*/
package org.opendaylight.protocol.pcep.impl;
+import static java.util.Objects.requireNonNull;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.MoreObjects;
+import com.google.common.base.MoreObjects.ToStringHelper;
+import com.google.common.base.Ticker;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
-import io.netty.util.Timeout;
-import io.netty.util.Timer;
-import io.netty.util.TimerTask;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.util.concurrent.Future;
-
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.LinkedList;
import java.util.Queue;
import java.util.concurrent.TimeUnit;
-
-import org.opendaylight.protocol.framework.AbstractProtocolSession;
+import java.util.concurrent.atomic.AtomicBoolean;
+import javax.annotation.concurrent.GuardedBy;
import org.opendaylight.protocol.pcep.PCEPCloseTermination;
import org.opendaylight.protocol.pcep.PCEPSession;
import org.opendaylight.protocol.pcep.PCEPSessionListener;
import org.opendaylight.protocol.pcep.TerminationReason;
+import org.opendaylight.protocol.pcep.impl.spi.Util;
import org.opendaylight.protocol.pcep.spi.PCEPErrors;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.CloseBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.Keepalive;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.KeepaliveBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.CloseMessage;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.KeepaliveMessage;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.OpenMessage;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.close.message.CCloseMessageBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.close.object.CCloseBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.keepalive.message.KeepaliveMessageBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.open.object.Open;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.open.object.open.Tlvs;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev181109.CloseBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev181109.Keepalive;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev181109.KeepaliveBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.pcep.session.state.LocalPref;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.pcep.session.state.Messages;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.pcep.session.state.PeerPref;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.CloseMessage;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.KeepaliveMessage;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Message;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.OpenMessage;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.PcerrMessage;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.close.message.CCloseMessageBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.close.object.CCloseBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.keepalive.message.KeepaliveMessageBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.open.object.Open;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.open.object.open.Tlvs;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import com.google.common.annotations.VisibleForTesting;
-import com.google.common.base.Objects;
-import com.google.common.base.Objects.ToStringHelper;
-import com.google.common.base.Preconditions;
-
/**
* Implementation of PCEPSession. (Not final for testing.)
*/
@VisibleForTesting
-public class PCEPSessionImpl extends AbstractProtocolSession<Message> implements PCEPSession, PCEPSessionRuntimeMXBean {
- /**
- * System.nanoTime value about when was sent the last message Protected to be updated also in tests.
- */
- protected volatile long lastMessageSentAt;
-
- /**
- * System.nanoTime value about when was received the last message
- */
- private long lastMessageReceivedAt;
-
- /**
- * Protected for testing.
- */
- protected int maxUnknownMessages;
-
- protected final Queue<Long> unknownMessagesTimes = new LinkedList<Long>();
-
- private final PCEPSessionListener listener;
-
- /**
- * Open Object with session characteristics that were accepted by another PCE (sent from this session).
- */
- private final Open localOpen;
-
- /**
- * Open Object with session characteristics for this session (sent from another PCE).
