Example usage for io.netty.buffer ByteBuf isReadable

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf isReadable.

Prototype

public abstract boolean isReadable();

Source Link

Document

Returns true if and only if (this.writerIndex - this.readerIndex) is greater than 0 .

Usage

From source file:org.opendaylight.protocol.bgp.parser.impl.message.BGPUpdateMessageParser.java

License:Open Source License

/**
 * Parse Update message from buffer./*  w  ww. j  a v  a2 s . co m*/
 * Calls {@link #checkMandatoryAttributesPresence(Update)} to check for presence of mandatory attributes.
 *
 * @param buffer Encoded BGP message in ByteBuf
 * @param messageLength Length of the BGP message
 * @param constraint Peer specific constraints
 * @return Parsed Update message body
 * @throws BGPDocumentedException
 */
@Override
public Update parseMessageBody(final ByteBuf buffer, final int messageLength,
        final PeerSpecificParserConstraint constraint) throws BGPDocumentedException {
    Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Buffer cannot be null or empty.");

    final UpdateBuilder builder = new UpdateBuilder();

    final int withdrawnRoutesLength = buffer.readUnsignedShort();
    if (withdrawnRoutesLength > 0) {
        // TODO handle NLRI with multiple paths - requires modified yang data model
        final List<Ipv4Prefix> withdrawnRoutes = Ipv4Util
                .prefixListForBytes(ByteArray.readBytes(buffer, withdrawnRoutesLength));
        builder.setWithdrawnRoutes(new WithdrawnRoutesBuilder().setWithdrawnRoutes(withdrawnRoutes).build());
    }
    final int totalPathAttrLength = buffer.readUnsignedShort();

    if (withdrawnRoutesLength == 0 && totalPathAttrLength == 0) {
        return builder.build();
    }
    if (totalPathAttrLength > 0) {
        try {
            final Attributes attributes = this.reg.parseAttributes(buffer.readSlice(totalPathAttrLength),
                    constraint);
            builder.setAttributes(attributes);
        } catch (final RuntimeException | BGPParsingException e) {
            // Catch everything else and turn it into a BGPDocumentedException
            throw new BGPDocumentedException("Could not parse BGP attributes.", BGPError.MALFORMED_ATTR_LIST,
                    e);
        }
    }
    final List<Ipv4Prefix> nlri = Ipv4Util.prefixListForBytes(ByteArray.readAllBytes(buffer));
    if (!nlri.isEmpty()) {
        // TODO handle NLRI with multiple paths - requires modified yang data model
        builder.setNlri(new NlriBuilder().setNlri(nlri).build());
    }
    final Update msg = builder.build();
    checkMandatoryAttributesPresence(msg);
    LOG.debug("BGP Update message was parsed {}.", msg);
    return msg;
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.open.AddPathCapabilityHandler.java

License:Open Source License

@Override
public CParameters parseCapability(final ByteBuf buffer) throws BGPDocumentedException, BGPParsingException {
    final List<AddressFamilies> families = new ArrayList<>();
    while (buffer.isReadable()) {
        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.");
        }//from  www  . j a  va2s  . co m
        final int safiVal = buffer.readUnsignedByte();
        final Class<? extends SubsequentAddressFamily> safi = this.safiReg.classForFamily(safiVal);
        if (safi == null) {
            throw new BGPParsingException(
                    "Subsequent Address Family Identifier: '" + safiVal + "' not supported.");
        }
        final SendReceive sendReceive = SendReceive.forValue(buffer.readUnsignedByte());
        if (sendReceive != null) {
            families.add(
                    new AddressFamiliesBuilder().setAfi(afi).setSafi(safi).setSendReceive(sendReceive).build());
        }
    }
    return new CParametersBuilder().addAugmentation(CParameters1.class, new CParameters1Builder()
            .setAddPathCapability(new AddPathCapabilityBuilder().setAddressFamilies(families).build()).build())
            .build();
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.open.CapabilityParameterParser.java

License:Open Source License

@Override
public BgpParameters parseParameter(final ByteBuf buffer) throws BGPParsingException, BGPDocumentedException {
    Preconditions.checkArgument(buffer != null && buffer.readableBytes() != 0,
            "Byte array cannot be null or empty.");

    if (LOG.isTraceEnabled()) {
        LOG.trace("Started parsing of BGP Capabilities: {}", Arrays.toString(ByteArray.getAllBytes(buffer)));
    }/*from   w  w w. j  av  a  2 s .c o  m*/

    final List<OptionalCapabilities> optionalCapas = Lists.newArrayList();
    while (buffer.isReadable()) {
        final OptionalCapabilities optionalCapa = parseOptionalCapability(buffer);
        if (optionalCapa != null) {
            optionalCapas.add(optionalCapa);
        }
    }
    return new BgpParametersBuilder().setOptionalCapabilities(optionalCapas).build();
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.update.AigpAttributeParser.java

License:Open Source License

@Override
public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder)
        throws BGPDocumentedException, BGPParsingException {
    if (!buffer.isReadable()) {
        return;/*from  w ww  .  j  a v  a 2s .co  m*/
    }
    builder.setAigp(new AigpBuilder().setAigpTlv(parseAigpTLV(buffer)).build());
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.update.AsPathAttributeParser.java

