1 | /* |
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2 | * Copyright (c) 2004-2009 Sergey Lyubka |
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3 | * Portions Copyright (c) 2009 Gilbert Wellisch |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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6 | * of this software and associated documentation files (the "Software"), to deal |
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7 | * in the Software without restriction, including without limitation the rights |
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8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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9 | * copies of the Software, and to permit persons to whom the Software is |
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10 | * furnished to do so, subject to the following conditions: |
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11 | * |
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12 | * The above copyright notice and this permission notice shall be included in |
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13 | * all copies or substantial portions of the Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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21 | * THE SOFTWARE. |
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22 | * |
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23 | * $Id$ |
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24 | */ |
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25 | |
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26 | #if HAVE_CONFIG_H |
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27 | #include "config.h" |
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28 | #endif |
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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 | #endif /* _WIN32 */ |
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33 | |
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34 | #ifndef _WIN32_WCE /* Some ANSI #includes are not available on Windows CE */ |
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35 | #include <sys/types.h> |
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36 | #include <sys/stat.h> |
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37 | #include <errno.h> |
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38 | #include <signal.h> |
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39 | #include <fcntl.h> |
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40 | #endif /* !_WIN32_WCE */ |
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41 | |
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42 | #include <time.h> |
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43 | #include <stdlib.h> |
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44 | #include <stdarg.h> |
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45 | #include <assert.h> |
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46 | #include <string.h> |
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47 | #include <ctype.h> |
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48 | #include <limits.h> |
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49 | #include <stddef.h> |
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50 | #include <stdio.h> |
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51 | |
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52 | #if defined(_WIN32) /* Windows specific #includes and #defines */ |
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53 | #define _WIN32_WINNT 0x0400 /* To make it link in VS2005 */ |
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54 | #include <windows.h> |
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55 | |
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56 | #ifndef _WIN32_WCE |
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57 | #include <process.h> |
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58 | #include <direct.h> |
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59 | #include <io.h> |
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60 | #else /* _WIN32_WCE */ |
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61 | /* Windows CE-specific definitions */ |
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62 | #include <winsock2.h> |
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63 | #define NO_CGI /* WinCE has no pipes */ |
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64 | #define NO_SSI /* WinCE has no pipes */ |
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65 | |
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66 | #define FILENAME_MAX MAX_PATH |
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67 | #define BUFSIZ 4096 |
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68 | typedef long off_t; |
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69 | |
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70 | #define errno GetLastError() |
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71 | #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) |
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72 | #endif /* _WIN32_WCE */ |
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73 | |
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74 | #define EPOCH_DIFF 0x019DB1DED53E8000 /* 116444736000000000 nsecs */ |
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75 | #define RATE_DIFF 10000000 /* 100 nsecs */ |
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76 | #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ |
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77 | ((uint64_t)((uint32_t)(hi))) << 32)) |
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78 | #define SYS2UNIX_TIME(lo, hi) \ |
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79 | (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) |
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80 | |
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81 | /* |
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82 | * Visual Studio 6 does not know __func__ or __FUNCTION__ |
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83 | * The rest of MS compilers use __FUNCTION__, not C99 __func__ |
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84 | * Also use _strtoui64 on modern M$ compilers |
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85 | */ |
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86 | #if defined(_MSC_VER) && _MSC_VER < 1300 |
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87 | #define STRX(x) #x |
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88 | #define STR(x) STRX(x) |
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89 | #define __func__ "line " STR(__LINE__) |
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90 | #define strtoull(x, y, z) strtoul(x, y, z) |
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91 | #else |
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92 | #define __func__ __FUNCTION__ |
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93 | #define strtoull(x, y, z) _strtoui64(x, y, z) |
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94 | #endif /* _MSC_VER */ |
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95 | |
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96 | #define ERRNO GetLastError() |
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97 | #define NO_SOCKLEN_T |
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98 | #define SSL_LIB "ssleay32.dll" |
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99 | #define CRYPTO_LIB "libeay32.dll" |
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100 | #define DIRSEP '\\' |
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101 | #define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\') |
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102 | #define O_NONBLOCK 0 |
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103 | #define EWOULDBLOCK WSAEWOULDBLOCK |
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104 | #define _POSIX_ |
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105 | #define INT64_FMT "I64" |
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106 | |
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107 | #define SHUT_WR 1 |
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108 | #define snprintf _snprintf |
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109 | #define vsnprintf _vsnprintf |
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110 | #define sleep(x) Sleep((x) * 1000) |
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111 | |
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112 | #define popen(x, y) _popen(x, y) |
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113 | #define pclose(x) _pclose(x) |
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114 | #define close(x) _close(x) |
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115 | #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) |
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116 | #define RTLD_LAZY 0 |
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117 | #define fseeko(x, y, z) fseek((x), (y), (z)) |
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118 | #define fdopen(x, y) _fdopen((x), (y)) |
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119 | #define write(x, y, z) _write((x), (y), (unsigned) z) |
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120 | #define read(x, y, z) _read((x), (y), (unsigned) z) |
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121 | #define flockfile(x) (void) 0 |
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122 | #define funlockfile(x) (void) 0 |
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123 | |
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124 | #if !defined(fileno) |
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125 | #define fileno(x) _fileno(x) |
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126 | #endif /* !fileno MINGW #defines fileno */ |
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127 | |
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128 | typedef HANDLE pthread_mutex_t; |
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129 | typedef HANDLE pthread_cond_t; |
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130 | typedef DWORD pthread_t; |
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131 | #define pid_t HANDLE /* MINGW typedefs pid_t to int. Using #define here. */ |
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132 | |
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133 | struct timespec { |
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134 | long tv_nsec; |
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135 | long tv_sec; |
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136 | }; |
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137 | |
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138 | static int pthread_mutex_lock(pthread_mutex_t *); |
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139 | static int pthread_mutex_unlock(pthread_mutex_t *); |
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140 | |
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141 | #if defined(HAVE_STDINT) |
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142 | #include <stdint.h> |
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143 | #else |
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144 | typedef unsigned int uint32_t; |
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145 | typedef unsigned short uint16_t; |
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146 | typedef unsigned __int64 uint64_t; |
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147 | typedef __int64 int64_t; |
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148 | #define INT64_MAX 9223372036854775807 |
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149 | #endif /* HAVE_STDINT */ |
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150 | |
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151 | /* |
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152 | * POSIX dirent interface |
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153 | */ |
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154 | struct dirent { |
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155 | char d_name[FILENAME_MAX]; |
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156 | }; |
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157 | |
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158 | typedef struct DIR { |
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159 | HANDLE handle; |
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160 | WIN32_FIND_DATAW info; |
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161 | struct dirent result; |
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162 | } DIR; |
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163 | |
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164 | #else /* UNIX specific */ |
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165 | #include <sys/wait.h> |
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166 | #include <sys/socket.h> |
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167 | #include <sys/select.h> |
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168 | #if HAVE_SYS_MMAN_H |
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169 | #include <sys/mman.h> |
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170 | #endif |
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171 | #include <netinet/in.h> |
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172 | #include <arpa/inet.h> |
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173 | #include <sys/time.h> |
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174 | #include <stdint.h> |
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175 | #include <inttypes.h> |
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176 | |
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177 | #include <pwd.h> |
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178 | #include <unistd.h> |
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179 | #include <dirent.h> |
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180 | #if HAVE_DLFCN_H |
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181 | #include <dlfcn.h> |
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182 | #endif |
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183 | #include <pthread.h> |
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184 | #define SSL_LIB "libssl.so" |
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185 | #define CRYPTO_LIB "libcrypto.so" |
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186 | #define DIRSEP '/' |
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187 | #define IS_DIRSEP_CHAR(c) ((c) == '/') |
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188 | #define O_BINARY 0 |
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189 | #define closesocket(a) close(a) |
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190 | #define mg_fopen(x, y) fopen(x, y) |
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191 | #define mg_mkdir(x, y) mkdir(x, y) |
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192 | #define mg_remove(x) remove(x) |
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193 | #define mg_rename(x, y) rename(x, y) |
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194 | #define ERRNO errno |
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195 | #define INVALID_SOCKET (-1) |
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196 | #define INT64_FMT PRId64 |
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197 | typedef int SOCKET; |
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198 | |
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199 | #endif /* End of Windows and UNIX specific includes */ |
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200 | |
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201 | #include "mongoose.h" |
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202 | |
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203 | #define MONGOOSE_VERSION "2.9" |
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204 | #define PASSWORDS_FILE_NAME ".htpasswd" |
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205 | #define CGI_ENVIRONMENT_SIZE 4096 |
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206 | #define MAX_CGI_ENVIR_VARS 64 |
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207 | #define MAX_REQUEST_SIZE 8192 |
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208 | #define MAX_LISTENING_SOCKETS 10 |
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209 | #define MAX_CALLBACKS 20 |
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210 | #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) |
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211 | #define DEBUG_MGS_PREFIX "*** Mongoose debug *** " |
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212 | |
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213 | #if defined(DEBUG) |
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214 | #define DEBUG_TRACE(x) do {printf x; putchar('\n'); fflush(stdout);} while (0) |
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215 | #else |
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216 | #define DEBUG_TRACE(x) |
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217 | #endif /* DEBUG */ |
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218 | |
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219 | /* |
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220 | * Darwin prior to 7.0 and Win32 do not have socklen_t |
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221 | */ |
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222 | #ifdef NO_SOCKLEN_T |
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223 | typedef int socklen_t; |
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224 | #endif /* NO_SOCKLEN_T */ |
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225 | |
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226 | #if !defined(FALSE) |
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227 | enum {FALSE, TRUE}; |
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228 | #endif /* !FALSE */ |
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229 | |
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230 | typedef int bool_t; |
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231 | typedef void * (*mg_thread_func_t)(void *); |
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232 | |
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233 | static const char *http_500_error = "Internal Server Error"; |
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234 | |
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235 | /* |
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236 | * Snatched from OpenSSL includes. I put the prototypes here to be independent |
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237 | * from the OpenSSL source installation. Having this, mongoose + SSL can be |
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238 | * built on any system with binary SSL libraries installed. |
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239 | */ |
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240 | typedef struct ssl_st SSL; |
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241 | typedef struct ssl_method_st SSL_METHOD; |
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242 | typedef struct ssl_ctx_st SSL_CTX; |
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243 | |
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244 | #define SSL_ERROR_WANT_READ 2 |
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245 | #define SSL_ERROR_WANT_WRITE 3 |
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246 | #define SSL_FILETYPE_PEM 1 |
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247 | #define CRYPTO_LOCK 1 |
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248 | |
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249 | /* |
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250 | * Dynamically loaded SSL functionality |
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251 | */ |
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252 | struct ssl_func { |
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253 | const char *name; /* SSL function name */ |
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254 | void (*ptr)(void); /* Function pointer */ |
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255 | }; |
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256 | |
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257 | #define SSL_free(x) (* (void (*)(SSL *)) ssl_sw[0].ptr)(x) |
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258 | #define SSL_accept(x) (* (int (*)(SSL *)) ssl_sw[1].ptr)(x) |
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259 | #define SSL_connect(x) (* (int (*)(SSL *)) ssl_sw[2].ptr)(x) |
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260 | #define SSL_read(x,y,z) (* (int (*)(SSL *, void *, int)) \ |
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261 | ssl_sw[3].ptr)((x),(y),(z)) |
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262 | #define SSL_write(x,y,z) (* (int (*)(SSL *, const void *,int)) \ |
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263 | ssl_sw[4].ptr)((x), (y), (z)) |
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264 | #define SSL_get_error(x,y)(* (int (*)(SSL *, int)) ssl_sw[5])((x), (y)) |
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265 | #define SSL_set_fd(x,y) (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)((x), (y)) |
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266 | #define SSL_new(x) (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)(x) |
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267 | #define SSL_CTX_new(x) (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)(x) |
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268 | #define SSLv23_server_method() (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)() |
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269 | #define SSL_library_init() (* (int (*)(void)) ssl_sw[10].ptr)() |
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270 | #define SSL_CTX_use_PrivateKey_file(x,y,z) (* (int (*)(SSL_CTX *, \ |
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271 | const char *, int)) ssl_sw[11].ptr)((x), (y), (z)) |
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272 | #define SSL_CTX_use_certificate_file(x,y,z) (* (int (*)(SSL_CTX *, \ |
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273 | const char *, int)) ssl_sw[12].ptr)((x), (y), (z)) |
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274 | #define SSL_CTX_set_default_passwd_cb(x,y) \ |
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275 | (* (void (*)(SSL_CTX *, mg_spcb_t)) ssl_sw[13].ptr)((x),(y)) |
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276 | #define SSL_CTX_free(x) (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)(x) |
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277 | |
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278 | #define CRYPTO_num_locks() (* (int (*)(void)) crypto_sw[0].ptr)() |
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279 | #define CRYPTO_set_locking_callback(x) \ |
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280 | (* (void (*)(void (*)(int, int, const char *, int))) \ |
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281 | crypto_sw[1].ptr)(x) |
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282 | #define CRYPTO_set_id_callback(x) \ |
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283 | (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)(x) |
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284 | |
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285 | /* |
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286 | * set_ssl_option() function when called, updates this array. |
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287 | * It loads SSL library dynamically and changes NULLs to the actual addresses |
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288 | * of respective functions. The macros above (like SSL_connect()) are really |
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289 | * just calling these functions indirectly via the pointer. |
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290 | */ |
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291 | static struct ssl_func ssl_sw[] = { |
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292 | {"SSL_free", NULL}, |
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293 | {"SSL_accept", NULL}, |
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294 | {"SSL_connect", NULL}, |
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295 | {"SSL_read", NULL}, |
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296 | {"SSL_write", NULL}, |
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297 | {"SSL_get_error", NULL}, |
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298 | {"SSL_set_fd", NULL}, |
