Add KeepAlive support for all TCP sockets.
/*
* Copyright (c) 2001,2016 Mario de Sousa (msousa@fe.up.pt)
*
* This file is part of the Modbus library for Beremiz and matiec.
*
* This Modbus library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 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 Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this Modbus library. If not, see <http://www.gnu.org/licenses/>.
*
* This code is made available on the understanding that it will not be
* used in safety-critical situations without a full and competent review.
*/
#ifndef MODBUS_LAYER1_H
#define MODBUS_LAYER1_H
#include <time.h> /* struct timespec data type */
#include "mb_types.h" /* get the data types */
#include "mb_addr.h" /* get definitions of common variable types */
/* Define max registers and bits */
#define MAX_READ_BITS 2000 /* Functions 0x01 and 0x02 */
#define MAX_READ_REGS 125 /* Functions 0x03 and 0x04 */
#define MAX_WRITE_COILS 1968 /* Function 0x0F */
#define MAX_WRITE_REGS 123 /* Function 0x10 */
/* Declare TCP layer1 functions */
#define modbus_write modbus_tcp_write
#define modbus_read modbus_tcp_read
#define modbus_init modbus_tcp_init
#define modbus_done modbus_tcp_done
#define modbus_connect modbus_tcp_connect
#define modbus_listen modbus_tcp_listen
#define modbus_close modbus_tcp_close
#define modbus_silence_init modbus_tcp_silence_init
#define modbus_get_min_timeout modbus_tcp_get_min_timeout
#include "mb_layer1_prototypes.h"
#undef modbus_write
#undef modbus_read
#undef modbus_init
#undef modbus_done
#undef modbus_connect
#undef modbus_listen
#undef modbus_close
#undef modbus_silence_init
#undef modbus_get_min_timeout
/* Declare RTU layer1 functions */
#define modbus_write modbus_rtu_write
#define modbus_read modbus_rtu_read
#define modbus_init modbus_rtu_init
#define modbus_done modbus_rtu_done
#define modbus_connect modbus_rtu_connect
#define modbus_listen modbus_rtu_listen
#define modbus_close modbus_rtu_close
#define modbus_silence_init modbus_rtu_silence_init
#define modbus_get_min_timeout modbus_rtu_get_min_timeout
#include "mb_layer1_prototypes.h"
#undef modbus_write
#undef modbus_read
#undef modbus_init
#undef modbus_done
#undef modbus_connect
#undef modbus_listen
#undef modbus_close
#undef modbus_silence_init
#undef modbus_get_min_timeout
/* Declare ASCII layer1 functions */
#define modbus_write modbus_ascii_write
#define modbus_read modbus_ascii_read
#define modbus_init modbus_ascii_init
#define modbus_done modbus_ascii_done
#define modbus_connect modbus_ascii_connect
#define modbus_listen modbus_ascii_listen
#define modbus_close modbus_ascii_close
#define modbus_silence_init modbus_ascii_silence_init
#define modbus_get_min_timeout modbus_ascii_get_min_timeout
#include "mb_layer1_prototypes.h"
#undef modbus_write
#undef modbus_read
#undef modbus_init
#undef modbus_done
#undef modbus_connect
#undef modbus_listen
#undef modbus_close
#undef modbus_silence_init
#undef modbus_get_min_timeout
#define modbus_write (*modbus_write )
#define modbus_read (*modbus_read )
#define modbus_init (*modbus_init )
#define modbus_done (*modbus_done )
#define modbus_connect (*modbus_connect )
#define modbus_listen (*modbus_listen )
#define modbus_close (*modbus_close )
#define modbus_silence_init (*modbus_silence_init )
#define modbus_get_min_timeout (*modbus_get_min_timeout)
typedef struct {
#include "mb_layer1_prototypes.h"
} layer1_funct_ptr_t;
#undef modbus_write
#undef modbus_read
#undef modbus_init
#undef modbus_done
#undef modbus_connect
#undef modbus_listen
#undef modbus_close
#undef modbus_silence_init
#undef modbus_get_min_timeout
extern layer1_funct_ptr_t fptr_[4];
#endif /* MODBUS_LAYER1_H */