linux-kernel - Re: Insanely high baud rates

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Message-ID: <20181011193651.GA11500@isi.edu>
Date:   Thu, 11 Oct 2018 12:36:51 -0700
From:   Craig Milo Rogers <rogers@....edu>
To:     Alan Cox <gnomes@...rguk.ukuu.org.uk>
Cc:     hpa@...or.com, linux-serial@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>, Johan Hovold <johan@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: Insanely high baud rates

On 18.10.11, Alan Cox wrote:
> I mean - what is the baud rate of a pty  ?

	Solaris made the distinction between B0, which means pty hangup mode,
and any other baud rate:

https://docs.oracle.com/cd/E88353_01/html/E37851/pty-4d.html

	But... why not implement a pty bandwidth limitation layer?  You say, I
need to justify it?  It's for, uh... protecting the system from unrestricted
pty usage DOS attacks!  Yeah.  That's what it's for.

					Craig Milo Rogers