1251 строка
33 KiB
C
1251 строка
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 - 2022, 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.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 "warnless.h"
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#include "multiif.h"
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#include "sigpipe.h"
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#include "vssh/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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#include "http2.h"
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#include "dynbuf.h"
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#include "altsvc.h"
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#include "hsts.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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/* 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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* 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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/*
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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;
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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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#ifdef DEBUGBUILD
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static char *leakpointer;
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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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goto fail;
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}
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#ifdef WIN32
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if(Curl_win32_init(flags)) {
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DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
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goto fail;
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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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goto fail;
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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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goto fail;
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}
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#if defined(USE_SSH)
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if(Curl_ssh_init()) {
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goto fail;
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}
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#endif
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#ifdef USE_WOLFSSH
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if(WS_SUCCESS != wolfSSH_Init()) {
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DEBUGF(fprintf(stderr, "Error: wolfSSH_Init failed\n"));
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return CURLE_FAILED_INIT;
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}
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#endif
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init_flags = flags;
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#ifdef DEBUGBUILD
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if(getenv("CURL_GLOBAL_INIT"))
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/* alloc data that will leak if *cleanup() is not called! */
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leakpointer = malloc(1);
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#endif
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return CURLE_OK;
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fail:
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initialized--; /* undo the increase */
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return CURLE_FAILED_INIT;
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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_ssl_cleanup();
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Curl_resolver_global_cleanup();
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#ifdef WIN32
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Curl_win32_cleanup(init_flags);
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#endif
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Curl_amiga_cleanup();
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Curl_ssh_cleanup();
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#ifdef USE_WOLFSSH
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(void)wolfSSH_Cleanup();
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#endif
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#ifdef DEBUGBUILD
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free(leakpointer);
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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", 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", 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 */
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}
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if(!m) {
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if(what == CURL_POLL_REMOVE) {
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/* this happens a bit too often, libcurl fix perhaps? */
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/* fprintf(stderr,
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"%s: socket %d asked to be REMOVED but not present!\n",
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__func__, s); */
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}
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else {
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m = malloc(sizeof(struct socketmonitor));
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if(m) {
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m->next = ev->list;
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m->socket.fd = s;
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m->socket.events = socketcb2poll(what);
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m->socket.revents = 0;
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ev->list = m;
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infof(easy, "socket cb: socket %d ADDED as %s%s", 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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else
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return CURLE_OUT_OF_MEMORY;
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}
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}
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return 0;
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}
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/*
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* events_setup()
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*
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* Do the multi handle setups that only event-based transfers need.
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*/
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static void events_setup(struct Curl_multi *multi, struct events *ev)
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{
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/* timer callback */
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curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, events_timer);
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curl_multi_setopt(multi, CURLMOPT_TIMERDATA, ev);
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/* socket callback */
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curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, events_socket);
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curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, ev);
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}
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/* wait_or_timeout()
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*
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* waits for activity on any of the given sockets, or the timeout to trigger.
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*/
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static CURLcode wait_or_timeout(struct Curl_multi *multi, struct events *ev)
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{
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bool done = FALSE;
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CURLMcode mcode = CURLM_OK;
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CURLcode result = CURLE_OK;
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while(!done) {
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CURLMsg *msg;
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struct socketmonitor *m;
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struct pollfd *f;
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struct pollfd fds[4];
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int numfds = 0;
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int pollrc;
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int i;
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struct curltime before;
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struct curltime after;
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/* populate the fds[] array */
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for(m = ev->list, f = &fds[0]; m; m = m->next) {
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f->fd = m->socket.fd;
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f->events = m->socket.events;
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f->revents = 0;
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/* fprintf(stderr, "poll() %d check socket %d\n", numfds, f->fd); */
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f++;
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numfds++;
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}
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/* get the time stamp to use to figure out how long poll takes */
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before = Curl_now();
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/* wait for activity or timeout */
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pollrc = Curl_poll(fds, numfds, ev->ms);
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after = Curl_now();
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ev->msbump = FALSE; /* reset here */
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if(0 == pollrc) {
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/* timeout! */
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ev->ms = 0;
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/* fprintf(stderr, "call curl_multi_socket_action(TIMEOUT)\n"); */
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mcode = curl_multi_socket_action(multi, CURL_SOCKET_TIMEOUT, 0,
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&ev->running_handles);
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}
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else if(pollrc > 0) {
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/* loop over the monitored sockets to see which ones had activity */
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for(i = 0; i< numfds; i++) {
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if(fds[i].revents) {
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/* socket activity, tell libcurl */
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int act = poll2cselect(fds[i].revents); /* convert */
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infof(multi->easyp, "call curl_multi_socket_action(socket %d)",
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fds[i].fd);
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mcode = curl_multi_socket_action(multi, fds[i].fd, act,
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&ev->running_handles);
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}
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}
|
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|
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if(!ev->msbump) {
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/* If nothing updated the timeout, we decrease it by the spent time.
