internal SmtpConnection(SmtpTransport parent, SmtpClient client, ICredentialsByHost credentials, ISmtpAuthenticationModule[] authenticationModules)
{
_client = client;
_credentials = credentials;
_authenticationModules = authenticationModules;
_parent = parent;
_tcpClient = new TcpClient();
_onCloseHandler = new EventHandler(OnClose);
}
private void Initialize()
{
_transport = new SmtpTransport(this);
if (NetEventSource.IsEnabled)
{
NetEventSource.Associate(this, _transport);
}
_onSendCompletedDelegate = new SendOrPostCallback(SendCompletedWaitCallback);
if (_host != null && _host.Length != 0)
{
_host = _host.Trim();
}
if (_port == 0)
{
_port = DefaultPort;
}
if (_targetName == null)
{
_targetName = "SMTPSVC/" + _host;
}
if (clientDomain == null)
{
// We use the local host name as the default client domain
// for the client's EHLO or HELO message. This limits the
// information about the host that we share. Additionally, the
// FQDN is not available to us or useful to the server (internal
// machine connecting to public server).
// SMTP RFC's require ASCII only host names in the HELO/EHLO message.
string clientDomainRaw = IPGlobalProperties.GetIPGlobalProperties().HostName;
IdnMapping mapping = new IdnMapping();
try
{
clientDomainRaw = mapping.GetAscii(clientDomainRaw);
}
catch (ArgumentException) { }
// For some inputs GetAscii may fail (bad Unicode, etc). If that happens
// we must strip out any non-ASCII characters.
// If we end up with no characters left, we use the string "LocalHost". This
// matches Outlook behavior.
StringBuilder sb = new StringBuilder();
char ch;
for (int i = 0; i < clientDomainRaw.Length; i++)
{
ch = clientDomainRaw[i];
if ((ushort)ch <= 0x7F)
{
sb.Append(ch);
}
}
if (sb.Length > 0)
{
clientDomain = sb.ToString();
}
else
{
clientDomain = "LocalHost";
}
}
}