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 "zbxcommon.h"

​

#ifdef HAVE_IPCSERVICE

​

#ifdef HAVE_LIBEVENT

#   include <event2/event.h>

#   include <event2/thread.h>

#   include <event2/util.h>

#endif

​

#include "zbxipcservice.h"

#include "zbxalgo.h"

#include "zbxstr.h"

​

#define ZBX_IPC_PATH_MAX    sizeof(((struct sockaddr_un *)0)->sun_path)

​

#define ZBX_IPC_DATA_DUMP_SIZE      128

​

static char ipc_path[ZBX_IPC_PATH_MAX] = {0};

static size_t   ipc_path_root_len = 0;

​

#define ZBX_IPC_CLIENT_STATE_NONE   0

#define ZBX_IPC_CLIENT_STATE_QUEUED 1

​

#define ZBX_IPC_ASYNC_SOCKET_STATE_NONE     0

#define ZBX_IPC_ASYNC_SOCKET_STATE_TIMEOUT  1

#define ZBX_IPC_ASYNC_SOCKET_STATE_ERROR    2

​

/* IPC client, providing nonblocking connections through socket */

struct zbx_ipc_client

{

    zbx_ipc_socket_t    csocket;

    zbx_ipc_service_t   *service;

​

    zbx_uint32_t        rx_header[2];

    unsigned char       *rx_data;

    zbx_uint32_t        rx_bytes;

    zbx_queue_ptr_t     rx_queue;

    struct event        *rx_event;

​

    zbx_uint32_t        tx_header[2];

    unsigned char       *tx_data;

    zbx_uint32_t        tx_bytes;

    zbx_queue_ptr_t     tx_queue;

    struct event        *tx_event;

​

    zbx_uint64_t        id;

    unsigned char       state;

​

    void            *userdata;

​

    zbx_uint32_t        refcount;

};

​

ZBX_PTR_VECTOR_IMPL(ipc_client_ptr, zbx_ipc_client_t *)

​

/*

 * Private API

 */

​

#define ZBX_IPC_HEADER_SIZE (int)(sizeof(zbx_uint32_t) * 2)

​

#define ZBX_IPC_MESSAGE_CODE    0

#define ZBX_IPC_MESSAGE_SIZE    1

​

#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x2000000

typedef int evutil_socket_t;

​

static struct event *event_new(struct event_base *ev, evutil_socket_t fd, short what,

        void(*cb_func)(int, short, void *), void *cb_arg)

{

    struct event    *event;

​

    event = zbx_malloc(NULL, sizeof(struct event));

    event_set(event, fd, what, cb_func, cb_arg);

    event_base_set(ev, event);

​