public GPS(string IP, int port, Boolean test)
{
try
{
conn = new SqlConnection(CONNECT_STRING);
conn.Open();
cmd = new SqlCommand(LOGIN_INSERT_COMMMAND_TEXT, conn);
cmd.Parameters.Add("@TerminalID", SqlDbType.NVarChar, 8);
cmd.Parameters.Add("@Date", SqlDbType.DateTime);
}
catch (Exception ex)
{
Console.WriteLine("Error : '{0}'", ex.Message);
//Console.ReadLine();
return;
}
try
{
//initialize the timer for writing to database.
WriteDBAsync.WriteDatabase();
StartListening(IP, port, test);
// Open 2nd listener to simulate two devices, Only for testing
//StartListening(IP, port + 1, test);
ProcessMessages();
}
catch (Exception ex)
{
Console.WriteLine("Error : '{0}'", ex.Message);
//Console.ReadLine();
return;
}
}
public void ProcessMessages()
{
UInt16 sendCRC = 0;
DateTime date;
int year = 0;
int month = 0;
int day = 0;
int hour = 0;
int minute = 0;
int second = 0;
KeyValuePair <List <byte>, StateObject> byteState;
KeyValuePair <UNPACK_STATUS, byte[]> status;
byte[] receiveMessage = null;
StateObject state = null;
byte[] serialNumber = null;
PROTOCOL_NUMBER protocolNumber = PROTOCOL_NUMBER.NONE;
try
{
Boolean firstMessage = true;
acceptDone.Set();
//loop forever
while (true)
{
allDone.WaitOne();
//read fifo until empty
while (true)
{
//read one connection until buffer doesn't contain any more packets
byteState = ReadWrite(PROCESS_STATE.PROCESS, null, null, -1);
if (byteState.Value.fifoCount == -1)
{
break;
}
state = byteState.Value;
while (true)
{
status = Unpack(byteState);
if (status.Key == UNPACK_STATUS.NOT_ENOUGH_BYTES)
{
break;
}
if (status.Key == UNPACK_STATUS.ERROR)
{
Console.WriteLine("Error : Bad Receive Message, Data");
break;
}
//message is 2 start bytes + 1 byte (message length) + 1 byte message length + 2 end bytes
receiveMessage = status.Value;
int messageLength = receiveMessage[2];
Console.WriteLine("Status : '{0}', Receive Message : '{1}'", status.Key == UNPACK_STATUS.GOOD_MESSAGE ? "Good" : "Bad", BytesToString(receiveMessage.Take(messageLength + 5).ToArray()));
if (status.Key != UNPACK_STATUS.GOOD_MESSAGE)
{
break;
}
else
{
if (firstMessage)
{
if (receiveMessage[3] != 0x01)
{
Console.WriteLine("Error : Expected Login Message : '{0}'", BytesToString(receiveMessage));
break;
}
firstMessage = false;
}
//skip start bytes, message length. then go back 4 bytes (CRC and serial number)
serialNumber = receiveMessage.Skip(2 + 1 + messageLength - 4).Take(2).ToArray();
protocolNumber = (PROTOCOL_NUMBER)receiveMessage[3];
Console.WriteLine("Protocol Number : '{0}'", protocolNumber.ToString());
switch (protocolNumber)
{
case PROTOCOL_NUMBER.LOGIN_MESSAGE:
serialNumber.CopyTo(loginResponse, 4);
sendCRC = crc_bytes(loginResponse.Skip(2).Take(loginResponse.Length - 6).ToArray());
loginResponse[loginResponse.Length - 4] = (byte)((sendCRC >> 8) & 0xFF);
loginResponse[loginResponse.Length - 3] = (byte)((sendCRC) & 0xFF);
//
string terminalID = Encoding.ASCII.GetString(receiveMessage.Skip(4).Take(messageLength - 5).ToArray());
Console.WriteLine("Received good login message from Serial Number : '{0}', Terminal ID = '{1}'", "0x" + serialNumber[0].ToString("X2") + serialNumber[1].ToString("X2"), terminalID);
Console.WriteLine("Send Message : '{0}'", BytesToString(loginResponse));
Send(state.workSocket, loginResponse);
StateObjectDB stateObjectDB = new StateObjectDB()
{
terminalID = terminalID, date = DateTime.Now
};
WriteDBAsync.ReadWriteFifo(WriteDBAsync.Mode.WRITE, stateObjectDB);
Console.WriteLine("Wrote to database");
break;
case PROTOCOL_NUMBER.LOCATION_DATA:
year = receiveMessage[4];
month = receiveMessage[5];
day = receiveMessage[6];
hour = receiveMessage[7];
minute = receiveMessage[8];
second = receiveMessage[9];
date = new DateTime(2000 + year, month, day, hour, minute, second);
Console.WriteLine("Received good location message from Serial Number '{0}', Time = '{1}'", "0x" + serialNumber[0].ToString("X2") + serialNumber[1].ToString("X2"), date.ToLongDateString());
break;
case PROTOCOL_NUMBER.ALARM_DATA:
year = receiveMessage[4];
month = receiveMessage[5];
day = receiveMessage[6];
hour = receiveMessage[7];
minute = receiveMessage[8];
second = receiveMessage[9];
date = new DateTime(2000 + year, month, day, hour, minute, second);
Console.WriteLine("Received good alarm message from Serial Number '{0}', Time = '{1}'", "0x" + serialNumber[0].ToString("X2") + serialNumber[1].ToString("X2"), date.ToLongDateString());
int packetLen = alarmResponse.Length - 5;
alarmResponse[2] = (byte)(packetLen & 0xFF);
serialNumber.CopyTo(alarmResponse, packetLen - 1);
sendCRC = crc_bytes(alarmResponse.Skip(2).Take(packetLen - 1).ToArray());
alarmResponse[packetLen + 1] = (byte)((sendCRC >> 8) & 0xFF);
alarmResponse[packetLen + 2] = (byte)((sendCRC) & 0xFF);
Console.WriteLine("Send Message : '{0}'", BytesToString(alarmResponse));
Send(state.workSocket, alarmResponse);
break;
} //end switch
} // End if
} //end while
} //end while fifo > 0
allDone.Reset();
} //end while true
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
