1 | // Copyright (c) 2004-2013 Sergey Lyubka |
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2 | // |
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3 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
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4 | // of this software and associated documentation files (the "Software"), to deal |
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5 | // in the Software without restriction, including without limitation the rights |
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6 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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7 | // copies of the Software, and to permit persons to whom the Software is |
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8 | // furnished to do so, subject to the following conditions: |
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9 | // |
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10 | // The above copyright notice and this permission notice shall be included in |
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11 | // all copies or substantial portions of the Software. |
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12 | // |
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13 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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14 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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15 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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16 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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17 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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18 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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19 | // THE SOFTWARE. |
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20 | |
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21 | #if HAVE_CONFIG_H |
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22 | #include "config.h" |
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23 | #endif |
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24 | |
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25 | #if defined(__rtems__) |
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26 | #include <md5.h> |
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27 | #define HAVE_MD5 |
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28 | #endif // __rtems__ |
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29 | |
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30 | #if defined(_WIN32) |
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31 | #if !defined(_CRT_SECURE_NO_WARNINGS) |
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32 | #define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005 |
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33 | #endif |
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34 | #else |
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35 | #ifdef __linux__ |
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36 | #define _XOPEN_SOURCE 600 // For flockfile() on Linux |
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37 | #endif |
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38 | #define _LARGEFILE_SOURCE // Enable 64-bit file offsets |
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39 | #define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++ |
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40 | #define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX |
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41 | #endif |
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42 | |
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43 | #if defined (_MSC_VER) |
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44 | // conditional expression is constant: introduced by FD_SET(..) |
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45 | #pragma warning (disable : 4127) |
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46 | // non-constant aggregate initializer: issued due to missing C99 support |
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47 | #pragma warning (disable : 4204) |
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48 | #endif |
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49 | |
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50 | // Disable WIN32_LEAN_AND_MEAN. |
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51 | // This makes windows.h always include winsock2.h |
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52 | #ifdef WIN32_LEAN_AND_MEAN |
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53 | #undef WIN32_LEAN_AND_MEAN |
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54 | #endif |
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55 | |
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56 | #if defined(__SYMBIAN32__) |
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57 | #define NO_SSL // SSL is not supported |
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58 | #define NO_CGI // CGI is not supported |
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59 | #define PATH_MAX FILENAME_MAX |
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60 | #endif // __SYMBIAN32__ |
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61 | |
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62 | #ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE |
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63 | #include <sys/types.h> |
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64 | #include <sys/stat.h> |
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65 | #include <errno.h> |
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66 | #include <signal.h> |
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67 | #include <fcntl.h> |
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68 | #endif // !_WIN32_WCE |
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69 | |
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70 | #include <time.h> |
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71 | #include <stdlib.h> |
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72 | #include <stdarg.h> |
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73 | #include <assert.h> |
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74 | #include <string.h> |
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75 | #include <ctype.h> |
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76 | #include <limits.h> |
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77 | #include <stddef.h> |
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78 | #include <stdio.h> |
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79 | |
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80 | #if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific |
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81 | #undef _WIN32_WINNT |
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82 | #define _WIN32_WINNT 0x0400 // To make it link in VS2005 |
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83 | #include <windows.h> |
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84 | |
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85 | #ifndef PATH_MAX |
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86 | #define PATH_MAX MAX_PATH |
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87 | #endif |
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88 | |
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89 | #ifndef _WIN32_WCE |
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90 | #include <process.h> |
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91 | #include <direct.h> |
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92 | #include <io.h> |
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93 | #else // _WIN32_WCE |
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94 | #define NO_CGI // WinCE has no pipes |
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95 | |
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96 | typedef long off_t; |
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97 | |
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98 | #define errno GetLastError() |
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99 | #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) |
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100 | #endif // _WIN32_WCE |
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101 | |
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102 | #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ |
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103 | ((uint64_t)((uint32_t)(hi))) << 32)) |
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104 | #define RATE_DIFF 10000000 // 100 nsecs |
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105 | #define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de) |
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106 | #define SYS2UNIX_TIME(lo, hi) \ |
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107 | (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) |
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108 | |
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109 | // Visual Studio 6 does not know __func__ or __FUNCTION__ |
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110 | // The rest of MS compilers use __FUNCTION__, not C99 __func__ |
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111 | // Also use _strtoui64 on modern M$ compilers |
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112 | #if defined(_MSC_VER) && _MSC_VER < 1300 |
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113 | #define STRX(x) #x |
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114 | #define STR(x) STRX(x) |
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115 | #define __func__ __FILE__ ":" STR(__LINE__) |
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116 | #define strtoull(x, y, z) (unsigned __int64) _atoi64(x) |
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117 | #define strtoll(x, y, z) _atoi64(x) |
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118 | #else |
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119 | #define __func__ __FUNCTION__ |
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120 | #define strtoull(x, y, z) _strtoui64(x, y, z) |
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121 | #define strtoll(x, y, z) _strtoi64(x, y, z) |
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122 | #endif // _MSC_VER |
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123 | |
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124 | #define ERRNO GetLastError() |
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125 | #define NO_SOCKLEN_T |
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126 | #define SSL_LIB "ssleay32.dll" |
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127 | #define CRYPTO_LIB "libeay32.dll" |
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128 | #define O_NONBLOCK 0 |
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129 | #if !defined(EWOULDBLOCK) |
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130 | #define EWOULDBLOCK WSAEWOULDBLOCK |
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131 | #endif // !EWOULDBLOCK |
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132 | #define _POSIX_ |
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133 | #define INT64_FMT "I64d" |
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134 | |
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135 | #define WINCDECL __cdecl |
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136 | #define SHUT_WR 1 |
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137 | #define snprintf _snprintf |
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138 | #define vsnprintf _vsnprintf |
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139 | #define mg_sleep(x) Sleep(x) |
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140 | |
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141 | #define pipe(x) _pipe(x, MG_BUF_LEN, _O_BINARY) |
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142 | #ifndef popen |
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143 | #define popen(x, y) _popen(x, y) |
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144 | #endif |
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145 | #ifndef pclose |
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146 | #define pclose(x) _pclose(x) |
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147 | #endif |
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148 | #define close(x) _close(x) |
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149 | #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) |
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150 | #define RTLD_LAZY 0 |
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151 | #define fseeko(x, y, z) _lseeki64(_fileno(x), (y), (z)) |
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152 | #define fdopen(x, y) _fdopen((x), (y)) |
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153 | #define write(x, y, z) _write((x), (y), (unsigned) z) |
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154 | #define read(x, y, z) _read((x), (y), (unsigned) z) |
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155 | #define flockfile(x) EnterCriticalSection(&global_log_file_lock) |
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156 | #define funlockfile(x) LeaveCriticalSection(&global_log_file_lock) |
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157 | #define sleep(x) Sleep((x) * 1000) |
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158 | #define rmdir(x) _rmdir(x) |
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159 | |
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160 | #if !defined(va_copy) |
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161 | #define va_copy(x, y) x = y |
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162 | #endif // !va_copy MINGW #defines va_copy |
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163 | |
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164 | #if !defined(fileno) |
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165 | #define fileno(x) _fileno(x) |
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166 | #endif // !fileno MINGW #defines fileno |
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167 | |
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168 | typedef HANDLE pthread_mutex_t; |
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169 | typedef struct {HANDLE signal, broadcast;} pthread_cond_t; |
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170 | typedef DWORD pthread_t; |
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171 | #define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here. |
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172 | |
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173 | static int pthread_mutex_lock(pthread_mutex_t *); |
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174 | static int pthread_mutex_unlock(pthread_mutex_t *); |
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175 | static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len); |
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176 | struct file; |
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177 | static char *mg_fgets(char *buf, size_t size, struct file *filep, char **p); |
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178 | |
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179 | #if defined(HAVE_STDINT) |
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180 | #include <stdint.h> |
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181 | #else |
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182 | typedef unsigned int uint32_t; |
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183 | typedef unsigned short uint16_t; |
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184 | typedef unsigned __int64 uint64_t; |
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185 | typedef __int64 int64_t; |
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186 | #define INT64_MAX 9223372036854775807 |
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187 | #endif // HAVE_STDINT |
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188 | |
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189 | // POSIX dirent interface |
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190 | struct dirent { |
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191 | char d_name[PATH_MAX]; |
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192 | }; |
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193 | |
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194 | typedef struct DIR { |
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195 | HANDLE handle; |
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196 | WIN32_FIND_DATAW info; |
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197 | struct dirent result; |
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198 | } DIR; |
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199 | |
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200 | |
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201 | // Mark required libraries |
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202 | #ifdef _MSC_VER |
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203 | #pragma comment(lib, "Ws2_32.lib") |
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204 | #endif |
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205 | |
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206 | #else // UNIX specific |
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207 | #include <sys/wait.h> |
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208 | #include <sys/socket.h> |
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209 | #include <sys/select.h> |
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210 | #ifdef HAVE_POLL |
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211 | #include <sys/poll.h> |
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212 | #endif |
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213 | #include <netinet/in.h> |
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214 | #include <arpa/inet.h> |
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215 | #include <sys/time.h> |
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216 | #include <stdint.h> |
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217 | #include <inttypes.h> |
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218 | #include <netdb.h> |
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219 | |
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220 | #include <pwd.h> |
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221 | #include <unistd.h> |
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222 | #include <dirent.h> |
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223 | #if !defined(NO_SSL_DL) && !defined(NO_SSL) |
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224 | #include <dlfcn.h> |
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225 | #endif |
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226 | #include <pthread.h> |
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227 | #if defined(__MACH__) |
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228 | #define SSL_LIB "libssl.dylib" |
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229 | #define CRYPTO_LIB "libcrypto.dylib" |
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230 | #else |
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231 | #if !defined(SSL_LIB) |
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232 | #define SSL_LIB "libssl.so" |
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233 | #endif |
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234 | #if !defined(CRYPTO_LIB) |
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235 | #define CRYPTO_LIB "libcrypto.so" |
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236 | #endif |
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237 | #endif |
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238 | #ifndef O_BINARY |
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239 | #define O_BINARY 0 |
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240 | #endif // O_BINARY |
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241 | #define closesocket(a) close(a) |
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242 | #define mg_mkdir(x, y) mkdir(x, y) |
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243 | #define mg_remove(x) remove(x) |
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244 | #define mg_sleep(x) usleep((x) * 1000) |
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245 | #define ERRNO errno |
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246 | #define INVALID_SOCKET (-1) |
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247 | #define INT64_FMT PRId64 |
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248 | typedef int SOCKET; |
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249 | #define WINCDECL |
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250 | |
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251 | #endif // End of Windows and UNIX specific includes |
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252 | |
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253 | #ifndef HAVE_POLL |
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254 | struct pollfd { |
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255 | SOCKET fd; |
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256 | short events; |
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257 | short revents; |
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258 | }; |
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259 | #define POLLIN 1 |
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260 | #endif |
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261 | |
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262 | #include "mongoose.h" |
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263 | |
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264 | #define MONGOOSE_VERSION "3.9" |
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265 | #define PASSWORDS_FILE_NAME ".htpasswd" |
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266 | #define CGI_ENVIRONMENT_SIZE 4096 |
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267 | #define MAX_CGI_ENVIR_VARS 64 |
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268 | #define MG_BUF_LEN 8192 |
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269 | #define MAX_REQUEST_SIZE 16384 |
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270 | #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) |
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271 | |
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272 | #ifdef _WIN32 |
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273 | static CRITICAL_SECTION global_log_file_lock; |
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274 | static pthread_t pthread_self(void) { |
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275 | return GetCurrentThreadId(); |
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276 | } |
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277 | #endif // _WIN32 |
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278 | |
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279 | #ifdef DEBUG_TRACE |
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280 | #undef DEBUG_TRACE |
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281 | #define DEBUG_TRACE(x) |
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282 | #else |
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283 | #if defined(DEBUG) |
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284 | #define DEBUG_TRACE(x) do { \ |
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285 | flockfile(stdout); \ |
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286 | printf("*** %lu.%p.%s.%d: ", \ |
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287 | (unsigned long) time(NULL), (void *) pthread_self(), \ |
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288 | __func__, __LINE__); \ |
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289 | printf x; \ |
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290 | putchar('\n'); \ |
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291 | fflush(stdout); \ |
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292 | funlockfile(stdout); \ |
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293 | } while (0) |
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294 | #else |
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295 | #define DEBUG_TRACE(x) |
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296 | #endif // DEBUG |
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297 | #endif // DEBUG_TRACE |
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298 | |
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299 | // Darwin prior to 7.0 and Win32 do not have socklen_t |
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300 | #ifdef NO_SOCKLEN_T |
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301 | typedef int socklen_t; |
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302 | #endif // NO_SOCKLEN_T |
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303 | #define _DARWIN_UNLIMITED_SELECT |
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304 | |
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305 | #define IP_ADDR_STR_LEN 50 // IPv6 hex string is 46 chars |
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306 | |
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307 | #if !defined(MSG_NOSIGNAL) |
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308 | #define MSG_NOSIGNAL 0 |
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309 | #endif |
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310 | |
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311 | #if !defined(SOMAXCONN) |
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312 | #define SOMAXCONN 100 |
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313 | #endif |
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314 | |
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315 | #if !defined(PATH_MAX) |
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316 | #define PATH_MAX 4096 |
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317 | #endif |
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318 | |
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319 | // Size of the accepted socket queue |
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320 | #if !defined(MGSQLEN) |
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321 | #define MGSQLEN 20 |
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322 | #endif |
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323 | |
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324 | static const char *http_500_error = "Internal Server Error"; |
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325 | |
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326 | #if defined(NO_SSL_DL) |
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327 | #include <openssl/ssl.h> |
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328 | #include <openssl/err.h> |
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329 | #else |
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330 | // SSL loaded dynamically from DLL. |
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331 | // I put the prototypes here to be independent from OpenSSL source installation. |
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332 | typedef struct ssl_st SSL; |
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333 | typedef struct ssl_method_st SSL_METHOD; |
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334 | typedef struct ssl_ctx_st SSL_CTX; |
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335 | |
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336 | struct ssl_func { |
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337 | const char *name; // SSL function name |
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338 | void (*ptr)(void); // Function pointer |
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339 | }; |
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340 | |
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341 | #define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr) |
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342 | #define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr) |
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343 | #define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr) |
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344 | #define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr) |
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345 | #define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr) |
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346 | #define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr) |
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347 | #define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr) |
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348 | #define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr) |
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349 | #define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr) |
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350 | #define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr) |
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351 | #define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr) |
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352 | #define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \ |
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353 | const char *, int)) ssl_sw[11].ptr) |
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354 | #define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \ |
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355 | const char *, int)) ssl_sw[12].ptr) |
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356 | #define SSL_CTX_set_default_passwd_cb \ |
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357 | (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr) |
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358 | #define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr) |
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359 | #define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr) |
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360 | #define SSL_CTX_use_certificate_chain_file \ |
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361 | (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr) |
