Refactor: new dialer impl

component/dialer/sockopt.go

@@ -0,0 +1,19 @@
+package dialer
+
+func isTCPSocket(network string) bool {
+	switch network {
+	case "tcp", "tcp4", "tcp6":
+		return true
+	default:
+		return false
+	}
+}
+
+func isUDPSocket(network string) bool {
+	switch network {
+	case "udp", "udp4", "udp6":
+		return true
+	default:
+		return false
+	}
+}