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source: source/ariba/overlay/BaseOverlay.h@ 9736

Last change on this file since 9736 was 7532, checked in by Christoph Mayer, 16 years ago

-von außen konfigurierbare bootstrap module, -periodicbroadcast crash fix
File size: 15.7 KB
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1// [License]
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// [License]
38
39#ifndef BASEOVERLAY_H_
40#define BASEOVERLAY_H_
41
42#include <map>
43#include <iostream>
44#include <algorithm>
45#include <ctime>
46#include <list>
47#include <vector>
48#include <deque>
49#include <boost/foreach.hpp>
50
51#include "ariba/utility/messages.h"
52#include "ariba/utility/types.h"
53#include "ariba/utility/misc/Helper.h"
54#include "ariba/utility/misc/Demultiplexer.hpp"
55#include "ariba/utility/logging/Logging.h"
56#include "ariba/utility/system/Timer.h"
57
58#include "ariba/communication/EndpointDescriptor.h"
59#include "ariba/communication/BaseCommunication.h"
60#include "ariba/communication/CommunicationEvents.h"
61
62#include "ariba/overlay/modules/OverlayInterface.h"
63#include "ariba/overlay/modules/OverlayFactory.h"
64#include "ariba/overlay/modules/OverlayStructureEvents.h"
65#include "ariba/overlay/OverlayBootstrap.h"
66
67// forward declarations
68namespace ariba {
69 class NodeListener;
70 class CommunicationListener;
71 class SideportListener;
72}
73
74using std::vector;
75using std::list;
76using std::cout;
77using std::map;
78using std::make_pair;
79using std::pair;
80using std::find;
81using std::deque;
82
83// ariba interface
84using ariba::NodeListener;
85using ariba::SideportListener;
86using ariba::CommunicationListener;
87
88// overlay
89using ariba::overlay::OverlayBootstrap;
90
91// communication
92using ariba::communication::EndpointDescriptor;
93using ariba::communication::BaseCommunication;
94using ariba::communication::CommunicationEvents;
95
96// utilities
97using ariba::utility::NodeID;
98using ariba::utility::SpoVNetID;
99using ariba::utility::LinkID;
100using ariba::utility::Identifier;
101using ariba::utility::ServiceID;
102using ariba::utility::QoSParameterSet;
103using ariba::utility::SecurityParameterSet;
104using ariba::utility::Demultiplexer;
105using ariba::utility::MessageReceiver;
106using ariba::utility::MessageSender;
107using ariba::utility::seqnum_t;
108using ariba::utility::Timer;
109
110namespace ariba {
111namespace overlay {
112
113using namespace ariba::addressing;
114
115class LinkDescriptor;
116class OverlayMsg;
117class DHT;
118
119class BaseOverlay: public MessageReceiver,
120 public CommunicationEvents,
121 public OverlayStructureEvents,
122 protected Timer {
123
124 friend class OneHop;
125 friend class Chord;
126 friend class ariba::SideportListener;
127
128 use_logging_h( BaseOverlay );
129
130public:
131
132 /**
133 * Constructs an empty non-functional base overlay instance
134 */
135 BaseOverlay();
136
137 /**
138 * Destructs a base overlay instance
139 */
140 virtual ~BaseOverlay();
141
142 /**
143 * Starts the Base Overlay instance
144 */
145 void start(BaseCommunication& _basecomm, const NodeID& _nodeid);
146
147 /**
148 * Stops the Base Overlay instance
149 */
150 void stop();
151
152 /**
153 * Is the BaseOverlay instance started up yet
154 */
155 bool isStarted();
156
157 /// Tries to establish a direct or overlay link
158 const LinkID establishLink( const EndpointDescriptor& ep,
159 const NodeID& node, const ServiceID& service );
160
161 /**
162 * Starts a link establishment procedure to the specfied node
163 * for the service with id service
164 *
165 * @param node Destination node id
166 * @param service Service to connect to
167 * @param linkid Link identifier to be used with this link
168 */
169 const LinkID establishLink( const NodeID& remote,
170 const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID );
171
172 /**
173 * Starts a link establishment procedure to the specified
174 * endpoint and to the specified service
175 */
176 const LinkID establishDirectLink( const EndpointDescriptor& endpoint,
177 const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID );
178
179 /// drops a link
180 void dropLink( const LinkID& link );
181
182 /// sends a message over an existing link
183 seqnum_t sendMessage(const Message* message, const LinkID& link );
184
185 /// sends a message to a node and a specific service
186 seqnum_t sendMessage(const Message* message, const NodeID& remote,
187 const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID);
188
189 /**
190 * Send out a message to all nodes that are known in the overlay structure.
