| 1 | // [Licence]
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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 | // [Licence]
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| 38 |
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| 39 | #include "BaseOverlay.h"
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| 40 |
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| 41 | #include "ariba/utility/misc/OvlVis.h"
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| 42 | #include "ariba/NodeListener.h"
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| 43 | #include "ariba/CommunicationListener.h"
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| 44 |
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| 45 | namespace ariba {
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| 46 | namespace overlay {
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| 47 |
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| 48 | use_logging_cpp(BaseOverlay);
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| 49 |
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| 50 | BaseOverlay::BaseOverlay()
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| 51 | : bc(NULL), overlayInterface(NULL),
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| 52 | nodeId(NodeID::UNSPECIFIED), spovnetId(SpoVNetID::UNSPECIFIED),
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| 53 | initiatorLink(LinkID::UNSPECIFIED), state(BaseOverlayStateInvalid){
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| 54 | }
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| 55 |
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| 56 | BaseOverlay::~BaseOverlay(){
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| 57 | }
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| 58 |
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| 59 | void BaseOverlay::start( BaseCommunication& _basecomm, const NodeID& _nodeid ){
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| 60 |
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| 61 | bc = &_basecomm;
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| 62 | nodeId = _nodeid;
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| 63 |
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| 64 | logging_info("creating base overlay");
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| 65 |
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| 66 | bc->registerMessageReceiver( this );
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| 67 | bc->registerEventListener( this );
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| 68 |
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| 69 | ovl.visCreate( ovlId, nodeId, string(""), string("") );
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| 70 | ovl.visChangeNodeColor(ovlId, nodeId, OvlVis::NODE_COLORS_GREY);
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| 71 |
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| 72 | // if (Identifier(Configuration::instance().read<unsigned long>("BASE_nodeid")) ==
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| 73 | // Identifier(Configuration::instance().read<unsigned long>("SOURCE"))) {
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| 74 | // ovl.visChangeNodeIcon(ovlId, nodeId, OvlVis::ICON_ID_CAMERA);
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| 75 | // } else if (Identifier(Configuration::instance().read<unsigned long>("BASE_nodeid")) ==
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| 76 | // Identifier(Configuration::instance().read<unsigned long>("MR_A"))) {
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| 77 | // ovl.visChangeNodeIcon(ovlId, nodeId, OvlVis::ICON_ID_CHARACTER_A);
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| 78 | // } else if (Identifier(Configuration::instance().read<unsigned long>("BASE_nodeid")) ==
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| 79 | // Identifier(Configuration::instance().read<unsigned long>("MR_W"))) {
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| 80 | // ovl.visChangeNodeIcon(ovlId, nodeId, OvlVis::ICON_ID_CHARACTER_W);
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| 81 | // }
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| 82 |
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| 83 | // timer for auto link management
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| 84 | Timer::setInterval( 5000 );
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| 85 | Timer::start();
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| 86 | }
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| 87 |
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| 88 | void BaseOverlay::stop() {
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| 89 |
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| 90 | logging_info("deleting base overlay");
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| 91 |
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| 92 | Timer::stop();
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| 93 | bc->unregisterMessageReceiver( this );
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| 94 | bc->unregisterEventListener( this );
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| 95 | }
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| 96 |
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| 97 | void BaseOverlay::joinSpoVNet(const SpoVNetID& id, const EndpointDescriptor& bootstrapEp){
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| 98 |
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| 99 | ovl.visShowNodeBubble ( ovlId, nodeId, "joining..." );
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| 100 | logging_info( "starting to join spovnet " << id.toString() <<
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| 101 | " with nodeid " << nodeId.toString());
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| 102 |
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| 103 | //
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| 104 | // contact the spovnet initiator and request
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| 105 | // to join. if the join is granted we will
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| 106 | // receive further information on the structure
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| 107 | // of the overlay that is used in the spovnet
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| 108 | //
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| 109 | // but first, we have to establish a link to the initiator...
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| 110 | //
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| 111 |
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| 112 | spovnetId = id;
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| 113 | state = BaseOverlayStateJoinInitiated;
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| 114 |
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| 115 | initiatorLink = bc->establishLink( bootstrapEp );
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| 116 | logging_info("join process initiated for " << id.toString() << "...");
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| 117 | }
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| 118 |
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| 119 | void BaseOverlay::leaveSpoVNet(){
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| 120 |
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| 121 | logging_info( "leaving spovnet " << spovnetId );
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| 122 | bool ret = ( state != this->BaseOverlayStateInvalid );
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| 123 |
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| 124 | logging_debug( "dropping all auto-links ..." );
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| 125 |
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| 126 | // now we start leaving the spovnet: fist delete all links
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| 127 | // that we still have in the baseoverlay initiated by
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| 128 | // some services, the leave the actual overlay structure,
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| 129 | // then leave the spovnet
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| 130 |
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| 131 | // --> drop all service links
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| 132 |
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| 133 | vector<LinkID> servicelinks;
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| 134 | BOOST_FOREACH( LinkPair item, linkMapping ){
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| 135 | if( item.second.service != OverlayInterface::OVERLAY_SERVICE_ID )
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| 136 | servicelinks.push_back( item.first );
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| 137 | }
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| 138 | BOOST_FOREACH( LinkID lnk, servicelinks ){
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| 139 | // the dropLink function will remove
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| 140 | // the item from the linkMapping
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| 141 | dropLink( lnk );
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| 142 | }
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| 143 |
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| 144 | // --> leave overlay structure
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| 145 |
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| 146 | logging_debug( "leaving overlay" );
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| 147 | // first, leave the overlay interface
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| 148 | if( overlayInterface != NULL )
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| 149 | overlayInterface->leaveOverlay();
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| 150 |
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| 151 | // --> leave spovnet
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| 152 |
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| 153 | if( state != BaseOverlayStateInitiator ){
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| 154 |
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| 155 | // then, leave the spovnet baseoverlay
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| 156 | OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeBye, nodeId );
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| 157 | bc->sendMessage( initiatorLink, &overMsg );
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| 158 |
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| 159 | // drop the link and set to correct state
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| 160 | bc->dropLink( initiatorLink );
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| 161 | initiatorLink = LinkID::UNSPECIFIED;
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| 162 | }
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| 163 |
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| 164 | state = BaseOverlayStateInvalid;
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| 165 | ovl.visShutdown( ovlId, nodeId, string("") );
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| 166 |
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| 167 | // inform all registered services of the event
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| 168 | BOOST_FOREACH( NodeListener* i, nodeListeners ){
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| 169 | if( ret ) i->onLeaveCompleted( spovnetId );
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| 170 | else i->onLeaveFailed( spovnetId );
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| 171 | }
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| 172 | }
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| 173 |
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| 174 | void BaseOverlay::createSpoVNet(const SpoVNetID& id, const OverlayParameterSet& param, const SecurityParameterSet& sec, const QoSParameterSet& qos){
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| 175 |
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| 176 | //
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| 177 | // set the state that we are an initiator,
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| 178 | // this way incoming messages are handled correctly
