1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 |
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23 | #include "curl_setup.h"
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24 |
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25 | /*
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26 | * See comment in curl_memory.h for the explanation of this sanity check.
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27 | */
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28 |
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29 | #ifdef CURLX_NO_MEMORY_CALLBACKS
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30 | #error "libcurl shall not ever be built with CURLX_NO_MEMORY_CALLBACKS defined"
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31 | #endif
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32 |
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33 | #ifdef HAVE_NETINET_IN_H
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34 | #include <netinet/in.h>
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35 | #endif
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36 | #ifdef HAVE_NETDB_H
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37 | #include <netdb.h>
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38 | #endif
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39 | #ifdef HAVE_ARPA_INET_H
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40 | #include <arpa/inet.h>
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41 | #endif
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42 | #ifdef HAVE_NET_IF_H
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43 | #include <net/if.h>
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44 | #endif
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45 | #ifdef HAVE_SYS_IOCTL_H
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46 | #include <sys/ioctl.h>
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47 | #endif
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48 |
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49 | #ifdef HAVE_SYS_PARAM_H
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50 | #include <sys/param.h>
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51 | #endif
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52 |
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53 | #include "urldata.h"
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54 | #include <curl/curl.h>
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55 | #include "transfer.h"
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56 | #include "vtls/vtls.h"
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57 | #include "url.h"
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58 | #include "getinfo.h"
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59 | #include "hostip.h"
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60 | #include "share.h"
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61 | #include "strdup.h"
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62 | #include "progress.h"
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63 | #include "easyif.h"
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64 | #include "select.h"
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65 | #include "sendf.h" /* for failf function prototype */
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66 | #include "connect.h" /* for Curl_getconnectinfo */
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67 | #include "slist.h"
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68 | #include "amigaos.h"
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69 | #include "non-ascii.h"
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70 | #include "warnless.h"
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71 | #include "multiif.h"
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72 | #include "sigpipe.h"
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73 | #include "ssh.h"
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74 | #include "setopt.h"
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75 |
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76 | /* The last 3 #include files should be in this order */
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77 | #include "curl_printf.h"
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78 | #include "curl_memory.h"
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79 | #include "memdebug.h"
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80 |
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81 | void Curl_version_init(void);
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82 |
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83 | /* win32_cleanup() is for win32 socket cleanup functionality, the opposite
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84 | of win32_init() */
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85 | static void win32_cleanup(void)
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86 | {
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87 | #ifdef USE_WINSOCK
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88 | WSACleanup();
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89 | #endif
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90 | #ifdef USE_WINDOWS_SSPI
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91 | Curl_sspi_global_cleanup();
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92 | #endif
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93 | }
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94 |
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95 | /* win32_init() performs win32 socket initialization to properly setup the
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96 | stack to allow networking */
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97 | static CURLcode win32_init(void)
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98 | {
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99 | #ifdef USE_WINSOCK
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100 | WORD wVersionRequested;
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101 | WSADATA wsaData;
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102 | int res;
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103 |
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104 | #if defined(ENABLE_IPV6) && (USE_WINSOCK < 2)
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105 | Error IPV6_requires_winsock2
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106 | #endif
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107 |
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108 | wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);
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109 |
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110 | res = WSAStartup(wVersionRequested, &wsaData);
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111 |
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112 | if(res != 0)
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113 | /* Tell the user that we couldn't find a useable */
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114 | /* winsock.dll. */
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115 | return CURLE_FAILED_INIT;
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116 |
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117 | /* Confirm that the Windows Sockets DLL supports what we need.*/
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118 | /* Note that if the DLL supports versions greater */
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119 | /* than wVersionRequested, it will still return */
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120 | /* wVersionRequested in wVersion. wHighVersion contains the */
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121 | /* highest supported version. */
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122 |
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123 | if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
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124 | HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested) ) {
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125 | /* Tell the user that we couldn't find a useable */
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126 |
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127 | /* winsock.dll. */
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128 | WSACleanup();
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129 | return CURLE_FAILED_INIT;
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130 | }
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131 | /* The Windows Sockets DLL is acceptable. Proceed. */
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132 | #elif defined(USE_LWIPSOCK)
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133 | lwip_init();
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134 | #endif
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135 |
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136 | #ifdef USE_WINDOWS_SSPI
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137 | {
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138 | CURLcode result = Curl_sspi_global_init();
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139 | if(result)
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140 | return result;
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141 | }
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142 | #endif
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143 |
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144 | return CURLE_OK;
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145 | }
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146 |
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147 | /* true globals -- for curl_global_init() and curl_global_cleanup() */
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148 | static unsigned int initialized;
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149 | static long init_flags;
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150 |
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151 | /*
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152 | * strdup (and other memory functions) is redefined in complicated
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153 | * ways, but at this point it must be defined as the system-supplied strdup
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154 | * so the callback pointer is initialized correctly.
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155 | */
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156 | #if defined(_WIN32_WCE)
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157 | #define system_strdup _strdup
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158 | #elif !defined(HAVE_STRDUP)
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159 | #define system_strdup curlx_strdup
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160 | #else
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161 | #define system_strdup strdup
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162 | #endif
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163 |
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164 | #if defined(_MSC_VER) && defined(_DLL) && !defined(__POCC__)
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165 | # pragma warning(disable:4232) /* MSVC extension, dllimport identity */
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166 | #endif
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167 |
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168 | #ifndef __SYMBIAN32__
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169 | /*
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170 | * If a memory-using function (like curl_getenv) is used before
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171 | * curl_global_init() is called, we need to have these pointers set already.
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172 | */
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173 | curl_malloc_callback Curl_cmalloc = (curl_malloc_callback)malloc;
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174 | curl_free_callback Curl_cfree = (curl_free_callback)free;
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175 | curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
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176 | curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)system_strdup;
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177 | curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;
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178 | #if defined(WIN32) && defined(UNICODE)
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179 | curl_wcsdup_callback Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
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180 | #endif
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181 | #else
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182 | /*
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183 | * Symbian OS doesn't support initialization to code in writable static data.
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184 | * Initialization will occur in the curl_global_init() call.
