| 1 | /* |
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| 2 | * zzuf - general purpose fuzzer |
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| 3 | * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> |
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| 4 | * All Rights Reserved |
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| 5 | * |
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| 6 | * $Id: libzzuf.c 1728 2007-02-01 16:08:33Z sam $ |
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| 7 | * |
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| 8 | * This program is free software. It comes without any warranty, to |
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| 9 | * the extent permitted by applicable law. You can redistribute it |
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| 10 | * and/or modify it under the terms of the Do What The Fuck You Want |
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| 11 | * To Public License, Version 2, as published by Sam Hocevar. See |
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| 12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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| 13 | */ |
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| 14 | |
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| 15 | /* |
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| 16 | * libzzuf.c: preloaded wrapper library |
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| 17 | */ |
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| 18 | |
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| 19 | #include "config.h" |
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| 20 | #define _GNU_SOURCE |
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| 21 | |
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| 22 | #if defined HAVE_STDINT_H |
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| 23 | # include <stdint.h> |
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| 24 | #elif defined HAVE_INTTYPES_H |
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| 25 | # include <inttypes.h> |
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| 26 | #endif |
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| 27 | #if defined HAVE_WINDOWS_H |
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| 28 | # include <windows.h> |
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| 29 | #endif |
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| 30 | #include <stdio.h> |
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| 31 | #include <sys/types.h> |
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| 32 | #if defined HAVE_UNISTD_H |
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| 33 | # include <unistd.h> |
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| 34 | #endif |
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| 35 | #include <stdlib.h> |
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| 36 | #include <string.h> |
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| 37 | #include <fcntl.h> |
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| 38 | |
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| 39 | #include <stdarg.h> |
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| 40 | |
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| 41 | #include "libzzuf.h" |
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| 42 | #include "debug.h" |
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| 43 | #include "fd.h" |
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| 44 | #include "sys.h" |
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| 45 | #include "fuzz.h" |
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| 46 | |
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| 47 | /* Library initialisation shit */ |
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| 48 | void _zz_init(void) __attribute__((constructor)); |
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| 49 | void _zz_fini(void) __attribute__((destructor)); |
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| 50 | #if defined HAVE_WINDOWS_H |
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| 51 | BOOL WINAPI DllMain(HINSTANCE, DWORD, PVOID); |
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| 52 | #endif |
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| 53 | |
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| 54 | /* Global variables */ |
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| 55 | int _zz_ready = 0; |
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| 56 | int _zz_debugfd = -1; |
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| 57 | int _zz_signal = 0; |
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| 58 | int _zz_memory = 0; |
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| 59 | int _zz_network = 0; |
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| 60 | |
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| 61 | /* Library initialisation shit */ |
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| 62 | void _zz_init(void) |
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| 63 | { |
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| 64 | char *tmp, *tmp2; |
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| 65 | |
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| 66 | /* We need this as soon as possible */ |
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| 67 | _zz_mem_init(); |
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| 68 | |
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| 69 | tmp = getenv("ZZUF_DEBUG"); |
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| 70 | if(tmp) |
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| 71 | _zz_debugfd = atoi(tmp); |
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| 72 | |
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| 73 | tmp = getenv("ZZUF_SEED"); |
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| 74 | if(tmp && *tmp) |
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| 75 | _zz_setseed(atol(tmp)); |
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| 76 | |
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| 77 | tmp = getenv("ZZUF_MINRATIO"); |
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| 78 | tmp2 = getenv("ZZUF_MAXRATIO"); |
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| 79 | if(tmp && *tmp && tmp2 && *tmp2) |
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| 80 | _zz_setratio(atof(tmp), atof(tmp2)); |
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| 81 | |
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| 82 | tmp = getenv("ZZUF_AUTOINC"); |
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| 83 | if(tmp && *tmp == '1') |
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| 84 | _zz_setautoinc(); |
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| 85 | |
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| 86 | tmp = getenv("ZZUF_BYTES"); |
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| 87 | if(tmp && *tmp) |
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| 88 | _zz_bytes(tmp); |
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| 89 | |
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| 90 | tmp = getenv("ZZUF_PROTECT"); |
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| 91 | if(tmp && *tmp) |
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| 92 | _zz_protect(tmp); |
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| 93 | |
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| 94 | tmp = getenv("ZZUF_REFUSE"); |
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| 95 | if(tmp && *tmp) |
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| 96 | _zz_refuse(tmp); |
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| 97 | |
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| 98 | tmp = getenv("ZZUF_INCLUDE"); |
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| 99 | if(tmp && *tmp) |
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| 100 | _zz_include(tmp); |
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| 101 | |
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| 102 | tmp = getenv("ZZUF_EXCLUDE"); |
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| 103 | if(tmp && *tmp) |
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| 104 | _zz_exclude(tmp); |
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| 105 | |
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| 106 | tmp = getenv("ZZUF_SIGNAL"); |
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| 107 | if(tmp && *tmp == '1') |
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| 108 | _zz_signal = 1; |
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| 109 | |
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| 110 | tmp = getenv("ZZUF_MEMORY"); |
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| 111 | if(tmp && *tmp == '1') |
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| 112 | _zz_memory = 1; |
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| 113 | |
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| 114 | tmp = getenv("ZZUF_NETWORK"); |
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| 115 | if(tmp && *tmp == '1') |
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| 116 | _zz_network = 1; |
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| 117 | |
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| 118 | _zz_fd_init(); |
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| 119 | _zz_sys_init(); |
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| 120 | |
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| 121 | tmp = getenv("ZZUF_STDIN"); |
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| 122 | if(tmp && *tmp == '1') |
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| 123 | _zz_register(0); |
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| 124 | |
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| 125 | _zz_ready = 1; |
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| 126 | |
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| 127 | debug("libzzuf initialised for PID %li", (long int)getpid()); |
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| 128 | } |
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| 129 | |
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| 130 | /* Deinitialisation */ |
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| 131 | void _zz_fini(void) |
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| 132 | { |
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| 133 | _zz_fd_fini(); |
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| 134 | } |
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| 135 | |
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| 136 | #if defined HAVE_WINDOWS_H |
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| 137 | BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, PVOID impLoad) |
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| 138 | { |
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| 139 | (void)hinst; /* unused */ |
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| 140 | (void)impLoad; /* unused */ |
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| 141 | |
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| 142 | switch(reason) |
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| 143 | { |
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| 144 | case DLL_PROCESS_ATTACH: |
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| 145 | _zz_init(); |
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| 146 | break; |
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| 147 | case DLL_PROCESS_DETACH: |
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| 148 | _zz_fini(); |
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| 149 | break; |
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| 150 | } |
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| 151 | |
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| 152 | return TRUE; |
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| 153 | } |
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| 154 | #endif |
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