package org.subethamail.smtp.command;
import java.io.IOException;
import java.util.List;
import org.subethamail.smtp.AuthenticationHandlerFactory;
import org.subethamail.smtp.server.BaseCommand;
import org.subethamail.smtp.server.Session;
import org.subethamail.smtp.util.TextUtils;
/**
* @author Ian McFarland <ian@neo.com>
* @author Jon Stevens
* @author Jeff Schnitzer
* @author Scott Hernandez
*/
public class EhloCommand extends BaseCommand
{
/** */
public EhloCommand()
{
super("EHLO", "Introduce yourself.", "<hostname>");
}
/** */
@Override
public void execute(String commandString, Session sess) throws IOException
{
String[] args = this.getArgs(commandString);
if (args.length < 2)
{
sess.sendResponse("501 Syntax: EHLO hostname");
return;
}
sess.setHelo(args[1]);
// postfix returns...
// 250-server.host.name
// 250-PIPELINING
// 250-SIZE 10240000
// 250-ETRN
// 250 8BITMIME
// Once upon a time this code tracked whether or not HELO/EHLO has been seen
// already and gave an error msg. However, this is stupid and pointless.
// Postfix doesn't care, so we won't either. If you want more, read:
// http://homepages.tesco.net/J.deBoynePollard/FGA/smtp-avoid-helo.html
StringBuilder response = new StringBuilder();
response.append("250-");
response.append(sess.getServer().getHostName());
response.append("\r\n" + "250-8BITMIME");
int maxSize = sess.getServer().getMaxMessageSize();
if (maxSize > 0)
{
response.append("\r\n" + "250-SIZE ");
response.append(maxSize);
}
// Enabling / Hiding TLS is a server setting
if (sess.getServer().getEnableTLS() && !sess.getServer().getHideTLS())
{
response.append("\r\n" + "250-STARTTLS");
}
// Check to see if we support authentication
AuthenticationHandlerFactory authFact = sess.getServer().getAuthenticationHandlerFactory();
if (authFact != null)
{
List<String> supportedMechanisms = authFact.getAuthenticationMechanisms();
if (!supportedMechanisms.isEmpty())
{
response.append("\r\n" + "250-" + AuthCommand.VERB + " ");
response.append(TextUtils.joinTogether(supportedMechanisms, " "));
}
}
response.append("\r\n" + "250 Ok");
sess.sendResponse(response.toString());
}
}