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185 | */
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186 | curl_malloc_callback Curl_cmalloc;
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187 | curl_free_callback Curl_cfree;
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188 | curl_realloc_callback Curl_crealloc;
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189 | curl_strdup_callback Curl_cstrdup;
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190 | curl_calloc_callback Curl_ccalloc;
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191 | #endif
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192 |
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193 | #if defined(_MSC_VER) && defined(_DLL) && !defined(__POCC__)
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194 | # pragma warning(default:4232) /* MSVC extension, dllimport identity */
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195 | #endif
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196 |
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197 | /**
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198 | * curl_global_init() globally initializes curl given a bitwise set of the
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199 | * different features of what to initialize.
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200 | */
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201 | static CURLcode global_init(long flags, bool memoryfuncs)
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202 | {
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203 | if(initialized++)
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204 | return CURLE_OK;
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205 |
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206 | if(memoryfuncs) {
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207 | /* Setup the default memory functions here (again) */
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208 | Curl_cmalloc = (curl_malloc_callback)malloc;
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209 | Curl_cfree = (curl_free_callback)free;
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210 | Curl_crealloc = (curl_realloc_callback)realloc;
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211 | Curl_cstrdup = (curl_strdup_callback)system_strdup;
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212 | Curl_ccalloc = (curl_calloc_callback)calloc;
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213 | #if defined(WIN32) && defined(UNICODE)
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214 | Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
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215 | #endif
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216 | }
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217 |
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218 | if(!Curl_ssl_init()) {
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219 | DEBUGF(fprintf(stderr, "Error: Curl_ssl_init failed\n"));
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220 | return CURLE_FAILED_INIT;
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221 | }
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222 |
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223 | if(flags & CURL_GLOBAL_WIN32)
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224 | if(win32_init()) {
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225 | DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
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226 | return CURLE_FAILED_INIT;
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227 | }
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228 |
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229 | #ifdef __AMIGA__
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230 | if(!Curl_amiga_init()) {
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231 | DEBUGF(fprintf(stderr, "Error: Curl_amiga_init failed\n"));
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232 | return CURLE_FAILED_INIT;
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233 | }
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234 | #endif
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235 |
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236 | #ifdef NETWARE
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237 | if(netware_init()) {
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238 | DEBUGF(fprintf(stderr, "Warning: LONG namespace not available\n"));
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239 | }
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240 | #endif
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241 |
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242 | if(Curl_resolver_global_init()) {
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243 | DEBUGF(fprintf(stderr, "Error: resolver_global_init failed\n"));
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244 | return CURLE_FAILED_INIT;
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245 | }
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246 |
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247 | (void)Curl_ipv6works();
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248 |
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249 | #if defined(USE_LIBSSH2) && defined(HAVE_LIBSSH2_INIT)
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250 | if(libssh2_init(0)) {
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251 | DEBUGF(fprintf(stderr, "Error: libssh2_init failed\n"));
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252 | return CURLE_FAILED_INIT;
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253 | }
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254 | #endif
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255 |
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256 | if(flags & CURL_GLOBAL_ACK_EINTR)
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257 | Curl_ack_eintr = 1;
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258 |
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259 | init_flags = flags;
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260 |
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261 | Curl_version_init();
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262 |
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263 | return CURLE_OK;
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264 | }
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265 |
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266 |
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267 | /**
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268 | * curl_global_init() globally initializes curl given a bitwise set of the
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269 | * different features of what to initialize.
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270 | */
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271 | CURLcode curl_global_init(long flags)
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272 | {
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273 | return global_init(flags, TRUE);
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274 | }
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275 |
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276 | /*
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277 | * curl_global_init_mem() globally initializes curl and also registers the
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278 | * user provided callback routines.
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279 | */
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280 | CURLcode curl_global_init_mem(long flags, curl_malloc_callback m,
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281 | curl_free_callback f, curl_realloc_callback r,
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282 | curl_strdup_callback s, curl_calloc_callback c)
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283 | {
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284 | /* Invalid input, return immediately */
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285 | if(!m || !f || !r || !s || !c)
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286 | return CURLE_FAILED_INIT;
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287 |
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288 | if(initialized) {
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289 | /* Already initialized, don't do it again, but bump the variable anyway to
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290 | work like curl_global_init() and require the same amount of cleanup
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291 | calls. */
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292 | initialized++;
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293 | return CURLE_OK;
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294 | }
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295 |
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296 | /* set memory functions before global_init() in case it wants memory
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297 | functions */
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298 | Curl_cmalloc = m;
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299 | Curl_cfree = f;
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300 | Curl_cstrdup = s;
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301 | Curl_crealloc = r;
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302 | Curl_ccalloc = c;
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303 |
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304 | /* Call the actual init function, but without setting */
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305 | return global_init(flags, FALSE);
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306 | }
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307 |
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308 | /**
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309 | * curl_global_cleanup() globally cleanups curl, uses the value of
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310 | * "init_flags" to determine what needs to be cleaned up and what doesn't.
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311 | */
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312 | void curl_global_cleanup(void)
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313 | {
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314 | if(!initialized)
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315 | return;
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316 |
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317 | if(--initialized)
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318 | return;
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319 |
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320 | Curl_global_host_cache_dtor();
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321 | Curl_ssl_cleanup();
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322 | Curl_resolver_global_cleanup();
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323 |
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324 | if(init_flags & CURL_GLOBAL_WIN32)
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325 | win32_cleanup();
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326 |
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327 | Curl_amiga_cleanup();
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328 |
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329 | #if defined(USE_LIBSSH2) && defined(HAVE_LIBSSH2_EXIT)
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330 | (void)libssh2_exit();
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331 | #endif
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332 |
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333 | init_flags = 0;
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334 | }
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335 |
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336 | /*
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337 | * curl_easy_init() is the external interface to alloc, setup and init an
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338 | * easy handle that is returned. If anything goes wrong, NULL is returned.
