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/*
** Zabbix
** Copyright (C) 2001-2018 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#include "daemon.h"
#include "log.h"
#include "zbxjson.h"
#include "zbxself.h"
#include "heart.h"
#include "../servercomms.h"
#include "../../libs/zbxcrypto/tls.h"
extern unsigned char process_type, program_type;
extern int server_num, process_num;
/******************************************************************************
* *
* Function: send_heartbeat *
* *
******************************************************************************/
static int send_heartbeat(void)
{
zbx_socket_t sock;
struct zbx_json j;
int ret = SUCCEED;
char *error = NULL;
zabbix_log(LOG_LEVEL_DEBUG, "In send_heartbeat()");
zbx_json_init(&j, 128);
zbx_json_addstring(&j, "request", ZBX_PROTO_VALUE_PROXY_HEARTBEAT, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, "host", CONFIG_HOSTNAME, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, ZBX_PROTO_TAG_VERSION, ZABBIX_VERSION, ZBX_JSON_TYPE_STRING);
if (FAIL == connect_to_server(&sock, CONFIG_HEARTBEAT_FREQUENCY, 0)) /* do not retry */
return FAIL;
if (SUCCEED != put_data_to_server(&sock, &j, &error))
{
zabbix_log(LOG_LEVEL_WARNING, "cannot send heartbeat message to server at \"%s\": %s",
sock.peer, error);
ret = FAIL;
}
zbx_free(error);
disconnect_server(&sock);
return ret;
}
/******************************************************************************
* *
* Function: main_heart_loop *
* *
* Purpose: periodically send heartbeat message to the server *
* *
******************************************************************************/
ZBX_THREAD_ENTRY(heart_thread, args)
{
int start, sleeptime = 0, res;
double sec, total_sec = 0.0, old_total_sec = 0.0;
time_t last_stat_time;
#define STAT_INTERVAL 5 /* if a process is busy and does not sleep then update status not faster than */
/* once in STAT_INTERVAL seconds */
process_type = ((zbx_thread_args_t *)args)->process_type;
server_num = ((zbx_thread_args_t *)args)->server_num;
process_num = ((zbx_thread_args_t *)args)->process_num;
zabbix_log(LOG_LEVEL_INFORMATION, "%s #%d started [%s #%d]", get_program_type_string(program_type),
server_num, get_process_type_string(process_type), process_num);
#if defined(HAVE_POLARSSL) || defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL)
zbx_tls_init_child();
#endif
last_stat_time = time(NULL);
zbx_setproctitle("%s [sending heartbeat message]", get_process_type_string(process_type));
for (;;)
{
sec = zbx_time();
zbx_update_env(sec);
if (0 != sleeptime)
{
zbx_setproctitle("%s [sending heartbeat message %s in " ZBX_FS_DBL " sec, "
"sending heartbeat message]",
get_process_type_string(process_type),
SUCCEED == res ? "success" : "failed", old_total_sec);
}
start = time(NULL);
res = send_heartbeat();
total_sec += zbx_time() - sec;
sleeptime = CONFIG_HEARTBEAT_FREQUENCY - (time(NULL) - start);
if (0 != sleeptime || STAT_INTERVAL <= time(NULL) - last_stat_time)
{
if (0 == sleeptime)
{
zbx_setproctitle("%s [sending heartbeat message %s in " ZBX_FS_DBL " sec, "
"sending heartbeat message]",
get_process_type_string(process_type),
SUCCEED == res ? "success" : "failed", total_sec);
}
else
{
zbx_setproctitle("%s [sending heartbeat message %s in " ZBX_FS_DBL " sec, "
"idle %d sec]",
get_process_type_string(process_type),
SUCCEED == res ? "success" : "failed", total_sec, sleeptime);
old_total_sec = total_sec;
}
total_sec = 0.0;
last_stat_time = time(NULL);
}
zbx_sleep_loop(sleeptime);
}
#undef STAT_INTERVAL
}
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