CORD-512 Support vSG <-> vRouter default route

- Support multiple subnets per port. getIpPort() will only return the first non-/32 and non-/0 subnet
    /32 is used as vSG subnet
    /0 is used as default gateway
- Support multiple L3 unicast group on a single port
    Change the way to generate the group ID and group key
- Special case for 0.0.0.0 host. Push a /0 to IP table instead of /32
- Implement vRouterConfig
    Put VR MAC to TMAC table of all leaves when config added
        When processEthDst see PortNumber.ANY in key, match ETH_DST only
- For OFDPA, wipe existing instruction before sending to controller
    So packet that misses L3 unicast table won't be sent to controller twice
- For SpringOpenTTP, pop VLAN before sending to controller
- Move several constant definitions to SegmentRoutingService
- Add minimum priority for IP rules such that /0 won't collide with zero priority default rules
- Update the config sample
    Use VLAN=-1 for hosts
    Add example for default route

Change-Id: Id751697ce36a7e5c13b3859350ff21b585c38525
diff --git a/apps/segmentrouting/src/test/java/org/onosproject/segmentrouting/config/SegmentRoutingAppConfigTest.java b/apps/segmentrouting/src/test/java/org/onosproject/segmentrouting/config/SegmentRoutingAppConfigTest.java
new file mode 100644
index 0000000..7755059
--- /dev/null
+++ b/apps/segmentrouting/src/test/java/org/onosproject/segmentrouting/config/SegmentRoutingAppConfigTest.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * Licensed 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 org.onosproject.segmentrouting.config;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.ImmutableSet;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.MacAddress;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.TestApplicationId;
+import org.onosproject.net.config.Config;
+import org.onosproject.net.config.ConfigApplyDelegate;
+import org.onosproject.segmentrouting.SegmentRoutingService;
+import java.util.Set;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for class {@link SegmentRoutingAppConfig}.
+ */
+public class SegmentRoutingAppConfigTest {
+    private static final ApplicationId APP_ID =
+            new TestApplicationId(SegmentRoutingService.SR_APP_ID);
+
+    private SegmentRoutingAppConfig config;
+    private MacAddress routerMac1;
+    private MacAddress routerMac2;
+    private MacAddress routerMac3;
+
+    /**
+     * Initialize test related variables.
+     *
+     * @throws Exception
+     */
+    @Before
+    public void setUp() throws Exception {
+        String jsonString = "{" +
+                "\"vRouterMacs\" : [" +
+                "    \"00:00:00:00:00:01\"," +
+                "    \"00:00:00:00:00:02\"" +
+                "]}";
+
+        routerMac1 = MacAddress.valueOf("00:00:00:00:00:01");
+        routerMac2 = MacAddress.valueOf("00:00:00:00:00:02");
+        routerMac3 = MacAddress.valueOf("00:00:00:00:00:03");
+
+        ApplicationId subject = APP_ID;
+        String key = SegmentRoutingService.SR_APP_ID;
+        ObjectMapper mapper = new ObjectMapper();
+        JsonNode jsonNode = mapper.readTree(jsonString);
+        ConfigApplyDelegate delegate = new MockDelegate();
+
+        config = new SegmentRoutingAppConfig();
+        config.init(subject, key, jsonNode, mapper, delegate);
+    }
+
+    /**
+     * Tests vRouters getter.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testVRouters() throws Exception {
+        assertTrue(config.isValid());
+
+        Set<MacAddress> vRouters = config.vRouterMacs();
+        assertThat(vRouters.size(), is(2));
+        assertTrue(vRouters.contains(routerMac1));
+        assertTrue(vRouters.contains(routerMac2));
+    }
+
+    /**
+     * Tests vRouters setter.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testSetVRouters() throws Exception {
+        ImmutableSet.Builder<MacAddress> builder = ImmutableSet.builder();
+        builder.add(routerMac3);
+        config.setVRouterMacs(builder.build());
+
+        Set<MacAddress> macs = config.vRouterMacs();
+        assertThat(macs.size(), is(1));
+        assertTrue(macs.contains(routerMac3));
+    }
+
+    private class MockDelegate implements ConfigApplyDelegate {
+        @Override
+        public void onApply(Config config) {
+        }
+    }
+}
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