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339 | */
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340 | struct Curl_easy *curl_easy_init(void)
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341 | {
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342 | CURLcode result;
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343 | struct Curl_easy *data;
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344 |
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345 | /* Make sure we inited the global SSL stuff */
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346 | if(!initialized) {
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347 | result = curl_global_init(CURL_GLOBAL_DEFAULT);
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348 | if(result) {
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349 | /* something in the global init failed, return nothing */
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350 | DEBUGF(fprintf(stderr, "Error: curl_global_init failed\n"));
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351 | return NULL;
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352 | }
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353 | }
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354 |
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355 | /* We use curl_open() with undefined URL so far */
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356 | result = Curl_open(&data);
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357 | if(result) {
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358 | DEBUGF(fprintf(stderr, "Error: Curl_open failed\n"));
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359 | return NULL;
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360 | }
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361 |
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362 | return data;
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363 | }
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364 |
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365 | #ifdef CURLDEBUG
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366 |
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367 | struct socketmonitor {
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368 | struct socketmonitor *next; /* the next node in the list or NULL */
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369 | struct pollfd socket; /* socket info of what to monitor */
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370 | };
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371 |
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372 | struct events {
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373 | long ms; /* timeout, run the timeout function when reached */
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374 | bool msbump; /* set TRUE when timeout is set by callback */
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375 | int num_sockets; /* number of nodes in the monitor list */
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376 | struct socketmonitor *list; /* list of sockets to monitor */
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377 | int running_handles; /* store the returned number */
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378 | };
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379 |
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380 | /* events_timer
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381 | *
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382 | * Callback that gets called with a new value when the timeout should be
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383 | * updated.
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384 | */
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385 |
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386 | static int events_timer(struct Curl_multi *multi, /* multi handle */
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387 | long timeout_ms, /* see above */
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388 | void *userp) /* private callback pointer */
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389 | {
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390 | struct events *ev = userp;
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391 | (void)multi;
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392 | if(timeout_ms == -1)
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393 | /* timeout removed */
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394 | timeout_ms = 0;
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395 | else if(timeout_ms == 0)
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396 | /* timeout is already reached! */
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397 | timeout_ms = 1; /* trigger asap */
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398 |
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399 | ev->ms = timeout_ms;
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400 | ev->msbump = TRUE;
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401 | return 0;
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402 | }
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403 |
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404 |
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405 | /* poll2cselect
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406 | *
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407 | * convert from poll() bit definitions to libcurl's CURL_CSELECT_* ones
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408 | */
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409 | static int poll2cselect(int pollmask)
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410 | {
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411 | int omask = 0;
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412 | if(pollmask & POLLIN)
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413 | omask |= CURL_CSELECT_IN;
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414 | if(pollmask & POLLOUT)
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415 | omask |= CURL_CSELECT_OUT;
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416 | if(pollmask & POLLERR)
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417 | omask |= CURL_CSELECT_ERR;
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418 | return omask;
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419 | }
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420 |
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421 |
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422 | /* socketcb2poll
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423 | *
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424 | * convert from libcurl' CURL_POLL_* bit definitions to poll()'s
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425 | */
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426 | static short socketcb2poll(int pollmask)
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427 | {
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428 | short omask = 0;
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429 | if(pollmask & CURL_POLL_IN)
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430 | omask |= POLLIN;
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431 | if(pollmask & CURL_POLL_OUT)
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432 | omask |= POLLOUT;
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433 | return omask;
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434 | }
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435 |
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436 | /* events_socket
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437 | *
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438 | * Callback that gets called with information about socket activity to
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439 | * monitor.
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440 | */
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441 | static int events_socket(struct Curl_easy *easy, /* easy handle */
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442 | curl_socket_t s, /* socket */
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443 | int what, /* see above */
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444 | void *userp, /* private callback
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445 | pointer */
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446 | void *socketp) /* private socket
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447 | pointer */
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448 | {
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449 | struct events *ev = userp;
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450 | struct socketmonitor *m;
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451 | struct socketmonitor *prev = NULL;
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452 |
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453 | #if defined(CURL_DISABLE_VERBOSE_STRINGS)
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454 | (void) easy;
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455 | #endif
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456 | (void)socketp;
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457 |
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458 | m = ev->list;
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459 | while(m) {
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460 | if(m->socket.fd == s) {
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461 |
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462 | if(what == CURL_POLL_REMOVE) {
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463 | struct socketmonitor *nxt = m->next;
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464 | /* remove this node from the list of monitored sockets */
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465 | if(prev)
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466 | prev->next = nxt;
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467 | else
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468 | ev->list = nxt;
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469 | free(m);
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470 | m = nxt;
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471 | infof(easy, "socket cb: socket %d REMOVED\n", s);
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472 | }
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473 | else {
|
---|
474 | /* The socket 's' is already being monitored, update the activity
|
---|
475 | mask. Convert from libcurl bitmask to the poll one. */
|
---|
476 | m->socket.events = socketcb2poll(what);
|
---|
477 | infof(easy, "socket cb: socket %d UPDATED as %s%s\n", s,
|
---|
478 | what&CURL_POLL_IN?"IN":"",
|
---|
479 | what&CURL_POLL_OUT?"OUT":"");
|
---|
480 | }
|
---|
481 | break;
|
---|
482 | }
|
---|
483 | prev = m;
|
---|
484 | m = m->next; /* move to next node */
|
---|
485 | }
|
---|
486 | if(!m) {
|
---|
487 | if(what == CURL_POLL_REMOVE) {
|
---|
488 | /* this happens a bit too often, libcurl fix perhaps? */
|
---|
489 | /* fprintf(stderr,
|
---|
490 | "%s: socket %d asked to be REMOVED but not present!\n",
|
---|
491 | __func__, s); */
|
---|
492 | }
|
---|
493 | else {
|
---|
494 | m = malloc(sizeof(struct socketmonitor));
|
---|
495 | if(m) {
|
---|
496 | m->next = ev->list;
|
---|
497 | m->socket.fd = s;
|
---|
498 | m->socket.events = socketcb2poll(what);
|
---|
499 | m->socket.revents = 0;
|
---|
500 | ev->list = m;
|
---|
501 | infof(easy, "socket cb: socket %d ADDED as %s%s\n", s,
|
---|
502 | what&CURL_POLL_IN?"IN":"",
|
---|
503 | what&CURL_POLL_OUT?"OUT":"");
|
---|
504 | }
|
---|
505 | else
|
---|
506 | return CURLE_OUT_OF_MEMORY;
|
---|
507 | }
|
---|
508 | }
|
---|
509 |
|
---|
510 | return 0;
|
---|
511 | }
|
---|
512 |
|
---|
513 |
|
---|
514 | /*
|
---|
515 | * events_setup()
|
---|
516 | *
|
---|
517 | * Do the multi handle setups that only event-based transfers need.
