openssh unix dev - Jul 2007 - Deciding when to adjust the window size

What is the algorithm adopted by OpenSSH when it comes to deciding
when to adjust the size of window? I would have thought that one'd
better adjust the window size as soon as it has fallen below the
maximum packet size. What worries me is a potential deadlock, in which
one party does not send anything, because the window is too small for
its next window space-consuming packet, while the other does not
adjust the window on the grounds that it reckons it size still is
large enough. How are such situations avoided?

On Tue, 17 Jul 2007, JCA wrote:
>     What is the algorithm adopted by OpenSSH when it comes to deciding
> when to adjust the size of window? I would have thought that one'd
> better adjust the window size as soon as it has fallen below the
> maximum packet size. What worries me is a potential deadlock, in which
> one party does not send anything, because the window is too small for
> its next window space-consuming packet, while the other does not
> adjust the window on the grounds that it reckons it size still is
> large enough. How are such situations avoided?
channels.c::channel_check_window() contains this logic.

-d