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>