diff --git a/cmd/protoplus/main.go b/cmd/protoplus/main.go
index 485d83d..b663d97 100644
--- a/cmd/protoplus/main.go
+++ b/cmd/protoplus/main.go
@@ -23,9 +23,11 @@ var (
 	flagGoOut      = flag.String("go_out", "", "output golang source file")
 	flagCSOut      = flag.String("cs_out", "", "output csharp source file")
 	flagJsonOut    = flag.String("json_out", "", "output json file")
+	flagGoRegOut   = flag.String("goreg_out", "", "output golang message register source file")
 	flagJson       = flag.Bool("json", false, "output json to std out")
 	flagGenReg     = flag.Bool("genreg", false, "gen message register entry")
 	flagStructBase = flag.String("structbase", "IProtoStruct", "struct inherite class type name in c#")
+	flagCodec      = flag.String("codec", "protoplus", "default codec in register entry")
 )
 
 const Version = "2.0.0"
@@ -46,6 +48,7 @@ func main() {
 	ctx.PackageName = *flagPackage
 	ctx.StructBase = *flagStructBase
 	ctx.RegEntry = *flagGenReg
+	ctx.Codec = *flagCodec
 
 	err = util.ParseFileList(ctx.DescriptorSet)
 
@@ -63,6 +66,16 @@ func main() {
 		}
 	}
 
+	if *flagGoRegOut != "" {
+		ctx.OutputFileName = *flagGoRegOut
+
+		err = golang.GenGoReg(&ctx)
+
+		if err != nil {
+			goto OnError
+		}
+	}
+
 	if *flagCSOut != "" {
 		ctx.OutputFileName = *flagCSOut
 
diff --git a/gen/gogopb/gen_proto.go b/gen/gogopb/gen_proto.go
index 0266934..32a15b1 100644
--- a/gen/gogopb/gen_proto.go
+++ b/gen/gogopb/gen_proto.go
@@ -11,6 +11,8 @@ const protoCodeTemplate = `// Generated by github.com/davyxu/protoplus
 // DO NOT EDIT!
 syntax = "proto3";
 
+option go_package= ".;proto";
+
 package {{.PackageName}};
 
 {{range $a, $enumobj := .Enums}}
diff --git a/gen/golang/func.go b/gen/golang/func.go
index eac6b0d..15cbfa1 100644
--- a/gen/golang/func.go
+++ b/gen/golang/func.go
@@ -18,7 +18,7 @@ func init() {
 	UsefulFunc["StructCodec"] = func(d *model.Descriptor) string {
 		codecName := d.TagValueString("Codec")
 		if codecName == "" {
-			return "protoplus"
+			return d.DescriptorSet.Codec
 		}
 
 		return codecName
diff --git a/gen/golang/gen_go.go b/gen/golang/gen_go.go
index 3631318..0b760c1 100644
--- a/gen/golang/gen_go.go
+++ b/gen/golang/gen_go.go
@@ -22,3 +22,19 @@ func GenGo(ctx *gen.Context) error {
 
 	return gen.WriteOutputFile(ctx.OutputFileName).Error()
 }
+
+func GenGoReg(ctx *gen.Context) error {
+
+	gen := codegen.NewCodeGen("goreg").
+		RegisterTemplateFunc(codegen.UsefulFunc).
+		RegisterTemplateFunc(UsefulFunc).
+		ParseTemplate(RegTemplateText, ctx).
+		FormatGoCode()
+
+	if gen.Error() != nil {
+		fmt.Println(string(gen.Code()))
+		return gen.Error()
+	}
+
+	return gen.WriteOutputFile(ctx.OutputFileName).Error()
+}
diff --git a/gen/golang/text.go b/gen/golang/text.go
index 7b19b34..e99b223 100644
--- a/gen/golang/text.go
+++ b/gen/golang/text.go
@@ -137,3 +137,23 @@ func init() {
 }
 
 `
+
+const RegTemplateText = `// Generated by github.com/davyxu/protoplus
+package {{.PackageName}}
+
+import (
+	"github.com/davyxu/cellnet"
+	"github.com/davyxu/cellnet/codec"
+	"reflect"
+)
+
+func init() {
+	{{range .Structs}}
+	cellnet.RegisterMessageMeta(&cellnet.MessageMeta{
+		Codec: codec.MustGetCodec("{{StructCodec .}}"),	
+		Type:  reflect.TypeOf((*{{.Name}})(nil)).Elem(),
+		ID:    {{StructMsgID .}},
+		New:  func() interface{} { return &{{.Name}}{} },
+	}) {{end}}
+}
+`
diff --git a/model/descriptorset.go b/model/descriptorset.go
index bc9db8f..96dcf37 100644
--- a/model/descriptorset.go
+++ b/model/descriptorset.go
@@ -3,6 +3,7 @@ package model
 type DescriptorSet struct {
 	Objects     []*Descriptor `json:",omitempty"`
 	PackageName string
+	Codec       string
 }
 
 func (self *DescriptorSet) Services() (ret []*Descriptor) {