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 | #include "BaseOverlay.h"
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40 |
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41 | #include <sstream>
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42 | #include <iostream>
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43 | #include <string>
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44 | #include <boost/foreach.hpp>
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45 |
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46 | #include "ariba/NodeListener.h"
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47 | #include "ariba/CommunicationListener.h"
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48 | #include "ariba/SideportListener.h"
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49 |
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50 | #include "ariba/overlay/LinkDescriptor.h"
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51 | #include "ariba/overlay/messages/OverlayMsg.h"
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52 | #include "ariba/overlay/messages/JoinRequest.h"
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53 | #include "ariba/overlay/messages/JoinReply.h"
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54 | #include "ariba/overlay/messages/LinkRequest.h"
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55 | #include "ariba/overlay/messages/RelayMessage.h"
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56 |
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57 | #include "ariba/utility/misc/OvlVis.h"
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58 |
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59 | namespace ariba {
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60 | namespace overlay {
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61 |
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62 | LinkDescriptor* BaseOverlay::getDescriptor( const LinkID& link, bool communication ) {
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63 | BOOST_FOREACH( LinkDescriptor* lp, links )
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64 | if ((communication ? lp->communicationId : lp->overlayId) == link)
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65 | return lp;
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66 | return NULL;
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67 | }
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68 |
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69 | const LinkDescriptor* BaseOverlay::getDescriptor( const LinkID& link, bool communication ) const {
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70 | BOOST_FOREACH( const LinkDescriptor* lp, links )
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71 | if ((communication ? lp->communicationId : lp->overlayId) == link)
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72 | return lp;
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73 | return NULL;
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74 | }
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75 |
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76 | LinkDescriptor* BaseOverlay::getAutoDescriptor( const NodeID& node, const ServiceID& service ) {
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77 | BOOST_FOREACH( LinkDescriptor* lp, links )
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78 | if (lp->autolink && lp->remoteNode == node && lp->service == service)
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79 | return lp;
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80 | return NULL;
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81 | }
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82 |
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83 | void BaseOverlay::eraseDescriptor( const LinkID& link, bool communication ) {
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84 | for ( vector<LinkDescriptor*>::iterator i = links.begin(); i!= links.end(); i++) {
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85 | LinkDescriptor* ld = *i;
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86 | if ((communication ? ld->communicationId : ld->overlayId) == link) {
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87 | delete ld;
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88 | links.erase(i);
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89 | break;
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90 | }
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91 | }
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92 | }
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93 |
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94 | LinkDescriptor* BaseOverlay::addDescriptor( const LinkID& link ) {
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95 | LinkDescriptor* desc = getDescriptor( link );
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96 | if ( desc == NULL ) {
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97 | desc = new LinkDescriptor();
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98 | desc->overlayId = link;
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99 | links.push_back(desc);
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100 | }
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101 | return desc;
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102 | }
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103 |
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104 | /// returns a direct link relay descriptor to the given relay node
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105 | LinkDescriptor* BaseOverlay::getRelayDescriptor( const NodeID& relayNode ) {
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106 | BOOST_FOREACH( LinkDescriptor* lp, links )
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107 | if (lp->remoteNode == relayNode &&
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108 | lp->service == OverlayInterface::OVERLAY_SERVICE_ID &&
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109 | lp->relay == false &&
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110 | lp->up)
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111 | return lp;
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112 | return NULL;
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113 | }
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114 |
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115 | /// find a proper relay node
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116 | const NodeID BaseOverlay::findRelayNode( const NodeID id ) {
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117 | LinkDescriptor* rld = NULL;
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118 | NodeID relayNode = NodeID::UNSPECIFIED;
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119 |
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120 | // get used next hop towards node
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121 | LinkID rlid = overlayInterface->getNextLinkId(id);
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122 | while ( relayNode.isUnspecified() && !rlid.isUnspecified() && rld == NULL ) {
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123 |
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124 | // get descriptor of first hop
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125 | rld = getDescriptor(rlid);
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126 | logging_force( rld );
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127 |
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128 | // is first hop a relay path? yes-> try to find real link!
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129 | if ( rld->relay )
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130 | relayNode = getRelayDescriptor(rld->localRelay)->remoteNode;
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131 |
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132 | // no-> a proper relay node has been found
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133 | else relayNode = rld->remoteNode;
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134 | }
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135 |
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136 | // if first relay is unknown choose a arbitrary direct node as relay
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137 | if ( relayNode.isUnspecified() ) {
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138 | for (size_t i=0; i<links.size(); i++)
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139 | if (links[i]->up &&
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140 | links[i]->communicationUp &&
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141 | !links[i]->relay &&
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142 | links[i]->keepAliveMissed <= 1 &&
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143 | links[i]->service == OverlayInterface::OVERLAY_SERVICE_ID) {
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144 | relayNode = links[i]->remoteNode;
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145 | break;
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146 | }
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147 | }
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148 |
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149 | // do not return myself or use the node as relay node
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150 | if (relayNode == nodeId)
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151 | return NodeID::UNSPECIFIED;
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152 | else {
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153 | logging_force( "Returning relay node " << relayNode.toString() );
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154 | return relayNode;
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155 | }
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156 | }
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157 |
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158 | /// forwards a message over relays/directly using link descriptor
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159 | seqnum_t BaseOverlay::sendMessage( Message* message, const LinkDescriptor* ld ) {
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160 |
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161 | // directly send message
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162 | if ( !ld->communicationId.isUnspecified() && ld->communicationUp ) {
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163 | logging_debug("Send: Sending message via Base Communication");
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164 | return bc->sendMessage( ld->communicationId, message );
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165 | }
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166 |
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167 | // relay message
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168 | else if ( ld->relay ) {
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169 |
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170 | logging_debug("Send: Relaying message to node "
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171 | << ld->remoteNode.toString()
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172 | << " using relay " << ld->localRelay
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173 | );
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174 | /*
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175 | // get local relay link descriptor and mark as used for relaying
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176 | LinkDescriptor* rld = getRelayDescriptor(ld->localRelay);
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177 | if (rld==NULL) {
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178 | logging_error("Send: Relay descriptor for relay " <<
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179 | ld->localRelay.toString() << " is unknown.");
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180 | return -1;
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181 | }
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182 | rld->markAsRelay();*/
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183 |
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184 | // create a information relay message to inform the relay about
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185 | OverlayMsg overlay_msg( OverlayMsg::typeRelay, ld->service, nodeId );
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186 | RelayMessage relayMsg( RelayMessage::typeInform, ld->remoteRelay, ld->remoteNode, ld->remoteLinkId );
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187 | relayMsg.encapsulate( message );
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188 | overlay_msg.encapsulate( &relayMsg );
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189 |
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190 | // route message to relay node in order to inform it!
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191 | logging_debug("sendMessage: Sending message over relayed link with" << ld );
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192 | sendOverlay( &overlay_msg, ld->localRelay );
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193 | return 0;
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194 | }
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195 |
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196 | // error
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197 | else {
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198 | logging_error( "Could not send message descriptor=" << ld );
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199 | return -1;
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200 | }
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201 | return -1;
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202 | }
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203 |
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204 | /// routes a message over the overlay or directly sends it when a link is open
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205 | seqnum_t BaseOverlay::sendOverlay( Message* message, const NodeID& nodeid ) {
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206 | for (size_t i=0; i<links.size(); i++)
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207 | if ( !links[i]->relay &&
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208 | links[i]->up &&
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209 | links[i]->communicationUp &&
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210 | links[i]->keepAliveMissed <= 1 &&
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211 | links[i]->remoteNode == nodeid &&
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212 | links[i]->service == OverlayInterface::OVERLAY_SERVICE_ID) {
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213 | links[i]->markAsRelay();
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214 | return sendMessage( message, links[i] );
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215 | break;
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216 | }
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217 | overlayInterface->routeMessage(nodeid, message);
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218 | return 0;
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219 | }
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220 |
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221 | /// creates a link descriptor, apply relay semantics if possible
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222 | LinkDescriptor* BaseOverlay::createLinkDescriptor(
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223 | const NodeID remoteNode, const ServiceID service, const LinkID link_id ) {
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224 |
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225 | // find listener
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226 | if( !communicationListeners.contains( service ) ) {
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227 | logging_error( "No listener found for service " << service.toString() );
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228 | return NULL;
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229 | }
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230 | CommunicationListener* listener = communicationListeners.get( service );
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231 | assert( listener != NULL );
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232 |
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233 | // copy link id
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234 | LinkID linkid = link_id;
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235 |
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236 | // create link id if necessary
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237 | if ( linkid.isUnspecified() )
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238 | linkid = LinkID::create();
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239 |
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240 | // create relay link descriptor
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241 | NodeID relayNode = findRelayNode(remoteNode);
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242 |
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243 | // add descriptor
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244 | LinkDescriptor* ld = addDescriptor( linkid );
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245 | ld->overlayId = linkid;
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246 | ld->service = service;
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247 | ld->listener = listener;
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248 | ld->remoteNode = remoteNode;
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249 |
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250 | // set relay node if available
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251 | ld->relay = !relayNode.isUnspecified();
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252 | ld->localRelay = relayNode;
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253 |
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254 | if (!ld->relay)
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255 | logging_error("No relay found!");
