source: source/ariba/overlay/BaseOverlay.cpp@ 2850

Last change on this file since 2850 was 2803, checked in by Christoph Mayer, 16 years ago

-drop all auto-links when leaving the spovnet
File size: 26.2 KB
Line 
1// [Licence]
2// The Ariba-Underlay Copyright
3//
4// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
5//
6// Institute of Telematics
7// UniversitÀt Karlsruhe (TH)
8// Zirkel 2, 76128 Karlsruhe
9// Germany
10//
11// Redistribution and use in source and binary forms, with or without
12// modification, are permitted provided that the following conditions are
13// met:
14//
15// 1. Redistributions of source code must retain the above copyright
16// notice, this list of conditions and the following disclaimer.
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
21// THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
22// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
25// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32//
33// The views and conclusions contained in the software and documentation
34// are those of the authors and should not be interpreted as representing
35// official policies, either expressed or implied, of the Institute of
36// Telematics.
37// [Licence]
38
39#include "BaseOverlay.h"
40
41#include "ariba/utility/misc/OvlVis.h"
42using ariba::utility::OvlVis;
43
44namespace ariba {
45namespace overlay {
46
47use_logging_cpp(BaseOverlay);
48
49BaseOverlay::BaseOverlay( BaseCommunication& _basecomm, const NodeID& _nodeid )
50 : bc( _basecomm ), nodeId( _nodeid ), spovnetId( SpoVNetID::UNSPECIFIED), overlayInterface( NULL ),
51 initiatorLink( LinkID::UNSPECIFIED ), state( BaseOverlayStateInvalid ) {
52
53 logging_info("creating base overlay");
54
55 bc.registerMessageReceiver( this );
56 bc.registerEventListener( this );
57
58 ovl.visCreate( ovlId, nodeId, string(""), string("") );
59 ovl.visChangeNodeColor(ovlId, nodeId, OvlVis::NODE_COLORS_GREY);
60
61// if (Identifier(Configuration::instance().read<unsigned long>("BASE_nodeid")) ==
62// Identifier(Configuration::instance().read<unsigned long>("SOURCE"))) {
63// ovl.visChangeNodeIcon(ovlId, nodeId, OvlVis::ICON_ID_CAMERA);
64// } else if (Identifier(Configuration::instance().read<unsigned long>("BASE_nodeid")) ==
65// Identifier(Configuration::instance().read<unsigned long>("MR_A"))) {
66// ovl.visChangeNodeIcon(ovlId, nodeId, OvlVis::ICON_ID_CHARACTER_A);
67// } else if (Identifier(Configuration::instance().read<unsigned long>("BASE_nodeid")) ==
68// Identifier(Configuration::instance().read<unsigned long>("MR_W"))) {
69// ovl.visChangeNodeIcon(ovlId, nodeId, OvlVis::ICON_ID_CHARACTER_W);
70// }
71
72 // timer for auto link management
73 Timer::setInterval( 5000 );
74 Timer::start();
75}
76
77BaseOverlay::~BaseOverlay() {
78
79 logging_info("deleting base overlay");
80
81 Timer::stop();
82 bc.unregisterMessageReceiver( this );
83 bc.unregisterEventListener( this );
84}
85
86void BaseOverlay::joinSpoVNet(const SpoVNetID& id, const EndpointDescriptor& bootstrapEp){
87
88 ovl.visShowNodeBubble ( ovlId, nodeId, "joining..." );
89 logging_info( "starting to join spovnet " << id.toString() << "...");
90
91 //
92 // contact the spovnet initiator and request
93 // to join. if the join is granted we will
94 // receive further information on the structure
95 // of the overlay that is used in the spovnet
96 //
97 // but first, we have to establish a link to the initiator...
