package com.zy.common.HslCommunication.Core.IMessage;
|
|
|
/**
|
* Modbus Tcp协议的消息对象，用来确定接收规则的
|
*/
|
public class ModbusTcpMessage implements INetMessage
|
{
|
|
/**
|
* 消息头的指令长度
|
*/
|
public int ProtocolHeadBytesLength(){
|
return 8;
|
}
|
|
|
/**
|
* 从当前的头子节文件中提取出接下来需要接收的数据长度
|
* @return 返回接下来的数据内容长度
|
*/
|
public int GetContentLengthByHeadBytes() {
|
if (HeadBytes == null) return 0;
|
if (HeadBytes.length >= ProtocolHeadBytesLength()) {
|
int length = (HeadBytes[4] & 0xff) * 256 + (HeadBytes[5] & 0xff);
|
if (length == 0) {
|
byte[] buffer = new byte[ProtocolHeadBytesLength() - 1];
|
for (int i = 0; i < buffer.length; i++) {
|
buffer[i] = HeadBytes[i + 1];
|
}
|
HeadBytes = buffer;
|
return (HeadBytes[5] & 0xff) * 256 + (HeadBytes[6] & 0xff) - 1;
|
} else {
|
return length - 2;
|
}
|
}
|
|
return 0;
|
}
|
|
|
/**
|
* 检查头子节的合法性
|
* @param token 特殊的令牌，有些特殊消息的验证
|
* @return 是否合法的验证
|
*/
|
public boolean CheckHeadBytesLegal(byte[] token)
|
{
|
if(HeadBytes == null) return false;
|
if(HeadBytes[2]==0x00 && HeadBytes[3] == 0x00){
|
return true;
|
}
|
else {
|
return false;
|
}
|
}
|
|
|
/**
|
* 获取头子节里的消息标识
|
* @return
|
*/
|
public int GetHeadBytesIdentity(){
|
|
return 0;
|
}
|
|
|
/**
|
* 获取消息头字节
|
*
|
* @return
|
*/
|
@Override
|
public byte[] getHeadBytes() {
|
return HeadBytes;
|
}
|
|
/**
|
* 获取消息内容字节
|
*
|
* @return
|
*/
|
@Override
|
public byte[] getContentBytes() {
|
return ContentBytes;
|
}
|
|
/**
|
* 获取发送的消息
|
*
|
* @return
|
*/
|
@Override
|
public byte[] getSendBytes() {
|
return SendBytes;
|
}
|
|
/**
|
* 设置消息头子节
|
* @param headBytes 字节数据
|
*/
|
public void setHeadBytes(byte[] headBytes){
|
HeadBytes = headBytes;
|
}
|
|
|
|
|
/**
|
* 设置消息内容字节
|
* @param contentBytes 内容字节
|
*/
|
public void setContentBytes(byte[] contentBytes){
|
ContentBytes = contentBytes;
|
}
|
|
|
|
/**
|
* 设置发送的字节信息
|
* @param sendBytes 发送的字节信息
|
*/
|
public void setSendBytes(byte[] sendBytes){
|
SendBytes = sendBytes;
|
}
|
|
|
private byte[] HeadBytes = null;
|
|
private byte[] ContentBytes = null;
|
|
private byte[] SendBytes = null;
|
}
|
