static int db_odbc_select(DC_ITEM *item, AGENT_REQUEST *request, AGENT_RESULT *result)
{
const char *__function_name = "db_odbc_select";
int ret = NOTSUPPORTED;
ZBX_ODBC_DBH dbh;
ZBX_ODBC_ROW row;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() query:'%s'", __function_name, item->params);
if (2 != request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid number of parameters."));
goto out;
}
if (SUCCEED != odbc_DBconnect(&dbh, request->params[1], item->username, item->password, CONFIG_TIMEOUT))
{
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
goto out;
}
if (NULL != odbc_DBselect(&dbh, item->params))
{
if (NULL != (row = odbc_DBfetch(&dbh)))
{
if (NULL == row[0])
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "SQL query returned NULL value."));
}
else if (SUCCEED == set_result_type(result, item->value_type, item->data_type, row[0]))
{
ret = SUCCEED;
}
}
else
{
const char *last_error = get_last_odbc_strerror();
if ('\0' != *last_error)
SET_MSG_RESULT(result, zbx_strdup(NULL, last_error));
else
SET_MSG_RESULT(result, zbx_strdup(NULL, "SQL query returned empty result."));
}
}
else
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
odbc_DBclose(&dbh);
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
static int db_odbc_discovery(DC_ITEM *item, AGENT_REQUEST *request, AGENT_RESULT *result)
{
const char *__function_name = "db_odbc_discovery";
int ret = NOTSUPPORTED, i, j;
ZBX_ODBC_DBH dbh;
ZBX_ODBC_ROW row;
char **columns, *p, macro[MAX_STRING_LEN];
struct zbx_json json;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() query:'%s'", __function_name, item->params);
if (2 != request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid number of parameters."));
goto out;
}
if (SUCCEED != odbc_DBconnect(&dbh, request->params[1], item->username, item->password, CONFIG_TIMEOUT))
{
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
goto out;
}
if (NULL != odbc_DBselect(&dbh, item->params))
{
columns = zbx_malloc(NULL, sizeof(char *) * dbh.col_num);
if (SUCCEED == get_result_columns(&dbh, columns))
{
for (i = 0; i < dbh.col_num; i++)
zabbix_log(LOG_LEVEL_DEBUG, "%s() column[%d]:'%s'", __function_name, i + 1, columns[i]);
for (i = 0; i < dbh.col_num; i++)
{
for (p = columns[i]; '\0' != *p; p++)
{
if (0 != isalpha((unsigned char)*p))
*p = toupper((unsigned char)*p);
if (SUCCEED != is_macro_char(*p))
{
SET_MSG_RESULT(result, zbx_dsprintf(NULL,
"Cannot convert column #%d name to macro.", i + 1));
goto clean;
}
}
for (j = 0; j < i; j++)
{
if (0 == strcmp(columns[i], columns[j]))
{
SET_MSG_RESULT(result, zbx_dsprintf(NULL,
"Duplicate macro name: {#%s}.", columns[i]));
goto clean;
}
}
}
zbx_json_init(&json, ZBX_JSON_STAT_BUF_LEN);
zbx_json_addarray(&json, ZBX_PROTO_TAG_DATA);
while (NULL != (row = odbc_DBfetch(&dbh)))
{
zbx_json_addobject(&json, NULL);
for (i = 0; i < dbh.col_num; i++)
{
zbx_snprintf(macro, MAX_STRING_LEN, "{#%s}", columns[i]);
zbx_json_addstring(&json, macro, row[i], ZBX_JSON_TYPE_STRING);
}
zbx_json_close(&json);
}
zbx_json_close(&json);
SET_STR_RESULT(result, zbx_strdup(NULL, json.buffer));
zbx_json_free(&json);
ret = SUCCEED;
clean:
for (i = 0; i < dbh.col_num; i++)
zbx_free(columns[i]);
}
else
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot obtain column names."));
zbx_free(columns);
}
else
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
odbc_DBclose(&dbh);
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/******************************************************************************
* *
* Function: get_value_db *
* *
* Purpose: retrieve data from database *
* *
* Parameters: item - item we are interested in *
* *
* Return value: SUCCEED - data successfully retrieved and stored in result *
* NOTSUPPORTED - requested item is not supported *
* *
* Author: Eugene Grigorjev *
* *
* Comments: *
* *
******************************************************************************/
int get_value_db(DC_ITEM *item, AGENT_RESULT *result)
{
const char *__function_name = "get_value_db";
#ifdef HAVE_ODBC
ZBX_ODBC_DBH dbh;
ZBX_ODBC_ROW row;
char *db_dsn = NULL, *db_user = NULL, *db_pass = NULL, *db_sql = NULL;
#endif
int ret = NOTSUPPORTED;
init_result(result);
zabbix_log(LOG_LEVEL_DEBUG, "In %s() key_orig:'%s'", __function_name, item->key_orig);
#ifdef HAVE_ODBC
#define DB_ODBC_SELECT_KEY "db.odbc.select["
if (0 == strncmp(item->key, DB_ODBC_SELECT_KEY, strlen(DB_ODBC_SELECT_KEY)))
{
db_dsn = get_param_value(item->params, "DSN");
db_user = get_param_value(item->params, "user");
db_pass = get_param_value(item->params, "password");
db_sql = get_param_value(item->params, "sql");
if (SUCCEED == odbc_DBconnect(&dbh, db_dsn, db_user, db_pass, CONFIG_TIMEOUT))
{
