1 | // Copyright (c) 2004-2011 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 | #define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005 |
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32 | #else |
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33 | #define _XOPEN_SOURCE 600 // For flockfile() on Linux |
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34 | #define _LARGEFILE_SOURCE // Enable 64-bit file offsets |
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35 | #define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++ |
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36 | #define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX |
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37 | #endif |
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38 | |
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39 | #if defined(__SYMBIAN32__) |
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40 | #define NO_SSL // SSL is not supported |
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41 | #define NO_CGI // CGI is not supported |
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42 | #define PATH_MAX FILENAME_MAX |
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43 | #endif // __SYMBIAN32__ |
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44 | |
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45 | #ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE |
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46 | #include <sys/types.h> |
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47 | #include <sys/stat.h> |
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48 | #include <errno.h> |
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49 | #include <signal.h> |
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50 | #include <fcntl.h> |
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51 | #endif // !_WIN32_WCE |
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52 | |
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53 | #include <time.h> |
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54 | #include <stdlib.h> |
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55 | #include <stdarg.h> |
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56 | #include <assert.h> |
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57 | #include <string.h> |
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58 | #include <ctype.h> |
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59 | #include <limits.h> |
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60 | #include <stddef.h> |
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61 | #include <stdio.h> |
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62 | |
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63 | #if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific |
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64 | #define _WIN32_WINNT 0x0400 // To make it link in VS2005 |
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65 | #include <windows.h> |
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66 | |
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67 | #ifndef PATH_MAX |
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68 | #define PATH_MAX MAX_PATH |
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69 | #endif |
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70 | |
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71 | #ifndef _WIN32_WCE |
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72 | #include <process.h> |
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73 | #include <direct.h> |
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74 | #include <io.h> |
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75 | #else // _WIN32_WCE |
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76 | #include <winsock2.h> |
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77 | #include <ws2tcpip.h> |
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78 | #define NO_CGI // WinCE has no pipes |
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79 | |
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80 | typedef long off_t; |
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81 | #define BUFSIZ 4096 |
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82 | |
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83 | #define errno GetLastError() |
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84 | #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) |
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85 | #endif // _WIN32_WCE |
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86 | |
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87 | #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ |
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88 | ((uint64_t)((uint32_t)(hi))) << 32)) |
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89 | #define RATE_DIFF 10000000 // 100 nsecs |
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90 | #define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de) |
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91 | #define SYS2UNIX_TIME(lo, hi) \ |
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92 | (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) |
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93 | |
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94 | // Visual Studio 6 does not know __func__ or __FUNCTION__ |
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95 | // The rest of MS compilers use __FUNCTION__, not C99 __func__ |
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96 | // Also use _strtoui64 on modern M$ compilers |
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97 | #if defined(_MSC_VER) && _MSC_VER < 1300 |
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98 | #define STRX(x) #x |
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99 | #define STR(x) STRX(x) |
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100 | #define __func__ "line " STR(__LINE__) |
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101 | #define strtoull(x, y, z) strtoul(x, y, z) |
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102 | #define strtoll(x, y, z) strtol(x, y, z) |
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103 | #else |
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104 | #define __func__ __FUNCTION__ |
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105 | #define strtoull(x, y, z) _strtoui64(x, y, z) |
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106 | #define strtoll(x, y, z) _strtoi64(x, y, z) |
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107 | #endif // _MSC_VER |
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108 | |
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109 | #define ERRNO GetLastError() |
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110 | #define NO_SOCKLEN_T |
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111 | #define SSL_LIB "ssleay32.dll" |
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112 | #define CRYPTO_LIB "libeay32.dll" |
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113 | #define DIRSEP '\\' |
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114 | #define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\') |
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115 | #define O_NONBLOCK 0 |
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116 | #if !defined(EWOULDBLOCK) |
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117 | #define EWOULDBLOCK WSAEWOULDBLOCK |
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118 | #endif // !EWOULDBLOCK |
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119 | #define _POSIX_ |
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120 | #define INT64_FMT "I64d" |
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121 | |
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122 | #define WINCDECL __cdecl |
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123 | #define SHUT_WR 1 |
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124 | #define snprintf _snprintf |
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125 | #define vsnprintf _vsnprintf |
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126 | #define mg_sleep(x) Sleep(x) |
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127 | |
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128 | #define pipe(x) _pipe(x, BUFSIZ, _O_BINARY) |
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129 | #define popen(x, y) _popen(x, y) |
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130 | #define pclose(x) _pclose(x) |
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131 | #define close(x) _close(x) |
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132 | #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) |
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133 | #define RTLD_LAZY 0 |
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134 | #define fseeko(x, y, z) fseek((x), (y), (z)) |
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135 | #define fdopen(x, y) _fdopen((x), (y)) |
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136 | #define write(x, y, z) _write((x), (y), (unsigned) z) |
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137 | #define read(x, y, z) _read((x), (y), (unsigned) z) |
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138 | #define flockfile(x) EnterCriticalSection(&global_log_file_lock) |
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139 | #define funlockfile(x) LeaveCriticalSection(&global_log_file_lock) |
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140 | |
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141 | #if !defined(fileno) |
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142 | #define fileno(x) _fileno(x) |
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143 | #endif // !fileno MINGW #defines fileno |
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144 | |
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145 | typedef HANDLE pthread_mutex_t; |
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146 | typedef struct {HANDLE signal, broadcast;} pthread_cond_t; |
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147 | typedef DWORD pthread_t; |
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148 | #define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here. |
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149 | |
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150 | struct timespec { |
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151 | long tv_nsec; |
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152 | long tv_sec; |
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153 | }; |
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154 | |
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155 | static int pthread_mutex_lock(pthread_mutex_t *); |
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156 | static int pthread_mutex_unlock(pthread_mutex_t *); |
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157 | static FILE *mg_fopen(const char *path, const char *mode); |
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158 | |
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159 | #if defined(HAVE_STDINT) |
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160 | #include <stdint.h> |
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161 | #else |
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162 | typedef unsigned int uint32_t; |
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163 | typedef unsigned short uint16_t; |
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164 | typedef unsigned __int64 uint64_t; |
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165 | typedef __int64 int64_t; |
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166 | #define INT64_MAX 9223372036854775807 |
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167 | #endif // HAVE_STDINT |
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168 | |
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169 | // POSIX dirent interface |
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170 | struct dirent { |
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171 | char d_name[PATH_MAX]; |
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172 | }; |
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173 | |
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174 | typedef struct DIR { |
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175 | HANDLE handle; |
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176 | WIN32_FIND_DATAW info; |
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177 | struct dirent result; |
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178 | } DIR; |
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179 | |
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180 | #else // UNIX specific |
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181 | #include <sys/wait.h> |
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182 | #include <sys/socket.h> |
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183 | #include <sys/select.h> |
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184 | #include <netinet/in.h> |
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185 | #include <arpa/inet.h> |
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186 | #include <sys/time.h> |
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187 | #include <stdint.h> |
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188 | #include <inttypes.h> |
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189 | #include <netdb.h> |
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190 | |
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191 | #include <pwd.h> |
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192 | #include <unistd.h> |
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193 | #include <dirent.h> |
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194 | #if !defined(NO_SSL_DL) && !defined(NO_SSL) |
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195 | #include <dlfcn.h> |
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196 | #endif |
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197 | #include <pthread.h> |
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198 | #if defined(__MACH__) |
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199 | #define SSL_LIB "libssl.dylib" |
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200 | #define CRYPTO_LIB "libcrypto.dylib" |
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201 | #else |
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202 | #if !defined(SSL_LIB) |
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203 | #define SSL_LIB "libssl.so" |
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204 | #endif |
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205 | #if !defined(CRYPTO_LIB) |
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206 | #define CRYPTO_LIB "libcrypto.so" |
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207 | #endif |
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208 | #endif |
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209 | #define DIRSEP '/' |
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210 | #define IS_DIRSEP_CHAR(c) ((c) == '/') |
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211 | #ifndef O_BINARY |
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212 | #define O_BINARY 0 |
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213 | #endif // O_BINARY |
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214 | #define closesocket(a) close(a) |
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215 | #define mg_fopen(x, y) fopen(x, y) |
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216 | #define mg_mkdir(x, y) mkdir(x, y) |
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217 | #define mg_remove(x) remove(x) |
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218 | #define mg_rename(x, y) rename(x, y) |
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219 | #define mg_sleep(x) usleep((x) * 1000) |
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220 | #define ERRNO errno |
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221 | #define INVALID_SOCKET (-1) |
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222 | #define INT64_FMT PRId64 |
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223 | typedef int SOCKET; |
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224 | #define WINCDECL |
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225 | |
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226 | #endif // End of Windows and UNIX specific includes |
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227 | |
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228 | #include "mongoose.h" |
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229 | |
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230 | #define MONGOOSE_VERSION "3.2" |
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231 | #define PASSWORDS_FILE_NAME ".htpasswd" |
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232 | #define CGI_ENVIRONMENT_SIZE 4096 |
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233 | #define MAX_CGI_ENVIR_VARS 64 |
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234 | #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) |
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235 | |
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236 | #ifdef _WIN32 |
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237 | static CRITICAL_SECTION global_log_file_lock; |
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238 | static pthread_t pthread_self(void) { |
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239 | return GetCurrentThreadId(); |
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240 | } |
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241 | #endif // _WIN32 |
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242 | |
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243 | #if defined(DEBUG) |
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244 | #define DEBUG_TRACE(x) do { \ |
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245 | flockfile(stdout); \ |
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246 | printf("*** %lu.%p.%s.%d: ", \ |
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247 | (unsigned long) time(NULL), (void *) pthread_self(), \ |
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248 | __func__, __LINE__); \ |
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249 | printf x; \ |
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250 | putchar('\n'); \ |
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251 | fflush(stdout); \ |
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252 | funlockfile(stdout); \ |
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253 | } while (0) |
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254 | #else |
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255 | #define DEBUG_TRACE(x) |
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256 | #endif // DEBUG |
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257 | |
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258 | // Darwin prior to 7.0 and Win32 do not have socklen_t |
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259 | #ifdef NO_SOCKLEN_T |
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260 | typedef int socklen_t; |
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261 | #endif // NO_SOCKLEN_T |
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262 | |
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263 | #if !defined(MSG_NOSIGNAL) |
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264 | #define MSG_NOSIGNAL 0 |
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265 | #endif |
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266 | |
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267 | typedef void * (*mg_thread_func_t)(void *); |
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268 | |
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269 | static const char *http_500_error = "Internal Server Error"; |
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270 | |
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271 | // Snatched from OpenSSL includes. I put the prototypes here to be independent |
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272 | // from the OpenSSL source installation. Having this, mongoose + SSL can be |
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273 | // built on any system with binary SSL libraries installed. |
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274 | typedef struct ssl_st SSL; |
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275 | typedef struct ssl_method_st SSL_METHOD; |
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276 | typedef struct ssl_ctx_st SSL_CTX; |
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277 | |
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278 | #define SSL_ERROR_WANT_READ 2 |
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279 | #define SSL_ERROR_WANT_WRITE 3 |
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280 | #define SSL_FILETYPE_PEM 1 |
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281 | #define CRYPTO_LOCK 1 |
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282 | |
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283 | #if defined(NO_SSL_DL) |
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284 | extern void SSL_free(SSL *); |
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285 | extern int SSL_accept(SSL *); |
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286 | extern int SSL_connect(SSL *); |
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287 | extern int SSL_read(SSL *, void *, int); |
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288 | extern int SSL_write(SSL *, const void *, int); |
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289 | extern int SSL_get_error(const SSL *, int); |
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290 | extern int SSL_set_fd(SSL *, int); |
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291 | extern SSL *SSL_new(SSL_CTX *); |
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292 | extern SSL_CTX *SSL_CTX_new(SSL_METHOD *); |
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293 | extern SSL_METHOD *SSLv23_server_method(void); |
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294 | extern int SSL_library_init(void); |
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295 | extern void SSL_load_error_strings(void); |
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296 | extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int); |
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297 | extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int); |
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298 | extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *); |
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299 | extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t); |
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300 | extern void SSL_CTX_free(SSL_CTX *); |
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301 | extern unsigned long ERR_get_error(void); |
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302 | extern char *ERR_error_string(unsigned long, char *); |
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303 | extern int CRYPTO_num_locks(void); |
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304 | extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int)); |
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305 | extern void CRYPTO_set_id_callback(unsigned long (*)(void)); |
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306 | #else |
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307 | // Dynamically loaded SSL functionality |
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308 | struct ssl_func { |
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309 | const char *name; // SSL function name |
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310 | void (*ptr)(void); // Function pointer |
