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/*

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 * Copyright (c) 2002,2016 Mario de Sousa (msousa@fe.up.pt)

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 *

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 * This file is part of the Modbus library for Beremiz and matiec.

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 *

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 * This Modbus library is free software: you can redistribute it and/or modify

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 * it under the terms of the GNU Lesser General Public License as published by

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 * the Free Software Foundation, either version 3 of the License, or

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 * (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful, but

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 * WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 

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 * General Public License for more details.

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 *

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 * You should have received a copy of the GNU Lesser General Public License

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 * along with this Modbus library.  If not, see <http://www.gnu.org/licenses/>.

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 *

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 * This code is made available on the understanding that it will not be

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 * used in safety-critical situations without a full and competent review.

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 */

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#ifndef MODBUS_LAYER2_H

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#define MODBUS_LAYER2_H

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#include <time.h> /* struct timespec data type */

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//#include <sys/socket.h>

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//#include <netinet/in.h>

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#include <netinet/ip.h> /* superset of previous */ // Required for INADDR_ANY

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/* Library Error codes */

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#define PORT_FAILURE   -101

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#define INTERNAL_ERROR -102

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#define TIMEOUT        -103

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#define INVALID_FRAME  -104

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#define MODBUS_ERROR   -105

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/* NOTE: Modbus error codes are defined in mb_util.h */

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typedef enum {optimize_speed, optimize_size} optimization_t;

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typedef enum {

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        naf_ascii,

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        naf_rtu,

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        naf_tcp,

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  } node_addr_family_t;

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typedef struct {

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        const char *host;

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        const char *service;

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        int         close_on_silence;  

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  } node_addr_tcp_t;

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typedef struct {

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        const char *device;

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        int         baud;       /* plain baud rate, eg 2400; zero for the default 9600 */

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        int         parity;     /* 0 for none, 1 for odd, 2 for even                   */

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        int         data_bits;

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        int         stop_bits;

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        int         ignore_echo; /* 1 => ignore echo; 0 => do not ignore echo */

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  } node_addr_rtu_t;

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typedef node_addr_rtu_t node_addr_ascii_t;

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typedef union {

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        node_addr_ascii_t ascii;

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        node_addr_rtu_t   rtu;

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        node_addr_tcp_t   tcp;

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  } node_addr_common_t;

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typedef struct {

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        node_addr_family_t  naf;

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        node_addr_common_t  addr;

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  } node_addr_t;

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#endif  /* MODBUS_LAYER2_H */

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