Linux-Hams archive - January 1997: Re: listen problems.

Re: listen problems.

Richard Adams (dgqh.ebkbd@spyderco.com)
Sun, 5 Jan 1997 14:32:06 +0000 (GMT)


According to Jonathan Naylor, While burning my cpu.:
>
>
> Now I have a question, is it just a case of listen showing bad frames, or
> are the frames corrupt totally and therefore don't get routed by the IP
> and AX.25 layers ?
>
Listen is showing bad frames, but they are getting tho' ok.

> What may be worth trying is a Linux 2.1.x kernel. I would recommend
> 2.1.20 although don't try and use modules as they are broken at the
> moment in 2.1 land. Does the problem still persist ?
>
I did try 2.1.14 at the time, this is where i started seeing the problem, it
was a coinsidence that i ever saw it, simply because i was fooling around
with bpq ethernet at the time, which by the way has absolutly nothing to do
with the listen problem...

I could of course try it this coming week with 2.1.20..

Maybe there is someone else who can reproduce the problem as well, all that
is needed is 2 machines linked with ethernet, one of which will have the
radio(s), do a ping from the machine which is on ethernet to a host BEYOND
the router, the ping request packet will be shown normaly, but when the ping
reply is seen it will (i hope) be corrupt, thus showing the problem..

> Its a strange one to say the least. The more I think about it the more
> the problem appears to be in the interface code between the device
> drivers and the protocols. You must remember that amateur radio is one of
> the few things that uses should promiscuous monitoring of incoming and
> outgoing frames, and a bug in that part of the kernel may not be stamped
> on as quickly as in other parts.
>
Agreed, considering the fact that i can reproduce this on a machine running
a 1.3.76 kernel and ax25-utils 1.3.60. This must show that this feature or
bug has been there for a long time.

> Jonathan
>
> --
> +----------------------------------+---------------------------------------+
> | e-mail: hwnlm@i2rd.com | Telephone: +44 (0) 973 695261 |
> +----------------------------------+---------------------------------------+
> | Author of Linux kernel AX.25, NET/ROM and Rose. |
> +--------------------------------------------------------------------------+
>

-- 
Regards Richard, 73.
AX25  pa3gcu@pi8mid.#zld.nld.eu
smtp  xnq@terra.cl
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