private ITFtpCommand ParseInternal(byte[] message)
{
TFtpStreamReader reader = new TFtpStreamReader(new MemoryStream(message));
ushort opcode = reader.ReadUInt16();
switch (opcode)
{
case ReadRequest.OpCode:
return(ParseReadRequest(reader));
case WriteRequest.OpCode:
return(ParseWriteRequest(reader));
case Data.OpCode:
return(ParseData(reader));
case Acknowledgement.OpCode:
return(ParseAcknowledgement(reader));
case Error.OpCode:
return(ParseError(reader));
case OptionAcknowledgement.OpCode:
return(ParseOptionAcknowledgement(reader));
default:
throw new TFtpParserException("Invalid opcode");
}
}
private Data ParseData(TFtpStreamReader reader)
{
ushort blockNumber = reader.ReadUInt16();
byte[] data = reader.ReadBytes(10000);
return(new Data(blockNumber, data));
}
private Error ParseError(TFtpStreamReader reader)
{
ushort errorCode = reader.ReadUInt16();
string message = ParseNullTerminatedString(reader);
return(new Error(errorCode, message));
}
private Acknowledgement ParseAcknowledgement(TFtpStreamReader reader)
{
ushort blockNumber = reader.ReadUInt16();
return(new Acknowledgement(blockNumber));
}