mirror of
https://github.com/moparisthebest/curl
synced 2024-12-24 17:18:48 -05:00
f26bc29cfe
- Change the behavior of win32_init so that the required initialization procedures are not affected by CURL_GLOBAL_WIN32 flag. libcurl via curl_global_init supports initializing for win32 with an optional flag CURL_GLOBAL_WIN32, which if omitted was meant to stop Winsock initialization. It did so internally by skipping win32_init() when that flag was set. Since then win32_init() has been expanded to include required initialization routines that are separate from Winsock and therefore must be called in all cases. This commit fixes it so that CURL_GLOBAL_WIN32 only controls the optional win32 initialization (which is Winsock initialization, according to our doc). The only users affected by this change are those that don't pass CURL_GLOBAL_WIN32 to curl_global_init. For them this commit removes the risk of a potential crash. Ref: https://github.com/curl/curl/pull/3573 Fixes https://github.com/curl/curl/issues/3313 Closes https://github.com/curl/curl/pull/3575
1244 lines
33 KiB
C
1244 lines
33 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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/*
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* See comment in curl_memory.h for the explanation of this sanity check.
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*/
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#ifdef CURLX_NO_MEMORY_CALLBACKS
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#error "libcurl shall not ever be built with CURLX_NO_MEMORY_CALLBACKS defined"
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_NET_IF_H
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#include <net/if.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#include "urldata.h"
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#include <curl/curl.h>
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#include "transfer.h"
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#include "vtls/vtls.h"
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#include "url.h"
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#include "getinfo.h"
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#include "hostip.h"
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#include "share.h"
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#include "strdup.h"
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#include "progress.h"
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#include "easyif.h"
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#include "multiif.h"
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#include "select.h"
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#include "sendf.h" /* for failf function prototype */
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#include "connect.h" /* for Curl_getconnectinfo */
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#include "slist.h"
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#include "mime.h"
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#include "amigaos.h"
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#include "non-ascii.h"
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#include "warnless.h"
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#include "multiif.h"
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#include "sigpipe.h"
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#include "ssh.h"
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#include "setopt.h"
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#include "http_digest.h"
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#include "system_win32.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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void Curl_version_init(void);
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/* true globals -- for curl_global_init() and curl_global_cleanup() */
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static unsigned int initialized;
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static long init_flags;
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/*
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* win32 init and cleanup functions
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*/
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#ifdef WIN32
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/* win32_cleanup() is the opposite of win32_init() */
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static void win32_cleanup()
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{
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#ifdef USE_WINDOWS_SSPI
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Curl_sspi_global_cleanup();
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#endif
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if(init_flags & CURL_GLOBAL_WIN32) {
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#ifdef USE_WINSOCK
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WSACleanup();
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#endif
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}
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}
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LARGE_INTEGER Curl_freq;
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bool Curl_isVistaOrGreater;
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/* win32_init() performs win32 global initialization */
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static CURLcode win32_init(long flags)
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{
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/* CURL_GLOBAL_WIN32 controls the *optional* part of the initialization which
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is just for Winsock at the moment. Any required win32 initialization
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should take place after this block. */
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if(flags & CURL_GLOBAL_WIN32) {
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#ifdef USE_WINSOCK
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WORD wVersionRequested;
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WSADATA wsaData;
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int res;
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#if defined(ENABLE_IPV6) && (USE_WINSOCK < 2)
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#error IPV6_requires_winsock2
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#endif
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wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);
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res = WSAStartup(wVersionRequested, &wsaData);
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if(res != 0)
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/* Tell the user that we couldn't find a usable */
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/* winsock.dll. */
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return CURLE_FAILED_INIT;
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/* Confirm that the Windows Sockets DLL supports what we need.*/
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/* Note that if the DLL supports versions greater */
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/* than wVersionRequested, it will still return */
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/* wVersionRequested in wVersion. wHighVersion contains the */
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/* highest supported version. */
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if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
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HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested) ) {
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/* Tell the user that we couldn't find a usable */
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/* winsock.dll. */
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WSACleanup();
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return CURLE_FAILED_INIT;
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}
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/* The Windows Sockets DLL is acceptable. Proceed. */
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#elif defined(USE_LWIPSOCK)
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lwip_init();
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#endif
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} /* CURL_GLOBAL_WIN32 */
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#ifdef USE_WINDOWS_SSPI
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{
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CURLcode result = Curl_sspi_global_init();
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if(result)
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return result;
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}
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#endif
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if(Curl_verify_windows_version(6, 0, PLATFORM_WINNT,
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VERSION_GREATER_THAN_EQUAL)) {
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Curl_isVistaOrGreater = TRUE;
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QueryPerformanceFrequency(&Curl_freq);
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}
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else
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Curl_isVistaOrGreater = FALSE;
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return CURLE_OK;
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}
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#endif /* WIN32 */
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/*
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* strdup (and other memory functions) is redefined in complicated
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* ways, but at this point it must be defined as the system-supplied strdup
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* so the callback pointer is initialized correctly.