|
---|
518 | */
|
---|
519 | static void events_setup(struct Curl_multi *multi, struct events *ev)
|
---|
520 | {
|
---|
521 | /* timer callback */
|
---|
522 | curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, events_timer);
|
---|
523 | curl_multi_setopt(multi, CURLMOPT_TIMERDATA, ev);
|
---|
524 |
|
---|
525 | /* socket callback */
|
---|
526 | curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, events_socket);
|
---|
527 | curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, ev);
|
---|
528 | }
|
---|
529 |
|
---|
530 |
|
---|
531 | /* wait_or_timeout()
|
---|
532 | *
|
---|
533 | * waits for activity on any of the given sockets, or the timeout to trigger.
|
---|
534 | */
|
---|
535 |
|
---|
536 | static CURLcode wait_or_timeout(struct Curl_multi *multi, struct events *ev)
|
---|
537 | {
|
---|
538 | bool done = FALSE;
|
---|
539 | CURLMcode mcode = CURLM_OK;
|
---|
540 | CURLcode result = CURLE_OK;
|
---|
541 |
|
---|
542 | while(!done) {
|
---|
543 | CURLMsg *msg;
|
---|
544 | struct socketmonitor *m;
|
---|
545 | struct pollfd *f;
|
---|
546 | struct pollfd fds[4];
|
---|
547 | int numfds = 0;
|
---|
548 | int pollrc;
|
---|
549 | int i;
|
---|
550 | struct curltime before;
|
---|
551 | struct curltime after;
|
---|
552 |
|
---|
553 | /* populate the fds[] array */
|
---|
554 | for(m = ev->list, f = &fds[0]; m; m = m->next) {
|
---|
555 | f->fd = m->socket.fd;
|
---|
556 | f->events = m->socket.events;
|
---|
557 | f->revents = 0;
|
---|
558 | /* fprintf(stderr, "poll() %d check socket %d\n", numfds, f->fd); */
|
---|
559 | f++;
|
---|
560 | numfds++;
|
---|
561 | }
|
---|
562 |
|
---|
563 | /* get the time stamp to use to figure out how long poll takes */
|
---|
564 | before = Curl_now();
|
---|
565 |
|
---|
566 | /* wait for activity or timeout */
|
---|
567 | pollrc = Curl_poll(fds, numfds, (int)ev->ms);
|
---|
568 |
|
---|
569 | after = Curl_now();
|
---|
570 |
|
---|
571 | ev->msbump = FALSE; /* reset here */
|
---|
572 |
|
---|
573 | if(0 == pollrc) {
|
---|
574 | /* timeout! */
|
---|
575 | ev->ms = 0;
|
---|
576 | /* fprintf(stderr, "call curl_multi_socket_action(TIMEOUT)\n"); */
|
---|
577 | mcode = curl_multi_socket_action(multi, CURL_SOCKET_TIMEOUT, 0,
|
---|
578 | &ev->running_handles);
|
---|
579 | }
|
---|
580 | else if(pollrc > 0) {
|
---|
581 | /* loop over the monitored sockets to see which ones had activity */
|
---|
582 | for(i = 0; i< numfds; i++) {
|
---|
583 | if(fds[i].revents) {
|
---|
584 | /* socket activity, tell libcurl */
|
---|
585 | int act = poll2cselect(fds[i].revents); /* convert */
|
---|
586 | infof(multi->easyp, "call curl_multi_socket_action(socket %d)\n",
|
---|
587 | fds[i].fd);
|
---|
588 | mcode = curl_multi_socket_action(multi, fds[i].fd, act,
|
---|
589 | &ev->running_handles);
|
---|
590 | }
|
---|
591 | }
|
---|
592 |
|
---|
593 | if(!ev->msbump) {
|
---|
594 | /* If nothing updated the timeout, we decrease it by the spent time.
|
---|
595 | * If it was updated, it has the new timeout time stored already.
|
---|
596 | */
|
---|
597 | timediff_t timediff = Curl_timediff(after, before);
|
---|
598 | if(timediff > 0) {
|
---|
599 | if(timediff > ev->ms)
|
---|
600 | ev->ms = 0;
|
---|
601 | else
|
---|
602 | ev->ms -= (long)timediff;
|
---|
603 | }
|
---|
604 | }
|
---|
605 | }
|
---|
606 | else
|
---|
607 | return CURLE_RECV_ERROR;
|
---|
608 |
|
---|
609 | if(mcode)
|
---|
610 | return CURLE_URL_MALFORMAT; /* TODO: return a proper error! */
|
---|
611 |
|
---|
612 | /* we don't really care about the "msgs_in_queue" value returned in the
|
---|
613 | second argument */
|
---|
614 | msg = curl_multi_info_read(multi, &pollrc);
|
---|
615 | if(msg) {
|
---|
616 | result = msg->data.result;
|
---|
617 | done = TRUE;
|
---|
618 | }
|
---|
619 | }
|
---|
620 |
|
---|
621 | return result;
|
---|
622 | }
|
---|
623 |
|
---|
624 |
|
---|
625 | /* easy_events()
|
---|
626 | *
|
---|
627 | * Runs a transfer in a blocking manner using the events-based API
|
---|
628 | */
|
---|
629 | static CURLcode easy_events(struct Curl_multi *multi)
|
---|
630 | {
|
---|
631 | /* this struct is made static to allow it to be used after this function
|
---|
632 | returns and curl_multi_remove_handle() is called */
|
---|
633 | static struct events evs = {2, FALSE, 0, NULL, 0};
|
---|
634 |
|
---|
635 | /* if running event-based, do some further multi inits */
|
---|
636 | events_setup(multi, &evs);
|
---|
637 |
|
---|
638 | return wait_or_timeout(multi, &evs);
|
---|
639 | }
|
---|
640 | #else /* CURLDEBUG */
|
---|
641 | /* when not built with debug, this function doesn't exist */
|
---|
642 | #define easy_events(x) CURLE_NOT_BUILT_IN
|
---|
643 | #endif
|
---|
644 |
|
---|
645 | static CURLcode easy_transfer(struct Curl_multi *multi)
|
---|
646 | {
|
---|
647 | bool done = FALSE;
|
---|
648 | CURLMcode mcode = CURLM_OK;
|
---|
649 | CURLcode result = CURLE_OK;
|
---|
650 | struct curltime before;
|
---|
651 | int without_fds = 0; /* count number of consecutive returns from
|
---|
652 | curl_multi_wait() without any filedescriptors */
|
---|
653 |
|
---|
654 | while(!done && !mcode) {
