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/*
* 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) 2002-2017 OpenVPN Technologies, 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 */
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