[U-Boot] tftp reliability

[Chris Packham]

On Tue, Sep 19, 2017 at 8:26 AM, Ran Shalit <ranshalit at gmail.com> wrote:
> Hello,
>
> Does tftp checks the integrity of the file with checksum or any other
> similar method ? If not - how can it assure the reliability of the
> file that was transferred ?

In short it doesn't. Beyond a simple block id and ack there is nothing
that ensures what was sent is what was received.

You need to rely on something else to verify the data. Fortunately
u-boot supports some options for doing so. At $dayjob we use FIT[1]
images for our firmware which can include multiple hashes and even
signatures if desired.

[1] - http://git.denx.de/?p=u-boot.git;a=tree;f=doc/uImage.FIT