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311 | }; |
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312 | |
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313 | #define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr) |
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314 | #define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr) |
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315 | #define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr) |
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316 | #define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr) |
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317 | #define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr) |
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318 | #define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr) |
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319 | #define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr) |
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320 | #define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr) |
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321 | #define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr) |
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322 | #define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr) |
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323 | #define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr) |
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324 | #define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \ |
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325 | const char *, int)) ssl_sw[11].ptr) |
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326 | #define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \ |
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327 | const char *, int)) ssl_sw[12].ptr) |
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328 | #define SSL_CTX_set_default_passwd_cb \ |
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329 | (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr) |
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330 | #define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr) |
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331 | #define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr) |
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332 | #define SSL_CTX_use_certificate_chain_file \ |
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333 | (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr) |
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334 | |
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335 | #define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr) |
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336 | #define CRYPTO_set_locking_callback \ |
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337 | (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr) |
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338 | #define CRYPTO_set_id_callback \ |
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339 | (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr) |
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340 | #define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr) |
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341 | #define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr) |
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342 | |
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343 | // set_ssl_option() function updates this array. |
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344 | // It loads SSL library dynamically and changes NULLs to the actual addresses |
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345 | // of respective functions. The macros above (like SSL_connect()) are really |
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346 | // just calling these functions indirectly via the pointer. |
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347 | static struct ssl_func ssl_sw[] = { |
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348 | {"SSL_free", NULL}, |
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349 | {"SSL_accept", NULL}, |
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350 | {"SSL_connect", NULL}, |
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351 | {"SSL_read", NULL}, |
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352 | {"SSL_write", NULL}, |
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353 | {"SSL_get_error", NULL}, |
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354 | {"SSL_set_fd", NULL}, |
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355 | {"SSL_new", NULL}, |
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356 | {"SSL_CTX_new", NULL}, |
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357 | {"SSLv23_server_method", NULL}, |
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358 | {"SSL_library_init", NULL}, |
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359 | {"SSL_CTX_use_PrivateKey_file", NULL}, |
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360 | {"SSL_CTX_use_certificate_file",NULL}, |
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361 | {"SSL_CTX_set_default_passwd_cb",NULL}, |
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362 | {"SSL_CTX_free", NULL}, |
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363 | {"SSL_load_error_strings", NULL}, |
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364 | {"SSL_CTX_use_certificate_chain_file", NULL}, |
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365 | {NULL, NULL} |
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366 | }; |
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367 | |
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368 | // Similar array as ssl_sw. These functions could be located in different lib. |
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369 | #if !defined(NO_SSL) |
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370 | static struct ssl_func crypto_sw[] = { |
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371 | {"CRYPTO_num_locks", NULL}, |
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372 | {"CRYPTO_set_locking_callback", NULL}, |
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373 | {"CRYPTO_set_id_callback", NULL}, |
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374 | {"ERR_get_error", NULL}, |
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375 | {"ERR_error_string", NULL}, |
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376 | {NULL, NULL} |
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377 | }; |
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378 | #endif // NO_SSL |
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379 | #endif // NO_SSL_DL |
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380 | |
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381 | static const char *month_names[] = { |
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382 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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383 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
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384 | }; |
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385 | |
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386 | // Unified socket address. For IPv6 support, add IPv6 address structure |
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387 | // in the union u. |
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388 | union usa { |
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389 | struct sockaddr sa; |
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390 | struct sockaddr_in sin; |
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391 | #if defined(USE_IPV6) |
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392 | struct sockaddr_in6 sin6; |
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393 | #endif |
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394 | }; |
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395 | |
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396 | // Describes a string (chunk of memory). |
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397 | struct vec { |
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398 | const char *ptr; |
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399 | size_t len; |
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400 | }; |
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401 | |
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402 | // Structure used by mg_stat() function. Uses 64 bit file length. |
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403 | struct mgstat { |
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404 | int is_directory; // Directory marker |
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405 | int64_t size; // File size |
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406 | time_t mtime; // Modification time |
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407 | }; |
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408 | |
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409 | // Describes listening socket, or socket which was accept()-ed by the master |
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410 | // thread and queued for future handling by the worker thread. |
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411 | struct socket { |
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412 | struct socket *next; // Linkage |
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413 | SOCKET sock; // Listening socket |
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414 | union usa lsa; // Local socket address |
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415 | union usa rsa; // Remote socket address |
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416 | int is_ssl; // Is socket SSL-ed |
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417 | }; |
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418 | |
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419 | enum { |
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420 | CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER, |
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421 | PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE, |
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422 | SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE, |
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423 | GLOBAL_PASSWORDS_FILE, INDEX_FILES, |
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424 | ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE, |
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425 | EXTRA_MIME_TYPES, LISTENING_PORTS, |
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426 | DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER, REWRITE, |
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427 | THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_POLICY, |
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428 | NUM_OPTIONS |
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429 | }; |
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430 | |
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431 | static const char *config_options[] = { |
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432 | "C", "cgi_pattern", "**.cgi$|**.pl$|**.php$", |
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433 | "E", "cgi_environment", NULL, |
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434 | "G", "put_delete_passwords_file", NULL, |
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435 | "I", "cgi_interpreter", NULL, |
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436 | "P", "protect_uri", NULL, |
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437 | "R", "authentication_domain", "mydomain.com", |
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438 | "S", "ssi_pattern", "**.shtml$|**.shtm$", |
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439 | "a", "access_log_file", NULL, |
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440 | "c", "ssl_chain_file", NULL, |
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441 | "d", "enable_directory_listing", "yes", |
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442 | "e", "error_log_file", NULL, |
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443 | "g", "global_passwords_file", NULL, |
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444 | "i", "index_files", "index.html,index.htm,index.cgi,index.shtml,index.php", |
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445 | "k", "enable_keep_alive", "no", |
---|
446 | "l", "access_control_list", NULL, |
---|
447 | "M", "max_request_size", "16384", |
---|
448 | "m", "extra_mime_types", NULL, |
---|
449 | "p", "listening_ports", "8080", |
---|
450 | "r", "document_root", ".", |
---|
451 | "s", "ssl_certificate", NULL, |
---|
452 | "t", "num_threads", "10", |
---|
453 | "u", "run_as_user", NULL, |
---|
454 | "w", "url_rewrite_patterns", NULL, |
---|
455 | "x", "thread_stack_size", NULL, |
---|
456 | "y", "thread_priority", NULL, |
---|
457 | "z", "thread_policy", NULL, |
---|
458 | NULL |
---|
459 | }; |
---|
460 | #define ENTRIES_PER_CONFIG_OPTION 3 |
---|
461 | |
---|
462 | struct mg_context { |
---|
463 | volatile int stop_flag; // Should we stop event loop |
---|
464 | SSL_CTX *ssl_ctx; // SSL context |
---|
465 | char *config[NUM_OPTIONS]; // Mongoose configuration parameters |
---|
466 | mg_callback_t user_callback; // User-defined callback function |
---|
467 | void *user_data; // User-defined data |
---|
468 | |
---|
469 | struct socket *listening_sockets; |
---|
470 | |
---|
471 | volatile int num_threads; // Number of threads |
---|
472 | pthread_mutex_t mutex; // Protects (max|num)_threads |
---|
473 | pthread_cond_t cond; // Condvar for tracking workers terminations |
---|
474 | |
---|
475 | struct socket queue[20]; // Accepted sockets |
---|
476 | volatile int sq_head; // Head of the socket queue |
---|
477 | volatile int sq_tail; // Tail of the socket queue |
---|
478 | pthread_cond_t sq_full; // Singaled when socket is produced |
---|
479 | pthread_cond_t sq_empty; // Signaled when socket is consumed |
---|
480 | }; |
---|
481 | |
---|
482 | struct mg_connection { |
---|
483 | struct mg_request_info request_info; |
---|
484 | struct mg_context *ctx; |
---|
485 | SSL *ssl; // SSL descriptor |
---|
486 | struct socket client; // Connected client |
---|
487 | time_t birth_time; // Time connection was accepted |
---|
488 | int64_t num_bytes_sent; // Total bytes sent to client |
---|
489 | int64_t content_len; // Content-Length header value |
---|
490 | int64_t consumed_content; // How many bytes of content is already read |
---|
491 | char *buf; // Buffer for received data |
---|
492 | char *path_info; // PATH_INFO part of the URL |
---|
493 | int must_close; // 1 if connection must be closed |
---|
494 | int buf_size; // Buffer size |
---|
495 | int request_len; // Size of the request + headers in a buffer |
---|
496 | int data_len; // Total size of data in a buffer |
---|
497 | }; |
---|
498 | |
---|
499 | const char **mg_get_valid_option_names(void) { |
---|
500 | return config_options; |
---|
501 | } |
---|
502 | |
---|
503 | static void *call_user(struct mg_connection *conn, enum mg_event event) { |
---|
504 | conn->request_info.user_data = conn->ctx->user_data; |
---|
505 | return conn->ctx->user_callback == NULL ? NULL : |
---|
506 | conn->ctx->user_callback(event, conn, &conn->request_info); |
---|
507 | } |
---|
508 | |
---|
509 | static int get_option_index(const char *name) { |
---|
510 | int i; |
---|
511 | |
---|
512 | for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) { |
---|
513 | if (strcmp(config_options[i], name) == 0 || |
---|
514 | strcmp(config_options[i + 1], name) == 0) { |
---|
515 | return i / ENTRIES_PER_CONFIG_OPTION; |
---|
516 | } |
---|
517 | } |
---|
518 | return -1; |
---|
519 | } |
---|
520 | |
---|
521 | const char *mg_get_option(const struct mg_context *ctx, const char *name) { |
---|
522 | int i; |
---|
523 | if ((i = get_option_index(name)) == -1) { |
---|
524 | return NULL; |
---|
525 | } else if (ctx->config[i] == NULL) { |
---|
526 | return ""; |
---|
527 | } else { |
---|
528 | return ctx->config[i]; |
---|
529 | } |
---|
530 | } |
---|
531 | |
---|
532 | static void sockaddr_to_string(char *buf, size_t len, |
---|
533 | const union usa *usa) { |
---|
534 | buf[0] = '\0'; |
---|
535 | #if defined(USE_IPV6) |
---|
536 | inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ? |
---|
537 | (void *) &usa->sin.sin_addr : |
---|
538 | (void *) &usa->sin6.sin6_addr, buf, len); |
---|
539 | #elif defined(_WIN32) |
---|
540 | // Only Windoze Vista (and newer) have inet_ntop() |
---|
541 | strncpy(buf, inet_ntoa(usa->sin.sin_addr), len); |
---|
542 | #else |
---|
543 | inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); |
---|
544 | #endif |
---|
545 | } |
---|
546 | |
---|
547 | // Print error message to the opened error log stream. |
---|
548 | static void cry(struct mg_connection *conn, const char *fmt, ...) { |
---|
549 | char buf[BUFSIZ], src_addr[20]; |
---|
550 | va_list ap; |
---|
551 | FILE *fp; |
---|
552 | time_t timestamp; |
---|
553 | |
---|
554 | va_start(ap, fmt); |
---|
555 | (void) vsnprintf(buf, sizeof(buf), fmt, ap); |
---|
556 | va_end(ap); |
---|
557 | |
---|
558 | // Do not lock when getting the callback value, here and below. |
---|
559 | // I suppose this is fine, since function cannot disappear in the |
---|
560 | // same way string option can. |
---|
561 | conn->request_info.log_message = buf; |
---|
562 | if (call_user(conn, MG_EVENT_LOG) == NULL) { |
---|
563 | fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL : |
---|
564 | mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+"); |
---|
565 | |
---|
566 | if (fp != NULL) { |
---|
567 | flockfile(fp); |
---|
568 | timestamp = time(NULL); |
---|
569 | |
---|
570 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
571 | fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp, |
---|
572 | src_addr); |
---|
573 | |
---|
574 | if (conn->request_info.request_method != NULL) { |
---|
575 | fprintf(fp, "%s %s: ", conn->request_info.request_method, |
---|
576 | conn->request_info.uri); |
---|
577 | } |
---|
578 | |
---|
579 | (void) fprintf(fp, "%s", buf); |
---|
580 | fputc('\n', fp); |
---|
581 | funlockfile(fp); |
---|
582 | if (fp != stderr) { |
---|
583 | fclose(fp); |
---|
584 | } |
---|
585 | } |
---|
586 | } |
---|
587 | conn->request_info.log_message = NULL; |
---|
588 | } |
---|
589 | |
---|
590 | // Return fake connection structure. Used for logging, if connection |
---|
591 | // is not applicable at the moment of logging. |
---|
592 | static struct mg_connection *fc(struct mg_context *ctx) { |
---|
593 | static struct mg_connection fake_connection; |
---|
594 | fake_connection.ctx = ctx; |
---|
595 | return &fake_connection; |
---|
596 | } |
---|
597 | |
---|
598 | const char *mg_version(void) { |
---|
599 | return MONGOOSE_VERSION; |
---|
600 | } |
---|
601 | |
---|
602 | static void mg_strlcpy(register char *dst, register const char *src, size_t n) { |
---|
603 | for (; *src != '\0' && n > 1; n--) { |
---|
604 | *dst++ = *src++; |
---|
605 | } |
---|
606 | *dst = '\0'; |
---|
607 | } |
---|
608 | |
---|
609 | static int lowercase(const char *s) { |
---|
610 | return tolower(* (const unsigned char *) s); |
---|
611 | } |
---|
612 | |
---|
613 | static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { |
---|
614 | int diff = 0; |
---|
615 | |
---|
616 | if (len > 0) |
---|
617 | do { |
---|
618 | diff = lowercase(s1++) - lowercase(s2++); |
---|
619 | } while (diff == 0 && s1[-1] != '\0' && --len > 0); |
---|
620 | |
---|
621 | return diff; |
---|
622 | } |
---|
623 | |
---|
624 | static int mg_strcasecmp(const char *s1, const char *s2) { |
---|
625 | int diff; |
---|
626 | |
---|
627 | do { |
---|
628 | diff = lowercase(s1++) - lowercase(s2++); |
---|
629 | } while (diff == 0 && s1[-1] != '\0'); |
---|
630 | |
---|
631 | return diff; |
---|
632 | } |
---|
633 | |
---|
634 | static char * mg_strndup(const char *ptr, size_t len) { |
---|
635 | char *p; |
---|
636 | |
---|
637 | if ((p = (char *) malloc(len + 1)) != NULL) { |
---|
638 | mg_strlcpy(p, ptr, len + 1); |
---|
639 | } |
---|
640 | |
---|
641 | return p; |
---|
642 | } |
---|
643 | |
---|
644 | static char * mg_strdup(const char *str) { |
---|
645 | return mg_strndup(str, strlen(str)); |
---|
646 | } |
---|
647 | |
---|
648 | // Like snprintf(), but never returns negative value, or the value |
---|
649 | // that is larger than a supplied buffer. |
---|
650 | // Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability |
---|
651 | // in his audit report. |
---|
652 | static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen, |
---|
653 | const char *fmt, va_list ap) { |
---|
654 | int n; |
---|
655 | |
---|
656 | if (buflen == 0) |
---|
657 | return 0; |
---|
658 | |
---|
659 | n = vsnprintf(buf, buflen, fmt, ap); |
---|
660 | |
---|
661 | if (n < 0) { |
---|
662 | cry(conn, "vsnprintf error"); |
---|
663 | n = 0; |
---|
664 | } else if (n >= (int) buflen) { |
---|
665 | cry(conn, "truncating vsnprintf buffer: [%.*s]", |
---|
666 | n > 200 ? 200 : n, buf); |
---|
667 | n = (int) buflen - 1; |
---|
668 | } |
---|
669 | buf[n] = '\0'; |
---|
670 | |
---|
671 | return n; |
---|
672 | } |
---|
673 | |
---|
674 | static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, |
---|
675 | const char *fmt, ...) { |
---|
676 | va_list ap; |
---|
677 | int n; |
---|
678 | |
---|
679 | va_start(ap, fmt); |
---|
680 | n = mg_vsnprintf(conn, buf, buflen, fmt, ap); |
---|
681 | va_end(ap); |
---|
682 | |
---|
683 | return n; |
---|
684 | } |
---|
685 | |
---|
686 | // Skip the characters until one of the delimiters characters found. |
---|
687 | // 0-terminate resulting word. Skip the delimiter and following whitespaces if any. |
---|
688 | // Advance pointer to buffer to the next word. Return found 0-terminated word. |
---|
689 | // Delimiters can be quoted with quotechar. |
---|
690 | static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) { |
---|
691 | char *p, *begin_word, *end_word, *end_whitespace; |
---|
692 | |
---|
693 | begin_word = *buf; |
---|
694 | end_word = begin_word + strcspn(begin_word, delimiters); |
---|
695 | |
---|
696 | // Check for quotechar |
---|
697 | if (end_word > begin_word) { |
---|
698 | p = end_word - 1; |
---|
699 | while (*p == quotechar) { |
---|
700 | // If there is anything beyond end_word, copy it |
---|
701 | if (*end_word == '\0') { |
---|
702 | *p = '\0'; |
---|
703 | break; |
---|
704 | } else { |
---|
705 | size_t end_off = strcspn(end_word + 1, delimiters); |
---|
706 | memmove (p, end_word, end_off + 1); |
---|
707 | p += end_off; // p must correspond to end_word - 1 |
---|
708 | end_word += end_off + 1; |
---|
709 | } |
---|
710 | } |
---|
711 | for (p++; p < end_word; p++) { |
---|
712 | *p = '\0'; |
---|
713 | } |
---|
714 | } |
---|
715 | |
---|
716 | if (*end_word == '\0') { |
---|
717 | *buf = end_word; |
---|
718 | } else { |
---|
719 | end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace); |
---|
720 | |
---|
721 | for (p = end_word; p < end_whitespace; p++) { |
---|
722 | *p = '\0'; |
---|
723 | } |
---|
724 | |
---|
725 | *buf = end_whitespace; |
---|
726 | } |
---|
727 | |
---|
728 | return begin_word; |
---|
729 | } |
---|
730 | |
---|
731 | // Simplified version of skip_quoted without quote char |
---|
732 | // and whitespace == delimiters |
---|
733 | static char *skip(char **buf, const char *delimiters) { |
---|
734 | return skip_quoted(buf, delimiters, delimiters, 0); |
---|
735 | } |
---|
736 | |
---|
737 | |
---|
738 | // Return HTTP header value, or NULL if not found. |
---|
739 | static const char *get_header(const struct mg_request_info *ri, |
---|
740 | const char *name) { |
---|
741 | int i; |
---|
742 | |
---|
743 | for (i = 0; i < ri->num_headers; i++) |
---|
744 | if (!mg_strcasecmp(name, ri->http_headers[i].name)) |
---|
745 | return ri->http_headers[i].value; |
---|
746 | |
---|
747 | return NULL; |
---|
748 | } |
---|
749 | |
---|
750 | const char *mg_get_header(const struct mg_connection *conn, const char *name) { |
---|
751 | return get_header(&conn->request_info, name); |
---|
752 | } |
---|