191 * Depending on the structure of the overlay, this can be very different.
192 */
193 void broadcastMessage(Message* message, const ServiceID& service);
194
195 /**
196 * Returns the end-point descriptor of a link.
197 *
198 * @param link the link id of the requested end-point
199 * @return The end-point descriptor of the link's end-point
200 */
201 const EndpointDescriptor& getEndpointDescriptor(
202 const LinkID& link = LinkID::UNSPECIFIED) const;
203
204 /**
205 * Get a list of overlay neighbors.
206 *
207 * @return A list of overlay neighbors.
208 */
209 vector<NodeID> getOverlayNeighbors(bool deep = true) const;
210
211 /**
212 * Returns a end-endpoint descriptor of a overlay neighbor.
213 * If the node is not known -- an unspecified endpoint descriptor is
214 * returned.
215 *
216 * @param node The node identifer of a overlay neighbor.
217 * @return The end-point descriptor of the node or unspecified.
218 */
219 const EndpointDescriptor& getEndpointDescriptor(const NodeID& node) const;
220
221 // TODO: Doc
222 bool bind(CommunicationListener* listener, const ServiceID& sid);
223
224 // TODO: Doc
225 bool unbind(CommunicationListener* listener, const ServiceID& sid);
226
227 // TODO: Doc
228 bool bind(NodeListener* listener);
229
230 // TODO: Doc
231 bool unbind(NodeListener* listener);
232
233 // TODO: Doc
234 bool registerSidePort(SideportListener* _sideport);
235
236 // TODO: Doc
237 bool unregisterSidePort(SideportListener* _sideport);
238
239 /**
240 * Returns the own nodeID or the NodeID of the specified link
241 *
242 * @param lid The link identifier
243 * @return The NodeID of the link
244 */
245 const NodeID& getNodeID(const LinkID& lid = LinkID::UNSPECIFIED) const;
246
247 /**
248 * Return all Links for the specified remote nodeid, or all links when
249 * the node id given is set to unspecified
250 *
251 * @param nid The node id to request links for, or unspecified for all links
252 * @return a vector that contains all the link ids requested
253 */
254 vector<LinkID> getLinkIDs(const NodeID& nid = NodeID::UNSPECIFIED) const;
255
256 /**
257 * Join a existing sponaneous virtual network (spovnet).
258 *
259 * @param id A spovnet identifier
260 * @param boot A bootstrap node
261 */
262 void joinSpoVNet(const SpoVNetID& id, const EndpointDescriptor& boot = EndpointDescriptor::UNSPECIFIED());
263
264 /**
265 * Initiates a new spontaneous virtual network.
266 * This makes this BaseOverlay to the SpoVNet-Initiator.
267 *
268 * @param id The spovnet identifier
269 */
270 void createSpoVNet(const SpoVNetID& id, const OverlayParameterSet& param =
271 OverlayParameterSet::DEFAULT, const SecurityParameterSet& sec =
272 SecurityParameterSet::DEFAULT, const QoSParameterSet& qos =
273 QoSParameterSet::DEFAULT);
274
275 /**
276 * Start the bootstrap modules
277 */
278 void startBootstrapModules(vector<pair<BootstrapManager::BootstrapType,string> > modules);
279
280 /**
281 * Stop the bootstrap modules
282 */
283 void stopBootstrapModules();
284
285 /**
286 * Let the node leave the SpoVNet.
