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/*
** ZABBIX
** Copyright (C) 2000-2005 SIA Zabbix
**
** 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., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
#include "common.h"
#include "cfg.h"
#include "db.h"
#include "log.h"
#include "zlog.h"
#include "sysinfo.h"
#include "zbxserver.h"
#include "zbxicmpping.h"
#include "pinger.h"
#include "dbcache.h"
static zbx_process_t zbx_process;
static int pinger_num;
static ZBX_FPING_HOST *hosts = NULL;
static int hosts_allocated = 4;
/******************************************************************************
* *
* Function: process_value *
* *
* Purpose: process new item value *
* *
* Parameters: key - item key *
* host - host name *
* value - new value of the item *
* *
* Return value: SUCCEED - new value sucesfully processed *
* FAIL - otherwise *
* *
* Author: Alexei Vladishev *
* *
* Comments: can be done in process_data() *
* *
******************************************************************************/
static void process_value(char *key, ZBX_FPING_HOST *host, zbx_uint64_t *value_ui64, double *value_dbl, int now, int *items, int ping_result, const char *error)
{
DB_RESULT result;
DB_ROW row;
DB_ITEM item;
AGENT_RESULT value;
char istatus[16];
assert(value_ui64 || value_dbl);
zabbix_log(LOG_LEVEL_DEBUG, "In process_value(%s@%s)",
key,
host->addr);
if (0 != CONFIG_REFRESH_UNSUPPORTED)
zbx_snprintf(istatus, sizeof(istatus), "%d,%d",
ITEM_STATUS_ACTIVE,
ITEM_STATUS_NOTSUPPORTED);
else
zbx_snprintf(istatus, sizeof(istatus), "%d",
ITEM_STATUS_ACTIVE);
result = DBselect("select %s where " ZBX_SQL_MOD(h.hostid,%d) "=%d and h.status=%d and h.hostid=i.hostid"
" and h.proxy_hostid=0 and h.useip=%d and h.%s='%s' and i.key_='%s' and i.status in (%s)"
" and i.type=%d and i.nextcheck<=%d" DB_NODE,
ZBX_SQL_ITEM_SELECT,
CONFIG_PINGER_FORKS,
pinger_num - 1,
HOST_STATUS_MONITORED,
host->useip,
host->useip ? "ip" : "dns",
host->addr,
key,
istatus,
ITEM_TYPE_SIMPLE,
now,
DBnode_local("h.hostid"));
while (NULL != (row = DBfetch(result))) {
DBget_item_from_db(&item, row);
if (ping_result == NOTSUPPORTED)
{
if (0 == CONFIG_DBSYNCER_FORKS)
{
DBbegin();
DBupdate_item_status_to_notsupported(&item, now, error);
DBcommit();
}
else
DCadd_nextcheck(&item, now, 0, error);
}
else
{
init_result(&value);
if (NULL != value_ui64)
{
SET_UI64_RESULT(&value, *value_ui64);
}
else
{
SET_DBL_RESULT(&value, *value_dbl);
}
if (0 == CONFIG_DBSYNCER_FORKS)
{
DBbegin();
switch (zbx_process) {
case ZBX_PROCESS_SERVER:
process_new_value(&item, &value, now);
update_triggers(item.itemid);
break;
case ZBX_PROCESS_PROXY:
proxy_process_new_value(&item, &value, now);
break;
}
DBcommit();
}
else
{
switch (zbx_process) {
case ZBX_PROCESS_SERVER:
process_new_value(&item, &value, now);
break;
case ZBX_PROCESS_PROXY:
proxy_process_new_value(&item, &value, now);
break;
}
DCadd_nextcheck(&item, now, 0, NULL);
}
free_result(&value);
}
(*items)++;
}
DBfree_result(result);
}
/******************************************************************************
* *
* Function: process_values *
* *
* Purpose: process new item value *
* *
* Parameters: *
* *
* Return value: successfully processed items *
* *
* Author: Alexei Vladishev *
* *
* Comments: can be done in process_data() *
