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* regarding copyright ownership. The ASF licenses this file *
* to you under the Apache License, Version 2.0 (the *
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* http://www.apache.org/licenses/LICENSE-2.0 *
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package org.apache.james.smtpserver;
import org.apache.avalon.cornerstone.services.connection.ConnectionHandler;
import org.apache.avalon.excalibur.pool.DefaultPool;
import org.apache.avalon.excalibur.pool.HardResourceLimitingPool;
import org.apache.avalon.excalibur.pool.ObjectFactory;
import org.apache.avalon.excalibur.pool.Pool;
import org.apache.avalon.excalibur.pool.Poolable;
import org.apache.avalon.framework.activity.Initializable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.container.ContainerUtil;
import org.apache.avalon.framework.logger.LogEnabled;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.james.Constants;
import org.apache.james.core.AbstractJamesService;
import org.apache.james.services.MailServer;
import org.apache.james.services.UsersRepository;
import org.apache.james.util.NetMatcher;
import org.apache.james.util.watchdog.Watchdog;
import org.apache.james.util.watchdog.WatchdogFactory;
import org.apache.mailet.MailetContext;
/**
* <p>Accepts SMTP connections on a server socket and dispatches them to SMTPHandlers.</p>
*
* <p>Also responsible for loading and parsing SMTP specific configuration.</p>
*
* @version 1.1.0, 06/02/2001
*/
/*
* IMPORTANT: SMTPServer extends AbstractJamesService. If you implement ANY
* lifecycle methods, you MUST call super.<method> as well.
*/
public class SMTPServer extends AbstractJamesService implements SMTPServerMBean {
/**
* The handler chain - SMTPhandlers can lookup handlerchain to obtain
* Command handlers , Message handlers and connection handlers
*/
SMTPHandlerChain handlerChain = new SMTPHandlerChain();
/**
* The mailet context - we access it here to set the hello name for the Mailet API
*/
MailetContext mailetcontext;
/**
* The user repository for this server - used to authenticate
* users.
*/
private UsersRepository users;
/**
* The internal mail server service.
*/
private MailServer mailServer;
/**
* Whether authentication is required to use
* this SMTP server.
*/
private final static int AUTH_DISABLED = 0;
private final static int AUTH_REQUIRED = 1;
private final static int AUTH_ANNOUNCE = 2;
private int authRequired = AUTH_DISABLED;
/**
* Whether the server verifies that the user
* actually sending an email matches the
* authentication credentials attached to the
* SMTP interaction.
*/
private boolean verifyIdentity = false;
/**
* Whether the server needs helo to be send first
*/
private boolean heloEhloEnforcement = false;
/**
* This is a Network Matcher that should be configured to contain
* authorized networks that bypass SMTP AUTH requirements.
*/
private NetMatcher authorizedNetworks = null;
/**
* The maximum message size allowed by this SMTP server. The default
* value, 0, means no limit.
*/
private long maxMessageSize = 0;
/**
* The number of bytes to read before resetting
* the connection timeout timer. Defaults to
* 20 KB.
*/
private int lengthReset = 20 * 1024;
/**
* The pool used to provide SMTP Handler objects
*/
private Pool theHandlerPool = null;
/**
* The pool used to provide SMTP Handler objects
*/
private ObjectFactory theHandlerFactory = new SMTPHandlerFactory();
/**
* The factory used to generate Watchdog objects
*/
private WatchdogFactory theWatchdogFactory;
/**
* The configuration data to be passed to the handler
*/
private SMTPHandlerConfigurationData theConfigData
= new SMTPHandlerConfigurationDataImpl();
private ServiceManager serviceManager;
/**
* @see org.apache.avalon.framework.service.Serviceable#service(ServiceManager)
*/
public void service( final ServiceManager manager ) throws ServiceException {
super.service( manager );
serviceManager = manager;
mailetcontext = (MailetContext) manager.lookup("org.apache.mailet.MailetContext");
mailServer = (MailServer) manager.lookup(MailServer.ROLE);
users = (UsersRepository) manager.lookup(UsersRepository.ROLE);
}
/**
* @see org.apache.avalon.framework.configuration.Configurable#configure(Configuration)
*/
public void configure(final Configuration configuration) throws ConfigurationException {
super.configure(configuration);
if (isEnabled()) {
mailetcontext.setAttribute(Constants.HELLO_NAME, helloName);
Configuration handlerConfiguration = configuration.getChild("handler");
String authRequiredString = handlerConfiguration.getChild("authRequired").getValue("false").trim().toLowerCase();
if (authRequiredString.equals("true")) authRequired = AUTH_REQUIRED;
else if (authRequiredString.equals("announce")) authRequired = AUTH_ANNOUNCE;
else authRequired = AUTH_DISABLED;
verifyIdentity = handlerConfiguration.getChild("verifyIdentity").getValueAsBoolean(false);
if (authRequired != AUTH_DISABLED) {
if (verifyIdentity) {
getLogger().info("This SMTP server requires authentication and verifies that the authentication credentials match the sender address.");
} else {
getLogger().info("This SMTP server requires authentication, but doesn't verify that the authentication credentials match the sender address.");
}
} else {
getLogger().info("This SMTP server does not require authentication.");
}
String authorizedAddresses = handlerConfiguration.getChild("authorizedAddresses").getValue(null);
if (authRequired == AUTH_DISABLED && authorizedAddresses == null) {
/* if SMTP AUTH is not requred then we will use
* authorizedAddresses to determine whether or not to
* relay e-mail. Therefore if SMTP AUTH is not
* required, we will not relay e-mail unless the
* sending IP address is authorized.
