Make the Routing Table's latency tolerance configurable.

Author: Vibhav Pant

dht.go

@@ -99,7 +99,7 @@ func New(ctx context.Context, h host.Host, options ...opts.Option) (*IpfsDHT, er
 	if err := cfg.Apply(append([]opts.Option{opts.Defaults}, options...)...); err != nil {
 		return nil, err
 	}
-	dht := makeDHT(ctx, h, cfg.Datastore, cfg.Protocols, cfg.BucketSize)
+	dht := makeDHT(ctx, h, cfg.Datastore, cfg.Protocols, cfg.BucketSize, cfg.RoutingTable.LatencyTolerance)
 	dht.autoRefresh = cfg.RoutingTable.AutoRefresh
 	dht.rtRefreshPeriod = cfg.RoutingTable.RefreshPeriod
 	dht.rtRefreshQueryTimeout = cfg.RoutingTable.RefreshQueryTimeout
@@ -152,9 +152,9 @@ func NewDHTClient(ctx context.Context, h host.Host, dstore ds.Batching) *IpfsDHT
 	return dht
 }
 
-func makeDHT(ctx context.Context, h host.Host, dstore ds.Batching, protocols []protocol.ID, bucketSize int) *IpfsDHT {
+func makeDHT(ctx context.Context, h host.Host, dstore ds.Batching, protocols []protocol.ID, bucketSize int, latency time.Duration) *IpfsDHT {
 	self := kb.ConvertPeerID(h.ID())
-	rt := kb.NewRoutingTable(bucketSize, self, time.Minute, h.Peerstore())
+	rt := kb.NewRoutingTable(bucketSize, self, latency, h.Peerstore())
 	cmgr := h.ConnManager()
 
 	rt.PeerAdded = func(p peer.ID) {

opts/options.go

@@ -34,6 +34,7 @@ type Options struct {
 		RefreshQueryTimeout time.Duration
 		RefreshPeriod       time.Duration
 		AutoRefresh         bool
+		LatencyTolerance    time.Duration
 	}
 }
 
@@ -69,6 +70,13 @@ var Defaults = func(o *Options) error {
 	return nil
 }
 
+func RoutingTableLatencyTolerance(latency time.Duration) Option {
+	return func(o *Options) error {
+		o.RoutingTable.LatencyTolerance = latency
+		return nil
+	}
+}
+
 // RoutingTableRefreshQueryTimeout sets the timeout for routing table refresh
 // queries.
 func RoutingTableRefreshQueryTimeout(timeout time.Duration) Option {