Provided by: libmodbus-dev_3.1.6-2_amd64 
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 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
modbus_set_socket(3) modbus_reply(3)
AUTHORS
The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com>