287 */
288 void leaveSpoVNet();
289
290 /// put a value to the DHT with a ttl given in seconds
291 void dhtPut( const Data& key, const Data& value, int ttl = 0, bool replace = false, bool no_local_refresh = false);
292
293 /// removes a key value pair from the DHT
294 void dhtRemove( const Data& key, const Data& value );
295
296 /// removes all data stored at the given key
297 void dhtRemove( const Data& key );
298
299 /// requests data stored using key
300 void dhtGet( const Data& key, const ServiceID& service );
301
302protected:
303 /**
304 * @see ariba::communication::CommunicationEvents.h
305 */
306 virtual void onLinkUp(const LinkID& id, const address_v* local,
307 const address_v* remote);
308
309 /**
310 * @see ariba::communication::CommunicationEvents.h
311 */
312 virtual void onLinkDown(const LinkID& id, const address_v* local,
313 const address_v* remote);
314
315 /**
316 * @see ariba::communication::CommunicationEvents.h
317 */
318 virtual void onLinkChanged(const LinkID& id,
319 const address_v* oldlocal, const address_v* newlocal,
320 const address_v* oldremote, const address_v* newremote);
321
322 /**
323 * @see ariba::communication::CommunicationEvents.h
324 */
325 virtual void onLinkFail(const LinkID& id, const address_v* local,
326 const address_v* remote);
327
328 /**
329 * @see ariba::communication::CommunicationEvents.h
330 */
331 virtual void onLinkQoSChanged(const LinkID& id,
332 const address_v* local, const address_v* remote,
333 const QoSParameterSet& qos);
334
335 /**
336 * @see ariba::communication::CommunicationEvents.h
337 */
338 virtual bool onLinkRequest(const LinkID& id, const address_v* local,
339 const address_v* remote);
340
341 /**
342 * Processes a received message from BaseCommunication
343 *
344 * In case of a message routed by the overlay the source identifies
345 * the node the message came from!
346 */
347 virtual bool receiveMessage( const Message* message, const LinkID& link,
348 const NodeID& );
349
350 /**
351 * This method is called, when a new node joined the network
352 *
353 * @see OverlayStructureEvents.h
354 */
355 virtual void onNodeJoin(const NodeID& node);
356
357 /**
358 * Timer Event method
359 */
360 virtual void eventFunction();
361
362 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
363
364 std::string getLinkHTMLInfo();
365
366private:
367 /// is the base overlay started yet
368 bool started;
369
370 /// The state of the BaseOverlay
371 typedef enum _BaseOverlayState {
372 BaseOverlayStateInvalid = 0,
373 BaseOverlayStateCompleted = 1,
374 } BaseOverlayState;
375
376 BaseOverlayState state; ///< Current Base-Overlay state
377 BaseCommunication* bc; ///< reference to the base communication
378 NodeID nodeId; ///< the node id of this node
379 SpoVNetID spovnetId; ///< the spovnet id of the currently joined overlay
380 vector<LinkID> bootstrapLinks; ///< the link id of the link to the initiator node
381 NodeID spovnetInitiator; ///< The initiator node
382
383 /// the service id communication listeners
384 Demultiplexer<CommunicationListener*, ServiceID> communicationListeners;
385 CommunicationListener* getListener( const ServiceID& id );
386
387 /// the node listeners
388 typedef vector<NodeListener*> NodeListenerVector;
389 NodeListenerVector nodeListeners;
390
391 /// the sideport listener
392 SideportListener* sideport;
393
394 /// the used overlay structure
395 OverlayInterface* overlayInterface;
396
397 /// Bootstrapper for our spovnet
398 OverlayBootstrap overlayBootstrap;
399
400 // message handlers --------------------------------------------------------
401
402 /// demultiplexes a incoming message with link descriptor
403 bool handleMessage( const Message* message, LinkDescriptor* ld,
404 const LinkID bcLink = LinkID::UNSPECIFIED );
405
406 // handle data and signalling messages
407 bool handleData( OverlayMsg* msg, LinkDescriptor* ld );
408 bool handleSignaling( OverlayMsg* msg, LinkDescriptor* ld );
409
410 // handle join request / reply messages
411 bool handleJoinRequest( OverlayMsg* msg, const LinkID& bcLink );
412 bool handleJoinReply( OverlayMsg* msg, const LinkID& bcLink );
413
