From 4135e6978ae74bdc398899437f682bdf9eac8039 Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Mon, 16 Jan 2023 12:28:30 +0800
Subject: [PATCH] fix: add ReaderReplaceable to BufferedConn, avoid buffered
 data lost

---
 common/net/bufconn.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/common/net/bufconn.go b/common/net/bufconn.go
index 9f1dda2b..ba0ca026 100644
--- a/common/net/bufconn.go
+++ b/common/net/bufconn.go
@@ -58,3 +58,10 @@ func (c *BufferedConn) ReadBuffer(buffer *buf.Buffer) (err error) {
 func (c *BufferedConn) Upstream() any {
 	return c.ExtendedConn
 }
+
+func (c *BufferedConn) ReaderReplaceable() bool {
+	if c.r.Buffered() > 0 {
+		return false
+	}
+	return true
+}