| public Send ( string message ) : IAsyncResult | ||
| message | string | /// The message. /// |
| return | IAsyncResult | |
/// <summary>
/// The rcpt.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
/// <param name="parts">
/// The parts.
/// </param>
private static void RCPT(Connection connection, string[] parts)
{
string line = string.Join(" ", parts);
// Check for the ":"
if (!line.ToUpper().StartsWith("RCPT TO") || !line.Contains(":"))
{
connection.Send("504 Command parameter not implemented");
return;
}
// Check command order
if (connection.Session.Sender == null || connection.Session.MailFrom == null)
{
connection.Send("503 Bad sequence of commands");
return;
}
string address = line.Substring(line.IndexOf(":") + 1).Replace("<", string.Empty).Replace(">", string.Empty).Trim();
if (!connection.Session.Recipients.Contains(address))
{
connection.Session.Recipients.Add(address);
}
connection.Send("250 <{0}> OK", address);
}
/// <summary>
/// The data.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
private void DATA(Connection connection)
{
// Check command order
if (connection.Session.Sender == null || connection.Session.MailFrom == null
|| connection.Session.Recipients.Count == 0)
{
connection.Send("503 Bad sequence of commands");
return;
}
string file = null;
try
{
Stream networkStream = new NetworkStream(connection.Client, false);
var output = new List<string>();
using (var reader = new StreamReader(networkStream))
{
string line;
connection.Send("354 Start mail input; end with <CRLF>.<CRLF>").AsyncWaitHandle.WaitOne();
while ((line = reader.ReadLine()) != ".")
{
// reverse any dot-stuffing per RFC 2821, section 4.5.2
if (line.StartsWith(".") && line.Length > 1)
{
line = line.Substring(1);
}
output.Add(line);
}
reader.Close();
}
file = _messageFileService.SaveMessage(output);
}
catch (IOException e)
{
Logger.WriteWarning(
"IOException received in Processor.DATA while reading message. Closing connection. Message: " + e.Message,
connection.ConnectionId);
connection.Close();
return;
}
OnMessageReceived(connection, file);
connection.Send("250 OK");
}
/// <summary>
/// The helo.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
/// <param name="parts">
/// The parts.
/// </param>
private static void HELO(Connection connection, string[] parts)
{
connection.Session.Sender = parts.Length < 2 ? string.Empty : parts[1];
connection.Send("250 {0}", Dns.GetHostName().ToLower());
}
/// <summary>
/// The mail.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
/// <param name="parts">
/// The parts.
/// </param>
private static void MAIL(Connection connection, string[] parts)
{
string line = string.Join(" ", parts);
// Check for the right number of parameters
if (parts.Length < 2)
{
connection.Send("504 Command parameter not implemented");
return;
}
// Check for the ":"
if (!parts[1].ToUpper().StartsWith("FROM") || !line.Contains(":"))
{
connection.Send("504 Command parameter not implemented");
return;
}
// Check command order
if (connection.Session.Sender == null)
{
connection.Send("503 Bad sequence of commands");
return;
}
// Set the from settings
connection.Session.Reset();
string address = line.Substring(line.IndexOf(":") + 1).Replace("<", string.Empty).Replace(">", string.Empty).Trim();
connection.Session.MailFrom = address;
// Check for encoding
foreach (string part in parts.Where(part => part.ToUpper().StartsWith("BODY=")))
{
switch (part.ToUpper().Replace("BODY=", string.Empty).Trim())
{
case "8BITMIME":
connection.Session.UseUtf8 = true;
break;
default:
connection.Session.UseUtf8 = false;
break;
}
break;
}
connection.Send("250 <{0}> OK", address);
}
/// <summary>
/// The process command.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
/// <param name="data">
/// The data.
