Struct middleware

ratelimit/ratelimit.go:19–30

middleware implements [proxy.Middleware] with rate limiting functionality.

// middleware implements [proxy.Middleware] with rate limiting functionality.
type middleware struct {
	buckets *gocache.Cache
	logger  *slog.Logger

	// mu protects buckets.
	mu *sync.Mutex

	allowlistAddrs netutil.SliceSubnetSet
	ratelimit      uint
	subnetLenIPv4  uint
	subnetLenIPv6  uint
}

// NewMiddleware returns middleware with rate limiting functionality.  c must be
// valid.