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|
* If it was updated, it has the new timeout time stored already.
|
|
*/
|
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timediff_t timediff = Curl_timediff(after, before);
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|
if(timediff > 0) {
|
|
if(timediff > ev->ms)
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ev->ms = 0;
|
|
else
|
|
ev->ms -= (long)timediff;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
return CURLE_RECV_ERROR;
|
|
|
|
if(mcode)
|
|
return CURLE_URL_MALFORMAT;
|
|
|
|
/* 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;
|
|
|
|
mcode = curl_multi_poll(multi, NULL, 0, 1000, NULL);
|
|
|
|
if(!mcode)
|
|
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);
|
|
data->multi_easy = NULL;
|
|
if(mcode == CURLM_OUT_OF_MEMORY)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
return CURLE_FAILED_INIT;
|
|
}
|
|
|
|
sigpipe_ignore(data, &pipe_st);
|
|
|
|
/* 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;
|
|
enum dupblob j;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* clear all blob pointers first */
|
|
memset(dst->set.blobs, 0, BLOB_LAST * sizeof(struct curl_blob *));
|
|
/* duplicate all blobs */
|
|
for(j = (enum dupblob)0; j < BLOB_LAST; j++) {
|
|
result = Curl_setblobopt(&dst->set.blobs[j], src->set.blobs[j]);
|
|
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->state.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(!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;
|
|
|
|
/* copy all userdefined values */
|
|
if(dupset(outcurl, data))
|
|
goto fail;
|
|
|
|
Curl_dyn_init(&outcurl->state.headerb, CURL_MAX_HTTP_HEADER);
|
|
|
|
/* the connection cache is setup on demand */
|
|
outcurl->state.conn_cache = NULL;
|
|
outcurl->state.lastconnect_id = -1;
|
|
|
|
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->state.cookielist) {
|
|
outcurl->state.cookielist =
|
|
Curl_slist_duplicate(data->state.cookielist);
|
|
if(!outcurl->state.cookielist)
|
|
goto fail;
|
|
}
|
|
|
|
if(data->state.url) {
|
|
outcurl->state.url = strdup(data->state.url);
|
|
if(!outcurl->state.url)
|
|
goto fail;
|
|
outcurl->state.url_alloc = TRUE;
|
|
}
|
|
|
|
if(data->state.referer) {
|
|
outcurl->state.referer = strdup(data->state.referer);
|
|
if(!outcurl->state.referer)
|
|
goto fail;
|
|
outcurl->state.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;
|
|
}
|
|
|
|
#ifdef USE_ALTSVC
|
|
if(data->asi) {
|
|
outcurl->asi = Curl_altsvc_init();
|
|
if(!outcurl->asi)
|
|
goto fail;
|
|
if(outcurl->set.str[STRING_ALTSVC])
|
|
(void)Curl_altsvc_load(outcurl->asi, outcurl->set.str[STRING_ALTSVC]);
|
|
}
|
|
#endif
|
|
#ifndef CURL_DISABLE_HSTS
|
|
if(data->hsts) {
|
|
outcurl->hsts = Curl_hsts_init();
|
|
if(!outcurl->hsts)
|
|
goto fail;
|
|
if(outcurl->set.str[STRING_HSTS])
|
|
(void)Curl_hsts_loadfile(outcurl,
|
|
outcurl->hsts, outcurl->set.str[STRING_HSTS]);
|
|
(void)Curl_hsts_loadcb(outcurl, outcurl->hsts);
|
|
}
|
|
#endif
|
|
/* Clone the resolver handle, if present, for the new handle */
|
|
if(Curl_resolver_duphandle(outcurl,
|
|
&outcurl->state.async.resolver,
|
|
data->state.async.resolver))
|
|
