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- modbus_receive(3)
- =================
- NAME
- ----
- modbus_receive - receive an indication request
- SYNOPSIS
- --------
- *int modbus_receive(modbus_t *'ctx', uint8_t *'req');*
- DESCRIPTION
- -----------
- The *modbus_receive()* function shall receive an indication request from the
- socket of the context _ctx_. This function is used by Modbus slave/server to
- receive and analyze indication request sent by the masters/clients.
- If you need to use another socket or file descriptor than the one defined in the
- context _ctx_, see the function linkmb:modbus_set_socket[3].
- RETURN VALUE
- ------------
- The function shall store the indication request in _req_ and return the request
- length if successful. The returned request length can be zero if the indication
- request is ignored (eg. a query for another slave in RTU mode). Otherwise it
- shall return -1 and set errno.
- SEE ALSO
- --------
- linkmb:modbus_set_socket[3]
- linkmb:modbus_reply[3]
- AUTHORS
- -------
- The libmodbus documentation was written by Stéphane Raimbault
- <stephane.raimbault@gmail.com>
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