1 | // [License]
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2 | // The Ariba-Underlay Copyright
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3 | //
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4 | // Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
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5 | //
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6 | // Institute of Telematics
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7 | // UniversitÀt Karlsruhe (TH)
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8 | // Zirkel 2, 76128 Karlsruhe
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9 | // Germany
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10 | //
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11 | // Redistribution and use in source and binary forms, with or without
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12 | // modification, are permitted provided that the following conditions are
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13 | // met:
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14 | //
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15 | // 1. Redistributions of source code must retain the above copyright
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16 | // notice, this list of conditions and the following disclaimer.
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17 | // 2. Redistributions in binary form must reproduce the above copyright
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18 | // notice, this list of conditions and the following disclaimer in the
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19 | // documentation and/or other materials provided with the distribution.
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20 | //
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21 | // THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
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22 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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24 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
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25 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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27 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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28 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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29 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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30 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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31 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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32 | //
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33 | // The views and conclusions contained in the software and documentation
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34 | // are those of the authors and should not be interpreted as representing
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35 | // official policies, either expressed or implied, of the Institute of
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36 | // Telematics.
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37 | // [License]
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38 |
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39 | #ifndef BASEOVERLAY_H_
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40 | #define BASEOVERLAY_H_
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41 |
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42 | #include <map>
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43 | #include <iostream>
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44 | #include <algorithm>
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45 | #include <ctime>
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46 | #include <list>
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47 | #include <vector>
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48 | #include <deque>
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49 | #include <boost/foreach.hpp>
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50 |
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51 | #include "ariba/utility/messages.h"
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52 | #include "ariba/utility/types.h"
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53 | #include "ariba/utility/misc/Helper.h"
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54 | #include "ariba/utility/misc/Demultiplexer.hpp"
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55 | #include "ariba/utility/logging/Logging.h"
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56 | #include "ariba/utility/system/Timer.h"
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57 |
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58 | #include "ariba/communication/EndpointDescriptor.h"
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59 | #include "ariba/communication/BaseCommunication.h"
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60 | #include "ariba/communication/CommunicationEvents.h"
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61 |
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62 | #include "ariba/overlay/modules/OverlayInterface.h"
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63 | #include "ariba/overlay/modules/OverlayFactory.h"
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64 | #include "ariba/overlay/modules/OverlayStructureEvents.h"
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65 | #include "ariba/overlay/OverlayBootstrap.h"
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66 |
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67 | // forward declarations
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68 | namespace ariba {
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69 | class NodeListener;
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70 | class CommunicationListener;
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71 | class SideportListener;
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72 | }
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73 |
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74 | using std::vector;
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75 | using std::list;
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76 | using std::cout;
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77 | using std::map;
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78 | using std::make_pair;
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79 | using std::pair;
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80 | using std::find;
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81 | using std::deque;
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82 |
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83 | // ariba interface
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84 | using ariba::NodeListener;
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85 | using ariba::SideportListener;
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86 | using ariba::CommunicationListener;
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87 |
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88 | // overlay
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89 | using ariba::overlay::OverlayBootstrap;
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90 |
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91 | // communication
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92 | using ariba::communication::EndpointDescriptor;
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93 | using ariba::communication::BaseCommunication;
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94 | using ariba::communication::CommunicationEvents;
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95 |
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96 | // utilities
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97 | using ariba::utility::NodeID;
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98 | using ariba::utility::SpoVNetID;
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99 | using ariba::utility::LinkID;
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100 | using ariba::utility::Identifier;
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101 | using ariba::utility::ServiceID;
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102 | using ariba::utility::QoSParameterSet;
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103 | using ariba::utility::SecurityParameterSet;
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104 | using ariba::utility::Demultiplexer;
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105 | using ariba::utility::MessageReceiver;
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106 | using ariba::utility::MessageSender;
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107 | using ariba::utility::seqnum_t;
