org.subethamail.smtp.internal.server

Class ConcurrentSessionsBySourceLimiter

java.lang.Object

org.subethamail.smtp.internal.server.ConcurrentSessionsBySourceLimiter

All Implemented Interfaces:

SessionHandler

public final class ConcurrentSessionsBySourceLimiter
extends Object
implements SessionHandler

A SessionHandler to track and limit connection counts by remote addresses.

Author:

Diego Salvi

Nested Class Summary

Nested classes/interfaces inherited from interface org.subethamail.smtp.server.SessionHandler

SessionHandler.SessionAcceptance

Constructor Summary

Constructors

Constructor and Description
ConcurrentSessionsBySourceLimiter(int maxConnectionsPerSource) Create a new ConcurrentSessionsBySourceLimiter with default reject message: "421 Too many connections, try again later".
ConcurrentSessionsBySourceLimiter(int maxConnectionsPerSource, int code, String message) Create a new ConcurrentSessionsBySourceLimiter with custom reject message

Method Summary

Modifier and Type	Method and Description
SessionHandler.SessionAcceptance	accept(Session session) This method is invoked on a session creation, before sending the SMTP greeting and can react rejecting the session.
void	onSessionEnd(Session session) This method is invoked on session close.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.subethamail.smtp.server.SessionHandler

acceptAll, limitConcurrentSessionsBySource

Constructor Detail

ConcurrentSessionsBySourceLimiter

public ConcurrentSessionsBySourceLimiter(int maxConnectionsPerSource)

Create a new ConcurrentSessionsBySourceLimiter with default reject message: "421 Too many connections, try again later".

Parameters:

maxConnectionsPerSource - maximum number of concurrent connection per remote source ip

ConcurrentSessionsBySourceLimiter

public ConcurrentSessionsBySourceLimiter(int maxConnectionsPerSource,
                                         int code,
                                         String message)

Create a new ConcurrentSessionsBySourceLimiter with custom reject message

Parameters:

maxConnectionsPerSource - maximum number of concurrent connection per remote source ip

code - SMTP code

message - SMTP message

Method Detail

accept

public SessionHandler.SessionAcceptance accept(Session session)

Description copied from interface: SessionHandler

This method is invoked on a session creation, before sending the SMTP greeting and can react rejecting the session.

Rejected session will be closed and no method SessionHandler.onSessionEnd(Session) will be invoked.

Specified by:

accept in interface SessionHandler

Parameters:

session - newly created session (should never be null)

Returns:

starting session result event, can allow or reject the newly created session

onSessionEnd

public void onSessionEnd(Session session)

Description copied from interface: SessionHandler

This method is invoked on session close.

Specified by:

onSessionEnd in interface SessionHandler

Parameters:

session - closing session