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| 179 | //
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| 180 |
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| 181 | logging_info( "creating spovnet " + id.toString() << " with nodeid " << nodeId.toString() );
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| 182 |
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| 183 | spovnetId = id;
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| 184 | state = BaseOverlayStateInitiator;
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| 185 |
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| 186 | overlayInterface = OverlayFactory::create( *this, param, nodeId, this );
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| 187 | if( overlayInterface == NULL ){
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| 188 | logging_fatal( "overlay structure not supported" );
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| 189 | state = BaseOverlayStateInvalid;
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| 190 | return;
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| 191 | }
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| 192 |
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| 193 | //
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| 194 | // bootstrap against ourselfs
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| 195 | //
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| 196 |
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| 197 | overlayInterface->joinOverlay();
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| 198 | BOOST_FOREACH( NodeListener* i, nodeListeners ){
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| 199 | i->onJoinCompleted( spovnetId );
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| 200 | }
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| 201 |
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| 202 | ovl.visChangeNodeIcon ( ovlId, nodeId, OvlVis::ICON_ID_CAMERA );
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| 203 | ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN);
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| 204 | }
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| 205 |
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| 206 | const LinkID BaseOverlay::establishLink(const NodeID& node, const ServiceID& service){
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| 207 |
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| 208 | // TODO: if this is not a onehop overlay the operation will go asynchronously
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| 209 | const EndpointDescriptor& endpoint = overlayInterface->resolveNode( node );
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| 210 | if( endpoint == EndpointDescriptor::UNSPECIFIED ){
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| 211 | logging_error( "could not resolve node to endpoint. unable to establish link" );
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| 212 | return LinkID::UNSPECIFIED;
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| 213 | }
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| 214 |
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| 215 | logging_debug( "baseoverlay called to establish link between node " <<
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| 216 | node.toString() << " on endpoint " << endpoint.toString() <<
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| 217 | " for service " << service.toString() );
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| 218 |
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| 219 | return establishLink( endpoint, service );
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| 220 | }
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| 221 |
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| 222 | const LinkID BaseOverlay::establishLink(const EndpointDescriptor& ep, const ServiceID& service){
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| 223 |
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| 224 | if( !communicationListeners.contains( service ) ){
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| 225 | logging_error( "no registered listener on serviceid " << service.toString() );
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| 226 | return LinkID::UNSPECIFIED;
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| 227 | }
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| 228 |
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| 229 | const LinkID link = bc->establishLink( ep );
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| 230 |
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| 231 | CommunicationListener* receiver = communicationListeners.get( service );
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| 232 | LinkItem item (link, NodeID::UNSPECIFIED, service, receiver);
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| 233 | linkMapping.insert( make_pair(link, item) );
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| 234 |
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| 235 | return link;
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| 236 | }
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| 237 |
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| 238 | void BaseOverlay::dropLink(const LinkID& link){
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| 239 |
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| 240 | logging_debug( "baseoverlay dropping link " << link.toString() );
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| 241 | LinkMapping::iterator i = linkMapping.find( link );
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| 242 |
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| 243 | if( i == linkMapping.end() ){
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| 244 | logging_warn( "can't drop link, mapping unknown " << link.toString() );
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| 245 | return;
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| 246 | }
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| 247 |
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| 248 | linkMapping.erase( i );
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| 249 |
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| 250 | LinkItem item = i->second;
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| 251 | bc->dropLink( link );
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| 252 |
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| 253 | if( item.interface != NULL )
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| 254 | item.interface->onLinkDown( link, item.node );
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| 255 | }
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| 256 |
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| 257 | seqnum_t BaseOverlay::sendMessage(const Message* message, const LinkID& link ){
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| 258 |
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| 259 | logging_debug( "baseoverlay is sending message on link " << link.toString() );
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| 260 |
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| 261 | LinkMapping::iterator i = linkMapping.find( link );
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| 262 | if( i == linkMapping.end() ){
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| 263 | logging_error( "could not send message. link not found " << link.toString() );
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| 264 | return -1;
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| 265 | }
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| 266 |
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| 267 | OverlayMsg overmsg( OverlayMsg::OverlayMessageTypeData, i->second.service, nodeId );
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| 268 | overmsg.encapsulate( const_cast<Message*>(message) );
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| 269 |
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| 270 | i->second.markused();
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| 271 | return bc->sendMessage( link, &overmsg );
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| 272 | }
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| 273 |
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| 274 | seqnum_t BaseOverlay::sendMessage(const Message* message, const NodeID& node, const ServiceID& service){
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| 275 |
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| 276 | LinkID link = LinkID::UNSPECIFIED;
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| 277 |
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| 278 | LinkMapping::iterator i = linkMapping.begin();
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| 279 | LinkMapping::iterator iend = linkMapping.end();
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| 280 |
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| 281 | for( ; i != iend; i++ ){
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| 282 | if( i->second.node == node && i->second.service == service ){
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| 283 | link = i->second.link;
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| 284 | break;
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| 285 | }
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| 286 | }
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| 287 |
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| 288 | if( link == LinkID::UNSPECIFIED ){
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| 289 |
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| 290 | logging_info( "no link could be found to send message to node " <<
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| 291 | node.toString() << " for service " << service.toString() <<
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| 292 | ". creating auto link ...");
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| 293 |
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| 294 | link = establishLink( node, service );
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| 295 | LinkMapping::iterator i = linkMapping.find( link );
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| 296 |
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| 297 | if( i == linkMapping.end() || link == LinkID::UNSPECIFIED ){
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| 298 | logging_error( "failed to establish auto link to node " << node.toString() <<
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| 299 | " for service " << service.toString() );
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| 300 | return -1;
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| 301 | }
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| 302 |
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| 303 | i->second.autolink = true;
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| 304 |
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| 305 | logging_debug( "establishing autolink in progress to node "
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| 306 | << node.toString() << " with new link-id " << link.toString() );
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| 307 |
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| 308 | } // if( link != LinkID::UNSPECIFIED )
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| 309 |
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| 310 | assert( link != LinkID::UNSPECIFIED );
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| 311 |
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| 312 | // mark the link as used, as we
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| 313 | // now send a message through it
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| 314 | i->second.markused();
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| 315 |
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| 316 | // send the message through the new link. the link may not be functional,
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| 317 | // but for us there is a link-id so we can send messages through it. if
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| 318 | // the link is not yet up and the message needs to be cached, this is the
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| 319 | // task of the BaseCommunication, it will cache and send it later.