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108 | using ariba::utility::Timer;
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109 |
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110 | namespace ariba {
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111 | namespace overlay {
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112 |
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113 | using namespace ariba::addressing;
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114 |
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115 | class LinkDescriptor;
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116 | class OverlayMsg;
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117 | class DHT;
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118 |
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119 | class BaseOverlay: public MessageReceiver,
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120 | public CommunicationEvents,
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121 | public OverlayStructureEvents,
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122 | protected Timer {
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123 |
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124 | friend class OneHop;
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125 | friend class Chord;
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126 | friend class ariba::SideportListener;
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127 |
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128 | use_logging_h( BaseOverlay );
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129 |
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130 | public:
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131 |
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132 | /**
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133 | * Constructs an empty non-functional base overlay instance
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134 | */
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135 | BaseOverlay();
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136 |
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137 | /**
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138 | * Destructs a base overlay instance
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139 | */
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140 | virtual ~BaseOverlay();
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141 |
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142 | /**
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143 | * Starts the Base Overlay instance
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144 | */
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145 | void start(BaseCommunication& _basecomm, const NodeID& _nodeid);
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146 |
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147 | /**
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148 | * Stops the Base Overlay instance
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149 | */
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150 | void stop();
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151 |
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152 | /**
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153 | * Is the BaseOverlay instance started up yet
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154 | */
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155 | bool isStarted();
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156 |
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157 | /// Tries to establish a direct or overlay link
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158 | const LinkID establishLink( const EndpointDescriptor& ep,
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159 | const NodeID& node, const ServiceID& service );
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160 |
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161 | /**
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162 | * Starts a link establishment procedure to the specfied node
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163 | * for the service with id service
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164 | *
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165 | * @param node Destination node id
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166 | * @param service Service to connect to
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167 | * @param linkid Link identifier to be used with this link
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168 | */
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169 | const LinkID establishLink( const NodeID& remote,
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170 | const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID );
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171 |
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172 | /**
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173 | * Starts a link establishment procedure to the specified
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174 | * endpoint and to the specified service
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175 | */
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176 | const LinkID establishDirectLink( const EndpointDescriptor& endpoint,
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177 | const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID );
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178 |
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179 | /// drops a link
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180 | void dropLink( const LinkID& link );
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181 |
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182 | /// sends a message over an existing link
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183 | seqnum_t sendMessage(const Message* message, const LinkID& link );
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184 |
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185 | /// sends a message to a node and a specific service
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186 | seqnum_t sendMessage(const Message* message, const NodeID& remote,
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187 | const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID);
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188 |
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189 | /**
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190 | * Send out a message to all nodes that are known in the overlay structure.
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191 | * Depending on the structure of the overlay, this can be very different.
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192 | */
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193 | void broadcastMessage(Message* message, const ServiceID& service);
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194 |
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195 | /**
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196 | * Returns the end-point descriptor of a link.
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197 | *
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198 | * @param link the link id of the requested end-point
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199 | * @return The end-point descriptor of the link's end-point
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200 | */
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201 | const EndpointDescriptor& getEndpointDescriptor(
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202 | const LinkID& link = LinkID::UNSPECIFIED) const;
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203 |
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204 | /**
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205 | * Get a list of overlay neighbors.
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206 | *
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207 | * @return A list of overlay neighbors.
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208 | */
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209 | vector<NodeID> getOverlayNeighbors(bool deep = true) const;
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210 |
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211 | /**
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212 | * Returns a end-endpoint descriptor of a overlay neighbor.
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213 | * If the node is not known -- an unspecified endpoint descriptor is
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214 | * returned.
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215 | *
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216 | * @param node The node identifer of a overlay neighbor.
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217 | * @return The end-point descriptor of the node or unspecified.