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*/
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#if defined(_WIN32_WCE)
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#define system_strdup _strdup
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#elif !defined(HAVE_STRDUP)
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#define system_strdup curlx_strdup
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#else
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#define system_strdup strdup
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#endif
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#if defined(_MSC_VER) && defined(_DLL) && !defined(__POCC__)
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# pragma warning(disable:4232) /* MSVC extension, dllimport identity */
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#endif
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#ifndef __SYMBIAN32__
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/*
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* If a memory-using function (like curl_getenv) is used before
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* curl_global_init() is called, we need to have these pointers set already.
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*/
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curl_malloc_callback Curl_cmalloc = (curl_malloc_callback)malloc;
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curl_free_callback Curl_cfree = (curl_free_callback)free;
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curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
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curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)system_strdup;
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curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;
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#if defined(WIN32) && defined(UNICODE)
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curl_wcsdup_callback Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
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#endif
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#else
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/*
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* Symbian OS doesn't support initialization to code in writable static data.
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* Initialization will occur in the curl_global_init() call.
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*/
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curl_malloc_callback Curl_cmalloc;
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curl_free_callback Curl_cfree;
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curl_realloc_callback Curl_crealloc;
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curl_strdup_callback Curl_cstrdup;
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curl_calloc_callback Curl_ccalloc;
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#endif
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#if defined(_MSC_VER) && defined(_DLL) && !defined(__POCC__)
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# pragma warning(default:4232) /* MSVC extension, dllimport identity */
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#endif
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/**
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* curl_global_init() globally initializes curl given a bitwise set of the
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* different features of what to initialize.
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*/
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static CURLcode global_init(long flags, bool memoryfuncs)
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{
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if(initialized++)
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return CURLE_OK;
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if(memoryfuncs) {
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/* Setup the default memory functions here (again) */
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Curl_cmalloc = (curl_malloc_callback)malloc;
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Curl_cfree = (curl_free_callback)free;
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Curl_crealloc = (curl_realloc_callback)realloc;
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Curl_cstrdup = (curl_strdup_callback)system_strdup;
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Curl_ccalloc = (curl_calloc_callback)calloc;
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#if defined(WIN32) && defined(UNICODE)
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Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
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#endif
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}
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if(!Curl_ssl_init()) {
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DEBUGF(fprintf(stderr, "Error: Curl_ssl_init failed\n"));
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return CURLE_FAILED_INIT;
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}
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#ifdef WIN32
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if(win32_init(flags)) {
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DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
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return CURLE_FAILED_INIT;
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}
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#endif
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#ifdef __AMIGA__
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if(!Curl_amiga_init()) {
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DEBUGF(fprintf(stderr, "Error: Curl_amiga_init failed\n"));
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return CURLE_FAILED_INIT;
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}
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#endif
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#ifdef NETWARE
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if(netware_init()) {
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DEBUGF(fprintf(stderr, "Warning: LONG namespace not available\n"));
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}
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#endif
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if(Curl_resolver_global_init()) {
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DEBUGF(fprintf(stderr, "Error: resolver_global_init failed\n"));
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return CURLE_FAILED_INIT;
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}
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(void)Curl_ipv6works();
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#if defined(USE_LIBSSH2) && defined(HAVE_LIBSSH2_INIT)
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if(libssh2_init(0)) {
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DEBUGF(fprintf(stderr, "Error: libssh2_init failed\n"));
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return CURLE_FAILED_INIT;
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}
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#endif
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#if defined(USE_LIBSSH)
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if(ssh_init()) {
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DEBUGF(fprintf(stderr, "Error: libssh_init failed\n"));
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return CURLE_FAILED_INIT;
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}
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#endif
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if(flags & CURL_GLOBAL_ACK_EINTR)
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Curl_ack_eintr = 1;
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init_flags = flags;
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Curl_version_init();
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return CURLE_OK;
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}
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/**
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* curl_global_init() globally initializes curl given a bitwise set of the
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* different features of what to initialize.
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*/
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CURLcode curl_global_init(long flags)
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{
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return global_init(flags, TRUE);
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}
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/*
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* curl_global_init_mem() globally initializes curl and also registers the
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* user provided callback routines.
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*/
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CURLcode curl_global_init_mem(long flags, curl_malloc_callback m,
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curl_free_callback f, curl_realloc_callback r,
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curl_strdup_callback s, curl_calloc_callback c)
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{
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/* Invalid input, return immediately */
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if(!m || !f || !r || !s || !c)
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return CURLE_FAILED_INIT;
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if(initialized) {
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/* Already initialized, don't do it again, but bump the variable anyway to
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work like curl_global_init() and require the same amount of cleanup
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calls. */
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initialized++;
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return CURLE_OK;
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}
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/* set memory functions before global_init() in case it wants memory
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functions */
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Curl_cmalloc = m;
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Curl_cfree = f;
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Curl_cstrdup = s;
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Curl_crealloc = r;
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Curl_ccalloc = c;
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/* Call the actual init function, but without setting */
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return global_init(flags, FALSE);
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}
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/**
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* curl_global_cleanup() globally cleanups curl, uses the value of
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* "init_flags" to determine what needs to be cleaned up and what doesn't.
