source: source/ariba/overlay/BaseOverlay.cpp@ 2483

Last change on this file since 2483 was 2483, checked in by Christoph Mayer, 17 years ago

-autolinks impl. (funktioniert noch nicht komplett, macht aber im moment nichts schlechter)
-einige fixes im ablauf etc.
File size: 26.0 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 // first, leave the overlay interface
111 overlayInterface->leaveOverlay();
112
113 if( state != BaseOverlayStateInitiator ){
114
115 // then, leave the spovnet baseoverlay
116 OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeBye, nodeId );
117 bc.sendMessage( initiatorLink, &overMsg );
118
119 // drop the link and set to correct state
120 bc.dropLink( initiatorLink );
121 initiatorLink = LinkID::UNSPECIFIED;
122 }
123
124 state = BaseOverlayStateInvalid;
125 ovl.visShutdown( ovlId, nodeId, string("") );
126
127 // inform all registered services of the event
128 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
129 i->onOverlayDestroy( spovnetId );
130 }
131}
132
133void BaseOverlay::createSpoVNet(const SpoVNetID& id, const OverlayParameterSet& param, const SecurityParameterSet& sec, const QoSParameterSet& qos){
134
135 //
136 // set the state that we are an initiator,
137 // this way incoming messages are handled correctly
138 //
139
140 logging_info("creating spovnet " + id.toString());
141
142 spovnetId = id;
143 state = BaseOverlayStateInitiator;
144
145 overlayInterface = OverlayFactory::create( *this, param, nodeId, this );
146 if( overlayInterface == NULL ){
147 logging_fatal( "overlay structure not supported" );
148 state = BaseOverlayStateInvalid;
149 return;
150 }
151
152 //
153 // create the overlay
154 //
155
156 overlayInterface->createOverlay();
157 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
158 i->onOverlayCreate( spovnetId );
159 }
160
161 //
162 // bootstrap against ourselfs
163 //
164
165 overlayInterface->joinOverlay();
166 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
167 i->onJoinSuccess( spovnetId );
168 }
169
170 ovl.visChangeNodeIcon ( ovlId, nodeId, OvlVis::ICON_ID_CAMERA );
171 ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN);
172}
173
174const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(const LinkID& link) const {
175
176 return bc.getEndpointDescriptor( link );
177}
178
179const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(const NodeID& node) const {
180
181 if( node == nodeId || node == NodeID::UNSPECIFIED )
182 return bc.getEndpointDescriptor();
183
184 if( overlayInterface == NULL ){
185 logging_error( "overlay interface not set, cannot resolve endpoint" );
186 return EndpointDescriptor::UNSPECIFIED;
187 }
188
189 // TODO: if this is not a onehop overlay the operation will go asynchronously
190 return overlayInterface->resolveNode( node );
191}
192
193const LinkID BaseOverlay::establishLink(const NodeID& node, const ServiceID& service){
194
195 // TODO: if this is not a onehop overlay the operation will go asynchronously
196 const EndpointDescriptor& endpoint = overlayInterface->resolveNode( node );
197 if( endpoint == EndpointDescriptor::UNSPECIFIED ){
198 logging_error( "could not resolve node to endpoint. unable to establish link" );
199 return LinkID::UNSPECIFIED;
200 }
201
202 logging_debug( "baseoverlay called to establish link between node " <<
203 node.toString() << " on endpoint " << endpoint.toString() <<
204 " for service " << service.toString() );
205
206 return establishLink( endpoint, service );
207}
208
209const LinkID BaseOverlay::establishLink(const EndpointDescriptor& ep, const ServiceID& service){
210
211 if( !listenerMux.contains( service ) ){
212 logging_error( "no registered listener on serviceid " << service.toString() );
213 return LinkID::UNSPECIFIED;
214 }
215
216 ServiceInterface* receiver = listenerMux.get( service );
217 const LinkID link = bc.establishLink( ep );
218
219 LinkItem item (link, NodeID::UNSPECIFIED, service, receiver);
220 linkMapping.insert( make_pair(link, item) );
221
222 return link;
223}
224
225void BaseOverlay::dropLink(const LinkID& link){
226
227 logging_debug( "baseoverlay dropping link " << link.toString() );
228 LinkMapping::iterator i = linkMapping.find( link );
229
230 if( i == linkMapping.end() ){
