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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 namespace utility {
73 class OvlVis;
74 }
75}
76
77using std::vector;
78using std::list;
79using std::cout;
80using std::map;
81using std::make_pair;
82using std::pair;
83using std::find;
84using std::deque;
85
86// ariba interface
87using ariba::NodeListener;
88using ariba::SideportListener;
89using ariba::CommunicationListener;
90
91// overlay
92using ariba::overlay::OverlayBootstrap;
93
94// communication
95using ariba::communication::EndpointDescriptor;
96using ariba::communication::BaseCommunication;
97using ariba::communication::CommunicationEvents;
98
99// utilities
100using ariba::utility::NodeID;
101using ariba::utility::SpoVNetID;
102using ariba::utility::LinkID;
103using ariba::utility::Identifier;
104using ariba::utility::ServiceID;
105using ariba::utility::QoSParameterSet;
106using ariba::utility::SecurityParameterSet;
107using ariba::utility::Demultiplexer;
108using ariba::utility::MessageReceiver;
109using ariba::utility::MessageSender;
110using ariba::utility::seqnum_t;
111using ariba::utility::Timer;
112using ariba::utility::OvlVis;
113
114//#define ovl OvlVis::instance()
115//#define ovlId OvlVis::NETWORK_ID_BASE_OVERLAY
116
117namespace ariba {
118namespace overlay {
119
120using namespace ariba::addressing;
121
122class LinkDescriptor;
123
124class BaseOverlay: public MessageReceiver,
125 public CommunicationEvents,
126 public OverlayStructureEvents,
127 protected Timer {
128
129 friend class OneHop;
130 friend class Chord;
131 friend class ariba::SideportListener;
132
133 use_logging_h( BaseOverlay );
134
135public:
136
137 /**
138 * Constructs an empty non-functional base overlay instance
139 */
140 BaseOverlay();
141
142 /**
143 * Destructs a base overlay instance
144 */
145 virtual ~BaseOverlay();
146
147 /**
148 * Starts the Base Overlay instance
149 */
150 void start(BaseCommunication& _basecomm, const NodeID& _nodeid);
151
152 /**
153 * Stops the Base Overlay instance
154 */
155 void stop();
156
157 /**
158 * Is the BaseOverlay instance started up yet
159 */
160 bool isStarted();
161
162 /**
163 * Starts a link establishment procedure to the specfied node
164 * for the service with id service
165 *
166 * @param node Destination node id
167 * @param service Service to connect to
168 * @param linkid Link identifier to be used with this link
169 */
170 const LinkID establishLink(const NodeID& node, const ServiceID& service,
171 const LinkID& linkid = LinkID::UNSPECIFIED);
172
173 /**
174 * Starts a link establishment procedure to the specified
175 * endpoint and to the specified service. Concurrently it tries to
176 * establish a relay link over the overlay using the nodeid
177 */
178 const LinkID establishLink(const EndpointDescriptor& ep, const NodeID& nodeid,
179 const ServiceID& service, const LinkID& linkid = LinkID::UNSPECIFIED);
180
181 /**
182 * Starts a link establishment procedure to the specified
183 * endpoint and to the specified service
184 */
185 const LinkID establishLink(const EndpointDescriptor& ep,
186 const ServiceID& service, const LinkID& linkid = LinkID::UNSPECIFIED);
187
188 /// drops a link
189 void dropLink(const LinkID& link);
190
191 /// sends a message over an existing link
192 seqnum_t sendMessage(const Message* message, const LinkID& link);
193
194 /// sends a message to a node and a specific service
195 seqnum_t sendMessage(const Message* message, const NodeID& node,
196 const ServiceID& service);
197
198 /**
199 * Send out a message to all nodes that are known in the overlay structure.
200 * Depending on the structure of the overlay, this can be very different.
201 */
202 void broadcastMessage(Message* message, const ServiceID& service);
203
204 /**
205 * Returns the end-point descriptor of a link.
206 *
207 * @param link the link id of the requested end-point
208 * @return The end-point descriptor of the link's end-point
209 */
210 const EndpointDescriptor& getEndpointDescriptor(const LinkID& link =
211 LinkID::UNSPECIFIED) const;
212
213 /**
214 * Get a list of overlay neighbors.
