| 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 "ariba/overlay/BaseOverlay.h"
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| 40 | #include "ariba/overlay/messages/OverlayMsg.h"
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| 41 |
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| 42 | #include "Chord.h"
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| 43 | #include "detail/chord_routing_table.hpp"
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| 44 |
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| 45 | #include "messages/Discovery.h"
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| 46 |
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| 47 | namespace ariba {
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| 48 | namespace overlay {
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| 49 |
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| 50 | enum signalMessageTypes {
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| 51 | typeDiscovery = OverlayMsg::typeSignalingStart + 0x01,
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| 52 | typeLeave = OverlayMsg::typeSignalingStart + 0x02,
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| 53 | };
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| 54 |
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| 55 | typedef chord_routing_table::item route_item;
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| 56 |
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| 57 | use_logging_cpp( Chord );
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| 58 |
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| 59 | Chord::Chord(BaseOverlay& _baseoverlay, const NodeID& _nodeid,
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| 60 | OverlayStructureEvents* _eventsReceiver, const OverlayParameterSet& param) :
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| 61 | OverlayInterface(_baseoverlay, _nodeid, _eventsReceiver, param) {
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| 62 |
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| 63 | // create routing table
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| 64 | <<<<<<< .working
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| 65 | this->table = new chord_routing_table(_nodeid, 2);
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| 66 | =======
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| 67 | this->table = new chord_routing_table(_nodeid, 4);
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| 68 | >>>>>>> .merge-rechts.r5869
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| 69 | orphan_removal_counter = 0;
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| 70 | discovery_count = 0;
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| 71 | stabilize_counter = 0;
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| 72 | stabilize_finger = 0;
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| 73 | }
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| 74 |
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| 75 | Chord::~Chord() {
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| 76 |
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| 77 | // delete routing table
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| 78 | delete table;
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| 79 | }
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| 80 |
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| 81 | /// helper: sets up a link using the base overlay
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| 82 | LinkID Chord::setup(const EndpointDescriptor& endpoint, const NodeID& remote ) {
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| 83 |
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| 84 | // check if we already have a connection
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| 85 | for (int i=0; i<table->size(); i++)
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| 86 | if ((*table)[i]->ref_count > 0 && (*table)[i]->id == remote && !((*table)[i]->info.isUnspecified()))
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| 87 | return LinkID::UNSPECIFIED;
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| 88 |
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| 89 | // check if we are already trying to establish a link
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| 90 | for (size_t i=0; i<pending.size(); i++)
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| 91 | if ( pending[i] == remote ) {
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| 92 | logging_debug("Already trying to establish a link to node "
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| 93 | << remote.toString() );
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| 94 | return LinkID::UNSPECIFIED;
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| 95 | }
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| 96 |
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| 97 | // adding node to list of pending connections
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| 98 | pending.push_back( remote );
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| 99 |
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| 100 | logging_info("Request to setup link to " << endpoint.toString() );
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| 101 |
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| 102 | // establish link via base overlay
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| 103 | <<<<<<< .working
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| 104 | return baseoverlay.establishLink(endp, node, OverlayInterface::OVERLAY_SERVICE_ID, remoteRelay );
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| 105 | =======
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| 106 | return baseoverlay.establishLink( endpoint, remote,
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| 107 | OverlayInterface::OVERLAY_SERVICE_ID );
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| 108 | >>>>>>> .merge-rechts.r5869
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| 109 | }
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| 110 |
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| 111 | /// helper: sends a message using the "base overlay"
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| 112 | seqnum_t Chord::send( OverlayMsg* msg, const LinkID& link ) {
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| 113 | if (link.isUnspecified()) return 0;
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| 114 | msg->setRelayed(true);
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| 115 | return baseoverlay.send_link( msg, link );
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| 116 | }
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| 117 |
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| 118 | /// sends a discovery message
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| 119 | void Chord::send_discovery_to(const NodeID& remote, int ttl) {
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| 120 | LinkID link = getNextLinkId(remote);
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| 121 | if ( remote == nodeid || link.isUnspecified()) return;
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| 122 | if ( table->size() == 0 ) return;
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| 123 |
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| 124 | OverlayMsg msg( typeDiscovery );
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| 125 | msg.setRelayed(true);
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| 126 | Discovery dmsg( Discovery::normal, (uint8_t)2, baseoverlay.getEndpointDescriptor() );
