flimflam: Add L2TP/IPsec VPN plugin

plugins/vpn.h

 /*
  *
  *  Connection Manager
  *
  *  Copyright (C) 2010  BMW Car IT GmbH. All rights reserved.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */
 
+#define VPN_FLAG_NO_TUN 1
+
 enum vpn_state {
         VPN_STATE_UNKNOWN       = 0,
         VPN_STATE_IDLE          = 1,
         VPN_STATE_CONNECT       = 2,
         VPN_STATE_READY         = 3,
         VPN_STATE_DISCONNECT    = 4,
         VPN_STATE_FAILURE       = 5,
 };
 
 struct vpn_driver {
+        int flags;
         int (*notify) (DBusMessage *msg, struct connman_provider *provider);
         int (*connect) (struct connman_provider *provider,
                         struct connman_task *task, const char *if_name);
         void (*disconnect) (void);
 };
 
 int vpn_register(const char *name, struct vpn_driver *driver,
                         const char *program);
 void vpn_unregister(const char *provider_name);
 void vpn_died();
+int vpn_set_ifname(struct connman_provider *provider, const char *ifname);