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*/
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void curl_global_cleanup(void)
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{
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if(!initialized)
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return;
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if(--initialized)
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return;
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Curl_global_host_cache_dtor();
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Curl_ssl_cleanup();
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Curl_resolver_global_cleanup();
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#ifdef WIN32
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win32_cleanup();
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#endif
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Curl_amiga_cleanup();
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#if defined(USE_LIBSSH2) && defined(HAVE_LIBSSH2_EXIT)
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(void)libssh2_exit();
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#endif
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#if defined(USE_LIBSSH)
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(void)ssh_finalize();
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#endif
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init_flags = 0;
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}
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/*
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* curl_easy_init() is the external interface to alloc, setup and init an
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* easy handle that is returned. If anything goes wrong, NULL is returned.
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*/
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struct Curl_easy *curl_easy_init(void)
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{
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CURLcode result;
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struct Curl_easy *data;
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/* Make sure we inited the global SSL stuff */
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if(!initialized) {
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result = curl_global_init(CURL_GLOBAL_DEFAULT);
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if(result) {
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/* something in the global init failed, return nothing */
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DEBUGF(fprintf(stderr, "Error: curl_global_init failed\n"));
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return NULL;
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}
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}
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/* We use curl_open() with undefined URL so far */
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result = Curl_open(&data);
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if(result) {
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DEBUGF(fprintf(stderr, "Error: Curl_open failed\n"));
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return NULL;
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}
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return data;
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}
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#ifdef CURLDEBUG
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struct socketmonitor {
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struct socketmonitor *next; /* the next node in the list or NULL */
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struct pollfd socket; /* socket info of what to monitor */
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};
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struct events {
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long ms; /* timeout, run the timeout function when reached */
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bool msbump; /* set TRUE when timeout is set by callback */
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int num_sockets; /* number of nodes in the monitor list */
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struct socketmonitor *list; /* list of sockets to monitor */
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int running_handles; /* store the returned number */
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};
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/* events_timer
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*
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* Callback that gets called with a new value when the timeout should be
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* updated.
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*/
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static int events_timer(struct Curl_multi *multi, /* multi handle */
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long timeout_ms, /* see above */
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void *userp) /* private callback pointer */
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{
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struct events *ev = userp;
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(void)multi;
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if(timeout_ms == -1)
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/* timeout removed */
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timeout_ms = 0;
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else if(timeout_ms == 0)
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/* timeout is already reached! */
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timeout_ms = 1; /* trigger asap */
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ev->ms = timeout_ms;
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ev->msbump = TRUE;
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return 0;
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}
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/* poll2cselect
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*
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* convert from poll() bit definitions to libcurl's CURL_CSELECT_* ones
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*/
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static int poll2cselect(int pollmask)
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{
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int omask = 0;
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if(pollmask & POLLIN)
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omask |= CURL_CSELECT_IN;
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if(pollmask & POLLOUT)
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omask |= CURL_CSELECT_OUT;
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if(pollmask & POLLERR)
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omask |= CURL_CSELECT_ERR;
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return omask;
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}
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/* socketcb2poll
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*
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* convert from libcurl' CURL_POLL_* bit definitions to poll()'s
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*/
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static short socketcb2poll(int pollmask)
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{
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short omask = 0;
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if(pollmask & CURL_POLL_IN)
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omask |= POLLIN;
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if(pollmask & CURL_POLL_OUT)
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omask |= POLLOUT;
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return omask;
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}
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/* events_socket
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*
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* Callback that gets called with information about socket activity to
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* monitor.
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*/
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static int events_socket(struct Curl_easy *easy, /* easy handle */
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curl_socket_t s, /* socket */
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int what, /* see above */
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void *userp, /* private callback
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pointer */
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void *socketp) /* private socket
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pointer */
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{
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struct events *ev = userp;
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struct socketmonitor *m;
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struct socketmonitor *prev = NULL;
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#if defined(CURL_DISABLE_VERBOSE_STRINGS)
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(void) easy;
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#endif
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(void)socketp;
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m = ev->list;
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while(m) {
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if(m->socket.fd == s) {
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if(what == CURL_POLL_REMOVE) {
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struct socketmonitor *nxt = m->next;
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/* remove this node from the list of monitored sockets */
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if(prev)
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prev->next = nxt;
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else
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ev->list = nxt;
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free(m);
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m = nxt;
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infof(easy, "socket cb: socket %d REMOVED\n", s);
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}
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else {
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/* The socket 's' is already being monitored, update the activity
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mask. Convert from libcurl bitmask to the poll one. */
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m->socket.events = socketcb2poll(what);
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infof(easy, "socket cb: socket %d UPDATED as %s%s\n", s,
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what&CURL_POLL_IN?"IN":"",
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what&CURL_POLL_OUT?"OUT":"");
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}
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break;
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}
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prev = m;
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|
m = m->next; /* move to next node */
|
|
}
|
|
if(!m) {
|
|
if(what == CURL_POLL_REMOVE) {
|
|
/* this happens a bit too often, libcurl fix perhaps? */
|
|
/* fprintf(stderr,
|
|
"%s: socket %d asked to be REMOVED but not present!\n",
|
|
__func__, s); */
|
|
}
|
|
else {
|
|
m = malloc(sizeof(struct socketmonitor));
|
|
if(m) {
|
|
m->next = ev->list;
|
|
m->socket.fd = s;
|
|
m->socket.events = socketcb2poll(what);
|
|
m->socket.revents = 0;
|
|
ev->list = m;
|
|
infof(easy, "socket cb: socket %d ADDED as %s%s\n", s,
|
|
what&CURL_POLL_IN?"IN":"",
|
|
what&CURL_POLL_OUT?"OUT":"");
|
|
}
|
|
else
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* events_setup()
|
|
*
|
|
* Do the multi handle setups that only event-based transfers need.
