1 | /* |
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2 | * zzuf - general purpose fuzzer |
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3 | * Copyright (c) 2006-2010 Sam Hocevar <sam@hocevar.net> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * This program is free software. It comes without any warranty, to |
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7 | * the extent permitted by applicable law. You can redistribute it |
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8 | * and/or modify it under the terms of the Do What The Fuck You Want |
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9 | * To Public License, Version 2, as published by Sam Hocevar. See |
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10 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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11 | */ |
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12 | |
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13 | /* |
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14 | * common.h: default fuzzing settings |
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15 | */ |
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16 | |
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17 | /* We arbitrarily split files into 1024-byte chunks. Each chunk has an |
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18 | * associated seed that can be computed from the zzuf seed, the chunk |
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19 | * index and the fuzziness density. This allows us to predictably fuzz |
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20 | * any part of the file without reading the whole file. */ |
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21 | #define CHUNKBYTES 1024 |
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22 | |
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23 | /* Default seed is 0. Why not? */ |
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24 | #define DEFAULT_SEED 0 |
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25 | |
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26 | /* The default fuzzing ratio is, arbitrarily, 0.4%. The minimal fuzzing |
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27 | * ratio is 0.000000001% (less than one bit changed on a whole DVD). */ |
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28 | #define DEFAULT_RATIO 0.004 |
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29 | #define MIN_RATIO 0.00000000001 |
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30 | #define MAX_RATIO 5.0 |
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31 | |
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32 | /* The default maximum memory usage is 1024 MiB. If this value is not set, |
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33 | * zzuf may bring a machine down to its knees because of I/O. */ |
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34 | #define DEFAULT_MEM 1024 |
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35 | |
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36 | /* We use file descriptor 17 as the debug channel */ |
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37 | #define DEBUG_FILENO 17 |
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38 | #define DEBUG_FILENO_STR "17" |
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39 | |
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40 | struct fuzz |
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41 | { |
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42 | uint32_t seed; |
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43 | double ratio; |
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44 | int64_t cur; |
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45 | #ifdef HAVE_FGETLN |
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46 | char *tmp; |
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47 | #endif |
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48 | int uflag; int64_t upos; uint8_t uchar; /* ungetc stuff */ |
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49 | uint8_t data[CHUNKBYTES]; |
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50 | }; |
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51 | |
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