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256 |
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257 | // debug output
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258 | logging_debug( "Created link descriptor: " << ld );
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259 |
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260 | return ld;
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261 | }
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262 |
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263 |
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264 | // ----------------------------------------------------------------------------
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265 |
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266 | use_logging_cpp(BaseOverlay);
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267 |
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268 | // ----------------------------------------------------------------------------
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269 |
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270 | BaseOverlay::BaseOverlay() :
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271 | bc(NULL), overlayInterface(NULL), nodeId(NodeID::UNSPECIFIED),
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272 | spovnetId(SpoVNetID::UNSPECIFIED), state(BaseOverlayStateInvalid),
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273 | sideport(&SideportListener::DEFAULT), started(false), counter(0) {
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274 | }
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275 |
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276 | BaseOverlay::~BaseOverlay() {
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277 | }
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278 |
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279 | // ----------------------------------------------------------------------------
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280 |
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281 | void BaseOverlay::start( BaseCommunication& _basecomm, const NodeID& _nodeid ) {
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282 | logging_info("Starting...");
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283 |
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284 | // set parameters
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285 | bc = &_basecomm;
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286 | nodeId = _nodeid;
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287 |
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288 | // register at base communication
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289 | bc->registerMessageReceiver( this );
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290 | bc->registerEventListener( this );
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291 |
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292 | // timer for auto link management
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293 | Timer::setInterval( 500 );
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294 | Timer::start();
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295 |
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296 | started = true;
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297 | state = BaseOverlayStateInvalid;
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298 | }
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299 |
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300 | void BaseOverlay::stop() {
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301 | logging_info("Stopping...");
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302 |
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303 | // stop timer
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304 | Timer::stop();
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305 |
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306 | // delete oberlay interface
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307 | if(overlayInterface != NULL) {
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308 | delete overlayInterface;
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309 | overlayInterface = NULL;
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310 | }
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311 |
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312 | // unregister at base communication
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313 | bc->unregisterMessageReceiver( this );
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314 | bc->unregisterEventListener( this );
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315 |
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316 | started = false;
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317 | state = BaseOverlayStateInvalid;
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318 | }
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319 |
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320 | bool BaseOverlay::isStarted(){
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321 | return started;
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322 | }
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323 |
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324 | // ----------------------------------------------------------------------------
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325 |
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326 | void BaseOverlay::joinSpoVNet(const SpoVNetID& id,
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327 | const EndpointDescriptor& bootstrapEp) {
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328 |
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329 | if(id != spovnetId){
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330 | logging_error("attempt to join against invalid spovnet, call initiate first");
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331 | return;
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332 | }
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333 |
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334 |
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335 | //ovl.visShowNodeBubble ( ovlId, nodeId, "joining..." );
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336 | logging_info( "Starting to join spovnet " << id.toString() <<
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337 | " with nodeid " << nodeId.toString());
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338 |
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339 | if(bootstrapEp.isUnspecified() && state == BaseOverlayStateInvalid){
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340 |
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341 | // bootstrap against ourselfs
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342 | logging_debug("joining spovnet locally");
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343 |
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344 | overlayInterface->joinOverlay();
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345 | state = BaseOverlayStateCompleted;
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346 | BOOST_FOREACH( NodeListener* i, nodeListeners )
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347 | i->onJoinCompleted( spovnetId );
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348 |
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349 | //ovl.visChangeNodeIcon ( ovlId, nodeId, OvlVis::ICON_ID_CAMERA );
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350 | //ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN );
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351 |
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352 | logging_debug("starting overlay bootstrap module");
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353 | overlayBootstrap.start(this, spovnetId, nodeId);
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354 | overlayBootstrap.publish(bc->getEndpointDescriptor());
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355 |
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356 | } else {
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357 |
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358 | // bootstrap against another node
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359 | logging_debug("joining spovnet remotely against " << bootstrapEp.toString());
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360 |
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361 | const LinkID& lnk = bc->establishLink( bootstrapEp );
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362 | bootstrapLinks.push_back(lnk);
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363 | logging_info("join process initiated for " << id.toString() << "...");
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364 | }
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365 | }
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366 |
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367 | void BaseOverlay::leaveSpoVNet() {
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368 |
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369 | logging_info( "Leaving spovnet " << spovnetId );
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370 | bool ret = ( state != this->BaseOverlayStateInvalid );
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371 |
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372 | logging_debug("stopping overlay bootstrap module");
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373 | overlayBootstrap.stop();
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374 | overlayBootstrap.revoke();
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375 |
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376 | logging_debug( "Dropping all auto-links" );
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377 |
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378 | // gather all service links
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379 | vector<LinkID> servicelinks;
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380 | BOOST_FOREACH( LinkDescriptor* ld, links ) {
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381 | if( ld->service != OverlayInterface::OVERLAY_SERVICE_ID )
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382 | servicelinks.push_back( ld->overlayId );
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383 | }
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384 |
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385 | // drop all service links
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386 | BOOST_FOREACH( LinkID lnk, servicelinks )
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387 | dropLink( lnk );
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388 |
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389 | // let the node leave the spovnet overlay interface
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390 | logging_debug( "Leaving overlay" );
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391 | if( overlayInterface != NULL )
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392 | overlayInterface->leaveOverlay();
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393 |
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394 | // drop still open bootstrap links
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395 | BOOST_FOREACH( LinkID lnk, bootstrapLinks )
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396 | bc->dropLink( lnk );
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397 |
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398 | // change to inalid state
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399 | state = BaseOverlayStateInvalid;
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400 | //ovl.visShutdown( ovlId, nodeId, string("") );
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401 |
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402 | // inform all registered services of the event
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403 | BOOST_FOREACH( NodeListener* i, nodeListeners ) {
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404 | if( ret ) i->onLeaveCompleted( spovnetId );
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405 | else i->onLeaveFailed( spovnetId );
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406 | }
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407 | }
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408 |
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409 | void BaseOverlay::createSpoVNet(const SpoVNetID& id,
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410 | const OverlayParameterSet& param,
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411 | const SecurityParameterSet& sec,
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412 | const QoSParameterSet& qos) {
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413 |
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414 | // set the state that we are an initiator, this way incoming messages are
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415 | // handled correctly
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416 | logging_info( "creating spovnet " + id.toString() <<
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417 | " with nodeid " << nodeId.toString() );
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418 |
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419 | spovnetId = id;
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420 |
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421 | overlayInterface = OverlayFactory::create( *this, param, nodeId, this );
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422 | if( overlayInterface == NULL ) {
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423 | logging_fatal( "overlay structure not supported" );
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424 | state = BaseOverlayStateInvalid;
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425 |
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426 | BOOST_FOREACH( NodeListener* i, nodeListeners )
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427 | i->onJoinFailed( spovnetId );
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428 |
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429 | return;
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430 | }
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431 | }
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432 |
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433 | // ----------------------------------------------------------------------------
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434 |
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435 | const LinkID BaseOverlay::establishLink(
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436 | const EndpointDescriptor& ep, const NodeID& nodeid,
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437 | const ServiceID& service, const LinkID& linkid ) {
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438 |
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439 | LinkID link_id = linkid;
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440 |
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441 | // establish link via overlay
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442 | if (!nodeid.isUnspecified())
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443 | link_id = establishLink( nodeid, service, link_id );
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444 |
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445 | // establish link directly if only ep is known
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446 | if (nodeid.isUnspecified())
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447 | establishLink( ep, service, link_id );
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448 |
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449 | return link_id;
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450 | }
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451 |
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452 | /// call base communication's establish link and add link mapping
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453 | const LinkID BaseOverlay::establishLink( const EndpointDescriptor& ep,
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454 | const ServiceID& service, const LinkID& linkid ) {
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455 |
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456 | // create a new link id if necessary
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457 | LinkID link_id = linkid;
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458 | if (link_id.isUnspecified()) link_id = LinkID::create();
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459 |
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460 | /// find a service listener
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461 | if( !communicationListeners.contains( service ) ) {
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462 | logging_error( "No listener registered for service id=" << service.toString() );
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463 | return LinkID::UNSPECIFIED;
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464 | }
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465 | CommunicationListener* listener = communicationListeners.get( service );
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466 | assert( listener != NULL );
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467 |
|
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468 | /// establish link and add mapping
|
---|
469 | logging_info("Establishing direct link " << link_id.toString()
|
---|
470 | << " using " << ep.toString());
|
---|
471 |
|
---|
472 | // create descriptor
|
---|
473 | LinkDescriptor* ld = addDescriptor( link_id );
|
---|
474 | ld->overlayId = link_id;
|
---|
475 | ld->communicationId = link_id;
|
---|
476 | ld->listener = listener;
|
---|
477 | ld->service = service;
|
---|
478 | bc->establishLink( ep, link_id );
|
---|
479 |
|
---|
480 | return link_id;
|
---|
481 | }
|
---|
482 |
|
---|
483 | /// establishes a link between two arbitrary nodes
|
---|
484 | const LinkID BaseOverlay::establishLink( const NodeID& node,
|
---|
485 | const ServiceID& service, const LinkID& link_id ) {
|
---|
486 |
|
---|
487 | // do not establish a link to myself!
