vRouter: ignore routes that don't come from Quagga

Change-Id: I1a67a18b7f5f0a4e43156c017b92c12789e81104

@@ -41,6 +41,7 @@ import org.onosproject.routing.fpm.protocol.RouteAttribute;
 import org.onosproject.routing.fpm.protocol.RouteAttributeDst;
 import org.onosproject.routing.fpm.protocol.RouteAttributeGateway;
 import org.onosproject.routing.fpm.protocol.RtNetlink;
+import org.onosproject.routing.fpm.protocol.RtProtocol;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -145,6 +146,11 @@ public class FpmManager implements RouteSourceService {
             log.trace("Received FPM message: {}", fpmMessage);
         }
 
+        if (rtNetlink.protocol() != RtProtocol.ZEBRA) {
+            log.trace("Ignoring non-zebra route");
+            return;
+        }
+
         IpAddress dstAddress = null;
         IpAddress gateway = null;
 

@@ -43,7 +43,7 @@ public final class RtNetlink {
     private final int srcLength;
     private final short tos;
     private final short table;
-    private final short protocol;
+    private final RtProtocol protocol;
     private final short scope;
     private final short type;
     private final long flags;
@@ -69,7 +69,7 @@ public final class RtNetlink {
                       int srcLength,
                       short tos,
                       short table,
-                      short protocol,
+                      RtProtocol protocol,
                       short scope,
                       short type,
                       long flags,
@@ -139,7 +139,7 @@ public final class RtNetlink {
      *
      * @return protocol
      */
-    public short protocol() {
+    public RtProtocol protocol() {
         return protocol;
     }
 
@@ -222,6 +222,8 @@ public final class RtNetlink {
         long flags = Integer.reverseBytes(bb.getInt());
         List<RouteAttribute> attributes = new ArrayList<>();
 
+        RtProtocol rtProtocol = RtProtocol.get(protocol);
+
         while (bb.hasRemaining()) {
             RouteAttribute attribute = RouteAttribute.decode(buffer, bb.position(),
                     bb.limit() - bb.position());
@@ -235,7 +237,7 @@ public final class RtNetlink {
                 srcLength,
                 tos,
                 table,
-                protocol,
+                rtProtocol,
                 scope,
                 type,
                 flags,

+/*
+ * 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.routing.fpm.protocol;
+
+/**
+ * RtNetlink protocol value.
+ * <p>
+ * This is a subset of the protocol values used in rtnetlink.
+ * Taken from linux/rtnetlink.h
+ * </p>
+ */
+public enum RtProtocol {
+    /**
+     * Unspecified.
+     */
+    UNSPEC((short) 0),
+
+    /**
+     * Route installed by ICMP redirects.
+     */
+    REDIRECT((short) 1),
+
+    /**
+     * Route installed by kernel.
+     */
+    KERNEL((short) 2),
+
+    /**
+     * Route installed during boot.
+     */
+    BOOT((short) 3),
+
+    /**
+     * Route installed by administrator.
+     */
+    STATIC((short) 4),
+
+    /**
+     * GateD.
+     */
+    GATED((short) 8),
+
+    /**
+     * RDISC/ND router advertisements.
+     */
+    RA((short) 9),
+
+    /**
+     * Merit MRT.
+     */
+    MRT((short) 10),
+
+    /**
+     * Zebra.
+     */
+    ZEBRA((short) 11),
+
+    /**
+     * BIRD.
+     */
+    BIRD((short) 12),
+
+    /**
+     * DECnet routing daemon.
+     */
+    DNROUTED((short) 13),
+
+    /**
+     * XORP.
+     */
+    XORP((short) 14),
+
+    /**
+     * Netsukuku.
+     */
+    NTK((short) 15),
+
+    /**
+     * DHCP client.
+     */
+    DHCP((short) 16),
+
+    /**
+     * Multicast daemon.
+     */
+    MROUTED((short) 17),
+
+    /**
+     * Unknown.
+     */
+    UNKNOWN((short) 0);
+
+    private final short value;
+
+    /**
+     * Constructor.
+     *
+     * @param value value
+     */
+    RtProtocol(short value) {
+        this.value = value;
+    }
+
+    /**
+     * Returns the value.
+     *
+     * @return value
+     */
+    public short value() {
+        return value;
+    }
+
+    /**
+     * Gets the RtProtocol for the given integer value.
+     *
+     * @param value value
+     * @return RtProtocol, or null if unsupported type value
+     */
+    public static RtProtocol get(short value) {
+        for (RtProtocol p : RtProtocol.values()) {
+            if (p.value() == value) {
+                return p;
+            }
+        }
+        return UNKNOWN;
+    }
+}