Update buffer usage

go.mod

@@ -26,7 +26,7 @@ require (
 	github.com/sagernet/gvisor v0.0.0-20231119034329-07cfb6aaf930
 	github.com/sagernet/quic-go v0.40.0
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
-	github.com/sagernet/sing v0.2.20
+	github.com/sagernet/sing v0.3.0-rc.4
 	github.com/sagernet/sing-dns v0.1.12
 	github.com/sagernet/sing-mux v0.1.7
 	github.com/sagernet/sing-quic v0.1.6

go.sum

@@ -110,8 +110,10 @@ github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 h1:5Th31OC6yj8byL
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691/go.mod h1:B8lp4WkQ1PwNnrVMM6KyuFR20pU8jYBD+A4EhJovEXU=
 github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
 github.com/sagernet/sing v0.1.8/go.mod h1:jt1w2u7lJQFFSGLiRrRIs5YWmx4kAPfWuOejuDW9qMk=
-github.com/sagernet/sing v0.2.20 h1:ckcCB/5xu8G8wElNeH74IF6Soac5xWN+eQUXRuonjPQ=
-github.com/sagernet/sing v0.2.20/go.mod h1:Ce5LNojQOgOiWhiD8pPD6E9H7e2KgtOe3Zxx4Ou5u80=
+github.com/sagernet/sing v0.3.0-rc.1 h1:XcdCC9CcLNfMSlObIQPjxyzenGQT2R1sGLHvdwDmQFU=
+github.com/sagernet/sing v0.3.0-rc.1/go.mod h1:Ce5LNojQOgOiWhiD8pPD6E9H7e2KgtOe3Zxx4Ou5u80=
+github.com/sagernet/sing v0.3.0-rc.4 h1:1Til9jN0AnTPB9iiX/MbFrocbRCOXDsdZ/io1IjVWkg=
+github.com/sagernet/sing v0.3.0-rc.4/go.mod h1:Ce5LNojQOgOiWhiD8pPD6E9H7e2KgtOe3Zxx4Ou5u80=
 github.com/sagernet/sing-dns v0.1.12 h1:1HqZ+ln+Rezx/aJMStaS0d7oPeX2EobSV1NT537kyj4=
 github.com/sagernet/sing-dns v0.1.12/go.mod h1:rx/DTOisneQpCgNQ4jbFU/JNEtnz0lYcHXenlVzpjEU=
 github.com/sagernet/sing-mux v0.1.7 h1:+48spVReBwIrv6ZdUujiRFCCnblZFwxmbPgrs5zezlI=

outbound/dns.go

@@ -165,6 +165,7 @@ func (d *DNS) NewPacketConnection(ctx context.Context, conn N.PacketConn, metada
 				}
 				timeout.Update()
 				responseBuffer := buf.NewPacket()
+				responseBuffer.Resize(1024, 0)
 				n, err := response.PackBuffer(responseBuffer.FreeBytes())
 				if err != nil {
 					cancel(err)
@@ -194,9 +195,7 @@ func (d *DNS) newPacketConnection(ctx context.Context, conn N.PacketConn, readWa
 	group.Append0(func(ctx context.Context) error {
 		var buffer *buf.Buffer
 		readWaiter.InitializeReadWaiter(func() *buf.Buffer {
-			buffer = buf.NewSize(dns.FixedPacketSize)
-			buffer.FullReset()
-			return buffer
+			return buf.NewSize(dns.FixedPacketSize)
 		})
 		defer readWaiter.InitializeReadWaiter(nil)
 		for {
@@ -243,6 +242,7 @@ func (d *DNS) newPacketConnection(ctx context.Context, conn N.PacketConn, readWa
 				}
 				timeout.Update()
 				responseBuffer := buf.NewPacket()
+				responseBuffer.Resize(1024, 0)
 				n, err := response.PackBuffer(responseBuffer.FreeBytes())
 				if err != nil {
 					cancel(err)

route/router.go

@@ -652,7 +652,6 @@ func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata ad
 
 	if metadata.InboundOptions.SniffEnabled {
 		buffer := buf.NewPacket()
-		buffer.FullReset()
 		sniffMetadata, err := sniff.PeekStream(ctx, conn, buffer, time.Duration(metadata.InboundOptions.SniffTimeout), sniff.StreamDomainNameQuery, sniff.TLSClientHello, sniff.HTTPHost)
 		if sniffMetadata != nil {
 			metadata.Protocol = sniffMetadata.Protocol
@@ -768,7 +767,6 @@ func (r *Router) RoutePacketConnection(ctx context.Context, conn N.PacketConn, m
 
 	if metadata.InboundOptions.SniffEnabled || metadata.Destination.Addr.IsUnspecified() {
 		buffer := buf.NewPacket()
-		buffer.FullReset()
 		destination, err := conn.ReadPacket(buffer)
 		if err != nil {
 			buffer.Release()

transport/vless/vision.go

@@ -134,7 +134,7 @@ func (c *VisionConn) Read(p []byte) (n int, err error) {
 			buffers = common.Map(buffers, func(it *buf.Buffer) *buf.Buffer {
 				return it.ToOwned()
 			})
-			chunkBuffer.FullReset()
+			chunkBuffer.Reset()
 		}
 		if c.remainingContent == 0 && c.remainingPadding == 0 {
 			if c.currentCommand == commandPaddingEnd {