revert merge

interface.cpp

@@ -509,10 +509,6 @@ QStringList Interface::list() {
     return QStringList();
   }
 
-  // fixes libnl "issue": https://github.com/tgraf/libnl/issues/49
-  // the cache is apparently global to the kernel and must be resynced if a hotplug device goes away and comes back
-  nl_cache_resync(sock, link_cache, NULL, NULL);
-
   int index = 1;
 
   forever {
@@ -534,6 +530,17 @@ QStringList Interface::list() {
   nl_cache_free(link_cache);
   nl_socket_free(sock);
 
+  // workaround for libnl issue: https://github.com/tgraf/libnl/issues/49
+  // find any interfaces libnl doesn't know about (e.g. USB wireless adapters after they're been unplugged and replugged)
+  QDir dir("/sys/class/net");
+  QStringList interfaces = dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot);
+
+  foreach(QString interface, interfaces) {
+    if(!linkList.contains(interface)) {
+      linkList << interface;
+    }
+  }
+
   return linkList;
 }