Zabbix

/*

** Zabbix

** Copyright (C) 2001-2022 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 "proxy.h"

#include "zbxserver.h"

#include "zbxserialize.h"

#include "zbxipcservice.h"

​

#include "preproc.h"

#include "preprocessing.h"

#include "preproc_history.h"

​

#define PACKED_FIELD_RAW    0

#define PACKED_FIELD_STRING 1

#define MAX_VALUES_LOCAL    256

​

/* packed field data description */

typedef struct

{

    const void  *value; /* value to be packed */

    zbx_uint32_t    size;   /* size of a value (can be 0 for strings) */

    unsigned char   type;   /* field type */

}

zbx_packed_field_t;

​

#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;

​

/******************************************************************************

 *                                                                            *

 * Function: message_pack_data                                                *

 *                                                                            *

 * Purpose: helper for data packing based on defined format                   *

 *                                                                            *

 * Parameters: message - [OUT] IPC message, can be NULL for buffer size       *

 *                             calculations                                   *

 *             fields  - [IN]  the definition of data to be packed            *

 *             count   - [IN]  field count                                    *

 *                                                                            *

 * Return value: size of packed data or 0 if the message size would exceed    *

 *               4GB limit                                                    *

 *                                                                            *