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299 | {"SSL_new", NULL}, |
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300 | {"SSL_CTX_new", NULL}, |
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301 | {"SSLv23_server_method", NULL}, |
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302 | {"SSL_library_init", NULL}, |
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303 | {"SSL_CTX_use_PrivateKey_file", NULL}, |
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304 | {"SSL_CTX_use_certificate_file",NULL}, |
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305 | {"SSL_CTX_set_default_passwd_cb",NULL}, |
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306 | {"SSL_CTX_free", NULL}, |
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307 | {NULL, NULL} |
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308 | }; |
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309 | |
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310 | /* |
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311 | * Similar array as ssl_sw. These functions are located in different lib. |
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312 | */ |
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313 | static struct ssl_func crypto_sw[] = { |
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314 | {"CRYPTO_num_locks", NULL}, |
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315 | {"CRYPTO_set_locking_callback", NULL}, |
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316 | {"CRYPTO_set_id_callback", NULL}, |
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317 | {NULL, NULL} |
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318 | }; |
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319 | |
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320 | /* |
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321 | * Month names |
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322 | */ |
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323 | static const char *month_names[] = { |
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324 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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325 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
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326 | }; |
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327 | |
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328 | /* |
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329 | * Unified socket address. For IPv6 support, add IPv6 address structure |
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330 | * in the union u. |
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331 | */ |
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332 | struct usa { |
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333 | socklen_t len; |
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334 | union { |
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335 | struct sockaddr sa; |
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336 | struct sockaddr_in sin; |
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337 | } u; |
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338 | }; |
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339 | |
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340 | /* |
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341 | * Specifies a string (chunk of memory). |
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342 | * Used to traverse comma separated lists of options. |
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343 | */ |
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344 | struct vec { |
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345 | const char *ptr; |
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346 | size_t len; |
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347 | }; |
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348 | |
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349 | /* |
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350 | * Structure used by mg_stat() function. Uses 64 bit file length. |
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351 | */ |
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352 | struct mgstat { |
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353 | bool_t is_directory; /* Directory marker */ |
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354 | int64_t size; /* File size */ |
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355 | time_t mtime; /* Modification time */ |
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356 | }; |
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357 | |
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358 | struct mg_option { |
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359 | const char *name; |
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360 | const char *description; |
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361 | const char *default_value; |
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362 | int index; |
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363 | bool_t (*setter)(struct mg_context *, const char *); |
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364 | }; |
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365 | |
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366 | /* |
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367 | * Numeric indexes for the option values in context, ctx->options |
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368 | */ |
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369 | enum mg_option_index { |
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370 | OPT_ROOT, OPT_INDEX_FILES, OPT_PORTS, OPT_DIR_LIST, OPT_CGI_EXTENSIONS, |
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371 | OPT_CGI_INTERPRETER, OPT_CGI_ENV, OPT_SSI_EXTENSIONS, OPT_AUTH_DOMAIN, |
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372 | OPT_AUTH_GPASSWD, OPT_AUTH_PUT, OPT_ACCESS_LOG, OPT_ERROR_LOG, |
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373 | OPT_SSL_CERTIFICATE, OPT_ALIASES, OPT_ACL, OPT_UID, OPT_PROTECT, |
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374 | OPT_SERVICE, OPT_HIDE, OPT_ADMIN_URI, OPT_MAX_THREADS, OPT_IDLE_TIME, |
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375 | OPT_MIME_TYPES, |
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376 | NUM_OPTIONS |
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377 | }; |
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378 | |
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379 | /* |
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380 | * Structure used to describe listening socket, or socket which was |
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381 | * accept()-ed by the master thread and queued for future handling |
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382 | * by the worker thread. |
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383 | */ |
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384 | struct socket { |
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385 | SOCKET sock; /* Listening socket */ |
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386 | struct usa lsa; /* Local socket address */ |
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387 | struct usa rsa; /* Remote socket address */ |
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388 | bool_t is_ssl; /* Is socket SSL-ed */ |
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389 | }; |
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390 | |
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391 | /* |
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392 | * Callback function, and where it is bound to |
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393 | */ |
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394 | struct callback { |
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395 | char *uri_regex; /* URI regex to handle */ |
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396 | mg_callback_t func; /* user callback */ |
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397 | bool_t is_auth; /* func is auth checker */ |
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398 | int status_code; /* error code to handle */ |
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399 | void *user_data; /* opaque user data */ |
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400 | }; |
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401 | |
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402 | /* |
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403 | * Mongoose context |
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404 | */ |
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405 | struct mg_context { |
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406 | int stop_flag; /* Should we stop event loop */ |
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407 | SSL_CTX *ssl_ctx; /* SSL context */ |
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408 | |
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409 | FILE *access_log; /* Opened access log */ |
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410 | FILE *error_log; /* Opened error log */ |
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411 | |
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412 | struct socket listeners[MAX_LISTENING_SOCKETS]; |
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413 | int num_listeners; |
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414 | |
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415 | struct callback callbacks[MAX_CALLBACKS]; |
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416 | int num_callbacks; |
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417 | |
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418 | char *options[NUM_OPTIONS]; /* Configured opions */ |
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419 | pthread_mutex_t opt_mutex[NUM_OPTIONS]; /* Option protector */ |
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420 | |
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421 | int max_threads; /* Maximum number of threads */ |
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422 | int num_threads; /* Number of threads */ |
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423 | int num_idle; /* Number of idle threads */ |
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424 | pthread_mutex_t thr_mutex; /* Protects (max|num)_threads */ |
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425 | pthread_cond_t thr_cond; |
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426 | pthread_mutex_t bind_mutex; /* Protects bind operations */ |
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427 | |
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428 | struct socket queue[20]; /* Accepted sockets */ |
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429 | int sq_head; /* Head of the socket queue */ |
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430 | int sq_tail; /* Tail of the socket queue */ |
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431 | pthread_cond_t empty_cond; /* Socket queue empty condvar */ |
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432 | pthread_cond_t full_cond; /* Socket queue full condvar */ |
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433 | |
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434 | mg_spcb_t ssl_password_callback; |
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435 | mg_callback_t log_callback; |
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436 | }; |
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437 | |
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438 | /* |
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439 | * Client connection. |
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440 | */ |
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441 | struct mg_connection { |
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442 | struct mg_request_info request_info; |
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443 | struct mg_context *ctx; /* Mongoose context we belong to*/ |
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444 | SSL *ssl; /* SSL descriptor */ |
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445 | struct socket client; /* Connected client */ |
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446 | time_t birth_time; /* Time connection was accepted */ |
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447 | bool_t free_post_data; /* post_data was malloc-ed */ |
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448 | bool_t embedded_auth; /* Used for authorization */ |
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449 | int64_t num_bytes_sent; /* Total bytes sent to client */ |
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450 | }; |
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451 | |
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452 | /* |
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453 | * Print error message to the opened error log stream. |
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454 | */ |
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455 | static void |
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456 | cry(struct mg_connection *conn, const char *fmt, ...) |
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457 | { |
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458 | char buf[BUFSIZ]; |
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459 | va_list ap; |
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460 | |
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461 | va_start(ap, fmt); |
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462 | (void) vsnprintf(buf, sizeof(buf), fmt, ap); |
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463 | conn->ctx->log_callback(conn, &conn->request_info, buf); |
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464 | va_end(ap); |
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465 | } |
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466 | |
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467 | /* |
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468 | * Return fake connection structure. Used for logging, if connection |
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469 | * is not applicable at the moment of logging. |
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470 | */ |
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471 | static struct mg_connection * |
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472 | fc(struct mg_context *ctx) |
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473 | { |
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474 | static struct mg_connection fake_connection; |
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475 | fake_connection.ctx = ctx; |
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476 | return (&fake_connection); |
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477 | } |
---|
478 | |
---|
479 | /* |
---|
480 | * If an embedded code does not intercept logging by calling |
---|
481 | * mg_set_log_callback(), this function is used for logging. It prints |
---|
482 | * stuff to the conn->error_log, which is stderr unless "error_log" |
---|
483 | * option was set. |
---|
484 | */ |
---|
485 | static void |
---|
486 | builtin_error_log(struct mg_connection *conn, |
---|
487 | const struct mg_request_info *request_info, void *message) |
---|
488 | { |
---|
489 | FILE *fp; |
---|
490 | time_t timestamp; |
---|
491 | |
---|
492 | fp = conn->ctx->error_log; |
---|
493 | flockfile(fp); |
---|
494 | |
---|
495 | timestamp = time(NULL); |
---|
496 | |
---|
497 | (void) fprintf(fp, |
---|
498 | "[%010lu] [error] [client %s] ", |
---|
499 | (unsigned long) timestamp, |
---|
500 | inet_ntoa(conn->client.rsa.u.sin.sin_addr)); |
---|
501 | |
---|
502 | if (request_info->request_method != NULL) |
---|
503 | (void) fprintf(fp, "%s %s: ", |
---|
504 | request_info->request_method, |
---|
505 | request_info->uri); |
---|
506 | |
---|
507 | (void) fprintf(fp, "%s", (char *) message); |
---|
508 | |
---|
509 | fputc('\n', fp); |
---|
510 | |
---|
511 | funlockfile(fp); |
---|
512 | } |
---|
513 | |
---|
514 | const char * |
---|
515 | mg_version(void) |
---|
516 | { |
---|
517 | return (MONGOOSE_VERSION); |
---|
518 | } |
---|
519 | |
---|
520 | static void |
---|
521 | mg_strlcpy(register char *dst, register const char *src, size_t n) |
---|
522 | { |
---|
523 | for (; *src != '\0' && n > 1; n--) |
---|
524 | *dst++ = *src++; |
---|
525 | *dst = '\0'; |
---|
526 | } |
---|
527 | |
---|
528 | static int |
---|
529 | lowercase(const char *s) |
---|
530 | { |
---|
531 | return (tolower(* (unsigned char *) s)); |
---|
532 | } |
---|
533 | |
---|
534 | static int |
---|
535 | mg_strncasecmp(const char *s1, const char *s2, size_t len) |
---|
536 | { |
---|
537 | int diff = 0; |
---|
538 | |
---|
539 | if (len > 0) |
---|
540 | do { |
---|
541 | diff = lowercase(s1++) - lowercase(s2++); |
---|
542 | } while (diff == 0 && s1[-1] != '\0' && --len > 0); |
---|
543 | |
---|
544 | return (diff); |
---|
545 | } |
---|
546 | |
---|
547 | static int |
---|
548 | mg_strcasecmp(const char *s1, const char *s2) |
---|
549 | { |
---|
550 | int diff; |
---|
551 | |
---|
552 | do { |
---|
553 | diff = lowercase(s1++) - lowercase(s2++); |
---|
554 | } while (diff == 0 && s1[-1] != '\0'); |
---|
555 | |
---|
556 | return (diff); |
---|
557 | } |
---|
558 | |
---|
559 | static char * |
---|
560 | mg_strndup(const char *ptr, size_t len) |
---|
561 | { |
---|
562 | char *p; |
---|
563 | |
---|
564 | if ((p = (char *) malloc(len + 1)) != NULL) |
---|
565 | mg_strlcpy(p, ptr, len + 1); |
---|
566 | |
---|
567 | return (p); |
---|
568 | |
---|
569 | } |
---|
570 | |
---|
571 | static char * |
---|
572 | mg_strdup(const char *str) |
---|
573 | { |
---|
574 | return (mg_strndup(str, strlen(str))); |
---|
575 | } |
---|
576 | |
---|
577 | /* |
---|
578 | * Like snprintf(), but never returns negative value, or the value |
---|
579 | * that is larger than a supplied buffer. |
---|
580 | * Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability |
---|
581 | * in his audit report. |
---|
582 | */ |
---|
583 | static int |
---|
584 | mg_vsnprintf(struct mg_connection *conn, |
---|
585 | char *buf, size_t buflen, const char *fmt, va_list ap) |
---|
586 | { |
---|
587 | int n; |
---|
588 | |
---|
589 | if (buflen == 0) |
---|
590 | return (0); |
---|
591 | |
---|
592 | n = vsnprintf(buf, buflen, fmt, ap); |
---|
593 | |
---|
594 | if (n < 0) { |
---|
595 | cry(conn, "vsnprintf error"); |
---|
596 | n = 0; |
---|
597 | } else if (n >= (int) buflen) { |
---|
598 | cry(conn, "truncating vsnprintf buffer: [%.*s]", |
---|
599 | n > 200 ? 200 : n, buf); |
---|
600 | n = (int) buflen - 1; |
---|
601 | } |
---|
602 | buf[n] = '\0'; |
---|
603 | |
---|
604 | return (n); |
---|
605 | } |
---|
606 | |
---|
607 | static int |
---|
608 | mg_snprintf(struct mg_connection *conn, |
---|
609 | char *buf, size_t buflen, const char *fmt, ...) |
---|
610 | { |
---|
611 | va_list ap; |
---|
612 | int n; |
---|
613 | |
---|
614 | va_start(ap, fmt); |
---|
615 | n = mg_vsnprintf(conn, buf, buflen, fmt, ap); |
---|
616 | va_end(ap); |
---|
617 | |
---|
618 | return (n); |
---|
619 | } |
---|
620 | |
---|
621 | /* |
---|
622 | * Convert string representing a boolean value to a boolean value |
---|
623 | */ |
---|
624 | static bool_t |
---|
625 | is_true(const char *str) |
---|
626 | { |
---|
627 | static const char *trues[] = {"1", "yes", "true", "ja", NULL}; |
---|
628 | int i; |
---|
629 | |
---|
630 | for (i = 0; trues[i] != NULL; i++) |
---|
631 | if (str != NULL && mg_strcasecmp(str, trues[i]) == 0) |
---|
632 | return (TRUE); |
---|
633 | |
---|
634 | return (FALSE); |
---|
635 | } |
---|
636 | |
---|
637 | /* |
---|
638 | * Skip the characters until one of the delimiters characters found. |
---|
639 | * 0-terminate resulting word. Skip the rest of the delimiters if any. |
---|
640 | * Advance pointer to buffer to the next word. Return found 0-terminated word. |
---|
641 | */ |
---|
642 | static char * |
---|
643 | skip(char **buf, const char *delimiters) |
---|
644 | { |
---|
645 | char *p, *begin_word, *end_word, *end_delimiters; |
---|
646 | |
---|
647 | begin_word = *buf; |
---|
648 | end_word = begin_word + strcspn(begin_word, delimiters); |
---|
649 | end_delimiters = end_word + strspn(end_word, delimiters); |
---|
650 | |
---|
651 | for (p = end_word; p < end_delimiters; p++) |
---|
652 | *p = '\0'; |
---|
653 | |
---|
654 | *buf = end_delimiters; |
---|
655 | |
---|
656 | return (begin_word); |
---|
657 | } |
---|
658 | |
---|
659 | /* |
---|
660 | * Return HTTP header value, or NULL if not found. |
---|
661 | */ |
---|
662 | static const char * |
---|
663 | get_header(const struct mg_request_info *ri, const char *name) |
---|
664 | { |
---|
665 | int i; |
---|
666 | |
---|
667 | for (i = 0; i < ri->num_headers; i++) |
---|
668 | if (!mg_strcasecmp(name, ri->http_headers[i].name)) |
---|
669 | return (ri->http_headers[i].value); |
---|
670 | |
---|
671 | return (NULL); |
---|
672 | } |
---|
673 | |
---|
674 | const char * |
---|
675 | mg_get_header(const struct mg_connection *conn, const char *name) |
---|
676 | { |
---|
677 | return (get_header(&conn->request_info, name)); |
---|
678 | } |
---|
679 | |
---|
680 | /* |
---|
681 | * A helper function for traversing comma separated list of values. |
---|
682 | * It returns a list pointer shifted to the next value, of NULL if the end |
---|
683 | * of the list found. |
---|
684 | * Value is stored in val vector. If value has form "x=y", then eq_val |
---|
685 | * vector is initialized to point to the "y" part, and val vector length |
---|
686 | * is adjusted to point only to "x". |
---|
687 | */ |
---|
688 | static const char * |
---|
689 | next_option(const char *list, struct vec *val, struct vec *eq_val) |
---|
690 | { |
---|
691 | if (list == NULL || *list == '\0') { |
---|
692 | /* End of the list */ |
---|
693 | list = NULL; |
---|
694 | } else { |
---|
695 | val->ptr = list; |
---|
696 | if ((list = strchr(val->ptr, ',')) != NULL) { |
---|
697 | /* Comma found. Store length and shift the list ptr */ |
---|
698 | val->len = list - val->ptr; |
---|
699 | list++; |
---|
700 | } else { |
---|
701 | /* This value is the last one */ |
---|
702 | list = val->ptr + strlen(val->ptr); |
---|
703 | val->len = list - val->ptr; |
---|
704 | } |
---|
705 | |
---|
706 | if (eq_val != NULL) { |
---|
707 | /* |
---|
708 | * Value has form "x=y", adjust pointers and lengths |
---|
709 | * so that val points to "x", and eq_val points to "y". |
---|
710 | */ |
---|
711 | eq_val->len = 0; |
---|
712 | eq_val->ptr = memchr(val->ptr, '=', val->len); |
---|
713 | if (eq_val->ptr != NULL) { |
---|
714 | eq_val->ptr++; /* Skip over '=' character */ |
---|
715 | eq_val->len = val->ptr + val->len - eq_val->ptr; |
---|
716 | val->len = (eq_val->ptr - val->ptr) - 1; |
---|
717 | } |
---|
718 | } |
---|
719 | } |
---|
720 | |
---|
721 | return (list); |
---|
722 | } |
---|
723 | |
---|
724 | #if !(defined(NO_CGI) && defined(NO_SSI)) |
---|
725 | /* |
---|
726 | * Verify that given file has certain extension |
---|
727 | */ |
---|
728 | static bool_t |
---|
729 | match_extension(const char *path, const char *ext_list) |
---|
730 | { |
---|
731 | struct vec ext_vec; |
---|
732 | size_t path_len; |
---|
733 | |
---|
734 | path_len = strlen(path); |
---|
735 | |
---|
736 | while ((ext_list = next_option(ext_list, &ext_vec, NULL)) != NULL) |
---|
737 | if (ext_vec.len < path_len && |
---|
738 | mg_strncasecmp(path + path_len - ext_vec.len, |
---|
739 | ext_vec.ptr, ext_vec.len) == 0) |
---|
740 | return (TRUE); |
---|
741 | |
---|
742 | return (FALSE); |
---|
743 | } |
---|
744 | #endif /* !(NO_CGI && NO_SSI) */ |
---|
745 | |
---|
746 | /* |
---|
747 | * Return TRUE if "uri" matches "regexp". |
---|
748 | * '*' in the regexp means zero or more characters. |
---|
749 | */ |
---|
750 | static bool_t |
---|
751 | match_regex(const char *uri, const char *regexp) |
---|
752 | { |
---|
753 | if (*regexp == '\0') |
---|
754 | return (*uri == '\0'); |
---|
755 | |
---|
756 | if (*regexp == '*') |
---|
757 | do { |
---|
758 | if (match_regex(uri, regexp + 1)) |
---|
759 | return (TRUE); |
---|
760 | } while (*uri++ != '\0'); |
---|
761 | |
---|
762 | if (*uri != '\0' && *regexp == *uri) |
---|
763 | return (match_regex(uri + 1, regexp + 1)); |
---|
764 | |
---|
765 | return (FALSE); |
---|
766 | } |
---|
767 | |
---|
768 | static const struct callback * |
---|
769 | find_callback(struct mg_context *ctx, bool_t is_auth, |
---|
770 | const char *uri, int status_code) |
---|
771 | { |
---|
772 | const struct callback *cb, *found; |
---|
773 | int i; |
---|
774 | |
---|
775 | found = NULL; |
---|
776 | pthread_mutex_lock(&ctx->bind_mutex); |
---|
777 | for (i = 0; i < ctx->num_callbacks; i++) { |
---|
778 | cb = ctx->callbacks + i; |
---|
779 | if ((uri != NULL && cb->uri_regex != NULL && |
---|
780 | ((is_auth && cb->is_auth) || (!is_auth && !cb->is_auth)) && |
---|