|
---|
488 | if (node == nodeId) return LinkID::UNSPECIFIED;
|
---|
489 |
|
---|
490 | // create a link descriptor
|
---|
491 | LinkDescriptor* ld = createLinkDescriptor( node, service, link_id );
|
---|
492 |
|
---|
493 | // create link request message with own link id
|
---|
494 | uint32_t nonce = (uint32_t)(rand() ^ (rand() << 16) ^ time(NULL));
|
---|
495 | LinkRequest link_request_msg(
|
---|
496 | nonce, &bc->getEndpointDescriptor(), false,
|
---|
497 | ld->overlayId, ld->localRelay );
|
---|
498 | OverlayMsg overlay_msg( OverlayMsg::typeLinkRequest, service, nodeId );
|
---|
499 | overlay_msg.encapsulate( &link_request_msg );
|
---|
500 | pendingLinks.insert( make_pair(nonce, ld->overlayId) );
|
---|
501 |
|
---|
502 | // debug message
|
---|
503 | logging_debug(
|
---|
504 | "Sending link request with"
|
---|
505 | << " link id=" << ld->overlayId
|
---|
506 | << " node id=" << ld->remoteNode.toString()
|
---|
507 | << " service id=" << ld->service.toString()
|
---|
508 | << " local relay id=" << ld->localRelay.toString()
|
---|
509 | << " nonce= " << nonce
|
---|
510 | );
|
---|
511 |
|
---|
512 | // sending message through new link
|
---|
513 | sendMessage( &overlay_msg, ld );
|
---|
514 |
|
---|
515 | return ld->overlayId;
|
---|
516 | }
|
---|
517 |
|
---|
518 | /// drops an established link
|
---|
519 | void BaseOverlay::dropLink(const LinkID& link) {
|
---|
520 | logging_debug( "Dropping link (initiated locally):" << link.toString() );
|
---|
521 |
|
---|
522 | // find the link item to drop
|
---|
523 | LinkDescriptor* ld = getDescriptor(link);
|
---|
524 | if( ld == NULL ) {
|
---|
525 | logging_warn( "Can't drop link, link is unknown!");
|
---|
526 | return;
|
---|
527 | }
|
---|
528 |
|
---|
529 | // delete all queued messages
|
---|
530 | if( ld->messageQueue.size() > 0 ) {
|
---|
531 | logging_warn( "Dropping link " << ld->overlayId.toString() << " that has "
|
---|
532 | << ld->messageQueue.size() << " waiting messages" );
|
---|
533 | ld->flushQueue();
|
---|
534 | }
|
---|
535 |
|
---|
536 | // inform sideport and listener
|
---|
537 | ld->listener->onLinkDown( ld->overlayId, ld->remoteNode );
|
---|
538 | sideport->onLinkDown(ld->overlayId, this->nodeId, ld->remoteNode, this->spovnetId );
|
---|
539 |
|
---|
540 | // do not drop relay links
|
---|
541 | if (!ld->usedAsRelay) {
|
---|
542 | // drop the link in base communication
|
---|
543 | if (ld->communicationUp) bc->dropLink( ld->communicationId );
|
---|
544 |
|
---|
545 | // erase descriptor
|
---|
546 | eraseDescriptor( ld->overlayId );
|
---|
547 | } else
|
---|
548 | ld->dropWhenRelaysLeft = true;
|
---|
549 | }
|
---|
550 |
|
---|
551 | // ----------------------------------------------------------------------------
|
---|
552 |
|
---|
553 | /// internal send message, always use this functions to send messages over links
|
---|
554 | seqnum_t BaseOverlay::sendMessage( const Message* message, const LinkID& link ) {
|
---|
555 | logging_debug( "Sending data message on link " << link.toString() );
|
---|
556 |
|
---|
557 | // get the mapping for this link
|
---|
558 | LinkDescriptor* ld = getDescriptor(link);
|
---|
559 | if( ld == NULL ) {
|
---|
560 | logging_error("Could not send message. "
|
---|
561 | << "Link not found id=" << link.toString());
|
---|
562 | return -1;
|
---|
563 | }
|
---|
564 |
|
---|
565 | // check if the link is up yet, if its an auto link queue message
|
---|
566 | if( !ld->up ) {
|
---|
567 | ld->markAsUsed();
|
---|
568 | if( ld->autolink ) {
|
---|
569 | logging_info("Auto-link " << link.toString() << " not up, queue message");
|
---|
570 | Data data = data_serialize( message );
|
---|
571 | const_cast<Message*>(message)->dropPayload();
|
---|
572 | ld->messageQueue.push_back( new Message(data) );
|
---|
573 | } else {
|
---|
574 | logging_error("Link " << link.toString() << " not up, drop message");
|
---|
575 | }
|
---|
576 | return -1;
|
---|
577 | }
|
---|
578 |
|
---|
579 | // compile overlay message (has service and node id)
|
---|
580 | OverlayMsg overmsg( OverlayMsg::typeData, ld->service, nodeId );
|
---|
581 | overmsg.encapsulate( const_cast<Message*>(message) );
|
---|
582 |
|
---|
583 | // send message over relay/direct/overlay
|
---|
584 | return sendMessage( &overmsg, ld );
|
---|
585 | }
|
---|
586 |
|
---|
587 | seqnum_t BaseOverlay::sendMessage(const Message* message,
|
---|
588 | const NodeID& node, const ServiceID& service) {
|
---|
589 |
|
---|
590 | // find link for node and service
|
---|
591 | LinkDescriptor* ld = getAutoDescriptor( node, service );
|
---|
592 |
|
---|
593 | // if we found no link, create an auto link
|
---|
594 | if( ld == NULL ) {
|
---|
595 |
|
---|
596 | // debug output
|
---|
597 | logging_info( "No link to send message to node "
|
---|
598 | << node.toString() << " found for service "
|
---|
599 | << service.toString() << ". Creating auto link ..."
|
---|
600 | );
|
---|
601 |
|
---|
602 | // this will call onlinkup on us, if everything worked we now have a mapping
|
---|
603 | LinkID link = LinkID::create();
|
---|
604 |
|
---|
605 | // call base overlay to create a link
|
---|
606 | link = establishLink( node, service, link );
|
---|
607 | ld = getDescriptor( link );
|
---|
608 | if( ld == NULL ) {
|
---|
609 | logging_error( "Failed to establish auto-link.");
|
---|
610 | return -1;
|
---|
611 | }
|
---|
612 | ld->autolink = true;
|
---|
613 |
|
---|
614 | logging_debug( "Auto-link establishment in progress to node "
|
---|
615 | << node.toString() << " with link id=" << link.toString() );
|
---|
616 | }
|
---|
617 | assert(ld != NULL);
|
---|
618 |
|
---|
619 | // mark the link as used, as we now send a message through it
|
---|
620 | ld->markAsUsed();
|
---|
621 |
|
---|
622 | // send / queue message
|
---|
623 | return sendMessage( message, ld->overlayId );
|
---|
624 | }
|
---|
625 |
|
---|
626 | // ----------------------------------------------------------------------------
|
---|
627 |
|
---|
628 | const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(
|
---|
629 | const LinkID& link) const {
|
---|
630 |
|
---|
631 | // return own end-point descriptor
|
---|
632 | if( link == LinkID::UNSPECIFIED )
|
---|
633 | return bc->getEndpointDescriptor();
|
---|
634 |
|
---|
635 | // find link descriptor. not found -> return unspecified
|
---|
636 | const LinkDescriptor* ld = getDescriptor(link);
|
---|
637 | if (ld==NULL) return EndpointDescriptor::UNSPECIFIED;
|
---|
638 |
|
---|
639 | // return endpoint-descriptor from base communication
|
---|
640 | return bc->getEndpointDescriptor( ld->communicationId );
|
---|
641 | }
|
---|
642 |
|
---|
643 | const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(
|
---|
644 | const NodeID& node) const {
|
---|
645 |
|
---|
646 | // return own end-point descriptor
|
---|
647 | if( node == nodeId || node == NodeID::UNSPECIFIED )
|
---|
648 | return bc->getEndpointDescriptor();
|
---|
649 |
|
---|
650 | // no joined and request remote descriptor? -> fail!
