2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.protocol.bgp.parser.impl.message.open;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.Preconditions;
13 import com.google.common.collect.Lists;
14 import io.netty.buffer.ByteBuf;
15 import io.netty.buffer.ByteBufUtil;
16 import io.netty.buffer.Unpooled;
17 import java.util.Arrays;
18 import java.util.List;
19 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
20 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
21 import org.opendaylight.protocol.bgp.parser.spi.CapabilityRegistry;
22 import org.opendaylight.protocol.bgp.parser.spi.ParameterParser;
23 import org.opendaylight.protocol.bgp.parser.spi.ParameterSerializer;
24 import org.opendaylight.protocol.bgp.parser.spi.ParameterUtil;
25 import org.opendaylight.protocol.util.ByteArray;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.open.message.BgpParameters;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.open.message.BgpParametersBuilder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.open.message.bgp.parameters.OptionalCapabilities;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.open.message.bgp.parameters.OptionalCapabilitiesBuilder;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.open.message.bgp.parameters.optional.capabilities.CParameters;
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
35 * Parser for BGP Capability Parameter.
37 public final class CapabilityParameterParser implements ParameterParser, ParameterSerializer {
38 public static final int TYPE = 2;
40 private static final Logger LOG = LoggerFactory.getLogger(CapabilityParameterParser.class);
41 private final CapabilityRegistry reg;
43 public CapabilityParameterParser(final CapabilityRegistry reg) {
44 this.reg = requireNonNull(reg);
48 public BgpParameters parseParameter(final ByteBuf buffer) throws BGPParsingException, BGPDocumentedException {
49 Preconditions.checkArgument(buffer != null && buffer.readableBytes() != 0, "Byte array cannot be null or empty.");
51 if (LOG.isTraceEnabled()) {
52 LOG.trace("Started parsing of BGP Capabilities: {}", Arrays.toString(ByteArray.getAllBytes(buffer)));
55 final List<OptionalCapabilities> optionalCapas = Lists.newArrayList();
56 while (buffer.isReadable()) {
57 final OptionalCapabilities optionalCapa = parseOptionalCapability(buffer);
58 if (optionalCapa != null) {
59 optionalCapas.add(optionalCapa);
62 return new BgpParametersBuilder().setOptionalCapabilities(optionalCapas).build();
65 private OptionalCapabilities parseOptionalCapability(final ByteBuf buffer) throws BGPDocumentedException, BGPParsingException {
66 final int capCode = buffer.readUnsignedByte();
67 final int capLength = buffer.readUnsignedByte();
68 final ByteBuf paramBody = buffer.readSlice(capLength);
69 final CParameters ret = this.reg.parseCapability(capCode, paramBody);
71 LOG.info("Ignoring unsupported capability {}", capCode);
74 return new OptionalCapabilitiesBuilder().setCParameters(ret).build();
78 public void serializeParameter(final BgpParameters parameter, final ByteBuf byteAggregator) {
79 if (parameter.getOptionalCapabilities() != null) {
80 final ByteBuf buffer = Unpooled.buffer();
81 for (final OptionalCapabilities optionalCapa : parameter.getOptionalCapabilities()) {
82 LOG.trace("Started serializing BGP Capability: {}", optionalCapa);
83 serializeOptionalCapability(optionalCapa, buffer);
85 ParameterUtil.formatParameter(TYPE, buffer, byteAggregator);
89 private void serializeOptionalCapability(final OptionalCapabilities optionalCapa, final ByteBuf byteAggregator) {
90 if (optionalCapa.getCParameters() != null) {
91 final CParameters cap = optionalCapa.getCParameters();
92 final ByteBuf bytes = Unpooled.buffer();
93 this.reg.serializeCapability(cap, bytes);
94 Preconditions.checkArgument(bytes != null, "Unhandled capability class %s", cap.getImplementedInterface());
96 if (LOG.isTraceEnabled()) {
97 LOG.trace("BGP capability serialized to: {}", ByteBufUtil.hexDump(bytes));
99 byteAggregator.writeBytes(bytes);