98 //
99
100 spovnetId = id;
101 state = BaseOverlayStateJoinInitiated;
102
103 initiatorLink = bc.establishLink( bootstrapEp );
104}
105
106void BaseOverlay::leaveSpoVNet(){
107
108 logging_info( "leaving spovnet " << spovnetId );
109
110 logging_debug( "dropping all auto-links ..." );
111
112 BOOST_FOREACH( LinkPair item, linkMapping ){
113 if( item.second.autolink )
114 dropLink( item.first );
115 }
116
117 logging_debug( "leaving overlay" );
118 // first, leave the overlay interface
119 overlayInterface->leaveOverlay();
120
121 if( state != BaseOverlayStateInitiator ){
122
123 // then, leave the spovnet baseoverlay
124 OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeBye, nodeId );
125 bc.sendMessage( initiatorLink, &overMsg );
126
127 // drop the link and set to correct state
128 bc.dropLink( initiatorLink );
129 initiatorLink = LinkID::UNSPECIFIED;
130 }
131
132 state = BaseOverlayStateInvalid;
133 ovl.visShutdown( ovlId, nodeId, string("") );
134
135 // inform all registered services of the event
136 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
137 i->onOverlayDestroy( spovnetId );
138 }
139}
140
141void BaseOverlay::createSpoVNet(const SpoVNetID& id, const OverlayParameterSet& param, const SecurityParameterSet& sec, const QoSParameterSet& qos){
142
143 //
144 // set the state that we are an initiator,
145 // this way incoming messages are handled correctly
146 //
147
148 logging_info("creating spovnet " + id.toString());
149
150 spovnetId = id;
151 state = BaseOverlayStateInitiator;
152
153 overlayInterface = OverlayFactory::create( *this, param, nodeId, this );
154 if( overlayInterface == NULL ){
155 logging_fatal( "overlay structure not supported" );
156 state = BaseOverlayStateInvalid;
157 return;
158 }
159
160 //
161 // create the overlay
162 //
163
164 overlayInterface->createOverlay();
165 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
166 i->onOverlayCreate( spovnetId );
167 }
168
169 //
170 // bootstrap against ourselfs
171 //
172
173 overlayInterface->joinOverlay();
174 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
175 i->onJoinSuccess( spovnetId );
176 }
177
178 ovl.visChangeNodeIcon ( ovlId, nodeId, OvlVis::ICON_ID_CAMERA );
179 ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN);
180}
181
182const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(const LinkID& link) const {
183
184 return bc.getEndpointDescriptor( link );
185}
186
187const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(const NodeID& node) const {
188
189 if( node == nodeId || node == NodeID::UNSPECIFIED )
190 return bc.getEndpointDescriptor();
191
192 if( overlayInterface == NULL ){
193 logging_error( "overlay interface not set, cannot resolve endpoint" );
194 return EndpointDescriptor::UNSPECIFIED;
195 }
196
197 // TODO: if this is not a onehop overlay the operation will go asynchronously
198 return overlayInterface->resolveNode( node );
199}
200
201const LinkID BaseOverlay::establishLink(const NodeID& node, const ServiceID& service){
202
203 // TODO: if this is not a onehop overlay the operation will go asynchronously
204 const EndpointDescriptor& endpoint = overlayInterface->resolveNode( node );
205 if( endpoint == EndpointDescriptor::UNSPECIFIED ){
206 logging_error( "could not resolve node to endpoint. unable to establish link" );
207 return LinkID::UNSPECIFIED;
208 }
209
210 logging_debug( "baseoverlay called to establish link between node " <<
211 node.toString() << " on endpoint " << endpoint.toString() <<
212 " for service " << service.toString() );
213
214 return establishLink( endpoint, service );
215}
216
217const LinkID BaseOverlay::establishLink(const EndpointDescriptor& ep, const ServiceID& service){
218
219 if( !listenerMux.contains( service ) ){
220 logging_error( "no registered listener on serviceid " << service.toString() );
221 return LinkID::UNSPECIFIED;
222 }
223
224 ServiceInterface* receiver = listenerMux.get( service );
225 const LinkID link = bc.establishLink( ep );
226
227 LinkItem item (link, NodeID::UNSPECIFIED, service, receiver);
228 linkMapping.insert( make_pair(link, item) );
229
230 return link;
231}
232
233void BaseOverlay::dropLink(const LinkID& link){
234
235 logging_debug( "baseoverlay dropping link " << link.toString() );
