Initial commit

pkg/utils/utils.go

@@ -0,0 +1,33 @@
+// Copyright 2021 Synology Inc.
+
+package utils
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+const UNIT_GB = 1024 * 1024 * 1024
+
+func StringToBoolean(value string) bool {
+	value = strings.ToLower(value)
+	return value == "yes" || value == "true" || value == "1"
+}
+
+// Haven't supported IPv6 yet.
+func LookupIPv4(name string) ([]string, error) {
+	ips, _ := net.LookupIP(name)
+
+	retIps := []string{}
+	for _, ip := range ips {
+		if ipv4 := ip.To4(); ipv4 != nil {
+			retIps = append(retIps, ipv4.String())
+		}
+	}
+	if len(retIps) > 0 {
+		return retIps, nil
+	}
+
+	return nil, fmt.Errorf("Failed to LookupIPv4 by local resolver for: %s", name)
+}