/*
  *  OpenVPN -- An application to securely tunnel IP networks
  *             over a single UDP port, with support for SSL/TLS-based
  *             session authentication and key exchange,
  *             packet encryption, packet authentication, and
  *             packet compression.
  *

  *  Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>

  *
  *  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 Street, Fifth Floor, Boston, MA 02110-1301 USA.

  */
 
 #ifndef GREMLIN_H
 #define GREMLIN_H
 
 #ifdef ENABLE_DEBUG
 
 /*
  * Gremlin options, presented as bitmask argument to --gremlin directive
  */
 
 #define GREMLIN_CONNECTION_FLOOD_SHIFT   (0)
 #define GREMLIN_CONNECTION_FLOOD_MASK    (0x07)
 
 #define GREMLIN_PACKET_FLOOD_SHIFT       (3)
 #define GREMLIN_PACKET_FLOOD_MASK        (0x03)
 
 #define GREMLIN_CORRUPT_SHIFT            (5)
 #define GREMLIN_CORRUPT_MASK             (0x03)
 
 #define GREMLIN_UP_DOWN_SHIFT            (7)
 #define GREMLIN_UP_DOWN_MASK             (0x03)
 

 /* 512:1/500 1024:1/100 1536:1/50 */
 

 #define GREMLIN_DROP_SHIFT               (9)
 #define GREMLIN_DROP_MASK                (0x03)
 
 /* extract gremlin parms */
 
 #define GREMLIN_CONNECTION_FLOOD_LEVEL(x) (((x)>>GREMLIN_CONNECTION_FLOOD_SHIFT) & GREMLIN_CONNECTION_FLOOD_MASK)
 #define GREMLIN_PACKET_FLOOD_LEVEL(x)     (((x)>>GREMLIN_PACKET_FLOOD_SHIFT)     & GREMLIN_PACKET_FLOOD_MASK)
 #define GREMLIN_CORRUPT_LEVEL(x)          (((x)>>GREMLIN_CORRUPT_SHIFT)          & GREMLIN_CORRUPT_MASK)
 #define GREMLIN_UP_DOWN_LEVEL(x)          (((x)>>GREMLIN_UP_DOWN_SHIFT)          & GREMLIN_UP_DOWN_MASK)
 #define GREMLIN_DROP_LEVEL(x)             (((x)>>GREMLIN_DROP_SHIFT)             & GREMLIN_DROP_MASK)
 
 #include "buffer.h"
 
 struct packet_flood_parms
 {

     int n_packets;
     int packet_size;

 };
 

 bool ask_gremlin(int flags);

 void corrupt_gremlin(struct buffer *buf, int flags);
 
 struct packet_flood_parms get_packet_flood_parms(int level);
 
 #endif /* ifdef ENABLE_DEBUG */
 #endif /* ifndef GREMLIN_H */