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vmbix-4.0.c
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vmbix-4.0.c
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/*
** 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.
**
** This program reuses some code from Zabbix SIA & DAISUKE Ikeda
** Copyright (C) 2014 dav3860
** Copyright (C) 2014 DAISUKE Ikeda
** Copyright (C) 2001-2014 Zabbix SIA
**
**/
#include "common.h"
#include "threads.h"
#include "comms.h"
#include "cfg.h"
#include "zbxgetopt.h"
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdint.h>
#include "module.h"
#include "../../libs/zbxcrypto/tls.h"
#ifndef _WINDOWS
# include "zbxnix.h"
#endif
#include <log.h>
#define VMBIX_MODULE_VERSION "1.4"
#define VMBIX_HOST "127.0.0.1"
#define VMBIX_PORT 12050
#define CONFIG_FILE "/etc/zabbix/vmbix_module.conf"
/* the variable keeps timeout setting for item processing */
static int item_timeout = 30;
unsigned int configured_tls_connect_mode = ZBX_TCP_SEC_UNENCRYPTED;
/* module SHOULD define internal functions as static and use a naming pattern different from Zabbix internal */
/* symbols (zbx_*) and loadable module API functions (zbx_module_*) to avoid conflicts */
static int CONFIG_MODULE_TIMEOUT = 30;
static int zbx_module_vmbix(AGENT_REQUEST *request, AGENT_RESULT *result);
static int zbx_module_vmbix_ping(AGENT_REQUEST *request, AGENT_RESULT *result);
static ZBX_METRIC keys[] =
/* KEY FLAG FUNCTION TEST PARAMETERS */
{
{"vmbix", CF_HAVEPARAMS, zbx_module_vmbix, NULL},
{"vmbix.ping", CF_HAVEPARAMS, zbx_module_vmbix_ping, NULL},
{NULL}
};
/******************************************************************************
* *
* Function: zbx_module_load_config *
* *
* Purpose: *
* *
* Return value: ZBX_MODULE_OK - success *
* ZBX_MODULE_FAIL - module initialization failed *
* *
* Comment: *
* *
******************************************************************************/
static void zbx_module_load_config()
{
printf("Loading VmBix module configuration file %s\n", CONFIG_FILE);
static struct cfg_line cfg[] =
{
{"VmBixModuleTimeout", &CONFIG_MODULE_TIMEOUT, TYPE_INT, PARM_OPT, 1, 600},
{ NULL },
};
parse_cfg_file(CONFIG_FILE, cfg, ZBX_CFG_FILE_OPTIONAL, ZBX_CFG_STRICT);
}
/******************************************************************************
* *
* Function: zbx_module_get_value *
* *
* Purpose: connect with Zabbix agent protocol, receive and print value *
* *
* Parameters: con_string - vCenter or ESX connection string, format : *
* tcp://hostname:port *
* source_ip - source IP address *
* key - item's key *
* *
******************************************************************************/
static int zbx_module_get_value(const char *source_ip, const char *host, unsigned short port, const char *key, char **value)
{
zbx_socket_t s;
int ret;
ssize_t bytes_received = -1;
char *request;
// assert(value);
// *value = NULL;
if (SUCCEED == (ret = zbx_tcp_connect(&s, source_ip, host, port, GET_SENDER_TIMEOUT,
configured_tls_connect_mode, NULL, NULL)))
{
request = zbx_dsprintf(NULL, "%s\n", key);
if (SUCCEED == (ret = zbx_tcp_send(&s, request)))
{
// zbx_tcp_recv_exts only accepts two arguments in zabbix 4.0
if (0 < (bytes_received = zbx_tcp_recv_ext(&s, ZBX_TCP_READ_UNTIL_CLOSE)))
{
if (0 != strcmp(s.buffer, ZBX_NOTSUPPORTED) || sizeof(ZBX_NOTSUPPORTED) >= s.read_bytes)
{
zbx_rtrim(s.buffer, "\r\n");
*value = strdup(s.buffer);
}
}
}
zbx_free(request);
zbx_tcp_close(&s);
}
return ret;
}
/******************************************************************************
* *
* Function: zbx_module_api_version *
* *
* Purpose: returns version number of the module interface *
* *
* Return value: ZBX_MODULE_API_VERSION_ONE - the only version supported by *
* Zabbix currently *
* *
******************************************************************************/
int zbx_module_api_version()
{
return ZBX_MODULE_API_VERSION;
}
/******************************************************************************
* *
* Function: zbx_module_item_timeout *
* *
* Purpose: set timeout value for processing of items *
* *
* Parameters: timeout - timeout in seconds, 0 - no timeout set *
* *
******************************************************************************/
void zbx_module_item_timeout(int timeout)
{
item_timeout = timeout;
}
/******************************************************************************
* *
* Function: zbx_module_item_list *
* *
* Purpose: returns list of item keys supported by the module *
* *
* Return value: list of item keys *
* *
******************************************************************************/
ZBX_METRIC *zbx_module_item_list()
{
return keys;
}
/******************************************************************************
* *
* Function: zbx_module_init *
* *
* Purpose: the function is called on agent startup *
* It should be used to call any initialization routines *
* *
* Return value: ZBX_MODULE_OK - success *
* ZBX_MODULE_FAIL - module initialization failed *
* *
* Comment: the module won't be loaded in case of ZBX_MODULE_FAIL *
* *
******************************************************************************/
int zbx_module_init()
{
printf("VmBix module version %s\n", VMBIX_MODULE_VERSION);
srand(time(NULL));
zbx_module_load_config();
printf("VmBix Timeout: %d (s)\n", CONFIG_MODULE_TIMEOUT);
printf("Zabbix Version: %s\n", ZABBIX_VERSION);
return ZBX_MODULE_OK;
}
/******************************************************************************
* *
* Function: zbx_module_uninit *
* *
* Purpose: the function is called on agent shutdown *
* It should be used to cleanup used resources if there are any *
* *
* Return value: ZBX_MODULE_OK - success *
* ZBX_MODULE_FAIL - function failed *
* *
******************************************************************************/
int zbx_module_uninit()
{
return ZBX_MODULE_OK;
}
int param_is_empty(char *param_to_check) {
return (param_to_check[0] == '\0') ? 1: 0;
}
/******************************************************************************
* *
* Function: zbx_module_concat *
* *
* Purpose: Concatenate two or more strings *
* *
* Comment: *
* *
******************************************************************************/
char* zbx_module_concat(int count, ...)
