From c0ad9069327cc41b33486cdbdfd401a26f83d144 Mon Sep 17 00:00:00 2001
From: Robert Hoppe <robert.hoppe@nodemash.com>
Date: Wed, 10 Jul 2024 11:49:13 +0200
Subject: [PATCH] Introduce IPValidation (#217)

Co-authored-by: Robert Hoppe <robert.hoppe@mail.schwarz>
---
 pkg/validate/validate.go      | 13 +++++++++++++
 pkg/validate/validate_test.go | 22 ++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/pkg/validate/validate.go b/pkg/validate/validate.go
index bcad4f4..a209f63 100644
--- a/pkg/validate/validate.go
+++ b/pkg/validate/validate.go
@@ -3,6 +3,7 @@ package validate
 import (
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"reflect"
 	"regexp"
@@ -254,6 +255,18 @@ func Prefix(pr string) error {
 	return nil
 }
 
+// IsIP validates a given IP
+func IsIP(pr string) error {
+	pr = strings.Trim(pr, "\"")
+
+	trial := net.ParseIP(pr)
+	if trial == nil {
+		return fmt.Errorf("given IP: %s. is not valid", pr)
+	}
+
+	return nil
+}
+
 // PublicIP validates a given ID address
 func PublicIP(ip string) error {
 	exp := "((^\\s*((([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))\\s*$)|(^\\s*((([0-9a-f]{1,4}:){7}([0-9a-f]{1,4}|:))|(([0-9a-f]{1,4}:){6}(:[0-9a-f]{1,4}|((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|(([0-9a-f]{1,4}:){5}(((:[0-9a-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|(([0-9a-f]{1,4}:){4}(((:[0-9a-f]{1,4}){1,3})|((:[0-9a-f]{1,4})?:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9a-f]{1,4}:){3}(((:[0-9a-f]{1,4}){1,4})|((:[0-9a-f]{1,4}){0,2}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9a-f]{1,4}:){2}(((:[0-9a-f]{1,4}){1,5})|((:[0-9a-f]{1,4}){0,3}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9a-f]{1,4}:){1}(((:[0-9a-f]{1,4}){1,6})|((:[0-9a-f]{1,4}){0,4}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(:(((:[0-9a-f]{1,4}){1,7})|((:[0-9a-f]{1,4}){0,5}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:)))(%.+)?\\s*$))"
diff --git a/pkg/validate/validate_test.go b/pkg/validate/validate_test.go
index fd1df13..7f5f771 100644
--- a/pkg/validate/validate_test.go
+++ b/pkg/validate/validate_test.go
@@ -394,6 +394,28 @@ func TestPrefix(t *testing.T) {
 	}
 }
 
+func TestIP(t *testing.T) {
+	type args struct {
+		prefix string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{"not ok", args{"999.999.999.999"}, true},
+		{"ok [1]", args{"192.168.1.1"}, false},
+		{"ok [1]", args{"\"192.168.1.1\""}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := validate.IsIP(tt.args.prefix); (err != nil) != tt.wantErr {
+				t.Errorf("IsIP() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
 func TestPublicIP(t *testing.T) {
 	type args struct {
 		ip string