|
---|
651 | if( overlayInterface == NULL ) {
|
---|
652 | logging_error( "overlay interface not set, cannot resolve endpoint" );
|
---|
653 | return EndpointDescriptor::UNSPECIFIED;
|
---|
654 | }
|
---|
655 |
|
---|
656 | // resolve end-point descriptor from the base-overlay routing table
|
---|
657 | return overlayInterface->resolveNode( node );
|
---|
658 | }
|
---|
659 |
|
---|
660 | // ----------------------------------------------------------------------------
|
---|
661 |
|
---|
662 | bool BaseOverlay::registerSidePort(SideportListener* _sideport) {
|
---|
663 | sideport = _sideport;
|
---|
664 | _sideport->configure( this );
|
---|
665 | }
|
---|
666 |
|
---|
667 | bool BaseOverlay::unregisterSidePort(SideportListener* _sideport) {
|
---|
668 | sideport = &SideportListener::DEFAULT;
|
---|
669 | }
|
---|
670 |
|
---|
671 | // ----------------------------------------------------------------------------
|
---|
672 |
|
---|
673 | bool BaseOverlay::bind(CommunicationListener* listener, const ServiceID& sid) {
|
---|
674 | logging_debug( "binding communication listener " << listener
|
---|
675 | << " on serviceid " << sid.toString() );
|
---|
676 |
|
---|
677 | if( communicationListeners.contains( sid ) ) {
|
---|
678 | logging_error( "some listener already registered for service id "
|
---|
679 | << sid.toString() );
|
---|
680 | return false;
|
---|
681 | }
|
---|
682 |
|
---|
683 | communicationListeners.registerItem( listener, sid );
|
---|
684 | return true;
|
---|
685 | }
|
---|
686 |
|
---|
687 |
|
---|
688 | bool BaseOverlay::unbind(CommunicationListener* listener, const ServiceID& sid) {
|
---|
689 | logging_debug( "unbinding listener " << listener << " from serviceid " << sid.toString() );
|
---|
690 |
|
---|
691 | if( !communicationListeners.contains( sid ) ) {
|
---|
692 | logging_warn( "cannot unbind listener. no listener registered on service id " << sid.toString() );
|
---|
693 | return false;
|
---|
694 | }
|
---|
695 |
|
---|
696 | if( communicationListeners.get(sid) != listener ) {
|
---|
697 | logging_warn( "listener bound to service id " << sid.toString()
|
---|
698 | << " is different than listener trying to unbind" );
|
---|
699 | return false;
|
---|
700 | }
|
---|
701 |
|
---|
702 | communicationListeners.unregisterItem( sid );
|
---|
703 | return true;
|
---|
704 | }
|
---|
705 |
|
---|
706 | // ----------------------------------------------------------------------------
|
---|
707 |
|
---|
708 | bool BaseOverlay::bind(NodeListener* listener) {
|
---|
709 | logging_debug( "Binding node listener " << listener );
|
---|
710 |
|
---|
711 | // already bound? yes-> warning
|
---|
712 | NodeListenerVector::iterator i =
|
---|
713 | find( nodeListeners.begin(), nodeListeners.end(), listener );
|
---|
714 | if( i != nodeListeners.end() ) {
|
---|
715 | logging_warn("Node listener " << listener << " is already bound!" );
|
---|
716 | return false;
|
---|
717 | }
|
---|
718 |
|
---|
719 | // no-> add
|
---|
720 | nodeListeners.push_back( listener );
|
---|
721 | return true;
|
---|
722 | }
|
---|
723 |
|
---|
724 | bool BaseOverlay::unbind(NodeListener* listener) {
|
---|
725 | logging_debug( "Unbinding node listener " << listener );
|
---|
726 |
|
---|
727 | // already unbound? yes-> warning
|
---|
728 | NodeListenerVector::iterator i = find( nodeListeners.begin(), nodeListeners.end(), listener );
|
---|
729 | if( i == nodeListeners.end() ) {
|
---|
730 | logging_warn( "Node listener " << listener << " is not bound!" );
|
---|
731 | return false;
|
---|
732 | }
|
---|
733 |
|
---|
734 | // no-> remove
|
---|
735 | nodeListeners.erase( i );
|
---|
736 | return true;
|
---|
737 | }
|
---|
738 |
|
---|
739 | // ----------------------------------------------------------------------------
|
---|
740 |
|
---|
741 | void BaseOverlay::onLinkUp(const LinkID& id,
|
---|
742 | const address_v* local, const address_v* remote) {
|
---|
743 | logging_debug( "Link up with base communication link id=" << id );
|
---|
744 |
|
---|
745 | // get descriptor for link
|
---|
746 | LinkDescriptor* ld = getDescriptor(id, true);
|
---|
747 |
|
---|
748 | // handle bootstrap link we initiated
|
---|
749 | if( std::find(bootstrapLinks.begin(), bootstrapLinks.end(), id) != bootstrapLinks.end() ){
|
---|
750 | logging_info(
|
---|
751 | "Join has been initiated by me and the link is now up. " <<
|
---|
752 | "Sending out join request for SpoVNet " << spovnetId.toString()
|
---|
753 | );
|
---|
754 |
|
---|
755 | // send join request message
|
---|
756 | OverlayMsg overlayMsg( OverlayMsg::typeJoinRequest, nodeId );
|
---|
757 | JoinRequest joinRequest( spovnetId, nodeId );
|
---|
758 | overlayMsg.encapsulate( &joinRequest );
|
---|
759 | bc->sendMessage( id, &overlayMsg );
|
---|
760 | return;
|
---|
761 | }
|
---|
762 |
|
---|
763 | // no link found? -> link establishment from remote, add one!
|
---|
764 | if (ld == NULL) {
|
---|
765 | ld = addDescriptor( id );
|
---|
766 | logging_debug( "onLinkUp (remote request) descriptor: " << ld );
|
---|
767 |
|
---|
768 | // update descriptor
|
---|
769 | ld->fromRemote = true;
|
---|
770 | ld->communicationId = id;
|
---|
771 | ld->communicationUp = true;
|
---|
772 | ld->markAsUsed();
|
---|
773 |
|
---|
774 | // in this case, do not inform listener, since service it unknown
|
---|
775 | // -> wait for update message!
|
---|
776 |
|
---|
777 | // link mapping found? -> send update message with node-id and service id
|
---|
778 | } else {
|
---|
779 | logging_debug( "onLinkUp descriptor (initiated locally):" << ld );
|
---|
780 |
|
---|
781 | // note: necessary to validate the link on the remote side!
|
---|
782 | logging_debug( "Sending out update" <<
|
---|
783 | " for service " << ld->service.toString() <<
|
---|
784 | " with local node id " << nodeId.toString() <<
|
---|
785 | " on link " << ld->overlayId.toString() );
|
---|
786 |
|
---|
787 | // update descriptor
|
---|
788 | ld->markAsUsed();
|
---|
789 | ld->communicationUp = true;
|
---|
790 |
|
---|
791 | // if link is a relayed link ->convert to direct link
|
---|
792 | if (ld->relay) {
|
---|
793 | logging_force( "Converting to direct link: " << ld );
|
---|
794 | ld->up = true;
|
---|
795 | ld->relay = false;
|
---|
796 | ld->localRelay = NodeID::UNSPECIFIED;
|
---|
797 | OverlayMsg overMsg( OverlayMsg::typeDirectLink, ld->service, nodeId );
|
---|
798 | overMsg.setRelayLink( ld->remoteLinkId );
|
---|
799 | bc->sendMessage( ld->communicationId, &overMsg );
|
---|
800 | }
|
---|
801 |
|
---|
802 | // compile and send update message
|
---|
803 | OverlayMsg overlayMsg( OverlayMsg::typeUpdate, ld->service, nodeId );
|
---|
804 | overlayMsg.setAutoLink( ld->autolink );
|
---|
805 | bc->sendMessage( ld->communicationId, &overlayMsg );
|
---|
806 | }
|
---|
807 | }
|
---|
808 |
|
---|
809 | void BaseOverlay::onLinkDown(const LinkID& id,
|
---|
810 | const address_v* local, const address_v* remote) {
|
---|
811 |
|
---|
812 | // erase bootstrap links
|
---|
813 | vector<LinkID>::iterator it = std::find( bootstrapLinks.begin(), bootstrapLinks.end(), id );
|
---|
814 | if( it != bootstrapLinks.end() ) bootstrapLinks.erase( it );
|
---|
815 |
|
---|
816 | // get descriptor for link
|
---|
817 | LinkDescriptor* ld = getDescriptor(id, true);
|
---|
818 | if ( ld == NULL ) return; // not found? ->ignore!
|
---|
819 | logging_force( "onLinkDown descriptor: " << ld );
|
---|
820 |
|
---|
821 | // inform listeners about link down
|
---|
822 | ld->communicationUp = false;
|
---|
823 | ld->listener->onLinkDown( ld->overlayId, ld->remoteNode );
|
---|
824 | sideport->onLinkDown( id, this->nodeId, ld->remoteNode, this->spovnetId );
|
---|
825 |
|
---|
826 | // delete all queued messages (auto links)
|
---|
827 | if( ld->messageQueue.size() > 0 ) {
|
---|
828 | logging_warn( "Dropping link " << id.toString() << " that has "
|
---|
829 | << ld->messageQueue.size() << " waiting messages" );
|
---|
830 | ld->flushQueue();
|
---|
831 | }
|
---|
832 |
|
---|
833 | // erase mapping
|
---|
834 | eraseDescriptor(ld->overlayId);
|
---|
835 | }
|
---|
836 |
|
---|
837 | void BaseOverlay::onLinkChanged(const LinkID& id,
|
---|
838 | const address_v* oldlocal, const address_v* newlocal,
|
---|
839 | const address_v* oldremote, const address_v* newremote) {
|
---|
840 |
|
---|
841 | // get descriptor for link
|
---|
842 | LinkDescriptor* ld = getDescriptor(id, true);
|
---|
843 | if ( ld == NULL ) return; // not found? ->ignore!
|
---|
844 | logging_debug( "onLinkChanged descriptor: " << ld );
|
---|
845 |
|
---|
846 | // inform listeners
|
---|
847 | ld->listener->onLinkChanged( ld->overlayId, ld->remoteNode );
|
---|
848 | sideport->onLinkChanged( id, this->nodeId, ld->remoteNode, this->spovnetId );
|
---|
849 |
|
---|
850 | // autolinks: refresh timestamp
|
---|
851 | ld->markAsUsed();
|
---|
852 | }
|
---|
853 |
|
---|
854 | void BaseOverlay::onLinkFail(const LinkID& id,
|
---|
855 | const address_v* local, const address_v* remote) {
|
---|
856 | logging_debug( "Link fail with base communication link id=" << id );
|
---|
857 |
|
---|
858 | // erase bootstrap links
|
---|
859 | vector<LinkID>::iterator it = std::find( bootstrapLinks.begin(), bootstrapLinks.end(), id );
|
---|
860 | if( it != bootstrapLinks.end() ) bootstrapLinks.erase( it );
|
---|
861 |
|
---|
862 | // get descriptor for link
|
---|
863 | LinkDescriptor* ld = getDescriptor(id, true);
|
---|
864 | if ( ld == NULL ) return; // not found? ->ignore!
|
---|
865 | logging_debug( "Link failed id=" << ld->overlayId.toString() );
|
---|
866 |
|
---|
867 | // inform listeners
|
---|
868 | ld->listener->onLinkFail( ld->overlayId, ld->remoteNode );
|
---|
869 | sideport->onLinkFail( id, this->nodeId, ld->remoteNode, this->spovnetId );
|
---|
870 |
|
---|
871 | // autolinks: refresh timestamp
|
---|
872 | ld->markAsUsed();
|
---|
873 | }
|
---|
874 |
|
---|
875 | void BaseOverlay::onLinkQoSChanged(const LinkID& id, const address_v* local,
|
---|
876 | const address_v* remote, const QoSParameterSet& qos) {
|
---|
877 | logging_debug( "Link quality changed with base communication link id=" << id );
|
---|
878 |
|
---|
879 | // get descriptor for link
|
---|
880 | LinkDescriptor* ld = getDescriptor(id, true);
|
---|
881 | if ( ld == NULL ) return; // not found? ->ignore!