753 | |
---|
754 | // A helper function for traversing comma separated list of values. |
---|
755 | // It returns a list pointer shifted to the next value, of NULL if the end |
---|
756 | // of the list found. |
---|
757 | // Value is stored in val vector. If value has form "x=y", then eq_val |
---|
758 | // vector is initialized to point to the "y" part, and val vector length |
---|
759 | // is adjusted to point only to "x". |
---|
760 | static const char *next_option(const char *list, struct vec *val, |
---|
761 | struct vec *eq_val) { |
---|
762 | if (list == NULL || *list == '\0') { |
---|
763 | // End of the list |
---|
764 | list = NULL; |
---|
765 | } else { |
---|
766 | val->ptr = list; |
---|
767 | if ((list = strchr(val->ptr, ',')) != NULL) { |
---|
768 | // Comma found. Store length and shift the list ptr |
---|
769 | val->len = list - val->ptr; |
---|
770 | list++; |
---|
771 | } else { |
---|
772 | // This value is the last one |
---|
773 | list = val->ptr + strlen(val->ptr); |
---|
774 | val->len = list - val->ptr; |
---|
775 | } |
---|
776 | |
---|
777 | if (eq_val != NULL) { |
---|
778 | // Value has form "x=y", adjust pointers and lengths |
---|
779 | // so that val points to "x", and eq_val points to "y". |
---|
780 | eq_val->len = 0; |
---|
781 | eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); |
---|
782 | if (eq_val->ptr != NULL) { |
---|
783 | eq_val->ptr++; // Skip over '=' character |
---|
784 | eq_val->len = val->ptr + val->len - eq_val->ptr; |
---|
785 | val->len = (eq_val->ptr - val->ptr) - 1; |
---|
786 | } |
---|
787 | } |
---|
788 | } |
---|
789 | |
---|
790 | return list; |
---|
791 | } |
---|
792 | |
---|
793 | static int match_prefix(const char *pattern, int pattern_len, const char *str) { |
---|
794 | const char *or_str; |
---|
795 | int i, j, len, res; |
---|
796 | |
---|
797 | if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { |
---|
798 | res = match_prefix(pattern, or_str - pattern, str); |
---|
799 | return res > 0 ? res : |
---|
800 | match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str); |
---|
801 | } |
---|
802 | |
---|
803 | i = j = 0; |
---|
804 | res = -1; |
---|
805 | for (; i < pattern_len; i++, j++) { |
---|
806 | if (pattern[i] == '?' && str[j] != '\0') { |
---|
807 | continue; |
---|
808 | } else if (pattern[i] == '$') { |
---|
809 | return str[j] == '\0' ? j : -1; |
---|
810 | } else if (pattern[i] == '*') { |
---|
811 | i++; |
---|
812 | if (pattern[i] == '*') { |
---|
813 | i++; |
---|
814 | len = strlen(str + j); |
---|
815 | } else { |
---|
816 | len = strcspn(str + j, "/"); |
---|
817 | } |
---|
818 | if (i == pattern_len) { |
---|
819 | return j + len; |
---|
820 | } |
---|
821 | do { |
---|
822 | res = match_prefix(pattern + i, pattern_len - i, str + j + len); |
---|
823 | } while (res == -1 && len-- > 0); |
---|
824 | return res == -1 ? -1 : j + res + len; |
---|
825 | } else if (pattern[i] != str[j]) { |
---|
826 | return -1; |
---|
827 | } |
---|
828 | } |
---|
829 | return j; |
---|
830 | } |
---|
831 | |
---|
832 | // HTTP 1.1 assumes keep alive if "Connection:" header is not set |
---|
833 | // This function must tolerate situations when connection info is not |
---|
834 | // set up, for example if request parsing failed. |
---|
835 | static int should_keep_alive(const struct mg_connection *conn) { |
---|
836 | const char *http_version = conn->request_info.http_version; |
---|
837 | const char *header = mg_get_header(conn, "Connection"); |
---|
838 | if (conn->must_close || |
---|
839 | conn->request_info.status_code == 401 || |
---|
840 | mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 || |
---|
841 | (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) || |
---|
842 | (header == NULL && http_version && strcmp(http_version, "1.1"))) { |
---|
843 | return 0; |
---|
844 | } |
---|
845 | return 1; |
---|
846 | } |
---|
847 | |
---|
848 | static const char *suggest_connection_header(const struct mg_connection *conn) { |
---|
849 | return should_keep_alive(conn) ? "keep-alive" : "close"; |
---|
850 | } |
---|
851 | |
---|
852 | static void send_http_error(struct mg_connection *conn, int status, |
---|
853 | const char *reason, const char *fmt, ...) { |
---|
854 | char buf[BUFSIZ]; |
---|
855 | va_list ap; |
---|
856 | int len; |
---|
857 | |
---|
858 | conn->request_info.status_code = status; |
---|
859 | |
---|
860 | if (call_user(conn, MG_HTTP_ERROR) == NULL) { |
---|
861 | buf[0] = '\0'; |
---|
862 | len = 0; |
---|
863 | |
---|
864 | // Errors 1xx, 204 and 304 MUST NOT send a body |
---|
865 | if (status > 199 && status != 204 && status != 304) { |
---|
866 | len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason); |
---|
867 | cry(conn, "%s", buf); |
---|
868 | buf[len++] = '\n'; |
---|
869 | |
---|
870 | va_start(ap, fmt); |
---|
871 | len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap); |
---|
872 | va_end(ap); |
---|
873 | } |
---|
874 | DEBUG_TRACE(("[%s]", buf)); |
---|
875 | |
---|
876 | mg_printf(conn, "HTTP/1.1 %d %s\r\n" |
---|
877 | "Content-Type: text/plain\r\n" |
---|
878 | "Content-Length: %d\r\n" |
---|
879 | "Connection: %s\r\n\r\n", status, reason, len, |
---|
880 | suggest_connection_header(conn)); |
---|
881 | conn->num_bytes_sent += mg_printf(conn, "%s", buf); |
---|
882 | } |
---|
883 | } |
---|
884 | |
---|
885 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
886 | static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) { |
---|
887 | unused = NULL; |
---|
888 | *mutex = CreateMutex(NULL, FALSE, NULL); |
---|
889 | return *mutex == NULL ? -1 : 0; |
---|
890 | } |
---|
891 | |
---|
892 | static int pthread_mutex_destroy(pthread_mutex_t *mutex) { |
---|
893 | return CloseHandle(*mutex) == 0 ? -1 : 0; |
---|
894 | } |
---|
895 | |
---|
896 | static int pthread_mutex_lock(pthread_mutex_t *mutex) { |
---|
897 | return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; |
---|
898 | } |
---|
899 | |
---|
900 | static int pthread_mutex_unlock(pthread_mutex_t *mutex) { |
---|
901 | return ReleaseMutex(*mutex) == 0 ? -1 : 0; |
---|
902 | } |
---|
903 | |
---|
904 | static int pthread_cond_init(pthread_cond_t *cv, const void *unused) { |
---|
905 | unused = NULL; |
---|
906 | cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL); |
---|
907 | cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL); |
---|
908 | return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1; |
---|
909 | } |
---|
910 | |
---|
911 | static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) { |
---|
912 | HANDLE handles[] = {cv->signal, cv->broadcast}; |
---|
913 | ReleaseMutex(*mutex); |
---|
914 | WaitForMultipleObjects(2, handles, FALSE, INFINITE); |
---|
915 | return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; |
---|
916 | } |
---|
917 | |
---|
918 | static int pthread_cond_signal(pthread_cond_t *cv) { |
---|
919 | return SetEvent(cv->signal) == 0 ? -1 : 0; |
---|
920 | } |
---|
921 | |
---|
922 | static int pthread_cond_broadcast(pthread_cond_t *cv) { |
---|
923 | // Implementation with PulseEvent() has race condition, see |
---|
924 | // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html |
---|
925 | return PulseEvent(cv->broadcast) == 0 ? -1 : 0; |
---|
926 | } |
---|
927 | |
---|
928 | static int pthread_cond_destroy(pthread_cond_t *cv) { |
---|
929 | return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1; |
---|
930 | } |
---|
931 | |
---|
932 | // For Windows, change all slashes to backslashes in path names. |
---|
933 | static void change_slashes_to_backslashes(char *path) { |
---|
934 | int i; |
---|
935 | |
---|
936 | for (i = 0; path[i] != '\0'; i++) { |
---|
937 | if (path[i] == '/') |
---|
938 | path[i] = '\\'; |
---|
939 | // i > 0 check is to preserve UNC paths, like \\server\file.txt |
---|
940 | if (path[i] == '\\' && i > 0) |
---|
941 | while (path[i + 1] == '\\' || path[i + 1] == '/') |
---|
942 | (void) memmove(path + i + 1, |
---|
943 | path + i + 2, strlen(path + i + 1)); |
---|
944 | } |
---|
945 | } |
---|
946 | |
---|
947 | // Encode 'path' which is assumed UTF-8 string, into UNICODE string. |
---|
948 | // wbuf and wbuf_len is a target buffer and its length. |
---|
949 | static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) { |
---|
950 | char buf[PATH_MAX], buf2[PATH_MAX], *p; |
---|
951 | |
---|
952 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
953 | change_slashes_to_backslashes(buf); |
---|
954 | |
---|
955 | // Point p to the end of the file name |
---|
956 | p = buf + strlen(buf) - 1; |
---|
957 | |
---|
958 | // Trim trailing backslash character |
---|
959 | while (p > buf && *p == '\\' && p[-1] != ':') { |
---|
960 | *p-- = '\0'; |
---|
961 | } |
---|
962 | |
---|
963 | // Protect from CGI code disclosure. |
---|
964 | // This is very nasty hole. Windows happily opens files with |
---|
965 | // some garbage in the end of file name. So fopen("a.cgi ", "r") |
---|
966 | // actually opens "a.cgi", and does not return an error! |
---|
967 | if (*p == 0x20 || // No space at the end |
---|
968 | (*p == 0x2e && p > buf) || // No '.' but allow '.' as full path |
---|
969 | *p == 0x2b || // No '+' |
---|
970 | (*p & ~0x7f)) { // And generally no non-ascii chars |
---|
971 | (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf); |
---|
972 | wbuf[0] = L'\0'; |
---|
973 | } else { |
---|
974 | // Convert to Unicode and back. If doubly-converted string does not |
---|
975 | // match the original, something is fishy, reject. |
---|
976 | memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); |
---|
977 | MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); |
---|
978 | WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), |
---|
979 | NULL, NULL); |
---|
980 | if (strcmp(buf, buf2) != 0) { |
---|
981 | wbuf[0] = L'\0'; |
---|
982 | } |
---|
983 | } |
---|
984 | } |
---|
985 | |
---|
986 | #if defined(_WIN32_WCE) |
---|
987 | static time_t time(time_t *ptime) { |
---|
988 | time_t t; |
---|
989 | SYSTEMTIME st; |
---|
990 | FILETIME ft; |
---|
991 | |
---|
992 | GetSystemTime(&st); |
---|
993 | SystemTimeToFileTime(&st, &ft); |
---|
994 | t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime); |
---|
995 | |
---|
996 | if (ptime != NULL) { |
---|
997 | *ptime = t; |
---|
998 | } |
---|
999 | |
---|
1000 | return t; |
---|
1001 | } |
---|
1002 | |
---|
1003 | static struct tm *localtime(const time_t *ptime, struct tm *ptm) { |
---|
1004 | int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF; |
---|
1005 | FILETIME ft, lft; |
---|
1006 | SYSTEMTIME st; |
---|
1007 | TIME_ZONE_INFORMATION tzinfo; |
---|
1008 | |
---|
1009 | if (ptm == NULL) { |
---|
1010 | return NULL; |
---|
1011 | } |
---|
1012 | |
---|
1013 | * (int64_t *) &ft = t; |
---|
1014 | FileTimeToLocalFileTime(&ft, &lft); |
---|
1015 | FileTimeToSystemTime(&lft, &st); |
---|
1016 | ptm->tm_year = st.wYear - 1900; |
---|
1017 | ptm->tm_mon = st.wMonth - 1; |
---|
1018 | ptm->tm_wday = st.wDayOfWeek; |
---|
1019 | ptm->tm_mday = st.wDay; |
---|
1020 | ptm->tm_hour = st.wHour; |
---|
1021 | ptm->tm_min = st.wMinute; |
---|
1022 | ptm->tm_sec = st.wSecond; |
---|
1023 | ptm->tm_yday = 0; // hope nobody uses this |
---|
1024 | ptm->tm_isdst = |
---|
1025 | GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0; |
---|
1026 | |
---|
1027 | return ptm; |
---|
1028 | } |
---|
1029 | |
---|
1030 | static struct tm *gmtime(const time_t *ptime, struct tm *ptm) { |
---|
1031 | // FIXME(lsm): fix this. |
---|
1032 | return localtime(ptime, ptm); |
---|
1033 | } |
---|
1034 | |
---|
1035 | static size_t strftime(char *dst, size_t dst_size, const char *fmt, |
---|
1036 | const struct tm *tm) { |
---|
1037 | (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); |
---|
1038 | return 0; |
---|
1039 | } |
---|
1040 | #endif |
---|
1041 | |
---|
1042 | static int mg_rename(const char* oldname, const char* newname) { |
---|
1043 | wchar_t woldbuf[PATH_MAX]; |
---|
1044 | wchar_t wnewbuf[PATH_MAX]; |
---|
1045 | |
---|
1046 | to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf)); |
---|
1047 | to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf)); |
---|
1048 | |
---|
1049 | return MoveFileW(woldbuf, wnewbuf) ? 0 : -1; |
---|
1050 | } |
---|
1051 | |
---|
1052 | |
---|
1053 | static FILE *mg_fopen(const char *path, const char *mode) { |
---|
1054 | wchar_t wbuf[PATH_MAX], wmode[20]; |
---|
1055 | |
---|
1056 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1057 | MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); |
---|
1058 | |
---|
1059 | return _wfopen(wbuf, wmode); |
---|
1060 | } |
---|
1061 | |
---|
1062 | static int mg_stat(const char *path, struct mgstat *stp) { |
---|
1063 | int ok = -1; // Error |
---|
1064 | wchar_t wbuf[PATH_MAX]; |
---|
1065 | WIN32_FILE_ATTRIBUTE_DATA info; |
---|
1066 | |
---|
1067 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1068 | |
---|
1069 | if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { |
---|
1070 | stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); |
---|
1071 | stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime, |
---|
1072 | info.ftLastWriteTime.dwHighDateTime); |
---|
1073 | stp->is_directory = |
---|
1074 | info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; |
---|
1075 | ok = 0; // Success |
---|
1076 | } |
---|
1077 | |
---|
1078 | return ok; |
---|
1079 | } |
---|
1080 | |
---|
1081 | static int mg_remove(const char *path) { |
---|
1082 | wchar_t wbuf[PATH_MAX]; |
---|
1083 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1084 | return DeleteFileW(wbuf) ? 0 : -1; |
---|
1085 | } |
---|
1086 | |
---|
1087 | static int mg_mkdir(const char *path, int mode) { |
---|
1088 | char buf[PATH_MAX]; |
---|
1089 | wchar_t wbuf[PATH_MAX]; |
---|
1090 | |
---|
1091 | mode = 0; // Unused |
---|
1092 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
1093 | change_slashes_to_backslashes(buf); |
---|
1094 | |
---|
1095 | (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf)); |
---|
1096 | |
---|
1097 | return CreateDirectoryW(wbuf, NULL) ? 0 : -1; |
---|
1098 | } |
---|
1099 | |
---|
1100 | // Implementation of POSIX opendir/closedir/readdir for Windows. |
---|
1101 | static DIR * opendir(const char *name) { |
---|
1102 | DIR *dir = NULL; |
---|
1103 | wchar_t wpath[PATH_MAX]; |
---|
1104 | DWORD attrs; |
---|
1105 | |
---|
1106 | if (name == NULL) { |
---|
1107 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1108 | } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { |
---|
1109 | SetLastError(ERROR_NOT_ENOUGH_MEMORY); |
---|
1110 | } else { |
---|
1111 | to_unicode(name, wpath, ARRAY_SIZE(wpath)); |
---|
1112 | attrs = GetFileAttributesW(wpath); |
---|
1113 | if (attrs != 0xFFFFFFFF && |
---|
1114 | ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { |
---|
1115 | (void) wcscat(wpath, L"\\*"); |
---|
1116 | dir->handle = FindFirstFileW(wpath, &dir->info); |
---|
1117 | dir->result.d_name[0] = '\0'; |
---|
1118 | } else { |
---|
1119 | free(dir); |
---|
1120 | dir = NULL; |
---|
1121 | } |
---|
1122 | } |
---|
1123 | |
---|
1124 | return dir; |
---|
1125 | } |
---|
1126 | |
---|
1127 | static int closedir(DIR *dir) { |
---|
1128 | int result = 0; |
---|
1129 | |
---|
1130 | if (dir != NULL) { |
---|
1131 | if (dir->handle != INVALID_HANDLE_VALUE) |
---|
1132 | result = FindClose(dir->handle) ? 0 : -1; |
---|
1133 | |
---|
1134 | free(dir); |
---|
1135 | } else { |
---|
1136 | result = -1; |
---|
1137 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1138 | } |
---|
1139 | |
---|
1140 | return result; |
---|
1141 | } |
---|
1142 | |
---|
1143 | static struct dirent *readdir(DIR *dir) { |
---|
1144 | struct dirent *result = 0; |
---|
1145 | |
---|
1146 | if (dir) { |
---|
1147 | if (dir->handle != INVALID_HANDLE_VALUE) { |
---|
1148 | result = &dir->result; |
---|
1149 | (void) WideCharToMultiByte(CP_UTF8, 0, |
---|
1150 | dir->info.cFileName, -1, result->d_name, |
---|
1151 | sizeof(result->d_name), NULL, NULL); |
---|
1152 | |
---|
1153 | if (!FindNextFileW(dir->handle, &dir->info)) { |
---|
1154 | (void) FindClose(dir->handle); |
---|
1155 | dir->handle = INVALID_HANDLE_VALUE; |
---|
1156 | } |
---|
1157 | |
---|
1158 | } else { |
---|
1159 | SetLastError(ERROR_FILE_NOT_FOUND); |
---|
1160 | } |
---|
1161 | } else { |
---|
1162 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1163 | } |
---|
1164 | |
---|
1165 | return result; |
---|
1166 | } |
---|
1167 | |
---|
1168 | #define set_close_on_exec(fd) // No FD_CLOEXEC on Windows |
---|
1169 | |
---|
1170 | static int start_thread(struct mg_context *ctx, mg_thread_func_t f, void *p) { |
---|
1171 | return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0; |
---|
1172 | } |
---|
1173 | |
---|
1174 | static HANDLE dlopen(const char *dll_name, int flags) { |
---|
1175 | wchar_t wbuf[PATH_MAX]; |
---|
1176 | flags = 0; // Unused |
---|
1177 | to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); |
---|
1178 | return LoadLibraryW(wbuf); |
---|
1179 | } |
---|
1180 | |
---|
1181 | #if !defined(NO_CGI) |
---|
1182 | #define SIGKILL 0 |
---|
1183 | static int kill(pid_t pid, int sig_num) { |
---|
1184 | (void) TerminateProcess(pid, sig_num); |
---|
1185 | (void) CloseHandle(pid); |
---|
1186 | return 0; |
---|
1187 | } |
---|
1188 | |
---|
1189 | static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
---|
1190 | char *envblk, char *envp[], int fd_stdin, |
---|
1191 | int fd_stdout, const char *dir) { |
---|
1192 | HANDLE me; |
---|
1193 | char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX]; |
---|
1194 | FILE *fp; |
---|
1195 | STARTUPINFOA si = { sizeof(si) }; |
---|
1196 | PROCESS_INFORMATION pi = { 0 }; |
---|
1197 | |
---|
1198 | envp = NULL; // Unused |
---|
1199 | |
---|
1200 | // TODO(lsm): redirect CGI errors to the error log file |
---|
1201 | si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
---|
1202 | si.wShowWindow = SW_HIDE; |
---|
1203 | |
---|
1204 | me = GetCurrentProcess(); |
---|
1205 | (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me, |
---|
1206 | &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
1207 | (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me, |
---|
1208 | &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
1209 | |
---|
1210 | // If CGI file is a script, try to read the interpreter line |
---|
1211 | interp = conn->ctx->config[CGI_INTERPRETER]; |
---|
1212 | if (interp == NULL) { |
---|
1213 | buf[2] = '\0'; |
---|
1214 | mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog); |
---|
1215 | if ((fp = fopen(cmdline, "r")) != NULL) { |
---|
1216 | (void) fgets(buf, sizeof(buf), fp); |
---|
1217 | if (buf[0] != '#' || buf[1] != '!') { |
---|
1218 | // First line does not start with "#!". Do not set interpreter. |
---|
1219 | buf[2] = '\0'; |
---|
1220 | } else { |
---|
1221 | // Trim whitespaces in interpreter name |
---|
1222 | for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) { |
---|
1223 | *p = '\0'; |
---|
1224 | } |
---|
1225 | } |
---|
1226 | (void) fclose(fp); |
---|
1227 | } |
---|
1228 | interp = buf + 2; |
---|
1229 | } |
---|
1230 | |
---|
1231 | (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s", |
---|
1232 | interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog); |
---|
1233 | |
---|
1234 | DEBUG_TRACE(("Running [%s]", cmdline)); |
---|
1235 | if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, |
---|
1236 | CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) { |
---|
1237 | cry(conn, "%s: CreateProcess(%s): %d", |
---|
1238 | __func__, cmdline, ERRNO); |
---|
1239 | pi.hProcess = (pid_t) -1; |
---|
1240 | } else { |
---|
1241 | (void) close(fd_stdin); |
---|
1242 | (void) close(fd_stdout); |
---|
1243 | } |
---|
1244 | |
---|
1245 | (void) CloseHandle(si.hStdOutput); |
---|
1246 | (void) CloseHandle(si.hStdInput); |
---|
1247 | (void) CloseHandle(pi.hThread); |
---|
1248 | |
---|
1249 | return (pid_t) pi.hProcess; |
---|
1250 | } |
---|
1251 | #endif // !NO_CGI |
---|
1252 | |
---|
1253 | static int set_non_blocking_mode(SOCKET sock) { |
---|
1254 | unsigned long on = 1; |
---|
1255 | return ioctlsocket(sock, FIONBIO, &on); |
---|
1256 | } |
---|
1257 | |
---|
1258 | #else |
---|
1259 | static int mg_stat(const char *path, struct mgstat *stp) { |
---|
1260 | struct stat st; |
---|
1261 | int ok; |
---|
1262 | |
---|
1263 | if (stat(path, &st) == 0) { |
---|
1264 | ok = 0; |
---|
1265 | stp->size = st.st_size; |
---|
1266 | stp->mtime = st.st_mtime; |
---|
1267 | stp->is_directory = S_ISDIR(st.st_mode); |
---|
1268 | } else { |
---|
1269 | ok = -1; |
---|
1270 | } |
---|
1271 | |
---|
1272 | return ok; |
---|
1273 | } |
---|
1274 | |
---|
1275 | static void set_close_on_exec(int fd) { |
---|
1276 | (void) fcntl(fd, F_SETFD, FD_CLOEXEC); |
---|
1277 | } |
---|
1278 | |
---|
1279 | static int start_thread(struct mg_context *ctx, mg_thread_func_t func, |
---|
1280 | void *param) { |
---|
1281 | pthread_t thread_id; |
---|
1282 | pthread_attr_t attr; |
---|
1283 | int retval; |
---|
1284 | char* stacksize = ctx->config[THREAD_STACK_SIZE]; |
---|
1285 | char* priority = ctx->config[THREAD_PRIORITY]; |
---|
1286 | char* policy = ctx->config[THREAD_POLICY]; |
---|
1287 | int noinheritsched = 0; |
---|
1288 | |
---|
1289 | (void) pthread_attr_init(&attr); |
---|
1290 | (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
---|
1291 | // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled |
---|
1292 | // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5); |
---|
1293 | |
---|
1294 | if (stacksize != NULL) { |
---|
1295 | size_t size = atoi(stacksize); |
---|
1296 | (void) pthread_attr_setstacksize(&attr, size); |
---|
1297 | } |
---|
1298 | |
---|
1299 | if (priority != NULL) { |
---|
1300 | struct sched_param sched_param; |
---|
1301 | memset(&sched_param, 0, sizeof(sched_param)); |
---|
1302 | sched_param.sched_priority = atoi(priority); |
---|
1303 | (void) pthread_attr_setschedparam(&attr, &sched_param); |
---|
1304 | noinheritsched = 1; |
---|
1305 | } |
---|
1306 | |
---|
1307 | if (policy != NULL) { |
---|
1308 | int p_policy; |
---|
1309 | (void) pthread_attr_getschedpolicy(&attr, &p_policy); |
---|
1310 | |
---|
1311 | switch (policy[0]) { |
---|
1312 | case 'o': |
---|
1313 | p_policy = SCHED_OTHER; |
---|
1314 | break; |
---|
1315 | case 'f': |
---|
1316 | p_policy = SCHED_FIFO; |
---|
1317 | break; |
---|
1318 | case 'r': |
---|
1319 | p_policy = SCHED_RR; |
---|
1320 | break; |
---|
1321 | #if defined(_POSIX_SPORADIC_SERVER) || defined(_POSIX_THREAD_SPORADIC_SERVER) |
---|
1322 | case 's': |
---|
1323 | p_policy = SCHED_SPORADIC; |
---|
1324 | break; |
---|
1325 | #endif |
---|
1326 | default: |
---|
1327 | cry(fc(ctx), "%s: Unknown scheduler: %s", __func__, policy); |
---|
1328 | break; |
---|
1329 | } |
---|
1330 | |
---|
1331 | (void) pthread_attr_setschedpolicy(&attr, p_policy); |
---|
1332 | |
---|
1333 | noinheritsched = 1; |
---|
1334 | } |
---|
1335 | |
---|
1336 | if (noinheritsched != 0) { |
---|
1337 | (void) pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED); |
---|
1338 | } |
---|
1339 | |
---|
1340 | if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) { |
---|
1341 | cry(fc(ctx), "%s: %s", __func__, strerror(retval)); |
---|
1342 | } |
---|
1343 | |
---|
1344 | return retval; |
---|
1345 | } |
---|
1346 | |
---|
1347 | #ifndef NO_CGI |
---|
1348 | static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
---|
1349 | char *envblk, char *envp[], int fd_stdin, |
---|
1350 | int fd_stdout, const char *dir) { |
---|
1351 | pid_t pid; |
---|
1352 | const char *interp; |
---|
1353 | |
---|
1354 | envblk = NULL; // Unused |
---|
1355 | |
---|
1356 | if ((pid = fork()) == -1) { |
---|
1357 | // Parent |
---|
1358 | send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO)); |
---|
1359 | } else if (pid == 0) { |
---|
1360 | // Child |
---|
1361 | if (chdir(dir) != 0) { |
---|
1362 | cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO)); |
---|
1363 | } else if (dup2(fd_stdin, 0) == -1) { |
---|
1364 | cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO)); |
---|
1365 | } else if (dup2(fd_stdout, 1) == -1) { |
---|
1366 | cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO)); |
---|
1367 | } else { |
---|
1368 | (void) dup2(fd_stdout, 2); |
---|
1369 | (void) close(fd_stdin); |
---|
1370 | (void) close(fd_stdout); |
---|
1371 | |
---|
1372 | // Execute CGI program. No need to lock: new process |
---|
1373 | interp = conn->ctx->config[CGI_INTERPRETER]; |
---|
1374 | if (interp == NULL) { |
---|
1375 | (void) execle(prog, prog, NULL, envp); |
---|
1376 | cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO)); |
---|
1377 | } else { |
---|
