| 1 | /* |
|---|
| 2 | * zzuf - general purpose fuzzer |
|---|
| 3 | * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> |
|---|
| 4 | * All Rights Reserved |
|---|
| 5 | * |
|---|
| 6 | * $Id: libzzuf.h 2272 2008-04-12 07:44:34Z sam $ |
|---|
| 7 | * |
|---|
| 8 | * This program is free software. It comes without any warranty, to |
|---|
| 9 | * the extent permitted by applicable law. You can redistribute it |
|---|
| 10 | * and/or modify it under the terms of the Do What The Fuck You Want |
|---|
| 11 | * To Public License, Version 2, as published by Sam Hocevar. See |
|---|
| 12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
|---|
| 13 | */ |
|---|
| 14 | |
|---|
| 15 | /* |
|---|
| 16 | * libzzuf.h: preloaded wrapper library |
|---|
| 17 | */ |
|---|
| 18 | |
|---|
| 19 | /* We arbitrarily split files into 1024-byte chunks. Each chunk has an |
|---|
| 20 | * associated seed that can be computed from the zzuf seed, the chunk |
|---|
| 21 | * index and the fuzziness density. This allows us to predictably fuzz |
|---|
| 22 | * any part of the file without reading the whole file. */ |
|---|
| 23 | #define CHUNKBYTES 1024 |
|---|
| 24 | |
|---|
| 25 | /* Default seed is 0. Why not? */ |
|---|
| 26 | #define DEFAULT_SEED 0 |
|---|
| 27 | |
|---|
| 28 | /* The default fuzzing ratio is, arbitrarily, 0.4%. The minimal fuzzing |
|---|
| 29 | * ratio is 0.000000001% (less than one bit changed on a whole DVD). */ |
|---|
| 30 | #define DEFAULT_RATIO 0.004 |
|---|
| 31 | #define MIN_RATIO 0.00000000001 |
|---|
| 32 | #define MAX_RATIO 5.0 |
|---|
| 33 | |
|---|
| 34 | struct fuzz |
|---|
| 35 | { |
|---|
| 36 | uint32_t seed; |
|---|
| 37 | double ratio; |
|---|
| 38 | int64_t cur; |
|---|
| 39 | #ifdef HAVE_FGETLN |
|---|
| 40 | char *tmp; |
|---|
| 41 | #endif |
|---|
| 42 | int uflag; int64_t upos; uint8_t uchar; /* ungetc stuff */ |
|---|
| 43 | uint8_t data[CHUNKBYTES]; |
|---|
| 44 | }; |
|---|
| 45 | |
|---|
| 46 | /* Internal variables */ |
|---|
| 47 | extern int _zz_ready; |
|---|
| 48 | extern int _zz_disabled; |
|---|
| 49 | extern int _zz_debugfd; |
|---|
| 50 | extern int _zz_signal; |
|---|
| 51 | extern int _zz_memory; |
|---|
| 52 | extern int _zz_network; |
|---|
| 53 | extern int _zz_autoinc; |
|---|
| 54 | |
|---|
| 55 | /* This function is needed to initialise memory functions */ |
|---|
| 56 | extern void _zz_mem_init(void); |
|---|
| 57 | |
|---|