|
---|
882 | logging_debug( "Link quality changed id=" << ld->overlayId.toString() );
|
---|
883 |
|
---|
884 | // autolinks: refresh timestamp
|
---|
885 | ld->markAsUsed();
|
---|
886 | }
|
---|
887 |
|
---|
888 | bool BaseOverlay::onLinkRequest( const LinkID& id, const address_v* local,
|
---|
889 | const address_v* remote ) {
|
---|
890 | logging_debug("Accepting link request from " << remote->to_string() );
|
---|
891 | return true;
|
---|
892 | }
|
---|
893 |
|
---|
894 | /// handles a message from base communication
|
---|
895 | bool BaseOverlay::receiveMessage(const Message* message,
|
---|
896 | const LinkID& link, const NodeID& ) {
|
---|
897 | // get descriptor for link
|
---|
898 | LinkDescriptor* ld = getDescriptor( link, true );
|
---|
899 |
|
---|
900 | // link known?
|
---|
901 | if (ld == NULL) { // no-> handle with unspecified params
|
---|
902 | logging_debug("Received message from base communication, link descriptor unknown" );
|
---|
903 | return handleMessage( message, LinkID::UNSPECIFIED, link, NodeID::UNSPECIFIED );
|
---|
904 | } else { // yes -> handle with overlay link id
|
---|
905 | logging_debug("Received message from base communication, link id=" << ld->overlayId.toString() );
|
---|
906 | return handleMessage( message, ld->overlayId, link, NodeID::UNSPECIFIED );
|
---|
907 | }
|
---|
908 | }
|
---|
909 |
|
---|
910 | // ----------------------------------------------------------------------------
|
---|
911 |
|
---|
912 | /// handles a message from an overlay
|
---|
913 | void BaseOverlay::incomingRouteMessage( Message* msg, const LinkID& link, const NodeID& source ) {
|
---|
914 | logging_debug("Received message from overlay -- "
|
---|
915 | << " link id=" << link.toString()
|
---|
916 | << " node id=" << source.toString() );
|
---|
917 | handleMessage( msg, link, LinkID::UNSPECIFIED, source );
|
---|
918 | }
|
---|
919 |
|
---|
920 | // ----------------------------------------------------------------------------
|
---|
921 |
|
---|
922 | /// handles an incoming message
|
---|
923 | bool BaseOverlay::handleMessage( const Message* message,
|
---|
924 | const LinkID& boLink, const LinkID& bcLink, const NodeID& remoteNode ) {
|
---|
925 | logging_debug( "Handling message: " << message->toString());
|
---|
926 |
|
---|
927 | // decapsulate overlay message
|
---|
928 | OverlayMsg* overlayMsg =
|
---|
929 | const_cast<Message*>(message)->decapsulate<OverlayMsg>();
|
---|
930 | if( overlayMsg == NULL ) return false;
|
---|
931 |
|
---|
932 | // mark the link as in action
|
---|
933 | LinkDescriptor* ld = getDescriptor(boLink);
|
---|
934 | if (ld == NULL) ld = getDescriptor(bcLink, true);
|
---|
935 | if (ld != NULL) {
|
---|
936 | ld->markAsUsed();
|
---|
937 | ld->markAlive();
|
---|
938 | }
|
---|
939 |
|
---|
940 | switch ( overlayMsg->getType() ) {
|
---|
941 | // ---------------------------------------------------------------------
|
---|
942 | // Handle spovnet instance join requests
|
---|
943 | // ---------------------------------------------------------------------
|
---|
944 | case OverlayMsg::typeJoinRequest: {
|
---|
945 |
|
---|
946 | // decapsulate message
|
---|
947 | JoinRequest* joinReq = overlayMsg->decapsulate<JoinRequest>();
|
---|
948 | logging_info( "Received join request for spovnet " <<
|
---|
949 | joinReq->getSpoVNetID().toString() );
|
---|
950 |
|
---|
951 | // check spovnet id
|
---|
952 | if( joinReq->getSpoVNetID() != spovnetId ) {
|
---|
953 | logging_error(
|
---|
954 | "Received join request for spovnet we don't handle " <<
|
---|
955 | joinReq->getSpoVNetID().toString() );
|
---|
956 | return false;
|
---|
957 | }
|
---|
958 |
|
---|
959 | // TODO: here you can implement mechanisms to deny joining of a node
|
---|
960 | bool allow = true;
|
---|
961 | logging_info( "Sending join reply for spovnet " <<
|
---|
962 | spovnetId.toString() << " to node " <<
|
---|
963 | overlayMsg->getSourceNode().toString() <<
|
---|
964 | ". Result: " << (allow ? "allowed" : "denied") );
|
---|
965 | joiningNodes.push_back( overlayMsg->getSourceNode() );
|
---|
966 |
|
---|
967 | // return overlay parameters
|
---|
968 | assert( overlayInterface != NULL );
|
---|
969 | logging_debug( "Using bootstrap end-point "
|
---|
970 | << getEndpointDescriptor().toString() )
|
---|
971 | OverlayParameterSet parameters = overlayInterface->getParameters();
|
---|
972 | OverlayMsg retmsg( OverlayMsg::typeJoinReply, nodeId );
|
---|
973 | JoinReply replyMsg( spovnetId, parameters,
|
---|
974 | allow, getEndpointDescriptor() );
|
---|
975 | retmsg.encapsulate(&replyMsg);
|
---|
976 | bc->sendMessage( bcLink, &retmsg );
|
---|
977 | return true;
|
---|
978 | }
|
---|
979 |
|
---|
980 | // ---------------------------------------------------------------------
|
---|
981 | // handle replies to spovnet instance join requests
|
---|
982 | // ---------------------------------------------------------------------
|
---|
983 | case OverlayMsg::typeJoinReply: {
|
---|
984 |
|
---|
985 | // decapsulate message
|
---|
986 | logging_debug("received join reply message");
|
---|
987 | JoinReply* replyMsg = overlayMsg->decapsulate<JoinReply>();
|
---|
988 |
|
---|
989 | // correct spovnet?
|
---|
990 | if( replyMsg->getSpoVNetID() != spovnetId ) { // no-> fail
|
---|
991 | logging_error( "Received SpoVNet join reply for " <<
|
---|
992 | replyMsg->getSpoVNetID().toString() <<
|
---|
993 | " != " << spovnetId.toString() );
|
---|
994 | return false;
|
---|
995 | }
|
---|
996 |
|
---|
997 | // access granted? no -> fail
|
---|
998 | if( !replyMsg->getJoinAllowed() ) {
|
---|
999 | logging_error( "Our join request has been denied" );
|
---|
1000 |
|
---|
1001 | // drop initiator link
|
---|
1002 |
|
---|
1003 | if(bcLink != LinkID::UNSPECIFIED){
|
---|
1004 | bc->dropLink( bcLink );
|
---|
1005 |
|
---|
1006 | vector<LinkID>::iterator it = std::find(
|
---|
1007 | bootstrapLinks.begin(), bootstrapLinks.end(), bcLink);
|
---|
1008 | if( it != bootstrapLinks.end() )
|
---|
1009 | bootstrapLinks.erase(it);
|
---|
1010 | }
|
---|
1011 |
|
---|
1012 | // inform all registered services of the event
|
---|
1013 | BOOST_FOREACH( NodeListener* i, nodeListeners )
|
---|
1014 | i->onJoinFailed( spovnetId );
|
---|
1015 |
|
---|
1016 | return true;
|
---|
1017 | }
|
---|
1018 |
|
---|
1019 | // access has been granted -> continue!
|
---|
1020 | logging_info("Join request has been accepted for spovnet " <<
|
---|
1021 | spovnetId.toString() );
|
---|
1022 |
|
---|
1023 | logging_debug( "Using bootstrap end-point "
|
---|
1024 | << replyMsg->getBootstrapEndpoint().toString() );
|
---|
1025 |
|
---|
1026 | //
|
---|
1027 | // create overlay structure from spovnet parameter set
|
---|
1028 | // if we have not boostrapped yet against some other node
|
---|
1029 | //
|
---|
1030 |
|
---|
1031 | if( overlayInterface == NULL ){
|
---|
1032 |
|
---|
1033 | logging_debug("first-time bootstrapping");
|
---|
1034 |
|
---|
1035 | overlayInterface = OverlayFactory::create(
|
---|
1036 | *this, replyMsg->getParam(), nodeId, this );
|
---|
1037 |
|
---|
1038 | // overlay structure supported? no-> fail!
|
---|
1039 | if( overlayInterface == NULL ) {
|
---|
1040 | logging_error( "overlay structure not supported" );
|
---|
1041 |
|
---|
1042 | if(bcLink != LinkID::UNSPECIFIED){
|
---|
1043 | bc->dropLink( bcLink );
|
---|
1044 |
|
---|
1045 | vector<LinkID>::iterator it = std::find(
|
---|
1046 | bootstrapLinks.begin(), bootstrapLinks.end(), bcLink);
|
---|
1047 | if( it != bootstrapLinks.end() )
|
---|
1048 | bootstrapLinks.erase(it);
|
---|
1049 | }
|
---|
1050 |
|
---|
1051 | // inform all registered services of the event
|
---|
1052 | BOOST_FOREACH( NodeListener* i, nodeListeners )
|
---|
1053 | i->onJoinFailed( spovnetId );
|
---|
1054 |
|
---|
1055 | return true;
|
---|
1056 | }
|
---|
1057 |
|
---|
1058 | // everything ok-> join the overlay!
