From f27a381fe894eedffd93de25ec18f014ad01a1a2 Mon Sep 17 00:00:00 2001
From: Darien Raymond <admin@v2ray.com>
Date: Wed, 8 Aug 2018 10:22:59 +0200
Subject: [PATCH] restrict multi-writer to syscall.conn only

---
 common/buf/io.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/common/buf/io.go b/common/buf/io.go
index 0b801449..71794b69 100644
--- a/common/buf/io.go
+++ b/common/buf/io.go
@@ -79,6 +79,13 @@ func NewWriter(writer io.Writer) Writer {
 		return mw
 	}
 
+	if _, ok := writer.(syscall.Conn); !ok {
+		// If the writer doesn't implement syscall.Conn, it is probably not a TCP connection.
+		return &SequentialWriter{
+			Writer: writer,
+		}
+	}
+
 	return &BufferToBytesWriter{
 		Writer: writer,
 	}