Merge pull request #424 from hacdias/fix/prioritize-closer-peers

fix: prioritize closer peers

dht.go

@@ -28,15 +28,17 @@ import (
 	ds "github.com/ipfs/go-datastore"
 	logging "github.com/ipfs/go-log"
 	"github.com/jbenet/goprocess"
-	"github.com/jbenet/goprocess/context"
+	goprocessctx "github.com/jbenet/goprocess/context"
 	kb "github.com/libp2p/go-libp2p-kbucket"
-	"github.com/libp2p/go-libp2p-record"
+	record "github.com/libp2p/go-libp2p-record"
 	recpb "github.com/libp2p/go-libp2p-record/pb"
 	"github.com/multiformats/go-base32"
 )
 
 var logger = logging.Logger("dht")
 
+const BaseConnMgrScore = 5
+
 // IpfsDHT is an implementation of Kademlia with S/Kademlia modifications.
 // It is used to implement the base Routing module.
 type IpfsDHT struct {
@@ -144,11 +146,13 @@ func NewDHTClient(ctx context.Context, h host.Host, dstore ds.Batching) *IpfsDHT
 }
 
 func makeDHT(ctx context.Context, h host.Host, dstore ds.Batching, protocols []protocol.ID, bucketSize int) *IpfsDHT {
-	rt := kb.NewRoutingTable(bucketSize, kb.ConvertPeerID(h.ID()), time.Minute, h.Peerstore())
+	self := kb.ConvertPeerID(h.ID())
+	rt := kb.NewRoutingTable(bucketSize, self, time.Minute, h.Peerstore())
 	cmgr := h.ConnManager()
 
 	rt.PeerAdded = func(p peer.ID) {
-		cmgr.TagPeer(p, "kbucket", 5)
+		commonPrefixLen := kb.CommonPrefixLen(self, kb.ConvertPeerID(p))
+		cmgr.TagPeer(p, "kbucket", BaseConnMgrScore+commonPrefixLen)
 	}
 
 	rt.PeerRemoved = func(p peer.ID) {