|
---|
655 | int still_running = 0;
|
---|
656 | int rc;
|
---|
657 |
|
---|
658 | before = Curl_now();
|
---|
659 | mcode = curl_multi_wait(multi, NULL, 0, 1000, &rc);
|
---|
660 |
|
---|
661 | if(!mcode) {
|
---|
662 | if(!rc) {
|
---|
663 | struct curltime after = Curl_now();
|
---|
664 |
|
---|
665 | /* If it returns without any filedescriptor instantly, we need to
|
---|
666 | avoid busy-looping during periods where it has nothing particular
|
---|
667 | to wait for */
|
---|
668 | if(Curl_timediff(after, before) <= 10) {
|
---|
669 | without_fds++;
|
---|
670 | if(without_fds > 2) {
|
---|
671 | int sleep_ms = without_fds < 10 ? (1 << (without_fds - 1)) : 1000;
|
---|
672 | Curl_wait_ms(sleep_ms);
|
---|
673 | }
|
---|
674 | }
|
---|
675 | else
|
---|
676 | /* it wasn't "instant", restart counter */
|
---|
677 | without_fds = 0;
|
---|
678 | }
|
---|
679 | else
|
---|
680 | /* got file descriptor, restart counter */
|
---|
681 | without_fds = 0;
|
---|
682 |
|
---|
683 | mcode = curl_multi_perform(multi, &still_running);
|
---|
684 | }
|
---|
685 |
|
---|
686 | /* only read 'still_running' if curl_multi_perform() return OK */
|
---|
687 | if(!mcode && !still_running) {
|
---|
688 | CURLMsg *msg = curl_multi_info_read(multi, &rc);
|
---|
689 | if(msg) {
|
---|
690 | result = msg->data.result;
|
---|
691 | done = TRUE;
|
---|
692 | }
|
---|
693 | }
|
---|
694 | }
|
---|
695 |
|
---|
696 | /* Make sure to return some kind of error if there was a multi problem */
|
---|
697 | if(mcode) {
|
---|
698 | result = (mcode == CURLM_OUT_OF_MEMORY) ? CURLE_OUT_OF_MEMORY :
|
---|
699 | /* The other multi errors should never happen, so return
|
---|
700 | something suitably generic */
|
---|
701 | CURLE_BAD_FUNCTION_ARGUMENT;
|
---|
702 | }
|
---|
703 |
|
---|
704 | return result;
|
---|
705 | }
|
---|
706 |
|
---|
707 |
|
---|
708 | /*
|
---|
709 | * easy_perform() is the external interface that performs a blocking
|
---|
710 | * transfer as previously setup.
|
---|
711 | *
|
---|
712 | * CONCEPT: This function creates a multi handle, adds the easy handle to it,
|
---|
713 | * runs curl_multi_perform() until the transfer is done, then detaches the
|
---|
714 | * easy handle, destroys the multi handle and returns the easy handle's return
|
---|
715 | * code.
|
---|
716 | *
|
---|
717 | * REALITY: it can't just create and destroy the multi handle that easily. It
|
---|
718 | * needs to keep it around since if this easy handle is used again by this
|
---|
719 | * function, the same multi handle must be re-used so that the same pools and
|
---|
720 | * caches can be used.
|
---|
721 | *
|
---|
722 | * DEBUG: if 'events' is set TRUE, this function will use a replacement engine
|
---|
723 | * instead of curl_multi_perform() and use curl_multi_socket_action().
|
---|
724 | */
|
---|
725 | static CURLcode easy_perform(struct Curl_easy *data, bool events)
|
---|
726 | {
|
---|
727 | struct Curl_multi *multi;
|
---|
728 | CURLMcode mcode;
|
---|
729 | CURLcode result = CURLE_OK;
|
---|
730 | SIGPIPE_VARIABLE(pipe_st);
|
---|
731 |
|
---|
732 | if(!data)
|
---|
733 | return CURLE_BAD_FUNCTION_ARGUMENT;
|
---|
734 |
|
---|
735 | if(data->multi) {
|
---|
736 | failf(data, "easy handle already used in multi handle");
|
---|
737 | return CURLE_FAILED_INIT;
|
---|
738 | }
|
---|
739 |
|
---|
740 | if(data->multi_easy)
|
---|
741 | multi = data->multi_easy;
|
---|
742 | else {
|
---|
743 | /* this multi handle will only ever have a single easy handled attached
|
---|
744 | to it, so make it use minimal hashes */
|
---|
745 | multi = Curl_multi_handle(1, 3);
|
---|
746 | if(!multi)
|
---|
747 | return CURLE_OUT_OF_MEMORY;
|
---|
748 | data->multi_easy = multi;
|
---|
749 | }
|
---|
750 |
|
---|
751 | /* Copy the MAXCONNECTS option to the multi handle */
|
---|
752 | curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, data->set.maxconnects);
|
---|
753 |
|
---|
754 | mcode = curl_multi_add_handle(multi, data);
|
---|
755 | if(mcode) {
|
---|
756 | curl_multi_cleanup(multi);
|
---|
757 | if(mcode == CURLM_OUT_OF_MEMORY)
|
---|
758 | return CURLE_OUT_OF_MEMORY;
|
---|
759 | return CURLE_FAILED_INIT;
|
---|
760 | }
|
---|
761 |
|
---|
762 | sigpipe_ignore(data, &pipe_st);
|
---|
763 |
|
---|
764 | /* assign this after curl_multi_add_handle() since that function checks for
|
---|
765 | it and rejects this handle otherwise */
|
---|
766 | data->multi = multi;
|
---|
767 |
|
---|
768 | /* run the transfer */
|
---|
769 | result = events ? easy_events(multi) : easy_transfer(multi);
|
---|
770 |
|
---|
771 | /* ignoring the return code isn't nice, but atm we can't really handle
|
---|
772 | a failure here, room for future improvement! */
|
---|
773 | (void)curl_multi_remove_handle(multi, data);
|
---|
774 |
|
---|
775 | sigpipe_restore(&pipe_st);
|
---|
776 |
|
---|
777 | /* The multi handle is kept alive, owned by the easy handle */
|
---|
778 | return result;
|
---|
779 | }
|
---|
780 |
|
---|
781 |
|
---|
782 | /*
|
---|
783 | * curl_easy_perform() is the external interface that performs a blocking
|
---|
784 | * transfer as previously setup.