- */
- private final Open remoteOpen;
-
- private static final Logger logger = LoggerFactory.getLogger(PCEPSessionImpl.class);
-
- /**
- * Timer object grouping FSM Timers
- */
- private final Timer stateTimer;
-
- private int sentMsgCount = 0;
-
- private int receivedMsgCount = 0;
-
- // True if the listener should not be notified about events
- private boolean closed = false;
-
- private final Channel channel;
-
- private final Keepalive kaMessage = new KeepaliveBuilder().setKeepaliveMessage(new KeepaliveMessageBuilder().build()).build();
-
- PCEPSessionImpl(final Timer timer, final PCEPSessionListener listener, final int maxUnknownMessages, final Channel channel,
- final Open localOpen, final Open remoteOpen) {
- this.listener = Preconditions.checkNotNull(listener);
- this.stateTimer = Preconditions.checkNotNull(timer);
- this.channel = Preconditions.checkNotNull(channel);
- this.localOpen = Preconditions.checkNotNull(localOpen);
- this.remoteOpen = Preconditions.checkNotNull(remoteOpen);
- this.lastMessageReceivedAt = System.nanoTime();
-
- if (this.maxUnknownMessages != 0) {
- this.maxUnknownMessages = maxUnknownMessages;
- }
-
- if (getDeadTimerValue() != 0) {
- this.stateTimer.newTimeout(new TimerTask() {
- @Override
- public void run(final Timeout timeout) throws Exception {
- handleDeadTimer();
- }
- }, getDeadTimerValue(), TimeUnit.SECONDS);
- }
-
- if (getKeepAliveTimerValue() != 0) {
- this.stateTimer.newTimeout(new TimerTask() {
- @Override
- public void run(final Timeout timeout) throws Exception {
- handleKeepaliveTimer();
- }
- }, getKeepAliveTimerValue(), TimeUnit.SECONDS);
- }
-
- logger.debug("Session started.");
- }
-
- /**
- * If DeadTimer expires, the session ends. If a message (whichever) was received during this period, the DeadTimer
- * will be rescheduled by DEAD_TIMER_VALUE + the time that has passed from the start of the DeadTimer to the time at
- * which the message was received. If the session was closed by the time this method starts to execute (the session
- * state will become IDLE), that rescheduling won't occur.
- */
- private synchronized void handleDeadTimer() {
- final long ct = System.nanoTime();
-
- final long nextDead = this.lastMessageReceivedAt + TimeUnit.SECONDS.toNanos(getDeadTimerValue());
-
- if (this.channel.isActive()) {
- if (ct >= nextDead) {
- logger.debug("DeadTimer expired. " + new Date());
- this.terminate(TerminationReason.ExpDeadtimer);
- } else {
- this.stateTimer.newTimeout(new TimerTask() {
- @Override
- public void run(final Timeout timeout) throws Exception {
- handleDeadTimer();
- }
- }, nextDead - ct, TimeUnit.NANOSECONDS);
- }
- }
- }
-
- /**
- * If KeepAlive Timer expires, sends KeepAlive message. If a message (whichever) was send during this period, the
- * KeepAlive Timer will be rescheduled by KEEP_ALIVE_TIMER_VALUE + the time that has passed from the start of the
- * KeepAlive timer to the time at which the message was sent. If the session was closed by the time this method
- * starts to execute (the session state will become IDLE), that rescheduling won't occur.
- */
- private synchronized void handleKeepaliveTimer() {
- final long ct = System.nanoTime();
-
- long nextKeepalive = this.lastMessageSentAt + TimeUnit.SECONDS.toNanos(getKeepAliveTimerValue());
-
- if (this.channel.isActive()) {
- if (ct >= nextKeepalive) {
- this.sendMessage(this.kaMessage);
- nextKeepalive = this.lastMessageSentAt + TimeUnit.SECONDS.toNanos(getKeepAliveTimerValue());
- }
-
- this.stateTimer.newTimeout(new TimerTask() {
- @Override
- public void run(final Timeout timeout) throws Exception {
- handleKeepaliveTimer();
- }
- }, nextKeepalive - ct, TimeUnit.NANOSECONDS);
- }
- }
-
- /**
- * Sends message to serialization.
- *
- * @param msg to be sent
- */
- @Override
- public Future<Void> sendMessage(final Message msg) {
- final ChannelFuture f = this.channel.writeAndFlush(msg);
- this.lastMessageSentAt = System.nanoTime();
- if (!(msg instanceof KeepaliveMessage)) {
- logger.debug("Message enqueued: {}", msg);
- }
- this.sentMsgCount++;
-
- f.addListener(new ChannelFutureListener() {
- @Override
- public void operationComplete(final ChannelFuture arg) {
- if (arg.isSuccess()) {
- logger.debug("Message sent to socket: {}", msg);
- } else {
- logger.debug("Message not sent: {}", msg, arg.cause());
- }
- }
- });
-
- return f;
- }
-
- /**
- * Closes PCEP session without sending a Close message, as the channel is no longer active.
