/// <summary>
/// Main entry point
/// </summary>
static void Main(string[] args)
{
var prog = new Program();
try {
for (var index = 0; index < args.Length; index++)
{
int tmp;
var opt = args[index];
if (string.IsNullOrEmpty(args[index]))
{
continue;
}
if (opt[0] == '-' || opt[0] == '/')
{
if (opt.Length == 1)
{
throw new ArgumentException($"Unknown option {opt}.");
}
var optc = opt[1];
if (optc == '-' && opt[0] != '/')
{
// Parse -- long option
var optl = opt.Substring(2);
switch (optl)
{
case "help":
case "source":
case "close":
case "wait":
case "local":
optc = optl[0];
break;
case "version":
case "relay":
case "websocket":
optc = char.ToUpperInvariant(optl[0]);
break;
case "proxy":
optc = 'x';
break;
default:
throw new ArgumentException($"Unknown option {opt}.");
}
}
switch (optc)
{
case 'd':
prog.NoStdIn = true;
break;
case 'c':
prog.CloseOnEof = true;
break;
case 'R':
prog.UseRelay = true;
break;
case 'W':
prog.UseWS = true;
break;
case '?':
case 'h':
PrintHelp();
return;
case 'x':
case 's':
index++;
SocketAddress proxy;
if (index >= args.Length ||
!SocketAddress.TryParse(args[index], out proxy))
{
throw new ArgumentException($"Bad value for {opt}.");
}
prog.Proxy = proxy;
break;
case 'w':
index++;
if (index >= args.Length ||
!int.TryParse(args[index], out tmp))
{
throw new ArgumentException($"Bad value for {opt}.");
}
prog.Timeout = tmp * 1000;
break;
case 'l':
index++;
if (index >= args.Length ||
!int.TryParse(args[index], out tmp))
{
throw new ArgumentException($"Bad value for {opt}.");
}
prog.LocalPort = (ushort)tmp;
break;
default:
throw new ArgumentException($"Unknown option {opt}.");
}
continue;
}
if (string.IsNullOrEmpty(prog.Host))
{
prog.Host = opt;
}
else
{
var ports = opt.Split('-');
if (!int.TryParse(ports[0], out tmp))
{
throw new ArgumentException($"Invalid port value {opt}.");
}
prog.Ports.Add(tmp);
if (ports.Length == 2)
{
if (!int.TryParse(ports[1], out var hi) || hi > ushort.MaxValue)
{
throw new ArgumentException($"Invalid upper bound for port range: {opt}.");
}
while (++tmp <= hi)
{
prog.Ports.Add(tmp);
}
}
else if (ports.Length > 2)
{
throw new ArgumentException($"Invalid port range: {opt}.");
}
}
}
prog.Validate();
}
catch (ArgumentException e) {
Console.Error.WriteLine($"Error: {e.Message}");
PrintHelp();
return;
}
// Register console cancellation
var cts = new CancellationTokenSource();
Console.CancelKeyPress += (o, e) => {
Console.Error.WriteLine();
Console.Error.WriteLine("Ctrl+C => Cancellation requested...");
cts.Cancel();
e.Cancel = true; // Wait for cts to kill readers and exit - do not exit immediately.
};
prog.RunAsync(cts.Token).Wait();
}
