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curl/lib/easy.c
Daniel Stenberg 371a25eee9 When curl_easy_duphandle() fails because it can't get or make a connection 
cache, we must make sure not to derefence the NULL pointer...
CID 6 coverity.com scan
2007-03-31 11:28:03 +00:00

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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
#include "setup.h"
/* -- WIN32 approved -- */
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include "strequal.h"
#ifdef WIN32
#include <time.h>
#include <io.h>
#else
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include <netinet/in.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <netdb.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#include <sys/ioctl.h>
#include <signal.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#endif /* WIN32 ... */
#include "urldata.h"
#include <curl/curl.h>
#include "transfer.h"
#include "sslgen.h"
#include "url.h"
#include "getinfo.h"
#include "hostip.h"
#include "share.h"
#include "strdup.h"
#include "memory.h"
#include "progress.h"
#include "easyif.h"
#include "select.h"
#include "sendf.h" /* for failf function prototype */
#include <ca-bundle.h>
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
#include <iconv.h>
/* set default codesets for iconv */
#ifndef CURL_ICONV_CODESET_OF_NETWORK
#define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
#endif
#ifndef CURL_ICONV_CODESET_FOR_UTF8
#define CURL_ICONV_CODESET_FOR_UTF8 "UTF-8"
#endif
#define ICONV_ERROR (size_t)-1
#endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */
/* The last #include file should be: */
#include "memdebug.h"
#ifdef USE_WINSOCK
/* win32_cleanup() is for win32 socket cleanup functionality, the opposite
of win32_init() */
static void win32_cleanup(void)
{
WSACleanup();
}
/* win32_init() performs win32 socket initialization to properly setup the
stack to allow networking */
static CURLcode win32_init(void)
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
#if defined(ENABLE_IPV6) && (USE_WINSOCK < 2)
Error IPV6_requires_winsock2
#endif
wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0)
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
return CURLE_FAILED_INIT;
/* Confirm that the Windows Sockets DLL supports what we need.*/
/* Note that if the DLL supports versions greater */
/* than wVersionRequested, it will still return */
/* wVersionRequested in wVersion. wHighVersion contains the */
/* highest supported version. */
if ( LOBYTE( wsaData.wVersion ) != LOBYTE(wVersionRequested) ||
HIBYTE( wsaData.wVersion ) != HIBYTE(wVersionRequested) ) {
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
WSACleanup();
return CURLE_FAILED_INIT;
}
/* The Windows Sockets DLL is acceptable. Proceed. */
return CURLE_OK;
}
#else
/* These functions exist merely to prevent compiler warnings */
static CURLcode win32_init(void) { return CURLE_OK; }
static void win32_cleanup(void) { }
#endif
#ifdef USE_LIBIDN
/*
* Initialise use of IDNA library.
* It falls back to ASCII if $CHARSET isn't defined. This doesn't work for
* idna_to_ascii_lz().
*/
static void idna_init (void)
{
#ifdef WIN32
char buf[60];
UINT cp = GetACP();
if (!getenv("CHARSET") && cp > 0) {
snprintf(buf, sizeof(buf), "CHARSET=cp%u", cp);
putenv(buf);
}
#else
/* to do? */
#endif
}
#endif /* USE_LIBIDN */
/* true globals -- for curl_global_init() and curl_global_cleanup() */
static unsigned int initialized;
static long init_flags;
/*
* strdup (and other memory functions) is redefined in complicated
* ways, but at this point it must be defined as the system-supplied strdup
* so the callback pointer is initialized correctly.
*/
#if defined(_WIN32_WCE)
#define system_strdup _strdup
#elif !defined(HAVE_STRDUP)
#define system_strdup curlx_strdup
#else
#define system_strdup strdup
#endif
/*
* If a memory-using function (like curl_getenv) is used before
* curl_global_init() is called, we need to have these pointers set already.
*/
curl_malloc_callback Curl_cmalloc = (curl_malloc_callback)malloc;
curl_free_callback Curl_cfree = (curl_free_callback)free;
curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)system_strdup;
curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;
/**
* curl_global_init() globally initializes cURL given a bitwise set of the
* different features of what to initialize.