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| 320 | return sendMessage( message, link );
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| 321 | }
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| 322 |
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| 323 | const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(const LinkID& link) const {
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| 324 |
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| 325 | return bc->getEndpointDescriptor( link );
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| 326 | }
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| 327 |
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| 328 | const EndpointDescriptor& BaseOverlay::getEndpointDescriptor(const NodeID& node) const {
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| 329 |
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| 330 | if( node == nodeId || node == NodeID::UNSPECIFIED )
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| 331 | return bc->getEndpointDescriptor();
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| 332 |
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| 333 | if( overlayInterface == NULL ){
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| 334 | logging_error( "overlay interface not set, cannot resolve endpoint" );
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| 335 | return EndpointDescriptor::UNSPECIFIED;
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| 336 | }
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| 337 |
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| 338 | // TODO: if this is not a onehop overlay the operation will go asynchronously
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| 339 | return overlayInterface->resolveNode( node );
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| 340 | }
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| 341 |
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| 342 | bool BaseOverlay::bind(CommunicationListener* listener, const ServiceID& sid){
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| 343 | logging_debug( "binding communication listener " << listener
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| 344 | << " on serviceid " << sid.toString() );
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| 345 |
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| 346 | if( communicationListeners.contains( sid ) ){
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| 347 | logging_error( "some listener already registered for service id "
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| 348 | << sid.toString() );
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| 349 | return false;
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| 350 | }
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| 351 |
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| 352 | communicationListeners.registerItem( listener, sid );
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| 353 | return true;
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| 354 | }
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| 355 |
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| 356 | bool BaseOverlay::unbind(CommunicationListener* listener, const ServiceID& sid){
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| 357 | logging_debug( "unbinding listener " << listener
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| 358 | << " from serviceid " << sid.toString() );
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| 359 |
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| 360 | if( !communicationListeners.contains( sid ) ){
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| 361 | logging_warn( "cannot unbind listener. no listener registered on service id " << sid.toString() );
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| 362 | return false;
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| 363 | }
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| 364 |
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| 365 | if( communicationListeners.get(sid) != listener ){
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| 366 | logging_warn( "listener bound to service id " << sid.toString()
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| 367 | << " is different than listener trying to unbind" );
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| 368 | return false;
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| 369 | }
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| 370 |
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| 371 | communicationListeners.unregisterItem( sid );
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| 372 | return true;
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| 373 | }
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| 374 |
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| 375 | bool BaseOverlay::bind(NodeListener* listener){
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| 376 | logging_debug( "binding node listener " << listener );
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| 377 |
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| 378 | NodeListenerVector::iterator i = find( nodeListeners.begin(), nodeListeners.end(), listener );
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| 379 | if( i != nodeListeners.end() ){
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| 380 | logging_warn( "node listener " << listener << " is already bound, cannot bind" );
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| 381 | return false;
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| 382 | }
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| 383 |
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| 384 | nodeListeners.push_back( listener );
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| 385 | return true;
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| 386 | }
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| 387 |
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| 388 | bool BaseOverlay::unbind(NodeListener* listener){
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| 389 | logging_debug( "unbinding node listener " << listener );
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| 390 |
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| 391 | NodeListenerVector::iterator i = find( nodeListeners.begin(), nodeListeners.end(), listener );
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| 392 | if( i == nodeListeners.end() ){
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| 393 | logging_warn( "node listener " << listener << " is not bound, cannot unbind" );
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| 394 | return false;
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| 395 | }
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| 396 |
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| 397 | nodeListeners.erase( i );
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| 398 | return true;
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| 399 | }
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| 400 |
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| 401 | void BaseOverlay::onLinkUp(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
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| 402 |
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| 403 | logging_debug( "base overlay received linkup event " + id.toString() );
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| 404 | // TODO: updateOvlVis( getNodeID(id) );
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| 405 |
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| 406 | //
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| 407 | // if we get up a link while we are in the
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| 408 | // join phase and this is the link that
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| 409 | // we have initiated towards the spovnet owner
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| 410 | // continue the join process by sending
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| 411 | // a join request message through the link
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| 412 | //
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| 413 |
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| 414 | if( state == BaseOverlayStateJoinInitiated && id == initiatorLink){
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| 415 |
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| 416 | logging_info( "join has been initiated by me and the link is now up. " <<
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| 417 | "sending out join request for spovnet " <<
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| 418 | spovnetId.toString() );
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| 419 |
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| 420 | OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeJoinRequest, nodeId );
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| 421 | JoinRequest joinmsg( spovnetId, nodeId );
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| 422 | overMsg.encapsulate( &joinmsg );
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| 423 |
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| 424 | state = BaseOverlayStateJoinInitiated; // state remains in JoinInitiated
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| 425 | bc->sendMessage( id, &overMsg );
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| 426 |
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| 427 | return;
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| 428 |
|
---|
| 429 | } // if( state == BaseOverlayStateJoinInitiated && id == initiatorLink)
|
---|
| 430 |
|
---|
| 431 | //
|
---|
| 432 | // otherwise this is a link initiated by a service
|
---|
| 433 | // then we exchange update messages to exchange the
|
---|
| 434 | // service id and node id for the link. in this case
|
---|
| 435 | // we should have a link mapping for this link. if
|
---|
| 436 | // we have no link mapping this link was initiated by
|
---|
| 437 | // the remote side.