|
|
*/
|
|
static void events_setup(struct Curl_multi *multi, struct events *ev)
|
|
{
|
|
/* timer callback */
|
|
curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, events_timer);
|
|
curl_multi_setopt(multi, CURLMOPT_TIMERDATA, ev);
|
|
|
|
/* socket callback */
|
|
curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, events_socket);
|
|
curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, ev);
|
|
}
|
|
|
|
|
|
/* wait_or_timeout()
|
|
*
|
|
* waits for activity on any of the given sockets, or the timeout to trigger.
|
|
*/
|
|
|
|
static CURLcode wait_or_timeout(struct Curl_multi *multi, struct events *ev)
|
|
{
|
|
bool done = FALSE;
|
|
CURLMcode mcode = CURLM_OK;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
while(!done) {
|
|
CURLMsg *msg;
|
|
struct socketmonitor *m;
|
|
struct pollfd *f;
|
|
struct pollfd fds[4];
|
|
int numfds = 0;
|
|
int pollrc;
|
|
int i;
|
|
struct curltime before;
|
|
struct curltime after;
|
|
|
|
/* populate the fds[] array */
|
|
for(m = ev->list, f = &fds[0]; m; m = m->next) {
|
|
f->fd = m->socket.fd;
|
|
f->events = m->socket.events;
|
|
f->revents = 0;
|
|
/* fprintf(stderr, "poll() %d check socket %d\n", numfds, f->fd); */
|
|
f++;
|
|
numfds++;
|
|
}
|
|
|
|
/* get the time stamp to use to figure out how long poll takes */
|
|
before = Curl_now();
|
|
|
|
/* wait for activity or timeout */
|
|
pollrc = Curl_poll(fds, numfds, (int)ev->ms);
|
|
|
|
after = Curl_now();
|
|
|
|
ev->msbump = FALSE; /* reset here */
|
|
|
|
if(0 == pollrc) {
|
|
/* timeout! */
|
|
ev->ms = 0;
|
|
/* fprintf(stderr, "call curl_multi_socket_action(TIMEOUT)\n"); */
|
|
mcode = curl_multi_socket_action(multi, CURL_SOCKET_TIMEOUT, 0,
|
|
&ev->running_handles);
|
|
}
|
|
else if(pollrc > 0) {
|
|
/* loop over the monitored sockets to see which ones had activity */
|
|
for(i = 0; i< numfds; i++) {
|
|
if(fds[i].revents) {
|
|
/* socket activity, tell libcurl */
|
|
int act = poll2cselect(fds[i].revents); /* convert */
|
|
infof(multi->easyp, "call curl_multi_socket_action(socket %d)\n",
|
|
fds[i].fd);
|
|
mcode = curl_multi_socket_action(multi, fds[i].fd, act,
|
|
&ev->running_handles);
|
|
}
|
|
}
|
|
|
|
if(!ev->msbump) {
|
|
/* If nothing updated the timeout, we decrease it by the spent time.
|
|
* If it was updated, it has the new timeout time stored already.