781 | match_regex(uri, cb->uri_regex)) || (uri == NULL && |
---|
782 | (cb->status_code == 0 || |
---|
783 | cb->status_code == status_code))) { |
---|
784 | found = cb; |
---|
785 | break; |
---|
786 | } |
---|
787 | } |
---|
788 | pthread_mutex_unlock(&ctx->bind_mutex); |
---|
789 | |
---|
790 | return (found); |
---|
791 | } |
---|
792 | |
---|
793 | /* |
---|
794 | * For use by external application. This sets custom logging function. |
---|
795 | */ |
---|
796 | void |
---|
797 | mg_set_log_callback(struct mg_context *ctx, mg_callback_t log_callback) |
---|
798 | { |
---|
799 | /* If NULL is specified as a callback, revert back to the default */ |
---|
800 | if (log_callback == NULL) |
---|
801 | ctx->log_callback = &builtin_error_log; |
---|
802 | else |
---|
803 | ctx->log_callback = log_callback; |
---|
804 | } |
---|
805 | |
---|
806 | /* |
---|
807 | * Send error message back to the client. |
---|
808 | */ |
---|
809 | static void |
---|
810 | send_error(struct mg_connection *conn, int status, const char *reason, |
---|
811 | const char *fmt, ...) |
---|
812 | { |
---|
813 | const struct callback *cb; |
---|
814 | char buf[BUFSIZ]; |
---|
815 | va_list ap; |
---|
816 | int len; |
---|
817 | |
---|
818 | conn->request_info.status_code = status; |
---|
819 | |
---|
820 | /* If error handler is set, call it. Otherwise, send error message */ |
---|
821 | if ((cb = find_callback(conn->ctx, FALSE, NULL, status)) != NULL) { |
---|
822 | cb->func(conn, &conn->request_info, cb->user_data); |
---|
823 | } else { |
---|
824 | buf[0] = '\0'; |
---|
825 | len = 0; |
---|
826 | |
---|
827 | /* Errors 1xx, 204 and 304 MUST NOT send a body */ |
---|
828 | if (status > 199 && status != 204 && status != 304) { |
---|
829 | len = mg_snprintf(conn, buf, sizeof(buf), |
---|
830 | "Error %d: %s\n", status, reason); |
---|
831 | cry(conn, "%s", buf); |
---|
832 | |
---|
833 | va_start(ap, fmt); |
---|
834 | len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, |
---|
835 | fmt, ap); |
---|
836 | va_end(ap); |
---|
837 | conn->num_bytes_sent = len; |
---|
838 | } |
---|
839 | |
---|
840 | (void) mg_printf(conn, |
---|
841 | "HTTP/1.1 %d %s\r\n" |
---|
842 | "Content-Type: text/plain\r\n" |
---|
843 | "Content-Length: %d\r\n" |
---|
844 | "Connection: close\r\n" |
---|
845 | "\r\n%s", status, reason, len, buf); |
---|
846 | } |
---|
847 | } |
---|
848 | |
---|
849 | #ifdef _WIN32 |
---|
850 | static int |
---|
851 | pthread_mutex_init(pthread_mutex_t *mutex, void *unused) |
---|
852 | { |
---|
853 | unused = NULL; |
---|
854 | *mutex = CreateMutex(NULL, FALSE, NULL); |
---|
855 | return (*mutex == NULL ? -1 : 0); |
---|
856 | } |
---|
857 | |
---|
858 | static int |
---|
859 | pthread_mutex_destroy(pthread_mutex_t *mutex) |
---|
860 | { |
---|
861 | return (CloseHandle(*mutex) == 0 ? -1 : 0); |
---|
862 | } |
---|
863 | |
---|
864 | static int |
---|
865 | pthread_mutex_lock(pthread_mutex_t *mutex) |
---|
866 | { |
---|
867 | return (WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1); |
---|
868 | } |
---|
869 | |
---|
870 | static int |
---|
871 | pthread_mutex_unlock(pthread_mutex_t *mutex) |
---|
872 | { |
---|
873 | return (ReleaseMutex(*mutex) == 0 ? -1 : 0); |
---|
874 | } |
---|
875 | |
---|
876 | static int |
---|
877 | pthread_cond_init(pthread_cond_t *cv, const void *unused) |
---|
878 | { |
---|
879 | unused = NULL; |
---|
880 | *cv = CreateEvent(NULL, FALSE, FALSE, NULL); |
---|
881 | return (*cv == NULL ? -1 : 0); |
---|
882 | } |
---|
883 | |
---|
884 | static int |
---|
885 | pthread_cond_timedwait(pthread_cond_t *cv, pthread_mutex_t *mutex, |
---|
886 | const struct timespec *ts) |
---|
887 | { |
---|
888 | DWORD status; |
---|
889 | DWORD msec = INFINITE; |
---|
890 | time_t now; |
---|
891 | |
---|
892 | if (ts != NULL) { |
---|
893 | now = time(NULL); |
---|
894 | msec = 1000 * (now > ts->tv_sec ? 0 : ts->tv_sec - now); |
---|
895 | } |
---|
896 | |
---|
897 | (void) ReleaseMutex(*mutex); |
---|
898 | status = WaitForSingleObject(*cv, msec); |
---|
899 | (void) WaitForSingleObject(*mutex, INFINITE); |
---|
900 | |
---|
901 | return (status == WAIT_OBJECT_0 ? 0 : -1); |
---|
902 | } |
---|
903 | |
---|
904 | static int |
---|
905 | pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) |
---|
906 | { |
---|
907 | return (pthread_cond_timedwait(cv, mutex, NULL)); |
---|
908 | } |
---|
909 | |
---|
910 | static int |
---|
911 | pthread_cond_signal(pthread_cond_t *cv) |
---|
912 | { |
---|
913 | return (SetEvent(*cv) == 0 ? -1 : 0); |
---|
914 | } |
---|
915 | |
---|
916 | static int |
---|
917 | pthread_cond_destroy(pthread_cond_t *cv) |
---|
918 | { |
---|
919 | return (CloseHandle(*cv) == 0 ? -1 : 0); |
---|
920 | } |
---|
921 | |
---|
922 | static pthread_t |
---|
923 | pthread_self(void) |
---|
924 | { |
---|
925 | return (GetCurrentThreadId()); |
---|
926 | } |
---|
927 | |
---|
928 | /* |
---|
929 | * Change all slashes to backslashes. It is Windows. |
---|
930 | */ |
---|
931 | static void |
---|
932 | fix_directory_separators(char *path) |
---|
933 | { |
---|
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, \\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 | /* |
---|
948 | * Encode 'path' which is assumed UTF-8 string, into UNICODE string. |
---|
949 | * wbuf and wbuf_len is a target buffer and its length. |
---|
950 | */ |
---|
951 | static void |
---|
952 | to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) |
---|
953 | { |
---|
954 | char buf[FILENAME_MAX], *p; |
---|
955 | |
---|
956 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
957 | fix_directory_separators(buf); |
---|
958 | |
---|
959 | /* Point p to the end of the file name */ |
---|
960 | p = buf + strlen(buf) - 1; |
---|
961 | |
---|
962 | /* Trim trailing backslash character */ |
---|
963 | while (p > buf && *p == '\\' && p[-1] != ':') |
---|
964 | *p-- = '\0'; |
---|
965 | |
---|
966 | /* |
---|
967 | * Protect from CGI code disclosure. |
---|
968 | * This is very nasty hole. Windows happily opens files with |
---|
969 | * some garbage in the end of file name. So fopen("a.cgi ", "r") |
---|
970 | * actually opens "a.cgi", and does not return an error! |
---|
971 | */ |
---|
972 | if (*p == 0x20 || /* No space at the end */ |
---|
973 | (*p == 0x2e && p > buf) || /* No '.' but allow '.' as full path */ |
---|
974 | *p == 0x2b || /* No '+' */ |
---|
975 | (*p & ~0x7f)) { /* And generally no non-ascii chars */ |
---|
976 | (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf); |
---|
977 | buf[0] = '\0'; |
---|
978 | } |
---|
979 | |
---|
980 | (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); |
---|
981 | } |
---|
982 | |
---|
983 | #if defined(_WIN32_WCE) |
---|
984 | |
---|
985 | static time_t |
---|
986 | time(time_t *ptime) |
---|
987 | { |
---|
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 | return (t); |
---|
1000 | } |
---|
1001 | |
---|
1002 | static time_t |
---|
1003 | mktime(struct tm *ptm) |
---|
1004 | { |
---|
1005 | SYSTEMTIME st; |
---|
1006 | FILETIME ft, lft; |
---|
1007 | |
---|
1008 | st.wYear = ptm->tm_year + 1900; |
---|
1009 | st.wMonth = ptm->tm_mon + 1; |
---|
1010 | st.wDay = ptm->tm_mday; |
---|
1011 | st.wHour = ptm->tm_hour; |
---|
1012 | st.wMinute = ptm->tm_min; |
---|
1013 | st.wSecond = ptm->tm_sec; |
---|
1014 | st.wMilliseconds = 0; |
---|
1015 | |
---|
1016 | SystemTimeToFileTime(&st, &ft); |
---|
1017 | LocalFileTimeToFileTime(&ft, &lft); |
---|
1018 | return (time_t)((MAKEUQUAD(lft.dwLowDateTime, lft.dwHighDateTime) - |
---|
1019 | EPOCH_DIFF) / RATE_DIFF); |
---|
1020 | } |
---|
1021 | |
---|
1022 | static struct tm * |
---|
1023 | localtime(const time_t *ptime, struct tm *ptm) |
---|
1024 | { |
---|
1025 | int64_t t = ((int64_t)*ptime) * RATE_DIFF + EPOCH_DIFF; |
---|
1026 | FILETIME ft, lft; |
---|
1027 | SYSTEMTIME st; |
---|
1028 | TIME_ZONE_INFORMATION tzinfo; |
---|
1029 | |
---|
1030 | if (ptm == NULL) |
---|
1031 | return NULL; |
---|
1032 | |
---|
1033 | * (int64_t *) &ft = t; |
---|
1034 | FileTimeToLocalFileTime(&ft, &lft); |
---|
1035 | FileTimeToSystemTime(&lft, &st); |
---|
1036 | ptm->tm_year = st.wYear - 1900; |
---|
1037 | ptm->tm_mon = st.wMonth - 1; |
---|
1038 | ptm->tm_wday = st.wDayOfWeek; |
---|
1039 | ptm->tm_mday = st.wDay; |
---|
1040 | ptm->tm_hour = st.wHour; |
---|
1041 | ptm->tm_min = st.wMinute; |
---|
1042 | ptm->tm_sec = st.wSecond; |
---|
1043 | ptm->tm_yday = 0; // hope nobody uses this |
---|
1044 | ptm->tm_isdst = ((GetTimeZoneInformation(&tzinfo) == |
---|
1045 | TIME_ZONE_ID_DAYLIGHT) ? 1 : 0); |
---|
1046 | |
---|
1047 | return ptm; |
---|
1048 | } |
---|
1049 | |
---|
1050 | static size_t |
---|
1051 | strftime(char *dst, size_t dst_size, const char *fmt, const struct tm *tm) |
---|
1052 | { |
---|
1053 | (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); |
---|
1054 | return (0); |
---|
1055 | } |
---|
1056 | #endif |
---|
1057 | |
---|
1058 | static int |
---|
1059 | mg_rename(const char* oldname, const char* newname) |
---|
1060 | { |
---|
1061 | wchar_t woldbuf[FILENAME_MAX]; |
---|
1062 | wchar_t wnewbuf[FILENAME_MAX]; |
---|
1063 | |
---|
1064 | to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf)); |
---|
1065 | to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf)); |
---|
1066 | |
---|
1067 | return (MoveFileW(woldbuf, wnewbuf) ? 0 : -1); |
---|
1068 | } |
---|
1069 | |
---|
1070 | |
---|
1071 | static FILE * |
---|
1072 | mg_fopen(const char *path, const char *mode) |
---|
1073 | { |
---|
1074 | wchar_t wbuf[FILENAME_MAX], wmode[20]; |
---|
1075 | |
---|
1076 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1077 | MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); |
---|
1078 | |
---|
1079 | return (_wfopen(wbuf, wmode)); |
---|
1080 | } |
---|
1081 | |
---|
1082 | static int |
---|
1083 | mg_stat(const char *path, struct mgstat *stp) |
---|
1084 | { |
---|
1085 | int ok = -1; /* Error */ |
---|
1086 | wchar_t wbuf[FILENAME_MAX]; |
---|
1087 | WIN32_FILE_ATTRIBUTE_DATA info; |
---|
1088 | |
---|
1089 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1090 | |
---|
1091 | if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { |
---|
1092 | stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); |
---|
1093 | stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime, |
---|
1094 | info.ftLastWriteTime.dwHighDateTime); |
---|
1095 | stp->is_directory = |
---|
1096 | info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; |
---|
1097 | ok = 0; /* Success */ |
---|
1098 | } |
---|
1099 | |
---|
1100 | return (ok); |
---|
1101 | } |
---|
1102 | |
---|
1103 | static int |
---|
1104 | mg_remove(const char *path) |
---|
1105 | { |
---|
1106 | wchar_t wbuf[FILENAME_MAX]; |
---|
1107 | |
---|
1108 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
1109 | |
---|
1110 | return (DeleteFileW(wbuf) ? 0 : -1); |
---|
1111 | } |
---|
1112 | |
---|
1113 | static int |
---|
1114 | mg_mkdir(const char *path, int mode) |
---|
1115 | { |
---|
1116 | char buf[FILENAME_MAX]; |
---|
1117 | wchar_t wbuf[FILENAME_MAX]; |
---|
1118 | |
---|
1119 | mode = 0; /* Unused */ |
---|
1120 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
1121 | fix_directory_separators(buf); |
---|
1122 | |
---|
1123 | (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf)); |
---|
1124 | |
---|
1125 | return (CreateDirectoryW(wbuf, NULL) ? 0 : -1); |
---|
1126 | } |
---|
1127 | |
---|
1128 | /* |
---|
1129 | * Implementation of POSIX opendir/closedir/readdir for Windows. |
---|
1130 | */ |
---|
1131 | static DIR * |
---|
1132 | opendir(const char *name) |
---|
1133 | { |
---|
1134 | DIR *dir = NULL; |
---|
1135 | wchar_t wpath[FILENAME_MAX]; |
---|
1136 | DWORD attrs; |
---|
1137 | |
---|
1138 | if (name == NULL) { |
---|
1139 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1140 | } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { |
---|
1141 | SetLastError(ERROR_NOT_ENOUGH_MEMORY); |
---|
1142 | } else { |
---|
1143 | to_unicode(name, wpath, ARRAY_SIZE(wpath)); |
---|
1144 | attrs = GetFileAttributesW(wpath); |
---|
1145 | if (attrs != 0xFFFFFFFF && |
---|
1146 | ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { |
---|
1147 | (void) wcscat(wpath, L"\\*"); |
---|
1148 | dir->handle = FindFirstFileW(wpath, &dir->info); |
---|
1149 | dir->result.d_name[0] = '\0'; |
---|
1150 | } else { |
---|
1151 | free(dir); |
---|
1152 | dir = NULL; |
---|
1153 | } |
---|
1154 | } |
---|
1155 | |
---|
1156 | return (dir); |
---|
1157 | } |
---|
1158 | |
---|
1159 | static int |
---|
1160 | closedir(DIR *dir) |
---|
1161 | { |
---|
1162 | int result = 0; |
---|
1163 | |
---|
1164 | if (dir != NULL) { |
---|
1165 | if (dir->handle != INVALID_HANDLE_VALUE) |
---|
1166 | result = FindClose(dir->handle) ? 0 : -1; |
---|
1167 | |
---|
1168 | free(dir); |
---|
1169 | } else { |
---|
1170 | result = -1; |
---|
1171 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1172 | } |
---|
1173 | |
---|
1174 | return (result); |
---|
1175 | } |
---|
1176 | |
---|
1177 | struct dirent * |
---|
1178 | readdir(DIR *dir) |
---|
1179 | { |
---|
1180 | struct dirent *result = 0; |
---|
1181 | |
---|
1182 | if (dir) { |
---|
1183 | if (dir->handle != INVALID_HANDLE_VALUE) { |
---|
1184 | result = &dir->result; |
---|
1185 | (void) WideCharToMultiByte(CP_UTF8, 0, |
---|
1186 | dir->info.cFileName, -1, result->d_name, |
---|
1187 | sizeof(result->d_name), NULL, NULL); |
---|
1188 | |
---|
1189 | if (!FindNextFileW(dir->handle, &dir->info)) { |
---|
1190 | (void) FindClose(dir->handle); |
---|
1191 | dir->handle = INVALID_HANDLE_VALUE; |
---|
1192 | } |
---|
1193 | |
---|
1194 | } else { |
---|
1195 | SetLastError(ERROR_FILE_NOT_FOUND); |
---|
1196 | } |
---|
1197 | } else { |
---|
1198 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
1199 | } |
---|
1200 | |
---|
1201 | return (result); |
---|
1202 | } |
---|
1203 | |
---|
1204 | #define set_close_on_exec(fd) /* No FD_CLOEXEC on Windows */ |
---|
1205 | |
---|
1206 | static int |
---|
1207 | start_thread(struct mg_context *ctx, mg_thread_func_t func, void *param) |
---|
1208 | { |
---|
1209 | HANDLE hThread; |
---|
1210 | |
---|
1211 | ctx = NULL; /* Unused */ |
---|
1212 | |
---|
1213 | hThread = CreateThread(NULL, 0, |
---|
1214 | (LPTHREAD_START_ROUTINE) func, param, 0, NULL); |
---|
1215 | |
---|
1216 | if (hThread != NULL) |
---|
1217 | (void) CloseHandle(hThread); |
---|
1218 | |
---|
1219 | return (hThread == NULL ? -1 : 0); |
---|
1220 | } |
---|
1221 | |
---|
1222 | static HANDLE |
---|
1223 | dlopen(const char *dll_name, int flags) |
---|
1224 | { |
---|
1225 | wchar_t wbuf[FILENAME_MAX]; |
---|
1226 | |
---|
1227 | flags = 0; /* Unused */ |
---|
1228 | to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); |
---|
1229 | |
---|
1230 | return (LoadLibraryW(wbuf)); |
---|
1231 | } |
---|
1232 | |
---|
1233 | #if !defined(NO_CGI) |
---|
1234 | static int |
---|
1235 | kill(pid_t pid, int sig_num) |
---|
1236 | { |
---|
1237 | (void) TerminateProcess(pid, sig_num); |
---|
1238 | (void) CloseHandle(pid); |
---|
1239 | return (0); |
---|
1240 | } |
---|
1241 | |
---|
1242 | static pid_t |
---|
1243 | spawn_process(struct mg_connection *conn, const char *prog, char *envblk, |
---|
1244 | char *envp[], int fd_stdin, int fd_stdout, const char *dir) |
---|
1245 | { |
---|
1246 | HANDLE me; |
---|
1247 | char *p, *interp, cmdline[FILENAME_MAX], line[FILENAME_MAX]; |
---|
1248 | FILE *fp; |
---|
1249 | STARTUPINFOA si; |
---|
1250 | PROCESS_INFORMATION pi; |
---|
1251 | |
---|
1252 | envp = NULL; /* Unused */ |
---|
1253 | |
---|
1254 | (void) memset(&si, 0, sizeof(si)); |
---|
1255 | (void) memset(&pi, 0, sizeof(pi)); |
---|
1256 | |
---|
1257 | /* XXX redirect CGI errors to the error log file */ |
---|
1258 | si.cb = sizeof(si); |
---|
1259 | si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
---|
1260 | si.wShowWindow = SW_HIDE; |
---|
1261 | |
---|
1262 | me = GetCurrentProcess(); |
---|
1263 | (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me, |
---|
1264 | &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
1265 | (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me, |
---|
1266 | &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
1267 | |
---|
1268 | /* If CGI file is a script, try to read the interpreter line */ |
---|
1269 | interp = conn->ctx->options[OPT_CGI_INTERPRETER]; |
---|
1270 | if (interp == NULL) { |
---|
1271 | line[2] = '\0'; |
---|
1272 | (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", |
---|
1273 | dir, DIRSEP, prog); |
---|
1274 | if ((fp = fopen(cmdline, "r")) != NULL) { |
---|
1275 | (void) fgets(line, sizeof(line), fp); |
---|
1276 | if (memcmp(line, "#!", 2) != 0) |
---|
1277 | line[2] = '\0'; |
---|
1278 | /* Trim whitespaces from interpreter name */ |
---|
1279 | for (p = &line[strlen(line) - 1]; p > line && |
---|
1280 | isspace(*p); p--) |
---|
1281 | *p = '\0'; |
---|
1282 | (void) fclose(fp); |
---|
1283 | } |
---|
1284 | interp = line + 2; |
---|
1285 | } |
---|
1286 | |
---|
1287 | if ((p = (char *) strrchr(prog, '/')) != NULL) |
---|
1288 | prog = p + 1; |
---|
1289 | |
---|
1290 | (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s", |
---|
1291 | interp, interp[0] == '\0' ? "" : " ", prog); |
---|
1292 | |
---|
1293 | (void) mg_snprintf(conn, line, sizeof(line), "%s", dir); |
---|
1294 | fix_directory_separators(line); |
---|
1295 | |
---|
1296 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: Running [%s]", __func__, cmdline)); |
---|
1297 | if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, |
---|
1298 | CREATE_NEW_PROCESS_GROUP, envblk, line, &si, &pi) == 0) { |
---|
1299 | cry(conn, "%s: CreateProcess(%s): %d", |
---|
1300 | __func__, cmdline, ERRNO); |
---|
1301 | pi.hProcess = (pid_t) -1; |
---|
1302 | } else { |
---|
1303 | (void) close(fd_stdin); |
---|
1304 | (void) close(fd_stdout); |
---|
1305 | } |
---|
1306 | |
---|
1307 | (void) CloseHandle(si.hStdOutput); |
---|
1308 | (void) CloseHandle(si.hStdInput); |
---|
1309 | (void) CloseHandle(pi.hThread); |
---|
1310 | |
---|
1311 | return ((pid_t) pi.hProcess); |
---|
1312 | } |
---|
1313 | |
---|
1314 | static int |
---|
1315 | pipe(int *fds) |
---|
1316 | { |
---|
1317 | return (_pipe(fds, BUFSIZ, _O_BINARY)); |
---|
1318 | } |
---|
1319 | #endif /* !NO_CGI */ |
---|
1320 | |
---|
1321 | static int |
---|
1322 | set_non_blocking_mode(struct mg_connection *conn, SOCKET sock) |
---|
1323 | { |
---|
1324 | unsigned long on = 1; |
---|
1325 | |
---|
1326 | conn = NULL; /* unused */ |
---|
1327 | return (ioctlsocket(sock, FIONBIO, &on)); |
---|
1328 | } |
---|
1329 | |
---|
1330 | #else |
---|
1331 | |
---|
1332 | static int |
---|
1333 | mg_stat(const char *path, struct mgstat *stp) |
---|
1334 | { |
---|
1335 | struct stat st; |
---|
1336 | int ok; |
---|
1337 | |
---|
1338 | if (stat(path, &st) == 0) { |
---|
1339 | ok = 0; |
---|
1340 | stp->size = st.st_size; |
---|
1341 | stp->mtime = st.st_mtime; |
---|
1342 | stp->is_directory = S_ISDIR(st.st_mode); |
---|
1343 | } else { |
---|
1344 | ok = -1; |
---|
1345 | } |
---|
1346 | |
---|
1347 | return (ok); |
---|
1348 | } |
---|
1349 | |
---|
1350 | static void |
---|
1351 | set_close_on_exec(int fd) |
---|
1352 | { |
---|
1353 | (void) fcntl(fd, F_SETFD, FD_CLOEXEC); |
---|
1354 | } |
---|
1355 | |
---|
1356 | static int |
---|
1357 | start_thread(struct mg_context *ctx, mg_thread_func_t func, void *param) |
---|
1358 | { |
---|
1359 | pthread_t thread_id; |
---|
1360 | pthread_attr_t attr; |
---|
1361 | int retval; |
---|
1362 | |
---|
1363 | (void) pthread_attr_init(&attr); |
---|
1364 | (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
---|
1365 | |
---|
1366 | if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) |
---|
1367 | cry(fc(ctx), "%s: %s", __func__, strerror(retval)); |
---|
1368 | |
---|
1369 | return (retval); |
---|
1370 | } |
---|
1371 | |
---|
1372 | #ifndef NO_CGI |
---|
1373 | static pid_t |
---|
1374 | spawn_process(struct mg_connection *conn, const char *prog, char *envblk, |
---|
1375 | char *envp[], int fd_stdin, int fd_stdout, const char *dir) |
---|
1376 | { |
---|
1377 | pid_t pid; |
---|
1378 | const char *interp; |
---|
1379 | |
---|
1380 | envblk = NULL; /* unused */ |
---|
1381 | |
---|
1382 | if ((pid = fork()) == -1) { |
---|
1383 | /* Parent */ |
---|
1384 | send_error(conn, 500, http_500_error, |
---|
1385 | "fork(): %s", strerror(ERRNO)); |
---|
1386 | } else if (pid == 0) { |
---|
1387 | /* Child */ |
---|
1388 | if (chdir(dir) != 0) { |
---|
1389 | cry(conn, "%s: chdir(%s): %s", |
---|
1390 | __func__, dir, strerror(ERRNO)); |
---|
1391 | } else if (dup2(fd_stdin, 0) == -1) { |
---|
1392 | cry(conn, "%s: dup2(stdin, %d): %s", |
---|
1393 | __func__, fd_stdin, strerror(ERRNO)); |
---|
1394 | } else if (dup2(fd_stdout, 1) == -1) { |
---|
1395 | cry(conn, "%s: dup2(stdout, %d): %s", |
---|
1396 | __func__, fd_stdout, strerror(ERRNO)); |
---|
1397 | } else { |
---|
1398 | /* If error file is specified, send errors there */ |
---|
1399 | if (conn->ctx->error_log != NULL) |
---|
1400 | (void) dup2(fileno(conn->ctx->error_log), 2); |
---|
1401 | |
---|
1402 | (void) close(fd_stdin); |
---|
1403 | (void) close(fd_stdout); |
---|
1404 | |
---|
1405 | /* Execute CGI program */ |
---|
1406 | interp = conn->ctx->options[OPT_CGI_INTERPRETER]; |
---|
1407 | if (interp == NULL) { |
---|
1408 | (void) execle(prog, prog, NULL, envp); |
---|
1409 | cry(conn, "%s: execle(%s): %s", |
---|
1410 | __func__, prog, strerror(ERRNO)); |
---|
1411 | } else { |
---|
1412 | (void) execle(interp, interp, prog, NULL, envp); |
---|
1413 | cry(conn, "%s: execle(%s %s): %s", |
---|
1414 | __func__, interp, prog, strerror(ERRNO)); |
---|
1415 | } |
---|
1416 | } |
---|
1417 | exit(EXIT_FAILURE); |
---|
1418 | } else { |
---|
1419 | /* Parent. Close stdio descriptors */ |
---|
1420 | (void) close(fd_stdin); |
---|
1421 | (void) close(fd_stdout); |
---|
1422 | } |
---|
1423 | |
---|
1424 | return (pid); |
---|
1425 | } |
---|
1426 | #endif /* !NO_CGI */ |
---|
1427 | |
---|
1428 | static int |
---|
1429 | set_non_blocking_mode(struct mg_connection *conn, SOCKET sock) |
---|
1430 | { |
---|
1431 | int flags, ok = -1; |
---|
1432 | |
---|
1433 | if ((flags = fcntl(sock, F_GETFL, 0)) == -1) { |
---|
1434 | cry(conn, "%s: fcntl(F_GETFL): %d", __func__, ERRNO); |
---|
1435 | } else if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) != 0) { |
---|
1436 | cry(conn, "%s: fcntl(F_SETFL): %d", __func__, ERRNO); |
---|
1437 | } else { |
---|
1438 | ok = 0; /* Success */ |
---|
1439 | } |
---|
1440 | |
---|
1441 | return (ok); |
---|
1442 | } |
---|
1443 | #endif /* _WIN32 */ |
---|
1444 | |
---|
1445 | static void |
---|
1446 | lock_option(struct mg_context *ctx, int opt_index) |
---|
1447 | { |
---|
1448 | if (pthread_mutex_lock(&ctx->opt_mutex[opt_index]) != 0) |
---|
1449 | cry(fc(ctx), "pthread_mutex_lock: %s", strerror(ERRNO)); |
---|
1450 | } |
---|
1451 | |
---|
1452 | static void |
---|
1453 | unlock_option(struct mg_context *ctx, int opt_index) |
---|
1454 | { |
---|
1455 | if (pthread_mutex_unlock(&ctx->opt_mutex[opt_index]) != 0) |
---|
1456 | cry(fc(ctx), "pthread_mutex_unlock: %s", strerror(ERRNO)); |
---|
1457 | } |
---|
1458 | |
---|
1459 | /* |
---|
1460 | * Write data to the IO channel - opened file descriptor, socket or SSL |
---|
1461 | * descriptor. Return number of bytes written. |
---|
1462 | */ |
---|
1463 | static int64_t |
---|
1464 | push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, int64_t len) |
---|
1465 | { |
---|
1466 | int64_t sent; |
---|
1467 | int n, k; |
---|
1468 | |
---|
1469 | sent = 0; |
---|
1470 | while (sent < len) { |
---|
1471 | |
---|
1472 | /* How many bytes we send in this iteration */ |
---|
1473 | k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); |
---|
1474 | |
---|
1475 | if (ssl != NULL) { |
---|
1476 | n = SSL_write(ssl, buf + sent, k); |
---|
1477 | } else if (fp != NULL) { |
---|
1478 | n = fwrite(buf + sent, 1, k, fp); |
---|
1479 | if (ferror(fp)) |
---|
1480 | n = -1; |
---|
1481 | } else { |
---|
1482 | n = send(sock, buf + sent, k, 0); |
---|
1483 | } |
---|
1484 | |
---|
1485 | if (n < 0) |
---|
1486 | break; |
---|
1487 | |
---|
1488 | sent += n; |
---|
1489 | } |
---|
1490 | |
---|
1491 | return (sent); |
---|
1492 | } |
---|
1493 | |
---|
1494 | /* |
---|
1495 | * Read from IO channel - opened file descriptor, socket, or SSL descriptor. |
---|
1496 | * Return number of bytes read. |
---|
1497 | */ |
---|
1498 | static int |
---|
1499 | pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) |
---|
1500 | { |
---|
1501 | int nread; |
---|
1502 | |
---|
1503 | if (ssl != NULL) { |
---|
1504 | nread = SSL_read(ssl, buf, len); |
---|
1505 | } else if (fp != NULL) { |
---|
1506 | nread = fread(buf, 1, (size_t) len, fp); |
---|
1507 | if (ferror(fp)) |
---|
1508 | nread = -1; |
---|
1509 | } else { |
---|
1510 | nread = recv(sock, buf, (size_t) len, 0); |
---|
1511 | } |
---|
1512 | |
---|
1513 | return (nread); |
---|
1514 | } |
---|
1515 | |
---|
1516 | int |
---|
1517 | mg_write(struct mg_connection *conn, const void *buf, int len) |
---|
1518 | { |
---|
1519 | assert(len >= 0); |
---|
1520 | return ((int) push(NULL, conn->client.sock, conn->ssl, |
---|
1521 | (const char *) buf, (int64_t) len)); |
---|
1522 | } |
---|
1523 | |
---|
1524 | int |
---|
1525 | mg_printf(struct mg_connection *conn, const char *fmt, ...) |
---|
1526 | { |
---|
1527 | char buf[MAX_REQUEST_SIZE]; |
---|
1528 | int len; |
---|
1529 | va_list ap; |
---|
1530 | |
---|
1531 | va_start(ap, fmt); |
---|
1532 | len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap); |
