*/
package org.opendaylight.protocol.bgp.parser.spi.pojo;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Iterables;
+import com.google.common.primitives.UnsignedBytes;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
+import org.opendaylight.protocol.bgp.concepts.util.NextHopUtil;
import org.opendaylight.protocol.bgp.parser.BGPParsingException;
import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
import org.opendaylight.protocol.bgp.parser.spi.AddressFamilyRegistry;
import org.opendaylight.protocol.bgp.parser.spi.NlriParser;
import org.opendaylight.protocol.bgp.parser.spi.NlriRegistry;
+import org.opendaylight.protocol.bgp.parser.spi.NlriSerializer;
import org.opendaylight.protocol.bgp.parser.spi.SubsequentAddressFamilyRegistry;
import org.opendaylight.protocol.concepts.AbstractRegistration;
import org.opendaylight.protocol.util.ByteArray;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.BgpTableType;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.update.path.attributes.MpReachNlri;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.update.path.attributes.MpReachNlriBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.update.path.attributes.MpUnreachNlri;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.update.path.attributes.MpUnreachNlriBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.path.attributes.MpReachNlri;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.path.attributes.MpReachNlriBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.path.attributes.MpUnreachNlri;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.path.attributes.MpUnreachNlriBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
-
-import com.google.common.base.Preconditions;
-import com.google.common.primitives.UnsignedBytes;
+import org.opendaylight.yangtools.yang.binding.DataObject;
final class SimpleNlriRegistry implements NlriRegistry {
- private final ConcurrentMap<BgpTableType, NlriParser> handlers = new ConcurrentHashMap<>();
- private final SubsequentAddressFamilyRegistry safiReg;
- private final AddressFamilyRegistry afiReg;
-
- public SimpleNlriRegistry(final AddressFamilyRegistry afiReg, final SubsequentAddressFamilyRegistry safiReg) {
- this.afiReg = Preconditions.checkNotNull(afiReg);
- this.safiReg = Preconditions.checkNotNull(safiReg);
- }
-
- private static BgpTableType createKey(final Class<? extends AddressFamily> afi,
- final Class<? extends SubsequentAddressFamily> safi) {
- Preconditions.checkNotNull(afi);
- Preconditions.checkNotNull(safi);
- return new BgpTableTypeImpl(afi, safi);
- }
-
- synchronized AutoCloseable registerNlriParser(final Class<? extends AddressFamily> afi,
- final Class<? extends SubsequentAddressFamily> safi, final NlriParser parser) {
- final BgpTableType key = createKey(afi, safi);
- final NlriParser prev = handlers.get(key);
- Preconditions.checkState(prev == null, "AFI/SAFI is already bound to parser " + prev);
-
- handlers.put(key, parser);
- final Object lock = this;
- return new AbstractRegistration() {
- @Override
- protected void removeRegistration() {
- synchronized (lock) {
- handlers.remove(key);
- }
- }
- };
- }
-
- private Class<? extends AddressFamily> getAfi(final byte[] header) throws BGPParsingException {
- final int afiVal = UnsignedBytes.toInt(header[0]) * 256 + UnsignedBytes.toInt(header[1]);
- final Class<? extends AddressFamily> afi = afiReg.classForFamily(afiVal);
- if (afi == null) {
- throw new BGPParsingException("Address Family Identifier: '" + afiVal + "' not supported.");
- }
-
- return afi;
- }
-
- private Class<? extends SubsequentAddressFamily> getSafi(final byte[] header) throws BGPParsingException {
- final int safiVal = UnsignedBytes.toInt(header[2]);
- final Class<? extends SubsequentAddressFamily> safi = safiReg.classForFamily(safiVal);
- if (safi == null) {
- throw new BGPParsingException("Subsequent Address Family Identifier: '" + safiVal + "' not supported.");
- }
-
- return safi;
- }
-
- @Override
- public MpUnreachNlri parseMpUnreach(final byte[] bytes) throws BGPParsingException {
- final MpUnreachNlriBuilder builder = new MpUnreachNlriBuilder();
- builder.setAfi(getAfi(bytes));
- builder.setSafi(getSafi(bytes));
-
- final NlriParser parser = handlers.get(createKey(builder.getAfi(), builder.getSafi()));
- parser.parseNlri(ByteArray.subByte(bytes, 3, bytes.length - 3), builder);
-
- return builder.build();
- }
-
- @Override
- public MpReachNlri parseMpReach(final byte[] bytes) throws BGPParsingException {
- final MpReachNlriBuilder builder = new MpReachNlriBuilder();
- builder.setAfi(getAfi(bytes));
- builder.setSafi(getSafi(bytes));
-
- final NlriParser parser = handlers.get(createKey(builder.getAfi(), builder.getSafi()));
-
- final int nextHopLength = UnsignedBytes.toInt(bytes[3]);
- int byteOffset = 4;
-
- final byte[] nextHop = ByteArray.subByte(bytes, byteOffset, nextHopLength);
- byteOffset += nextHopLength + 1;
-