1378 | (void) execle(interp, interp, prog, NULL, envp); |
---|
1379 | cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog, |
---|
1380 | strerror(ERRNO)); |
---|
1381 | } |
---|
1382 | } |
---|
1383 | exit(EXIT_FAILURE); |
---|
1384 | } else { |
---|
1385 | // Parent. Close stdio descriptors |
---|
1386 | (void) close(fd_stdin); |
---|
1387 | (void) close(fd_stdout); |
---|
1388 | } |
---|
1389 | |
---|
1390 | return pid; |
---|
1391 | } |
---|
1392 | #endif // !NO_CGI |
---|
1393 | |
---|
1394 | static int set_non_blocking_mode(SOCKET sock) { |
---|
1395 | int flags; |
---|
1396 | |
---|
1397 | flags = fcntl(sock, F_GETFL, 0); |
---|
1398 | (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK); |
---|
1399 | |
---|
1400 | return 0; |
---|
1401 | } |
---|
1402 | #endif // _WIN32 |
---|
1403 | |
---|
1404 | // Write data to the IO channel - opened file descriptor, socket or SSL |
---|
1405 | // descriptor. Return number of bytes written. |
---|
1406 | static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, |
---|
1407 | int64_t len) { |
---|
1408 | int64_t sent; |
---|
1409 | int n, k; |
---|
1410 | |
---|
1411 | sent = 0; |
---|
1412 | while (sent < len) { |
---|
1413 | |
---|
1414 | // How many bytes we send in this iteration |
---|
1415 | k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); |
---|
1416 | |
---|
1417 | if (ssl != NULL) { |
---|
1418 | n = SSL_write(ssl, buf + sent, k); |
---|
1419 | } else if (fp != NULL) { |
---|
1420 | n = fwrite(buf + sent, 1, (size_t) k, fp); |
---|
1421 | if (ferror(fp)) |
---|
1422 | n = -1; |
---|
1423 | } else { |
---|
1424 | n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL); |
---|
1425 | } |
---|
1426 | |
---|
1427 | if (n < 0) |
---|
1428 | break; |
---|
1429 | |
---|
1430 | sent += n; |
---|
1431 | } |
---|
1432 | |
---|
1433 | return sent; |
---|
1434 | } |
---|
1435 | |
---|
1436 | // Read from IO channel - opened file descriptor, socket, or SSL descriptor. |
---|
1437 | // Return number of bytes read. |
---|
1438 | static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) { |
---|
1439 | int nread; |
---|
1440 | |
---|
1441 | if (ssl != NULL) { |
---|
1442 | nread = SSL_read(ssl, buf, len); |
---|
1443 | } else if (fp != NULL) { |
---|
1444 | // Use read() instead of fread(), because if we're reading from the CGI |
---|
1445 | // pipe, fread() may block until IO buffer is filled up. We cannot afford |
---|
1446 | // to block and must pass all read bytes immediately to the client. |
---|
1447 | nread = read(fileno(fp), buf, (size_t) len); |
---|
1448 | if (ferror(fp)) |
---|
1449 | nread = -1; |
---|
1450 | } else { |
---|
1451 | nread = recv(sock, buf, (size_t) len, 0); |
---|
1452 | } |
---|
1453 | |
---|
1454 | return nread; |
---|
1455 | } |
---|
1456 | |
---|
1457 | int mg_read(struct mg_connection *conn, void *buf, size_t len) { |
---|
1458 | int n, buffered_len, nread; |
---|
1459 | const char *buffered; |
---|
1460 | |
---|
1461 | assert((conn->content_len == -1 && conn->consumed_content == 0) || |
---|
1462 | conn->consumed_content <= conn->content_len); |
---|
1463 | DEBUG_TRACE(("%p %zu %lld %lld", buf, len, |
---|
1464 | conn->content_len, conn->consumed_content)); |
---|
1465 | nread = 0; |
---|
1466 | if (conn->consumed_content < conn->content_len) { |
---|
1467 | |
---|
1468 | // Adjust number of bytes to read. |
---|
1469 | int64_t to_read = conn->content_len - conn->consumed_content; |
---|
1470 | if (to_read < (int64_t) len) { |
---|
1471 | len = (int) to_read; |
---|
1472 | } |
---|
1473 | |
---|
1474 | // How many bytes of data we have buffered in the request buffer? |
---|
1475 | buffered = conn->buf + conn->request_len + conn->consumed_content; |
---|
1476 | buffered_len = conn->data_len - conn->request_len; |
---|
1477 | assert(buffered_len >= 0); |
---|
1478 | |
---|
1479 | // Return buffered data back if we haven't done that yet. |
---|
1480 | if (conn->consumed_content < (int64_t) buffered_len) { |
---|
1481 | buffered_len -= (int) conn->consumed_content; |
---|
1482 | if (len < (size_t) buffered_len) { |
---|
1483 | buffered_len = len; |
---|
1484 | } |
---|
1485 | memcpy(buf, buffered, (size_t)buffered_len); |
---|
1486 | len -= buffered_len; |
---|
1487 | buf = (char *) buf + buffered_len; |
---|
1488 | conn->consumed_content += buffered_len; |
---|
1489 | nread = buffered_len; |
---|
1490 | } |
---|
1491 | |
---|
1492 | // We have returned all buffered data. Read new data from the remote socket. |
---|
1493 | while (len > 0) { |
---|
1494 | n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len); |
---|
1495 | if (n <= 0) { |
---|
1496 | break; |
---|
1497 | } |
---|
1498 | buf = (char *) buf + n; |
---|
1499 | conn->consumed_content += n; |
---|
1500 | nread += n; |
---|
1501 | len -= n; |
---|
1502 | } |
---|
1503 | } |
---|
1504 | return nread; |
---|
1505 | } |
---|
1506 | |
---|
1507 | int mg_write(struct mg_connection *conn, const void *buf, size_t len) { |
---|
1508 | return (int) push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
---|
1509 | (int64_t) len); |
---|
1510 | } |
---|
1511 | |
---|
1512 | int mg_printf(struct mg_connection *conn, const char *fmt, ...) { |
---|
1513 | char buf[BUFSIZ]; |
---|
1514 | int len; |
---|
1515 | va_list ap; |
---|
1516 | |
---|
1517 | va_start(ap, fmt); |
---|
1518 | len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap); |
---|
1519 | va_end(ap); |
---|
1520 | |
---|
1521 | return mg_write(conn, buf, (size_t)len); |
---|
1522 | } |
---|
1523 | |
---|
1524 | // URL-decode input buffer into destination buffer. |
---|
1525 | // 0-terminate the destination buffer. Return the length of decoded data. |
---|
1526 | // form-url-encoded data differs from URI encoding in a way that it |
---|
1527 | // uses '+' as character for space, see RFC 1866 section 8.2.1 |
---|
1528 | // http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt |
---|
1529 | static size_t url_decode(const char *src, size_t src_len, char *dst, |
---|
1530 | size_t dst_len, int is_form_url_encoded) { |
---|
1531 | size_t i, j; |
---|
1532 | int a, b; |
---|
1533 | #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') |
---|
1534 | |
---|
1535 | for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { |
---|
1536 | if (src[i] == '%' && |
---|
1537 | isxdigit(* (const unsigned char *) (src + i + 1)) && |
---|
1538 | isxdigit(* (const unsigned char *) (src + i + 2))) { |
---|
1539 | a = tolower(* (const unsigned char *) (src + i + 1)); |
---|
1540 | b = tolower(* (const unsigned char *) (src + i + 2)); |
---|
1541 | dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); |
---|
1542 | i += 2; |
---|
1543 | } else if (is_form_url_encoded && src[i] == '+') { |
---|
1544 | dst[j] = ' '; |
---|
1545 | } else { |
---|
1546 | dst[j] = src[i]; |
---|
1547 | } |
---|
1548 | } |
---|
1549 | |
---|
1550 | dst[j] = '\0'; // Null-terminate the destination |
---|
1551 | |
---|
1552 | return j; |
---|
1553 | } |
---|
1554 | |
---|
1555 | // Scan given buffer and fetch the value of the given variable. |
---|
1556 | // It can be specified in query string, or in the POST data. |
---|
1557 | // Return NULL if the variable not found, or allocated 0-terminated value. |
---|
1558 | // It is caller's responsibility to free the returned value. |
---|
1559 | int mg_get_var(const char *buf, size_t buf_len, const char *name, |
---|
1560 | char *dst, size_t dst_len) { |
---|
1561 | const char *p, *e, *s; |
---|
1562 | size_t name_len, len; |
---|
1563 | |
---|
1564 | name_len = strlen(name); |
---|
1565 | e = buf + buf_len; |
---|
1566 | len = -1; |
---|
1567 | dst[0] = '\0'; |
---|
1568 | |
---|
1569 | // buf is "var1=val1&var2=val2...". Find variable first |
---|
1570 | for (p = buf; p != NULL && p + name_len < e; p++) { |
---|
1571 | if ((p == buf || p[-1] == '&') && p[name_len] == '=' && |
---|
1572 | !mg_strncasecmp(name, p, name_len)) { |
---|
1573 | |
---|
1574 | // Point p to variable value |
---|
1575 | p += name_len + 1; |
---|
1576 | |
---|
1577 | // Point s to the end of the value |
---|
1578 | s = (const char *) memchr(p, '&', (size_t)(e - p)); |
---|
1579 | if (s == NULL) { |
---|
1580 | s = e; |
---|
1581 | } |
---|
1582 | assert(s >= p); |
---|
1583 | |
---|
1584 | // Decode variable into destination buffer |
---|
1585 | if ((size_t) (s - p) < dst_len) { |
---|
1586 | len = url_decode(p, (size_t)(s - p), dst, dst_len, 1); |
---|
1587 | } |
---|
1588 | break; |
---|
1589 | } |
---|
1590 | } |
---|
1591 | |
---|
1592 | return len; |
---|
1593 | } |
---|
1594 | |
---|
1595 | int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name, |
---|
1596 | char *dst, size_t dst_size) { |
---|
1597 | const char *s, *p, *end; |
---|
1598 | int name_len, len = -1; |
---|
1599 | |
---|
1600 | dst[0] = '\0'; |
---|
1601 | if ((s = mg_get_header(conn, "Cookie")) == NULL) { |
---|
1602 | return 0; |
---|
1603 | } |
---|
1604 | |
---|
1605 | name_len = strlen(cookie_name); |
---|
1606 | end = s + strlen(s); |
---|
1607 | |
---|
1608 | for (; (s = strstr(s, cookie_name)) != NULL; s += name_len) |
---|
1609 | if (s[name_len] == '=') { |
---|
1610 | s += name_len + 1; |
---|
1611 | if ((p = strchr(s, ' ')) == NULL) |
---|
1612 | p = end; |
---|
1613 | if (p[-1] == ';') |
---|
1614 | p--; |
---|
1615 | if (*s == '"' && p[-1] == '"' && p > s + 1) { |
---|
1616 | s++; |
---|
1617 | p--; |
---|
1618 | } |
---|
1619 | if ((size_t) (p - s) < dst_size) { |
---|
1620 | len = (p - s) + 1; |
---|
1621 | mg_strlcpy(dst, s, (size_t)len); |
---|
1622 | } |
---|
1623 | break; |
---|
1624 | } |
---|
1625 | |
---|
1626 | return len; |
---|
1627 | } |
---|
1628 | |
---|
1629 | static int convert_uri_to_file_name(struct mg_connection *conn, char *buf, |
---|
1630 | size_t buf_len, struct mgstat *st) { |
---|
1631 | struct vec a, b; |
---|
1632 | const char *rewrite, *uri = conn->request_info.uri; |
---|
1633 | char *p; |
---|
1634 | int match_len, stat_result; |
---|
1635 | |
---|
1636 | buf_len--; // This is because memmove() for PATH_INFO may shift part |
---|
1637 | // of the path one byte on the right. |
---|
1638 | mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT], |
---|
1639 | uri); |
---|
1640 | |
---|
1641 | rewrite = conn->ctx->config[REWRITE]; |
---|
1642 | while ((rewrite = next_option(rewrite, &a, &b)) != NULL) { |
---|
1643 | if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) { |
---|
1644 | mg_snprintf(conn, buf, buf_len, "%.*s%s", b.len, b.ptr, uri + match_len); |
---|
1645 | break; |
---|
1646 | } |
---|
1647 | } |
---|
1648 | |
---|
1649 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
1650 | //change_slashes_to_backslashes(buf); |
---|
1651 | #endif // _WIN32 |
---|
1652 | |
---|
1653 | if ((stat_result = mg_stat(buf, st)) != 0) { |
---|
1654 | // Support PATH_INFO for CGI scripts. |
---|
1655 | for (p = buf + strlen(buf); p > buf + 1; p--) { |
---|
1656 | if (*p == '/') { |
---|
1657 | *p = '\0'; |
---|
1658 | if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
---|
1659 | strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 && |
---|
1660 | (stat_result = mg_stat(buf, st)) == 0) { |
---|
1661 | // Shift PATH_INFO block one character right, e.g. |
---|
1662 | // "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00" |
---|
1663 | // conn->path_info is pointing to the local variable "path" declared |
---|
1664 | // in handle_request(), so PATH_INFO not valid after |
---|
1665 | // handle_request returns. |
---|
1666 | conn->path_info = p + 1; |
---|
1667 | memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0 |
---|
1668 | p[1] = '/'; |
---|
1669 | break; |
---|
1670 | } else { |
---|
1671 | *p = '/'; |
---|
1672 | stat_result = -1; |
---|
1673 | } |
---|
1674 | } |
---|
1675 | } |
---|
1676 | } |
---|
1677 | |
---|
1678 | return stat_result; |
---|
1679 | } |
---|
1680 | |
---|
1681 | static int sslize(struct mg_connection *conn, int (*func)(SSL *)) { |
---|
1682 | return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL && |
---|
1683 | SSL_set_fd(conn->ssl, conn->client.sock) == 1 && |
---|
1684 | func(conn->ssl) == 1; |
---|
1685 | } |
---|
1686 | |
---|
1687 | // Check whether full request is buffered. Return: |
---|
1688 | // -1 if request is malformed |
---|
1689 | // 0 if request is not yet fully buffered |
---|
1690 | // >0 actual request length, including last \r\n\r\n |
---|
1691 | static int get_request_len(const char *buf, int buflen) { |
---|
1692 | const char *s, *e; |
---|
1693 | int len = 0; |
---|
1694 | |
---|
1695 | DEBUG_TRACE(("buf: %p, len: %d", buf, buflen)); |
---|
1696 | for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) |
---|
1697 | // Control characters are not allowed but >=128 is. |
---|
1698 | if (!isprint(* (const unsigned char *) s) && *s != '\r' && |
---|
1699 | *s != '\n' && * (const unsigned char *) s < 128) { |
---|
1700 | len = -1; |
---|
1701 | } else if (s[0] == '\n' && s[1] == '\n') { |
---|
1702 | len = (int) (s - buf) + 2; |
---|
1703 | } else if (s[0] == '\n' && &s[1] < e && |
---|
1704 | s[1] == '\r' && s[2] == '\n') { |
---|
1705 | len = (int) (s - buf) + 3; |
---|
1706 | } |
---|
1707 | |
---|
1708 | return len; |
---|
1709 | } |
---|
1710 | |
---|
1711 | // Convert month to the month number. Return -1 on error, or month number |
---|
1712 | static int get_month_index(const char *s) { |
---|
1713 | size_t i; |
---|
1714 | |
---|
1715 | for (i = 0; i < ARRAY_SIZE(month_names); i++) |
---|
1716 | if (!strcmp(s, month_names[i])) |
---|
1717 | return (int) i; |
---|
1718 | |
---|
1719 | return -1; |
---|
1720 | } |
---|
1721 | |
---|
1722 | // Parse UTC date-time string, and return the corresponding time_t value. |
---|
1723 | static time_t parse_date_string(const char *datetime) { |
---|
1724 | static const unsigned short days_before_month[] = { |
---|
1725 | 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 |
---|
1726 | }; |
---|
1727 | char month_str[32]; |
---|
1728 | int second, minute, hour, day, month, year, leap_days, days; |
---|
1729 | time_t result = (time_t) 0; |
---|
1730 | |
---|
1731 | if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", |
---|
1732 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
1733 | (sscanf(datetime, "%d %3s %d %d:%d:%d", |
---|
1734 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
1735 | (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", |
---|
1736 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
1737 | (sscanf(datetime, "%d-%3s-%d %d:%d:%d", |
---|
1738 | &day, month_str, &year, &hour, &minute, &second) == 6)) && |
---|
1739 | year > 1970 && |
---|
1740 | (month = get_month_index(month_str)) != -1) { |
---|
1741 | year -= 1970; |
---|
1742 | leap_days = year / 4 - year / 100 + year / 400; |
---|
1743 | days = year * 365 + days_before_month[month] + (day - 1) + leap_days; |
---|
1744 | result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; |
---|
1745 | } |
---|
1746 | |
---|
1747 | return result; |
---|
1748 | } |
---|
1749 | |
---|
1750 | // Protect against directory disclosure attack by removing '..', |
---|
1751 | // excessive '/' and '\' characters |
---|
1752 | static void remove_double_dots_and_double_slashes(char *s) { |
---|
1753 | char *p = s; |
---|
1754 | |
---|
1755 | while (*s != '\0') { |
---|
1756 | *p++ = *s++; |
---|
1757 | if (IS_DIRSEP_CHAR(s[-1])) { |
---|
1758 | // Skip all following slashes and backslashes |
---|
1759 | while (IS_DIRSEP_CHAR(s[0])) { |
---|
1760 | s++; |
---|
1761 | } |
---|
1762 | |
---|
1763 | // Skip all double-dots |
---|
1764 | while (*s == '.' && s[1] == '.') { |
---|
1765 | s += 2; |
---|
1766 | } |
---|
1767 | } |
---|
1768 | } |
---|
1769 | *p = '\0'; |
---|
1770 | } |
---|
1771 | |
---|
1772 | static const struct { |
---|
1773 | const char *extension; |
---|
1774 | size_t ext_len; |
---|
1775 | const char *mime_type; |
---|
1776 | size_t mime_type_len; |
---|
1777 | } builtin_mime_types[] = { |
---|
1778 | {".html", 5, "text/html", 9}, |
---|
1779 | {".htm", 4, "text/html", 9}, |
---|
1780 | {".shtm", 5, "text/html", 9}, |
---|
1781 | {".shtml", 6, "text/html", 9}, |
---|
1782 | {".css", 4, "text/css", 8}, |
---|
1783 | {".js", 3, "application/x-javascript", 24}, |
---|
1784 | {".ico", 4, "image/x-icon", 12}, |
---|
1785 | {".gif", 4, "image/gif", 9}, |
---|
1786 | {".jpg", 4, "image/jpeg", 10}, |
---|
1787 | {".jpeg", 5, "image/jpeg", 10}, |
---|
1788 | {".png", 4, "image/png", 9}, |
---|
1789 | {".svg", 4, "image/svg+xml", 13}, |
---|
1790 | {".torrent", 8, "application/x-bittorrent", 24}, |
---|
1791 | {".wav", 4, "audio/x-wav", 11}, |
---|
1792 | {".mp3", 4, "audio/x-mp3", 11}, |
---|
1793 | {".mid", 4, "audio/mid", 9}, |
---|
1794 | {".m3u", 4, "audio/x-mpegurl", 15}, |
---|
1795 | {".ram", 4, "audio/x-pn-realaudio", 20}, |
---|
1796 | {".xml", 4, "text/xml", 8}, |
---|
1797 | {".xslt", 5, "application/xml", 15}, |
---|
1798 | {".ra", 3, "audio/x-pn-realaudio", 20}, |
---|
1799 | {".doc", 4, "application/msword", 19}, |
---|
1800 | {".exe", 4, "application/octet-stream", 24}, |
---|
1801 | {".zip", 4, "application/x-zip-compressed", 28}, |
---|
1802 | {".xls", 4, "application/excel", 17}, |
---|
1803 | {".tgz", 4, "application/x-tar-gz", 20}, |
---|
1804 | {".tar", 4, "application/x-tar", 17}, |
---|
1805 | {".gz", 3, "application/x-gunzip", 20}, |
---|
1806 | {".arj", 4, "application/x-arj-compressed", 28}, |
---|
1807 | {".rar", 4, "application/x-arj-compressed", 28}, |
---|
1808 | {".rtf", 4, "application/rtf", 15}, |
---|
1809 | {".pdf", 4, "application/pdf", 15}, |
---|
1810 | {".swf", 4, "application/x-shockwave-flash",29}, |
---|
1811 | {".mpg", 4, "video/mpeg", 10}, |
---|
1812 | {".mpeg", 5, "video/mpeg", 10}, |
---|
1813 | {".mp4", 4, "video/mp4", 9}, |
---|
1814 | {".m4v", 4, "video/x-m4v", 11}, |
---|
1815 | {".asf", 4, "video/x-ms-asf", 14}, |
---|
1816 | {".avi", 4, "video/x-msvideo", 15}, |
---|
1817 | {".bmp", 4, "image/bmp", 9}, |
---|
1818 | {NULL, 0, NULL, 0} |
---|
1819 | }; |
---|
1820 | |
---|
1821 | // Look at the "path" extension and figure what mime type it has. |
---|
1822 | // Store mime type in the vector. |
---|
1823 | static void get_mime_type(struct mg_context *ctx, const char *path, |
---|
1824 | struct vec *vec) { |
---|
1825 | struct vec ext_vec, mime_vec; |
---|
1826 | const char *list, *ext; |
---|
1827 | size_t i, path_len; |
---|
1828 | |
---|
1829 | path_len = strlen(path); |
---|
1830 | |
---|
1831 | // Scan user-defined mime types first, in case user wants to |
---|
1832 | // override default mime types. |
---|
1833 | list = ctx->config[EXTRA_MIME_TYPES]; |
---|
1834 | while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { |
---|
1835 | // ext now points to the path suffix |
---|
1836 | ext = path + path_len - ext_vec.len; |
---|
1837 | if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { |
---|
1838 | *vec = mime_vec; |
---|
1839 | return; |
---|
1840 | } |
---|
1841 | } |
---|
1842 | |
---|
1843 | // Now scan built-in mime types |
---|
1844 | for (i = 0; builtin_mime_types[i].extension != NULL; i++) { |
---|
1845 | ext = path + (path_len - builtin_mime_types[i].ext_len); |
---|
1846 | if (path_len > builtin_mime_types[i].ext_len && |
---|
1847 | mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) { |
---|
1848 | vec->ptr = builtin_mime_types[i].mime_type; |
---|
1849 | vec->len = builtin_mime_types[i].mime_type_len; |
---|
1850 | return; |
---|
1851 | } |
---|
1852 | } |
---|
1853 | |
---|
1854 | // Nothing found. Fall back to "text/plain" |
---|
1855 | vec->ptr = "text/plain"; |
---|
1856 | vec->len = 10; |
---|
1857 | } |
---|
1858 | |
---|
1859 | #ifndef HAVE_MD5 |
---|
1860 | typedef struct MD5Context { |
---|
1861 | uint32_t buf[4]; |
---|
1862 | uint32_t bits[2]; |
---|
1863 | unsigned char in[64]; |
---|
1864 | } MD5_CTX; |
---|
1865 | |
---|
1866 | #if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234) |
---|
1867 | #define byteReverse(buf, len) // Do nothing |
---|
1868 | #else |
---|
1869 | static void byteReverse(unsigned char *buf, unsigned longs) { |
---|
1870 | uint32_t t; |
---|
1871 | do { |
---|
1872 | t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | |
---|
1873 | ((unsigned) buf[1] << 8 | buf[0]); |
---|
1874 | *(uint32_t *) buf = t; |
---|
1875 | buf += 4; |
---|
1876 | } while (--longs); |
---|
1877 | } |
---|
1878 | #endif |
---|
1879 | |
---|
1880 | #define F1(x, y, z) (z ^ (x & (y ^ z))) |
---|
1881 | #define F2(x, y, z) F1(z, x, y) |
---|
1882 | #define F3(x, y, z) (x ^ y ^ z) |
---|
1883 | #define F4(x, y, z) (y ^ (x | ~z)) |
---|
1884 | |
---|
1885 | #define MD5STEP(f, w, x, y, z, data, s) \ |
---|
1886 | ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
---|
1887 | |
---|
1888 | // Start MD5 accumulation. Set bit count to 0 and buffer to mysterious |
---|
1889 | // initialization constants. |
---|
1890 | static void MD5Init(MD5_CTX *ctx) { |
---|
1891 | ctx->buf[0] = 0x67452301; |
---|
1892 | ctx->buf[1] = 0xefcdab89; |
---|
1893 | ctx->buf[2] = 0x98badcfe; |
---|
1894 | ctx->buf[3] = 0x10325476; |
---|
1895 | |
---|
1896 | ctx->bits[0] = 0; |
---|
1897 | ctx->bits[1] = 0; |
---|
1898 | } |
---|
1899 | |
---|
1900 | static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) { |
---|
1901 | register uint32_t a, b, c, d; |
---|
1902 | |
---|
1903 | a = buf[0]; |
---|
1904 | b = buf[1]; |
---|
1905 | c = buf[2]; |
---|
1906 | d = buf[3]; |
---|
1907 | |
---|
1908 | MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); |
---|
1909 | MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); |
---|
1910 | MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); |
---|
1911 | MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); |
---|
1912 | MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); |
---|
1913 | MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); |
---|
1914 | MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); |
---|
1915 | MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); |
---|
1916 | MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); |
---|
1917 | MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); |
---|
1918 | MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
---|
1919 | MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
---|
1920 | MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); |
---|
1921 | MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); |
---|
1922 | MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); |
---|
1923 | MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); |
---|
1924 | |
---|
1925 | MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); |
---|
1926 | MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); |
---|
1927 | MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
---|
1928 | MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); |
---|
1929 | MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); |
---|
1930 | MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); |
---|
1931 | MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
---|
1932 | MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); |
---|
1933 | MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); |
---|
1934 | MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
---|
1935 | MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); |
---|
1936 | MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); |
---|
1937 | MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
---|
1938 | MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); |
---|
1939 | MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); |
---|
1940 | MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
---|
1941 | |
---|
1942 | MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); |
---|
1943 | MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); |
---|
1944 | MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
---|
1945 | MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
---|
1946 | MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); |
---|
1947 | MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); |
---|
1948 | MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); |
---|
1949 | MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
---|
1950 | MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
---|
1951 | MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); |
---|
1952 | MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); |
---|
1953 | MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); |
---|
1954 | MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); |
---|
1955 | MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
---|
1956 | MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
