smtp_relayserver
Class SMTPHostFinder

java.lang.Object
  |
  +--smtp_relayserver.SMTPHostFinder

public class SMTPHostFinder

extends java.lang.Object

This class allows you to find for passed host name the associated SMTP host either as IP address or as host name.

Copyright (C) 1998 Valentin Koch

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

Constructor Summary

SMTPHostFinder(java.lang.String nameServer1, java.lang.String nameServer2)
Creates a new SMTPHostFinder.

Method Summary

java.net.InetAddress	getAddress(java.lang.String remoteHost)
java.lang.String	getHostName(java.lang.String remoteHost)

Methods inherited from class java.lang.Object

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

Constructor Detail

SMTPHostFinder

public SMTPHostFinder(java.lang.String nameServer1,
                      java.lang.String nameServer2)

Creates a new SMTPHostFinder.

Parameters:

nameServer1 - The first domain name server which should be used

nameServer2 - The second domain name server which should be used

Method Detail

getAddress

public java.net.InetAddress getAddress(java.lang.String remoteHost)
                                throws java.net.UnknownHostException,
                                       TimeoutException,
                                       NameServerException

Parameters:

remoteHost - The host name of the domain zone where the expected SMTP host is

Returns:

The IP Address of the SMTP host as InetAddress

Throws:

java.net.UnknownHostException - The required host is unknown

TimeoutException - The name server did not respond in the given time

NameServerException - The name server had an error

getHostName

public java.lang.String getHostName(java.lang.String remoteHost)
                             throws java.net.UnknownHostException,
                                    TimeoutException,
                                    NameServerException

Parameters:

remoteHost - The host name of the domain zone where the expected SMTP host is

Returns:

The host name of the SMTP host as String

Throws:

java.net.UnknownHostException - The required host is unknown

TimeoutException - The name server did not respond in the given time

NameServerException - The name server had an error