53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* Copyright © 2001-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#ifndef MODBUS_TCP_H
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#define MODBUS_TCP_H
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#include "modbus.h"
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MODBUS_BEGIN_DECLS
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#if defined(_WIN32) && !defined(__CYGWIN__)
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/* Win32 with MinGW, supplement to <errno.h> */
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#include <winsock2.h>
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#if !defined(ECONNRESET)
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#define ECONNRESET WSAECONNRESET
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#endif
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#if !defined(ECONNREFUSED)
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#define ECONNREFUSED WSAECONNREFUSED
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#endif
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#if !defined(ETIMEDOUT)
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#define ETIMEDOUT WSAETIMEDOUT
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#endif
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#if !defined(ENOPROTOOPT)
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#define ENOPROTOOPT WSAENOPROTOOPT
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#endif
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#if !defined(EINPROGRESS)
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#define EINPROGRESS WSAEINPROGRESS
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#endif
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#endif
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#define MODBUS_TCP_DEFAULT_PORT 502
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#define MODBUS_TCP_SLAVE 0xFF
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/* Modbus_Application_Protocol_V1_1b.pdf Chapter 4 Section 1 Page 5
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* TCP MODBUS ADU = 253 bytes + MBAP (7 bytes) = 260 bytes
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*/
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#define MODBUS_TCP_MAX_ADU_LENGTH 260
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MODBUS_API modbus_t* modbus_new_tcp(const char *ip_address, int port);
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MODBUS_API int modbus_tcp_listen(modbus_t *ctx, int nb_connection);
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MODBUS_API int modbus_tcp_accept(modbus_t *ctx, int *s);
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MODBUS_API modbus_t* modbus_new_tcp_pi(const char *node, const char *service);
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MODBUS_API int modbus_tcp_pi_listen(modbus_t *ctx, int nb_connection);
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MODBUS_API int modbus_tcp_pi_accept(modbus_t *ctx, int *s);
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MODBUS_END_DECLS
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#endif /* MODBUS_TCP_H */
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