source: source/ariba/communication/BaseCommunication.h@ 5284

Last change on this file since 5284 was 5284, checked in by mies, 16 years ago

+ added new transport modules and adapted ariba to them
+ exchange endpoint descriptors an link establishment
+ clean up of base communication
+ link establishment with in the presence of multiple endpoints
+ local discovery for ipv6, ipv4 and bluetooth mac addresses
File size: 9.0 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 BASECOMMUNICATION_H_
40#define BASECOMMUNICATION_H_
41
42// boost & std includes
43#include <ext/hash_map>
44#include <ext/hash_set>
45#include <map>
46#include <set>
47#include <vector>
48#include <iostream>
49#include <algorithm>
50#include <boost/foreach.hpp>
51
52// utilities
53#include "ariba/utility/types.h"
54#include "ariba/utility/messages.h"
55#include "ariba/utility/logging/Logging.h"
56#include "ariba/utility/misc/Demultiplexer.hpp"
57#include "ariba/utility/system/SystemEventListener.h"
58
59// new transport and addressing
60#include "ariba/utility/addressing/addressing.hpp"
61#include "ariba/utility/transport/transport.hpp"
62
63// communication
64#include "ariba/communication/CommunicationEvents.h"
65#include "ariba/communication/EndpointDescriptor.h"
66#include "ariba/communication/messages/AribaBaseMsg.h"
67
68// network changes
69#include "ariba/communication/networkinfo/NetworkChangeInterface.h"
70#include "ariba/communication/networkinfo/NetworkChangeDetection.h"
71#include "ariba/communication/networkinfo/NetworkInformation.h"
72#include "ariba/communication/networkinfo/AddressInformation.h"
73
74// deprecated
75//#include "ariba/communication/modules/transport/TransportProtocol.h"
76//#include "ariba/communication/modules/network/NetworkProtocol.h"
77//#include "ariba/communication/modules/network/NetworkLocator.h"
78
79// disabled
80//#ifndef UNDERLAY_OMNET
81// #include "ariba/communication/modules/transport/tcp/TCPTransport.h"
82// #include "ariba/communication/modules/network/ip/IPv4NetworkProtocol.h"
83//#endif
84
85// deprecated
86//using ariba::communication::TransportProtocol;
87//using ariba::communication::NetworkProtocol;
88//using ariba::communication::NetworkLocator;
89
90// disabled
91//#ifndef UNDERLAY_OMNET
92// using ariba::communication::IPv4NetworkProtocol;
93// using ariba::communication::TCPTransport;
94//#endif
95
96namespace ariba {
97namespace communication {
98
99using namespace std;
100using namespace ariba::addressing;
101using namespace ariba::transport;
102using namespace ariba::utility;
103
104// use base ariba types (clarifies multiple definitions)
105using ariba::utility::Message;
106using ariba::utility::seqnum_t;
107
108/**
109 * This class implements the Ariba Base Communication<br />
110 *
111 * Its primary task is to provide an abstraction to existing
112 * protocols and addressing schemes.
113 *
114 * @author Sebastian Mies, Christoph Mayer
115 */
116class BaseCommunication: public NetworkChangeInterface,
117 public SystemEventListener, public transport_listener {
118 use_logging_h(BaseCommunication);
119
120public:
121 /// Default ctor that just creates an non-functional base communication
122 BaseCommunication();
123
124 /// Default dtor that does nothing
125 virtual ~BaseCommunication();
126
127 /// Startup the base communication, start modules etc.
128 void start();
129
130 /// Stops the base communication, stop modules etc.
131 void stop();
132
133 /// Sets the endpoints
134 void setEndpoints( string& endpoints );
135
136 /// Check whether the base communication has been started up
137 bool isStarted();
138
139 /// Establishes a link to another end-point.
140 const LinkID establishLink(const EndpointDescriptor& descriptor,
141 const LinkID& linkid = LinkID::UNSPECIFIED, const QoSParameterSet& qos =
142 QoSParameterSet::DEFAULT, const SecurityParameterSet& sec =
143 SecurityParameterSet::DEFAULT);
144
145 /// Drops a link
146 void dropLink(const LinkID link);
147
148 /**
149 * Sends a message though an existing link to an end-point.
