Merge pull request #1299 from libp2p/feat/default-connmgr

default connection manager

defaults.go

@@ -13,6 +13,7 @@ import (
 	rcmgr "github.com/libp2p/go-libp2p-resource-manager"
 	tls "github.com/libp2p/go-libp2p-tls"
 	yamux "github.com/libp2p/go-libp2p-yamux"
+	"github.com/libp2p/go-libp2p/p2p/net/connmgr"
 	"github.com/libp2p/go-tcp-transport"
 	ws "github.com/libp2p/go-ws-transport"
 	"github.com/multiformats/go-multiaddr"
@@ -99,6 +100,16 @@ var DefaultResourceManager = func(cfg *Config) error {
 	return cfg.Apply(ResourceManager(mgr))
 }
 
+// DefaultConnManager creates a default connection manager
+var DefaultConnectionManager = func(cfg *Config) error {
+	mgr, err := connmgr.NewConnManager(160, 192)
+	if err != nil {
+		return err
+	}
+
+	return cfg.Apply(ConnectionManager(mgr))
+}
+
 // Complete list of default options and when to fallback on them.
 //
 // Please *DON'T* specify default options any other way. Putting this all here
@@ -139,6 +150,10 @@ var defaults = []struct {
 		fallback: func(cfg *Config) bool { return cfg.ResourceManager == nil },
 		opt:      DefaultResourceManager,
 	},
+	{
+		fallback: func(cfg *Config) bool { return cfg.ConnManager == nil },
+		opt:      DefaultConnectionManager,
+	},
 }
 
 // Defaults configures libp2p to use the default options. Can be combined with