|
|
*/
|
|
timediff_t timediff = Curl_timediff(after, before);
|
|
if(timediff > 0) {
|
|
if(timediff > ev->ms)
|
|
ev->ms = 0;
|
|
else
|
|
ev->ms -= (long)timediff;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
return CURLE_RECV_ERROR;
|
|
|
|
if(mcode)
|
|
return CURLE_URL_MALFORMAT; /* TODO: return a proper error! */
|
|
|
|
/* we don't really care about the "msgs_in_queue" value returned in the
|
|
second argument */
|
|
msg = curl_multi_info_read(multi, &pollrc);
|
|
if(msg) {
|
|
result = msg->data.result;
|
|
done = TRUE;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* easy_events()
|
|
*
|
|
* Runs a transfer in a blocking manner using the events-based API
|
|
*/
|
|
static CURLcode easy_events(struct Curl_multi *multi)
|
|
{
|
|
/* this struct is made static to allow it to be used after this function
|
|
returns and curl_multi_remove_handle() is called */
|
|
static struct events evs = {2, FALSE, 0, NULL, 0};
|
|
|
|
/* if running event-based, do some further multi inits */
|
|
events_setup(multi, &evs);
|
|
|
|
return wait_or_timeout(multi, &evs);
|
|
}
|
|
#else /* CURLDEBUG */
|
|
/* when not built with debug, this function doesn't exist */
|
|
#define easy_events(x) CURLE_NOT_BUILT_IN
|
|
#endif
|
|
|
|
static CURLcode easy_transfer(struct Curl_multi *multi)
|
|
{
|
|
bool done = FALSE;
|
|
CURLMcode mcode = CURLM_OK;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
while(!done && !mcode) {
|
|
int still_running = 0;
|
|
bool gotsocket = FALSE;
|
|
|
|
mcode = Curl_multi_wait(multi, NULL, 0, 1000, NULL, &gotsocket);
|
|
|
|
if(!mcode) {
|
|
if(!gotsocket) {
|
|
long sleep_ms;
|
|
|
|
/* If it returns without any filedescriptor instantly, we need to
|
|
avoid busy-looping during periods where it has nothing particular
|
|
to wait for */
|
|
curl_multi_timeout(multi, &sleep_ms);
|
|
if(sleep_ms) {
|
|
if(sleep_ms > 1000)
|
|
sleep_ms = 1000;
|
|
Curl_wait_ms((int)sleep_ms);
|
|
}
|
|
}
|
|
|
|
mcode = curl_multi_perform(multi, &still_running);
|
|
}
|
|
|
|
/* only read 'still_running' if curl_multi_perform() return OK */
|
|
if(!mcode && !still_running) {
|
|
int rc;
|
|
CURLMsg *msg = curl_multi_info_read(multi, &rc);
|
|
if(msg) {
|
|
result = msg->data.result;
|
|
done = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Make sure to return some kind of error if there was a multi problem */
|
|
if(mcode) {
|
|
result = (mcode == CURLM_OUT_OF_MEMORY) ? CURLE_OUT_OF_MEMORY :
|
|
/* The other multi errors should never happen, so return
|
|
something suitably generic */
|
|
CURLE_BAD_FUNCTION_ARGUMENT;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* easy_perform() is the external interface that performs a blocking
|
|
* transfer as previously setup.
|
|
*
|
|
* CONCEPT: This function creates a multi handle, adds the easy handle to it,
|
|
* runs curl_multi_perform() until the transfer is done, then detaches the
|
|
* easy handle, destroys the multi handle and returns the easy handle's return
|
|
* code.
|
|
*
|
|
* REALITY: it can't just create and destroy the multi handle that easily. It
|
|
* needs to keep it around since if this easy handle is used again by this
|
|
* function, the same multi handle must be re-used so that the same pools and
|
|
* caches can be used.
|
|
*
|
|
* DEBUG: if 'events' is set TRUE, this function will use a replacement engine
|
|
* instead of curl_multi_perform() and use curl_multi_socket_action().
|
|
*/
|
|
static CURLcode easy_perform(struct Curl_easy *data, bool events)
|
|
{
|
|
struct Curl_multi *multi;
|
|
CURLMcode mcode;
|
|
CURLcode result = CURLE_OK;
|
|
SIGPIPE_VARIABLE(pipe_st);
|
|
|
|
if(!data)
|
|
return CURLE_BAD_FUNCTION_ARGUMENT;
|
|
|
|
if(data->set.errorbuffer)
|
|
/* clear this as early as possible */
|
|
data->set.errorbuffer[0] = 0;
|
|
|
|
if(data->multi) {
|
|
failf(data, "easy handle already used in multi handle");
|
|
return CURLE_FAILED_INIT;
|
|
}
|
|
|
|
if(data->multi_easy)
|
|
multi = data->multi_easy;
|
|
else {
|
|
/* this multi handle will only ever have a single easy handled attached
|
|
to it, so make it use minimal hashes */
|
|
multi = Curl_multi_handle(1, 3);
|
|
if(!multi)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
data->multi_easy = multi;
|
|
}
|
|
|
|
if(multi->in_callback)
|
|
return CURLE_RECURSIVE_API_CALL;
|
|
|
|
/* Copy the MAXCONNECTS option to the multi handle */
|
|
curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, data->set.maxconnects);
|
|
|
|
mcode = curl_multi_add_handle(multi, data);
|
|
if(mcode) {
|
|
curl_multi_cleanup(multi);
|
|
if(mcode == CURLM_OUT_OF_MEMORY)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
return CURLE_FAILED_INIT;
|
|
}
|
|
|
|
sigpipe_ignore(data, &pipe_st);
|
|
|
|
/* assign this after curl_multi_add_handle() since that function checks for
|
|
it and rejects this handle otherwise */
|
|
data->multi = multi;
|
|
|
|
/* run the transfer */
|
|
result = events ? easy_events(multi) : easy_transfer(multi);
|
|
|
|
/* ignoring the return code isn't nice, but atm we can't really handle
|
|
a failure here, room for future improvement! */
|
|
(void)curl_multi_remove_handle(multi, data);
|
|
|
|
sigpipe_restore(&pipe_st);
|
|
|
|
/* The multi handle is kept alive, owned by the easy handle */
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* curl_easy_perform() is the external interface that performs a blocking
|
|
* transfer as previously setup.
