OpenVPN
gremlin.h
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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) 2002-2024 OpenVPN 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 along
20  * with this program; if not, write to the Free Software Foundation, Inc.,
21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22  */
23 
24 #ifndef GREMLIN_H
25 #define GREMLIN_H
26 
27 #ifdef ENABLE_DEBUG
28 
29 /*
30  * Gremlin options, presented as bitmask argument to --gremlin directive
31  */
32 
33 #define GREMLIN_CONNECTION_FLOOD_SHIFT (0)
34 #define GREMLIN_CONNECTION_FLOOD_MASK (0x07)
35 
36 #define GREMLIN_PACKET_FLOOD_SHIFT (3)
37 #define GREMLIN_PACKET_FLOOD_MASK (0x03)
38 
39 #define GREMLIN_CORRUPT_SHIFT (5)
40 #define GREMLIN_CORRUPT_MASK (0x03)
41 
42 #define GREMLIN_UP_DOWN_SHIFT (7)
43 #define GREMLIN_UP_DOWN_MASK (0x03)
44 
45 /* 512:1/500 1024:1/100 1536:1/50 */
46 
47 #define GREMLIN_DROP_SHIFT (9)
48 #define GREMLIN_DROP_MASK (0x03)
49 
50 /* extract gremlin parms */
51 
52 #define GREMLIN_CONNECTION_FLOOD_LEVEL(x) (((x)>>GREMLIN_CONNECTION_FLOOD_SHIFT) & GREMLIN_CONNECTION_FLOOD_MASK)
53 #define GREMLIN_PACKET_FLOOD_LEVEL(x) (((x)>>GREMLIN_PACKET_FLOOD_SHIFT) & GREMLIN_PACKET_FLOOD_MASK)
54 #define GREMLIN_CORRUPT_LEVEL(x) (((x)>>GREMLIN_CORRUPT_SHIFT) & GREMLIN_CORRUPT_MASK)
55 #define GREMLIN_UP_DOWN_LEVEL(x) (((x)>>GREMLIN_UP_DOWN_SHIFT) & GREMLIN_UP_DOWN_MASK)
56 #define GREMLIN_DROP_LEVEL(x) (((x)>>GREMLIN_DROP_SHIFT) & GREMLIN_DROP_MASK)
57 
58 #include "buffer.h"
59 
60 struct packet_flood_parms
61 {
62  int n_packets;
63  int packet_size;
64 };
65 
66 bool ask_gremlin(int flags);
67 
68 void corrupt_gremlin(struct buffer *buf, int flags);
69 
70 struct packet_flood_parms get_packet_flood_parms(int level);
71 
72 #endif /* ifdef ENABLE_DEBUG */
73 #endif /* ifndef GREMLIN_H */
buffer
Wrapper structure for dynamically allocated memory.
Definition: buffer.h:60
buffer.h
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