*
* Since this is a change in behavior for James v2,
* create a default authorizedAddresses network of
* 0.0.0.0/0, which matches all possible addresses, thus
* preserving the current behavior.
*
* James v3 should require the <authorizedAddresses>
* element.
*/
authorizedAddresses = "0.0.0.0/0.0.0.0";
}
if (authorizedAddresses != null) {
java.util.StringTokenizer st = new java.util.StringTokenizer(authorizedAddresses, ", ", false);
java.util.Collection networks = new java.util.ArrayList();
while (st.hasMoreTokens()) {
String addr = st.nextToken();
networks.add(addr);
}
authorizedNetworks = new NetMatcher(networks);
}
if (authorizedNetworks != null) {
getLogger().info("Authorized addresses: " + authorizedNetworks.toString());
}
// get the message size limit from the conf file and multiply
// by 1024, to put it in bytes
maxMessageSize = handlerConfiguration.getChild( "maxmessagesize" ).getValueAsLong( maxMessageSize ) * 1024;
if (maxMessageSize > 0) {
getLogger().info("The maximum allowed message size is " + maxMessageSize + " bytes.");
} else {
getLogger().info("No maximum message size is enforced for this server.");
}
// How many bytes to read before updating the timer that data is being transfered
lengthReset = configuration.getChild("lengthReset").getValueAsInteger(lengthReset);
if (lengthReset <= 0) {
throw new ConfigurationException("The configured value for the idle timeout reset, " + lengthReset + ", is not valid.");
}
if (getLogger().isInfoEnabled()) {
getLogger().info("The idle timeout will be reset every " + lengthReset + " bytes.");
}
heloEhloEnforcement = handlerConfiguration.getChild("heloEhloEnforcement").getValueAsBoolean(true);
if (authRequiredString.equals("true")) authRequired = AUTH_REQUIRED;
//set the logger
ContainerUtil.enableLogging(handlerChain,getLogger());
try {
ContainerUtil.service(handlerChain,serviceManager);
} catch (ServiceException e) {
if (getLogger().isErrorEnabled()) {
getLogger().error("Failed to service handlerChain",e);
}
throw new ConfigurationException("Failed to service handlerChain");
}
//read from the XML configuration and create and configure each of the handlers
ContainerUtil.configure(handlerChain,handlerConfiguration.getChild("handlerchain"));
} else {
mailetcontext.setAttribute(Constants.HELLO_NAME, "localhost");
}
}
/**
* @see org.apache.avalon.framework.activity.Initializable#initialize()
*/
public void initialize() throws Exception {
super.initialize();
if (!isEnabled()) {
return;
}
if (connectionLimit != null) {
theHandlerPool = new HardResourceLimitingPool(theHandlerFactory, 5, connectionLimit.intValue());
if (getLogger().isDebugEnabled()) {
getLogger().debug("Using a bounded pool for SMTP handlers with upper limit " + connectionLimit.intValue());
}
} else {
// NOTE: The maximum here is not a real maximum. The handler pool will continue to
// provide handlers beyond this value.
