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modbus_set_socket(3)
====================
NAME
----
modbus_set_socket - set socket of the context
SYNOPSIS
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*int modbus_set_socket(modbus_t *'ctx', int 's');*
DESCRIPTION
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The *modbus_set_socket()* function shall set the socket or file descriptor in
the libmodbus context. This function is useful for managing multiple client
connections to the same server.
RETURN VALUE
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The function shall return 0 if successful. Otherwise it shall return -1 and set errno.
EXAMPLE
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[source,c]
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ctx = modbus_new_tcp("127.0.0.1", 1502);
server_socket = modbus_tcp_listen(ctx, NB_CONNECTION);
FD_ZERO(&rdset);
FD_SET(server_socket, &rdset);
/* .... */
if (FD_ISSET(master_socket, &rdset)) {
modbus_set_socket(ctx, master_socket);
rc = modbus_receive(ctx, query);
if (rc != -1) {
modbus_reply(ctx, query, rc, mb_mapping);
}
}
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SEE ALSO
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linkmb:modbus_get_socket[3]
AUTHORS
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The libmodbus documentation was written by Stéphane Raimbault
<stephane.raimbault@gmail.com>