|
---|
1059 | state = BaseOverlayStateCompleted;
|
---|
1060 | overlayInterface->createOverlay();
|
---|
1061 |
|
---|
1062 | overlayInterface->joinOverlay( replyMsg->getBootstrapEndpoint() );
|
---|
1063 |
|
---|
1064 | // update ovlvis
|
---|
1065 | //ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN);
|
---|
1066 |
|
---|
1067 | // inform all registered services of the event
|
---|
1068 | BOOST_FOREACH( NodeListener* i, nodeListeners )
|
---|
1069 | i->onJoinCompleted( spovnetId );
|
---|
1070 |
|
---|
1071 | } else {
|
---|
1072 |
|
---|
1073 | // this is not the first bootstrap, just join the additional node
|
---|
1074 | logging_debug("not first-time bootstrapping");
|
---|
1075 | overlayInterface->joinOverlay( replyMsg->getBootstrapEndpoint() );
|
---|
1076 |
|
---|
1077 | } // if( overlayInterface == NULL )
|
---|
1078 |
|
---|
1079 | return true;
|
---|
1080 | }
|
---|
1081 |
|
---|
1082 | // ---------------------------------------------------------------------
|
---|
1083 | // handle data forward messages
|
---|
1084 | // ---------------------------------------------------------------------
|
---|
1085 | case OverlayMsg::typeData: {
|
---|
1086 |
|
---|
1087 | // get service
|
---|
1088 | const ServiceID& service = overlayMsg->getService();
|
---|
1089 | logging_debug( "received data for service " << service.toString() );
|
---|
1090 |
|
---|
1091 | // find listener
|
---|
1092 | CommunicationListener* listener =
|
---|
1093 | communicationListeners.get( service );
|
---|
1094 | if( listener == NULL ) return true;
|
---|
1095 |
|
---|
1096 | // delegate data message
|
---|
1097 | listener->onMessage( overlayMsg,
|
---|
1098 | overlayMsg->getSourceNode(), ld->overlayId );
|
---|
1099 |
|
---|
1100 | return true;
|
---|
1101 | }
|
---|
1102 |
|
---|
1103 | // ---------------------------------------------------------------------
|
---|
1104 | // handle update messages for link establishment
|
---|
1105 | // ---------------------------------------------------------------------
|
---|
1106 | case OverlayMsg::typeUpdate: {
|
---|
1107 | logging_debug("Received type update message on link " << ld );
|
---|
1108 |
|
---|
1109 | // get info
|
---|
1110 | const NodeID& sourcenode = overlayMsg->getSourceNode();
|
---|
1111 | const ServiceID& service = overlayMsg->getService();
|
---|
1112 |
|
---|
1113 | // no link descriptor available -> error!
|
---|
1114 | if( ld == NULL ) {
|
---|
1115 | logging_warn( "received overlay update message for link " <<
|
---|
1116 | ld->overlayId.toString() << " for which we have no mapping" );
|
---|
1117 | return false;
|
---|
1118 | }
|
---|
1119 |
|
---|
1120 | // update our link mapping information for this link
|
---|
1121 | bool changed =
|
---|
1122 | ( ld->remoteNode != sourcenode ) || ( ld->service != service );
|
---|
1123 | ld->remoteNode = sourcenode;
|
---|
1124 | ld->service = service;
|
---|
1125 | ld->autolink = overlayMsg->isAutoLink();
|
---|
1126 |
|
---|
1127 | // if our link information changed, we send out an update, too
|
---|
1128 | if( changed ) {
|
---|
1129 | OverlayMsg overMsg( OverlayMsg::typeUpdate, ld->service, nodeId );
|
---|
1130 | overMsg.setAutoLink(ld->autolink);
|
---|
1131 | bc->sendMessage( ld->communicationId, &overMsg );
|
---|
1132 | }
|
---|
1133 |
|
---|
1134 | // service registered? no-> error!
|
---|
1135 | if( !communicationListeners.contains( service ) ) {
|
---|
1136 | logging_warn( "Link up: event listener has not been registered" );
|
---|
1137 | return false;
|
---|
1138 | }
|
---|
1139 |
|
---|
1140 | // default or no service registered?
|
---|
1141 | CommunicationListener* listener = communicationListeners.get( service );
|
---|
1142 | if( listener == NULL || listener == &CommunicationListener::DEFAULT ) {
|
---|
1143 | logging_warn("Link up: event listener is default or null!" );
|
---|
1144 | return true;
|
---|
1145 | }
|
---|
1146 |
|
---|
1147 | // update descriptor
|
---|
1148 | ld->listener = listener;
|
---|
1149 | ld->markAsUsed();
|
---|
1150 | ld->markAlive();
|
---|
1151 |
|
---|
1152 | // ask the service whether it wants to accept this link
|
---|
1153 | if( !listener->onLinkRequest(sourcenode) ) {
|
---|
1154 |
|
---|
1155 | logging_debug("Link id=" << ld->overlayId.toString() <<
|
---|
1156 | " has been denied by service " << service.toString() << ", dropping link");
|
---|
1157 |
|
---|
1158 | // prevent onLinkDown calls to the service
|
---|
1159 | ld->listener = &CommunicationListener::DEFAULT;
|
---|
1160 |
|
---|
1161 | // drop the link
|
---|
1162 | dropLink( ld->overlayId );
|
---|
1163 | return true;
|
---|
1164 | }
|
---|
1165 |
|
---|
1166 | // set link up
|
---|
1167 | ld->up = true;
|
---|
1168 | logging_debug(
|
---|
1169 | "Link " << ld->overlayId.toString()
|
---|
1170 | << " has been accepted by service " << service.toString()
|
---|
1171 | << " and is now up"
|
---|
1172 | );
|
---|
1173 |
|
---|
1174 | // auto links: link has been accepted -> send queued messages
|
---|
1175 | if( ld->messageQueue.size() > 0 ) {
|
---|
1176 | logging_info( "sending out queued messages on link " <<
|
---|
1177 | ld->overlayId.toString() );
|
---|
1178 | BOOST_FOREACH( Message* msg, ld->messageQueue ) {
|
---|
1179 | sendMessage( msg, ld->overlayId );
|
---|
1180 | delete msg;
|
---|
1181 | }
|
---|
1182 | ld->messageQueue.clear();
|
---|
1183 | }
|
---|
1184 |
|
---|
1185 | // call the notification functions
|
---|
1186 | listener->onLinkUp( ld->overlayId, sourcenode );
|
---|
1187 | sideport->onLinkUp( ld->overlayId, nodeId, sourcenode, this->spovnetId );
|
---|
1188 |
|
---|
1189 | return true;
|
---|
1190 | }
|
---|
1191 |
|
---|
1192 | // ---------------------------------------------------------------------
|
---|
1193 | // handle link request forwarded through the overlay
|
---|
1194 | // ---------------------------------------------------------------------
|
---|
1195 | case OverlayMsg::typeLinkRequest: {
|
---|
1196 |
|
---|
1197 | logging_debug( "received link request on link" );
|
---|
1198 |
|
---|
1199 | // decapsulate message
|
---|
1200 | LinkRequest* linkReq = overlayMsg->decapsulate<LinkRequest>();
|
---|
1201 | const ServiceID& service = overlayMsg->getService();
|
---|
1202 |
|
---|
1203 | // is request reply?
|
---|
1204 | if ( linkReq->isReply() ) {
|
---|
1205 |
|
---|
1206 | // find link
|
---|
1207 | PendingLinkMap::iterator i = pendingLinks.find( linkReq->getNonce() );
|
---|
1208 | if ( i == pendingLinks.end() ) {
|
---|
1209 | logging_error( "Nonce not found in link request" );
|
---|
1210 | return true;
|
---|
1211 | }
|
---|
1212 |
|
---|
1213 | // debug message
|
---|
1214 | logging_debug( "Link request reply received. Establishing link "
|
---|
1215 | << i->second << " to " << (linkReq->getEndpoint()->toString())
|
---|
1216 | << " for service " << service.toString()
|
---|
1217 | << " with nonce " << linkReq->getNonce()
|
---|
1218 | << " using relay " << linkReq->getRelay().toString()
|
---|
1219 | << " and remote link id=" << linkReq->getRemoteLinkId()
|
---|
1220 | );
|
---|
1221 |
|
---|
1222 | // get descriptor
|
---|
1223 | LinkDescriptor* ldn = getDescriptor(i->second);
|
---|
1224 |
|
---|
1225 | // check if link request reply has a relay node ...
