public static Task <int> DetectProtocolVersion(string ip_or_host, int port)
{
return(DetectProtocolVersion(new Func <Task <Stream> >(async() =>
{
return await ManagedStream.GetStream(ip_or_host, port);
})));
}
public static async Task <int> DetectProtocolVersion(Func <Task <Stream> > stream_retriever)
{
int protocol_version = 0;
//determine if the protocol version is 2
try
{
(await ManagedStream.GetStream()).WriteByte((byte)'?'); //enter the management interface
(await ManagedStream.GetStream()).WriteByte((byte)'S');
if ((byte)(await ManagedStream.GetStream()).ReadByte() != (byte)'?') //read ?
{
throw new Exception();
}
await Task.Delay(10000);
protocol_version = 2;
}
catch (Exception ex)
{
//the protocol version isn't 2.1. Check to see if it's 2.0
await Task.Delay(10000);
try
{
(await ManagedStream.GetStream()).WriteByte((byte)'?'); //enter the management interface
await Task.Delay(500);
(await ManagedStream.GetStream()).WriteByte((byte)'L');
await Task.Delay(250);
if ((byte)(await ManagedStream.GetStream()).ReadByte() != (byte)'?') //read ?
{
throw new Exception();
}
await Task.Delay(10000);
protocol_version = 1;
}
catch (Exception ex1)
{
//the major protocol version isn't 1. test to see if it is 0.
await Task.Delay(10000);
try
{
using (StreamWriter conn_writer = new StreamWriter((await ManagedStream.GetStream())))
{
conn_writer.AutoFlush = true;
conn_writer.NewLine = "\r\n";
conn_writer.BaseStream.WriteByte((byte)'?');
await Task.Delay(1000);
conn_writer.WriteLine("write");
await Task.Delay(1000);
conn_writer.WriteLine("id eeprom");
await Task.Delay(1000);
conn_writer.WriteLine("raw");
await Task.Delay(1000);
}
if ((byte)(await ManagedStream.GetStream()).ReadByte() != (byte)'?') //read ?
{
throw new Exception("Unable to determine protocol version.");
}
}
catch (Exception ex2)
{
throw;
}
}
}
return(protocol_version);
}