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362 | #define SSLv23_client_method (* (SSL_METHOD * (*)(void)) ssl_sw[17].ptr) |
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363 | #define SSL_pending (* (int (*)(SSL *)) ssl_sw[18].ptr) |
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364 | #define SSL_CTX_set_verify (* (void (*)(SSL_CTX *, int, int)) ssl_sw[19].ptr) |
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365 | #define SSL_shutdown (* (int (*)(SSL *)) ssl_sw[20].ptr) |
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366 | |
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367 | #define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr) |
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368 | #define CRYPTO_set_locking_callback \ |
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369 | (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr) |
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370 | #define CRYPTO_set_id_callback \ |
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371 | (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr) |
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372 | #define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr) |
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373 | #define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr) |
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374 | |
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375 | // set_ssl_option() function updates this array. |
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376 | // It loads SSL library dynamically and changes NULLs to the actual addresses |
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377 | // of respective functions. The macros above (like SSL_connect()) are really |
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378 | // just calling these functions indirectly via the pointer. |
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379 | static struct ssl_func ssl_sw[] = { |
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380 | {"SSL_free", NULL}, |
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381 | {"SSL_accept", NULL}, |
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382 | {"SSL_connect", NULL}, |
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383 | {"SSL_read", NULL}, |
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384 | {"SSL_write", NULL}, |
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385 | {"SSL_get_error", NULL}, |
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386 | {"SSL_set_fd", NULL}, |
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387 | {"SSL_new", NULL}, |
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388 | {"SSL_CTX_new", NULL}, |
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389 | {"SSLv23_server_method", NULL}, |
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390 | {"SSL_library_init", NULL}, |
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391 | {"SSL_CTX_use_PrivateKey_file", NULL}, |
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392 | {"SSL_CTX_use_certificate_file",NULL}, |
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393 | {"SSL_CTX_set_default_passwd_cb",NULL}, |
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394 | {"SSL_CTX_free", NULL}, |
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395 | {"SSL_load_error_strings", NULL}, |
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396 | {"SSL_CTX_use_certificate_chain_file", NULL}, |
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397 | {"SSLv23_client_method", NULL}, |
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398 | {"SSL_pending", NULL}, |
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399 | {"SSL_CTX_set_verify", NULL}, |
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400 | {"SSL_shutdown", NULL}, |
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401 | {NULL, NULL} |
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402 | }; |
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403 | |
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404 | // Similar array as ssl_sw. These functions could be located in different lib. |
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405 | #if !defined(NO_SSL) |
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406 | static struct ssl_func crypto_sw[] = { |
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407 | {"CRYPTO_num_locks", NULL}, |
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408 | {"CRYPTO_set_locking_callback", NULL}, |
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409 | {"CRYPTO_set_id_callback", NULL}, |
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410 | {"ERR_get_error", NULL}, |
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411 | {"ERR_error_string", NULL}, |
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412 | {NULL, NULL} |
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413 | }; |
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414 | #endif // NO_SSL |
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415 | #endif // NO_SSL_DL |
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416 | |
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417 | static const char *month_names[] = { |
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418 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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419 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
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420 | }; |
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421 | |
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422 | // Unified socket address. For IPv6 support, add IPv6 address structure |
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423 | // in the union u. |
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424 | union usa { |
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425 | struct sockaddr sa; |
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426 | struct sockaddr_in sin; |
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427 | #if defined(USE_IPV6) |
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428 | struct sockaddr_in6 sin6; |
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429 | #endif |
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430 | }; |
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431 | |
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432 | // Describes a string (chunk of memory). |
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433 | struct vec { |
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434 | const char *ptr; |
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435 | size_t len; |
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436 | }; |
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437 | |
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438 | struct file { |
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439 | int is_directory; |
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440 | time_t modification_time; |
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441 | int64_t size; |
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442 | FILE *fp; |
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443 | const char *membuf; // Non-NULL if file data is in memory |
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444 | // set to 1 if the content is gzipped |
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445 | // in which case we need a content-encoding: gzip header |
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446 | int gzipped; |
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447 | }; |
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448 | #define STRUCT_FILE_INITIALIZER {0, 0, 0, NULL, NULL, 0} |
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449 | |
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450 | // Describes listening socket, or socket which was accept()-ed by the master |
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451 | // thread and queued for future handling by the worker thread. |
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452 | struct socket { |
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453 | SOCKET sock; // Listening socket |
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454 | union usa lsa; // Local socket address |
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455 | union usa rsa; // Remote socket address |
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456 | unsigned is_ssl:1; // Is port SSL-ed |
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457 | unsigned ssl_redir:1; // Is port supposed to redirect everything to SSL port |
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458 | }; |
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459 | |
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460 | // NOTE(lsm): this enum shoulds be in sync with the config_options below. |
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461 | enum { |
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462 | CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER, |
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463 | PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, THROTTLE, |
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464 | ACCESS_LOG_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE, |
---|
465 | GLOBAL_PASSWORDS_FILE, INDEX_FILES, ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, |
---|
466 | EXTRA_MIME_TYPES, LISTENING_PORTS, DOCUMENT_ROOT, SSL_CERTIFICATE, |
---|
467 | NUM_THREADS, RUN_AS_USER, REWRITE, HIDE_FILES, REQUEST_TIMEOUT, |
---|
468 | THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_POLICY, |
---|
469 | NUM_OPTIONS |
---|
470 | }; |
---|
471 | |
---|
472 | static const char *config_options[] = { |
---|
473 | "cgi_pattern", "**.cgi$|**.pl$|**.php$", |
---|
474 | "cgi_environment", NULL, |
---|
475 | "put_delete_auth_file", NULL, |
---|
476 | "cgi_interpreter", NULL, |
---|
477 | "protect_uri", NULL, |
---|
478 | "authentication_domain", "mydomain.com", |
---|
479 | "ssi_pattern", "**.shtml$|**.shtm$", |
---|
480 | "throttle", NULL, |
---|
481 | "access_log_file", NULL, |
---|
482 | "enable_directory_listing", "yes", |
---|
483 | "error_log_file", NULL, |
---|
484 | "global_auth_file", NULL, |
---|
485 | "index_files", |
---|
486 | "index.html,index.htm,index.cgi,index.shtml,index.php,index.lp", |
---|
487 | "enable_keep_alive", "no", |
---|
488 | "access_control_list", NULL, |
---|
489 | "extra_mime_types", NULL, |
---|
490 | "listening_ports", "8080", |
---|
491 | "document_root", NULL, |
---|
492 | "ssl_certificate", NULL, |
---|
493 | "num_threads", "50", |
---|
494 | "run_as_user", NULL, |
---|
495 | "url_rewrite_patterns", NULL, |
---|
496 | "hide_files_patterns", NULL, |
---|
497 | "request_timeout_ms", "30000", |
---|
498 | "thread_stack_size", NULL, |
---|
499 | "thread_priority", NULL, |
---|
500 | "thread_policy", NULL, |
---|
501 | NULL |
---|
502 | }; |
---|
503 | |
---|
504 | struct mg_context { |
---|
505 | volatile int stop_flag; // Should we stop event loop |
---|
506 | SSL_CTX *ssl_ctx; // SSL context |
---|
507 | char *config[NUM_OPTIONS]; // Mongoose configuration parameters |
---|
508 | struct mg_callbacks callbacks; // User-defined callback function |
---|
509 | void *user_data; // User-defined data |
---|
510 | |
---|
511 | struct socket *listening_sockets; |
---|
512 | int num_listening_sockets; |
---|
513 | |
---|
514 | volatile int num_threads; // Number of threads |
---|
515 | pthread_mutex_t mutex; // Protects (max|num)_threads |
---|
516 | pthread_cond_t cond; // Condvar for tracking workers terminations |
---|
517 | |
---|
518 | struct socket queue[MGSQLEN]; // Accepted sockets |
---|
519 | volatile int sq_head; // Head of the socket queue |
---|
520 | volatile int sq_tail; // Tail of the socket queue |
---|
521 | pthread_cond_t sq_full; // Signaled when socket is produced |
---|
522 | pthread_cond_t sq_empty; // Signaled when socket is consumed |
---|
523 | }; |
---|
524 | |
---|
525 | struct mg_connection { |
---|
526 | struct mg_request_info request_info; |
---|
527 | struct mg_context *ctx; |
---|
528 | SSL *ssl; // SSL descriptor |
---|
529 | SSL_CTX *client_ssl_ctx; // SSL context for client connections |
---|
530 | struct socket client; // Connected client |
---|
531 | time_t birth_time; // Time when request was received |
---|
532 | int64_t num_bytes_sent; // Total bytes sent to client |
---|
533 | int64_t content_len; // Content-Length header value |
---|
534 | int64_t consumed_content; // How many bytes of content have been read |
---|
535 | char *buf; // Buffer for received data |
---|
536 | char *path_info; // PATH_INFO part of the URL |
---|
537 | int must_close; // 1 if connection must be closed |
---|
538 | int buf_size; // Buffer size |
---|
539 | int request_len; // Size of the request + headers in a buffer |
---|
540 | int data_len; // Total size of data in a buffer |
---|
541 | int status_code; // HTTP reply status code, e.g. 200 |
---|
542 | int throttle; // Throttling, bytes/sec. <= 0 means no throttle |
---|
543 | time_t last_throttle_time; // Last time throttled data was sent |
---|
544 | int64_t last_throttle_bytes;// Bytes sent this second |
---|
545 | }; |
---|
546 | |
---|
547 | // Directory entry |
---|
548 | struct de { |
---|
549 | struct mg_connection *conn; |
---|
550 | char *file_name; |
---|
551 | struct file file; |
---|
552 | }; |
---|
553 | |
---|
554 | const char **mg_get_valid_option_names(void) { |
---|
555 | return config_options; |
---|
556 | } |
---|
557 | |
---|
558 | static int is_file_in_memory(struct mg_connection *conn, const char *path, |
---|
559 | struct file *filep) { |
---|
560 | size_t size = 0; |
---|
561 | if ((filep->membuf = conn->ctx->callbacks.open_file == NULL ? NULL : |
---|
562 | conn->ctx->callbacks.open_file(conn, path, &size)) != NULL) { |
---|
563 | // NOTE: override filep->size only on success. Otherwise, it might break |
---|
564 | // constructs like if (!mg_stat() || !mg_fopen()) ... |
---|
565 | filep->size = size; |
---|
566 | } |
---|
567 | return filep->membuf != NULL; |
---|
568 | } |
---|
569 | |
---|
570 | static int is_file_opened(const struct file *filep) { |
---|
571 | return filep->membuf != NULL || filep->fp != NULL; |
---|
572 | } |
---|
573 | |
---|
574 | static int mg_fopen(struct mg_connection *conn, const char *path, |
---|
575 | const char *mode, struct file *filep) { |
---|
576 | if (!is_file_in_memory(conn, path, filep)) { |
---|
577 | #ifdef _WIN32 |
---|
578 | wchar_t wbuf[PATH_MAX], wmode[20]; |
---|
579 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
580 | MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); |
---|
581 | filep->fp = _wfopen(wbuf, wmode); |
---|
582 | #else |
---|
583 | filep->fp = fopen(path, mode); |
---|
584 | #endif |
---|
585 | } |
---|
586 | |
---|
587 | return is_file_opened(filep); |
---|
588 | } |
---|
589 | |
---|
590 | static void mg_fclose(struct file *filep) { |
---|
591 | if (filep != NULL && filep->fp != NULL) { |
---|
592 | fclose(filep->fp); |
---|
593 | } |
---|
594 | } |
---|
595 | |
---|
596 | static int get_option_index(const char *name) { |
---|
597 | int i; |
---|
598 | |
---|
599 | for (i = 0; config_options[i * 2] != NULL; i++) { |
---|
600 | if (strcmp(config_options[i * 2], name) == 0) { |
---|
601 | return i; |
---|
602 | } |
---|
603 | } |
---|
604 | return -1; |
---|
605 | } |
---|
606 | |
---|
607 | const char *mg_get_option(const struct mg_context *ctx, const char *name) { |
---|
608 | int i; |
---|
609 | if ((i = get_option_index(name)) == -1) { |
---|
610 | return NULL; |
---|
611 | } else if (ctx->config[i] == NULL) { |
---|
612 | return ""; |
---|
613 | } else { |
---|
614 | return ctx->config[i]; |
---|
615 | } |
---|
616 | } |
---|
617 | |
---|
618 | static void sockaddr_to_string(char *buf, size_t len, |
---|
619 | const union usa *usa) { |
---|
620 | buf[0] = '\0'; |
---|
621 | #if defined(USE_IPV6) |
---|
622 | inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ? |
---|
623 | (void *) &usa->sin.sin_addr : |
---|
624 | (void *) &usa->sin6.sin6_addr, buf, len); |
---|
625 | #elif defined(_WIN32) |
---|
626 | // Only Windoze Vista (and newer) have inet_ntop() |
---|
627 | strncpy(buf, inet_ntoa(usa->sin.sin_addr), len); |
---|
628 | #else |
---|
629 | inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); |
---|
630 | #endif |
---|
631 | } |
---|
632 | |
---|
633 | static void cry(struct mg_connection *conn, |
---|
634 | PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(2, 3); |
---|
635 | |
---|
636 | // Print error message to the opened error log stream. |
---|
637 | static void cry(struct mg_connection *conn, const char *fmt, ...) { |
---|
638 | char buf[MG_BUF_LEN], src_addr[IP_ADDR_STR_LEN]; |
---|
639 | va_list ap; |
---|
640 | FILE *fp; |
---|
641 | time_t timestamp; |
---|
642 | |
---|
643 | va_start(ap, fmt); |
---|
644 | (void) vsnprintf(buf, sizeof(buf), fmt, ap); |
---|
645 | va_end(ap); |
---|
646 | |
---|
647 | // Do not lock when getting the callback value, here and below. |
---|
648 | // I suppose this is fine, since function cannot disappear in the |
---|
649 | // same way string option can. |
---|
650 | if (conn->ctx->callbacks.log_message == NULL || |
---|
651 | conn->ctx->callbacks.log_message(conn, buf) == 0) { |
---|
652 | fp = conn->ctx == NULL || conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL : |
---|
653 | fopen(conn->ctx->config[ERROR_LOG_FILE], "a+"); |
---|
654 | |
---|
655 | if (fp != NULL) { |
---|
656 | flockfile(fp); |
---|
657 | timestamp = time(NULL); |
---|
658 | |
---|
659 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
660 | fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp, |
---|
661 | src_addr); |
---|
662 | |
---|
663 | if (conn->request_info.request_method != NULL) { |
---|
664 | fprintf(fp, "%s %s: ", conn->request_info.request_method, |
---|
665 | conn->request_info.uri); |
---|
666 | } |
---|
667 | |
---|
668 | fprintf(fp, "%s", buf); |
---|
669 | fputc('\n', fp); |
---|
670 | funlockfile(fp); |
---|
671 | fclose(fp); |
---|
672 | } |
---|
673 | } |
---|
674 | } |
---|
675 | |
---|
676 | // Return fake connection structure. Used for logging, if connection |
---|
677 | // is not applicable at the moment of logging. |
---|
678 | static struct mg_connection *fc(struct mg_context *ctx) { |
---|
679 | static struct mg_connection fake_connection; |
---|
680 | fake_connection.ctx = ctx; |
---|
681 | return &fake_connection; |
---|
682 | } |
---|
683 | |
---|
684 | const char *mg_version(void) { |
---|
685 | return MONGOOSE_VERSION; |
---|
686 | } |
---|
687 | |
---|
688 | struct mg_request_info *mg_get_request_info(struct mg_connection *conn) { |
---|
689 | return &conn->request_info; |
---|
690 | } |
---|
691 | |
---|
692 | static void mg_strlcpy(register char *dst, register const char *src, size_t n) { |
---|
693 | for (; *src != '\0' && n > 1; n--) { |
---|
694 | *dst++ = *src++; |
---|
695 | } |
---|
696 | *dst = '\0'; |
---|
697 | } |
---|
698 | |
---|
699 | static int lowercase(const char *s) { |
---|
700 | return tolower(* (const unsigned char *) s); |
---|
701 | } |
---|
702 | |
---|
703 | static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { |
---|
704 | int diff = 0; |
---|
705 | |
---|
706 | if (len > 0) |
---|
707 | do { |
---|
708 | diff = lowercase(s1++) - lowercase(s2++); |
---|
709 | } while (diff == 0 && s1[-1] != '\0' && --len > 0); |
---|
710 | |
---|
711 | return diff; |
---|
712 | } |
---|
713 | |
---|
714 | static int mg_strcasecmp(const char *s1, const char *s2) { |
---|
715 | int diff; |
---|
716 | |
---|
717 | do { |
---|
718 | diff = lowercase(s1++) - lowercase(s2++); |
---|
719 | } while (diff == 0 && s1[-1] != '\0'); |
---|
720 | |
---|
721 | return diff; |
---|
722 | } |
---|
723 | |
---|
724 | static char * mg_strndup(const char *ptr, size_t len) { |
---|
725 | char *p; |
---|
726 | |
---|
727 | if ((p = (char *) malloc(len + 1)) != NULL) { |
---|
728 | mg_strlcpy(p, ptr, len + 1); |
---|
729 | } |
---|
730 | |
---|
731 | return p; |
---|
732 | } |
---|
733 | |
---|
734 | static char * mg_strdup(const char *str) { |
---|
735 | return mg_strndup(str, strlen(str)); |
---|
736 | } |
---|
737 | |
---|
738 | static const char *mg_strcasestr(const char *big_str, const char *small_str) { |
---|
739 | int i, big_len = strlen(big_str), small_len = strlen(small_str); |
---|
740 | |
---|
741 | for (i = 0; i <= big_len - small_len; i++) { |
---|
742 | if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) { |
---|
743 | return big_str + i; |
---|
744 | } |
---|
745 | } |
---|
746 | |
---|
747 | return NULL; |
---|
748 | } |
---|
749 | |
---|
750 | // Like snprintf(), but never returns negative value, or a value |
---|
751 | // that is larger than a supplied buffer. |
---|
752 | // Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability |
---|
753 | // in his audit report. |
---|
754 | static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen, |
---|
755 | const char *fmt, va_list ap) { |
---|
756 | int n; |
---|
757 | |
---|
758 | if (buflen == 0) |
---|
759 | return 0; |
---|
760 | |
---|
761 | n = vsnprintf(buf, buflen, fmt, ap); |
---|
762 | |
---|
763 | if (n < 0) { |
---|
764 | cry(conn, "vsnprintf error"); |
---|
765 | n = 0; |
---|
766 | } else if (n >= (int) buflen) { |
---|
767 | cry(conn, "truncating vsnprintf buffer: [%.*s]", |
---|
768 | n > 200 ? 200 : n, buf); |
---|
769 | n = (int) buflen - 1; |
---|
770 | } |
---|
771 | buf[n] = '\0'; |
---|
772 | |
---|
773 | return n; |
---|
774 | } |
---|
775 | |
---|
776 | static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, |
---|
777 | PRINTF_FORMAT_STRING(const char *fmt), ...) |
---|
778 | PRINTF_ARGS(4, 5); |
---|
779 | |
---|
780 | static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, |
---|
781 | const char *fmt, ...) { |
---|
782 | va_list ap; |
---|
783 | int n; |
---|
784 | |
---|
785 | va_start(ap, fmt); |
---|
786 | n = mg_vsnprintf(conn, buf, buflen, fmt, ap); |
---|
787 | va_end(ap); |
---|
788 | |
---|
789 | return n; |
---|
790 | } |
---|
791 | |
---|
792 | // Skip the characters until one of the delimiters characters found. |
---|
793 | // 0-terminate resulting word. Skip the delimiter and following whitespaces. |
---|
794 | // Advance pointer to buffer to the next word. Return found 0-terminated word. |
---|
795 | // Delimiters can be quoted with quotechar. |
---|
796 | static char *skip_quoted(char **buf, const char *delimiters, |
---|
797 | const char *whitespace, char quotechar) { |
---|
798 | char *p, *begin_word, *end_word, *end_whitespace; |
---|
799 | |
---|
800 | begin_word = *buf; |
---|
801 | end_word = begin_word + strcspn(begin_word, delimiters); |
---|
802 | |
---|
803 | // Check for quotechar |
---|
804 | if (end_word > begin_word) { |
---|
805 | p = end_word - 1; |
---|
806 | while (*p == quotechar) { |
---|
807 | // If there is anything beyond end_word, copy it |
---|
808 | if (*end_word == '\0') { |
---|
809 | |
---|
810 | *p = '\0'; |
---|
811 | break; |
---|
812 | } else { |
---|
813 | size_t end_off = strcspn(end_word + 1, delimiters); |
---|
814 | memmove (p, end_word, end_off + 1); |
---|
815 | p += end_off; // p must correspond to end_word - 1 |
---|
816 | end_word += end_off + 1; |
---|
817 | } |
---|
818 | } |
---|
819 | for (p++; p < end_word; p++) { |
---|
820 | *p = '\0'; |
---|
821 | } |
---|
822 | } |
---|
823 | |
---|
824 | if (*end_word == '\0') { |
---|
825 | *buf = end_word; |
---|
826 | } else { |
---|
827 | end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace); |
---|
828 | |
---|
829 | for (p = end_word; p < end_whitespace; p++) { |
---|
830 | *p = '\0'; |
---|
831 | } |
---|
832 | |
---|
833 | *buf = end_whitespace; |
---|
834 | } |
---|
835 | |
---|
836 | return begin_word; |
---|
837 | } |
---|
838 | |
---|
839 | // Simplified version of skip_quoted without quote char |
---|
840 | // and whitespace == delimiters |
---|
841 | static char *skip(char **buf, const char *delimiters) { |
---|
842 | return skip_quoted(buf, delimiters, delimiters, 0); |
---|
843 | } |
---|
844 | |
---|
845 | |
---|
846 | // Return HTTP header value, or NULL if not found. |
---|
847 | static const char *get_header(const struct mg_request_info *ri, |
---|
848 | const char *name) { |
---|
849 | int i; |
---|
850 | |
---|
851 | for (i = 0; i < ri->num_headers; i++) |
---|
852 | if (!mg_strcasecmp(name, ri->http_headers[i].name)) |
---|
853 | return ri->http_headers[i].value; |
---|
854 | |
---|
855 | return NULL; |
---|
856 | } |
---|
857 | |
---|
858 | const char *mg_get_header(const struct mg_connection *conn, const char *name) { |
---|
859 | return get_header(&conn->request_info, name); |
---|
860 | } |
---|
861 | |
---|
862 | // A helper function for traversing a comma separated list of values. |
---|
863 | // It returns a list pointer shifted to the next value, or NULL if the end |
---|
864 | // of the list found. |
---|
865 | // Value is stored in val vector. If value has form "x=y", then eq_val |
---|
866 | // vector is initialized to point to the "y" part, and val vector length |
---|
867 | // is adjusted to point only to "x". |
---|
868 | static const char *next_option(const char *list, struct vec *val, |
---|
869 | struct vec *eq_val) { |
---|
870 | if (list == NULL || *list == '\0') { |
---|
871 | // End of the list |
---|
872 | list = NULL; |
---|
873 | } else { |
---|
874 | val->ptr = list; |
---|
875 | if ((list = strchr(val->ptr, ',')) != NULL) { |
---|
876 | // Comma found. Store length and shift the list ptr |
---|
877 | val->len = list - val->ptr; |
---|
878 | list++; |
---|
879 | } else { |
---|
880 | // This value is the last one |
---|
881 | list = val->ptr + strlen(val->ptr); |
---|
882 | val->len = list - val->ptr; |
---|
883 | } |
---|
884 | |
---|
885 | if (eq_val != NULL) { |
---|
886 | // Value has form "x=y", adjust pointers and lengths |
---|
887 | // so that val points to "x", and eq_val points to "y". |
---|
888 | eq_val->len = 0; |
---|
889 | eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); |
---|
890 | if (eq_val->ptr != NULL) { |
---|
891 | eq_val->ptr++; // Skip over '=' character |
---|
892 | eq_val->len = val->ptr + val->len - eq_val->ptr; |
---|
893 | val->len = (eq_val->ptr - val->ptr) - 1; |
---|
894 | } |
---|
895 | } |
---|
896 | } |
---|
897 | |
---|
898 | return list; |
---|
899 | } |
---|
900 | |
---|
901 | // Perform case-insensitive match of string against pattern |
---|
902 | static int match_prefix(const char *pattern, int pattern_len, const char *str) { |
---|
903 | const char *or_str; |
---|
904 | int i, j, len, res; |
---|
905 | |
---|
906 | if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { |
---|
907 | res = match_prefix(pattern, or_str - pattern, str); |
---|
908 | return res > 0 ? res : |
---|
909 | match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str); |
---|
910 | } |
---|
911 | |
---|
912 | i = j = 0; |
---|
913 | res = -1; |
---|
914 | for (; i < pattern_len; i++, j++) { |
---|
915 | if (pattern[i] == '?' && str[j] != '\0') { |
---|
916 | continue; |
---|
917 | } else if (pattern[i] == '$') { |
---|
918 | return str[j] == '\0' ? j : -1; |
---|
919 | } else if (pattern[i] == '*') { |
---|
920 | i++; |
---|
921 | if (pattern[i] == '*') { |
---|
922 | i++; |
---|
923 | len = (int) strlen(str + j); |
---|
924 | } else { |
---|
925 | len = (int) strcspn(str + j, "/"); |
---|
926 | } |
---|
927 | if (i == pattern_len) { |
---|
928 | return j + len; |
---|
929 | } |
---|
930 | do { |
---|
931 | res = match_prefix(pattern + i, pattern_len - i, str + j + len); |
---|
932 | } while (res == -1 && len-- > 0); |
---|
933 | return res == -1 ? -1 : j + res + len; |
---|
934 | } else if (lowercase(&pattern[i]) != lowercase(&str[j])) { |
---|
935 | return -1; |
---|
936 | } |
---|
937 | } |
---|
938 | return j; |
---|
939 | } |
---|
940 | |
---|
941 | // HTTP 1.1 assumes keep alive if "Connection:" header is not set |
---|
942 | // This function must tolerate situations when connection info is not |
---|
943 | // set up, for example if request parsing failed. |
---|
944 | static int should_keep_alive(const struct mg_connection *conn) { |
---|
945 | const char *http_version = conn->request_info.http_version; |
---|
946 | const char *header = mg_get_header(conn, "Connection"); |
---|
947 | if (conn->must_close || |
---|
948 | conn->status_code == 401 || |
---|
949 | mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 || |
---|
950 | (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) || |
---|
951 | (header == NULL && http_version && strcmp(http_version, "1.1"))) { |
---|
952 | return 0; |
---|
953 | } |
---|
954 | return 1; |
---|
955 | } |
---|
956 | |
---|
957 | static const char *suggest_connection_header(const struct mg_connection *conn) { |
---|
958 | return should_keep_alive(conn) ? "keep-alive" : "close"; |
---|
959 | } |
---|
960 | |
---|
961 | static void send_http_error(struct mg_connection *, int, const char *, |
---|
962 | PRINTF_FORMAT_STRING(const char *fmt), ...) |
---|
963 | PRINTF_ARGS(4, 5); |
---|
964 | |
---|
965 | |
---|
966 | static void send_http_error(struct mg_connection *conn, int status, |
---|
967 | const char *reason, const char *fmt, ...) { |
---|
968 | char buf[MG_BUF_LEN]; |
---|
969 | va_list ap; |
---|
970 | int len = 0; |
---|
971 | |
---|
972 | conn->status_code = status; |
---|
973 | if (conn->ctx->callbacks.http_error == NULL || |
---|
974 | conn->ctx->callbacks.http_error(conn, status)) { |
---|
975 | buf[0] = '\0'; |
---|
976 | |
---|
977 | // Errors 1xx, 204 and 304 MUST NOT send a body |
---|
978 | if (status > 199 && status != 204 && status != 304) { |
---|
979 | len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason); |
---|
980 | buf[len++] = '\n'; |
---|
981 | |
---|
982 | va_start(ap, fmt); |
---|
983 | len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap); |
---|
984 | va_end(ap); |
---|
985 | } |
---|
986 | DEBUG_TRACE(("[%s]", buf)); |
---|
987 | |
---|
988 | mg_printf(conn, "HTTP/1.1 %d %s\r\n" |
---|
989 | "Content-Length: %d\r\n" |
---|
990 | "Connection: %s\r\n\r\n", status, reason, len, |
---|
991 | suggest_connection_header(conn)); |
---|
992 | conn->num_bytes_sent += mg_printf(conn, "%s", buf); |
---|
993 | } |
---|
994 | } |
---|
995 | |
---|
996 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
997 | static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) { |
---|
998 | (void) unused; |
---|
999 | *mutex = CreateMutex(NULL, FALSE, NULL); |
---|
1000 | return *mutex == NULL ? -1 : 0; |
---|
1001 | } |
---|
1002 | |
---|
1003 | static int pthread_mutex_destroy(pthread_mutex_t *mutex) { |
---|
1004 | return CloseHandle(*mutex) == 0 ? -1 : 0; |
---|
1005 | } |
---|
1006 | |
---|
1007 | static int pthread_mutex_lock(pthread_mutex_t *mutex) { |
---|
1008 | return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; |
---|
1009 | } |
---|
1010 | |
---|
1011 | static int pthread_mutex_unlock(pthread_mutex_t *mutex) { |
---|
1012 | return ReleaseMutex(*mutex) == 0 ? -1 : 0; |
---|
1013 | } |
---|
1014 | |
---|
1015 | static int pthread_cond_init(pthread_cond_t *cv, const void *unused) { |
---|
1016 | (void) unused; |
---|
1017 | cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL); |
---|
1018 | cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL); |
---|
1019 | return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1; |
---|
1020 | } |
---|
1021 | |
