/// <summary>
/// Create a new SMTP client request.
/// </summary>
/// <param name="actionType">type of action/command</param>
/// <param name="request_Params">remainder of command line once command is removed</param>
/// <param name="state">current SMTP server state</param>
public SmtpRequest(SmtpActionType actionType, string request_Params, SmtpState state)
{
this.action = actionType;
this.state = state;
this.request_Params = request_Params;
}
/// <summary>
/// Create an SMTP request object given a line of the input stream from the client and the current internal state.
/// </summary>
/// <param name="s">line of input</param>
/// <param name="state">current state</param>
/// <returns>A populated SmtpRequest object</returns>
public static SmtpRequest CreateRequest(string s, SmtpState state)
{
SmtpActionType action = null;
string request_Params = null;
if (state == SmtpState.DATA_HDR)
{
if (s.Equals("."))
{
action = SmtpActionType.DATA_END;
}
else if (s.Length < 1)
{
action = SmtpActionType.BLANK_LINE;
}
else
{
action = SmtpActionType.UNRECOG;
request_Params = s;
}
}
else if (state == SmtpState.DATA_BODY)
{
if (s.Equals("."))
{
action = SmtpActionType.DATA_END;
}
else
{
action = SmtpActionType.UNRECOG;
request_Params = s;
}
}
else
{
string su = s.ToUpper();
if (su.StartsWith("EHLO ") || su.StartsWith("HELO"))
{
action = SmtpActionType.EHLO;
request_Params = s.Substring(5);
}
else if (su.StartsWith("MAIL FROM:"))
{
action = SmtpActionType.MAIL;
request_Params = s.Substring(10);
}
else if (su.StartsWith("RCPT TO:"))
{
action = SmtpActionType.RCPT;
request_Params = s.Substring(8);
}
else if (su.StartsWith("DATA"))
{
action = SmtpActionType.DATA;
}
else if (su.StartsWith("QUIT"))
{
action = SmtpActionType.QUIT;
}
else if (su.StartsWith("RSET"))
{
action = SmtpActionType.RSET;
}
else if (su.StartsWith("NOOP"))
{
action = SmtpActionType.NOOP;
}
else if (su.StartsWith("EXPN"))
{
action = SmtpActionType.EXPN;
}
else if (su.StartsWith("VRFY"))
{
action = SmtpActionType.VRFY;
}
else if (su.StartsWith("HELP"))
{
action = SmtpActionType.HELP;
}
else
{
action = SmtpActionType.UNRECOG;
}
}
SmtpRequest req = new SmtpRequest(action, request_Params, state);
return(req);
}
/// <summary>
/// Create a new SMTP client request.
/// </summary>
/// <param name="actionType">type of action/command</param>
/// <param name="request_Params">remainder of command line once command is removed</param>
/// <param name="state">current SMTP server state</param>
public SmtpRequest(SmtpActionType actionType, string request_Params, SmtpState state)
{
this.action = actionType;
this.state = state;
this.request_Params = request_Params;
}
/// <summary>
/// Create a new SMTP client request.
/// </summary>
/// <param name="actionType">type of action/command</param>
/// <param name="requestParams">remainder of command line once command is removed</param>
/// <param name="state">current SMTP server state</param>
public SmtpRequest(SmtpActionType actionType, string requestParams, SmtpState state)
{
_action = actionType;
_state = state;
Params = requestParams;
}
/// <summary>
/// Create an SMTP request object given a line of the input stream from the client and the current internal state.
/// </summary>
/// <param name="s">line of input</param>
/// <param name="state">current state</param>
/// <returns>A populated SmtpRequest object</returns>
public static SmtpRequest CreateRequest(string s, SmtpState state)
{
SmtpActionType action = null;
string request_Params = null;
if (state == SmtpState.DATA_HDR)
{
if (s.Equals("."))
{
action = SmtpActionType.DATA_END;
}
else if (s.Length < 1)
{
action = SmtpActionType.BLANK_LINE;
}
else
{
action = SmtpActionType.UNRECOG;
request_Params = s;
}
}
else if (state == SmtpState.DATA_BODY)
{
if (s.Equals("."))
{
action = SmtpActionType.DATA_END;
}
else
{
action = SmtpActionType.UNRECOG;
request_Params = s;
}
}
else
{
string su = s.ToUpper();
if (su.StartsWith("EHLO ") || su.StartsWith("HELO"))
{
action = SmtpActionType.EHLO;
request_Params = s.Substring(5);
}
else if (su.StartsWith("MAIL FROM:"))
{
action = SmtpActionType.MAIL;
request_Params = s.Substring(10);
}
else if (su.StartsWith("RCPT TO:"))
{
action = SmtpActionType.RCPT;
request_Params = s.Substring(8);
}
else if (su.StartsWith("DATA"))
{
action = SmtpActionType.DATA;
}
else if (su.StartsWith("QUIT"))
{
action = SmtpActionType.QUIT;
}
else if (su.StartsWith("RSET"))
{
action = SmtpActionType.RSET;
}
else if (su.StartsWith("NOOP"))
{
action = SmtpActionType.NOOP;
}
else if (su.StartsWith("EXPN"))
{
action = SmtpActionType.EXPN;
}
else if (su.StartsWith("VRFY"))
{
action = SmtpActionType.VRFY;
}
else if (su.StartsWith("HELP"))
{
action = SmtpActionType.HELP;
}
else
{
action = SmtpActionType.UNRECOG;
}
}
SmtpRequest req = new SmtpRequest(action, request_Params, state);
return req;
}