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218 | */
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219 | const EndpointDescriptor& getEndpointDescriptor(const NodeID& node) const;
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220 |
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221 | // TODO: Doc
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222 | bool bind(CommunicationListener* listener, const ServiceID& sid);
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223 |
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224 | // TODO: Doc
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225 | bool unbind(CommunicationListener* listener, const ServiceID& sid);
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226 |
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227 | // TODO: Doc
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228 | bool bind(NodeListener* listener);
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229 |
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230 | // TODO: Doc
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231 | bool unbind(NodeListener* listener);
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232 |
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233 | // TODO: Doc
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234 | bool registerSidePort(SideportListener* _sideport);
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235 |
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236 | // TODO: Doc
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237 | bool unregisterSidePort(SideportListener* _sideport);
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238 |
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239 | /**
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240 | * Returns the own nodeID or the NodeID of the specified link
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241 | *
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242 | * @param lid The link identifier
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243 | * @return The NodeID of the link
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244 | */
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245 | const NodeID& getNodeID(const LinkID& lid = LinkID::UNSPECIFIED) const;
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246 |
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247 | /**
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248 | * Return all Links for the specified remote nodeid, or all links when
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249 | * the node id given is set to unspecified
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250 | *
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251 | * @param nid The node id to request links for, or unspecified for all links
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252 | * @return a vector that contains all the link ids requested
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253 | */
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254 | vector<LinkID> getLinkIDs(const NodeID& nid = NodeID::UNSPECIFIED) const;
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255 |
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256 | /**
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257 | * Join a existing sponaneous virtual network (spovnet).
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258 | *
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259 | * @param id A spovnet identifier
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260 | * @param boot A bootstrap node
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261 | */
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262 | void joinSpoVNet(const SpoVNetID& id, const EndpointDescriptor& boot = EndpointDescriptor::UNSPECIFIED());
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263 |
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264 | /**
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265 | * Initiates a new spontaneous virtual network.
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266 | * This makes this BaseOverlay to the SpoVNet-Initiator.
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267 | *
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268 | * @param id The spovnet identifier
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269 | */
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270 | void createSpoVNet(const SpoVNetID& id, const OverlayParameterSet& param =
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271 | OverlayParameterSet::DEFAULT, const SecurityParameterSet& sec =
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272 | SecurityParameterSet::DEFAULT, const QoSParameterSet& qos =
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273 | QoSParameterSet::DEFAULT);
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274 |
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275 | /**
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276 | * Let the node leave the SpoVNet.
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277 | */
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278 | void leaveSpoVNet();
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279 |
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280 | /// put a value to the DHT with a ttl given in seconds
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281 | void dhtPut( const Data& key, const Data& value, int ttl = 0, bool replace = false);
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282 |
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283 | /// removes a key value pair from the DHT
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284 | void dhtRemove( const Data& key, const Data& value );
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285 |
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286 | /// removes all data stored at the given key
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287 | void dhtRemove( const Data& key );
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288 |
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289 | /// requests data stored using key
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290 | void dhtGet( const Data& key, const ServiceID& service );
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291 |
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292 | protected:
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293 | /**
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294 | * @see ariba::communication::CommunicationEvents.h
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295 | */
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296 | virtual void onLinkUp(const LinkID& id, const address_v* local,
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297 | const address_v* remote);
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298 |
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299 | /**
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300 | * @see ariba::communication::CommunicationEvents.h
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301 | */
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302 | virtual void onLinkDown(const LinkID& id, const address_v* local,
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303 | const address_v* remote);
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304 |
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305 | /**
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306 | * @see ariba::communication::CommunicationEvents.h
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307 | */
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308 | virtual void onLinkChanged(const LinkID& id,
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309 | const address_v* oldlocal, const address_v* newlocal,
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310 | const address_v* oldremote, const address_v* newremote);
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311 |
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312 | /**
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313 | * @see ariba::communication::CommunicationEvents.h
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314 | */
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315 | virtual void onLinkFail(const LinkID& id, const address_v* local,
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316 | const address_v* remote);
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317 |
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318 | /**
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319 | * @see ariba::communication::CommunicationEvents.h
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320 | */
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321 | virtual void onLinkQoSChanged(const LinkID& id,
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322 | const address_v* local, const address_v* remote,
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323 | const QoSParameterSet& qos);
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324 |
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325 | /**
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326 | * @see ariba::communication::CommunicationEvents.h
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327 | */
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328 | virtual bool onLinkRequest(const LinkID& id, const address_v* local,
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329 | const address_v* remote);
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330 |
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331 | /**
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332 | * Processes a received message from BaseCommunication
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333 | *
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334 | * In case of a message routed by the overlay the source identifies
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335 | * the node the message came from!