|
---|
| 438 | //
|
---|
| 439 |
|
---|
| 440 | LinkMapping::iterator i = linkMapping.find( id );
|
---|
| 441 |
|
---|
| 442 | if( i == linkMapping.end() ){
|
---|
| 443 |
|
---|
| 444 | LinkItem item (id, NodeID::UNSPECIFIED, ServiceID::UNSPECIFIED, NULL );
|
---|
| 445 | linkMapping.insert( make_pair(id, item) );
|
---|
| 446 |
|
---|
| 447 | } else {
|
---|
| 448 |
|
---|
| 449 | logging_debug( "sending out OverlayMessageTypeUpdate" <<
|
---|
| 450 | " for service " << i->second.service.toString() <<
|
---|
| 451 | " with local node id " << nodeId.toString() <<
|
---|
| 452 | " on link " << id.toString() );
|
---|
| 453 |
|
---|
| 454 | OverlayMsg overMsg(
|
---|
| 455 | OverlayMsg::OverlayMessageTypeUpdate,
|
---|
| 456 | i->second.service,
|
---|
| 457 | nodeId
|
---|
| 458 | );
|
---|
| 459 |
|
---|
| 460 | bc->sendMessage( id, &overMsg );
|
---|
| 461 | i->second.markused();
|
---|
| 462 |
|
---|
| 463 | } // if( i == linkMapping.end() )
|
---|
| 464 |
|
---|
| 465 | // the link is only valid for the service when we receive
|
---|
| 466 | // the OverlayMessageTypeUpdate from the remote node and
|
---|
| 467 | // have the nodeid and serviceid for the link!
|
---|
| 468 | }
|
---|
| 469 |
|
---|
| 470 | void BaseOverlay::onLinkDown(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
|
---|
| 471 |
|
---|
| 472 | logging_debug( "link went down " << id.toString() );
|
---|
| 473 |
|
---|
| 474 | //
|
---|
| 475 | // tell the service that the link went
|
---|
| 476 | // down and remove the mapping
|
---|
| 477 | //
|
---|
| 478 |
|
---|
| 479 | LinkMapping::iterator i = linkMapping.find( id );
|
---|
| 480 | if( i == linkMapping.end() ) {
|
---|
| 481 | // this can also be one of the baseoverlay links that
|
---|
| 482 | // no mapping is stored for. therefore we issue no warning.
|
---|
| 483 | // it can also be a link that has been dropped and the
|
---|
| 484 | // mapping is already deleted in the dropLink function.
|
---|
| 485 | // also, the service notification is issued then in dropLink
|
---|
| 486 | return;
|
---|
| 487 | }
|
---|
| 488 |
|
---|
| 489 | if( i->second.interface != NULL )
|
---|
| 490 | i->second.interface->onLinkDown( id, i->second.node );
|
---|
| 491 |
|
---|
| 492 | linkMapping.erase( i );
|
---|
| 493 | }
|
---|
| 494 |
|
---|
| 495 | void BaseOverlay::onLinkChanged(const LinkID& id, const NetworkLocator* oldlocal, const NetworkLocator* newlocal, const NetworkLocator* oldremote, const NetworkLocator* newremote){
|
---|
| 496 |
|
---|
| 497 | logging_debug( "link changed " << id.toString() );
|
---|
| 498 |
|
---|
| 499 | //
|
---|
| 500 | // tell the service that the link changed
|
---|
| 501 | //
|
---|
| 502 |
|
---|
| 503 | LinkMapping::iterator i = linkMapping.find( id );
|
---|
| 504 | if( i == linkMapping.end() ) return;
|
---|
| 505 |
|
---|
| 506 | if( i->second.interface != NULL ){
|
---|
| 507 | i->second.interface->onLinkChanged( id, i->second.node );
|
---|
| 508 | // call onLinkQoSChanged?
