Zabbix

/*

** Copyright (C) 2001-2024 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 "discoverer_async.h"

​

#include "discoverer_job.h"

#include "async_tcpsvc.h"

#include "async_telnet.h"

​

#ifdef HAVE_LIBCURL

#   include "async_http.h"

#endif

​

#include "zbxsysinfo.h"

#include "zbx_discoverer_constants.h"

#include "zbxasyncpoller.h"

#include "zbxpoller.h"

​

#ifdef HAVE_LIBCURL

#   include "zbxasynchttppoller.h"

#endif

​

#include "zbxcacheconfig.h"

#include "zbxcomms.h"

#include "zbxdbhigh.h"

#include "zbxip.h"

#include "zbxstr.h"

​

#ifndef EVDNS_BASE_INITIALIZE_NAMESERVERS

#   define EVDNS_BASE_INITIALIZE_NAMESERVERS    1

#endif

​

static ZBX_THREAD_LOCAL int log_worker_id;

​

static int  discovery_async_poller_dns_init(discovery_poller_config_t *poller_config)

{

    char    *timeout;

​

    if (NULL == (poller_config->dnsbase = evdns_base_new(poller_config->base, EVDNS_BASE_INITIALIZE_NAMESERVERS)))

    {

        int ret;

​

        zabbix_log(LOG_LEVEL_ERR, "cannot initialize asynchronous DNS library with resolv.conf");

​

        if (NULL == (poller_config->dnsbase = evdns_base_new(poller_config->base, 0)))

        {

            zabbix_log(LOG_LEVEL_ERR, "cannot initialize asynchronous DNS library");

            return FAIL;

        }

​

        if (0 != (ret = evdns_base_resolv_conf_parse(poller_config->dnsbase, DNS_OPTIONS_ALL,

                ZBX_RES_CONF_FILE)))

        {

            zabbix_log(LOG_LEVEL_ERR, "cannot parse resolv.conf result: %s", zbx_resolv_conf_errstr(ret));

        }

    }

​

    timeout = zbx_dsprintf(NULL, "%d", poller_config->config_timeout);

​

    if (0 != evdns_base_set_option(poller_config->dnsbase, "timeout:", timeout))

    {

        zabbix_log(LOG_LEVEL_ERR, "cannot set timeout to asynchronous DNS library");

        evdns_base_free(poller_config->dnsbase, 1);

        zbx_free(timeout);

        return FAIL;

    }

​

    zbx_free(timeout);

​

    return SUCCEED;

}

​

static void discovery_async_poller_destroy(discovery_poller_config_t *poller_config)

{

    zabbix_log(LOG_LEVEL_DEBUG, "[%d] In %s()", log_worker_id, __func__);

​

    evdns_base_free(poller_config->dnsbase, 1);

    event_base_free(poller_config->base);

​

    zabbix_log(LOG_LEVEL_DEBUG, "[%d] End of %s()", log_worker_id, __func__);