1 files changed, 58 insertions, 19 deletions

diff --git a/pkg/server/hook/hook.go b/pkg/server/hook/hook.go
index 69aa237..36b01d4 100644
--- a/pkg/server/hook/hook.go
+++ b/pkg/server/hook/hook.go
@@ -3,16 +3,16 @@ package hook
 import (
 	"fmt"
 	"log"
+	"reflect"
 	"sort"
 	"strings"
+
 	"tunnel/pkg/server/env"
 	"tunnel/pkg/server/opts"
 	"tunnel/pkg/server/queue"
 )
 
-type hookInitFunc func(opts.Opts) (hook, error)
-
-var hooks = map[string]hookInitFunc{}
+var hooks = map[string]interface{}{}
 
 type Pipe struct {
 	priv interface{}
@@ -21,13 +21,12 @@ type Pipe struct {
 	Recv Func
 }
 
-type hook interface {
-	Open(env env.Env) (interface{}, error)
+type Hooker interface {
+	New(env env.Env) (interface{}, error)
 }
 
 type H interface {
-	Open(env env.Env) (*Pipe, error)
-	String() string
+	New(env env.Env) (*Pipe, error)
 }
 
 type Sender interface {
@@ -44,12 +43,12 @@ func (f Func) Send(rq, wq queue.Q) error {
 	return f(rq, wq)
 }
 
-func (f Func) Open(env env.Env) (interface{}, error) {
+func (f Func) New(env env.Env) (interface{}, error) {
 	return f, nil
 }
 
 type wrapper struct {
-	hook
+	hook    Hooker
 	name    string
 	reverse bool
 }
@@ -58,8 +57,8 @@ func (w *wrapper) String() string {
 	return fmt.Sprintf("hook:%s", w.name)
 }
 
-func (w *wrapper) Open(env env.Env) (*Pipe, error) {
-	it, err := w.hook.Open(env)
+func (w *wrapper) New(env env.Env) (*Pipe, error) {
+	it, err := w.hook.New(env)
 	if err != nil {
 		return nil, err
 	}
@@ -87,6 +86,23 @@ func (p *Pipe) Close() {
 	}
 }
 
+func initHook(i interface{}, opts opts.Opts) (Hooker, error) {
+	if f, ok := i.(Func); ok {
+		return f, nil
+	}
+
+	if p, ok := i.(pipeHolder); ok {
+		return p, nil
+	}
+
+	h := reflect.New(reflect.TypeOf(i)).Interface()
+	if err := opts.Configure(h); err != nil {
+		return nil, err
+	}
+
+	return h.(Hooker), nil
+}
+
 func New(desc string) (H, error) {
 	name, opts := opts.Parse(desc)
 	reverse := false
@@ -96,9 +112,9 @@ func New(desc string) (H, error) {
 		reverse = true
 	}
 
-	if f, ok := hooks[name]; !ok {
+	if i, ok := hooks[name]; !ok {
 		return nil, fmt.Errorf("unknown hook '%s'", name)
-	} else if h, err := f(opts); err != nil {
+	} else if h, err := initHook(i, opts); err != nil {
 		return nil, fmt.Errorf("%s: %w", name, err)
 	} else {
 		w := &wrapper{
@@ -110,18 +126,41 @@ func New(desc string) (H, error) {
 	}
 }
 
-func register(name string, f hookInitFunc) {
+func register(name string, i interface{}) {
+	switch t := reflect.TypeOf(i); t.Kind() {
+	case reflect.Struct:
+		if _, ok := reflect.New(t).Interface().(Hooker); !ok {
+			log.Panicf("uncompatible hook type '%s'", t.String())
+		}
+	case reflect.Func:
+		if _, ok := i.(Func); !ok {
+			log.Panicf("uncompatible func type '%s'", t.String())
+		}
+	default:
+		log.Panicf("non-struct and non-func type '%s'", t.String())
+	}
+
 	if _, ok := hooks[name]; ok {
 		log.Panicf("duplicate hook name '%s'", name)
 	}
 
-	hooks[name] = f
+	hooks[name] = i
 }
 
-func registerFunc(name string, p Func) {
-	register(name, func(opts.Opts) (hook, error) {
-		return p, nil
-	})
+func registerFunc(name string, f Func) {
+	register(name, f)
+}
+
+type pipeHolder struct {
+	i interface{}
+}
+
+func (p pipeHolder) New(env.Env) (interface{}, error) {
+	return p.i, nil
+}
+
+func registerPipe(name string, i interface{}) {
+	register(name, pipeHolder{i})
 }
 
 func GetList() []string {