From: pa3gcu (oxtl.tfmgcq@tele2.it)
Date: Sat Sep 29 2001 - 14:40:00 EEST
On Saturday 29 September 2001 10:11, Cees Tool wrote:
> Hi Richard/Tomi & others,
Hello Cees en all.
>
> Yes I can verify this. And it is not only happening with AXIP internet
> links, but I see rubbish like this also on our radio links.
>
> Do you know what software is used by YO4GAB-2 ??
I cant connect to that node to find out, however what looks like his nearest
neighbour is YO3KXL-2 and he is using Tnos so i would guess that YO4GAB-2 is
also using Tnos, (note guess).
users do not seem to have netrom permissions in YO3KXL-2 so i could not
connect.
In all neighbours of mine i see YO4GAB-2 with different neibours, i have
tryed them all but YO4GAB-2 seems to be unconnectable, or at least thro'
other nodes i have tryed.
As you mentioned it is not only this node which is transmitting this sort of
rubbish, i will keep an eye open here and see if i can get more callsigns.
>
> Here, we have seen some strange-frames passing our nodes and also
> connect-requests to our nodes. After debugging, those frames seem to be
> defective netrom nodes-broadcast frames. We have seen them originating from
> TNOS nodes. (but maybe other sofware is also involved) Such a
> broken-node-broadcast frame have a "sender" of the originating node. The
> netrom content of frame itself is sent to the node which would be the first
> node in the nodes-broadcast-frame and his alias is in place of the normal
> TTL, ID-bytes and opcode. When you look at the frames, the alias can still
> be recognized, however it changes every hop, because one byte is in place
> of the TTL.
>
> If your node is "lucky" to be the top-node in a frame of nodes-broadcast,
> then you will receive also connects of very exotic (non existing calls) on
> your netrom-appication if the bytes of the 'alias' represent a
> 'connect-request'. Otherwise you may receive invalid netrom frames. I don't
> know why this is happening yet, but I hope it has the attention of writers
> of the software from where these frames seem to originate.
>
> The full description of what we have observed some months ago is on my
> homepage :
> http://www.qsl.net/pa3aes/pub/broken-netrom.txt
The above is very informative.
>
> 73,
> Cees - PA3AES
>
-- Regards Richard cnzaauwg.tyonbommm@clapper.org http://people.zeelandnet.nl/pa3gcu - To unsubscribe from this list: send the line "unsubscribe linux-hams" in the body of a message to terhi.victor@logonet.com More majordomo info at http://vger.kernel.org/majordomo-info.html
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