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Send only best routes via Sync. Only apply best routes.

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This commit is contained in:
Milos Gajdos 2020-01-16 16:08:49 +00:00
parent eac2ab3c28
commit eda8b00f84
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GPG Key ID: 8B31058CC55DFD4F
1 changed files with 50 additions and 6 deletions
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56
network/default.go
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@ -850,8 +850,9 @@ func (n *network) processNetChan(listener tunnel.Listener) {
Peer: node,
}
// get a list of all of our routes
routes, err := n.options.Router.Table().List()
// get a list of the best routes for each service in our routing table
q := []router.QueryOption{router.QueryStrategy(router.AdvertiseBest)}
routes, err := n.options.Router.Table().Query(q...)
switch err {
case nil:
// encode the routes to protobuf
@ -1045,9 +1046,51 @@ func (n *network) processNetChan(listener tunnel.Listener) {
// add all the routes we have received in the sync message
for _, pbRoute := range pbNetSync.Routes {
// unmarshal the routes received from remote peer
route := pbUtil.ProtoToRoute(pbRoute)
if err := n.router.Table().Create(route); err != nil && err != router.ErrDuplicateRoute {
log.Debugf("Network node %s failed to add route: %v", n.id, err)
// lookup the best route for the given service in our routing table
q := []router.QueryOption{
router.QueryService(route.Service),
router.QueryStrategy(router.AdvertiseBest),
}
// NOTE: bestRoutes is either an empty slice or one element slice
bestRoutes, err := n.options.Router.Table().Query(q...)
if err != nil {
log.Debugf("Network node %s failed listing best routes for %s: %v", n.id, route.Service, err)
continue
}
// we found no route for given service
// create the route we have just received
if len(bestRoutes) == 0 {
// add routes to the routing table
if err := n.router.Table().Create(route); err != nil && err != router.ErrDuplicateRoute {
log.Debugf("Network node %s failed to add route: %v", n.id, err)
continue
}
}
// Take the best route to given service and:
// * prefer our own routes if metric is the same
// * only add new routes if the metric is better than the metric of our best route
bestRoute := bestRoutes[0]
if bestRoute.Metric == route.Metric {
if route.Router == n.options.Router.Options().Id {
log.Debugf("Network node %s skipping route addition: already has local route", n.id)
continue
}
// NOTE: we might want to skip here, too as we already have equally good route
// add routes to the routing table
if err := n.router.Table().Create(route); err != nil && err != router.ErrDuplicateRoute {
log.Debugf("Network node %s failed to add route: %v", n.id, err)
continue
}
}
if bestRoute.Metric > route.Metric {
// TODO: should we delete our best route here?
// add route to the routing table
if err := n.router.Table().Create(route); err != nil && err != router.ErrDuplicateRoute {
log.Debugf("Network node %s failed to add route: %v", n.id, err)
}
}
}
@ -1328,8 +1371,9 @@ func (n *network) manage() {
Peer: node,
}
// get a list of all of our routes
routes, err := n.options.Router.Table().List()
// get a list of the best routes for each service in our routing table
q := []router.QueryOption{router.QueryStrategy(router.AdvertiseBest)}
routes, err := n.options.Router.Table().Query(q...)
switch err {
case nil:
// encode the routes to protobuf