Wireless TCP aborts

[Pyun YongHyeon]

On Sun, Mar 07, 2010 at 02:16:36PM -0800, Tim Kientzle wrote:
> Using ssh and rsync to copy a lot of stuff from my
> old desktop to my new laptop.  The old desktop is using
> a wired connection to an (admittedly crappy) D-Link router,
> the new one is using an Atheros wireless connection to the
> same router.  I periodically see the transfer fail with
> the following messages on the wireless side:
> 
>   Corrupted MAC on input.
>   Disconnecting: Packet corrupt

I guess this message came from ssh.

>   rsync: connection unexpectedly closed ... [receiver]
> 
> and then the rsync session is dead.
> 
> It seems odd that a single corrupt packet would terminate
> the TCP connection.
> 

I think it's default behavior of ssh if it detect malformed packet.
I used to see this forced disconnection of ssh when driver
incorrectly set RX checksum flag OK for corrupted packets which
were caused by hardware bug.

> uname: FreeBSD 9.0-CURRENT r201154M: Tue Dec 29 09:27:29 PST 2009