*/
CURLcode curl_global_init(long flags)
{
if (initialized++)
return CURLE_OK;
/* Setup the default memory functions here (again) */
Curl_cmalloc = (curl_malloc_callback)malloc;
Curl_cfree = (curl_free_callback)free;
Curl_crealloc = (curl_realloc_callback)realloc;
Curl_cstrdup = (curl_strdup_callback)system_strdup;
Curl_ccalloc = (curl_calloc_callback)calloc;
if (flags & CURL_GLOBAL_SSL)
if (!Curl_ssl_init()) {
DEBUGF(fprintf(stderr, "Error: Curl_ssl_init failed\n"));
return CURLE_FAILED_INIT;
}
if (flags & CURL_GLOBAL_WIN32)
if (win32_init() != CURLE_OK) {
DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
return CURLE_FAILED_INIT;
}
#ifdef __AMIGA__
if(!amiga_init()) {
DEBUGF(fprintf(stderr, "Error: amiga_init failed\n"));
return CURLE_FAILED_INIT;
}
#endif
#ifdef USE_LIBIDN
idna_init();
#endif
init_flags = flags;
return CURLE_OK;
}
/*
* curl_global_init_mem() globally initializes cURL and also registers the
* user provided callback routines.
*/
CURLcode curl_global_init_mem(long flags, curl_malloc_callback m,
curl_free_callback f, curl_realloc_callback r,
curl_strdup_callback s, curl_calloc_callback c)
{
CURLcode code = CURLE_OK;
/* Invalid input, return immediately */
if (!m || !f || !r || !s || !c)
return CURLE_FAILED_INIT;
/* Already initialized, don't do it again */
if ( initialized )
return CURLE_OK;
/* Call the actual init function first */
code = curl_global_init(flags);
if (code == CURLE_OK) {
Curl_cmalloc = m;
Curl_cfree = f;
Curl_cstrdup = s;
Curl_crealloc = r;
Curl_ccalloc = c;
}
return code;
}
/**
* curl_global_cleanup() globally cleanups cURL, uses the value of
* "init_flags" to determine what needs to be cleaned up and what doesn't.
*/
void curl_global_cleanup(void)
{
if (!initialized)
return;
if (--initialized)
return;
Curl_global_host_cache_dtor();
if (init_flags & CURL_GLOBAL_SSL)
Curl_ssl_cleanup();
if (init_flags & CURL_GLOBAL_WIN32)
win32_cleanup();
#ifdef __AMIGA__
amiga_cleanup();
#endif
init_flags = 0;
}
/*
* curl_easy_init() is the external interface to alloc, setup and init an
* easy handle that is returned. If anything goes wrong, NULL is returned.
*/
CURL *curl_easy_init(void)
{
CURLcode res;
struct SessionHandle *data;
/* Make sure we inited the global SSL stuff */
if (!initialized) {
res = curl_global_init(CURL_GLOBAL_DEFAULT);
if(res) {
/* something in the global init failed, return nothing */
DEBUGF(fprintf(stderr, "Error: curl_global_init failed\n"));
return NULL;
}
}
/* We use curl_open() with undefined URL so far */
res = Curl_open(&data);
if(res != CURLE_OK) {
DEBUGF(fprintf(stderr, "Error: Curl_open failed\n"));
return NULL;
}
return data;
}
/*
* curl_easy_setopt() is the external interface for setting options on an
* easy handle.
*/
CURLcode curl_easy_setopt(CURL *curl, CURLoption tag, ...)
{
va_list arg;
struct SessionHandle *data = curl;
CURLcode ret;
if(!curl)
return CURLE_BAD_FUNCTION_ARGUMENT;
va_start(arg, tag);
ret = Curl_setopt(data, tag, arg);
va_end(arg);
return ret;
}
#ifdef CURL_MULTIEASY
/***************************************************************************
* This function is still only for testing purposes. It makes a great way
* to run the full test suite on the multi interface instead of the easy one.
***************************************************************************
*
* The *new* curl_easy_perform() is the external interface that performs a
* transfer previously setup.
*
* Wrapper-function that: 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. This will make everything internally use and assume multi interface.
*/
CURLcode curl_easy_perform(CURL *easy)
{
CURLM *multi;
CURLMcode mcode;
CURLcode code = CURLE_OK;
int still_running;
struct timeval timeout;
int rc;
CURLMsg *msg;
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd;
if(!easy)
return CURLE_BAD_FUNCTION_ARGUMENT;
multi = curl_multi_init();
if(!multi)
return CURLE_OUT_OF_MEMORY;
mcode = curl_multi_add_handle(multi, easy);
if(mcode) {
curl_multi_cleanup(multi);
return CURLE_FAILED_INIT;
}
/* we start some action by calling perform right away */
do {
while(CURLM_CALL_MULTI_PERFORM ==
curl_multi_perform(multi, &still_running));
if(!still_running)
break;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
/* timeout once per second */
timeout.tv_sec = 1;
timeout.tv_usec = 0;
/* get file descriptors from the transfers */
curl_multi_fdset(multi, &fdread, &fdwrite, &fdexcep, &maxfd);
rc = Curl_select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
if(rc == -1)
/* select error */
break;
/* timeout or data to send/receive => loop! */
} while(still_running);
msg = curl_multi_info_read(multi, &rc);
if(msg)
code = msg->data.result;
mcode = curl_multi_remove_handle(multi, easy);
/* what to do if it fails? */
mcode = curl_multi_cleanup(multi);
/* what to do if it fails? */
return code;
}
#else
/*
* curl_easy_perform() is the external interface that performs a transfer
* previously setup.