215 *
216 * @return A list of overlay neighbors.
217 */
218 vector<NodeID> getOverlayNeighbors(bool deep = true) const;
219
220 /**
221 * Returns a end-endpoint descriptor of a overlay neighbor.
222 * If the node is not known -- an unspecified endpoint descriptor is
223 * returned.
224 *
225 * @param node The node identifer of a overlay neighbor.
226 * @return The end-point descriptor of the node or unspecified.
227 */
228 const EndpointDescriptor& getEndpointDescriptor(const NodeID& node) const;
229
230 // TODO: Doc
231 bool bind(CommunicationListener* listener, const ServiceID& sid);
232
233 // TODO: Doc
234 bool unbind(CommunicationListener* listener, const ServiceID& sid);
235
236 // TODO: Doc
237 bool bind(NodeListener* listener);
238
239 // TODO: Doc
240 bool unbind(NodeListener* listener);
241
242 // TODO: Doc
243 bool registerSidePort(SideportListener* _sideport);
244
245 // TODO: Doc
246 bool unregisterSidePort(SideportListener* _sideport);
247
248 /**
249 * Returns the own nodeID or the NodeID of the specified link
250 *
251 * @param lid The link identifier
252 * @return The NodeID of the link
253 */
254 const NodeID& getNodeID(const LinkID& lid = LinkID::UNSPECIFIED) const;
255
256 /**
257 * Return all Links for the specified remote nodeid, or all links when
258 * the node id given is set to unspecified
259 *
260 * @param nid The node id to request links for, or unspecified for all links
261 * @return a vector that contains all the link ids requested
262 */
263 vector<LinkID> getLinkIDs(const NodeID& nid = NodeID::UNSPECIFIED) const;
264
265 /**
266 * Join a existing sponaneous virtual network (spovnet).
267 *
268 * @param id A spovnet identifier
269 * @param boot A bootstrap node
270 */
271 void joinSpoVNet(const SpoVNetID& id, const EndpointDescriptor& boot = EndpointDescriptor::UNSPECIFIED);
272
273 /**
274 * Initiates a new spontaneous virtual network.
275 * This makes this BaseOverlay to the SpoVNet-Initiator.
276 *
277 * @param id The spovnet identifier
278 */
279 void createSpoVNet(const SpoVNetID& id, const OverlayParameterSet& param =
280 OverlayParameterSet::DEFAULT, const SecurityParameterSet& sec =
281 SecurityParameterSet::DEFAULT, const QoSParameterSet& qos =
282 QoSParameterSet::DEFAULT);
283
284 /**
285 * Let the node leave the SpoVNet.
286 */
287 void leaveSpoVNet();
288
289protected:
290
291 /**
292 * @see ariba::communication::CommunicationEvents.h
293 */
294 virtual void onLinkUp(const LinkID& id, const address_v* local,
295 const address_v* remote);
296
297 /**
298 * @see ariba::communication::CommunicationEvents.h
299 */
300 virtual void onLinkDown(const LinkID& id, const address_v* local,
301 const address_v* remote);
302
303 /**
304 * @see ariba::communication::CommunicationEvents.h
305 */
306 virtual void onLinkChanged(const LinkID& id,
307 const address_v* oldlocal, const address_v* newlocal,
308 const address_v* oldremote, const address_v* newremote);
309
310 /**
311 * @see ariba::communication::CommunicationEvents.h
312 */
313 virtual void onLinkFail(const LinkID& id, const address_v* local,
314 const address_v* remote);
315
316 /**
317 * @see ariba::communication::CommunicationEvents.h
318 */
319 virtual void onLinkQoSChanged(const LinkID& id,
320 const address_v* local, const address_v* remote,
321 const QoSParameterSet& qos);
322
323 /**
324 * @see ariba::communication::CommunicationEvents.h
325 */
326 virtual bool onLinkRequest(const LinkID& id, const address_v* local,
327 const address_v* remote);
328
329 /**
330 * Processes a received message from BaseCommunication
331 *
332 * In case of a message routed by the overlay the source identifies
333 * the node the message came from!
