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"
@@ -92,11 +93,17 @@ var DefaultResourceManager = func(cfg *Config) error {
 	SetDefaultServiceLimits(limiter)
 
 	mgr, err := rcmgr.NewResourceManager(limiter)
+	return cfg.Apply(ResourceManager(mgr))
+}
+
+// DefaultConnManager creates a default connection manager
+var DefaultConnectionManager = func(cfg *Config) error {
+	mgr, err := connmgr.NewConnManager(192, 256)
 	if err != nil {
 		return err
 	}
 
-	return cfg.Apply(ResourceManager(mgr))
+	return cfg.Apply(ConnectionManager(mgr))
 }
 
 // Complete list of default options and when to fallback on them.
@@ -139,6 +146,10 @@ 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