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/*
** Zabbix
** Copyright (C) 2000,2001,2002,2003,2004 Alexei Vladishev
**
** 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 "checks_agent.h"
int get_value_agent(double *result,char *result_str,DB_ITEM *item)
{
int s;
int len;
char c[MAX_STRING_LEN];
char *e;
struct hostent *hp;
struct sockaddr_in servaddr_in;
struct linger ling;
zabbix_log( LOG_LEVEL_DEBUG, "get_value_agent: host[%s] ip[%s] key [%s]", item->host, item->ip, item->key );
servaddr_in.sin_family=AF_INET;
if(item->useip==1)
{
hp=gethostbyname(item->ip);
}
else
{
hp=gethostbyname(item->host);
}
if(hp==NULL)
{
zabbix_log( LOG_LEVEL_WARNING, "gethostbyname() failed" );
return NETWORK_ERROR;
}
servaddr_in.sin_addr.s_addr=((struct in_addr *)(hp->h_addr))->s_addr;
servaddr_in.sin_port=htons(item->port);
s=socket(AF_INET,SOCK_STREAM,0);
if(CONFIG_NOTIMEWAIT == 1)
{
ling.l_onoff=1;
ling.l_linger=0;
if(setsockopt(s,SOL_SOCKET,SO_LINGER,&ling,sizeof(ling))==-1)
{
zabbix_log(LOG_LEVEL_WARNING, "Cannot setsockopt SO_LINGER [%s]", strerror(errno));
}
}
if(s == -1)
{
zabbix_log(LOG_LEVEL_WARNING, "Cannot create socket [%s]",
strerror(errno));
return FAIL;
}
if( connect(s,(struct sockaddr *)&servaddr_in,sizeof(struct sockaddr_in)) == -1 )
{
switch (errno)
{
case EINTR:
zabbix_log( LOG_LEVEL_WARNING, "Timeout while connecting to [%s]",item->host );
break;
case EHOSTUNREACH:
zabbix_log( LOG_LEVEL_WARNING, "No route to host [%s]",item->host );
break;
default:
zabbix_log( LOG_LEVEL_WARNING, "Cannot connect to [%s] [%s]",item->host, strerror(errno));
}
close(s);
return NETWORK_ERROR;
}
snprintf(c,sizeof(c)-1,"%s\n",item->key);
zabbix_log(LOG_LEVEL_DEBUG, "Sending [%s]", c);
if( write(s,c,strlen(c)) == -1 )
{
switch (errno)
{
case EINTR:
zabbix_log( LOG_LEVEL_WARNING, "Timeout while sending data to [%s]",item->host );
break;
default:
zabbix_log( LOG_LEVEL_WARNING, "Error while sending data to [%s] [%s]",item->host, strerror(errno));
}
close(s);
return FAIL;
}
memset(c,0,MAX_STRING_LEN);
len=read(s,c,MAX_STRING_LEN);
if(len == -1)
{
switch (errno)
{
case EINTR:
zabbix_log( LOG_LEVEL_WARNING, "Timeout while receiving data from [%s]",item->host );
break;
case ECONNRESET:
zabbix_log( LOG_LEVEL_WARNING, "Connection reset by peer. Host [%s] Parameter [%s]",item->host, item->key );
close(s);
return NETWORK_ERROR;
default:
zabbix_log( LOG_LEVEL_WARNING, "Error while receiving data from [%s] [%s]",item->host, strerror(errno));
}
close(s);
return FAIL;
}
if( close(s)!=0 )
{
zabbix_log(LOG_LEVEL_WARNING, "Problem with close [%s]", strerror(errno));
}
zabbix_log(LOG_LEVEL_DEBUG, "Got string:[%d] [%s]", len, c);
if(len>0)
{
c[len-1]=0;
}
*result=strtod(c,&e);
/* The section should be improved */
if( (*result==0) && (c==e) && (item->value_type==0) && (strcmp(c,"ZBX_NOTSUPPORTED") != 0) && (strcmp(c,"ZBX_ERROR") != 0) )
{
zabbix_log( LOG_LEVEL_WARNING, "Got empty string from [%s] IP [%s] Parameter [%s]", item->host, item->ip, item->key);
zabbix_log( LOG_LEVEL_WARNING, "Assuming that agent dropped connection because of access permissions");
return NETWORK_ERROR;
}
/* Should be deleted in Zabbix 1.0 stable */
if( cmp_double(*result,NOTSUPPORTED) == 0)
{
zabbix_log(LOG_LEVEL_DEBUG, "NOTSUPPORTED1 [%s]", c );
return NOTSUPPORTED;
}
if( strcmp(c,"ZBX_NOTSUPPORTED") == 0)
{
zabbix_log(LOG_LEVEL_DEBUG, "NOTSUPPORTED2 [%s]", c );
return NOTSUPPORTED;
}
if( strcmp(c,"ZBX_ERROR") == 0)
{
zabbix_log(LOG_LEVEL_DEBUG, "AGENT_ERROR [%s]", c );
return AGENT_ERROR;
}
strcpy(result_str,c);
zabbix_log(LOG_LEVEL_DEBUG, "RESULT_STR [%s]", c );
return SUCCEED;
}
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