* *
******************************************************************************/
static int process_values(ZBX_FPING_HOST *hosts, int hosts_count, int now)
{
int i, items = 0, ping_result;
char error[ITEM_ERROR_LEN_MAX];
zabbix_log(LOG_LEVEL_DEBUG, "In process_values()");
zbx_setproctitle("pinger [pinging hosts]");
ping_result = do_ping(hosts, hosts_count, error, sizeof(error));
if (0 != CONFIG_DBSYNCER_FORKS)
DCinit_nextchecks();
for (i = 0; i < hosts_count; i++) {
if (ping_result == NOTSUPPORTED)
zabbix_log(LOG_LEVEL_DEBUG, "Host [%s] %s",
hosts[i].addr,
error);
else
zabbix_log(LOG_LEVEL_DEBUG, "Host [%s] alive [" ZBX_FS_UI64 "] " ZBX_FS_DBL " sec.",
hosts[i].addr,
hosts[i].alive,
hosts[i].sec);
process_value(SERVER_ICMPPING_KEY, &hosts[i], &hosts[i].alive, NULL, now, &items, ping_result, error);
process_value(SERVER_ICMPPINGSEC_KEY, &hosts[i], NULL, &hosts[i].sec, now, &items, ping_result, error);
}
if (0 != CONFIG_DBSYNCER_FORKS)
DCflush_nextchecks();
return items;
}
/******************************************************************************
* *
* Function: get_pinger_hosts *
* *
* Purpose: creates buffer which contains list of hosts to ping *
* *
* Parameters: *
* *
* Return value: SUCCEED - the file was created succesfully *
* FAIL - otherwise *
* *
* Author: Alexei Vladishev, Aleksander Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static int get_pinger_hosts(int now)
{
DB_RESULT result;
DB_ROW row;
int hosts_count = 0;
char istatus[16];
zabbix_log(LOG_LEVEL_DEBUG, "In get_pinger_hosts()");
if (0 != CONFIG_REFRESH_UNSUPPORTED)
zbx_snprintf(istatus, sizeof(istatus), "%d,%d",
ITEM_STATUS_ACTIVE,
ITEM_STATUS_NOTSUPPORTED);
else
zbx_snprintf(istatus, sizeof(istatus), "%d",
ITEM_STATUS_ACTIVE);
/* Select hosts monitored by IP */
result = DBselect("select distinct h.ip from hosts h,items i where " ZBX_SQL_MOD(h.hostid,%d) "=%d"
" and i.hostid=h.hostid and h.proxy_hostid=0 and h.status=%d and i.key_ in ('%s','%s')"
" and i.type=%d and i.status in (%s) and h.useip=1 and i.nextcheck<=%d" DB_NODE,
CONFIG_PINGER_FORKS,
pinger_num - 1,
HOST_STATUS_MONITORED,
SERVER_ICMPPING_KEY, SERVER_ICMPPINGSEC_KEY,
ITEM_TYPE_SIMPLE,
istatus,
now,
DBnode_local("h.hostid"));
while (NULL != (row = DBfetch(result))) {
if (hosts_count == hosts_allocated) {
hosts_allocated *= 2;
hosts = zbx_realloc(hosts, hosts_allocated * sizeof(ZBX_FPING_HOST));
}
memset(&hosts[hosts_count], '\0', sizeof(ZBX_FPING_HOST));
strscpy(hosts[hosts_count].addr, row[0]);
hosts[hosts_count].useip = 1;
zabbix_log(LOG_LEVEL_DEBUG, "IP [%s]", hosts[hosts_count].addr);
hosts_count++;
}
DBfree_result(result);
/* Select hosts monitored by hostname */
result = DBselect("select distinct h.dns from hosts h,items i where " ZBX_SQL_MOD(h.hostid,%d) "=%d"
" and i.hostid=h.hostid and h.proxy_hostid=0 and h.status=%d and i.key_ in ('%s','%s')"
" and i.type=%d and i.status in (%s) and h.useip=0 and i.nextcheck<=%d" DB_NODE,
CONFIG_PINGER_FORKS,
pinger_num - 1,
HOST_STATUS_MONITORED,
SERVER_ICMPPING_KEY, SERVER_ICMPPINGSEC_KEY,
ITEM_TYPE_SIMPLE,
istatus,
now,
DBnode_local("h.hostid"));
while (NULL != (row = DBfetch(result))) {
if (hosts_count == hosts_allocated) {
hosts_allocated *= 2;
hosts = zbx_realloc(hosts, hosts_allocated * sizeof(ZBX_FPING_HOST));
