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/*
** Zabbix
** Copyright (C) 2001-2019 Zabbix SIA
**
** 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.
**/
#include "common.h"
#include "log.h"
#include "zbxjson.h"
#include "zbxalgo.h"
#include "preproc.h"
#include "trapper_preproc.h"
/******************************************************************************
* *
* Function: zbx_trapper_preproc_test *
* *
* Purpose: processes preprocessing test request *
* *
* Parameters: sock - [IN] the request source socket (frontend) *
* jp - [IN] the request *
* *
* Return value: SUCCEED - the request was processed successfully *
* FAIL - otherwise *
* *
* Comments: This function will send proper (success/fail) response to the *
* request socket. *
* Preprocessing failure (error returned by a preprocessing step) *
* is counted as successful test and will return success response. *
* *
******************************************************************************/
int zbx_trapper_preproc_test(zbx_socket_t *sock, const struct zbx_json_parse *jp)
{
char buffer[MAX_STRING_LEN], *error = NULL, *value = NULL, *last_value = NULL,
*last_ts = NULL, *step_params = NULL, *error_handler_params = NULL,
*preproc_error = NULL;
zbx_user_t user;
int ret = FAIL, i;
struct zbx_json_parse jp_data, jp_history, jp_steps, jp_step;
size_t size;
unsigned char value_type, step_type, error_handler;
zbx_vector_ptr_t steps, results;
const char *pnext;
struct zbx_json json;
zbx_vector_ptr_create(&steps);
zbx_vector_ptr_create(&results);
if (FAIL == zbx_json_value_by_name(jp, ZBX_PROTO_TAG_SID, buffer, sizeof(buffer)) ||
SUCCEED != DBget_user_by_active_session(buffer, &user) || USER_TYPE_ZABBIX_ADMIN > user.type)
{
error = zbx_strdup(NULL, "Permission denied.");
goto out;
}
if (FAIL == zbx_json_brackets_by_name(jp, ZBX_PROTO_TAG_DATA, &jp_data))
{
error = zbx_strdup(NULL, "Missing data field.");
goto out;
}
size = 0;
if (FAIL == zbx_json_value_by_name_dyn(&jp_data, ZBX_PROTO_TAG_VALUE, &value, &size))
{
error = zbx_strdup(NULL, "Missing value field.");
goto out;
}
if (FAIL == zbx_json_value_by_name(&jp_data, ZBX_PROTO_TAG_VALUE_TYPE, buffer, sizeof(buffer)))
{
error = zbx_strdup(NULL, "Missing value type field.");
goto out;
}
value_type = atoi(buffer);
if (SUCCEED == zbx_json_brackets_by_name(&jp_data, ZBX_PROTO_TAG_HISTORY, &jp_history))
{
size = 0;
if (FAIL == zbx_json_value_by_name_dyn(&jp_history, ZBX_PROTO_TAG_VALUE, &last_value, &size))
{
error = zbx_strdup(NULL, "Missing history value field.");
goto out;
}
size = 0;
if (FAIL == zbx_json_value_by_name_dyn(&jp_history, ZBX_PROTO_TAG_TIMESTAMP, &last_ts, &size))
{
error = zbx_strdup(NULL, "Missing history timestamp field.");
goto out;
}
}
if (FAIL == zbx_json_brackets_by_name(&jp_data, ZBX_PROTO_TAG_STEPS, &jp_steps))
{
error = zbx_strdup(NULL, "Missing preprocessing steps field.");
goto out;
}
for (pnext = NULL; NULL != (pnext = zbx_json_next(&jp_steps, pnext));)
{
zbx_preproc_op_t *step;
if (FAIL == zbx_json_brackets_open(pnext, &jp_step))