*/
CURLcode curl_easy_perform(CURL *curl)
{
struct SessionHandle *data = (struct SessionHandle *)curl;
if(!data)
return CURLE_BAD_FUNCTION_ARGUMENT;
if ( ! (data->share && data->share->hostcache) ) {
if (Curl_global_host_cache_use(data) &&
(data->dns.hostcachetype != HCACHE_GLOBAL)) {
if (data->dns.hostcachetype == HCACHE_PRIVATE)
Curl_hash_destroy(data->dns.hostcache);
data->dns.hostcache = Curl_global_host_cache_get();
data->dns.hostcachetype = HCACHE_GLOBAL;
}
if (!data->dns.hostcache) {
data->dns.hostcachetype = HCACHE_PRIVATE;
data->dns.hostcache = Curl_mk_dnscache();
if(!data->dns.hostcache)
/* While we possibly could survive and do good without a host cache,
the fact that creating it failed indicates that things are truly
screwed up and we should bail out! */
return CURLE_OUT_OF_MEMORY;
}
}
if(!data->state.connc) {
/* oops, no connection cache, make one up */
data->state.connc = Curl_mk_connc(CONNCACHE_PRIVATE, -1);
if(!data->state.connc)
return CURLE_OUT_OF_MEMORY;
}
return Curl_perform(data);
}
#endif
/*
* curl_easy_cleanup() is the external interface to cleaning/freeing the given
* easy handle.
*/
void curl_easy_cleanup(CURL *curl)
{
struct SessionHandle *data = (struct SessionHandle *)curl;
if(!data)
return;
Curl_close(data);
}
/*
* Store a pointed to the multi handle within the easy handle's data struct.
*/
void Curl_easy_addmulti(struct SessionHandle *data,
void *multi)
{
data->multi = multi;
}
void Curl_easy_initHandleData(struct SessionHandle *data)
{
memset(&data->reqdata, 0, sizeof(struct HandleData));
data->reqdata.maxdownload = -1;
}
/*
* curl_easy_getinfo() is an external interface that allows an app to retrieve
* information from a performed transfer and similar.
*/
CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ...)
{
va_list arg;
void *paramp;
struct SessionHandle *data = (struct SessionHandle *)curl;
va_start(arg, info);
paramp = va_arg(arg, void *);
return Curl_getinfo(data, info, paramp);
}
/*
* 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.
*/
CURL *curl_easy_duphandle(CURL *incurl)
{
bool fail = TRUE;
struct SessionHandle *data=(struct SessionHandle *)incurl;
struct SessionHandle *outcurl = (struct SessionHandle *)
calloc(sizeof(struct SessionHandle), 1);
if(NULL == outcurl)
return NULL; /* failure */
do {
/*
* 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->state.headerbuff=(char*)malloc(HEADERSIZE);
if(!outcurl->state.headerbuff) {
break;
}
outcurl->state.headersize=HEADERSIZE;
/* copy all userdefined values */
outcurl->set = data->set;
if(data->state.used_interface == Curl_if_multi)
outcurl->state.connc = data->state.connc;
else
outcurl->state.connc = Curl_mk_connc(CONNCACHE_PRIVATE, -1);
if(!outcurl->state.connc)
break;
outcurl->state.lastconnect = -1;
outcurl->progress.flags = data->progress.flags;
outcurl->progress.callback = data->progress.callback;
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
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) {
break;
}
}
#endif /* CURL_DISABLE_HTTP */
/* duplicate all values in 'change' */
if(data->change.url) {
outcurl->change.url = strdup(data->change.url);
if(!outcurl->change.url)
break;
outcurl->change.url_alloc = TRUE;
}
if(data->change.referer) {
outcurl->change.referer = strdup(data->change.referer);
if(!outcurl->change.referer)
break;
outcurl->change.referer_alloc = TRUE;