---|
1533 | va_end(ap); |
---|
1534 | |
---|
1535 | return (mg_write(conn, buf, len)); |
---|
1536 | } |
---|
1537 | |
---|
1538 | /* |
---|
1539 | * Return content length of the request, or -1 constant if |
---|
1540 | * Content-Length header is not set. |
---|
1541 | */ |
---|
1542 | static int64_t |
---|
1543 | get_content_length(const struct mg_connection *conn) |
---|
1544 | { |
---|
1545 | const char *cl = mg_get_header(conn, "Content-Length"); |
---|
1546 | return (cl == NULL ? -1 : strtoll(cl, NULL, 10)); |
---|
1547 | } |
---|
1548 | |
---|
1549 | /* |
---|
1550 | * URL-decode input buffer into destination buffer. |
---|
1551 | * 0-terminate the destination buffer. Return the length of decoded data. |
---|
1552 | * form-url-encoded data differs from URI encoding in a way that it |
---|
1553 | * uses '+' as character for space, see RFC 1866 section 8.2.1 |
---|
1554 | * http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt |
---|
1555 | */ |
---|
1556 | static size_t |
---|
1557 | url_decode(const char *src, size_t src_len, char *dst, size_t dst_len, |
---|
1558 | bool_t is_form_url_encoded) |
---|
1559 | { |
---|
1560 | size_t i, j; |
---|
1561 | int a, b; |
---|
1562 | #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') |
---|
1563 | |
---|
1564 | for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { |
---|
1565 | if (src[i] == '%' && |
---|
1566 | isxdigit(* (unsigned char *) (src + i + 1)) && |
---|
1567 | isxdigit(* (unsigned char *) (src + i + 2))) { |
---|
1568 | a = tolower(* (unsigned char *) (src + i + 1)); |
---|
1569 | b = tolower(* (unsigned char *) (src + i + 2)); |
---|
1570 | dst[j] = ((HEXTOI(a) << 4) | HEXTOI(b)) & 0xff; |
---|
1571 | i += 2; |
---|
1572 | } else if (is_form_url_encoded && src[i] == '+') { |
---|
1573 | dst[j] = ' '; |
---|
1574 | } else { |
---|
1575 | dst[j] = src[i]; |
---|
1576 | } |
---|
1577 | } |
---|
1578 | |
---|
1579 | dst[j] = '\0'; /* Null-terminate the destination */ |
---|
1580 | |
---|
1581 | return (j); |
---|
1582 | } |
---|
1583 | |
---|
1584 | /* |
---|
1585 | * Search for a form variable in a given buffer. |
---|
1586 | * Semantic is the same as for mg_get_var(). |
---|
1587 | */ |
---|
1588 | static char * |
---|
1589 | get_var(const char *name, const char *buf, size_t buf_len) |
---|
1590 | { |
---|
1591 | const char *p, *e, *s; |
---|
1592 | char *val; |
---|
1593 | size_t var_len, len; |
---|
1594 | |
---|
1595 | var_len = strlen(name); |
---|
1596 | e = buf + buf_len; |
---|
1597 | val = NULL; |
---|
1598 | |
---|
1599 | /* buf is "var1=val1&var2=val2...". Find variable first */ |
---|
1600 | for (p = buf; p + var_len < e; p++) |
---|
1601 | if ((p == buf || p[-1] == '&') && p[var_len] == '=' && |
---|
1602 | !mg_strncasecmp(name, p, var_len)) { |
---|
1603 | |
---|
1604 | /* Point p to variable value */ |
---|
1605 | p += var_len + 1; |
---|
1606 | |
---|
1607 | /* Point s to the end of the value */ |
---|
1608 | s = (const char *) memchr(p, '&', e - p); |
---|
1609 | if (s == NULL) |
---|
1610 | s = e; |
---|
1611 | |
---|
1612 | /* Try to allocate the buffer */ |
---|
1613 | len = s - p; |
---|
1614 | if ((val = (char *) malloc(len + 1)) != NULL) |
---|
1615 | (void) url_decode(p, len, val, len + 1, TRUE); |
---|
1616 | break; |
---|
1617 | } |
---|
1618 | |
---|
1619 | return (val); |
---|
1620 | } |
---|
1621 | |
---|
1622 | /* |
---|
1623 | * Free the pointer returned by mg_get_var(). This is needed for languages |
---|
1624 | * like python, to have an ability to free allocated data without |
---|
1625 | * loading C runtime library and calling free(). |
---|
1626 | */ |
---|
1627 | void |
---|
1628 | mg_free(char *data) |
---|
1629 | { |
---|
1630 | free(data); |
---|
1631 | } |
---|
1632 | |
---|
1633 | /* |
---|
1634 | * Return form data variable. |
---|
1635 | * It can be specified in query string, or in the POST data. |
---|
1636 | * Return NULL if the variable not found, or allocated 0-terminated value. |
---|
1637 | * It is caller's responsibility to free the returned value. |
---|
1638 | */ |
---|
1639 | char * |
---|
1640 | mg_get_var(const struct mg_connection *conn, const char *name) |
---|
1641 | { |
---|
1642 | const struct mg_request_info *ri = &conn->request_info; |
---|
1643 | char *v1, *v2; |
---|
1644 | |
---|
1645 | v1 = v2 = NULL; |
---|
1646 | |
---|
1647 | /* Look in both query_string and POST data */ |
---|
1648 | if (ri->query_string != NULL) |
---|
1649 | v1 = get_var(name, ri->query_string, strlen(ri->query_string)); |
---|
1650 | if (ri->post_data_len > 0) |
---|
1651 | v2 = get_var(name, ri->post_data, ri->post_data_len); |
---|
1652 | |
---|
1653 | /* If they both have queried variable, POST data wins */ |
---|
1654 | if (v1 != NULL && v2 != NULL) |
---|
1655 | free(v1); |
---|
1656 | |
---|
1657 | return (v2 == NULL ? v1 : v2); |
---|
1658 | } |
---|
1659 | |
---|
1660 | /* |
---|
1661 | * Transform URI to the file name. |
---|
1662 | */ |
---|
1663 | static void |
---|
1664 | convert_uri_to_file_name(struct mg_connection *conn, const char *uri, |
---|
1665 | char *buf, size_t buf_len) |
---|
1666 | { |
---|
1667 | struct mg_context *ctx = conn->ctx; |
---|
1668 | struct vec uri_vec, path_vec; |
---|
1669 | const char *list; |
---|
1670 | |
---|
1671 | lock_option(ctx, OPT_ROOT); |
---|
1672 | mg_snprintf(conn, buf, buf_len, "%s%s", ctx->options[OPT_ROOT], uri); |
---|
1673 | unlock_option(ctx, OPT_ROOT); |
---|
1674 | |
---|
1675 | /* If requested URI has aliased prefix, use alternate root */ |
---|
1676 | lock_option(ctx, OPT_ALIASES); |
---|
1677 | list = ctx->options[OPT_ALIASES]; |
---|
1678 | |
---|
1679 | while ((list = next_option(list, &uri_vec, &path_vec)) != NULL) { |
---|
1680 | if (memcmp(uri, uri_vec.ptr, uri_vec.len) == 0) { |
---|
1681 | (void) mg_snprintf(conn, buf, buf_len, "%.*s%s", |
---|
1682 | path_vec.len, path_vec.ptr, uri + uri_vec.len); |
---|
1683 | break; |
---|
1684 | } |
---|
1685 | } |
---|
1686 | unlock_option(ctx, OPT_ALIASES); |
---|
1687 | |
---|
1688 | #ifdef _WIN32 |
---|
1689 | fix_directory_separators(buf); |
---|
1690 | #endif /* _WIN32 */ |
---|
1691 | |
---|
1692 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: [%s] -> [%s]", __func__, uri, buf)); |
---|
1693 | } |
---|
1694 | |
---|
1695 | /* |
---|
1696 | * Setup listening socket on given address, return socket. |
---|
1697 | * Address format: [local_ip_address:]port_number |
---|
1698 | */ |
---|
1699 | static SOCKET |
---|
1700 | mg_open_listening_port(struct mg_context *ctx, const char *str, struct usa *usa) |
---|
1701 | { |
---|
1702 | SOCKET sock; |
---|
1703 | int on = 1, a, b, c, d, port; |
---|
1704 | |
---|
1705 | /* MacOS needs that. If we do not zero it, bind() will fail. */ |
---|
1706 | (void) memset(usa, 0, sizeof(*usa)); |
---|
1707 | |
---|
1708 | if (sscanf(str, "%d.%d.%d.%d:%d", &a, &b, &c, &d, &port) == 5) { |
---|
1709 | /* IP address to bind to is specified */ |
---|
1710 | usa->u.sin.sin_addr.s_addr = |
---|
1711 | htonl((a << 24) | (b << 16) | (c << 8) | d); |
---|
1712 | } else if (sscanf(str, "%d", &port) == 1) { |
---|
1713 | /* Only port number is specified. Bind to all addresses */ |
---|
1714 | usa->u.sin.sin_addr.s_addr = htonl(INADDR_ANY); |
---|
1715 | } else { |
---|
1716 | return (INVALID_SOCKET); |
---|
1717 | } |
---|
1718 | |
---|
1719 | usa->len = sizeof(usa->u.sin); |
---|
1720 | usa->u.sin.sin_family = AF_INET; |
---|
1721 | usa->u.sin.sin_port = htons((uint16_t) port); |
---|
1722 | |
---|
1723 | if ((sock = socket(PF_INET, SOCK_STREAM, 6)) != INVALID_SOCKET && |
---|
1724 | setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
---|
1725 | (char *) &on, sizeof(on)) == 0 && |
---|
1726 | bind(sock, &usa->u.sa, usa->len) == 0 && |
---|
1727 | listen(sock, 20) == 0) { |
---|
1728 | /* Success */ |
---|
1729 | set_close_on_exec(sock); |
---|
1730 | } else { |
---|
1731 | /* Error */ |
---|
1732 | cry(fc(ctx), "%s(%d): %s", __func__, port, strerror(ERRNO)); |
---|
1733 | if (sock != INVALID_SOCKET) |
---|
1734 | (void) closesocket(sock); |
---|
1735 | sock = INVALID_SOCKET; |
---|
1736 | } |
---|
1737 | |
---|
1738 | return (sock); |
---|
1739 | } |
---|
1740 | |
---|
1741 | /* |
---|
1742 | * Check whether full request is buffered. Return: |
---|
1743 | * -1 if request is malformed |
---|
1744 | * 0 if request is not yet fully buffered |
---|
1745 | * >0 actual request length, including last \r\n\r\n |
---|
1746 | */ |
---|
1747 | static int |
---|
1748 | get_request_len(const char *buf, size_t buflen) |
---|
1749 | { |
---|
1750 | const char *s, *e; |
---|
1751 | int len = 0; |
---|
1752 | |
---|
1753 | for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) |
---|
1754 | /* Control characters are not allowed but >=128 is. */ |
---|
1755 | if (!isprint(* (unsigned char *) s) && *s != '\r' && |
---|
1756 | *s != '\n' && * (unsigned char *) s < 128) |
---|
1757 | len = -1; |
---|
1758 | else if (s[0] == '\n' && s[1] == '\n') |
---|
1759 | len = (int) (s - buf) + 2; |
---|
1760 | else if (s[0] == '\n' && &s[1] < e && |
---|
1761 | s[1] == '\r' && s[2] == '\n') |
---|
1762 | len = (int) (s - buf) + 3; |
---|
1763 | |
---|
1764 | return (len); |
---|
1765 | } |
---|
1766 | |
---|
1767 | /* |
---|
1768 | * Convert month to the month number. Return -1 on error, or month number |
---|
1769 | */ |
---|
1770 | static int |
---|
1771 | montoi(const char *s) |
---|
1772 | { |
---|
1773 | size_t i; |
---|
1774 | |
---|
1775 | for (i = 0; i < sizeof(month_names) / sizeof(month_names[0]); i++) |
---|
1776 | if (!strcmp(s, month_names[i])) |
---|
1777 | return ((int) i); |
---|
1778 | |
---|
1779 | return (-1); |
---|
1780 | } |
---|
1781 | |
---|
1782 | /* |
---|
1783 | * Parse date-time string, and return the corresponding time_t value |
---|
1784 | */ |
---|
1785 | static time_t |
---|
1786 | date_to_epoch(const char *s) |
---|
1787 | { |
---|
1788 | time_t current_time; |
---|
1789 | struct tm tm, *tmp; |
---|
1790 | char mon[32]; |
---|
1791 | int sec, min, hour, mday, month, year; |
---|
1792 | |
---|
1793 | (void) memset(&tm, 0, sizeof(tm)); |
---|
1794 | sec = min = hour = mday = month = year = 0; |
---|
1795 | |
---|
1796 | if (((sscanf(s, "%d/%3s/%d %d:%d:%d", |
---|
1797 | &mday, mon, &year, &hour, &min, &sec) == 6) || |
---|
1798 | (sscanf(s, "%d %3s %d %d:%d:%d", |
---|
1799 | &mday, mon, &year, &hour, &min, &sec) == 6) || |
---|
1800 | (sscanf(s, "%*3s, %d %3s %d %d:%d:%d", |
---|
1801 | &mday, mon, &year, &hour, &min, &sec) == 6) || |
---|
1802 | (sscanf(s, "%d-%3s-%d %d:%d:%d", |
---|
1803 | &mday, mon, &year, &hour, &min, &sec) == 6)) && |
---|
1804 | (month = montoi(mon)) != -1) { |
---|
1805 | tm.tm_mday = mday; |
---|
1806 | tm.tm_mon = month; |
---|
1807 | tm.tm_year = year; |
---|
1808 | tm.tm_hour = hour; |
---|
1809 | tm.tm_min = min; |
---|
1810 | tm.tm_sec = sec; |
---|
1811 | } |
---|
1812 | |
---|
1813 | if (tm.tm_year > 1900) |
---|
1814 | tm.tm_year -= 1900; |
---|
1815 | else if (tm.tm_year < 70) |
---|
1816 | tm.tm_year += 100; |
---|
1817 | |
---|
1818 | /* Set Daylight Saving Time field */ |
---|
1819 | current_time = time(NULL); |
---|
1820 | tmp = localtime(¤t_time); |
---|
1821 | tm.tm_isdst = tmp->tm_isdst; |
---|
1822 | |
---|
1823 | return (mktime(&tm)); |
---|
1824 | } |
---|
1825 | |
---|
1826 | /* |
---|
1827 | * Protect against directory disclosure attack by removing '..', |
---|
1828 | * excessive '/' and '\' characters |
---|
1829 | */ |
---|
1830 | static void |
---|
1831 | remove_double_dots_and_double_slashes(char *s) |
---|
1832 | { |
---|
1833 | char *p = s; |
---|
1834 | |
---|
1835 | while (*s != '\0') { |
---|
1836 | *p++ = *s++; |
---|
1837 | if (s[-1] == '/' || s[-1] == '\\') { |
---|
1838 | /* Skip all following slashes and backslashes */ |
---|
1839 | while (*s == '/' || *s == '\\') |
---|
1840 | s++; |
---|
1841 | |
---|
1842 | /* Skip all double-dots */ |
---|
1843 | while (*s == '.' && s[1] == '.') |
---|
1844 | s += 2; |
---|
1845 | } |
---|
1846 | } |
---|
1847 | *p = '\0'; |
---|
1848 | } |
---|
1849 | |
---|
1850 | /* |
---|
1851 | * Built-in mime types |
---|
1852 | */ |
---|
1853 | static const struct { |
---|
1854 | const char *extension; |
---|
1855 | size_t ext_len; |
---|
1856 | const char *mime_type; |
---|
1857 | size_t mime_type_len; |
---|
1858 | } mime_types[] = { |
---|
1859 | {".html", 5, "text/html", 9}, |
---|
1860 | {".htm", 4, "text/html", 9}, |
---|
1861 | {".shtm", 5, "text/html", 9}, |
---|
1862 | {".shtml", 6, "text/html", 9}, |
---|
1863 | {".css", 4, "text/css", 8}, |
---|
1864 | {".js", 3, "application/x-javascript", 24}, |
---|
1865 | {".ico", 4, "image/x-icon", 12}, |
---|
1866 | {".gif", 4, "image/gif", 9}, |
---|
1867 | {".jpg", 4, "image/jpeg", 10}, |
---|
1868 | {".jpeg", 5, "image/jpeg", 10}, |
---|
1869 | {".png", 4, "image/png", 9}, |
---|
1870 | {".svg", 4, "image/svg+xml", 13}, |
---|
1871 | {".torrent", 8, "application/x-bittorrent", 24}, |
---|
1872 | {".wav", 4, "audio/x-wav", 11}, |
---|
1873 | {".mp3", 4, "audio/x-mp3", 11}, |
---|
1874 | {".mid", 4, "audio/mid", 9}, |
---|
1875 | {".m3u", 4, "audio/x-mpegurl", 15}, |
---|
1876 | {".ram", 4, "audio/x-pn-realaudio", 20}, |
---|
1877 | {".xml", 4, "text/xml", 8}, |
---|
1878 | {".xslt", 5, "application/xml", 15}, |
---|
1879 | {".ra", 3, "audio/x-pn-realaudio", 20}, |
---|
1880 | {".doc", 4, "application/msword", 19}, |
---|
1881 | {".exe", 4, "application/octet-stream", 24}, |
---|
1882 | {".zip", 4, "application/x-zip-compressed", 28}, |
---|
1883 | {".xls", 4, "application/excel", 17}, |
---|
1884 | {".tgz", 4, "application/x-tar-gz", 20}, |
---|
1885 | {".tar", 4, "application/x-tar", 17}, |
---|
1886 | {".gz", 3, "application/x-gunzip", 20}, |
---|
1887 | {".arj", 4, "application/x-arj-compressed", 28}, |
---|
1888 | {".rar", 4, "application/x-arj-compressed", 28}, |
---|
1889 | {".rtf", 4, "application/rtf", 15}, |
---|
1890 | {".pdf", 4, "application/pdf", 15}, |
---|
1891 | {".swf", 4, "application/x-shockwave-flash",29}, |
---|
1892 | {".mpg", 4, "video/mpeg", 10}, |
---|
1893 | {".mpeg", 5, "video/mpeg", 10}, |
---|
1894 | {".asf", 4, "video/x-ms-asf", 14}, |
---|
1895 | {".avi", 4, "video/x-msvideo", 15}, |
---|
1896 | {".bmp", 4, "image/bmp", 9}, |
---|
1897 | {NULL, 0, NULL, 0} |
---|
1898 | }; |
---|
1899 | |
---|
1900 | /* |
---|
1901 | * Look at the "path" extension and figure what mime type it has. |
---|
1902 | * Store mime type in the vector. |
---|
1903 | */ |
---|
1904 | static void |
---|
1905 | get_mime_type(struct mg_context *ctx, const char *path, struct vec *vec) |
---|
1906 | { |
---|
1907 | struct vec ext_vec, mime_vec; |
---|
1908 | const char *list, *ext; |
---|
1909 | size_t i, path_len; |
---|
1910 | |
---|
1911 | path_len = strlen(path); |
---|
1912 | |
---|
1913 | /* |
---|
1914 | * Scan user-defined mime types first, in case user wants to |
---|
1915 | * override default mime types. |
---|
1916 | */ |
---|
1917 | lock_option(ctx, OPT_MIME_TYPES); |
---|
1918 | list = ctx->options[OPT_MIME_TYPES]; |
---|
1919 | while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { |
---|
1920 | /* ext now points to the path suffix */ |
---|
1921 | ext = path + path_len - ext_vec.len; |
---|
1922 | if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { |
---|
1923 | *vec = mime_vec; |
---|
1924 | unlock_option(ctx, OPT_MIME_TYPES); |
---|
1925 | return; |
---|
1926 | } |
---|
1927 | } |
---|
1928 | unlock_option(ctx, OPT_MIME_TYPES); |
---|
1929 | |
---|
1930 | /* Now scan built-in mime types */ |
---|
1931 | for (i = 0; mime_types[i].extension != NULL; i++) { |
---|
1932 | ext = path + (path_len - mime_types[i].ext_len); |
---|
1933 | if (path_len > mime_types[i].ext_len && |
---|
1934 | mg_strcasecmp(ext, mime_types[i].extension) == 0) { |
---|
1935 | vec->ptr = mime_types[i].mime_type; |
---|
1936 | vec->len = mime_types[i].mime_type_len; |
---|
1937 | return; |
---|
1938 | } |
---|
1939 | } |
---|
1940 | |
---|
1941 | /* Nothing found. Fall back to text/plain */ |
---|
1942 | vec->ptr = "text/plain"; |
---|
1943 | vec->len = 10; |
---|
1944 | } |
---|
1945 | |
---|
1946 | #ifndef HAVE_MD5 |
---|
1947 | typedef struct MD5Context { |
---|
1948 | uint32_t buf[4]; |
---|
1949 | uint32_t bits[2]; |
---|
1950 | unsigned char in[64]; |
---|
1951 | } MD5_CTX; |
---|
1952 | |
---|
1953 | #if __BYTE_ORDER == 1234 |
---|
1954 | #define byteReverse(buf, len) /* Nothing */ |
---|
1955 | #else |
---|
1956 | /* |
---|
1957 | * Note: this code is harmless on little-endian machines. |
---|
1958 | */ |
---|
1959 | static void |
---|
1960 | byteReverse(unsigned char *buf, unsigned longs) |
---|
1961 | { |
---|
1962 | uint32_t t; |
---|
1963 | do { |
---|
1964 | t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | |
---|
1965 | ((unsigned) buf[1] << 8 | buf[0]); |
---|
1966 | *(uint32_t *) buf = t; |
---|
1967 | buf += 4; |
---|
1968 | } while (--longs); |
---|
1969 | } |
---|
1970 | #endif /* __BYTE_ORDER */ |
---|
1971 | |
---|
1972 | /* The four core functions - F1 is optimized somewhat */ |
---|
1973 | |
---|
1974 | /* #define F1(x, y, z) (x & y | ~x & z) */ |
---|
1975 | #define F1(x, y, z) (z ^ (x & (y ^ z))) |
---|
1976 | #define F2(x, y, z) F1(z, x, y) |
---|
1977 | #define F3(x, y, z) (x ^ y ^ z) |
---|
1978 | #define F4(x, y, z) (y ^ (x | ~z)) |
---|
1979 | |
---|
1980 | /* This is the central step in the MD5 algorithm. */ |
---|
1981 | #define MD5STEP(f, w, x, y, z, data, s) \ |
---|
1982 | ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
---|
1983 | |
---|
1984 | /* |
---|
1985 | * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious |
---|
1986 | * initialization constants. |
---|
1987 | */ |
---|
1988 | static void |
---|
1989 | MD5Init(MD5_CTX *ctx) |
---|
1990 | { |
---|
1991 | ctx->buf[0] = 0x67452301; |
---|
1992 | ctx->buf[1] = 0xefcdab89; |
---|
1993 | ctx->buf[2] = 0x98badcfe; |
---|
1994 | ctx->buf[3] = 0x10325476; |
---|
1995 | |
---|
1996 | ctx->bits[0] = 0; |
---|
1997 | ctx->bits[1] = 0; |
---|
1998 | } |
---|
1999 | |
---|
2000 | /* |
---|
2001 | * The core of the MD5 algorithm, this alters an existing MD5 hash to |
---|
2002 | * reflect the addition of 16 longwords of new data. MD5Update blocks |
---|
2003 | * the data and converts bytes into longwords for this routine. |
---|
2004 | */ |
---|
2005 | static void |
---|
2006 | MD5Transform(uint32_t buf[4], uint32_t const in[16]) |
---|
2007 | { |
---|
2008 | register uint32_t a, b, c, d; |
---|
2009 | |
---|
2010 | a = buf[0]; |
---|
2011 | b = buf[1]; |
---|
2012 | c = buf[2]; |
---|
2013 | d = buf[3]; |
---|
2014 | |
---|
2015 | MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); |
---|
2016 | MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); |
---|
2017 | MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); |
---|
2018 | MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); |
---|
2019 | MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); |
---|
2020 | MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); |
---|
2021 | MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); |
---|
2022 | MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); |
---|
2023 | MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); |
---|
2024 | MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); |
---|
2025 | MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
---|
2026 | MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
---|
2027 | MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); |
---|
2028 | MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); |
---|
2029 | MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); |
---|
2030 | MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); |
---|
2031 | |
---|
2032 | MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); |
---|
2033 | MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); |
---|
2034 | MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
---|
2035 | MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); |
---|
2036 | MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); |
---|
2037 | MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); |
---|
2038 | MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
---|
2039 | MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); |
---|
2040 | MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); |
---|
2041 | MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
---|
2042 | MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); |
---|
2043 | MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); |
---|
2044 | MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
---|
2045 | MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); |
---|
2046 | MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); |
---|
2047 | MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
---|
2048 | |
---|
2049 | MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); |
---|
2050 | MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); |
---|
2051 | MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
---|
2052 | MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
---|
2053 | MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); |
---|
2054 | MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); |
---|
2055 | MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); |
---|
2056 | MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
---|
2057 | MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
---|
2058 | MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); |
---|
2059 | MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); |
---|
2060 | MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); |
---|
2061 | MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); |
---|
2062 | MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
---|
2063 | MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
---|
2064 | MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); |
---|
2065 | |
---|
2066 | MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); |
---|
2067 | MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); |
---|
2068 | MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
---|
2069 | MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); |
---|
2070 | MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
---|
2071 | MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); |
---|
2072 | MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
---|
2073 | MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); |
---|
2074 | MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); |
---|
2075 | MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
---|
2076 | MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); |
---|
2077 | MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
---|
2078 | MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); |
---|
2079 | MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
---|
2080 | MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); |
---|
2081 | MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); |
---|
2082 | |
---|
2083 | buf[0] += a; |
---|
2084 | buf[1] += b; |
---|
2085 | buf[2] += c; |
---|
2086 | buf[3] += d; |
---|
2087 | } |
---|
2088 | |
---|
2089 | /* |
---|
2090 | * Update context to reflect the concatenation of another buffer full |
---|
2091 | * of bytes. |
---|
2092 | */ |
---|
2093 | static void |
---|
2094 | MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) |
---|
2095 | { |
---|
2096 | uint32_t t; |
---|
2097 | |
---|
2098 | /* Update bitcount */ |
---|
2099 | |
---|
2100 | t = ctx->bits[0]; |
---|
2101 | if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) |
---|
2102 | ctx->bits[1]++; /* Carry from low to high */ |
---|
2103 | ctx->bits[1] += len >> 29; |
---|
2104 | |
---|
2105 | t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ |
---|
2106 | |
---|
2107 | /* Handle any leading odd-sized chunks */ |
---|
2108 | |
---|
2109 | if (t) { |
---|
2110 | unsigned char *p = (unsigned char *) ctx->in + t; |
---|
2111 | |
---|
2112 | t = 64 - t; |
---|
2113 | if (len < t) { |
---|
2114 | memcpy(p, buf, len); |
---|
2115 | return; |
---|
2116 | } |
---|
2117 | memcpy(p, buf, t); |
---|
2118 | byteReverse(ctx->in, 16); |
---|
2119 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2120 | buf += t; |
---|
2121 | len -= t; |
---|
2122 | } |
---|
2123 | /* Process data in 64-byte chunks */ |
---|
2124 | |
---|
2125 | while (len >= 64) { |
---|
2126 | memcpy(ctx->in, buf, 64); |
---|
2127 | byteReverse(ctx->in, 16); |
---|
2128 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2129 | buf += 64; |
---|
2130 | len -= 64; |
---|
2131 | } |
---|
2132 | |
---|
2133 | /* Handle any remaining bytes of data. */ |
---|
2134 | |
---|
2135 | memcpy(ctx->in, buf, len); |
---|
2136 | } |
---|
2137 | |
---|
2138 | /* |
---|
2139 | * Final wrapup - pad to 64-byte boundary with the bit pattern |
---|
2140 | * 1 0* (64-bit count of bits processed, MSB-first) |
---|
2141 | */ |
---|
2142 | static void |
---|
2143 | MD5Final(unsigned char digest[16], MD5_CTX *ctx) |
---|
2144 | { |
---|
2145 | unsigned count; |
---|
2146 | unsigned char *p; |
---|
2147 | |
---|
2148 | /* Compute number of bytes mod 64 */ |
---|
2149 | count = (ctx->bits[0] >> 3) & 0x3F; |
---|
2150 | |
---|
2151 | /* Set the first char of padding to 0x80. This is safe since there is |
---|
2152 | always at least one byte free */ |
---|
2153 | p = ctx->in + count; |
---|
2154 | *p++ = 0x80; |
---|
2155 | |
---|
2156 | /* Bytes of padding needed to make 64 bytes */ |
---|
2157 | count = 64 - 1 - count; |
