update limiter

limiter/conn/conn.go

@@ -102,7 +102,7 @@ type connLimiter struct {
 	ipLimits   map[string]ConnLimitGenerator
 	cidrLimits cidranger.Ranger
 	limits     map[string]limiter.Limiter
-	mu         sync.RWMutex
+	mu         sync.Mutex
 	cancelFunc context.CancelFunc
 	options    options
 }

limiter/conn/limiter.go

@@ -20,7 +20,7 @@ func (l *llimiter) Limit() int {
 }
 
 func (l *llimiter) Allow(n int) bool {
-	if atomic.AddInt64(&l.current, int64(n)) >= int64(l.limit) {
+	if atomic.AddInt64(&l.current, int64(n)) > int64(l.limit) {
 		if n > 0 {
 			atomic.AddInt64(&l.current, -int64(n))
 		}