---|
1957 | MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); |
---|
1958 | |
---|
1959 | MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); |
---|
1960 | MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); |
---|
1961 | MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
---|
1962 | MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); |
---|
1963 | MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
---|
1964 | MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); |
---|
1965 | MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
---|
1966 | MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); |
---|
1967 | MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); |
---|
1968 | MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
---|
1969 | MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); |
---|
1970 | MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
---|
1971 | MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); |
---|
1972 | MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
---|
1973 | MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); |
---|
1974 | MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); |
---|
1975 | |
---|
1976 | buf[0] += a; |
---|
1977 | buf[1] += b; |
---|
1978 | buf[2] += c; |
---|
1979 | buf[3] += d; |
---|
1980 | } |
---|
1981 | |
---|
1982 | static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) { |
---|
1983 | uint32_t t; |
---|
1984 | |
---|
1985 | t = ctx->bits[0]; |
---|
1986 | if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) |
---|
1987 | ctx->bits[1]++; |
---|
1988 | ctx->bits[1] += len >> 29; |
---|
1989 | |
---|
1990 | t = (t >> 3) & 0x3f; |
---|
1991 | |
---|
1992 | if (t) { |
---|
1993 | unsigned char *p = (unsigned char *) ctx->in + t; |
---|
1994 | |
---|
1995 | t = 64 - t; |
---|
1996 | if (len < t) { |
---|
1997 | memcpy(p, buf, len); |
---|
1998 | return; |
---|
1999 | } |
---|
2000 | memcpy(p, buf, t); |
---|
2001 | byteReverse(ctx->in, 16); |
---|
2002 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2003 | buf += t; |
---|
2004 | len -= t; |
---|
2005 | } |
---|
2006 | |
---|
2007 | while (len >= 64) { |
---|
2008 | memcpy(ctx->in, buf, 64); |
---|
2009 | byteReverse(ctx->in, 16); |
---|
2010 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2011 | buf += 64; |
---|
2012 | len -= 64; |
---|
2013 | } |
---|
2014 | |
---|
2015 | memcpy(ctx->in, buf, len); |
---|
2016 | } |
---|
2017 | |
---|
2018 | static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) { |
---|
2019 | unsigned count; |
---|
2020 | unsigned char *p; |
---|
2021 | |
---|
2022 | count = (ctx->bits[0] >> 3) & 0x3F; |
---|
2023 | |
---|
2024 | p = ctx->in + count; |
---|
2025 | *p++ = 0x80; |
---|
2026 | count = 64 - 1 - count; |
---|
2027 | if (count < 8) { |
---|
2028 | memset(p, 0, count); |
---|
2029 | byteReverse(ctx->in, 16); |
---|
2030 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2031 | memset(ctx->in, 0, 56); |
---|
2032 | } else { |
---|
2033 | memset(p, 0, count - 8); |
---|
2034 | } |
---|
2035 | byteReverse(ctx->in, 14); |
---|
2036 | |
---|
2037 | ((uint32_t *) ctx->in)[14] = ctx->bits[0]; |
---|
2038 | ((uint32_t *) ctx->in)[15] = ctx->bits[1]; |
---|
2039 | |
---|
2040 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2041 | byteReverse((unsigned char *) ctx->buf, 4); |
---|
2042 | memcpy(digest, ctx->buf, 16); |
---|
2043 | memset((char *) ctx, 0, sizeof(*ctx)); |
---|
2044 | } |
---|
2045 | #endif // !HAVE_MD5 |
---|
2046 | |
---|
2047 | // Stringify binary data. Output buffer must be twice as big as input, |
---|
2048 | // because each byte takes 2 bytes in string representation |
---|
2049 | static void bin2str(char *to, const unsigned char *p, size_t len) { |
---|
2050 | static const char *hex = "0123456789abcdef"; |
---|
2051 | |
---|
2052 | for (; len--; p++) { |
---|
2053 | *to++ = hex[p[0] >> 4]; |
---|
2054 | *to++ = hex[p[0] & 0x0f]; |
---|
2055 | } |
---|
2056 | *to = '\0'; |
---|
2057 | } |
---|
2058 | |
---|
2059 | // Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes. |
---|
2060 | void mg_md5(char *buf, ...) { |
---|
2061 | unsigned char hash[16]; |
---|
2062 | const char *p; |
---|
2063 | va_list ap; |
---|
2064 | MD5_CTX ctx; |
---|
2065 | |
---|
2066 | MD5Init(&ctx); |
---|
2067 | |
---|
2068 | va_start(ap, buf); |
---|
2069 | while ((p = va_arg(ap, const char *)) != NULL) { |
---|
2070 | MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p)); |
---|
2071 | } |
---|
2072 | va_end(ap); |
---|
2073 | |
---|
2074 | MD5Final(hash, &ctx); |
---|
2075 | bin2str(buf, hash, sizeof(hash)); |
---|
2076 | } |
---|
2077 | |
---|
2078 | // Check the user's password, return 1 if OK |
---|
2079 | static int check_password(const char *method, const char *ha1, const char *uri, |
---|
2080 | const char *nonce, const char *nc, const char *cnonce, |
---|
2081 | const char *qop, const char *response) { |
---|
2082 | char ha2[32 + 1], expected_response[32 + 1]; |
---|
2083 | |
---|
2084 | // Some of the parameters may be NULL |
---|
2085 | if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL || |
---|
2086 | qop == NULL || response == NULL) { |
---|
2087 | return 0; |
---|
2088 | } |
---|
2089 | |
---|
2090 | // NOTE(lsm): due to a bug in MSIE, we do not compare the URI |
---|
2091 | // TODO(lsm): check for authentication timeout |
---|
2092 | if (// strcmp(dig->uri, c->ouri) != 0 || |
---|
2093 | strlen(response) != 32 |
---|
2094 | // || now - strtoul(dig->nonce, NULL, 10) > 3600 |
---|
2095 | ) { |
---|
2096 | return 0; |
---|
2097 | } |
---|
2098 | |
---|
2099 | mg_md5(ha2, method, ":", uri, NULL); |
---|
2100 | mg_md5(expected_response, ha1, ":", nonce, ":", nc, |
---|
2101 | ":", cnonce, ":", qop, ":", ha2, NULL); |
---|
2102 | |
---|
2103 | return mg_strcasecmp(response, expected_response) == 0; |
---|
2104 | } |
---|
2105 | |
---|
2106 | // Use the global passwords file, if specified by auth_gpass option, |
---|
2107 | // or search for .htpasswd in the requested directory. |
---|
2108 | static FILE *open_auth_file(struct mg_connection *conn, const char *path) { |
---|
2109 | struct mg_context *ctx = conn->ctx; |
---|
2110 | char name[PATH_MAX]; |
---|
2111 | const char *p, *e; |
---|
2112 | struct mgstat st; |
---|
2113 | FILE *fp; |
---|
2114 | |
---|
2115 | if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) { |
---|
2116 | // Use global passwords file |
---|
2117 | fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r"); |
---|
2118 | if (fp == NULL) |
---|
2119 | cry(fc(ctx), "fopen(%s): %s", |
---|
2120 | ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO)); |
---|
2121 | } else if (!mg_stat(path, &st) && st.is_directory) { |
---|
2122 | (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s", |
---|
2123 | path, DIRSEP, PASSWORDS_FILE_NAME); |
---|
2124 | fp = mg_fopen(name, "r"); |
---|
2125 | } else { |
---|
2126 | // Try to find .htpasswd in requested directory. |
---|
2127 | for (p = path, e = p + strlen(p) - 1; e > p; e--) |
---|
2128 | if (IS_DIRSEP_CHAR(*e)) |
---|
2129 | break; |
---|
2130 | (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", |
---|
2131 | (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME); |
---|
2132 | fp = mg_fopen(name, "r"); |
---|
2133 | } |
---|
2134 | |
---|
2135 | return fp; |
---|
2136 | } |
---|
2137 | |
---|
2138 | // Parsed Authorization header |
---|
2139 | struct ah { |
---|
2140 | char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; |
---|
2141 | }; |
---|
2142 | |
---|
2143 | static int parse_auth_header(struct mg_connection *conn, char *buf, |
---|
2144 | size_t buf_size, struct ah *ah) { |
---|
2145 | char *name, *value, *s; |
---|
2146 | const char *auth_header; |
---|
2147 | |
---|
2148 | if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || |
---|
2149 | mg_strncasecmp(auth_header, "Digest ", 7) != 0) { |
---|
2150 | return 0; |
---|
2151 | } |
---|
2152 | |
---|
2153 | // Make modifiable copy of the auth header |
---|
2154 | (void) mg_strlcpy(buf, auth_header + 7, buf_size); |
---|
2155 | |
---|
2156 | s = buf; |
---|
2157 | (void) memset(ah, 0, sizeof(*ah)); |
---|
2158 | |
---|
2159 | // Parse authorization header |
---|
2160 | for (;;) { |
---|
2161 | // Gobble initial spaces |
---|
2162 | while (isspace(* (unsigned char *) s)) { |
---|
2163 | s++; |
---|
2164 | } |
---|
2165 | name = skip_quoted(&s, "=", " ", 0); |
---|
2166 | // Value is either quote-delimited, or ends at first comma or space. |
---|
2167 | if (s[0] == '\"') { |
---|
2168 | s++; |
---|
2169 | value = skip_quoted(&s, "\"", " ", '\\'); |
---|
2170 | if (s[0] == ',') { |
---|
2171 | s++; |
---|
2172 | } |
---|
2173 | } else { |
---|
2174 | value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces |
---|
2175 | } |
---|
2176 | if (*name == '\0') { |
---|
2177 | break; |
---|
2178 | } |
---|
2179 | |
---|
2180 | if (!strcmp(name, "username")) { |
---|
2181 | ah->user = value; |
---|
2182 | } else if (!strcmp(name, "cnonce")) { |
---|
2183 | ah->cnonce = value; |
---|
2184 | } else if (!strcmp(name, "response")) { |
---|
2185 | ah->response = value; |
---|
2186 | } else if (!strcmp(name, "uri")) { |
---|
2187 | ah->uri = value; |
---|
2188 | } else if (!strcmp(name, "qop")) { |
---|
2189 | ah->qop = value; |
---|
2190 | } else if (!strcmp(name, "nc")) { |
---|
2191 | ah->nc = value; |
---|
2192 | } else if (!strcmp(name, "nonce")) { |
---|
2193 | ah->nonce = value; |
---|
2194 | } |
---|
2195 | } |
---|
2196 | |
---|
2197 | // CGI needs it as REMOTE_USER |
---|
2198 | if (ah->user != NULL) { |
---|
2199 | conn->request_info.remote_user = mg_strdup(ah->user); |
---|
2200 | } else { |
---|
2201 | return 0; |
---|
2202 | } |
---|
2203 | |
---|
2204 | return 1; |
---|
2205 | } |
---|
2206 | |
---|
2207 | // Authorize against the opened passwords file. Return 1 if authorized. |
---|
2208 | static int authorize(struct mg_connection *conn, FILE *fp) { |
---|
2209 | struct ah ah; |
---|
2210 | char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ]; |
---|
2211 | |
---|
2212 | if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) { |
---|
2213 | return 0; |
---|
2214 | } |
---|
2215 | |
---|
2216 | // Loop over passwords file |
---|
2217 | while (fgets(line, sizeof(line), fp) != NULL) { |
---|
2218 | if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) { |
---|
2219 | continue; |
---|
2220 | } |
---|
2221 | |
---|
2222 | if (!strcmp(ah.user, f_user) && |
---|
2223 | !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain)) |
---|
2224 | return check_password( |
---|
2225 | conn->request_info.request_method, |
---|
2226 | ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop, |
---|
2227 | ah.response); |
---|
2228 | } |
---|
2229 | |
---|
2230 | return 0; |
---|
2231 | } |
---|
2232 | |
---|
2233 | // Return 1 if request is authorised, 0 otherwise. |
---|
2234 | static int check_authorization(struct mg_connection *conn, const char *path) { |
---|
2235 | FILE *fp; |
---|
2236 | char fname[PATH_MAX]; |
---|
2237 | struct vec uri_vec, filename_vec; |
---|
2238 | const char *list; |
---|
2239 | int authorized; |
---|
2240 | |
---|
2241 | fp = NULL; |
---|
2242 | authorized = 1; |
---|
2243 | |
---|
2244 | list = conn->ctx->config[PROTECT_URI]; |
---|
2245 | while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { |
---|
2246 | if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { |
---|
2247 | (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s", |
---|
2248 | filename_vec.len, filename_vec.ptr); |
---|
2249 | if ((fp = mg_fopen(fname, "r")) == NULL) { |
---|
2250 | cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno)); |
---|
2251 | } |
---|
2252 | break; |
---|
2253 | } |
---|
2254 | } |
---|
2255 | |
---|
2256 | if (fp == NULL) { |
---|
2257 | fp = open_auth_file(conn, path); |
---|
2258 | } |
---|
2259 | |
---|
2260 | if (fp != NULL) { |
---|
2261 | authorized = authorize(conn, fp); |
---|
2262 | (void) fclose(fp); |
---|
2263 | } |
---|
2264 | |
---|
2265 | return authorized; |
---|
2266 | } |
---|
2267 | |
---|
2268 | static void send_authorization_request(struct mg_connection *conn) { |
---|
2269 | conn->request_info.status_code = 401; |
---|
2270 | (void) mg_printf(conn, |
---|
2271 | "HTTP/1.1 401 Unauthorized\r\n" |
---|
2272 | "Content-Length: 0\r\n" |
---|
2273 | "WWW-Authenticate: Digest qop=\"auth\", " |
---|
2274 | "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", |
---|
2275 | conn->ctx->config[AUTHENTICATION_DOMAIN], |
---|
2276 | (unsigned long) time(NULL)); |
---|
2277 | } |
---|
2278 | |
---|
2279 | static int is_authorized_for_put(struct mg_connection *conn) { |
---|
2280 | FILE *fp; |
---|
2281 | int ret = 0; |
---|
2282 | |
---|
2283 | fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL : |
---|
2284 | mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r"); |
---|
2285 | |
---|
2286 | if (fp != NULL) { |
---|
2287 | ret = authorize(conn, fp); |
---|
2288 | (void) fclose(fp); |
---|
2289 | } |
---|
2290 | |
---|
2291 | return ret; |
---|
2292 | } |
---|
2293 | |
---|
2294 | int mg_modify_passwords_file(const char *fname, const char *domain, |
---|
2295 | const char *user, const char *pass) { |
---|
2296 | int found; |
---|
2297 | char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX]; |
---|
2298 | FILE *fp, *fp2; |
---|
2299 | |
---|
2300 | found = 0; |
---|
2301 | fp = fp2 = NULL; |
---|
2302 | |
---|
2303 | // Regard empty password as no password - remove user record. |
---|
2304 | if (pass != NULL && pass[0] == '\0') { |
---|
2305 | pass = NULL; |
---|
2306 | } |
---|
2307 | |
---|
2308 | (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); |
---|
2309 | |
---|
2310 | // Create the file if does not exist |
---|
2311 | if ((fp = mg_fopen(fname, "a+")) != NULL) { |
---|
2312 | (void) fclose(fp); |
---|
2313 | } |
---|
2314 | |
---|
2315 | // Open the given file and temporary file |
---|
2316 | if ((fp = mg_fopen(fname, "r")) == NULL) { |
---|
2317 | return 0; |
---|
2318 | } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) { |
---|
2319 | fclose(fp); |
---|
2320 | return 0; |
---|
2321 | } |
---|
2322 | |
---|
2323 | // Copy the stuff to temporary file |
---|
2324 | while (fgets(line, sizeof(line), fp) != NULL) { |
---|
2325 | if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) { |
---|
2326 | continue; |
---|
2327 | } |
---|
2328 | |
---|
2329 | if (!strcmp(u, user) && !strcmp(d, domain)) { |
---|
2330 | found++; |
---|
2331 | if (pass != NULL) { |
---|
2332 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
2333 | fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
2334 | } |
---|
2335 | } else { |
---|
2336 | (void) fprintf(fp2, "%s", line); |
---|
2337 | } |
---|
2338 | } |
---|
2339 | |
---|
2340 | // If new user, just add it |
---|
2341 | if (!found && pass != NULL) { |
---|
2342 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
2343 | (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
2344 | } |
---|
2345 | |
---|
2346 | // Close files |
---|
2347 | (void) fclose(fp); |
---|
2348 | (void) fclose(fp2); |
---|
2349 | |
---|
2350 | // Put the temp file in place of real file |
---|
2351 | (void) mg_remove(fname); |
---|
2352 | (void) mg_rename(tmp, fname); |
---|
2353 | |
---|
2354 | return 1; |
---|
2355 | } |
---|
2356 | |
---|
2357 | struct de { |
---|
2358 | struct mg_connection *conn; |
---|
2359 | char *file_name; |
---|
2360 | struct mgstat st; |
---|
2361 | }; |
---|
2362 | |
---|
2363 | static void url_encode(const char *src, char *dst, size_t dst_len) { |
---|
2364 | static const char *dont_escape = "._-$,;~()"; |
---|
2365 | static const char *hex = "0123456789abcdef"; |
---|
2366 | const char *end = dst + dst_len - 1; |
---|
2367 | |
---|
2368 | for (; *src != '\0' && dst < end; src++, dst++) { |
---|
2369 | if (isalnum(*(const unsigned char *) src) || |
---|
2370 | strchr(dont_escape, * (const unsigned char *) src) != NULL) { |
---|
2371 | *dst = *src; |
---|
2372 | } else if (dst + 2 < end) { |
---|
2373 | dst[0] = '%'; |
---|
2374 | dst[1] = hex[(* (const unsigned char *) src) >> 4]; |
---|
2375 | dst[2] = hex[(* (const unsigned char *) src) & 0xf]; |
---|
2376 | dst += 2; |
---|
2377 | } |
---|
2378 | } |
---|
2379 | |
---|
2380 | *dst = '\0'; |
---|
2381 | } |
---|
2382 | |
---|
2383 | static void print_dir_entry(struct de *de) { |
---|
2384 | char size[64], mod[64], href[PATH_MAX]; |
---|
2385 | |
---|
2386 | if (de->st.is_directory) { |
---|
2387 | (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]"); |
---|
2388 | } else { |
---|
2389 | // We use (signed) cast below because MSVC 6 compiler cannot |
---|
2390 | // convert unsigned __int64 to double. Sigh. |
---|
2391 | if (de->st.size < 1024) { |
---|
2392 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2393 | "%lu", (unsigned long) de->st.size); |
---|
2394 | } else if (de->st.size < 1024 * 1024) { |
---|
2395 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2396 | "%.1fk", (double) de->st.size / 1024.0); |
---|
2397 | } else if (de->st.size < 1024 * 1024 * 1024) { |
---|
2398 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2399 | "%.1fM", (double) de->st.size / 1048576); |
---|
2400 | } else { |
---|
2401 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2402 | "%.1fG", (double) de->st.size / 1073741824); |
---|
2403 | } |
---|
2404 | } |
---|
2405 | (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime)); |
---|
2406 | url_encode(de->file_name, href, sizeof(href)); |
---|
2407 | de->conn->num_bytes_sent += mg_printf(de->conn, |
---|
2408 | "<tr><td><a href=\"%s%s%s\">%s%s</a></td>" |
---|
2409 | "<td> %s</td><td> %s</td></tr>\n", |
---|
2410 | de->conn->request_info.uri, href, de->st.is_directory ? "/" : "", |
---|
2411 | de->file_name, de->st.is_directory ? "/" : "", mod, size); |
---|
2412 | } |
---|
2413 | |
---|
2414 | // This function is called from send_directory() and used for |
---|
2415 | // sorting directory entries by size, or name, or modification time. |
---|
2416 | // On windows, __cdecl specification is needed in case if project is built |
---|
2417 | // with __stdcall convention. qsort always requires __cdels callback. |
---|
2418 | static int WINCDECL compare_dir_entries(const void *p1, const void *p2) { |
---|
2419 | const struct de *a = (const struct de *) p1, *b = (const struct de *) p2; |
---|
2420 | const char *query_string = a->conn->request_info.query_string; |
---|
2421 | int cmp_result = 0; |
---|
2422 | |
---|
2423 | if (query_string == NULL) { |
---|
2424 | query_string = "na"; |
---|
2425 | } |
---|
2426 | |
---|
2427 | if (a->st.is_directory && !b->st.is_directory) { |
---|
2428 | return -1; // Always put directories on top |
---|
2429 | } else if (!a->st.is_directory && b->st.is_directory) { |
---|
2430 | return 1; // Always put directories on top |
---|
2431 | } else if (*query_string == 'n') { |
---|
2432 | cmp_result = strcmp(a->file_name, b->file_name); |
---|
2433 | } else if (*query_string == 's') { |
---|
2434 | cmp_result = a->st.size == b->st.size ? 0 : |
---|
2435 | a->st.size > b->st.size ? 1 : -1; |
---|
2436 | } else if (*query_string == 'd') { |
---|
2437 | cmp_result = a->st.mtime == b->st.mtime ? 0 : |
---|
2438 | a->st.mtime > b->st.mtime ? 1 : -1; |
---|
2439 | } |
---|
2440 | |
---|
2441 | return query_string[1] == 'd' ? -cmp_result : cmp_result; |
---|
2442 | } |
---|
2443 | |
---|
2444 | static int scan_directory(struct mg_connection *conn, const char *dir, |
---|
2445 | void *data, void (*cb)(struct de *, void *)) { |
---|
2446 | char path[PATH_MAX]; |
---|
2447 | struct dirent *dp; |
---|
2448 | DIR *dirp; |
---|
2449 | struct de de; |
---|
2450 | |
---|
2451 | if ((dirp = opendir(dir)) == NULL) { |
---|
2452 | return 0; |
---|
2453 | } else { |
---|
2454 | de.conn = conn; |
---|
2455 | |
---|
2456 | while ((dp = readdir(dirp)) != NULL) { |
---|
2457 | // Do not show current dir and passwords file |
---|
2458 | if (!strcmp(dp->d_name, ".") || |
---|
2459 | !strcmp(dp->d_name, "..") || |
---|
2460 | !strcmp(dp->d_name, PASSWORDS_FILE_NAME)) |
---|
2461 | continue; |
---|
2462 | |
---|
2463 | mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name); |
---|
2464 | |
---|
2465 | // If we don't memset stat structure to zero, mtime will have |
---|
2466 | // garbage and strftime() will segfault later on in |
---|
2467 | // print_dir_entry(). memset is required only if mg_stat() |
---|
2468 | // fails. For more details, see |
---|
2469 | // http://code.google.com/p/mongoose/issues/detail?id=79 |
---|
2470 | if (mg_stat(path, &de.st) != 0) { |
---|
2471 | memset(&de.st, 0, sizeof(de.st)); |
---|
2472 | } |
---|
2473 | de.file_name = dp->d_name; |
---|
2474 | |
---|
2475 | cb(&de, data); |
---|
2476 | } |
---|
2477 | (void) closedir(dirp); |
---|
2478 | } |
---|
2479 | return 1; |
---|
2480 | } |
---|
2481 | |
---|
2482 | struct dir_scan_data { |
---|
2483 | struct de *entries; |
---|
2484 | int num_entries; |
---|
2485 | int arr_size; |
---|
2486 | }; |
---|
2487 | |
---|
2488 | static void dir_scan_callback(struct de *de, void *data) { |
---|
2489 | struct dir_scan_data *dsd = (struct dir_scan_data *) data; |
---|
2490 | |
---|
2491 | if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) { |
---|
2492 | dsd->arr_size *= 2; |
---|
2493 | dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size * |
---|
2494 | sizeof(dsd->entries[0])); |
---|
2495 | } |
---|
2496 | if (dsd->entries == NULL) { |
---|
2497 | // TODO(lsm): propagate an error to the caller |
---|
2498 | dsd->num_entries = 0; |
---|
2499 | } else { |
---|
2500 | dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name); |
---|
2501 | dsd->entries[dsd->num_entries].st = de->st; |
---|
2502 | dsd->entries[dsd->num_entries].conn = de->conn; |
---|
2503 | dsd->num_entries++; |
---|
2504 | } |
---|
2505 | } |
---|
2506 | |
---|
2507 | static void handle_directory_request(struct mg_connection *conn, |
---|
2508 | const char *dir) { |
---|
2509 | int i, sort_direction; |
---|
2510 | struct dir_scan_data data = { NULL, 0, 128 }; |
---|
2511 | |
---|
2512 | if (!scan_directory(conn, dir, &data, dir_scan_callback)) { |
---|
2513 | send_http_error(conn, 500, "Cannot open directory", |
---|
2514 | "Error: opendir(%s): %s", dir, strerror(ERRNO)); |
---|
2515 | return; |
---|
2516 | } |
---|
2517 | |
---|
2518 | sort_direction = conn->request_info.query_string != NULL && |
---|
2519 | conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; |
---|
2520 | |
---|
2521 | conn->must_close = 1; |
---|
2522 | mg_printf(conn, "%s", |
---|
2523 | "HTTP/1.1 200 OK\r\n" |
---|
2524 | "Connection: close\r\n" |
---|
2525 | "Content-Type: text/html; charset=utf-8\r\n\r\n"); |
---|
2526 | |
---|
2527 | conn->num_bytes_sent += mg_printf(conn, |
---|
2528 | "<html><head><title>Index of %s</title>" |
---|
2529 | "<style>th {text-align: left;}</style></head>" |
---|
2530 | "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" |
---|
2531 | "<tr><th><a href=\"?n%c\">Name</a></th>" |
---|
2532 | "<th><a href=\"?d%c\">Modified</a></th>" |
---|
2533 | "<th><a href=\"?s%c\">Size</a></th></tr>" |
---|
2534 | "<tr><td colspan=\"3\"><hr></td></tr>", |
---|
2535 | conn->request_info.uri, conn->request_info.uri, |
---|
2536 | sort_direction, sort_direction, sort_direction); |
---|
2537 | |
---|
2538 | // Print first entry - link to a parent directory |
---|
2539 | conn->num_bytes_sent += mg_printf(conn, |
---|
2540 | "<tr><td><a href=\"%s%s\">%s</a></td>" |
---|
2541 | "<td> %s</td><td> %s</td></tr>\n", |
---|
2542 | conn->request_info.uri, "..", "Parent directory", "-", "-"); |
---|
2543 | |
---|
2544 | // Sort and print directory entries |
---|
2545 | qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]), |
---|
2546 | compare_dir_entries); |
---|
2547 | for (i = 0; i < data.num_entries; i++) { |
---|
2548 | print_dir_entry(&data.entries[i]); |
---|
2549 | free(data.entries[i].file_name); |
---|
2550 | } |
---|
2551 | free(data.entries); |
---|
2552 | |
---|
2553 | conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>"); |
---|
2554 | conn->request_info.status_code = 200; |
---|
2555 | } |
---|
2556 | |
---|
2557 | // Send len bytes from the opened file to the client. |
---|
2558 | static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) { |
---|
2559 | char buf[BUFSIZ]; |
---|
2560 | int to_read, num_read, num_written; |
---|
2561 | |
---|
2562 | while (len > 0) { |
---|
2563 | // Calculate how much to read from the file in the buffer |
---|
2564 | to_read = sizeof(buf); |
---|
2565 | if ((int64_t) to_read > len) |
---|
2566 | to_read = (int) len; |
---|
2567 | |
---|
2568 | // Read from file, exit the loop on error |
