Example usage for io.netty.buffer ByteBuf readUnsignedInt

Introduction

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

Prototype

public abstract long readUnsignedInt();

Source Link

Document

Gets an unsigned 32-bit integer at the current readerIndex and increases the readerIndex by 4 in this buffer.

Usage

From source file:io.netlibs.bgp.netty.codec.OpenPacketDecoder.java

License:Apache License

/**
 * decode the OPEN network packet. The passed channel buffer MUST point to the first packet octet AFTER the packet type and the buffer
 * must be at least 9 octets large at this point.
 *
 * @param buffer//from   w  ww.  j  a va2  s .  c  om
 *          the buffer containing the data.
 * @return
 */

public OpenPacket decodeOpenPacket(final ByteBuf buffer) {

    OpenPacketBuilder b = OpenPacket.builder();

    ProtocolPacketUtils.verifyPacketSize(buffer, BGPv4Constants.BGP_PACKET_MIN_SIZE_OPEN, -1);

    short version = buffer.readUnsignedByte();

    if (version != BGPv4Constants.BGP_VERSION) {
        throw new UnsupportedVersionNumberException(BGPv4Constants.BGP_VERSION);
    }

    b.protocolVersion(version);
    b.autonomousSystem(buffer.readUnsignedShort());
    b.holdTime(buffer.readUnsignedShort());

    long identifier = buffer.readUnsignedInt();

    if ((identifier & IPV4_MULTICAST_MASK) == IPV4_MULTICAST_MASK) {
        throw new BadBgpIdentifierException();
    }

    b.bgpIdentifier(identifier);

    final int parameterLength = buffer.readUnsignedByte();

    if (parameterLength > 0) {

        while (buffer.isReadable()) {

            final int parameterType = buffer.readUnsignedByte();
            final int paramLength = buffer.readUnsignedByte();

            final ByteBuf valueBuffer = Unpooled.buffer(paramLength);

            buffer.readBytes(valueBuffer);

            switch (parameterType) {

            case BGPv4Constants.BGP_OPEN_PARAMETER_TYPE_AUTH:
                log.warn("Ignoring auth parameter");
                // RFC 4271 says auth is deprecated.
                break;

            case BGPv4Constants.BGP_OPEN_PARAMETER_TYPE_CAPABILITY:
                b.capabilities(CapabilityCodec.decodeCapabilities(valueBuffer));
                break;

            default:
                throw new UnsupportedOptionalParameterException();

            }

        }

    }

    return b.build();

}

From source file:io.netlibs.bgp.netty.codec.RouteRefreshPacketDecoder.java

License:Apache License

private ORFEntry decodeAddressPrefixBasedORFEntry(ByteBuf buffer, ORFAction action, ORFMatch match) {

    AddressPrefixBasedORFEntry entry = new AddressPrefixBasedORFEntry(action, match);

    if (action != ORFAction.REMOVE_ALL) {
        entry.setSequence((int) buffer.readUnsignedInt());
        entry.setMinLength(buffer.readUnsignedByte());
        entry.setMaxLength(buffer.readUnsignedByte());
        entry.setPrefix(NLRICodec.decodeNLRI(buffer));
    }// w  w  w  .  j  a  v  a  2  s .  c  o  m

    return entry;

}

From source file:io.netlibs.bgp.netty.codec.UpdatePacketDecoder.java

License:Apache License

private ASPathAttribute decodeASPathAttribute(final ByteBuf buffer, final ASType asType) {
    final ASPathAttribute attr = new ASPathAttribute(asType);

    while (buffer.isReadable()) {
        if (buffer.readableBytes() < 2) {
            throw new MalformedASPathAttributeException();
        }/*from w  ww  .  ja v a  2  s .c om*/

        final int segmentType = buffer.readUnsignedByte();
        final int pathLength = buffer.readUnsignedByte();
        final int pathOctetLength = (pathLength * (asType == ASType.AS_NUMBER_4OCTETS ? 4 : 2));

        if (buffer.readableBytes() < pathOctetLength) {
            throw new MalformedASPathAttributeException();
        }

        final PathSegment segment = new PathSegment(asType);

        try {
            segment.setPathSegmentType(PathSegmentTypeCodec.fromCode(segmentType));
        } catch (final IllegalArgumentException e) {
            throw new MalformedASPathAttributeException();
        }

        for (int i = 0; i < pathLength; i++) {
            if (asType == ASType.AS_NUMBER_4OCTETS) {
                segment.getAses().add((int) buffer.readUnsignedInt());
            } else {
                segment.getAses().add(buffer.readUnsignedShort());
            }
        }

