package com.intelligt.modbus.jlibmodbus.net.transport;
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import com.intelligt.modbus.jlibmodbus.exception.ModbusIOException;
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import com.intelligt.modbus.jlibmodbus.exception.ModbusNumberException;
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import com.intelligt.modbus.jlibmodbus.msg.ModbusMessageFactory;
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import com.intelligt.modbus.jlibmodbus.msg.base.ModbusMessage;
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import com.intelligt.modbus.jlibmodbus.net.stream.InputStreamTCP;
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import com.intelligt.modbus.jlibmodbus.net.stream.OutputStreamTCP;
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import com.intelligt.modbus.jlibmodbus.net.stream.base.ModbusInputStream;
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import com.intelligt.modbus.jlibmodbus.net.stream.base.ModbusOutputStream;
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import com.intelligt.modbus.jlibmodbus.tcp.TcpAduHeader;
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import java.io.IOException;
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import java.net.Socket;
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/*
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* Copyright (C) 2016 "Invertor" Factory", JSC
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* [http://www.sbp-invertor.ru]
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*
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* This file is part of JLibModbus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Authors: Vladislav Y. Kochedykov, software engineer.
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* email: vladislav.kochedykov@gmail.com
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*/
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class ModbusTransportTCP extends ModbusTransport {
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final private Socket socket;
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ModbusTransportTCP(Socket socket) throws IOException {
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super(new InputStreamTCP(socket), new OutputStreamTCP(socket));
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this.socket = socket;
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}
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@Override
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protected ModbusMessage read(ModbusMessageFactory factory) throws ModbusNumberException, ModbusIOException {
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ModbusInputStream is = getInputStream();
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TcpAduHeader header = new TcpAduHeader();
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header.read(is);
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try {
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ModbusMessage msg = createMessage(factory);
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msg.setTransactionId(header.getTransactionId());
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msg.setProtocolId(header.getProtocolId());
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return msg;
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} catch (IOException e) {
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throw new ModbusIOException(e);
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}
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}
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@Override
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public void sendImpl(ModbusMessage msg) throws ModbusIOException {
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ModbusOutputStream os = getOutputStream();
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TcpAduHeader header = new TcpAduHeader();
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header.setProtocolId(msg.getProtocolId());
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header.setTransactionId(msg.getTransactionId());
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header.setPduSize(msg.size());
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header.write(os);
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msg.write(os);
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}
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@Override
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public void close() throws IOException {
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socket.close();
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}
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}
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