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| 127 | msg.encapsulate(&dmsg);
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| 128 |
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| 129 | <<<<<<< .working
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| 130 | // get next hop
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| 131 | const route_item* item = table->get_next_hop(destination);
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| 132 | if (item!=NULL && !item->info.isUnspecified()) send(&cmsg, item->info);
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| 133 | =======
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| 134 | // send to node
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| 135 | baseoverlay.send_node( &msg, remote );
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| 136 | >>>>>>> .merge-rechts.r5869
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| 137 | }
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| 138 |
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| 139 | void Chord::discover_neighbors( const LinkID& link ) {
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| 140 | uint8_t ttl = 2;
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| 141 | {
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| 142 | // send predecessor discovery
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| 143 | OverlayMsg msg( typeDiscovery );
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| 144 | msg.setRelayed(true);
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| 145 | Discovery dmsg( Discovery::predecessor, ttl,
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| 146 | baseoverlay.getEndpointDescriptor() );
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| 147 | msg.encapsulate(&dmsg);
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| 148 | send(&msg, link);
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| 149 | }
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| 150 | {
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| 151 | // send successor discovery
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| 152 | OverlayMsg msg( typeDiscovery );
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| 153 | msg.setSourceEndpoint( baseoverlay.getEndpointDescriptor() );
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| 154 | msg.setRelayed(true);
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| 155 | Discovery dmsg( Discovery::successor, ttl,
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| 156 | baseoverlay.getEndpointDescriptor() );
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| 157 | msg.encapsulate(&dmsg);
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| 158 | send(&msg, link);
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| 159 | }
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| 160 | }
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| 161 |
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| 162 |
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| 163 | void Chord::createOverlay() {
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| 164 | }
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| 165 |
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| 166 | void Chord::deleteOverlay() {
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| 167 |
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| 168 | }
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| 169 |
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| 170 | void Chord::joinOverlay(const EndpointDescriptor& boot) {
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| 171 | logging_info( "joining Chord overlay structure through end-point " <<
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| 172 | (boot.isUnspecified() ? "local" : boot.toString()) );
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| 173 |
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| 174 | // initiator? no->setup first link
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| 175 | if (!boot.isUnspecified())
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| 176 | bootstrapLinks.push_back( setup(boot) );
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| 177 |
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| 178 | // timer for stabilization management
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| 179 | Timer::setInterval(1000);
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| 180 | Timer::start();
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| 181 | }
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| 182 |
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| 183 | void Chord::leaveOverlay() {
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| 184 | Timer::stop();
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| 185 | for (size_t i = 0; i < table->size(); i++) {
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| 186 | route_item* it = (*table)[i];
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| 187 | OverlayMsg msg( typeLeave );
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| 188 | send( &msg, it->info );
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| 189 | }
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| 190 | }
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| 191 |
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| 192 | /// @see OverlayInterface.h
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| 193 | const EndpointDescriptor& Chord::resolveNode(const NodeID& node) {
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| 194 | const route_item* item = table->get(node);
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| 195 | if (item == NULL || item->info.isUnspecified()) return EndpointDescriptor::UNSPECIFIED();
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| 196 | return baseoverlay.getEndpointDescriptor(item->info);
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| 197 | }
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| 198 |
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| 199 | /// @see OverlayInterface.h
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| 200 | const LinkID& Chord::getNextLinkId( const NodeID& id ) const {
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| 201 | // get next hop
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| 202 | <<<<<<< .working
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| 203 | const route_item* item = table->get_next_hop(destnode);
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| 204 | =======
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| 205 | const route_item* item = table->get_next_hop(id);
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| 206 | >>>>>>> .merge-rechts.r5869
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| 207 |
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| 208 | <<<<<<< .working
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| 209 | // message for this node? yes-> delegate to base overlay
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| 210 | if (item->id == nodeid || destnode == nodeid)
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| 211 | baseoverlay.incomingRouteMessage( msg, LinkID::UNSPECIFIED, nodeid );
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| 212 | =======
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| 213 | // returns a unspecified id when this is itself
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| 214 | if (item == NULL || item->id == nodeid)
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| 215 | return LinkID::UNSPECIFIED;
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| 216 | >>>>>>> .merge-rechts.r5869