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | i->second.markused();
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | void BaseOverlay::onLinkFail(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote){
|
---|
| 515 |
|
---|
| 516 | logging_debug( "link failed " << id.toString() );
|
---|
| 517 |
|
---|
| 518 | //
|
---|
| 519 | // tell the service that the link failed
|
---|
| 520 | //
|
---|
| 521 |
|
---|
| 522 | LinkMapping::iterator i = linkMapping.find( id );
|
---|
| 523 | if( i == linkMapping.end() ) return;
|
---|
| 524 |
|
---|
| 525 | if( i->second.interface != NULL )
|
---|
| 526 | i->second.interface->onLinkFail( id, i->second.node );
|
---|
| 527 |
|
---|
| 528 | i->second.markused();
|
---|
| 529 | }
|
---|
| 530 |
|
---|
| 531 | void BaseOverlay::onLinkQoSChanged(const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote, const QoSParameterSet& qos) {
|
---|
| 532 |
|
---|
| 533 | logging_debug( "link qos changed " << id.toString() );
|
---|
| 534 |
|
---|
| 535 | //
|
---|
| 536 | // tell the service that the link qos has changed
|
---|
| 537 | //
|
---|
| 538 |
|
---|
| 539 | LinkMapping::iterator i = linkMapping.find( id );
|
---|
| 540 | if( i == linkMapping.end() ) return;
|
---|
| 541 |
|
---|
| 542 | // TODO: convert QoSParameterSet to the LinkProperties properties
|
---|
| 543 | if( i->second.interface != NULL ){
|
---|
| 544 | // TODO: currently not in the interface: i->second.interface->onLinkQoSChanged( id, i->second.node, LinkProperties::DEFAULT );
|
---|
| 545 | }
|
---|
| 546 |
|
---|
| 547 | i->second.markused();
|
---|
| 548 | }
|
---|
| 549 |
|
---|
| 550 | bool BaseOverlay::onLinkRequest( const LinkID& id, const NetworkLocator* local, const NetworkLocator* remote ){
|
---|
| 551 |
|
---|
| 552 | // also see in the receiveMessage function. there the higher layer service
|
---|
| 553 | // is asked whether to accept link requests, but there a basic link association is
|
---|
| 554 | // already built up, so we know the node id
|
---|
| 555 | logging_debug("received link request from " << remote->toString() << ", accepting");
|
---|
| 556 | return true;
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | bool BaseOverlay::receiveMessage(const Message* message,
|
---|
| 560 | const LinkID& link, const NodeID& /*the nodeid is invalid in this case! removed var to prevent errors*/ ){
|
---|
| 561 |
|
---|
| 562 | OverlayMsg* overlayMsg = ((Message*)message)->decapsulate<OverlayMsg>();
|
---|
| 563 | if( overlayMsg == NULL ) return false;
|
---|
| 564 |
|
---|
| 565 | // mark the link as in action
|
---|
| 566 | LinkMapping::iterator item = linkMapping.find( link );
|
---|
| 567 | if( item != linkMapping.end() ) item->second.markused();
|
---|
| 568 |
|
---|
| 569 | //
|
---|
| 570 | // handle user date that we forward to the
|
---|
| 571 | // appropriate service using the service id
|
---|
| 572 | // in the message. as we don't know the class
|
---|
| 573 | // of message that the service handles, we
|
---|
| 574 | // forward it as a pure Message*
|
---|
| 575 | //
|
---|
| 576 |
|
---|
| 577 | if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeData) ) {
|
---|
| 578 |
|
---|
| 579 | logging_debug( "baseoverlay received message of type OverlayMessageTypeData" );
|
---|
| 580 |
|
---|
| 581 | const ServiceID& service = overlayMsg->getService();
|
---|
| 582 | CommunicationListener* serviceListener = communicationListeners.get( service );
|
---|
| 583 |
|
---|
| 584 | logging_debug( "received data for service " << service.toString() );
|
---|
| 585 |
|
---|
| 586 | if( serviceListener != NULL )
|
---|
| 587 | serviceListener->onMessage( overlayMsg, overlayMsg->getSourceNode(), link );
|
---|
| 588 |
|
---|
| 589 | return true;
|
---|
| 590 |
|
---|
| 591 | } // if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeData) )
|
---|
| 592 |
|
---|
| 593 | //
|
---|
| 594 | // handle spovnet instance join requests
|
---|
| 595 | //
|
---|
| 596 |
|
---|
| 597 | else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinRequest) &&
|
---|
| 598 | state == BaseOverlayStateInitiator){
|
---|
| 599 |
|
---|
| 600 | logging_debug( "baseoverlay received message of type OverlayMessageTypeJoinRequest" );
|
---|
| 601 |
|
---|
| 602 | JoinRequest* joinReq = overlayMsg->decapsulate<JoinRequest>();
|
---|
| 603 | logging_info( "received join request for spovnet " <<
|
---|
| 604 | joinReq->getSpoVNetID().toString() );
|
---|
| 605 |
|
---|
| 606 | //
|
---|
| 607 | // make sure that the node actually wants to join
|
---|
| 608 | // the correct spovnet id that we administrate
|
---|
| 609 | //
|
---|
| 610 |
|
---|
| 611 | if( joinReq->getSpoVNetID() != spovnetId ){
|
---|
| 612 | logging_error( "received join request for spovnet we don't handle " <<
|
---|
| 613 | joinReq->getSpoVNetID().toString() );
|
---|
| 614 | return false;
|
---|
| 615 | }
|
---|
| 616 |
|
---|
| 617 | //
|
---|
| 618 | // only if all services allow the node to join it is allowed
|
---|
| 619 | // using the isJoinAllowed interface security policies can be
