From 5db5780d914199ad3c2a1662e7f02328ea86021a Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Tue, 13 Apr 2021 23:34:24 +0800
Subject: [PATCH] Fix: grpc implementation SetDeadline for udp issue

---
 component/gun/gun.go | 53 ++++++++++++++++++++++++++------------------
 1 file changed, 31 insertions(+), 22 deletions(-)

diff --git a/component/gun/gun.go b/component/gun/gun.go
index 6136235d..9c673932 100644
--- a/component/gun/gun.go
+++ b/component/gun/gun.go
@@ -35,15 +35,18 @@ var (
 type DialFn = func(network, addr string) (net.Conn, error)
 
 type Conn struct {
-	response *http.Response
-	request  *http.Request
-	client   *http.Client
-	writer   *io.PipeWriter
-	once     sync.Once
-	close    *atomic.Bool
-	err      error
-	remain   int
-	br       *bufio.Reader
+	response  *http.Response
+	request   *http.Request
+	transport *http2.Transport
+	writer    *io.PipeWriter
+	once      sync.Once
+	close     *atomic.Bool
+	err       error
+	remain    int
+	br        *bufio.Reader
+
+	// deadlines
+	deadline *time.Timer
 }
 
 type Config struct {
@@ -52,7 +55,7 @@ type Config struct {
 }
 
 func (g *Conn) initRequest() {
-	response, err := g.client.Do(g.request)
+	response, err := g.transport.RoundTrip(g.request)
 	if err != nil {
 		g.err = err
 		g.writer.Close()
@@ -174,9 +177,20 @@ func (g *Conn) Close() error {
 
 func (g *Conn) LocalAddr() net.Addr                { return &net.TCPAddr{IP: net.IPv4zero, Port: 0} }
 func (g *Conn) RemoteAddr() net.Addr               { return &net.TCPAddr{IP: net.IPv4zero, Port: 0} }
-func (g *Conn) SetDeadline(t time.Time) error      { return nil }
-func (g *Conn) SetReadDeadline(t time.Time) error  { return nil }
-func (g *Conn) SetWriteDeadline(t time.Time) error { return nil }
+func (g *Conn) SetReadDeadline(t time.Time) error  { return g.SetDeadline(t) }
+func (g *Conn) SetWriteDeadline(t time.Time) error { return g.SetDeadline(t) }
+
+func (g *Conn) SetDeadline(t time.Time) error {
+	d := time.Until(t)
+	if g.deadline != nil {
+		g.deadline.Reset(d)
+		return nil
+	}
+	g.deadline = time.AfterFunc(d, func() {
+		g.Close()
+	})
+	return nil
+}
 
 func NewHTTP2Client(dialFn DialFn, tlsConfig *tls.Config) *http2.Transport {
 	dialFunc := func(network, addr string, cfg *tls.Config) (net.Conn, error) {
@@ -203,7 +217,6 @@ func NewHTTP2Client(dialFn DialFn, tlsConfig *tls.Config) *http2.Transport {
 		TLSClientConfig:    tlsConfig,
 		AllowHTTP:          false,
 		DisableCompression: true,
-		ReadIdleTimeout:    0,
 		PingTimeout:        0,
 	}
 }
@@ -214,10 +227,6 @@ func StreamGunWithTransport(transport *http2.Transport, cfg *Config) (net.Conn,
 		serviceName = cfg.ServiceName
 	}
 
-	client := &http.Client{
-		Transport: transport,
-	}
-
 	reader, writer := io.Pipe()
 	request := &http.Request{
 		Method: http.MethodPost,
@@ -234,10 +243,10 @@ func StreamGunWithTransport(transport *http2.Transport, cfg *Config) (net.Conn,
 	}
 
 	conn := &Conn{
-		request: request,
-		client:  client,
-		writer:  writer,
-		close:   atomic.NewBool(false),
+		request:   request,
+		transport: transport,
+		writer:    writer,
+		close:     atomic.NewBool(false),
 	}
 
 	go conn.once.Do(conn.initRequest)