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| 217 |
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| 218 | <<<<<<< .working
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| 219 | else { // no-> send to next hop
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| 220 | ChordMessage cmsg(ChordMessage::route, nodeid, destnode);
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| 221 | cmsg.encapsulate(msg);
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| 222 | send(&cmsg, item->info);
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| 223 | }
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| 224 | =======
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| 225 | /// return routing info
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| 226 | return item->info;
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| 227 | >>>>>>> .merge-rechts.r5869
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| 228 | }
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| 229 |
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| 230 | <<<<<<< .working
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| 231 | /// @see OverlayInterface.h
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| 232 | void Chord::routeMessage(const NodeID& node, const LinkID& link, Message* msg) {
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| 233 | logging_debug("Redirect over Chord to node id=" << node.toString()
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| 234 | << " link id=" << link.toString() );
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| 235 | ChordMessage cmsg(ChordMessage::route, nodeid, node);
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| 236 | cmsg.encapsulate(msg);
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| 237 | send(&cmsg, link);
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| 238 | }
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| 239 |
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| 240 | /// @see OverlayInterface.h
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| 241 | const LinkID& Chord::getNextLinkId( const NodeID& id ) const {
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| 242 | // get next hop
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| 243 | const route_item* item = table->get_next_hop(id);
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| 244 |
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| 245 | // returns a unspecified id when this is itself
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| 246 | if (item == NULL || item->id == nodeid)
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| 247 | return LinkID::UNSPECIFIED;
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| 248 |
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| 249 | /// return routing info
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| 250 | return item->info;
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| 251 | }
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| 252 |
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| 253 | =======
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| 254 | >>>>>>> .merge-rechts.r5869
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| 255 | OverlayInterface::NodeList Chord::getKnownNodes(bool deep) const {
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| 256 | OverlayInterface::NodeList nodelist;
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| 257 |
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| 258 | if( deep ){
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| 259 | // all nodes that I know, fingers, succ/pred
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| 260 | for (size_t i = 0; i < table->size(); i++){
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| 261 | if ((*table)[i]->ref_count != 0
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| 262 | && !(*table)[i]->info.isUnspecified())
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| 263 | nodelist.push_back((*table)[i]->id);
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| 264 | }
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| 265 | } else {
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| 266 | // only succ and pred
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| 267 | if( table->get_predesessor() != NULL ){
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| 268 | nodelist.push_back( *(table->get_predesessor()) );
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| 269 | }
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| 270 | if( table->get_successor() != NULL ){
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| 271 | OverlayInterface::NodeList::iterator i =
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| 272 | std::find( nodelist.begin(), nodelist.end(), *(table->get_successor()) );
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| 273 | if( i == nodelist.end() )
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| 274 | nodelist.push_back( *(table->get_successor()) );
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| 275 | }
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| 276 | }
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| 277 |
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| 278 | return nodelist;
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| 279 | }
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| 280 |
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| 281 | /// @see CommunicationListener.h
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| 282 | /// @see OverlayInterface.h
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| 283 | void Chord::onLinkUp(const LinkID& lnk, const NodeID& remote) {
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| 284 | logging_info("link_up: link=" << lnk.toString() << " remote=" <<
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| 285 | remote.toString() );
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| 286 | for (vector<NodeID>::iterator i=pending.begin(); i!=pending.end(); i++)
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| 287 | if (*i == remote) {
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| 288 | pending.erase(i);
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| 289 | break;
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| 290 | }
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| 291 | /*
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| 292 | // check if we already have a connection, yes-> do not handle duplicate!
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| 293 | for (int i=0; i<table->size(); i++)
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| 294 | if ((*table)[i]->id == remote && !((*table)[i]->info.isUnspecified()) && (*table)[i]->info != lnk) {
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| 295 |
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| 296 | return;
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| 297 | }
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| 298 | */
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| 299 | if (remote==nodeid) {
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| 300 | baseoverlay.dropLink(lnk);
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| 301 | return;
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| 302 | }
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| 303 |
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| 304 | route_item* item = table->insert(remote);
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| 305 |
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| 306 | // item added to routing table?
