2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.protocol.pcep.impl;
10 import com.google.common.base.Optional;
11 import com.google.common.primitives.UnsignedBytes;
12 import io.netty.channel.Channel;
13 import io.netty.channel.ChannelFuture;
14 import io.netty.channel.ChannelFutureListener;
15 import io.netty.util.concurrent.Promise;
16 import java.net.InetSocketAddress;
17 import java.util.Comparator;
18 import java.util.concurrent.ExecutionException;
19 import org.opendaylight.protocol.pcep.PCEPPeerProposal;
20 import org.opendaylight.protocol.pcep.PCEPSessionListenerFactory;
21 import org.opendaylight.protocol.pcep.impl.PCEPPeerRegistry.SessionReference;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
26 public class PCEPSessionNegotiator extends AbstractSessionNegotiator {
28 private static final Logger LOG = LoggerFactory.getLogger(PCEPSessionNegotiator.class);
30 private static final Comparator<byte[]> COMPARATOR = UnsignedBytes.lexicographicalComparator();
32 private final PCEPSessionListenerFactory factory;
34 private final AbstractPCEPSessionNegotiatorFactory negFactory;
35 private final PCEPPeerProposal peerProposal;
37 public PCEPSessionNegotiator(final Channel channel, final Promise<PCEPSessionImpl> promise, final PCEPSessionListenerFactory factory,
38 final AbstractPCEPSessionNegotiatorFactory negFactory, final PCEPPeerProposal peerProposal) {
39 super(promise, channel);
40 this.factory = factory;
41 this.negFactory = negFactory;
42 this.peerProposal = peerProposal;
46 protected void startNegotiation() throws ExecutionException {
47 final Object lock = this;
49 LOG.debug("Bootstrap negotiation for channel {} started", this.channel);
52 * We have a chance to see if there's a client session already
53 * registered for this client.
55 final byte[] clientAddress = ((InetSocketAddress) this.channel.remoteAddress()).getAddress().getAddress();
56 final PCEPPeerRegistry sessionReg = this.negFactory.getSessionRegistry();
59 if (sessionReg.getSessionReference(clientAddress).isPresent()) {
60 final byte[] serverAddress = ((InetSocketAddress) this.channel.localAddress()).getAddress().getAddress();
61 if (COMPARATOR.compare(serverAddress, clientAddress) > 0) {
62 final Optional<SessionReference> sessionRefMaybe = sessionReg.removeSessionReference(clientAddress);
64 if (sessionRefMaybe.isPresent()) {
65 sessionRefMaybe.get().close();
67 } catch (final Exception e) {
68 LOG.error("Unexpected failure to close old session", e);
71 negotiationFailed(new IllegalStateException("A conflicting session for address "
72 + ((InetSocketAddress) this.channel.remoteAddress()).getAddress() + " found."));
77 final Short sessionId = sessionReg.nextSession(clientAddress);
78 final AbstractPCEPSessionNegotiator n = this.negFactory.createNegotiator(this.promise, this.factory.getSessionListener(),
79 this.channel, sessionId, this.peerProposal);
81 sessionReg.putSessionReference(clientAddress, new SessionReference() {
83 public void close() throws ExecutionException {
85 sessionReg.releaseSession(clientAddress, sessionId);
87 PCEPSessionNegotiator.this.channel.close();
92 public Short getSessionId() {
97 this.channel.closeFuture().addListener((ChannelFutureListener) future -> {
99 sessionReg.removeSessionReference(clientAddress);
103 LOG.info("Replacing bootstrap negotiator for channel {}", this.channel);
104 this.channel.pipeline().replace(this, "negotiator", n);
105 n.startNegotiation();
110 protected void handleMessage(final Message msg) {
111 throw new IllegalStateException("Bootstrap negotiator should have been replaced");