---|
2158 | |
---|
2159 | /* Pad out to 56 mod 64 */ |
---|
2160 | if (count < 8) { |
---|
2161 | /* Two lots of padding: Pad the first block to 64 bytes */ |
---|
2162 | memset(p, 0, count); |
---|
2163 | byteReverse(ctx->in, 16); |
---|
2164 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2165 | |
---|
2166 | /* Now fill the next block with 56 bytes */ |
---|
2167 | memset(ctx->in, 0, 56); |
---|
2168 | } else { |
---|
2169 | /* Pad block to 56 bytes */ |
---|
2170 | memset(p, 0, count - 8); |
---|
2171 | } |
---|
2172 | byteReverse(ctx->in, 14); |
---|
2173 | |
---|
2174 | /* Append length in bits and transform */ |
---|
2175 | ((uint32_t *) ctx->in)[14] = ctx->bits[0]; |
---|
2176 | ((uint32_t *) ctx->in)[15] = ctx->bits[1]; |
---|
2177 | |
---|
2178 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
2179 | byteReverse((unsigned char *) ctx->buf, 4); |
---|
2180 | memcpy(digest, ctx->buf, 16); |
---|
2181 | memset((char *) ctx, 0, sizeof(ctx)); /* In case it's sensitive */ |
---|
2182 | } |
---|
2183 | #endif /* !HAVE_MD5 */ |
---|
2184 | |
---|
2185 | /* |
---|
2186 | * Stringify binary data. Output buffer must be twice as big as input, |
---|
2187 | * because each byte takes 2 bytes in string representation |
---|
2188 | */ |
---|
2189 | static void |
---|
2190 | bin2str(char *to, const unsigned char *p, size_t len) |
---|
2191 | { |
---|
2192 | static const char *hex = "0123456789abcdef"; |
---|
2193 | |
---|
2194 | for (; len--; p++) { |
---|
2195 | *to++ = hex[p[0] >> 4]; |
---|
2196 | *to++ = hex[p[0] & 0x0f]; |
---|
2197 | } |
---|
2198 | *to = '\0'; |
---|
2199 | } |
---|
2200 | |
---|
2201 | /* |
---|
2202 | * Return stringified MD5 hash for list of vectors. |
---|
2203 | * buf must point to 33-bytes long buffer |
---|
2204 | */ |
---|
2205 | static void |
---|
2206 | mg_md5(char *buf, ...) |
---|
2207 | { |
---|
2208 | unsigned char hash[16]; |
---|
2209 | const char *p; |
---|
2210 | va_list ap; |
---|
2211 | MD5_CTX ctx; |
---|
2212 | |
---|
2213 | MD5Init(&ctx); |
---|
2214 | |
---|
2215 | va_start(ap, buf); |
---|
2216 | while ((p = va_arg(ap, const char *)) != NULL) |
---|
2217 | MD5Update(&ctx, (unsigned char *) p, (int) strlen(p)); |
---|
2218 | va_end(ap); |
---|
2219 | |
---|
2220 | MD5Final(hash, &ctx); |
---|
2221 | bin2str(buf, hash, sizeof(hash)); |
---|
2222 | } |
---|
2223 | |
---|
2224 | /* |
---|
2225 | * Check the user's password, return 1 if OK |
---|
2226 | */ |
---|
2227 | static bool_t |
---|
2228 | check_password(const char *method, const char *ha1, const char *uri, |
---|
2229 | const char *nonce, const char *nc, const char *cnonce, |
---|
2230 | const char *qop, const char *response) |
---|
2231 | { |
---|
2232 | char ha2[32 + 1], expected_response[32 + 1]; |
---|
2233 | |
---|
2234 | /* XXX Due to a bug in MSIE, we do not compare the URI */ |
---|
2235 | /* Also, we do not check for authentication timeout */ |
---|
2236 | if (/*strcmp(dig->uri, c->ouri) != 0 || */ |
---|
2237 | strlen(response) != 32 /*|| |
---|
2238 | now - strtoul(dig->nonce, NULL, 10) > 3600 */) |
---|
2239 | return (FALSE); |
---|
2240 | |
---|
2241 | mg_md5(ha2, method, ":", uri, NULL); |
---|
2242 | mg_md5(expected_response, ha1, ":", nonce, ":", nc, |
---|
2243 | ":", cnonce, ":", qop, ":", ha2, NULL); |
---|
2244 | |
---|
2245 | return (!mg_strcasecmp(response, expected_response)); |
---|
2246 | } |
---|
2247 | |
---|
2248 | /* |
---|
2249 | * Use the global passwords file, if specified by auth_gpass option, |
---|
2250 | * or search for .htpasswd in the requested directory. |
---|
2251 | */ |
---|
2252 | static FILE * |
---|
2253 | open_auth_file(struct mg_connection *conn, const char *path) |
---|
2254 | { |
---|
2255 | struct mg_context *ctx = conn->ctx; |
---|
2256 | char name[FILENAME_MAX]; |
---|
2257 | const char *p, *e; |
---|
2258 | struct mgstat st; |
---|
2259 | FILE *fp; |
---|
2260 | |
---|
2261 | if (ctx->options[OPT_AUTH_GPASSWD] != NULL) { |
---|
2262 | /* Use global passwords file */ |
---|
2263 | fp = mg_fopen(ctx->options[OPT_AUTH_GPASSWD], "r"); |
---|
2264 | if (fp == NULL) |
---|
2265 | cry(fc(ctx), "fopen(%s): %s", |
---|
2266 | ctx->options[OPT_AUTH_GPASSWD], strerror(ERRNO)); |
---|
2267 | } else if (!mg_stat(path, &st) && st.is_directory) { |
---|
2268 | (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s", |
---|
2269 | path, DIRSEP, PASSWORDS_FILE_NAME); |
---|
2270 | fp = mg_fopen(name, "r"); |
---|
2271 | } else { |
---|
2272 | /* |
---|
2273 | * Try to find .htpasswd in requested directory. |
---|
2274 | * Given the path, create the path to .htpasswd file |
---|
2275 | * in the same directory. Find the right-most |
---|
2276 | * directory separator character first. That would be the |
---|
2277 | * directory name. If directory separator character is not |
---|
2278 | * found, 'e' will point to 'p'. |
---|
2279 | */ |
---|
2280 | for (p = path, e = p + strlen(p) - 1; e > p; e--) |
---|
2281 | if (IS_DIRSEP_CHAR(*e)) |
---|
2282 | break; |
---|
2283 | |
---|
2284 | /* |
---|
2285 | * Make up the path by concatenating directory name and |
---|
2286 | * .htpasswd file name. |
---|
2287 | */ |
---|
2288 | (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", |
---|
2289 | (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME); |
---|
2290 | fp = mg_fopen(name, "r"); |
---|
2291 | } |
---|
2292 | |
---|
2293 | return (fp); |
---|
2294 | } |
---|
2295 | |
---|
2296 | /* |
---|
2297 | * Parsed Authorization: header |
---|
2298 | */ |
---|
2299 | struct ah { |
---|
2300 | char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; |
---|
2301 | }; |
---|
2302 | |
---|
2303 | static bool_t |
---|
2304 | parse_auth_header(struct mg_connection *conn, char *buf, size_t buf_size, |
---|
2305 | struct ah *ah) |
---|
2306 | { |
---|
2307 | char *name, *value, *s; |
---|
2308 | const char *auth_header; |
---|
2309 | |
---|
2310 | if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || |
---|
2311 | mg_strncasecmp(auth_header, "Digest ", 7) != 0) |
---|
2312 | return (FALSE); |
---|
2313 | |
---|
2314 | /* Make modifiable copy of the auth header */ |
---|
2315 | (void) mg_strlcpy(buf, auth_header + 7, buf_size); |
---|
2316 | |
---|
2317 | s = buf; |
---|
2318 | (void) memset(ah, 0, sizeof(*ah)); |
---|
2319 | |
---|
2320 | /* Gobble initial spaces */ |
---|
2321 | while (isspace(* (unsigned char *) s)) |
---|
2322 | s++; |
---|
2323 | |
---|
2324 | /* Parse authorization header */ |
---|
2325 | for (;;) { |
---|
2326 | name = skip(&s, "="); |
---|
2327 | value = skip(&s, ", "); |
---|
2328 | |
---|
2329 | if (*value == '"') { |
---|
2330 | value++; |
---|
2331 | value[strlen(value) - 1] = '\0'; |
---|
2332 | } else if (*value == '\0') { |
---|
2333 | break; |
---|
2334 | } |
---|
2335 | |
---|
2336 | if (!strcmp(name, "username")) { |
---|
2337 | ah->user = value; |
---|
2338 | } else if (!strcmp(name, "cnonce")) { |
---|
2339 | ah->cnonce = value; |
---|
2340 | } else if (!strcmp(name, "response")) { |
---|
2341 | ah->response = value; |
---|
2342 | } else if (!strcmp(name, "uri")) { |
---|
2343 | ah->uri = value; |
---|
2344 | } else if (!strcmp(name, "qop")) { |
---|
2345 | ah->qop = value; |
---|
2346 | } else if (!strcmp(name, "nc")) { |
---|
2347 | ah->nc = value; |
---|
2348 | } else if (!strcmp(name, "nonce")) { |
---|
2349 | ah->nonce = value; |
---|
2350 | } |
---|
2351 | } |
---|
2352 | |
---|
2353 | /* CGI needs it as REMOTE_USER */ |
---|
2354 | if (ah->user != NULL) |
---|
2355 | conn->request_info.remote_user = mg_strdup(ah->user); |
---|
2356 | |
---|
2357 | return (TRUE); |
---|
2358 | } |
---|
2359 | |
---|
2360 | /* |
---|
2361 | * Authorize against the opened passwords file. Return 1 if authorized. |
---|
2362 | */ |
---|
2363 | static bool_t |
---|
2364 | authorize(struct mg_connection *conn, FILE *fp) |
---|
2365 | { |
---|
2366 | struct ah ah; |
---|
2367 | char line[256], f_user[256], domain[256], ha1[256], |
---|
2368 | buf[MAX_REQUEST_SIZE]; |
---|
2369 | |
---|
2370 | if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) |
---|
2371 | return (FALSE); |
---|
2372 | |
---|
2373 | /* Loop over passwords file */ |
---|
2374 | while (fgets(line, sizeof(line), fp) != NULL) { |
---|
2375 | |
---|
2376 | if (sscanf(line, "%[^:]:%[^:]:%s", f_user, domain, ha1) != 3) |
---|
2377 | continue; |
---|
2378 | |
---|
2379 | if (!strcmp(ah.user, f_user) && |
---|
2380 | !strcmp(domain, conn->ctx->options[OPT_AUTH_DOMAIN])) |
---|
2381 | return (check_password( |
---|
2382 | conn->request_info.request_method, ha1, |
---|
2383 | ah.uri, ah.nonce, ah.nc, ah.cnonce, |
---|
2384 | ah.qop, ah.response)); |
---|
2385 | } |
---|
2386 | |
---|
2387 | return (FALSE); |
---|
2388 | } |
---|
2389 | |
---|
2390 | /* |
---|
2391 | * Return TRUE if request is authorised, FALSE otherwise. |
---|
2392 | */ |
---|
2393 | static bool_t |
---|
2394 | check_authorization(struct mg_connection *conn, const char *path) |
---|
2395 | { |
---|
2396 | FILE *fp; |
---|
2397 | char fname[FILENAME_MAX]; |
---|
2398 | struct vec uri_vec, filename_vec; |
---|
2399 | const char *list; |
---|
2400 | bool_t authorized; |
---|
2401 | |
---|
2402 | fp = NULL; |
---|
2403 | authorized = TRUE; |
---|
2404 | |
---|
2405 | lock_option(conn->ctx, OPT_PROTECT); |
---|
2406 | list = conn->ctx->options[OPT_PROTECT]; |
---|
2407 | while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { |
---|
2408 | if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { |
---|
2409 | (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s", |
---|
2410 | filename_vec.len, filename_vec.ptr); |
---|
2411 | if ((fp = mg_fopen(fname, "r")) == NULL) |
---|
2412 | cry(conn, "%s: cannot open %s: %s", |
---|
2413 | __func__, fname, strerror(errno)); |
---|
2414 | break; |
---|
2415 | } |
---|
2416 | } |
---|
2417 | unlock_option(conn->ctx, OPT_PROTECT); |
---|
2418 | |
---|
2419 | if (fp == NULL) |
---|
2420 | fp = open_auth_file(conn, path); |
---|
2421 | |
---|
2422 | if (fp != NULL) { |
---|
2423 | authorized = authorize(conn, fp); |
---|
2424 | (void) fclose(fp); |
---|
2425 | } |
---|
2426 | |
---|
2427 | return (authorized); |
---|
2428 | } |
---|
2429 | |
---|
2430 | static void |
---|
2431 | send_authorization_request(struct mg_connection *conn) |
---|
2432 | { |
---|
2433 | conn->request_info.status_code = 401; |
---|
2434 | (void) mg_printf(conn, |
---|
2435 | "HTTP/1.1 401 Unauthorized\r\n" |
---|
2436 | "WWW-Authenticate: Digest qop=\"auth\", " |
---|
2437 | "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", |
---|
2438 | conn->ctx->options[OPT_AUTH_DOMAIN], (unsigned long) time(NULL)); |
---|
2439 | } |
---|
2440 | |
---|
2441 | static bool_t |
---|
2442 | is_authorized_for_put(struct mg_connection *conn) |
---|
2443 | { |
---|
2444 | FILE *fp; |
---|
2445 | int ret = FALSE; |
---|
2446 | |
---|
2447 | if ((fp = mg_fopen(conn->ctx->options[OPT_AUTH_PUT], "r")) != NULL) { |
---|
2448 | set_close_on_exec(fileno(fp)); |
---|
2449 | ret = authorize(conn, fp); |
---|
2450 | (void) fclose(fp); |
---|
2451 | } |
---|
2452 | |
---|
2453 | return (ret); |
---|
2454 | } |
---|
2455 | |
---|
2456 | int |
---|
2457 | mg_modify_passwords_file(struct mg_context *ctx, const char *fname, |
---|
2458 | const char *user, const char *pass) |
---|
2459 | { |
---|
2460 | int found; |
---|
2461 | char line[512], u[512], d[512], ha1[33], tmp[FILENAME_MAX]; |
---|
2462 | const char *domain; |
---|
2463 | FILE *fp, *fp2; |
---|
2464 | |
---|
2465 | found = 0; |
---|
2466 | fp = fp2 = NULL; |
---|
2467 | domain = ctx->options[OPT_AUTH_DOMAIN]; |
---|
2468 | |
---|
2469 | /* Regard empty password as no password - remove user record. */ |
---|
2470 | if (pass[0] == '\0') |
---|
2471 | pass = NULL; |
---|
2472 | |
---|
2473 | (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); |
---|
2474 | |
---|
2475 | /* Create the file if does not exist */ |
---|
2476 | if ((fp = mg_fopen(fname, "a+")) != NULL) |
---|
2477 | (void) fclose(fp); |
---|
2478 | |
---|
2479 | /* Open the given file and temporary file */ |
---|
2480 | if ((fp = mg_fopen(fname, "r")) == NULL) { |
---|
2481 | cry(fc(ctx), "Cannot open %s: %s", fname, strerror(errno)); |
---|
2482 | return (0); |
---|
2483 | } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) { |
---|
2484 | cry(fc(ctx), "Cannot open %s: %s", tmp, strerror(errno)); |
---|
2485 | return (0); |
---|
2486 | } |
---|
2487 | |
---|
2488 | /* Copy the stuff to temporary file */ |
---|
2489 | while (fgets(line, sizeof(line), fp) != NULL) { |
---|
2490 | |
---|
2491 | if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) |
---|
2492 | continue; |
---|
2493 | |
---|
2494 | if (!strcmp(u, user) && !strcmp(d, domain)) { |
---|
2495 | found++; |
---|
2496 | if (pass != NULL) { |
---|
2497 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
2498 | fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
2499 | } |
---|
2500 | } else { |
---|
2501 | (void) fprintf(fp2, "%s", line); |
---|
2502 | } |
---|
2503 | } |
---|
2504 | |
---|
2505 | /* If new user, just add it */ |
---|
2506 | if (!found && pass != NULL) { |
---|
2507 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
2508 | (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
2509 | } |
---|
2510 | |
---|
2511 | /* Close files */ |
---|
2512 | (void) fclose(fp); |
---|
2513 | (void) fclose(fp2); |
---|
2514 | |
---|
2515 | /* Put the temp file in place of real file */ |
---|
2516 | (void) mg_remove(fname); |
---|
2517 | (void) mg_rename(tmp, fname); |
---|
2518 | |
---|
2519 | return (0); |
---|
2520 | } |
---|
2521 | |
---|
2522 | struct de { |
---|
2523 | struct mg_connection *conn; |
---|
2524 | char *file_name; |
---|
2525 | struct mgstat st; |
---|
2526 | }; |
---|
2527 | |
---|
2528 | static void |
---|
2529 | url_encode(const char *src, char *dst, size_t dst_len) |
---|
2530 | { |
---|
2531 | const char *dont_escape = "._-$,;~()"; |
---|
2532 | const char *hex = "0123456789abcdef"; |
---|
2533 | const char *end = dst + dst_len - 1; |
---|
2534 | |
---|
2535 | for (; *src != '\0' && dst < end; src++, dst++) { |
---|
2536 | if (isalnum(*(unsigned char *) src) || |
---|
2537 | strchr(dont_escape, * (unsigned char *) src) != NULL) { |
---|
2538 | *dst = *src; |
---|
2539 | } else if (dst + 2 < end) { |
---|
2540 | dst[0] = '%'; |
---|
2541 | dst[1] = hex[(* (unsigned char *) src) >> 4]; |
---|
2542 | dst[2] = hex[(* (unsigned char *) src) & 0xf]; |
---|
2543 | dst += 2; |
---|
2544 | } |
---|
2545 | } |
---|
2546 | |
---|
2547 | *dst = '\0'; |
---|
2548 | } |
---|
2549 | |
---|
2550 | /* |
---|
2551 | * This function is called from send_directory() and prints out |
---|
2552 | * single directory entry. |
---|
2553 | */ |
---|
2554 | static void |
---|
2555 | print_dir_entry(struct de *de) |
---|
2556 | { |
---|
2557 | char size[64], mod[64], href[FILENAME_MAX]; |
---|
2558 | |
---|
2559 | if (de->st.is_directory) { |
---|
2560 | (void) mg_snprintf(de->conn, |
---|
2561 | size, sizeof(size), "%s", "[DIRECTORY]"); |
---|
2562 | } else { |
---|
2563 | /* |
---|
2564 | * We use (signed) cast below because MSVC 6 compiler cannot |
---|
2565 | * convert unsigned __int64 to double. Sigh. |
---|
2566 | */ |
---|
2567 | if (de->st.size < 1024) |
---|
2568 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2569 | "%lu", (unsigned long) de->st.size); |
---|
2570 | else if (de->st.size < 1024 * 1024) |
---|
2571 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2572 | "%.1fk", (double) de->st.size / 1024.0); |
---|
2573 | else if (de->st.size < 1024 * 1024 * 1024) |
---|
2574 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2575 | "%.1fM", (double) de->st.size / 1048576); |
---|
2576 | else |
---|
2577 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
2578 | "%.1fG", (double) de->st.size / 1073741824); |
---|
2579 | } |
---|
2580 | (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", |
---|
2581 | localtime(&de->st.mtime)); |
---|
2582 | |
---|
2583 | url_encode(de->file_name, href, sizeof(href)); |
---|
2584 | |
---|
2585 | de->conn->num_bytes_sent += mg_printf(de->conn, |
---|
2586 | "<tr><td><a href=\"%s%s%s\">%s%s</a></td>" |
---|
2587 | "<td> %s</td><td> %s</td></tr>\n", |
---|
2588 | de->conn->request_info.uri, href, de->st.is_directory ? "/" : "", |
---|
2589 | de->file_name, de->st.is_directory ? "/" : "", mod, size); |
---|
2590 | } |
---|
2591 | |
---|
2592 | /* |
---|
2593 | * This function is called from send_directory() and used for |
---|
2594 | * sorting direcotory entries by size, or name, or modification time. |
---|
2595 | */ |
---|
2596 | static int |
---|
2597 | compare_dir_entries(const void *p1, const void *p2) |
---|
2598 | { |
---|
2599 | const struct de *a = (struct de *) p1, *b = (struct de *) p2; |
---|
2600 | const char *query_string = a->conn->request_info.query_string; |
---|
2601 | int cmp_result = 0; |
---|
2602 | |
---|
2603 | if (query_string == NULL) |
---|
2604 | query_string = "na"; |
---|
2605 | |
---|
2606 | if (a->st.is_directory && !b->st.is_directory) { |
---|
2607 | return (-1); /* Always put directories on top */ |
---|
2608 | } else if (!a->st.is_directory && b->st.is_directory) { |
---|
2609 | return (1); /* Always put directories on top */ |
---|
2610 | } else if (*query_string == 'n') { |
---|
2611 | cmp_result = strcmp(a->file_name, b->file_name); |
---|
2612 | } else if (*query_string == 's') { |
---|
2613 | cmp_result = a->st.size == b->st.size ? 0 : |
---|
2614 | a->st.size > b->st.size ? 1 : -1; |
---|
2615 | } else if (*query_string == 'd') { |
---|
2616 | cmp_result = a->st.mtime == b->st.mtime ? 0 : |
---|
2617 | a->st.mtime > b->st.mtime ? 1 : -1; |
---|
2618 | } |
---|
2619 | |
---|
2620 | return (query_string[1] == 'd' ? -cmp_result : cmp_result); |
---|
2621 | } |
---|
2622 | |
---|
2623 | /* |
---|
2624 | * Send directory contents. |
---|
2625 | */ |
---|
2626 | static void |
---|
2627 | send_directory(struct mg_connection *conn, const char *dir) |
---|
2628 | { |
---|
2629 | struct dirent *dp; |
---|
2630 | DIR *dirp; |
---|
2631 | struct de *entries = NULL; |
---|
2632 | char path[FILENAME_MAX]; |
---|
2633 | int i, sort_direction, num_entries = 0, arr_size = 128; |
---|
2634 | |
---|
2635 | if ((dirp = opendir(dir)) == NULL) { |
---|
2636 | send_error(conn, 500, "Cannot open directory", |
---|
2637 | "Error: opendir(%s): %s", path, strerror(ERRNO)); |
---|
2638 | return; |
---|
2639 | } |
---|
2640 | |
---|
2641 | (void) mg_printf(conn, "%s", |
---|
2642 | "HTTP/1.1 200 OK\r\n" |
---|
2643 | "Connection: close\r\n" |
---|
2644 | "Content-Type: text/html; charset=utf-8\r\n\r\n"); |
---|
2645 | |
---|
2646 | sort_direction = conn->request_info.query_string != NULL && |
---|
2647 | conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; |
---|
2648 | |
---|
2649 | while ((dp = readdir(dirp)) != NULL) { |
---|
2650 | |
---|
2651 | /* Do not show current dir and passwords file */ |
---|
2652 | if (!strcmp(dp->d_name, ".") || |
---|
2653 | !strcmp(dp->d_name, "..") || |
---|
2654 | !strcmp(dp->d_name, PASSWORDS_FILE_NAME)) |
---|
2655 | continue; |
---|
2656 | |
---|
2657 | if (entries == NULL || num_entries >= arr_size) { |
---|
2658 | arr_size *= 2; |
---|
2659 | entries = (struct de *) realloc(entries, |
---|
2660 | arr_size * sizeof(entries[0])); |
---|
2661 | } |
---|
2662 | |
---|
2663 | if (entries == NULL) { |
---|
2664 | send_error(conn, 500, "Cannot open directory", |
---|
2665 | "%s", "Error: cannot allocate memory"); |
---|
2666 | return; |
---|
2667 | } |
---|
2668 | |
---|
2669 | (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
---|
2670 | dir, DIRSEP, dp->d_name); |
---|
2671 | |
---|
2672 | /* |
---|
2673 | * If we don't memset stat structure to zero, mtime will have |
---|
2674 | * garbage and strftime() will segfault later on in |
---|
2675 | * print_dir_entry(). memset is required only if mg_stat() |
---|
2676 | * fails. For more details, see |
---|
2677 | * http://code.google.com/p/mongoose/issues/detail?id=79 |
---|
2678 | */ |
---|
2679 | if (mg_stat(path, &entries[num_entries].st) != 0) |
---|
2680 | (void) memset(&entries[num_entries].st, 0, |
---|
2681 | sizeof(entries[num_entries].st)); |
---|
2682 | |
---|
2683 | entries[num_entries].conn = conn; |
---|
2684 | entries[num_entries].file_name = mg_strdup(dp->d_name); |
---|
2685 | num_entries++; |
---|
2686 | } |
---|
2687 | (void) closedir(dirp); |
---|
2688 | |
---|
2689 | conn->num_bytes_sent += mg_printf(conn, |
---|
2690 | "<html><head><title>Index of %s</title>" |
---|
2691 | "<style>th {text-align: left;}</style></head>" |
---|
2692 | "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" |
---|
2693 | "<tr><th><a href=\"?n%c\">Name</a></th>" |
---|
2694 | "<th><a href=\"?d%c\">Modified</a></th>" |
---|
2695 | "<th><a href=\"?s%c\">Size</a></th></tr>" |
---|
2696 | "<tr><td colspan=\"3\"><hr></td></tr>", |
---|
2697 | conn->request_info.uri, conn->request_info.uri, |
---|
2698 | sort_direction, sort_direction, sort_direction); |
---|
2699 | |
---|
2700 | /* Print first entry - link to a parent directory */ |
---|
2701 | conn->num_bytes_sent += mg_printf(conn, |
---|
2702 | "<tr><td><a href=\"%s%s\">%s</a></td>" |
---|
2703 | "<td> %s</td><td> %s</td></tr>\n", |
---|
2704 | conn->request_info.uri, "..", "Parent directory", "-", "-"); |
---|
2705 | |
---|
2706 | /* Sort and print directory entries */ |
---|
2707 | qsort(entries, num_entries, sizeof(entries[0]), compare_dir_entries); |
---|
2708 | for (i = 0; i < num_entries; i++) { |
---|
2709 | print_dir_entry(&entries[i]); |
---|
2710 | free(entries[i].file_name); |
---|
2711 | } |
---|
2712 | free(entries); |
---|
2713 | |
---|
2714 | conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>"); |
---|
2715 | conn->request_info.status_code = 200; |
---|
2716 | } |
---|
2717 | |
---|
2718 | /* |
---|
2719 | * Send len bytes from the opened file to the client. |
---|
2720 | */ |
---|
2721 | static void |
---|
2722 | send_opened_file_stream(struct mg_connection *conn, FILE *fp, int64_t len) |
---|
2723 | { |
---|
2724 | char buf[BUFSIZ]; |
---|
2725 | int to_read, num_read, num_written; |
---|
2726 | |
---|
2727 | while (len > 0) { |
---|
2728 | /* Calculate how much to read from the file in the buffer */ |
---|
2729 | to_read = sizeof(buf); |
---|
2730 | if ((int64_t) to_read > len) |
---|
2731 | to_read = (int) len; |
---|
2732 | |
---|
2733 | /* Read from file, exit the loop on error */ |
---|
2734 | if ((num_read = fread(buf, 1, to_read, fp)) == 0) |
---|
2735 | break; |
---|
2736 | |
---|
2737 | /* Send read bytes to the client, exit the loop on error */ |
---|
2738 | if ((num_written = mg_write(conn, buf, num_read)) != num_read) |
---|
2739 | break; |
---|
2740 | |
---|
2741 | /* Both read and were successful, adjust counters */ |
---|
2742 | conn->num_bytes_sent += num_written; |
---|
2743 | len -= num_written; |
---|
2744 | } |
---|
2745 | } |
---|
2746 | |
---|
2747 | /* |
---|
2748 | * Send regular file contents. |
---|
2749 | */ |
---|
2750 | static void |
---|
2751 | send_file(struct mg_connection *conn, const char *path, struct mgstat *stp) |
---|
2752 | { |
---|
2753 | char date[64], lm[64], etag[64], range[64]; |
---|
2754 | const char *fmt = "%a, %d %b %Y %H:%M:%S %Z", *msg = "OK", *hdr; |
---|
2755 | time_t curtime = time(NULL); |
---|
2756 | int64_t cl, r1, r2; |
---|
2757 | struct vec mime_vec; |
---|
2758 | FILE *fp; |
---|
2759 | int n; |
---|
2760 | |
---|
2761 | get_mime_type(conn->ctx, path, &mime_vec); |
---|
2762 | cl = stp->size; |
---|
2763 | conn->request_info.status_code = 200; |
---|
2764 | range[0] = '\0'; |
---|
2765 | |
---|
2766 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
2767 | send_error(conn, 500, http_500_error, |
---|
2768 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
2769 | return; |
---|
2770 | } |
---|
2771 | set_close_on_exec(fileno(fp)); |
---|
2772 | |
---|
2773 | /* If Range: header specified, act accordingly */ |
---|
2774 | r1 = r2 = 0; |
---|
2775 | hdr = mg_get_header(conn, "Range"); |
---|
2776 | if (hdr != NULL && (n = sscanf(hdr, |
---|
2777 | "bytes=%" INT64_FMT "-%" INT64_FMT, &r1, &r2)) > 0) { |
---|
2778 | conn->request_info.status_code = 206; |
---|
2779 | (void) fseeko(fp, (off_t) r1, SEEK_SET); |
---|
2780 | cl = n == 2 ? r2 - r1 + 1: cl - r1; |
---|
2781 | (void) mg_snprintf(conn, range, sizeof(range), |
---|
2782 | "Content-Range: bytes " |
---|
2783 | "%" INT64_FMT "-%" |
---|
2784 | INT64_FMT "/%" INT64_FMT "\r\n", |
---|
2785 | r1, r1 + cl - 1, stp->size); |
---|
2786 | msg = "Partial Content"; |
---|
2787 | } |
---|
2788 | |
---|
2789 | /* Prepare Etag, Date, Last-Modified headers */ |
---|
2790 | (void) strftime(date, sizeof(date), fmt, localtime(&curtime)); |
---|
2791 | (void) strftime(lm, sizeof(lm), fmt, localtime(&stp->mtime)); |
---|
2792 | (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx", |
---|
2793 | (unsigned long) stp->mtime, (unsigned long) stp->size); |
---|
2794 | |
---|
2795 | (void) mg_printf(conn, |
---|
2796 | "HTTP/1.1 %d %s\r\n" |
---|
2797 | "Date: %s\r\n" |
---|
2798 | "Last-Modified: %s\r\n" |
---|
2799 | "Etag: \"%s\"\r\n" |
---|
2800 | "Content-Type: %.*s\r\n" |
---|
2801 | "Content-Length: %" INT64_FMT "\r\n" |
---|
2802 | "Connection: close\r\n" |
---|
2803 | "Accept-Ranges: bytes\r\n" |
---|
2804 | "%s\r\n", |
---|
2805 | conn->request_info.status_code, msg, date, lm, etag, |
---|
2806 | mime_vec.len, mime_vec.ptr, cl, range); |
---|
2807 | |
---|
2808 | if (strcmp(conn->request_info.request_method, "HEAD") != 0) |
---|
2809 | send_opened_file_stream(conn, fp, cl); |
---|
2810 | (void) fclose(fp); |