231 logging_warn( "can't drop link, mapping unknown " << link.toString() );
232 return;
233 }
234
235 linkMapping.erase( i );
236
237 LinkItem item = i->second;
238 bc.dropLink( link );
239
240 if( item.interface != NULL )
241 item.interface->onLinkDown( spovnetId, nodeId, item.node );
242}
243
244seqnum_t BaseOverlay::sendMessage(const Message* message, const LinkID& link ){
245
246 logging_debug( "baseoverlay is sending message on link " << link.toString() );
247
248 LinkMapping::iterator i = linkMapping.find( link );
249 if( i == linkMapping.end() ){
250 logging_error( "could not send message. link not found " << link.toString() );
251 return -1;
252 }
253
254 OverlayMsg overmsg( OverlayMsg::OverlayMessageTypeData, i->second.service, nodeId );
255 overmsg.encapsulate( const_cast<Message*>(message) );
256
257 i->second.markused();
258 return bc.sendMessage( link, &overmsg );
259}
260
261seqnum_t BaseOverlay::sendMessage(const Message* message, const NodeID& node, const ServiceID& service){
262
263 LinkID link = LinkID::UNSPECIFIED;
264
265 LinkMapping::iterator i = linkMapping.begin();
266 LinkMapping::iterator iend = linkMapping.end();
267
268 for( ; i != iend; i++ ){
269 if( i->second.node == node && i->second.service == service ){
270 link = i->second.link;
271 break;
272 }
273 }
274
275 if( link == LinkID::UNSPECIFIED ){
276
277 logging_info( "no link could be found to send message to node " <<
278 node.toString() << " for service " << service.toString() <<
279 ". creating auto link ...");
280
281 const LinkID link = establishLink( node, service );
282 LinkMapping::iterator i = linkMapping.find( link );
283
284 if( i == linkMapping.end() ){
285 logging_error( "failed to establish auto link to node " << node.toString() <<
286 " for service " << service.toString() );
287 return -1;
288 }
289
290 i->second.autolink = true;
291
292 } // if( link != LinkID::UNSPECIFIED )
293
294 i->second.markused();
295 return sendMessage( message, link );
296}
297
298bool BaseOverlay::bind(ServiceInterface* service, const ServiceID& sid) {
299
300 logging_debug( "binding service " << service << " on serviceid " << sid.toString() );
301
302 if( listenerMux.contains( sid ) ){
303 logging_error( "some service already registered for service id " << sid.toString() );
304 return false;
305 }
306
307 listenerMux.registerItem( service, sid );
308 return true;
309}
310
311ServiceInterface* BaseOverlay::unbind(const ServiceID& sid){
312
313 logging_debug( "unbinding service from serviceid " << sid.toString() );
314
315 if( !listenerMux.contains( sid ) ){
316 logging_warn( "cannot unbind service. no service registered on service id " << sid.toString() );
317 return NULL;
318 }
319
320 ServiceInterface* iface = listenerMux.get( sid );
321 listenerMux.unregisterItem( sid );
322
323 return NULL; //iface;
324}
325
326void BaseOverlay::onLinkUp(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
327
328 logging_debug( "base overlay received linkup event " + id.toString() );
329 // TODO: updateOvlVis( getNodeID(id) );
330
331 //
332 // if we get up a link while we are in the
333 // join phase and this is the link that
334 // we have initiated towards the spovnet owner
335 // continue the join process by sending
336 // a join request message through the link
337 //
338
339 if( state == BaseOverlayStateJoinInitiated && id == initiatorLink){
340
341 logging_info( "join has been initiated by me and the link is now up. " <<
342 "sending out join request for spovnet " <<
343 spovnetId.toString() );
344
345 OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeJoinRequest, nodeId );
346 JoinRequest joinmsg( spovnetId, nodeId );
347 overMsg.encapsulate( &joinmsg );
348
349 state = BaseOverlayStateJoinInitiated; // state remains in JoinInitiated
350 bc.sendMessage( id, &overMsg );
351
352 return;
353
354 } // if( state == BaseOverlayStateJoinInitiated && id == initiatorLink)
355
356 //
357 // otherwise this is a link initiated by a service
358 // then we exchange update messages to exchange the
359 // service id and node id for the link. in this case
360 // we should have a link mapping for this link. if
361 // we have no link mapping this link was initiated by
362 // the remote side.
