release/src/router/openvpn/gremlin.h

   1 /*
   2  *  OpenVPN -- An application to securely tunnel IP networks
   3  *             over a single UDP port, with support for SSL/TLS-based
   4  *             session authentication and key exchange,
   5  *             packet encryption, packet authentication, and
   6  *             packet compression.
   7  *
   8  *  Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2
  12  *  as published by the Free Software Foundation.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program (see the file COPYING included with this
  21  *  distribution); if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #ifndef GREMLIN_H
  26 #define GREMLIN_H
  27
  28 #ifdef ENABLE_DEBUG
  29
  30 /*
  31  * Gremlin options, presented as bitmask argument to --gremlin directive
  32  */
  33
  34 #define GREMLIN_CONNECTION_FLOOD_SHIFT   (0)
  35 #define GREMLIN_CONNECTION_FLOOD_MASK    (0x07)
  36
  37 #define GREMLIN_PACKET_FLOOD_SHIFT       (3)
  38 #define GREMLIN_PACKET_FLOOD_MASK        (0x03)
  39
  40 #define GREMLIN_CORRUPT_SHIFT            (5)
  41 #define GREMLIN_CORRUPT_MASK             (0x03)
  42
  43 #define GREMLIN_UP_DOWN_SHIFT            (7)
  44 #define GREMLIN_UP_DOWN_MASK             (0x03)
  45
  46 /* 512:1/500 1024:1/100 1536:1/50 */
  47
  48 #define GREMLIN_DROP_SHIFT               (9)
  49 #define GREMLIN_DROP_MASK                (0x03)
  50
  51 /* extract gremlin parms */
  52
  53 #define GREMLIN_CONNECTION_FLOOD_LEVEL(x) (((x)>>GREMLIN_CONNECTION_FLOOD_SHIFT) & GREMLIN_CONNECTION_FLOOD_MASK)
  54 #define GREMLIN_PACKET_FLOOD_LEVEL(x)     (((x)>>GREMLIN_PACKET_FLOOD_SHIFT)     & GREMLIN_PACKET_FLOOD_MASK)
  55 #define GREMLIN_CORRUPT_LEVEL(x)          (((x)>>GREMLIN_CORRUPT_SHIFT)          & GREMLIN_CORRUPT_MASK)
  56 #define GREMLIN_UP_DOWN_LEVEL(x)          (((x)>>GREMLIN_UP_DOWN_SHIFT)          & GREMLIN_UP_DOWN_MASK)
  57 #define GREMLIN_DROP_LEVEL(x)             (((x)>>GREMLIN_DROP_SHIFT)             & GREMLIN_DROP_MASK)
  58
  59 #include "buffer.h"
  60
  61 struct packet_flood_parms
  62 {
  63   int n_packets;
  64   int packet_size;
  65 };
  66
  67 bool ask_gremlin (int flags);
  68 void corrupt_gremlin (struct buffer* buf, int flags);
  69 struct packet_flood_parms get_packet_flood_parms (int level);
  70
  71 #endif
  72 #endif