---|
2569 | if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0) |
---|
2570 | break; |
---|
2571 | |
---|
2572 | // Send read bytes to the client, exit the loop on error |
---|
2573 | if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read) |
---|
2574 | break; |
---|
2575 | |
---|
2576 | // Both read and were successful, adjust counters |
---|
2577 | conn->num_bytes_sent += num_written; |
---|
2578 | len -= num_written; |
---|
2579 | } |
---|
2580 | } |
---|
2581 | |
---|
2582 | static int parse_range_header(const char *header, int64_t *a, int64_t *b) { |
---|
2583 | return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); |
---|
2584 | } |
---|
2585 | |
---|
2586 | static void gmt_time_string(char *buf, size_t buf_len, time_t *t) { |
---|
2587 | strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); |
---|
2588 | } |
---|
2589 | |
---|
2590 | static void handle_file_request(struct mg_connection *conn, const char *path, |
---|
2591 | struct mgstat *stp) { |
---|
2592 | char date[64], lm[64], etag[64], range[64]; |
---|
2593 | const char *msg = "OK", *hdr; |
---|
2594 | time_t curtime = time(NULL); |
---|
2595 | int64_t cl, r1, r2; |
---|
2596 | struct vec mime_vec; |
---|
2597 | FILE *fp; |
---|
2598 | int n; |
---|
2599 | |
---|
2600 | get_mime_type(conn->ctx, path, &mime_vec); |
---|
2601 | cl = stp->size; |
---|
2602 | conn->request_info.status_code = 200; |
---|
2603 | range[0] = '\0'; |
---|
2604 | |
---|
2605 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
2606 | send_http_error(conn, 500, http_500_error, |
---|
2607 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
2608 | return; |
---|
2609 | } |
---|
2610 | set_close_on_exec(fileno(fp)); |
---|
2611 | |
---|
2612 | // If Range: header specified, act accordingly |
---|
2613 | r1 = r2 = 0; |
---|
2614 | hdr = mg_get_header(conn, "Range"); |
---|
2615 | if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) { |
---|
2616 | conn->request_info.status_code = 206; |
---|
2617 | (void) fseeko(fp, (off_t) r1, SEEK_SET); |
---|
2618 | cl = n == 2 ? r2 - r1 + 1: cl - r1; |
---|
2619 | (void) mg_snprintf(conn, range, sizeof(range), |
---|
2620 | "Content-Range: bytes " |
---|
2621 | "%" INT64_FMT "-%" |
---|
2622 | INT64_FMT "/%" INT64_FMT "\r\n", |
---|
2623 | r1, r1 + cl - 1, stp->size); |
---|
2624 | msg = "Partial Content"; |
---|
2625 | } |
---|
2626 | |
---|
2627 | // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to |
---|
2628 | // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 |
---|
2629 | gmt_time_string(date, sizeof(date), &curtime); |
---|
2630 | gmt_time_string(lm, sizeof(lm), &stp->mtime); |
---|
2631 | (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx", |
---|
2632 | (unsigned long) stp->mtime, (unsigned long) stp->size); |
---|
2633 | |
---|
2634 | (void) mg_printf(conn, |
---|
2635 | "HTTP/1.1 %d %s\r\n" |
---|
2636 | "Date: %s\r\n" |
---|
2637 | "Last-Modified: %s\r\n" |
---|
2638 | "Etag: \"%s\"\r\n" |
---|
2639 | "Content-Type: %.*s\r\n" |
---|
2640 | "Content-Length: %" INT64_FMT "\r\n" |
---|
2641 | "Connection: %s\r\n" |
---|
2642 | "Accept-Ranges: bytes\r\n" |
---|
2643 | "%s\r\n", |
---|
2644 | conn->request_info.status_code, msg, date, lm, etag, (int) mime_vec.len, |
---|
2645 | mime_vec.ptr, cl, suggest_connection_header(conn), range); |
---|
2646 | |
---|
2647 | if (strcmp(conn->request_info.request_method, "HEAD") != 0) { |
---|
2648 | send_file_data(conn, fp, cl); |
---|
2649 | } |
---|
2650 | (void) fclose(fp); |
---|
2651 | } |
---|
2652 | |
---|
2653 | void mg_send_file(struct mg_connection *conn, const char *path) { |
---|
2654 | struct mgstat st; |
---|
2655 | if (mg_stat(path, &st) == 0) { |
---|
2656 | handle_file_request(conn, path, &st); |
---|
2657 | } else { |
---|
2658 | send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
2659 | } |
---|
2660 | } |
---|
2661 | |
---|
2662 | |
---|
2663 | // Parse HTTP headers from the given buffer, advance buffer to the point |
---|
2664 | // where parsing stopped. |
---|
2665 | static void parse_http_headers(char **buf, struct mg_request_info *ri) { |
---|
2666 | int i; |
---|
2667 | |
---|
2668 | for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) { |
---|
2669 | ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0); |
---|
2670 | ri->http_headers[i].value = skip(buf, "\r\n"); |
---|
2671 | if (ri->http_headers[i].name[0] == '\0') |
---|
2672 | break; |
---|
2673 | ri->num_headers = i + 1; |
---|
2674 | } |
---|
2675 | } |
---|
2676 | |
---|
2677 | static int is_valid_http_method(const char *method) { |
---|
2678 | return !strcmp(method, "GET") || !strcmp(method, "POST") || |
---|
2679 | !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") || |
---|
2680 | !strcmp(method, "PUT") || !strcmp(method, "DELETE") || |
---|
2681 | !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND"); |
---|
2682 | } |
---|
2683 | |
---|
2684 | // Parse HTTP request, fill in mg_request_info structure. |
---|
2685 | static int parse_http_request(char *buf, struct mg_request_info *ri) { |
---|
2686 | int status = 0; |
---|
2687 | |
---|
2688 | // RFC says that all initial whitespaces should be ingored |
---|
2689 | while (*buf != '\0' && isspace(* (unsigned char *) buf)) { |
---|
2690 | buf++; |
---|
2691 | } |
---|
2692 | |
---|
2693 | ri->request_method = skip(&buf, " "); |
---|
2694 | ri->uri = skip(&buf, " "); |
---|
2695 | ri->http_version = skip(&buf, "\r\n"); |
---|
2696 | |
---|
2697 | if (is_valid_http_method(ri->request_method) && |
---|
2698 | strncmp(ri->http_version, "HTTP/", 5) == 0) { |
---|
2699 | ri->http_version += 5; // Skip "HTTP/" |
---|
2700 | parse_http_headers(&buf, ri); |
---|
2701 | status = 1; |
---|
2702 | } |
---|
2703 | |
---|
2704 | return status; |
---|
2705 | } |
---|
2706 | |
---|
2707 | // Keep reading the input (either opened file descriptor fd, or socket sock, |
---|
2708 | // or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the |
---|
2709 | // buffer (which marks the end of HTTP request). Buffer buf may already |
---|
2710 | // have some data. The length of the data is stored in nread. |
---|
2711 | // Upon every read operation, increase nread by the number of bytes read. |
---|
2712 | static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz, |
---|
2713 | int *nread) { |
---|
2714 | int request_len, n = 0; |
---|
2715 | |
---|
2716 | do { |
---|
2717 | request_len = get_request_len(buf, *nread); |
---|
2718 | if (request_len == 0 && |
---|
2719 | (n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread)) > 0) { |
---|
2720 | *nread += n; |
---|
2721 | } |
---|
2722 | } while (*nread < bufsiz && request_len == 0 && n > 0); |
---|
2723 | |
---|
2724 | return request_len; |
---|
2725 | } |
---|
2726 | |
---|
2727 | // For given directory path, substitute it to valid index file. |
---|
2728 | // Return 0 if index file has been found, -1 if not found. |
---|
2729 | // If the file is found, it's stats is returned in stp. |
---|
2730 | static int substitute_index_file(struct mg_connection *conn, char *path, |
---|
2731 | size_t path_len, struct mgstat *stp) { |
---|
2732 | const char *list = conn->ctx->config[INDEX_FILES]; |
---|
2733 | struct mgstat st; |
---|
2734 | struct vec filename_vec; |
---|
2735 | size_t n = strlen(path); |
---|
2736 | int found = 0; |
---|
2737 | |
---|
2738 | // The 'path' given to us points to the directory. Remove all trailing |
---|
2739 | // directory separator characters from the end of the path, and |
---|
2740 | // then append single directory separator character. |
---|
2741 | while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) { |
---|
2742 | n--; |
---|
2743 | } |
---|
2744 | path[n] = DIRSEP; |
---|
2745 | |
---|
2746 | // Traverse index files list. For each entry, append it to the given |
---|
2747 | // path and see if the file exists. If it exists, break the loop |
---|
2748 | while ((list = next_option(list, &filename_vec, NULL)) != NULL) { |
---|
2749 | |
---|
2750 | // Ignore too long entries that may overflow path buffer |
---|
2751 | if (filename_vec.len > path_len - (n + 2)) |
---|
2752 | continue; |
---|
2753 | |
---|
2754 | // Prepare full path to the index file |
---|
2755 | (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1); |
---|
2756 | |
---|
2757 | // Does it exist? |
---|
2758 | if (mg_stat(path, &st) == 0) { |
---|
2759 | // Yes it does, break the loop |
---|
2760 | *stp = st; |
---|
2761 | found = 1; |
---|
2762 | break; |
---|
2763 | } |
---|
2764 | } |
---|
2765 | |
---|
2766 | // If no index file exists, restore directory path |
---|
2767 | if (!found) { |
---|
2768 | path[n] = '\0'; |
---|
2769 | } |
---|
2770 | |
---|
2771 | return found; |
---|
2772 | } |
---|
2773 | |
---|
2774 | // Return True if we should reply 304 Not Modified. |
---|
2775 | static int is_not_modified(const struct mg_connection *conn, |
---|
2776 | const struct mgstat *stp) { |
---|
2777 | const char *ims = mg_get_header(conn, "If-Modified-Since"); |
---|
2778 | return ims != NULL && stp->mtime <= parse_date_string(ims); |
---|
2779 | } |
---|
2780 | |
---|
2781 | static int forward_body_data(struct mg_connection *conn, FILE *fp, |
---|
2782 | SOCKET sock, SSL *ssl) { |
---|
2783 | const char *expect, *buffered; |
---|
2784 | char buf[BUFSIZ]; |
---|
2785 | int to_read, nread, buffered_len, success = 0; |
---|
2786 | |
---|
2787 | expect = mg_get_header(conn, "Expect"); |
---|
2788 | assert(fp != NULL); |
---|
2789 | |
---|
2790 | if (conn->content_len == -1) { |
---|
2791 | send_http_error(conn, 411, "Length Required", ""); |
---|
2792 | } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) { |
---|
2793 | send_http_error(conn, 417, "Expectation Failed", ""); |
---|
2794 | } else { |
---|
2795 | if (expect != NULL) { |
---|
2796 | (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n"); |
---|
2797 | } |
---|
2798 | |
---|
2799 | buffered = conn->buf + conn->request_len; |
---|
2800 | buffered_len = conn->data_len - conn->request_len; |
---|
2801 | assert(buffered_len >= 0); |
---|
2802 | assert(conn->consumed_content == 0); |
---|
2803 | |
---|
2804 | if (buffered_len > 0) { |
---|
2805 | if ((int64_t) buffered_len > conn->content_len) { |
---|
2806 | buffered_len = (int) conn->content_len; |
---|
2807 | } |
---|
2808 | push(fp, sock, ssl, buffered, (int64_t) buffered_len); |
---|
2809 | conn->consumed_content += buffered_len; |
---|
2810 | } |
---|
2811 | |
---|
2812 | while (conn->consumed_content < conn->content_len) { |
---|
2813 | to_read = sizeof(buf); |
---|
2814 | if ((int64_t) to_read > conn->content_len - conn->consumed_content) { |
---|
2815 | to_read = (int) (conn->content_len - conn->consumed_content); |
---|
2816 | } |
---|
2817 | nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read); |
---|
2818 | if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) { |
---|
2819 | break; |
---|
2820 | } |
---|
2821 | conn->consumed_content += nread; |
---|
2822 | } |
---|
2823 | |
---|
2824 | if (conn->consumed_content == conn->content_len) { |
---|
2825 | success = 1; |
---|
2826 | } |
---|
2827 | |
---|
2828 | // Each error code path in this function must send an error |
---|
2829 | if (!success) { |
---|
2830 | send_http_error(conn, 577, http_500_error, ""); |
---|
2831 | } |
---|
2832 | } |
---|
2833 | |
---|
2834 | return success; |
---|
2835 | } |
---|
2836 | |
---|
2837 | #if !defined(NO_CGI) |
---|
2838 | // This structure helps to create an environment for the spawned CGI program. |
---|
2839 | // Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, |
---|
2840 | // last element must be NULL. |
---|
2841 | // However, on Windows there is a requirement that all these VARIABLE=VALUE\0 |
---|
2842 | // strings must reside in a contiguous buffer. The end of the buffer is |
---|
2843 | // marked by two '\0' characters. |
---|
2844 | // We satisfy both worlds: we create an envp array (which is vars), all |
---|
2845 | // entries are actually pointers inside buf. |
---|
2846 | struct cgi_env_block { |
---|
2847 | struct mg_connection *conn; |
---|
2848 | char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer |
---|
2849 | int len; // Space taken |
---|
2850 | char *vars[MAX_CGI_ENVIR_VARS]; // char **envp |
---|
2851 | int nvars; // Number of variables |
---|
2852 | }; |
---|
2853 | |
---|
2854 | // Append VARIABLE=VALUE\0 string to the buffer, and add a respective |
---|
2855 | // pointer into the vars array. |
---|
2856 | static char *addenv(struct cgi_env_block *block, const char *fmt, ...) { |
---|
2857 | int n, space; |
---|
2858 | char *added; |
---|
2859 | va_list ap; |
---|
2860 | |
---|
2861 | // Calculate how much space is left in the buffer |
---|
2862 | space = sizeof(block->buf) - block->len - 2; |
---|
2863 | assert(space >= 0); |
---|
2864 | |
---|
2865 | // Make a pointer to the free space int the buffer |
---|
2866 | added = block->buf + block->len; |
---|
2867 | |
---|
2868 | // Copy VARIABLE=VALUE\0 string into the free space |
---|
2869 | va_start(ap, fmt); |
---|
2870 | n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap); |
---|
2871 | va_end(ap); |
---|
2872 | |
---|
2873 | // Make sure we do not overflow buffer and the envp array |
---|
2874 | if (n > 0 && n < space && |
---|
2875 | block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { |
---|
2876 | // Append a pointer to the added string into the envp array |
---|
2877 | block->vars[block->nvars++] = block->buf + block->len; |
---|
2878 | // Bump up used length counter. Include \0 terminator |
---|
2879 | block->len += n + 1; |
---|
2880 | } |
---|
2881 | |
---|
2882 | return added; |
---|
2883 | } |
---|
2884 | |
---|
2885 | static void prepare_cgi_environment(struct mg_connection *conn, |
---|
2886 | const char *prog, |
---|
2887 | struct cgi_env_block *blk) { |
---|
2888 | const char *s, *slash; |
---|
2889 | struct vec var_vec; |
---|
2890 | char *p, src_addr[20]; |
---|
2891 | int i; |
---|
2892 | |
---|
2893 | blk->len = blk->nvars = 0; |
---|
2894 | blk->conn = conn; |
---|
2895 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
2896 | |
---|
2897 | addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]); |
---|
2898 | addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
---|
2899 | addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
---|
2900 | |
---|
2901 | // Prepare the environment block |
---|
2902 | addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); |
---|
2903 | addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); |
---|
2904 | addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP |
---|
2905 | |
---|
2906 | // TODO(lsm): fix this for IPv6 case |
---|
2907 | addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port)); |
---|
2908 | |
---|
2909 | addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method); |
---|
2910 | addenv(blk, "REMOTE_ADDR=%s", src_addr); |
---|
2911 | addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port); |
---|
2912 | addenv(blk, "REQUEST_URI=%s", conn->request_info.uri); |
---|
2913 | |
---|
2914 | // SCRIPT_NAME |
---|
2915 | assert(conn->request_info.uri[0] == '/'); |
---|
2916 | slash = strrchr(conn->request_info.uri, '/'); |
---|
2917 | if ((s = strrchr(prog, '/')) == NULL) |
---|
2918 | s = prog; |
---|
2919 | addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri, |
---|
2920 | conn->request_info.uri, s); |
---|
2921 | |
---|
2922 | addenv(blk, "SCRIPT_FILENAME=%s", prog); |
---|
2923 | addenv(blk, "PATH_TRANSLATED=%s", prog); |
---|
2924 | addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on"); |
---|
2925 | |
---|
2926 | if ((s = mg_get_header(conn, "Content-Type")) != NULL) |
---|
2927 | addenv(blk, "CONTENT_TYPE=%s", s); |
---|
2928 | |
---|
2929 | if (conn->request_info.query_string != NULL) |
---|
2930 | addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string); |
---|
2931 | |
---|
2932 | if ((s = mg_get_header(conn, "Content-Length")) != NULL) |
---|
2933 | addenv(blk, "CONTENT_LENGTH=%s", s); |
---|
2934 | |
---|
2935 | if ((s = getenv("PATH")) != NULL) |
---|
2936 | addenv(blk, "PATH=%s", s); |
---|
2937 | |
---|
2938 | if (conn->path_info != NULL) { |
---|
2939 | addenv(blk, "PATH_INFO=%s", conn->path_info); |
---|
2940 | } |
---|
2941 | |
---|
2942 | #if defined(_WIN32) |
---|
2943 | if ((s = getenv("COMSPEC")) != NULL) { |
---|
2944 | addenv(blk, "COMSPEC=%s", s); |
---|
2945 | } |
---|
2946 | if ((s = getenv("SYSTEMROOT")) != NULL) { |
---|
2947 | addenv(blk, "SYSTEMROOT=%s", s); |
---|
2948 | } |
---|
2949 | if ((s = getenv("SystemDrive")) != NULL) { |
---|
2950 | addenv(blk, "SystemDrive=%s", s); |
---|
2951 | } |
---|
2952 | #else |
---|
2953 | if ((s = getenv("LD_LIBRARY_PATH")) != NULL) |
---|
2954 | addenv(blk, "LD_LIBRARY_PATH=%s", s); |
---|
2955 | #endif // _WIN32 |
---|
2956 | |
---|
2957 | if ((s = getenv("PERLLIB")) != NULL) |
---|
2958 | addenv(blk, "PERLLIB=%s", s); |
---|
2959 | |
---|
2960 | if (conn->request_info.remote_user != NULL) { |
---|
2961 | addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user); |
---|
2962 | addenv(blk, "%s", "AUTH_TYPE=Digest"); |
---|
2963 | } |
---|
2964 | |
---|
2965 | // Add all headers as HTTP_* variables |
---|
2966 | for (i = 0; i < conn->request_info.num_headers; i++) { |
---|
2967 | p = addenv(blk, "HTTP_%s=%s", |
---|
2968 | conn->request_info.http_headers[i].name, |
---|
2969 | conn->request_info.http_headers[i].value); |
---|
2970 | |
---|
2971 | // Convert variable name into uppercase, and change - to _ |
---|
2972 | for (; *p != '=' && *p != '\0'; p++) { |
---|
2973 | if (*p == '-') |
---|
2974 | *p = '_'; |
---|
2975 | *p = (char) toupper(* (unsigned char *) p); |
---|
2976 | } |
---|
2977 | } |
---|
2978 | |
---|
2979 | // Add user-specified variables |
---|
2980 | s = conn->ctx->config[CGI_ENVIRONMENT]; |
---|
2981 | while ((s = next_option(s, &var_vec, NULL)) != NULL) { |
---|
2982 | addenv(blk, "%.*s", var_vec.len, var_vec.ptr); |
---|
2983 | } |
---|
2984 | |
---|
2985 | blk->vars[blk->nvars++] = NULL; |
---|
2986 | blk->buf[blk->len++] = '\0'; |
---|
2987 | |
---|
2988 | assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); |
---|
2989 | assert(blk->len > 0); |
---|
2990 | assert(blk->len < (int) sizeof(blk->buf)); |
---|
2991 | } |
---|
2992 | |
---|
2993 | static void handle_cgi_request(struct mg_connection *conn, const char *prog) { |
---|
2994 | int headers_len, data_len, i, fd_stdin[2], fd_stdout[2]; |
---|
2995 | const char *status, *status_text; |
---|
2996 | char buf[16384], *pbuf, dir[PATH_MAX], *p; |
---|
2997 | struct mg_request_info ri; |
---|
2998 | struct cgi_env_block blk; |
---|
2999 | FILE *in, *out; |
---|
3000 | pid_t pid; |
---|
3001 | |
---|
3002 | prepare_cgi_environment(conn, prog, &blk); |
---|
3003 | |
---|
3004 | // CGI must be executed in its own directory. 'dir' must point to the |
---|
3005 | // directory containing executable program, 'p' must point to the |
---|
3006 | // executable program name relative to 'dir'. |
---|
3007 | (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog); |
---|
3008 | if ((p = strrchr(dir, DIRSEP)) != NULL) { |
---|
3009 | *p++ = '\0'; |
---|
3010 | } else { |
---|
3011 | dir[0] = '.', dir[1] = '\0'; |
---|
3012 | p = (char *) prog; |
---|
3013 | } |
---|
3014 | |
---|
3015 | pid = (pid_t) -1; |
---|
3016 | fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1; |
---|
3017 | in = out = NULL; |
---|
3018 | |
---|
3019 | if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) { |
---|
3020 | send_http_error(conn, 500, http_500_error, |
---|
3021 | "Cannot create CGI pipe: %s", strerror(ERRNO)); |
---|
3022 | goto done; |
---|
3023 | } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars, |
---|
3024 | fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) { |
---|
3025 | goto done; |
---|
3026 | } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL || |
---|
3027 | (out = fdopen(fd_stdout[0], "rb")) == NULL) { |
---|
3028 | send_http_error(conn, 500, http_500_error, |
---|
3029 | "fopen: %s", strerror(ERRNO)); |
---|
3030 | goto done; |
---|
3031 | } |
---|
3032 | |
---|
3033 | setbuf(in, NULL); |
---|
3034 | setbuf(out, NULL); |
---|
3035 | |
---|
3036 | // spawn_process() must close those! |
---|
3037 | // If we don't mark them as closed, close() attempt before |
---|
3038 | // return from this function throws an exception on Windows. |
---|
3039 | // Windows does not like when closed descriptor is closed again. |
---|
3040 | fd_stdin[0] = fd_stdout[1] = -1; |
---|
3041 | |
---|
3042 | // Send POST data to the CGI process if needed |
---|
3043 | if (!strcmp(conn->request_info.request_method, "POST") && |
---|
3044 | !forward_body_data(conn, in, INVALID_SOCKET, NULL)) { |
---|
3045 | goto done; |
---|
3046 | } |
---|
3047 | |
---|
3048 | // Now read CGI reply into a buffer. We need to set correct |
---|
3049 | // status code, thus we need to see all HTTP headers first. |
---|
3050 | // Do not send anything back to client, until we buffer in all |
---|
3051 | // HTTP headers. |
---|
3052 | data_len = 0; |
---|
3053 | headers_len = read_request(out, INVALID_SOCKET, NULL, |
---|
3054 | buf, sizeof(buf), &data_len); |
---|
3055 | if (headers_len <= 0) { |
---|
3056 | send_http_error(conn, 500, http_500_error, |
---|
3057 | "CGI program sent malformed HTTP headers: [%.*s]", |
---|
3058 | data_len, buf); |
---|
3059 | goto done; |
---|
3060 | } |
---|
3061 | pbuf = buf; |
---|
3062 | buf[headers_len - 1] = '\0'; |
---|
3063 | parse_http_headers(&pbuf, &ri); |
---|
3064 | |
---|
3065 | // Make up and send the status line |
---|
3066 | status_text = "OK"; |
---|
3067 | if ((status = get_header(&ri, "Status")) != NULL) { |
---|
3068 | conn->request_info.status_code = atoi(status); |
---|
3069 | status_text = status; |
---|
3070 | while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') { |
---|
3071 | status_text++; |
---|
3072 | } |
---|
3073 | } else if (get_header(&ri, "Location") != NULL) { |
---|
3074 | conn->request_info.status_code = 302; |
---|
3075 | } else { |
---|
3076 | conn->request_info.status_code = 200; |
---|
3077 | } |
---|
3078 | if (get_header(&ri, "Connection") != NULL && |
---|
3079 | !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) { |
---|
3080 | conn->must_close = 1; |
---|
3081 | } |
---|
3082 | (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->request_info.status_code, |
---|
3083 | status_text); |
---|
3084 | |
---|
3085 | // Send headers |
---|
3086 | for (i = 0; i < ri.num_headers; i++) { |
---|
3087 | mg_printf(conn, "%s: %s\r\n", |
---|
3088 | ri.http_headers[i].name, ri.http_headers[i].value); |
---|
3089 | } |
---|
3090 | (void) mg_write(conn, "\r\n", 2); |
---|
3091 | |
---|
3092 | // Send chunk of data that may be read after the headers |
---|
3093 | conn->num_bytes_sent += mg_write(conn, buf + headers_len, |
---|
3094 | (size_t)(data_len - headers_len)); |
---|
3095 | |
---|
3096 | // Read the rest of CGI output and send to the client |
---|
3097 | send_file_data(conn, out, INT64_MAX); |
---|
3098 | |
---|
3099 | done: |
---|
3100 | if (pid != (pid_t) -1) { |
---|
3101 | kill(pid, SIGKILL); |
---|
3102 | } |
---|
3103 | if (fd_stdin[0] != -1) { |
---|
3104 | (void) close(fd_stdin[0]); |
---|
3105 | } |
---|
3106 | if (fd_stdout[1] != -1) { |
---|
3107 | (void) close(fd_stdout[1]); |
---|
3108 | } |
---|
3109 | |
---|
3110 | if (in != NULL) { |
---|
3111 | (void) fclose(in); |
---|
3112 | } else if (fd_stdin[1] != -1) { |
---|
3113 | (void) close(fd_stdin[1]); |
---|
3114 | } |
---|
3115 | |
---|
3116 | if (out != NULL) { |
---|
3117 | (void) fclose(out); |
---|
3118 | } else if (fd_stdout[0] != -1) { |
---|
3119 | (void) close(fd_stdout[0]); |
---|
3120 | } |
---|
3121 | } |
---|
3122 | #endif // !NO_CGI |
---|
3123 | |
---|
3124 | // For a given PUT path, create all intermediate subdirectories |
---|
3125 | // for given path. Return 0 if the path itself is a directory, |
---|
3126 | // or -1 on error, 1 if OK. |
---|
3127 | static int put_dir(const char *path) { |
---|
3128 | char buf[PATH_MAX]; |
---|
3129 | const char *s, *p; |
---|
3130 | struct mgstat st; |
---|
3131 | int len, res = 1; |
---|
3132 | |
---|
3133 | for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) { |
---|
3134 | len = p - path; |
---|
3135 | if (len >= (int) sizeof(buf)) { |
---|
3136 | res = -1; |
---|
3137 | break; |
---|
3138 | } |
---|
3139 | memcpy(buf, path, len); |
---|
3140 | buf[len] = '\0'; |
---|
3141 | |
---|
3142 | // Try to create intermediate directory |
---|
3143 | DEBUG_TRACE(("mkdir(%s)", buf)); |
---|
3144 | if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) { |
---|
3145 | res = -1; |
---|
3146 | break; |
---|
3147 | } |