|
|
*/
|
|
CURLcode curl_easy_perform(struct Curl_easy *data)
|
|
{
|
|
return easy_perform(data, FALSE);
|
|
}
|
|
|
|
#ifdef CURLDEBUG
|
|
/*
|
|
* curl_easy_perform_ev() is the external interface that performs a blocking
|
|
* transfer using the event-based API internally.
|
|
*/
|
|
CURLcode curl_easy_perform_ev(struct Curl_easy *data)
|
|
{
|
|
return easy_perform(data, TRUE);
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* curl_easy_cleanup() is the external interface to cleaning/freeing the given
|
|
* easy handle.
|
|
*/
|
|
void curl_easy_cleanup(struct Curl_easy *data)
|
|
{
|
|
SIGPIPE_VARIABLE(pipe_st);
|
|
|
|
if(!data)
|
|
return;
|
|
|
|
sigpipe_ignore(data, &pipe_st);
|
|
Curl_close(data);
|
|
sigpipe_restore(&pipe_st);
|
|
}
|
|
|
|
/*
|
|
* curl_easy_getinfo() is an external interface that allows an app to retrieve
|
|
* information from a performed transfer and similar.
|
|
*/
|
|
#undef curl_easy_getinfo
|
|
CURLcode curl_easy_getinfo(struct Curl_easy *data, CURLINFO info, ...)
|
|
{
|
|
va_list arg;
|
|
void *paramp;
|
|
CURLcode result;
|
|
|
|
va_start(arg, info);
|
|
paramp = va_arg(arg, void *);
|
|
|
|
result = Curl_getinfo(data, info, paramp);
|
|
|
|
va_end(arg);
|
|
return result;
|
|
}
|
|
|
|
static CURLcode dupset(struct Curl_easy *dst, struct Curl_easy *src)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
enum dupstring i;
|
|
|
|
/* Copy src->set into dst->set first, then deal with the strings
|
|
afterwards */
|
|
dst->set = src->set;
|
|
Curl_mime_initpart(&dst->set.mimepost, dst);
|
|
|
|
/* clear all string pointers first */
|
|
memset(dst->set.str, 0, STRING_LAST * sizeof(char *));
|
|
|
|
/* duplicate all strings */
|
|
for(i = (enum dupstring)0; i< STRING_LASTZEROTERMINATED; i++) {
|
|
result = Curl_setstropt(&dst->set.str[i], src->set.str[i]);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
/* duplicate memory areas pointed to */
|
|
i = STRING_COPYPOSTFIELDS;
|
|
if(src->set.postfieldsize && src->set.str[i]) {
|
|
/* postfieldsize is curl_off_t, Curl_memdup() takes a size_t ... */
|
|
dst->set.str[i] = Curl_memdup(src->set.str[i],
|
|
curlx_sotouz(src->set.postfieldsize));
|
|
if(!dst->set.str[i])
|
|
return CURLE_OUT_OF_MEMORY;
|
|
/* point to the new copy */
|
|
dst->set.postfields = dst->set.str[i];
|
|
}
|
|
|
|
/* Duplicate mime data. */
|
|
result = Curl_mime_duppart(&dst->set.mimepost, &src->set.mimepost);
|
|
|
|
if(src->set.resolve)
|
|
dst->change.resolve = dst->set.resolve;
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* curl_easy_duphandle() is an external interface to allow duplication of a
|
|
* given input easy handle. The returned handle will be a new working handle
|
|
* with all options set exactly as the input source handle.
|
|
*/
|
|
struct Curl_easy *curl_easy_duphandle(struct Curl_easy *data)
|
|
{
|
|
struct Curl_easy *outcurl = calloc(1, sizeof(struct Curl_easy));
|
|
if(NULL == outcurl)
|
|
goto fail;
|
|
|
|
/*
|
|
* We setup a few buffers we need. We should probably make them
|
|
* get setup on-demand in the code, as that would probably decrease
|
|
* the likeliness of us forgetting to init a buffer here in the future.
