Re: [lwip-devel] Wrong value of the initial window (SYN packets) with big TCP_WND and window scaling.

[Simon Goldschmidt]

Dmitry Adamushko wrote:
> [ I'm not subscribed to the list, please keep me in cc' ]

I'll try, but it's highly unlikely that everyone replies 'to all' (in case this 
discussion should go on). This is a list. Normally, you wouldn't even be 
allowed to send to it when not subscribed.

> This is exactly the scenario with window-scaling enabled (sorry that I didn't 
> make it explicit).
> Hence, TCP_WND > 0xffff is legitimate.

Yes, right, sorry for not getting that :-)

I've filed a bug for this:

https://savannah.nongnu.org/bugs/index.php?45559

Seems like we should either limit the window to 0xFFFF or set it to some 
default value. I don't know right now if the remote side scales our initial 
window with the scaling factor, in which case 0xFFFF might be too big.

Simon