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/*
** Zabbix
** Copyright (C) 2001-2021 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 "service_actions.h"
/******************************************************************************
* *
* Function: condition_match_service *
* *
* Purpose: match service update by service id *
* *
******************************************************************************/
static int condition_match_service(const zbx_service_action_condition_t *condition,
const zbx_service_update_t *update)
{
zbx_uint64_t serviceid;
if (SUCCEED != is_uint64(condition->value, &serviceid) || serviceid != update->service->serviceid)
return FAIL;
return SUCCEED;
}
/******************************************************************************
* *
* Function: condition_match_service_name *
* *
* Purpose: match service update by service name *
* *
******************************************************************************/
static int condition_match_service_name(const zbx_service_action_condition_t *condition,
const zbx_service_update_t *update)
{
return zbx_strmatch_condition(update->service->name, condition->value, condition->op);
}
/******************************************************************************
* *
* Function: match_tags *
* *
* Purpose: match tag/tag+value using the specified operator *
* *
* Parameters: tags - [IN] the tags to match *
* name - [IN] the target tag name *
* value - [IN] the target tag value (NULL if only tag name are *
* being matched *
* op - [IN] the matching operator (CONDITION_OPERATOR_*) *
* *
* Return value: SUCCEED - the tags matches *
* FAIL - otherwise *
* *
* Comments: When matching tag+value the operator is using only to match *
* value - the tag name will be always matched as 'equal' *
* *
******************************************************************************/
static int match_tags(const zbx_vector_ptr_t *tags, const char *name, const char *value, unsigned char op)
{
int i, ret, expected_ret;
if (CONDITION_OPERATOR_EQUAL == op || CONDITION_OPERATOR_LIKE == op)
{
expected_ret = SUCCEED;
ret = FAIL;
}
else
{
expected_ret = FAIL;
ret = SUCCEED;
}
for (i = 0; i < tags->values_num; i++)
{
zbx_service_tag_t *tag = (zbx_service_tag_t *)tags->values[i];
if (NULL != value)
{
if (0 == strcmp(tag->name, name))
ret = zbx_strmatch_condition(tag->value, value, op);
else
continue;
}
else
ret = zbx_strmatch_condition(tag->name, name, op);
if (expected_ret == ret)
return ret;
}
return ret;
}
/******************************************************************************
* *
* Function: condition_match_service_tag *
* *
* Purpose: match service update by service tag name *
* *
******************************************************************************/
static int condition_match_service_tag(const zbx_service_action_condition_t *condition,
const zbx_service_update_t *update)
{
return match_tags(&update->service->tags, condition->value, NULL, condition->op);
}
/******************************************************************************
* *
* Function: condition_match_service_tag_value *
* *
* Purpose: match service update by service tag and its value *
* *
******************************************************************************/
static int condition_match_service_tag_value(const zbx_service_action_condition_t *condition,
const zbx_service_update_t *update)
{
return match_tags(&update->service->tags, condition->value2, condition->value, condition->op);
}
/******************************************************************************
* *
* Function: service_update_match_condition *
* *
* Purpose: match service update by the specified condition *
* *
******************************************************************************/
static const char *service_update_match_condition(const zbx_service_update_t *update,
const zbx_service_action_condition_t *condition)
{
int ret;
switch (condition->conditiontype)
{
case CONDITION_TYPE_SERVICE:
ret = condition_match_service(condition, update);
break;
case CONDITION_TYPE_SERVICE_NAME:
ret = condition_match_service_name(condition, update);
break;
case CONDITION_TYPE_EVENT_TAG:
ret = condition_match_service_tag(condition, update);
break;
case CONDITION_TYPE_EVENT_TAG_VALUE:
ret = condition_match_service_tag_value(condition, update);
break;
default:
THIS_SHOULD_NEVER_HAPPEN;
ret = FAIL;
}
return SUCCEED == ret ? "1" : "0";
}
/******************************************************************************
* *
* Function: service_update_match_action *
* *
* Purpose: match service update against the specified action *
* *
******************************************************************************/
static int service_update_match_action(const zbx_service_update_t *update, const zbx_service_action_t *action)
{
int index;
size_t pos = 0, last_pos = 0, expr_alloc = 0, expr_offset = 0;
char *expr = NULL, error[256];
const char *value;
zbx_token_t token;
zbx_uint64_t id;
double res;
if (0 == action->conditions.values_num)
return SUCCEED;
for (; SUCCEED == zbx_token_find(action->formula, (int)pos, &token, ZBX_TOKEN_SEARCH_FUNCTIONID); pos++)
{
switch (token.type)
{
case ZBX_TOKEN_OBJECTID:
if (SUCCEED == is_uint64_n(action->formula + token.data.objectid.name.l,
token.data.objectid.name.r - token.data.objectid.name.l + 1, &id))
{
zbx_strncpy_alloc(&expr, &expr_alloc, &expr_offset,
action->formula + last_pos, token.loc.l - last_pos);
if (FAIL != (index = zbx_vector_ptr_search(&action->conditions, &id,
ZBX_DEFAULT_UINT64_PTR_COMPARE_FUNC)))
{
value = service_update_match_condition(update,
action->conditions.values[index]);
}
else
value = "0";
zbx_strcpy_alloc(&expr, &expr_alloc, &expr_offset, value);
last_pos = token.loc.r + 1;
}
pos = token.loc.r;
break;
case ZBX_TOKEN_MACRO:
case ZBX_TOKEN_USER_MACRO:
case ZBX_TOKEN_LLD_MACRO:
pos = token.loc.r;
break;
}
}
zbx_strcpy_alloc(&expr, &expr_alloc, &expr_offset, action->formula + last_pos);
if (FAIL == evaluate(&res, expr, error, sizeof(error), NULL))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot evaluate action \"" ZBX_FS_UI64 "\" formula \"%s\": %s",
action->actionid, action->formula, error);
res = 0;
}
zbx_free(expr);
return SUCCEED == zbx_double_compare(res, 0) ? FAIL : SUCCEED;
}
/******************************************************************************
* *
* Function: service_update_process_actions *
* *
* Purpose: match service update against service actions *
* *
* Parameters: update - [IN] the service update generated when service *
* state changes *
* actions - [IN] the service actions *
* actionids - [OUT] the matched action identifiers *
* *
******************************************************************************/
void service_update_process_actions(const zbx_service_update_t *update, zbx_hashset_t *actions,
zbx_vector_uint64_t *actionids)
{
zbx_hashset_iter_t iter;
zbx_service_action_t *action;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() serviceid:" ZBX_FS_UI64, __func__, update->service->serviceid);
zbx_hashset_iter_reset(actions, &iter);
while (NULL != (action = (zbx_service_action_t *)zbx_hashset_iter_next(&iter)))
{
if (SUCCEED == service_update_match_action(update, action))
zbx_vector_uint64_append(actionids, action->actionid);
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s() matched:%d", __func__, actionids->values_num);
}
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