---|
1022 | static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) { |
---|
1023 | HANDLE handles[] = {cv->signal, cv->broadcast}; |
---|
1024 | ReleaseMutex(*mutex); |
---|
1025 | WaitForMultipleObjects(2, handles, FALSE, INFINITE); |
---|
1026 | return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; |
---|
1027 | } |
---|
1028 | |
---|
1029 | static int pthread_cond_signal(pthread_cond_t *cv) { |
---|
1030 | return SetEvent(cv->signal) == 0 ? -1 : 0; |
---|
1031 | } |
---|
1032 | |
---|
1033 | static int pthread_cond_broadcast(pthread_cond_t *cv) { |
---|
1034 | // Implementation with PulseEvent() has race condition, see |
---|
1035 | // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html |
---|
1036 | return PulseEvent(cv->broadcast) == 0 ? -1 : 0; |
---|
1037 | } |
---|
1038 | |
---|
1039 | static int pthread_cond_destroy(pthread_cond_t *cv) { |
---|
1040 | return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1; |
---|
1041 | } |
---|
1042 | |
---|
1043 | // For Windows, change all slashes to backslashes in path names. |
---|
1044 | static void change_slashes_to_backslashes(char *path) { |
---|
1045 | int i; |
---|
1046 | |
---|
1047 | for (i = 0; path[i] != '\0'; i++) { |
---|
1048 | if (path[i] == '/') |
---|
1049 | path[i] = '\\'; |
---|
1050 | // i > 0 check is to preserve UNC paths, like \\server\file.txt |
---|
1051 | if (path[i] == '\\' && i > 0) |
---|
1052 | while (path[i + 1] == '\\' || path[i + 1] == '/') |
---|
1053 | (void) memmove(path + i + 1, |
---|
1054 | path + i + 2, strlen(path + i + 1)); |
---|
1055 | } |
---|
1056 | } |
---|
1057 | |
---|
1058 | // Encode 'path' which is assumed UTF-8 string, into UNICODE string. |
---|
1059 | // wbuf and wbuf_len is a target buffer and its length. |
---|
1060 | static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) { |
---|
1061 | char buf[PATH_MAX], buf2[PATH_MAX]; |
---|
1062 | |
---|
1063 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
1064 | change_slashes_to_backslashes(buf); |
---|
1065 | |
---|
1066 | // Convert to Unicode and back. If doubly-converted string does not |
---|
1067 | // match the original, something is fishy, reject. |
---|
1068 | memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); |
---|
1069 | MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); |
---|
1070 | WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), |
---|
1071 | NULL, NULL); |
---|
1072 | if (strcmp(buf, buf2) != 0) { |
---|
1073 | wbuf[0] = L'\0'; |
---|
1074 | } |
---|
1075 | } |
---|
1076 | |
---|
1077 | #if defined(_WIN32_WCE) |
---|
1078 | static time_t time(time_t *ptime) { |
---|
1079 | time_t t; |
---|
1080 | SYSTEMTIME st; |
---|
1081 | FILETIME ft; |
---|
1082 | |
---|
1083 | GetSystemTime(&st); |
---|
1084 | SystemTimeToFileTime(&st, &ft); |
---|
1085 | t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime); |
---|
1086 | |
---|
1087 | if (ptime != NULL) { |
---|
1088 | *ptime = t; |
---|
1089 | } |
---|
1090 | |
---|
1091 | return t; |
---|
1092 | } |
---|
1093 | |
---|
1094 | static struct tm *localtime(const time_t *ptime, struct tm *ptm) { |
---|
1095 | int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF; |
---|
1096 | FILETIME ft, lft; |
---|
1097 | SYSTEMTIME st; |
---|
1098 | TIME_ZONE_INFORMATION tzinfo; |
---|
1099 | |
---|
1100 | if (ptm == NULL) { |
---|
1101 | return NULL; |
---|
1102 | } |
---|
1103 | |
---|
1104 | * (int64_t *) &ft = t; |
---|
1105 | FileTimeToLocalFileTime(&ft, &lft); |
---|
1106 | FileTimeToSystemTime(&lft, &st); |
---|
1107 | ptm->tm_year = st.wYear - 1900; |
---|
1108 | ptm->tm_mon = st.wMonth - 1; |
---|
1109 | ptm->tm_wday = st.wDayOfWeek; |
---|
1110 | ptm->tm_mday = st.wDay; |
---|
1111 | ptm->tm_hour = st.wHour; |
---|
1112 | ptm->tm_min = st.wMinute; |
---|
1113 | ptm->tm_sec = st.wSecond; |
---|
1114 | ptm->tm_yday = 0; // hope nobody uses this |
---|
1115 | ptm->tm_isdst = |
---|
1116 | GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0; |
---|
1117 | |
---|
1118 | return ptm; |
---|
1119 | } |
---|
1120 | |
---|
1121 | static struct tm *gmtime(const time_t *ptime, struct tm *ptm) { |
---|
1122 | // FIXME(lsm): fix this. |
---|
1123 | return localtime(ptime, ptm); |
---|
1124 | } |
---|
1125 | |
---|
1126 | static size_t strftime(char *dst, size_t dst_size, const char *fmt, |
---|
1127 | const struct tm *tm) { |
---|
1128 | (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); |
---|
1129 | return 0; |
---|
1130 | } |
---|
1131 | #endif |
---|
1132 | |
---|
1133 | // Windows happily opens files with some garbage at the end of file name. |
---|
1134 | // For example, fopen("a.cgi ", "r") on Windows successfully opens |
---|
1135 | // "a.cgi", despite one would expect an error back. |
---|
1136 | // This function returns non-0 if path ends with some garbage. |
---|
1137 | static int path_cannot_disclose_cgi(const char *path) { |
---|
1138 | static const char *allowed_last_characters = "_-"; |
---|
1139 | int last = path[strlen(path) - 1]; |
---|
1140 | return isalnum(last) || strchr(allowed_last_characters, last) != NULL; |
---|
1141 | } |
---|
1142 | |
---|
1143 | static int mg_stat(struct mg_connection *conn, const char *path, |
---|
1144 | struct file *filep) { |
---|
1145 | wchar_t wbuf[PATH_MAX]; |
---|
1146 | WIN32_FILE_ATTRIBUTE_DATA info; |
---|
1147 | |
---|
1148 | if (!is_file_in_memory(conn, path, filep)) { |
---|
1149 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1150 | if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { |
---|
1151 | filep->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); |
---|
1152 | filep->modification_time = SYS2UNIX_TIME( |
---|
1153 | info.ftLastWriteTime.dwLowDateTime, |
---|
1154 | info.ftLastWriteTime.dwHighDateTime); |
---|
1155 | filep->is_directory = info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; |
---|
1156 | // If file name is fishy, reset the file structure and return error. |
---|
1157 | // Note it is important to reset, not just return the error, cause |
---|
1158 | // functions like is_file_opened() check the struct. |
---|
1159 | if (!filep->is_directory && !path_cannot_disclose_cgi(path)) { |
---|
1160 | memset(filep, 0, sizeof(*filep)); |
---|
1161 | } |
---|
1162 | } |
---|
1163 | } |
---|
1164 | |
---|
1165 | return filep->membuf != NULL || filep->modification_time != 0; |
---|
1166 | } |
---|
1167 | |
---|
1168 | static int mg_remove(const char *path) { |
---|
1169 | wchar_t wbuf[PATH_MAX]; |
---|
1170 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1171 | return DeleteFileW(wbuf) ? 0 : -1; |
---|
1172 | } |
---|
1173 | |
---|
1174 | static int mg_mkdir(const char *path, int mode) { |
---|
1175 | char buf[PATH_MAX]; |
---|
1176 | wchar_t wbuf[PATH_MAX]; |
---|
1177 | |
---|
1178 | (void) mode; |
---|
1179 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
1180 | change_slashes_to_backslashes(buf); |
---|
1181 | |
---|
1182 | (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, ARRAY_SIZE(wbuf)); |
---|
1183 | |
---|
1184 | return CreateDirectoryW(wbuf, NULL) ? 0 : -1; |
---|
1185 | } |
---|
1186 | |
---|
1187 | // Implementation of POSIX opendir/closedir/readdir for Windows. |
---|
1188 | static DIR * opendir(const char *name) { |
---|
1189 | DIR *dir = NULL; |
---|
1190 | wchar_t wpath[PATH_MAX]; |
---|
1191 | DWORD attrs; |
---|
1192 | |
---|
1193 | if (name == NULL) { |
---|
1194 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1195 | } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { |
---|
1196 | SetLastError(ERROR_NOT_ENOUGH_MEMORY); |
---|
1197 | } else { |
---|
1198 | to_unicode(name, wpath, ARRAY_SIZE(wpath)); |
---|
1199 | attrs = GetFileAttributesW(wpath); |
---|
1200 | if (attrs != 0xFFFFFFFF && |
---|
1201 | ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { |
---|
1202 | (void) wcscat(wpath, L"\\*"); |
---|
1203 | dir->handle = FindFirstFileW(wpath, &dir->info); |
---|
1204 | dir->result.d_name[0] = '\0'; |
---|
1205 | } else { |
---|
1206 | free(dir); |
---|
1207 | dir = NULL; |
---|
1208 | } |
---|
1209 | } |
---|
1210 | |
---|
1211 | return dir; |
---|
1212 | } |
---|
1213 | |
---|
1214 | static int closedir(DIR *dir) { |
---|
1215 | int result = 0; |
---|
1216 | |
---|
1217 | if (dir != NULL) { |
---|
1218 | if (dir->handle != INVALID_HANDLE_VALUE) |
---|
1219 | result = FindClose(dir->handle) ? 0 : -1; |
---|
1220 | |
---|
1221 | free(dir); |
---|
1222 | } else { |
---|
1223 | result = -1; |
---|
1224 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1225 | } |
---|
1226 | |
---|
1227 | return result; |
---|
1228 | } |
---|
1229 | |
---|
1230 | static struct dirent *readdir(DIR *dir) { |
---|
1231 | struct dirent *result = 0; |
---|
1232 | |
---|
1233 | if (dir) { |
---|
1234 | if (dir->handle != INVALID_HANDLE_VALUE) { |
---|
1235 | result = &dir->result; |
---|
1236 | (void) WideCharToMultiByte(CP_UTF8, 0, |
---|
1237 | dir->info.cFileName, -1, result->d_name, |
---|
1238 | sizeof(result->d_name), NULL, NULL); |
---|
1239 | |
---|
1240 | if (!FindNextFileW(dir->handle, &dir->info)) { |
---|
1241 | (void) FindClose(dir->handle); |
---|
1242 | dir->handle = INVALID_HANDLE_VALUE; |
---|
1243 | } |
---|
1244 | |
---|
1245 | } else { |
---|
1246 | SetLastError(ERROR_FILE_NOT_FOUND); |
---|
1247 | } |
---|
1248 | } else { |
---|
1249 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1250 | } |
---|
1251 | |
---|
1252 | return result; |
---|
1253 | } |
---|
1254 | |
---|
1255 | static void set_close_on_exec(SOCKET sock) { |
---|
1256 | (void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0); |
---|
1257 | } |
---|
1258 | |
---|
1259 | int mg_start_thread(mg_thread_func_t f, void *p) { |
---|
1260 | return (long)_beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0; |
---|
1261 | } |
---|
1262 | |
---|
1263 | static HANDLE dlopen(const char *dll_name, int flags) { |
---|
1264 | wchar_t wbuf[PATH_MAX]; |
---|
1265 | (void) flags; |
---|
1266 | to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); |
---|
1267 | return LoadLibraryW(wbuf); |
---|
1268 | } |
---|
1269 | |
---|
1270 | #if !defined(NO_CGI) |
---|
1271 | #define SIGKILL 0 |
---|
1272 | static int kill(pid_t pid, int sig_num) { |
---|
1273 | (void) TerminateProcess(pid, sig_num); |
---|
1274 | (void) CloseHandle(pid); |
---|
1275 | return 0; |
---|
1276 | } |
---|
1277 | |
---|
1278 | static void trim_trailing_whitespaces(char *s) { |
---|
1279 | char *e = s + strlen(s) - 1; |
---|
1280 | while (e > s && isspace(* (unsigned char *) e)) { |
---|
1281 | *e-- = '\0'; |
---|
1282 | } |
---|
1283 | } |
---|
1284 | |
---|
1285 | static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
---|
1286 | char *envblk, char *envp[], int fdin, |
---|
1287 | int fdout, const char *dir) { |
---|
1288 | HANDLE me; |
---|
1289 | char *p, *interp, full_interp[PATH_MAX], full_dir[PATH_MAX], |
---|
1290 | cmdline[PATH_MAX], buf[PATH_MAX]; |
---|
1291 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
1292 | STARTUPINFOA si; |
---|
1293 | PROCESS_INFORMATION pi = { 0 }; |
---|
1294 | |
---|
1295 | (void) envp; |
---|
1296 | |
---|
1297 | memset(&si, 0, sizeof(si)); |
---|
1298 | si.cb = sizeof(si); |
---|
1299 | |
---|
1300 | // TODO(lsm): redirect CGI errors to the error log file |
---|
1301 | si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
---|
1302 | si.wShowWindow = SW_HIDE; |
---|
1303 | |
---|
1304 | me = GetCurrentProcess(); |
---|
1305 | DuplicateHandle(me, (HANDLE) _get_osfhandle(fdin), me, |
---|
1306 | &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
1307 | DuplicateHandle(me, (HANDLE) _get_osfhandle(fdout), me, |
---|
1308 | &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
1309 | |
---|
1310 | // If CGI file is a script, try to read the interpreter line |
---|
1311 | interp = conn->ctx->config[CGI_INTERPRETER]; |
---|
1312 | if (interp == NULL) { |
---|
1313 | buf[0] = buf[1] = '\0'; |
---|
1314 | |
---|
1315 | // Read the first line of the script into the buffer |
---|
1316 | snprintf(cmdline, sizeof(cmdline), "%s%c%s", dir, '/', prog); |
---|
1317 | if (mg_fopen(conn, cmdline, "r", &file)) { |
---|
1318 | p = (char *) file.membuf; |
---|
1319 | mg_fgets(buf, sizeof(buf), &file, &p); |
---|
1320 | mg_fclose(&file); |
---|
1321 | buf[sizeof(buf) - 1] = '\0'; |
---|
1322 | } |
---|
1323 | |
---|
1324 | if (buf[0] == '#' && buf[1] == '!') { |
---|
1325 | trim_trailing_whitespaces(buf + 2); |
---|
1326 | } else { |
---|
1327 | buf[2] = '\0'; |
---|
1328 | } |
---|
1329 | interp = buf + 2; |
---|
1330 | } |
---|
1331 | |
---|
1332 | if (interp[0] != '\0') { |
---|
1333 | GetFullPathNameA(interp, sizeof(full_interp), full_interp, NULL); |
---|
1334 | interp = full_interp; |
---|
1335 | } |
---|
1336 | GetFullPathNameA(dir, sizeof(full_dir), full_dir, NULL); |
---|
1337 | |
---|
1338 | mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s\"%s\\%s\"", |
---|
1339 | interp, interp[0] == '\0' ? "" : " ", full_dir, prog); |
---|
1340 | |
---|
1341 | DEBUG_TRACE(("Running [%s]", cmdline)); |
---|
1342 | if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, |
---|
1343 | CREATE_NEW_PROCESS_GROUP, envblk, NULL, &si, &pi) == 0) { |
---|
1344 | cry(conn, "%s: CreateProcess(%s): %ld", |
---|
1345 | __func__, cmdline, ERRNO); |
---|
1346 | pi.hProcess = (pid_t) -1; |
---|
1347 | } |
---|
1348 | |
---|
1349 | (void) CloseHandle(si.hStdOutput); |
---|
1350 | (void) CloseHandle(si.hStdInput); |
---|
1351 | (void) CloseHandle(pi.hThread); |
---|
1352 | |
---|
1353 | return (pid_t) pi.hProcess; |
---|
1354 | } |
---|
1355 | #endif // !NO_CGI |
---|
1356 | |
---|
1357 | static int set_non_blocking_mode(SOCKET sock) { |
---|
1358 | unsigned long on = 1; |
---|
1359 | return ioctlsocket(sock, FIONBIO, &on); |
---|
1360 | } |
---|
1361 | |
---|
1362 | #else |
---|
1363 | static int mg_stat(struct mg_connection *conn, const char *path, |
---|
1364 | struct file *filep) { |
---|
1365 | struct stat st; |
---|
1366 | |
---|
1367 | if (!is_file_in_memory(conn, path, filep) && !stat(path, &st)) { |
---|
1368 | filep->size = st.st_size; |
---|
1369 | filep->modification_time = st.st_mtime; |
---|
1370 | filep->is_directory = S_ISDIR(st.st_mode); |
---|
1371 | } else { |
---|
1372 | filep->modification_time = (time_t) 0; |
---|
1373 | } |
---|
1374 | |
---|
1375 | return filep->membuf != NULL || filep->modification_time != (time_t) 0; |
---|
1376 | } |
---|
1377 | |
---|
1378 | static void set_close_on_exec(int fd) { |
---|
1379 | fcntl(fd, F_SETFD, FD_CLOEXEC); |
---|
1380 | } |
---|
1381 | |
---|
1382 | int mg_start_thread(mg_thread_func_t func, void *param) { |
---|
1383 | pthread_t thread_id; |
---|
1384 | pthread_attr_t attr; |
---|
1385 | int result; |
---|
1386 | struct mg_context* ctx = param; |
---|
1387 | char* stacksize = ctx->config[THREAD_STACK_SIZE]; |
---|
1388 | char* priority = ctx->config[THREAD_PRIORITY]; |
---|
1389 | char* policy = ctx->config[THREAD_POLICY]; |
---|
1390 | int noinheritsched = 0; |
---|
1391 | |
---|
1392 | (void) pthread_attr_init(&attr); |
---|
1393 | (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
---|
1394 | |
---|
1395 | #if USE_STACK_SIZE > 1 |
---|
1396 | // Compile-time option to control stack size, e.g. -DUSE_STACK_SIZE=16384; Can be overridden |
---|
1397 | if (stacksize == NULL) |
---|
1398 | (void) pthread_attr_setstacksize(&attr, USE_STACK_SIZE); |
---|
1399 | #endif |
---|
1400 | |
---|
1401 | if (stacksize != NULL) { |
---|
1402 | size_t size = atoi(stacksize); |
---|
1403 | (void) pthread_attr_setstacksize(&attr, size); |
---|
1404 | } |
---|
1405 | |
---|
1406 | if (priority != NULL) { |
---|
1407 | struct sched_param sched_param; |
---|
1408 | memset(&sched_param, 0, sizeof(sched_param)); |
---|
1409 | sched_param.sched_priority = atoi(priority); |
---|
1410 | (void) pthread_attr_setschedparam(&attr, &sched_param); |
---|
1411 | noinheritsched = 1; |
---|
1412 | } |
---|
1413 | |
---|
1414 | if (policy != NULL) { |
---|
1415 | int p_policy; |
---|
1416 | (void) pthread_attr_getschedpolicy(&attr, &p_policy); |
---|
1417 | |
---|
1418 | switch (policy[0]) { |
---|
1419 | case 'o': |
---|
1420 | p_policy = SCHED_OTHER; |
---|
1421 | break; |
---|
1422 | case 'f': |
---|
1423 | p_policy = SCHED_FIFO; |
---|
1424 | break; |
---|
1425 | case 'r': |
---|
1426 | p_policy = SCHED_RR; |
---|
1427 | break; |
---|
1428 | #if defined(_POSIX_SPORADIC_SERVER) || defined(_POSIX_THREAD_SPORADIC_SERVER) |
---|
1429 | case 's': |
---|
1430 | p_policy = SCHED_SPORADIC; |
---|
1431 | break; |
---|
1432 | #endif |
---|
1433 | default: |
---|
1434 | cry(fc(ctx), "%s: Unknown scheduler: %s", __func__, policy); |
---|
1435 | break; |
---|
1436 | } |
---|
1437 | |
---|
1438 | (void) pthread_attr_setschedpolicy(&attr, p_policy); |
---|
1439 | |
---|
1440 | noinheritsched = 1; |
---|
1441 | } |
---|
1442 | |
---|
1443 | if (noinheritsched != 0) { |
---|
1444 | (void) pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED); |
---|
1445 | } |
---|
1446 | |
---|
1447 | result = pthread_create(&thread_id, &attr, func, param); |
---|
1448 | pthread_attr_destroy(&attr); |
---|
1449 | |
---|
1450 | return result; |
---|
1451 | } |
---|
1452 | |
---|
1453 | #ifndef NO_CGI |
---|
1454 | static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
---|
1455 | char *envblk, char *envp[], int fdin, |
---|
1456 | int fdout, const char *dir) { |
---|
1457 | pid_t pid; |
---|
1458 | const char *interp; |
---|
1459 | |
---|
1460 | (void) envblk; |
---|
1461 | |
---|
1462 | if ((pid = fork()) == -1) { |
---|
1463 | // Parent |
---|
1464 | send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO)); |
---|
1465 | } else if (pid == 0) { |
---|
1466 | // Child |
---|
1467 | if (chdir(dir) != 0) { |
---|
1468 | cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO)); |
---|
1469 | } else if (dup2(fdin, 0) == -1) { |
---|
1470 | cry(conn, "%s: dup2(%d, 0): %s", __func__, fdin, strerror(ERRNO)); |
---|
1471 | } else if (dup2(fdout, 1) == -1) { |
---|
1472 | cry(conn, "%s: dup2(%d, 1): %s", __func__, fdout, strerror(ERRNO)); |
---|
1473 | } else { |
---|
1474 | // Not redirecting stderr to stdout, to avoid output being littered |
---|
1475 | // with the error messages. |
---|
1476 | (void) close(fdin); |
---|
1477 | (void) close(fdout); |
---|
1478 | |
---|
1479 | // After exec, all signal handlers are restored to their default values, |
---|
1480 | // with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's |
---|
1481 | // implementation, SIGCHLD's handler will leave unchanged after exec |
---|
1482 | // if it was set to be ignored. Restore it to default action. |
---|
1483 | signal(SIGCHLD, SIG_DFL); |
---|
1484 | |
---|
1485 | interp = conn->ctx->config[CGI_INTERPRETER]; |
---|
1486 | if (interp == NULL) { |
---|
1487 | (void) execle(prog, prog, NULL, envp); |
---|
1488 | cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO)); |
---|
1489 | } else { |
---|
1490 | (void) execle(interp, interp, prog, NULL, envp); |
---|
1491 | cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog, |
---|
1492 | strerror(ERRNO)); |
---|
1493 | } |
---|
1494 | } |
---|
1495 | exit(EXIT_FAILURE); |
---|
1496 | } |
---|
1497 | |
---|
1498 | return pid; |
---|
1499 | } |
---|
1500 | #endif // !NO_CGI |
---|
1501 | |
---|
1502 | static int set_non_blocking_mode(SOCKET sock) { |
---|
1503 | int flags; |
---|
1504 | |
---|
1505 | flags = fcntl(sock, F_GETFL, 0); |
---|
1506 | (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK); |
---|
1507 | |
---|
1508 | return 0; |
---|
1509 | } |
---|
1510 | #endif // _WIN32 |
---|
1511 | |
---|
1512 | #ifndef HAVE_POLL |
---|
1513 | static int poll(struct pollfd *pfd, int n, int milliseconds) { |
---|
1514 | struct timeval tv; |
---|
1515 | fd_set set; |
---|
1516 | int i, result; |
---|
1517 | SOCKET maxfd = 0; |
---|
1518 | |
---|
1519 | tv.tv_sec = milliseconds / 1000; |
---|
1520 | tv.tv_usec = (milliseconds % 1000) * 1000; |
---|
1521 | FD_ZERO(&set); |
---|
1522 | |
---|
1523 | for (i = 0; i < n; i++) { |
---|
1524 | FD_SET((SOCKET) pfd[i].fd, &set); |
---|
1525 | pfd[i].revents = 0; |
---|
1526 | |
---|
1527 | if (pfd[i].fd > maxfd) { |
---|
1528 | maxfd = pfd[i].fd; |
---|
1529 | } |
---|
1530 | } |
---|
1531 | |
---|
1532 | if ((result = select(maxfd + 1, &set, NULL, NULL, &tv)) > 0) { |
---|
1533 | for (i = 0; i < n; i++) { |
---|
1534 | if (FD_ISSET(pfd[i].fd, &set)) { |
---|
1535 | pfd[i].revents = POLLIN; |
---|
1536 | } |
---|
1537 | } |
---|
1538 | } |
---|
1539 | |
---|
1540 | return result; |
---|
1541 | } |
---|
1542 | #endif // HAVE_POLL |
---|
1543 | |
---|
1544 | // Write data to the IO channel - opened file descriptor, socket or SSL |
---|
1545 | // descriptor. Return number of bytes written. |
---|
1546 | static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, |
---|
1547 | int64_t len) { |
---|
1548 | int64_t sent; |
---|
1549 | int n, k; |
---|
1550 | |
---|
1551 | (void) ssl; // Get rid of warning |
---|
1552 | sent = 0; |
---|
1553 | while (sent < len) { |
---|
1554 | |
---|
1555 | // How many bytes we send in this iteration |
---|
1556 | k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); |
---|
1557 | |
---|
1558 | #ifndef NO_SSL |
---|
1559 | if (ssl != NULL) { |
---|
1560 | n = SSL_write(ssl, buf + sent, k); |
---|
1561 | } else |
---|
1562 | #endif |
---|
1563 | if (fp != NULL) { |
---|
1564 | n = (int) fwrite(buf + sent, 1, (size_t) k, fp); |
---|
1565 | if (ferror(fp)) |
---|
1566 | n = -1; |
---|
1567 | } else { |
---|
1568 | n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL); |
---|
1569 | } |
---|
1570 | |
---|
1571 | if (n <= 0) |
---|
1572 | break; |
---|
1573 | |
---|
1574 | sent += n; |
---|
1575 | } |
---|
1576 | |
---|
1577 | return sent; |
---|
1578 | } |
---|
1579 | |
---|
1580 | // Read from IO channel - opened file descriptor, socket, or SSL descriptor. |
---|
1581 | // Return negative value on error, or number of bytes read on success. |
---|
1582 | static int pull(FILE *fp, struct mg_connection *conn, char *buf, int len) { |
---|
1583 | int nread; |
---|
1584 | |
---|
1585 | if (fp != NULL) { |
---|
1586 | // Use read() instead of fread(), because if we're reading from the CGI |
---|
1587 | // pipe, fread() may block until IO buffer is filled up. We cannot afford |
---|
1588 | // to block and must pass all read bytes immediately to the client. |
---|
1589 | nread = read(fileno(fp), buf, (size_t) len); |
---|
1590 | #ifndef NO_SSL |
---|
1591 | } else if (conn->ssl != NULL) { |
---|
1592 | nread = SSL_read(conn->ssl, buf, len); |
---|
1593 | #endif |
---|
1594 | } else { |
---|
1595 | nread = recv(conn->client.sock, buf, (size_t) len, 0); |
---|
1596 | } |
---|
1597 | |
---|
1598 | return conn->ctx->stop_flag ? -1 : nread; |
---|
1599 | } |
---|
1600 | |
---|
1601 | static int pull_all(FILE *fp, struct mg_connection *conn, char *buf, int len) { |
---|
1602 | int n, nread = 0; |
---|
1603 | |
---|
1604 | while (len > 0 && conn->ctx->stop_flag == 0) { |
---|
1605 | n = pull(fp, conn, buf + nread, len); |
---|
1606 | if (n < 0) { |
---|
1607 | nread = n; // Propagate the error |
---|
1608 | break; |
---|
1609 | } else if (n == 0) { |
---|
1610 | break; // No more data to read |
---|
1611 | } else { |
---|
1612 | conn->consumed_content += n; |
---|
1613 | nread += n; |
---|
1614 | len -= n; |
---|
1615 | } |
---|
1616 | } |
---|
1617 | |
---|
1618 | return nread; |
---|
1619 | } |
---|
1620 | |
---|
1621 | int mg_read(struct mg_connection *conn, void *buf, size_t len) { |
---|
1622 | int n, buffered_len, nread; |
---|
1623 | const char *body; |
---|
1624 | |
---|
1625 | // If Content-Length is not set, read until socket is closed |
---|
1626 | if (conn->consumed_content == 0 && conn->content_len == 0) { |
---|
1627 | conn->content_len = INT64_MAX; |
---|
1628 | conn->must_close = 1; |
---|
1629 | } |
---|
1630 | |
---|
1631 | nread = 0; |
---|
1632 | if (conn->consumed_content < conn->content_len) { |
---|
1633 | // Adjust number of bytes to read. |
---|
1634 | int64_t to_read = conn->content_len - conn->consumed_content; |
---|
1635 | if (to_read < (int64_t) len) { |
---|
1636 | len = (size_t) to_read; |
---|
1637 | } |
---|
1638 | |
---|
1639 | // Return buffered data |
---|
1640 | body = conn->buf + conn->request_len + conn->consumed_content; |
---|
1641 | buffered_len = &conn->buf[conn->data_len] - body; |
---|
1642 | if (buffered_len > 0) { |
---|
1643 | if (len < (size_t) buffered_len) { |
---|
1644 | buffered_len = (int) len; |
---|
1645 | } |
---|
1646 | memcpy(buf, body, (size_t) buffered_len); |
---|
1647 | len -= buffered_len; |
---|
1648 | conn->consumed_content += buffered_len; |
---|
1649 | nread += buffered_len; |
---|
1650 | buf = (char *) buf + buffered_len; |
---|
1651 | } |
---|
1652 | |
---|
1653 | // We have returned all buffered data. Read new data from the remote socket. |
---|
1654 | n = pull_all(NULL, conn, (char *) buf, (int) len); |
---|
1655 | nread = n >= 0 ? nread + n : n; |
---|
1656 | } |
---|
1657 | return nread; |
---|
1658 | } |
---|
1659 | |
---|
1660 | int mg_write(struct mg_connection *conn, const void *buf, size_t len) { |
---|
1661 | time_t now; |
---|
1662 | int64_t n, total, allowed; |
---|
1663 | |
---|
1664 | if (conn->throttle > 0) { |
---|
1665 | if ((now = time(NULL)) != conn->last_throttle_time) { |
---|
1666 | conn->last_throttle_time = now; |
---|
1667 | conn->last_throttle_bytes = 0; |
---|
1668 | } |
---|
1669 | allowed = conn->throttle - conn->last_throttle_bytes; |
---|
1670 | if (allowed > (int64_t) len) { |
---|
1671 | allowed = len; |
---|
1672 | } |
---|
1673 | if ((total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
---|
1674 | (int64_t) allowed)) == allowed) { |
---|
1675 | buf = (char *) buf + total; |
---|
1676 | conn->last_throttle_bytes += total; |
---|
1677 | while (total < (int64_t) len && conn->ctx->stop_flag == 0) { |
---|
1678 | allowed = conn->throttle > (int64_t) len - total ? |
---|
1679 | (int64_t) len - total : conn->throttle; |
---|
1680 | if ((n = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
---|
1681 | (int64_t) allowed)) != allowed) { |
---|
1682 | break; |
---|
1683 | } |
---|
1684 | sleep(1); |
---|
1685 | conn->last_throttle_bytes = allowed; |
---|
1686 | conn->last_throttle_time = time(NULL); |
---|
1687 | buf = (char *) buf + n; |
---|
1688 | total += n; |
---|
1689 | } |
---|
1690 | } |
---|
1691 | } else { |
---|
1692 | total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
---|
1693 | (int64_t) len); |
---|
1694 | } |
---|
1695 | return (int) total; |
---|
1696 | } |
---|
1697 | |
---|
1698 | // Alternative alloc_vprintf() for non-compliant C runtimes |
---|
1699 | static int alloc_vprintf2(char **buf, const char *fmt, va_list ap) { |
---|
1700 | va_list ap_copy; |
---|
1701 | int size = MG_BUF_LEN; |
---|
1702 | int len = -1; |
---|
1703 | |
---|
1704 | *buf = NULL; |
---|
1705 | while (len == -1) { |
---|
1706 | if (*buf) free(*buf); |
---|
1707 | *buf = malloc(size *= 4); |
---|
1708 | if (!*buf) break; |
---|
1709 | va_copy(ap_copy, ap); |
---|
1710 | len = vsnprintf(*buf, size, fmt, ap_copy); |
---|
1711 | } |
---|
1712 | |
---|
1713 | return len; |
---|
1714 | } |
---|
1715 | |
---|
1716 | // Print message to buffer. If buffer is large enough to hold the message, |
---|
1717 | // return buffer. If buffer is to small, allocate large enough buffer on heap, |
---|
1718 | // and return allocated buffer. |
---|
1719 | static int alloc_vprintf(char **buf, size_t size, const char *fmt, va_list ap) { |
---|
1720 | va_list ap_copy; |
---|
1721 | int len; |
---|
1722 | |
---|
1723 | // Windows is not standard-compliant, and vsnprintf() returns -1 if |
---|
1724 | // buffer is too small. Also, older versions of msvcrt.dll do not have |
---|
1725 | // _vscprintf(). However, if size is 0, vsnprintf() behaves correctly. |
---|
1726 | // Therefore, we make two passes: on first pass, get required message length. |
---|
1727 | // On second pass, actually print the message. |
---|
1728 | va_copy(ap_copy, ap); |
---|
1729 | len = vsnprintf(NULL, 0, fmt, ap_copy); |
---|
1730 | |
---|
1731 | if (len < 0) { |
---|
1732 | // C runtime is not standard compliant, vsnprintf() returned -1. |
---|
1733 | // Switch to alternative code path that uses incremental allocations. |
---|
1734 | va_copy(ap_copy, ap); |
---|
1735 | len = alloc_vprintf2(buf, fmt, ap); |
---|
1736 | } else if (len > (int) size && |
---|
1737 | (size = len + 1) > 0 && |
---|
1738 | (*buf = (char *) malloc(size)) == NULL) { |
---|
1739 | len = -1; // Allocation failed, mark failure |
---|
1740 | } else { |
---|
1741 | va_copy(ap_copy, ap); |
---|
1742 | vsnprintf(*buf, size, fmt, ap_copy); |
---|
1743 | } |
---|
1744 | |
---|
1745 | return len; |
---|
1746 | } |
---|
1747 | |
---|
1748 | static int mg_vprintf(struct mg_connection *conn, const char *fmt, va_list ap) { |
---|
1749 | char mem[MG_BUF_LEN], *buf = mem; |
---|
1750 | int len; |
---|
1751 | |
---|
1752 | if ((len = alloc_vprintf(&buf, sizeof(mem), fmt, ap)) > 0) { |
---|
1753 | len = mg_write(conn, buf, (size_t) len); |
---|
1754 | } |
---|
1755 | if (buf != mem && buf != NULL) { |
---|
1756 | free(buf); |
---|
1757 | } |
---|
1758 | |
---|
1759 | return len; |
---|
1760 | } |
---|
1761 | |
---|
1762 | int mg_printf(struct mg_connection *conn, const char *fmt, ...) { |
---|
1763 | va_list ap; |
---|
1764 | va_start(ap, fmt); |
---|
1765 | return mg_vprintf(conn, fmt, ap); |
---|
1766 | } |
---|
1767 | |
---|
1768 | int mg_url_decode(const char *src, int src_len, char *dst, |
---|
1769 | int dst_len, int is_form_url_encoded) { |
---|
1770 | int i, j, a, b; |
---|
1771 | #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') |
---|
1772 | |
---|
1773 | for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { |
---|
1774 | if (src[i] == '%' && i < src_len - 2 && |
---|
1775 | isxdigit(* (const unsigned char *) (src + i + 1)) && |
---|
1776 | isxdigit(* (const unsigned char *) (src + i + 2))) { |
---|
1777 | a = tolower(* (const unsigned char *) (src + i + 1)); |
---|
1778 | b = tolower(* (const unsigned char *) (src + i + 2)); |
---|
1779 | dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); |
---|
1780 | i += 2; |
---|
1781 | } else if (is_form_url_encoded && src[i] == '+') { |
---|
1782 | dst[j] = ' '; |
---|
1783 | } else { |
---|
1784 | dst[j] = src[i]; |
---|
1785 | } |
---|
1786 | } |
---|
1787 | |
---|
1788 | dst[j] = '\0'; // Null-terminate the destination |
---|
1789 | |
---|
1790 | return i >= src_len ? j : -1; |
---|
1791 | } |
---|
1792 | |
---|
1793 | int mg_get_var(const char *data, size_t data_len, const char *name, |
---|
1794 | char *dst, size_t dst_len) { |
---|
1795 | const char *p, *e, *s; |
---|
1796 | size_t name_len; |
---|
1797 | int len; |
---|
1798 | |
---|
1799 | if (dst == NULL || dst_len == 0) { |
---|
1800 | len = -2; |
---|
1801 | } else if (data == NULL || name == NULL || data_len == 0) { |
---|
1802 | len = -1; |
---|
1803 | dst[0] = '\0'; |
---|
1804 | } else { |
---|
1805 | name_len = strlen(name); |
---|
1806 | e = data + data_len; |
---|
1807 | len = -1; |
---|
1808 | dst[0] = '\0'; |
---|
1809 | |
---|
1810 | // data is "var1=val1&var2=val2...". Find variable first |
---|
1811 | for (p = data; p + name_len < e; p++) { |
---|
1812 | if ((p == data || p[-1] == '&') && p[name_len] == '=' && |
---|
1813 | !mg_strncasecmp(name, p, name_len)) { |
---|
1814 | |
---|
1815 | // Point p to variable value |
---|
1816 | p += name_len + 1; |
---|
1817 | |
---|
1818 | // Point s to the end of the value |
---|
1819 | s = (const char *) memchr(p, '&', (size_t)(e - p)); |
---|
1820 | if (s == NULL) { |
---|
1821 | s = e; |
---|
1822 | } |
---|
1823 | assert(s >= p); |
---|