- */
- @Override
- public void close() {
- logger.trace("Closing session: {}", this);
- this.channel.close();
- }
-
- /**
- * Closes PCEP session, cancels all timers, returns to state Idle, sends the Close Message. KeepAlive and DeadTimer
- * are cancelled if the state of the session changes to IDLE. This method is used to close the PCEP session from
- * inside the session or from the listener, therefore the parent of this session should be informed.
- */
- @Override
- public synchronized void close(final TerminationReason reason) {
- logger.debug("Closing session: {}", this);
- this.closed = true;
- this.sendMessage(new CloseBuilder().setCCloseMessage(
- new CCloseMessageBuilder().setCClose(new CCloseBuilder().setReason(reason.getShortValue()).build()).build()).build());
- this.channel.close();
- }
-
- @Override
- public Tlvs getRemoteTlvs() {
- return this.remoteOpen.getTlvs();
- }
-
- @Override
- public InetAddress getRemoteAddress() {
- return ((InetSocketAddress) this.channel.remoteAddress()).getAddress();
- }
-
- private synchronized void terminate(final TerminationReason reason) {
- this.listener.onSessionTerminated(this, new PCEPCloseTermination(reason));
- this.closed = true;
- this.sendMessage(new CloseBuilder().setCCloseMessage(
- new CCloseMessageBuilder().setCClose(new CCloseBuilder().setReason(reason.getShortValue()).build()).build()).build());
- this.close();
- }
-
- @Override
- public synchronized void endOfInput() {
- if (!this.closed) {
- this.listener.onSessionDown(this, new IOException("End of input detected. Close the session."));
- this.closed = true;
- }
- }
-
- private void sendErrorMessage(final PCEPErrors value) {
- this.sendErrorMessage(value, null);
- }
-
- /**
- * Sends PCEP Error Message with one PCEPError and Open Object.
- *
- * @param value
- * @param open
- */
- private void sendErrorMessage(final PCEPErrors value, final Open open) {
- this.sendMessage(Util.createErrorMessage(value, open));
- }
-
- /**
- * The fact, that a message is malformed, comes from parser. In case of unrecognized message a particular error is
- * sent (CAPABILITY_NOT_SUPPORTED) and the method checks if the MAX_UNKNOWN_MSG per minute wasn't overstepped.
- * Second, any other error occurred that is specified by rfc. In this case, the an error message is generated and
- * sent.
- *
- * @param error documented error in RFC5440 or draft
- */
- @VisibleForTesting
- public void handleMalformedMessage(final PCEPErrors error) {
- final long ct = System.nanoTime();
- this.sendErrorMessage(error);
- if (error == PCEPErrors.CAPABILITY_NOT_SUPPORTED) {
- this.unknownMessagesTimes.add(ct);
- while (ct - this.unknownMessagesTimes.peek() > 60 * 1E9) {
- this.unknownMessagesTimes.poll();
- }
- if (this.unknownMessagesTimes.size() > this.maxUnknownMessages) {
- this.terminate(TerminationReason.TooManyUnknownMsg);
- }
- }
- }
-
- /**
- * Handles incoming message. If the session is up, it notifies the user. The user is notified about every message
- * except KeepAlive.
- *
- * @param msg incoming message
- */
- @Override
- public void handleMessage(final Message msg) {
- // Update last reception time
- this.lastMessageReceivedAt = System.nanoTime();
- this.receivedMsgCount++;
-
- // Internal message handling. The user does not see these messages
- if (msg instanceof KeepaliveMessage) {
- // Do nothing, the timer has been already reset
- } else if (msg instanceof OpenMessage) {
- this.sendErrorMessage(PCEPErrors.ATTEMPT_2ND_SESSION);
- } else if (msg instanceof CloseMessage) {
- /*
- * Session is up, we are reporting all messages to user. One notable
- * exception is CLOSE message, which needs to be converted into a
- * session DOWN event.