|
---|
| 620 | // implemented by higher layer services
|
---|
| 621 | //
|
---|
| 622 |
|
---|
| 623 | // TODO: here you can implement mechanisms to deny joining of a node
|
---|
| 624 | bool allow = true;
|
---|
| 625 |
|
---|
| 626 | logging_info( "sending back join reply for spovnet " <<
|
---|
| 627 | spovnetId.toString() << " to node " <<
|
---|
| 628 | overlayMsg->getSourceNode().toString() <<
|
---|
| 629 | ". result: " << (allow ? "allowed" : "denied") );
|
---|
| 630 |
|
---|
| 631 | joiningNodes.push_back( overlayMsg->getSourceNode() );
|
---|
| 632 |
|
---|
| 633 | //
|
---|
| 634 | // send back our spovnetid, default overlay parameters,
|
---|
| 635 | // join allow result, and ourself as the endpoint
|
---|
| 636 | // to bootstrap the overlay against
|
---|
| 637 | //
|
---|
| 638 |
|
---|
| 639 | OverlayMsg retmsg( OverlayMsg::OverlayMessageTypeJoinReply, nodeId );
|
---|
| 640 | JoinReply replyMsg( spovnetId, OverlayParameterSet::DEFAULT,
|
---|
| 641 | allow, getEndpointDescriptor() );
|
---|
| 642 |
|
---|
| 643 | retmsg.encapsulate(&replyMsg);
|
---|
| 644 | bc->sendMessage( link, &retmsg );
|
---|
| 645 |
|
---|
| 646 | return true;
|
---|
| 647 |
|
---|
| 648 | } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinRequest) && state == BaseOverlayStateInitiator)
|
---|
| 649 |
|
---|
| 650 | //
|
---|
| 651 | // handle replies to spovnet instance join requests
|
---|
| 652 | //
|
---|
| 653 |
|
---|
| 654 | else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinReply) &&
|
---|
| 655 | state == BaseOverlayStateJoinInitiated){
|
---|
| 656 |
|
---|
| 657 | logging_debug( "baseoverlay received message of type OverlayMessageTypeJoinReply" );
|
---|
| 658 |
|
---|
| 659 | JoinReply* replyMsg = overlayMsg->decapsulate<JoinReply>();
|
---|
| 660 | logging_info( "received spovnet join reply" );
|
---|
| 661 |
|
---|
| 662 | //
|
---|
| 663 | // make sure that we actually wanted to get
|
---|
| 664 | // into the spovnet whose id is in the message
|
---|
| 665 | //
|
---|
| 666 |
|
---|
| 667 | if( replyMsg->getSpoVNetID() != spovnetId ){
|
---|
| 668 | logging_error( "received spovnet join reply for spovnet " <<
|
---|
| 669 | replyMsg->getSpoVNetID().toString() <<
|
---|
| 670 | " but we wanted to join spovnet " <<
|
---|
| 671 | spovnetId.toString() );
|
---|
| 672 |
|
---|
| 673 | // state does not change here, maybe
|
---|
| 674 | // the reply does come in later
|
---|
| 675 | return false;
|
---|
| 676 | }
|
---|
| 677 |
|
---|
| 678 | //
|
---|
| 679 | // if we did not get access to the spovnet
|
---|
| 680 | // notify of the failure and
|
---|
| 681 | // close the link to the initiator
|
---|
| 682 | //
|
---|
| 683 |
|
---|
| 684 | if( ! replyMsg->getJoinAllowed() ){
|
---|
| 685 |
|
---|
| 686 | logging_error( "our join request has been denied" );
|
---|
| 687 |
|
---|
| 688 | bc->dropLink( initiatorLink );
|
---|
| 689 | initiatorLink = LinkID::UNSPECIFIED;
|
---|
| 690 | state = BaseOverlayStateInvalid;
|
---|
| 691 |
|
---|
| 692 | // inform all registered services of the event
|
---|
| 693 | BOOST_FOREACH( NodeListener* i, nodeListeners ){
|
---|
| 694 | i->onJoinFailed( spovnetId );
|
---|
| 695 | }
|
---|
| 696 |
|
---|
| 697 | return true;
|
---|
| 698 | }
|
---|
| 699 |
|
---|
| 700 | logging_info( "join request has been accepted for spovnet " << spovnetId.toString() );
|
---|
| 701 |
|
---|
| 702 | //
|
---|
| 703 | // if we did get access to the spovnet
|
---|
| 704 | // we try to create the overlay structure
|
---|
| 705 | // as given in the reply message
|
---|
| 706 | //
|
---|
| 707 |
|
---|
| 708 | overlayInterface = OverlayFactory::create( *this, replyMsg->getParam(), nodeId, this );
|
---|
| 709 |
|
---|
| 710 | if( overlayInterface == NULL ){
|
---|
| 711 | logging_error( "overlay structure not supported" );
|
---|
| 712 |
|
---|
| 713 | bc->dropLink( initiatorLink );
|
---|
| 714 | initiatorLink = LinkID::UNSPECIFIED;
|
---|
| 715 | state = BaseOverlayStateInvalid;
|
---|
| 716 |
|
---|
| 717 | // inform all registered services of the event
|
---|
| 718 | BOOST_FOREACH( NodeListener* i, nodeListeners ){
|
---|
| 719 | i->onJoinFailed( spovnetId );
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 | return true;
|
---|
| 723 | }
|
---|
| 724 |
|
---|
| 725 | //
|
---|
| 726 | // now start the join process for the overlay.
|
---|
| 727 | // the join process for the spovnet baseoverlay
|
---|
| 728 | // is now complete. we use the endpoint for
|
---|
| 729 | // overlay structure bootstrapping that the
|
---|
| 730 | // initiator provided in his reply message
|
---|
| 731 | //
|
---|
| 732 |
|
---|
| 733 | state = BaseOverlayStateCompleted;
|
---|
| 734 | ovl.visChangeNodeColor( ovlId, nodeId, OvlVis::NODE_COLORS_GREEN);
|
---|
| 735 |
|
---|
| 736 | overlayInterface->createOverlay();
|
---|
| 737 | overlayInterface->joinOverlay( replyMsg->getBootstrapEndpoint() );
|
---|
| 738 |
|
---|
| 739 | // inform all registered services of the event
|
---|
| 740 | BOOST_FOREACH( NodeListener* i, nodeListeners ){
|
---|