1824 | |
---|
1825 | // Decode variable into destination buffer |
---|
1826 | len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1); |
---|
1827 | |
---|
1828 | // Redirect error code from -1 to -2 (destination buffer too small). |
---|
1829 | if (len == -1) { |
---|
1830 | len = -2; |
---|
1831 | } |
---|
1832 | break; |
---|
1833 | } |
---|
1834 | } |
---|
1835 | } |
---|
1836 | |
---|
1837 | return len; |
---|
1838 | } |
---|
1839 | |
---|
1840 | int mg_get_cookie(const char *cookie_header, const char *var_name, |
---|
1841 | char *dst, size_t dst_size) { |
---|
1842 | const char *s, *p, *end; |
---|
1843 | int name_len, len = -1; |
---|
1844 | |
---|
1845 | if (dst == NULL || dst_size == 0) { |
---|
1846 | len = -2; |
---|
1847 | } else if (var_name == NULL || (s = cookie_header) == NULL) { |
---|
1848 | len = -1; |
---|
1849 | dst[0] = '\0'; |
---|
1850 | } else { |
---|
1851 | name_len = (int) strlen(var_name); |
---|
1852 | end = s + strlen(s); |
---|
1853 | dst[0] = '\0'; |
---|
1854 | |
---|
1855 | for (; (s = mg_strcasestr(s, var_name)) != NULL; s += name_len) { |
---|
1856 | if (s[name_len] == '=') { |
---|
1857 | s += name_len + 1; |
---|
1858 | if ((p = strchr(s, ' ')) == NULL) |
---|
1859 | p = end; |
---|
1860 | if (p[-1] == ';') |
---|
1861 | p--; |
---|
1862 | if (*s == '"' && p[-1] == '"' && p > s + 1) { |
---|
1863 | s++; |
---|
1864 | p--; |
---|
1865 | } |
---|
1866 | if ((size_t) (p - s) < dst_size) { |
---|
1867 | len = p - s; |
---|
1868 | mg_strlcpy(dst, s, (size_t) len + 1); |
---|
1869 | } else { |
---|
1870 | len = -3; |
---|
1871 | } |
---|
1872 | break; |
---|
1873 | } |
---|
1874 | } |
---|
1875 | } |
---|
1876 | return len; |
---|
1877 | } |
---|
1878 | |
---|
1879 | static void convert_uri_to_file_name(struct mg_connection *conn, char *buf, |
---|
1880 | size_t buf_len, struct file *filep) { |
---|
1881 | struct vec a, b; |
---|
1882 | const char *rewrite, *uri = conn->request_info.uri, |
---|
1883 | *root = conn->ctx->config[DOCUMENT_ROOT]; |
---|
1884 | char *p; |
---|
1885 | int match_len; |
---|
1886 | char gz_path[PATH_MAX]; |
---|
1887 | char const* accept_encoding; |
---|
1888 | |
---|
1889 | // Using buf_len - 1 because memmove() for PATH_INFO may shift part |
---|
1890 | // of the path one byte on the right. |
---|
1891 | // If document_root is NULL, leave the file empty. |
---|
1892 | mg_snprintf(conn, buf, buf_len - 1, "%s%s", |
---|
1893 | root == NULL ? "" : root, |
---|
1894 | root == NULL ? "" : uri); |
---|
1895 | |
---|
1896 | rewrite = conn->ctx->config[REWRITE]; |
---|
1897 | while ((rewrite = next_option(rewrite, &a, &b)) != NULL) { |
---|
1898 | if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) { |
---|
1899 | mg_snprintf(conn, buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr, |
---|
1900 | uri + match_len); |
---|
1901 | break; |
---|
1902 | } |
---|
1903 | } |
---|
1904 | |
---|
1905 | if (mg_stat(conn, buf, filep)) return; |
---|
1906 | |
---|
1907 | // if we can't find the actual file, look for the file |
---|
1908 | // with the same name but a .gz extension. If we find it, |
---|
1909 | // use that and set the gzipped flag in the file struct |
---|
1910 | // to indicate that the response need to have the content- |
---|
1911 | // encoding: gzip header |
---|
1912 | // we can only do this if the browser declares support |
---|
1913 | if ((accept_encoding = mg_get_header(conn, "Accept-Encoding")) != NULL) { |
---|
1914 | if (strstr(accept_encoding,"gzip") != NULL) { |
---|
1915 | snprintf(gz_path, sizeof(gz_path), "%s.gz", buf); |
---|
1916 | if (mg_stat(conn, gz_path, filep)) { |
---|
1917 | filep->gzipped = 1; |
---|
1918 | return; |
---|
1919 | } |
---|
1920 | } |
---|
1921 | } |
---|
1922 | |
---|
1923 | // Support PATH_INFO for CGI scripts. |
---|
1924 | for (p = buf + strlen(buf); p > buf + 1; p--) { |
---|
1925 | if (*p == '/') { |
---|
1926 | *p = '\0'; |
---|
1927 | if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
---|
1928 | strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 && |
---|
1929 | mg_stat(conn, buf, filep)) { |
---|
1930 | // Shift PATH_INFO block one character right, e.g. |
---|
1931 | // "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00" |
---|
1932 | // conn->path_info is pointing to the local variable "path" declared |
---|
1933 | // in handle_request(), so PATH_INFO is not valid after |
---|
1934 | // handle_request returns. |
---|
1935 | conn->path_info = p + 1; |
---|
1936 | memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0 |
---|
1937 | p[1] = '/'; |
---|
1938 | break; |
---|
1939 | } else { |
---|
1940 | *p = '/'; |
---|
1941 | } |
---|
1942 | } |
---|
1943 | } |
---|
1944 | } |
---|
1945 | |
---|
1946 | // Check whether full request is buffered. Return: |
---|
1947 | // -1 if request is malformed |
---|
1948 | // 0 if request is not yet fully buffered |
---|
1949 | // >0 actual request length, including last \r\n\r\n |
---|
1950 | static int get_request_len(const char *buf, int buflen) { |
---|
1951 | const char *s, *e; |
---|
1952 | int len = 0; |
---|
1953 | |
---|
1954 | for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) |
---|
1955 | // Control characters are not allowed but >=128 is. |
---|
1956 | if (!isprint(* (const unsigned char *) s) && *s != '\r' && |
---|
1957 | *s != '\n' && * (const unsigned char *) s < 128) { |
---|
1958 | len = -1; |
---|
1959 | break; // [i_a] abort scan as soon as one malformed character is found; |
---|
1960 | // don't let subsequent \r\n\r\n win us over anyhow |
---|
1961 | } else if (s[0] == '\n' && s[1] == '\n') { |
---|
1962 | len = (int) (s - buf) + 2; |
---|
1963 | } else if (s[0] == '\n' && &s[1] < e && |
---|
1964 | s[1] == '\r' && s[2] == '\n') { |
---|
1965 | len = (int) (s - buf) + 3; |
---|
1966 | } |
---|
1967 | |
---|
1968 | return len; |
---|
1969 | } |
---|
1970 | |
---|
1971 | // Convert month to the month number. Return -1 on error, or month number |
---|
1972 | static int get_month_index(const char *s) { |
---|
1973 | size_t i; |
---|
1974 | |
---|
1975 | for (i = 0; i < ARRAY_SIZE(month_names); i++) |
---|
1976 | if (!strcmp(s, month_names[i])) |
---|
1977 | return (int) i; |
---|
1978 | |
---|
1979 | return -1; |
---|
1980 | } |
---|
1981 | |
---|
1982 | static int num_leap_years(int year) { |
---|
1983 | return year / 4 - year / 100 + year / 400; |
---|
1984 | } |
---|
1985 | |
---|
1986 | // Parse UTC date-time string, and return the corresponding time_t value. |
---|
1987 | static time_t parse_date_string(const char *datetime) { |
---|
1988 | static const unsigned short days_before_month[] = { |
---|
1989 | 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 |
---|
1990 | }; |
---|
1991 | char month_str[32]; |
---|
1992 | int second, minute, hour, day, month, year, leap_days, days; |
---|
1993 | time_t result = (time_t) 0; |
---|
1994 | |
---|
1995 | if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", |
---|
1996 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
1997 | (sscanf(datetime, "%d %3s %d %d:%d:%d", |
---|
1998 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
1999 | (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", |
---|
2000 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
2001 | (sscanf(datetime, "%d-%3s-%d %d:%d:%d", |
---|
2002 | &day, month_str, &year, &hour, &minute, &second) == 6)) && |
---|
2003 | year > 1970 && |
---|
2004 | (month = get_month_index(month_str)) != -1) { |
---|
2005 | leap_days = num_leap_years(year) - num_leap_years(1970); |
---|
2006 | year -= 1970; |
---|
2007 | days = year * 365 + days_before_month[month] + (day - 1) + leap_days; |
---|
2008 | result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; |
---|
2009 | } |
---|
2010 | |
---|
2011 | return result; |
---|
2012 | } |
---|
2013 | |
---|
2014 | // Protect against directory disclosure attack by removing '..', |
---|
2015 | // excessive '/' and '\' characters |
---|
2016 | static void remove_double_dots_and_double_slashes(char *s) { |
---|
2017 | char *p = s; |
---|
2018 | |
---|
2019 | while (*s != '\0') { |
---|
2020 | *p++ = *s++; |
---|
2021 | if (s[-1] == '/' || s[-1] == '\\') { |
---|
2022 | // Skip all following slashes, backslashes and double-dots |
---|
2023 | while (s[0] != '\0') { |
---|
2024 | if (s[0] == '/' || s[0] == '\\') { |
---|
2025 | s++; |
---|
2026 | } else if (s[0] == '.' && s[1] == '.') { |
---|
2027 | s += 2; |
---|
2028 | } else { |
---|
2029 | break; |
---|
2030 | } |
---|
2031 | } |
---|
2032 | } |
---|
2033 | } |
---|
2034 | *p = '\0'; |
---|
2035 | } |
---|
2036 | |
---|
2037 | static const struct { |
---|
2038 | const char *extension; |
---|
2039 | size_t ext_len; |
---|
2040 | const char *mime_type; |
---|
2041 | } builtin_mime_types[] = { |
---|
2042 | {".html", 5, "text/html"}, |
---|
2043 | {".htm", 4, "text/html"}, |
---|
2044 | {".shtm", 5, "text/html"}, |
---|
2045 | {".shtml", 6, "text/html"}, |
---|
2046 | {".css", 4, "text/css"}, |
---|
2047 | {".js", 3, "application/x-javascript"}, |
---|
2048 | {".ico", 4, "image/x-icon"}, |
---|
2049 | {".gif", 4, "image/gif"}, |
---|
2050 | {".jpg", 4, "image/jpeg"}, |
---|
2051 | {".jpeg", 5, "image/jpeg"}, |
---|
2052 | {".png", 4, "image/png"}, |
---|
2053 | {".svg", 4, "image/svg+xml"}, |
---|
2054 | {".txt", 4, "text/plain"}, |
---|
2055 | {".torrent", 8, "application/x-bittorrent"}, |
---|
2056 | {".wav", 4, "audio/x-wav"}, |
---|
2057 | {".mp3", 4, "audio/x-mp3"}, |
---|
2058 | {".mid", 4, "audio/mid"}, |
---|
2059 | {".m3u", 4, "audio/x-mpegurl"}, |
---|
2060 | {".ogg", 4, "audio/ogg"}, |
---|
2061 | {".ram", 4, "audio/x-pn-realaudio"}, |
---|
2062 | {".xml", 4, "text/xml"}, |
---|
2063 | {".json", 5, "text/json"}, |
---|
2064 | {".xslt", 5, "application/xml"}, |
---|
2065 | {".xsl", 4, "application/xml"}, |
---|
2066 | {".ra", 3, "audio/x-pn-realaudio"}, |
---|
2067 | {".doc", 4, "application/msword"}, |
---|
2068 | {".exe", 4, "application/octet-stream"}, |
---|
2069 | {".zip", 4, "application/x-zip-compressed"}, |
---|
2070 | {".xls", 4, "application/excel"}, |
---|
2071 | {".tgz", 4, "application/x-tar-gz"}, |
---|
2072 | {".tar", 4, "application/x-tar"}, |
---|
2073 | {".gz", 3, "application/x-gunzip"}, |
---|
2074 | {".arj", 4, "application/x-arj-compressed"}, |
---|
2075 | {".rar", 4, "application/x-arj-compressed"}, |
---|
2076 | {".rtf", 4, "application/rtf"}, |
---|
2077 | {".pdf", 4, "application/pdf"}, |
---|
2078 | {".swf", 4, "application/x-shockwave-flash"}, |
---|
2079 | {".mpg", 4, "video/mpeg"}, |
---|
2080 | {".webm", 5, "video/webm"}, |
---|
2081 | {".mpeg", 5, "video/mpeg"}, |
---|
2082 | {".mov", 4, "video/quicktime"}, |
---|
2083 | {".mp4", 4, "video/mp4"}, |
---|
2084 | {".m4v", 4, "video/x-m4v"}, |
---|
2085 | {".asf", 4, "video/x-ms-asf"}, |
---|
2086 | {".avi", 4, "video/x-msvideo"}, |
---|
2087 | {".bmp", 4, "image/bmp"}, |
---|
2088 | {".ttf", 4, "application/x-font-ttf"}, |
---|
2089 | {NULL, 0, NULL} |
---|
2090 | }; |
---|
2091 | |
---|
2092 | const char *mg_get_builtin_mime_type(const char *path) { |
---|
2093 | const char *ext; |
---|
2094 | size_t i, path_len; |
---|
2095 | |
---|
2096 | path_len = strlen(path); |
---|
2097 | |
---|
2098 | for (i = 0; builtin_mime_types[i].extension != NULL; i++) { |
---|
2099 | ext = path + (path_len - builtin_mime_types[i].ext_len); |
---|
2100 | if (path_len > builtin_mime_types[i].ext_len && |
---|
2101 | mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) { |
---|
2102 | return builtin_mime_types[i].mime_type; |
---|
2103 | } |
---|
2104 | } |
---|
2105 | |
---|
2106 | return "text/plain"; |
---|
2107 | } |
---|
2108 | |
---|
2109 | // Look at the "path" extension and figure what mime type it has. |
---|
2110 | // Store mime type in the vector. |
---|
2111 | static void get_mime_type(struct mg_context *ctx, const char *path, |
---|
2112 | struct vec *vec) { |
---|
2113 | struct vec ext_vec, mime_vec; |
---|
2114 | const char *list, *ext; |
---|
2115 | size_t path_len; |
---|
2116 | |
---|
2117 | path_len = strlen(path); |
---|
2118 | |
---|
2119 | // Scan user-defined mime types first, in case user wants to |
---|
2120 | // override default mime types. |
---|
2121 | list = ctx->config[EXTRA_MIME_TYPES]; |
---|
2122 | while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { |
---|
2123 | // ext now points to the path suffix |
---|
2124 | ext = path + path_len - ext_vec.len; |
---|
2125 | if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { |
---|
2126 | *vec = mime_vec; |
---|
2127 | return; |
---|
2128 | } |
---|
2129 | } |
---|
2130 | |
---|
2131 | vec->ptr = mg_get_builtin_mime_type(path); |
---|
2132 | vec->len = strlen(vec->ptr); |
---|
2133 | } |
---|
2134 | |
---|
2135 | static int is_big_endian(void) { |
---|
2136 | static const int n = 1; |
---|
2137 | return ((char *) &n)[0] == 0; |
---|
2138 | } |
---|
2139 | |
---|
2140 | #ifndef HAVE_MD5 |
---|
2141 | typedef struct MD5Context { |
---|
2142 | uint32_t buf[4]; |
---|
2143 | uint32_t bits[2]; |
---|
2144 | unsigned char in[64]; |
---|
2145 | } MD5_CTX; |
---|
2146 | |
---|
2147 | static void byteReverse(unsigned char *buf, unsigned longs) { |
---|
2148 | uint32_t t; |
---|
2149 | |
---|
2150 | // Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN |
---|
2151 | if (is_big_endian()) { |
---|
2152 | do { |
---|
2153 | t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | |
---|
2154 | ((unsigned) buf[1] << 8 | buf[0]); |
---|
2155 | * (uint32_t *) buf = t; |
---|
2156 | buf += 4; |
---|
2157 | } while (--longs); |
---|
2158 | } |
---|
2159 | } |
---|
2160 | |
---|
2161 | #define F1(x, y, z) (z ^ (x & (y ^ z))) |
---|
2162 | #define F2(x, y, z) F1(z, x, y) |
---|
2163 | #define F3(x, y, z) (x ^ y ^ z) |
---|
2164 | #define F4(x, y, z) (y ^ (x | ~z)) |
---|
2165 | |
---|
2166 | #define MD5STEP(f, w, x, y, z, data, s) \ |
---|
2167 | ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
---|
2168 | |
---|
2169 | // Start MD5 accumulation. Set bit count to 0 and buffer to mysterious |
---|
2170 | // initialization constants. |
---|
2171 | static void MD5Init(MD5_CTX *ctx) { |
---|
2172 | ctx->buf[0] = 0x67452301; |
---|
2173 | ctx->buf[1] = 0xefcdab89; |
---|
2174 | ctx->buf[2] = 0x98badcfe; |
---|
2175 | ctx->buf[3] = 0x10325476; |
---|
2176 | |
---|
2177 | ctx->bits[0] = 0; |
---|
2178 | ctx->bits[1] = 0; |
---|
2179 | } |
---|
2180 | |
---|
2181 | static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) { |
---|
2182 | register uint32_t a, b, c, d; |
---|
2183 | |
---|
2184 | a = buf[0]; |
---|
2185 | b = buf[1]; |
---|
2186 | c = buf[2]; |
---|
2187 | d = buf[3]; |
---|
2188 | |
---|
2189 | MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); |
---|
2190 | MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); |
---|
2191 | MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); |
---|
2192 | MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); |
---|
2193 | MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); |
---|
2194 | MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); |
---|
2195 | MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); |
---|
2196 | MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); |
---|
2197 | MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); |
---|
2198 | MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); |
---|
2199 | MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
---|
2200 | MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
---|
2201 | MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); |
---|
2202 | MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); |
---|
2203 | MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); |
---|
2204 | MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); |
---|
2205 | |
---|
2206 | MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); |
---|
2207 | MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); |
---|
2208 | MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
---|
2209 | MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); |
---|
2210 | MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); |
---|
2211 | MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); |
---|
2212 | MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
---|
2213 | MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); |
---|
2214 | MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); |
---|
2215 | MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
---|
2216 | MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); |
---|
2217 | MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); |
---|
2218 | MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
---|
2219 | MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); |
---|
2220 | MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); |
---|
2221 | MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
---|
2222 | |
---|
2223 | MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); |
---|
2224 | MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); |
---|
2225 | MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
---|
2226 | MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
---|
2227 | MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); |
---|
2228 | MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); |
---|
2229 | MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); |
---|
2230 | MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
---|
2231 | MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
---|
2232 | MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); |
---|
2233 | MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); |
---|
2234 | MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); |
---|
2235 | MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); |
---|
2236 | MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
---|
2237 | MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
---|
2238 | MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); |
---|
2239 | |
---|
2240 | MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); |
---|
2241 | MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); |
---|
2242 | MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
---|
2243 | MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); |
---|
2244 | MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
---|
2245 | MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); |
---|
2246 | MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
---|
2247 | MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); |
---|
2248 | MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); |
---|
2249 | MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
---|
2250 | MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); |
---|
2251 | MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
---|
2252 | MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); |
---|
2253 | MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
---|
2254 | MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); |
---|
2255 | MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); |
---|
2256 | |
---|
2257 | buf[0] += a; |
---|
2258 | buf[1] += b; |
---|
2259 | buf[2] += c; |
---|
2260 | buf[3] += d; |
---|
2261 | } |
---|
2262 | |
---|
2263 | static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) { |
---|
2264 | uint32_t t; |
---|
2265 | |
---|
2266 | t = ctx->bits[0]; |
---|
2267 | if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) |
---|
2268 | ctx->bits[1]++; |
---|
2269 | ctx->bits[1] += len >> 29; |
---|
2270 | |
---|
2271 | t = (t >> 3) & 0x3f; |
---|
2272 | |
---|
2273 | if (t) { |
---|
2274 | unsigned char *p = (unsigned char *) ctx->in + t; |
---|
2275 | |
---|
2276 | t = 64 - t; |
---|
2277 | if (len < t) { |
---|
2278 | memcpy(p, buf, len); |
---|
2279 | return; |
---|
2280 | } |
---|
2281 | memcpy(p, buf, t); |
---|
2282 | byteReverse(ctx->in, 16); |
---|
2283 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2284 | buf += t; |
---|
2285 | len -= t; |
---|
2286 | } |
---|
2287 | |
---|
2288 | while (len >= 64) { |
---|
2289 | memcpy(ctx->in, buf, 64); |
---|
2290 | byteReverse(ctx->in, 16); |
---|
2291 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2292 | buf += 64; |
---|
2293 | len -= 64; |
---|
2294 | } |
---|
2295 | |
---|
2296 | memcpy(ctx->in, buf, len); |
---|
2297 | } |
---|
2298 | |
---|
2299 | static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) { |
---|
2300 | unsigned count; |
---|
2301 | unsigned char *p; |
---|
2302 | uint32_t *a; |
---|
2303 | |
---|
2304 | count = (ctx->bits[0] >> 3) & 0x3F; |
---|
2305 | |
---|
2306 | p = ctx->in + count; |
---|
2307 | *p++ = 0x80; |
---|
2308 | count = 64 - 1 - count; |
---|
2309 | if (count < 8) { |
---|
2310 | memset(p, 0, count); |
---|
2311 | byteReverse(ctx->in, 16); |
---|
2312 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2313 | memset(ctx->in, 0, 56); |
---|
2314 | } else { |
---|
2315 | memset(p, 0, count - 8); |
---|
2316 | } |
---|
2317 | byteReverse(ctx->in, 14); |
---|
2318 | |
---|
2319 | a = (uint32_t *)ctx->in; |
---|
2320 | a[14] = ctx->bits[0]; |
---|
2321 | a[15] = ctx->bits[1]; |
---|
2322 | |
---|
2323 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2324 | byteReverse((unsigned char *) ctx->buf, 4); |
---|
2325 | memcpy(digest, ctx->buf, 16); |
---|
2326 | memset((char *) ctx, 0, sizeof(*ctx)); |
---|
2327 | } |
---|
2328 | #endif // !HAVE_MD5 |
---|
2329 | |
---|
2330 | // Stringify binary data. Output buffer must be twice as big as input, |
---|
2331 | // because each byte takes 2 bytes in string representation |
---|
2332 | static void bin2str(char *to, const unsigned char *p, size_t len) { |
---|
2333 | static const char *hex = "0123456789abcdef"; |
---|
2334 | |
---|
2335 | for (; len--; p++) { |
---|
2336 | *to++ = hex[p[0] >> 4]; |
---|
2337 | *to++ = hex[p[0] & 0x0f]; |
---|
2338 | } |
---|
2339 | *to = '\0'; |
---|
2340 | } |
---|
2341 | |
---|
2342 | // Return stringified MD5 hash for list of strings. Buffer must be 33 bytes. |
---|
2343 | char *mg_md5(char buf[33], ...) { |
---|
2344 | unsigned char hash[16]; |
---|
2345 | const char *p; |
---|
2346 | va_list ap; |
---|
2347 | MD5_CTX ctx; |
---|
2348 | |
---|
2349 | MD5Init(&ctx); |
---|
2350 | |
---|
2351 | va_start(ap, buf); |
---|
2352 | while ((p = va_arg(ap, const char *)) != NULL) { |
---|
2353 | MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p)); |
---|
2354 | } |
---|
2355 | va_end(ap); |
---|
2356 | |
---|
2357 | MD5Final(hash, &ctx); |
---|
2358 | bin2str(buf, hash, sizeof(hash)); |
---|
2359 | return buf; |
---|
2360 | } |
---|
2361 | |
---|
2362 | // Check the user's password, return 1 if OK |
---|
2363 | static int check_password(const char *method, const char *ha1, const char *uri, |
---|
2364 | const char *nonce, const char *nc, const char *cnonce, |
---|
2365 | const char *qop, const char *response) { |
---|
2366 | char ha2[32 + 1], expected_response[32 + 1]; |
---|
2367 | |
---|
2368 | // Some of the parameters may be NULL |
---|
2369 | if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL || |
---|
2370 | qop == NULL || response == NULL) { |
---|
2371 | return 0; |
---|
2372 | } |
---|
2373 | |
---|
2374 | // NOTE(lsm): due to a bug in MSIE, we do not compare the URI |
---|
2375 | // TODO(lsm): check for authentication timeout |
---|
2376 | if (// strcmp(dig->uri, c->ouri) != 0 || |
---|
2377 | strlen(response) != 32 |
---|
2378 | // || now - strtoul(dig->nonce, NULL, 10) > 3600 |
---|
2379 | ) { |
---|
2380 | return 0; |
---|
2381 | } |
---|
2382 | |
---|
2383 | mg_md5(ha2, method, ":", uri, NULL); |
---|
2384 | mg_md5(expected_response, ha1, ":", nonce, ":", nc, |
---|
2385 | ":", cnonce, ":", qop, ":", ha2, NULL); |
---|
2386 | |
---|
2387 | return mg_strcasecmp(response, expected_response) == 0; |
---|
2388 | } |
---|
2389 | |
---|
2390 | // Use the global passwords file, if specified by auth_gpass option, |
---|
2391 | // or search for .htpasswd in the requested directory. |
---|
2392 | static void open_auth_file(struct mg_connection *conn, const char *path, |
---|
2393 | struct file *filep) { |
---|
2394 | char name[PATH_MAX]; |
---|
2395 | const char *p, *e, *gpass = conn->ctx->config[GLOBAL_PASSWORDS_FILE]; |
---|
2396 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
2397 | |
---|
2398 | if (gpass != NULL) { |
---|
2399 | // Use global passwords file |
---|
2400 | if (!mg_fopen(conn, gpass, "r", filep)) { |
---|
2401 | cry(conn, "fopen(%s): %s", gpass, strerror(ERRNO)); |
---|
2402 | } |
---|
2403 | // Important: using local struct file to test path for is_directory flag. |
---|
2404 | // If filep is used, mg_stat() makes it appear as if auth file was opened. |
---|
2405 | } else if (mg_stat(conn, path, &file) && file.is_directory) { |
---|
2406 | mg_snprintf(conn, name, sizeof(name), "%s%c%s", |
---|
2407 | path, '/', PASSWORDS_FILE_NAME); |
---|
2408 | mg_fopen(conn, name, "r", filep); |
---|
2409 | } else { |
---|
2410 | // Try to find .htpasswd in requested directory. |
---|
2411 | for (p = path, e = p + strlen(p) - 1; e > p; e--) |
---|
2412 | if (e[0] == '/') |
---|
2413 | break; |
---|
2414 | mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", |
---|
2415 | (int) (e - p), p, '/', PASSWORDS_FILE_NAME); |
---|
2416 | mg_fopen(conn, name, "r", filep); |
---|
2417 | } |
---|
2418 | } |
---|
2419 | |
---|
2420 | // Parsed Authorization header |
---|
2421 | struct ah { |
---|
2422 | char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; |
---|
2423 | }; |
---|
2424 | |
---|
2425 | // Return 1 on success. Always initializes the ah structure. |
---|
2426 | static int parse_auth_header(struct mg_connection *conn, char *buf, |
---|
2427 | size_t buf_size, struct ah *ah) { |
---|
2428 | char *name, *value, *s; |
---|
2429 | const char *auth_header; |
---|
2430 | |
---|
2431 | (void) memset(ah, 0, sizeof(*ah)); |
---|
2432 | if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || |
---|
2433 | mg_strncasecmp(auth_header, "Digest ", 7) != 0) { |
---|
2434 | return 0; |
---|
2435 | } |
---|
2436 | |
---|
2437 | // Make modifiable copy of the auth header |
---|
2438 | (void) mg_strlcpy(buf, auth_header + 7, buf_size); |
---|
2439 | s = buf; |
---|
2440 | |
---|
2441 | // Parse authorization header |
---|
2442 | for (;;) { |
---|
2443 | // Gobble initial spaces |
---|
2444 | while (isspace(* (unsigned char *) s)) { |
---|
2445 | s++; |
---|
2446 | } |
---|
2447 | name = skip_quoted(&s, "=", " ", 0); |
---|
2448 | // Value is either quote-delimited, or ends at first comma or space. |
---|
2449 | if (s[0] == '\"') { |
---|
2450 | s++; |
---|
2451 | value = skip_quoted(&s, "\"", " ", '\\'); |
---|
2452 | if (s[0] == ',') { |
---|
2453 | s++; |
---|
2454 | } |
---|
2455 | } else { |
---|
2456 | value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces |
---|
2457 | } |
---|
2458 | if (*name == '\0') { |
---|
2459 | break; |
---|
2460 | } |
---|
2461 | |
---|
2462 | if (!strcmp(name, "username")) { |
---|
2463 | ah->user = value; |
---|
2464 | } else if (!strcmp(name, "cnonce")) { |
---|
2465 | ah->cnonce = value; |
---|
2466 | } else if (!strcmp(name, "response")) { |
---|
2467 | ah->response = value; |
---|
2468 | } else if (!strcmp(name, "uri")) { |
---|
2469 | ah->uri = value; |
---|
2470 | } else if (!strcmp(name, "qop")) { |
---|
2471 | ah->qop = value; |
---|
2472 | } else if (!strcmp(name, "nc")) { |
---|
2473 | ah->nc = value; |
---|
2474 | } else if (!strcmp(name, "nonce")) { |
---|
2475 | ah->nonce = value; |
---|
2476 | } |
---|
2477 | } |
---|
2478 | |
---|
2479 | // CGI needs it as REMOTE_USER |
---|
2480 | if (ah->user != NULL) { |
---|
2481 | conn->request_info.remote_user = mg_strdup(ah->user); |
---|
2482 | } else { |
---|
2483 | return 0; |
---|
2484 | } |
---|
2485 | |
---|
2486 | return 1; |
---|
2487 | } |
---|
2488 | |
---|
2489 | static char *mg_fgets(char *buf, size_t size, struct file *filep, char **p) { |
---|
2490 | char *eof; |
---|
2491 | size_t len; |
---|
2492 | char *memend; |
---|
2493 | |
---|
2494 | if (filep->membuf != NULL && *p != NULL) { |
---|
2495 | memend = (char *) &filep->membuf[filep->size]; |
---|
2496 | eof = (char *) memchr(*p, '\n', memend - *p); // Search for \n from p till the end of stream |
---|
2497 | if (eof != NULL) { |
---|
2498 | eof += 1; // Include \n |
---|
2499 | } else { |
---|
2500 | eof = memend; // Copy remaining data |
---|
2501 | } |
---|
2502 | len = (size_t) (eof - *p) > size - 1 ? size - 1 : (size_t) (eof - *p); |
---|
2503 | memcpy(buf, *p, len); |
---|
2504 | buf[len] = '\0'; |
---|
2505 | *p += len; |
---|
2506 | return len ? eof : NULL; |
---|
2507 | } else if (filep->fp != NULL) { |
---|
2508 | return fgets(buf, size, filep->fp); |
---|
2509 | } else { |
---|
2510 | return NULL; |
---|
2511 | } |
---|
2512 | } |
---|
2513 | |
---|
2514 | // Authorize against the opened passwords file. Return 1 if authorized. |
---|
2515 | static int authorize(struct mg_connection *conn, struct file *filep) { |
---|
2516 | struct ah ah; |
---|
2517 | char line[256], f_user[256], ha1[256], f_domain[256], buf[MG_BUF_LEN], *p; |
---|
2518 | |
---|
2519 | if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) { |
---|
2520 | return 0; |
---|
2521 | } |
---|
2522 | |
---|
2523 | // Loop over passwords file |
---|
2524 | p = (char *) filep->membuf; |
---|
2525 | while (mg_fgets(line, sizeof(line), filep, &p) != NULL) { |
---|
2526 | if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) { |
---|
2527 | continue; |
---|
2528 | } |
---|
2529 | |
---|
2530 | if (!strcmp(ah.user, f_user) && |
---|
2531 | !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain)) |
---|
2532 | return check_password(conn->request_info.request_method, ha1, ah.uri, |
---|
2533 | ah.nonce, ah.nc, ah.cnonce, ah.qop, ah.response); |
---|
2534 | } |
---|
2535 | |
---|
2536 | return 0; |
---|
2537 | } |
---|
2538 | |
---|
2539 | // Return 1 if request is authorised, 0 otherwise. |
---|
2540 | static int check_authorization(struct mg_connection *conn, const char *path) { |
---|
2541 | char fname[PATH_MAX]; |
---|
2542 | struct vec uri_vec, filename_vec; |
---|
2543 | const char *list; |
---|
2544 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
2545 | int authorized = 1; |
---|
2546 | |
---|
2547 | list = conn->ctx->config[PROTECT_URI]; |
---|
2548 | while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { |
---|
2549 | if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { |
---|
2550 | mg_snprintf(conn, fname, sizeof(fname), "%.*s", |
---|
2551 | (int) filename_vec.len, filename_vec.ptr); |
---|
2552 | if (!mg_fopen(conn, fname, "r", &file)) { |
---|
2553 | cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno)); |
---|
2554 | } |
---|
2555 | break; |
---|
2556 | } |
---|
2557 | } |
---|
2558 | |
---|
2559 | if (!is_file_opened(&file)) { |
---|
2560 | open_auth_file(conn, path, &file); |
---|
2561 | } |
---|
2562 | |
---|
2563 | if (is_file_opened(&file)) { |
---|
2564 | authorized = authorize(conn, &file); |
---|
2565 | mg_fclose(&file); |
---|
2566 | } |
---|
2567 | |
---|
2568 | return authorized; |
---|
2569 | } |
---|
2570 | |
---|
2571 | static void send_authorization_request(struct mg_connection *conn) { |
---|
2572 | conn->status_code = 401; |
---|
2573 | mg_printf(conn, |
---|
2574 | "HTTP/1.1 401 Unauthorized\r\n" |
---|
2575 | "Content-Length: 0\r\n" |
---|
2576 | "WWW-Authenticate: Digest qop=\"auth\", " |
---|
2577 | "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", |
---|
2578 | conn->ctx->config[AUTHENTICATION_DOMAIN], |
---|
2579 | (unsigned long) time(NULL)); |
---|
2580 | } |
---|
2581 | |
---|
