internal SmtpResponse HeloCommand(string CommandLine)
{
var response = new SmtpResponse();
var command = SmtpCommand.Parse(CommandLine);
// TODO validate the incoming domain...
if (command.Name == SmtpCommandName.HELO)
{
if (!string.IsNullOrEmpty(command.Value))
{
response.Code = 250;
response.Message = "Hello " + command.Value + " Kooboo Smtp Server";
this.State = CommandState.Body;
this.ClientHostName = command.Value;
}
else
{
response.Code = 501;
response.Message = "Hostname required";
}
}
else if (command.Name == SmtpCommandName.EHLO)
{
if (!string.IsNullOrEmpty(command.Value))
{
response.Code = 250;
response.Seperator = '-';
response.Message = "Hello " + command.Value + "\r\n250-SIZE 20480000\r\n250-AUTH LOGIN\r\n250 OK";
this.State = CommandState.Body;
this.ClientHostName = command.Value;
}
else
{
response.Code = 501;
response.Message = "Hostname required";
}
}
else if (command.Name == SmtpCommandName.UNKNOWN)
{
response.Code = 550;
response.Message = "bad command";
}
else if (command.Name == SmtpCommandName.QUIT)
{
response.Code = 221;
response.Message = "Goodbye";
response.Close = true;
}
else
{
response.Code = 502;
response.Message = "HELO or EHLO first";
}
this.Log.Add(command, response);
return(response);
}
internal SmtpResponse BodyCommand(string CommandLine)
{
var response = new SmtpResponse();
var command = SmtpCommand.Parse(CommandLine);
if (command.Name == SmtpCommandName.AUTHLOGIN)
{
if (string.IsNullOrEmpty(command.Value))
{
this.State = CommandState.Auth;
response.Code = 334;
response.Message = Convert.ToBase64String(Encoding.ASCII.GetBytes("Username:"******"Password:"******"Sender address must be specified";
}
else if (!ValidMailFrom(command.Value))
{
response.Code = 550;
response.Message = "Invalid Sender address";
}
else
{
response.Code = 250;
response.Message = "Sender OK";
}
}
else if (command.Name == SmtpCommandName.RCPTTO)
{
if (string.IsNullOrEmpty(command.Value))
{
response.Code = 550;
response.Message = "Recipient address must be specified";
}
else
{
var validateResult = ValidateRecipient(command.Value);
if (validateResult.IsOkToSend)
{
response.Code = 250;
response.Message = "Recipient OK";
}
else
{
response.Code = 550;
response.Message = validateResult.ErrorMessage;
}
}
}
else if (command.Name == SmtpCommandName.DATA)
{
//public static string DataStart = "354 ";
this.State = CommandState.Data;
response.Code = 354;
response.Message = "End data with <CLRF>.<CLRF>";
}
else if (command.Name == SmtpCommandName.QUIT)
{
response.Code = 221;
response.Message = "Goodbye";
response.Close = true;
}
else
{
response.Code = 550;
response.Message = "Invalid command";
}
this.Log.Add(command, response);
return(response);
}
public static SmtpCommand Parse(string CommandLine)
{
if (string.IsNullOrWhiteSpace(CommandLine))
{
return(new SmtpCommand()
{
Name = SmtpCommandName.UNKNOWN, CommandLine = CommandLine
});
}
var scanner = new CommandScanner(CommandLine);
var token = scanner.ConsumeNext();
if (token == null)
{
return(new SmtpCommand()
{
Name = SmtpCommandName.UNKNOWN, CommandLine = CommandLine
});
}
token = token.ToUpper();
var result = new SmtpCommand()
{
CommandLine = CommandLine, Name = SmtpCommandName.UNKNOWN
};
if (token == "HELO")
{
result.Name = SmtpCommandName.HELO;
result.Value = scanner.ConsumeRest();
}
else if (token == "EHLO")
{
result.Name = SmtpCommandName.EHLO;
result.Value = scanner.ConsumeRest();
}
else if (token == "AUTH")
{
var next = scanner.ConsumeNext();
if (next != null && next.ToUpper() == "LOGIN")
{
result.Name = SmtpCommandName.AUTHLOGIN;
result.Value = scanner.ConsumeRest();
}
}
else if (token == "MAIL")
{
var next = scanner.ConsumeNext();
if (next != null && next.ToUpper() == "FROM")
{
result.Name = SmtpCommandName.MAILFROM;
result.Value = scanner.ConsumeRestAfterComma();
}
}
else if (token == "RCPT")
{
var next = scanner.ConsumeNext();
if (next != null && next.ToUpper() == "TO")
{
result.Name = SmtpCommandName.RCPTTO;
result.Value = scanner.ConsumeRestAfterComma();
}
}
else if (token == "DATA")
{
result.Name = SmtpCommandName.DATA;
result.Value = scanner.ConsumeRest();
}
else if (token == "QUIT")
{
result.Name = SmtpCommandName.QUIT;
result.Value = scanner.ConsumeRest();
}
else if (token == "RSET")
{
result.Name = SmtpCommandName.RSET;
result.Value = scanner.ConsumeRest();
}
else if (token == "HELP")
{
result.Name = SmtpCommandName.HELP;
result.Value = scanner.ConsumeRest();
}
else if (token == "VRFY")
{
result.Name = SmtpCommandName.VRFY;
result.Value = scanner.ConsumeRest();
}
return(result);
}