updated validation for middleware options

internal/net/types/cidr.go

@@ -1,45 +1,7 @@
 package types
 
 import (
-	"bytes"
 	"net"
-	"strings"
-
-	E "github.com/yusing/go-proxy/internal/error"
 )
 
-type CIDR net.IPNet
-
-var (
-	ErrInvalidCIDR     = E.New("invalid CIDR")
-	ErrInvalidCIDRType = E.New("invalid CIDR type")
-)
-
-func (cidr *CIDR) ConvertFrom(val any) E.Error {
-	cidrStr, ok := val.(string)
-	if !ok {
-		return ErrInvalidCIDRType.Subjectf("%T", val)
-	}
-
-	if !strings.Contains(cidrStr, "/") {
-		cidrStr += "/32" // single IP
-	}
-	_, ipnet, err := net.ParseCIDR(cidrStr)
-	if err != nil {
-		return ErrInvalidCIDR.Subject(cidrStr)
-	}
-	*cidr = CIDR(*ipnet)
-	return nil
-}
-
-func (cidr *CIDR) Contains(ip net.IP) bool {
-	return (*net.IPNet)(cidr).Contains(ip)
-}
-
-func (cidr *CIDR) String() string {
-	return (*net.IPNet)(cidr).String()
-}
-
-func (cidr *CIDR) Equals(other *CIDR) bool {
-	return (*net.IPNet)(cidr).IP.Equal(other.IP) && bytes.Equal(cidr.Mask, other.Mask)
-}
+type CIDR = net.IPNet