From f18d5b2efeb728ce79027890ef08307f2f41f787 Mon Sep 17 00:00:00 2001
From: Joseph Henry <josephjah@gmail.com>
Date: Mon, 27 Nov 2017 14:23:55 -0800
Subject: [PATCH] Attempted fix for github issue #597, leaking sockets. Added
 call to closenatpmp() after failure to init

---
 osdep/PortMapper.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/osdep/PortMapper.cpp b/osdep/PortMapper.cpp
index 825972b00..9aeeb8d6f 100644
--- a/osdep/PortMapper.cpp
+++ b/osdep/PortMapper.cpp
@@ -123,6 +123,7 @@ public:
 
 					if (initnatpmp(&natpmp,0,0) != 0) {
 						mode = 1;
+						closenatpmp(&natpmp);
 #ifdef ZT_PORTMAPPER_TRACE
                         PM_TRACE("PortMapper: NAT-PMP: init failed, switching to UPnP mode" ZT_EOL_S);
 #endif