From b51d777b733f76844c3a1c72221a76ace460ab26 Mon Sep 17 00:00:00 2001
From: Ondrej Holy <oholy@redhat.com>
Date: Fri, 24 Aug 2018 14:37:11 +0200
Subject: [PATCH 1/3] Prevent monitoring all interfaces after change of other
 props

Commit bfa1432 prevents monitoring all interfaces if invalid interface
is provided, but it works only in some cases, because the invalid
interface is not remebered and for example consequent change of port
will cause that all interfaces are monitored again. Remember the invalid
interface to prevent monitoring all interfaces even after change of
other properties...

https://bugzilla.gnome.org/show_bug.cgi?id=796349
---
 server/libvncserver/sockets.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/server/libvncserver/sockets.c b/server/libvncserver/sockets.c
index 45df6d5..ee755eb 100644
--- a/server/libvncserver/sockets.c
+++ b/server/libvncserver/sockets.c
@@ -748,12 +748,9 @@ rfbSetNetworkInterface(rfbScreenInfoPtr rfbScreen, const char *netIface)
     rfbScreen->rfbListenSockTotal = 0;
   }
 
-  if(netIface != NULL && strlen(netIface) > 0 && if_nametoindex(netIface) > 0) {
-     rfbScreen->netIface = netIface;
-  }
-  else {
-    rfbScreen->netIface = NULL;
-    if(netIface != NULL && strlen(netIface) > 0) {
+  if(netIface != NULL && strlen(netIface) > 0) {
+    rfbScreen->netIface = netIface;
+    if (if_nametoindex(netIface) == 0) {
       rfbLog("(%s) is an invalid network interface\n", netIface);
       return FALSE;
     }
-- 
2.17.1