2582 | static int is_authorized_for_put(struct mg_connection *conn) { |
---|
2583 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
2584 | const char *passfile = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE]; |
---|
2585 | int ret = 0; |
---|
2586 | |
---|
2587 | if (passfile != NULL && mg_fopen(conn, passfile, "r", &file)) { |
---|
2588 | ret = authorize(conn, &file); |
---|
2589 | mg_fclose(&file); |
---|
2590 | } |
---|
2591 | |
---|
2592 | return ret; |
---|
2593 | } |
---|
2594 | |
---|
2595 | int mg_modify_passwords_file(const char *fname, const char *domain, |
---|
2596 | const char *user, const char *pass) { |
---|
2597 | int found; |
---|
2598 | char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX]; |
---|
2599 | FILE *fp, *fp2; |
---|
2600 | |
---|
2601 | found = 0; |
---|
2602 | fp = fp2 = NULL; |
---|
2603 | |
---|
2604 | // Regard empty password as no password - remove user record. |
---|
2605 | if (pass != NULL && pass[0] == '\0') { |
---|
2606 | pass = NULL; |
---|
2607 | } |
---|
2608 | |
---|
2609 | (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); |
---|
2610 | |
---|
2611 | // Create the file if does not exist |
---|
2612 | if ((fp = fopen(fname, "a+")) != NULL) { |
---|
2613 | (void) fclose(fp); |
---|
2614 | } |
---|
2615 | |
---|
2616 | // Open the given file and temporary file |
---|
2617 | if ((fp = fopen(fname, "r")) == NULL) { |
---|
2618 | return 0; |
---|
2619 | } else if ((fp2 = fopen(tmp, "w+")) == NULL) { |
---|
2620 | fclose(fp); |
---|
2621 | return 0; |
---|
2622 | } |
---|
2623 | |
---|
2624 | // Copy the stuff to temporary file |
---|
2625 | while (fgets(line, sizeof(line), fp) != NULL) { |
---|
2626 | if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) { |
---|
2627 | continue; |
---|
2628 | } |
---|
2629 | |
---|
2630 | if (!strcmp(u, user) && !strcmp(d, domain)) { |
---|
2631 | found++; |
---|
2632 | if (pass != NULL) { |
---|
2633 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
2634 | fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
2635 | } |
---|
2636 | } else { |
---|
2637 | fprintf(fp2, "%s", line); |
---|
2638 | } |
---|
2639 | } |
---|
2640 | |
---|
2641 | // If new user, just add it |
---|
2642 | if (!found && pass != NULL) { |
---|
2643 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
2644 | fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
2645 | } |
---|
2646 | |
---|
2647 | // Close files |
---|
2648 | fclose(fp); |
---|
2649 | fclose(fp2); |
---|
2650 | |
---|
2651 | // Put the temp file in place of real file |
---|
2652 | remove(fname); |
---|
2653 | rename(tmp, fname); |
---|
2654 | |
---|
2655 | return 1; |
---|
2656 | } |
---|
2657 | |
---|
2658 | static SOCKET conn2(const char *host, int port, int use_ssl, |
---|
2659 | char *ebuf, size_t ebuf_len) { |
---|
2660 | struct sockaddr_in sin; |
---|
2661 | struct hostent *he; |
---|
2662 | SOCKET sock = INVALID_SOCKET; |
---|
2663 | |
---|
2664 | if (host == NULL) { |
---|
2665 | snprintf(ebuf, ebuf_len, "%s", "NULL host"); |
---|
2666 | } else if (use_ssl && SSLv23_client_method == NULL) { |
---|
2667 | snprintf(ebuf, ebuf_len, "%s", "SSL is not initialized"); |
---|
2668 | // TODO(lsm): use something threadsafe instead of gethostbyname() |
---|
2669 | } else if ((he = gethostbyname(host)) == NULL) { |
---|
2670 | snprintf(ebuf, ebuf_len, "gethostbyname(%s): %s", host, strerror(ERRNO)); |
---|
2671 | } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) { |
---|
2672 | snprintf(ebuf, ebuf_len, "socket(): %s", strerror(ERRNO)); |
---|
2673 | } else { |
---|
2674 | set_close_on_exec(sock); |
---|
2675 | sin.sin_family = AF_INET; |
---|
2676 | sin.sin_port = htons((uint16_t) port); |
---|
2677 | sin.sin_addr = * (struct in_addr *) he->h_addr_list[0]; |
---|
2678 | if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) { |
---|
2679 | snprintf(ebuf, ebuf_len, "connect(%s:%d): %s", |
---|
2680 | host, port, strerror(ERRNO)); |
---|
2681 | closesocket(sock); |
---|
2682 | sock = INVALID_SOCKET; |
---|
2683 | } |
---|
2684 | } |
---|
2685 | return sock; |
---|
2686 | } |
---|
2687 | |
---|
2688 | |
---|
2689 | |
---|
2690 | static void mg_url_encode(const char *src, char *dst, size_t dst_len) { |
---|
2691 | static const char *dont_escape = "._-$,;~()"; |
---|
2692 | static const char *hex = "0123456789abcdef"; |
---|
2693 | const char *end = dst + dst_len - 1; |
---|
2694 | |
---|
2695 | for (; *src != '\0' && dst < end; src++, dst++) { |
---|
2696 | if (isalnum(*(const unsigned char *) src) || |
---|
2697 | strchr(dont_escape, * (const unsigned char *) src) != NULL) { |
---|
2698 | *dst = *src; |
---|
2699 | } else if (dst + 2 < end) { |
---|
2700 | dst[0] = '%'; |
---|
2701 | dst[1] = hex[(* (const unsigned char *) src) >> 4]; |
---|
2702 | dst[2] = hex[(* (const unsigned char *) src) & 0xf]; |
---|
2703 | dst += 2; |
---|
2704 | } |
---|
2705 | } |
---|
2706 | |
---|
2707 | *dst = '\0'; |
---|
2708 | } |
---|
2709 | |
---|
2710 | static void print_dir_entry(struct de *de) { |
---|
2711 | char size[64], mod[64], href[PATH_MAX]; |
---|
2712 | |
---|
2713 | if (de->file.is_directory) { |
---|
2714 | mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]"); |
---|
2715 | } else { |
---|
2716 | // We use (signed) cast below because MSVC 6 compiler cannot |
---|
2717 | // convert unsigned __int64 to double. Sigh. |
---|
2718 | if (de->file.size < 1024) { |
---|
2719 | mg_snprintf(de->conn, size, sizeof(size), "%d", (int) de->file.size); |
---|
2720 | } else if (de->file.size < 0x100000) { |
---|
2721 | mg_snprintf(de->conn, size, sizeof(size), |
---|
2722 | "%.1fk", (double) de->file.size / 1024.0); |
---|
2723 | } else if (de->file.size < 0x40000000) { |
---|
2724 | mg_snprintf(de->conn, size, sizeof(size), |
---|
2725 | "%.1fM", (double) de->file.size / 1048576); |
---|
2726 | } else { |
---|
2727 | mg_snprintf(de->conn, size, sizeof(size), |
---|
2728 | "%.1fG", (double) de->file.size / 1073741824); |
---|
2729 | } |
---|
2730 | } |
---|
2731 | strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", |
---|
2732 | localtime(&de->file.modification_time)); |
---|
2733 | mg_url_encode(de->file_name, href, sizeof(href)); |
---|
2734 | de->conn->num_bytes_sent += mg_printf(de->conn, |
---|
2735 | "<tr><td><a href=\"%s%s%s\">%s%s</a></td>" |
---|
2736 | "<td> %s</td><td> %s</td></tr>\n", |
---|
2737 | de->conn->request_info.uri, href, de->file.is_directory ? "/" : "", |
---|
2738 | de->file_name, de->file.is_directory ? "/" : "", mod, size); |
---|
2739 | } |
---|
2740 | |
---|
2741 | // This function is called from send_directory() and used for |
---|
2742 | // sorting directory entries by size, or name, or modification time. |
---|
2743 | // On windows, __cdecl specification is needed in case if project is built |
---|
2744 | // with __stdcall convention. qsort always requires __cdels callback. |
---|
2745 | static int WINCDECL compare_dir_entries(const void *p1, const void *p2) { |
---|
2746 | const struct de *a = (const struct de *) p1, *b = (const struct de *) p2; |
---|
2747 | const char *query_string = a->conn->request_info.query_string; |
---|
2748 | int cmp_result = 0; |
---|
2749 | |
---|
2750 | if (query_string == NULL) { |
---|
2751 | query_string = "na"; |
---|
2752 | } |
---|
2753 | |
---|
2754 | if (a->file.is_directory && !b->file.is_directory) { |
---|
2755 | return -1; // Always put directories on top |
---|
2756 | } else if (!a->file.is_directory && b->file.is_directory) { |
---|
2757 | return 1; // Always put directories on top |
---|
2758 | } else if (*query_string == 'n') { |
---|
2759 | cmp_result = strcmp(a->file_name, b->file_name); |
---|
2760 | } else if (*query_string == 's') { |
---|
2761 | cmp_result = a->file.size == b->file.size ? 0 : |
---|
2762 | a->file.size > b->file.size ? 1 : -1; |
---|
2763 | } else if (*query_string == 'd') { |
---|
2764 | cmp_result = a->file.modification_time == b->file.modification_time ? 0 : |
---|
2765 | a->file.modification_time > b->file.modification_time ? 1 : -1; |
---|
2766 | } |
---|
2767 | |
---|
2768 | return query_string[1] == 'd' ? -cmp_result : cmp_result; |
---|
2769 | } |
---|
2770 | |
---|
2771 | static int must_hide_file(struct mg_connection *conn, const char *path) { |
---|
2772 | const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$"; |
---|
2773 | const char *pattern = conn->ctx->config[HIDE_FILES]; |
---|
2774 | return match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 || |
---|
2775 | (pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0); |
---|
2776 | } |
---|
2777 | |
---|
2778 | static int scan_directory(struct mg_connection *conn, const char *dir, |
---|
2779 | void *data, void (*cb)(struct de *, void *)) { |
---|
2780 | char path[PATH_MAX]; |
---|
2781 | struct dirent *dp; |
---|
2782 | DIR *dirp; |
---|
2783 | struct de de; |
---|
2784 | |
---|
2785 | if ((dirp = opendir(dir)) == NULL) { |
---|
2786 | return 0; |
---|
2787 | } else { |
---|
2788 | de.conn = conn; |
---|
2789 | |
---|
2790 | while ((dp = readdir(dirp)) != NULL) { |
---|
2791 | // Do not show current dir and hidden files |
---|
2792 | if (!strcmp(dp->d_name, ".") || |
---|
2793 | !strcmp(dp->d_name, "..") || |
---|
2794 | must_hide_file(conn, dp->d_name)) { |
---|
2795 | continue; |
---|
2796 | } |
---|
2797 | |
---|
2798 | mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); |
---|
2799 | |
---|
2800 | // If we don't memset stat structure to zero, mtime will have |
---|
2801 | // garbage and strftime() will segfault later on in |
---|
2802 | // print_dir_entry(). memset is required only if mg_stat() |
---|
2803 | // fails. For more details, see |
---|
2804 | // http://code.google.com/p/mongoose/issues/detail?id=79 |
---|
2805 | memset(&de.file, 0, sizeof(de.file)); |
---|
2806 | mg_stat(conn, path, &de.file); |
---|
2807 | |
---|
2808 | de.file_name = dp->d_name; |
---|
2809 | cb(&de, data); |
---|
2810 | } |
---|
2811 | (void) closedir(dirp); |
---|
2812 | } |
---|
2813 | return 1; |
---|
2814 | } |
---|
2815 | |
---|
2816 | static int remove_directory(struct mg_connection *conn, const char *dir) { |
---|
2817 | char path[PATH_MAX]; |
---|
2818 | struct dirent *dp; |
---|
2819 | DIR *dirp; |
---|
2820 | struct de de; |
---|
2821 | |
---|
2822 | if ((dirp = opendir(dir)) == NULL) { |
---|
2823 | return 0; |
---|
2824 | } else { |
---|
2825 | de.conn = conn; |
---|
2826 | |
---|
2827 | while ((dp = readdir(dirp)) != NULL) { |
---|
2828 | // Do not show current dir (but show hidden files as they will also be removed) |
---|
2829 | if (!strcmp(dp->d_name, ".") || |
---|
2830 | !strcmp(dp->d_name, "..")) { |
---|
2831 | continue; |
---|
2832 | } |
---|
2833 | |
---|
2834 | mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); |
---|
2835 | |
---|
2836 | // If we don't memset stat structure to zero, mtime will have |
---|
2837 | // garbage and strftime() will segfault later on in |
---|
2838 | // print_dir_entry(). memset is required only if mg_stat() |
---|
2839 | // fails. For more details, see |
---|
2840 | // http://code.google.com/p/mongoose/issues/detail?id=79 |
---|
2841 | memset(&de.file, 0, sizeof(de.file)); |
---|
2842 | mg_stat(conn, path, &de.file); |
---|
2843 | if(de.file.modification_time) { |
---|
2844 | if(de.file.is_directory) { |
---|
2845 | remove_directory(conn, path); |
---|
2846 | } else { |
---|
2847 | mg_remove(path); |
---|
2848 | } |
---|
2849 | } |
---|
2850 | |
---|
2851 | } |
---|
2852 | (void) closedir(dirp); |
---|
2853 | |
---|
2854 | rmdir(dir); |
---|
2855 | } |
---|
2856 | |
---|
2857 | return 1; |
---|
2858 | } |
---|
2859 | |
---|
2860 | struct dir_scan_data { |
---|
2861 | struct de *entries; |
---|
2862 | int num_entries; |
---|
2863 | int arr_size; |
---|
2864 | }; |
---|
2865 | |
---|
2866 | // Behaves like realloc(), but frees original pointer on failure |
---|
2867 | static void *realloc2(void *ptr, size_t size) { |
---|
2868 | void *new_ptr = realloc(ptr, size); |
---|
2869 | if (new_ptr == NULL) { |
---|
2870 | free(ptr); |
---|
2871 | } |
---|
2872 | return new_ptr; |
---|
2873 | } |
---|
2874 | |
---|
2875 | static void dir_scan_callback(struct de *de, void *data) { |
---|
2876 | struct dir_scan_data *dsd = (struct dir_scan_data *) data; |
---|
2877 | |
---|
2878 | if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) { |
---|
2879 | dsd->arr_size *= 2; |
---|
2880 | dsd->entries = (struct de *) realloc2(dsd->entries, dsd->arr_size * |
---|
2881 | sizeof(dsd->entries[0])); |
---|
2882 | } |
---|
2883 | if (dsd->entries == NULL) { |
---|
2884 | // TODO(lsm): propagate an error to the caller |
---|
2885 | dsd->num_entries = 0; |
---|
2886 | } else { |
---|
2887 | dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name); |
---|
2888 | dsd->entries[dsd->num_entries].file = de->file; |
---|
2889 | dsd->entries[dsd->num_entries].conn = de->conn; |
---|
2890 | dsd->num_entries++; |
---|
2891 | } |
---|
2892 | } |
---|
2893 | |
---|
2894 | static void handle_directory_request(struct mg_connection *conn, |
---|
2895 | const char *dir) { |
---|
2896 | int i, sort_direction; |
---|
2897 | struct dir_scan_data data = { NULL, 0, 128 }; |
---|
2898 | |
---|
2899 | if (!scan_directory(conn, dir, &data, dir_scan_callback)) { |
---|
2900 | send_http_error(conn, 500, "Cannot open directory", |
---|
2901 | "Error: opendir(%s): %s", dir, strerror(ERRNO)); |
---|
2902 | return; |
---|
2903 | } |
---|
2904 | |
---|
2905 | sort_direction = conn->request_info.query_string != NULL && |
---|
2906 | conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; |
---|
2907 | |
---|
2908 | conn->must_close = 1; |
---|
2909 | mg_printf(conn, "%s", |
---|
2910 | "HTTP/1.1 200 OK\r\n" |
---|
2911 | "Connection: close\r\n" |
---|
2912 | "Content-Type: text/html; charset=utf-8\r\n\r\n"); |
---|
2913 | |
---|
2914 | conn->num_bytes_sent += mg_printf(conn, |
---|
2915 | "<html><head><title>Index of %s</title>" |
---|
2916 | "<style>th {text-align: left;}</style></head>" |
---|
2917 | "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" |
---|
2918 | "<tr><th><a href=\"?n%c\">Name</a></th>" |
---|
2919 | "<th><a href=\"?d%c\">Modified</a></th>" |
---|
2920 | "<th><a href=\"?s%c\">Size</a></th></tr>" |
---|
2921 | "<tr><td colspan=\"3\"><hr></td></tr>", |
---|
2922 | conn->request_info.uri, conn->request_info.uri, |
---|
2923 | sort_direction, sort_direction, sort_direction); |
---|
2924 | |
---|
2925 | // Print first entry - link to a parent directory |
---|
2926 | conn->num_bytes_sent += mg_printf(conn, |
---|
2927 | "<tr><td><a href=\"%s%s\">%s</a></td>" |
---|
2928 | "<td> %s</td><td> %s</td></tr>\n", |
---|
2929 | conn->request_info.uri, "..", "Parent directory", "-", "-"); |
---|
2930 | |
---|
2931 | // Sort and print directory entries |
---|
2932 | qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]), |
---|
2933 | compare_dir_entries); |
---|
2934 | for (i = 0; i < data.num_entries; i++) { |
---|
2935 | print_dir_entry(&data.entries[i]); |
---|
2936 | free(data.entries[i].file_name); |
---|
2937 | } |
---|
2938 | free(data.entries); |
---|
2939 | |
---|
2940 | conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>"); |
---|
2941 | conn->status_code = 200; |
---|
2942 | } |
---|
2943 | |
---|
2944 | // Send len bytes from the opened file to the client. |
---|
2945 | static void send_file_data(struct mg_connection *conn, struct file *filep, |
---|
2946 | int64_t offset, int64_t len) { |
---|
2947 | char buf[MG_BUF_LEN]; |
---|
2948 | int to_read, num_read, num_written; |
---|
2949 | |
---|
2950 | // Sanity check the offset |
---|
2951 | offset = offset < 0 ? 0 : offset > filep->size ? filep->size : offset; |
---|
2952 | |
---|
2953 | if (len > 0 && filep->membuf != NULL && filep->size > 0) { |
---|
2954 | if (len > filep->size - offset) { |
---|
2955 | len = filep->size - offset; |
---|
2956 | } |
---|
2957 | mg_write(conn, filep->membuf + offset, (size_t) len); |
---|
2958 | } else if (len > 0 && filep->fp != NULL) { |
---|
2959 | fseeko(filep->fp, offset, SEEK_SET); |
---|
2960 | while (len > 0) { |
---|
2961 | // Calculate how much to read from the file in the buffer |
---|
2962 | to_read = sizeof(buf); |
---|
2963 | if ((int64_t) to_read > len) { |
---|
2964 | to_read = (int) len; |
---|
2965 | } |
---|
2966 | |
---|
2967 | // Read from file, exit the loop on error |
---|
2968 | if ((num_read = fread(buf, 1, (size_t) to_read, filep->fp)) <= 0) { |
---|
2969 | break; |
---|
2970 | } |
---|
2971 | |
---|
2972 | // Send read bytes to the client, exit the loop on error |
---|
2973 | if ((num_written = mg_write(conn, buf, (size_t) num_read)) != num_read) { |
---|
2974 | break; |
---|
2975 | } |
---|
2976 | |
---|
2977 | // Both read and were successful, adjust counters |
---|
2978 | conn->num_bytes_sent += num_written; |
---|
2979 | len -= num_written; |
---|
2980 | } |
---|
2981 | } |
---|
2982 | } |
---|
2983 | |
---|
2984 | static int parse_range_header(const char *header, int64_t *a, int64_t *b) { |
---|
2985 | return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); |
---|
2986 | } |
---|
2987 | |
---|
2988 | static void gmt_time_string(char *buf, size_t buf_len, time_t *t) { |
---|
2989 | strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); |
---|
2990 | } |
---|
2991 | |
---|
2992 | static void construct_etag(char *buf, size_t buf_len, |
---|
2993 | const struct file *filep) { |
---|
2994 | snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", |
---|
2995 | (unsigned long) filep->modification_time, filep->size); |
---|
2996 | } |
---|
2997 | |
---|
2998 | static void fclose_on_exec(struct file *filep) { |
---|
2999 | if (filep != NULL && filep->fp != NULL) { |
---|
3000 | #ifndef _WIN32 |
---|
3001 | fcntl(fileno(filep->fp), F_SETFD, FD_CLOEXEC); |
---|
3002 | #endif |
---|
3003 | } |
---|
3004 | } |
---|
3005 | |
---|
3006 | static void handle_file_request(struct mg_connection *conn, const char *path, |
---|
3007 | struct file *filep) { |
---|
3008 | char date[64], lm[64], etag[64], range[64]; |
---|
3009 | const char *msg = "OK", *hdr; |
---|
3010 | time_t curtime = time(NULL); |
---|
3011 | int64_t cl, r1, r2; |
---|
3012 | struct vec mime_vec; |
---|
3013 | int n; |
---|
3014 | char gz_path[PATH_MAX]; |
---|
3015 | char const* encoding = ""; |
---|
3016 | |
---|
3017 | get_mime_type(conn->ctx, path, &mime_vec); |
---|
3018 | cl = filep->size; |
---|
3019 | conn->status_code = 200; |
---|
3020 | range[0] = '\0'; |
---|
3021 | |
---|
3022 | // if this file is in fact a pre-gzipped file, rewrite its filename |
---|
3023 | // it's important to rewrite the filename after resolving |
---|
3024 | // the mime type from it, to preserve the actual file's type |
---|
3025 | if (filep->gzipped) { |
---|
3026 | snprintf(gz_path, sizeof(gz_path), "%s.gz", path); |
---|
3027 | path = gz_path; |
---|
3028 | encoding = "Content-Encoding: gzip\r\n"; |
---|
3029 | } |
---|
3030 | |
---|
3031 | if (!mg_fopen(conn, path, "rb", filep)) { |
---|
3032 | send_http_error(conn, 500, http_500_error, |
---|
3033 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
3034 | return; |
---|
3035 | } |
---|
3036 | |
---|
3037 | fclose_on_exec(filep); |
---|
3038 | |
---|
3039 | // If Range: header specified, act accordingly |
---|
3040 | r1 = r2 = 0; |
---|
3041 | hdr = mg_get_header(conn, "Range"); |
---|
3042 | if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 && |
---|
3043 | r1 >= 0 && r2 >= 0) { |
---|
3044 | // actually, range requests don't play well with a pre-gzipped |
---|
3045 | // file (since the range is specified in the uncmpressed space) |
---|
3046 | if (filep->gzipped) { |
---|
3047 | send_http_error(conn, 501, "Not Implemented", "range requests in gzipped files are not supported"); |
---|
3048 | return; |
---|
3049 | } |
---|
3050 | conn->status_code = 206; |
---|
3051 | cl = n == 2 ? (r2 > cl ? cl : r2) - r1 + 1: cl - r1; |
---|
3052 | mg_snprintf(conn, range, sizeof(range), |
---|
3053 | "Content-Range: bytes " |
---|
3054 | "%" INT64_FMT "-%" |
---|
3055 | INT64_FMT "/%" INT64_FMT "\r\n", |
---|
3056 | r1, r1 + cl - 1, filep->size); |
---|
3057 | msg = "Partial Content"; |
---|
3058 | } |
---|
3059 | |
---|
3060 | // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to |
---|
3061 | // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 |
---|
3062 | gmt_time_string(date, sizeof(date), &curtime); |
---|
3063 | gmt_time_string(lm, sizeof(lm), &filep->modification_time); |
---|
3064 | construct_etag(etag, sizeof(etag), filep); |
---|
3065 | |
---|
3066 | (void) mg_printf(conn, |
---|
3067 | "HTTP/1.1 %d %s\r\n" |
---|
3068 | "Date: %s\r\n" |
---|
3069 | "Last-Modified: %s\r\n" |
---|
3070 | "Etag: %s\r\n" |
---|
3071 | "Content-Type: %.*s\r\n" |
---|
3072 | "Content-Length: %" INT64_FMT "\r\n" |
---|
3073 | "Connection: %s\r\n" |
---|
3074 | "Accept-Ranges: bytes\r\n" |
---|
3075 | "%s%s\r\n", |
---|
3076 | conn->status_code, msg, date, lm, etag, (int) mime_vec.len, |
---|
3077 | mime_vec.ptr, cl, suggest_connection_header(conn), range, encoding); |
---|
3078 | |
---|
3079 | if (strcmp(conn->request_info.request_method, "HEAD") != 0) { |
---|
3080 | send_file_data(conn, filep, r1, cl); |
---|
3081 | } |
---|
3082 | mg_fclose(filep); |
---|
3083 | } |
---|
3084 | |
---|
3085 | void mg_send_file(struct mg_connection *conn, const char *path) { |
---|
3086 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
3087 | if (mg_stat(conn, path, &file)) { |
---|
3088 | handle_file_request(conn, path, &file); |
---|
3089 | } else { |
---|
3090 | send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
3091 | } |
---|
3092 | } |
---|
3093 | |
---|
3094 | |
---|
3095 | // Parse HTTP headers from the given buffer, advance buffer to the point |
---|
3096 | // where parsing stopped. |
---|
3097 | static void parse_http_headers(char **buf, struct mg_request_info *ri) { |
---|
3098 | int i; |
---|
3099 | |
---|
3100 | for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) { |
---|
3101 | ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0); |
---|
3102 | ri->http_headers[i].value = skip(buf, "\r\n"); |
---|
3103 | if (ri->http_headers[i].name[0] == '\0') |
---|
3104 | break; |
---|
3105 | ri->num_headers = i + 1; |
---|
3106 | } |
---|
3107 | } |
---|
3108 | |
---|
3109 | static int is_valid_http_method(const char *method) { |
---|
3110 | return !strcmp(method, "GET") || !strcmp(method, "POST") || |
---|
3111 | !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") || |
---|
3112 | !strcmp(method, "PUT") || !strcmp(method, "DELETE") || |
---|
3113 | !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND") |
---|
3114 | || !strcmp(method, "MKCOL") |
---|
3115 | ; |
---|
3116 | } |
---|
3117 | |
---|
3118 | // Parse HTTP request, fill in mg_request_info structure. |
---|
3119 | // This function modifies the buffer by NUL-terminating |
---|
3120 | // HTTP request components, header names and header values. |
---|
3121 | static int parse_http_message(char *buf, int len, struct mg_request_info *ri) { |
---|
3122 | int is_request, request_length = get_request_len(buf, len); |
---|
3123 | if (request_length > 0) { |
---|
3124 | // Reset attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port |
---|
3125 | ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL; |
---|
3126 | ri->num_headers = 0; |
---|
3127 | |
---|
3128 | buf[request_length - 1] = '\0'; |
---|
3129 | |
---|
3130 | // RFC says that all initial whitespaces should be ingored |
---|
3131 | while (*buf != '\0' && isspace(* (unsigned char *) buf)) { |
---|
3132 | buf++; |
---|
3133 | } |
---|
3134 | ri->request_method = skip(&buf, " "); |
---|
3135 | ri->uri = skip(&buf, " "); |
---|
3136 | ri->http_version = skip(&buf, "\r\n"); |
---|
3137 | |
---|
3138 | // HTTP message could be either HTTP request or HTTP response, e.g. |
---|
3139 | // "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..." |
---|
3140 | is_request = is_valid_http_method(ri->request_method); |
---|
3141 | if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) || |
---|
3142 | (!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) { |
---|
3143 | request_length = -1; |
---|
3144 | } else { |
---|
3145 | if (is_request) { |
---|
3146 | ri->http_version += 5; |
---|
3147 | } |
---|
3148 | parse_http_headers(&buf, ri); |
---|
3149 | } |
---|
3150 | } |
---|
3151 | return request_length; |
---|
3152 | } |
---|
3153 | |
---|
3154 | // Keep reading the input (either opened file descriptor fd, or socket sock, |
---|
3155 | // or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the |
---|
3156 | // buffer (which marks the end of HTTP request). Buffer buf may already |
---|
3157 | // have some data. The length of the data is stored in nread. |
---|
3158 | // Upon every read operation, increase nread by the number of bytes read. |
---|
3159 | static int read_request(FILE *fp, struct mg_connection *conn, |
---|
3160 | char *buf, int bufsiz, int *nread) { |
---|
3161 | int request_len, n = 0; |
---|
3162 | |
---|
3163 | request_len = get_request_len(buf, *nread); |
---|
3164 | while (conn->ctx->stop_flag == 0 && |
---|
3165 | *nread < bufsiz && request_len == 0 && |
---|
3166 | (n = pull(fp, conn, buf + *nread, bufsiz - *nread)) > 0) { |
---|
3167 | *nread += n; |
---|
3168 | assert(*nread <= bufsiz); |
---|
3169 | request_len = get_request_len(buf, *nread); |
---|
3170 | } |
---|
3171 | |
---|
3172 | return request_len <= 0 && n <= 0 ? -1 : request_len; |
---|
3173 | } |
---|
3174 | |
---|
3175 | // For given directory path, substitute it to valid index file. |
---|
3176 | // Return 0 if index file has been found, -1 if not found. |
---|
3177 | // If the file is found, it's stats is returned in stp. |
---|
3178 | static int substitute_index_file(struct mg_connection *conn, char *path, |
---|
3179 | size_t path_len, struct file *filep) { |
---|
3180 | const char *list = conn->ctx->config[INDEX_FILES]; |
---|
3181 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
3182 | struct vec filename_vec; |
---|
3183 | size_t n = strlen(path); |
---|
3184 | int found = 0; |
---|
3185 | |
---|
3186 | // The 'path' given to us points to the directory. Remove all trailing |
---|
3187 | // directory separator characters from the end of the path, and |
---|
3188 | // then append single directory separator character. |
---|
3189 | while (n > 0 && path[n - 1] == '/') { |
---|
3190 | n--; |
---|
3191 | } |
---|
3192 | path[n] = '/'; |
---|
3193 | |
---|
3194 | // Traverse index files list. For each entry, append it to the given |
---|
3195 | // path and see if the file exists. If it exists, break the loop |
---|
3196 | while ((list = next_option(list, &filename_vec, NULL)) != NULL) { |
---|
3197 | |
---|
3198 | // Ignore too long entries that may overflow path buffer |
---|
3199 | if (filename_vec.len > path_len - (n + 2)) |
---|
3200 | continue; |
---|
3201 | |
---|
3202 | // Prepare full path to the index file |
---|
3203 | mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1); |
---|
3204 | |
---|
3205 | // Does it exist? |
---|
3206 | if (mg_stat(conn, path, &file)) { |
---|
3207 | // Yes it does, break the loop |
---|
3208 | *filep = file; |
---|
3209 | found = 1; |
---|
3210 | break; |
---|
3211 | } |
---|
3212 | } |
---|
3213 | |
---|
3214 | // If no index file exists, restore directory path |
---|
3215 | if (!found) { |
---|
3216 | path[n] = '\0'; |
---|
3217 | } |
---|
3218 | |
---|
3219 | return found; |
---|
3220 | } |
---|
3221 | |
---|
3222 | // Return True if we should reply 304 Not Modified. |
---|
3223 | static int is_not_modified(const struct mg_connection *conn, |
---|
3224 | const struct file *filep) { |
---|
3225 | char etag[64]; |
---|
3226 | const char *ims = mg_get_header(conn, "If-Modified-Since"); |
---|
3227 | const char *inm = mg_get_header(conn, "If-None-Match"); |
---|
3228 | construct_etag(etag, sizeof(etag), filep); |
---|
3229 | return (inm != NULL && !mg_strcasecmp(etag, inm)) || |
---|
3230 | (ims != NULL && filep->modification_time <= parse_date_string(ims)); |
---|
3231 | } |
---|
3232 | |
---|
3233 | static int forward_body_data(struct mg_connection *conn, FILE *fp, |
---|
3234 | SOCKET sock, SSL *ssl) { |
---|
3235 | const char *expect, *body; |
---|
3236 | char buf[MG_BUF_LEN]; |
---|
3237 | int to_read, nread, buffered_len, success = 0; |
---|
3238 | |
---|
3239 | expect = mg_get_header(conn, "Expect"); |
---|
3240 | assert(fp != NULL); |
---|
3241 | |
---|
3242 | if (conn->content_len == -1) { |
---|
3243 | send_http_error(conn, 411, "Length Required", "%s", ""); |
---|
3244 | } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) { |
---|
3245 | send_http_error(conn, 417, "Expectation Failed", "%s", ""); |
---|
3246 | } else { |
---|
3247 | if (expect != NULL) { |
---|
3248 | (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n"); |
---|
3249 | } |
---|
3250 | |
---|
3251 | body = conn->buf + conn->request_len + conn->consumed_content; |
---|
3252 | buffered_len = &conn->buf[conn->data_len] - body; |
---|
3253 | assert(buffered_len >= 0); |
---|
3254 | assert(conn->consumed_content == 0); |
---|
3255 | |
---|
3256 | if (buffered_len > 0) { |
---|
3257 | if ((int64_t) buffered_len > conn->content_len) { |
---|
3258 | buffered_len = (int) conn->content_len; |
---|
3259 | } |
---|
3260 | push(fp, sock, ssl, body, (int64_t) buffered_len); |
---|
3261 | conn->consumed_content += buffered_len; |
---|
3262 | } |
---|
3263 | |
---|
3264 | nread = 0; |
---|
3265 | while (conn->consumed_content < conn->content_len) { |
---|
3266 | to_read = sizeof(buf); |
---|
3267 | if ((int64_t) to_read > conn->content_len - conn->consumed_content) { |
---|
3268 | to_read = (int) (conn->content_len - conn->consumed_content); |
---|
3269 | } |
---|
3270 | nread = pull(NULL, conn, buf, to_read); |
---|
3271 | if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) { |
---|
3272 | break; |
---|
3273 | } |
---|
3274 | conn->consumed_content += nread; |
---|
3275 | } |
---|
3276 | |
---|
3277 | if (conn->consumed_content == conn->content_len) { |
---|
3278 | success = nread >= 0; |
---|
3279 | } |
---|
3280 | |
---|
3281 | // Each error code path in this function must send an error |
---|
3282 | if (!success) { |
---|
3283 | send_http_error(conn, 577, http_500_error, "%s", ""); |
---|
3284 | } |
---|
3285 | } |
---|
3286 | |
---|
3287 | return success; |
---|
3288 | } |
---|
3289 | |
---|
3290 | #if !defined(NO_CGI) |
---|
3291 | // This structure helps to create an environment for the spawned CGI program. |
---|
3292 | // Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, |
---|
3293 | // last element must be NULL. |
---|
3294 | // However, on Windows there is a requirement that all these VARIABLE=VALUE\0 |
---|
3295 | // strings must reside in a contiguous buffer. The end of the buffer is |
---|
3296 | // marked by two '\0' characters. |
---|
3297 | // We satisfy both worlds: we create an envp array (which is vars), all |
---|
3298 | // entries are actually pointers inside buf. |
---|
3299 | struct cgi_env_block { |
---|
3300 | struct mg_connection *conn; |
---|
3301 | char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer |
---|
3302 | int len; // Space taken |
---|
3303 | char *vars[MAX_CGI_ENVIR_VARS]; // char **envp |
---|
3304 | int nvars; // Number of variables |
---|
3305 | }; |
---|
3306 | |
---|
3307 | static char *addenv(struct cgi_env_block *block, |
---|
3308 | PRINTF_FORMAT_STRING(const char *fmt), ...) |
---|
3309 | PRINTF_ARGS(2, 3); |
---|
3310 | |
---|
3311 | // Append VARIABLE=VALUE\0 string to the buffer, and add a respective |
---|
3312 | // pointer into the vars array. |
---|
3313 | static char *addenv(struct cgi_env_block *block, const char *fmt, ...) { |
