/// <summary>
/// 获取消息报文对象列表。
/// </summary>
/// <param name="dataArray">消息报文字节数组。</param>
/// <param name="desKey">
/// DES 密钥，默认不加密。
/// <para>该密钥运算模式采用 ECB 模式。</para>
/// </param>
/// <param name="isTcpOrUdp">报文承载方式是否是TCP或UDP，默认为false。</param>
/// <param name="isCheckCrc">是否校验CRC。</param>
/// <returns>消息报文对象列表。</returns>
internal static List <Datagram> GetDatagramList(byte[] dataArray, byte[] desKey = null, bool isTcpOrUdp = false, bool isCheckCrc = true)
{
List <byte> dataList = new List <byte>(dataArray);
for (int i = dataArray.Length - 1; i >= 0; i--)
{
if (dataList[i] > 0)
{
break;
}
dataList.RemoveAt(i);
}
if (dataList.Count < 15)
{
foreach (var item in dataList)
{
if (item == 0xFF)
{
return(new List <Datagram>()
{
new Datagram
(
new MessageHead(MessageType.HeartbeatData)
)
});
}
if (item == 0xFE)
{
return(new List <Datagram>()
{
new Datagram
(
new MessageHead(MessageType.HeartbeatResponse)
)
});
}
}
throw new CsaException("消息解析错误。", ErrorCode.MessageParseError);
}
List <Datagram> datagramList = new List <Datagram>();
List <byte[]> newByteArrayList;
if (!isTcpOrUdp)
{
List <byte[]> byteArrayList = new List <byte[]>();
GetByteArrayList(dataList.ToArray(), 0, ref byteArrayList);
newByteArrayList = Descaping(byteArrayList);
}
else
{
newByteArrayList = new List <byte[]> {
dataList.ToArray()
};
}
foreach (var tempByteArray in newByteArrayList)
{
if (tempByteArray.Length > 15)
{
if (!Enum.IsDefined(typeof(MessageType), tempByteArray[0]))
{
throw new CsaException("参数类型未定义。", ErrorCode.ParameterTypeUndefined);
}
Datagram d = new Datagram();
MessageHead mh = new MessageHead();
mh.Type = (MessageType)tempByteArray[0];
mh.SeqNumber = (uint)((tempByteArray[1] << 24) + (tempByteArray[2] << 16) + (tempByteArray[3] << 8) + tempByteArray[4]);
mh.Length = (ushort)((tempByteArray[5] << 8) + tempByteArray[6]);
mh.Reserved = (ulong)((tempByteArray[7] << 32) + (tempByteArray[8] << 24) + (tempByteArray[9] << 16) + (tempByteArray[10] << 8) + tempByteArray[11]);
mh.Crc32 = (uint)((tempByteArray[12] << 24) + (tempByteArray[13] << 16) + (tempByteArray[14] << 8) + tempByteArray[15]);
if (mh.Type == MessageType.Command ||
mh.Type == MessageType.Event ||
mh.Type == MessageType.CommandResult)
{
byte[] newByteArray = tempByteArray.Where((b, index) => index >= 16 && index < 16 + mh.Length).ToArray();
byte[] msgBody;
if (desKey?.Length == 8)
{
DESHelper des = new DESHelper();
msgBody = des.Decrypt(desKey, newByteArray);
// 设置一个值指示采用 DES 密钥加密。
d.IsCryptographic = true;
}
else
{
msgBody = newByteArray;
}
if (msgBody.Length >= 10)
{
if (!Enum.IsDefined(typeof(MessageId), (ushort)((msgBody[0] << 8) + msgBody[1])))
{
throw new CsaException("消息ID未定义。", ErrorCode.MessageIdUndefined);
}
MessageBody mb = new MessageBody();
mb.MessageId = (MessageId)((msgBody[0] << 8) + msgBody[1]);
mb.GatewayId = ((uint)msgBody[2] << 24) + ((uint)msgBody[3] << 16) + ((uint)msgBody[4] << 8) + msgBody[5];
mb.LuminaireId = ((uint)msgBody[6] << 24) + ((uint)msgBody[7] << 16) + ((uint)msgBody[8] << 8) + msgBody[9];
if (mh.Type == MessageType.CommandResult)
{
mb.ErrorCode = (ErrorCode)((msgBody[10] << 24) + (msgBody[11] << 16) + (msgBody[12] << 8) + msgBody[13]);
List <byte> errorInfoArrayList = new List <byte>();
for (int i = 14; i < msgBody.Length; i++)
{
errorInfoArrayList.Add(msgBody[i]);
}
if (errorInfoArrayList.Count > 0)
{
mb.ErrorInfo = errorInfoArrayList.ToArray().ToString2();
}
}
else
{
List <Parameter> pmtList = new List <Parameter>();
Parameter.GetParameterList(msgBody, 10, ref pmtList);
mb.ParameterList = pmtList;
}
if (isCheckCrc && Crc32.GetCrc32(newByteArray) != mh.Crc32)
{
throw new CsaException("消息体CRC校验错误。", ErrorCode.ChecksumError);
}
d.Body = mb;
}
else
{
throw new CsaException("消息解析错误。", ErrorCode.MessageParseError);
}
}
d.Head = mh;
datagramList.Add(d);
}
}
return(datagramList);
}