236 LinkMapping::iterator i = linkMapping.find( link );
237
238 if( i == linkMapping.end() ){
239 logging_warn( "can't drop link, mapping unknown " << link.toString() );
240 return;
241 }
242
243 linkMapping.erase( i );
244
245 LinkItem item = i->second;
246 bc.dropLink( link );
247
248 if( item.interface != NULL )
249 item.interface->onLinkDown( spovnetId, nodeId, item.node );
250}
251
252seqnum_t BaseOverlay::sendMessage(const Message* message, const LinkID& link ){
253
254 logging_debug( "baseoverlay is sending message on link " << link.toString() );
255
256 LinkMapping::iterator i = linkMapping.find( link );
257 if( i == linkMapping.end() ){
258 logging_error( "could not send message. link not found " << link.toString() );
259 return -1;
260 }
261
262 OverlayMsg overmsg( OverlayMsg::OverlayMessageTypeData, i->second.service, nodeId );
263 overmsg.encapsulate( const_cast<Message*>(message) );
264
265 i->second.markused();
266 return bc.sendMessage( link, &overmsg );
267}
268
269seqnum_t BaseOverlay::sendMessage(const Message* message, const NodeID& node, const ServiceID& service){
270
271 LinkID link = LinkID::UNSPECIFIED;
272
273 LinkMapping::iterator i = linkMapping.begin();
274 LinkMapping::iterator iend = linkMapping.end();
275
276 for( ; i != iend; i++ ){
277 if( i->second.node == node && i->second.service == service ){
278 link = i->second.link;
279 break;
280 }
281 }
282
283 if( link == LinkID::UNSPECIFIED ){
284
285 logging_info( "no link could be found to send message to node " <<
286 node.toString() << " for service " << service.toString() <<
287 ". creating auto link ...");
288
289 const LinkID link = establishLink( node, service );
290 LinkMapping::iterator i = linkMapping.find( link );
291
292 if( i == linkMapping.end() ){
293 logging_error( "failed to establish auto link to node " << node.toString() <<
294 " for service " << service.toString() );
295 return -1;
296 }
297
298 i->second.autolink = true;
299
300 } // if( link != LinkID::UNSPECIFIED )
301
302 i->second.markused();
303 return sendMessage( message, link );
304}
305
306bool BaseOverlay::bind(ServiceInterface* service, const ServiceID& sid) {
307
308 logging_debug( "binding service " << service << " on serviceid " << sid.toString() );
309
310 if( listenerMux.contains( sid ) ){
311 logging_error( "some service already registered for service id " << sid.toString() );
312 return false;
313 }
314
315 listenerMux.registerItem( service, sid );
316 return true;
317}
318
319ServiceInterface* BaseOverlay::unbind(const ServiceID& sid){
320
321 logging_debug( "unbinding service from serviceid " << sid.toString() );
322
323 if( !listenerMux.contains( sid ) ){
324 logging_warn( "cannot unbind service. no service registered on service id " << sid.toString() );
325 return NULL;
326 }
327
328 ServiceInterface* iface = listenerMux.get( sid );
329 listenerMux.unregisterItem( sid );
330
331 return NULL; //iface;
332}
333
334void BaseOverlay::onLinkUp(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
335
336 logging_debug( "base overlay received linkup event " + id.toString() );
337 // TODO: updateOvlVis( getNodeID(id) );
338
339 //
340 // if we get up a link while we are in the
341 // join phase and this is the link that
342 // we have initiated towards the spovnet owner
343 // continue the join process by sending
344 // a join request message through the link
345 //
346
347 if( state == BaseOverlayStateJoinInitiated && id == initiatorLink){
348
349 logging_info( "join has been initiated by me and the link is now up. " <<
350 "sending out join request for spovnet " <<
351 spovnetId.toString() );
352
353 OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeJoinRequest, nodeId );
354 JoinRequest joinmsg( spovnetId, nodeId );
355 overMsg.encapsulate( &joinmsg );
356
357 state = BaseOverlayStateJoinInitiated; // state remains in JoinInitiated
358 bc.sendMessage( id, &overMsg );
359
360 return;
361
362 } // if( state == BaseOverlayStateJoinInitiated && id == initiatorLink)
363
364 //
365 // otherwise this is a link initiated by a service
366 // then we exchange update messages to exchange the
367 // service id and node id for the link. in this case
368 // we should have a link mapping for this link. if
369 // we have no link mapping this link was initiated by
370 // the remote side.
