/// <summary>
/// Send the data to the server
/// </summary>
/// <param name="data">Data to send to the server</param>
/// <param name="failedCallback">Action to call if fails to send.</param>
private async Task <MantaOutboundClientSendResult> ExecDataAsync(string data)
{
await SmtpStream.WriteLineAsync("DATA");
string response = await SmtpStream.ReadAllLinesAsync(); // Data response or Mail From if pipelining
// If the remote MX supports pipelining then we need to check the MAIL FROM and RCPT to responses.
if (_CanPipeline)
{
// Check MAIL FROM OK.
if (!response.StartsWith("250"))
{
await SmtpStream.ReadAllLinesAsync(); // RCPT TO
await SmtpStream.ReadAllLinesAsync(); // DATA
return(new MantaOutboundClientSendResult(MantaOutboundClientResult.RejectedByRemoteServer, response, _VirtualMta, _MXRecord));
}
// Check RCPT TO OK.
response = await SmtpStream.ReadAllLinesAsync();
if (!response.StartsWith("250"))
{
await SmtpStream.ReadAllLinesAsync(); // DATA
return(new MantaOutboundClientSendResult(MantaOutboundClientResult.RejectedByRemoteServer, response, _VirtualMta, _MXRecord));
}
// Get the Data Command response.
response = await SmtpStream.ReadAllLinesAsync();
}
if (!response.StartsWith("354"))
{
return(new MantaOutboundClientSendResult(MantaOutboundClientResult.RejectedByRemoteServer, response, _VirtualMta, _MXRecord));
}
// Send the message data using the correct transport MIME
SmtpStream.SetSmtpTransportMIME(_DataTransportMime);
await SmtpStream.WriteAsync(data, false);
await SmtpStream.WriteAsync(MtaParameters.NewLine + "." + MtaParameters.NewLine, false);
// Data done so return to 7-Bit mode.
SmtpStream.SetSmtpTransportMIME(SmtpTransportMIME._7BitASCII);
response = await SmtpStream.ReadAllLinesAsync();
if (!response.StartsWith("250"))
{
return(new MantaOutboundClientSendResult(MantaOutboundClientResult.RejectedByRemoteServer, response, _VirtualMta, _MXRecord));
}
_MessagesAccepted++;
return(new MantaOutboundClientSendResult(MantaOutboundClientResult.Success, response, _VirtualMta, _MXRecord));
}
public async Task TestWriteAsync()
{
using (var stream = new SmtpStream(new DummyNetworkStream(), new NullProtocolLogger())) {
var memory = (MemoryStream)stream.Stream;
var buffer = new byte[8192];
var buf1k = new byte[1024];
var buf4k = new byte[4096];
var buf9k = new byte[9216];
byte [] mem;
using (var rng = new RNGCryptoServiceProvider()) {
rng.GetBytes(buf1k);
rng.GetBytes(buf4k);
rng.GetBytes(buf9k);
}
// Test #1: write less than 4K to make sure that SmtpStream buffers it
await stream.WriteAsync(buf1k, 0, buf1k.Length);
Assert.AreEqual(0, memory.Length, "#1");
// Test #2: make sure that flushing the SmtpStream flushes the entire buffer out to the network
await stream.FlushAsync();
Assert.AreEqual(buf1k.Length, memory.Length, "#2");
mem = memory.GetBuffer();
for (int i = 0; i < buf1k.Length; i++)
{
Assert.AreEqual(buf1k[i], mem[i], "#2 byte[{0}]", i);
}
memory.SetLength(0);
// Test #3: write exactly 4K to make sure it passes through w/o the need to flush
await stream.WriteAsync(buf4k, 0, buf4k.Length);
Assert.AreEqual(buf4k.Length, memory.Length, "#3");
mem = memory.GetBuffer();
for (int i = 0; i < buf4k.Length; i++)
{
Assert.AreEqual(buf4k[i], mem[i], "#3 byte[{0}]", i);
}
memory.SetLength(0);
// Test #4: write 1k and then write 4k, make sure that only 4k passes thru (last 1k gets buffered)
await stream.WriteAsync(buf1k, 0, buf1k.Length);
await stream.WriteAsync(buf4k, 0, buf4k.Length);
Assert.AreEqual(4096, memory.Length, "#4");
await stream.FlushAsync();
Assert.AreEqual(buf1k.Length + buf4k.Length, memory.Length, "#4");
Array.Copy(buf1k, 0, buffer, 0, buf1k.Length);
Array.Copy(buf4k, 0, buffer, buf1k.Length, buf4k.Length);
mem = memory.GetBuffer();
for (int i = 0; i < buf1k.Length + buf4k.Length; i++)
{
Assert.AreEqual(buffer[i], mem[i], "#4 byte[{0}]", i);
}
memory.SetLength(0);
// Test #5: write 9k and make sure only the first 8k goes thru (last 1k gets buffered)
await stream.WriteAsync(buf9k, 0, buf9k.Length);
Assert.AreEqual(8192, memory.Length, "#5");
await stream.FlushAsync();
Assert.AreEqual(buf9k.Length, memory.Length, "#5");
mem = memory.GetBuffer();
for (int i = 0; i < buf9k.Length; i++)
{
Assert.AreEqual(buf9k[i], mem[i], "#5 byte[{0}]", i);
}
memory.SetLength(0);
}
}
/// <summary>
/// Send the data to the server
/// </summary>
/// <param name="data">Data to send to the server</param>
/// <param name="failedCallback">Action to call if fails to send.</param>
public async Task <bool> ExecDataAsync(string data, Action <string> failedCallback, Func <string, Task> successCallbackAsync)
{
if (!base.Connected)
{
return(false);
}
_LastActive = DateTime.UtcNow;
IsActive = true;
await SmtpStream.WriteLineAsync("DATA");
string response = await SmtpStream.ReadAllLinesAsync();
// If the remote MX supports pipelining then we need to check the MAIL FROM and RCPT to responses.
if (_CanPipeline)
{
// Check MAIL FROM OK.
if (!response.StartsWith("250"))
{
failedCallback(response);
IsActive = false;
return(false);
}
// Check RCPT TO OK.
response = await SmtpStream.ReadAllLinesAsync();
if (!response.StartsWith("250"))
{
failedCallback(response);
IsActive = false;
return(false);
}
// Get the Data Command response.
response = await SmtpStream.ReadAllLinesAsync();
}
_LastActive = DateTime.UtcNow;
if (!response.StartsWith("354"))
{
failedCallback(response);
IsActive = false;
return(false);
}
// Increment the data commands as server has responded positiely.
_DataCommands++;
// Send the message data using the correct transport MIME
SmtpStream.SetSmtpTransportMIME(_DataTransportMime);
await SmtpStream.WriteAsync(data, false);
await SmtpStream.WriteAsync(MtaParameters.NewLine + "." + MtaParameters.NewLine, false);
_LastActive = DateTime.UtcNow;
// Data done so return to 7-Bit mode.
SmtpStream.SetSmtpTransportMIME(SmtpTransportMIME._7BitASCII);
response = await SmtpStream.ReadAllLinesAsync();
_LastActive = DateTime.UtcNow;
IsActive = false;
if (!response.StartsWith("250"))
{
failedCallback(response);
}
else
{
await successCallbackAsync(response);
}
// If max messages have been sent quit the connection.
if (_DataCommands >= OutboundRuleManager.GetMaxMessagesPerConnection(MXRecord, MtaIpAddress))
{
ExecQuitAsync().Wait();
}
return(true);
}