goto fail;
|
|
|
|
#ifdef USE_ARES
|
|
{
|
|
CURLcode rc;
|
|
|
|
rc = Curl_set_dns_servers(outcurl, data->set.str[STRING_DNS_SERVERS]);
|
|
if(rc && rc != CURLE_NOT_BUILT_IN)
|
|
goto fail;
|
|
|
|
rc = Curl_set_dns_interface(outcurl, data->set.str[STRING_DNS_INTERFACE]);
|
|
if(rc && rc != CURLE_NOT_BUILT_IN)
|
|
goto fail;
|
|
|
|
rc = Curl_set_dns_local_ip4(outcurl, data->set.str[STRING_DNS_LOCAL_IP4]);
|
|
if(rc && rc != CURLE_NOT_BUILT_IN)
|
|
goto fail;
|
|
|
|
rc = Curl_set_dns_local_ip6(outcurl, data->set.str[STRING_DNS_LOCAL_IP6]);
|
|
if(rc && rc != CURLE_NOT_BUILT_IN)
|
|
goto fail;
|
|
}
|
|
#endif /* USE_ARES */
|
|
|
|
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->state.cookielist);
|
|
outcurl->state.cookielist = NULL;
|
|
Curl_safefree(outcurl->state.buffer);
|
|
Curl_dyn_free(&outcurl->state.headerb);
|
|
Curl_safefree(outcurl->state.url);
|
|
Curl_safefree(outcurl->state.referer);
|
|
Curl_altsvc_cleanup(&outcurl->asi);
|
|
Curl_hsts_cleanup(&outcurl->hsts);
|
|
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 */
|
|
data->state.retrycount = 0; /* reset the retry counter */
|
|
|
|
/* zero out authentication data: */
|
|
memset(&data->state.authhost, 0, sizeof(struct auth));
|
|
memset(&data->state.authproxy, 0, sizeof(struct auth));
|
|
|
|
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_CRYPTO_AUTH)
|
|
Curl_http_auth_cleanup_digest(data);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
CURLcode result = CURLE_OK;
|
|
int oldstate;
|
|
int newstate;
|
|
|
|
if(!GOOD_EASY_HANDLE(data) || !data->conn)
|
|
/* crazy input, don't continue */
|
|
return CURLE_BAD_FUNCTION_ARGUMENT;
|
|
|
|
k = &data->req;
|
|
oldstate = k->keepon & (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
|
|
|
|
/* first switch off both pause bits then set the new pause bits */
|
|
newstate = (k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE)) |
|
|
((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
|
|
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
|
|
|
|
if((newstate & (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE)) == oldstate) {
|
|
/* Not changing any pause state, return */
|
|
DEBUGF(infof(data, "pause: no change, early return"));
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* Unpause parts in active mime tree. */
|
|
if((k->keepon & ~newstate & KEEP_SEND_PAUSE) &&
|
|
(data->mstate == MSTATE_PERFORMING ||
|
|
data->mstate == MSTATE_RATELIMITING) &&
|
|
data->state.fread_func == (curl_read_callback) Curl_mime_read) {
|
|
Curl_mime_unpause(data->state.in);
|
|
}
|
|
|
|
/* put it back in the keepon */
|
|
k->keepon = newstate;
|
|
|
|
if(!(newstate & KEEP_RECV_PAUSE)) {
|
|
Curl_http2_stream_pause(data, FALSE);
|
|
|
|
if(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 */
|
|
|
|
/* copy the structs to allow for immediate re-pausing */
|
|
for(i = 0; i < data->state.tempcount; i++) {
|
|
writebuf[i] = data->state.tempwrite[i];
|
|
Curl_dyn_init(&data->state.tempwrite[i].b, DYN_PAUSE_BUFFER);
|
|
}
|
|
data->state.tempcount = 0;
|
|
|
|
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(data, writebuf[i].type,
|
|
Curl_dyn_ptr(&writebuf[i].b),
|
|