|
---|
785 | */
|
---|
786 | CURLcode curl_easy_perform(struct Curl_easy *data)
|
---|
787 | {
|
---|
788 | return easy_perform(data, FALSE);
|
---|
789 | }
|
---|
790 |
|
---|
791 | #ifdef CURLDEBUG
|
---|
792 | /*
|
---|
793 | * curl_easy_perform_ev() is the external interface that performs a blocking
|
---|
794 | * transfer using the event-based API internally.
|
---|
795 | */
|
---|
796 | CURLcode curl_easy_perform_ev(struct Curl_easy *data)
|
---|
797 | {
|
---|
798 | return easy_perform(data, TRUE);
|
---|
799 | }
|
---|
800 |
|
---|
801 | #endif
|
---|
802 |
|
---|
803 | /*
|
---|
804 | * curl_easy_cleanup() is the external interface to cleaning/freeing the given
|
---|
805 | * easy handle.
|
---|
806 | */
|
---|
807 | void curl_easy_cleanup(struct Curl_easy *data)
|
---|
808 | {
|
---|
809 | SIGPIPE_VARIABLE(pipe_st);
|
---|
810 |
|
---|
811 | if(!data)
|
---|
812 | return;
|
---|
813 |
|
---|
814 | sigpipe_ignore(data, &pipe_st);
|
---|
815 | Curl_close(data);
|
---|
816 | sigpipe_restore(&pipe_st);
|
---|
817 | }
|
---|
818 |
|
---|
819 | /*
|
---|
820 | * curl_easy_getinfo() is an external interface that allows an app to retrieve
|
---|
821 | * information from a performed transfer and similar.
|
---|
822 | */
|
---|
823 | #undef curl_easy_getinfo
|
---|
824 | CURLcode curl_easy_getinfo(struct Curl_easy *data, CURLINFO info, ...)
|
---|
825 | {
|
---|
826 | va_list arg;
|
---|
827 | void *paramp;
|
---|
828 | CURLcode result;
|
---|
829 |
|
---|
830 | va_start(arg, info);
|
---|
831 | paramp = va_arg(arg, void *);
|
---|
832 |
|
---|
833 | result = Curl_getinfo(data, info, paramp);
|
---|
834 |
|
---|
835 | va_end(arg);
|
---|
836 | return result;
|
---|
837 | }
|
---|
838 |
|
---|
839 | static CURLcode dupset(struct Curl_easy *dst, struct Curl_easy *src)
|
---|
840 | {
|
---|
841 | CURLcode result = CURLE_OK;
|
---|
842 | enum dupstring i;
|
---|
843 |
|
---|
844 | /* Copy src->set into dst->set first, then deal with the strings
|
---|
845 | afterwards */
|
---|
846 | dst->set = src->set;
|
---|
847 |
|
---|
848 | /* clear all string pointers first */
|
---|
849 | memset(dst->set.str, 0, STRING_LAST * sizeof(char *));
|
---|
850 |
|
---|
851 | /* duplicate all strings */
|
---|
852 | for(i = (enum dupstring)0; i< STRING_LASTZEROTERMINATED; i++) {
|
---|
853 | result = Curl_setstropt(&dst->set.str[i], src->set.str[i]);
|
---|
854 | if(result)
|
---|
855 | return result;
|
---|
856 | }
|
---|
857 |
|
---|
858 | /* duplicate memory areas pointed to */
|
---|
859 | i = STRING_COPYPOSTFIELDS;
|
---|
860 | if(src->set.postfieldsize && src->set.str[i]) {
|
---|
861 | /* postfieldsize is curl_off_t, Curl_memdup() takes a size_t ... */
|
---|
862 | dst->set.str[i] = Curl_memdup(src->set.str[i],
|
---|
863 | curlx_sotouz(src->set.postfieldsize));
|
---|
864 | if(!dst->set.str[i])
|
---|
865 | return CURLE_OUT_OF_MEMORY;
|
---|
866 | /* point to the new copy */
|
---|
867 | dst->set.postfields = dst->set.str[i];
|
---|
868 | }
|
---|
869 |
|
---|
870 | return CURLE_OK;
|
---|
871 | }
|
---|
872 |
|
---|
873 | /*
|
---|
874 | * curl_easy_duphandle() is an external interface to allow duplication of a
|
---|
875 | * given input easy handle. The returned handle will be a new working handle
|
---|
876 | * with all options set exactly as the input source handle.
|
---|
877 | */
|
---|
878 | struct Curl_easy *curl_easy_duphandle(struct Curl_easy *data)
|
---|
879 | {
|
---|
880 | struct Curl_easy *outcurl = calloc(1, sizeof(struct Curl_easy));
|
---|
881 | if(NULL == outcurl)
|
---|
882 | goto fail;
|
---|
883 |
|
---|
884 | /*
|
---|
885 | * We setup a few buffers we need. We should probably make them
|
---|
886 | * get setup on-demand in the code, as that would probably decrease
|
---|
887 | * the likeliness of us forgetting to init a buffer here in the future.