if (NULL != odbc_DBselect(&dbh, db_sql))
{
if (NULL != (row = odbc_DBfetch(&dbh)))
{
if (NULL == row[0])
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "SQL query returned NULL "
"value."));
}
else if (SUCCEED == set_result_type(result, item->value_type, item->data_type,
row[0]))
{
ret = SUCCEED;
}
}
else
{
const char *last_error = get_last_odbc_strerror();
if ('\0' != *last_error)
SET_MSG_RESULT(result, zbx_strdup(NULL, last_error));
else
SET_MSG_RESULT(result, zbx_strdup(NULL, "SQL query returned empty "
"result."));
}
}
else
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
odbc_DBclose(&dbh);
}
else
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
zbx_free(db_dsn);
zbx_free(db_user);
zbx_free(db_pass);
zbx_free(db_sql);
}
#undef DB_ODBC_SELECT_KEY
#endif /* HAVE_ODBC */
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
int odbc_DBconnect(ZBX_ODBC_DBH *pdbh, char *db_dsn, char *user, char *pass, int login_timeout)
{
const char *__function_name = "odbc_DBconnect";
int ret = FAIL;
SQLRETURN rc;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() db_dsn:'%s' user:'******'", __function_name, db_dsn, user);
clean_odbc_strerror();
memset(pdbh, 0, sizeof(ZBX_ODBC_DBH));
/* allocate environment handle */
if (0 == SQL_SUCCEEDED(SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &(pdbh->henv))))
{
set_last_odbc_strerror("%s", "Cannot create ODBC environment handle.");
goto end;
}
/* set the ODBC version environment attribute */
if (0 != CALLODBC(SQLSetEnvAttr(pdbh->henv, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0), rc, SQL_HANDLE_ENV,
pdbh->henv, "Cannot set ODBC version"))
{
goto end;
}
/* allocate connection handle */
if (0 != CALLODBC(SQLAllocHandle(SQL_HANDLE_DBC, pdbh->henv, &(pdbh->hdbc)), rc, SQL_HANDLE_ENV, pdbh->henv,
"Cannot create ODBC connection handle"))
{
goto end;
}
/* set login timeout */
if (0 != CALLODBC(SQLSetConnectAttr(pdbh->hdbc, (SQLINTEGER)SQL_LOGIN_TIMEOUT,
(SQLPOINTER)(intptr_t)login_timeout, (SQLINTEGER)0), rc, SQL_HANDLE_DBC, pdbh->hdbc,
"Cannot set ODBC login timeout"))
{
goto end;
}
/* connect to data source */
if (0 != CALLODBC(SQLConnect(pdbh->hdbc, (SQLCHAR *)db_dsn, SQL_NTS, (SQLCHAR *)user, SQL_NTS, (SQLCHAR *)pass,
SQL_NTS), rc, SQL_HANDLE_DBC, pdbh->hdbc, "Cannot connect to ODBC DSN"))
{
goto end;
}
/* allocate statement handle */
if (0 != CALLODBC(SQLAllocHandle(SQL_HANDLE_STMT, pdbh->hdbc, &(pdbh->hstmt)), rc, SQL_HANDLE_DBC, pdbh->hdbc,
"Cannot create ODBC statement handle."))
{
goto end;
}
pdbh->connected = 1;
ret = SUCCEED;
end:
if (SUCCEED != ret)
odbc_DBclose(pdbh);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/******************************************************************************
* *
* Function: get_value_db *
* *
* Purpose: retrieve data from database *
* *
* Parameters: item - item we are interested in *
* *
* Return value: SUCCEED - data successfully retrieved and stored in result *
* NOTSUPPORTED - requested item is not supported *
* *
* Author: Eugene Grigorjev *
* *
* Comments: *
* *
******************************************************************************/
int get_value_db(DC_ITEM *item, AGENT_RESULT *result)
{
const char *__function_name = "get_value_db";
ZBX_ODBC_DBH dbh;
ZBX_ODBC_ROW row;
AGENT_REQUEST request;
int ret = NOTSUPPORTED;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() key_orig:'%s'", __function_name, item->key_orig);
init_request(&request);
if (SUCCEED != parse_item_key(item->key, &request))
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Key is badly formatted."));
goto out;
}
if (0 != strcmp(request.key, "db.odbc.select"))
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Item key is not supported."));
goto out;
}
if (2 != request.nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid number of parameters."));
goto out;
}
if (SUCCEED == odbc_DBconnect(&dbh, request.params[1], item->username, item->password, CONFIG_TIMEOUT))
{
if (NULL != odbc_DBselect(&dbh, item->params))
{
if (NULL != (row = odbc_DBfetch(&dbh)))
{
if (NULL == row[0])
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "SQL query returned NULL value."));
}
else if (SUCCEED == set_result_type(result, item->value_type, item->data_type, row[0]))
{
ret = SUCCEED;
}
}
else
{
const char *last_error = get_last_odbc_strerror();
if ('\0' != *last_error)
SET_MSG_RESULT(result, zbx_strdup(NULL, last_error));
else
SET_MSG_RESULT(result, zbx_strdup(NULL, "SQL query returned empty result."));
}
}
else
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
odbc_DBclose(&dbh);
}
else
SET_MSG_RESULT(result, zbx_strdup(NULL, get_last_odbc_strerror()));
out:
free_request(&request);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}