|
---|
1226 | if (!linkReq->getRelay().isUnspecified()) { // yes->
|
---|
1227 | ldn->up = true;
|
---|
1228 | ldn->relay = true;
|
---|
1229 | if (ldn->localRelay.isUnspecified()) {
|
---|
1230 | logging_error("On LinkRequest reply: local relay is unspecifed on link " << ldn );
|
---|
1231 | showLinkState();
|
---|
1232 | }
|
---|
1233 | ldn->remoteRelay = linkReq->getRelay();
|
---|
1234 | ldn->remoteLinkId = linkReq->getRemoteLinkId();
|
---|
1235 | ldn->remoteNode = overlayMsg->getSourceNode();
|
---|
1236 |
|
---|
1237 | ldn->markAlive();
|
---|
1238 |
|
---|
1239 | // compile and send update message
|
---|
1240 | OverlayMsg _overlayMsg( OverlayMsg::typeUpdate, ldn->service, nodeId );
|
---|
1241 | _overlayMsg.setAutoLink(ldn->autolink);
|
---|
1242 | sendMessage( &_overlayMsg, ldn );
|
---|
1243 |
|
---|
1244 | // auto links: link has been accepted -> send queued messages
|
---|
1245 | if( ldn->messageQueue.size() > 0 ) {
|
---|
1246 | logging_info( "Sending out queued messages on link " <<
|
---|
1247 | ldn->overlayId.toString() );
|
---|
1248 | BOOST_FOREACH( Message* msg, ldn->messageQueue ) {
|
---|
1249 | sendMessage( msg, ldn->overlayId );
|
---|
1250 | delete msg;
|
---|
1251 | }
|
---|
1252 | ldn->messageQueue.clear();
|
---|
1253 | }
|
---|
1254 |
|
---|
1255 | ldn->listener->onLinkUp( ldn->overlayId, ldn->remoteNode );
|
---|
1256 |
|
---|
1257 | // try to establish a direct link
|
---|
1258 | ldn->communicationId =
|
---|
1259 | bc->establishLink( *linkReq->getEndpoint(), i->second );
|
---|
1260 | }
|
---|
1261 |
|
---|
1262 | // no relay node-> use overlay routing
|
---|
1263 | else {
|
---|
1264 | ldn->up = true;
|
---|
1265 |
|
---|
1266 | // establish direct link
|
---|
1267 | ldn->communicationId =
|
---|
1268 | bc->establishLink( *linkReq->getEndpoint(), i->second );
|
---|
1269 | }
|
---|
1270 | } else {
|
---|
1271 | logging_debug( "Link request received from node id="
|
---|
1272 | << overlayMsg->getSourceNode() );
|
---|
1273 |
|
---|
1274 | // create link descriptor
|
---|
1275 | LinkDescriptor* ldn =
|
---|
1276 | createLinkDescriptor(overlayMsg->getSourceNode(),
|
---|
1277 | overlayMsg->getService(), LinkID::UNSPECIFIED );
|
---|
1278 | assert(!ldn->overlayId.isUnspecified());
|
---|
1279 |
|
---|
1280 | // create reply message
|
---|
1281 | OverlayMsg overlay_msg( OverlayMsg::typeLinkRequest, service, nodeId );
|
---|
1282 | LinkRequest link_request_msg(
|
---|
1283 | linkReq->getNonce(),
|
---|
1284 | &bc->getEndpointDescriptor(),
|
---|
1285 | true, ldn->overlayId, ldn->localRelay
|
---|
1286 | );
|
---|
1287 | overlay_msg.encapsulate( &link_request_msg );
|
---|
1288 |
|
---|
1289 | // debug message
|
---|
1290 | logging_debug( "Sending LinkRequest reply for link with nonce " <<
|
---|
1291 | linkReq->getNonce() );
|
---|
1292 |
|
---|
1293 | // if this is a relay link-> update information & inform listeners
|
---|
1294 | if (!linkReq->getRelay().isUnspecified()) {
|
---|
1295 | // set flags
|
---|
1296 | ldn->up = true;
|
---|
1297 | ldn->relay = true;
|
---|
1298 | if (ldn->localRelay.isUnspecified()) {
|
---|
1299 | logging_error("On LinkRequest request: local relay is unspecifed on link " << ldn );
|
---|
1300 | showLinkState();
|
---|
1301 | }
|
---|
1302 | ldn->remoteRelay = linkReq->getRelay();
|
---|
1303 | ldn->remoteNode = overlayMsg->getSourceNode();
|
---|
1304 | ldn->remoteLinkId = linkReq->getRemoteLinkId();
|
---|
1305 | ldn->listener->onLinkUp( ldn->overlayId, ldn->remoteNode );
|
---|
1306 | }
|
---|
1307 |
|
---|
1308 | // route message back over overlay
|
---|
1309 | sendMessage( &overlay_msg, ldn );
|
---|
1310 | }
|
---|
1311 | return true;
|
---|
1312 | }
|
---|
1313 |
|
---|
1314 | // ---------------------------------------------------------------------
|
---|
1315 | // handle relay message to forward messages
|
---|
1316 | // ---------------------------------------------------------------------
|
---|
1317 | case OverlayMsg::typeRelay: {
|
---|
1318 |
|
---|
1319 | logging_debug( "received relay request on link" );
|
---|
1320 |
|
---|
1321 | // decapsulate message
|
---|
1322 | RelayMessage* relayMsg = overlayMsg->decapsulate<RelayMessage>();
|
---|
1323 |
|
---|
1324 | // is relay message informative?
|
---|
1325 | switch (relayMsg->getType()) {
|
---|
1326 |
|
---|
1327 | // handle relay notification
|
---|
1328 | case RelayMessage::typeInform: {
|
---|
1329 | logging_info("Received relay information message with"
|
---|
1330 | << " relay " << relayMsg->getRelayNode()
|
---|
1331 | << " destination " << relayMsg->getDestNode() );
|
---|
1332 |
|
---|
1333 | // mark incoming link as relay
|
---|
1334 | if (ld!=NULL) ld->markAsRelay();
|
---|
1335 |
|
---|
1336 | // am I the destination of this message? yes->
|
---|
1337 | if (relayMsg->getDestNode() == nodeId ) {
|
---|
1338 | // deliver relay message locally!
|
---|
1339 | logging_debug("Relay message reached destination. Handling the message.");
|
---|
1340 | handleMessage( relayMsg, relayMsg->getDestLink(), LinkID::UNSPECIFIED, remoteNode );
|
---|
1341 | return true;
|
---|
1342 | }
|
---|
1343 |
|
---|
1344 | // create route message
|
---|
1345 | OverlayMsg _overMsg( *overlayMsg );
|
---|
1346 | RelayMessage _relayMsg( *relayMsg );
|
---|
1347 | _relayMsg.setType( RelayMessage::typeRoute );
|
---|
1348 | _overMsg.encapsulate( &_relayMsg );
|
---|
1349 |
|
---|
1350 | // forward message
|
---|
1351 | if (relayMsg->getRelayNode() == nodeId || relayMsg->getRelayNode().isUnspecified()) {
|
---|
1352 | logging_info("Routing relay message to " << relayMsg->getDestNode().toString() );
|
---|
1353 | sendOverlay( &_overMsg, relayMsg->getDestNode() );
|
---|
1354 | } else {
|
---|
1355 | logging_info("Routing relay message to " << relayMsg->getRelayNode().toString() );
|
---|
1356 | sendOverlay( &_overMsg, relayMsg->getRelayNode() );
|
---|
1357 | }
|
---|
1358 | return true;
|
---|
1359 | }
|
---|
1360 |
|
---|
1361 | // handle relay routing
|
---|
1362 | case RelayMessage::typeRoute: {
|
---|
1363 | logging_info("Received relay route message with"
|
---|
1364 | << " relay " << relayMsg->getRelayNode()
|
---|
1365 | << " destination " << relayMsg->getDestNode() );
|
---|
1366 |
|
---|
1367 | // mark incoming link as relay
|
---|
1368 | if (ld!=NULL) ld->markAsRelay();
|
---|
1369 |
|
---|
1370 | // am I the destination of this message? yes->
|
---|
1371 | if (relayMsg->getDestNode() == nodeId ) {
|
---|
1372 | // deliver relay message locally!
|
---|
1373 | logging_debug("Relay message reached destination. Handling the message.");
|
---|
1374 | handleMessage( relayMsg, relayMsg->getDestLink(), LinkID::UNSPECIFIED, remoteNode );
|
---|
1375 | return true;
|
---|
1376 | }
|
---|
1377 |
|
---|
1378 | // am I the relay for this message? yes->
|
---|
1379 | if (relayMsg->getRelayNode() == nodeId ) {
|
---|
1380 | logging_debug("I'm the relay for this message. Sending to destination.");
|
---|
1381 | OverlayMsg _overMsg( *overlayMsg );
|
---|
1382 | RelayMessage _relayMsg( *relayMsg );
|
---|
1383 | _overMsg.encapsulate(&_relayMsg);
|
---|
1384 |
|
---|
1385 | /// this must be handled by using relay link!
|
---|
1386 | sendOverlay(&_overMsg, relayMsg->getDestNode());
|
---|
1387 | return true;
|
---|
1388 | }
|
---|
1389 |
|
---|
1390 | // error: I'm not a relay or destination!
|
---|
1391 | logging_error("This node is neither relay nor destination. Dropping Message!");
|
---|
1392 | return true;
|
---|
1393 | }
|
---|
1394 | default: {
|
---|
1395 | logging_error("RelayMessage Unknown!");
|
---|
1396 | return true;
|
---|
1397 | }
|
---|
1398 | }
|
---|
1399 |
|
---|
1400 | break;
|
---|
1401 | }
|
---|
1402 |
|
---|
1403 | // ---------------------------------------------------------------------
|
---|
1404 | // handle keep-alive messages
|
---|
1405 | // ---------------------------------------------------------------------
|
---|
1406 | case OverlayMsg::typeKeepAlive: {
|
---|
1407 | logging_debug( "received keep-alive on link" );
|
---|
1408 | if ( ld != NULL ) {
|
---|
1409 | logging_force("Keep-Alive for "<< ld->overlayId);
|
---|
1410 | ld->markAlive();
|
---|
1411 | }
|
---|
1412 | break;
|
---|
1413 | }
|
---|
1414 |
|
---|
1415 | // ---------------------------------------------------------------------
|
---|
1416 | // handle direct link replacement messages
|
---|
1417 | // ---------------------------------------------------------------------
|
---|
1418 | case OverlayMsg::typeDirectLink: {
|
---|
1419 |
|
---|
1420 | logging_debug( "received direct link replacement request" );
|
---|
1421 |
|
---|
1422 | LinkDescriptor* rld = getDescriptor( overlayMsg->getRelayLink() );
|
---|
1423 | logging_force( "Received direct link convert notification for " << rld );
|
---|
1424 |
|
---|
1425 | // set communcation link id and set it up
|
---|
1426 | rld->communicationId = ld->communicationId;
|
---|
1427 |
|
---|
1428 | // this is neccessary since this link was a relay link before!
