org.apache.directory.server.dhcp.protocol

Class DhcpProtocolHandler

java.lang.Object

org.apache.directory.server.dhcp.protocol.DhcpProtocolHandler

All Implemented Interfaces:

org.apache.mina.core.service.IoHandler

public class DhcpProtocolHandler
extends java.lang.Object
implements org.apache.mina.core.service.IoHandler

Implementation of a DHCP protocol handler which delegates the work of generating replys to a DhcpService implementation.

See Also:

DhcpService

Field Summary

Fields

Modifier and Type	Field and Description
static int	CLIENT_PORT Default DHCP client port
private DhcpService	dhcpService The DHCP service implementation.
private static org.slf4j.Logger	LOG
static int	SERVER_PORT Default DHCP server port

Constructor Summary

Constructors

Constructor and Description
DhcpProtocolHandler(DhcpService service)

Method Summary

Modifier and Type	Method and Description
private java.net.InetSocketAddress	determineMessageDestination(DhcpMessage request, DhcpMessage reply) Determine where to send the message: If the 'giaddr' field in a DHCP message from a client is non-zero, the server sends any return messages to the 'DHCP server' port on the BOOTP relay agent whose address appears in 'giaddr'.
void	exceptionCaught(org.apache.mina.core.session.IoSession session, java.lang.Throwable cause)
void	inputClosed(org.apache.mina.core.session.IoSession session)
private boolean	isNullAddress(java.net.InetAddress addr) Determine, whether the given address ist actually the null address "0.0.0.0".
void	messageReceived(org.apache.mina.core.session.IoSession session, java.lang.Object message)
void	messageSent(org.apache.mina.core.session.IoSession session, java.lang.Object message)
void	sessionClosed(org.apache.mina.core.session.IoSession session)
void	sessionCreated(org.apache.mina.core.session.IoSession session)
void	sessionIdle(org.apache.mina.core.session.IoSession session, org.apache.mina.core.session.IdleStatus status)
void	sessionOpened(org.apache.mina.core.session.IoSession session)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

CLIENT_PORT

public static final int CLIENT_PORT

Default DHCP client port

See Also:

Constant Field Values

SERVER_PORT

public static final int SERVER_PORT

Default DHCP server port

See Also:

Constant Field Values

dhcpService

private final DhcpService dhcpService

The DHCP service implementation. The implementation is supposed to be thread-safe.

Constructor Detail

DhcpProtocolHandler

public DhcpProtocolHandler(DhcpService service)

Method Detail

sessionCreated

public void sessionCreated(org.apache.mina.core.session.IoSession session)
                    throws java.lang.Exception

Specified by:

sessionCreated in interface org.apache.mina.core.service.IoHandler

Throws:

java.lang.Exception

sessionOpened

public void sessionOpened(org.apache.mina.core.session.IoSession session)

Specified by:

sessionOpened in interface org.apache.mina.core.service.IoHandler

sessionClosed

public void sessionClosed(org.apache.mina.core.session.IoSession session)

Specified by:

sessionClosed in interface org.apache.mina.core.service.IoHandler

sessionIdle

public void sessionIdle(org.apache.mina.core.session.IoSession session,
                        org.apache.mina.core.session.IdleStatus status)

Specified by:

sessionIdle in interface org.apache.mina.core.service.IoHandler

exceptionCaught

public void exceptionCaught(org.apache.mina.core.session.IoSession session,
                            java.lang.Throwable cause)

Specified by:

exceptionCaught in interface org.apache.mina.core.service.IoHandler

messageReceived

public void messageReceived(org.apache.mina.core.session.IoSession session,
                            java.lang.Object message)
                     throws java.lang.Exception

Specified by:

messageReceived in interface org.apache.mina.core.service.IoHandler

Throws:

java.lang.Exception

determineMessageDestination

private java.net.InetSocketAddress determineMessageDestination(DhcpMessage request,
                                                               DhcpMessage reply)

Determine where to send the message:
If the 'giaddr' field in a DHCP message from a client is non-zero, the server sends any return messages to the 'DHCP server' port on the BOOTP relay agent whose address appears in 'giaddr'. If the 'giaddr' field is zero and the 'ciaddr' field is nonzero, then the server unicasts DHCPOFFER and DHCPACK messages to the address in 'ciaddr'. If 'giaddr' is zero and 'ciaddr' is zero, and the broadcast bit is set, then the server broadcasts DHCPOFFER and DHCPACK messages to 0xffffffff. If the broadcast bit is not set and 'giaddr' is zero and 'ciaddr' is zero, then the server unicasts DHCPOFFER and DHCPACK messages to the client's hardware address and 'yiaddr' address. In all cases, when 'giaddr' is zero, the server broadcasts any DHCPNAK messages to 0xffffffff.

Parameters:

request -

reply -

Returns:

isNullAddress

private boolean isNullAddress(java.net.InetAddress addr)

Determine, whether the given address ist actually the null address "0.0.0.0".

Parameters:

relayAgentAddress -

Returns:

messageSent

public void messageSent(org.apache.mina.core.session.IoSession session,
                        java.lang.Object message)

Specified by:

messageSent in interface org.apache.mina.core.service.IoHandler

inputClosed

public void inputClosed(org.apache.mina.core.session.IoSession session)

Specified by:

inputClosed in interface org.apache.mina.core.service.IoHandler