371 //
372
373 LinkMapping::iterator i = linkMapping.find( id );
374
375 if( i == linkMapping.end() ){
376
377 LinkItem item (id, NodeID::UNSPECIFIED, ServiceID::UNSPECIFIED, NULL );
378 linkMapping.insert( make_pair(id, item) );
379
380 } else {
381
382 logging_debug( "sending out OverlayMessageTypeUpdate" <<
383 " for service " << i->second.service.toString() <<
384 " with local node id " << nodeId.toString() <<
385 " on link " << id.toString() );
386
387 OverlayMsg overMsg(
388 OverlayMsg::OverlayMessageTypeUpdate,
389 i->second.service,
390 nodeId
391 );
392
393 bc.sendMessage( id, &overMsg );
394 i->second.markused();
395
396 } // if( i == linkMapping.end() )
397
398 // the link is only valid for the service when we receive
399 // the OverlayMessageTypeUpdate from the remote node and
400 // have the nodeid and serviceid for the link!
401}
402
403void BaseOverlay::onLinkDown(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
404
405 logging_debug( "link went down " << id.toString() );
406
407 //
408 // tell the service that the link went
409 // down and remove the mapping
410 //
411
412 LinkMapping::iterator i = linkMapping.find( id );
413 if( i == linkMapping.end() ) {
414 // this can also be one of the baseoverlay links that
415 // no mapping is stored for. therefore we issue no warning
416 return;
417 }
418
419 if( i->second.interface != NULL )
420 i->second.interface->onLinkDown( id, nodeId, i->second.node );
421
422 linkMapping.erase( i );
423}
424
425void BaseOverlay::onLinkChanged(const LinkID& id, const NetworkLocator* oldlocal, const NetworkLocator* newlocal, const NetworkLocator* oldremote, const NetworkLocator* newremote){
426
427 logging_debug( "link changed " << id.toString() );
428
429 //
430 // tell the service that the link changed
431 //
432
433 LinkMapping::iterator i = linkMapping.find( id );
434 if( i == linkMapping.end() ) return;
435
436 if( i->second.interface != NULL )
437 i->second.interface->onLinkChanged( id, nodeId, i->second.node );
438
439 i->second.markused();
440}
441
442void BaseOverlay::onLinkFail(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
443
444 logging_debug( "link failed " << id.toString() );
445
446 //
447 // tell the service that the link failed
448 //
449
450 LinkMapping::iterator i = linkMapping.find( id );
451 if( i == linkMapping.end() ) return;
452
453 if( i->second.interface != NULL )
454 i->second.interface->onLinkFail( id, nodeId, i->second.node );
455
456 i->second.markused();
457}
458
459void BaseOverlay::onLinkQoSChanged(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote, const QoSParameterSet& qos) {
460
461 logging_debug( "link qos changed " << id.toString() );
462
463 //
464 // tell the service that the link qos has changed
465 //
466
467 LinkMapping::iterator i = linkMapping.find( id );
468 if( i == linkMapping.end() ) return;
469
470 if( i->second.interface != NULL )
471 i->second.interface->onLinkQoSChanged( id, nodeId, i->second.node, qos );
472
473 i->second.markused();
474}
475
476bool BaseOverlay::receiveMessage(const Message* message,
477 const LinkID& link, const NodeID& /*the nodeid is invalid in this case! removed var to prevent errors*/ ){
478
479 OverlayMsg* overlayMsg = ((Message*)message)->decapsulate<OverlayMsg>();
480 if( overlayMsg == NULL ) return false;
481
482 // mark the link as in action
483 LinkMapping::iterator item = linkMapping.find( link );
484 if( item != linkMapping.end() ) item->second.markused();
485
486 //
487 // handle user date that we forward to the
488 // appropriate service using the service id
489 // in the message. as we don't know the class
490 // of message that the service handles, we
491 // forward it as a pure Message*
492 //
493
494 if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeData) ) {
495
496 logging_debug( "baseoverlay received message of type OverlayMessageTypeData" );
497
498 const ServiceID& service = overlayMsg->getService();
499 ServiceInterface* serviceListener = listenerMux.get( service );
500
501 logging_debug( "received data for service " << service.toString() );
502
503 if( serviceListener != NULL )
504 serviceListener->receiveMessage( overlayMsg, link, overlayMsg->getSourceNode() );
505