---|
2811 | } |
---|
2812 | |
---|
2813 | /* |
---|
2814 | * Parse HTTP headers from the given buffer, advance buffer to the point |
---|
2815 | * where parsing stopped. |
---|
2816 | */ |
---|
2817 | static void |
---|
2818 | parse_http_headers(char **buf, struct mg_request_info *ri) |
---|
2819 | { |
---|
2820 | int i; |
---|
2821 | |
---|
2822 | for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) { |
---|
2823 | ri->http_headers[i].name = skip(buf, ": "); |
---|
2824 | ri->http_headers[i].value = skip(buf, "\r\n"); |
---|
2825 | if (ri->http_headers[i].name[0] == '\0') |
---|
2826 | break; |
---|
2827 | ri->num_headers = i + 1; |
---|
2828 | } |
---|
2829 | } |
---|
2830 | |
---|
2831 | static bool_t |
---|
2832 | is_valid_http_method(const char *method) |
---|
2833 | { |
---|
2834 | return (!strcmp(method, "GET") || |
---|
2835 | !strcmp(method, "POST") || |
---|
2836 | !strcmp(method, "HEAD") || |
---|
2837 | !strcmp(method, "PUT") || |
---|
2838 | !strcmp(method, "DELETE")); |
---|
2839 | } |
---|
2840 | |
---|
2841 | /* |
---|
2842 | * Parse HTTP request, fill in mg_request_info structure. |
---|
2843 | */ |
---|
2844 | static bool_t |
---|
2845 | parse_http_request(char *buf, struct mg_request_info *ri, const struct usa *usa) |
---|
2846 | { |
---|
2847 | int success_code = FALSE; |
---|
2848 | |
---|
2849 | ri->request_method = skip(&buf, " "); |
---|
2850 | ri->uri = skip(&buf, " "); |
---|
2851 | ri->http_version = skip(&buf, "\r\n"); |
---|
2852 | |
---|
2853 | if (is_valid_http_method(ri->request_method) && |
---|
2854 | ri->uri[0] == '/' && |
---|
2855 | strncmp(ri->http_version, "HTTP/", 5) == 0) { |
---|
2856 | ri->http_version += 5; /* Skip "HTTP/" */ |
---|
2857 | parse_http_headers(&buf, ri); |
---|
2858 | ri->remote_port = ntohs(usa->u.sin.sin_port); |
---|
2859 | (void) memcpy(&ri->remote_ip, &usa->u.sin.sin_addr.s_addr, 4); |
---|
2860 | ri->remote_ip = ntohl(ri->remote_ip); |
---|
2861 | success_code = TRUE; |
---|
2862 | } |
---|
2863 | |
---|
2864 | return (success_code); |
---|
2865 | } |
---|
2866 | |
---|
2867 | /* |
---|
2868 | * Keep reading the input (either opened file descriptor fd, or socket sock, |
---|
2869 | * or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the |
---|
2870 | * buffer (which marks the end of HTTP request). Buffer buf may already |
---|
2871 | * have some data. The length of the data is stored in nread. |
---|
2872 | * Upon every read operation, increase nread by the number of bytes read. |
---|
2873 | */ |
---|
2874 | static int |
---|
2875 | read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz, int *nread) |
---|
2876 | { |
---|
2877 | int n, request_len; |
---|
2878 | |
---|
2879 | request_len = 0; |
---|
2880 | while (*nread < bufsiz && request_len == 0) { |
---|
2881 | n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread); |
---|
2882 | if (n <= 0) { |
---|
2883 | break; |
---|
2884 | } else { |
---|
2885 | *nread += n; |
---|
2886 | request_len = get_request_len(buf, (size_t) *nread); |
---|
2887 | } |
---|
2888 | } |
---|
2889 | |
---|
2890 | return (request_len); |
---|
2891 | } |
---|
2892 | |
---|
2893 | /* |
---|
2894 | * For given directory path, substitute it to valid index file. |
---|
2895 | * Return 0 if index file has been found, -1 if not found. |
---|
2896 | * If the file is found, it's stats is returned in stp. |
---|
2897 | */ |
---|
2898 | static bool_t |
---|
2899 | substitute_index_file(struct mg_connection *conn, |
---|
2900 | char *path, size_t path_len, struct mgstat *stp) |
---|
2901 | { |
---|
2902 | const char *list; |
---|
2903 | struct mgstat st; |
---|
2904 | struct vec filename_vec; |
---|
2905 | size_t n; |
---|
2906 | bool_t found; |
---|
2907 | |
---|
2908 | n = strlen(path); |
---|
2909 | |
---|
2910 | /* |
---|
2911 | * The 'path' given to us points to the directory. Remove all trailing |
---|
2912 | * directory separator characters from the end of the path, and |
---|
2913 | * then append single directory separator character. |
---|
2914 | */ |
---|
2915 | while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) |
---|
2916 | n--; |
---|
2917 | path[n] = DIRSEP; |
---|
2918 | |
---|
2919 | /* |
---|
2920 | * Traverse index files list. For each entry, append it to the given |
---|
2921 | * path and see if the file exists. If it exists, break the loop |
---|
2922 | */ |
---|
2923 | lock_option(conn->ctx, OPT_INDEX_FILES); |
---|
2924 | list = conn->ctx->options[OPT_INDEX_FILES]; |
---|
2925 | found = FALSE; |
---|
2926 | |
---|
2927 | while ((list = next_option(list, &filename_vec, NULL)) != NULL) { |
---|
2928 | |
---|
2929 | /* Ignore too long entries that may overflow path buffer */ |
---|
2930 | if (filename_vec.len > path_len - n) |
---|
2931 | continue; |
---|
2932 | |
---|
2933 | /* Prepare full path to the index file */ |
---|
2934 | (void) mg_strlcpy(path + n + 1, |
---|
2935 | filename_vec.ptr, filename_vec.len + 1); |
---|
2936 | |
---|
2937 | /* Does it exist ? */ |
---|
2938 | if (mg_stat(path, &st) == 0) { |
---|
2939 | /* Yes it does, break the loop */ |
---|
2940 | *stp = st; |
---|
2941 | found = TRUE; |
---|
2942 | break; |
---|
2943 | } |
---|
2944 | } |
---|
2945 | unlock_option(conn->ctx, OPT_INDEX_FILES); |
---|
2946 | |
---|
2947 | /* If no index file exists, restore directory path */ |
---|
2948 | if (found == FALSE) |
---|
2949 | path[n] = '\0'; |
---|
2950 | |
---|
2951 | return (found); |
---|
2952 | } |
---|
2953 | |
---|
2954 | static void |
---|
2955 | remove_callback(struct mg_context *ctx, |
---|
2956 | const char *uri_regex, int status_code, bool_t is_auth) |
---|
2957 | { |
---|
2958 | struct callback *cb; |
---|
2959 | int i; |
---|
2960 | |
---|
2961 | for (i = 0; i < ctx->num_callbacks; i++) { |
---|
2962 | cb = ctx->callbacks + i; |
---|
2963 | if ((uri_regex != NULL && cb->uri_regex != NULL && |
---|
2964 | ((is_auth && cb->is_auth) || (!is_auth && !cb->is_auth)) && |
---|
2965 | !strcmp(uri_regex, cb->uri_regex)) || (uri_regex == NULL && |
---|
2966 | (cb->status_code == 0 || |
---|
2967 | cb->status_code == status_code))) { |
---|
2968 | (void) memmove(cb, cb + 1, |
---|
2969 | (char *) (ctx->callbacks + ctx->num_callbacks) - |
---|
2970 | (char *) (cb + 1)); |
---|
2971 | break; |
---|
2972 | } |
---|
2973 | } |
---|
2974 | } |
---|
2975 | |
---|
2976 | static void |
---|
2977 | add_callback(struct mg_context *ctx, const char *uri_regex, int status_code, |
---|
2978 | mg_callback_t func, bool_t is_auth, void *user_data) |
---|
2979 | { |
---|
2980 | struct callback *cb; |
---|
2981 | |
---|
2982 | pthread_mutex_lock(&ctx->bind_mutex); |
---|
2983 | if (func == NULL) { |
---|
2984 | remove_callback(ctx, uri_regex, status_code, is_auth); |
---|
2985 | } else if (ctx->num_callbacks >= (int) ARRAY_SIZE(ctx->callbacks) - 1) { |
---|
2986 | cry(fc(ctx), "Too many callbacks! Increase MAX_CALLBACKS."); |
---|
2987 | } else { |
---|
2988 | cb = &ctx->callbacks[ctx->num_callbacks]; |
---|
2989 | cb->uri_regex = uri_regex ? mg_strdup(uri_regex) : NULL; |
---|
2990 | cb->func = func; |
---|
2991 | cb->is_auth = is_auth; |
---|
2992 | cb->status_code = status_code; |
---|
2993 | cb->user_data = user_data; |
---|
2994 | ctx->num_callbacks++; |
---|
2995 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: uri %s code %d", |
---|
2996 | __func__, uri_regex ? uri_regex : "NULL", status_code)); |
---|
2997 | } |
---|
2998 | pthread_mutex_unlock(&ctx->bind_mutex); |
---|
2999 | } |
---|
3000 | |
---|
3001 | void |
---|
3002 | mg_set_uri_callback(struct mg_context *ctx, const char *uri_regex, |
---|
3003 | mg_callback_t func, void *user_data) |
---|
3004 | { |
---|
3005 | assert(uri_regex != NULL); |
---|
3006 | add_callback(ctx, uri_regex, -1, func, FALSE, user_data); |
---|
3007 | } |
---|
3008 | |
---|
3009 | void |
---|
3010 | mg_set_error_callback(struct mg_context *ctx, int error_code, |
---|
3011 | mg_callback_t func, void *user_data) |
---|
3012 | { |
---|
3013 | assert(error_code >= 0 && error_code < 1000); |
---|
3014 | add_callback(ctx, NULL, error_code, func, FALSE, user_data); |
---|
3015 | } |
---|
3016 | |
---|
3017 | void |
---|
3018 | mg_set_auth_callback(struct mg_context *ctx, const char *uri_regex, |
---|
3019 | mg_callback_t func, void *user_data) |
---|
3020 | { |
---|
3021 | assert(uri_regex != NULL); |
---|
3022 | add_callback(ctx, uri_regex, -1, func, TRUE, user_data); |
---|
3023 | } |
---|
3024 | |
---|
3025 | /* |
---|
3026 | * Return True if we should reply 304 Not Modified. |
---|
3027 | */ |
---|
3028 | static bool_t |
---|
3029 | is_not_modified(const struct mg_connection *conn, const struct mgstat *stp) |
---|
3030 | { |
---|
3031 | const char *ims = mg_get_header(conn, "If-Modified-Since"); |
---|
3032 | return (ims != NULL && stp->mtime < date_to_epoch(ims)); |
---|
3033 | } |
---|
3034 | |
---|
3035 | static bool_t |
---|
3036 | append_chunk(struct mg_request_info *ri, FILE *fp, const char *buf, int len) |
---|
3037 | { |
---|
3038 | bool_t ret_code = TRUE; |
---|
3039 | |
---|
3040 | if (fp == NULL) { |
---|
3041 | /* TODO: check for NULL here */ |
---|
3042 | ri->post_data = (char *) realloc(ri->post_data, |
---|
3043 | ri->post_data_len + len); |
---|
3044 | (void) memcpy(ri->post_data + ri->post_data_len, buf, len); |
---|
3045 | ri->post_data_len += len; |
---|
3046 | } else if (push(fp, INVALID_SOCKET, |
---|
3047 | NULL, buf, (int64_t) len) != (int64_t) len) { |
---|
3048 | ret_code = FALSE; |
---|
3049 | } |
---|
3050 | |
---|
3051 | return (ret_code); |
---|
3052 | } |
---|
3053 | |
---|
3054 | static bool_t |
---|
3055 | handle_request_body(struct mg_connection *conn, FILE *fp) |
---|
3056 | { |
---|
3057 | struct mg_request_info *ri = &conn->request_info; |
---|
3058 | const char *expect, *tmp; |
---|
3059 | int64_t content_len; |
---|
3060 | char buf[BUFSIZ]; |
---|
3061 | int to_read, nread, already_read; |
---|
3062 | bool_t success_code = FALSE; |
---|
3063 | |
---|
3064 | content_len = get_content_length(conn); |
---|
3065 | expect = mg_get_header(conn, "Expect"); |
---|
3066 | |
---|
3067 | if (content_len == -1) { |
---|
3068 | send_error(conn, 411, "Length Required", ""); |
---|
3069 | } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) { |
---|
3070 | send_error(conn, 417, "Expectation Failed", ""); |
---|
3071 | } else { |
---|
3072 | if (expect != NULL) |
---|
3073 | (void) mg_printf(conn, "HTTP/1.1 100 Continue\r\n\r\n"); |
---|
3074 | |
---|
3075 | already_read = ri->post_data_len; |
---|
3076 | assert(already_read >= 0); |
---|
3077 | |
---|
3078 | if (content_len <= (int64_t) already_read) { |
---|
3079 | ri->post_data_len = (int) content_len; |
---|
3080 | /* |
---|
3081 | * If fp is NULL, this is embedded mode, and we do not |
---|
3082 | * have to do anything: POST data is already there, |
---|
3083 | * no need to allocate a buffer and copy it in. |
---|
3084 | * If fp != NULL, we need to write the data. |
---|
3085 | */ |
---|
3086 | success_code = fp == NULL || (push(fp, INVALID_SOCKET, |
---|
3087 | NULL, ri->post_data, content_len) == content_len) ? |
---|
3088 | TRUE : FALSE; |
---|
3089 | } else { |
---|
3090 | |
---|
3091 | if (fp == NULL) { |
---|
3092 | conn->free_post_data = TRUE; |
---|
3093 | tmp = ri->post_data; |
---|
3094 | /* +1 in case if already_read == 0 */ |
---|
3095 | ri->post_data = (char*)malloc(already_read + 1); |
---|
3096 | (void) memcpy(ri->post_data, tmp, already_read); |
---|
3097 | } else { |
---|
3098 | (void) push(fp, INVALID_SOCKET, NULL, |
---|
3099 | ri->post_data, (int64_t) already_read); |
---|
3100 | } |
---|
3101 | |
---|
3102 | content_len -= already_read; |
---|
3103 | |
---|
3104 | while (content_len > 0) { |
---|
3105 | to_read = sizeof(buf); |
---|
3106 | if ((int64_t) to_read > content_len) |
---|
3107 | to_read = (int) content_len; |
---|
3108 | nread = pull(NULL, conn->client.sock, |
---|
3109 | conn->ssl, buf, to_read); |
---|
3110 | if (nread <= 0) |
---|
3111 | break; |
---|
3112 | if (!append_chunk(ri, fp, buf, nread)) |
---|
3113 | break; |
---|
3114 | content_len -= nread; |
---|
3115 | } |
---|
3116 | success_code = content_len == 0 ? TRUE : FALSE; |
---|
3117 | } |
---|
3118 | |
---|
3119 | /* Each error code path in this function must send an error */ |
---|
3120 | if (success_code != TRUE) |
---|
3121 | send_error(conn, 577, http_500_error, |
---|
3122 | "%s", "Error handling body data"); |
---|
3123 | } |
---|
3124 | |
---|
3125 | return (success_code); |
---|
3126 | } |
---|
3127 | |
---|
3128 | #if !defined(NO_CGI) |
---|
3129 | |
---|
3130 | /* |
---|
3131 | * This structure helps to create an environment for the spawned CGI program. |
---|
3132 | * Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, |
---|
3133 | * last element must be NULL. |
---|
3134 | * However, on Windows there is a requirement that all these VARIABLE=VALUE\0 |
---|
3135 | * strings must reside in a contiguous buffer. The end of the buffer is |
---|
3136 | * marked by two '\0' characters. |
---|
3137 | * We satisfy both worlds: we create an envp array (which is vars), all |
---|
3138 | * entries are actually pointers inside buf. |
---|
3139 | */ |
---|
3140 | struct cgi_env_block { |
---|
3141 | struct mg_connection *conn; |
---|
3142 | char buf[CGI_ENVIRONMENT_SIZE]; /* Environment buffer */ |
---|
3143 | int len; /* Space taken */ |
---|
3144 | char *vars[MAX_CGI_ENVIR_VARS]; /* char **envp */ |
---|
3145 | int nvars; /* Number of variables */ |
---|
3146 | }; |
---|
3147 | |
---|
3148 | /* |
---|
3149 | * Append VARIABLE=VALUE\0 string to the buffer, and add a respective |
---|
3150 | * pointer into the vars array. |
---|
3151 | */ |
---|
3152 | static char * |
---|
3153 | addenv(struct cgi_env_block *block, const char *fmt, ...) |
---|
3154 | { |
---|
3155 | int n, space; |
---|
3156 | char *added; |
---|
3157 | va_list ap; |
---|
3158 | |
---|
3159 | /* Calculate how much space is left in the buffer */ |
---|
3160 | space = sizeof(block->buf) - block->len - 2; |
---|
3161 | assert(space >= 0); |
---|
3162 | |
---|
3163 | /* Make a pointer to the free space int the buffer */ |
---|
3164 | added = block->buf + block->len; |
---|
3165 | |
---|
3166 | /* Copy VARIABLE=VALUE\0 string into the free space */ |
---|
3167 | va_start(ap, fmt); |
---|
3168 | n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap); |
---|
3169 | va_end(ap); |
---|
3170 | |
---|
3171 | /* Make sure we do not overflow buffer and the envp array */ |
---|
3172 | if (n > 0 && n < space && |
---|
3173 | block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { |
---|
3174 | /* Append a pointer to the added string into the envp array */ |
---|
3175 | block->vars[block->nvars++] = block->buf + block->len; |
---|
3176 | /* Bump up used length counter. Include \0 terminator */ |
---|
3177 | block->len += n + 1; |
---|
3178 | } |
---|
3179 | |
---|
3180 | return (added); |
---|
3181 | } |
---|
3182 | |
---|
3183 | static void |
---|
3184 | prepare_cgi_environment(struct mg_connection *conn, const char *prog, |
---|
3185 | struct cgi_env_block *blk) |
---|
3186 | { |
---|
3187 | const char *s, *script_filename, *root, *slash; |
---|
3188 | struct vec var_vec; |
---|
3189 | char *p; |
---|
3190 | int i; |
---|
3191 | |
---|
3192 | blk->len = blk->nvars = 0; |
---|
3193 | blk->conn = conn; |
---|
3194 | |
---|
3195 | /* SCRIPT_FILENAME */ |
---|
3196 | script_filename = prog; |
---|
3197 | if ((s = strrchr(prog, '/')) != NULL) |
---|
3198 | script_filename = s + 1; |
---|
3199 | |
---|
3200 | lock_option(conn->ctx, OPT_ROOT); |
---|
3201 | root = conn->ctx->options[OPT_ROOT]; |
---|
3202 | addenv(blk, "SERVER_NAME=%s", conn->ctx->options[OPT_AUTH_DOMAIN]); |
---|
3203 | unlock_option(conn->ctx, OPT_ROOT); |
---|
3204 | |
---|
3205 | /* Prepare the environment block */ |
---|
3206 | addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); |
---|
3207 | addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); |
---|
3208 | addenv(blk, "%s", "REDIRECT_STATUS=200"); /* PHP */ |
---|
3209 | addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.u.sin.sin_port)); |
---|
3210 | addenv(blk, "SERVER_ROOT=%s", root); |
---|
3211 | addenv(blk, "DOCUMENT_ROOT=%s", root); |
---|
3212 | addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method); |
---|
3213 | addenv(blk, "REMOTE_ADDR=%s", |
---|
3214 | inet_ntoa(conn->client.rsa.u.sin.sin_addr)); |
---|
3215 | addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port); |
---|
3216 | addenv(blk, "REQUEST_URI=%s", conn->request_info.uri); |
---|
3217 | |
---|
3218 | slash = strrchr(conn->request_info.uri, '/'); |
---|
3219 | addenv(blk, "SCRIPT_NAME=%.*s%s", |
---|
3220 | (slash - conn->request_info.uri) + 1, conn->request_info.uri, |
---|
3221 | script_filename); |
---|
3222 | |
---|
3223 | addenv(blk, "SCRIPT_FILENAME=%s", script_filename); /* PHP */ |
---|
3224 | addenv(blk, "PATH_TRANSLATED=%s", prog); |
---|
3225 | addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on"); |
---|
3226 | |
---|
3227 | if ((s = mg_get_header(conn, "Content-Type")) != NULL) |
---|
3228 | addenv(blk, "CONTENT_TYPE=%s", s); |
---|
3229 | |
---|
3230 | if (conn->request_info.query_string != NULL) |
---|
3231 | addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string); |
---|
3232 | |
---|
3233 | if ((s = mg_get_header(conn, "Content-Length")) != NULL) |
---|
3234 | addenv(blk, "CONTENT_LENGTH=%s", s); |
---|
3235 | |
---|
3236 | if ((s = getenv("PATH")) != NULL) |
---|
3237 | addenv(blk, "PATH=%s", s); |
---|
3238 | |
---|
3239 | #if defined(_WIN32) |
---|
3240 | if ((s = getenv("COMSPEC")) != NULL) |
---|
3241 | addenv(blk, "COMSPEC=%s", s); |
---|
3242 | if ((s = getenv("SYSTEMROOT")) != NULL) |
---|
3243 | addenv(blk, "SYSTEMROOT=%s", s); |
---|
3244 | #else |
---|
3245 | if ((s = getenv("LD_LIBRARY_PATH")) != NULL) |
---|
3246 | addenv(blk, "LD_LIBRARY_PATH=%s", s); |
---|
3247 | #endif /* _WIN32 */ |
---|
3248 | |
---|
3249 | if ((s = getenv("PERLLIB")) != NULL) |
---|
3250 | addenv(blk, "PERLLIB=%s", s); |
---|
3251 | |
---|
3252 | if (conn->request_info.remote_user != NULL) { |
---|
3253 | addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user); |
---|
3254 | addenv(blk, "%s", "AUTH_TYPE=Digest"); |
---|
3255 | } |
---|
3256 | |
---|
3257 | /* Add all headers as HTTP_* variables */ |
---|
3258 | for (i = 0; i < conn->request_info.num_headers; i++) { |
---|
3259 | p = addenv(blk, "HTTP_%s=%s", |
---|
3260 | conn->request_info.http_headers[i].name, |
---|
3261 | conn->request_info.http_headers[i].value); |
---|
3262 | |
---|
3263 | /* Convert variable name into uppercase, and change - to _ */ |
---|
3264 | for (; *p != '=' && *p != '\0'; p++) { |
---|
3265 | if (*p == '-') |
---|
3266 | *p = '_'; |
---|
3267 | *p = (char) toupper(* (unsigned char *) p); |
---|
3268 | } |
---|
3269 | } |
---|
3270 | |
---|
3271 | /* Add user-specified variables */ |
---|
3272 | lock_option(conn->ctx, OPT_CGI_ENV); |
---|
3273 | s = conn->ctx->options[OPT_CGI_ENV]; |
---|
3274 | while ((s = next_option(s, &var_vec, NULL)) != NULL) |
---|
3275 | addenv(blk, "%.*s", var_vec.len, var_vec.ptr); |
---|
3276 | unlock_option(conn->ctx, OPT_CGI_ENV); |
---|
3277 | |
---|
3278 | blk->vars[blk->nvars++] = NULL; |
---|
3279 | blk->buf[blk->len++] = '\0'; |
---|
3280 | |
---|
3281 | assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); |
---|
3282 | assert(blk->len > 0); |
---|
3283 | assert(blk->len < (int) sizeof(blk->buf)); |
---|
3284 | } |
---|
3285 | |
---|
3286 | static void |
---|
3287 | send_cgi(struct mg_connection *conn, const char *prog) |
---|
3288 | { |
---|
3289 | int headers_len, data_len, i; |
---|
3290 | const char *status; |
---|
3291 | char buf[MAX_REQUEST_SIZE], *pbuf; |
---|
3292 | struct mg_request_info ri; |
---|
3293 | struct cgi_env_block blk; |
---|
3294 | char dir[FILENAME_MAX], *p; |
---|
3295 | int fd_stdin[2], fd_stdout[2]; |
---|
3296 | FILE *in, *out; |
---|
3297 | pid_t pid; |
---|
3298 | |
---|
3299 | prepare_cgi_environment(conn, prog, &blk); |
---|
3300 | |
---|
3301 | /* CGI must be executed in its own directory */ |
---|
3302 | (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog); |
---|
3303 | if ((p = strrchr(dir, DIRSEP)) != NULL) |
---|
3304 | *p++ = '\0'; |
---|
3305 | |
---|
3306 | pid = (pid_t) -1; |
---|
3307 | fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1; |
---|
3308 | in = out = NULL; |
---|
3309 | |
---|
3310 | if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) { |
---|
3311 | send_error(conn, 500, http_500_error, |
---|
3312 | "Cannot create CGI pipe: %s", strerror(ERRNO)); |
---|
3313 | goto done; |
---|
3314 | } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars, |
---|
3315 | fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) { |
---|
3316 | goto done; |
---|
3317 | } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL || |
---|
3318 | (out = fdopen(fd_stdout[0], "rb")) == NULL) { |
---|
3319 | send_error(conn, 500, http_500_error, |
---|
3320 | "fopen: %s", strerror(ERRNO)); |
---|
3321 | goto done; |
---|
3322 | } |
---|
3323 | |
---|
3324 | setbuf(in, NULL); |
---|
3325 | setbuf(out, NULL); |
---|
3326 | |
---|
3327 | /* |
---|
3328 | * spawn_process() must close those! |
---|
3329 | * If we don't mark them as closed, close() attempt before |
---|
3330 | * return from this function throws an exception on Windows. |
---|
3331 | * Windows does not like when closed descriptor is closed again. |
---|
3332 | */ |
---|
3333 | fd_stdin[0] = fd_stdout[1] = -1; |
---|
3334 | |
---|
3335 | /* Send POST data to the CGI process if needed */ |
---|
3336 | if (!strcmp(conn->request_info.request_method, "POST") && |
---|
3337 | !handle_request_body(conn, in)) { |
---|
3338 | goto done; |
---|
3339 | } |
---|
3340 | |
---|
3341 | /* |
---|
3342 | * Now read CGI reply into a buffer. We need to set correct |
---|
3343 | * status code, thus we need to see all HTTP headers first. |
---|
3344 | * Do not send anything back to client, until we buffer in all |
---|
3345 | * HTTP headers. |
---|
3346 | */ |
---|
3347 | data_len = 0; |
---|
3348 | headers_len = read_request(out, INVALID_SOCKET, NULL, |
---|
3349 | buf, sizeof(buf), &data_len); |
---|
3350 | if (headers_len <= 0) { |
---|
3351 | send_error(conn, 500, http_500_error, |
---|
3352 | "CGI program sent malformed HTTP headers: [%.*s]", |
---|
3353 | data_len, buf); |
---|
3354 | goto done; |
---|
3355 | } |
---|
3356 | pbuf = buf; |
---|
3357 | buf[headers_len - 1] = '\0'; |
---|
3358 | parse_http_headers(&pbuf, &ri); |
---|
3359 | |
---|
3360 | /* Make up and send the status line */ |
---|
3361 | status = get_header(&ri, "Status"); |
---|
3362 | conn->request_info.status_code = status == NULL ? 200 : atoi(status); |
---|
3363 | (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n", |
---|
3364 | conn->request_info.status_code); |
---|
3365 | |
---|
3366 | /* Send headers */ |
---|
3367 | for (i = 0; i < ri.num_headers; i++) |
---|
3368 | (void) mg_printf(conn, "%s: %s\r\n", |
---|
3369 | ri.http_headers[i].name, |
---|
3370 | ri.http_headers[i].value); |
---|
3371 | (void) mg_write(conn, "\r\n", 2); |
---|
3372 | |
---|
3373 | /* Send chunk of data that may be read after the headers */ |
---|
3374 | conn->num_bytes_sent += mg_write(conn, |
---|
3375 | buf + headers_len, data_len - headers_len); |
---|
3376 | |
---|
3377 | /* Read the rest of CGI output and send to the client */ |
---|
3378 | send_opened_file_stream(conn, out, INT64_MAX); |
---|
3379 | |
---|
3380 | done: |
---|
3381 | if (pid != (pid_t) -1) |
---|
3382 | kill(pid, SIGTERM); |
---|
3383 | if (fd_stdin[0] != -1) |
---|
3384 | (void) close(fd_stdin[0]); |
---|
3385 | if (fd_stdout[1] != -1) |
---|
3386 | (void) close(fd_stdout[1]); |
---|
3387 | |
---|
3388 | if (in != NULL) |
---|
3389 | (void) fclose(in); |
---|
3390 | else if (fd_stdin[1] != -1) |
---|
3391 | (void) close(fd_stdin[1]); |
---|
3392 | |
---|
3393 | if (out != NULL) |
---|
3394 | (void) fclose(out); |
---|
3395 | else if (fd_stdout[0] != -1) |
---|
3396 | (void) close(fd_stdout[0]); |
---|
3397 | } |
---|
3398 | #endif /* !NO_CGI */ |
---|
3399 | |
---|
3400 | /* |
---|
3401 | * For a given PUT path, create all intermediate subdirectories |
---|
3402 | * for given path. Return 0 if the path itself is a directory, |
---|
3403 | * or -1 on error, 1 if OK. |
---|
3404 | */ |
---|
3405 | static int |
---|
3406 | put_dir(const char *path) |
---|
3407 | { |
---|
3408 | char buf[FILENAME_MAX]; |
---|
3409 | const char *s, *p; |
---|
3410 | struct mgstat st; |
---|
3411 | size_t len; |
---|
3412 | |
---|
3413 | for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) { |
---|
3414 | len = p - path; |
---|
3415 | assert(len < sizeof(buf)); |
---|
3416 | (void) memcpy(buf, path, len); |
---|
3417 | buf[len] = '\0'; |
---|
3418 | |
---|
3419 | /* Try to create intermediate directory */ |
---|
3420 | if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) |
---|
3421 | return (-1); |
---|
3422 | |
---|
3423 | /* Is path itself a directory ? */ |
---|
3424 | if (p[1] == '\0') |
---|
3425 | return (0); |
---|
3426 | } |
---|
3427 | |
---|
3428 | return (1); |
---|
3429 | } |
---|
3430 | |
---|
3431 | static void |
---|
3432 | put_file(struct mg_connection *conn, const char *path) |
---|
3433 | { |
---|
3434 | struct mgstat st; |
---|
3435 | FILE *fp; |
---|
3436 | int rc; |
---|
3437 | |
---|
3438 | conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201; |
---|
3439 | |
---|
3440 | if (mg_get_header(conn, "Range")) { |
---|
3441 | send_error(conn, 501, "Not Implemented", |
---|
3442 | "%s", "Range support for PUT requests is not implemented"); |