363 //
364
365 LinkMapping::iterator i = linkMapping.find( id );
366
367 if( i == linkMapping.end() ){
368
369 LinkItem item (id, NodeID::UNSPECIFIED, ServiceID::UNSPECIFIED, NULL );
370 linkMapping.insert( make_pair(id, item) );
371
372 } else {
373
374 logging_debug( "sending out OverlayMessageTypeUpdate" <<
375 " for service " << i->second.service.toString() <<
376 " with local node id " << nodeId.toString() <<
377 " on link " << id.toString() );
378
379 OverlayMsg overMsg(
380 OverlayMsg::OverlayMessageTypeUpdate,
381 i->second.service,
382 nodeId
383 );
384
385 bc.sendMessage( id, &overMsg );
386 i->second.markused();
387
388 } // if( i == linkMapping.end() )
389
390 // the link is only valid for the service when we receive
391 // the OverlayMessageTypeUpdate from the remote node and
392 // have the nodeid and serviceid for the link!
393}
394
395void BaseOverlay::onLinkDown(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
396
397 logging_debug( "link went down " << id.toString() );
398
399 //
400 // tell the service that the link went
401 // down and remove the mapping
402 //
403
404 LinkMapping::iterator i = linkMapping.find( id );
405 if( i == linkMapping.end() ) {
406 // this can also be one of the baseoverlay links that
407 // no mapping is stored for. therefore we issue no warning
408 return;
409 }
410
411 if( i->second.interface != NULL )
412 i->second.interface->onLinkDown( id, nodeId, i->second.node );
413
414 linkMapping.erase( i );
415}
416
417void BaseOverlay::onLinkChanged(const LinkID& id, const NetworkLocator* oldlocal, const NetworkLocator* newlocal, const NetworkLocator* oldremote, const NetworkLocator* newremote){
418
419 logging_debug( "link changed " << id.toString() );
420
421 //
422 // tell the service that the link changed
423 //
424
425 LinkMapping::iterator i = linkMapping.find( id );
426 if( i == linkMapping.end() ) return;
427
428 if( i->second.interface != NULL )
429 i->second.interface->onLinkChanged( id, nodeId, i->second.node );
430
431 i->second.markused();
432}
433
434void BaseOverlay::onLinkFail(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
435
436 logging_debug( "link failed " << id.toString() );
437
438 //
439 // tell the service that the link failed
440 //
441
442 LinkMapping::iterator i = linkMapping.find( id );
443 if( i == linkMapping.end() ) return;
444
445 if( i->second.interface != NULL )
446 i->second.interface->onLinkFail( id, nodeId, i->second.node );
447
448 i->second.markused();
449}
450
451void BaseOverlay::onLinkQoSChanged(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote, const QoSParameterSet& qos) {
452
453 logging_debug( "link qos changed " << id.toString() );
454
455 //
456 // tell the service that the link qos has changed
457 //
458
459 LinkMapping::iterator i = linkMapping.find( id );
460 if( i == linkMapping.end() ) return;
461
462 if( i->second.interface != NULL )
463 i->second.interface->onLinkQoSChanged( id, nodeId, i->second.node, qos );
464
465 i->second.markused();
466}
467
468bool BaseOverlay::receiveMessage(const Message* message,
469 const LinkID& link, const NodeID& /*the nodeid is invalid in this case! removed var to prevent errors*/ ){
470
471 OverlayMsg* overlayMsg = ((Message*)message)->decapsulate<OverlayMsg>();
472 if( overlayMsg == NULL ) return false;
473
474 // mark the link as in action
475 LinkMapping::iterator item = linkMapping.find( link );
476 if( item != linkMapping.end() ) item->second.markused();
477
478 //
479 // handle user date that we forward to the
480 // appropriate service using the service id
481 // in the message. as we don't know the class
482 // of message that the service handles, we
483 // forward it as a pure Message*
484 //
485
486 if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeData) ) {
487
488 logging_debug( "baseoverlay received message of type OverlayMessageTypeData" );
489
490 const ServiceID& service = overlayMsg->getService();
491 ServiceInterface* serviceListener = listenerMux.get( service );
492
493 logging_debug( "received data for service " << service.toString() );
494
495 if( serviceListener != NULL )
496 serviceListener->receiveMessage( overlayMsg, link, overlayMsg->getSourceNode() );
497
