BUG-130 : split RRO IpPrefix parser.

[bgpcep.git] / pcep / impl / src / main / java / org / opendaylight / protocol / pcep / impl / subobject / RROIpv6PrefixSubobjectParser.java

diff --git a/pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/RROIpv6PrefixSubobjectParser.java b/pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/RROIpv6PrefixSubobjectParser.java
new file mode 100644 (file)
index 0000000..8a130ac
--- /dev/null
+++ b/pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/RROIpv6PrefixSubobjectParser.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2013 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.pcep.impl.subobject;
+
+import java.util.Arrays;
+import java.util.BitSet;
+
+import org.opendaylight.protocol.concepts.Ipv4Util;
+import org.opendaylight.protocol.concepts.Ipv6Util;
+import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
+import org.opendaylight.protocol.pcep.spi.RROSubobjectParser;
+import org.opendaylight.protocol.pcep.spi.RROSubobjectSerializer;
+import org.opendaylight.protocol.util.ByteArray;
+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.pcep.types.rev131005.reported.route.object.rro.Subobjects;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.rro.SubobjectsBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.IpPrefixSubobject;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.IpPrefixCase;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.IpPrefixCaseBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.ip.prefix._case.IpPrefixBuilder;
+
+import com.google.common.primitives.UnsignedBytes;
+
+/**
+ * Parser for {@link IpPrefixCase}
+ */
+public class RROIpv6PrefixSubobjectParser implements RROSubobjectParser, RROSubobjectSerializer {
+
+       public static final int TYPE = 2;
+
+       private static final int IP_F_LENGTH = 16;
+
+       private static final int PREFIX_F_LENGTH = 1;
+       private static final int FLAGS_F_LENGTH = 1;
+
+       private static final int IP_F_OFFSET = 0;
+
+       private static final int PREFIX_F_OFFSET = IP_F_OFFSET + IP_F_LENGTH;
+       private static final int FLAGS_F_OFFSET = PREFIX_F_OFFSET + PREFIX_F_LENGTH;
+
+       private static final int CONTENT_LENGTH = IP_F_LENGTH + PREFIX_F_LENGTH + FLAGS_F_LENGTH;
+
+       private static final int LPA_F_OFFSET = 7;
+       private static final int LPIU_F_OFFSET = 6;
+
+       @Override
+       public Subobjects parseSubobject(final byte[] buffer) throws PCEPDeserializerException {
+               if (buffer == null || buffer.length == 0) {
+                       throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
+               }
+               final SubobjectsBuilder builder = new SubobjectsBuilder();
+               if (buffer.length != CONTENT_LENGTH) {
+                       throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + ";");
+               }
+               final int length = UnsignedBytes.toInt(buffer[PREFIX_F_OFFSET]);
+               final BitSet flags = ByteArray.bytesToBitSet(Arrays.copyOfRange(buffer, FLAGS_F_OFFSET, FLAGS_F_OFFSET + FLAGS_F_LENGTH));
+               builder.setProtectionAvailable(flags.get(LPA_F_OFFSET));
+               builder.setProtectionInUse(flags.get(LPIU_F_OFFSET));
+               builder.setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(
+                               new IpPrefixBuilder().setIpPrefix(
+                                               new IpPrefix(Ipv6Util.prefixForBytes(ByteArray.subByte(buffer, IP_F_OFFSET, IP_F_LENGTH), length))).build()).build());
+               return builder.build();
+       }
+
+       @Override
+       public byte[] serializeSubobject(final Subobjects subobject) {
+               if (!(subobject.getSubobjectType() instanceof IpPrefixCase)) {
+                       throw new IllegalArgumentException("Unknown ReportedRouteSubobject instance. Passed " + subobject.getClass()
+                                       + ". Needed IpPrefixCase.");
+               }
+               final IpPrefixSubobject specObj = ((IpPrefixCase) subobject.getSubobjectType()).getIpPrefix();
+               final IpPrefix prefix = specObj.getIpPrefix();
+               final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
+               flags.set(LPA_F_OFFSET, subobject.isProtectionAvailable());
+               flags.set(LPIU_F_OFFSET, subobject.isProtectionInUse());
+               final byte[] retBytes = new byte[CONTENT_LENGTH];
+               ByteArray.copyWhole(Ipv6Util.bytesForPrefix(prefix.getIpv6Prefix()), retBytes, IP_F_OFFSET);
+               retBytes[PREFIX_F_OFFSET] = UnsignedBytes.checkedCast(Ipv4Util.getPrefixLength(prefix));
+               ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
+               return retBytes;
+       }
+
+       @Override
+       public int getType() {
+               return TYPE;
+       }
+}