/// </param>
public void ProcessCommand(Connection connection, object data)
{
if (data is byte[])
{
connection.Session.Message = (byte[])data;
connection.Send("250 OK");
}
else
{
// Command mode
var command = (string)data;
string[] parts = command.Split(' ');
switch (parts[0].ToUpper())
{
case "HELO":
HELO(connection, parts);
break;
case "EHLO":
EHLO(connection, parts);
break;
case "SEND":
case "SOML":
case "SAML":
case "MAIL":
MAIL(connection, parts);
break;
case "RCPT":
RCPT(connection, parts);
break;
case "DATA":
DATA(connection);
break;
case "VRFY":
connection.Send("252 Cannot VRFY user, but will accept message and attempt delivery");
break;
case "EXPN":
connection.Send("252 Cannot expand upon list");
break;
case "RSET":
connection.Session.Reset();
connection.Send("250 OK");
break;
case "NOOP":
connection.Send("250 OK");
break;
case "QUIT":
connection.Send("221 Goodbye!");
connection.Close();
break;
case "HELP":
case "TURN":
connection.Send("502 Command not implemented");
break;
default:
connection.Send("500 Command not recognized");
break;
}
}
}
/// <summary>
/// The data.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
private void DATA(Connection connection)
{
// Check command order
if (connection.Session.Sender == null || connection.Session.MailFrom == null
|| connection.Session.Recipients.Count == 0)
{
connection.Send("503 Bad sequence of commands");
return;
}
string file;
do
{
// the file must not exists. the resolution of DataTime.Now may be slow w.r.t. the speed of the received files
file = Path.Combine(
mailFolder,
string.Format("{0}-{1}.eml", DateTime.Now.ToString("yyyyMMddHHmmssFF"), Guid.NewGuid().ToString().Substring(0, 2)));
}
while (File.Exists(file));
try
{
Stream networkStream = new NetworkStream(connection.Client, false);
using (var reader = new StreamReader(networkStream))
{
using (var writer = new StreamWriter(file))
{
string line;
connection.Send("354 Start mail input; end with <CRLF>.<CRLF>").AsyncWaitHandle.WaitOne();
while ((line = reader.ReadLine()) != ".")
{
writer.WriteLine(line);
}
writer.Close();
}
reader.Close();
}
}
catch (IOException e)
{
Logger.WriteWarning(
"IOException received in Processor.DATA while reading message. Closing connection. Message: " + e.Message,
connection.ConnectionId);
connection.Close();
return;
}
OnMessageReceived(connection, file);
connection.Send("250 OK");
}
private static void DATA(Connection connection)
{
// Check command order
if (connection.Session.Sender == null || connection.Session.MailFrom == null || connection.Session.Recipients.Count == 0)
{
connection.Send("503 Bad sequence of commands");
return;
}
string file = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, DateTime.Now.ToString("yyyyMMddHHmmssFF") + ".eml");
try
{
Stream networkStream = new NetworkStream(connection.Client, false);
StreamReader reader = new StreamReader(networkStream);
StreamWriter writer = new StreamWriter(file);
string line;
connection.Send("354 Start mail input; end with <CRLF>.<CRLF>").AsyncWaitHandle.WaitOne();
while ((line = reader.ReadLine()) != ".")
writer.WriteLine(line);
writer.Close();
reader.Close();
}
catch(IOException e)
{
Logger.WriteWarning("IOException received in Processor.DATA while reading message. Closing connection. Message: " + e.Message, connection.ConnectionId);
connection.Close();
return;
}
OnMessageReceived(connection, file);
connection.Send("250 OK");
}
/// <summary>
/// The process command.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
/// <param name="data">
/// The data.
/// </param>
public void ProcessCommand(Connection connection, object data)
{
if (data is byte[])
{
connection.Session.Message = (byte[])data;
connection.Send("250 OK");
}
else
{
// Command mode
var command = (string)data;
string[] parts = command.Split(' ');
switch (parts[0].ToUpper())
{
case "HELO":
HELO(connection, parts);
break;
case "EHLO":
EHLO(connection, parts);
break;
case "SEND":
case "SOML":
case "SAML":
case "MAIL":
MAIL(connection, parts);
break;
case "RCPT":
RCPT(connection, parts);
break;
case "DATA":
DATA(connection);
break;
case "VRFY":
connection.Send("252 Cannot VRFY user, but will accept message and attempt delivery");
break;
case "EXPN":
connection.Send("252 Cannot expand upon list");
break;
case "RSET":
connection.Session.Reset();
connection.Send("250 OK");
break;
case "NOOP":
connection.Send("250 OK");
break;
case "QUIT":
connection.Send("221 Goodbye!");
connection.Close();
break;
case "HELP":
case "TURN":
connection.Send("502 Command not implemented");
break;
default:
connection.Send("500 Command not recognized");
break;
}
}
}
/// <summary>
/// The helo.
/// </summary>
/// <param name="connection">
/// The connection.
/// </param>
/// <param name="parts">
/// The parts.
/// </param>
private static void HELO(Connection connection, string[] parts)
{
connection.Session.Sender = parts.Length < 2 ? string.Empty : parts[1];
connection.Send("250 {0}", Dns.GetHostName().ToLower());
}