        attr.getPathSegments().add(segment);
    }

    return attr;
}

From source file:io.netlibs.bgp.netty.codec.UpdatePacketDecoder.java

License:Apache License

private MultiExitDiscPathAttribute decodeMultiExitDiscPathAttribute(final ByteBuf buffer) {
    final MultiExitDiscPathAttribute attr = new MultiExitDiscPathAttribute();

    if (buffer.readableBytes() != 4) {
        throw new AttributeLengthException();
    }//from w w  w  .j a va  2  s  . c o m

    attr.setDiscriminator((int) buffer.readUnsignedInt());

    return attr;
}

From source file:io.netlibs.bgp.netty.codec.UpdatePacketDecoder.java

License:Apache License

private LocalPrefPathAttribute decodeLocalPrefPathAttribute(final ByteBuf buffer) {
    final LocalPrefPathAttribute attr = new LocalPrefPathAttribute();

    if (buffer.readableBytes() != 4) {
        throw new AttributeLengthException();
    }/*ww  w  . ja va 2 s  .c  o  m*/

    attr.setLocalPreference((int) buffer.readUnsignedInt());

    return attr;
}

From source file:io.netlibs.bgp.netty.codec.UpdatePacketDecoder.java

License:Apache License

private AggregatorPathAttribute decodeAggregatorPathAttribute(final ByteBuf buffer, final ASType asType) {
    final AggregatorPathAttribute attr = new AggregatorPathAttribute(asType);

    if (buffer.readableBytes() != PathAttributeCodec.valueLength(attr)) {
        throw new AttributeLengthException();
    }//from   w  ww. jav  a  2 s  . c o m

    if (asType == ASType.AS_NUMBER_4OCTETS) {
        attr.setAsNumber((int) buffer.readUnsignedInt());
    } else {
        attr.setAsNumber(buffer.readUnsignedShort());
    }

    try {
        final byte[] addr = new byte[4];

        buffer.readBytes(addr);
        attr.setAggregator((Inet4Address) InetAddress.getByAddress(addr));
    } catch (final UnknownHostException e) {
        throw new OptionalAttributeErrorException();
    }

    return attr;
}

From source file:io.netlibs.bgp.netty.codec.UpdatePacketDecoder.java

License:Apache License

private OriginatorIDPathAttribute decodeOriginatorIDPathAttribute(final ByteBuf buffer) {
    final OriginatorIDPathAttribute attr = new OriginatorIDPathAttribute();

    try {//from  w  w  w  . j  ava2  s. com
        attr.setOriginatorID((int) buffer.readUnsignedInt());
    } catch (final RuntimeException e) {
        throw new OptionalAttributeErrorException();
    }

    return attr;
}

From source file:io.netlibs.bgp.netty.codec.UpdatePacketDecoder.java

License:Apache License

private ClusterListPathAttribute decodeClusterListPathAttribute(final ByteBuf buffer) {
    final ClusterListPathAttribute attr = new ClusterListPathAttribute();

    try {/*from  w w  w  .  j  a v  a  2  s. c om*/
        while (buffer.isReadable()) {
            attr.getClusterIds().add((int) buffer.readUnsignedInt());
        }
    } catch (final RuntimeException e) {
        throw new OptionalAttributeErrorException();
    }
    return attr;
}

From source file:io.netlibs.bgp.netty.protocol.open.CapabilityCodec.java

License:Apache License

private static Capability decodeAutonomousSystem4Capability(final ByteBuf buffer) {
    final AutonomousSystem4Capability cap = new AutonomousSystem4Capability();

    assertFixedLength(buffer, BGPv4Constants.BGP_CAPABILITY_LENGTH_AS4_NUMBERS);
    cap.setAutonomousSystem((int) buffer.readUnsignedInt());

    return cap;// www .j  a v a  2 s.c om
}

From source file:me.melchor9000.net.resolver.DNSResourceRecord.java

License:Open Source License

@Override
public void fromByteBuf(@NotNull ByteBuf buffer) throws DataNotRepresentsObject {
    name = readName(buffer);//  w w  w  .j  a v a  2s  . c o  m
    type = rs(buffer);
    nclass = rs(buffer);
    if (buffer.readableBytes() >= 4)
        ttl = buffer.readUnsignedInt();
    else
        throw new DataNotRepresentsObject("Incomplete", buffer);
    data = DNSResourceData.forData(type, buffer);
}