|
|
*/
|
|
outcurl->set.buffer_size = data->set.buffer_size;
|
|
outcurl->state.buffer = malloc(outcurl->set.buffer_size + 1);
|
|
if(!outcurl->state.buffer)
|
|
goto fail;
|
|
|
|
outcurl->state.headerbuff = malloc(HEADERSIZE);
|
|
if(!outcurl->state.headerbuff)
|
|
goto fail;
|
|
outcurl->state.headersize = HEADERSIZE;
|
|
|
|
/* copy all userdefined values */
|
|
if(dupset(outcurl, data))
|
|
goto fail;
|
|
|
|
/* the connection cache is setup on demand */
|
|
outcurl->state.conn_cache = NULL;
|
|
|
|
outcurl->state.lastconnect = NULL;
|
|
|
|
outcurl->progress.flags = data->progress.flags;
|
|
outcurl->progress.callback = data->progress.callback;
|
|
|
|
if(data->cookies) {
|
|
/* If cookies are enabled in the parent handle, we enable them
|
|
in the clone as well! */
|
|
outcurl->cookies = Curl_cookie_init(data,
|
|
data->cookies->filename,
|
|
outcurl->cookies,
|
|
data->set.cookiesession);
|
|
if(!outcurl->cookies)
|
|
goto fail;
|
|
}
|
|
|
|
/* duplicate all values in 'change' */
|
|
if(data->change.cookielist) {
|
|
outcurl->change.cookielist =
|
|
Curl_slist_duplicate(data->change.cookielist);
|
|
if(!outcurl->change.cookielist)
|
|
goto fail;
|
|
}
|
|
|
|
if(data->change.url) {
|
|
outcurl->change.url = strdup(data->change.url);
|
|
if(!outcurl->change.url)
|
|
goto fail;
|
|
outcurl->change.url_alloc = TRUE;
|
|
}
|
|
|
|
if(data->change.referer) {
|
|
outcurl->change.referer = strdup(data->change.referer);
|
|
if(!outcurl->change.referer)
|
|
goto fail;
|
|
outcurl->change.referer_alloc = TRUE;
|
|
}
|
|
|
|
/* Reinitialize an SSL engine for the new handle
|
|
* note: the engine name has already been copied by dupset */
|
|
if(outcurl->set.str[STRING_SSL_ENGINE]) {
|
|
if(Curl_ssl_set_engine(outcurl, outcurl->set.str[STRING_SSL_ENGINE]))
|
|
goto fail;
|
|
}
|
|
|
|
/* Clone the resolver handle, if present, for the new handle */
|
|
if(Curl_resolver_duphandle(outcurl,
|
|
&outcurl->state.resolver,
|
|
data->state.resolver))
|
|
goto fail;
|
|
|
|
Curl_convert_setup(outcurl);
|
|
|
|
Curl_initinfo(outcurl);
|
|
|
|
outcurl->magic = CURLEASY_MAGIC_NUMBER;
|
|
|
|
/* we reach this point and thus we are OK */
|
|
|
|
return outcurl;
|
|
|
|
fail:
|
|
|
|
if(outcurl) {
|
|
curl_slist_free_all(outcurl->change.cookielist);
|
|
outcurl->change.cookielist = NULL;
|
|
Curl_safefree(outcurl->state.buffer);
|
|
Curl_safefree(outcurl->state.headerbuff);
|
|
Curl_safefree(outcurl->change.url);
|
|
Curl_safefree(outcurl->change.referer);
|
|
Curl_freeset(outcurl);
|
|
free(outcurl);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* curl_easy_reset() is an external interface that allows an app to re-
|
|
* initialize a session handle to the default values.
|
|
*/
|
|
void curl_easy_reset(struct Curl_easy *data)
|
|
{
|
|
Curl_free_request_state(data);
|
|
|
|
/* zero out UserDefined data: */
|
|
Curl_freeset(data);
|
|
memset(&data->set, 0, sizeof(struct UserDefined));
|
|
(void)Curl_init_userdefined(data);
|
|
|
|
/* zero out Progress data: */
|
|
memset(&data->progress, 0, sizeof(struct Progress));
|
|
|
|
/* zero out PureInfo data: */
|
|
Curl_initinfo(data);
|
|
|
|
data->progress.flags |= PGRS_HIDE;
|
|
data->state.current_speed = -1; /* init to negative == impossible */
|
|
|
|
/* zero out authentication data: */
|
|
memset(&data->state.authhost, 0, sizeof(struct auth));
|
|
memset(&data->state.authproxy, 0, sizeof(struct auth));
|
|
Curl_digest_cleanup(data);
|
|
}
|
|
|
|
/*
|
|
* curl_easy_pause() allows an application to pause or unpause a specific
|
|
* transfer and direction. This function sets the full new state for the
|
|
* current connection this easy handle operates on.
|
|
*
|
|
* NOTE: if you have the receiving paused and you call this function to remove
|
|
* the pausing, you may get your write callback called at this point.
|
|
*
|
|
* Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
|
|
*
|
|
* NOTE: This is one of few API functions that are allowed to be called from
|
|
* within a callback.