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336 | */
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337 | virtual bool receiveMessage( const Message* message, const LinkID& link,
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338 | const NodeID& );
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339 |
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340 | /**
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341 | * This method is called, when a new node joined the network
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342 | *
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343 | * @see OverlayStructureEvents.h
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344 | */
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345 | virtual void onNodeJoin(const NodeID& node);
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346 |
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347 | /**
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348 | * Timer Event method
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349 | */
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350 | virtual void eventFunction();
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351 |
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352 | //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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353 |
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354 | std::string getLinkHTMLInfo();
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355 |
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356 | private:
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357 | /// is the base overlay started yet
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358 | bool started;
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359 |
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360 | /// The state of the BaseOverlay
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361 | typedef enum _BaseOverlayState {
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362 | BaseOverlayStateInvalid = 0,
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363 | BaseOverlayStateCompleted = 1,
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364 | } BaseOverlayState;
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365 |
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366 | BaseOverlayState state; ///< Current Base-Overlay state
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367 | BaseCommunication* bc; ///< reference to the base communication
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368 | NodeID nodeId; ///< the node id of this node
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369 | SpoVNetID spovnetId; ///< the spovnet id of the currently joined overlay
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370 | vector<LinkID> bootstrapLinks; ///< the link id of the link to the initiator node
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371 | NodeID spovnetInitiator; ///< The initiator node
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372 |
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373 | /// the service id communication listeners
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374 | Demultiplexer<CommunicationListener*, ServiceID> communicationListeners;
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375 | CommunicationListener* getListener( const ServiceID& id );
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376 |
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377 | /// the node listeners
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378 | typedef vector<NodeListener*> NodeListenerVector;
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379 | NodeListenerVector nodeListeners;
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380 |
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381 | /// the sideport listener
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382 | SideportListener* sideport;
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383 |
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384 | /// the used overlay structure
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385 | OverlayInterface* overlayInterface;
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386 |
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387 | /// Bootstrapper for our spovnet
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388 | OverlayBootstrap overlayBootstrap;
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389 |
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390 | // message handlers --------------------------------------------------------
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391 |
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392 | /// demultiplexes a incoming message with link descriptor
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393 | bool handleMessage( const Message* message, LinkDescriptor* ld,
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394 | const LinkID bcLink = LinkID::UNSPECIFIED );
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395 |
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396 | // handle data and signalling messages
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397 | bool handleData( OverlayMsg* msg, LinkDescriptor* ld );
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398 | bool handleSignaling( OverlayMsg* msg, LinkDescriptor* ld );
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399 |
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400 | // handle join request / reply messages
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401 | bool handleJoinRequest( OverlayMsg* msg, const LinkID& bcLink );
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402 | bool handleJoinReply( OverlayMsg* msg, const LinkID& bcLink );
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403 |
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404 | // handle DHT messages
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405 | bool handleDHTMessage( OverlayMsg* msg );
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406 |
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407 | // handle link messages
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408 | bool handleLinkRequest( OverlayMsg* msg, LinkDescriptor* ld );
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409 | bool handleLinkReply( OverlayMsg* msg, LinkDescriptor* ld );
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410 | bool handleLinkUpdate( OverlayMsg* msg, LinkDescriptor* ld );
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411 | bool handleLinkDirect( OverlayMsg* msg, LinkDescriptor* ld );
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412 | bool handleLinkAlive( OverlayMsg* msg, LinkDescriptor* ld );
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413 |
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414 |
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415 | // link state handling -----------------------------------------------------
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416 |
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417 | /// link state information counter
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418 | int counter;
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419 |
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420 | /// The link mapping of the node
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421 | vector<LinkDescriptor*> links;
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422 |
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423 | /// erases a link descriptor
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424 | void eraseDescriptor(const LinkID& link, bool communication = false);
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425 |
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426 | /// returns a link descriptor for the given id
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427 | LinkDescriptor* getDescriptor(const LinkID& link,
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428 | bool communication = false);
