/*
* Copyright 2015 Kevin Herron
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.digitalpetri.opcua.stack.core.channel.messages;
import com.digitalpetri.opcua.stack.core.UaException;
import io.netty.buffer.ByteBuf;
public class TcpMessageDecoder {
public static HelloMessage decodeHello(ByteBuf buffer) throws UaException {
MessageType messageType = MessageType.fromMediumInt(buffer.readMedium());
char chunkType = (char) buffer.readByte();
buffer.skipBytes(4); // length
assert (messageType == MessageType.Hello && chunkType == 'F');
return HelloMessage.decode(buffer);
}
public static AcknowledgeMessage decodeAcknowledge(ByteBuf buffer) throws UaException {
MessageType messageType = MessageType.fromMediumInt(buffer.readMedium());
char chunkType = (char) buffer.readByte();
buffer.skipBytes(4); // length
assert (messageType == MessageType.Acknowledge && chunkType == 'F');
return AcknowledgeMessage.decode(buffer);
}
public static ErrorMessage decodeError(ByteBuf buffer) throws UaException {
MessageType messageType = MessageType.fromMediumInt(buffer.readMedium());
char chunkType = (char) buffer.readByte();
buffer.skipBytes(4); // length
assert (messageType == MessageType.Error && chunkType == 'F');
return ErrorMessage.decode(buffer);
}
}