}
memset(&hosts[hosts_count], '\0', sizeof(ZBX_FPING_HOST));
strscpy(hosts[hosts_count].addr, row[0]);
hosts[hosts_count].useip = 0;
zabbix_log(LOG_LEVEL_DEBUG, "DNS name [%s]", hosts[hosts_count].addr);
hosts_count++;
}
DBfree_result(result);
zabbix_log(LOG_LEVEL_DEBUG, "End of get_pinger_hosts():%d", hosts_count);
return hosts_count;
}
/******************************************************************************
* *
* Function: get_minnextcheck *
* *
* Purpose: calculate when we have to process earliest simple check *
* *
* Parameters: now - current timestamp *
* *
* Return value: timestamp of earliest check or -1 if not found *
* *
* Author: Aleksander Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static int get_minnextcheck()
{
DB_RESULT result;
DB_ROW row;
int res;
char istatus[16];
zabbix_log(LOG_LEVEL_DEBUG, "In get_minnextcheck()");
if (0 != CONFIG_REFRESH_UNSUPPORTED)
zbx_snprintf(istatus, sizeof(istatus), "%d,%d",
ITEM_STATUS_ACTIVE,
ITEM_STATUS_NOTSUPPORTED);
else
zbx_snprintf(istatus, sizeof(istatus), "%d",
ITEM_STATUS_ACTIVE);
result = DBselect("select count(*),min(i.nextcheck) from items i,hosts h where " ZBX_SQL_MOD(h.hostid,%d) "=%d"
" and h.status=%d and h.hostid=i.hostid and h.proxy_hostid=0 and i.key_ in ('%s','%s')"
" and i.type=%d and i.status in (%s)" DB_NODE,
CONFIG_PINGER_FORKS,
pinger_num - 1,
HOST_STATUS_MONITORED,
SERVER_ICMPPING_KEY, SERVER_ICMPPINGSEC_KEY,
ITEM_TYPE_SIMPLE,
istatus,
DBnode_local("h.hostid"));
if (NULL == (row = DBfetch(result)) || DBis_null(row[0]) == SUCCEED || DBis_null(row[1]) == SUCCEED)
{
zabbix_log(LOG_LEVEL_DEBUG, "No items to update for minnextcheck.");
res = FAIL;
}
else
{
if (atoi(row[0]) == 0)
{
res = FAIL;
}
else
{
res = atoi(row[1]);
}
}
DBfree_result(result);
return res;
}
/******************************************************************************
* *
* Function: main_pinger_loop *
* *
* Purpose: periodically perform ICMP pings *
* *
* Parameters: *
* *
* Return value: *
* *
* Author: Alexei Vladishev *
* *
* Comments: never returns *
* *
******************************************************************************/
void main_pinger_loop(zbx_process_t p, int num)
{
int now, nextcheck, sleeptime;
int hosts_count, items;
double sec;
zabbix_log(LOG_LEVEL_DEBUG, "In main_pinger_loop(num:%d)",
num);
zbx_process = p;
pinger_num = num;
hosts = zbx_malloc(hosts, hosts_allocated * sizeof(ZBX_FPING_HOST));
zbx_setproctitle("pinger [connecting to the database]");
DBconnect(ZBX_DB_CONNECT_NORMAL);
for (;;)
{
now = time(NULL);
sec = zbx_time();
items = 0;
if (0 < (hosts_count = get_pinger_hosts(now)))
items = process_values(hosts, hosts_count, now);
sec = zbx_time() - sec;
nextcheck = get_minnextcheck();
if (FAIL == nextcheck)
sleeptime = CONFIG_PINGER_FREQUENCY;
else
{
sleeptime = nextcheck - time(NULL);
if (sleeptime < 0)
sleeptime = 0;
else if (sleeptime > CONFIG_PINGER_FREQUENCY)
sleeptime = CONFIG_PINGER_FREQUENCY;
}
zabbix_log(LOG_LEVEL_DEBUG, "Pinger spent " ZBX_FS_DBL " seconds while processing %d items."
" Nextcheck after %d sec.",
sec,
items,
sleeptime);
if (sleeptime > 0) {
zbx_setproctitle("pinger [sleeping for %d seconds]",
sleeptime);
sleep(sleeptime);
}
}
/* Never reached */
DBclose();
}
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