- */
- this.close();
- } else {
- // This message needs to be handled by the user
- this.listener.onMessage(this, msg);
- }
- }
-
- /**
- * @return the sentMsgCount
- */
-
- @Override
- public Integer getSentMsgCount() {
- return this.sentMsgCount;
- }
-
- /**
- * @return the receivedMsgCount
- */
-
- @Override
- public Integer getReceivedMsgCount() {
- return this.receivedMsgCount;
- }
-
- @Override
- public Integer getDeadTimerValue() {
- return new Integer(this.remoteOpen.getDeadTimer());
- }
-
- @Override
- public Integer getKeepAliveTimerValue() {
- return new Integer(this.localOpen.getKeepalive());
- }
-
- @Override
- public String getPeerAddress() {
- final InetSocketAddress a = (InetSocketAddress) this.channel.remoteAddress();
- return a.getHostName();
- }
-
- @Override
- public void tearDown() {
- this.close();
- }
-
- @Override
- public final String toString() {
- return addToStringAttributes(Objects.toStringHelper(this)).toString();
- }
-
- protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
- toStringHelper.add("localOpen", this.localOpen);
- toStringHelper.add("remoteOpen", this.remoteOpen);
- return toStringHelper;
- }
-
- @Override
- protected void sessionUp() {
- this.listener.onSessionUp(this);
- }
-
- @Override
- public String getNodeIdentifier() {
- if (this.remoteOpen.getTlvs() == null) {
- if (this.remoteOpen.getTlvs().getPredundancyGroupId() != null) {
- return new String(this.remoteOpen.getTlvs().getPredundancyGroupId().getIdentifier());
- }
- }
- return "";
- }
-
+public class PCEPSessionImpl extends SimpleChannelInboundHandler<Message> implements PCEPSession {
+ private static final long MINUTE = TimeUnit.MINUTES.toNanos(1);
+ private static Ticker TICKER = Ticker.systemTicker();
+ /**
+ * System.nanoTime value about when was sent the last message Protected to be updated also in tests.
+ */
+ private volatile long lastMessageSentAt;
+
+ /**
+ * System.nanoTime value about when was received the last message
+ */
+ private long lastMessageReceivedAt;
+
+ private final Queue<Long> unknownMessagesTimes = new LinkedList<>();
+
+ private final PCEPSessionListener listener;
+
+ /**
+ * Open Object with session characteristics that were accepted by another PCE (sent from this session).
+ */
+ private final Open localOpen;
+
+ /**
+ * Open Object with session characteristics for this session (sent from another PCE).
+ */
+ private final Open remoteOpen;
+
+ private static final Logger LOG = LoggerFactory.getLogger(PCEPSessionImpl.class);
+
+ private int maxUnknownMessages;
+
+ // True if the listener should not be notified about events
+ @GuardedBy("this")
+ private final AtomicBoolean closed = new AtomicBoolean(false);
+
+ private final Channel channel;
+
+ private final Keepalive kaMessage = new KeepaliveBuilder().setKeepaliveMessage(new KeepaliveMessageBuilder().build()).build();
+
+ private final PCEPSessionState sessionState;
+
+ PCEPSessionImpl(final PCEPSessionListener listener, final int maxUnknownMessages, final Channel channel,
+ final Open localOpen, final Open remoteOpen) {
+ this.listener = requireNonNull(listener);
+ this.channel = requireNonNull(channel);
+ this.localOpen = requireNonNull(localOpen);
+ this.remoteOpen = requireNonNull(remoteOpen);
+ this.lastMessageReceivedAt = TICKER.read();
+
+ if (maxUnknownMessages != 0) {
+ this.maxUnknownMessages = maxUnknownMessages;
+ }
+
+
+ if (getDeadTimerValue() != 0) {
+ channel.eventLoop().schedule(this::handleDeadTimer, getDeadTimerValue(), TimeUnit.SECONDS);
+ }
+
+ if (getKeepAliveTimerValue() != 0) {
+ channel.eventLoop().schedule(this::handleKeepaliveTimer, getKeepAliveTimerValue(), TimeUnit.SECONDS);
+ }
+
+ LOG.info("Session {}[{}] <-> {}[{}] started", channel.localAddress(), localOpen.getSessionId(), channel.remoteAddress(),
+ remoteOpen.getSessionId());
+ this.sessionState = new PCEPSessionState(remoteOpen, localOpen, channel);
+ }
+
+ public final Integer getKeepAliveTimerValue() {
+ return this.localOpen.getKeepalive().intValue();
+ }
+
+ public final Integer getDeadTimerValue() {
+ return this.remoteOpen.getDeadTimer().intValue();
+ }
+
+ /**
+ * If DeadTimer expires, the session ends. If a message (whichever) was received during this period, the DeadTimer
+ * will be rescheduled by DEAD_TIMER_VALUE + the time that has passed from the start of the DeadTimer to the time at
+ * which the message was received. If the session was closed by the time this method starts to execute (the session
+ * state will become IDLE), that rescheduling won't occur.
