Examples with Path org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path used on opensource projects

Example 31 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class ComplexRouteEntry method createRoute.

@Override
public Route createRoute(final RIBSupport ribSup, final Identifier routeKey, final long pathId, final AddPathBestPath path) {
    final OffsetMap map = getOffsets();
    final Route route = map.getValue(this.values, map.offsetOf(path.getRouteKey()));
    return ribSup.createRoute(route, routeKey, pathId, path.getAttributes());
}

Example 32 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class BaseAbstractRouteEntry method removePathFromDataStore.

@SuppressWarnings("unchecked")
private void removePathFromDataStore(final RouteEntryDependenciesContainer entryDep, final Identifier routeKey, final WriteTransaction tx) {
    LOG.trace("Best Path removed {}", this.removedBestPath);
    final KeyedInstanceIdentifier<Tables, TablesKey> locRibTarget = entryDep.getLocRibTableTarget();
    final RIBSupport ribSup = entryDep.getRibSupport();
    Identifier newRouteKey = ribSup.createNewRouteKey(this.removedBestPath.getPathId(), routeKey);
    if (newRouteKey == null) {
        newRouteKey = routeKey;
    }
    final InstanceIdentifier routeTarget = ribSup.createRouteIdentifier(locRibTarget, newRouteKey);
    LOG.debug("Delete route from LocRib {}", routeTarget);
    tx.delete(LogicalDatastoreType.OPERATIONAL, routeTarget);
    fillAdjRibsOut(null, null, newRouteKey, this.removedBestPath.getPeerId(), entryDep, tx);
}

Example 33 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class BaseAbstractRouteEntry method selectBest.

@Override
public final boolean selectBest(final long localAs) {
    /*
         * FIXME: optimize flaps by making sure we consider stability of currently-selected route.
         */
    final BasePathSelector selector = new BasePathSelector(localAs);
    // Select the best route.
    for (int i = 0; i < this.offsets.size(); ++i) {
        final UnsignedInteger routerId = this.offsets.getRouterKey(i);
        final Attributes attributes = this.offsets.getValue(this.values, i);
        LOG.trace("Processing router id {} attributes {}", routerId, attributes);
        selector.processPath(routerId, attributes);
    }
    // Get the newly-selected best path.
    final BaseBestPath newBestPath = selector.result();
    final boolean modified = newBestPath == null || !newBestPath.equals(this.bestPath);
    if (modified) {
        if (this.offsets.isEmpty()) {
            this.removedBestPath = this.bestPath;
        }
        LOG.trace("Previous best {}, current best {}", this.bestPath, newBestPath);
        this.bestPath = newBestPath;
    }
    return modified;
}

Example 34 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class AddPathAbstractRouteEntry method initializeBestPaths.

@Override
public void initializeBestPaths(final RouteEntryDependenciesContainer entryDependencies, final RouteEntryInfo entryInfo, final WriteTransaction tx) {
    if (this.bestPath != null) {
        final Peer toPeer = entryInfo.getToPeer();
        final TablesKey localTk = entryDependencies.getLocalTablesKey();
        final boolean destPeerSupAddPath = toPeer.supportsAddPathSupported(localTk);
        for (final AddPathBestPath path : this.bestPath) {
            if (!filterRoutes(path.getPeerId(), toPeer, localTk)) {
                continue;
            }
            writeRoutePath(entryInfo, destPeerSupAddPath, path, localTk, entryDependencies, tx);
        }
    }
}

Example 35 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class AbstractBestPathSelector method isExistingPathBetter.

/**
 * Chooses best route according to BGP best path selection.
 *
 * @param state attributes of the new route
 * @return true if the existing path is better, false if the new path is better
 */
protected boolean isExistingPathBetter(@Nonnull final BestPathState state) {
    /*
         * 2. prefer path with higher LOCAL_PREF
         *
         * FIXME: for eBGP cases (when the LOCAL_PREF is missing), we should assign a policy-based preference
         *        before we ever get here.
         */
    if (this.bestState.getLocalPref() == null && state.getLocalPref() != null) {
        return true;
    }
    if (this.bestState.getLocalPref() != null && state.getLocalPref() == null) {
        return false;
    }
    if (state.getLocalPref() != null && state.getLocalPref() > this.bestState.getLocalPref()) {
        return false;
    }
    if (state.getLocalPref() != null && state.getLocalPref() < this.bestState.getLocalPref()) {
        return true;
    }
    // 4. prefer the path with the shortest AS_PATH.
    if (this.bestState.getAsPathLength() != state.getAsPathLength()) {
        return this.bestState.getAsPathLength() < state.getAsPathLength();
    }
    // - IGP is lower than Exterior Gateway Protocol (EGP), and EGP is lower than INCOMPLETE
    if (!this.bestState.getOrigin().equals(state.getOrigin())) {
        final BgpOrigin bo = this.bestState.getOrigin();
        final BgpOrigin no = state.getOrigin();
        // This trick relies on the order in which the values are declared in the model.
        return no.ordinal() > bo.ordinal();
    }
    // FIXME: we should be able to cache the best AS
    final Long bestAs = this.bestState.getPeerAs();
    final Long newAs = state.getPeerAs();
    /*
         * Checks 6 and 7 are mutually-exclusive, as MEDs are comparable
         * only when the routes originated from the same AS. On the other
         * hand, when they are from the same AS, they are in the same iBGP/eBGP
         * relationship.
         *
         */
    if (bestAs.equals(newAs)) {
        // 6. prefer the path with the lowest multi-exit discriminator (MED)
        if (this.bestState.getMultiExitDisc() != null || state.getMultiExitDisc() != null) {
            final Long bmed = this.bestState.getMultiExitDisc();
            final Long nmed = state.getMultiExitDisc();
            return nmed > bmed;
        }
    } else {
        /*
             * 7. prefer eBGP over iBGP paths
             *
             * EBGP is peering between two different AS, whereas IBGP is between same AS (Autonomous System),
             * so we just compare the AS numbers to our AS.
             *
             * FIXME: we should know this information from the peer directly.
             */
        if (this.ourAs != bestAs && this.ourAs == newAs) {
            return true;
        }
    }
    /*
         * 10. Prefer the route that comes from the BGP router with the lowest router ID.
         *
         * This is normally guaranteed by the iteration order of our caller, which runs selection
         * in the order of increasing router ID, but RFC-4456 Route Reflection throws a wrench into that.
         *
         * With RFC-5004, this gets a bit easier, because it completely eliminates step f) and later :-)
         *
         * RFC-5004 states that this algorithm should end here and select existing path over new path in the
         * best path selection process. Benefits are listed in the RFC: @see http://tools.ietf.org/html/rfc500
         * - This algorithm SHOULD NOT be applied when either path is from a BGP Confederation peer.
         *  - not applicable, we don't deal with confederation peers
         * - The algorithm SHOULD NOT be applied when both paths are from peers with an identical BGP identifier
         *   (i.e., there exist parallel BGP sessions between two BGP speakers).
         *  - not applicable, BUG-2631 prevents parallel sessions to be created.
         */
    return true;
}