}
#ifdef USE_ARES
/* If we use ares, we setup a new ares channel for the new handle */
if(ARES_SUCCESS != ares_init(&outcurl->state.areschannel))
break;
#endif
#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
outcurl->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_OF_NETWORK);
outcurl->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
CURL_ICONV_CODESET_OF_HOST);
outcurl->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_FOR_UTF8);
#endif
Curl_easy_initHandleData(outcurl);
outcurl->magic = CURLEASY_MAGIC_NUMBER;
fail = FALSE; /* we reach this point and thus we are OK */
} while(0);
if(fail) {
if(outcurl) {
if((outcurl->state.connc->type == CONNCACHE_PRIVATE) &&
outcurl->state.connc)
Curl_rm_connc(outcurl->state.connc);
if(outcurl->state.headerbuff)
free(outcurl->state.headerbuff);
if(outcurl->change.url)
free(outcurl->change.url);
if(outcurl->change.referer)
free(outcurl->change.referer);
free(outcurl); /* free the memory again */
outcurl = NULL;
}
}
return outcurl;
}
/*
* 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(CURL *curl)
{
struct SessionHandle *data = (struct SessionHandle *)curl;
Curl_safefree(data->reqdata.pathbuffer);
data->reqdata.pathbuffer=NULL;
Curl_safefree(data->reqdata.proto.generic);
data->reqdata.proto.generic=NULL;
/* zero out UserDefined data: */
memset(&data->set, 0, sizeof(struct UserDefined));
/* zero out Progress data: */
memset(&data->progress, 0, sizeof(struct Progress));
/* init Handle data */
Curl_easy_initHandleData(data);
/* The remainder of these calls have been taken from Curl_open() */
data->set.out = stdout; /* default output to stdout */
data->set.in = stdin; /* default input from stdin */
data->set.err = stderr; /* default stderr to stderr */
/* use fwrite as default function to store output */
data->set.fwrite = (curl_write_callback)fwrite;
/* use fread as default function to read input */
data->set.fread = (curl_read_callback)fread;
data->set.infilesize = -1; /* we don't know any size */
data->set.postfieldsize = -1;
data->state.current_speed = -1; /* init to negative == impossible */
data->set.httpreq = HTTPREQ_GET; /* Default HTTP request */
data->set.ftp_use_epsv = TRUE; /* FTP defaults to EPSV operations */
data->set.ftp_use_eprt = TRUE; /* FTP defaults to EPRT operations */
data->set.dns_cache_timeout = 60; /* Timeout every 60 seconds by default */
/* make libcurl quiet by default: */
data->set.hide_progress = TRUE; /* CURLOPT_NOPROGRESS changes these */
data->progress.flags |= PGRS_HIDE;
/* Set the default size of the SSL session ID cache */
data->set.ssl.numsessions = 5;
data->set.proxyport = 1080;
data->set.proxytype = CURLPROXY_HTTP; /* defaults to HTTP proxy */
data->set.httpauth = CURLAUTH_BASIC; /* defaults to basic */
data->set.proxyauth = CURLAUTH_BASIC; /* defaults to basic */
/*
* libcurl 7.10 introduced SSL verification *by default*! This needs to be
* switched off unless wanted.
*/
data->set.ssl.verifypeer = TRUE;
data->set.ssl.verifyhost = 2;
#ifdef CURL_CA_BUNDLE
/* This is our prefered CA cert bundle since install time */
data->set.ssl.CAfile = (char *)CURL_CA_BUNDLE;
#endif
data->set.ssh_auth_types = CURLSSH_AUTH_DEFAULT; /* defaults to any auth
type */
}
#ifdef CURL_DOES_CONVERSIONS
/*
* Curl_convert_to_network() is an internal function
* for performing ASCII conversions on non-ASCII platforms.
