VNC: Make 'auth' key mandatory

There is no reason to have it as optional and the code
in the server and client gets slightly simpler if the
key is mandatory.

While there also do some cleanup on how the server info is
collected.
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

vnc.c

@@ -122,7 +122,7 @@ static int put_addr_qdict(QDict *qdict, struct sockaddr_storage *sa,
     return 0;
 }
 
-static int vnc_qdict_local_addr(QDict *qdict, int fd)
+static int vnc_server_addr_put(QDict *qdict, int fd)
 {
     struct sockaddr_storage sa;
     socklen_t salen;
@@ -199,6 +199,16 @@ static const char *vnc_auth_name(VncDisplay *vd) {
     return "unknown";
 }
 
+static int vnc_server_info_put(QDict *qdict)
+{
+    if (vnc_server_addr_put(qdict, vnc_display->lsock) < 0) {
+        return -1;
+    }
+
+    qdict_put(qdict, "auth", qstring_from_str(vnc_auth_name(vnc_display)));
+    return 0;
+}
+
 static QDict *do_info_vnc_client(Monitor *mon, VncState *client)
 {
     QDict *qdict;
@@ -263,8 +273,7 @@ void do_info_vnc_print(Monitor *mon, const QObject *data)
     monitor_printf(mon, "     address: %s:%s\n",
                    qdict_get_str(server, "host"),
                    qdict_get_str(server, "service"));
-    monitor_printf(mon, "        auth: %s\n",
-        qdict_haskey(server, "auth") ? qdict_get_str(server, "auth") : "none");
+    monitor_printf(mon, "        auth: %s\n", qdict_get_str(server, "auth"));
 
     clients = qdict_get_qlist(server, "clients");
     if (qlist_empty(clients)) {
@@ -285,7 +294,7 @@ void do_info_vnc_print(Monitor *mon, const QObject *data)
  * - "enabled": true or false
  * - "host": server's IP address
  * - "service": server's port number
- * - "auth": authentication method (optional)
+ * - "auth": authentication method
  * - "clients": a QList of all connected clients
  *
  * Clients are described by a QDict, with the following information:
@@ -323,14 +332,7 @@ void do_info_vnc(Monitor *mon, QObject **ret_data)
                                        QOBJECT(clist));
         assert(*ret_data != NULL);
 
-        qdict = qobject_to_qdict(*ret_data);
-
-        if (vnc_display->auth != VNC_AUTH_NONE) {
-            qdict_put(qdict, "auth",
-                      qstring_from_str(vnc_auth_name(vnc_display)));
-        }
-
-        if (vnc_qdict_local_addr(qdict, vnc_display->lsock) < 0) {
+        if (vnc_server_info_put(qobject_to_qdict(*ret_data)) < 0) {
             qobject_decref(*ret_data);
             *ret_data = NULL;
         }