498 return true;
499
500 } // if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeData) )
501
502 //
503 // handle spovnet instance join requests
504 //
505
506 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinRequest) &&
507 state == BaseOverlayStateInitiator){
508
509 logging_debug( "baseoverlay received message of type OverlayMessageTypeJoinRequest" );
510
511 JoinRequest* joinReq = overlayMsg->decapsulate<JoinRequest>();
512 logging_info( "received join request for spovnet " <<
513 joinReq->getSpoVNetID().toString() );
514
515 //
516 // make sure that the node actually wants to join
517 // the correct spovnet id that we administrate
518 //
519
520 if( joinReq->getSpoVNetID() != spovnetId ){
521 logging_error( "received join request for spovnet we don't handle " <<
522 joinReq->getSpoVNetID().toString() );
523 return false;
524 }
525
526 //
527 // only if all services allow the node to join it is allowed
528 // using the isJoinAllowed interface security policies can be
529 // implemented by higher layer services
530 //
531
532 bool allow = true;
533
534 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
535 allow &= i->isJoinAllowed( overlayMsg->getSourceNode(), spovnetId );
536 }
537
538 logging_info( "sending back join reply for spovnet " <<
539 spovnetId.toString() << " to node " <<
540 overlayMsg->getSourceNode().toString() <<
541 ". result: " << (allow ? "allowed" : "denied") );
542
543 joiningNodes.push_back( overlayMsg->getSourceNode() );
544
545 //
546 // send back our spovnetid, default overlay parameters,
547 // join allow result, and ourself as the endpoint
548 // to bootstrap the overlay against
549 //
550
551 OverlayMsg retmsg( OverlayMsg::OverlayMessageTypeJoinReply, nodeId );
552 JoinReply replyMsg( spovnetId, OverlayParameterSet::DEFAULT,
553 allow, getEndpointDescriptor() );
554
555 retmsg.encapsulate(&replyMsg);
556 bc.sendMessage( link, &retmsg );
557
558 return true;
559
560 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinRequest) && state == BaseOverlayStateInitiator)
561
562 //
563 // handle replies to spovnet instance join requests
564 //
565
566 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinReply) &&
567 state == BaseOverlayStateJoinInitiated){
568
569 logging_debug( "baseoverlay received message of type OverlayMessageTypeJoinReply" );
570
571 JoinReply* replyMsg = overlayMsg->decapsulate<JoinReply>();
572 logging_info( "received spovnet join reply" );
573
574 //
575 // make sure that we actually wanted to get
576 // into the spovnet whose id is in the message
577 //
578
579 if( replyMsg->getSpoVNetID() != spovnetId ){
580 logging_error( "received spovnet join reply for spovnet " <<
581 replyMsg->getSpoVNetID().toString() <<
582 " but we wanted to join spovnet " <<
583 spovnetId.toString() );
584
585 // state does not change here, maybe
586 // the reply does come in later
587 return false;
588 }
589
590 //
591 // if we did not get access to the spovnet
592 // notify of the failure and
593 // close the link to the initiator
594 //
595
596 if( ! replyMsg->getJoinAllowed() ){
597
598 logging_warn( "our join request has been denied" );
599
600 bc.dropLink( initiatorLink );
601 initiatorLink = LinkID::UNSPECIFIED;
602 state = BaseOverlayStateInvalid;
603
604 // inform all registered services of the event
605 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
606 i->onJoinFail( spovnetId );
607 }
608
609 return true;
610 }
611
612 logging_info( "join request has been accepted for spovnet " << spovnetId.toString() );
613
614 //
615 // if we did get access to the spovnet
616 // we try to create the overlay structure
617 // as given in the reply message
618 //
619
620 overlayInterface = OverlayFactory::create( *this, replyMsg->getParam(), nodeId, this );
621
622 if( overlayInterface == NULL ){
623 logging_error( "overlay structure not supported" );
624
625 bc.dropLink( initiatorLink );
626 initiatorLink = LinkID::UNSPECIFIED;
627 state = BaseOverlayStateInvalid;
628
629 // inform all registered services of the event
630 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
631 i->onJoinFail( spovnetId );
632 }
633
634 return true;
635 }
636
637 //
638 // now start the join process for the overlay.
