtest/NorthboundIT.java
index 7bec2722bf96fd1e9b3b645203aa67c8a6b4f36c..602de9a1c6f28f8e195ed0aa00c78bd82f3da434 100644 (file)
--- a/opendaylight/northbound/integrationtest/src/test/java/org/opendaylight/controller/northbound/integrationtest/NorthboundIT.java
+++ b/opendaylight/northbound/integrationtest/src/test/java/org/opendaylight/controller/northbound/integrationtest/NorthboundIT.java
@@ -310,7 +310,7 @@ public class NorthboundIT {
         JSONTokener jt = new JSONTokener(result);
         JSONObject json = new JSONObject(jt);
         JSONArray subnetConfigs = json.getJSONArray("subnetConfig");
-        Assert.assertEquals(subnetConfigs.length(), 0);
+        Assert.assertEquals(subnetConfigs.length(), 1); // should only get the default subnet
 
         // Test GET subnet1 expecting 404
         result = getJsonResult(baseURL + "default/subnet/" + name1);

diff --git a/opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java b/opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java
index 99482debd6d7e51c84415d3064ed38d05b5ca77e..4d2aea203601dafe6e19fcacc208ae4760819b0f 100644 (file)
--- a/opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java
+++ b/opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java
@@ -111,6 +111,19 @@ public class SwitchManager implements ISwitchManager, IConfigurationContainerAwa
     private boolean isDefaultContainer = true;
     private static final int REPLACE_RETRY = 1;
 
+    /* Information about the default subnet. If there have been no configured subnets, i.e.,
+     * subnets.size() == 0 or subnetsConfigList.size() == 0, then this subnet will be the
+     * only subnet returned. As soon as a user-configured subnet is created this one will
+     * vanish.
+     */
+    protected static SubnetConfig DEFAULT_SUBNETCONFIG;
+    protected static Subnet DEFAULT_SUBNET;
+    protected static String DEFAULT_SUBNET_NAME = "default (cannot be modifed)";
+    static{
+        DEFAULT_SUBNETCONFIG = new SubnetConfig(DEFAULT_SUBNET_NAME, "0.0.0.0/0", new ArrayList<String>());
+        DEFAULT_SUBNET = new Subnet(DEFAULT_SUBNETCONFIG);
+    }
+
     public void notifySubnetChange(Subnet sub, boolean add) {
         synchronized (switchManagerAware) {
             for (Object subAware : switchManagerAware) {
@@ -295,12 +308,22 @@ public class SwitchManager implements ISwitchManager, IConfigurationContainerAwa
 
     @Override
     public List<SubnetConfig> getSubnetsConfigList() {
-        return new ArrayList<SubnetConfig>(subnetsConfigList.values());
+        // if there are no subnets, return the default subnet
+        if(subnetsConfigList.size() == 0){
+            return Collections.singletonList(DEFAULT_SUBNETCONFIG);
+        }else{
+            return new ArrayList<SubnetConfig>(subnetsConfigList.values());
+        }
     }
 
     @Override
     public SubnetConfig getSubnetConfig(String subnet) {
-        return subnetsConfigList.get(subnet);
+        // if there are no subnets, return the default subnet
+        if(subnetsConfigList.size() == 0 && subnet == DEFAULT_SUBNET_NAME){
+            return DEFAULT_SUBNETCONFIG;
+        }else{
+            return subnetsConfigList.get(subnet);
+        }
     }
 
     private List<SpanConfig> getSpanConfigList(Node node) {
@@ -646,6 +669,11 @@ public class SwitchManager implements ISwitchManager, IConfigurationContainerAwa
 
     @Override
     public Subnet getSubnetByNetworkAddress(InetAddress networkAddress) {
+        // if there are no subnets, return the default subnet
+        if (subnets.size() == 0) {
+            return DEFAULT_SUBNET;
+        }
+
         Subnet sub;
         Set<InetAddress> indices = subnets.keySet();
         for (InetAddress i : indices) {