506 return true;
507
508 } // if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeData) )
509
510 //
511 // handle spovnet instance join requests
512 //
513
514 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinRequest) &&
515 state == BaseOverlayStateInitiator){
516
517 logging_debug( "baseoverlay received message of type OverlayMessageTypeJoinRequest" );
518
519 JoinRequest* joinReq = overlayMsg->decapsulate<JoinRequest>();
520 logging_info( "received join request for spovnet " <<
521 joinReq->getSpoVNetID().toString() );
522
523 //
524 // make sure that the node actually wants to join
525 // the correct spovnet id that we administrate
526 //
527
528 if( joinReq->getSpoVNetID() != spovnetId ){
529 logging_error( "received join request for spovnet we don't handle " <<
530 joinReq->getSpoVNetID().toString() );
531 return false;
532 }
533
534 //
535 // only if all services allow the node to join it is allowed
536 // using the isJoinAllowed interface security policies can be
537 // implemented by higher layer services
538 //
539
540 bool allow = true;
541
542 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
543 allow &= i->isJoinAllowed( overlayMsg->getSourceNode(), spovnetId );
544 }
545
546 logging_info( "sending back join reply for spovnet " <<
547 spovnetId.toString() << " to node " <<
548 overlayMsg->getSourceNode().toString() <<
549 ". result: " << (allow ? "allowed" : "denied") );
550
551 joiningNodes.push_back( overlayMsg->getSourceNode() );
552
553 //
554 // send back our spovnetid, default overlay parameters,
555 // join allow result, and ourself as the endpoint
556 // to bootstrap the overlay against
557 //
558
559 OverlayMsg retmsg( OverlayMsg::OverlayMessageTypeJoinReply, nodeId );
560 JoinReply replyMsg( spovnetId, OverlayParameterSet::DEFAULT,
561 allow, getEndpointDescriptor() );
562
563 retmsg.encapsulate(&replyMsg);
564 bc.sendMessage( link, &retmsg );
565
566 return true;
567
568 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinRequest) && state == BaseOverlayStateInitiator)
569
570 //
571 // handle replies to spovnet instance join requests
572 //
573
574 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinReply) &&
575 state == BaseOverlayStateJoinInitiated){
576
577 logging_debug( "baseoverlay received message of type OverlayMessageTypeJoinReply" );
578
579 JoinReply* replyMsg = overlayMsg->decapsulate<JoinReply>();
580 logging_info( "received spovnet join reply" );
581
582 //
583 // make sure that we actually wanted to get
584 // into the spovnet whose id is in the message
585 //
586
587 if( replyMsg->getSpoVNetID() != spovnetId ){
588 logging_error( "received spovnet join reply for spovnet " <<
589 replyMsg->getSpoVNetID().toString() <<
590 " but we wanted to join spovnet " <<
591 spovnetId.toString() );
592
593 // state does not change here, maybe
594 // the reply does come in later
595 return false;
596 }
597
598 //
599 // if we did not get access to the spovnet
600 // notify of the failure and
601 // close the link to the initiator
602 //
603
604 if( ! replyMsg->getJoinAllowed() ){
605
606 logging_warn( "our join request has been denied" );
607
608 bc.dropLink( initiatorLink );
609 initiatorLink = LinkID::UNSPECIFIED;
610 state = BaseOverlayStateInvalid;
611
612 // inform all registered services of the event
613 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
614 i->onJoinFail( spovnetId );
615 }
616
617 return true;
618 }
619
620 logging_info( "join request has been accepted for spovnet " << spovnetId.toString() );
621
622 //
623 // if we did get access to the spovnet
624 // we try to create the overlay structure
625 // as given in the reply message
626 //
627
628 overlayInterface = OverlayFactory::create( *this, replyMsg->getParam(), nodeId, this );
629
630 if( overlayInterface == NULL ){
631 logging_error( "overlay structure not supported" );
632
633 bc.dropLink( initiatorLink );
634 initiatorLink = LinkID::UNSPECIFIED;
635 state = BaseOverlayStateInvalid;
636
637 // inform all registered services of the event
638 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
639 i->onJoinFail( spovnetId );
640 }
641
642 return true;
643 }
644
645 //
646 // now start the join process for the overlay.