License:Open Source License

/**
 * Parses AS_PATH from bytes./*from  w w  w  .  ja  v  a 2 s .com*/
 *
 * @param refCache ReferenceCache shared reference of object
 * @param buffer bytes to be parsed
 * @return new ASPath object
 * @throws BGPDocumentedException if there is no AS_SEQUENCE present (mandatory)
 * @throws BGPParsingException
 */
private static AsPath parseAsPath(final ReferenceCache refCache, final ByteBuf buffer)
        throws BGPDocumentedException, BGPParsingException {
    if (!buffer.isReadable()) {
        return EMPTY;
    }
    final ArrayList<Segments> ases = new ArrayList<>();
    boolean isSequence = false;
    while (buffer.isReadable()) {
        final int type = buffer.readUnsignedByte();
        final SegmentType segmentType = AsPathSegmentParser.parseType(type);
        if (segmentType == null) {
            throw new BGPParsingException("AS Path segment type unknown : " + type);
        }
        final int count = buffer.readUnsignedByte();

        final List<AsNumber> asList = AsPathSegmentParser.parseAsSegment(refCache, count,
                buffer.readSlice(count * AsPathSegmentParser.AS_NUMBER_LENGTH));
        if (segmentType == SegmentType.AS_SEQUENCE) {
            ases.add(new SegmentsBuilder().setAsSequence(asList).build());
            isSequence = true;
        } else {
            ases.add(new SegmentsBuilder().setAsSet(asList).build());
        }
    }
    if (!isSequence) {
        throw new BGPDocumentedException("AS_SEQUENCE must be present in AS_PATH attribute.",
                BGPError.AS_PATH_MALFORMED);
    }

    ases.trimToSize();
    return new AsPathBuilder().setSegments(ases).build();
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.update.BgpPrefixSidAttributeParser.java

License:Open Source License

@Override
public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder)
        throws BGPDocumentedException, BGPParsingException {
    final BgpPrefixSidBuilder sid = new BgpPrefixSidBuilder();
    final List<BgpPrefixSidTlvs> tlvList = new ArrayList<BgpPrefixSidTlvs>();
    while (buffer.isReadable()) {
        final BgpPrefixSidTlv tlv = this.reg.parseBgpPrefixSidTlv(buffer.readUnsignedByte(), buffer);
        tlvList.add(new BgpPrefixSidTlvsBuilder().setBgpPrefixSidTlv(tlv).build());
    }/*from www  . j  av a2 s . c  o m*/
    builder.setBgpPrefixSid(sid.setBgpPrefixSidTlvs(tlvList).build());
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.update.ClusterIdAttributeParser.java

License:Open Source License

@Override
public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder) {
    final List<ClusterIdentifier> list = Lists.newArrayList();
    while (buffer.isReadable()) {
        list.add(new ClusterIdentifier(Ipv4Util.addressForByteBuf(buffer)));
    }/*from w w  w.  j  a  va  2  s.  c o  m*/
    builder.setClusterId(new ClusterIdBuilder().setCluster(list).build());
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.update.CommunitiesAttributeParser.java

License:Open Source License

@Override
public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder)
        throws BGPDocumentedException {
    final List<Communities> set = Lists.newArrayList();
    while (buffer.isReadable()) {
        set.add((Communities) parseCommunity(this.refCache, buffer.readSlice(COMMUNITY_LENGTH)));
    }// w ww  . ja  v  a  2s .  c o  m
    builder.setCommunities(set);
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.update.extended.communities.EncapsulationEC.java

License:Open Source License

@Override
public ExtendedCommunity parseExtendedCommunity(final ByteBuf buffer)
        throws BGPDocumentedException, BGPParsingException {
    Preconditions.checkArgument(buffer != null && buffer.isReadable(),
            "Array of bytes is mandatory. Can't be null or empty.");
    Preconditions.checkArgument(buffer.readableBytes() == CONTENT_SIZE,
            "Wrong length of array of bytes. Passed: " + buffer.readableBytes() + ".");
    buffer.skipBytes(RESERVED_SIZE);/*  w  ww .  j  a  v  a 2s .c o  m*/
    final EncapsulationExtendedCommunity encap = new EncapsulationExtendedCommunityBuilder()
            .setTunnelType(EncapsulationTunnelType.forValue(buffer.readUnsignedShort())).build();
    return new EncapsulationCaseBuilder().setEncapsulationExtendedCommunity(encap).build();
}

---

From source file:org.opendaylight.protocol.bgp.parser.impl.message.update.ExtendedCommunitiesAttributeParser.java

License:Open Source License

@Override
public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder)
        throws BGPDocumentedException, BGPParsingException {
    final List<ExtendedCommunities> set = new ArrayList<>();
    while (buffer.isReadable()) {
        final ExtendedCommunities exComm = ecReg.parseExtendedCommunity(buffer);
        if (exComm != null) {
            set.add(exComm);/* w  ww  . j a v a2s  .c  o m*/
        }
    }
    builder.setExtendedCommunities(set);
}

---

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