2 * Copyright (c) 2013 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.netconf.impl;
10 import com.google.common.base.Preconditions;
11 import com.google.common.collect.ImmutableMap;
12 import org.opendaylight.netconf.api.DocumentedException;
13 import org.opendaylight.netconf.api.NetconfMessage;
14 import org.opendaylight.netconf.api.NetconfSessionListener;
15 import org.opendaylight.netconf.api.NetconfTerminationReason;
16 import org.opendaylight.netconf.api.monitoring.NetconfMonitoringService;
17 import org.opendaylight.netconf.api.monitoring.SessionEvent;
18 import org.opendaylight.netconf.api.monitoring.SessionListener;
19 import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
20 import org.opendaylight.netconf.api.xml.XmlUtil;
21 import org.opendaylight.netconf.impl.osgi.NetconfOperationRouter;
22 import org.opendaylight.netconf.notifications.NetconfNotification;
23 import org.opendaylight.netconf.util.messages.SubtreeFilter;
24 import org.opendaylight.yangtools.yang.common.ErrorSeverity;
25 import org.opendaylight.yangtools.yang.common.ErrorTag;
26 import org.opendaylight.yangtools.yang.common.ErrorType;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
29 import org.w3c.dom.Document;
30 import org.w3c.dom.NamedNodeMap;
31 import org.w3c.dom.Node;
33 public class NetconfServerSessionListener implements NetconfSessionListener<NetconfServerSession> {
35 private static final Logger LOG = LoggerFactory.getLogger(NetconfServerSessionListener.class);
36 private final SessionListener monitoringSessionListener;
37 private final NetconfOperationRouter operationRouter;
38 private final AutoCloseable onSessionDownCloseable;
40 public NetconfServerSessionListener(final NetconfOperationRouter operationRouter,
41 final NetconfMonitoringService monitoringService,
42 final AutoCloseable onSessionDownCloseable) {
43 this.operationRouter = operationRouter;
44 this.monitoringSessionListener = monitoringService.getSessionListener();
45 this.onSessionDownCloseable = onSessionDownCloseable;
49 public void onSessionUp(final NetconfServerSession netconfNetconfServerSession) {
50 monitoringSessionListener.onSessionUp(netconfNetconfServerSession);
54 public void onSessionDown(final NetconfServerSession netconfNetconfServerSession, final Exception cause) {
55 LOG.debug("Session {} down, reason: {}", netconfNetconfServerSession, cause.getMessage());
56 onDown(netconfNetconfServerSession);
59 @SuppressWarnings("checkstyle:IllegalCatch")
60 public void onDown(final NetconfServerSession netconfNetconfServerSession) {
61 monitoringSessionListener.onSessionDown(netconfNetconfServerSession);
64 operationRouter.close();
65 } catch (final Exception closingEx) {
66 LOG.debug("Ignoring exception while closing operationRouter", closingEx);
69 onSessionDownCloseable.close();
70 } catch (final Exception ex) {
71 LOG.debug("Ignoring exception while closing onSessionDownCloseable", ex);
76 public void onSessionTerminated(final NetconfServerSession netconfNetconfServerSession,
77 final NetconfTerminationReason netconfTerminationReason) {
78 LOG.debug("Session {} terminated, reason: {}", netconfNetconfServerSession,
79 netconfTerminationReason.getErrorMessage());
80 onDown(netconfNetconfServerSession);
83 @SuppressWarnings("checkstyle:IllegalCatch")
85 public void onMessage(final NetconfServerSession session, final NetconfMessage netconfMessage) {
88 Preconditions.checkState(operationRouter != null, "Cannot handle message, session up was not yet received");
89 // there is no validation since the document may contain yang schemas
90 final NetconfMessage message = processDocument(netconfMessage,
92 LOG.debug("Responding with message {}", message);
93 session.sendMessage(message);
94 monitoringSessionListener.onSessionEvent(SessionEvent.inRpcSuccess(session));
95 } catch (final RuntimeException e) {
96 // TODO: should send generic error or close session?
97 LOG.error("Unexpected exception", e);
98 session.onIncommingRpcFail();
99 monitoringSessionListener.onSessionEvent(SessionEvent.inRpcFail(session));
100 throw new IllegalStateException("Unable to process incoming message " + netconfMessage, e);
101 } catch (final DocumentedException e) {
102 LOG.trace("Error occurred while processing message", e);
103 session.onOutgoingRpcError();
104 session.onIncommingRpcFail();
105 monitoringSessionListener.onSessionEvent(SessionEvent.inRpcFail(session));
106 monitoringSessionListener.onSessionEvent(SessionEvent.outRpcError(session));
107 SendErrorExceptionUtil.sendErrorMessage(session, e, netconfMessage);
111 public void onNotification(final NetconfServerSession session, final NetconfNotification notification) {
112 monitoringSessionListener.onSessionEvent(SessionEvent.notification(session));
115 private NetconfMessage processDocument(final NetconfMessage netconfMessage, final NetconfServerSession session)
116 throws DocumentedException {
118 final Document incomingDocument = netconfMessage.getDocument();
119 final Node rootNode = incomingDocument.getDocumentElement();
121 if (rootNode.getLocalName().equals(XmlNetconfConstants.RPC_KEY)) {
122 final Document responseDocument = XmlUtil.newDocument();
123 checkMessageId(rootNode);
125 Document rpcReply = operationRouter.onNetconfMessage(incomingDocument, session);
127 rpcReply = SubtreeFilter.applyRpcSubtreeFilter(incomingDocument, rpcReply);
129 session.onIncommingRpcSuccess();
131 responseDocument.appendChild(responseDocument.importNode(rpcReply.getDocumentElement(), true));
132 return new NetconfMessage(responseDocument);
134 // unknown command, send RFC 4741 p.70 unknown-element
136 * Tag: unknown-element Error-type: rpc, protocol, application
137 * Severity: error Error-info: <bad-element> : name of the
138 * unexpected element Description: An unexpected element is present.
140 throw new DocumentedException("Unknown tag " + rootNode.getNodeName() + " in message:\n" + netconfMessage,
141 ErrorType.PROTOCOL, ErrorTag.UNKNOWN_ELEMENT, ErrorSeverity.ERROR,
142 ImmutableMap.of("bad-element", rootNode.getNodeName()));
146 private static void checkMessageId(final Node rootNode) throws DocumentedException {
148 final NamedNodeMap attributes = rootNode.getAttributes();
150 if (attributes.getNamedItemNS(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0,
151 XmlNetconfConstants.MESSAGE_ID) != null) {
155 if (attributes.getNamedItem(XmlNetconfConstants.MESSAGE_ID) != null) {
159 throw new DocumentedException("Missing attribute " + rootNode.getNodeName(),
160 ErrorType.RPC, ErrorTag.MISSING_ATTRIBUTE, ErrorSeverity.ERROR, ImmutableMap.of(
161 "bad-attribute", XmlNetconfConstants.MESSAGE_ID,
162 "bad-element", XmlNetconfConstants.RPC_KEY));