From 4fb01ce0ba7e581963e5e06ff69038ca37635a79 Mon Sep 17 00:00:00 2001
From: james <james@e7ae566f-a301-0410-adde-c780ea21d3b5>
Date: Wed, 16 Jul 2008 22:37:09 +0000
Subject: [PATCH] In the Windows version of tun_finalize, on errors that would
 return -1, set buf->len to 0 rather than -1.  While downstream code is set up
 to consider the buffer invalidated if its length is <= 0, this change makes
 the code cleaner and safer.

git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@3061 e7ae566f-a301-0410-adde-c780ea21d3b5
---
 tun.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tun.c b/tun.c
index c1494d954..bc3466bd4 100644
--- a/tun.c
+++ b/tun.c
@@ -2033,7 +2033,12 @@ tun_finalize (
     }
 
   if (buf)
-    buf->len = ret;
+    {
+      if (ret < 0)
+	buf->len = 0;
+      else
+	buf->len = ret;
+    }
   return ret;
 }
 
-- 
2.47.2