639 // the join process for the spovnet baseoverlay
640 // is now complete. we use the endpoint for
641 // overlay structure bootstrapping that the
642 // initiator provided in his reply message
643 //
644
645 state = BaseOverlayStateCompleted;
646 ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN);
647
648 overlayInterface->createOverlay();
649
650 // inform all registered services of the event
651 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
652 i->onOverlayCreate( spovnetId );
653 }
654
655 overlayInterface->joinOverlay( replyMsg->getBootstrapEndpoint() );
656
657 // inform all registered services of the event
658 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
659 i->onJoinSuccess( spovnetId );
660 }
661
662 return true;
663
664 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinReply) && state == BaseOverlayStateJoinInitiated)
665
666
667 //
668 // handle update messages for link establishment
669 //
670
671 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeUpdate) ){
672
673 logging_debug( "baseoverlay received message of type OverlayMessageTypeUpdate" );
674
675 const NodeID& sourcenode = overlayMsg->getSourceNode();
676 const ServiceID& service = overlayMsg->getService();
677
678 //
679 // we should have a linkmapping for the link, otherwise
680 // we ignore update messages
681 //
682
683 LinkMapping::iterator i = linkMapping.find( link );
684 if( i == linkMapping.end() ){
685 logging_warn( "received overlay update message for link " <<
686 link.toString() << " for which we have no mapping" );
687 return false;
688 }
689
690 //
691 // update our link mapping information for this link
692 //
693
694 bool changed = ( i->second.node != sourcenode ) || ( i->second.service != service );
695
696 i->second.node = sourcenode;
697 i->second.service = service;
698
699 //
700 // if our link information changed, we send out an update, too
701 //
702
703 if( changed ){
704 OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeUpdate, i->second.service, nodeId );
705 bc.sendMessage( link, &overMsg );
706 }
707
708 //
709 // set the correct listener service for the linkitem
710 // now we can tell the registered service of the linkup event
711 //
712
713 if( !listenerMux.contains( service ) ){
714 logging_warn( "linkup event for service that has not been registered" );
715 return false;
716 }
717
718 ServiceInterface* iface = listenerMux.get( service );
719 if( iface == NULL ){
720 logging_warn( "linkup event for service that has been registered with a NULL interface" );
721 return true;
722 }
723
724 i->second.interface = iface;
725 iface->onLinkUp( link, nodeId, sourcenode );
726 i->second.markused();
727
728 return true ;
729
730 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeUpdate) )
731
732 //
733 // bye messages to say goodbye
734 //
735
736 else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeBye)){
737
738 logging_debug( "baseoverlay received message of type OverlayMessageTypeBye" );
739
740 logging_debug( "received bye message from " <<
741 overlayMsg->getSourceNode().toString() );
742
743 //
744 // if we are the initiator and receive a bye from a node
745 // the node just left. if we are a node and receive a bye
746 // from the initiator, we have to close, too.
747 //
748
749 if( overlayMsg->getSourceNode() == spovnetInitiator ){
750
751 bc.dropLink( initiatorLink );
752 initiatorLink = LinkID::UNSPECIFIED;
753 state = BaseOverlayStateInvalid;
754
755 logging_fatal( "initiator ended spovnet" );
756
757 // inform all registered services of the event
758 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
759 i->onOverlayDestroy( spovnetId );
760 }
761
762 } else {
763
764 // a node that said goodbye and we are the initiator
765 // don't have to do much here, as the node also
766 // will go out of the overlay structure
767 logging_info( "node left " << overlayMsg->getSourceNode() );
768
769 // inform all registered services of the event
770 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
771 i->onNodeLeave( overlayMsg->getSourceNode(), spovnetId );
772 }
773 }
774
775 return true;
776
777 } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeBye))
778
779 //
780 // something wrong ...