Curl_dyn_len(&writebuf[i].b));
|
|
Curl_dyn_free(&writebuf[i].b);
|
|
}
|
|
|
|
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((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 */
|
|
|
|
/* reset the too-slow time keeper */
|
|
data->state.keeps_speed.tv_sec = 0;
|
|
|
|
if(!data->state.tempcount)
|
|
/* if not pausing again, force a recv/send check of this connection as
|
|
the data might've been read off the socket already */
|
|
data->conn->cselect_bits = CURL_CSELECT_IN | CURL_CSELECT_OUT;
|
|
if(data->multi) {
|
|
if(Curl_update_timer(data->multi))
|
|
return CURLE_ABORTED_BY_CALLBACK;
|
|
}
|
|
}
|
|
|
|
if(!data->state.done)
|
|
/* This transfer may have been moved in or out of the bundle, update the
|
|
corresponding socket callback, if used */
|
|
result = Curl_updatesocket(data);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static CURLcode easy_connection(struct Curl_easy *data,
|
|
curl_socket_t *sfd,
|
|
struct connectdata **connp)
|
|
{
|
|
if(!data)
|
|
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;
|
|
|
|
if(!data->conn)
|
|
/* on first invoke, the transfer has been detached from the connection and
|
|
needs to be reattached */
|
|
Curl_attach_connnection(data, c);
|
|
|
|
*n = 0;
|
|
result = Curl_read(data, 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;
|
|
SIGPIPE_VARIABLE(pipe_st);
|
|
|
|
if(Curl_is_in_callback(data))
|
|
return CURLE_RECURSIVE_API_CALL;
|
|
|
|
result = easy_connection(data, &sfd, &c);
|
|
if(result)
|
|
return result;
|
|
|
|
if(!data->conn)
|
|
/* on first invoke, the transfer has been detached from the connection and
|
|
needs to be reattached */
|
|
Curl_attach_connnection(data, c);
|
|
|
|
*n = 0;
|
|
sigpipe_ignore(data, &pipe_st);
|
|
result = Curl_write(data, sfd, buffer, buflen, &n1);
|
|
sigpipe_restore(&pipe_st);
|
|
|
|
if(n1 == -1)
|
|
return CURLE_SEND_ERROR;
|
|
|
|
/* detect EAGAIN */
|
|
if(!result && !n1)
|
|
return CURLE_AGAIN;
|
|
|
|
*n = (size_t)n1;
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Wrapper to call functions in Curl_conncache_foreach()
|
|
*
|
|
* Returns always 0.
|
|
*/
|
|
static int conn_upkeep(struct Curl_easy *data,
|
|
struct connectdata *conn,
|
|
void *param)
|
|
{
|
|
/* Param is unused. */
|
|
(void)param;
|
|
|
|
if(conn->handler->connection_check) {
|
|
/* briefly attach the connection to this transfer for the purpose of
|
|
checking it */
|
|
Curl_attach_connnection(data, conn);
|
|
|
|
/* Do a protocol-specific keepalive check on the connection. */
|
|
conn->handler->connection_check(data, conn, CONNCHECK_KEEPALIVE);
|
|
/* detach the connection again */
|
|
Curl_detach_connnection(data);
|
|
}
|
|
|
|
return 0; /* continue iteration */
|
|
}
|
|
|
|
static CURLcode upkeep(struct conncache *conn_cache, void *data)
|
|
{
|
|
/* Loop over every connection and make connection alive. */
|
|
Curl_conncache_foreach(data,
|
|
conn_cache,
|
|
data,
|
|
conn_upkeep);
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* 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 upkeep(&data->multi_easy->conn_cache, data);
|
|
}
|
|
else {
|
|
/* No connections, so just return success */
|
|
return CURLE_OK;
|
|
}
|
|
}
|