add rate limiter

registry/limiter.go

@@ -0,0 +1,48 @@
+package registry
+
+import (
+	"github.com/go-gost/core/limiter"
+)
+
+type rlimiterRegistry struct {
+	registry
+}
+
+func (r *rlimiterRegistry) Register(name string, v limiter.RateLimiter) error {
+	return r.registry.Register(name, v)
+}
+
+func (r *rlimiterRegistry) Get(name string) limiter.RateLimiter {
+	if name != "" {
+		return &rlimiterWrapper{name: name, r: r}
+	}
+	return nil
+}
+
+func (r *rlimiterRegistry) get(name string) limiter.RateLimiter {
+	if v := r.registry.Get(name); v != nil {
+		return v.(limiter.RateLimiter)
+	}
+	return nil
+}
+
+type rlimiterWrapper struct {
+	name string
+	r    *rlimiterRegistry
+}
+
+func (w *rlimiterWrapper) Input() limiter.Limiter {
+	v := w.r.get(w.name)
+	if v == nil {
+		return nil
+	}
+	return v.Input()
+}
+
+func (w *rlimiterWrapper) Output() limiter.Limiter {
+	v := w.r.get(w.name)
+	if v == nil {
+		return nil
+	}
+	return v.Output()
+}

registry/registry.go

@@ -10,6 +10,7 @@ import (
 	"github.com/go-gost/core/bypass"
 	"github.com/go-gost/core/chain"
 	"github.com/go-gost/core/hosts"
+	"github.com/go-gost/core/limiter"
 	"github.com/go-gost/core/recorder"
 	"github.com/go-gost/core/resolver"
 	"github.com/go-gost/core/service"
@@ -33,6 +34,7 @@ var (
 	resolverReg  Registry[resolver.Resolver]   = &resolverRegistry{}
 	hostsReg     Registry[hosts.HostMapper]    = &hostsRegistry{}
 	recorderReg  Registry[recorder.Recorder]   = &recorderRegistry{}
+	rlimiterReg  Registry[limiter.RateLimiter] = &rlimiterRegistry{}
 )
 
 type Registry[T any] interface {
@@ -126,3 +128,7 @@ func HostsRegistry() Registry[hosts.HostMapper] {
 func RecorderRegistry() Registry[recorder.Recorder] {
 	return recorderReg
 }
+
+func RateLimiterRegistry() Registry[limiter.RateLimiter] {
+	return rlimiterReg
+}