+ */
+ private synchronized void handleDeadTimer() {
+ final long ct = TICKER.read();
+
+ final long nextDead = this.lastMessageReceivedAt + TimeUnit.SECONDS.toNanos(getDeadTimerValue());
+
+ if (this.channel.isActive()) {
+ if (ct >= nextDead) {
+ LOG.debug("DeadTimer expired. {}", new Date());
+ this.terminate(TerminationReason.EXP_DEADTIMER);
+ } else {
+ this.channel.eventLoop().schedule(this::handleDeadTimer, nextDead - ct, TimeUnit.NANOSECONDS);
+ }
+ }
+ }
+
+ /**
+ * If KeepAlive Timer expires, sends KeepAlive message. If a message (whichever) was send during this period, the
+ * KeepAlive Timer will be rescheduled by KEEP_ALIVE_TIMER_VALUE + the time that has passed from the start of the
+ * KeepAlive timer to the time at which the message was sent. If the session was closed by the time this method
+ * starts to execute (the session state will become IDLE), that rescheduling won't occur.
+ */
+ private void handleKeepaliveTimer() {
+ final long ct = TICKER.read();
+
+ long nextKeepalive = this.lastMessageSentAt + TimeUnit.SECONDS.toNanos(getKeepAliveTimerValue());
+
+ if (this.channel.isActive()) {
+ if (ct >= nextKeepalive) {
+ this.sendMessage(this.kaMessage);
+ nextKeepalive = this.lastMessageSentAt + TimeUnit.SECONDS.toNanos(getKeepAliveTimerValue());
+ }
+
+ this.channel.eventLoop().schedule(this::handleKeepaliveTimer, nextKeepalive - ct, TimeUnit.NANOSECONDS);
+ }
+ }
+
+ /**
+ * Handle exception occurred in the PCEP session. The session in error state should be closed
+ * properly so that it can be restored later.
+ */
+ @VisibleForTesting
+ void handleException(final Throwable cause) {
+ LOG.error("Exception captured for session {}, closing session.", this, cause);
+ terminate(TerminationReason.UNKNOWN);
+ }
+
+ /**
+ * Sends message to serialization.
+ *
+ * @param msg to be sent
+ */
+ @Override
+ public Future<Void> sendMessage(final Message msg) {
+ final ChannelFuture f = this.channel.writeAndFlush(msg);
+ this.lastMessageSentAt = TICKER.read();
+ this.sessionState.updateLastSentMsg();
+ if (!(msg instanceof KeepaliveMessage)) {
+ LOG.debug("PCEP Message enqueued: {}", msg);
+ }
+ if (msg instanceof PcerrMessage) {
+ this.sessionState.setLastSentError(msg);
+ }
+
+ f.addListener((ChannelFutureListener) arg -> {
+ if (arg.isSuccess()) {
+ LOG.trace("Message sent to socket: {}", msg);
+ } else {
+ LOG.debug("Message not sent: {}", msg, arg.cause());
+ }
+ });
+
+ return f;
+ }
+
+ @VisibleForTesting
+ ChannelFuture closeChannel() {
+ LOG.info("Closing PCEP session channel: {}", this.channel);
+ return this.channel.close();
+ }
+
+ @VisibleForTesting
+ public synchronized boolean isClosed() {
+ return this.closed.get();
+ }
+
+ /**
+ * Closes PCEP session without sending a Close message, as the channel is no longer active.