|
|
*/
|
|
CURLcode curl_easy_pause(struct Curl_easy *data, int action)
|
|
{
|
|
struct SingleRequest *k = &data->req;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
/* first switch off both pause bits */
|
|
int newstate = k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
|
|
|
|
/* set the new desired pause bits */
|
|
newstate |= ((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
|
|
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
|
|
|
|
/* put it back in the keepon */
|
|
k->keepon = newstate;
|
|
|
|
if(!(newstate & KEEP_RECV_PAUSE) && data->state.tempcount) {
|
|
/* there are buffers for sending that can be delivered as the receive
|
|
pausing is lifted! */
|
|
unsigned int i;
|
|
unsigned int count = data->state.tempcount;
|
|
struct tempbuf writebuf[3]; /* there can only be three */
|
|
struct connectdata *conn = data->conn;
|
|
struct Curl_easy *saved_data = NULL;
|
|
|
|
/* copy the structs to allow for immediate re-pausing */
|
|
for(i = 0; i < data->state.tempcount; i++) {
|
|
writebuf[i] = data->state.tempwrite[i];
|
|
data->state.tempwrite[i].buf = NULL;
|
|
}
|
|
data->state.tempcount = 0;
|
|
|
|
/* set the connection's current owner */
|
|
if(conn->data != data) {
|
|
saved_data = conn->data;
|
|
conn->data = data;
|
|
}
|
|
|
|
for(i = 0; i < count; i++) {
|
|
/* even if one function returns error, this loops through and frees all
|
|
buffers */
|
|
if(!result)
|
|
result = Curl_client_write(conn, writebuf[i].type, writebuf[i].buf,
|
|
writebuf[i].len);
|
|
free(writebuf[i].buf);
|
|
}
|
|
|
|
/* recover previous owner of the connection */
|
|
if(saved_data)
|
|
conn->data = saved_data;
|
|
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
/* if there's no error and we're not pausing both directions, we want
|
|
to have this handle checked soon */
|
|
if(!result &&
|
|
((newstate&(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) !=
|
|
(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) )
|
|
Curl_expire(data, 0, EXPIRE_RUN_NOW); /* get this handle going again */
|
|
|
|
/* This transfer may have been moved in or out of the bundle, update
|
|
the corresponding socket callback, if used */
|
|
Curl_updatesocket(data);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static CURLcode easy_connection(struct Curl_easy *data,
|
|
curl_socket_t *sfd,
|
|
struct connectdata **connp)
|
|
{
|
|
if(data == NULL)
|
|
return CURLE_BAD_FUNCTION_ARGUMENT;
|
|
|
|
/* only allow these to be called on handles with CURLOPT_CONNECT_ONLY */
|
|
if(!data->set.connect_only) {
|
|
failf(data, "CONNECT_ONLY is required!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
}
|
|
|
|
*sfd = Curl_getconnectinfo(data, connp);
|
|
|
|
if(*sfd == CURL_SOCKET_BAD) {
|
|
failf(data, "Failed to get recent socket");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Receives data from the connected socket. Use after successful
|
|
* curl_easy_perform() with CURLOPT_CONNECT_ONLY option.
|
|
* Returns CURLE_OK on success, error code on error.
|
|
*/
|
|
CURLcode curl_easy_recv(struct Curl_easy *data, void *buffer, size_t buflen,
|
|
size_t *n)
|
|
{
|
|
curl_socket_t sfd;
|
|
CURLcode result;
|
|
ssize_t n1;
|
|
struct connectdata *c;
|
|
|
|
if(Curl_is_in_callback(data))
|
|
return CURLE_RECURSIVE_API_CALL;
|
|
|
|
result = easy_connection(data, &sfd, &c);
|
|
if(result)
|
|
return result;
|
|
|
|
*n = 0;
|
|
result = Curl_read(c, sfd, buffer, buflen, &n1);
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
*n = (size_t)n1;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Sends data over the connected socket. Use after successful
|
|
* curl_easy_perform() with CURLOPT_CONNECT_ONLY option.
|
|
*/
|
|
CURLcode curl_easy_send(struct Curl_easy *data, const void *buffer,
|
|
size_t buflen, size_t *n)
|
|
{
|
|
curl_socket_t sfd;
|
|
CURLcode result;
|
|
ssize_t n1;
|
|
struct connectdata *c = NULL;
|
|
|
|
if(Curl_is_in_callback(data))
|
|
return CURLE_RECURSIVE_API_CALL;
|
|
|
|
result = easy_connection(data, &sfd, &c);
|
|
if(result)
|
|
return result;
|
|
|
|
*n = 0;
|
|
result = Curl_write(c, sfd, buffer, buflen, &n1);
|
|
|
|
if(n1 == -1)
|
|
return CURLE_SEND_ERROR;
|
|
|
|
/* detect EAGAIN */
|
|
if(!result && !n1)
|
|
return CURLE_AGAIN;
|
|
|
|
*n = (size_t)n1;
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Performs connection upkeep for the given session handle.
|
|
*/
|
|
CURLcode curl_easy_upkeep(struct Curl_easy *data)
|
|
{
|
|
/* Verify that we got an easy handle we can work with. */
|
|
if(!GOOD_EASY_HANDLE(data))
|
|
return CURLE_BAD_FUNCTION_ARGUMENT;
|
|
|
|
if(data->multi_easy) {
|
|
/* Use the common function to keep connections alive. */
|
|
return Curl_upkeep(&data->multi_easy->conn_cache, data);
|
|
}
|
|
else {
|
|
/* No connections, so just return success */
|
|
return CURLE_OK;
|
|
}
|
|
}
|