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/>.

**/

​

#ifndef ZABBIX_ASYNC_TELNET_H_

#define ZABBIX_ASYNC_TELNET_H_

​

#include "zbxcacheconfig.h"

#include "zbxasyncpoller.h"

#include "zbxcomms.h"

​

typedef enum

{

    ZABBIX_TELNET_STEP_CONNECT_INIT = 0,

    ZABBIX_TELNET_STEP_CONNECT_WAIT,

    ZABBIX_TELNET_STEP_SEND,

    ZABBIX_TELNET_STEP_RECV

}

zbx_zabbix_telnet_step_t;

​

typedef enum

{

    ZABBIX_TELNET_PROTOCOL_RECV_FIRST = 0,

    ZABBIX_TELNET_PROTOCOL_RECV_SECOND,

    ZABBIX_TELNET_PROTOCOL_RECV_THIRD,

    ZABBIX_TELNET_PROTOCOL_RECV_FAIL,

    ZABBIX_TELNET_PROTOCOL_SEND

}

zbx_telnet_protocol_step_t;

​

ZBX_VECTOR_DECL(telnet_recv, unsigned char)

​

typedef struct zbx_telnet_state

{

    zbx_telnet_protocol_step_t  state;

    unsigned char           c1;

    unsigned char           c2;

    unsigned char           c3;

    unsigned char           response[3];

    zbx_vector_telnet_recv_t    buff;

}

zbx_recv_context_t;

​

typedef struct zbx_telnet_context

{

    zbx_dc_item_context_t       item;

    void                *arg;

    void                *arg_action;

    zbx_socket_t            s;

    zbx_recv_context_t      recv_context;

    zbx_tcp_send_context_t      tcp_send_context;

    zbx_zabbix_telnet_step_t    step;

    char                *server_name;