334 */
335 virtual bool receiveMessage(const Message* message, const LinkID& link,
336 const NodeID& source = NodeID::UNSPECIFIED);
337
338 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
339
340 /// handles an incoming message with link descriptor
341 bool handleMessage(const Message* message,
342 const LinkID& boLink, const LinkID& bcLink, const NodeID& remoteNode );
343
344 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
345 /**
346 * This method is called, when a routed message arrives from the
347 * overlay.
348 *
349 * @see OverlayStructureEvents.h
350 */
351 virtual void incomingRouteMessage(Message* msg,
352 const LinkID& link = LinkID::UNSPECIFIED,
353 const NodeID& source = NodeID::UNSPECIFIED);
354
355 /**
356 * This method is called, when a new node joined the network
357 *
358 * @see OverlayStructureEvents.h
359 */
360 virtual void onNodeJoin(const NodeID& node);
361
362 /**
363 * Timer Event method
364 */
365 virtual void eventFunction();
366
367private:
368
369 /// The state of the BaseOverlay
370 typedef enum _BaseOverlayState {
371 BaseOverlayStateInvalid = 0,
372 BaseOverlayStateCompleted = 1,
373 } BaseOverlayState;
374
375 BaseOverlayState state; ///< Current Base-Overlay state
376 BaseCommunication* bc; ///< reference to the base communication
377 NodeID nodeId; ///< the node id of this node
378 SpoVNetID spovnetId; ///< the spovnet id of the currently joined overlay
379 vector<LinkID> bootstrapLinks; ///< the link id of the link to the initiator node
380 NodeID spovnetInitiator; ///< The initiator node
381
382 /// the service id communication listeners
383 Demultiplexer<CommunicationListener*, ServiceID> communicationListeners;
384
385 /// the node listeners
386 typedef vector<NodeListener*> NodeListenerVector;
387 NodeListenerVector nodeListeners;
388
389 /// the sideport listener
390 SideportListener* sideport;
391
392 /// the used overlay structure
393 OverlayInterface* overlayInterface;
394
395 /// The link mapping of the node
396 vector<LinkDescriptor*> links;
397 void eraseDescriptor(const LinkID& link, bool communication = false);
398
399 /// returns a link descriptor for the given id
400 LinkDescriptor* getDescriptor(const LinkID& link,
401 bool communication = false);
402
403 /// returns a link descriptor for the given id
404 const LinkDescriptor* getDescriptor(const LinkID& link,
405 bool communication = false) const;
406
407 /// returns a auto-link descriptor for the given node and service id
408 LinkDescriptor* getAutoDescriptor(const NodeID& node, const ServiceID& service);
409
410 /// adds a new link descriptor or uses an existing one
411 LinkDescriptor* addDescriptor(const LinkID& link = LinkID::UNSPECIFIED);
412
413 /// returns a direct link relay descriptor to the given relay node
414 LinkDescriptor* getRelayDescriptor( const NodeID& relayNode );
415
416 /// find a proper relay node that is directly connected to this node
417 const NodeID findRelayNode( const NodeID id );
418
419 /// forwards a message over relays/overlay/directly using link descriptor
420 seqnum_t sendMessage( Message* message, const LinkDescriptor* ld );
421
422 /// routes a message over the overlay or directly sends it when a link is open
423 seqnum_t sendOverlay( Message* message, const NodeID& nodeid );
424
425 /// creates a link descriptor, applys relay semantics if possible
426 LinkDescriptor* createLinkDescriptor(
427 const NodeID remoteNode, const ServiceID service, const LinkID link_id );
428
429 // map of a link request map a nonce to a LinkID
430 typedef map<const uint32_t, LinkID> PendingLinkMap;
431 PendingLinkMap pendingLinks;
432
433 void showLinkState();
434
435 /**
436 * nodes with pending joines. TODO: should be cleaned every
437 * some seconds, add timestamps to each, and check on occasion
438 */
439 typedef vector<NodeID> JoiningNodes;
440 JoiningNodes joiningNodes;
441
442 int counter;
443
444 /**
445 * Bootstrapper for our spovnet
446 */
447 OverlayBootstrap overlayBootstrap;
448
449 /// is the base overlay started yet
450 bool started;
451};
452
453}} // namespace ariba, overlay
454
455#endif /*BASEOVERLAY_H_*/
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