150 *
151 * @param lid The link identifier
152 * @param message The message to be sent
153 * @return A sequence number for this message
154 */
155 seqnum_t sendMessage(const LinkID lid, const Message* message);
156
157 /**
158 * Returns the end-point descriptor
159 *
160 * @param link the link id of the requested end-point
161 * @return The end-point descriptor of the link's end-point
162 */
163 const EndpointDescriptor& getEndpointDescriptor(const LinkID link =
164 LinkID::UNSPECIFIED) const;
165
166 /**
167 * Get local links to the given endpoint of all local link
168 * using the default parameter EndpointDescriptor::UNSPECIFIED
169 * @param ep The remote endpoint to get all links to.
170 * @return List of LinkID
171 */
172 LinkIDs getLocalLinks(const address_v* addr) const;
173
174 /**
175 * Registers a receiver.
176 *
177 * @param _receiver The receiving side
178 */
179 void registerMessageReceiver(MessageReceiver* receiver) {
180 messageReceiver = receiver;
181 }
182
183 /**
184 * Unregister a receiver.
185 *
186 * @param _receiver The receiving side
187 */
188 void unregisterMessageReceiver(MessageReceiver* receiver) {
189 messageReceiver = NULL;
190 }
191
192 void registerEventListener(CommunicationEvents* _events);
193
194 void unregisterEventListener(CommunicationEvents* _events);
195
196public:
197
198 /// called when a system event is emitted by system queue
199 virtual void handleSystemEvent(const SystemEvent& event);
200
201 /// called when a message is received form transport_peer
202 virtual void receive_message(transport_protocol* transport,
203 const address_vf local, const address_vf remote, const uint8_t* data,
204 size_t size);
205
206protected:
207
208 /// handle received message from a transport module
209 void receiveMessage(const Message* message,
210 const address_v* local, const address_v* remote );
211
212 /// called when a network interface change happens
213 virtual void onNetworkChange(
214 const NetworkChangeInterface::NetworkChangeInfo& info);
215
216private:
217 /**
218 * A link descriptor consisting of the end-point descriptor and currently
219 * used underlay address.
220 */
221 class LinkDescriptor {
222 public:
223 static const LinkDescriptor UNSPECIFIED;
224
225 /// default constructor
226 LinkDescriptor() :
227 localLink(LinkID::UNSPECIFIED), localLocator(NULL),
228 remoteLink(LinkID::UNSPECIFIED), remoteLocator(NULL),
229 remoteEndpoint(EndpointDescriptor::UNSPECIFIED), up(false) {
230 }
231
232 ~LinkDescriptor() {
233 if (localLocator!=NULL) delete localLocator;
234 if (remoteLocator!=NULL) delete remoteLocator;
235 }
236
237 /// returns true if this is the UNSPECIFIED object
238 bool isUnspecified() const {
239 return this == &UNSPECIFIED;
240 }
241
242 /// link identifiers
243 LinkID localLink;
244 LinkID remoteLink;
245
246 /// used underlay addresses for the link
247 const address_v* localLocator;
248 const address_v* remoteLocator;
249
250 /// the remote end-point descriptor
251 EndpointDescriptor remoteEndpoint;
252
253 /// flag, whether this link is up
254 bool up;
255 };
256
257 /// Link management: list of links
258 typedef vector<LinkDescriptor*> LinkSet;
259
260 /// Link management: the set of currently managed links
261 LinkSet linkSet;
262
263 /// Link management: add a link
264 void addLink( LinkDescriptor* link );
265
266 /// Link management: remove a link
267 void removeLink(const LinkID& localLink);
268
269 /// Link management: get link information using the local link
270 LinkDescriptor& queryLocalLink(const LinkID& localLink) const;
271
272 /// Link management: get link information using the remote link
273 LinkDescriptor& queryRemoteLink(const LinkID& remoteLink) const;
274
275 /// The local end-point descriptor
276 EndpointDescriptor localDescriptor;
277
278#ifndef UNDERLAY_OMNET
279 /// network change detector
280 NetworkChangeDetection networkMonitor;
281#endif
282 /// event listener
283 typedef set<CommunicationEvents*> EventListenerSet;
284 EventListenerSet eventListener;
285
286 /// sequence numbers
287 seqnum_t currentSeqnum;
288
289 /// transport peer
290 transport_peer* transport;
291
292 /// the base overlay message receiver
293 MessageReceiver* messageReceiver;
294
295 /// convenience: send message to peer
296 void send( Message* message, const EndpointDescriptor& endpoint );
297 void send( Message* message, const LinkDescriptor& descriptor );
298
299 /// state of the base communication
300 bool started;
301
302};
303
304}} // namespace ariba, communication
305
306#endif /* BASECOMMUNICATION_H_ */
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