Examples with EncodingLimits org.eclipse.milo.opcua.stack.core.channel.EncodingLimits used on opensource projects

Example 1 with EncodingLimits

use of org.eclipse.milo.opcua.stack.core.channel.EncodingLimits in project milo by eclipse.

the class UascClientAcknowledgeHandler method onAcknowledge.

private void onAcknowledge(ChannelHandlerContext ctx, ByteBuf buffer) {
    if (helloTimeout != null && !helloTimeout.cancel()) {
        helloTimeout = null;
        handshakeFuture.completeExceptionally(new UaException(StatusCodes.Bad_Timeout, "timed out waiting for acknowledge"));
        ctx.close();
        return;
    }
    logger.debug("Received Acknowledge message on channel={}.", ctx.channel());
    // Skip messageType, chunkType, and messageSize
    buffer.skipBytes(3 + 1 + 4);
    AcknowledgeMessage acknowledge = AcknowledgeMessage.decode(buffer);
    long remoteProtocolVersion = acknowledge.getProtocolVersion();
    long remoteReceiveBufferSize = acknowledge.getReceiveBufferSize();
    long remoteSendBufferSize = acknowledge.getSendBufferSize();
    long remoteMaxMessageSize = acknowledge.getMaxMessageSize();
    long remoteMaxChunkCount = acknowledge.getMaxChunkCount();
    if (PROTOCOL_VERSION > remoteProtocolVersion) {
        logger.warn("Client protocol version ({}) does not match server protocol version ({}).", PROTOCOL_VERSION, remoteProtocolVersion);
    }
    EncodingLimits encodingLimits = config.getEncodingLimits();
    /* Our receive buffer size is determined by the remote send buffer size. */
    long localReceiveBufferSize = Math.min(remoteSendBufferSize, encodingLimits.getMaxChunkSize());
    /* Our send buffer size is determined by the remote receive buffer size. */
    long localSendBufferSize = Math.min(remoteReceiveBufferSize, encodingLimits.getMaxChunkSize());
    /* Max message size the remote can send us; not influenced by remote configuration. */
    long localMaxMessageSize = encodingLimits.getMaxMessageSize();
    /* Max chunk count the remote can send us; not influenced by remote configuration. */
    long localMaxChunkCount = encodingLimits.getMaxChunkCount();
    ChannelParameters parameters = new ChannelParameters(Ints.saturatedCast(localMaxMessageSize), Ints.saturatedCast(localReceiveBufferSize), Ints.saturatedCast(localSendBufferSize), Ints.saturatedCast(localMaxChunkCount), Ints.saturatedCast(remoteMaxMessageSize), Ints.saturatedCast(remoteReceiveBufferSize), Ints.saturatedCast(remoteSendBufferSize), Ints.saturatedCast(remoteMaxChunkCount));
    ctx.channel().attr(KEY_AWAITING_HANDSHAKE).set(awaitingHandshake);
    ctx.executor().execute(() -> {
        SerializationQueue serializationQueue = new SerializationQueue(config.getExecutor(), parameters, client.getStaticSerializationContext());
        UascClientMessageHandler handler = new UascClientMessageHandler(config, secureChannel, serializationQueue, handshakeFuture);
        ctx.pipeline().addLast(handler);
    });
}

Example 2 with EncodingLimits

use of org.eclipse.milo.opcua.stack.core.channel.EncodingLimits in project milo by eclipse.

the class UascServerHelloHandler method onHello.

private void onHello(ChannelHandlerContext ctx, ByteBuf buffer) throws UaException {
    logger.debug("[remote={}] Received Hello message.", ctx.channel().remoteAddress());
    receivedHello = true;
    final HelloMessage hello = TcpMessageDecoder.decodeHello(buffer);
    String endpointUrl = hello.getEndpointUrl();
    boolean endpointMatch = endpointUrl != null && stackServer.getEndpointDescriptions().stream().anyMatch(endpoint -> Objects.equals(EndpointUtil.getPath(endpointUrl), EndpointUtil.getPath(endpoint.getEndpointUrl())));
    if (!endpointMatch) {
        throw new UaException(StatusCodes.Bad_TcpEndpointUrlInvalid, "unrecognized endpoint url: " + endpointUrl);
    }
    ctx.channel().attr(ENDPOINT_URL_KEY).set(endpointUrl);
    long remoteProtocolVersion = hello.getProtocolVersion();
    long remoteReceiveBufferSize = hello.getReceiveBufferSize();
    long remoteSendBufferSize = hello.getSendBufferSize();
    long remoteMaxMessageSize = hello.getMaxMessageSize();
    long remoteMaxChunkCount = hello.getMaxChunkCount();
    if (remoteProtocolVersion < PROTOCOL_VERSION) {
        throw new UaException(StatusCodes.Bad_ProtocolVersionUnsupported, "unsupported protocol version: " + remoteProtocolVersion);
    }
    EncodingLimits config = stackServer.getConfig().getEncodingLimits();
    /* Our receive buffer size is determined by the remote send buffer size. */
    long localReceiveBufferSize = Math.min(remoteSendBufferSize, config.getMaxChunkSize());
    /* Our send buffer size is determined by the remote receive buffer size. */
    long localSendBufferSize = Math.min(remoteReceiveBufferSize, config.getMaxChunkSize());
    /* Max chunk count the remote can send us; not influenced by remote configuration. */
    long localMaxChunkCount = config.getMaxChunkCount();
    /* Max message size the remote can send us. Determined by our max chunk count and receive buffer size. */
    long localMaxMessageSize = Math.min(localReceiveBufferSize * localMaxChunkCount, config.getMaxMessageSize());
    ChannelParameters parameters = new ChannelParameters(Ints.saturatedCast(localMaxMessageSize), Ints.saturatedCast(localReceiveBufferSize), Ints.saturatedCast(localSendBufferSize), Ints.saturatedCast(localMaxChunkCount), Ints.saturatedCast(remoteMaxMessageSize), Ints.saturatedCast(remoteReceiveBufferSize), Ints.saturatedCast(remoteSendBufferSize), Ints.saturatedCast(remoteMaxChunkCount));
    SerializationQueue serializationQueue = new SerializationQueue(stackServer.getConfig().getExecutor(), parameters, stackServer.getSerializationContext());
    ctx.pipeline().addLast(new UascServerAsymmetricHandler(stackServer, transportProfile, serializationQueue));
    ctx.pipeline().remove(this);
    logger.debug("[remote={}] Removed HelloHandler, added AsymmetricHandler.", ctx.channel().remoteAddress());
    AcknowledgeMessage acknowledge = new AcknowledgeMessage(PROTOCOL_VERSION, localReceiveBufferSize, localSendBufferSize, localMaxMessageSize, localMaxChunkCount);
    ByteBuf messageBuffer = TcpMessageEncoder.encode(acknowledge);
    // Using ctx.executor() is necessary to ensure this handler is removed
    // before the message can be written and another response arrives.
    ctx.executor().execute(() -> ctx.writeAndFlush(messageBuffer));
    logger.debug("[remote={}] Sent Acknowledge message.", ctx.channel().remoteAddress());
}