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| 307 | if (item != NULL) { // yes-> add to routing table
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| 308 | logging_info("new routing neighbor: " << remote.toString()
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| 309 | << " with link " << lnk.toString());
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| 310 | // replace with new link
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| 311 | if (!item->info.isUnspecified() || item->info!=lnk)
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| 312 | baseoverlay.dropLink(item->info);
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| 313 | item->info = lnk;
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| 314 | // discover neighbors of new overlay neighbor
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| 315 | discover_neighbors( lnk );
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| 316 | showLinks();
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| 317 | } else { // no-> add orphan entry to routing table
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| 318 | logging_info("new orphan: " << remote.toString()
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| 319 | << " with link " << lnk.toString());
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| 320 | table->insert_orphan(remote)->info = lnk;
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| 321 | }
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| 322 |
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| 323 | // erase bootstrap link
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| 324 | vector<LinkID>::iterator it = std::find(bootstrapLinks.begin(), bootstrapLinks.end(), lnk);
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| 325 | if( it != bootstrapLinks.end() ) bootstrapLinks.erase( it );
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| 326 | }
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| 327 |
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| 328 | /// @see CommunicationListener.h or @see OverlayInterface.h
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| 329 | void Chord::onLinkDown(const LinkID& lnk, const NodeID& remote) {
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| 330 | logging_debug("link_down: link=" << lnk.toString() << " remote=" <<
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| 331 | remote.toString() );
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| 332 |
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| 333 | // remove link from routing table
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| 334 | route_item* item = table->get(remote);
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| 335 | if (item!=NULL && item->info==lnk) {
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| 336 | item->info = LinkID::UNSPECIFIED;
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| 337 | table->remove(remote);
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| 338 | }
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| 339 | }
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| 340 |
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| 341 | /// @see CommunicationListener.h
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| 342 | /// @see OverlayInterface.h
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| 343 | void Chord::onMessage(const DataMessage& msg, const NodeID& remote,
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| 344 | const LinkID& link) {
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| 345 |
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| 346 | // decode message
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| 347 | OverlayMsg* m = dynamic_cast<OverlayMsg*>(msg.getMessage());
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| 348 | if (m == NULL) return;
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| 349 |
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| 350 | // handle messages
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| 351 | switch (m->getType()) {
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| 352 |
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| 353 | <<<<<<< .working
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| 354 | // invalid message
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| 355 | case M::invalid:
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| 356 | break;
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| 357 |
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| 358 | // route message with payload
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| 359 | case M::route: {
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| 360 | // find next hop
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| 361 | const route_item* item = table->get_next_hop(m->getDestination());
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| 362 |
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| 363 | // next hop == myself?
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| 364 | if (m->getDestination() == nodeid) { // yes-> route to base overlay
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| 365 | logging_debug("Send message to baseoverlay");
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| 366 | baseoverlay.incomingRouteMessage( m, item->info, remote );
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| 367 | }
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| 368 | // no-> route to next hop
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| 369 | else {
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| 370 | logging_debug("Route chord message to "
