From bc7e9366334b46f8f89f8fedf732ee7d68421604 Mon Sep 17 00:00:00 2001
From: pzm <pzm@google.com>
Date: Mon, 2 Nov 2015 18:40:09 -0800
Subject: [PATCH] Support multiple call to Conn.Close().

---
 conn.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/conn.go b/conn.go
index a1437d7..7815039 100644
--- a/conn.go
+++ b/conn.go
@@ -57,8 +57,12 @@ func NewClientConn(ctx *Context, conn net.Conn) (*Conn, error) {
 	return sslConn, nil
 }
 func (self *Conn) Close() error {
-	return self.ssl.Shutdown()
-
+	if self.ssl != nil {
+		err := self.ssl.Shutdown()
+		self.ssl = nil
+		return err
+	}
+	return nil
 }
 func (self *Conn) LocalAddr() net.Addr {
 	return self.conn.LocalAddr()
-- 
2.6.0.rc2.230.g3dd15c0