|
---|
888 | */
|
---|
889 | outcurl->set.buffer_size = data->set.buffer_size;
|
---|
890 | outcurl->state.buffer = malloc(outcurl->set.buffer_size + 1);
|
---|
891 | if(!outcurl->state.buffer)
|
---|
892 | goto fail;
|
---|
893 |
|
---|
894 | outcurl->state.headerbuff = malloc(HEADERSIZE);
|
---|
895 | if(!outcurl->state.headerbuff)
|
---|
896 | goto fail;
|
---|
897 | outcurl->state.headersize = HEADERSIZE;
|
---|
898 |
|
---|
899 | /* copy all userdefined values */
|
---|
900 | if(dupset(outcurl, data))
|
---|
901 | goto fail;
|
---|
902 |
|
---|
903 | /* the connection cache is setup on demand */
|
---|
904 | outcurl->state.conn_cache = NULL;
|
---|
905 |
|
---|
906 | outcurl->state.lastconnect = NULL;
|
---|
907 |
|
---|
908 | outcurl->progress.flags = data->progress.flags;
|
---|
909 | outcurl->progress.callback = data->progress.callback;
|
---|
910 |
|
---|
911 | if(data->cookies) {
|
---|
912 | /* If cookies are enabled in the parent handle, we enable them
|
---|
913 | in the clone as well! */
|
---|
914 | outcurl->cookies = Curl_cookie_init(data,
|
---|
915 | data->cookies->filename,
|
---|
916 | outcurl->cookies,
|
---|
917 | data->set.cookiesession);
|
---|
918 | if(!outcurl->cookies)
|
---|
919 | goto fail;
|
---|
920 | }
|
---|
921 |
|
---|
922 | /* duplicate all values in 'change' */
|
---|
923 | if(data->change.cookielist) {
|
---|
924 | outcurl->change.cookielist =
|
---|
925 | Curl_slist_duplicate(data->change.cookielist);
|
---|
926 | if(!outcurl->change.cookielist)
|
---|
927 | goto fail;
|
---|
928 | }
|
---|
929 |
|
---|
930 | if(data->change.url) {
|
---|
931 | outcurl->change.url = strdup(data->change.url);
|
---|
932 | if(!outcurl->change.url)
|
---|
933 | goto fail;
|
---|
934 | outcurl->change.url_alloc = TRUE;
|
---|
935 | }
|
---|
936 |
|
---|
937 | if(data->change.referer) {
|
---|
938 | outcurl->change.referer = strdup(data->change.referer);
|
---|
939 | if(!outcurl->change.referer)
|
---|
940 | goto fail;
|
---|
941 | outcurl->change.referer_alloc = TRUE;
|
---|
942 | }
|
---|
943 |
|
---|
944 | /* Clone the resolver handle, if present, for the new handle */
|
---|
945 | if(Curl_resolver_duphandle(&outcurl->state.resolver,
|
---|
946 | data->state.resolver))
|
---|
947 | goto fail;
|
---|
948 |
|
---|
949 | Curl_convert_setup(outcurl);
|
---|
950 |
|
---|
951 | Curl_initinfo(outcurl);
|
---|
952 |
|
---|
953 | outcurl->magic = CURLEASY_MAGIC_NUMBER;
|
---|
954 |
|
---|
955 | /* we reach this point and thus we are OK */
|
---|
956 |
|
---|
957 | return outcurl;
|
---|
958 |
|
---|
959 | fail:
|
---|
960 |
|
---|
961 | if(outcurl) {
|
---|
962 | curl_slist_free_all(outcurl->change.cookielist);
|
---|
963 | outcurl->change.cookielist = NULL;
|
---|
964 | Curl_safefree(outcurl->state.buffer);
|
---|
965 | Curl_safefree(outcurl->state.headerbuff);
|
---|
966 | Curl_safefree(outcurl->change.url);
|
---|
967 | Curl_safefree(outcurl->change.referer);
|
---|
968 | Curl_freeset(outcurl);
|
---|
969 | free(outcurl);
|
---|
970 | }
|
---|
971 |
|
---|
972 | return NULL;
|
---|
973 | }
|
---|
974 |
|
---|
975 | /*
|
---|
976 | * curl_easy_reset() is an external interface that allows an app to re-
|
---|
977 | * initialize a session handle to the default values.
|
---|
978 | */
|
---|
979 | void curl_easy_reset(struct Curl_easy *data)
|
---|
980 | {
|
---|
981 | Curl_safefree(data->state.pathbuffer);
|
---|
982 |
|
---|
983 | data->state.path = NULL;
|
---|
984 |
|
---|
985 | Curl_free_request_state(data);
|
---|
986 |
|
---|
987 | /* zero out UserDefined data: */
|
---|
988 | Curl_freeset(data);
|
---|
989 | memset(&data->set, 0, sizeof(struct UserDefined));
|
---|
990 | (void)Curl_init_userdefined(&data->set);
|
---|
991 |
|
---|
992 | /* zero out Progress data: */
|
---|
993 | memset(&data->progress, 0, sizeof(struct Progress));
|
---|
994 |
|
---|
995 | /* zero out PureInfo data: */
|
---|
996 | Curl_initinfo(data);
|
---|
997 |
|
---|
998 | data->progress.flags |= PGRS_HIDE;
|
---|
999 | data->state.current_speed = -1; /* init to negative == impossible */
|
---|
1000 |
|
---|
1001 | /* zero out authentication data: */
|
---|
1002 | memset(&data->state.authhost, 0, sizeof(struct auth));
|
---|
1003 | memset(&data->state.authproxy, 0, sizeof(struct auth));
|
---|
1004 | }
|
---|
1005 |
|
---|
1006 | /*
|
---|
1007 | * curl_easy_pause() allows an application to pause or unpause a specific
|
---|
1008 | * transfer and direction. This function sets the full new state for the
|
---|
1009 | * current connection this easy handle operates on.
|
---|
1010 | *
|
---|
1011 | * NOTE: if you have the receiving paused and you call this function to remove
|
---|
1012 | * the pausing, you may get your write callback called at this point.
