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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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#include <time.h>
#include <sys/socket.h>
#include <errno.h>
#include "nodecommand.h"
#include "comms.h"
#include "common.h"
#include "db.h"
#include "log.h"
#include "zlog.h"
#define MVAR_HOST_NAME "{HOSTNAME}"
#define MVAR_IPADDRESS "{IPADDRESS}"
#define MVAR_HOST_CONN "{HOST.CONN}"
/******************************************************************************
* *
* Function: execute_script *
* *
* Purpose: executing command *
* *
* Parameters: *
* *
* Return value: SUCCEED - processed successfully *
* FAIL - an error occured *
* *
* Author: Aleksander Vladishev *
* *
* Comments: *
* *
******************************************************************************/
void execute_script(const char *command, char **result, int *result_allocated)
{
int result_offset = 0;
char buffer[MAX_STRING_LEN];
FILE *f;
zabbix_log(LOG_LEVEL_DEBUG, "In execute_script(command:%s)", command);
if(0 != (f = popen(command, "r"))) {
zbx_snprintf_alloc(result, result_allocated, &result_offset, 8, "%d%c",
SUCCEED,
ZBX_DM_DELIMITER);
while (NULL != fgets(buffer, sizeof(buffer)-1, f)) {
zbx_snprintf_alloc(result, result_allocated, &result_offset, sizeof(buffer),
"%s",
buffer);
}
(*result)[result_offset] = '\0';
pclose(f);
} else {
zbx_snprintf_alloc(result, result_allocated, &result_offset, 128,
"%d%cNODE %d: Cannot execute [%s] error:%s",
FAIL,
ZBX_DM_DELIMITER,
CONFIG_NODEID,
command,
strerror(errno));
}
}
/******************************************************************************
* *
* Function: send_script *
* *
* Purpose: sending command to slave node *
* *
* Parameters: *
* *
* Return value: SUCCEED - processed successfully *
* FAIL - an error occured *
* *
* Author: Aleksander Vladishev *
* *
* Comments: *
* *
******************************************************************************/
void send_script(int nodeid, const char *data, char **result, int *result_allocated)
{
DB_RESULT dbresult;
DB_ROW dbrow;
int result_offset = 0;
zbx_sock_t sock;
char *answer;
zabbix_log(LOG_LEVEL_DEBUG, "In send_script(nodeid:%d)", nodeid);
dbresult = DBselect("select ip,port from nodes where nodeid=%d",
nodeid);
if (NULL != (dbrow = DBfetch(dbresult))) {
if (SUCCEED == zbx_tcp_connect(&sock, CONFIG_SOURCE_IP, dbrow[0], atoi(dbrow[1]), 0)) {
if (FAIL == zbx_tcp_send(&sock, data)) {
zbx_snprintf_alloc(result, result_allocated, &result_offset, 128,
"%d%cNODE %d: Error while sending data to Node [%d] error: %s",
FAIL,
ZBX_DM_DELIMITER,
CONFIG_NODEID,
nodeid,
zbx_tcp_strerror());
goto exit_sock;
}
if (SUCCEED == zbx_tcp_recv(&sock, &answer/*, ZBX_TCP_READ_UNTIL_CLOSE*/)) {
zbx_snprintf_alloc(result, result_allocated, &result_offset, strlen(answer)+1,
"%s",
answer);
} else {
zbx_snprintf_alloc(result, result_allocated, &result_offset, 128,
"%d%cNODE %d: Error while receiving answer from Node [%d] error: %s",
FAIL,
ZBX_DM_DELIMITER,
CONFIG_NODEID,
nodeid,
zbx_tcp_strerror());
goto exit_sock;
}
exit_sock:
zbx_tcp_close(&sock);
} else {
zbx_snprintf_alloc(result, result_allocated, &result_offset, 128,
"%d%cNODE %d: Unable to connect to Node [%d] error: %s",
FAIL,
ZBX_DM_DELIMITER,
CONFIG_NODEID,
nodeid,
zbx_tcp_strerror());
}
} else {
zbx_snprintf_alloc(result, result_allocated, &result_offset, 128,
"%d%cNODE %d: Node [%d] is unknown",
FAIL,
ZBX_DM_DELIMITER,
CONFIG_NODEID,
nodeid);
}
DBfree_result(dbresult);
}
/******************************************************************************
* *
* Function: get_next_point_to_node *
* *
* Purpose: find next point to slave node *
* *
* Parameters: *
* *
* Return value: SUCCEED - processed successfully *
* FAIL - an error occured *
* *
* Author: Aleksander Vladishev *
* *
* Comments: *
* *
******************************************************************************/
int get_next_point_to_node(int current_nodeid, int slave_nodeid, int *nodeid)
{
DB_RESULT dbresult;
DB_ROW dbrow;
int id, res = FAIL;
dbresult = DBselect("select nodeid from nodes where masterid=%d",
current_nodeid);
while (NULL != (dbrow = DBfetch(dbresult))) {
id = atoi(dbrow[0]);
if (id == slave_nodeid || SUCCEED == get_next_point_to_node(id, slave_nodeid, NULL)) {
if (NULL != nodeid)
*nodeid = id;
res = SUCCEED;
break;
}
}
DBfree_result(dbresult);
return res;
}
/******************************************************************************
* *
* Function: node_process_command *
* *
* Purpose: process command received from a master node or php *
* *
* Parameters: *
* *
* Return value: SUCCEED - processed successfully *
* FAIL - an error occured *
* *
* Author: Aleksander Vladishev *
* *
* Comments: *
* *
******************************************************************************/
int node_process_command(zbx_sock_t *sock, const char *data)
{
const char *r;
char *tmp = NULL, *result = NULL;
int tmp_allocated = 64, result_allocated = 1024;
int datalen;
int nodeid, next_nodeid;
int result_offset = 0;
result = zbx_malloc(result, result_allocated);
tmp = zbx_malloc(tmp, tmp_allocated);
datalen = strlen(data);
zabbix_log(LOG_LEVEL_DEBUG, "In node_process_command(datalen:%d)",
datalen);
r = data;
zbx_get_next_field(&r, &tmp, &tmp_allocated, ZBX_DM_DELIMITER); /* Constant 'Command' */
zbx_get_next_field(&r, &tmp, &tmp_allocated, ZBX_DM_DELIMITER); /* NodeID */
nodeid = atoi(tmp);
zbx_get_next_field(&r, &tmp, &tmp_allocated, ZBX_DM_DELIMITER);
if (nodeid == CONFIG_NODEID) {
zabbix_log(LOG_LEVEL_WARNING, "NODE %d: Received command \"%s\"",
CONFIG_NODEID,
tmp);
execute_script(tmp, &result, &result_allocated);
} else if (SUCCEED == get_next_point_to_node(CONFIG_NODEID, nodeid, &next_nodeid)) {
zabbix_log(LOG_LEVEL_WARNING, "NODE %d: Sending command \"%s\" for nodeid %d"
"to node %d",
CONFIG_NODEID,
tmp,
nodeid,
next_nodeid);
send_script(next_nodeid, data, &result, &result_allocated);
} else {
zbx_snprintf_alloc(&result, &result_allocated, &result_offset, 128,
"%d%cNODE %d: Node [%d] is unknown",
FAIL,
ZBX_DM_DELIMITER,
CONFIG_NODEID,
nodeid);
}
if (zbx_tcp_send_raw(sock, result) != SUCCEED) {
zabbix_log(LOG_LEVEL_WARNING, "NODE %d: Error sending result of command to node %d",
CONFIG_NODEID,
nodeid);
}
zbx_free(tmp);
zbx_free(result);
return SUCCEED;
}
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