414 // handle DHT messages
415 bool handleDHTMessage( OverlayMsg* msg );
416
417 // handle link messages
418 bool handleLinkRequest( OverlayMsg* msg, LinkDescriptor* ld );
419 bool handleLinkReply( OverlayMsg* msg, LinkDescriptor* ld );
420 bool handleLinkUpdate( OverlayMsg* msg, LinkDescriptor* ld );
421 bool handleLinkDirect( OverlayMsg* msg, LinkDescriptor* ld );
422 bool handleLinkAlive( OverlayMsg* msg, LinkDescriptor* ld );
423
424
425 // link state handling -----------------------------------------------------
426
427 /// link state information counter
428 int counter;
429
430 /// The link mapping of the node
431 vector<LinkDescriptor*> links;
432
433 /// erases a link descriptor
434 void eraseDescriptor(const LinkID& link, bool communication = false);
435
436 /// returns a link descriptor for the given id
437 LinkDescriptor* getDescriptor(const LinkID& link,
438 bool communication = false);
439
440 /// returns a link descriptor for the given id
441 const LinkDescriptor* getDescriptor(const LinkID& link,
442 bool communication = false) const;
443
444 /// returns a auto-link descriptor for the given node and service id
445 LinkDescriptor* getAutoDescriptor(const NodeID& node, const ServiceID& service);
446
447 /// adds a new link descriptor or uses an existing one
448 LinkDescriptor* addDescriptor(const LinkID& link = LinkID::UNSPECIFIED);
449
450 /// stabilizes link information
451 void stabilizeLinks();
452
453 /// print the currently known links
454 void showLinks();
455
456 /// compares two arbitrary links to the same node
457 int compare( const LinkID& lhs, const LinkID& rhs );
458
459 // relay route management --------------------------------------------------
460
461 /// relay route definitions
462 class relay_route {
463 public:
464 NodeID node;
465 LinkID link;
466 uint8_t hops;
467 time_t used;
468 };
469 vector<relay_route> relay_routes;
470
471 /// stabilize relay information
472 void stabilizeRelays();
473
474 /// refreshes relay information
475 void refreshRelayInformation( const OverlayMsg* message, LinkDescriptor* ld );
476
477 /// returns a known relay link
478 LinkDescriptor* getRelayLinkTo( const NodeID& remote );
479
480 /// removes relay link information
481 void removeRelayLink( const LinkID& link );
482
483 /// removes relay node information
484 void removeRelayNode( const NodeID& link );
485
486 // internal message delivery -----------------------------------------------
487
488 /// routes a message to its destination node
489 void route( OverlayMsg* message );
490
491 /// sends a raw message to another node, delivers it to the base overlay class
492 seqnum_t send( OverlayMsg* message, const NodeID& destination );
493
494 /// send a raw message using a link descriptor, delivers it to the base overlay class
495 seqnum_t send( OverlayMsg* message, LinkDescriptor* ld,
496 bool ignore_down = false );
497
498 /// send a message using a node id using overlay routing
499 /// sets necessary fields in the overlay message!
500 seqnum_t send_node( OverlayMsg* message, const NodeID& remote,
501 const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID);
502
503 /// send a message using a node id using overlay routing using a link
504 /// sets necessary fields in the overlay message!
505 seqnum_t send_link( OverlayMsg* message, const LinkID& link,
506 bool ignore_down = false );
507
508 // distributed hashtable handling ------------------------------------------
509
510 DHT* dht;
511 DHT* localDHT;
512 int republishCounter;
513
514 void initDHT();
515 void destroyDHT();
516 void stabilizeDHT();
517 void dhtSend( OverlayMsg* msg, const NodeID& dest );
518
519 // misc --------------------------------------------------------------------
520
521 std::string debugInformation();
522
523 /**
524 * nodes with pending joines. TODO: should be cleaned every
525 * some seconds, add timestamps to each, and check on occasion
526 */
527 typedef vector<NodeID> JoiningNodes;
528 JoiningNodes joiningNodes;
529
530 void updateVisual();
531};
532
533}} // namespace ariba, overlay
534
535#endif /*BASEOVERLAY_H_*/
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