User`s manual

.NETFOPN

5-40

.NETFOPN

Name

.NETFOPN - Open Þle for reading

Code

$001B

Description

This routine allows the user to open a Þle for reading. The Þrmware

basically transmits a TFTP Read Request for the speciÞed Þle and

returns to the user. It is your responsibility to retrieve the

forthcoming Þle blocks; you would use the .NETFRD system call to

do this. You must also perform the Þle block retrievals in a timely

fashion, else the TFTP server will time-out.

Information about the Þle open/request is passed in a command

packet which has been built in memory. (The user program must

Þrst manually prepare the packet.) The address of the packet is

passed as an argument to the routine. All packets must be word-

aligned.

The format of the packet structure, NFILEOPEN, is shown below:

FEDCBA9876543210

$00 Controller LUN Device LUN

$02 Status Word

$04

$42

Filename String $40(&64) Bytes