+ */
+ @Override
+ public synchronized void close() {
+ close(null);
+ }
+
+ /**
+ * Closes PCEP session, cancels all timers, returns to state Idle, sends the Close Message. KeepAlive and DeadTimer
+ * are cancelled if the state of the session changes to IDLE. This method is used to close the PCEP session from
+ * inside the session or from the listener, therefore the parent of this session should be informed.
+ */
+ @Override
+ public void close(final TerminationReason reason) {
+ if (this.closed.getAndSet(true)) {
+ LOG.debug("Session is already closed.");
+ return;
+ }
+ // only send close message when the reason is provided
+ if (reason != null) {
+ LOG.info("Closing PCEP session with reason {}: {}", reason, this);
+ sendMessage(new CloseBuilder().setCCloseMessage(
+ new CCloseMessageBuilder().setCClose(new CCloseBuilder().setReason(reason.getShortValue()).build()).build()).build());
+ } else {
+ LOG.info("Closing PCEP session: {}", this);
+ }
+ closeChannel();
+ }
+
+ @Override
+ public Tlvs getRemoteTlvs() {
+ return this.remoteOpen.getTlvs();
+ }
+
+ @Override
+ public InetAddress getRemoteAddress() {
+ return ((InetSocketAddress) this.channel.remoteAddress()).getAddress();
+ }
+
+ private synchronized void terminate(final TerminationReason reason) {
+ if (this.closed.get()) {
+ LOG.debug("Session {} is already closed.", this);
+ return;
+ }
+ close(reason);
+ this.listener.onSessionTerminated(this, new PCEPCloseTermination(reason));
+ }
+
+ synchronized void endOfInput() {
+ if (!this.closed.getAndSet(true)) {
+ this.listener.onSessionDown(this, new IOException("End of input detected. Close the session."));
+ }
+ }
+
+ private void sendErrorMessage(final PCEPErrors value) {
+ this.sendErrorMessage(value, null);
+ }
+
+ /**
+ * Sends PCEP Error Message with one PCEPError and Open Object.
+ *
+ * @param value
+ * @param open
+ */
+ private void sendErrorMessage(final PCEPErrors value, final Open open) {
+ this.sendMessage(Util.createErrorMessage(value, open));
+ }
+
+ /**
+ * The fact, that a message is malformed, comes from parser. In case of unrecognized message a particular error is
+ * sent (CAPABILITY_NOT_SUPPORTED) and the method checks if the MAX_UNKNOWN_MSG per minute wasn't overstepped.
+ * Second, any other error occurred that is specified by rfc. In this case, the an error message is generated and
+ * sent.
+ *
+ * @param error documented error in RFC5440 or draft
+ */
+ @VisibleForTesting
+ void handleMalformedMessage(final PCEPErrors error) {
+ final long ct = TICKER.read();
+ this.sendErrorMessage(error);
+ if (error == PCEPErrors.CAPABILITY_NOT_SUPPORTED) {
+ this.unknownMessagesTimes.add(ct);
+ while (ct - this.unknownMessagesTimes.peek() > MINUTE) {
+ final Long poll = this.unknownMessagesTimes.poll();
+ }
+ if (this.unknownMessagesTimes.size() > this.maxUnknownMessages) {
+ this.terminate(TerminationReason.TOO_MANY_UNKNOWN_MSGS);
+ }
+ }
+ }
+
+ /**
+ * Handles incoming message. If the session is up, it notifies the user. The user is notified about every message
+ * except KeepAlive.
