use the new HTTP/3 client API

client.go

@@ -34,10 +34,10 @@ type Client struct {
 	// QUICConfig is the QUIC config used when dialing the QUIC connection.
 	QUICConfig *quic.Config
 
-	dialOnce sync.Once
-	dialErr  error
-	conn     quic.Connection
-	rt       *http3.SingleDestinationRoundTripper
+	dialOnce   sync.Once
+	dialErr    error
+	conn       quic.Connection
+	clientConn *http3.ClientConn
 }
 
 // DialAddr dials a proxied connection to a target server.
@@ -104,31 +104,28 @@ func (c *Client) dial(ctx context.Context, expandedTemplate string) (net.PacketC
 			return
 		}
 		c.conn = conn
-		c.rt = &http3.SingleDestinationRoundTripper{
-			Connection:      conn,
-			EnableDatagrams: true,
-		}
+		tr := &http3.Transport{EnableDatagrams: true}
+		c.clientConn = tr.NewClientConn(conn)
 	})
 	if c.dialErr != nil {
 		return nil, nil, c.dialErr
 	}
-	conn := c.rt.Start()
 	select {
 	case <-ctx.Done():
 		return nil, nil, context.Cause(ctx)
-	case <-conn.Context().Done():
-		return nil, nil, context.Cause(conn.Context())
-	case <-conn.ReceivedSettings():
+	case <-c.clientConn.Context().Done():
+		return nil, nil, context.Cause(c.clientConn.Context())
+	case <-c.clientConn.ReceivedSettings():
 	}
-	settings := conn.Settings()
+	settings := c.clientConn.Settings()
 	if !settings.EnableExtendedConnect {
 		return nil, nil, errors.New("masque: server didn't enable Extended CONNECT")
 	}
 	if !settings.EnableDatagrams {
 		return nil, nil, errors.New("masque: server didn't enable Datagrams")
 	}
 
-	rstr, err := c.rt.OpenRequestStream(ctx)
+	rstr, err := c.clientConn.OpenRequestStream(ctx)
 	if err != nil {
 		return nil, nil, fmt.Errorf("masque: failed to open request stream: %w", err)
 	}
@@ -149,7 +146,7 @@ func (c *Client) dial(ctx context.Context, expandedTemplate string) (net.PacketC
 	if rsp.StatusCode < 200 || rsp.StatusCode > 299 {
 		return nil, rsp, fmt.Errorf("masque: server responded with %d", rsp.StatusCode)
 	}
-	return newProxiedConn(rstr, conn.LocalAddr()), rsp, nil
+	return newProxiedConn(rstr, c.conn.LocalAddr()), rsp, nil
 }
 
 // Close closes the connection to the proxy.

go.mod

@@ -4,7 +4,7 @@ go 1.22
 
 require (
 	github.com/dunglas/httpsfv v1.0.2
-	github.com/quic-go/quic-go v0.47.0
+	github.com/quic-go/quic-go v0.47.1-0.20241013030513-771b20876385
 	github.com/stretchr/testify v1.9.0
 	github.com/yosida95/uritemplate/v3 v3.0.2
 	go.uber.org/goleak v1.3.0

go.sum

@@ -31,8 +31,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI=
 github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1ZgaEg=
-github.com/quic-go/quic-go v0.47.0 h1:yXs3v7r2bm1wmPTYNLKAAJTHMYkPEsfYJmTazXrCZ7Y=
-github.com/quic-go/quic-go v0.47.0/go.mod h1:3bCapYsJvXGZcipOHuu7plYtaV6tnF+z7wIFsU0WK9E=
+github.com/quic-go/quic-go v0.47.1-0.20241013030513-771b20876385 h1:nRtcAJNKkLp6qaEtrrqvisV8c+qsfpvfZhxlnkgAS6U=
+github.com/quic-go/quic-go v0.47.1-0.20241013030513-771b20876385/go.mod h1:yBgs3rWBOADpga7F+jJsb6Ybg1LSYiQvwWlLX+/6HMs=
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=