- final byte[] nlri = ByteArray.subByte(bytes, byteOffset, bytes.length - byteOffset);
- parser.parseNlri(nlri, nextHop, builder);
-
- return builder.build();
- }
+
+ private static final int RESERVED = 1;
+
+ private final ConcurrentMap<BgpTableType, NlriParser> handlers = new ConcurrentHashMap<>();
+ private final ConcurrentMap<Class<? extends DataObject>, NlriSerializer> serializers = new ConcurrentHashMap<>();
+ private final SubsequentAddressFamilyRegistry safiReg;
+ private final AddressFamilyRegistry afiReg;
+
+ public SimpleNlriRegistry(final AddressFamilyRegistry afiReg, final SubsequentAddressFamilyRegistry safiReg) {
+ this.afiReg = Preconditions.checkNotNull(afiReg);
+ this.safiReg = Preconditions.checkNotNull(safiReg);
+ }
+
+ private static BgpTableType createKey(final Class<? extends AddressFamily> afi,
+ final Class<? extends SubsequentAddressFamily> safi) {
+ Preconditions.checkNotNull(afi);
+ Preconditions.checkNotNull(safi);
+ return new BgpTableTypeImpl(afi, safi);
+ }
+
+ synchronized AutoCloseable registerNlriSerializer(final Class<? extends DataObject> nlriClass, final NlriSerializer serializer){
+ final NlriParser prev = this.handlers.get(nlriClass);
+ Preconditions.checkState(prev == null, "Serializer already bound to class " + prev);
+
+ this.serializers.put(nlriClass, serializer);
+ final Object lock = this;
+ return new AbstractRegistration() {
+ @Override
+ protected void removeRegistration() {
+ synchronized (lock) {
+ SimpleNlriRegistry.this.serializers.remove(nlriClass);
+ }
+ }
+ };
+ }
+
+ synchronized AutoCloseable registerNlriParser(final Class<? extends AddressFamily> afi,
+ final Class<? extends SubsequentAddressFamily> safi, final NlriParser parser) {
+ final BgpTableType key = createKey(afi, safi);
+ final NlriParser prev = this.handlers.get(key);
+ Preconditions.checkState(prev == null, "AFI/SAFI is already bound to parser " + prev);
+
+ this.handlers.put(key, parser);
+ final Object lock = this;
+ return new AbstractRegistration() {
+ @Override
+ protected void removeRegistration() {
+ synchronized (lock) {
+ SimpleNlriRegistry.this.handlers.remove(key);
+ }
+ }
+ };
+ }
+
+ private Class<? extends AddressFamily> getAfi(final ByteBuf buffer) throws BGPParsingException {
+ final int afiVal = buffer.readUnsignedShort();
+ final Class<? extends AddressFamily> afi = this.afiReg.classForFamily(afiVal);
+ if (afi == null) {
+ throw new BGPParsingException("Address Family Identifier: '" + afiVal + "' not supported.");
+ }
+ return afi;
+ }
+
+ private Class<? extends SubsequentAddressFamily> getSafi(final ByteBuf buffer) throws BGPParsingException {
+ final int safiVal = UnsignedBytes.toInt(buffer.readByte());
+ final Class<? extends SubsequentAddressFamily> safi = this.safiReg.classForFamily(safiVal);
+ if (safi == null) {
+ throw new BGPParsingException("Subsequent Address Family Identifier: '" + safiVal + "' not supported.");
+ }
+ return safi;
+ }
+
+ @Override
+ public MpUnreachNlri parseMpUnreach(final ByteBuf buffer) throws BGPParsingException {
+ final MpUnreachNlriBuilder builder = new MpUnreachNlriBuilder();
+ builder.setAfi(getAfi(buffer));
+ builder.setSafi(getSafi(buffer));
+
+ final NlriParser parser = this.handlers.get(createKey(builder.getAfi(), builder.getSafi()));
+ final ByteBuf nlri = buffer.slice();
+ parser.parseNlri(nlri, builder);
+ return builder.build();
+ }
+
+ @Override
+ public void serializeMpReach(MpReachNlri mpReachNlri, ByteBuf byteAggregator) {
+
+ byteAggregator.writeShort(this.afiReg.numberForClass(mpReachNlri.getAfi()));
+ byteAggregator.writeByte(this.safiReg.numberForClass(mpReachNlri.getSafi()));
+
+ ByteBuf nextHopBuffer = Unpooled.buffer();
+ NextHopUtil.serializeNextHopSimple(mpReachNlri.getCNextHop(), nextHopBuffer);
+
+ byteAggregator.writeByte(nextHopBuffer.writerIndex());
+ byteAggregator.writeBytes(nextHopBuffer);
+ byteAggregator.writeZero(RESERVED);
+ }
+
+ @Override
+ public void serializeMpUnReach(MpUnreachNlri mpUnreachNlri, ByteBuf byteAggregator) {
+
+ byteAggregator.writeShort(this.afiReg.numberForClass(mpUnreachNlri.getAfi()));
+ byteAggregator.writeByte(this.safiReg.numberForClass(mpUnreachNlri.getSafi()));
+ }
+
+ @Override
+ public Iterable<NlriSerializer> getSerializers() {
+ return Iterables.unmodifiableIterable(this.serializers.values());
+ }
+
+ @Override
+ public MpReachNlri parseMpReach(final ByteBuf buffer) throws BGPParsingException {
+ final MpReachNlriBuilder builder = new MpReachNlriBuilder();
+ builder.setAfi(getAfi(buffer));
+ builder.setSafi(getSafi(buffer));
+
+ final NlriParser parser = this.handlers.get(createKey(builder.getAfi(), builder.getSafi()));
+
+ final int nextHopLength = UnsignedBytes.toInt(buffer.readByte());
+ final byte[] nextHop = ByteArray.readBytes(buffer, nextHopLength);
+ buffer.skipBytes(RESERVED);
+
+ final ByteBuf nlri = buffer.slice();
+ parser.parseNlri(nlri, nextHop, builder);
+ return builder.build();
+ }
}
Code Review / bgpcep.git / blobdiff