[PATCH net-pu] tftp: fix get

Sascha Hauer s.hauer at pengutronix.de
Thu Jun 24 11:59:07 EDT 2010

Hi Baruch,

On Thu, Jun 24, 2010 at 04:26:16PM +0300, Baruch Siach wrote:
> With this patch tftp start requesting block 0 instead of 1. This fixes
> tftp get on i.MX25 based board with tftpd-hpa server.

This is strange. In case of tftp get this variable is not used for
sending packets. We do not request blocks with a certain number, we only
request a file and ack incoming packets. If you look at 'case TFTP_DATA'
in tftp_handler(), you'll see tftp_block getting overwritten by the
block number of the incoming packet.

The initialization of tftp_block is only used for tftp push. For tftp
push RFC1350 says that the first packet we send has to have block number
one (not zero). 

> tftp push isn't working though. I get:
> error frame: 0x83705178 0x00000882
> from the fec driver. I'll investigate this if I have time.

I also see this message sometimes, but usually this is not a problem.
The transfer continues once the timeout handler triggers and the packet
is resent.


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