---|
3314 | int n, space; |
---|
3315 | char *added; |
---|
3316 | va_list ap; |
---|
3317 | |
---|
3318 | // Calculate how much space is left in the buffer |
---|
3319 | space = sizeof(block->buf) - block->len - 2; |
---|
3320 | assert(space >= 0); |
---|
3321 | |
---|
3322 | // Make a pointer to the free space int the buffer |
---|
3323 | added = block->buf + block->len; |
---|
3324 | |
---|
3325 | // Copy VARIABLE=VALUE\0 string into the free space |
---|
3326 | va_start(ap, fmt); |
---|
3327 | n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap); |
---|
3328 | va_end(ap); |
---|
3329 | |
---|
3330 | // Make sure we do not overflow buffer and the envp array |
---|
3331 | if (n > 0 && n + 1 < space && |
---|
3332 | block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { |
---|
3333 | // Append a pointer to the added string into the envp array |
---|
3334 | block->vars[block->nvars++] = added; |
---|
3335 | // Bump up used length counter. Include \0 terminator |
---|
3336 | block->len += n + 1; |
---|
3337 | } else { |
---|
3338 | cry(block->conn, "%s: CGI env buffer truncated for [%s]", __func__, fmt); |
---|
3339 | } |
---|
3340 | |
---|
3341 | return added; |
---|
3342 | } |
---|
3343 | |
---|
3344 | static void prepare_cgi_environment(struct mg_connection *conn, |
---|
3345 | const char *prog, |
---|
3346 | struct cgi_env_block *blk) { |
---|
3347 | const char *s, *slash; |
---|
3348 | struct vec var_vec; |
---|
3349 | char *p, src_addr[IP_ADDR_STR_LEN]; |
---|
3350 | int i; |
---|
3351 | |
---|
3352 | blk->len = blk->nvars = 0; |
---|
3353 | blk->conn = conn; |
---|
3354 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
3355 | |
---|
3356 | addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]); |
---|
3357 | addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
---|
3358 | addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
---|
3359 | addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", mg_version()); |
---|
3360 | |
---|
3361 | // Prepare the environment block |
---|
3362 | addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); |
---|
3363 | addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); |
---|
3364 | addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP |
---|
3365 | |
---|
3366 | // TODO(lsm): fix this for IPv6 case |
---|
3367 | addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port)); |
---|
3368 | |
---|
3369 | addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method); |
---|
3370 | addenv(blk, "REMOTE_ADDR=%s", src_addr); |
---|
3371 | addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port); |
---|
3372 | addenv(blk, "REQUEST_URI=%s", conn->request_info.uri); |
---|
3373 | |
---|
3374 | // SCRIPT_NAME |
---|
3375 | assert(conn->request_info.uri[0] == '/'); |
---|
3376 | slash = strrchr(conn->request_info.uri, '/'); |
---|
3377 | if ((s = strrchr(prog, '/')) == NULL) |
---|
3378 | s = prog; |
---|
3379 | addenv(blk, "SCRIPT_NAME=%.*s%s", (int) (slash - conn->request_info.uri), |
---|
3380 | conn->request_info.uri, s); |
---|
3381 | |
---|
3382 | addenv(blk, "SCRIPT_FILENAME=%s", prog); |
---|
3383 | addenv(blk, "PATH_TRANSLATED=%s", prog); |
---|
3384 | addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on"); |
---|
3385 | |
---|
3386 | if ((s = mg_get_header(conn, "Content-Type")) != NULL) |
---|
3387 | addenv(blk, "CONTENT_TYPE=%s", s); |
---|
3388 | |
---|
3389 | if (conn->request_info.query_string != NULL) |
---|
3390 | addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string); |
---|
3391 | |
---|
3392 | if ((s = mg_get_header(conn, "Content-Length")) != NULL) |
---|
3393 | addenv(blk, "CONTENT_LENGTH=%s", s); |
---|
3394 | |
---|
3395 | if ((s = getenv("PATH")) != NULL) |
---|
3396 | addenv(blk, "PATH=%s", s); |
---|
3397 | |
---|
3398 | if (conn->path_info != NULL) { |
---|
3399 | addenv(blk, "PATH_INFO=%s", conn->path_info); |
---|
3400 | } |
---|
3401 | |
---|
3402 | #if defined(_WIN32) |
---|
3403 | if ((s = getenv("COMSPEC")) != NULL) { |
---|
3404 | addenv(blk, "COMSPEC=%s", s); |
---|
3405 | } |
---|
3406 | if ((s = getenv("SYSTEMROOT")) != NULL) { |
---|
3407 | addenv(blk, "SYSTEMROOT=%s", s); |
---|
3408 | } |
---|
3409 | if ((s = getenv("SystemDrive")) != NULL) { |
---|
3410 | addenv(blk, "SystemDrive=%s", s); |
---|
3411 | } |
---|
3412 | if ((s = getenv("ProgramFiles")) != NULL) { |
---|
3413 | addenv(blk, "ProgramFiles=%s", s); |
---|
3414 | } |
---|
3415 | if ((s = getenv("ProgramFiles(x86)")) != NULL) { |
---|
3416 | addenv(blk, "ProgramFiles(x86)=%s", s); |
---|
3417 | } |
---|
3418 | #else |
---|
3419 | if ((s = getenv("LD_LIBRARY_PATH")) != NULL) |
---|
3420 | addenv(blk, "LD_LIBRARY_PATH=%s", s); |
---|
3421 | #endif // _WIN32 |
---|
3422 | |
---|
3423 | if ((s = getenv("PERLLIB")) != NULL) |
---|
3424 | addenv(blk, "PERLLIB=%s", s); |
---|
3425 | |
---|
3426 | if (conn->request_info.remote_user != NULL) { |
---|
3427 | addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user); |
---|
3428 | addenv(blk, "%s", "AUTH_TYPE=Digest"); |
---|
3429 | } |
---|
3430 | |
---|
3431 | // Add all headers as HTTP_* variables |
---|
3432 | for (i = 0; i < conn->request_info.num_headers; i++) { |
---|
3433 | p = addenv(blk, "HTTP_%s=%s", |
---|
3434 | conn->request_info.http_headers[i].name, |
---|
3435 | conn->request_info.http_headers[i].value); |
---|
3436 | |
---|
3437 | // Convert variable name into uppercase, and change - to _ |
---|
3438 | for (; *p != '=' && *p != '\0'; p++) { |
---|
3439 | if (*p == '-') |
---|
3440 | *p = '_'; |
---|
3441 | *p = (char) toupper(* (unsigned char *) p); |
---|
3442 | } |
---|
3443 | } |
---|
3444 | |
---|
3445 | // Add user-specified variables |
---|
3446 | s = conn->ctx->config[CGI_ENVIRONMENT]; |
---|
3447 | while ((s = next_option(s, &var_vec, NULL)) != NULL) { |
---|
3448 | addenv(blk, "%.*s", (int) var_vec.len, var_vec.ptr); |
---|
3449 | } |
---|
3450 | |
---|
3451 | blk->vars[blk->nvars++] = NULL; |
---|
3452 | blk->buf[blk->len++] = '\0'; |
---|
3453 | |
---|
3454 | assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); |
---|
3455 | assert(blk->len > 0); |
---|
3456 | assert(blk->len < (int) sizeof(blk->buf)); |
---|
3457 | } |
---|
3458 | |
---|
3459 | static void handle_cgi_request(struct mg_connection *conn, const char *prog) { |
---|
3460 | int headers_len, data_len, i, fdin[2], fdout[2]; |
---|
3461 | const char *status, *status_text; |
---|
3462 | char buf[16384], *pbuf, dir[PATH_MAX], *p; |
---|
3463 | struct mg_request_info ri; |
---|
3464 | struct cgi_env_block blk; |
---|
3465 | FILE *in = NULL, *out = NULL; |
---|
3466 | struct file fout = STRUCT_FILE_INITIALIZER; |
---|
3467 | pid_t pid = (pid_t) -1; |
---|
3468 | |
---|
3469 | prepare_cgi_environment(conn, prog, &blk); |
---|
3470 | |
---|
3471 | // CGI must be executed in its own directory. 'dir' must point to the |
---|
3472 | // directory containing executable program, 'p' must point to the |
---|
3473 | // executable program name relative to 'dir'. |
---|
3474 | (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog); |
---|
3475 | if ((p = strrchr(dir, '/')) != NULL) { |
---|
3476 | *p++ = '\0'; |
---|
3477 | } else { |
---|
3478 | dir[0] = '.', dir[1] = '\0'; |
---|
3479 | p = (char *) prog; |
---|
3480 | } |
---|
3481 | |
---|
3482 | if (pipe(fdin) != 0 || pipe(fdout) != 0) { |
---|
3483 | send_http_error(conn, 500, http_500_error, |
---|
3484 | "Cannot create CGI pipe: %s", strerror(ERRNO)); |
---|
3485 | goto done; |
---|
3486 | } |
---|
3487 | |
---|
3488 | pid = spawn_process(conn, p, blk.buf, blk.vars, fdin[0], fdout[1], dir); |
---|
3489 | if (pid == (pid_t) -1) { |
---|
3490 | send_http_error(conn, 500, http_500_error, |
---|
3491 | "Cannot spawn CGI process [%s]: %s", prog, strerror(ERRNO)); |
---|
3492 | goto done; |
---|
3493 | } |
---|
3494 | |
---|
3495 | // Make sure child closes all pipe descriptors. It must dup them to 0,1 |
---|
3496 | set_close_on_exec(fdin[0]); |
---|
3497 | set_close_on_exec(fdin[1]); |
---|
3498 | set_close_on_exec(fdout[0]); |
---|
3499 | set_close_on_exec(fdout[1]); |
---|
3500 | |
---|
3501 | // Parent closes only one side of the pipes. |
---|
3502 | // If we don't mark them as closed, close() attempt before |
---|
3503 | // return from this function throws an exception on Windows. |
---|
3504 | // Windows does not like when closed descriptor is closed again. |
---|
3505 | (void) close(fdin[0]); |
---|
3506 | (void) close(fdout[1]); |
---|
3507 | fdin[0] = fdout[1] = -1; |
---|
3508 | |
---|
3509 | |
---|
3510 | if ((in = fdopen(fdin[1], "wb")) == NULL || |
---|
3511 | (out = fdopen(fdout[0], "rb")) == NULL) { |
---|
3512 | send_http_error(conn, 500, http_500_error, |
---|
3513 | "fopen: %s", strerror(ERRNO)); |
---|
3514 | goto done; |
---|
3515 | } |
---|
3516 | |
---|
3517 | setbuf(in, NULL); |
---|
3518 | setbuf(out, NULL); |
---|
3519 | fout.fp = out; |
---|
3520 | |
---|
3521 | // Send POST data to the CGI process if needed |
---|
3522 | if (!strcmp(conn->request_info.request_method, "POST") && |
---|
3523 | !forward_body_data(conn, in, INVALID_SOCKET, NULL)) { |
---|
3524 | goto done; |
---|
3525 | } |
---|
3526 | |
---|
3527 | // Close so child gets an EOF. |
---|
3528 | fclose(in); |
---|
3529 | in = NULL; |
---|
3530 | fdin[1] = -1; |
---|
3531 | |
---|
3532 | // Now read CGI reply into a buffer. We need to set correct |
---|
3533 | // status code, thus we need to see all HTTP headers first. |
---|
3534 | // Do not send anything back to client, until we buffer in all |
---|
3535 | // HTTP headers. |
---|
3536 | data_len = 0; |
---|
3537 | headers_len = read_request(out, conn, buf, sizeof(buf), &data_len); |
---|
3538 | if (headers_len <= 0) { |
---|
3539 | send_http_error(conn, 500, http_500_error, |
---|
3540 | "CGI program sent malformed or too big (>%u bytes) " |
---|
3541 | "HTTP headers: [%.*s]", |
---|
3542 | (unsigned) sizeof(buf), data_len, buf); |
---|
3543 | goto done; |
---|
3544 | } |
---|
3545 | pbuf = buf; |
---|
3546 | buf[headers_len - 1] = '\0'; |
---|
3547 | parse_http_headers(&pbuf, &ri); |
---|
3548 | |
---|
3549 | // Make up and send the status line |
---|
3550 | status_text = "OK"; |
---|
3551 | if ((status = get_header(&ri, "Status")) != NULL) { |
---|
3552 | conn->status_code = atoi(status); |
---|
3553 | status_text = status; |
---|
3554 | while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') { |
---|
3555 | status_text++; |
---|
3556 | } |
---|
3557 | } else if (get_header(&ri, "Location") != NULL) { |
---|
3558 | conn->status_code = 302; |
---|
3559 | } else { |
---|
3560 | conn->status_code = 200; |
---|
3561 | } |
---|
3562 | if (get_header(&ri, "Connection") != NULL && |
---|
3563 | !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) { |
---|
3564 | conn->must_close = 1; |
---|
3565 | } |
---|
3566 | (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->status_code, |
---|
3567 | status_text); |
---|
3568 | |
---|
3569 | // Send headers |
---|
3570 | for (i = 0; i < ri.num_headers; i++) { |
---|
3571 | mg_printf(conn, "%s: %s\r\n", |
---|
3572 | ri.http_headers[i].name, ri.http_headers[i].value); |
---|
3573 | } |
---|
3574 | mg_write(conn, "\r\n", 2); |
---|
3575 | |
---|
3576 | // Send chunk of data that may have been read after the headers |
---|
3577 | conn->num_bytes_sent += mg_write(conn, buf + headers_len, |
---|
3578 | (size_t)(data_len - headers_len)); |
---|
3579 | |
---|
3580 | // Read the rest of CGI output and send to the client |
---|
3581 | send_file_data(conn, &fout, 0, INT64_MAX); |
---|
3582 | |
---|
3583 | done: |
---|
3584 | if (pid != (pid_t) -1) { |
---|
3585 | kill(pid, SIGKILL); |
---|
3586 | } |
---|
3587 | if (fdin[0] != -1) { |
---|
3588 | close(fdin[0]); |
---|
3589 | } |
---|
3590 | if (fdout[1] != -1) { |
---|
3591 | close(fdout[1]); |
---|
3592 | } |
---|
3593 | |
---|
3594 | if (in != NULL) { |
---|
3595 | fclose(in); |
---|
3596 | } else if (fdin[1] != -1) { |
---|
3597 | close(fdin[1]); |
---|
3598 | } |
---|
3599 | |
---|
3600 | if (out != NULL) { |
---|
3601 | fclose(out); |
---|
3602 | } else if (fdout[0] != -1) { |
---|
3603 | close(fdout[0]); |
---|
3604 | } |
---|
3605 | } |
---|
3606 | #endif // !NO_CGI |
---|
3607 | |
---|
3608 | // For a given PUT path, create all intermediate subdirectories |
---|
3609 | // for given path. Return 0 if the path itself is a directory, |
---|
3610 | // or -1 on error, 1 if OK. |
---|
3611 | static int put_dir(struct mg_connection *conn, const char *path) { |
---|
3612 | char buf[PATH_MAX]; |
---|
3613 | const char *s, *p; |
---|
3614 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
3615 | int len, res = 1; |
---|
3616 | |
---|
3617 | for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) { |
---|
3618 | len = p - path; |
---|
3619 | if (len >= (int) sizeof(buf)) { |
---|
3620 | res = -1; |
---|
3621 | break; |
---|
3622 | } |
---|
3623 | memcpy(buf, path, len); |
---|
3624 | buf[len] = '\0'; |
---|
3625 | |
---|
3626 | // Try to create intermediate directory |
---|
3627 | DEBUG_TRACE(("mkdir(%s)", buf)); |
---|
3628 | if (!mg_stat(conn, buf, &file) && mg_mkdir(buf, 0755) != 0) { |
---|
3629 | res = -1; |
---|
3630 | break; |
---|
3631 | } |
---|
3632 | |
---|
3633 | // Is path itself a directory? |
---|
3634 | if (p[1] == '\0') { |
---|
3635 | res = 0; |
---|
3636 | } |
---|
3637 | } |
---|
3638 | |
---|
3639 | return res; |
---|
3640 | } |
---|
3641 | |
---|
3642 | static void mkcol(struct mg_connection *conn, const char *path) { |
---|
3643 | int rc, body_len; |
---|
3644 | struct de de; |
---|
3645 | memset(&de.file, 0, sizeof(de.file)); |
---|
3646 | mg_stat(conn, path, &de.file); |
---|
3647 | |
---|
3648 | if(de.file.modification_time) { |
---|
3649 | send_http_error(conn, 405, "Method Not Allowed", |
---|
3650 | "mkcol(%s): %s", path, strerror(ERRNO)); |
---|
3651 | return; |
---|
3652 | } |
---|
3653 | |
---|
3654 | body_len = conn->data_len - conn->request_len; |
---|
3655 | if(body_len > 0) { |
---|
3656 | send_http_error(conn, 415, "Unsupported media type", |
---|
3657 | "mkcol(%s): %s", path, strerror(ERRNO)); |
---|
3658 | return; |
---|
3659 | } |
---|
3660 | |
---|
3661 | rc = mg_mkdir(path, 0755); |
---|
3662 | |
---|
3663 | if (rc == 0) { |
---|
3664 | conn->status_code = 201; |
---|
3665 | mg_printf(conn, "HTTP/1.1 %d Created\r\n\r\n", conn->status_code); |
---|
3666 | } else if (rc == -1) { |
---|
3667 | if(errno == EEXIST) |
---|
3668 | send_http_error(conn, 405, "Method Not Allowed", |
---|
3669 | "mkcol(%s): %s", path, strerror(ERRNO)); |
---|
3670 | else if(errno == EACCES) |
---|
3671 | send_http_error(conn, 403, "Forbidden", |
---|
3672 | "mkcol(%s): %s", path, strerror(ERRNO)); |
---|
3673 | else if(errno == ENOENT) |
---|
3674 | send_http_error(conn, 409, "Conflict", |
---|
3675 | "mkcol(%s): %s", path, strerror(ERRNO)); |
---|
3676 | else |
---|
3677 | send_http_error(conn, 500, http_500_error, |
---|
3678 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
3679 | } |
---|
3680 | } |
---|
3681 | |
---|
3682 | static void put_file(struct mg_connection *conn, const char *path) { |
---|
3683 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
3684 | const char *range; |
---|
3685 | int64_t r1, r2; |
---|
3686 | int rc; |
---|
3687 | |
---|
3688 | conn->status_code = mg_stat(conn, path, &file) ? 200 : 201; |
---|
3689 | |
---|
3690 | if ((rc = put_dir(conn, path)) == 0) { |
---|
3691 | mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->status_code); |
---|
3692 | } else if (rc == -1) { |
---|
3693 | send_http_error(conn, 500, http_500_error, |
---|
3694 | "put_dir(%s): %s", path, strerror(ERRNO)); |
---|
3695 | } else if (!mg_fopen(conn, path, "wb+", &file) || file.fp == NULL) { |
---|
3696 | mg_fclose(&file); |
---|
3697 | send_http_error(conn, 500, http_500_error, |
---|
3698 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
3699 | } else { |
---|
3700 | fclose_on_exec(&file); |
---|
3701 | range = mg_get_header(conn, "Content-Range"); |
---|
3702 | r1 = r2 = 0; |
---|
3703 | if (range != NULL && parse_range_header(range, &r1, &r2) > 0) { |
---|
3704 | conn->status_code = 206; |
---|
3705 | fseeko(file.fp, r1, SEEK_SET); |
---|
3706 | } |
---|
3707 | if (!forward_body_data(conn, file.fp, INVALID_SOCKET, NULL)) { |
---|
3708 | conn->status_code = 500; |
---|
3709 | } |
---|
3710 | mg_printf(conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", |
---|
3711 | conn->status_code); |
---|
3712 | mg_fclose(&file); |
---|
3713 | } |
---|
3714 | } |
---|
3715 | |
---|
3716 | static void send_ssi_file(struct mg_connection *, const char *, |
---|
3717 | struct file *, int); |
---|
3718 | |
---|
3719 | static void do_ssi_include(struct mg_connection *conn, const char *ssi, |
---|
3720 | char *tag, int include_level) { |
---|
3721 | char file_name[MG_BUF_LEN], path[PATH_MAX], *p; |
---|
3722 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
3723 | |
---|
3724 | // sscanf() is safe here, since send_ssi_file() also uses buffer |
---|
3725 | // of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN. |
---|
3726 | if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { |
---|
3727 | // File name is relative to the webserver root |
---|
3728 | (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
---|
3729 | conn->ctx->config[DOCUMENT_ROOT], '/', file_name); |
---|
3730 | } else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) { |
---|
3731 | // File name is relative to the webserver working directory |
---|
3732 | // or it is absolute system path |
---|
3733 | (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name); |
---|
3734 | } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 || |
---|
3735 | sscanf(tag, " \"%[^\"]\"", file_name) == 1) { |
---|
3736 | // File name is relative to the currect document |
---|
3737 | (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi); |
---|
3738 | if ((p = strrchr(path, '/')) != NULL) { |
---|
3739 | p[1] = '\0'; |
---|
3740 | } |
---|
3741 | (void) mg_snprintf(conn, path + strlen(path), |
---|
3742 | sizeof(path) - strlen(path), "%s", file_name); |
---|
3743 | } else { |
---|
3744 | cry(conn, "Bad SSI #include: [%s]", tag); |
---|
3745 | return; |
---|
3746 | } |
---|
3747 | |
---|
3748 | if (!mg_fopen(conn, path, "rb", &file)) { |
---|
3749 | cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", |
---|
3750 | tag, path, strerror(ERRNO)); |
---|
3751 | } else { |
---|
3752 | fclose_on_exec(&file); |
---|
3753 | if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
---|
3754 | strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) { |
---|
3755 | send_ssi_file(conn, path, &file, include_level + 1); |
---|
3756 | } else { |
---|
3757 | send_file_data(conn, &file, 0, INT64_MAX); |
---|
3758 | } |
---|
3759 | mg_fclose(&file); |
---|
3760 | } |
---|
3761 | } |
---|
3762 | |
---|
3763 | #if !defined(NO_POPEN) |
---|
3764 | static void do_ssi_exec(struct mg_connection *conn, char *tag) { |
---|
3765 | char cmd[MG_BUF_LEN]; |
---|
3766 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
3767 | |
---|
3768 | if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { |
---|
3769 | cry(conn, "Bad SSI #exec: [%s]", tag); |
---|
3770 | } else if ((file.fp = popen(cmd, "r")) == NULL) { |
---|
3771 | cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO)); |
---|
3772 | } else { |
---|
3773 | send_file_data(conn, &file, 0, INT64_MAX); |
---|
3774 | pclose(file.fp); |
---|
3775 | } |
---|
3776 | } |
---|
3777 | #endif // !NO_POPEN |
---|
3778 | |
---|
3779 | static int mg_fgetc(struct file *filep, int offset) { |
---|
3780 | if (filep->membuf != NULL && offset >=0 && offset < filep->size) { |
---|
3781 | return ((unsigned char *) filep->membuf)[offset]; |
---|
3782 | } else if (filep->fp != NULL) { |
---|
3783 | return fgetc(filep->fp); |
---|
3784 | } else { |
---|
3785 | return EOF; |
---|
3786 | } |
---|
3787 | } |
---|
3788 | |
---|
3789 | static void send_ssi_file(struct mg_connection *conn, const char *path, |
---|
3790 | struct file *filep, int include_level) { |
---|
3791 | char buf[MG_BUF_LEN]; |
---|
3792 | int ch, offset, len, in_ssi_tag; |
---|
3793 | |
---|
3794 | if (include_level > 10) { |
---|
3795 | cry(conn, "SSI #include level is too deep (%s)", path); |
---|
3796 | return; |
---|
3797 | } |
---|
3798 | |
---|
3799 | in_ssi_tag = len = offset = 0; |
---|
3800 | while ((ch = mg_fgetc(filep, offset)) != EOF) { |
---|
3801 | if (in_ssi_tag && ch == '>') { |
---|
3802 | in_ssi_tag = 0; |
---|
3803 | buf[len++] = (char) ch; |
---|
3804 | buf[len] = '\0'; |
---|
3805 | assert(len <= (int) sizeof(buf)); |
---|
3806 | if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { |
---|
3807 | // Not an SSI tag, pass it |
---|
3808 | (void) mg_write(conn, buf, (size_t) len); |
---|
3809 | } else { |
---|
3810 | if (!memcmp(buf + 5, "include", 7)) { |
---|
3811 | do_ssi_include(conn, path, buf + 12, include_level); |
---|
3812 | #if !defined(NO_POPEN) |
---|
3813 | } else if (!memcmp(buf + 5, "exec", 4)) { |
---|
3814 | do_ssi_exec(conn, buf + 9); |
---|
3815 | #endif // !NO_POPEN |
---|
3816 | } else { |
---|
3817 | cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf); |
---|
3818 | } |
---|
3819 | } |
---|
3820 | len = 0; |
---|
3821 | } else if (in_ssi_tag) { |
---|
3822 | if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { |
---|
3823 | // Not an SSI tag |
---|
3824 | in_ssi_tag = 0; |
---|
3825 | } else if (len == (int) sizeof(buf) - 2) { |
---|
3826 | cry(conn, "%s: SSI tag is too large", path); |
---|
3827 | len = 0; |
---|
3828 | } |
---|
3829 | buf[len++] = ch & 0xff; |
---|
3830 | } else if (ch == '<') { |
---|
3831 | in_ssi_tag = 1; |
---|
3832 | if (len > 0) { |
---|
3833 | mg_write(conn, buf, (size_t) len); |
---|
3834 | } |
---|
3835 | len = 0; |
---|
3836 | buf[len++] = ch & 0xff; |
---|
3837 | } else { |
---|
3838 | buf[len++] = ch & 0xff; |
---|
3839 | if (len == (int) sizeof(buf)) { |
---|
3840 | mg_write(conn, buf, (size_t) len); |
---|
3841 | len = 0; |
---|
3842 | } |
---|
3843 | } |
---|
3844 | } |
---|
3845 | |
---|
3846 | // Send the rest of buffered data |
---|
3847 | if (len > 0) { |
---|
3848 | mg_write(conn, buf, (size_t) len); |
---|
3849 | } |
---|
3850 | } |
---|
3851 | |
---|
3852 | static void handle_ssi_file_request(struct mg_connection *conn, |
---|
3853 | const char *path) { |
---|
3854 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
3855 | |
---|
3856 | if (!mg_fopen(conn, path, "rb", &file)) { |
---|
3857 | send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path, |
---|
3858 | strerror(ERRNO)); |
---|
3859 | } else { |
---|
3860 | conn->must_close = 1; |
---|
3861 | fclose_on_exec(&file); |
---|
3862 | mg_printf(conn, "HTTP/1.1 200 OK\r\n" |
---|
3863 | "Content-Type: text/html\r\nConnection: %s\r\n\r\n", |
---|
3864 | suggest_connection_header(conn)); |
---|
3865 | send_ssi_file(conn, path, &file, 0); |
---|
3866 | mg_fclose(&file); |
---|
3867 | } |
---|
3868 | } |
---|
3869 | |
---|
3870 | static void send_options(struct mg_connection *conn) { |
---|
3871 | conn->status_code = 200; |
---|
3872 | |
---|
3873 | mg_printf(conn, "%s", "HTTP/1.1 200 OK\r\n" |
---|
3874 | "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS, PROPFIND, MKCOL\r\n" |
---|
3875 | "DAV: 1\r\n\r\n"); |
---|
3876 | } |
---|
3877 | |
---|
3878 | // Writes PROPFIND properties for a collection element |
---|
3879 | static void print_props(struct mg_connection *conn, const char* uri, |
---|
3880 | struct file *filep) { |
---|
3881 | char mtime[64]; |
---|
3882 | gmt_time_string(mtime, sizeof(mtime), &filep->modification_time); |
---|
3883 | conn->num_bytes_sent += mg_printf(conn, |
---|
3884 | "<d:response>" |
---|
3885 | "<d:href>%s</d:href>" |
---|
3886 | "<d:propstat>" |
---|
3887 | "<d:prop>" |
---|
3888 | "<d:resourcetype>%s</d:resourcetype>" |
---|
3889 | "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>" |
---|
3890 | "<d:getlastmodified>%s</d:getlastmodified>" |
---|
3891 | "</d:prop>" |
---|
3892 | "<d:status>HTTP/1.1 200 OK</d:status>" |
---|
3893 | "</d:propstat>" |
---|
3894 | "</d:response>\n", |
---|
3895 | uri, |
---|
3896 | filep->is_directory ? "<d:collection/>" : "", |
---|
3897 | filep->size, |
---|
3898 | mtime); |
---|
3899 | } |
---|
3900 | |
---|
3901 | static void print_dav_dir_entry(struct de *de, void *data) { |
---|
3902 | char href[PATH_MAX]; |
---|
3903 | char href_encoded[PATH_MAX]; |
---|
3904 | struct mg_connection *conn = (struct mg_connection *) data; |
---|
3905 | mg_snprintf(conn, href, sizeof(href), "%s%s", |
---|
3906 | conn->request_info.uri, de->file_name); |
---|
3907 | mg_url_encode(href, href_encoded, PATH_MAX-1); |
---|
3908 | print_props(conn, href_encoded, &de->file); |
---|
3909 | } |
---|
3910 | |
---|
3911 | static void handle_propfind(struct mg_connection *conn, const char *path, |
---|
3912 | struct file *filep) { |
---|
3913 | const char *depth = mg_get_header(conn, "Depth"); |
---|
3914 | |
---|
3915 | conn->must_close = 1; |
---|
3916 | conn->status_code = 207; |
---|
3917 | mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n" |
---|
3918 | "Connection: close\r\n" |
---|
3919 | "Content-Type: text/xml; charset=utf-8\r\n\r\n"); |
---|
3920 | |
---|
3921 | conn->num_bytes_sent += mg_printf(conn, |
---|
3922 | "<?xml version=\"1.0\" encoding=\"utf-8\"?>" |
---|
3923 | "<d:multistatus xmlns:d='DAV:'>\n"); |
---|
3924 | |
---|
3925 | // Print properties for the requested resource itself |
---|
3926 | print_props(conn, conn->request_info.uri, filep); |
---|
3927 | |
---|
3928 | // If it is a directory, print directory entries too if Depth is not 0 |
---|
3929 | if (filep->is_directory && |
---|
3930 | !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") && |
---|
3931 | (depth == NULL || strcmp(depth, "0") != 0)) { |
---|
3932 | scan_directory(conn, path, conn, &print_dav_dir_entry); |
---|
3933 | } |
---|
3934 | |
---|
3935 | conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>"); |
---|
3936 | } |
---|
3937 | |
---|
3938 | #if defined(USE_WEBSOCKET) |
---|
3939 | |
---|
3940 | // START OF SHA-1 code |
---|
3941 | // Copyright(c) By Steve Reid <steve@edmweb.com> |
---|
3942 | #define SHA1HANDSOFF |
---|
3943 | #if defined(__sun) |
---|
3944 | #include "solarisfixes.h" |
---|
3945 | #endif |
---|
3946 | |
---|
3947 | union char64long16 { unsigned char c[64]; uint32_t l[16]; }; |
---|
3948 | |
---|
3949 | #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) |
---|
3950 | |
---|
3951 | static uint32_t blk0(union char64long16 *block, int i) { |
---|
3952 | // Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN |
---|
3953 | if (!is_big_endian()) { |
---|
3954 | block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | |
---|
3955 | (rol(block->l[i], 8) & 0x00FF00FF); |
---|
3956 | } |
---|
3957 | return block->l[i]; |
---|
3958 | } |
---|
3959 | |
---|
3960 | #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ |
---|
3961 | ^block->l[(i+2)&15]^block->l[i&15],1)) |
---|
3962 | #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30); |
---|
3963 | #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); |
---|
3964 | #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); |
---|
3965 | #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); |
---|
3966 | #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); |
---|
3967 | |
---|
3968 | typedef struct { |
---|
3969 | uint32_t state[5]; |
---|
3970 | uint32_t count[2]; |
---|
3971 | unsigned char buffer[64]; |
---|
3972 | } SHA1_CTX; |
---|
3973 | |
---|
3974 | static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) { |
---|
3975 | uint32_t a, b, c, d, e; |
---|
3976 | union char64long16 block[1]; |
---|
3977 | |
---|
3978 | memcpy(block, buffer, 64); |
---|
3979 | a = state[0]; |
---|
3980 | b = state[1]; |
---|
3981 | c = state[2]; |
---|
3982 | d = state[3]; |
---|
3983 | e = state[4]; |
---|
3984 | R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3); |
---|
3985 | R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7); |
---|
3986 | R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11); |
---|
3987 | R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15); |
---|
3988 | R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19); |
---|
3989 | R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23); |
---|
3990 | R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27); |
---|
3991 | R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31); |
---|
3992 | R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35); |
---|
3993 | R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39); |
---|
3994 | R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43); |
---|
3995 | R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47); |
---|
3996 | R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51); |
---|
3997 | R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55); |
---|
3998 | R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59); |
---|
3999 | R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63); |
---|
4000 | R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67); |
---|
4001 | R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71); |
---|
4002 | R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75); |
---|
4003 | R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79); |
---|
4004 | state[0] += a; |
---|
4005 | state[1] += b; |
---|
4006 | state[2] += c; |
---|
4007 | state[3] += d; |
---|
4008 | state[4] += e; |
---|
4009 | a = b = c = d = e = 0; |
---|
4010 | memset(block, '\0', sizeof(block)); |
---|
4011 | } |
---|
4012 | |
---|
4013 | static void SHA1Init(SHA1_CTX* context) { |
---|
4014 | context->state[0] = 0x67452301; |
---|
4015 | context->state[1] = 0xEFCDAB89; |
---|
4016 | context->state[2] = 0x98BADCFE; |
---|
4017 | context->state[3] = 0x10325476; |
---|
4018 | context->state[4] = 0xC3D2E1F0; |
---|
4019 | context->count[0] = context->count[1] = 0; |
---|
4020 | } |
---|
4021 | |
---|
4022 | static void SHA1Update(SHA1_CTX* context, const unsigned char* data, |
---|
4023 | uint32_t len) { |
---|
4024 | uint32_t i, j; |
---|
4025 | |
---|
4026 | j = context->count[0]; |
---|
4027 | if ((context->count[0] += len << 3) < j) |
---|
4028 | context->count[1]++; |
---|
4029 | context->count[1] += (len>>29); |
---|
4030 | j = (j >> 3) & 63; |
---|
4031 | if ((j + len) > 63) { |
---|
4032 | memcpy(&context->buffer[j], data, (i = 64-j)); |
---|
4033 | SHA1Transform(context->state, context->buffer); |
---|
4034 | for ( ; i + 63 < len; i += 64) { |
---|
4035 | SHA1Transform(context->state, &data[i]); |
---|
4036 | } |
---|
4037 | j = 0; |
---|
4038 | } |
---|
4039 | else i = 0; |
---|
4040 | memcpy(&context->buffer[j], &data[i], len - i); |
---|
4041 | } |
---|
4042 | |
---|
4043 | static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) { |
---|
4044 | unsigned i; |
---|
4045 | unsigned char finalcount[8], c; |
---|
4046 | |
---|
4047 | for (i = 0; i < 8; i++) { |
---|
4048 | finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] |
---|
4049 | >> ((3-(i & 3)) * 8) ) & 255); |
---|
4050 | } |
---|
4051 | c = 0200; |
---|
4052 | SHA1Update(context, &c, 1); |
---|
4053 | while ((context->count[0] & 504) != 448) { |
---|
4054 | c = 0000; |
---|
4055 | SHA1Update(context, &c, 1); |
---|
4056 | } |
---|
4057 | SHA1Update(context, finalcount, 8); |
---|
4058 | for (i = 0; i < 20; i++) { |
---|
4059 | digest[i] = (unsigned char) |
---|
4060 | ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); |
---|
4061 | } |
---|
4062 | memset(context, '\0', sizeof(*context)); |
---|
4063 | memset(&finalcount, '\0', sizeof(finalcount)); |
---|
4064 | } |