---|
3443 | } else if ((rc = put_dir(path)) == 0) { |
---|
3444 | (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", |
---|
3445 | conn->request_info.status_code); |
---|
3446 | } else if (rc == -1) { |
---|
3447 | send_error(conn, 500, http_500_error, |
---|
3448 | "put_dir(%s): %s", path, strerror(ERRNO)); |
---|
3449 | } else if ((fp = mg_fopen(path, "wb+")) == NULL) { |
---|
3450 | send_error(conn, 500, http_500_error, |
---|
3451 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
3452 | } else { |
---|
3453 | set_close_on_exec(fileno(fp)); |
---|
3454 | if (handle_request_body(conn, fp)) |
---|
3455 | (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", |
---|
3456 | conn->request_info.status_code); |
---|
3457 | (void) fclose(fp); |
---|
3458 | } |
---|
3459 | } |
---|
3460 | |
---|
3461 | #if !defined(NO_SSI) |
---|
3462 | static void send_ssi_file(struct mg_connection *, const char *, FILE *, int); |
---|
3463 | |
---|
3464 | static void |
---|
3465 | do_ssi_include(struct mg_connection *conn, const char *ssi, char *tag, |
---|
3466 | int include_level) |
---|
3467 | { |
---|
3468 | char file_name[BUFSIZ], path[FILENAME_MAX], *p; |
---|
3469 | FILE *fp; |
---|
3470 | |
---|
3471 | /* |
---|
3472 | * sscanf() is safe here, since send_ssi_file() also uses buffer |
---|
3473 | * of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ. |
---|
3474 | */ |
---|
3475 | if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { |
---|
3476 | /* File name is relative to the webserver root */ |
---|
3477 | lock_option(conn->ctx, OPT_ROOT); |
---|
3478 | (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
---|
3479 | conn->ctx->options[OPT_ROOT], DIRSEP, file_name); |
---|
3480 | unlock_option(conn->ctx, OPT_ROOT); |
---|
3481 | } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) { |
---|
3482 | /* |
---|
3483 | * File name is relative to the webserver working directory |
---|
3484 | * or it is absolute system path |
---|
3485 | */ |
---|
3486 | (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name); |
---|
3487 | } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) { |
---|
3488 | /* File name is relative to the currect document */ |
---|
3489 | (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi); |
---|
3490 | if ((p = strrchr(path, DIRSEP)) != NULL) |
---|
3491 | p[1] = '\0'; |
---|
3492 | (void) mg_snprintf(conn, path + strlen(path), |
---|
3493 | sizeof(path) - strlen(path), "%s", file_name); |
---|
3494 | } else { |
---|
3495 | cry(conn, "Bad SSI #include: [%s]", tag); |
---|
3496 | return; |
---|
3497 | } |
---|
3498 | |
---|
3499 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
3500 | cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", |
---|
3501 | tag, path, strerror(ERRNO)); |
---|
3502 | } else { |
---|
3503 | set_close_on_exec(fileno(fp)); |
---|
3504 | if (match_extension(path, |
---|
3505 | conn->ctx->options[OPT_SSI_EXTENSIONS])) { |
---|
3506 | send_ssi_file(conn, path, fp, include_level + 1); |
---|
3507 | } else { |
---|
3508 | send_opened_file_stream(conn, fp, INT64_MAX); |
---|
3509 | } |
---|
3510 | (void) fclose(fp); |
---|
3511 | } |
---|
3512 | } |
---|
3513 | |
---|
3514 | static void |
---|
3515 | do_ssi_exec(struct mg_connection *conn, char *tag) |
---|
3516 | { |
---|
3517 | char cmd[BUFSIZ]; |
---|
3518 | FILE *fp; |
---|
3519 | |
---|
3520 | if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { |
---|
3521 | cry(conn, "Bad SSI #exec: [%s]", tag); |
---|
3522 | } else if ((fp = popen(cmd, "r")) == NULL) { |
---|
3523 | cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO)); |
---|
3524 | } else { |
---|
3525 | send_opened_file_stream(conn, fp, INT64_MAX); |
---|
3526 | (void) pclose(fp); |
---|
3527 | } |
---|
3528 | } |
---|
3529 | |
---|
3530 | static void |
---|
3531 | send_ssi_file(struct mg_connection *conn, const char *path, FILE *fp, |
---|
3532 | int include_level) |
---|
3533 | { |
---|
3534 | char buf[BUFSIZ]; |
---|
3535 | int ch, len, in_ssi_tag; |
---|
3536 | |
---|
3537 | if (include_level > 10) { |
---|
3538 | cry(conn, "SSI #include level is too deep (%s)", path); |
---|
3539 | return; |
---|
3540 | } |
---|
3541 | |
---|
3542 | in_ssi_tag = FALSE; |
---|
3543 | len = 0; |
---|
3544 | |
---|
3545 | while ((ch = fgetc(fp)) != EOF) { |
---|
3546 | if (in_ssi_tag && ch == '>') { |
---|
3547 | in_ssi_tag = FALSE; |
---|
3548 | buf[len++] = ch & 0xff; |
---|
3549 | buf[len] = '\0'; |
---|
3550 | assert(len <= (int) sizeof(buf)); |
---|
3551 | if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { |
---|
3552 | /* Not an SSI tag, pass it */ |
---|
3553 | (void) mg_write(conn, buf, len); |
---|
3554 | } else { |
---|
3555 | if (!memcmp(buf + 5, "include", 7)) { |
---|
3556 | do_ssi_include(conn, path, buf + 12, |
---|
3557 | include_level); |
---|
3558 | } else if (!memcmp(buf + 5, "exec", 4)) { |
---|
3559 | do_ssi_exec(conn, buf + 9); |
---|
3560 | } else { |
---|
3561 | cry(conn, "%s: unknown SSI " |
---|
3562 | "command: \"%s\"", path, buf); |
---|
3563 | } |
---|
3564 | } |
---|
3565 | len = 0; |
---|
3566 | } else if (in_ssi_tag) { |
---|
3567 | if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { |
---|
3568 | /* Not an SSI tag */ |
---|
3569 | in_ssi_tag = FALSE; |
---|
3570 | } else if (len == (int) sizeof(buf) - 2) { |
---|
3571 | cry(conn, "%s: SSI tag is too large", path); |
---|
3572 | len = 0; |
---|
3573 | } |
---|
3574 | buf[len++] = ch & 0xff; |
---|
3575 | } else if (ch == '<') { |
---|
3576 | in_ssi_tag = TRUE; |
---|
3577 | if (len > 0) |
---|
3578 | (void) mg_write(conn, buf, len); |
---|
3579 | len = 0; |
---|
3580 | buf[len++] = ch & 0xff; |
---|
3581 | } else { |
---|
3582 | buf[len++] = ch & 0xff; |
---|
3583 | if (len == (int) sizeof(buf)) { |
---|
3584 | (void) mg_write(conn, buf, len); |
---|
3585 | len = 0; |
---|
3586 | } |
---|
3587 | } |
---|
3588 | } |
---|
3589 | |
---|
3590 | /* Send the rest of buffered data */ |
---|
3591 | if (len > 0) |
---|
3592 | (void) mg_write(conn, buf, len); |
---|
3593 | |
---|
3594 | } |
---|
3595 | |
---|
3596 | static void |
---|
3597 | send_ssi(struct mg_connection *conn, const char *path) |
---|
3598 | { |
---|
3599 | FILE *fp; |
---|
3600 | |
---|
3601 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
3602 | send_error(conn, 500, http_500_error, |
---|
3603 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
3604 | } else { |
---|
3605 | set_close_on_exec(fileno(fp)); |
---|
3606 | (void) mg_printf(conn, "%s", "HTTP/1.1 200 OK\r\n" |
---|
3607 | "Content-Type: text/html\r\nConnection: close\r\n\r\n"); |
---|
3608 | send_ssi_file(conn, path, fp, 0); |
---|
3609 | (void) fclose(fp); |
---|
3610 | } |
---|
3611 | } |
---|
3612 | #endif /* !NO_SSI */ |
---|
3613 | |
---|
3614 | void |
---|
3615 | mg_authorize(struct mg_connection *conn) |
---|
3616 | { |
---|
3617 | conn->embedded_auth = TRUE; |
---|
3618 | } |
---|
3619 | |
---|
3620 | static bool_t |
---|
3621 | check_embedded_authorization(struct mg_connection *conn) |
---|
3622 | { |
---|
3623 | const struct callback *cb; |
---|
3624 | bool_t authorized; |
---|
3625 | |
---|
3626 | authorized = TRUE; |
---|
3627 | cb = find_callback(conn->ctx, TRUE, conn->request_info.uri, -1); |
---|
3628 | |
---|
3629 | if (cb != NULL) { |
---|
3630 | cb->func(conn, &conn->request_info, cb->user_data); |
---|
3631 | authorized = conn->embedded_auth; |
---|
3632 | } |
---|
3633 | |
---|
3634 | return (authorized); |
---|
3635 | } |
---|
3636 | |
---|
3637 | /* |
---|
3638 | * This is the heart of the Mongoose's logic. |
---|
3639 | * This function is called when the request is read, parsed and validated, |
---|
3640 | * and Mongoose must decide what action to take: serve a file, or |
---|
3641 | * a directory, or call embedded function, etcetera. |
---|
3642 | */ |
---|
3643 | static void |
---|
3644 | analyze_request(struct mg_connection *conn) |
---|
3645 | { |
---|
3646 | struct mg_request_info *ri = &conn->request_info; |
---|
3647 | char path[FILENAME_MAX], *uri = ri->uri; |
---|
3648 | struct mgstat st; |
---|
3649 | const struct callback *cb; |
---|
3650 | |
---|
3651 | if ((conn->request_info.query_string = strchr(uri, '?')) != NULL) |
---|
3652 | * conn->request_info.query_string++ = '\0'; |
---|
3653 | |
---|
3654 | (void) url_decode(uri, (int) strlen(uri), uri, strlen(uri) + 1, FALSE); |
---|
3655 | remove_double_dots_and_double_slashes(uri); |
---|
3656 | convert_uri_to_file_name(conn, uri, path, sizeof(path)); |
---|
3657 | |
---|
3658 | if (!check_authorization(conn, path)) { |
---|
3659 | send_authorization_request(conn); |
---|
3660 | } else if (check_embedded_authorization(conn) == FALSE) { |
---|
3661 | /* |
---|
3662 | * Embedded code failed authorization. Do nothing here, since |
---|
3663 | * an embedded code must handle this itself by either |
---|
3664 | * showing proper error message, or redirecting to some |
---|
3665 | * sort of login page, or something else. |
---|
3666 | */ |
---|
3667 | } else if ((cb = find_callback(conn->ctx, FALSE, uri, -1)) != NULL) { |
---|
3668 | if ((strcmp(ri->request_method, "POST") != 0 && |
---|
3669 | strcmp(ri->request_method, "PUT") != 0) || |
---|
3670 | handle_request_body(conn, NULL)) |
---|
3671 | cb->func(conn, &conn->request_info, cb->user_data); |
---|
3672 | } else if (strstr(path, PASSWORDS_FILE_NAME)) { |
---|
3673 | /* Do not allow to view passwords files */ |
---|
3674 | send_error(conn, 403, "Forbidden", "Access Forbidden"); |
---|
3675 | } else if ((!strcmp(ri->request_method, "PUT") || |
---|
3676 | !strcmp(ri->request_method, "DELETE")) && |
---|
3677 | (conn->ctx->options[OPT_AUTH_PUT] == NULL || |
---|
3678 | !is_authorized_for_put(conn))) { |
---|
3679 | send_authorization_request(conn); |
---|
3680 | } else if (!strcmp(ri->request_method, "PUT")) { |
---|
3681 | put_file(conn, path); |
---|
3682 | } else if (!strcmp(ri->request_method, "DELETE")) { |
---|
3683 | if (mg_remove(path) == 0) |
---|
3684 | send_error(conn, 200, "OK", ""); |
---|
3685 | else |
---|
3686 | send_error(conn, 500, http_500_error, |
---|
3687 | "remove(%s): %s", path, strerror(ERRNO)); |
---|
3688 | } else if (mg_stat(path, &st) != 0) { |
---|
3689 | send_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
3690 | } else if (st.is_directory && uri[strlen(uri) - 1] != '/') { |
---|
3691 | (void) mg_printf(conn, |
---|
3692 | "HTTP/1.1 301 Moved Permanently\r\n" |
---|
3693 | "Location: %s/\r\n\r\n", uri); |
---|
3694 | } else if (st.is_directory && |
---|
3695 | substitute_index_file(conn, path, sizeof(path), &st) == FALSE) { |
---|
3696 | if (is_true(conn->ctx->options[OPT_DIR_LIST])) { |
---|
3697 | send_directory(conn, path); |
---|
3698 | } else { |
---|
3699 | send_error(conn, 403, "Directory Listing Denied", |
---|
3700 | "Directory listing denied"); |
---|
3701 | } |
---|
3702 | #if !defined(NO_CGI) |
---|
3703 | } else if (match_extension(path, |
---|
3704 | conn->ctx->options[OPT_CGI_EXTENSIONS])) { |
---|
3705 | if (strcmp(ri->request_method, "POST") && |
---|
3706 | strcmp(ri->request_method, "GET")) { |
---|
3707 | send_error(conn, 501, "Not Implemented", |
---|
3708 | "Method %s is not implemented", ri->request_method); |
---|
3709 | } else { |
---|
3710 | send_cgi(conn, path); |
---|
3711 | } |
---|
3712 | #endif /* NO_CGI */ |
---|
3713 | #if !defined(NO_SSI) |
---|
3714 | } else if (match_extension(path, |
---|
3715 | conn->ctx->options[OPT_SSI_EXTENSIONS])) { |
---|
3716 | send_ssi(conn, path); |
---|
3717 | #endif /* NO_SSI */ |
---|
3718 | } else if (is_not_modified(conn, &st)) { |
---|
3719 | send_error(conn, 304, "Not Modified", ""); |
---|
3720 | } else { |
---|
3721 | send_file(conn, path, &st); |
---|
3722 | } |
---|
3723 | } |
---|
3724 | |
---|
3725 | static void |
---|
3726 | close_all_listening_sockets(struct mg_context *ctx) |
---|
3727 | { |
---|
3728 | int i; |
---|
3729 | |
---|
3730 | for (i = 0; i < ctx->num_listeners; i++) |
---|
3731 | (void) closesocket(ctx->listeners[i].sock); |
---|
3732 | ctx->num_listeners = 0; |
---|
3733 | } |
---|
3734 | |
---|
3735 | static bool_t |
---|
3736 | set_ports_option(struct mg_context *ctx, const char *list) |
---|
3737 | { |
---|
3738 | SOCKET sock; |
---|
3739 | int is_ssl; |
---|
3740 | struct vec vec; |
---|
3741 | struct socket *listener; |
---|
3742 | |
---|
3743 | close_all_listening_sockets(ctx); |
---|
3744 | assert(ctx->num_listeners == 0); |
---|
3745 | |
---|
3746 | while ((list = next_option(list, &vec, NULL)) != NULL) { |
---|
3747 | |
---|
3748 | is_ssl = vec.ptr[vec.len - 1] == 's' ? TRUE : FALSE; |
---|
3749 | listener = ctx->listeners + ctx->num_listeners; |
---|
3750 | |
---|
3751 | if (ctx->num_listeners >= |
---|
3752 | (int) (ARRAY_SIZE(ctx->listeners) - 1)) { |
---|
3753 | cry(fc(ctx), "%s", "Too many listeninig sockets"); |
---|
3754 | return (FALSE); |
---|
3755 | } else if ((sock = mg_open_listening_port(ctx, |
---|
3756 | vec.ptr, &listener->lsa)) == INVALID_SOCKET) { |
---|
3757 | cry(fc(ctx), "cannot bind to %.*s", vec.len, vec.ptr); |
---|
3758 | return (FALSE); |
---|
3759 | } else if (is_ssl == TRUE && ctx->ssl_ctx == NULL) { |
---|
3760 | (void) closesocket(sock); |
---|
3761 | cry(fc(ctx), "cannot add SSL socket, please specify " |
---|
3762 | "-ssl_cert option BEFORE -ports option"); |
---|
3763 | return (FALSE); |
---|
3764 | } else { |
---|
3765 | listener->sock = sock; |
---|
3766 | listener->is_ssl = is_ssl; |
---|
3767 | ctx->num_listeners++; |
---|
3768 | } |
---|
3769 | } |
---|
3770 | |
---|
3771 | return (TRUE); |
---|
3772 | } |
---|
3773 | |
---|
3774 | static void |
---|
3775 | log_header(const struct mg_connection *conn, const char *header, FILE *fp) |
---|
3776 | { |
---|
3777 | const char *header_value; |
---|
3778 | |
---|
3779 | if ((header_value = mg_get_header(conn, header)) == NULL) { |
---|
3780 | (void) fprintf(fp, "%s", " -"); |
---|
3781 | } else { |
---|
3782 | (void) fprintf(fp, " \"%s\"", header_value); |
---|
3783 | } |
---|
3784 | } |
---|
3785 | |
---|
3786 | static void |
---|
3787 | log_access(const struct mg_connection *conn) |
---|
3788 | { |
---|
3789 | const struct mg_request_info *ri; |
---|
3790 | char date[64]; |
---|
3791 | |
---|
3792 | if (conn->ctx->access_log == NULL) |
---|
3793 | return; |
---|
3794 | |
---|
3795 | (void) strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", |
---|
3796 | localtime(&conn->birth_time)); |
---|
3797 | |
---|
3798 | ri = &conn->request_info; |
---|
3799 | |
---|
3800 | flockfile(conn->ctx->access_log); |
---|
3801 | |
---|
3802 | (void) fprintf(conn->ctx->access_log, |
---|
3803 | "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT, |
---|
3804 | inet_ntoa(conn->client.rsa.u.sin.sin_addr), |
---|
3805 | ri->remote_user == NULL ? "-" : ri->remote_user, |
---|
3806 | date, |
---|
3807 | ri->request_method ? ri->request_method : "-", |
---|
3808 | ri->uri ? ri->uri : "-", |
---|
3809 | ri->http_version, |
---|
3810 | conn->request_info.status_code, conn->num_bytes_sent); |
---|
3811 | log_header(conn, "Referer", conn->ctx->access_log); |
---|
3812 | log_header(conn, "User-Agent", conn->ctx->access_log); |
---|
3813 | (void) fputc('\n', conn->ctx->access_log); |
---|
3814 | (void) fflush(conn->ctx->access_log); |
---|
3815 | |
---|
3816 | funlockfile(conn->ctx->access_log); |
---|
3817 | } |
---|
3818 | |
---|
3819 | static bool_t |
---|
3820 | isbyte(int n) { |
---|
3821 | return (n >= 0 && n <= 255); |
---|
3822 | } |
---|
3823 | |
---|
3824 | /* |
---|
3825 | * Verify given socket address against the ACL. |
---|
3826 | * Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. |
---|
3827 | */ |
---|
3828 | static int |
---|
3829 | check_acl(struct mg_context *ctx, const char *list, const struct usa *usa) |
---|
3830 | { |
---|
3831 | int a, b, c, d, n, mask, allowed; |
---|
3832 | char flag; |
---|
3833 | uint32_t acl_subnet, acl_mask, remote_ip; |
---|
3834 | struct vec vec; |
---|
3835 | |
---|
3836 | (void) memcpy(&remote_ip, &usa->u.sin.sin_addr, sizeof(remote_ip)); |
---|
3837 | |
---|
3838 | /* If any ACL is set, deny by default */ |
---|
3839 | allowed = '-'; |
---|
3840 | |
---|
3841 | while ((list = next_option(list, &vec, NULL)) != NULL) { |
---|
3842 | |
---|
3843 | mask = 32; |
---|
3844 | |
---|
3845 | if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", |
---|
3846 | &flag, &a, &b, &c, &d, &n) != 5) { |
---|
3847 | cry(fc(ctx), |
---|
3848 | "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); |
---|
3849 | return (-1); |
---|
3850 | } else if (flag != '+' && flag != '-') { |
---|
3851 | cry(fc(ctx), "%s: flag must be + or -: [%s]", |
---|
3852 | __func__, vec.ptr); |
---|
3853 | return (-1); |
---|
3854 | } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) { |
---|
3855 | cry(fc(ctx), |
---|
3856 | "%s: bad ip address: [%s]", __func__, vec.ptr); |
---|
3857 | return (-1); |
---|
3858 | } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) { |
---|
3859 | /* Do nothing, no mask specified */ |
---|
3860 | } else if (mask < 0 || mask > 32) { |
---|
3861 | cry(fc(ctx), "%s: bad subnet mask: %d [%s]", |
---|
3862 | __func__, n, vec.ptr); |
---|
3863 | return (-1); |
---|
3864 | } |
---|
3865 | |
---|
3866 | acl_subnet = (a << 24) | (b << 16) | (c << 8) | d; |
---|
3867 | acl_mask = mask ? 0xffffffffU << (32 - mask) : 0; |
---|
3868 | |
---|
3869 | if (acl_subnet == (ntohl(remote_ip) & acl_mask)) |
---|
3870 | allowed = flag; |
---|
3871 | } |
---|
3872 | |
---|
3873 | return (allowed == '+' ? 1 : 0); |
---|
3874 | } |
---|
3875 | |
---|
3876 | static void |
---|
3877 | add_to_set(SOCKET fd, fd_set *set, int *max_fd) |
---|
3878 | { |
---|
3879 | FD_SET(fd, set); |
---|
3880 | if (fd > (SOCKET) *max_fd) |
---|
3881 | *max_fd = (int) fd; |
---|
3882 | } |
---|
3883 | |
---|
3884 | /* |
---|
3885 | * Deallocate mongoose context, free up the resources |
---|
3886 | */ |
---|
3887 | static void |
---|
3888 | mg_fini(struct mg_context *ctx) |
---|
3889 | { |
---|
3890 | int i; |
---|
3891 | |
---|
3892 | close_all_listening_sockets(ctx); |
---|
3893 | |
---|
3894 | /* Wait until all threads finish */ |
---|
3895 | (void) pthread_mutex_lock(&ctx->thr_mutex); |
---|
3896 | while (ctx->num_threads > 0) |
---|
3897 | (void) pthread_cond_wait(&ctx->thr_cond, &ctx->thr_mutex); |
---|
3898 | (void) pthread_mutex_unlock(&ctx->thr_mutex); |
---|
3899 | |
---|
3900 | /* Deallocate all registered callbacks */ |
---|
3901 | for (i = 0; i < ctx->num_callbacks; i++) |
---|
3902 | if (ctx->callbacks[i].uri_regex != NULL) |
---|
3903 | free(ctx->callbacks[i].uri_regex); |
---|
3904 | |
---|
3905 | /* Deallocate all options */ |
---|
3906 | for (i = 0; i < NUM_OPTIONS; i++) |
---|
3907 | if (ctx->options[i] != NULL) |
---|
3908 | free(ctx->options[i]); |
---|
3909 | |
---|
3910 | /* Close log files */ |
---|
3911 | if (ctx->access_log) |
---|
3912 | (void) fclose(ctx->access_log); |
---|
3913 | if (ctx->error_log) |
---|
3914 | (void) fclose(ctx->error_log); |
---|
3915 | |
---|
3916 | /* Deallocate SSL context */ |
---|
3917 | if (ctx->ssl_ctx) |
---|
3918 | SSL_CTX_free(ctx->ssl_ctx); |
---|
3919 | |
---|
3920 | /* Deallocate mutexes and condvars */ |
---|
3921 | for (i = 0; i < NUM_OPTIONS; i++) |
---|
3922 | (void) pthread_mutex_destroy(&ctx->opt_mutex[i]); |
---|
3923 | |
---|
3924 | (void) pthread_mutex_destroy(&ctx->thr_mutex); |
---|
3925 | (void) pthread_mutex_destroy(&ctx->bind_mutex); |
---|
3926 | (void) pthread_cond_destroy(&ctx->thr_cond); |
---|
3927 | (void) pthread_cond_destroy(&ctx->empty_cond); |
---|
3928 | (void) pthread_cond_destroy(&ctx->full_cond); |
---|
3929 | |
---|
3930 | /* Signal mg_stop() that we're done */ |
---|
3931 | ctx->stop_flag = 2; |
---|
3932 | } |
---|
3933 | |
---|
3934 | #if !defined(_WIN32) |
---|
3935 | static bool_t |
---|
3936 | set_uid_option(struct mg_context *ctx, const char *uid) |
---|
3937 | { |
---|
3938 | struct passwd *pw; |
---|
3939 | int retval = FALSE; |
---|
3940 | |
---|
3941 | if ((pw = getpwnam(uid)) == NULL) |
---|
3942 | cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); |
---|
3943 | else if (setgid(pw->pw_gid) == -1) |
---|
3944 | cry(fc(ctx), "%s: setgid(%s): %s", |
---|
3945 | __func__, uid, strerror(errno)); |
---|
3946 | else if (setuid(pw->pw_uid) == -1) |
---|
3947 | cry(fc(ctx), "%s: setuid(%s): %s", |
---|
3948 | __func__, uid, strerror(errno)); |
---|
3949 | else |
---|
3950 | retval = TRUE; |
---|
3951 | |
---|
3952 | return (retval); |
---|
3953 | } |
---|
3954 | #endif /* !_WIN32 */ |
---|
3955 | |
---|
3956 | #if !defined(NO_SSL) |
---|
3957 | void |
---|
3958 | mg_set_ssl_password_callback(struct mg_context *ctx, mg_spcb_t func) |
---|
3959 | { |
---|
3960 | ctx->ssl_password_callback = func; |
---|
3961 | } |
---|
3962 | |
---|
3963 | static pthread_mutex_t *ssl_mutexes; |
---|
3964 | |
---|
3965 | static void |
---|
3966 | ssl_locking_callback(int mode, int mutex_num, const char *file, int line) |
---|
3967 | { |
---|
3968 | line = 0; /* Unused */ |
---|
3969 | file = NULL; /* Unused */ |
---|
3970 | |
---|
3971 | if (mode & CRYPTO_LOCK) |
---|
3972 | (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]); |
---|
3973 | else |
---|
3974 | (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]); |
---|
3975 | } |
---|
3976 | |
---|
3977 | static unsigned long |
---|
3978 | ssl_id_callback(void) |
---|
3979 | { |
---|
3980 | return ((unsigned long) pthread_self()); |
---|
3981 | } |
---|
3982 | |
---|
3983 | static bool_t |
---|
3984 | load_dll(struct mg_context *ctx, const char *dll_name, struct ssl_func *sw) |
---|
3985 | { |
---|
3986 | union {void *p; void (*fp)(void);} u; |
---|
3987 | void *dll_handle; |
---|
3988 | struct ssl_func *fp; |
---|
3989 | |
---|
3990 | if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) { |
---|
3991 | cry(fc(ctx), "%s: cannot load %s", __func__, dll_name); |
---|
3992 | return (FALSE); |
---|
3993 | } |
---|
3994 | |
---|
3995 | for (fp = sw; fp->name != NULL; fp++) { |
---|
3996 | #ifdef _WIN32 |
---|
3997 | /* GetProcAddress() returns pointer to function */ |
---|
3998 | u.fp = (void (*)(void)) dlsym(dll_handle, fp->name); |
---|
3999 | #else |
---|
4000 | /* |
---|
4001 | * dlsym() on UNIX returns void *. |
---|
4002 | * ISO C forbids casts of data pointers to function |
---|
4003 | * pointers. We need to use a union to make a cast. |
---|
4004 | */ |
---|
4005 | u.p = dlsym(dll_handle, fp->name); |
---|
4006 | #endif /* _WIN32 */ |
---|
4007 | if (u.fp == NULL) { |
---|
4008 | cry(fc(ctx), "%s: cannot find %s", __func__, fp->name); |
---|
4009 | return (FALSE); |
---|
4010 | } else { |
---|
4011 | fp->ptr = u.fp; |
---|
4012 | } |
---|
4013 | } |
---|
4014 | |
---|
4015 | return (TRUE); |
---|
4016 | } |
---|
4017 | |
---|
4018 | /* |
---|
4019 | * Dynamically load SSL library. Set up ctx->ssl_ctx pointer. |
---|
4020 | */ |
---|
4021 | static bool_t |
---|
4022 | set_ssl_option(struct mg_context *ctx, const char *pem) |
---|
4023 | { |
---|
4024 | SSL_CTX *CTX; |
---|
4025 | int i, size, retval = FALSE; |
---|
4026 | |
---|
4027 | if (load_dll(ctx, SSL_LIB, ssl_sw) == FALSE || |
---|
4028 | load_dll(ctx, CRYPTO_LIB, crypto_sw) == FALSE) |
---|
4029 | return (FALSE); |
---|
4030 | |
---|
4031 | /* Initialize SSL crap */ |
---|
4032 | SSL_library_init(); |
---|
4033 | |
---|
4034 | if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) |
---|
4035 | cry(fc(ctx), "SSL_CTX_new error"); |
---|
4036 | else if (ctx->ssl_password_callback != NULL) |
---|
4037 | SSL_CTX_set_default_passwd_cb(CTX, ctx->ssl_password_callback); |
---|
4038 | |
---|
4039 | if (CTX != NULL && SSL_CTX_use_certificate_file( |
---|
4040 | CTX, pem, SSL_FILETYPE_PEM) == 0) |
---|
4041 | cry(fc(ctx), "%s: cannot open %s", __func__, pem); |
---|
4042 | else if (CTX != NULL && SSL_CTX_use_PrivateKey_file( |
---|
4043 | CTX, pem, SSL_FILETYPE_PEM) == 0) |
---|
4044 | cry(fc(ctx), "%s: cannot open %s", NULL, pem); |
---|
4045 | else |
---|
4046 | retval = TRUE; |
---|
4047 | |
---|
4048 | /* |
---|
4049 | * Initialize locking callbacks, needed for thread safety. |
---|
4050 | * http://www.openssl.org/support/faq.html#PROG1 |
---|
4051 | */ |
---|
4052 | size = sizeof(pthread_mutex_t) * CRYPTO_num_locks(); |
---|
4053 | if ((ssl_mutexes = (pthread_mutex_t *) malloc(size)) == NULL) { |
---|
4054 | cry(fc(ctx), "%s: cannot allocate mutexes", __func__); |
---|
4055 | return (FALSE); |
---|
4056 | } |
---|
4057 | |
---|
4058 | for (i = 0; i < CRYPTO_num_locks(); i++) |
---|
4059 | pthread_mutex_init(&ssl_mutexes[i], NULL); |
---|
4060 | |
---|
4061 | CRYPTO_set_locking_callback(&ssl_locking_callback); |
---|
4062 | CRYPTO_set_id_callback(&ssl_id_callback); |
---|
4063 | |
---|
4064 | /* Done with everything. Save the context. */ |
---|
4065 | ctx->ssl_ctx = CTX; |
---|
4066 | |
---|
4067 | return (retval); |
---|
4068 | } |
---|
4069 | #endif /* !NO_SSL */ |
---|
4070 | |
---|
4071 | static bool_t |
---|
4072 | open_log_file(struct mg_context *ctx, FILE **fpp, const char *path) |
---|
4073 | { |
---|
4074 | bool_t retval = TRUE; |
---|
4075 | |
---|
4076 | if (*fpp != NULL) |
---|
4077 | (void) fclose(*fpp); |
---|
4078 | |
---|
4079 | if (path == NULL) { |
---|
4080 | *fpp = NULL; |
---|
4081 | } else if ((*fpp = mg_fopen(path, "a")) == NULL) { |
---|
4082 | cry(fc(ctx), "%s(%s): %s", __func__, path, strerror(errno)); |
---|
4083 | retval = FALSE; |
---|
4084 | } else { |
---|
4085 | set_close_on_exec(fileno(*fpp)); |
---|
4086 | } |
---|
4087 | |
---|
4088 | return (retval); |
---|
4089 | } |
---|
4090 | |
---|
4091 | static bool_t |
---|