theHandlerPool = new DefaultPool(theHandlerFactory, null, 5, 30);
getLogger().debug("Using an unbounded pool for SMTP handlers.");
}
if (theHandlerPool instanceof LogEnabled) {
((LogEnabled)theHandlerPool).enableLogging(getLogger());
}
if (theHandlerPool instanceof Initializable) {
((Initializable)theHandlerPool).initialize();
}
theWatchdogFactory = getWatchdogFactory();
}
/**
* @see org.apache.james.core.AbstractJamesService#getDefaultPort()
*/
protected int getDefaultPort() {
return 25;
}
/**
* @see org.apache.james.core.AbstractJamesService#getServiceType()
*/
public String getServiceType() {
return "SMTP Service";
}
/**
* @see org.apache.avalon.cornerstone.services.connection.AbstractHandlerFactory#newHandler()
*/
protected ConnectionHandler newHandler()
throws Exception {
SMTPHandler theHandler = (SMTPHandler)theHandlerPool.get();
if (getLogger().isDebugEnabled()) {
getLogger().debug("Getting SMTPHandler from pool.");
}
Watchdog theWatchdog = theWatchdogFactory.getWatchdog(theHandler.getWatchdogTarget());
theHandler.setConfigurationData(theConfigData);
theHandler.setWatchdog(theWatchdog);
//pass the handler chain to every SMTPhandler
theHandler.setHandlerChain(handlerChain);
return theHandler;
}
/**
* @see org.apache.avalon.cornerstone.services.connection.ConnectionHandlerFactory#releaseConnectionHandler(ConnectionHandler)
*/
public void releaseConnectionHandler( ConnectionHandler connectionHandler ) {
if (!(connectionHandler instanceof SMTPHandler)) {
throw new IllegalArgumentException("Attempted to return non-SMTPHandler to pool.");
}
if (getLogger().isDebugEnabled()) {
getLogger().debug("Returning SMTPHandler to pool.");
}
theHandlerPool.put((Poolable)connectionHandler);
}
/**
* The factory for producing handlers.
*/
private static class SMTPHandlerFactory
implements ObjectFactory {
/**
* @see org.apache.avalon.excalibur.pool.ObjectFactory#newInstance()
*/
public Object newInstance() throws Exception {
return new SMTPHandler();
}
/**
* @see org.apache.avalon.excalibur.pool.ObjectFactory#getCreatedClass()
*/
public Class getCreatedClass() {
return SMTPHandler.class;
}
/**
* @see org.apache.avalon.excalibur.pool.ObjectFactory#decommision(Object)
*/
public void decommission( Object object ) throws Exception {
return;
}
}
/**
* A class to provide SMTP handler configuration to the handlers
*/
private class SMTPHandlerConfigurationDataImpl
implements SMTPHandlerConfigurationData {
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#getHelloName()
*/
public String getHelloName() {
return SMTPServer.this.helloName;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#getResetLength()
*/
public int getResetLength() {
return SMTPServer.this.lengthReset;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#getMaxMessageSize()
*/
public long getMaxMessageSize() {
return SMTPServer.this.maxMessageSize;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#isAuthRequired(String)
*/
public boolean isRelayingAllowed(String remoteIP) {
boolean relayingAllowed = false;
if (authorizedNetworks != null) {
relayingAllowed = SMTPServer.this.authorizedNetworks.matchInetNetwork(remoteIP);
}
return relayingAllowed;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#isAuthRequired(String)
*/
public boolean isAuthRequired(String remoteIP) {
if (SMTPServer.this.authRequired == AUTH_ANNOUNCE) return true;
boolean authRequired = SMTPServer.this.authRequired != AUTH_DISABLED;
if (authorizedNetworks != null) {
authRequired = authRequired && !SMTPServer.this.authorizedNetworks.matchInetNetwork(remoteIP);
}
return authRequired;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#isAuthRequired()
*/
public boolean isAuthRequired() {
return SMTPServer.this.authRequired != AUTH_DISABLED;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#isVerifyIdentity()
*/
public boolean isVerifyIdentity() {
return SMTPServer.this.verifyIdentity;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#getMailServer()
*/
public MailServer getMailServer() {
return SMTPServer.this.mailServer;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#getUsersRepository()
*/
public UsersRepository getUsersRepository() {
return SMTPServer.this.users;
}
/**
* @see org.apache.james.smtpserver.SMTPHandlerConfigurationData#useHeloEnforcement()
*/
public boolean useHeloEhloEnforcement() {
return SMTPServer.this.heloEhloEnforcement;
}
}
}
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