{
va_list ap;
int i;
// Find required length to store merged string
int len = 1; // room for NULL
va_start(ap, count);
for(i=0 ; i<count ; i++)
len += strlen(va_arg(ap, char*));
va_end(ap);
// Allocate memory to concat strings
char *merged = calloc(sizeof(char),len);
int null_pos = 0;
// Actually concatenate strings
va_start(ap, count);
for(i=0 ; i<count ; i++)
{
char *s = va_arg(ap, char*);
zbx_strlcpy(merged + null_pos, s, 256);
null_pos += strlen(s);
}
va_end(ap);
return merged;
}
/******************************************************************************
* *
* Function: zbx_module_vmbix *
* *
* Purpose: queries VMBix *
* *
* Return value: list of values *
* *
******************************************************************************/
int zbx_module_vmbix(AGENT_REQUEST *request, AGENT_RESULT *result)
{
int ret = SUCCEED;
char *value = NULL, *source_ip = NULL, *key = NULL, *conn = NULL;
char host[100] = VMBIX_HOST;
int port = VMBIX_PORT;
zbx_module_item_timeout(CONFIG_MODULE_TIMEOUT);
if (request->nparam == 0 || request->nparam >= 7)
{
/* set optional error message */
SET_MSG_RESULT(result, strdup("Incorrect number of parameters, expecting at least one parameter."));
return SYSINFO_RET_FAIL;
}
if (strstr(get_rparam(request, 0), "tcp://") != NULL) { // Connection string was provided
conn = get_rparam(request, 0);
memmove(conn, conn+6, strlen(conn));
sscanf(conn, "%99[^:]:%99d[^\n]", host, &port);
// Construct query
if (request->nparam == 2)
key = zbx_module_concat(1, get_rparam(request, 1));
if (request->nparam == 3)
key = zbx_module_concat(4, get_rparam(request, 1), "[", get_rparam(request, 2), "]");
if (request->nparam == 4)
key = zbx_module_concat(6, get_rparam(request, 1), "[", get_rparam(request, 2), ",", get_rparam(request, 3), "]");
if (request->nparam == 5)
key = zbx_module_concat(8, get_rparam(request, 1), "[", get_rparam(request, 2), ",", get_rparam(request, 3), ",", get_rparam(request, 4), "]");
if (request->nparam == 6)
key = zbx_module_concat(10, get_rparam(request, 1), "[", get_rparam(request, 2), ",", get_rparam(request, 3), ",", get_rparam(request, 4), ",", get_rparam(request, 5), "]");
} else {
// Construct query
if (request->nparam == 1)
key = zbx_module_concat(1, get_rparam(request, 0));
if (request->nparam == 2)
key = zbx_module_concat(4, get_rparam(request, 0), "[", get_rparam(request, 1), "]");
if (request->nparam == 3)
key = zbx_module_concat(6, get_rparam(request, 0), "[", get_rparam(request, 1), ",", get_rparam(request, 2), "]");
if (request->nparam == 4)
key = zbx_module_concat(8, get_rparam(request, 0), "[", get_rparam(request, 1), ",", get_rparam(request, 2), ",", get_rparam(request, 3), "]");
if (request->nparam == 5)
key = zbx_module_concat(10, get_rparam(request, 0), "[", get_rparam(request, 1), ",", get_rparam(request, 2), ",", get_rparam(request, 3), ",", get_rparam(request, 4), "]");
}
// printf("Using VmBix host %s:%d\n", host, port);
if (SUCCEED == ret)
{
ret = zbx_module_get_value(source_ip, host, port, key, &value);
if (SUCCEED == ret && value != NULL) {
// printf("Received reply from VmBix. Query: %s, result: %s\n", strdup(key), strdup(value));
SET_STR_RESULT(result, strdup(value));
}
zbx_free(value);
}
//zbx_free(conn);
zbx_free(key);
zbx_free(source_ip);
return SYSINFO_RET_OK;
}
/*****************************************************************************
* *
* Function: zbx_module_vmbix_ping *
* *
* Purpose: echoes back the first parameter *
* *
* Return value: the value it was invoked with *
* *
******************************************************************************/
int zbx_module_vmbix_ping(AGENT_REQUEST *request, AGENT_RESULT *result)
{
char *param;
if (1 != request->nparam)
{
SET_MSG_RESULT(result, strdup("Invalid number of key parameters"));
return (SYSINFO_RET_FAIL);
}
param = get_rparam(request, 0);
SET_STR_RESULT(result, strdup(param));
return (SYSINFO_RET_OK);
}