+ *
+ * @param msg incoming message
+ */
+ public synchronized void handleMessage(final Message msg) {
+ if (this.closed.get()) {
+ LOG.debug("PCEP Session {} is already closed, skip handling incoming message {}", this, msg);
+ return;
+ }
+ // Update last reception time
+ this.lastMessageReceivedAt = TICKER.read();
+ this.sessionState.updateLastReceivedMsg();
+ if (!(msg instanceof KeepaliveMessage)) {
+ LOG.debug("PCEP message {} received.", msg);
+ }
+ // Internal message handling. The user does not see these messages
+ if (msg instanceof KeepaliveMessage) {
+ // Do nothing, the timer has been already reset
+ } else if (msg instanceof OpenMessage) {
+ this.sendErrorMessage(PCEPErrors.ATTEMPT_2ND_SESSION);
+ } else if (msg instanceof CloseMessage) {
+ /*
+ * Session is up, we are reporting all messages to user. One notable
+ * exception is CLOSE message, which needs to be converted into a
+ * session DOWN event.
+ */
+ close();
+ this.listener.onSessionTerminated(this, new PCEPCloseTermination(TerminationReason
+ .forValue(((CloseMessage) msg).getCCloseMessage().getCClose().getReason())));
+ } else {
+ // This message needs to be handled by the user
+ if (msg instanceof PcerrMessage) {
+ this.sessionState.setLastReceivedError(msg);
+ }
+ this.listener.onMessage(this, msg);
+ }
+ }
+
+ @Override
+ public final String toString() {
+ return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
+ }
+
+ private ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
+ toStringHelper.add("channel", this.channel);
+ toStringHelper.add("localOpen", this.localOpen);
+ toStringHelper.add("remoteOpen", this.remoteOpen);
+ return toStringHelper;
+ }
+
+ @VisibleForTesting
+ void sessionUp() {
+ try {
+ this.listener.onSessionUp(this);
+ } catch (final Exception e) {
+ handleException(e);
+ throw e;
+ }
+ }
+
+ @VisibleForTesting
+ final Queue<Long> getUnknownMessagesTimes() {
+ return this.unknownMessagesTimes;
+ }
+
+ @Override
+ public Messages getMessages() {
+ return this.sessionState.getMessages(this.unknownMessagesTimes.size());
+ }
+
+ @Override
+ public LocalPref getLocalPref() {
+ return this.sessionState.getLocalPref();
+ }
+
+ @Override
+ public PeerPref getPeerPref() {
+ return this.sessionState.getPeerPref();
+ }
+
+ @Override
+ public Open getLocalOpen() {
+ return this.sessionState.getLocalOpen();
+ }
+
+ @Override
+ public synchronized final void channelInactive(final ChannelHandlerContext ctx) {
+ LOG.debug("Channel {} inactive.", ctx.channel());
+ endOfInput();
+
+ try {
+ super.channelInactive(ctx);
+ } catch (final Exception e) {
+ throw new IllegalStateException("Failed to delegate channel inactive event on channel " + ctx.channel(), e);
+ }
+ }
+
+ @Override
+ protected synchronized final void channelRead0(final ChannelHandlerContext ctx, final Message msg) {
+ LOG.debug("Message was received: {}", msg);
+ handleMessage(msg);
+ }
+
+ @Override
+ public synchronized final void handlerAdded(final ChannelHandlerContext ctx) {
+ this.sessionUp();
+ }
+
+ @Override
+ public synchronized void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause) {
+ handleException(cause);
+ }
+
+ @Override
+ public Tlvs getLocalTlvs() {
+ return this.localOpen.getTlvs();
+ }
+
+ @VisibleForTesting
+ static void setTicker(final Ticker ticker) {
+ TICKER = ticker;
+ }
}
Code Review / bgpcep.git / blobdiff