*/
CURLcode Curl_convert_to_network(struct SessionHandle *data,
char *buffer, size_t length)
{
CURLcode rc;
if(data->set.convtonetwork) {
/* use translation callback */
rc = data->set.convtonetwork(buffer, length);
if(rc != CURLE_OK) {
failf(data,
"CURLOPT_CONV_TO_NETWORK_FUNCTION callback returned %i: %s",
rc, curl_easy_strerror(rc));
}
return(rc);
} else {
#ifdef HAVE_ICONV
/* do the translation ourselves */
char *input_ptr, *output_ptr;
size_t in_bytes, out_bytes, rc;
int error;
/* open an iconv conversion descriptor if necessary */
if(data->outbound_cd == (iconv_t)-1) {
data->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
CURL_ICONV_CODESET_OF_HOST);
if(data->outbound_cd == (iconv_t)-1) {
error = ERRNO;
failf(data,
"The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
CURL_ICONV_CODESET_OF_NETWORK,
CURL_ICONV_CODESET_OF_HOST,
error, strerror(error));
return CURLE_CONV_FAILED;
}
}
/* call iconv */
input_ptr = output_ptr = buffer;
in_bytes = out_bytes = length;
rc = iconv(data->outbound_cd, (const char**)&input_ptr, &in_bytes,
&output_ptr, &out_bytes);
if ((rc == ICONV_ERROR) || (in_bytes != 0)) {
error = ERRNO;
failf(data,
"The Curl_convert_to_network iconv call failed with errno %i: %s",
error, strerror(error));
return CURLE_CONV_FAILED;
}
#else
failf(data, "CURLOPT_CONV_TO_NETWORK_FUNCTION callback required");
return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
}
return CURLE_OK;
}
/*
* Curl_convert_from_network() is an internal function
* for performing ASCII conversions on non-ASCII platforms.
*/
CURLcode Curl_convert_from_network(struct SessionHandle *data,
char *buffer, size_t length)
{
CURLcode rc;
if(data->set.convfromnetwork) {
/* use translation callback */
rc = data->set.convfromnetwork(buffer, length);
if(rc != CURLE_OK) {
failf(data,
"CURLOPT_CONV_FROM_NETWORK_FUNCTION callback returned %i: %s",
rc, curl_easy_strerror(rc));
}
return(rc);
} else {
#ifdef HAVE_ICONV
/* do the translation ourselves */
char *input_ptr, *output_ptr;
size_t in_bytes, out_bytes, rc;
int error;
/* open an iconv conversion descriptor if necessary */
if(data->inbound_cd == (iconv_t)-1) {
data->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_OF_NETWORK);
if(data->inbound_cd == (iconv_t)-1) {
error = ERRNO;
failf(data,
"The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_OF_NETWORK,
error, strerror(error));
return CURLE_CONV_FAILED;
}
}
/* call iconv */
input_ptr = output_ptr = buffer;
in_bytes = out_bytes = length;
rc = iconv(data->inbound_cd, (const char **)&input_ptr, &in_bytes,
&output_ptr, &out_bytes);
if ((rc == ICONV_ERROR) || (in_bytes != 0)) {
error = ERRNO;
failf(data,
"The Curl_convert_from_network iconv call failed with errno %i: %s",
error, strerror(error));
return CURLE_CONV_FAILED;
}
#else
failf(data, "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback required");
return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
}
return CURLE_OK;
}
/*
* Curl_convert_from_utf8() is an internal function
* for performing UTF-8 conversions on non-ASCII platforms.
*/
CURLcode Curl_convert_from_utf8(struct SessionHandle *data,
char *buffer, size_t length)
{
CURLcode rc;
if(data->set.convfromutf8) {
/* use translation callback */
rc = data->set.convfromutf8(buffer, length);
if(rc != CURLE_OK) {
failf(data,
"CURLOPT_CONV_FROM_UTF8_FUNCTION callback returned %i: %s",
rc, curl_easy_strerror(rc));
}
return(rc);
} else {
#ifdef HAVE_ICONV
/* do the translation ourselves */
char *input_ptr, *output_ptr;
size_t in_bytes, out_bytes, rc;
int error;
/* open an iconv conversion descriptor if necessary */
if(data->utf8_cd == (iconv_t)-1) {
data->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_FOR_UTF8);
if(data->utf8_cd == (iconv_t)-1) {
error = ERRNO;
failf(data,
"The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_FOR_UTF8,
error, strerror(error));
return CURLE_CONV_FAILED;
}
}
/* call iconv */
input_ptr = output_ptr = buffer;
in_bytes = out_bytes = length;
rc = iconv(data->utf8_cd, (const char**)&input_ptr, &in_bytes,
&output_ptr, &out_bytes);
if ((rc == ICONV_ERROR) || (in_bytes != 0)) {
error = ERRNO;
failf(data,
"The Curl_convert_from_utf8 iconv call failed with errno %i: %s",
error, strerror(error));
return CURLE_CONV_FAILED;
}
if (output_ptr < input_ptr) {
/* null terminate the now shorter output string */
*output_ptr = 0x00;
}
#else
failf(data, "CURLOPT_CONV_FROM_UTF8_FUNCTION callback required");
return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
}
return CURLE_OK;
}
#endif /* CURL_DOES_CONVERSIONS */
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