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 "zbxalgo.h"

#include "zbxasyncpoller.h"

#include "zbxcommon.h"

#include "zbxcomms.h"

#include "zbxtime.h"

​

#ifdef HAVE_LIBEVENT

#include "zbxip.h"

#include <event2/dns.h>

#include <event2/event.h>

#include <event2/util.h>

​

ZBX_VECTOR_IMPL(address, zbx_address_t)

​

typedef struct

{

    void                    *data;

    zbx_async_task_process_task_cb_t    async_task_process_task_cb;

    zbx_async_task_process_result_cb_t  async_task_process_result_cb;

    struct event                *tx_event;

    struct event                *rx_event;

    struct event                *timeout_event;

    int                 timeout;

    char                    *error;

    struct evdns_base           *dnsbase;

    struct evutil_addrinfo          *ai;

    zbx_vector_address_t            addresses;

    char                    *reverse_dns;

}

zbx_async_task_t;

​

static void async_reverse_dns_event(int err, char type, int count, int ttl, void *addresses, void *arg);

​

static void async_task_process_result_and_remove(zbx_async_task_t *task)

{

    task->async_task_process_result_cb(task->data);

​

    if (NULL != task->rx_event)

        event_free(task->rx_event);

​

    if (NULL != task->tx_event)

        event_free(task->tx_event);

​

    if (NULL != task->timeout_event)

        event_free(task->timeout_event);

​

    if (NULL != task->ai)

        evutil_freeaddrinfo(task->ai);

​