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TCP-group 1992

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ax25 filter

I have been getting garbage calls in my NOS ax heard lists, at my
switch, since changing from NRS to KISS interface on two of my ports.

I looked at the code and I believe that it does not really filter but
rather allows listing of source/destination data based on a switch.
It this correct?

What I did not understand is why no bad data ever appears in the Netrom
node listings. In looking at the code it appears that there is some
small amount of checking - like if the alias is ASCII and within a
certain length but I did not see more than that.

Since I do not see any RX HW data overruns on this system then can I
assume that the TNC is decoding garbage and sending it to NOS. Why
would'nt NOS reject based on a packet checksum?

The real netrom code uses an algorithum to look at the call and determine
if it is valid. Although not 100% efficient it does work. Could this be
applied to NOS.

73 Doug

Document URL : http://www.a00.de/tcpgroup/1992/msg00167.php
Ralf D. Kloth, Ludwigsburg, DE (QRQ.software). < hostmaster at a00.de > [don't send spam]
Created 2004-11-12. Last modified 2004-11-12. Your visit 2021-10-18 16:48.54. Page created in 0.0136 sec.
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