private async Task CommandPortAsync(string parameter)
{
var paramSegs = parameter.Split(',');
if (paramSegs.Length != 6)
{
await ReplyAsync(
FtpReplyCode.SyntaxErrorInParametersOrArguments,
"Syntax error, count of comma incorrect");
return;
}
try
{
var bytes = paramSegs.Select(x => byte.Parse(x)).ToArray();
IPAddress remoteIP = new IPAddress(new ArraySegment <byte>(bytes, 0, 4).ToArray());
int remotePort = (bytes[4] << 8) | bytes[5];
userActiveDataPort = remotePort;
userActiveIP = remoteIP;
userActiveProtocal = 1;
dataConnectionMode = DataConnectionMode.Active;
await dataConnection.ConnectActiveAsync(userActiveIP, userActiveDataPort, userActiveProtocal);
await ReplyAsync(FtpReplyCode.CommandOkay, "Data connection established");
return;
}
catch
{
await ReplyAsync(
FtpReplyCode.SyntaxErrorInParametersOrArguments,
"Syntax error, number format incorrect");
return;
}
}