linux-kernel - [SOLVED] Serial buffer corruption [was Re: FTDI usb-serial possible bug]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 4 May 2007 11:33:13 +0200
From:	"Antonino Ingargiola" <tritemio@...il.com>
To:	linux-usb-users@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [SOLVED] Serial buffer corruption [was Re: FTDI usb-serial possible bug]

Accidentally I've replied privately, sorry. Forwarding to ML...

---------- Forwarded message ----------
From: Antonino Ingargiola <tritemio@...il.com>
Date: May 4, 2007 11:29 AM
Subject: Re: [SOLVED] Serial buffer corruption [was Re: FTDI
usb-serial possible bug]
To: Oliver Neukum <oliver@...kum.org>


On 5/4/07, Oliver Neukum <oliver@...kum.org> wrote:
> Am Freitag, 4. Mai 2007 10:38 schrieb Antonino Ingargiola:
> > To solve the problem we must do a complete flush of all the buffer
> > chain. I do this flushing the input multiple times with a small pause
> > between them. In my case 10 flushes separated by a 10ms pause always
> > empties the whole buffer chain, so I get no corruption anymore. I'ts
> > not an elegant solution but it works (10 flushes are an overkill but I
> > want to be _really_ sure to read the correct data).
>
> How do you flush the buffers? Simply reading them out?

Nope. In python I use the flushInput() method of the serial object
defined by the pyserial library[0]. The method does just this system
call:

    termios.tcflush(self.fd, TERMIOS.TCIFLUSH)

that I think is correct.

Cheers,

  ~ Antonio

[0]: http://pyserial.sourceforge.net/ (or python-serial debian package)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/