msousa@0: /*
msousa@0:  * Copyright (c) 2002,2016 Mario de Sousa (msousa@fe.up.pt)
msousa@0:  *
msousa@0:  * This file is part of the Modbus library for Beremiz and matiec.
msousa@0:  *
msousa@0:  * This Modbus library is free software: you can redistribute it and/or modify
msousa@0:  * it under the terms of the GNU Lesser General Public License as published by
msousa@0:  * the Free Software Foundation, either version 3 of the License, or
msousa@0:  * (at your option) any later version.
msousa@0:  *
msousa@0:  * This program is distributed in the hope that it will be useful, but
msousa@0:  * WITHOUT ANY WARRANTY; without even the implied warranty of
msousa@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 
msousa@0:  * General Public License for more details.
msousa@0:  *
msousa@0:  * You should have received a copy of the GNU Lesser General Public License
msousa@0:  * along with this Modbus library.  If not, see <http://www.gnu.org/licenses/>.
msousa@0:  *
msousa@0:  * This code is made available on the understanding that it will not be
msousa@0:  * used in safety-critical situations without a full and competent review.
msousa@0:  */
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: #ifndef MODBUS_TCP_PRIVATE_H
msousa@0: #define MODBUS_TCP_PRIVATE_H
msousa@0: 
msousa@0: 
msousa@0: #include "mb_util.h"
msousa@0: 
msousa@0: 
msousa@0: /* tcp port default configuration... */
msousa@0: #define DEF_SERVICE  "502"        /* port used by modbus */
msousa@0: #define DEF_PROTOCOL "tcp"        /* protocol used by modbus tcp */
msousa@0: #define DEF_TYPE     SOCK_STREAM  /* Quality of service required of the socket... */
msousa@0: #define DEF_MAX_PENDING_CONNECTION_REQUESTS 5
msousa@0:                                   /* maximum number of pending connection requests
msousa@0:                                    * that have not yet been accept()'ed
msousa@0:                                    */
msousa@0: #define DEF_CLOSE_ON_SILENCE 1    /* Used only by master nodes.
msousa@0:                                    * Flag indicating whether, by default, the connection
msousa@0:                                    * to the slave device should be closed whenever the
msousa@0:                                    * modbus_tcp_silence_init() function is called.
msousa@0:                                    *
msousa@0:                                    * 0  -> do not close connection
msousa@0:                                    * >0 -> close connection
msousa@0:                                    *
msousa@0:                                    * The spec sugests that connections that will not
msousa@0:                                    * be used for longer than 1 second should be closed.
msousa@0:                                    * Even though we expect most connections to have
msousa@0:                                    * silence intervals much shorted than 1 second, we
msousa@0:                                    * decide to use the default of shuting down the
msousa@0:                                    * connections because it is safer, and most other
msousa@0:                                    * implementations seem to do the same.
msousa@0:                                    * If we do not close we risk using up all the possible
msousa@0:                                    * connections that the slave can simultaneouly handle,
msousa@0:                                    * effectively locking out every other master that
msousa@0:                                    * wishes to communicate with that same slave.
msousa@0:                                    */
msousa@0: 
msousa@0:  /* Since the receive buffer is also re-used to store the frame header,
msousa@0:   * we set it to the larger of the two.
msousa@0:   */
msousa@0: #if     TCP_HEADER_LENGTH > MAX_L2_FRAME_LENGTH
msousa@0: #define RECV_BUFFER_SIZE    TCP_HEADER_LENGTH
msousa@0: #else
msousa@0: #define RECV_BUFFER_SIZE    MAX_L2_FRAME_LENGTH
msousa@0: #endif
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: #endif  /* MODBUS_TCP_PRIVATE_H */
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: 
msousa@0: