/// <summary>
/// Parse a packet (array of bytes) and returns a RCON_Event object
/// </summary>
/// <param name="pckt_bytes">Packet as bytes</param>
/// <returns>Returns a RCON_Event object</returns>
public RCON_Event ParsePacket(byte[] pckt_bytes)
{
logger.Trace("RCON_Client.ParsePacket(bytes) starts.");
/*
* pckt_bytes is a concatenation of:
* - the start delimiter "┐"
* - a short (16-bit integer) corresponding to the size of the JSON
* - a short (16-bit integer) corresponding to eventID of the RCON event
* - the JSON
* - the end delimiter "└"
*/
UTF8Encoding uTF8 = new UTF8Encoding();
// skip the start delimiter
int byte_ptr = this.start_del_bytes.Length;
// number of bytes for 16-bit integer
int short_bytes = 2;
logger.Trace("Getting JSON size from the packet as bytes.");
// convert bytes to short
short json_size = BitConverter.ToInt16(pckt_bytes, byte_ptr);
byte_ptr += short_bytes;
logger.Trace("Getting event ID from the packet as bytes.");
short eventID = BitConverter.ToInt16(pckt_bytes, byte_ptr);
byte_ptr += short_bytes;
logger.Trace("Get the JSON from the packet as bytes.");
// get json as string from bytes and remove the end delimiter
string pckt_json = uTF8.GetString(pckt_bytes, byte_ptr, json_size).TrimEnd('└');
logger.Trace($"Creating an event.");
RCON_Event rcon_event = new RCON_Event(json_size, eventID, pckt_json, logger);
logger.Trace("RCON_Client.ParsePacket(bytes) finishes.");
return(rcon_event);
}
/// <summary>
/// Receive the next event from the server
/// </summary>
/// <returns>Returns a RCON_Event if successfully received the next event, otherwise returns null</returns>
public RCON_Event ReceiveEvent()
{
logger.Trace("RCON_Client.ReceiveEvent() starts.");
RCON_Event rcon_evt = null;
try
{
logger.Trace("Getting stream from the client.");
// always get stream, and do not close it afterwards
NetworkStream stream = this.client.GetStream();
logger.Trace("Setting timeout of stream's reading to 7000ms.");
stream.ReadTimeout = 7000;
byte[] packet_received = new byte[this.client.ReceiveBufferSize];
if (this.client.ReceiveBufferSize > 0)
{
logger.Trace("Reading data from the stream.");
// reads data from stream and put it in the buffer "packet_received"
stream.Read(packet_received, 0, packet_received.Length);
logger.Trace("Parsing the data received and create a new event from it.");
rcon_evt = ParsePacket(packet_received);
logger.Debug($"Event {(EventType)rcon_evt.EventID} ({rcon_evt.EventID}) received.");
}
logger.Trace("Finished checking for data in the stream");
}
catch (Exception e)
{
logger.Error("Failed to receive event.");
logger.Debug($"Error: {e.ToString()}");
}
logger.Trace("RCON_Client.ReceiveEvent() finishes.");
return(rcon_evt);
}
private lib.RCON_Event receiveEvt(lib.RCON_Client rcon)
{
lib.RCON_Event evt = rcon.ReceiveEvent();
//Console.WriteLine("");
return(evt);
}
