Examples with ProtocolHandler org.apache.qpid.server.protocol.v1_0.codec.ProtocolHandler used on opensource projects

Example 1 with ProtocolHandler

use of org.apache.qpid.server.protocol.v1_0.codec.ProtocolHandler in project qpid-broker-j by apache.

the class FrameHandler method parse.

@Override
public ProtocolHandler parse(QpidByteBuffer in) {
    try {
        LOGGER.debug("RECV {} bytes", in.remaining());
        Error frameParsingError = null;
        int size;
        int remaining;
        List<ChannelFrameBody> channelFrameBodies = new ArrayList<>();
        while ((remaining = in.remaining()) >= 8 && frameParsingError == null) {
            size = in.getInt();
            if (size < 8) {
                frameParsingError = createFramingError("specified frame size %d smaller than minimum frame header size %d", size, 8);
                break;
            }
            if (size > _connectionHandler.getMaxFrameSize()) {
                frameParsingError = createFramingError("specified frame size %d larger than maximum frame header size %d", size, _connectionHandler.getMaxFrameSize());
                break;
            }
            if (remaining < size) {
                in.position(in.position() - 4);
                break;
            }
            int dataOffset = (in.get() << 2) & 0x3FF;
            if (dataOffset < 8) {
                frameParsingError = createFramingError("specified frame data offset %d smaller than minimum frame header size %d", dataOffset, 8);
                break;
            }
            if (dataOffset > size) {
                frameParsingError = createFramingError("specified frame data offset %d larger than the frame size %d", dataOffset, size);
                break;
            }
            byte type = in.get();
            switch(type) {
                case 0:
                    if (_isSasl) {
                        frameParsingError = createFramingError("received an AMQP frame type when expecting an SASL frame");
                    }
                    break;
                case 1:
                    if (!_isSasl) {
                        frameParsingError = createFramingError("received a SASL frame type when expecting an AMQP frame");
                    }
                    break;
                default:
                    frameParsingError = createFramingError("unknown frame type: %d", type);
            }
            if (frameParsingError != null) {
                break;
            }
            int channel = in.getUnsignedShort();
            if (dataOffset != 8) {
                in.position(in.position() + dataOffset - 8);
            }
            try (QpidByteBuffer dup = in.slice()) {
                dup.limit(size - dataOffset);
                in.position(in.position() + size - dataOffset);
                final boolean hasFrameBody = dup.hasRemaining();
                Object frameBody;
                if (hasFrameBody) {
                    frameBody = _valueHandler.parse(dup);
                    if (dup.hasRemaining()) {
                        if (frameBody instanceof Transfer) {
                            try (QpidByteBuffer payload = dup.slice()) {
                                ((Transfer) frameBody).setPayload(payload);
                            }
                        } else {
                            frameParsingError = createFramingError("Frame length %d larger than contained frame body %s.", size, frameBody);
                            break;
                        }
                    }
                } else {
                    frameBody = null;
                    if (_isSasl) {
                        frameParsingError = createFramingError("Empty (heartbeat) frames are not permitted during SASL negotiation");
                        break;
                    }
                }
                channelFrameBodies.add(new ChannelFrameBody() {

                    @Override
                    public int getChannel() {
                        return channel;
                    }

                    @Override
                    public Object getFrameBody() {
                        return frameBody;
                    }
                });
                if (_isSasl) {
                    break;
                }
            } catch (AmqpErrorException ex) {
                frameParsingError = ex.getError();
            }
        }
        if (frameParsingError != null) {
            _connectionHandler.handleError(frameParsingError);
            _errored = true;
        } else {
            _connectionHandler.receive(channelFrameBodies);
        }
    } catch (RuntimeException e) {
        if (e instanceof ServerScopedRuntimeException) {
            throw e;
        }
        LOGGER.warn("Unexpected exception handling frame", e);
        // This exception is unexpected. The up layer should handle error condition gracefully
        _connectionHandler.handleError(this.createError(AmqpError.INTERNAL_ERROR, e.toString()));
    }
    return this;
}