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| 371 | << item->id.toString() << " (destination=" << m->getDestination() << ")");
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| 372 | send(m, item->info);
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| 373 | }
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| 374 | break;
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| 375 | }
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| 376 |
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| 377 | // discovery request
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| 378 | case M::discovery: {
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| 379 | =======
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| 380 | // discovery request
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| 381 | case typeDiscovery: {
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| 382 | >>>>>>> .merge-rechts.r5869
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| 383 | // decapsulate message
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| 384 | Discovery* dmsg = m->decapsulate<Discovery> ();
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| 385 | logging_debug("Received discovery message with"
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| 386 | << " src=" << m->getSourceNode().toString()
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| 387 | << " dst=" << m->getDestinationNode().toString()
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| 388 | << " ttl=" << (int)dmsg->getTTL()
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| 389 | << " type=" << (int)dmsg->getType()
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| 390 | );
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| 391 |
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| 392 | // check if source node can be added to routing table and setup link
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| 393 | if (m->getSourceNode() != nodeid
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| 394 | && table->is_insertable(m->getSourceNode()))
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| 395 | setup( dmsg->getEndpoint(), m->getSourceNode() );
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| 396 |
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| 397 | // delegate discovery message
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| 398 | switch (dmsg->getType()) {
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| 399 |
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| 400 | // normal: route discovery message like every other message
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| 401 | case Discovery::normal: {
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| 402 | // closest node? yes-> split to follow successor and predecessor
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| 403 | if ( table->is_closest_to(m->getDestinationNode()) ) {
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| 404 |
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| 405 | if (table->get_successor() != NULL) {
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| 406 | OverlayMsg omsg(*m);
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| 407 | dmsg->setType(Discovery::successor);
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| 408 | omsg.encapsulate(dmsg);
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| 409 | route_item* succ_item = table->get(*table->get_successor());
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| 410 | logging_debug("Discovery split: routing discovery message to successor "
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| 411 | << succ_item->id.toString() );
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| 412 | <<<<<<< .working
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| 413 | send(&cmsg_s, succ_item->info);
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| 414 | =======
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| 415 | send(&omsg, succ_item->info);
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| 416 | >>>>>>> .merge-rechts.r5869
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| 417 | }
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| 418 |
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| 419 | // send predecessor message
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| 420 | if (table->get_predesessor() != NULL) {
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| 421 | OverlayMsg omsg(*m);
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| 422 | dmsg->setType(Discovery::predecessor);
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| 423 | omsg.encapsulate(dmsg);
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| 424 | route_item* pred_item = table->get(
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| 425 | *table->get_predesessor());
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| 426 | logging_debug("Discovery split: routing discovery message to predecessor "
|
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| 427 | << pred_item->id.toString() );
|
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| 428 | <<<<<<< .working
|
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| 429 | send(&cmsg_p, pred_item->info);
|
---|
| 430 | =======
|
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| 431 | send( &omsg, pred_item->info);
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| 432 | >>>>>>> .merge-rechts.r5869
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| 433 | }
|
---|
| 434 | }
|
---|
| 435 | // no-> route message
|
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| 436 | else {
