Initial code commit

pkg/utils/validation.go

@@ -0,0 +1,34 @@
+package utils
+
+import (
+	"fmt"
+	"net"
+	"regexp"
+)
+
+func ValidateIP(ip string) error {
+	if net.ParseIP(ip) == nil {
+		return fmt.Errorf("invalid IP address: %s", ip)
+	}
+	return nil
+}
+
+func ValidateDomain(domain string) error {
+	if domain == "" {
+		return fmt.Errorf("domain cannot be empty")
+	}
+
+	domainRegex := regexp.MustCompile(`^([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$`)
+	if !domainRegex.MatchString(domain) {
+		return fmt.Errorf("invalid domain format: %s", domain)
+	}
+
+	return nil
+}
+
+func ValidatePort(port int) error {
+	if port < 1 || port > 65535 {
+		return fmt.Errorf("invalid port number: %d (must be between 1 and 65535)", port)
+	}
+	return nil
+}