{
error = zbx_strdup(NULL, "Cannot parse preprocessing step.");
goto out;
}
if (FAIL == zbx_json_value_by_name(&jp_step, ZBX_PROTO_TAG_TYPE, buffer, sizeof(buffer)))
{
error = zbx_strdup(NULL, "Missing preprocessing step type field.");
goto out;
}
step_type = atoi(buffer);
if (FAIL == zbx_json_value_by_name(&jp_step, ZBX_PROTO_TAG_ERROR_HANDLER, buffer, sizeof(buffer)))
{
error = zbx_strdup(NULL, "Missing preprocessing step type error handler field.");
goto out;
}
error_handler = atoi(buffer);
size = 0;
if (FAIL == zbx_json_value_by_name_dyn(&jp_step, ZBX_PROTO_TAG_PARAMS, &step_params, &size))
{
error = zbx_strdup(NULL, "Missing preprocessing step type params field.");
goto out;
}
size = 0;
if (FAIL == zbx_json_value_by_name_dyn(&jp_step, ZBX_PROTO_TAG_ERROR_HANDLER_PARAMS,
&error_handler_params, &size))
{
error = zbx_strdup(NULL, "Missing preprocessing step type error handler params field.");
goto out;
}
step = (zbx_preproc_op_t *)zbx_malloc(NULL, sizeof(zbx_preproc_op_t));
step->type = step_type;
step->params = step_params;
step->error_handler = error_handler;
step->error_handler_params = error_handler_params;
zbx_vector_ptr_append(&steps, step);
step_params = NULL;
error_handler_params = NULL;
}
if (FAIL == zbx_preprocessor_test(value_type, value, last_value, last_ts, &steps, &results, &preproc_error,
&error))
{
goto out;
}
zbx_json_init(&json, results.values_num * 256);
zbx_json_addstring(&json, ZBX_PROTO_TAG_RESPONSE, "success", ZBX_JSON_TYPE_STRING);
zbx_json_addarray(&json, ZBX_PROTO_TAG_DATA);
for (i = 0; i < results.values_num; i++)
{
zbx_preproc_result_t *result = (zbx_preproc_result_t *)results.values[i];
zbx_json_addobject(&json, NULL);
if (NULL != result->error)
zbx_json_addstring(&json, ZBX_PROTO_TAG_ERROR, result->error, ZBX_JSON_TYPE_STRING);
if (ZBX_PREPROC_FAIL_DEFAULT != result->action)
zbx_json_adduint64(&json, ZBX_PROTO_TAG_ACTION, result->action);
if (i == results.values_num - 1 && NULL != preproc_error)
{
if (ZBX_PREPROC_FAIL_SET_ERROR == result->action)
zbx_json_addstring(&json, ZBX_PROTO_TAG_FAILED, preproc_error, ZBX_JSON_TYPE_STRING);
}
else
{
if (ZBX_VARIANT_NONE != result->value.type)
{
zbx_json_addstring(&json, ZBX_PROTO_TAG_RESULT, zbx_variant_value_desc(&result->value),
ZBX_JSON_TYPE_STRING);
}
else
zbx_json_addstring(&json, ZBX_PROTO_TAG_RESULT, NULL, ZBX_JSON_TYPE_NULL);
}
zbx_json_close(&json);
}
zbx_tcp_send_bytes_to(sock, json.buffer, json.buffer_size, CONFIG_TIMEOUT);
zbx_json_free(&json);
ret = SUCCEED;
out:
if (FAIL == ret)
{
zbx_send_response(sock, ret, error, CONFIG_TIMEOUT);
zbx_free(error);
}
zbx_free(preproc_error);
zbx_free(error);
zbx_free(error_handler_params);
zbx_free(step_params);
zbx_free(last_ts);
zbx_free(last_value);
zbx_free(value);
zbx_vector_ptr_clear_ext(&results, (zbx_clean_func_t)zbx_preproc_result_free);
zbx_vector_ptr_destroy(&results);
zbx_vector_ptr_clear_ext(&steps, (zbx_clean_func_t)zbx_preproc_op_free);
zbx_vector_ptr_destroy(&steps);
return ret;
}
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