Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 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 "preprocessing.h"

#include "zbxpreproc.h"

#include "preproc.h"

​

#include "log.h"

#include "zbxserialize.h"

#include "zbxsysinfo.h"

#include "zbx_item_constants.h"

#include "zbxlld.h"

​

#define PACKED_FIELD_RAW    0

#define PACKED_FIELD_STRING 1

​

#define PACKED_FIELD(value, size)   \

        (zbx_packed_field_t){(value), (size), (0 == (size) ? PACKED_FIELD_STRING : PACKED_FIELD_RAW)};

​

static zbx_ipc_message_t    cached_message;

static int          cached_values;

​

ZBX_PTR_VECTOR_IMPL(ipcmsg, zbx_ipc_message_t *)

​

static zbx_uint32_t fields_calc_size(zbx_packed_field_t *fields, int fields_num)

{

    zbx_uint32_t    data_size = 0, field_size;

    int     i;

​

    for (i = 0; i < fields_num; i++)

    {

        if (PACKED_FIELD_STRING == fields[i].type)

        {

            field_size = (NULL != fields[i].value) ? (zbx_uint32_t)strlen((const char *)fields[i].value) + 1 : 0;

            fields[i].size = (zbx_uint32_t)field_size;

            field_size += (zbx_uint32_t)sizeof(zbx_uint32_t);

        }

        else

            field_size = fields[i].size;

​

        if (UINT32_MAX - field_size < data_size)

            return 0;

​

        data_size += field_size;

    }

​

    return data_size;