Package org.opendaylight.protocol.pcep.impl

Class AbstractPCEPSessionNegotiator

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

org.opendaylight.protocol.pcep.impl.AbstractSessionNegotiator

org.opendaylight.protocol.pcep.impl.AbstractPCEPSessionNegotiator

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler, SessionNegotiator

Direct Known Subclasses:

DefaultPCEPSessionNegotiator

public abstract class AbstractPCEPSessionNegotiator
extends AbstractSessionNegotiator

Abstract PCEP session negotiator. Takes care of basic handshake without implementing a specific policy. Policies need to be provided by a specific subclass.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	AbstractPCEPSessionNegotiator.State	PCEP session negotiation state transitions are described in RFC5440.

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

io.netty.channel.ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field	Description
static final int	FAIL_TIMER_VALUE	Unified KeepWait and OpenWait timer expiration, in seconds.

Fields inherited from class org.opendaylight.protocol.pcep.impl.AbstractSessionNegotiator

channel, promise

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractPCEPSessionNegotiator(io.netty.util.concurrent.Promise<PCEPSession> promise, io.netty.channel.Channel channel, PcepSessionTls tlsConfiguration)

Method Summary

Modifier and Type	Method	Description
protected abstract PCEPSessionImpl	createSession(io.netty.channel.Channel channel, Open localPrefs, Open remotePrefs)	Create the protocol session.
protected abstract Open	getCounterProposal(Open proposal)	Given a peer-provided session parameters proposal which we found unacceptable, provide a counter-proposal.
protected abstract Open	getInitialProposal()	Get the initial session parameters proposal.
protected abstract Open	getRevisedProposal(Open suggestion)	Get the revised session parameters proposal based on the feedback the peer has provided to us.
protected final void	handleMessage(Message msg)
protected abstract boolean	isProposalAcceptable(Open proposal)	Check whether a peer-provided session parameters proposal is acceptable.
protected void	negotiationFailed(Throwable cause)
protected final void	startNegotiation()

Methods inherited from class org.opendaylight.protocol.pcep.impl.AbstractSessionNegotiator

channelActive, channelRead, exceptionCaught, negotiationSuccessful, sendMessage

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, userEventTriggered

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.channel.ChannelHandler

handlerAdded, handlerRemoved

Methods inherited from interface io.netty.channel.ChannelInboundHandler

channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, userEventTriggered

Field Details

FAIL_TIMER_VALUE

public static final int FAIL_TIMER_VALUE

Unified KeepWait and OpenWait timer expiration, in seconds.

See Also:

• Constant Field Values

Constructor Details

AbstractPCEPSessionNegotiator

protected AbstractPCEPSessionNegotiator(io.netty.util.concurrent.Promise<PCEPSession> promise,
 io.netty.channel.Channel channel,
 PcepSessionTls tlsConfiguration)

Method Details

getInitialProposal

protected abstract Open getInitialProposal()

Get the initial session parameters proposal.

Returns:

Session parameters proposal.

getRevisedProposal

protected abstract Open getRevisedProposal(Open suggestion)

Get the revised session parameters proposal based on the feedback the peer has provided to us.

Parameters:

suggestion - Peer-provided suggested session parameters

Returns:

Session parameters proposal, or null if peers session parameters preclude us from suggesting anything

isProposalAcceptable

protected abstract boolean isProposalAcceptable(Open proposal)

Check whether a peer-provided session parameters proposal is acceptable.

Parameters:

proposal - peer-proposed session parameters

Returns:

true if the proposal is acceptable, false otherwise

getCounterProposal

protected abstract Open getCounterProposal(Open proposal)

Given a peer-provided session parameters proposal which we found unacceptable, provide a counter-proposal. The requirement is that the isProposalAcceptable() method has to return true when presented with this proposal.

Parameters:

proposal - unacceptable peer proposal

Returns:

our counter-proposal, or null if there is no way to negotiate an acceptable proposal

createSession

protected abstract PCEPSessionImpl createSession(io.netty.channel.Channel channel,
 Open localPrefs,
 Open remotePrefs)

Create the protocol session.

Parameters:

channel - Underlying channel.

localPrefs - Session preferences proposed by us and accepted by the peer.

remotePrefs - Session preferences proposed by the peer and accepted by us.

Returns:

New protocol session.

startNegotiation

protected final void startNegotiation()

Specified by:

startNegotiation in class AbstractSessionNegotiator

handleMessage

protected final void handleMessage(Message msg)

Specified by:

handleMessage in class AbstractSessionNegotiator

negotiationFailed

protected void negotiationFailed(Throwable cause)

Overrides:

negotiationFailed in class AbstractSessionNegotiator