| 741 | i->onJoinCompleted( spovnetId );
|
---|
| 742 | }
|
---|
| 743 |
|
---|
| 744 | return true;
|
---|
| 745 |
|
---|
| 746 | } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeJoinReply) && state == BaseOverlayStateJoinInitiated)
|
---|
| 747 |
|
---|
| 748 |
|
---|
| 749 | //
|
---|
| 750 | // handle update messages for link establishment
|
---|
| 751 | //
|
---|
| 752 |
|
---|
| 753 | else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeUpdate) ){
|
---|
| 754 |
|
---|
| 755 | logging_debug( "baseoverlay received message of type OverlayMessageTypeUpdate" );
|
---|
| 756 |
|
---|
| 757 | const NodeID& sourcenode = overlayMsg->getSourceNode();
|
---|
| 758 | const ServiceID& service = overlayMsg->getService();
|
---|
| 759 |
|
---|
| 760 | //
|
---|
| 761 | // we should have a linkmapping for the link, otherwise
|
---|
| 762 | // we ignore update messages
|
---|
| 763 | //
|
---|
| 764 |
|
---|
| 765 | LinkMapping::iterator i = linkMapping.find( link );
|
---|
| 766 | if( i == linkMapping.end() ){
|
---|
| 767 | logging_warn( "received overlay update message for link " <<
|
---|
| 768 | link.toString() << " for which we have no mapping" );
|
---|
| 769 | return false;
|
---|
| 770 | }
|
---|
| 771 |
|
---|
| 772 | //
|
---|
| 773 | // update our link mapping information for this link
|
---|
| 774 | //
|
---|
| 775 |
|
---|
| 776 | bool changed = ( i->second.node != sourcenode ) || ( i->second.service != service );
|
---|
| 777 |
|
---|
| 778 | i->second.node = sourcenode;
|
---|
| 779 | i->second.service = service;
|
---|
| 780 |
|
---|
| 781 | //
|
---|
| 782 | // if our link information changed, we send out an update, too
|
---|
| 783 | //
|
---|
| 784 |
|
---|
| 785 | if( changed ){
|
---|
| 786 | OverlayMsg overMsg( OverlayMsg::OverlayMessageTypeUpdate, i->second.service, nodeId );
|
---|
| 787 | bc->sendMessage( link, &overMsg );
|
---|
| 788 | }
|
---|
| 789 |
|
---|
| 790 | //
|
---|
| 791 | // set the correct listener service for the linkitem
|
---|
| 792 | // now we can tell the registered service of the linkup event
|
---|
| 793 | //
|
---|
| 794 |
|
---|
| 795 | if( !communicationListeners.contains( service ) ){
|
---|
| 796 | logging_warn( "linkup event for service that has not been registered" );
|
---|
| 797 | return false;
|
---|
| 798 | }
|
---|
| 799 |
|
---|
| 800 | CommunicationListener* iface = communicationListeners.get( service );
|
---|
| 801 | if( iface == NULL ){
|
---|
| 802 | logging_warn( "linkup event for service that has been registered with a NULL interface" );
|
---|
| 803 | return true;
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 | i->second.interface = iface;
|
---|
| 807 | i->second.markused();
|
---|
| 808 |
|
---|
| 809 | //
|
---|
| 810 | // ask the service whether it wants to accept this link
|
---|
| 811 | //
|
---|
| 812 |
|
---|
| 813 | if( iface->onLinkRequest(sourcenode) ){
|
---|
| 814 | iface->onLinkUp( link, sourcenode );
|
---|
| 815 | } else {
|
---|
| 816 | // prevent onLinkDown calls to the service
|
---|
| 817 | i->second.interface = NULL;
|
---|
| 818 | // drop the link
|
---|
| 819 | dropLink( link );
|
---|
| 820 | }
|
---|
| 821 |
|
---|
| 822 | return true;
|
---|
| 823 |
|
---|
| 824 | } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeUpdate) )
|
---|
| 825 |
|
---|
| 826 | //
|
---|
| 827 | // bye messages to say goodbye
|
---|
| 828 | //
|
---|
| 829 |
|
---|
| 830 | else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeBye)){
|
---|
| 831 |
|
---|
| 832 | logging_debug( "baseoverlay received message of type OverlayMessageTypeBye" );
|
---|
| 833 |
|
---|
| 834 | logging_debug( "received bye message from " <<
|
---|
| 835 | overlayMsg->getSourceNode().toString() );
|
---|
| 836 |
|
---|
| 837 | //
|
---|
| 838 | // if we are the initiator and receive a bye from a node
|
---|
| 839 | // the node just left. if we are a node and receive a bye
|
---|
| 840 | // from the initiator, we have to close, too.
|
---|
| 841 | //
|
---|
| 842 |
|
---|
| 843 | if( overlayMsg->getSourceNode() == spovnetInitiator ){
|
---|
| 844 |
|
---|
| 845 | bc->dropLink( initiatorLink );
|
---|
| 846 | initiatorLink = LinkID::UNSPECIFIED;
|
---|
| 847 | state = BaseOverlayStateInvalid;
|
---|
| 848 |
|
---|
| 849 | logging_fatal( "initiator ended spovnet" );
|
---|
| 850 |
|
---|
| 851 | // inform all registered services of the event
|
---|
| 852 | BOOST_FOREACH( NodeListener* i, nodeListeners ){
|
---|
| 853 | i->onLeaveFailed( spovnetId );
|
---|
| 854 | }
|
---|
| 855 |
|
---|
| 856 | } else {
|
---|
| 857 |
|
---|
| 858 | // a node that said goodbye and we are the initiator
|
---|
| 859 | // don't have to do much here, as the node also
|
---|
| 860 | // will go out of the overlay structure
|
---|
| 861 | logging_info( "node left " << overlayMsg->getSourceNode() );
|
---|
| 862 |
|
---|
| 863 | }
|
---|
| 864 |
|
---|
| 865 | return true;
|
---|
| 866 |
|
---|
| 867 | } // else if( overlayMsg->isType(OverlayMsg::OverlayMessageTypeBye))
|
---|
| 868 |
|
---|
| 869 | //
|
---|
| 870 | // something wrong ...