---|
3148 | |
---|
3149 | // Is path itself a directory? |
---|
3150 | if (p[1] == '\0') { |
---|
3151 | res = 0; |
---|
3152 | } |
---|
3153 | } |
---|
3154 | |
---|
3155 | return res; |
---|
3156 | } |
---|
3157 | |
---|
3158 | static void put_file(struct mg_connection *conn, const char *path) { |
---|
3159 | struct mgstat st; |
---|
3160 | const char *range; |
---|
3161 | int64_t r1, r2; |
---|
3162 | FILE *fp; |
---|
3163 | int rc; |
---|
3164 | |
---|
3165 | conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201; |
---|
3166 | |
---|
3167 | if ((rc = put_dir(path)) == 0) { |
---|
3168 | mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code); |
---|
3169 | } else if (rc == -1) { |
---|
3170 | send_http_error(conn, 500, http_500_error, |
---|
3171 | "put_dir(%s): %s", path, strerror(ERRNO)); |
---|
3172 | } else if ((fp = mg_fopen(path, "wb+")) == NULL) { |
---|
3173 | send_http_error(conn, 500, http_500_error, |
---|
3174 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
3175 | } else { |
---|
3176 | set_close_on_exec(fileno(fp)); |
---|
3177 | range = mg_get_header(conn, "Content-Range"); |
---|
3178 | r1 = r2 = 0; |
---|
3179 | if (range != NULL && parse_range_header(range, &r1, &r2) > 0) { |
---|
3180 | conn->request_info.status_code = 206; |
---|
3181 | // TODO(lsm): handle seek error |
---|
3182 | (void) fseeko(fp, (off_t) r1, SEEK_SET); |
---|
3183 | } |
---|
3184 | if (forward_body_data(conn, fp, INVALID_SOCKET, NULL)) |
---|
3185 | (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", |
---|
3186 | conn->request_info.status_code); |
---|
3187 | (void) fclose(fp); |
---|
3188 | } |
---|
3189 | } |
---|
3190 | |
---|
3191 | static void send_ssi_file(struct mg_connection *, const char *, FILE *, int); |
---|
3192 | |
---|
3193 | static void do_ssi_include(struct mg_connection *conn, const char *ssi, |
---|
3194 | char *tag, int include_level) { |
---|
3195 | char file_name[BUFSIZ], path[PATH_MAX], *p; |
---|
3196 | FILE *fp; |
---|
3197 | |
---|
3198 | // sscanf() is safe here, since send_ssi_file() also uses buffer |
---|
3199 | // of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ. |
---|
3200 | if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { |
---|
3201 | // File name is relative to the webserver root |
---|
3202 | (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
---|
3203 | conn->ctx->config[DOCUMENT_ROOT], DIRSEP, file_name); |
---|
3204 | } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) { |
---|
3205 | // File name is relative to the webserver working directory |
---|
3206 | // or it is absolute system path |
---|
3207 | (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name); |
---|
3208 | } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) { |
---|
3209 | // File name is relative to the currect document |
---|
3210 | (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi); |
---|
3211 | if ((p = strrchr(path, DIRSEP)) != NULL) { |
---|
3212 | p[1] = '\0'; |
---|
3213 | } |
---|
3214 | (void) mg_snprintf(conn, path + strlen(path), |
---|
3215 | sizeof(path) - strlen(path), "%s", file_name); |
---|
3216 | } else { |
---|
3217 | cry(conn, "Bad SSI #include: [%s]", tag); |
---|
3218 | return; |
---|
3219 | } |
---|
3220 | |
---|
3221 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
3222 | cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", |
---|
3223 | tag, path, strerror(ERRNO)); |
---|
3224 | } else { |
---|
3225 | set_close_on_exec(fileno(fp)); |
---|
3226 | if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
---|
3227 | strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) { |
---|
3228 | send_ssi_file(conn, path, fp, include_level + 1); |
---|
3229 | } else { |
---|
3230 | send_file_data(conn, fp, INT64_MAX); |
---|
3231 | } |
---|
3232 | (void) fclose(fp); |
---|
3233 | } |
---|
3234 | } |
---|
3235 | |
---|
3236 | #if !defined(NO_POPEN) |
---|
3237 | static void do_ssi_exec(struct mg_connection *conn, char *tag) { |
---|
3238 | char cmd[BUFSIZ]; |
---|
3239 | FILE *fp; |
---|
3240 | |
---|
3241 | if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { |
---|
3242 | cry(conn, "Bad SSI #exec: [%s]", tag); |
---|
3243 | } else if ((fp = popen(cmd, "r")) == NULL) { |
---|
3244 | cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO)); |
---|
3245 | } else { |
---|
3246 | send_file_data(conn, fp, INT64_MAX); |
---|
3247 | (void) pclose(fp); |
---|
3248 | } |
---|
3249 | } |
---|
3250 | #endif // !NO_POPEN |
---|
3251 | |
---|
3252 | static void send_ssi_file(struct mg_connection *conn, const char *path, |
---|
3253 | FILE *fp, int include_level) { |
---|
3254 | char buf[BUFSIZ]; |
---|
3255 | int ch, len, in_ssi_tag; |
---|
3256 | |
---|
3257 | if (include_level > 10) { |
---|
3258 | cry(conn, "SSI #include level is too deep (%s)", path); |
---|
3259 | return; |
---|
3260 | } |
---|
3261 | |
---|
3262 | in_ssi_tag = 0; |
---|
3263 | len = 0; |
---|
3264 | |
---|
3265 | while ((ch = fgetc(fp)) != EOF) { |
---|
3266 | if (in_ssi_tag && ch == '>') { |
---|
3267 | in_ssi_tag = 0; |
---|
3268 | buf[len++] = (char) ch; |
---|
3269 | buf[len] = '\0'; |
---|
3270 | assert(len <= (int) sizeof(buf)); |
---|
3271 | if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { |
---|
3272 | // Not an SSI tag, pass it |
---|
3273 | (void) mg_write(conn, buf, (size_t)len); |
---|
3274 | } else { |
---|
3275 | if (!memcmp(buf + 5, "include", 7)) { |
---|
3276 | do_ssi_include(conn, path, buf + 12, include_level); |
---|
3277 | #if !defined(NO_POPEN) |
---|
3278 | } else if (!memcmp(buf + 5, "exec", 4)) { |
---|
3279 | do_ssi_exec(conn, buf + 9); |
---|
3280 | #endif // !NO_POPEN |
---|
3281 | } else { |
---|
3282 | cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf); |
---|
3283 | } |
---|
3284 | } |
---|
3285 | len = 0; |
---|
3286 | } else if (in_ssi_tag) { |
---|
3287 | if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { |
---|
3288 | // Not an SSI tag |
---|
3289 | in_ssi_tag = 0; |
---|
3290 | } else if (len == (int) sizeof(buf) - 2) { |
---|
3291 | cry(conn, "%s: SSI tag is too large", path); |
---|
3292 | len = 0; |
---|
3293 | } |
---|
3294 | buf[len++] = ch & 0xff; |
---|
3295 | } else if (ch == '<') { |
---|
3296 | in_ssi_tag = 1; |
---|
3297 | if (len > 0) { |
---|
3298 | (void) mg_write(conn, buf, (size_t)len); |
---|
3299 | } |
---|
3300 | len = 0; |
---|
3301 | buf[len++] = ch & 0xff; |
---|
3302 | } else { |
---|
3303 | buf[len++] = ch & 0xff; |
---|
3304 | if (len == (int) sizeof(buf)) { |
---|
3305 | (void) mg_write(conn, buf, (size_t)len); |
---|
3306 | len = 0; |
---|
3307 | } |
---|
3308 | } |
---|
3309 | } |
---|
3310 | |
---|
3311 | // Send the rest of buffered data |
---|
3312 | if (len > 0) { |
---|
3313 | (void) mg_write(conn, buf, (size_t)len); |
---|
3314 | } |
---|
3315 | } |
---|
3316 | |
---|
3317 | static void handle_ssi_file_request(struct mg_connection *conn, |
---|
3318 | const char *path) { |
---|
3319 | FILE *fp; |
---|
3320 | |
---|
3321 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
3322 | send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path, |
---|
3323 | strerror(ERRNO)); |
---|
3324 | } else { |
---|
3325 | conn->must_close = 1; |
---|
3326 | set_close_on_exec(fileno(fp)); |
---|
3327 | mg_printf(conn, "HTTP/1.1 200 OK\r\n" |
---|
3328 | "Content-Type: text/html\r\nConnection: %s\r\n\r\n", |
---|
3329 | suggest_connection_header(conn)); |
---|
3330 | send_ssi_file(conn, path, fp, 0); |
---|
3331 | (void) fclose(fp); |
---|
3332 | } |
---|
3333 | } |
---|
3334 | |
---|
3335 | static void send_options(struct mg_connection *conn) { |
---|
3336 | conn->request_info.status_code = 200; |
---|
3337 | |
---|
3338 | (void) mg_printf(conn, |
---|
3339 | "HTTP/1.1 200 OK\r\n" |
---|
3340 | "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n" |
---|
3341 | "DAV: 1\r\n\r\n"); |
---|
3342 | } |
---|
3343 | |
---|
3344 | // Writes PROPFIND properties for a collection element |
---|
3345 | static void print_props(struct mg_connection *conn, const char* uri, |
---|
3346 | struct mgstat* st) { |
---|
3347 | char mtime[64]; |
---|
3348 | gmt_time_string(mtime, sizeof(mtime), &st->mtime); |
---|
3349 | conn->num_bytes_sent += mg_printf(conn, |
---|
3350 | "<d:response>" |
---|
3351 | "<d:href>%s</d:href>" |
---|
3352 | "<d:propstat>" |
---|
3353 | "<d:prop>" |
---|
3354 | "<d:resourcetype>%s</d:resourcetype>" |
---|
3355 | "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>" |
---|
3356 | "<d:getlastmodified>%s</d:getlastmodified>" |
---|
3357 | "</d:prop>" |
---|
3358 | "<d:status>HTTP/1.1 200 OK</d:status>" |
---|
3359 | "</d:propstat>" |
---|
3360 | "</d:response>\n", |
---|
3361 | uri, |
---|
3362 | st->is_directory ? "<d:collection/>" : "", |
---|
3363 | st->size, |
---|
3364 | mtime); |
---|
3365 | } |
---|
3366 | |
---|
3367 | static void print_dav_dir_entry(struct de *de, void *data) { |
---|
3368 | char href[PATH_MAX]; |
---|
3369 | struct mg_connection *conn = (struct mg_connection *) data; |
---|
3370 | mg_snprintf(conn, href, sizeof(href), "%s%s", |
---|
3371 | conn->request_info.uri, de->file_name); |
---|
3372 | print_props(conn, href, &de->st); |
---|
3373 | } |
---|
3374 | |
---|
3375 | static void handle_propfind(struct mg_connection *conn, const char* path, |
---|
3376 | struct mgstat* st) { |
---|
3377 | const char *depth = mg_get_header(conn, "Depth"); |
---|
3378 | |
---|
3379 | conn->must_close = 1; |
---|
3380 | conn->request_info.status_code = 207; |
---|
3381 | mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n" |
---|
3382 | "Connection: close\r\n" |
---|
3383 | "Content-Type: text/xml; charset=utf-8\r\n\r\n"); |
---|
3384 | |
---|
3385 | conn->num_bytes_sent += mg_printf(conn, |
---|
3386 | "<?xml version=\"1.0\" encoding=\"utf-8\"?>" |
---|
3387 | "<d:multistatus xmlns:d='DAV:'>\n"); |
---|
3388 | |
---|
3389 | // Print properties for the requested resource itself |
---|
3390 | print_props(conn, conn->request_info.uri, st); |
---|
3391 | |
---|
3392 | // If it is a directory, print directory entries too if Depth is not 0 |
---|
3393 | if (st->is_directory && |
---|
3394 | !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") && |
---|
3395 | (depth == NULL || strcmp(depth, "0") != 0)) { |
---|
3396 | scan_directory(conn, path, conn, &print_dav_dir_entry); |
---|
3397 | } |
---|
3398 | |
---|
3399 | conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>"); |
---|
3400 | } |
---|
3401 | |
---|
3402 | // This is the heart of the Mongoose's logic. |
---|
3403 | // This function is called when the request is read, parsed and validated, |
---|
3404 | // and Mongoose must decide what action to take: serve a file, or |
---|
3405 | // a directory, or call embedded function, etcetera. |
---|
3406 | static void handle_request(struct mg_connection *conn) { |
---|
3407 | struct mg_request_info *ri = &conn->request_info; |
---|
3408 | char path[PATH_MAX]; |
---|
3409 | int stat_result, uri_len; |
---|
3410 | struct mgstat st; |
---|
3411 | |
---|
3412 | if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) { |
---|
3413 | * conn->request_info.query_string++ = '\0'; |
---|
3414 | } |
---|
3415 | uri_len = strlen(ri->uri); |
---|
3416 | url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0); |
---|
3417 | remove_double_dots_and_double_slashes(ri->uri); |
---|
3418 | stat_result = convert_uri_to_file_name(conn, path, sizeof(path), &st); |
---|
3419 | |
---|
3420 | DEBUG_TRACE(("%s", ri->uri)); |
---|
3421 | if (!check_authorization(conn, path)) { |
---|
3422 | send_authorization_request(conn); |
---|
3423 | } else if (call_user(conn, MG_NEW_REQUEST) != NULL) { |
---|
3424 | // Do nothing, callback has served the request |
---|
3425 | } else if (!strcmp(ri->request_method, "OPTIONS")) { |
---|
3426 | send_options(conn); |
---|
3427 | } else if (strstr(path, PASSWORDS_FILE_NAME)) { |
---|
3428 | // Do not allow to view passwords files |
---|
3429 | send_http_error(conn, 403, "Forbidden", "Access Forbidden"); |
---|
3430 | } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) { |
---|
3431 | send_http_error(conn, 404, "Not Found", "Not Found"); |
---|
3432 | } else if ((!strcmp(ri->request_method, "PUT") || |
---|
3433 | !strcmp(ri->request_method, "DELETE")) && |
---|
3434 | (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL || |
---|
3435 | !is_authorized_for_put(conn))) { |
---|
3436 | send_authorization_request(conn); |
---|
3437 | } else if (!strcmp(ri->request_method, "PUT")) { |
---|
3438 | put_file(conn, path); |
---|
3439 | } else if (!strcmp(ri->request_method, "DELETE")) { |
---|
3440 | if (mg_remove(path) == 0) { |
---|
3441 | send_http_error(conn, 200, "OK", ""); |
---|
3442 | } else { |
---|
3443 | send_http_error(conn, 500, http_500_error, "remove(%s): %s", path, |
---|
3444 | strerror(ERRNO)); |
---|
3445 | } |
---|
3446 | } else if (stat_result != 0) { |
---|
3447 | send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
3448 | } else if (st.is_directory && ri->uri[uri_len - 1] != '/') { |
---|
3449 | (void) mg_printf(conn, |
---|
3450 | "HTTP/1.1 301 Moved Permanently\r\n" |
---|
3451 | "Location: %s/\r\n\r\n", ri->uri); |
---|
3452 | } else if (!strcmp(ri->request_method, "PROPFIND")) { |
---|
3453 | handle_propfind(conn, path, &st); |
---|
3454 | } else if (st.is_directory && |
---|
3455 | !substitute_index_file(conn, path, sizeof(path), &st)) { |
---|
3456 | if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) { |
---|
3457 | handle_directory_request(conn, path); |
---|
3458 | } else { |
---|
3459 | send_http_error(conn, 403, "Directory Listing Denied", |
---|
3460 | "Directory listing denied"); |
---|
3461 | } |
---|
3462 | #if !defined(NO_CGI) |
---|
3463 | } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
---|
3464 | strlen(conn->ctx->config[CGI_EXTENSIONS]), |
---|
3465 | path) > 0) { |
---|
3466 | if (strcmp(ri->request_method, "POST") && |
---|
3467 | strcmp(ri->request_method, "GET")) { |
---|
3468 | send_http_error(conn, 501, "Not Implemented", |
---|
3469 | "Method %s is not implemented", ri->request_method); |
---|
3470 | } else { |
---|
3471 | handle_cgi_request(conn, path); |
---|
3472 | } |
---|
3473 | #endif // !NO_CGI |
---|
3474 | } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
---|
3475 | strlen(conn->ctx->config[SSI_EXTENSIONS]), |
---|
3476 | path) > 0) { |
---|
3477 | handle_ssi_file_request(conn, path); |
---|
3478 | } else if (is_not_modified(conn, &st)) { |
---|
3479 | send_http_error(conn, 304, "Not Modified", ""); |
---|
3480 | } else { |
---|
3481 | handle_file_request(conn, path, &st); |
---|
3482 | } |
---|
3483 | } |
---|
3484 | |
---|
3485 | static void close_all_listening_sockets(struct mg_context *ctx) { |
---|
3486 | struct socket *sp, *tmp; |
---|
3487 | for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) { |
---|
3488 | tmp = sp->next; |
---|
3489 | (void) closesocket(sp->sock); |
---|
3490 | free(sp); |
---|
3491 | } |
---|
3492 | } |
---|
3493 | |
---|
3494 | // Valid listening port specification is: [ip_address:]port[s] |
---|
3495 | // Examples: 80, 443s, 127.0.0.1:3128,1.2.3.4:8080s |
---|
3496 | // TODO(lsm): add parsing of the IPv6 address |
---|
3497 | static int parse_port_string(const struct vec *vec, struct socket *so) { |
---|
3498 | int a, b, c, d, port, len; |
---|
3499 | |
---|
3500 | // MacOS needs that. If we do not zero it, subsequent bind() will fail. |
---|
3501 | // Also, all-zeroes in the socket address means binding to all addresses |
---|
3502 | // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). |
---|
3503 | memset(so, 0, sizeof(*so)); |
---|
3504 | |
---|
3505 | if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) { |
---|
3506 | // Bind to a specific IPv4 address |
---|
3507 | so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); |
---|
3508 | } else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 || |
---|
3509 | len <= 0 || |
---|
3510 | len > (int) vec->len || |
---|
3511 | (vec->ptr[len] && vec->ptr[len] != 's' && vec->ptr[len] != ',')) { |
---|
3512 | return 0; |
---|
3513 | } |
---|
3514 | |
---|
3515 | so->is_ssl = vec->ptr[len] == 's'; |
---|
3516 | #if defined(USE_IPV6) |
---|
3517 | so->lsa.sin6.sin6_family = AF_INET6; |
---|
3518 | so->lsa.sin6.sin6_port = htons((uint16_t) port); |
---|
3519 | #else |
---|
3520 | so->lsa.sin.sin_family = AF_INET; |
---|
3521 | so->lsa.sin.sin_port = htons((uint16_t) port); |
---|
3522 | #endif |
---|
3523 | |
---|
3524 | return 1; |
---|
3525 | } |
---|
3526 | |
---|
3527 | static int set_ports_option(struct mg_context *ctx) { |
---|
3528 | const char *list = ctx->config[LISTENING_PORTS]; |
---|
3529 | int on = 1, success = 1; |
---|
3530 | SOCKET sock; |
---|
3531 | struct vec vec; |
---|
3532 | struct socket so, *listener; |
---|
3533 | |
---|
3534 | while (success && (list = next_option(list, &vec, NULL)) != NULL) { |
---|
3535 | if (!parse_port_string(&vec, &so)) { |
---|
3536 | cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s", |
---|
3537 | __func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]"); |
---|
3538 | success = 0; |
---|
3539 | } else if (so.is_ssl && ctx->ssl_ctx == NULL) { |
---|
3540 | cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?"); |
---|
3541 | success = 0; |
---|
3542 | } else if ((sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) == |
---|
3543 | INVALID_SOCKET || |
---|
3544 | #if !defined(_WIN32) |
---|
3545 | // On Windows, SO_REUSEADDR is recommended only for |
---|
3546 | // broadcast UDP sockets |
---|
3547 | setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, |
---|
3548 | sizeof(on)) != 0 || |
---|
3549 | #endif // !_WIN32 |
---|
3550 | // Set TCP keep-alive. This is needed because if HTTP-level |
---|
3551 | // keep-alive is enabled, and client resets the connection, |
---|
3552 | // server won't get TCP FIN or RST and will keep the connection |
---|
3553 | // open forever. With TCP keep-alive, next keep-alive |
---|
3554 | // handshake will figure out that the client is down and |
---|
3555 | // will close the server end. |
---|
3556 | // Thanks to Igor Klopov who suggested the patch. |
---|
3557 | setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on, |
---|
3558 | sizeof(on)) != 0 || |
---|
3559 | bind(sock, &so.lsa.sa, sizeof(so.lsa)) != 0 || |
---|
3560 | listen(sock, 100) != 0) { |
---|
3561 | closesocket(sock); |
---|
3562 | cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__, |
---|
3563 | vec.len, vec.ptr, strerror(ERRNO)); |
---|
3564 | success = 0; |
---|
3565 | } else if ((listener = (struct socket *) |
---|
3566 | calloc(1, sizeof(*listener))) == NULL) { |
---|
3567 | closesocket(sock); |
---|
3568 | cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO)); |
---|
3569 | success = 0; |
---|
3570 | } else { |
---|
3571 | *listener = so; |
---|
3572 | listener->sock = sock; |
---|
3573 | set_close_on_exec(listener->sock); |
---|
3574 | listener->next = ctx->listening_sockets; |
---|
3575 | ctx->listening_sockets = listener; |
---|
3576 | } |
---|
3577 | } |
---|
3578 | |
---|
3579 | if (!success) { |
---|
3580 | close_all_listening_sockets(ctx); |
---|
3581 | } |
---|
3582 | |
---|
3583 | return success; |
---|
3584 | } |
---|
3585 | |
---|
3586 | static void log_header(const struct mg_connection *conn, const char *header, |
---|
3587 | FILE *fp) { |
---|
3588 | const char *header_value; |
---|
3589 | |
---|
3590 | if ((header_value = mg_get_header(conn, header)) == NULL) { |
---|
3591 | (void) fprintf(fp, "%s", " -"); |
---|
3592 | } else { |
---|
3593 | (void) fprintf(fp, " \"%s\"", header_value); |
---|
3594 | } |
---|
3595 | } |
---|
3596 | |
---|
3597 | static void log_access(const struct mg_connection *conn) { |
---|
3598 | const struct mg_request_info *ri; |
---|
3599 | FILE *fp; |
---|
3600 | char date[64], src_addr[20]; |
---|
3601 | |
---|
3602 | fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL : |
---|
3603 | mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+"); |
---|
3604 | |
---|
3605 | if (fp == NULL) |
---|
3606 | return; |
---|
3607 | |
---|
3608 | strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", |
---|
3609 | localtime(&conn->birth_time)); |
---|
3610 | |
---|
3611 | ri = &conn->request_info; |
---|
3612 | flockfile(fp); |
---|
3613 | |
---|
3614 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
3615 | fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT, |
---|
3616 | src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date, |
---|
3617 | ri->request_method ? ri->request_method : "-", |
---|
3618 | ri->uri ? ri->uri : "-", ri->http_version, |
---|
3619 | conn->request_info.status_code, conn->num_bytes_sent); |
---|
3620 | log_header(conn, "Referer", fp); |
---|
3621 | log_header(conn, "User-Agent", fp); |
---|
3622 | fputc('\n', fp); |
---|
3623 | fflush(fp); |
---|
3624 | |
---|
3625 | funlockfile(fp); |
---|
3626 | fclose(fp); |
---|
3627 | } |
---|
3628 | |
---|
3629 | static int isbyte(int n) { |
---|
3630 | return n >= 0 && n <= 255; |
---|
3631 | } |
---|
3632 | |
---|
3633 | // Verify given socket address against the ACL. |
---|
3634 | // Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. |
---|
3635 | static int check_acl(struct mg_context *ctx, const union usa *usa) { |
---|
3636 | int a, b, c, d, n, mask, allowed; |
---|
3637 | char flag; |
---|
3638 | uint32_t acl_subnet, acl_mask, remote_ip; |
---|
3639 | struct vec vec; |
---|
3640 | const char *list = ctx->config[ACCESS_CONTROL_LIST]; |
---|
3641 | |
---|
3642 | if (list == NULL) { |
---|
3643 | return 1; |
---|
3644 | } |
---|
3645 | |
---|
3646 | (void) memcpy(&remote_ip, &usa->sin.sin_addr, sizeof(remote_ip)); |
---|
3647 | |
---|
3648 | // If any ACL is set, deny by default |
---|
3649 | allowed = '-'; |
---|
3650 | |
---|
3651 | while ((list = next_option(list, &vec, NULL)) != NULL) { |
---|
3652 | mask = 32; |
---|
3653 | |
---|
3654 | if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) { |
---|
3655 | cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); |
---|
3656 | return -1; |
---|
3657 | } else if (flag != '+' && flag != '-') { |
---|
3658 | cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr); |
---|
3659 | return -1; |
---|
3660 | } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) { |
---|
3661 | cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr); |
---|
3662 | return -1; |
---|
3663 | } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) { |
---|
3664 | // Do nothing, no mask specified |
---|
3665 | } else if (mask < 0 || mask > 32) { |
---|
3666 | cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr); |
---|
3667 | return -1; |
---|
3668 | } |
---|
3669 | |
---|
3670 | acl_subnet = (a << 24) | (b << 16) | (c << 8) | d; |
---|
3671 | acl_mask = mask ? 0xffffffffU << (32 - mask) : 0; |
---|
3672 | |
---|
3673 | if (acl_subnet == (ntohl(remote_ip) & acl_mask)) { |
---|
3674 | allowed = flag; |
---|
3675 | } |
---|
3676 | } |
---|
3677 | |
---|
3678 | return allowed == '+'; |
---|
3679 | } |
---|
3680 | |
---|
3681 | static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) { |
---|
3682 | FD_SET(fd, set); |
---|
3683 | if (fd > (SOCKET) *max_fd) { |
---|
3684 | *max_fd = (int) fd; |
---|
3685 | } |
---|
3686 | } |
---|
3687 | |
---|
3688 | #if !defined(_WIN32) |
---|
3689 | static int set_uid_option(struct mg_context *ctx) { |
---|
3690 | struct passwd *pw; |
---|
3691 | const char *uid = ctx->config[RUN_AS_USER]; |
---|
3692 | int success = 0; |
---|
3693 | |
---|
3694 | if (uid == NULL) { |
---|
3695 | success = 1; |
---|
3696 | } else { |
---|
3697 | if ((pw = getpwnam(uid)) == NULL) { |
---|
3698 | cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); |
---|
3699 | } else if (setgid(pw->pw_gid) == -1) { |
---|
3700 | cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno)); |
---|
3701 | } else if (setuid(pw->pw_uid) == -1) { |
---|
3702 | cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno)); |
---|
3703 | } else { |
---|
3704 | success = 1; |
---|
3705 | } |
---|
3706 | } |
---|
3707 | |
---|
3708 | return success; |
---|
3709 | } |
---|
3710 | #endif // !_WIN32 |
---|
3711 | |
---|
3712 | #if !defined(NO_SSL) |
---|
3713 | static pthread_mutex_t *ssl_mutexes; |
---|
3714 | |
---|
3715 | // Return OpenSSL error message |
---|
3716 | static const char *ssl_error(void) { |
---|
3717 | unsigned long err; |
---|
3718 | err = ERR_get_error(); |
---|
3719 | return err == 0 ? "" : ERR_error_string(err, NULL); |
---|
3720 | } |
---|
3721 | |
---|
3722 | static void ssl_locking_callback(int mode, int mutex_num, const char *file, |
---|
3723 | int line) { |
---|
3724 | line = 0; // Unused |
---|
3725 | file = NULL; // Unused |
