add traffic limiter for relay bind

handler/relay/metadata.go

@@ -4,7 +4,6 @@ import (
 	"crypto"
 	"crypto/tls"
 	"crypto/x509"
-	"math"
 	"time"
 
 	"github.com/go-gost/core/bypass"
@@ -15,12 +14,11 @@ import (
 )
 
 type metadata struct {
-	readTimeout            time.Duration
-	enableBind             bool
-	udpBufferSize          int
-	noDelay                bool
-	hash                   string
-	muxCfg                 *mux.Config
+	readTimeout time.Duration
+	enableBind  bool
+	noDelay     bool
+	hash        string
+	muxCfg      *mux.Config
 
 	observerPeriod       time.Duration
 	observerResetTraffic bool
@@ -47,13 +45,6 @@ func (h *relayHandler) parseMetadata(md mdata.Metadata) (err error) {
 
 	h.md.enableBind = mdutil.GetBool(md, "bind")
 	h.md.noDelay = mdutil.GetBool(md, "nodelay")
-
-	if bs := mdutil.GetInt(md, "udpBufferSize"); bs > 0 {
-		h.md.udpBufferSize = int(math.Min(math.Max(float64(bs), 512), 64*1024))
-	} else {
-		h.md.udpBufferSize = 4096
-	}
-
 	h.md.hash = mdutil.GetString(md, "hash")
 
 	h.md.muxCfg = &mux.Config{