Cleaned up some of that util

p2p/nat.go

@@ -0,0 +1,23 @@
+package p2p
+
+import (
+	"fmt"
+	"net"
+)
+
+func ParseNAT(natType string, gateway string) (nat NAT, err error) {
+	switch natType {
+	case "UPNP":
+		nat = UPNP()
+	case "PMP":
+		ip := net.ParseIP(gateway)
+		if ip == nil {
+			return nil, fmt.Errorf("cannot resolve PMP gateway IP %s", gateway)
+		}
+		nat = PMP(ip)
+	case "":
+	default:
+		return nil, fmt.Errorf("unrecognised NAT type '%s'", natType)
+	}
+	return
+}