781 //
782
783 else {
784
785 logging_error( "received message in invalid state! don't know " <<
786 "what to do with this message of type " <<
787 overlayMsg->getType() );
788 return false;
789
790 } // else
791
792 return false;
793}
794
795void BaseOverlay::broadcastMessage(Message* message, const ServiceID& service){
796
797 logging_debug( "broadcasting message to all known nodes " <<
798 "in the overlay from service " + service.toString() );
799
800 OverlayInterface::NodeList nodes = overlayInterface->getKnownNodes();
801
802 OverlayInterface::NodeList::iterator i = nodes.begin();
803 OverlayInterface::NodeList::iterator iend = nodes.end();
804
805 for( ; i != iend; i++ ){
806 if( *i == nodeId) continue; // don't send to ourselfs
807 sendMessage( message, *i, service ); // TODO: sollte auto links aufbauen fÃŒr sowas
808 }
809}
810
811void BaseOverlay::updateOvlVis( const NodeID& n ) {
812 NodeID node = n;
813/* void visShowNodeBubble (
814 NETWORK_ID network,
815 NodeID& node,
816 string label
817 );
818*/
819 using namespace std;
820
821 if (node == nodeId || node.isUnspecified()) return;
822
823 // min/max
824 if ( node < min || min.isUnspecified() ) min = node;
825 if ( node > max || max.isUnspecified() ) max = node;
826
827 // successor
828 if ( succ.isUnspecified() || (node > nodeId && (succ < nodeId || (node-nodeId) < (succ-nodeId))) ) {
829 if (!succ.isUnspecified() && node != succ)
830 ovl.visDisconnect(ovlId, nodeId, succ, string(""));
831 succ = node;
832 ovl.visConnect(ovlId, nodeId, succ, string(""));
833 }
834
835 // set successor (circle-wrap)
836 if (succ.isUnspecified() && !min.isUnspecified()) {
837 succ = min;
838 ovl.visConnect(ovlId, nodeId, succ, string(""));
839 }
840}
841
842const NodeID& BaseOverlay::getNodeID(const LinkID& lid) const {
843
844 if( lid == LinkID::UNSPECIFIED ) return nodeId;
845
846 LinkMapping::const_iterator i = linkMapping.find( lid );
847 if( i == linkMapping.end() ) return NodeID::UNSPECIFIED;
848 else return i->second.node;
849}
850
851void BaseOverlay::incomingRouteMessage(Message* msg){
852 // gets handled as normal data message
853 // TODO: passt das so?
854 receiveMessage( msg, LinkID::UNSPECIFIED, NodeID::UNSPECIFIED );
855}
856
857void BaseOverlay::onNodeJoin(const NodeID& node){
858
859 JoiningNodes::iterator i = std::find( joiningNodes.begin(), joiningNodes.end(), node );
860 if( i == joiningNodes.end() ) return;
861
862 logging_info( "node has successfully joined baseoverlay and overlay structure "
863 << node.toString() );
864
865 BOOST_FOREACH( ServiceInterface* i, listenerMux.getOneList() ){
866 i->onNodeJoin( node, spovnetId );
867 }
868
869 joiningNodes.erase( i );
870}
871
872void BaseOverlay::eventFunction(){
873
874 list<LinkID> oldlinks;
875 time_t now = time(NULL);
876
877 // first gather all the links from linkMapping that need droppin
878 // don't directly drop, as the dropLink function affects the
879 // linkMapping structure that we are traversing here.
880 // drop links after a timeout of 30s
881
882 // the macro gets confused if type is passed directly
883 // because of the comma in the pair definition
884 typedef pair<LinkID,LinkItem> pairitem;
885
886 BOOST_FOREACH( pairitem item, linkMapping ){
887 if( item.second.autolink && difftime(now, item.second.lastuse) > 30)
888 oldlinks.push_back( item.first );
889 }
890
891 BOOST_FOREACH( const LinkID lnk, oldlinks ){
892 dropLink( lnk );
893 }
894}
895
896}} // namespace ariba, overlay
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