TUN-4922: Downgrade quic-go library to 0.20.0

vendor/golang.org/x/net/http2/go111.go

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.11
 // +build go1.11
 
 package http2

vendor/golang.org/x/net/http2/not_go111.go

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build !go1.11
 // +build !go1.11
 
 package http2

vendor/golang.org/x/net/http2/server.go

@@ -1293,9 +1293,7 @@ func (sc *serverConn) startGracefulShutdown() {
 	sc.shutdownOnce.Do(func() { sc.sendServeMsg(gracefulShutdownMsg) })
 }
 
-// After sending GOAWAY with an error code (non-graceful shutdown), the
-// connection will close after goAwayTimeout.
-//
+// After sending GOAWAY, the connection will close after goAwayTimeout.
 // If we close the connection immediately after sending GOAWAY, there may
 // be unsent data in our kernel receive buffer, which will cause the kernel
 // to send a TCP RST on close() instead of a FIN. This RST will abort the
@@ -1631,37 +1629,23 @@ func (sc *serverConn) processSettingInitialWindowSize(val uint32) error {
 
 func (sc *serverConn) processData(f *DataFrame) error {
 	sc.serveG.check()
-	id := f.Header().StreamID
-	if sc.inGoAway && (sc.goAwayCode != ErrCodeNo || id > sc.maxClientStreamID) {
-		// Discard all DATA frames if the GOAWAY is due to an
-		// error, or:
-		//
-		// Section 6.8: After sending a GOAWAY frame, the sender
-		// can discard frames for streams initiated by the
-		// receiver with identifiers higher than the identified
-		// last stream.
+	if sc.inGoAway && sc.goAwayCode != ErrCodeNo {
 		return nil
 	}
-
 	data := f.Data()
+
+	// "If a DATA frame is received whose stream is not in "open"
+	// or "half closed (local)" state, the recipient MUST respond
+	// with a stream error (Section 5.4.2) of type STREAM_CLOSED."
+	id := f.Header().StreamID
 	state, st := sc.state(id)
 	if id == 0 || state == stateIdle {
-		// Section 6.1: "DATA frames MUST be associated with a
-		// stream. If a DATA frame is received whose stream
-		// identifier field is 0x0, the recipient MUST respond
-		// with a connection error (Section 5.4.1) of type
-		// PROTOCOL_ERROR."
-		//
 		// Section 5.1: "Receiving any frame other than HEADERS
 		// or PRIORITY on a stream in this state MUST be
 		// treated as a connection error (Section 5.4.1) of
 		// type PROTOCOL_ERROR."
 		return ConnectionError(ErrCodeProtocol)
 	}
-
-	// "If a DATA frame is received whose stream is not in "open"
-	// or "half closed (local)" state, the recipient MUST respond
-	// with a stream error (Section 5.4.2) of type STREAM_CLOSED."
 	if st == nil || state != stateOpen || st.gotTrailerHeader || st.resetQueued {
 		// This includes sending a RST_STREAM if the stream is
 		// in stateHalfClosedLocal (which currently means that
@@ -1710,7 +1694,6 @@ func (sc *serverConn) processData(f *DataFrame) error {
 		if len(data) > 0 {
 			wrote, err := st.body.Write(data)
 			if err != nil {
-				sc.sendWindowUpdate(nil, int(f.Length)-wrote)
 				return streamError(id, ErrCodeStreamClosed)
 			}
 			if wrote != len(data) {

vendor/golang.org/x/net/http2/transport.go

@@ -154,21 +154,12 @@ func (t *Transport) pingTimeout() time.Duration {
 
 // ConfigureTransport configures a net/http HTTP/1 Transport to use HTTP/2.
 // It returns an error if t1 has already been HTTP/2-enabled.
-//
-// Use ConfigureTransports instead to configure the HTTP/2 Transport.
 func ConfigureTransport(t1 *http.Transport) error {
-	_, err := ConfigureTransports(t1)
+	_, err := configureTransport(t1)
 	return err
 }
 