|
---|
1013 | *
|
---|
1014 | * Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
|
---|
1015 | */
|
---|
1016 | CURLcode curl_easy_pause(struct Curl_easy *data, int action)
|
---|
1017 | {
|
---|
1018 | struct SingleRequest *k = &data->req;
|
---|
1019 | CURLcode result = CURLE_OK;
|
---|
1020 |
|
---|
1021 | /* first switch off both pause bits */
|
---|
1022 | int newstate = k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
|
---|
1023 |
|
---|
1024 | /* set the new desired pause bits */
|
---|
1025 | newstate |= ((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
|
---|
1026 | ((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
|
---|
1027 |
|
---|
1028 | /* put it back in the keepon */
|
---|
1029 | k->keepon = newstate;
|
---|
1030 |
|
---|
1031 | if(!(newstate & KEEP_RECV_PAUSE) && data->state.tempcount) {
|
---|
1032 | /* there are buffers for sending that can be delivered as the receive
|
---|
1033 | pausing is lifted! */
|
---|
1034 | unsigned int i;
|
---|
1035 | unsigned int count = data->state.tempcount;
|
---|
1036 | struct tempbuf writebuf[3]; /* there can only be three */
|
---|
1037 |
|
---|
1038 | /* copy the structs to allow for immediate re-pausing */
|
---|
1039 | for(i = 0; i < data->state.tempcount; i++) {
|
---|
1040 | writebuf[i] = data->state.tempwrite[i];
|
---|
1041 | data->state.tempwrite[i].buf = NULL;
|
---|
1042 | }
|
---|
1043 | data->state.tempcount = 0;
|
---|
1044 |
|
---|
1045 | for(i = 0; i < count; i++) {
|
---|
1046 | /* even if one function returns error, this loops through and frees all
|
---|
1047 | buffers */
|
---|
1048 | if(!result)
|
---|
1049 | result = Curl_client_chop_write(data->easy_conn,
|
---|
1050 | writebuf[i].type,
|
---|
1051 | writebuf[i].buf,
|
---|
1052 | writebuf[i].len);
|
---|
1053 | free(writebuf[i].buf);
|
---|
1054 | }
|
---|
1055 | if(result)
|
---|
1056 | return result;
|
---|
1057 | }
|
---|
1058 |
|
---|
1059 | /* if there's no error and we're not pausing both directions, we want
|
---|
1060 | to have this handle checked soon */
|
---|
1061 | if(!result &&
|
---|
1062 | ((newstate&(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) !=
|
---|
1063 | (KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) )
|
---|
1064 | Curl_expire(data, 0, EXPIRE_RUN_NOW); /* get this handle going again */
|
---|
1065 |
|
---|
1066 | return result;
|
---|
1067 | }
|
---|
1068 |
|
---|
1069 |
|
---|
1070 | static CURLcode easy_connection(struct Curl_easy *data,
|
---|
1071 | curl_socket_t *sfd,
|
---|
1072 | struct connectdata **connp)
|
---|
1073 | {
|
---|
1074 | if(data == NULL)
|
---|
1075 | return CURLE_BAD_FUNCTION_ARGUMENT;
|
---|
1076 |
|
---|
1077 | /* only allow these to be called on handles with CURLOPT_CONNECT_ONLY */
|
---|
1078 | if(!data->set.connect_only) {
|
---|
1079 | failf(data, "CONNECT_ONLY is required!");
|
---|
1080 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
1081 | }
|
---|
1082 |
|
---|
1083 | *sfd = Curl_getconnectinfo(data, connp);
|
---|
1084 |
|
---|
1085 | if(*sfd == CURL_SOCKET_BAD) {
|
---|
1086 | failf(data, "Failed to get recent socket");
|
---|
1087 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
1088 | }
|
---|
1089 |
|
---|
1090 | return CURLE_OK;
|
---|
1091 | }
|
---|
1092 |
|
---|
1093 | /*
|
---|
1094 | * Receives data from the connected socket. Use after successful
|
---|
1095 | * curl_easy_perform() with CURLOPT_CONNECT_ONLY option.
|
---|
1096 | * Returns CURLE_OK on success, error code on error.
|
---|
1097 | */
|
---|
1098 | CURLcode curl_easy_recv(struct Curl_easy *data, void *buffer, size_t buflen,
|
---|
1099 | size_t *n)
|
---|
1100 | {
|
---|
1101 | curl_socket_t sfd;
|
---|
1102 | CURLcode result;
|
---|
1103 | ssize_t n1;
|
---|
1104 | struct connectdata *c;
|
---|
1105 |
|
---|
1106 | result = easy_connection(data, &sfd, &c);
|
---|
1107 | if(result)
|
---|
1108 | return result;
|
---|
1109 |
|
---|
1110 | *n = 0;
|
---|
1111 | result = Curl_read(c, sfd, buffer, buflen, &n1);
|
---|
1112 |
|
---|
1113 | if(result)
|
---|
1114 | return result;
|
---|
1115 |
|
---|
1116 | *n = (size_t)n1;
|
---|
1117 |
|
---|
1118 | return CURLE_OK;
|
---|
1119 | }
|
---|
1120 |
|
---|
1121 | /*
|
---|
1122 | * Sends data over the connected socket. Use after successful
|
---|
1123 | * curl_easy_perform() with CURLOPT_CONNECT_ONLY option.
|
---|
1124 | */
|
---|
1125 | CURLcode curl_easy_send(struct Curl_easy *data, const void *buffer,
|
---|
1126 | size_t buflen, size_t *n)
|
---|
1127 | {
|
---|
1128 | curl_socket_t sfd;
|
---|
1129 | CURLcode result;
|
---|
1130 | ssize_t n1;
|
---|
1131 | struct connectdata *c = NULL;
|
---|
1132 |
|
---|
1133 | result = easy_connection(data, &sfd, &c);
|
---|
1134 | if(result)
|
---|
1135 | return result;
|
---|
1136 |
|
---|
1137 | *n = 0;
|
---|
1138 | result = Curl_write(c, sfd, buffer, buflen, &n1);
|
---|
1139 |
|
---|
1140 | if(n1 == -1)
|
---|
1141 | return CURLE_SEND_ERROR;
|
---|
1142 |
|
---|
1143 | /* detect EAGAIN */
|
---|
1144 | if(!result && !n1)
|
---|
1145 | return CURLE_AGAIN;
|
---|
1146 |
|
---|
1147 | *n = (size_t)n1;
|
---|
1148 |
|
---|
1149 | return result;
|
---|
1150 | }
|
---|