647 // the join process for the spovnet baseoverlay
648 // is now complete. we use the endpoint for
649 // overlay structure bootstrapping that the
650 // initiator provided in his reply message
651 //
652
653 state = BaseOverlayStateCompleted;
654 ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN);
655
656 overlayInterface->createOverlay();
657
658 // inform all registered services of the event
659 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
660 i->onOverlayCreate( spovnetId );
661 }
662
663 overlayInterface->joinOverlay( replyMsg->getBootstrapEndpoint() );
664
665 // inform all registered services of the event
666 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
667 i->onJoinSuccess( spovnetId );
668 }
669
670 return true;
671
672 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinReply) && state == BaseOverlayStateJoinInitiated)
673
674
675 //
676 // handle update messages for link establishment
677 //
678
679 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeUpdate) ){
680
681 logging_debug( "baseoverlay received message of type OverlayMessageTypeUpdate" );
682
683 const NodeID& sourcenode = overlayMsg->getSourceNode();
684 const ServiceID& service = overlayMsg->getService();
685
686 //
687 // we should have a linkmapping for the link, otherwise
688 // we ignore update messages
689 //
690
691 LinkMapping::iterator i = linkMapping.find( link );
692 if( i == linkMapping.end() ){
693 logging_warn( "received overlay update message for link " <<
694 link.toString() << " for which we have no mapping" );
695 return false;
696 }
697
698 //
699 // update our link mapping information for this link
700 //
701
702 bool changed = ( i->second.node != sourcenode ) || ( i->second.service != service );
703
704 i->second.node = sourcenode;
705 i->second.service = service;
706
707 //
708 // if our link information changed, we send out an update, too
709 //
710
711 if( changed ){
712 OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeUpdate, i->second.service, nodeId );
713 bc.sendMessage( link, &overMsg );
714 }
715
716 //
717 // set the correct listener service for the linkitem
718 // now we can tell the registered service of the linkup event
719 //
720
721 if( !listenerMux.contains( service ) ){
722 logging_warn( "linkup event for service that has not been registered" );
723 return false;
724 }
725
726 ServiceInterface* iface = listenerMux.get( service );
727 if( iface == NULL ){
728 logging_warn( "linkup event for service that has been registered with a NULL interface" );
729 return true;
730 }
731
732 i->second.interface = iface;
733 iface->onLinkUp( link, nodeId, sourcenode );
734 i->second.markused();
735
736 return true ;
737
738 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeUpdate) )
739
740 //
741 // bye messages to say goodbye
742 //
743
744 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeBye)){
745
746 logging_debug( "baseoverlay received message of type OverlayMessageTypeBye" );
747
748 logging_debug( "received bye message from " <<
749 overlayMsg->getSourceNode().toString() );
750
751 //
752 // if we are the initiator and receive a bye from a node
753 // the node just left. if we are a node and receive a bye
754 // from the initiator, we have to close, too.
755 //
756
757 if( overlayMsg->getSourceNode() == spovnetInitiator ){
758
759 bc.dropLink( initiatorLink );
760 initiatorLink = LinkID::UNSPECIFIED;
761 state = BaseOverlayStateInvalid;
762
763 logging_fatal( "initiator ended spovnet" );
764
765 // inform all registered services of the event
766 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
767 i->onOverlayDestroy( spovnetId );
768 }
769
770 } else {
771
772 // a node that said goodbye and we are the initiator
773 // don't have to do much here, as the node also
774 // will go out of the overlay structure
775 logging_info( "node left " << overlayMsg->getSourceNode() );
776
777 // inform all registered services of the event
778 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
779 i->onNodeLeave( overlayMsg->getSourceNode(), spovnetId );
780 }
781 }
782
783 return true;
784
785 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeBye))
786
787 //
788 // something wrong ...