4092 | set_alog_option(struct mg_context *ctx, const char *path) |
---|
4093 | { |
---|
4094 | return (open_log_file(ctx, &ctx->access_log, path)); |
---|
4095 | } |
---|
4096 | |
---|
4097 | static bool_t |
---|
4098 | set_elog_option(struct mg_context *ctx, const char *path) |
---|
4099 | { |
---|
4100 | return (open_log_file(ctx, &ctx->error_log, path)); |
---|
4101 | } |
---|
4102 | |
---|
4103 | static bool_t |
---|
4104 | set_gpass_option(struct mg_context *ctx, const char *path) |
---|
4105 | { |
---|
4106 | struct mgstat mgstat; |
---|
4107 | ctx = NULL; |
---|
4108 | return (mg_stat(path, &mgstat) == 0); |
---|
4109 | } |
---|
4110 | |
---|
4111 | static bool_t |
---|
4112 | set_max_threads_option(struct mg_context *ctx, const char *str) |
---|
4113 | { |
---|
4114 | ctx->max_threads = atoi(str); |
---|
4115 | return (TRUE); |
---|
4116 | } |
---|
4117 | |
---|
4118 | static bool_t |
---|
4119 | set_acl_option(struct mg_context *ctx, const char *acl) |
---|
4120 | { |
---|
4121 | struct usa fake; |
---|
4122 | |
---|
4123 | return (check_acl(ctx, acl, &fake) != -1); |
---|
4124 | } |
---|
4125 | |
---|
4126 | static void admin_page(struct mg_connection *, |
---|
4127 | const struct mg_request_info *, void *); |
---|
4128 | static bool_t |
---|
4129 | set_admin_uri_option(struct mg_context *ctx, const char *uri) |
---|
4130 | { |
---|
4131 | mg_set_uri_callback(ctx, uri, &admin_page, NULL); |
---|
4132 | return (TRUE); |
---|
4133 | } |
---|
4134 | |
---|
4135 | /* |
---|
4136 | * Check if the comma-separated list of options has a format of key-value |
---|
4137 | * pairs: "k1=v1,k2=v2". Return FALSE if any entry has invalid key or value. |
---|
4138 | */ |
---|
4139 | static bool_t |
---|
4140 | set_kv_list_option(struct mg_context *ctx, const char *str) |
---|
4141 | { |
---|
4142 | const char *list; |
---|
4143 | struct vec key, value; |
---|
4144 | |
---|
4145 | list = str; |
---|
4146 | while ((list = next_option(list, &key, &value)) != NULL) |
---|
4147 | if (key.len == 0 || value.len == 0) { |
---|
4148 | cry(fc(ctx), "Invalid list specified: [%s], " |
---|
4149 | "expecting key1=value1,key2=value2,...", str); |
---|
4150 | return (FALSE); |
---|
4151 | } |
---|
4152 | |
---|
4153 | return (TRUE); |
---|
4154 | } |
---|
4155 | |
---|
4156 | static const struct mg_option known_options[] = { |
---|
4157 | {"root", "\tWeb root directory", ".", OPT_ROOT, NULL}, |
---|
4158 | {"index_files", "Index files", "index.html,index.htm,index.cgi", |
---|
4159 | OPT_INDEX_FILES, NULL}, |
---|
4160 | #if !defined(NO_SSL) |
---|
4161 | {"ssl_cert", "SSL certificate file", NULL, |
---|
4162 | OPT_SSL_CERTIFICATE, &set_ssl_option}, |
---|
4163 | #endif /* !NO_SSL */ |
---|
4164 | {"ports", "Listening ports", NULL, |
---|
4165 | OPT_PORTS, &set_ports_option}, |
---|
4166 | {"dir_list", "Directory listing", "yes", |
---|
4167 | OPT_DIR_LIST, NULL}, |
---|
4168 | {"protect", "URI to htpasswd mapping", NULL, |
---|
4169 | OPT_PROTECT, &set_kv_list_option}, |
---|
4170 | #if !defined(NO_CGI) |
---|
4171 | {"cgi_ext", "CGI extensions", ".cgi,.pl,.php", |
---|
4172 | OPT_CGI_EXTENSIONS, NULL}, |
---|
4173 | {"cgi_interp", "CGI interpreter to use with all CGI scripts", NULL, |
---|
4174 | OPT_CGI_INTERPRETER, NULL}, |
---|
4175 | {"cgi_env", "Custom CGI enviroment variables", NULL, |
---|
4176 | OPT_CGI_ENV, &set_kv_list_option}, |
---|
4177 | #endif /* NO_CGI */ |
---|
4178 | {"ssi_ext", "SSI extensions", ".shtml,.shtm", |
---|
4179 | OPT_SSI_EXTENSIONS, NULL}, |
---|
4180 | {"auth_realm", "Authentication domain name", "mydomain.com", |
---|
4181 | OPT_AUTH_DOMAIN, NULL}, |
---|
4182 | {"auth_gpass", "Global passwords file", NULL, |
---|
4183 | OPT_AUTH_GPASSWD, &set_gpass_option}, |
---|
4184 | {"auth_PUT", "PUT,DELETE auth file", NULL, |
---|
4185 | OPT_AUTH_PUT, NULL}, |
---|
4186 | #if !defined(_WIN32) |
---|
4187 | {"uid", "\tRun as user", NULL, OPT_UID, &set_uid_option}, |
---|
4188 | #endif /* !_WIN32 */ |
---|
4189 | {"access_log", "Access log file", NULL, |
---|
4190 | OPT_ACCESS_LOG, &set_alog_option}, |
---|
4191 | {"error_log", "Error log file", NULL, |
---|
4192 | OPT_ERROR_LOG, &set_elog_option}, |
---|
4193 | {"aliases", "Path=URI mappings", NULL, |
---|
4194 | OPT_ALIASES, &set_kv_list_option}, |
---|
4195 | {"admin_uri", "Administration page URI", NULL, |
---|
4196 | OPT_ADMIN_URI, &set_admin_uri_option}, |
---|
4197 | {"acl", "\tAllow/deny IP addresses/subnets", NULL, |
---|
4198 | OPT_ACL, &set_acl_option}, |
---|
4199 | {"max_threads", "Maximum simultaneous threads to spawn", "100", |
---|
4200 | OPT_MAX_THREADS, &set_max_threads_option}, |
---|
4201 | {"idle_time", "Time in seconds connection stays idle", "10", |
---|
4202 | OPT_IDLE_TIME, NULL}, |
---|
4203 | {"mime_types", "Comma separated list of ext=mime_type pairs", NULL, |
---|
4204 | OPT_MIME_TYPES, &set_kv_list_option}, |
---|
4205 | {NULL, NULL, NULL, 0, NULL} |
---|
4206 | }; |
---|
4207 | |
---|
4208 | static const struct mg_option * |
---|
4209 | find_opt(const char *opt_name) |
---|
4210 | { |
---|
4211 | int i; |
---|
4212 | |
---|
4213 | for (i = 0; known_options[i].name != NULL; i++) |
---|
4214 | if (!strcmp(opt_name, known_options[i].name)) |
---|
4215 | return (known_options + i); |
---|
4216 | |
---|
4217 | return (NULL); |
---|
4218 | } |
---|
4219 | |
---|
4220 | int |
---|
4221 | mg_set_option(struct mg_context *ctx, const char *opt, const char *val) |
---|
4222 | { |
---|
4223 | const struct mg_option *option; |
---|
4224 | int i, retval; |
---|
4225 | |
---|
4226 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: [%s]->[%s]", __func__, opt, val)); |
---|
4227 | if (opt != NULL && (option = find_opt(opt)) != NULL) { |
---|
4228 | i = (int) (option - known_options); |
---|
4229 | lock_option(ctx, i); |
---|
4230 | |
---|
4231 | if (option->setter != NULL) |
---|
4232 | retval = option->setter(ctx, val); |
---|
4233 | else |
---|
4234 | retval = TRUE; |
---|
4235 | |
---|
4236 | /* Free old value if any */ |
---|
4237 | if (ctx->options[option->index] != NULL) |
---|
4238 | free(ctx->options[option->index]); |
---|
4239 | |
---|
4240 | /* Set new option value */ |
---|
4241 | ctx->options[option->index] = val ? mg_strdup(val) : NULL; |
---|
4242 | unlock_option(ctx, i); |
---|
4243 | |
---|
4244 | if (retval == FALSE) |
---|
4245 | cry(fc(ctx), "%s(%s): failure", __func__, opt); |
---|
4246 | } else { |
---|
4247 | cry(fc(ctx), "%s: No such option: [%s]", __func__, opt); |
---|
4248 | retval = -1; |
---|
4249 | } |
---|
4250 | |
---|
4251 | return (retval); |
---|
4252 | } |
---|
4253 | |
---|
4254 | void |
---|
4255 | mg_show_usage_string(FILE *fp) |
---|
4256 | { |
---|
4257 | const struct mg_option *o; |
---|
4258 | |
---|
4259 | (void) fprintf(stderr, |
---|
4260 | "Mongoose version %s (c) Sergey Lyubka\n" |
---|
4261 | "usage: mongoose [options] [config_file]\n", mg_version()); |
---|
4262 | |
---|
4263 | fprintf(fp, " -A <htpasswd_file> <realm> <user> <passwd>\n"); |
---|
4264 | |
---|
4265 | for (o = known_options; o->name != NULL; o++) { |
---|
4266 | (void) fprintf(fp, " -%s\t%s", o->name, o->description); |
---|
4267 | if (o->default_value != NULL) |
---|
4268 | fprintf(fp, " (default: \"%s\")", o->default_value); |
---|
4269 | fputc('\n', fp); |
---|
4270 | } |
---|
4271 | } |
---|
4272 | |
---|
4273 | const char * |
---|
4274 | mg_get_option(const struct mg_context *ctx, const char *option_name) |
---|
4275 | { |
---|
4276 | const struct mg_option *option; |
---|
4277 | |
---|
4278 | if ((option = find_opt(option_name)) != NULL) |
---|
4279 | return (ctx->options[option->index]); |
---|
4280 | else |
---|
4281 | return (NULL); |
---|
4282 | } |
---|
4283 | |
---|
4284 | static void |
---|
4285 | admin_page(struct mg_connection *conn, const struct mg_request_info *ri, |
---|
4286 | void *user_data) |
---|
4287 | { |
---|
4288 | const struct mg_option *option; |
---|
4289 | const char *option_name, *option_value; |
---|
4290 | |
---|
4291 | user_data = NULL; /* Unused */ |
---|
4292 | |
---|
4293 | (void) mg_printf(conn, |
---|
4294 | "HTTP/1.1 200 OK\r\n" |
---|
4295 | "Content-Type: text/html\r\n\r\n" |
---|
4296 | "<html><body><h1>Mongoose v. %s</h1>", mg_version()); |
---|
4297 | |
---|
4298 | if (!strcmp(ri->request_method, "POST")) { |
---|
4299 | option_name = mg_get_var(conn, "o"); |
---|
4300 | option_value = mg_get_var(conn, "v"); |
---|
4301 | if (mg_set_option(conn->ctx, |
---|
4302 | option_name, option_value) == -1) { |
---|
4303 | (void) mg_printf(conn, |
---|
4304 | "<p style=\"background: red\">Error setting " |
---|
4305 | "option \"%s\"</p>", |
---|
4306 | option_name ? option_name : "(null)"); |
---|
4307 | } else { |
---|
4308 | (void) mg_printf(conn, |
---|
4309 | "<p style=\"color: green\">Saved: %s=%s</p>", |
---|
4310 | option_name, option_value ? option_value : "NULL"); |
---|
4311 | } |
---|
4312 | } |
---|
4313 | |
---|
4314 | /* Print table with all options */ |
---|
4315 | (void) mg_printf(conn, "%s", "<table border=\"1\"" |
---|
4316 | "<tr><th>Option</th><th>Description</th>" |
---|
4317 | "<th colspan=2>Value</th></tr>"); |
---|
4318 | |
---|
4319 | for (option = known_options; option->name != NULL; option++) { |
---|
4320 | option_value = mg_get_option(conn->ctx, option->name); |
---|
4321 | if (option_value == NULL) |
---|
4322 | option_value = ""; |
---|
4323 | (void) mg_printf(conn, |
---|
4324 | "<form method=post><tr><td>%s</td><td>%s</td>" |
---|
4325 | "<input type=hidden name=o value='%s'>" |
---|
4326 | "<td><input type=text name=v value='%s'></td>" |
---|
4327 | "<td><input type=submit value=save></td></form></tr>", |
---|
4328 | option->name, option->description, |
---|
4329 | option->name, option_value); |
---|
4330 | } |
---|
4331 | |
---|
4332 | (void) mg_printf(conn, "%s", "</table></body></html>"); |
---|
4333 | } |
---|
4334 | |
---|
4335 | static void |
---|
4336 | reset_per_request_attributes(struct mg_connection *conn) |
---|
4337 | { |
---|
4338 | if (conn->request_info.remote_user != NULL) { |
---|
4339 | free((void *) conn->request_info.remote_user); |
---|
4340 | conn->request_info.remote_user = NULL; |
---|
4341 | } |
---|
4342 | if (conn->free_post_data && conn->request_info.post_data != NULL) { |
---|
4343 | free((void *) conn->request_info.post_data); |
---|
4344 | conn->request_info.post_data = NULL; |
---|
4345 | } |
---|
4346 | } |
---|
4347 | |
---|
4348 | static void |
---|
4349 | close_socket_gracefully(struct mg_connection *conn, SOCKET sock) |
---|
4350 | { |
---|
4351 | char buf[BUFSIZ]; |
---|
4352 | int n; |
---|
4353 | |
---|
4354 | /* Send FIN to the client */ |
---|
4355 | (void) shutdown(sock, SHUT_WR); |
---|
4356 | set_non_blocking_mode(conn, sock); |
---|
4357 | |
---|
4358 | /* |
---|
4359 | * Read and discard pending data. If we do not do that and close the |
---|
4360 | * socket, the data in the send buffer may be discarded. This |
---|
4361 | * behaviour is seen on Windows, when client keeps sending data |
---|
4362 | * when server decide to close the connection; then when client |
---|
4363 | * does recv() it gets no data back. |
---|
4364 | */ |
---|
4365 | do { |
---|
4366 | n = pull(NULL, sock, NULL, buf, sizeof(buf)); |
---|
4367 | } while (n > 0); |
---|
4368 | |
---|
4369 | /* Now we know that our FIN is ACK-ed, safe to close */ |
---|
4370 | (void) closesocket(sock); |
---|
4371 | } |
---|
4372 | |
---|
4373 | static void |
---|
4374 | close_connection(struct mg_connection *conn) |
---|
4375 | { |
---|
4376 | reset_per_request_attributes(conn); |
---|
4377 | |
---|
4378 | if (conn->ssl) |
---|
4379 | SSL_free(conn->ssl); |
---|
4380 | |
---|
4381 | if (conn->client.sock != INVALID_SOCKET) |
---|
4382 | close_socket_gracefully(conn, conn->client.sock); |
---|
4383 | } |
---|
4384 | |
---|
4385 | static void |
---|
4386 | reset_connection_attributes(struct mg_connection *conn) |
---|
4387 | { |
---|
4388 | reset_per_request_attributes(conn); |
---|
4389 | conn->free_post_data = FALSE; |
---|
4390 | conn->request_info.status_code = -1; |
---|
4391 | conn->num_bytes_sent = 0; |
---|
4392 | (void) memset(&conn->request_info, 0, sizeof(conn->request_info)); |
---|
4393 | } |
---|
4394 | |
---|
4395 | static void |
---|
4396 | shift_to_next(struct mg_connection *conn, char *buf, int req_len, int *nread) |
---|
4397 | { |
---|
4398 | int64_t cl; |
---|
4399 | int over_len, body_len; |
---|
4400 | |
---|
4401 | cl = get_content_length(conn); |
---|
4402 | over_len = *nread - req_len; |
---|
4403 | assert(over_len >= 0); |
---|
4404 | |
---|
4405 | if (cl == -1) { |
---|
4406 | body_len = 0; |
---|
4407 | } else if (cl < (int64_t) over_len) { |
---|
4408 | body_len = (int) cl; |
---|
4409 | } else { |
---|
4410 | body_len = over_len; |
---|
4411 | } |
---|
4412 | |
---|
4413 | *nread -= req_len + body_len; |
---|
4414 | (void) memmove(buf, buf + req_len + body_len, *nread); |
---|
4415 | } |
---|
4416 | |
---|
4417 | static void |
---|
4418 | process_new_connection(struct mg_connection *conn) |
---|
4419 | { |
---|
4420 | struct mg_request_info *ri = &conn->request_info; |
---|
4421 | char buf[MAX_REQUEST_SIZE]; |
---|
4422 | int request_len, nread; |
---|
4423 | |
---|
4424 | nread = 0; |
---|
4425 | reset_connection_attributes(conn); |
---|
4426 | |
---|
4427 | /* If next request is not pipelined, read it in */ |
---|
4428 | if ((request_len = get_request_len(buf, (size_t) nread)) == 0) |
---|
4429 | request_len = read_request(NULL, conn->client.sock, |
---|
4430 | conn->ssl, buf, sizeof(buf), &nread); |
---|
4431 | assert(nread >= request_len); |
---|
4432 | |
---|
4433 | if (request_len <= 0) |
---|
4434 | return; /* Remote end closed the connection */ |
---|
4435 | |
---|
4436 | /* 0-terminate the request: parse_request uses sscanf */ |
---|
4437 | buf[request_len - 1] = '\0'; |
---|
4438 | |
---|
4439 | if (parse_http_request(buf, ri, &conn->client.rsa)) { |
---|
4440 | if (strcmp(ri->http_version, "1.0") != 0 && |
---|
4441 | strcmp(ri->http_version, "1.1") != 0) { |
---|
4442 | send_error(conn, 505, |
---|
4443 | "HTTP version not supported", |
---|
4444 | "%s", "Weird HTTP version"); |
---|
4445 | log_access(conn); |
---|
4446 | } else { |
---|
4447 | ri->post_data = buf + request_len; |
---|
4448 | ri->post_data_len = nread - request_len; |
---|
4449 | conn->birth_time = time(NULL); |
---|
4450 | analyze_request(conn); |
---|
4451 | log_access(conn); |
---|
4452 | shift_to_next(conn, buf, request_len, &nread); |
---|
4453 | } |
---|
4454 | } else { |
---|
4455 | /* Do not put garbage in the access log */ |
---|
4456 | send_error(conn, 400, "Bad Request", |
---|
4457 | "Can not parse request: [%.*s]", nread, buf); |
---|
4458 | } |
---|
4459 | |
---|
4460 | } |
---|
4461 | |
---|
4462 | /* |
---|
4463 | * Worker threads take accepted socket from the queue |
---|
4464 | */ |
---|
4465 | static bool_t |
---|
4466 | get_socket(struct mg_context *ctx, struct socket *sp) |
---|
4467 | { |
---|
4468 | struct timespec ts; |
---|
4469 | |
---|
4470 | (void) pthread_mutex_lock(&ctx->thr_mutex); |
---|
4471 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: thread %p: going idle", |
---|
4472 | __func__, (void *) pthread_self())); |
---|
4473 | |
---|
4474 | /* If the queue is empty, wait. We're idle at this point. */ |
---|
4475 | ctx->num_idle++; |
---|
4476 | while (ctx->sq_head == ctx->sq_tail) { |
---|
4477 | ts.tv_nsec = 0; |
---|
4478 | ts.tv_sec = time(NULL) + atoi(ctx->options[OPT_IDLE_TIME]) + 1; |
---|
4479 | if (pthread_cond_timedwait(&ctx->empty_cond, |
---|
4480 | &ctx->thr_mutex, &ts) != 0) { |
---|
4481 | /* Timeout! release the mutex and return */ |
---|
4482 | (void) pthread_mutex_unlock(&ctx->thr_mutex); |
---|
4483 | return (FALSE); |
---|
4484 | } |
---|
4485 | } |
---|
4486 | assert(ctx->sq_head > ctx->sq_tail); |
---|
4487 | |
---|
4488 | /* We're going busy now: got a socket to process! */ |
---|
4489 | ctx->num_idle--; |
---|
4490 | |
---|
4491 | /* Copy socket from the queue and increment tail */ |
---|
4492 | *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)]; |
---|
4493 | ctx->sq_tail++; |
---|
4494 | DEBUG_TRACE((DEBUG_MGS_PREFIX |
---|
4495 | "%s: thread %p grabbed socket %d, going busy", |
---|
4496 | __func__, (void *) pthread_self(), sp->sock)); |
---|
4497 | |
---|
4498 | /* Wrap pointers if needed */ |
---|
4499 | while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) { |
---|
4500 | ctx->sq_tail -= ARRAY_SIZE(ctx->queue); |
---|
4501 | ctx->sq_head -= ARRAY_SIZE(ctx->queue); |
---|
4502 | } |
---|
4503 | |
---|
4504 | pthread_cond_signal(&ctx->full_cond); |
---|
4505 | (void) pthread_mutex_unlock(&ctx->thr_mutex); |
---|
4506 | |
---|
4507 | return (TRUE); |
---|
4508 | } |
---|
4509 | |
---|
4510 | static void |
---|
4511 | worker_thread(struct mg_context *ctx) |
---|
4512 | { |
---|
4513 | struct mg_connection conn; |
---|
4514 | |
---|
4515 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: thread %p starting", |
---|
4516 | __func__, (void *) pthread_self())); |
---|
4517 | |
---|
4518 | (void) memset(&conn, 0, sizeof(conn)); |
---|
4519 | |
---|
4520 | while (get_socket(ctx, &conn.client) == TRUE) { |
---|
4521 | conn.birth_time = time(NULL); |
---|
4522 | conn.ctx = ctx; |
---|
4523 | |
---|
4524 | if (conn.client.is_ssl && |
---|
4525 | (conn.ssl = SSL_new(conn.ctx->ssl_ctx)) == NULL) { |
---|
4526 | cry(&conn, "%s: SSL_new: %d", __func__, ERRNO); |
---|
4527 | } else if (conn.client.is_ssl && |
---|
4528 | SSL_set_fd(conn.ssl, conn.client.sock) != 1) { |
---|
4529 | cry(&conn, "%s: SSL_set_fd: %d", __func__, ERRNO); |
---|
4530 | } else if (conn.client.is_ssl && SSL_accept(conn.ssl) != 1) { |
---|
4531 | cry(&conn, "%s: SSL handshake error", __func__); |
---|
4532 | } else { |
---|
4533 | process_new_connection(&conn); |
---|
4534 | } |
---|
4535 | |
---|
4536 | close_connection(&conn); |
---|
4537 | } |
---|
4538 | |
---|
4539 | /* Signal master that we're done with connection and exiting */ |
---|
4540 | pthread_mutex_lock(&ctx->thr_mutex); |
---|
4541 | ctx->num_threads--; |
---|
4542 | ctx->num_idle--; |
---|
4543 | pthread_cond_signal(&ctx->thr_cond); |
---|
4544 | assert(ctx->num_threads >= 0); |
---|
4545 | pthread_mutex_unlock(&ctx->thr_mutex); |
---|
4546 | |
---|
4547 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: thread %p exiting", |
---|
4548 | __func__, (void *) pthread_self())); |
---|
4549 | } |
---|
4550 | |
---|
4551 | /* |
---|
4552 | * Master thread adds accepted socket to a queue |
---|
4553 | */ |
---|
4554 | static void |
---|
4555 | put_socket(struct mg_context *ctx, const struct socket *sp) |
---|
4556 | { |
---|
4557 | (void) pthread_mutex_lock(&ctx->thr_mutex); |
---|
4558 | |
---|
4559 | /* If the queue is full, wait */ |
---|
4560 | while (ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) |
---|
4561 | (void) pthread_cond_wait(&ctx->full_cond, &ctx->thr_mutex); |
---|
4562 | assert(ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)); |
---|
4563 | |
---|
4564 | /* Copy socket to the queue and increment head */ |
---|
4565 | ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp; |
---|
4566 | ctx->sq_head++; |
---|
4567 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: queued socket %d", |
---|
4568 | __func__, sp->sock)); |
---|
4569 | |
---|
4570 | /* If there are no idle threads, start one */ |
---|
4571 | if (ctx->num_idle == 0 && ctx->num_threads < ctx->max_threads) { |
---|
4572 | if (start_thread(ctx, |
---|
4573 | (mg_thread_func_t) worker_thread, ctx) != 0) |
---|
4574 | cry(fc(ctx), "Cannot start thread: %d", ERRNO); |
---|
4575 | else |
---|
4576 | ctx->num_threads++; |
---|
4577 | } |
---|
4578 | |
---|
4579 | pthread_cond_signal(&ctx->empty_cond); |
---|
4580 | (void) pthread_mutex_unlock(&ctx->thr_mutex); |
---|
4581 | } |
---|
4582 | |
---|
4583 | static void |
---|
4584 | accept_new_connection(const struct socket *listener, struct mg_context *ctx) |
---|
4585 | { |
---|
4586 | struct socket accepted; |
---|
4587 | |
---|
4588 | accepted.rsa.len = sizeof(accepted.rsa.u.sin); |
---|
4589 | accepted.lsa = listener->lsa; |
---|
4590 | if ((accepted.sock = accept(listener->sock, |
---|
4591 | &accepted.rsa.u.sa, &accepted.rsa.len)) == INVALID_SOCKET) |
---|
4592 | return; |
---|
4593 | |
---|
4594 | lock_option(ctx, OPT_ACL); |
---|
4595 | if (ctx->options[OPT_ACL] != NULL && |
---|
4596 | !check_acl(ctx, ctx->options[OPT_ACL], &accepted.rsa)) { |
---|
4597 | cry(fc(ctx), "%s: %s is not allowed to connect", |
---|
4598 | __func__, inet_ntoa(accepted.rsa.u.sin.sin_addr)); |
---|
4599 | (void) closesocket(accepted.sock); |
---|
4600 | unlock_option(ctx, OPT_ACL); |
---|
4601 | return; |
---|
4602 | } |
---|
4603 | unlock_option(ctx, OPT_ACL); |
---|
4604 | |
---|
4605 | /* Put accepted socket structure into the queue */ |
---|
4606 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: accepted socket %d", |
---|
4607 | __func__, accepted.sock)); |
---|
4608 | accepted.is_ssl = listener->is_ssl; |
---|
4609 | put_socket(ctx, &accepted); |
---|
4610 | } |
---|
4611 | |
---|
4612 | static void |
---|
4613 | master_thread(struct mg_context *ctx) |
---|
4614 | { |
---|
4615 | fd_set read_set; |
---|
4616 | struct timeval tv; |
---|
4617 | int i, max_fd; |
---|
4618 | |
---|
4619 | while (ctx->stop_flag == 0) { |
---|
4620 | FD_ZERO(&read_set); |
---|
4621 | max_fd = -1; |
---|
4622 | |
---|
4623 | /* Add listening sockets to the read set */ |
---|
4624 | lock_option(ctx, OPT_PORTS); |
---|
4625 | for (i = 0; i < ctx->num_listeners; i++) |
---|
4626 | add_to_set(ctx->listeners[i].sock, &read_set, &max_fd); |
---|
4627 | unlock_option(ctx, OPT_PORTS); |
---|
4628 | |
---|
4629 | tv.tv_sec = 1; |
---|
4630 | tv.tv_usec = 0; |
---|
4631 | |
---|
4632 | if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) { |
---|
4633 | #ifdef _WIN32 |
---|
4634 | /* |
---|
4635 | * On windows, if read_set and write_set are empty, |
---|
4636 | * select() returns "Invalid parameter" error |
---|
4637 | * (at least on my Windows XP Pro). So in this case, |
---|
4638 | * we sleep here. |
---|
4639 | */ |
---|
4640 | sleep(1); |
---|
4641 | #endif /* _WIN32 */ |
---|
4642 | } else { |
---|
4643 | lock_option(ctx, OPT_PORTS); |
---|
4644 | for (i = 0; i < ctx->num_listeners; i++) |
---|
4645 | if (FD_ISSET(ctx->listeners[i].sock, &read_set)) |
---|
4646 | accept_new_connection( |
---|
4647 | ctx->listeners + i, ctx); |
---|
4648 | unlock_option(ctx, OPT_PORTS); |
---|
4649 | } |
---|
4650 | } |
---|
4651 | |
---|
4652 | /* Stop signal received: somebody called mg_stop. Quit. */ |
---|
4653 | mg_fini(ctx); |
---|
4654 | } |
---|
4655 | |
---|
4656 | void |
---|
4657 | mg_stop(struct mg_context *ctx) |
---|
4658 | { |
---|
4659 | ctx->stop_flag = 1; |
---|
4660 | |
---|
4661 | /* Wait until mg_fini() stops */ |
---|
4662 | while (ctx->stop_flag != 2) |
---|
4663 | (void) sleep(1); |
---|
4664 | |
---|
4665 | assert(ctx->num_threads == 0); |
---|
4666 | free(ctx); |
---|
4667 | |
---|
4668 | #if defined(_WIN32) |
---|
4669 | (void) WSACleanup(); |
---|
4670 | #endif /* _WIN32 */ |
---|
4671 | } |
---|
4672 | |
---|
4673 | struct mg_context * |
---|
4674 | mg_start(void) |
---|
4675 | { |
---|
4676 | struct mg_context *ctx; |
---|
4677 | const struct mg_option *option; |
---|
4678 | int i; |
---|
4679 | |
---|
4680 | #if defined(_WIN32) |
---|
4681 | WSADATA data; |
---|
4682 | WSAStartup(MAKEWORD(2,2), &data); |
---|
4683 | #endif /* _WIN32 */ |
---|
4684 | |
---|
4685 | if ((ctx = (struct mg_context *) calloc(1, sizeof(*ctx))) == NULL) { |
---|
4686 | cry(fc(ctx), "cannot allocate mongoose context"); |
---|
4687 | return (NULL); |
---|
4688 | } |
---|
4689 | |
---|
4690 | ctx->error_log = stderr; |
---|
4691 | mg_set_log_callback(ctx, builtin_error_log); |
---|
4692 | |
---|
4693 | /* Initialize options. First pass: set default option values */ |
---|
4694 | for (option = known_options; option->name != NULL; option++) |
---|
4695 | ctx->options[option->index] = option->default_value == NULL ? |
---|
4696 | NULL : mg_strdup(option->default_value); |
---|
4697 | |
---|
4698 | /* Call setter functions */ |
---|
4699 | for (option = known_options; option->name != NULL; option++) |
---|
4700 | if (option->setter != NULL && |
---|
4701 | ctx->options[option->index] != NULL) |
---|
4702 | if (option->setter(ctx, |
---|
4703 | ctx->options[option->index]) == FALSE) { |
---|
4704 | mg_fini(ctx); |
---|
4705 | return (NULL); |
---|
4706 | } |
---|
4707 | |
---|
4708 | DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: root [%s]", |
---|
4709 | __func__, ctx->options[OPT_ROOT])); |
---|
4710 | |
---|
4711 | #if !defined(_WIN32) |
---|
4712 | /* |
---|
4713 | * Ignore SIGPIPE signal, so if browser cancels the request, it |
---|
4714 | * won't kill the whole process. |
---|
4715 | */ |
---|
4716 | (void) signal(SIGPIPE, SIG_IGN); |
---|
4717 | #endif /* _WIN32 */ |
---|
4718 | |
---|
4719 | /* Initialize options mutexes */ |
---|
4720 | for (i = 0; i < NUM_OPTIONS; i++) |
---|
4721 | (void) pthread_mutex_init(&ctx->opt_mutex[i], NULL); |
---|
4722 | |
---|
4723 | (void) pthread_mutex_init(&ctx->thr_mutex, NULL); |
---|
4724 | (void) pthread_mutex_init(&ctx->bind_mutex, NULL); |
---|
4725 | (void) pthread_cond_init(&ctx->thr_cond, NULL); |
---|
4726 | (void) pthread_cond_init(&ctx->empty_cond, NULL); |
---|
4727 | (void) pthread_cond_init(&ctx->full_cond, NULL); |
---|
4728 | |
---|
4729 | /* Start master (listening) thread */ |
---|
4730 | start_thread(ctx, (mg_thread_func_t) master_thread, ctx); |
---|
4731 | |
---|
4732 | return (ctx); |
---|
4733 | } |
---|