Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

** See the GNU Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "zbxcommon.h"

​

#ifdef HAVE_LIBCURL

​

#include "zbxcurl.h"

​

/* See https://curl.se/libcurl/c/symbols-by-name.html for information in which version a symbol was added. */

​

/* added in 7.85.0 (0x075500) */

#if LIBCURL_VERSION_NUM < 0x075500

#   define CURLOPT_PROTOCOLS_STR    10318L

#endif

​

static unsigned int libcurl_version_num(void)

{

    return curl_version_info(CURLVERSION_NOW)->version_num;

}

​

static const char   *libcurl_version_str(void)

{

    return curl_version_info(CURLVERSION_NOW)->version;

}

​

static const char   *libcurl_ssl_version(void)

{

    return curl_version_info(CURLVERSION_NOW)->ssl_version;

}

​

/* curl_multi_wait() was added in cURL 7.28.0 (0x071c00). Since we support cURL library >= 7.19.1  */

/* we want to be able to compile against older cURL library. This is a wrapper that detects if the */

/* function is available at runtime. It should never be called for older library versions because  */

/* detect the version before. When cURL library requirement goes to >= 7.28.0 this function and    */

/* the structure declaration should be removed and curl_multi_wait() be used directly.             */

CURLMcode   zbx_curl_multi_wait(CURLM *multi_handle, int timeout_ms, int *numfds)

{

#if LIBCURL_VERSION_NUM < 0x071c00

    struct curl_waitfd

    {

        curl_socket_t   fd;

        short       events;

        short       revents;

    };

#endif

    static void     *handle;

    static CURLMcode    (*fptr)(CURLM *, struct curl_waitfd *, unsigned int, int, int *) = NULL;

​

    if (NULL == fptr)

    {

        /* this check must be performed before calling this function */