|
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| 437 | <<<<<<< .working
|
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| 438 | // find next hop
|
---|
| 439 | const route_item* item = table->get_next_hop(m->getDestination());
|
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| 440 | if (item == NULL || item->id == nodeid) break;
|
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| 441 | logging_debug("routing discovery message to " <<
|
---|
| 442 | item->id.toString() );
|
---|
| 443 | send(m, item->info);
|
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| 444 | =======
|
---|
| 445 | baseoverlay.send( m, m->getDestinationNode() );
|
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| 446 | >>>>>>> .merge-rechts.r5869
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| 447 | }
|
---|
| 448 | break;
|
---|
| 449 | }
|
---|
| 450 |
|
---|
| 451 | // successor mode: follow the successor until TTL is zero
|
---|
| 452 | case Discovery::successor:
|
---|
| 453 | case Discovery::predecessor: {
|
---|
| 454 | // time to live ended? yes-> stop routing
|
---|
| 455 | if (dmsg->getTTL() == 0 || dmsg->getTTL() > 10) break;
|
---|
| 456 |
|
---|
| 457 | // decrease time-to-live
|
---|
| 458 | dmsg->setTTL(dmsg->getTTL() - 1);
|
---|
| 459 |
|
---|
| 460 | const route_item* item = NULL;
|
---|
| 461 | if (dmsg->getType() == Discovery::successor &&
|
---|
| 462 | table->get_successor() != NULL) {
|
---|
| 463 | item = table->get(*table->get_successor());
|
---|
| 464 | } else {
|
---|
| 465 | if (table->get_predesessor()!=NULL)
|
---|
| 466 | item = table->get(*table->get_predesessor());
|
---|
| 467 | }
|
---|
| 468 | if (item == NULL) break;
|
---|
| 469 | logging_debug("routing discovery message to succ/pred "
|
---|
| 470 | << item->id.toString() );
|
---|
| 471 | OverlayMsg omsg(*m);
|
---|
| 472 | omsg.encapsulate(dmsg);
|
---|
| 473 | omsg.setDestinationNode(item->id);
|
---|
| 474 | baseoverlay.send(&omsg, omsg.getDestinationNode());
|
---|
| 475 | break;
|
---|
| 476 | }}
|
---|
| 477 | delete dmsg;
|
---|
| 478 | break;
|
---|
| 479 | }
|
---|
| 480 |
|
---|
| 481 | // leave
|
---|
| 482 | case typeLeave: {
|
---|
| 483 | if (link!=LinkID::UNSPECIFIED) {
|
---|
| 484 | route_item* item = table->get(remote);
|
---|
| 485 | if (item!=NULL) item->info = LinkID::UNSPECIFIED;
|
---|
| 486 | table->remove(remote);
|
---|
| 487 | baseoverlay.dropLink(link);
|
---|
| 488 | }
|
---|
| 489 | break;
|
---|
| 490 | }}
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | void Chord::eventFunction() {
|
---|
| 494 | stabilize_counter++;
|
---|
| 495 | if (stabilize_counter < 0 || stabilize_counter == 4) {
|
---|
| 496 |
|
---|
| 497 | // reset counter
|
---|
| 498 | stabilize_counter = 0;
|
---|
| 499 |
|
---|
| 500 | // clear pending connections
|
---|
| 501 | pending.clear();
|
---|
| 502 |
|
---|
| 503 | // get number of real neighbors
|
---|
| 504 | size_t numNeighbors = 0;
|
---|
| 505 | for (size_t i = 0; i < table->size(); i++) {
|
---|
| 506 | route_item* it = (*table)[i];
|
---|
| 507 | if (it->ref_count != 0 && !it->info.isUnspecified()) numNeighbors++;
|
---|
| 508 | }
|
---|
| 509 | logging_info("Running stabilization: #links="
|
---|
| 510 | << table->size() << " #neighbors=" << numNeighbors );
|
---|
| 511 |
|
---|
| 512 | // sending discovery
|
---|
| 513 | logging_debug("Sending discovery message to my neighbors and fingers");
|
---|
| 514 | stabilize_finger = ((stabilize_finger+1) % table->get_finger_table_size() );
|
---|
| 515 | const NodeID disc1 = nodeid;
|
---|
| 516 | const NodeID disc2 = table->get_finger_table(stabilize_finger).get_compare().get_center();
|
---|
| 517 | send_discovery_to(disc1);
|
---|
| 518 | if (disc1 != disc2)
|
---|
| 519 | send_discovery_to(disc2);
|
---|
| 520 |
|
---|
| 521 | for (int i=0; i<table->size(); i++) {
|
---|
| 522 | LinkID id = (*table)[i]->info;
|
---|
| 523 | if (!id.isUnspecified()) discover_neighbors(id);
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 | // remove orphan links
|
---|
| 527 | orphan_removal_counter++;
|
---|
| 528 | <<<<<<< .working
|
---|
| 529 | if (orphan_removal_counter <0 || orphan_removal_counter >= 4) {
|
---|
| 530 | =======
|
---|
| 531 | if (orphan_removal_counter <0 || orphan_removal_counter >= 2) {
|
---|
| 532 | >>>>>>> .merge-rechts.r5869
|
---|
| 533 | logging_info("Running orphan removal");
|
---|
| 534 | orphan_removal_counter = 0;
|
---|
| 535 | for (size_t i = 0; i < table->size(); i++) {
|
---|
| 536 | route_item* it = (*table)[i];
|
---|
| 537 | if (it->ref_count == 0 && !it->info.isUnspecified()) {
|
---|
| 538 | logging_info("Dropping orphaned link " << it->info.toString() << " to " << it->id.toString());
|
---|
| 539 | table->insert(it->id);
|
---|
| 540 | if (it->ref_count==0) {
|
---|
| 541 | LinkID id = it->info;
|
---|
| 542 | it->info = LinkID::UNSPECIFIED;
|
---|
| 543 | baseoverlay.dropLink(id);
|
---|
| 544 | }
|
---|
| 545 | }
|
---|
| 546 | }
|
---|
| 547 | }
|
---|
| 548 | }
|
---|
| 549 | }
|
---|
| 550 |
|
---|
| 551 | void Chord::showLinks() {
|
---|
| 552 | logging_info("--- chord routing information ----------------------------------");
|
---|
| 553 | logging_info("predecessor: " << (table->get_predesessor()==NULL? "<none>" :
|
---|
| 554 | table->get_predesessor()->toString()) );
|
---|
| 555 | logging_info("node_id : " << nodeid.toString() );
|
---|
| 556 | logging_info("successor : " << (table->get_successor()==NULL? "<none>" :
|
---|
| 557 | table->get_successor()->toString()));
|
---|
| 558 | logging_info("----------------------------------------------------------------");
|
---|
| 559 | }
|
---|
| 560 |
|
---|
| 561 | }} // namespace ariba, overlay
|
---|