Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "pp_protocol.h"

#include "zbxcommon.h"

#include "zbxpreproc.h"

​

#include "zbxpreprocbase.h"

#include "zbxserialize.h"

#include "zbx_item_constants.h"

#include "zbxvariant.h"

#include "zbxtime.h"

#include "zbxstats.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;

​

    for (int 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;

}

​

static zbx_uint32_t fields_pack(const zbx_packed_field_t *fields, int fields_num, unsigned char *data)

{