[PATCH] net: tftp: Add client support for RFC 7440

[Marek Vasut]

On 5/15/20 12:00 PM, Ramon Fried wrote:
> Add support for RFC 7440: "TFTP Windowsize Option".
> 
> This optional feature allows the client and server
> to negotiate a window size of consecutive blocks to send as an
> alternative for replacing the single-block lockstep schema.
> 
> windowsize can be defined statically during compilation by
> setting CONFIG_TFTP_WINDOWSIZE, or defined in runtime by
> setting an environment variable: "tftpwindowsize"
> If not defined, the windowsize is set to 1, meaning that it
> behaves as it was never defined.
> 
> Choosing the appropriate windowsize depends on the specific
> network topology, underlying NIC.
> You should test various windowsize scenarios and see which
> best work for you.
> 
> Setting a windowsize too big can actually decreases performance.
> 
> Signed-off-by: Ramon Fried <rfried.dev at gmail.com>

Reviewed-by: Marek Vasut <marex at denx.de>