|
---|
1429 | rld->communicationUp = true;
|
---|
1430 |
|
---|
1431 | // this is not a relay link anymore!
|
---|
1432 | rld->relay = false;
|
---|
1433 | rld->localRelay = NodeID::UNSPECIFIED;
|
---|
1434 | rld->remoteRelay = NodeID::UNSPECIFIED;
|
---|
1435 |
|
---|
1436 | // mark used and alive!
|
---|
1437 | rld->markAsUsed();
|
---|
1438 | rld->markAlive();
|
---|
1439 |
|
---|
1440 | // erase the original descriptor
|
---|
1441 | eraseDescriptor(ld->overlayId);
|
---|
1442 | break;
|
---|
1443 | }
|
---|
1444 |
|
---|
1445 | // ---------------------------------------------------------------------
|
---|
1446 | // handle unknown message type
|
---|
1447 | // ---------------------------------------------------------------------
|
---|
1448 | default: {
|
---|
1449 | logging_error( "received message in invalid state! don't know " <<
|
---|
1450 | "what to do with this message of type " <<
|
---|
1451 | overlayMsg->getType() );
|
---|
1452 | return false;
|
---|
1453 | }
|
---|
1454 |
|
---|
1455 | } /* switch */
|
---|
1456 |
|
---|
1457 | return false;
|
---|
1458 | }
|
---|
1459 |
|
---|
1460 | // ----------------------------------------------------------------------------
|
---|
1461 |
|
---|
1462 | void BaseOverlay::broadcastMessage(Message* message, const ServiceID& service) {
|
---|
1463 |
|
---|
1464 | logging_debug( "broadcasting message to all known nodes " <<
|
---|
1465 | "in the overlay from service " + service.toString() );
|
---|
1466 |
|
---|
1467 | OverlayInterface::NodeList nodes = overlayInterface->getKnownNodes(true);
|
---|
1468 | OverlayInterface::NodeList::iterator i = nodes.begin();
|
---|
1469 | for(; i != nodes.end(); i++ ) {
|
---|
1470 | if( *i == nodeId) continue; // don't send to ourselfs
|
---|
1471 | sendMessage( message, *i, service );
|
---|
1472 | }
|
---|
1473 | }
|
---|
1474 |
|
---|
1475 | vector<NodeID> BaseOverlay::getOverlayNeighbors(bool deep) const {
|
---|
1476 | // the known nodes _can_ also include our node, so we remove ourself
|
---|
1477 | vector<NodeID> nodes = overlayInterface->getKnownNodes(deep);
|
---|
1478 |
|
---|
1479 | vector<NodeID>::iterator i = find( nodes.begin(), nodes.end(), this->nodeId );
|
---|
1480 | if( i != nodes.end() ) nodes.erase( i );
|
---|
1481 |
|
---|
1482 | return nodes;
|
---|
1483 | }
|
---|
1484 |
|
---|
1485 | const NodeID& BaseOverlay::getNodeID(const LinkID& lid) const {
|
---|
1486 | if( lid == LinkID::UNSPECIFIED ) return nodeId;
|
---|
1487 | const LinkDescriptor* ld = getDescriptor(lid);
|
---|
1488 | if( ld == NULL ) return NodeID::UNSPECIFIED;
|
---|
1489 | else return ld->remoteNode;
|
---|
1490 | }
|
---|
1491 |
|
---|
1492 | vector<LinkID> BaseOverlay::getLinkIDs( const NodeID& nid ) const {
|
---|
1493 | vector<LinkID> linkvector;
|
---|
1494 | BOOST_FOREACH( LinkDescriptor* ld, links ) {
|
---|
1495 | if( ld->remoteNode == nid || nid == NodeID::UNSPECIFIED ) {
|
---|
1496 | linkvector.push_back( ld->overlayId );
|
---|
1497 | }
|
---|
1498 | }
|
---|
1499 | return linkvector;
|
---|
1500 | }
|
---|
1501 |
|
---|
1502 |
|
---|
1503 | void BaseOverlay::onNodeJoin(const NodeID& node) {
|
---|
1504 | JoiningNodes::iterator i = std::find( joiningNodes.begin(), joiningNodes.end(), node );
|
---|
1505 | if( i == joiningNodes.end() ) return;
|
---|
1506 |
|
---|
1507 | logging_info( "node has successfully joined baseoverlay and overlay structure "
|
---|
1508 | << node.toString() );
|
---|
1509 |
|
---|
1510 | joiningNodes.erase( i );
|
---|
1511 | }
|
---|
1512 |
|
---|
1513 | void BaseOverlay::eventFunction() {
|
---|
1514 |
|
---|
1515 | // send keep-alive messages over established links
|
---|
1516 | BOOST_FOREACH( LinkDescriptor* ld, links ) {
|
---|
1517 | if (!ld->up) continue;
|
---|
1518 | OverlayMsg overMsg( OverlayMsg::typeKeepAlive,
|
---|
1519 | OverlayInterface::OVERLAY_SERVICE_ID, nodeId );
|
---|
1520 | sendMessage( &overMsg, ld );
|
---|
1521 | }
|
---|
1522 |
|
---|
1523 | // iterate over all links and check for time boundaries
|
---|
1524 | vector<LinkDescriptor*> oldlinks;
|
---|
1525 | time_t now = time(NULL);
|
---|
1526 | BOOST_FOREACH( LinkDescriptor* ld, links ) {
|
---|
1527 | // remote used as relay flag
|
---|
1528 | if ( ld->usedAsRelay && difftime( now, ld->timeUsedAsRelay ) > 10)
|
---|
1529 | ld->usedAsRelay = false;
|
---|
1530 |
|
---|
1531 | // keep alives and not up? yes-> link connection request is stale!
|
---|
1532 | if ( !ld->up && difftime( now, ld->keepAliveTime ) >= 2 ) {
|
---|
1533 |
|
---|
1534 | // increase counter
|
---|
1535 | ld->keepAliveMissed++;
|
---|
1536 |
|
---|
1537 | // missed more than four keep-alive messages (10 sec)? -> drop link
|
---|
1538 | if (ld->keepAliveMissed > 4) {
|
---|
1539 | logging_force( "Link connection request is stale, closing: " << ld );
|
---|
1540 | oldlinks.push_back( ld );
|
---|
1541 | continue;
|
---|
1542 | }
|
---|
1543 | }
|
---|
1544 |
|
---|
1545 | if (!ld->up) continue;
|
---|
1546 |
|
---|
1547 | // drop links that are dropped and not used as relay
|
---|
1548 | if (ld->dropWhenRelaysLeft && !ld->usedAsRelay && !ld->autolink) {
|
---|
1549 | oldlinks.push_back( ld );
|
---|
1550 | continue;
|
---|
1551 | }
|
---|
1552 |
|
---|
1553 | // auto-link time exceeded?
|
---|
1554 | if ( ld->autolink && difftime( now, ld->lastuse ) > 30 ) {
|
---|
1555 | oldlinks.push_back( ld );
|
---|
1556 | continue;
|
---|
1557 | }
|
---|
1558 |
|
---|
1559 | // keep alives missed? yes->
|
---|
1560 | if ( difftime( now, ld->keepAliveTime ) > 2 ) {
|
---|
1561 |
|
---|
1562 | // increase counter
|
---|
1563 | ld->keepAliveMissed++;
|
---|
1564 |
|
---|
1565 | // missed more than four keep-alive messages (4 sec)? -> drop link
|
---|
1566 | if (ld->keepAliveMissed >= 8) {
|
---|
1567 | logging_force( "Link is stale, closing: " << ld );
|
---|
1568 | oldlinks.push_back( ld );
|
---|
1569 | continue;
|
---|
1570 | }
|
---|
1571 | }
|
---|
1572 | }
|
---|
1573 |
|
---|
1574 | // drop links
|
---|
1575 | BOOST_FOREACH( const LinkDescriptor* ld, oldlinks ) {
|
---|
1576 |
|
---|
1577 | if (ld->up!=1) continue;
|
---|
1578 | /*
|
---|
1579 | vector<LinkID>::iterator it = std::find(
|
---|
1580 | bootstrapLinks.begin(), bootstrapLinks.end(), ld->communicationId);
|
---|
1581 |
|
---|
1582 | if (!ld->communicationId.isUnspecified() && it != bootstrapLinks.end() ){
|
---|
1583 | logging_force( "Not dropping initiator link: " << ld );
|
---|
1584 | continue;
|
---|
1585 | }
|
---|
1586 | */
|
---|
1587 | logging_force( "Link timed out. Dropping " << ld );
|
---|
1588 | dropLink( ld->overlayId );
|
---|
1589 | }
|
---|
1590 |
|
---|
1591 | // show link state
|
---|
1592 | counter++;
|
---|
1593 | if (counter>=4) showLinkState();
|
---|
1594 | if (counter>=4 || counter<0) counter = 0;
|
---|
1595 | }
|
---|
1596 |
|
---|
1597 | void BaseOverlay::showLinkState() {
|
---|
1598 | int i=0;
|
---|
1599 | logging_force("--- link state -------------------------------");
|
---|
1600 | BOOST_FOREACH( LinkDescriptor* ld, links ) {
|
---|
1601 | logging_force("link " << i << ": " << ld);
|
---|
1602 | i++;
|
---|
1603 | }
|
---|
1604 | logging_force("----------------------------------------------");
|
---|
1605 | }
|
---|
1606 |
|
---|
1607 | }} // namespace ariba, overlay
|
---|