Bug 611 - serialization of path attributes

[bgpcep.git] / bgp / parser-impl / src / main / java / org / opendaylight / protocol / bgp / parser / impl / message / update / NextHopAttributeParser.java

diff --git a/bgp/parser-impl/src/main/java/org/opendaylight/protocol/bgp/parser/impl/message/update/NextHopAttributeParser.java b/bgp/parser-impl/src/main/java/org/opendaylight/protocol/bgp/parser/impl/message/update/NextHopAttributeParser.java
index 1b6b879109a331ec3b723198cb3f485e3fe4bf1a..506661eeffef9f64b0ce25c6c11b895f867cbce3 100644 (file)
--- a/bgp/parser-impl/src/main/java/org/opendaylight/protocol/bgp/parser/impl/message/update/NextHopAttributeParser.java
+++ b/bgp/parser-impl/src/main/java/org/opendaylight/protocol/bgp/parser/impl/message/update/NextHopAttributeParser.java
@@ -7,18 +7,63 @@
  */
 package org.opendaylight.protocol.bgp.parser.impl.message.update;
 
+import com.google.common.base.Preconditions;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.opendaylight.protocol.bgp.parser.AttributeFlags;
 import org.opendaylight.protocol.bgp.parser.spi.AttributeParser;
+import org.opendaylight.protocol.bgp.parser.spi.AttributeSerializer;
 import org.opendaylight.protocol.concepts.Ipv4Util;
+import org.opendaylight.protocol.concepts.Ipv6Util;
+import org.opendaylight.protocol.util.ByteArray;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.PathAttributes;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.update.PathAttributesBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.CNextHop;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.Ipv4NextHopCase;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.Ipv4NextHopCaseBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.Ipv6NextHopCase;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.ipv4.next.hop._case.Ipv4NextHopBuilder;
+import org.opendaylight.yangtools.yang.binding.DataObject;
 
-public final class NextHopAttributeParser implements AttributeParser {
-       public static final int TYPE = 3;
+public final class NextHopAttributeParser implements AttributeParser, AttributeSerializer {
 
-       @Override
-       public void parseAttribute(final byte[] bytes, final PathAttributesBuilder builder) {
-               builder.setCNextHop(new Ipv4NextHopCaseBuilder().setIpv4NextHop(
-                               new Ipv4NextHopBuilder().setGlobal(Ipv4Util.addressForBytes(bytes)).build()).build());
-       }
-}
\ No newline at end of file
+    public static final int TYPE = 3;
+
+    @Override
+    public void parseAttribute(final ByteBuf buffer, final PathAttributesBuilder builder) {
+        Preconditions.checkArgument(buffer.readableBytes() == Ipv4Util.IP4_LENGTH, "Length of byte array for NEXT_HOP should be %s, but is %s", buffer.readableBytes(), Ipv4Util.IP4_LENGTH);
+        builder.setCNextHop(new Ipv4NextHopCaseBuilder().setIpv4NextHop(
+                new Ipv4NextHopBuilder().setGlobal(Ipv4Util.addressForBytes(ByteArray.readAllBytes(buffer))).build()).build());
+    }
+
+    @Override
+    public void serializeAttribute(DataObject attribute, ByteBuf byteAggregator) {
+        PathAttributes pathAttributes = (PathAttributes) attribute;
+        CNextHop cNextHop = pathAttributes.getCNextHop();
+        if (cNextHop == null) {
+            return;
+        }
+        ByteBuf nextHopBuffer = Unpooled.buffer();
+        if (cNextHop instanceof Ipv4NextHopCase) {
+            byteAggregator.writeByte(AttributeFlags.TRANSITIVE);
+            byteAggregator.writeByte(TYPE);
+            Ipv4NextHopCase nextHop = (Ipv4NextHopCase) cNextHop;
+            nextHopBuffer.writeBytes(Ipv4Util.bytesForAddress(nextHop.getIpv4NextHop().getGlobal()));
+            byteAggregator.writeByte(nextHopBuffer.writerIndex());
+            byteAggregator.writeBytes(nextHopBuffer);
+        } else if (cNextHop instanceof Ipv6NextHopCase) {
+            byteAggregator.writeByte(AttributeFlags.TRANSITIVE);
+            byteAggregator.writeByte(TYPE);
+            Ipv6NextHopCase nextHop = (Ipv6NextHopCase) cNextHop;
+            if (nextHop.getIpv6NextHop().getGlobal() != null) {
+                nextHopBuffer.writeBytes(Ipv6Util.bytesForAddress(nextHop.getIpv6NextHop().getGlobal()));
+            }
+            if (nextHop.getIpv6NextHop().getLinkLocal() != null) {
+                nextHopBuffer.writeBytes(Ipv6Util.bytesForAddress(nextHop.getIpv6NextHop().getLinkLocal()));
+            }
+            byteAggregator.writeByte(nextHopBuffer.writerIndex());
+            byteAggregator.writeBytes(nextHopBuffer);
+        }
+
+    }
+}