41 lines
949 B
Go
41 lines
949 B
Go
// Copyright (c) 2023-2024 Onur Cinar.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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// https://github.com/cinar/checker
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package v2
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import (
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"net"
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"reflect"
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)
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const (
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// nameIPv4 is the name of the IPv4 check.
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nameIPv4 = "ipv4"
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)
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var (
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// ErrNotIPv4 indicates that the given value is not a valid IPv4 address.
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ErrNotIPv4 = NewCheckError("NOT_IPV4")
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)
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// IsIPv4 checks if the value is a valid IPv4 address.
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func IsIPv4(value string) (string, error) {
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ip := net.ParseIP(value)
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if ip == nil || ip.To4() == nil {
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return value, ErrNotIPv4
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}
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return value, nil
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}
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// checkIPv4 checks if the value is a valid IPv4 address.
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func checkIPv4(value reflect.Value) (reflect.Value, error) {
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_, err := IsIPv4(value.Interface().(string))
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return value, err
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}
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// makeIPv4 makes a checker function for the IPv4 checker.
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func makeIPv4(_ string) CheckFunc[reflect.Value] {
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return checkIPv4
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}
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