netconf/netconf-impl/src/main/java/org/opendaylight/netconf/impl/NetconfServerSessionNegotiatorFactory.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8
   9 package org.opendaylight.netconf.impl;
  10
  11 import com.google.common.base.Function;
  12 import com.google.common.base.Preconditions;
  13 import com.google.common.collect.Collections2;
  14 import com.google.common.collect.ImmutableSet;
  15 import com.google.common.collect.Sets;
  16 import io.netty.channel.Channel;
  17 import io.netty.util.Timer;
  18 import io.netty.util.concurrent.Promise;
  19 import java.net.SocketAddress;
  20 import java.util.Set;
  21 import org.opendaylight.netconf.api.NetconfDocumentedException;
  22 import org.opendaylight.netconf.api.NetconfServerSessionPreferences;
  23 import org.opendaylight.netconf.api.messages.NetconfHelloMessage;
  24 import org.opendaylight.netconf.api.monitoring.NetconfMonitoringService;
  25 import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
  26 import org.opendaylight.netconf.impl.osgi.NetconfOperationRouter;
  27 import org.opendaylight.netconf.impl.osgi.NetconfOperationRouterImpl;
  28 import org.opendaylight.netconf.mapping.api.NetconfOperationService;
  29 import org.opendaylight.netconf.mapping.api.NetconfOperationServiceFactory;
  30 import org.opendaylight.protocol.framework.SessionListenerFactory;
  31 import org.opendaylight.protocol.framework.SessionNegotiator;
  32 import org.opendaylight.protocol.framework.SessionNegotiatorFactory;
  33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Uri;
  34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Capabilities;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 public class NetconfServerSessionNegotiatorFactory implements SessionNegotiatorFactory<NetconfHelloMessage,
  39         NetconfServerSession, NetconfServerSessionListener> {
  40
  41     public static final Set<String> DEFAULT_BASE_CAPABILITIES = ImmutableSet.of(
  42             XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_BASE_1_0,
  43             XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_BASE_1_1,
  44             XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_CAPABILITY_EXI_1_0
  45     );
  46
  47     private final Timer timer;
  48
  49     private final SessionIdProvider idProvider;
  50     private final NetconfOperationServiceFactory aggregatedOpService;
  51     private final long connectionTimeoutMillis;
  52     private final NetconfMonitoringService monitoringService;
  53     private static final Logger LOG = LoggerFactory.getLogger(NetconfServerSessionNegotiatorFactory.class);
  54     private final Set<String> baseCapabilities;
  55
  56     public NetconfServerSessionNegotiatorFactory(final Timer timer,
  57                                                  final NetconfOperationServiceFactory netconfOperationProvider,
  58                                                  final SessionIdProvider idProvider, final long connectionTimeoutMillis,
  59                                                  final NetconfMonitoringService monitoringService,
  60                                                  final Set<String> baseCapabilities) {
  61         this.timer = timer;
  62         this.aggregatedOpService = netconfOperationProvider;
  63         this.idProvider = idProvider;
  64         this.connectionTimeoutMillis = connectionTimeoutMillis;
  65         this.monitoringService = monitoringService;
  66         this.baseCapabilities = validateBaseCapabilities(baseCapabilities == null ? DEFAULT_BASE_CAPABILITIES :
  67                 baseCapabilities);
  68     }
  69
  70
  71     private static ImmutableSet<String> validateBaseCapabilities(final Set<String> baseCapabilities) {
  72         // Check base capabilities to be supported by the server
  73         final Sets.SetView<String> unknownBaseCaps = Sets.difference(baseCapabilities, DEFAULT_BASE_CAPABILITIES);
  74         Preconditions.checkArgument(unknownBaseCaps.isEmpty(),
  75                 "Base capabilities that will be supported by netconf server have to be subset of %s, "
  76                         + "unknown base capabilities: %s",
  77                 DEFAULT_BASE_CAPABILITIES, unknownBaseCaps);
  78
  79         final ImmutableSet.Builder<String> b = ImmutableSet.builder();
  80         b.addAll(baseCapabilities);
  81         // Base 1.0 capability is supported by default
  82         b.add(XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_BASE_1_0);
  83         return b.build();
  84     }
  85
  86     /**
  87      * Get session negotiator.
  88      *
  89      * @param defunctSessionListenerFactory will not be taken into account as session listener factory can
  90      *                                      only be created after snapshot is opened, thus this method constructs
  91      *                                      proper session listener factory.
  92      * @param channel                       Underlying channel
  93      * @param promise                       Promise to be notified
  94      * @return session negotiator
  95      */
  96     @Override
  97     public SessionNegotiator<NetconfServerSession> getSessionNegotiator(
  98             final SessionListenerFactory<NetconfServerSessionListener> defunctSessionListenerFactory,
  99             final Channel channel, final Promise<NetconfServerSession> promise) {
 100         final long sessionId = idProvider.getNextSessionId();
 101
 102         NetconfServerSessionPreferences proposal;
 103         try {
 104             proposal = new NetconfServerSessionPreferences(createHelloMessage(sessionId, monitoringService), sessionId);
 105         } catch (final NetconfDocumentedException e) {
 106             LOG.error("Unable to create hello message for session {} with {}", sessionId, monitoringService);
 107             throw new IllegalStateException(e);
 108         }
 109
 110         return new NetconfServerSessionNegotiator(proposal, promise, channel, timer,
 111                 getListener(Long.toString(sessionId), channel.localAddress()), connectionTimeoutMillis);
 112     }
 113
 114     private NetconfServerSessionListener getListener(final String netconfSessionIdForReporting,
 115                                                      final SocketAddress socketAddress) {
 116         final NetconfOperationService service = getOperationServiceForAddress(netconfSessionIdForReporting,
 117                 socketAddress);
 118         final NetconfOperationRouter operationRouter =
 119                 new NetconfOperationRouterImpl(service, monitoringService, netconfSessionIdForReporting);
 120         return new NetconfServerSessionListener(operationRouter, monitoringService, service);
 121
 122     }
 123
 124     protected NetconfOperationService getOperationServiceForAddress(final String netconfSessionIdForReporting,
 125                                                                     final SocketAddress socketAddress) {
 126         return this.aggregatedOpService.createService(netconfSessionIdForReporting);
 127     }
 128
 129     protected final NetconfOperationServiceFactory getOperationServiceFactory() {
 130         return aggregatedOpService;
 131     }
 132
 133     private NetconfHelloMessage createHelloMessage(
 134             final long sessionId, final NetconfMonitoringService capabilityProvider) throws NetconfDocumentedException {
 135         return NetconfHelloMessage.createServerHello(Sets.union(transformCapabilities(capabilityProvider
 136                 .getCapabilities()), baseCapabilities), sessionId);
 137     }
 138
 139     public static Set<String> transformCapabilities(final Capabilities capabilities) {
 140         return Sets.newHashSet(Collections2.transform(capabilities.getCapability(), new Function<Uri, String>() {
 141             @Override
 142             public String apply(final Uri uri) {
 143                 return uri.getValue();
 144             }
 145         }));
 146     }
 147
 148 }