789 //
790
791 else {
792
793 logging_error( "received message in invalid state! don't know " <<
794 "what to do with this message of type " <<
795 overlayMsg->getType() );
796 return false;
797
798 } // else
799
800 return false;
801}
802
803void BaseOverlay::broadcastMessage(Message* message, const ServiceID& service){
804
805 logging_debug( "broadcasting message to all known nodes " <<
806 "in the overlay from service " + service.toString() );
807
808 OverlayInterface::NodeList nodes = overlayInterface->getKnownNodes();
809
810 OverlayInterface::NodeList::iterator i = nodes.begin();
811 OverlayInterface::NodeList::iterator iend = nodes.end();
812
813 for( ; i != iend; i++ ){
814 if( *i == nodeId) continue; // don't send to ourselfs
815 sendMessage( message, *i, service ); // TODO: sollte auto links aufbauen fÃŒr sowas
816 }
817}
818
819void BaseOverlay::updateOvlVis( const NodeID& n ) {
820 NodeID node = n;
821/* void visShowNodeBubble (
822 NETWORK_ID network,
823 NodeID& node,
824 string label
825 );
826*/
827 using namespace std;
828
829 if (node == nodeId || node.isUnspecified()) return;
830
831 // min/max
832 if ( node < min || min.isUnspecified() ) min = node;
833 if ( node > max || max.isUnspecified() ) max = node;
834
835 // successor
836 if ( succ.isUnspecified() || (node > nodeId && (succ < nodeId || (node-nodeId) < (succ-nodeId))) ) {
837 if (!succ.isUnspecified() && node != succ)
838 ovl.visDisconnect(ovlId, nodeId, succ, string(""));
839 succ = node;
840 ovl.visConnect(ovlId, nodeId, succ, string(""));
841 }
842
843 // set successor (circle-wrap)
844 if (succ.isUnspecified() && !min.isUnspecified()) {
845 succ = min;
846 ovl.visConnect(ovlId, nodeId, succ, string(""));
847 }
848}
849
850const NodeID& BaseOverlay::getNodeID(const LinkID& lid) const {
851
852 if( lid == LinkID::UNSPECIFIED ) return nodeId;
853
854 LinkMapping::const_iterator i = linkMapping.find( lid );
855 if( i == linkMapping.end() ) return NodeID::UNSPECIFIED;
856 else return i->second.node;
857}
858
859void BaseOverlay::incomingRouteMessage(Message* msg){
860 // gets handled as normal data message
861 // TODO: passt das so?
862 receiveMessage( msg, LinkID::UNSPECIFIED, NodeID::UNSPECIFIED );
863}
864
865void BaseOverlay::onNodeJoin(const NodeID& node){
866
867 JoiningNodes::iterator i = std::find( joiningNodes.begin(), joiningNodes.end(), node );
868 if( i == joiningNodes.end() ) return;
869
870 logging_info( "node has successfully joined baseoverlay and overlay structure "
871 << node.toString() );
872
873 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
874 i->onNodeJoin( node, spovnetId );
875 }
876
877 joiningNodes.erase( i );
878}
879
880void BaseOverlay::eventFunction(){
881
882 list<LinkID> oldlinks;
883 time_t now = time(NULL);
884
885 // first gather all the links from linkMapping that need droppin
886 // don't directly drop, as the dropLink function affects the
887 // linkMapping structure that we are traversing here.
888 // drop links after a timeout of 30s
889
890 BOOST_FOREACH( LinkPair item, linkMapping ){
891 if( item.second.autolink && difftime(now, item.second.lastuse) > 30)
892 oldlinks.push_back( item.first );
893 }
894
895 BOOST_FOREACH( const LinkID lnk, oldlinks ){
896 logging_debug( "auto-link " << lnk.toString() << " timed out and is getting dropped" );
897 dropLink( lnk );
898 }
899}
900
901}} // namespace ariba, overlay
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