TFTP Client Example
eric.norum at usask.ca
Thu Apr 19 14:31:05 UTC 2001
Gerke Kok wrote:
> I think you could have a look at the tftp client in the 'etherboot' project.
> I use it myself in a bootloader program. It only requires you to have
> ether_read and ether_write functions. You can easily port it to RTEMS I
Yes, but RTEMS already has a TFTP `network file system' driver which
makes access to files on a TFTP server almost the same as access to any
other file. Usage is very simple:
1) After initializing the network, register the TFTP driver:
2) Remote files are opened by prepending /TFTP/server_address/ to
open ("/TFTP/128.233.xx.yy/path/name', 0);
fopen ("/TFTP/128.233.xx.yy/path/name', "r");
3) Then just read/fread/getc as for any other file.
No seek operations, though.
A file can be open for reading or writing, but not both.
Opening a file for writing must meet the TFTP restrictions
(already exist on server, world writeable).
The above calls will open /tftpboot/path/name on my TFTP server,
since the TFTP daemon has been started with:
/usr/sbin/in.tftpd -s /tftpboot
Eric Norum eric.norum at usask.ca
Department of Electrical Engineering Phone: (306) 966-5394
University of Saskatchewan FAX: (306) 966-5407
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