-// ConfigureTransports configures a net/http HTTP/1 Transport to use HTTP/2.
-// It returns a new HTTP/2 Transport for further configuration.
-// It returns an error if t1 has already been HTTP/2-enabled.
-func ConfigureTransports(t1 *http.Transport) (*Transport, error) {
-	return configureTransports(t1)
-}
-
-func configureTransports(t1 *http.Transport) (*Transport, error) {
+func configureTransport(t1 *http.Transport) (*Transport, error) {
 	connPool := new(clientConnPool)
 	t2 := &Transport{
 		ConnPool: noDialClientConnPool{connPool},
@@ -698,7 +689,6 @@ func (t *Transport) newClientConn(c net.Conn, singleUse bool) (*ClientConn, erro
 	cc.inflow.add(transportDefaultConnFlow + initialWindowSize)
 	cc.bw.Flush()
 	if cc.werr != nil {
-		cc.Close()
 		return nil, cc.werr
 	}
 
@@ -1090,15 +1080,6 @@ func (cc *ClientConn) roundTrip(req *http.Request) (res *http.Response, gotErrAf
 	bodyWriter := cc.t.getBodyWriterState(cs, body)
 	cs.on100 = bodyWriter.on100
 
-	defer func() {
-		cc.wmu.Lock()
-		werr := cc.werr
-		cc.wmu.Unlock()
-		if werr != nil {
-			cc.Close()
-		}
-	}()
-
 	cc.wmu.Lock()
 	endStream := !hasBody && !hasTrailers
 	werr := cc.writeHeaders(cs.ID, endStream, int(cc.maxFrameSize), hdrs)
@@ -1148,9 +1129,6 @@ func (cc *ClientConn) roundTrip(req *http.Request) (res *http.Response, gotErrAf
 			// we can keep it.
 			bodyWriter.cancel()
 			cs.abortRequestBodyWrite(errStopReqBodyWrite)
-			if hasBody && !bodyWritten {
-				<-bodyWriter.resc
-			}
 		}
 		if re.err != nil {
 			cc.forgetStreamID(cs.ID)
@@ -1171,7 +1149,6 @@ func (cc *ClientConn) roundTrip(req *http.Request) (res *http.Response, gotErrAf
 			} else {
 				bodyWriter.cancel()
 				cs.abortRequestBodyWrite(errStopReqBodyWriteAndCancel)
-				<-bodyWriter.resc
 			}
 			cc.forgetStreamID(cs.ID)
 			return nil, cs.getStartedWrite(), errTimeout
@@ -1181,7 +1158,6 @@ func (cc *ClientConn) roundTrip(req *http.Request) (res *http.Response, gotErrAf
 			} else {
 				bodyWriter.cancel()
 				cs.abortRequestBodyWrite(errStopReqBodyWriteAndCancel)
-				<-bodyWriter.resc
 			}
 			cc.forgetStreamID(cs.ID)
 			return nil, cs.getStartedWrite(), ctx.Err()
@@ -1191,7 +1167,6 @@ func (cc *ClientConn) roundTrip(req *http.Request) (res *http.Response, gotErrAf
 			} else {
 				bodyWriter.cancel()
 				cs.abortRequestBodyWrite(errStopReqBodyWriteAndCancel)
-				<-bodyWriter.resc
 			}
 			cc.forgetStreamID(cs.ID)
 			return nil, cs.getStartedWrite(), errRequestCanceled
@@ -1201,7 +1176,6 @@ func (cc *ClientConn) roundTrip(req *http.Request) (res *http.Response, gotErrAf
 			// forgetStreamID.
 			return nil, cs.getStartedWrite(), cs.resetErr
 		case err := <-bodyWriter.resc:
-			bodyWritten = true
 			// Prefer the read loop's response, if available. Issue 16102.
 			select {
 			case re := <-readLoopResCh:
@@ -1212,6 +1186,7 @@ func (cc *ClientConn) roundTrip(req *http.Request) (res *http.Response, gotErrAf
 				cc.forgetStreamID(cs.ID)
 				return nil, cs.getStartedWrite(), err
 			}
+			bodyWritten = true
 			if d := cc.responseHeaderTimeout(); d != 0 {
 				timer := time.NewTimer(d)
 				defer timer.Stop()
@@ -2632,9 +2607,7 @@ func (t *Transport) getBodyWriterState(cs *clientStream, body io.Reader) (s body
 
 func (s bodyWriterState) cancel() {
 	if s.timer != nil {
-		if s.timer.Stop() {
-			s.resc <- nil
-		}
+		s.timer.Stop()
 	}
 }