BUG 2230: RSVP RRO Subobjects

[bgpcep.git] / rsvp / impl / src / main / java / org / opendaylight / protocol / rsvp / parser / impl / subobject / rro / RROIpv6PrefixSubobjectParser.java

diff --git a/rsvp/impl/src/main/java/org/opendaylight/protocol/rsvp/parser/impl/subobject/rro/RROIpv6PrefixSubobjectParser.java b/rsvp/impl/src/main/java/org/opendaylight/protocol/rsvp/parser/impl/subobject/rro/RROIpv6PrefixSubobjectParser.java
new file mode 100644 (file)
index 0000000..c83b3b1
--- /dev/null
+++ b/rsvp/impl/src/main/java/org/opendaylight/protocol/rsvp/parser/impl/subobject/rro/RROIpv6PrefixSubobjectParser.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.protocol.rsvp.parser.impl.subobject.rro;
+
+import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeIpv6Prefix;
+
+import com.google.common.base.Preconditions;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.opendaylight.protocol.rsvp.parser.spi.RROSubobjectParser;
+import org.opendaylight.protocol.rsvp.parser.spi.RROSubobjectSerializer;
+import org.opendaylight.protocol.rsvp.parser.spi.RSVPParsingException;
+import org.opendaylight.protocol.util.BitArray;
+import org.opendaylight.protocol.util.ByteArray;
+import org.opendaylight.protocol.util.Ipv6Util;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.IpPrefixSubobject;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.list.SubobjectContainer;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.list.SubobjectContainerBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.subobject.type.IpPrefixCase;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.subobject.type.IpPrefixCaseBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.subobject.type.ip.prefix._case.IpPrefixBuilder;
+
+/**
+ * Parser for {@link IpPrefixCase}
+ */
+public class RROIpv6PrefixSubobjectParser implements RROSubobjectParser, RROSubobjectSerializer {
+
+    public static final int TYPE = 2;
+
+    private static final int PREFIX_F_LENGTH = 1;
+    private static final int FLAGS_SIZE = 8;
+
+    private static final int PREFIX_F_OFFSET = Ipv6Util.IPV6_LENGTH;
+
+    private static final int CONTENT_LENGTH = Ipv6Util.IPV6_LENGTH + PREFIX_F_LENGTH + FLAGS_SIZE / Byte.SIZE;
+
+    private static final int LPA_F_OFFSET = 7;
+    private static final int LPIU_F_OFFSET = 6;
+
+    @Override
+    public SubobjectContainer parseSubobject(final ByteBuf buffer) throws RSVPParsingException {
+        Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
+        final SubobjectContainerBuilder builder = new SubobjectContainerBuilder();
+        if (buffer.readableBytes() != CONTENT_LENGTH) {
+            throw new RSVPParsingException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + ";");
+        }
+        final int length = buffer.getUnsignedByte(PREFIX_F_OFFSET);
+        final IpPrefixBuilder prefix = new IpPrefixBuilder().setIpPrefix(new IpPrefix(Ipv6Util.prefixForBytes(ByteArray.readBytes(buffer,
+            Ipv6Util.IPV6_LENGTH), length)));
+        buffer.skipBytes(PREFIX_F_LENGTH);
+        final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
+        builder.setProtectionAvailable(flags.get(LPA_F_OFFSET));
+        builder.setProtectionInUse(flags.get(LPIU_F_OFFSET));
+        builder.setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(prefix.build()).build());
+        return builder.build();
+    }
+
+    @Override
+    public void serializeSubobject(final SubobjectContainer subobject, final ByteBuf buffer) {
+        Preconditions.checkArgument(subobject.getSubobjectType() instanceof IpPrefixCase, "Unknown subobject instance. Passed %s. Needed IpPrefixCase.", subobject.getSubobjectType().getClass());
+        final IpPrefixSubobject specObj = ((IpPrefixCase) subobject.getSubobjectType()).getIpPrefix();
+        final IpPrefix prefix = specObj.getIpPrefix();
+        final BitArray flags = new BitArray(FLAGS_SIZE);
+        flags.set(LPA_F_OFFSET, subobject.isProtectionAvailable());
+        flags.set(LPIU_F_OFFSET, subobject.isProtectionInUse());
+        final ByteBuf body = Unpooled.buffer(CONTENT_LENGTH);
+        Preconditions.checkArgument(prefix.getIpv6Prefix() != null, "Ipv6Prefix is mandatory.");
+        writeIpv6Prefix(prefix.getIpv6Prefix(), body);
+        flags.toByteBuf(body);
+        RROSubobjectUtil.formatSubobject(TYPE, body, buffer);
+    }
+}