---|
3726 | |
---|
3727 | if (mode & CRYPTO_LOCK) { |
---|
3728 | (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]); |
---|
3729 | } else { |
---|
3730 | (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]); |
---|
3731 | } |
---|
3732 | } |
---|
3733 | |
---|
3734 | static unsigned long ssl_id_callback(void) { |
---|
3735 | return (unsigned long) pthread_self(); |
---|
3736 | } |
---|
3737 | |
---|
3738 | #if !defined(NO_SSL_DL) |
---|
3739 | static int load_dll(struct mg_context *ctx, const char *dll_name, |
---|
3740 | struct ssl_func *sw) { |
---|
3741 | union {void *p; void (*fp)(void);} u; |
---|
3742 | void *dll_handle; |
---|
3743 | struct ssl_func *fp; |
---|
3744 | |
---|
3745 | if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) { |
---|
3746 | cry(fc(ctx), "%s: cannot load %s", __func__, dll_name); |
---|
3747 | return 0; |
---|
3748 | } |
---|
3749 | |
---|
3750 | for (fp = sw; fp->name != NULL; fp++) { |
---|
3751 | #ifdef _WIN32 |
---|
3752 | // GetProcAddress() returns pointer to function |
---|
3753 | u.fp = (void (*)(void)) dlsym(dll_handle, fp->name); |
---|
3754 | #else |
---|
3755 | // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to |
---|
3756 | // function pointers. We need to use a union to make a cast. |
---|
3757 | u.p = dlsym(dll_handle, fp->name); |
---|
3758 | #endif // _WIN32 |
---|
3759 | if (u.fp == NULL) { |
---|
3760 | cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name); |
---|
3761 | return 0; |
---|
3762 | } else { |
---|
3763 | fp->ptr = u.fp; |
---|
3764 | } |
---|
3765 | } |
---|
3766 | |
---|
3767 | return 1; |
---|
3768 | } |
---|
3769 | #endif // NO_SSL_DL |
---|
3770 | |
---|
3771 | // Dynamically load SSL library. Set up ctx->ssl_ctx pointer. |
---|
3772 | static int set_ssl_option(struct mg_context *ctx) { |
---|
3773 | struct mg_request_info request_info; |
---|
3774 | SSL_CTX *CTX; |
---|
3775 | int i, size; |
---|
3776 | const char *pem = ctx->config[SSL_CERTIFICATE]; |
---|
3777 | const char *chain = ctx->config[SSL_CHAIN_FILE]; |
---|
3778 | |
---|
3779 | if (pem == NULL) { |
---|
3780 | return 1; |
---|
3781 | } |
---|
3782 | |
---|
3783 | #if !defined(NO_SSL_DL) |
---|
3784 | if (!load_dll(ctx, SSL_LIB, ssl_sw) || |
---|
3785 | !load_dll(ctx, CRYPTO_LIB, crypto_sw)) { |
---|
3786 | return 0; |
---|
3787 | } |
---|
3788 | #endif // NO_SSL_DL |
---|
3789 | |
---|
3790 | // Initialize SSL crap |
---|
3791 | SSL_library_init(); |
---|
3792 | SSL_load_error_strings(); |
---|
3793 | |
---|
3794 | if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) { |
---|
3795 | cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error()); |
---|
3796 | } else if (ctx->user_callback != NULL) { |
---|
3797 | memset(&request_info, 0, sizeof(request_info)); |
---|
3798 | request_info.user_data = ctx->user_data; |
---|
3799 | ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX, |
---|
3800 | &request_info); |
---|
3801 | } |
---|
3802 | |
---|
3803 | if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem, |
---|
3804 | SSL_FILETYPE_PEM) == 0) { |
---|
3805 | cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error()); |
---|
3806 | return 0; |
---|
3807 | } else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem, |
---|
3808 | SSL_FILETYPE_PEM) == 0) { |
---|
3809 | cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error()); |
---|
3810 | return 0; |
---|
3811 | } |
---|
3812 | |
---|
3813 | if (CTX != NULL && chain != NULL && |
---|
3814 | SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) { |
---|
3815 | cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error()); |
---|
3816 | return 0; |
---|
3817 | } |
---|
3818 | |
---|
3819 | // Initialize locking callbacks, needed for thread safety. |
---|
3820 | // http://www.openssl.org/support/faq.html#PROG1 |
---|
3821 | size = sizeof(pthread_mutex_t) * CRYPTO_num_locks(); |
---|
3822 | if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) { |
---|
3823 | cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error()); |
---|
3824 | return 0; |
---|
3825 | } |
---|
3826 | |
---|
3827 | for (i = 0; i < CRYPTO_num_locks(); i++) { |
---|
3828 | pthread_mutex_init(&ssl_mutexes[i], NULL); |
---|
3829 | } |
---|
3830 | |
---|
3831 | CRYPTO_set_locking_callback(&ssl_locking_callback); |
---|
3832 | CRYPTO_set_id_callback(&ssl_id_callback); |
---|
3833 | |
---|
3834 | // Done with everything. Save the context. |
---|
3835 | ctx->ssl_ctx = CTX; |
---|
3836 | |
---|
3837 | return 1; |
---|
3838 | } |
---|
3839 | |
---|
3840 | static void uninitialize_ssl(struct mg_context *ctx) { |
---|
3841 | int i; |
---|
3842 | if (ctx->ssl_ctx != NULL) { |
---|
3843 | CRYPTO_set_locking_callback(NULL); |
---|
3844 | for (i = 0; i < CRYPTO_num_locks(); i++) { |
---|
3845 | pthread_mutex_destroy(&ssl_mutexes[i]); |
---|
3846 | } |
---|
3847 | CRYPTO_set_locking_callback(NULL); |
---|
3848 | CRYPTO_set_id_callback(NULL); |
---|
3849 | } |
---|
3850 | } |
---|
3851 | #endif // !NO_SSL |
---|
3852 | |
---|
3853 | static int set_gpass_option(struct mg_context *ctx) { |
---|
3854 | struct mgstat mgstat; |
---|
3855 | const char *path = ctx->config[GLOBAL_PASSWORDS_FILE]; |
---|
3856 | return path == NULL || mg_stat(path, &mgstat) == 0; |
---|
3857 | } |
---|
3858 | |
---|
3859 | static int set_acl_option(struct mg_context *ctx) { |
---|
3860 | union usa fake; |
---|
3861 | return check_acl(ctx, &fake) != -1; |
---|
3862 | } |
---|
3863 | |
---|
3864 | static void reset_per_request_attributes(struct mg_connection *conn) { |
---|
3865 | struct mg_request_info *ri = &conn->request_info; |
---|
3866 | |
---|
3867 | // Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port |
---|
3868 | ri->remote_user = ri->request_method = ri->uri = ri->http_version = |
---|
3869 | conn->path_info = NULL; |
---|
3870 | ri->num_headers = 0; |
---|
3871 | ri->status_code = -1; |
---|
3872 | |
---|
3873 | conn->num_bytes_sent = conn->consumed_content = 0; |
---|
3874 | conn->content_len = -1; |
---|
3875 | conn->request_len = conn->data_len = 0; |
---|
3876 | conn->must_close = 0; |
---|
3877 | } |
---|
3878 | |
---|
3879 | static void close_socket_gracefully(SOCKET sock) { |
---|
3880 | char buf[BUFSIZ]; |
---|
3881 | struct linger linger; |
---|
3882 | int n; |
---|
3883 | |
---|
3884 | // Set linger option to avoid socket hanging out after close. This prevent |
---|
3885 | // ephemeral port exhaust problem under high QPS. |
---|
3886 | linger.l_onoff = 1; |
---|
3887 | linger.l_linger = 1; |
---|
3888 | setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &linger, sizeof(linger)); |
---|
3889 | |
---|
3890 | // Send FIN to the client |
---|
3891 | (void) shutdown(sock, SHUT_WR); |
---|
3892 | set_non_blocking_mode(sock); |
---|
3893 | |
---|
3894 | // Read and discard pending data. If we do not do that and close the |
---|
3895 | // socket, the data in the send buffer may be discarded. This |
---|
3896 | // behaviour is seen on Windows, when client keeps sending data |
---|
3897 | // when server decide to close the connection; then when client |
---|
3898 | // does recv() it gets no data back. |
---|
3899 | do { |
---|
3900 | n = pull(NULL, sock, NULL, buf, sizeof(buf)); |
---|
3901 | } while (n > 0); |
---|
3902 | |
---|
3903 | // Now we know that our FIN is ACK-ed, safe to close |
---|
3904 | (void) closesocket(sock); |
---|
3905 | } |
---|
3906 | |
---|
3907 | static void close_connection(struct mg_connection *conn) { |
---|
3908 | if (conn->ssl) { |
---|
3909 | SSL_free(conn->ssl); |
---|
3910 | conn->ssl = NULL; |
---|
3911 | } |
---|
3912 | |
---|
3913 | if (conn->client.sock != INVALID_SOCKET) { |
---|
3914 | close_socket_gracefully(conn->client.sock); |
---|
3915 | } |
---|
3916 | } |
---|
3917 | |
---|
3918 | static void discard_current_request_from_buffer(struct mg_connection *conn) { |
---|
3919 | char *buffered; |
---|
3920 | int buffered_len, body_len; |
---|
3921 | |
---|
3922 | buffered = conn->buf + conn->request_len; |
---|
3923 | buffered_len = conn->data_len - conn->request_len; |
---|
3924 | assert(buffered_len >= 0); |
---|
3925 | |
---|
3926 | if (conn->content_len <= 0) { |
---|
3927 | // Protect from negative Content-Length, too |
---|
3928 | body_len = 0; |
---|
3929 | } else if (conn->content_len < (int64_t) buffered_len) { |
---|
3930 | body_len = (int) conn->content_len; |
---|
3931 | } else { |
---|
3932 | body_len = buffered_len; |
---|
3933 | } |
---|
3934 | |
---|
3935 | conn->data_len -= conn->request_len + body_len; |
---|
3936 | memmove(conn->buf, conn->buf + conn->request_len + body_len, |
---|
3937 | (size_t) conn->data_len); |
---|
3938 | } |
---|
3939 | |
---|
3940 | static int is_valid_uri(const char *uri) { |
---|
3941 | // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2 |
---|
3942 | // URI can be an asterisk (*) or should start with slash. |
---|
3943 | return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'); |
---|
3944 | } |
---|
3945 | |
---|
3946 | static void process_new_connection(struct mg_connection *conn) { |
---|
3947 | struct mg_request_info *ri = &conn->request_info; |
---|
3948 | int keep_alive_enabled; |
---|
3949 | const char *cl; |
---|
3950 | |
---|
3951 | keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes"); |
---|
3952 | |
---|
3953 | do { |
---|
3954 | reset_per_request_attributes(conn); |
---|
3955 | conn->request_len = read_request(NULL, conn->client.sock, conn->ssl, |
---|
3956 | conn->buf, conn->buf_size, |
---|
3957 | &conn->data_len); |
---|
3958 | assert(conn->data_len >= conn->request_len); |
---|
3959 | if (conn->request_len == 0 && conn->data_len == conn->buf_size) { |
---|
3960 | send_http_error(conn, 413, "Request Too Large", ""); |
---|
3961 | return; |
---|
3962 | } if (conn->request_len <= 0) { |
---|
3963 | return; // Remote end closed the connection |
---|
3964 | } |
---|
3965 | |
---|
3966 | // Nul-terminate the request cause parse_http_request() uses sscanf |
---|
3967 | conn->buf[conn->request_len - 1] = '\0'; |
---|
3968 | if (!parse_http_request(conn->buf, ri) || !is_valid_uri(ri->uri)) { |
---|
3969 | // Do not put garbage in the access log, just send it back to the client |
---|
3970 | send_http_error(conn, 400, "Bad Request", |
---|
3971 | "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf); |
---|
3972 | } else if (strcmp(ri->http_version, "1.0") && |
---|
3973 | strcmp(ri->http_version, "1.1")) { |
---|
3974 | // Request seems valid, but HTTP version is strange |
---|
3975 | send_http_error(conn, 505, "HTTP version not supported", ""); |
---|
3976 | log_access(conn); |
---|
3977 | } else { |
---|
3978 | // Request is valid, handle it |
---|
3979 | cl = get_header(ri, "Content-Length"); |
---|
3980 | conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10); |
---|
3981 | conn->birth_time = time(NULL); |
---|
3982 | handle_request(conn); |
---|
3983 | call_user(conn, MG_REQUEST_COMPLETE); |
---|
3984 | log_access(conn); |
---|
3985 | discard_current_request_from_buffer(conn); |
---|
3986 | } |
---|
3987 | if (ri->remote_user != NULL) { |
---|
3988 | free((void *) ri->remote_user); |
---|
3989 | } |
---|
3990 | } while (conn->ctx->stop_flag == 0 && |
---|
3991 | keep_alive_enabled && |
---|
3992 | should_keep_alive(conn)); |
---|
3993 | } |
---|
3994 | |
---|
3995 | // Worker threads take accepted socket from the queue |
---|
3996 | static int consume_socket(struct mg_context *ctx, struct socket *sp) { |
---|
3997 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
3998 | DEBUG_TRACE(("going idle")); |
---|
3999 | |
---|
4000 | // If the queue is empty, wait. We're idle at this point. |
---|
4001 | while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) { |
---|
4002 | pthread_cond_wait(&ctx->sq_full, &ctx->mutex); |
---|
4003 | } |
---|
4004 | |
---|
4005 | // If we're stopping, sq_head may be equal to sq_tail. |
---|
4006 | if (ctx->sq_head > ctx->sq_tail) { |
---|
4007 | // Copy socket from the queue and increment tail |
---|
4008 | *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)]; |
---|
4009 | ctx->sq_tail++; |
---|
4010 | DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock)); |
---|
4011 | |
---|
4012 | // Wrap pointers if needed |
---|
4013 | while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) { |
---|
4014 | ctx->sq_tail -= ARRAY_SIZE(ctx->queue); |
---|
4015 | ctx->sq_head -= ARRAY_SIZE(ctx->queue); |
---|
4016 | } |
---|
4017 | } |
---|
4018 | |
---|
4019 | (void) pthread_cond_signal(&ctx->sq_empty); |
---|
4020 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
4021 | |
---|
4022 | return !ctx->stop_flag; |
---|
4023 | } |
---|
4024 | |
---|
4025 | static void worker_thread(struct mg_context *ctx) { |
---|
4026 | struct mg_connection *conn; |
---|
4027 | int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]); |
---|
4028 | |
---|
4029 | conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size); |
---|
4030 | if (conn == NULL) { |
---|
4031 | cry(fc(ctx), "%s", "Cannot create new connection struct, OOM"); |
---|
4032 | return; |
---|
4033 | } |
---|
4034 | conn->buf_size = buf_size; |
---|
4035 | conn->buf = (char *) (conn + 1); |
---|
4036 | |
---|
4037 | // Call consume_socket() even when ctx->stop_flag > 0, to let it signal |
---|
4038 | // sq_empty condvar to wake up the master waiting in produce_socket() |
---|
4039 | while (consume_socket(ctx, &conn->client)) { |
---|
4040 | conn->birth_time = time(NULL); |
---|
4041 | conn->ctx = ctx; |
---|
4042 | |
---|
4043 | // Fill in IP, port info early so even if SSL setup below fails, |
---|
4044 | // error handler would have the corresponding info. |
---|
4045 | // Thanks to Johannes Winkelmann for the patch. |
---|
4046 | // TODO(lsm): Fix IPv6 case |
---|
4047 | conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port); |
---|
4048 | memcpy(&conn->request_info.remote_ip, |
---|
4049 | &conn->client.rsa.sin.sin_addr.s_addr, 4); |
---|
4050 | conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip); |
---|
4051 | conn->request_info.is_ssl = conn->client.is_ssl; |
---|
4052 | |
---|
4053 | if (!conn->client.is_ssl || |
---|
4054 | (conn->client.is_ssl && sslize(conn, SSL_accept))) { |
---|
4055 | process_new_connection(conn); |
---|
4056 | } |
---|
4057 | |
---|
4058 | close_connection(conn); |
---|
4059 | } |
---|
4060 | free(conn); |
---|
4061 | |
---|
4062 | // Signal master that we're done with connection and exiting |
---|
4063 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
4064 | ctx->num_threads--; |
---|
4065 | (void) pthread_cond_signal(&ctx->cond); |
---|
4066 | assert(ctx->num_threads >= 0); |
---|
4067 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
4068 | |
---|
4069 | DEBUG_TRACE(("exiting")); |
---|
4070 | } |
---|
4071 | |
---|
4072 | // Master thread adds accepted socket to a queue |
---|
4073 | static void produce_socket(struct mg_context *ctx, const struct socket *sp) { |
---|
4074 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
4075 | |
---|
4076 | // If the queue is full, wait |
---|
4077 | while (ctx->stop_flag == 0 && |
---|
4078 | ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) { |
---|
4079 | (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex); |
---|
4080 | } |
---|
4081 | |
---|
4082 | if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) { |
---|
4083 | // Copy socket to the queue and increment head |
---|
4084 | ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp; |
---|
4085 | ctx->sq_head++; |
---|
4086 | DEBUG_TRACE(("queued socket %d", sp->sock)); |
---|
4087 | } |
---|
4088 | |
---|
4089 | (void) pthread_cond_signal(&ctx->sq_full); |
---|
4090 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
4091 | } |
---|
4092 | |
---|
4093 | static void accept_new_connection(const struct socket *listener, |
---|
4094 | struct mg_context *ctx) { |
---|
4095 | struct socket accepted; |
---|
4096 | char src_addr[20]; |
---|
4097 | socklen_t len; |
---|
4098 | int allowed; |
---|
4099 | |
---|
4100 | len = sizeof(accepted.rsa); |
---|
4101 | accepted.lsa = listener->lsa; |
---|
4102 | accepted.sock = accept(listener->sock, &accepted.rsa.sa, &len); |
---|
4103 | if (accepted.sock != INVALID_SOCKET) { |
---|
4104 | allowed = check_acl(ctx, &accepted.rsa); |
---|
4105 | if (allowed) { |
---|
4106 | // Put accepted socket structure into the queue |
---|
4107 | DEBUG_TRACE(("accepted socket %d", accepted.sock)); |
---|
4108 | accepted.is_ssl = listener->is_ssl; |
---|
4109 | produce_socket(ctx, &accepted); |
---|
4110 | } else { |
---|
4111 | sockaddr_to_string(src_addr, sizeof(src_addr), &accepted.rsa); |
---|
4112 | cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr); |
---|
4113 | (void) closesocket(accepted.sock); |
---|
4114 | } |
---|
4115 | } |
---|
4116 | } |
---|
4117 | |
---|
4118 | static void master_thread(struct mg_context *ctx) { |
---|
4119 | fd_set read_set; |
---|
4120 | struct timeval tv; |
---|
4121 | struct socket *sp; |
---|
4122 | int max_fd; |
---|
4123 | |
---|
4124 | // Increase priority of the master thread |
---|
4125 | #if defined(_WIN32) |
---|
4126 | SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL); |
---|
4127 | #endif |
---|
4128 | |
---|
4129 | #if defined(ISSUE_317) |
---|
4130 | struct sched_param sched_param; |
---|
4131 | sched_param.sched_priority = sched_get_priority_max(SCHED_RR); |
---|
4132 | pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param); |
---|
4133 | #endif |
---|
4134 | |
---|
4135 | while (ctx->stop_flag == 0) { |
---|
4136 | FD_ZERO(&read_set); |
---|
4137 | max_fd = -1; |
---|
4138 | |
---|
4139 | // Add listening sockets to the read set |
---|
4140 | for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) { |
---|
4141 | add_to_set(sp->sock, &read_set, &max_fd); |
---|
4142 | } |
---|
4143 | |
---|
4144 | tv.tv_sec = 0; |
---|
4145 | tv.tv_usec = 200 * 1000; |
---|
4146 | |
---|
4147 | if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) { |
---|
4148 | #ifdef _WIN32 |
---|
4149 | // On windows, if read_set and write_set are empty, |
---|
4150 | // select() returns "Invalid parameter" error |
---|
4151 | // (at least on my Windows XP Pro). So in this case, we sleep here. |
---|
4152 | mg_sleep(1000); |
---|
4153 | #endif // _WIN32 |
---|
4154 | } else { |
---|
4155 | for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) { |
---|
4156 | if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) { |
---|
4157 | accept_new_connection(sp, ctx); |
---|
4158 | } |
---|
4159 | } |
---|
4160 | } |
---|
4161 | } |
---|
4162 | DEBUG_TRACE(("stopping workers")); |
---|
4163 | |
---|
4164 | // Stop signal received: somebody called mg_stop. Quit. |
---|
4165 | close_all_listening_sockets(ctx); |
---|
4166 | |
---|
4167 | // Wakeup workers that are waiting for connections to handle. |
---|
4168 | pthread_cond_broadcast(&ctx->sq_full); |
---|
4169 | |
---|
4170 | // Wait until all threads finish |
---|
4171 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
4172 | while (ctx->num_threads > 0) { |
---|
4173 | (void) pthread_cond_wait(&ctx->cond, &ctx->mutex); |
---|
4174 | } |
---|
4175 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
4176 | |
---|
4177 | // All threads exited, no sync is needed. Destroy mutex and condvars |
---|
4178 | (void) pthread_mutex_destroy(&ctx->mutex); |
---|
4179 | (void) pthread_cond_destroy(&ctx->cond); |
---|
4180 | (void) pthread_cond_destroy(&ctx->sq_empty); |
---|
4181 | (void) pthread_cond_destroy(&ctx->sq_full); |
---|
4182 | |
---|
4183 | #if !defined(NO_SSL) |
---|
4184 | uninitialize_ssl(ctx); |
---|
4185 | #endif |
---|
4186 | |
---|
4187 | // Signal mg_stop() that we're done |
---|
4188 | ctx->stop_flag = 2; |
---|
4189 | |
---|
4190 | DEBUG_TRACE(("exiting")); |
---|
4191 | } |
---|
4192 | |
---|
4193 | static void free_context(struct mg_context *ctx) { |
---|
4194 | int i; |
---|
4195 | |
---|
4196 | // Deallocate config parameters |
---|
4197 | for (i = 0; i < NUM_OPTIONS; i++) { |
---|
4198 | if (ctx->config[i] != NULL) |
---|
4199 | free(ctx->config[i]); |
---|
4200 | } |
---|
4201 | |
---|
4202 | // Deallocate SSL context |
---|
4203 | if (ctx->ssl_ctx != NULL) { |
---|
4204 | SSL_CTX_free(ctx->ssl_ctx); |
---|
4205 | } |
---|
4206 | #ifndef NO_SSL |
---|
4207 | if (ssl_mutexes != NULL) { |
---|
4208 | free(ssl_mutexes); |
---|
4209 | } |
---|
4210 | #endif // !NO_SSL |
---|
4211 | |
---|
4212 | // Deallocate context itself |
---|
4213 | free(ctx); |
---|
4214 | } |
---|
4215 | |
---|
4216 | void mg_stop(struct mg_context *ctx) { |
---|
4217 | ctx->stop_flag = 1; |
---|
4218 | |
---|
4219 | // Wait until mg_fini() stops |
---|
4220 | while (ctx->stop_flag != 2) { |
---|
4221 | mg_sleep(10); |
---|
4222 | } |
---|
4223 | free_context(ctx); |
---|
4224 | |
---|
4225 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
4226 | (void) WSACleanup(); |
---|
4227 | #endif // _WIN32 |
---|
4228 | } |
---|
4229 | |
---|
4230 | struct mg_context *mg_start(mg_callback_t user_callback, void *user_data, |
---|
4231 | const char **options) { |
---|
4232 | struct mg_context *ctx; |
---|
4233 | const char *name, *value, *default_value; |
---|
4234 | int i; |
---|
4235 | |
---|
4236 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
4237 | WSADATA data; |
---|
4238 | WSAStartup(MAKEWORD(2,2), &data); |
---|
4239 | InitializeCriticalSection(&global_log_file_lock); |
---|
4240 | #endif // _WIN32 |
---|
4241 | |
---|
4242 | // Allocate context and initialize reasonable general case defaults. |
---|
4243 | // TODO(lsm): do proper error handling here. |
---|
4244 | ctx = (struct mg_context *) calloc(1, sizeof(*ctx)); |
---|
4245 | ctx->user_callback = user_callback; |
---|
4246 | ctx->user_data = user_data; |
---|
4247 | |
---|
4248 | while (options && (name = *options++) != NULL) { |
---|
4249 | if ((i = get_option_index(name)) == -1) { |
---|
4250 | cry(fc(ctx), "Invalid option: %s", name); |
---|
4251 | free_context(ctx); |
---|
4252 | return NULL; |
---|
4253 | } else if ((value = *options++) == NULL) { |
---|
4254 | cry(fc(ctx), "%s: option value cannot be NULL", name); |
---|
4255 | free_context(ctx); |
---|
4256 | return NULL; |
---|
4257 | } |
---|
4258 | if (ctx->config[i] != NULL) { |
---|
4259 | cry(fc(ctx), "%s: duplicate option", name); |
---|
4260 | } |
---|
4261 | ctx->config[i] = mg_strdup(value); |
---|
4262 | DEBUG_TRACE(("[%s] -> [%s]", name, value)); |
---|
4263 | } |
---|
4264 | |
---|
4265 | // Set default value if needed |
---|
4266 | for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) { |
---|
4267 | default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2]; |
---|
4268 | if (ctx->config[i] == NULL && default_value != NULL) { |
---|
4269 | ctx->config[i] = mg_strdup(default_value); |
---|
4270 | DEBUG_TRACE(("Setting default: [%s] -> [%s]", |
---|
4271 | config_options[i * ENTRIES_PER_CONFIG_OPTION + 1], |
---|
4272 | default_value)); |
---|
4273 | } |
---|
4274 | } |
---|
4275 | |
---|
4276 | // NOTE(lsm): order is important here. SSL certificates must |
---|
4277 | // be initialized before listening ports. UID must be set last. |
---|
4278 | if (!set_gpass_option(ctx) || |
---|
4279 | #if !defined(NO_SSL) |
---|
4280 | !set_ssl_option(ctx) || |
---|
4281 | #endif |
---|
4282 | !set_ports_option(ctx) || |
---|
4283 | #if !defined(_WIN32) |
---|
4284 | !set_uid_option(ctx) || |
---|
4285 | #endif |
---|
4286 | !set_acl_option(ctx)) { |
---|
4287 | free_context(ctx); |
---|
4288 | return NULL; |
---|
4289 | } |
---|
4290 | |
---|
4291 | #if !defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
4292 | // Ignore SIGPIPE signal, so if browser cancels the request, it |
---|
4293 | // won't kill the whole process. |
---|
4294 | (void) signal(SIGPIPE, SIG_IGN); |
---|
4295 | // Also ignoring SIGCHLD to let the OS to reap zombies properly. |
---|
4296 | (void) signal(SIGCHLD, SIG_IGN); |
---|
4297 | #endif // !_WIN32 |
---|
4298 | |
---|
4299 | (void) pthread_mutex_init(&ctx->mutex, NULL); |
---|
4300 | (void) pthread_cond_init(&ctx->cond, NULL); |
---|
4301 | (void) pthread_cond_init(&ctx->sq_empty, NULL); |
---|
4302 | (void) pthread_cond_init(&ctx->sq_full, NULL); |
---|
4303 | |
---|
4304 | // Start master (listening) thread |
---|
4305 | start_thread(ctx, (mg_thread_func_t) master_thread, ctx); |
---|
4306 | |
---|
4307 | // Start worker threads |
---|
4308 | for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) { |
---|
4309 | if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) { |
---|
4310 | cry(fc(ctx), "Cannot start worker thread: %d", ERRNO); |
---|
4311 | } else { |
---|
4312 | ctx->num_threads++; |
---|
4313 | } |
---|
4314 | } |
---|
4315 | |
---|
4316 | return ctx; |
---|
4317 | } |
---|