---|
4065 | // END OF SHA1 CODE |
---|
4066 | |
---|
4067 | static void base64_encode(const unsigned char *src, int src_len, char *dst) { |
---|
4068 | static const char *b64 = |
---|
4069 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
---|
4070 | int i, j, a, b, c; |
---|
4071 | |
---|
4072 | for (i = j = 0; i < src_len; i += 3) { |
---|
4073 | a = src[i]; |
---|
4074 | b = i + 1 >= src_len ? 0 : src[i + 1]; |
---|
4075 | c = i + 2 >= src_len ? 0 : src[i + 2]; |
---|
4076 | |
---|
4077 | dst[j++] = b64[a >> 2]; |
---|
4078 | dst[j++] = b64[((a & 3) << 4) | (b >> 4)]; |
---|
4079 | if (i + 1 < src_len) { |
---|
4080 | dst[j++] = b64[(b & 15) << 2 | (c >> 6)]; |
---|
4081 | } |
---|
4082 | if (i + 2 < src_len) { |
---|
4083 | dst[j++] = b64[c & 63]; |
---|
4084 | } |
---|
4085 | } |
---|
4086 | while (j % 4 != 0) { |
---|
4087 | dst[j++] = '='; |
---|
4088 | } |
---|
4089 | dst[j++] = '\0'; |
---|
4090 | } |
---|
4091 | |
---|
4092 | static void send_websocket_handshake(struct mg_connection *conn) { |
---|
4093 | static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; |
---|
4094 | char buf[100], sha[20], b64_sha[sizeof(sha) * 2]; |
---|
4095 | SHA1_CTX sha_ctx; |
---|
4096 | |
---|
4097 | mg_snprintf(conn, buf, sizeof(buf), "%s%s", |
---|
4098 | mg_get_header(conn, "Sec-WebSocket-Key"), magic); |
---|
4099 | SHA1Init(&sha_ctx); |
---|
4100 | SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf)); |
---|
4101 | SHA1Final((unsigned char *) sha, &sha_ctx); |
---|
4102 | base64_encode((unsigned char *) sha, sizeof(sha), b64_sha); |
---|
4103 | mg_printf(conn, "%s%s%s", |
---|
4104 | "HTTP/1.1 101 Switching Protocols\r\n" |
---|
4105 | "Upgrade: websocket\r\n" |
---|
4106 | "Connection: Upgrade\r\n" |
---|
4107 | "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n"); |
---|
4108 | } |
---|
4109 | |
---|
4110 | static void read_websocket(struct mg_connection *conn) { |
---|
4111 | // Pointer to the beginning of the portion of the incoming websocket message |
---|
4112 | // queue. The original websocket upgrade request is never removed, |
---|
4113 | // so the queue begins after it. |
---|
4114 | unsigned char *buf = (unsigned char *) conn->buf + conn->request_len; |
---|
4115 | int bits, n, stop = 0; |
---|
4116 | size_t i, len, mask_len, data_len, header_len, body_len; |
---|
4117 | // data points to the place where the message is stored when passed to the |
---|
4118 | // websocket_data callback. This is either mem on the stack, |
---|
4119 | // or a dynamically allocated buffer if it is too large. |
---|
4120 | char mem[4 * 1024], mask[4], *data; |
---|
4121 | |
---|
4122 | assert(conn->content_len == 0); |
---|
4123 | |
---|
4124 | // Loop continuously, reading messages from the socket, invoking the callback, |
---|
4125 | // and waiting repeatedly until an error occurs. |
---|
4126 | while (!stop) { |
---|
4127 | header_len = 0; |
---|
4128 | // body_len is the length of the entire queue in bytes |
---|
4129 | // len is the length of the current message |
---|
4130 | // data_len is the length of the current message's data payload |
---|
4131 | // header_len is the length of the current message's header |
---|
4132 | if ((body_len = conn->data_len - conn->request_len) >= 2) { |
---|
4133 | len = buf[1] & 127; |
---|
4134 | mask_len = buf[1] & 128 ? 4 : 0; |
---|
4135 | if (len < 126 && body_len >= mask_len) { |
---|
4136 | data_len = len; |
---|
4137 | header_len = 2 + mask_len; |
---|
4138 | } else if (len == 126 && body_len >= 4 + mask_len) { |
---|
4139 | header_len = 4 + mask_len; |
---|
4140 | data_len = ((((int) buf[2]) << 8) + buf[3]); |
---|
4141 | } else if (body_len >= 10 + mask_len) { |
---|
4142 | header_len = 10 + mask_len; |
---|
4143 | data_len = (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) + |
---|
4144 | htonl(* (uint32_t *) &buf[6]); |
---|
4145 | } |
---|
4146 | } |
---|
4147 | |
---|
4148 | // Data layout is as follows: |
---|
4149 | // conn->buf buf |
---|
4150 | // v v frame1 | frame2 |
---|
4151 | // |---------------------|----------------|--------------|------- |
---|
4152 | // | |<--header_len-->|<--data_len-->| |
---|
4153 | // |<-conn->request_len->|<-----body_len----------->| |
---|
4154 | // |<-------------------conn->data_len------------->| |
---|
4155 | |
---|
4156 | if (header_len > 0) { |
---|
4157 | // Allocate space to hold websocket payload |
---|
4158 | data = mem; |
---|
4159 | if (data_len > sizeof(mem) && (data = malloc(data_len)) == NULL) { |
---|
4160 | // Allocation failed, exit the loop and then close the connection |
---|
4161 | // TODO: notify user about the failure |
---|
4162 | break; |
---|
4163 | } |
---|
4164 | |
---|
4165 | // Save mask and bits, otherwise it may be clobbered by memmove below |
---|
4166 | bits = buf[0]; |
---|
4167 | memcpy(mask, buf + header_len - mask_len, mask_len); |
---|
4168 | |
---|
4169 | // Read frame payload into the allocated buffer. |
---|
4170 | assert(body_len >= header_len); |
---|
4171 | if (data_len + header_len > body_len) { |
---|
4172 | len = body_len - header_len; |
---|
4173 | memcpy(data, buf + header_len, len); |
---|
4174 | // TODO: handle pull error |
---|
4175 | pull_all(NULL, conn, data + len, data_len - len); |
---|
4176 | conn->data_len = conn->request_len; |
---|
4177 | } else { |
---|
4178 | len = data_len + header_len; |
---|
4179 | memcpy(data, buf + header_len, data_len); |
---|
4180 | memmove(buf, buf + len, body_len - len); |
---|
4181 | conn->data_len -= len; |
---|
4182 | } |
---|
4183 | |
---|
4184 | // Apply mask if necessary |
---|
4185 | if (mask_len > 0) { |
---|
4186 | for (i = 0; i < data_len; i++) { |
---|
4187 | data[i] ^= mask[i % 4]; |
---|
4188 | } |
---|
4189 | } |
---|
4190 | |
---|
4191 | // Exit the loop if callback signalled to exit, |
---|
4192 | // or "connection close" opcode received. |
---|
4193 | if ((bits & WEBSOCKET_OPCODE_CONNECTION_CLOSE) || |
---|
4194 | (conn->ctx->callbacks.websocket_data != NULL && |
---|
4195 | !conn->ctx->callbacks.websocket_data(conn, bits, data, data_len))) { |
---|
4196 | stop = 1; |
---|
4197 | } |
---|
4198 | |
---|
4199 | if (data != mem) { |
---|
4200 | free(data); |
---|
4201 | } |
---|
4202 | // Not breaking the loop, process next websocket frame. |
---|
4203 | } else { |
---|
4204 | // Buffering websocket request |
---|
4205 | if ((n = pull(NULL, conn, conn->buf + conn->data_len, |
---|
4206 | conn->buf_size - conn->data_len)) <= 0) { |
---|
4207 | break; |
---|
4208 | } |
---|
4209 | conn->data_len += n; |
---|
4210 | } |
---|
4211 | } |
---|
4212 | } |
---|
4213 | |
---|
4214 | int mg_websocket_write(struct mg_connection* conn, int opcode, |
---|
4215 | const char *data, size_t data_len) { |
---|
4216 | unsigned char *copy; |
---|
4217 | size_t copy_len = 0; |
---|
4218 | int retval = -1; |
---|
4219 | |
---|
4220 | if ((copy = (unsigned char *) malloc(data_len + 10)) == NULL) { |
---|
4221 | return -1; |
---|
4222 | } |
---|
4223 | |
---|
4224 | copy[0] = 0x80 + (opcode & 0x0f); |
---|
4225 | |
---|
4226 | // Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 |
---|
4227 | if (data_len < 126) { |
---|
4228 | // Inline 7-bit length field |
---|
4229 | copy[1] = data_len; |
---|
4230 | memcpy(copy + 2, data, data_len); |
---|
4231 | copy_len = 2 + data_len; |
---|
4232 | } else if (data_len <= 0xFFFF) { |
---|
4233 | // 16-bit length field |
---|
4234 | copy[1] = 126; |
---|
4235 | * (uint16_t *) (copy + 2) = htons(data_len); |
---|
4236 | memcpy(copy + 4, data, data_len); |
---|
4237 | copy_len = 4 + data_len; |
---|
4238 | } else { |
---|
4239 | // 64-bit length field |
---|
4240 | copy[1] = 127; |
---|
4241 | * (uint32_t *) (copy + 2) = htonl((uint64_t) data_len >> 32); |
---|
4242 | * (uint32_t *) (copy + 6) = htonl(data_len & 0xffffffff); |
---|
4243 | memcpy(copy + 10, data, data_len); |
---|
4244 | copy_len = 10 + data_len; |
---|
4245 | } |
---|
4246 | |
---|
4247 | // Not thread safe |
---|
4248 | if (copy_len > 0) { |
---|
4249 | retval = mg_write(conn, copy, copy_len); |
---|
4250 | } |
---|
4251 | free(copy); |
---|
4252 | |
---|
4253 | return retval; |
---|
4254 | } |
---|
4255 | |
---|
4256 | static void handle_websocket_request(struct mg_connection *conn) { |
---|
4257 | const char *version = mg_get_header(conn, "Sec-WebSocket-Version"); |
---|
4258 | if (version == NULL || strcmp(version, "13") != 0) { |
---|
4259 | send_http_error(conn, 426, "Upgrade Required", "%s", "Upgrade Required"); |
---|
4260 | } else if (conn->ctx->callbacks.websocket_connect != NULL && |
---|
4261 | conn->ctx->callbacks.websocket_connect(conn) != 0) { |
---|
4262 | // Callback has returned non-zero, do not proceed with handshake |
---|
4263 | } else { |
---|
4264 | send_websocket_handshake(conn); |
---|
4265 | if (conn->ctx->callbacks.websocket_ready != NULL) { |
---|
4266 | conn->ctx->callbacks.websocket_ready(conn); |
---|
4267 | } |
---|
4268 | read_websocket(conn); |
---|
4269 | } |
---|
4270 | } |
---|
4271 | |
---|
4272 | static int is_websocket_request(const struct mg_connection *conn) { |
---|
4273 | const char *host, *upgrade, *connection, *version, *key; |
---|
4274 | |
---|
4275 | host = mg_get_header(conn, "Host"); |
---|
4276 | upgrade = mg_get_header(conn, "Upgrade"); |
---|
4277 | connection = mg_get_header(conn, "Connection"); |
---|
4278 | key = mg_get_header(conn, "Sec-WebSocket-Key"); |
---|
4279 | version = mg_get_header(conn, "Sec-WebSocket-Version"); |
---|
4280 | |
---|
4281 | return host != NULL && upgrade != NULL && connection != NULL && |
---|
4282 | key != NULL && version != NULL && |
---|
4283 | mg_strcasestr(upgrade, "websocket") != NULL && |
---|
4284 | mg_strcasestr(connection, "Upgrade") != NULL; |
---|
4285 | } |
---|
4286 | #endif // !USE_WEBSOCKET |
---|
4287 | |
---|
4288 | static int isbyte(int n) { |
---|
4289 | return n >= 0 && n <= 255; |
---|
4290 | } |
---|
4291 | |
---|
4292 | static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) { |
---|
4293 | int n, a, b, c, d, slash = 32, len = 0; |
---|
4294 | |
---|
4295 | if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || |
---|
4296 | sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && |
---|
4297 | isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && |
---|
4298 | slash >= 0 && slash < 33) { |
---|
4299 | len = n; |
---|
4300 | *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d; |
---|
4301 | *mask = slash ? 0xffffffffU << (32 - slash) : 0; |
---|
4302 | } |
---|
4303 | |
---|
4304 | return len; |
---|
4305 | } |
---|
4306 | |
---|
4307 | static int set_throttle(const char *spec, uint32_t remote_ip, const char *uri) { |
---|
4308 | int throttle = 0; |
---|
4309 | struct vec vec, val; |
---|
4310 | uint32_t net, mask; |
---|
4311 | char mult; |
---|
4312 | double v; |
---|
4313 | |
---|
4314 | while ((spec = next_option(spec, &vec, &val)) != NULL) { |
---|
4315 | mult = ','; |
---|
4316 | if (sscanf(val.ptr, "%lf%c", &v, &mult) < 1 || v < 0 || |
---|
4317 | (lowercase(&mult) != 'k' && lowercase(&mult) != 'm' && mult != ',')) { |
---|
4318 | continue; |
---|
4319 | } |
---|
4320 | v *= lowercase(&mult) == 'k' ? 1024 : lowercase(&mult) == 'm' ? 1048576 : 1; |
---|
4321 | if (vec.len == 1 && vec.ptr[0] == '*') { |
---|
4322 | throttle = (int) v; |
---|
4323 | } else if (parse_net(vec.ptr, &net, &mask) > 0) { |
---|
4324 | if ((remote_ip & mask) == net) { |
---|
4325 | throttle = (int) v; |
---|
4326 | } |
---|
4327 | } else if (match_prefix(vec.ptr, vec.len, uri) > 0) { |
---|
4328 | throttle = (int) v; |
---|
4329 | } |
---|
4330 | } |
---|
4331 | |
---|
4332 | return throttle; |
---|
4333 | } |
---|
4334 | |
---|
4335 | static uint32_t get_remote_ip(const struct mg_connection *conn) { |
---|
4336 | return ntohl(* (uint32_t *) &conn->client.rsa.sin.sin_addr); |
---|
4337 | } |
---|
4338 | |
---|
4339 | #ifdef USE_LUA |
---|
4340 | #include "mod_lua.c" |
---|
4341 | #endif // USE_LUA |
---|
4342 | |
---|
4343 | int mg_upload(struct mg_connection *conn, const char *destination_dir) { |
---|
4344 | const char *content_type_header, *boundary_start; |
---|
4345 | char buf[MG_BUF_LEN], path[PATH_MAX], fname[1024], boundary[100], *s; |
---|
4346 | FILE *fp; |
---|
4347 | int bl, n, i, j, headers_len, boundary_len, eof, |
---|
4348 | len = 0, num_uploaded_files = 0; |
---|
4349 | |
---|
4350 | // Request looks like this: |
---|
4351 | // |
---|
4352 | // POST /upload HTTP/1.1 |
---|
4353 | // Host: 127.0.0.1:8080 |
---|
4354 | // Content-Length: 244894 |
---|
4355 | // Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryRVr |
---|
4356 | // |
---|
4357 | // ------WebKitFormBoundaryRVr |
---|
4358 | // Content-Disposition: form-data; name="file"; filename="accum.png" |
---|
4359 | // Content-Type: image/png |
---|
4360 | // |
---|
4361 | // <89>PNG |
---|
4362 | // <PNG DATA> |
---|
4363 | // ------WebKitFormBoundaryRVr |
---|
4364 | |
---|
4365 | // Extract boundary string from the Content-Type header |
---|
4366 | if ((content_type_header = mg_get_header(conn, "Content-Type")) == NULL || |
---|
4367 | (boundary_start = mg_strcasestr(content_type_header, |
---|
4368 | "boundary=")) == NULL || |
---|
4369 | (sscanf(boundary_start, "boundary=\"%99[^\"]\"", boundary) == 0 && |
---|
4370 | sscanf(boundary_start, "boundary=%99s", boundary) == 0) || |
---|
4371 | boundary[0] == '\0') { |
---|
4372 | return num_uploaded_files; |
---|
4373 | } |
---|
4374 | |
---|
4375 | boundary_len = strlen(boundary); |
---|
4376 | bl = boundary_len + 4; // \r\n--<boundary> |
---|
4377 | for (;;) { |
---|
4378 | // Pull in headers |
---|
4379 | assert(len >= 0 && len <= (int) sizeof(buf)); |
---|
4380 | while ((n = mg_read(conn, buf + len, sizeof(buf) - len)) > 0) { |
---|
4381 | len += n; |
---|
4382 | } |
---|
4383 | if ((headers_len = get_request_len(buf, len)) <= 0) { |
---|
4384 | break; |
---|
4385 | } |
---|
4386 | |
---|
4387 | // Fetch file name. |
---|
4388 | fname[0] = '\0'; |
---|
4389 | for (i = j = 0; i < headers_len; i++) { |
---|
4390 | if (buf[i] == '\r' && buf[i + 1] == '\n') { |
---|
4391 | buf[i] = buf[i + 1] = '\0'; |
---|
4392 | // TODO(lsm): don't expect filename to be the 3rd field, |
---|
4393 | // parse the header properly instead. |
---|
4394 | sscanf(&buf[j], "Content-Disposition: %*s %*s filename=\"%1023[^\"]", |
---|
4395 | fname); |
---|
4396 | j = i + 2; |
---|
4397 | } |
---|
4398 | } |
---|
4399 | |
---|
4400 | // Give up if the headers are not what we expect |
---|
4401 | if (fname[0] == '\0') { |
---|
4402 | break; |
---|
4403 | } |
---|
4404 | |
---|
4405 | // Move data to the beginning of the buffer |
---|
4406 | assert(len >= headers_len); |
---|
4407 | memmove(buf, &buf[headers_len], len - headers_len); |
---|
4408 | len -= headers_len; |
---|
4409 | |
---|
4410 | // We open the file with exclusive lock held. This guarantee us |
---|
4411 | // there is no other thread can save into the same file simultaneously. |
---|
4412 | fp = NULL; |
---|
4413 | // Construct destination file name. Do not allow paths to have slashes. |
---|
4414 | if ((s = strrchr(fname, '/')) == NULL && |
---|
4415 | (s = strrchr(fname, '\\')) == NULL) { |
---|
4416 | s = fname; |
---|
4417 | } |
---|
4418 | |
---|
4419 | // Open file in binary mode. TODO: set an exclusive lock. |
---|
4420 | snprintf(path, sizeof(path), "%s/%s", destination_dir, s); |
---|
4421 | if ((fp = fopen(path, "wb")) == NULL) { |
---|
4422 | break; |
---|
4423 | } |
---|
4424 | |
---|
4425 | // Read POST data, write into file until boundary is found. |
---|
4426 | eof = n = 0; |
---|
4427 | do { |
---|
4428 | len += n; |
---|
4429 | for (i = 0; i < len - bl; i++) { |
---|
4430 | if (!memcmp(&buf[i], "\r\n--", 4) && |
---|
4431 | !memcmp(&buf[i + 4], boundary, boundary_len)) { |
---|
4432 | // Found boundary, that's the end of file data. |
---|
4433 | fwrite(buf, 1, i, fp); |
---|
4434 | eof = 1; |
---|
4435 | memmove(buf, &buf[i + bl], len - (i + bl)); |
---|
4436 | len -= i + bl; |
---|
4437 | break; |
---|
4438 | } |
---|
4439 | } |
---|
4440 | if (!eof && len > bl) { |
---|
4441 | fwrite(buf, 1, len - bl, fp); |
---|
4442 | memmove(buf, &buf[len - bl], bl); |
---|
4443 | len = bl; |
---|
4444 | } |
---|
4445 | } while (!eof && (n = mg_read(conn, buf + len, sizeof(buf) - len)) > 0); |
---|
4446 | fclose(fp); |
---|
4447 | if (eof) { |
---|
4448 | num_uploaded_files++; |
---|
4449 | if (conn->ctx->callbacks.upload != NULL) { |
---|
4450 | conn->ctx->callbacks.upload(conn, path); |
---|
4451 | } |
---|
4452 | } |
---|
4453 | } |
---|
4454 | |
---|
4455 | return num_uploaded_files; |
---|
4456 | } |
---|
4457 | |
---|
4458 | static int is_put_or_delete_request(const struct mg_connection *conn) { |
---|
4459 | const char *s = conn->request_info.request_method; |
---|
4460 | return s != NULL && (!strcmp(s, "PUT") || |
---|
4461 | !strcmp(s, "DELETE") || |
---|
4462 | !strcmp(s, "MKCOL")); |
---|
4463 | } |
---|
4464 | |
---|
4465 | static int get_first_ssl_listener_index(const struct mg_context *ctx) { |
---|
4466 | int i, index = -1; |
---|
4467 | for (i = 0; index == -1 && i < ctx->num_listening_sockets; i++) { |
---|
4468 | index = ctx->listening_sockets[i].is_ssl ? i : -1; |
---|
4469 | } |
---|
4470 | return index; |
---|
4471 | } |
---|
4472 | |
---|
4473 | static void redirect_to_https_port(struct mg_connection *conn, int ssl_index) { |
---|
4474 | char host[1025]; |
---|
4475 | const char *host_header; |
---|
4476 | |
---|
4477 | if ((host_header = mg_get_header(conn, "Host")) == NULL || |
---|
4478 | sscanf(host_header, "%1024[^:]", host) == 0) { |
---|
4479 | // Cannot get host from the Host: header. Fallback to our IP address. |
---|
4480 | sockaddr_to_string(host, sizeof(host), &conn->client.lsa); |
---|
4481 | } |
---|
4482 | |
---|
4483 | mg_printf(conn, "HTTP/1.1 302 Found\r\nLocation: https://%s:%d%s\r\n\r\n", |
---|
4484 | host, (int) ntohs(conn->ctx->listening_sockets[ssl_index]. |
---|
4485 | lsa.sin.sin_port), conn->request_info.uri); |
---|
4486 | } |
---|
4487 | |
---|
4488 | // This is the heart of the Mongoose's logic. |
---|
4489 | // This function is called when the request is read, parsed and validated, |
---|
4490 | // and Mongoose must decide what action to take: serve a file, or |
---|
4491 | // a directory, or call embedded function, etcetera. |
---|
4492 | static void handle_request(struct mg_connection *conn) { |
---|
4493 | struct mg_request_info *ri = &conn->request_info; |
---|
4494 | char path[PATH_MAX]; |
---|
4495 | int uri_len, ssl_index; |
---|
4496 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
4497 | |
---|
4498 | if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) { |
---|
4499 | * ((char *) conn->request_info.query_string++) = '\0'; |
---|
4500 | } |
---|
4501 | uri_len = (int) strlen(ri->uri); |
---|
4502 | mg_url_decode(ri->uri, uri_len, (char *) ri->uri, uri_len + 1, 0); |
---|
4503 | remove_double_dots_and_double_slashes((char *) ri->uri); |
---|
4504 | convert_uri_to_file_name(conn, path, sizeof(path), &file); |
---|
4505 | conn->throttle = set_throttle(conn->ctx->config[THROTTLE], |
---|
4506 | get_remote_ip(conn), ri->uri); |
---|
4507 | |
---|
4508 | DEBUG_TRACE(("%s", ri->uri)); |
---|
4509 | // Perform redirect and auth checks before calling begin_request() handler. |
---|
4510 | // Otherwise, begin_request() would need to perform auth checks and redirects. |
---|
4511 | if (!conn->client.is_ssl && conn->client.ssl_redir && |
---|
4512 | (ssl_index = get_first_ssl_listener_index(conn->ctx)) > -1) { |
---|
4513 | redirect_to_https_port(conn, ssl_index); |
---|
4514 | } else if (!is_put_or_delete_request(conn) && |
---|
4515 | !check_authorization(conn, path)) { |
---|
4516 | send_authorization_request(conn); |
---|
4517 | } else if (conn->ctx->callbacks.begin_request != NULL && |
---|
4518 | conn->ctx->callbacks.begin_request(conn)) { |
---|
4519 | // Do nothing, callback has served the request |
---|
4520 | #if defined(USE_WEBSOCKET) |
---|
4521 | } else if (is_websocket_request(conn)) { |
---|
4522 | handle_websocket_request(conn); |
---|
4523 | #endif |
---|
4524 | } else if (!strcmp(ri->request_method, "OPTIONS")) { |
---|
4525 | send_options(conn); |
---|
4526 | } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) { |
---|
4527 | send_http_error(conn, 404, "Not Found", "Not Found"); |
---|
4528 | } else if (is_put_or_delete_request(conn) && |
---|
4529 | (is_authorized_for_put(conn) != 1)) { |
---|
4530 | send_authorization_request(conn); |
---|
4531 | } else if (!strcmp(ri->request_method, "PUT")) { |
---|
4532 | put_file(conn, path); |
---|
4533 | } else if (!strcmp(ri->request_method, "MKCOL")) { |
---|
4534 | mkcol(conn, path); |
---|
4535 | } else if (!strcmp(ri->request_method, "DELETE")) { |
---|
4536 | struct de de; |
---|
4537 | memset(&de.file, 0, sizeof(de.file)); |
---|
4538 | if(!mg_stat(conn, path, &de.file)) { |
---|
4539 | send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
4540 | } else { |
---|
4541 | if(de.file.modification_time) { |
---|
4542 | if(de.file.is_directory) { |
---|
4543 | remove_directory(conn, path); |
---|
4544 | send_http_error(conn, 204, "No Content", "%s", ""); |
---|
4545 | } else if (mg_remove(path) == 0) { |
---|
4546 | send_http_error(conn, 204, "No Content", "%s", ""); |
---|
4547 | } else { |
---|
4548 | send_http_error(conn, 423, "Locked", "remove(%s): %s", path, |
---|
4549 | strerror(ERRNO)); |
---|
4550 | } |
---|
4551 | } |
---|
4552 | else { |
---|
4553 | send_http_error(conn, 500, http_500_error, "remove(%s): %s", path, |
---|
4554 | strerror(ERRNO)); |
---|
4555 | } |
---|
4556 | } |
---|
4557 | } else if ((file.membuf == NULL && file.modification_time == (time_t) 0) || |
---|
4558 | must_hide_file(conn, path)) { |
---|
4559 | send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
4560 | } else if (file.is_directory && ri->uri[uri_len - 1] != '/') { |
---|
4561 | mg_printf(conn, "HTTP/1.1 301 Moved Permanently\r\n" |
---|
4562 | "Location: %s/\r\n\r\n", ri->uri); |
---|
4563 | } else if (!strcmp(ri->request_method, "PROPFIND")) { |
---|
4564 | handle_propfind(conn, path, &file); |
---|
4565 | } else if (file.is_directory && |
---|
4566 | !substitute_index_file(conn, path, sizeof(path), &file)) { |
---|
4567 | if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) { |
---|
4568 | handle_directory_request(conn, path); |
---|
4569 | } else { |
---|
4570 | send_http_error(conn, 403, "Directory Listing Denied", |
---|
4571 | "Directory listing denied"); |
---|
4572 | } |
---|
4573 | #ifdef USE_LUA |
---|
4574 | } else if (match_prefix("**.lp$", 6, path) > 0) { |
---|
4575 | handle_lsp_request(conn, path, &file, NULL); |
---|
4576 | #endif |
---|
4577 | #if !defined(NO_CGI) |
---|
4578 | } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
---|
4579 | strlen(conn->ctx->config[CGI_EXTENSIONS]), |
---|
4580 | path) > 0) { |
---|
4581 | if (strcmp(ri->request_method, "POST") && |
---|
4582 | strcmp(ri->request_method, "HEAD") && |
---|
4583 | strcmp(ri->request_method, "GET")) { |
---|
4584 | send_http_error(conn, 501, "Not Implemented", |
---|
4585 | "Method %s is not implemented", ri->request_method); |
---|
4586 | } else { |
---|
4587 | handle_cgi_request(conn, path); |
---|
4588 | } |
---|
4589 | #endif // !NO_CGI |
---|
4590 | } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
---|
4591 | strlen(conn->ctx->config[SSI_EXTENSIONS]), |
---|
4592 | path) > 0) { |
---|
4593 | handle_ssi_file_request(conn, path); |
---|
4594 | } else if (is_not_modified(conn, &file)) { |
---|
4595 | send_http_error(conn, 304, "Not Modified", "%s", ""); |
---|
4596 | } else { |
---|
4597 | handle_file_request(conn, path, &file); |
---|
4598 | } |
---|
4599 | } |
---|
4600 | |
---|
4601 | static void close_all_listening_sockets(struct mg_context *ctx) { |
---|
4602 | int i; |
---|
4603 | for (i = 0; i < ctx->num_listening_sockets; i++) { |
---|
4604 | closesocket(ctx->listening_sockets[i].sock); |
---|
4605 | } |
---|
4606 | free(ctx->listening_sockets); |
---|
4607 | } |
---|
4608 | |
---|
4609 | static int is_valid_port(unsigned int port) { |
---|
4610 | return port > 0 && port < 0xffff; |
---|
4611 | } |
---|
4612 | |
---|
4613 | // Valid listening port specification is: [ip_address:]port[s] |
---|
4614 | // Examples: 80, 443s, 127.0.0.1:3128, 1.2.3.4:8080s |
---|
4615 | // TODO(lsm): add parsing of the IPv6 address |
---|
4616 | static int parse_port_string(const struct vec *vec, struct socket *so) { |
---|
4617 | unsigned int a, b, c, d, ch, len, port; |
---|
4618 | #if defined(USE_IPV6) |
---|
4619 | char buf[100]; |
---|
4620 | #endif |
---|
4621 | |
---|
4622 | // MacOS needs that. If we do not zero it, subsequent bind() will fail. |
---|
4623 | // Also, all-zeroes in the socket address means binding to all addresses |
---|
4624 | // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). |
---|
4625 | memset(so, 0, sizeof(*so)); |
---|
4626 | so->lsa.sin.sin_family = AF_INET; |
---|
4627 | |
---|
4628 | if (sscanf(vec->ptr, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) { |
---|
4629 | // Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 |
---|
4630 | so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); |
---|
4631 | so->lsa.sin.sin_port = htons((uint16_t) port); |
---|
4632 | #if defined(USE_IPV6) |
---|
4633 | |
---|
4634 | } else if (sscanf(vec->ptr, "[%49[^]]]:%d%n", buf, &port, &len) == 2 && |
---|
4635 | inet_pton(AF_INET6, buf, &so->lsa.sin6.sin6_addr)) { |
---|
4636 | // IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080 |
---|
4637 | so->lsa.sin6.sin6_family = AF_INET6; |
---|
4638 | so->lsa.sin6.sin6_port = htons((uint16_t) port); |
---|
4639 | #endif |
---|
4640 | } else if (sscanf(vec->ptr, "%u%n", &port, &len) == 1) { |
---|
4641 | // If only port is specified, bind to IPv4, INADDR_ANY |
---|
4642 | so->lsa.sin.sin_port = htons((uint16_t) port); |
---|
4643 | } else { |
---|
4644 | port = len = 0; // Parsing failure. Make port invalid. |
---|
4645 | } |
---|
4646 | |
---|
4647 | ch = vec->ptr[len]; // Next character after the port number |
---|
4648 | so->is_ssl = ch == 's'; |
---|
4649 | so->ssl_redir = ch == 'r'; |
---|
4650 | |
---|
4651 | // Make sure the port is valid and vector ends with 's', 'r' or ',' |
---|
4652 | return is_valid_port(port) && |
---|
4653 | (ch == '\0' || ch == 's' || ch == 'r' || ch == ','); |
---|
4654 | } |
---|
4655 | |
---|
4656 | static int set_ports_option(struct mg_context *ctx) { |
---|
4657 | const char *list = ctx->config[LISTENING_PORTS]; |
---|
4658 | int on = 1, success = 1; |
---|
4659 | #if defined(USE_IPV6) |
---|
4660 | int off = 0; |
---|
4661 | #endif |
---|
4662 | struct vec vec; |
---|
4663 | struct socket so, *ptr; |
---|
4664 | |
---|
4665 | while (success && (list = next_option(list, &vec, NULL)) != NULL) { |
---|
4666 | if (!parse_port_string(&vec, &so)) { |
---|
4667 | cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s", |
---|
4668 | __func__, (int) vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|r]"); |
---|
4669 | success = 0; |
---|
4670 | } else if (so.is_ssl && ctx->ssl_ctx == NULL) { |
---|
4671 | cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?"); |
---|
4672 | success = 0; |
---|
4673 | } else if ((so.sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) == |
---|
4674 | INVALID_SOCKET || |
---|
4675 | // On Windows, SO_REUSEADDR is recommended only for |
---|
4676 | // broadcast UDP sockets |
---|
4677 | setsockopt(so.sock, SOL_SOCKET, SO_REUSEADDR, |
---|
4678 | (void *) &on, sizeof(on)) != 0 || |
---|
4679 | #if defined(USE_IPV6) |
---|
4680 | (so.lsa.sa.sa_family == AF_INET6 && |
---|
4681 | setsockopt(so.sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *) &off, |
---|
4682 | sizeof(off)) != 0) || |
---|
4683 | #endif |
---|
4684 | bind(so.sock, &so.lsa.sa, so.lsa.sa.sa_family == AF_INET ? |
---|
4685 | sizeof(so.lsa.sin) : sizeof(so.lsa)) != 0 || |
---|
4686 | listen(so.sock, SOMAXCONN) != 0) { |
---|
4687 | cry(fc(ctx), "%s: cannot bind to %.*s: %d (%s)", __func__, |
---|
4688 | (int) vec.len, vec.ptr, ERRNO, strerror(errno)); |
---|
4689 | closesocket(so.sock); |
---|
4690 | success = 0; |
---|
4691 | } else if ((ptr = (struct socket *) realloc(ctx->listening_sockets, |
---|
4692 | (ctx->num_listening_sockets + 1) * |
---|
4693 | sizeof(ctx->listening_sockets[0]))) == NULL) { |
---|
4694 | closesocket(so.sock); |
---|
4695 | success = 0; |
---|
4696 | } else { |
---|
4697 | set_close_on_exec(so.sock); |
---|
4698 | ctx->listening_sockets = ptr; |
---|
4699 | ctx->listening_sockets[ctx->num_listening_sockets] = so; |
---|
4700 | ctx->num_listening_sockets++; |
---|
4701 | } |
---|
4702 | } |
---|
4703 | |
---|
4704 | if (!success) { |
---|
4705 | close_all_listening_sockets(ctx); |
---|
4706 | } |
---|
4707 | |
---|
4708 | return success; |
---|
4709 | } |
---|
4710 | |
---|
4711 | static void log_header(const struct mg_connection *conn, const char *header, |
---|
4712 | FILE *fp) { |
---|
4713 | const char *header_value; |
---|
4714 | |
---|
4715 | if ((header_value = mg_get_header(conn, header)) == NULL) { |
---|
4716 | (void) fprintf(fp, "%s", " -"); |
---|
4717 | } else { |
---|
4718 | (void) fprintf(fp, " \"%s\"", header_value); |
---|
4719 | } |
---|
4720 | } |
---|
4721 | |
---|
4722 | static void log_access(const struct mg_connection *conn) { |
---|
4723 | const struct mg_request_info *ri; |
---|
4724 | FILE *fp; |
---|
4725 | char date[64], src_addr[IP_ADDR_STR_LEN]; |
---|
4726 | |
---|
4727 | fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL : |
---|
4728 | fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+"); |
---|
4729 | |
---|
4730 | if (fp == NULL) |
---|
4731 | return; |
---|
4732 | |
---|
4733 | strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", |
---|
4734 | localtime(&conn->birth_time)); |
---|
4735 | |
---|
4736 | ri = &conn->request_info; |
---|
4737 | flockfile(fp); |
---|
4738 | |
---|
4739 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
4740 | fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT, |
---|
4741 | src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date, |
---|
4742 | ri->request_method ? ri->request_method : "-", |
---|
4743 | ri->uri ? ri->uri : "-", ri->http_version, |
---|
4744 | conn->status_code, conn->num_bytes_sent); |
---|
4745 | log_header(conn, "Referer", fp); |
---|
4746 | log_header(conn, "User-Agent", fp); |
---|
4747 | fputc('\n', fp); |
---|
4748 | fflush(fp); |
---|
4749 | |
---|
4750 | funlockfile(fp); |
---|
4751 | fclose(fp); |
---|
4752 | } |
---|
4753 | |
---|
4754 | // Verify given socket address against the ACL. |
---|
4755 | // Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. |
---|
4756 | static int check_acl(struct mg_context *ctx, uint32_t remote_ip) { |
---|
4757 | int allowed, flag; |
---|
4758 | uint32_t net, mask; |
---|
4759 | struct vec vec; |
---|
4760 | const char *list = ctx->config[ACCESS_CONTROL_LIST]; |
---|
4761 | |
---|
4762 | // If any ACL is set, deny by default |
---|
4763 | allowed = list == NULL ? '+' : '-'; |
---|
4764 | |
---|
4765 | while ((list = next_option(list, &vec, NULL)) != NULL) { |
---|
4766 | flag = vec.ptr[0]; |
---|
4767 | if ((flag != '+' && flag != '-') || |
---|
4768 | parse_net(&vec.ptr[1], &net, &mask) == 0) { |
---|
4769 | cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); |
---|
4770 | return -1; |
---|
4771 | } |
---|
4772 | |
---|
4773 | if (net == (remote_ip & mask)) { |
---|
4774 | allowed = flag; |
---|
4775 | } |
---|
4776 | } |
---|
4777 | |
---|
4778 | return allowed == '+'; |
---|
4779 | } |
---|
4780 | |
---|
4781 | #if !defined(_WIN32) |
---|
4782 | static int set_uid_option(struct mg_context *ctx) { |
