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 "checks_snmp.h"

​

#ifdef HAVE_NETSNMP

​

#define SNMP_NO_DEBUGGING

​

#include "zbxasyncpoller.h"

#include "async_poller.h"

#include "zbxpoller.h"

​

#include "zbxtimekeeper.h"

#include "zbxcacheconfig.h"

#include "zbxip.h"

#include "zbxcomms.h"

#include "zbxalgo.h"

#include "zbxjson.h"

#include "zbxparam.h"

#include "zbxsysinfo.h"

#include "zbxdbhigh.h"

#include "zbxexpr.h"

#include "zbxstr.h"

​

#include <event2/event.h>

#include <event2/util.h>

#include <event2/dns.h>

#include <net-snmp/net-snmp-config.h>

#include <net-snmp/net-snmp-includes.h>

#include <net-snmp/library/large_fd_set.h>

#include "zbxself.h"

​

#ifndef EVDNS_BASE_INITIALIZE_NAMESERVERS

#   define EVDNS_BASE_INITIALIZE_NAMESERVERS    1

#endif

​

/*

 * SNMP Dynamic Index Cache

 * ========================

 *

 * Description

 * -----------

 *

 * Zabbix caches the whole index table for the particular OID separately based on:

 *   * IP address;

 *   * port;

 *   * community string (SNMPv2c);

 *   * context, security name (SNMPv3).

 *

 * Zabbix revalidates each index before using it to get a value and rebuilds the index cache for the OID if the

 * index is invalid.