add resolver for router

pkg/handler/option.go

@@ -3,11 +3,13 @@ package handler
 import (
 	"github.com/go-gost/gost/pkg/bypass"
 	"github.com/go-gost/gost/pkg/logger"
+	"github.com/go-gost/gost/pkg/resolver"
 )
 
 type Options struct {
-	Bypass bypass.Bypass
-	Logger logger.Logger
+	Bypass   bypass.Bypass
+	Resolver resolver.Resolver
+	Logger   logger.Logger
 }
 
 type Option func(opts *Options)
@@ -23,3 +25,9 @@ func BypassOption(bypass bypass.Bypass) Option {
 		opts.Bypass = bypass
 	}
 }
+
+func ResolverOption(resolver resolver.Resolver) Option {
+	return func(opts *Options) {
+		opts.Resolver = resolver
+	}
+}