---|
4783 | struct passwd *pw; |
---|
4784 | const char *uid = ctx->config[RUN_AS_USER]; |
---|
4785 | int success = 0; |
---|
4786 | |
---|
4787 | if (uid == NULL) { |
---|
4788 | success = 1; |
---|
4789 | } else { |
---|
4790 | if ((pw = getpwnam(uid)) == NULL) { |
---|
4791 | cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); |
---|
4792 | } else if (setgid(pw->pw_gid) == -1) { |
---|
4793 | cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno)); |
---|
4794 | } else if (setuid(pw->pw_uid) == -1) { |
---|
4795 | cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno)); |
---|
4796 | } else { |
---|
4797 | success = 1; |
---|
4798 | } |
---|
4799 | } |
---|
4800 | |
---|
4801 | return success; |
---|
4802 | } |
---|
4803 | #endif // !_WIN32 |
---|
4804 | |
---|
4805 | #if !defined(NO_SSL) |
---|
4806 | static pthread_mutex_t *ssl_mutexes; |
---|
4807 | |
---|
4808 | static int sslize(struct mg_connection *conn, SSL_CTX *s, int (*func)(SSL *)) { |
---|
4809 | return (conn->ssl = SSL_new(s)) != NULL && |
---|
4810 | SSL_set_fd(conn->ssl, conn->client.sock) == 1 && |
---|
4811 | func(conn->ssl) == 1; |
---|
4812 | } |
---|
4813 | |
---|
4814 | // Return OpenSSL error message |
---|
4815 | static const char *ssl_error(void) { |
---|
4816 | unsigned long err; |
---|
4817 | err = ERR_get_error(); |
---|
4818 | return err == 0 ? "" : ERR_error_string(err, NULL); |
---|
4819 | } |
---|
4820 | |
---|
4821 | static void ssl_locking_callback(int mode, int mutex_num, const char *file, |
---|
4822 | int line) { |
---|
4823 | (void) line; |
---|
4824 | (void) file; |
---|
4825 | |
---|
4826 | if (mode & 1) { // 1 is CRYPTO_LOCK |
---|
4827 | (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]); |
---|
4828 | } else { |
---|
4829 | (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]); |
---|
4830 | } |
---|
4831 | } |
---|
4832 | |
---|
4833 | static unsigned long ssl_id_callback(void) { |
---|
4834 | return (unsigned long) pthread_self(); |
---|
4835 | } |
---|
4836 | |
---|
4837 | #if !defined(NO_SSL_DL) |
---|
4838 | static int load_dll(struct mg_context *ctx, const char *dll_name, |
---|
4839 | struct ssl_func *sw) { |
---|
4840 | union {void *p; void (*fp)(void);} u; |
---|
4841 | void *dll_handle; |
---|
4842 | struct ssl_func *fp; |
---|
4843 | |
---|
4844 | if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) { |
---|
4845 | cry(fc(ctx), "%s: cannot load %s", __func__, dll_name); |
---|
4846 | return 0; |
---|
4847 | } |
---|
4848 | |
---|
4849 | for (fp = sw; fp->name != NULL; fp++) { |
---|
4850 | #ifdef _WIN32 |
---|
4851 | // GetProcAddress() returns pointer to function |
---|
4852 | u.fp = (void (*)(void)) dlsym(dll_handle, fp->name); |
---|
4853 | #else |
---|
4854 | // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to |
---|
4855 | // function pointers. We need to use a union to make a cast. |
---|
4856 | u.p = dlsym(dll_handle, fp->name); |
---|
4857 | #endif // _WIN32 |
---|
4858 | if (u.fp == NULL) { |
---|
4859 | cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name); |
---|
4860 | return 0; |
---|
4861 | } else { |
---|
4862 | fp->ptr = u.fp; |
---|
4863 | } |
---|
4864 | } |
---|
4865 | |
---|
4866 | return 1; |
---|
4867 | } |
---|
4868 | #endif // NO_SSL_DL |
---|
4869 | |
---|
4870 | // Dynamically load SSL library. Set up ctx->ssl_ctx pointer. |
---|
4871 | static int set_ssl_option(struct mg_context *ctx) { |
---|
4872 | int i, size; |
---|
4873 | const char *pem; |
---|
4874 | |
---|
4875 | // If PEM file is not specified and the init_ssl callback |
---|
4876 | // is not specified, skip SSL initialization. |
---|
4877 | if ((pem = ctx->config[SSL_CERTIFICATE]) == NULL && |
---|
4878 | ctx->callbacks.init_ssl == NULL) { |
---|
4879 | return 1; |
---|
4880 | } |
---|
4881 | |
---|
4882 | #if !defined(NO_SSL_DL) |
---|
4883 | if (!load_dll(ctx, SSL_LIB, ssl_sw) || |
---|
4884 | !load_dll(ctx, CRYPTO_LIB, crypto_sw)) { |
---|
4885 | return 0; |
---|
4886 | } |
---|
4887 | #endif // NO_SSL_DL |
---|
4888 | |
---|
4889 | // Initialize SSL library |
---|
4890 | SSL_library_init(); |
---|
4891 | SSL_load_error_strings(); |
---|
4892 | |
---|
4893 | if ((ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) { |
---|
4894 | cry(fc(ctx), "SSL_CTX_new (server) error: %s", ssl_error()); |
---|
4895 | return 0; |
---|
4896 | } |
---|
4897 | |
---|
4898 | // If user callback returned non-NULL, that means that user callback has |
---|
4899 | // set up certificate itself. In this case, skip sertificate setting. |
---|
4900 | if ((ctx->callbacks.init_ssl == NULL || |
---|
4901 | !ctx->callbacks.init_ssl(ctx->ssl_ctx, ctx->user_data)) && |
---|
4902 | (SSL_CTX_use_certificate_file(ctx->ssl_ctx, pem, 1) == 0 || |
---|
4903 | SSL_CTX_use_PrivateKey_file(ctx->ssl_ctx, pem, 1) == 0)) { |
---|
4904 | cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error()); |
---|
4905 | return 0; |
---|
4906 | } |
---|
4907 | |
---|
4908 | if (pem != NULL) { |
---|
4909 | (void) SSL_CTX_use_certificate_chain_file(ctx->ssl_ctx, pem); |
---|
4910 | } |
---|
4911 | |
---|
4912 | // Initialize locking callbacks, needed for thread safety. |
---|
4913 | // http://www.openssl.org/support/faq.html#PROG1 |
---|
4914 | size = sizeof(pthread_mutex_t) * CRYPTO_num_locks(); |
---|
4915 | if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) { |
---|
4916 | cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error()); |
---|
4917 | return 0; |
---|
4918 | } |
---|
4919 | |
---|
4920 | for (i = 0; i < CRYPTO_num_locks(); i++) { |
---|
4921 | pthread_mutex_init(&ssl_mutexes[i], NULL); |
---|
4922 | } |
---|
4923 | |
---|
4924 | CRYPTO_set_locking_callback(&ssl_locking_callback); |
---|
4925 | CRYPTO_set_id_callback(&ssl_id_callback); |
---|
4926 | |
---|
4927 | return 1; |
---|
4928 | } |
---|
4929 | |
---|
4930 | static void uninitialize_ssl(struct mg_context *ctx) { |
---|
4931 | int i; |
---|
4932 | if (ctx->ssl_ctx != NULL) { |
---|
4933 | CRYPTO_set_locking_callback(NULL); |
---|
4934 | for (i = 0; i < CRYPTO_num_locks(); i++) { |
---|
4935 | pthread_mutex_destroy(&ssl_mutexes[i]); |
---|
4936 | } |
---|
4937 | CRYPTO_set_locking_callback(NULL); |
---|
4938 | CRYPTO_set_id_callback(NULL); |
---|
4939 | } |
---|
4940 | } |
---|
4941 | #endif // !NO_SSL |
---|
4942 | |
---|
4943 | static int set_gpass_option(struct mg_context *ctx) { |
---|
4944 | struct file file = STRUCT_FILE_INITIALIZER; |
---|
4945 | const char *path = ctx->config[GLOBAL_PASSWORDS_FILE]; |
---|
4946 | if (path != NULL && !mg_stat(fc(ctx), path, &file)) { |
---|
4947 | cry(fc(ctx), "Cannot open %s: %s", path, strerror(ERRNO)); |
---|
4948 | return 0; |
---|
4949 | } |
---|
4950 | return 1; |
---|
4951 | } |
---|
4952 | |
---|
4953 | static int set_acl_option(struct mg_context *ctx) { |
---|
4954 | return check_acl(ctx, (uint32_t) 0x7f000001UL) != -1; |
---|
4955 | } |
---|
4956 | |
---|
4957 | static void reset_per_request_attributes(struct mg_connection *conn) { |
---|
4958 | conn->path_info = NULL; |
---|
4959 | conn->num_bytes_sent = conn->consumed_content = 0; |
---|
4960 | conn->status_code = -1; |
---|
4961 | conn->must_close = conn->request_len = conn->throttle = 0; |
---|
4962 | } |
---|
4963 | |
---|
4964 | static void close_socket_gracefully(struct mg_connection *conn) { |
---|
4965 | #if defined(_WIN32) |
---|
4966 | char buf[MG_BUF_LEN]; |
---|
4967 | int n; |
---|
4968 | #endif |
---|
4969 | struct linger linger; |
---|
4970 | |
---|
4971 | // Set linger option to avoid socket hanging out after close. This prevent |
---|
4972 | // ephemeral port exhaust problem under high QPS. |
---|
4973 | linger.l_onoff = 1; |
---|
4974 | linger.l_linger = 1; |
---|
4975 | setsockopt(conn->client.sock, SOL_SOCKET, SO_LINGER, |
---|
4976 | (char *) &linger, sizeof(linger)); |
---|
4977 | |
---|
4978 | // Send FIN to the client |
---|
4979 | shutdown(conn->client.sock, SHUT_WR); |
---|
4980 | set_non_blocking_mode(conn->client.sock); |
---|
4981 | |
---|
4982 | #if defined(_WIN32) |
---|
4983 | // Read and discard pending incoming data. If we do not do that and close the |
---|
4984 | // socket, the data in the send buffer may be discarded. This |
---|
4985 | // behaviour is seen on Windows, when client keeps sending data |
---|
4986 | // when server decides to close the connection; then when client |
---|
4987 | // does recv() it gets no data back. |
---|
4988 | do { |
---|
4989 | n = pull(NULL, conn, buf, sizeof(buf)); |
---|
4990 | } while (n > 0); |
---|
4991 | #endif |
---|
4992 | |
---|
4993 | // Now we know that our FIN is ACK-ed, safe to close |
---|
4994 | closesocket(conn->client.sock); |
---|
4995 | } |
---|
4996 | |
---|
4997 | static void close_connection(struct mg_connection *conn) { |
---|
4998 | conn->must_close = 1; |
---|
4999 | |
---|
5000 | #ifndef NO_SSL |
---|
5001 | if (conn->ssl != NULL) { |
---|
5002 | // Run SSL_shutdown twice to ensure completly close SSL connection |
---|
5003 | SSL_shutdown(conn->ssl); |
---|
5004 | SSL_free(conn->ssl); |
---|
5005 | conn->ssl = NULL; |
---|
5006 | } |
---|
5007 | #endif |
---|
5008 | if (conn->client.sock != INVALID_SOCKET) { |
---|
5009 | close_socket_gracefully(conn); |
---|
5010 | conn->client.sock = INVALID_SOCKET; |
---|
5011 | } |
---|
5012 | } |
---|
5013 | |
---|
5014 | void mg_close_connection(struct mg_connection *conn) { |
---|
5015 | #ifndef NO_SSL |
---|
5016 | if (conn->client_ssl_ctx != NULL) { |
---|
5017 | SSL_CTX_free((SSL_CTX *) conn->client_ssl_ctx); |
---|
5018 | } |
---|
5019 | #endif |
---|
5020 | close_connection(conn); |
---|
5021 | free(conn); |
---|
5022 | } |
---|
5023 | |
---|
5024 | static struct mg_connection *mg_connect(const char *host, int port, int use_ssl, |
---|
5025 | char *ebuf, size_t ebuf_len) { |
---|
5026 | static struct mg_context fake_ctx; |
---|
5027 | struct mg_connection *conn = NULL; |
---|
5028 | SOCKET sock; |
---|
5029 | |
---|
5030 | if ((sock = conn2(host, port, use_ssl, ebuf, ebuf_len)) == INVALID_SOCKET) { |
---|
5031 | } else if ((conn = (struct mg_connection *) |
---|
5032 | calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE)) == NULL) { |
---|
5033 | snprintf(ebuf, ebuf_len, "calloc(): %s", strerror(ERRNO)); |
---|
5034 | closesocket(sock); |
---|
5035 | #ifndef NO_SSL |
---|
5036 | } else if (use_ssl && (conn->client_ssl_ctx = |
---|
5037 | SSL_CTX_new(SSLv23_client_method())) == NULL) { |
---|
5038 | snprintf(ebuf, ebuf_len, "SSL_CTX_new error"); |
---|
5039 | closesocket(sock); |
---|
5040 | free(conn); |
---|
5041 | conn = NULL; |
---|
5042 | #endif // NO_SSL |
---|
5043 | } else { |
---|
5044 | socklen_t len = sizeof(struct sockaddr); |
---|
5045 | conn->buf_size = MAX_REQUEST_SIZE; |
---|
5046 | conn->buf = (char *) (conn + 1); |
---|
5047 | conn->ctx = &fake_ctx; |
---|
5048 | conn->client.sock = sock; |
---|
5049 | getsockname(sock, &conn->client.rsa.sa, &len); |
---|
5050 | conn->client.is_ssl = use_ssl; |
---|
5051 | #ifndef NO_SSL |
---|
5052 | if (use_ssl) { |
---|
5053 | // SSL_CTX_set_verify call is needed to switch off server certificate |
---|
5054 | // checking, which is off by default in OpenSSL and on in yaSSL. |
---|
5055 | SSL_CTX_set_verify(conn->client_ssl_ctx, 0, 0); |
---|
5056 | sslize(conn, conn->client_ssl_ctx, SSL_connect); |
---|
5057 | } |
---|
5058 | #endif |
---|
5059 | } |
---|
5060 | |
---|
5061 | return conn; |
---|
5062 | } |
---|
5063 | |
---|
5064 | static int is_valid_uri(const char *uri) { |
---|
5065 | // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2 |
---|
5066 | // URI can be an asterisk (*) or should start with slash. |
---|
5067 | return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'); |
---|
5068 | } |
---|
5069 | |
---|
5070 | static int getreq(struct mg_connection *conn, char *ebuf, size_t ebuf_len) { |
---|
5071 | const char *cl; |
---|
5072 | |
---|
5073 | ebuf[0] = '\0'; |
---|
5074 | reset_per_request_attributes(conn); |
---|
5075 | conn->request_len = read_request(NULL, conn, conn->buf, conn->buf_size, |
---|
5076 | &conn->data_len); |
---|
5077 | assert(conn->request_len < 0 || conn->data_len >= conn->request_len); |
---|
5078 | |
---|
5079 | if (conn->request_len == 0 && conn->data_len == conn->buf_size) { |
---|
5080 | snprintf(ebuf, ebuf_len, "%s", "Request Too Large"); |
---|
5081 | } else if (conn->request_len <= 0) { |
---|
5082 | snprintf(ebuf, ebuf_len, "%s", "Client closed connection"); |
---|
5083 | } else if (parse_http_message(conn->buf, conn->buf_size, |
---|
5084 | &conn->request_info) <= 0) { |
---|
5085 | snprintf(ebuf, ebuf_len, "Bad request: [%.*s]", conn->data_len, conn->buf); |
---|
5086 | } else { |
---|
5087 | // Request is valid |
---|
5088 | if ((cl = get_header(&conn->request_info, "Content-Length")) != NULL) { |
---|
5089 | conn->content_len = strtoll(cl, NULL, 10); |
---|
5090 | } else if (!mg_strcasecmp(conn->request_info.request_method, "POST") || |
---|
5091 | !mg_strcasecmp(conn->request_info.request_method, "PUT")) { |
---|
5092 | conn->content_len = -1; |
---|
5093 | } else { |
---|
5094 | conn->content_len = 0; |
---|
5095 | } |
---|
5096 | conn->birth_time = time(NULL); |
---|
5097 | } |
---|
5098 | return ebuf[0] == '\0'; |
---|
5099 | } |
---|
5100 | |
---|
5101 | struct mg_connection *mg_download(const char *host, int port, int use_ssl, |
---|
5102 | char *ebuf, size_t ebuf_len, |
---|
5103 | const char *fmt, ...) { |
---|
5104 | struct mg_connection *conn; |
---|
5105 | va_list ap; |
---|
5106 | |
---|
5107 | va_start(ap, fmt); |
---|
5108 | ebuf[0] = '\0'; |
---|
5109 | if ((conn = mg_connect(host, port, use_ssl, ebuf, ebuf_len)) == NULL) { |
---|
5110 | } else if (mg_vprintf(conn, fmt, ap) <= 0) { |
---|
5111 | snprintf(ebuf, ebuf_len, "%s", "Error sending request"); |
---|
5112 | } else { |
---|
5113 | getreq(conn, ebuf, ebuf_len); |
---|
5114 | } |
---|
5115 | if (ebuf[0] != '\0' && conn != NULL) { |
---|
5116 | mg_close_connection(conn); |
---|
5117 | conn = NULL; |
---|
5118 | } |
---|
5119 | |
---|
5120 | return conn; |
---|
5121 | } |
---|
5122 | |
---|
5123 | static void process_new_connection(struct mg_connection *conn) { |
---|
5124 | struct mg_request_info *ri = &conn->request_info; |
---|
5125 | int keep_alive_enabled, keep_alive, discard_len; |
---|
5126 | char ebuf[100]; |
---|
5127 | |
---|
5128 | keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes"); |
---|
5129 | keep_alive = 0; |
---|
5130 | |
---|
5131 | // Important: on new connection, reset the receiving buffer. Credit goes |
---|
5132 | // to crule42. |
---|
5133 | conn->data_len = 0; |
---|
5134 | do { |
---|
5135 | if (!getreq(conn, ebuf, sizeof(ebuf))) { |
---|
5136 | send_http_error(conn, 500, "Server Error", "%s", ebuf); |
---|
5137 | conn->must_close = 1; |
---|
5138 | } else if (!is_valid_uri(conn->request_info.uri)) { |
---|
5139 | snprintf(ebuf, sizeof(ebuf), "Invalid URI: [%s]", ri->uri); |
---|
5140 | send_http_error(conn, 400, "Bad Request", "%s", ebuf); |
---|
5141 | } else if (strcmp(ri->http_version, "1.0") && |
---|
5142 | strcmp(ri->http_version, "1.1")) { |
---|
5143 | snprintf(ebuf, sizeof(ebuf), "Bad HTTP version: [%s]", ri->http_version); |
---|
5144 | send_http_error(conn, 505, "Bad HTTP version", "%s", ebuf); |
---|
5145 | } |
---|
5146 | |
---|
5147 | if (ebuf[0] == '\0') { |
---|
5148 | handle_request(conn); |
---|
5149 | if (conn->ctx->callbacks.end_request != NULL) { |
---|
5150 | conn->ctx->callbacks.end_request(conn, conn->status_code); |
---|
5151 | } |
---|
5152 | log_access(conn); |
---|
5153 | } |
---|
5154 | if (ri->remote_user != NULL) { |
---|
5155 | free((void *) ri->remote_user); |
---|
5156 | // Important! When having connections with and without auth |
---|
5157 | // would cause double free and then crash |
---|
5158 | ri->remote_user = NULL; |
---|
5159 | } |
---|
5160 | |
---|
5161 | // NOTE(lsm): order is important here. should_keep_alive() call |
---|
5162 | // is using parsed request, which will be invalid after memmove's below. |
---|
5163 | // Therefore, memorize should_keep_alive() result now for later use |
---|
5164 | // in loop exit condition. |
---|
5165 | keep_alive = conn->ctx->stop_flag == 0 && keep_alive_enabled && |
---|
5166 | conn->content_len >= 0 && should_keep_alive(conn); |
---|
5167 | |
---|
5168 | // Discard all buffered data for this request |
---|
5169 | discard_len = conn->content_len >= 0 && conn->request_len > 0 && |
---|
5170 | conn->request_len + conn->content_len < (int64_t) conn->data_len ? |
---|
5171 | (int) (conn->request_len + conn->content_len) : conn->data_len; |
---|
5172 | assert(discard_len >= 0); |
---|
5173 | memmove(conn->buf, conn->buf + discard_len, conn->data_len - discard_len); |
---|
5174 | conn->data_len -= discard_len; |
---|
5175 | assert(conn->data_len >= 0); |
---|
5176 | assert(conn->data_len <= conn->buf_size); |
---|
5177 | } while (keep_alive); |
---|
5178 | } |
---|
5179 | |
---|
5180 | // Worker threads take accepted socket from the queue |
---|
5181 | static int consume_socket(struct mg_context *ctx, struct socket *sp) { |
---|
5182 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
5183 | DEBUG_TRACE(("going idle")); |
---|
5184 | |
---|
5185 | // If the queue is empty, wait. We're idle at this point. |
---|
5186 | while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) { |
---|
5187 | pthread_cond_wait(&ctx->sq_full, &ctx->mutex); |
---|
5188 | } |
---|
5189 | |
---|
5190 | // If we're stopping, sq_head may be equal to sq_tail. |
---|
5191 | if (ctx->sq_head > ctx->sq_tail) { |
---|
5192 | // Copy socket from the queue and increment tail |
---|
5193 | *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)]; |
---|
5194 | ctx->sq_tail++; |
---|
5195 | DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock)); |
---|
5196 | |
---|
5197 | // Wrap pointers if needed |
---|
5198 | while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) { |
---|
5199 | ctx->sq_tail -= ARRAY_SIZE(ctx->queue); |
---|
5200 | ctx->sq_head -= ARRAY_SIZE(ctx->queue); |
---|
5201 | } |
---|
5202 | } |
---|
5203 | |
---|
5204 | (void) pthread_cond_signal(&ctx->sq_empty); |
---|
5205 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
5206 | |
---|
5207 | return !ctx->stop_flag; |
---|
5208 | } |
---|
5209 | |
---|
5210 | static void *worker_thread(void *thread_func_param) { |
---|
5211 | struct mg_context *ctx = (struct mg_context *) thread_func_param; |
---|
5212 | struct mg_connection *conn; |
---|
5213 | |
---|
5214 | conn = (struct mg_connection *) calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE); |
---|
5215 | if (conn == NULL) { |
---|
5216 | cry(fc(ctx), "%s", "Cannot create new connection struct, OOM"); |
---|
5217 | } else { |
---|
5218 | conn->buf_size = MAX_REQUEST_SIZE; |
---|
5219 | conn->buf = (char *) (conn + 1); |
---|
5220 | conn->ctx = ctx; |
---|
5221 | conn->request_info.user_data = ctx->user_data; |
---|
5222 | |
---|
5223 | // Call consume_socket() even when ctx->stop_flag > 0, to let it signal |
---|
5224 | // sq_empty condvar to wake up the master waiting in produce_socket() |
---|
5225 | while (consume_socket(ctx, &conn->client)) { |
---|
5226 | conn->birth_time = time(NULL); |
---|
5227 | |
---|
5228 | // Fill in IP, port info early so even if SSL setup below fails, |
---|
5229 | // error handler would have the corresponding info. |
---|
5230 | // Thanks to Johannes Winkelmann for the patch. |
---|
5231 | // TODO(lsm): Fix IPv6 case |
---|
5232 | conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port); |
---|
5233 | memcpy(&conn->request_info.remote_ip, |
---|
5234 | &conn->client.rsa.sin.sin_addr.s_addr, 4); |
---|
5235 | conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip); |
---|
5236 | conn->request_info.is_ssl = conn->client.is_ssl; |
---|
5237 | |
---|
5238 | if (!conn->client.is_ssl |
---|
5239 | #ifndef NO_SSL |
---|
5240 | || sslize(conn, conn->ctx->ssl_ctx, SSL_accept) |
---|
5241 | #endif |
---|
5242 | ) { |
---|
5243 | process_new_connection(conn); |
---|
5244 | } |
---|
5245 | |
---|
5246 | close_connection(conn); |
---|
5247 | } |
---|
5248 | free(conn); |
---|
5249 | } |
---|
5250 | |
---|
5251 | // Signal master that we're done with connection and exiting |
---|
5252 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
5253 | ctx->num_threads--; |
---|
5254 | (void) pthread_cond_signal(&ctx->cond); |
---|
5255 | assert(ctx->num_threads >= 0); |
---|
5256 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
5257 | |
---|
5258 | DEBUG_TRACE(("exiting")); |
---|
5259 | return NULL; |
---|
5260 | } |
---|
5261 | |
---|
5262 | // Master thread adds accepted socket to a queue |
---|
5263 | static void produce_socket(struct mg_context *ctx, const struct socket *sp) { |
---|
5264 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
5265 | |
---|
5266 | // If the queue is full, wait |
---|
5267 | while (ctx->stop_flag == 0 && |
---|
5268 | ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) { |
---|
5269 | (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex); |
---|
5270 | } |
---|
5271 | |
---|
5272 | if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) { |
---|
5273 | // Copy socket to the queue and increment head |
---|
5274 | ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp; |
---|
5275 | ctx->sq_head++; |
---|
5276 | DEBUG_TRACE(("queued socket %d", sp->sock)); |
---|
5277 | } |
---|
5278 | |
---|
5279 | (void) pthread_cond_signal(&ctx->sq_full); |
---|
5280 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
5281 | } |
---|
5282 | |
---|
5283 | static int set_sock_timeout(SOCKET sock, int milliseconds) { |
---|
5284 | #ifdef _WIN32 |
---|
5285 | DWORD t = milliseconds; |
---|
5286 | #else |
---|
5287 | struct timeval t; |
---|
5288 | t.tv_sec = milliseconds / 1000; |
---|
5289 | t.tv_usec = (milliseconds * 1000) % 1000000; |
---|
5290 | #endif |
---|
5291 | return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *) &t, sizeof(t)) || |
---|
5292 | setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (void *) &t, sizeof(t)); |
---|
5293 | } |
---|
5294 | |
---|
5295 | static void accept_new_connection(const struct socket *listener, |
---|
5296 | struct mg_context *ctx) { |
---|
5297 | struct socket so; |
---|
5298 | char src_addr[IP_ADDR_STR_LEN]; |
---|
5299 | socklen_t len = sizeof(so.rsa); |
---|
5300 | int on = 1; |
---|
5301 | |
---|
5302 | if ((so.sock = accept(listener->sock, &so.rsa.sa, &len)) == INVALID_SOCKET) { |
---|
5303 | } else if (!check_acl(ctx, ntohl(* (uint32_t *) &so.rsa.sin.sin_addr))) { |
---|
5304 | sockaddr_to_string(src_addr, sizeof(src_addr), &so.rsa); |
---|
5305 | cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr); |
---|
5306 | closesocket(so.sock); |
---|
5307 | } else { |
---|
5308 | // Put so socket structure into the queue |
---|
5309 | DEBUG_TRACE(("Accepted socket %d", (int) so.sock)); |
---|
5310 | set_close_on_exec(so.sock); |
---|
5311 | so.is_ssl = listener->is_ssl; |
---|
5312 | so.ssl_redir = listener->ssl_redir; |
---|
5313 | getsockname(so.sock, &so.lsa.sa, &len); |
---|
5314 | // Set TCP keep-alive. This is needed because if HTTP-level keep-alive |
---|
5315 | // is enabled, and client resets the connection, server won't get |
---|
5316 | // TCP FIN or RST and will keep the connection open forever. With TCP |
---|
5317 | // keep-alive, next keep-alive handshake will figure out that the client |
---|
5318 | // is down and will close the server end. |
---|
5319 | // Thanks to Igor Klopov who suggested the patch. |
---|
5320 | setsockopt(so.sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on, sizeof(on)); |
---|
5321 | set_sock_timeout(so.sock, atoi(ctx->config[REQUEST_TIMEOUT])); |
---|
5322 | produce_socket(ctx, &so); |
---|
5323 | } |
---|
5324 | } |
---|
5325 | |
---|
5326 | static void *master_thread(void *thread_func_param) { |
---|
5327 | struct mg_context *ctx = (struct mg_context *) thread_func_param; |
---|
5328 | struct pollfd *pfd; |
---|
5329 | int i; |
---|
5330 | |
---|
5331 | // Increase priority of the master thread |
---|
5332 | #if defined(_WIN32) |
---|
5333 | SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL); |
---|
5334 | #endif |
---|
5335 | |
---|
5336 | #if defined(ISSUE_317) |
---|
5337 | struct sched_param sched_param; |
---|
5338 | sched_param.sched_priority = sched_get_priority_max(SCHED_RR); |
---|
5339 | pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param); |
---|
5340 | #endif |
---|
5341 | |
---|
5342 | pfd = (struct pollfd *) calloc(ctx->num_listening_sockets, sizeof(pfd[0])); |
---|
5343 | while (pfd != NULL && ctx->stop_flag == 0) { |
---|
5344 | for (i = 0; i < ctx->num_listening_sockets; i++) { |
---|
5345 | pfd[i].fd = ctx->listening_sockets[i].sock; |
---|
5346 | pfd[i].events = POLLIN; |
---|
5347 | } |
---|
5348 | |
---|
5349 | if (poll(pfd, ctx->num_listening_sockets, 200) > 0) { |
---|
5350 | for (i = 0; i < ctx->num_listening_sockets; i++) { |
---|
5351 | // NOTE(lsm): on QNX, poll() returns POLLRDNORM after the |
---|
5352 | // successfull poll, and POLLIN is defined as (POLLRDNORM | POLLRDBAND) |
---|
5353 | // Therefore, we're checking pfd[i].revents & POLLIN, not |
---|
5354 | // pfd[i].revents == POLLIN. |
---|
5355 | if (ctx->stop_flag == 0 && (pfd[i].revents & POLLIN)) { |
---|
5356 | accept_new_connection(&ctx->listening_sockets[i], ctx); |
---|
5357 | } |
---|
5358 | } |
---|
5359 | } |
---|
5360 | } |
---|
5361 | free(pfd); |
---|
5362 | DEBUG_TRACE(("stopping workers")); |
---|
5363 | |
---|
5364 | // Stop signal received: somebody called mg_stop. Quit. |
---|
5365 | close_all_listening_sockets(ctx); |
---|
5366 | |
---|
5367 | // Wakeup workers that are waiting for connections to handle. |
---|
5368 | pthread_cond_broadcast(&ctx->sq_full); |
---|
5369 | |
---|
5370 | // Wait until all threads finish |
---|
5371 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
5372 | while (ctx->num_threads > 0) { |
---|
5373 | (void) pthread_cond_wait(&ctx->cond, &ctx->mutex); |
---|
5374 | } |
---|
5375 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
5376 | |
---|
5377 | // All threads exited, no sync is needed. Destroy mutex and condvars |
---|
5378 | (void) pthread_mutex_destroy(&ctx->mutex); |
---|
5379 | (void) pthread_cond_destroy(&ctx->cond); |
---|
5380 | (void) pthread_cond_destroy(&ctx->sq_empty); |
---|
5381 | (void) pthread_cond_destroy(&ctx->sq_full); |
---|
5382 | |
---|
5383 | #if !defined(NO_SSL) |
---|
5384 | uninitialize_ssl(ctx); |
---|
5385 | #endif |
---|
5386 | DEBUG_TRACE(("exiting")); |
---|
5387 | |
---|
5388 | // Signal mg_stop() that we're done. |
---|
5389 | // WARNING: This must be the very last thing this |
---|
5390 | // thread does, as ctx becomes invalid after this line. |
---|
5391 | ctx->stop_flag = 2; |
---|
5392 | return NULL; |
---|
5393 | } |
---|
5394 | |
---|
5395 | static void free_context(struct mg_context *ctx) { |
---|
5396 | int i; |
---|
5397 | |
---|
5398 | // Deallocate config parameters |
---|
5399 | for (i = 0; i < NUM_OPTIONS; i++) { |
---|
5400 | if (ctx->config[i] != NULL) |
---|
5401 | free(ctx->config[i]); |
---|
5402 | } |
---|
5403 | |
---|
5404 | #ifndef NO_SSL |
---|
5405 | // Deallocate SSL context |
---|
5406 | if (ctx->ssl_ctx != NULL) { |
---|
5407 | SSL_CTX_free(ctx->ssl_ctx); |
---|
5408 | } |
---|
5409 | if (ssl_mutexes != NULL) { |
---|
5410 | free(ssl_mutexes); |
---|
5411 | ssl_mutexes = NULL; |
---|
5412 | } |
---|
5413 | #endif // !NO_SSL |
---|
5414 | |
---|
5415 | // Deallocate context itself |
---|
5416 | free(ctx); |
---|
5417 | } |
---|
5418 | |
---|
5419 | void mg_stop(struct mg_context *ctx) { |
---|
5420 | ctx->stop_flag = 1; |
---|
5421 | |
---|
5422 | // Wait until mg_fini() stops |
---|
5423 | while (ctx->stop_flag != 2) { |
---|
5424 | (void) mg_sleep(10); |
---|
5425 | } |
---|
5426 | free_context(ctx); |
---|
5427 | |
---|
5428 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
5429 | (void) WSACleanup(); |
---|
5430 | #endif // _WIN32 |
---|
5431 | } |
---|
5432 | |
---|
5433 | struct mg_context *mg_start(const struct mg_callbacks *callbacks, |
---|
5434 | void *user_data, |
---|
5435 | const char **options) { |
---|
5436 | struct mg_context *ctx; |
---|
5437 | const char *name, *value, *default_value; |
---|
5438 | int i; |
---|
5439 | |
---|
5440 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
5441 | WSADATA data; |
---|
5442 | WSAStartup(MAKEWORD(2,2), &data); |
---|
5443 | InitializeCriticalSection(&global_log_file_lock); |
---|
5444 | #endif // _WIN32 |
---|
5445 | |
---|
5446 | // Allocate context and initialize reasonable general case defaults. |
---|
5447 | // TODO(lsm): do proper error handling here. |
---|
5448 | if ((ctx = (struct mg_context *) calloc(1, sizeof(*ctx))) == NULL) { |
---|
5449 | return NULL; |
---|
5450 | } |
---|
5451 | ctx->callbacks = *callbacks; |
---|
5452 | ctx->user_data = user_data; |
---|
5453 | |
---|
5454 | while (options && (name = *options++) != NULL) { |
---|
5455 | if ((i = get_option_index(name)) == -1) { |
---|
5456 | cry(fc(ctx), "Invalid option: %s", name); |
---|
5457 | free_context(ctx); |
---|
5458 | return NULL; |
---|
5459 | } else if ((value = *options++) == NULL) { |
---|
5460 | cry(fc(ctx), "%s: option value cannot be NULL", name); |
---|
5461 | free_context(ctx); |
---|
5462 | return NULL; |
---|
5463 | } |
---|
5464 | if (ctx->config[i] != NULL) { |
---|
5465 | cry(fc(ctx), "warning: %s: duplicate option", name); |
---|
5466 | free(ctx->config[i]); |
---|
5467 | } |
---|
5468 | ctx->config[i] = mg_strdup(value); |
---|
5469 | DEBUG_TRACE(("[%s] -> [%s]", name, value)); |
---|
5470 | } |
---|
5471 | |
---|
5472 | // Set default value if needed |
---|
5473 | for (i = 0; config_options[i * 2] != NULL; i++) { |
---|
5474 | default_value = config_options[i * 2 + 1]; |
---|
5475 | if (ctx->config[i] == NULL && default_value != NULL) { |
---|
5476 | ctx->config[i] = mg_strdup(default_value); |
---|
5477 | } |
---|
5478 | } |
---|
5479 | |
---|
5480 | // NOTE(lsm): order is important here. SSL certificates must |
---|
5481 | // be initialized before listening ports. UID must be set last. |
---|
5482 | if (!set_gpass_option(ctx) || |
---|
5483 | #if !defined(NO_SSL) |
---|
5484 | !set_ssl_option(ctx) || |
---|
5485 | #endif |
---|
5486 | !set_ports_option(ctx) || |
---|
5487 | #if !defined(_WIN32) |
---|
5488 | !set_uid_option(ctx) || |
---|
5489 | #endif |
---|
5490 | !set_acl_option(ctx)) { |
---|
5491 | free_context(ctx); |
---|
5492 | return NULL; |
---|
5493 | } |
---|
5494 | |
---|
5495 | #if !defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
5496 | // Ignore SIGPIPE signal, so if browser cancels the request, it |
---|
5497 | // won't kill the whole process. |
---|
5498 | (void) signal(SIGPIPE, SIG_IGN); |
---|
5499 | // Also ignoring SIGCHLD to let the OS to reap zombies properly. |
---|
5500 | (void) signal(SIGCHLD, SIG_IGN); |
---|
5501 | #endif // !_WIN32 |
---|
5502 | |
---|
5503 | (void) pthread_mutex_init(&ctx->mutex, NULL); |
---|
5504 | (void) pthread_cond_init(&ctx->cond, NULL); |
---|
5505 | (void) pthread_cond_init(&ctx->sq_empty, NULL); |
---|
5506 | (void) pthread_cond_init(&ctx->sq_full, NULL); |
---|
5507 | |
---|
5508 | // Start master (listening) thread |
---|
5509 | mg_start_thread(master_thread, ctx); |
---|
5510 | |
---|
5511 | // Start worker threads |
---|
5512 | for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) { |
---|
5513 | if (mg_start_thread(worker_thread, ctx) != 0) { |
---|
5514 | cry(fc(ctx), "Cannot start worker thread: %ld", (long) ERRNO); |
---|
5515 | } else { |
---|
5516 | ctx->num_threads++; |
---|
5517 | } |
---|
5518 | } |
---|
5519 | |
---|
5520 | return ctx; |
---|
5521 | } |
---|