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429 |
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430 | /// returns a link descriptor for the given id
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431 | const LinkDescriptor* getDescriptor(const LinkID& link,
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432 | bool communication = false) const;
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433 |
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434 | /// returns a auto-link descriptor for the given node and service id
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435 | LinkDescriptor* getAutoDescriptor(const NodeID& node, const ServiceID& service);
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436 |
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437 | /// adds a new link descriptor or uses an existing one
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438 | LinkDescriptor* addDescriptor(const LinkID& link = LinkID::UNSPECIFIED);
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439 |
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440 | /// stabilizes link information
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441 | void stabilizeLinks();
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442 |
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443 | /// print the currently known links
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444 | void showLinks();
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445 |
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446 | /// compares two arbitrary links to the same node
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447 | int compare( const LinkID& lhs, const LinkID& rhs );
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448 |
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449 | // relay route management --------------------------------------------------
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450 |
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451 | /// relay route definitions
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452 | class relay_route {
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453 | public:
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454 | NodeID node;
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455 | LinkID link;
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456 | uint8_t hops;
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457 | time_t used;
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458 | };
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459 | vector<relay_route> relay_routes;
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460 |
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461 | /// stabilize relay information
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462 | void stabilizeRelays();
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463 |
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464 | /// refreshes relay information
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465 | void refreshRelayInformation( const OverlayMsg* message, LinkDescriptor* ld );
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466 |
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467 | /// returns a known relay link
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468 | LinkDescriptor* getRelayLinkTo( const NodeID& remote );
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469 |
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470 | /// removes relay link information
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471 | void removeRelayLink( const LinkID& link );
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472 |
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473 | /// removes relay node information
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474 | void removeRelayNode( const NodeID& link );
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475 |
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476 | // internal message delivery -----------------------------------------------
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477 |
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478 | /// routes a message to its destination node
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479 | void route( OverlayMsg* message );
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480 |
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481 | /// sends a raw message to another node, delivers it to the base overlay class
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482 | seqnum_t send( OverlayMsg* message, const NodeID& destination );
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483 |
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484 | /// send a raw message using a link descriptor, delivers it to the base overlay class
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485 | seqnum_t send( OverlayMsg* message, LinkDescriptor* ld,
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486 | bool ignore_down = false );
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487 |
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488 | /// send a message using a node id using overlay routing
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489 | /// sets necessary fields in the overlay message!
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490 | seqnum_t send_node( OverlayMsg* message, const NodeID& remote,
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491 | const ServiceID& service = OverlayInterface::OVERLAY_SERVICE_ID);
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492 |
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493 | /// send a message using a node id using overlay routing using a link
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494 | /// sets necessary fields in the overlay message!
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495 | seqnum_t send_link( OverlayMsg* message, const LinkID& link,
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496 | bool ignore_down = false );
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497 |
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498 | // distributed hashtable handling ------------------------------------------
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499 |
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500 | DHT* dht;
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501 | DHT* localDHT;
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502 |
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503 | void stabilizeDHT();
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504 | void dhtSend( OverlayMsg* msg, const NodeID& dest );
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505 |
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506 | // misc --------------------------------------------------------------------
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507 |
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508 | std::string debugInformation();
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509 |
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510 | /**
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511 | * nodes with pending joines. TODO: should be cleaned every
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512 | * some seconds, add timestamps to each, and check on occasion
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513 | */
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514 | typedef vector<NodeID> JoiningNodes;
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515 | JoiningNodes joiningNodes;
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516 |
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517 | void updateVisual();
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518 | };
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519 |
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520 | }} // namespace ariba, overlay
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521 |
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522 | #endif /*BASEOVERLAY_H_*/
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