|
---|
| 871 | //
|
---|
| 872 |
|
---|
| 873 | else {
|
---|
| 874 |
|
---|
| 875 | logging_error( "received message in invalid state! don't know " <<
|
---|
| 876 | "what to do with this message of type " <<
|
---|
| 877 | overlayMsg->getType() );
|
---|
| 878 | return false;
|
---|
| 879 |
|
---|
| 880 | } // else
|
---|
| 881 |
|
---|
| 882 | return false;
|
---|
| 883 | }
|
---|
| 884 |
|
---|
| 885 | void BaseOverlay::broadcastMessage(Message* message, const ServiceID& service){
|
---|
| 886 |
|
---|
| 887 | logging_debug( "broadcasting message to all known nodes " <<
|
---|
| 888 | "in the overlay from service " + service.toString() );
|
---|
| 889 |
|
---|
| 890 | OverlayInterface::NodeList nodes = overlayInterface->getKnownNodes();
|
---|
| 891 |
|
---|
| 892 | OverlayInterface::NodeList::iterator i = nodes.begin();
|
---|
| 893 | OverlayInterface::NodeList::iterator iend = nodes.end();
|
---|
| 894 |
|
---|
| 895 | for( ; i != iend; i++ ){
|
---|
| 896 | if( *i == nodeId) continue; // don't send to ourselfs
|
---|
| 897 | sendMessage( message, *i, service );
|
---|
| 898 | }
|
---|
| 899 | }
|
---|
| 900 |
|
---|
| 901 | vector<NodeID> BaseOverlay::getOverlayNeighbors() const {
|
---|
| 902 | // the known nodes _can_ also include our
|
---|
| 903 | // node, so we remove ourselfs
|
---|
| 904 |
|
---|
| 905 | vector<NodeID> nodes = overlayInterface->getKnownNodes();
|
---|
| 906 | vector<NodeID>::iterator i = find( nodes.begin(), nodes.end(), this->nodeId );
|
---|
| 907 | if( i != nodes.end() ) nodes.erase( i );
|
---|
| 908 |
|
---|
| 909 | return nodes;
|
---|
| 910 | }
|
---|
| 911 |
|
---|
| 912 | void BaseOverlay::updateOvlVis( const NodeID& n ) {
|
---|
| 913 | NodeID node = n;
|
---|
| 914 | /* void visShowNodeBubble (
|
---|
| 915 | NETWORK_ID network,
|
---|
| 916 | NodeID& node,
|
---|
| 917 | string label
|
---|
| 918 | );
|
---|
| 919 | */
|
---|
| 920 | using namespace std;
|
---|
| 921 |
|
---|
| 922 | if (node == nodeId || node.isUnspecified()) return;
|
---|
| 923 |
|
---|
| 924 | // min/max
|
---|
| 925 | if ( node < min || min.isUnspecified() ) min = node;
|
---|
| 926 | if ( node > max || max.isUnspecified() ) max = node;
|
---|
| 927 |
|
---|
| 928 | // successor
|
---|
| 929 | if ( succ.isUnspecified() || (node > nodeId && (succ < nodeId || (node-nodeId) < (succ-nodeId))) ) {
|
---|
| 930 | if (!succ.isUnspecified() && node != succ)
|
---|
| 931 | ovl.visDisconnect(ovlId, nodeId, succ, string(""));
|
---|
| 932 | succ = node;
|
---|
| 933 | ovl.visConnect(ovlId, nodeId, succ, string(""));
|
---|
| 934 | }
|
---|
| 935 |
|
---|
| 936 | // set successor (circle-wrap)
|
---|
| 937 | if (succ.isUnspecified() && !min.isUnspecified()) {
|
---|
| 938 | succ = min;
|
---|
| 939 | ovl.visConnect(ovlId, nodeId, succ, string(""));
|
---|
| 940 | }
|
---|
| 941 | }
|
---|
| 942 |
|
---|
| 943 | const NodeID& BaseOverlay::getNodeID(const LinkID& lid) const {
|
---|
| 944 |
|
---|
| 945 | if( lid == LinkID::UNSPECIFIED ) return nodeId;
|
---|
| 946 |
|
---|
| 947 | LinkMapping::const_iterator i = linkMapping.find( lid );
|
---|
| 948 | if( i == linkMapping.end() ) return NodeID::UNSPECIFIED;
|
---|
| 949 | else return i->second.node;
|
---|
| 950 | }
|
---|
| 951 |
|
---|
| 952 | void BaseOverlay::incomingRouteMessage(Message* msg){
|
---|
| 953 | // gets handled as normal data message
|
---|
| 954 | receiveMessage( msg, LinkID::UNSPECIFIED, NodeID::UNSPECIFIED );
|
---|
| 955 | }
|
---|
| 956 |
|
---|
| 957 | void BaseOverlay::onNodeJoin(const NodeID& node){
|
---|
| 958 |
|
---|
| 959 | JoiningNodes::iterator i = std::find( joiningNodes.begin(), joiningNodes.end(), node );
|
---|
| 960 | if( i == joiningNodes.end() ) return;
|
---|
| 961 |
|
---|
| 962 | logging_info( "node has successfully joined baseoverlay and overlay structure "
|
---|
| 963 | << node.toString() );
|
---|
| 964 |
|
---|
| 965 | joiningNodes.erase( i );
|
---|
| 966 | }
|
---|
| 967 |
|
---|
| 968 | void BaseOverlay::eventFunction(){
|
---|
| 969 |
|
---|
| 970 | list<LinkID> oldlinks;
|
---|
| 971 | time_t now = time(NULL);
|
---|
| 972 |
|
---|
| 973 | // first gather all the links from linkMapping that need droppin
|
---|
| 974 | // don't directly drop, as the dropLink function affects the
|
---|
| 975 | // linkMapping structure that we are traversing here.
|
---|
| 976 | // drop links after a timeout of 30s
|
---|
| 977 |
|
---|
| 978 | BOOST_FOREACH( LinkPair item, linkMapping ){
|
---|
| 979 | if( item.second.autolink && difftime(now, item.second.lastuse) > 30)
|
---|
| 980 | oldlinks.push_back( item.first );
|
---|
| 981 | }
|
---|
| 982 |
|
---|
| 983 | BOOST_FOREACH( const LinkID lnk, oldlinks ){
|
---|
| 984 | logging_debug( "auto-link " << lnk.toString() << " timed out and is getting dropped" );
|
---|
| 985 | dropLink( lnk );
|
---|
| 986 | }
|
---|
| 987 | }
|
---|
| 988 |
|
---|
| 989 | }} // namespace ariba, overlay
|
---|